| File: | var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp |
| Warning: | line 2057, column 9 Value stored to 'mustBackoff' is never read |
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| 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| 2 | /* vim:set ts=2 sw=2 sts=2 et cindent: */ |
| 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| 6 | |
| 7 | #include "OggDemuxer.h" |
| 8 | #include "OggRLBox.h" |
| 9 | #include "MediaDataDemuxer.h" |
| 10 | #include "OggCodecState.h" |
| 11 | #include "TimeUnits.h" |
| 12 | #include "XiphExtradata.h" |
| 13 | #include "mozilla/AbstractThread.h" |
| 14 | #include "mozilla/Atomics.h" |
| 15 | #include "mozilla/PodOperations.h" |
| 16 | #include "mozilla/ScopeExit.h" |
| 17 | #include "mozilla/SchedulerGroup.h" |
| 18 | #include "mozilla/SharedThreadPool.h" |
| 19 | #include "mozilla/Telemetry.h" |
| 20 | #include "mozilla/TimeStamp.h" |
| 21 | #include "nsDebug.h" |
| 22 | #include "nsAutoRef.h" |
| 23 | #include "nsError.h" |
| 24 | |
| 25 | #include <algorithm> |
| 26 | |
| 27 | extern mozilla::LazyLogModule gMediaDemuxerLog; |
| 28 | #define OGG_DEBUG(arg, ...) \ |
| 29 | DDMOZ_LOG(gMediaDemuxerLog, mozilla::LogLevel::Debug, "::%s: " arg, \do { if (DecoderDoctorLogger::IsDDLoggingEnabled() || (__builtin_expect (!!(mozilla::detail::log_test(gMediaDemuxerLog, mozilla::LogLevel ::Debug)), 0))) { DDLOGPRCheck("::%s: " arg, __func__, ##__VA_ARGS__ ); DecoderDoctorLogger::MozLogPrintf(this, gMediaDemuxerLog, mozilla ::LogLevel::Debug, "::%s: " arg, __func__, ##__VA_ARGS__); } } while (0) |
| 30 | __func__, ##__VA_ARGS__)do { if (DecoderDoctorLogger::IsDDLoggingEnabled() || (__builtin_expect (!!(mozilla::detail::log_test(gMediaDemuxerLog, mozilla::LogLevel ::Debug)), 0))) { DDLOGPRCheck("::%s: " arg, __func__, ##__VA_ARGS__ ); DecoderDoctorLogger::MozLogPrintf(this, gMediaDemuxerLog, mozilla ::LogLevel::Debug, "::%s: " arg, __func__, ##__VA_ARGS__); } } while (0) |
| 31 | |
| 32 | // Un-comment to enable logging of seek bisections. |
| 33 | // #define SEEK_LOGGING |
| 34 | #ifdef SEEK_LOGGING |
| 35 | # define SEEK_LOG(type, msg) MOZ_LOG(gMediaDemuxerLog, type, msg)do { const ::mozilla::LogModule* moz_real_module = gMediaDemuxerLog ; if ((__builtin_expect(!!(mozilla::detail::log_test(moz_real_module , type)), 0))) { mozilla::detail::log_print(moz_real_module, type , MOZ_LOG_EXPAND_ARGS msg); } } while (0) |
| 36 | #else |
| 37 | # define SEEK_LOG(type, msg) |
| 38 | #endif |
| 39 | |
| 40 | #define CopyAndVerifyOrFail(t, cond, failed) \ |
| 41 | (t).copy_and_verify([&](auto val) { \ |
| 42 | if (!(cond)) { \ |
| 43 | *(failed) = true; \ |
| 44 | } \ |
| 45 | return val; \ |
| 46 | }) |
| 47 | |
| 48 | namespace mozilla { |
| 49 | |
| 50 | using media::TimeInterval; |
| 51 | using media::TimeIntervals; |
| 52 | using media::TimeUnit; |
| 53 | |
| 54 | // The number of microseconds of "fuzz" we use in a bisection search over |
| 55 | // HTTP. When we're seeking with fuzz, we'll stop the search if a bisection |
| 56 | // lands between the seek target and OGG_SEEK_FUZZ_USECS microseconds before the |
| 57 | // seek target. This is becaue it's usually quicker to just keep downloading |
| 58 | // from an exisiting connection than to do another bisection inside that |
| 59 | // small range, which would open a new HTTP connetion. |
| 60 | static const TimeUnit OGG_SEEK_FUZZ_USECS = TimeUnit::FromMicroseconds(500000); |
| 61 | |
| 62 | // The number of microseconds of "pre-roll" we use for Opus streams. |
| 63 | // The specification recommends 80 ms. |
| 64 | static const TimeUnit OGG_SEEK_OPUS_PREROLL = TimeUnit::FromMicroseconds(80000); |
| 65 | |
| 66 | static Atomic<uint32_t> sStreamSourceID(0u); |
| 67 | |
| 68 | OggDemuxer::nsAutoOggSyncState::nsAutoOggSyncState(rlbox_sandbox_ogg* aSandbox) |
| 69 | : mSandbox(aSandbox) { |
| 70 | if (mSandbox) { |
| 71 | tainted_ogg<ogg_sync_state*> state = |
| 72 | mSandbox->malloc_in_sandbox<ogg_sync_state>(); |
| 73 | MOZ_RELEASE_ASSERT(state != nullptr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(state != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(state != nullptr))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("state != nullptr" , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 73); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "state != nullptr" ")"); do { *((volatile int*)__null) = 73; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 74 | mState = state.to_opaque(); |
| 75 | sandbox_invoke(*mSandbox, ogg_sync_init, mState)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_init)>( "ogg_sync_init", reinterpret_cast<void *>(&ogg_sync_init), mState); |
| 76 | } |
| 77 | } |
| 78 | OggDemuxer::nsAutoOggSyncState::~nsAutoOggSyncState() { |
| 79 | if (mSandbox) { |
| 80 | sandbox_invoke(*mSandbox, ogg_sync_clear, mState)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_clear)>( "ogg_sync_clear", reinterpret_cast<void *>(&ogg_sync_clear), mState); |
| 81 | mSandbox->free_in_sandbox(rlbox::from_opaque(mState)); |
| 82 | tainted_ogg<ogg_sync_state*> null = nullptr; |
| 83 | mState = null.to_opaque(); |
| 84 | } |
| 85 | } |
| 86 | |
| 87 | /* static */ |
| 88 | rlbox_sandbox_ogg* OggDemuxer::CreateSandbox() { |
| 89 | rlbox_sandbox_ogg* sandbox = new rlbox_sandbox_ogg(); |
| 90 | #ifdef MOZ_WASM_SANDBOXING_OGG |
| 91 | bool success = sandbox->create_sandbox(false /* infallible */); |
| 92 | #else |
| 93 | bool success = sandbox->create_sandbox(); |
| 94 | #endif |
| 95 | if (!success) { |
| 96 | delete sandbox; |
| 97 | sandbox = nullptr; |
| 98 | } |
| 99 | return sandbox; |
| 100 | } |
| 101 | |
| 102 | void OggDemuxer::SandboxDestroy::operator()(rlbox_sandbox_ogg* sandbox) { |
| 103 | if (sandbox) { |
| 104 | sandbox->destroy_sandbox(); |
| 105 | delete sandbox; |
| 106 | } |
| 107 | } |
| 108 | |
| 109 | // Return the corresponding category in aKind based on the following specs. |
| 110 | // (https://www.whatwg.org/specs/web-apps/current- |
| 111 | // work/multipage/embedded-content.html#dom-audiotrack-kind) & |
| 112 | // (http://wiki.xiph.org/SkeletonHeaders) |
| 113 | nsString OggDemuxer::GetKind(const nsCString& aRole) { |
| 114 | if (aRole.Find("audio/main") != -1 || aRole.Find("video/main") != -1) { |
| 115 | return u"main"_ns; |
| 116 | } |
| 117 | if (aRole.Find("audio/alternate") != -1 || |
| 118 | aRole.Find("video/alternate") != -1) { |
| 119 | return u"alternative"_ns; |
| 120 | } |
| 121 | if (aRole.Find("audio/audiodesc") != -1) { |
| 122 | return u"descriptions"_ns; |
| 123 | } |
| 124 | if (aRole.Find("audio/described") != -1) { |
| 125 | return u"main-desc"_ns; |
| 126 | } |
| 127 | if (aRole.Find("audio/dub") != -1) { |
| 128 | return u"translation"_ns; |
| 129 | } |
| 130 | if (aRole.Find("audio/commentary") != -1) { |
| 131 | return u"commentary"_ns; |
| 132 | } |
| 133 | if (aRole.Find("video/sign") != -1) { |
| 134 | return u"sign"_ns; |
| 135 | } |
| 136 | if (aRole.Find("video/captioned") != -1) { |
| 137 | return u"captions"_ns; |
| 138 | } |
| 139 | if (aRole.Find("video/subtitled") != -1) { |
| 140 | return u"subtitles"_ns; |
| 141 | } |
| 142 | return u""_ns; |
| 143 | } |
| 144 | |
| 145 | void OggDemuxer::InitTrack(MessageField* aMsgInfo, TrackInfo* aInfo, |
| 146 | bool aEnable) { |
| 147 | MOZ_ASSERT(aMsgInfo)do { static_assert( mozilla::detail::AssertionConditionType< decltype(aMsgInfo)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(aMsgInfo))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("aMsgInfo", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 147); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aMsgInfo" ")" ); do { *((volatile int*)__null) = 147; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 148 | MOZ_ASSERT(aInfo)do { static_assert( mozilla::detail::AssertionConditionType< decltype(aInfo)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(aInfo))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("aInfo", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 148); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aInfo" ")"); do { *((volatile int*)__null) = 148; __attribute__((nomerge) ) ::abort(); } while (false); } } while (false); |
| 149 | |
| 150 | nsCString* sName = aMsgInfo->mValuesStore.Get(eName); |
| 151 | nsCString* sRole = aMsgInfo->mValuesStore.Get(eRole); |
| 152 | nsCString* sTitle = aMsgInfo->mValuesStore.Get(eTitle); |
| 153 | nsCString* sLanguage = aMsgInfo->mValuesStore.Get(eLanguage); |
| 154 | aInfo->Init(sName ? NS_ConvertUTF8toUTF16(*sName) : EmptyString(), |
| 155 | sRole ? GetKind(*sRole) : u""_ns, |
| 156 | sTitle ? NS_ConvertUTF8toUTF16(*sTitle) : EmptyString(), |
| 157 | sLanguage ? NS_ConvertUTF8toUTF16(*sLanguage) : EmptyString(), |
| 158 | aEnable); |
| 159 | } |
| 160 | |
| 161 | OggDemuxer::OggDemuxer(MediaResource* aResource) |
| 162 | : mSandbox(CreateSandbox()), |
| 163 | mTheoraState(nullptr), |
| 164 | mVorbisState(nullptr), |
| 165 | mOpusState(nullptr), |
| 166 | mFlacState(nullptr), |
| 167 | mOpusEnabled(MediaDecoder::IsOpusEnabled()), |
| 168 | mSkeletonState(nullptr), |
| 169 | mAudioOggState(aResource, mSandbox.get()), |
| 170 | mVideoOggState(aResource, mSandbox.get()), |
| 171 | mIsChained(false), |
| 172 | mTimedMetadataEvent(nullptr), |
| 173 | mOnSeekableEvent(nullptr) { |
| 174 | MOZ_COUNT_CTOR(OggDemuxer)do { static_assert(std::is_class_v<OggDemuxer>, "Token '" "OggDemuxer" "' is not a class type."); static_assert(!std:: is_base_of<nsISupports, OggDemuxer>::value, "nsISupports classes don't need to call MOZ_COUNT_CTOR or " "MOZ_COUNT_DTOR");; NS_LogCtor((void*)this, "OggDemuxer", sizeof (*this)); } while (0); |
| 175 | // aResource is referenced through inner m{Audio,Video}OffState members. |
| 176 | DDLINKCHILD("resource", aResource)do { if (DecoderDoctorLogger::IsDDLoggingEnabled()) { DecoderDoctorLogger ::LinkParentAndChild(this, "resource", aResource); } } while ( 0); |
| 177 | } |
| 178 | |
| 179 | OggDemuxer::~OggDemuxer() { |
| 180 | MOZ_COUNT_DTOR(OggDemuxer)do { static_assert(std::is_class_v<OggDemuxer>, "Token '" "OggDemuxer" "' is not a class type."); static_assert(!std:: is_base_of<nsISupports, OggDemuxer>::value, "nsISupports classes don't need to call MOZ_COUNT_CTOR or " "MOZ_COUNT_DTOR");; NS_LogDtor((void*)this, "OggDemuxer", sizeof (*this)); } while (0); |
| 181 | Reset(TrackInfo::kAudioTrack); |
| 182 | Reset(TrackInfo::kVideoTrack); |
| 183 | } |
| 184 | |
| 185 | void OggDemuxer::SetChainingEvents(TimedMetadataEventProducer* aMetadataEvent, |
| 186 | MediaEventProducer<void>* aOnSeekableEvent) { |
| 187 | mTimedMetadataEvent = aMetadataEvent; |
| 188 | mOnSeekableEvent = aOnSeekableEvent; |
| 189 | } |
| 190 | |
| 191 | bool OggDemuxer::HasAudio() const { |
| 192 | return mVorbisState || mOpusState || mFlacState; |
| 193 | } |
| 194 | |
| 195 | bool OggDemuxer::HasVideo() const { return mTheoraState; } |
| 196 | |
| 197 | bool OggDemuxer::HaveStartTime() const { return mStartTime.isSome(); } |
| 198 | |
| 199 | TimeUnit OggDemuxer::StartTime() const { |
| 200 | return mStartTime.refOr(TimeUnit::Zero()); |
| 201 | } |
| 202 | |
| 203 | bool OggDemuxer::HaveStartTime(TrackInfo::TrackType aType) { |
| 204 | return OggState(aType).mStartTime.isSome(); |
| 205 | } |
| 206 | |
| 207 | TimeUnit OggDemuxer::StartTime(TrackInfo::TrackType aType) { |
| 208 | return OggState(aType).mStartTime.refOr(TimeUnit::Zero()); |
| 209 | } |
| 210 | |
| 211 | RefPtr<OggDemuxer::InitPromise> OggDemuxer::Init() { |
| 212 | if (!mSandbox) { |
| 213 | return InitPromise::CreateAndReject(NS_ERROR_OUT_OF_MEMORY, __func__); |
| 214 | } |
| 215 | const char RLBOX_OGG_RETURN_CODE_SAFE[] = |
| 216 | "Return codes only control whether to early exit. Incorrect return codes " |
| 217 | "will not lead to memory safety issues in the renderer."; |
| 218 | |
| 219 | int ret = sandbox_invoke(*mSandbox, ogg_sync_init,(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_init)>( "ogg_sync_init", reinterpret_cast<void *>(&ogg_sync_init), OggSyncState(TrackInfo::kAudioTrack )) |
| 220 | OggSyncState(TrackInfo::kAudioTrack))(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_init)>( "ogg_sync_init", reinterpret_cast<void *>(&ogg_sync_init), OggSyncState(TrackInfo::kAudioTrack )) |
| 221 | .unverified_safe_because(RLBOX_OGG_RETURN_CODE_SAFE); |
| 222 | if (ret != 0) { |
| 223 | return InitPromise::CreateAndReject(NS_ERROR_OUT_OF_MEMORY, __func__); |
| 224 | } |
| 225 | ret = sandbox_invoke(*mSandbox, ogg_sync_init,(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_init)>( "ogg_sync_init", reinterpret_cast<void *>(&ogg_sync_init), OggSyncState(TrackInfo::kVideoTrack )) |
| 226 | OggSyncState(TrackInfo::kVideoTrack))(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_init)>( "ogg_sync_init", reinterpret_cast<void *>(&ogg_sync_init), OggSyncState(TrackInfo::kVideoTrack )) |
| 227 | .unverified_safe_because(RLBOX_OGG_RETURN_CODE_SAFE); |
| 228 | if (ret != 0) { |
| 229 | return InitPromise::CreateAndReject(NS_ERROR_OUT_OF_MEMORY, __func__); |
| 230 | } |
| 231 | if (ReadMetadata() != NS_OK) { |
| 232 | return InitPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_METADATA_ERR, |
| 233 | __func__); |
| 234 | } |
| 235 | |
| 236 | if (!GetNumberTracks(TrackInfo::kAudioTrack) && |
| 237 | !GetNumberTracks(TrackInfo::kVideoTrack)) { |
| 238 | return InitPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_METADATA_ERR, |
| 239 | __func__); |
| 240 | } |
| 241 | |
| 242 | return InitPromise::CreateAndResolve(NS_OK, __func__); |
| 243 | } |
| 244 | |
| 245 | OggCodecState* OggDemuxer::GetTrackCodecState( |
| 246 | TrackInfo::TrackType aType) const { |
| 247 | switch (aType) { |
| 248 | case TrackInfo::kAudioTrack: |
| 249 | if (mVorbisState) { |
| 250 | return mVorbisState; |
| 251 | } else if (mOpusState) { |
| 252 | return mOpusState; |
| 253 | } else { |
| 254 | return mFlacState; |
| 255 | } |
| 256 | case TrackInfo::kVideoTrack: |
| 257 | return mTheoraState; |
| 258 | default: |
| 259 | return nullptr; |
| 260 | } |
| 261 | } |
| 262 | |
| 263 | TrackInfo::TrackType OggDemuxer::GetCodecStateType( |
| 264 | OggCodecState* aState) const { |
| 265 | switch (aState->GetType()) { |
| 266 | case OggCodecState::TYPE_THEORA: |
| 267 | return TrackInfo::kVideoTrack; |
| 268 | case OggCodecState::TYPE_OPUS: |
| 269 | case OggCodecState::TYPE_VORBIS: |
| 270 | case OggCodecState::TYPE_FLAC: |
| 271 | return TrackInfo::kAudioTrack; |
| 272 | default: |
| 273 | return TrackInfo::kUndefinedTrack; |
| 274 | } |
| 275 | } |
| 276 | |
| 277 | uint32_t OggDemuxer::GetNumberTracks(TrackInfo::TrackType aType) const { |
| 278 | switch (aType) { |
| 279 | case TrackInfo::kAudioTrack: |
| 280 | return HasAudio() ? 1 : 0; |
| 281 | case TrackInfo::kVideoTrack: |
| 282 | return HasVideo() ? 1 : 0; |
| 283 | default: |
| 284 | return 0; |
| 285 | } |
| 286 | } |
| 287 | |
| 288 | UniquePtr<TrackInfo> OggDemuxer::GetTrackInfo(TrackInfo::TrackType aType, |
| 289 | size_t aTrackNumber) const { |
| 290 | switch (aType) { |
| 291 | case TrackInfo::kAudioTrack: |
| 292 | return mInfo.mAudio.Clone(); |
| 293 | case TrackInfo::kVideoTrack: |
| 294 | return mInfo.mVideo.Clone(); |
| 295 | default: |
| 296 | return nullptr; |
| 297 | } |
| 298 | } |
| 299 | |
| 300 | already_AddRefed<MediaTrackDemuxer> OggDemuxer::GetTrackDemuxer( |
| 301 | TrackInfo::TrackType aType, uint32_t aTrackNumber) { |
| 302 | if (GetNumberTracks(aType) <= aTrackNumber) { |
| 303 | return nullptr; |
| 304 | } |
| 305 | RefPtr<OggTrackDemuxer> e = new OggTrackDemuxer(this, aType, aTrackNumber); |
| 306 | DDLINKCHILD("track demuxer", e.get())do { if (DecoderDoctorLogger::IsDDLoggingEnabled()) { DecoderDoctorLogger ::LinkParentAndChild(this, "track demuxer", e.get()); } } while (0); |
| 307 | mDemuxers.AppendElement(e); |
| 308 | |
| 309 | return e.forget(); |
| 310 | } |
| 311 | |
| 312 | nsresult OggDemuxer::Reset(TrackInfo::TrackType aType) { |
| 313 | // Discard any previously buffered packets/pages. |
| 314 | if (mSandbox) { |
| 315 | sandbox_invoke(*mSandbox, ogg_sync_reset, OggSyncState(aType))(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_reset)>( "ogg_sync_reset", reinterpret_cast<void *>(&ogg_sync_reset), OggSyncState(aType)); |
| 316 | } |
| 317 | OggCodecState* trackState = GetTrackCodecState(aType); |
| 318 | if (trackState) { |
| 319 | return trackState->Reset(); |
| 320 | } |
| 321 | OggState(aType).mNeedKeyframe = true; |
| 322 | return NS_OK; |
| 323 | } |
| 324 | |
| 325 | bool OggDemuxer::ReadHeaders(TrackInfo::TrackType aType, |
| 326 | OggCodecState* aState) { |
| 327 | while (!aState->DoneReadingHeaders()) { |
| 328 | DemuxUntilPacketAvailable(aType, aState); |
| 329 | OggPacketPtr packet = aState->PacketOut(); |
| 330 | if (!packet) { |
| 331 | OGG_DEBUG("Ran out of header packets early; deactivating stream %" PRIu32"u", |
| 332 | aState->mSerial); |
| 333 | aState->Deactivate(); |
| 334 | return false; |
| 335 | } |
| 336 | |
| 337 | // Local OggCodecState needs to decode headers in order to process |
| 338 | // packet granulepos -> time mappings, etc. |
| 339 | if (!aState->DecodeHeader(std::move(packet))) { |
| 340 | OGG_DEBUG( |
| 341 | "Failed to decode ogg header packet; deactivating stream %" PRIu32"u", |
| 342 | aState->mSerial); |
| 343 | aState->Deactivate(); |
| 344 | return false; |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | return aState->Init(); |
| 349 | } |
| 350 | |
| 351 | void OggDemuxer::BuildSerialList(nsTArray<uint32_t>& aTracks) { |
| 352 | // Obtaining seek index information for currently active bitstreams. |
| 353 | if (HasVideo()) { |
| 354 | aTracks.AppendElement(mTheoraState->mSerial); |
| 355 | } |
| 356 | if (HasAudio()) { |
| 357 | if (mVorbisState) { |
| 358 | aTracks.AppendElement(mVorbisState->mSerial); |
| 359 | } else if (mOpusState) { |
| 360 | aTracks.AppendElement(mOpusState->mSerial); |
| 361 | } |
| 362 | } |
| 363 | } |
| 364 | |
| 365 | void OggDemuxer::SetupTarget(OggCodecState** aSavedState, |
| 366 | OggCodecState* aNewState) { |
| 367 | if (*aSavedState) { |
| 368 | (*aSavedState)->Reset(); |
| 369 | } |
| 370 | |
| 371 | if (aNewState->GetInfo()->GetAsAudioInfo()) { |
| 372 | mInfo.mAudio = *aNewState->GetInfo()->GetAsAudioInfo(); |
| 373 | } else { |
| 374 | mInfo.mVideo = *aNewState->GetInfo()->GetAsVideoInfo(); |
| 375 | } |
| 376 | *aSavedState = aNewState; |
| 377 | } |
| 378 | |
| 379 | void OggDemuxer::SetupTargetSkeleton() { |
| 380 | // Setup skeleton related information after mVorbisState & mTheroState |
| 381 | // being set (if they exist). |
| 382 | if (mSkeletonState) { |
| 383 | if (!HasAudio() && !HasVideo()) { |
| 384 | // We have a skeleton track, but no audio or video, may as well disable |
| 385 | // the skeleton, we can't do anything useful with this media. |
| 386 | OGG_DEBUG("Deactivating skeleton stream %" PRIu32"u", |
| 387 | mSkeletonState->mSerial); |
| 388 | mSkeletonState->Deactivate(); |
| 389 | } else if (ReadHeaders(TrackInfo::kAudioTrack, mSkeletonState) && |
| 390 | mSkeletonState->HasIndex()) { |
| 391 | // We don't particularly care about which track we are currently using |
| 392 | // as both MediaResource points to the same content. |
| 393 | // Extract the duration info out of the index, so we don't need to seek to |
| 394 | // the end of resource to get it. |
| 395 | nsTArray<uint32_t> tracks; |
| 396 | BuildSerialList(tracks); |
| 397 | TimeUnit duration = TimeUnit::Zero(); |
| 398 | if (NS_SUCCEEDED(mSkeletonState->GetDuration(tracks, duration))((bool)(__builtin_expect(!!(!NS_FAILED_impl(mSkeletonState-> GetDuration(tracks, duration))), 1)))) { |
| 399 | OGG_DEBUG("Got duration from Skeleton index %s", |
| 400 | duration.ToString().get()); |
| 401 | mInfo.mMetadataDuration.emplace(duration); |
| 402 | } |
| 403 | } |
| 404 | } |
| 405 | } |
| 406 | |
| 407 | void OggDemuxer::SetupMediaTracksInfo(const nsTArray<uint32_t>& aSerials) { |
| 408 | // For each serial number |
| 409 | // 1. Retrieve a codecState from mCodecStore by this serial number. |
| 410 | // 2. Retrieve a message field from mMsgFieldStore by this serial number. |
| 411 | // 3. For now, skip if the serial number refers to a non-primary bitstream. |
| 412 | // 4. Setup track and other audio/video related information per different |
| 413 | // types. |
| 414 | for (size_t i = 0; i < aSerials.Length(); i++) { |
| 415 | uint32_t serial = aSerials[i]; |
| 416 | OggCodecState* codecState = mCodecStore.Get(serial); |
| 417 | |
| 418 | MessageField* msgInfo = nullptr; |
| 419 | if (mSkeletonState) { |
| 420 | mSkeletonState->mMsgFieldStore.Get(serial, &msgInfo); |
| 421 | } |
| 422 | |
| 423 | OggCodecState* primeState = nullptr; |
| 424 | switch (codecState->GetType()) { |
| 425 | case OggCodecState::TYPE_THEORA: |
| 426 | primeState = mTheoraState; |
| 427 | break; |
| 428 | case OggCodecState::TYPE_VORBIS: |
| 429 | primeState = mVorbisState; |
| 430 | break; |
| 431 | case OggCodecState::TYPE_OPUS: |
| 432 | primeState = mOpusState; |
| 433 | break; |
| 434 | case OggCodecState::TYPE_FLAC: |
| 435 | primeState = mFlacState; |
| 436 | break; |
| 437 | default: |
| 438 | break; |
| 439 | } |
| 440 | if (primeState && primeState == codecState) { |
| 441 | bool isAudio = primeState->GetInfo()->GetAsAudioInfo(); |
| 442 | if (msgInfo) { |
| 443 | InitTrack( |
| 444 | msgInfo, |
| 445 | isAudio ? static_cast<TrackInfo*>(&mInfo.mAudio) : &mInfo.mVideo, |
| 446 | true); |
| 447 | } |
| 448 | FillTags(isAudio ? static_cast<TrackInfo*>(&mInfo.mAudio) : &mInfo.mVideo, |
| 449 | primeState->GetTags()); |
| 450 | } |
| 451 | } |
| 452 | } |
| 453 | |
| 454 | void OggDemuxer::FillTags(TrackInfo* aInfo, UniquePtr<MetadataTags>&& aTags) { |
| 455 | if (!aTags) { |
| 456 | return; |
| 457 | } |
| 458 | UniquePtr<MetadataTags> tags(std::move(aTags)); |
| 459 | for (const auto& entry : *tags) { |
| 460 | aInfo->mTags.AppendElement(MetadataTag(entry.GetKey(), entry.GetData())); |
| 461 | } |
| 462 | } |
| 463 | |
| 464 | nsresult OggDemuxer::ReadMetadata() { |
| 465 | OGG_DEBUG("OggDemuxer::ReadMetadata called!"); |
| 466 | |
| 467 | // We read packets until all bitstreams have read all their header packets. |
| 468 | // We record the offset of the first non-header page so that we know |
| 469 | // what page to seek to when seeking to the media start. |
| 470 | |
| 471 | // @FIXME we have to read all the header packets on all the streams |
| 472 | // and THEN we can run SetupTarget* |
| 473 | // @fixme fixme |
| 474 | |
| 475 | TrackInfo::TrackType tracks[2] = {TrackInfo::kAudioTrack, |
| 476 | TrackInfo::kVideoTrack}; |
| 477 | |
| 478 | nsTArray<OggCodecState*> bitstreams; |
| 479 | nsTArray<uint32_t> serials; |
| 480 | |
| 481 | for (auto& track : tracks) { |
| 482 | tainted_ogg<ogg_page*> page = mSandbox->malloc_in_sandbox<ogg_page>(); |
| 483 | if (!page) { |
| 484 | return NS_ERROR_OUT_OF_MEMORY; |
| 485 | } |
| 486 | auto clean_page = MakeScopeExit([&] { mSandbox->free_in_sandbox(page); }); |
| 487 | |
| 488 | bool readAllBOS = false; |
| 489 | while (!readAllBOS) { |
| 490 | if (!ReadOggPage(track, page.to_opaque())) { |
| 491 | // Some kind of error... |
| 492 | OGG_DEBUG("OggDemuxer::ReadOggPage failed? leaving ReadMetadata..."); |
| 493 | return NS_ERROR_FAILURE; |
| 494 | } |
| 495 | |
| 496 | uint32_t serial = static_cast<uint32_t>( |
| 497 | sandbox_invoke(*mSandbox, ogg_page_serialno, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_serialno)>( "ogg_page_serialno", reinterpret_cast <void*>(&ogg_page_serialno), page) |
| 498 | .unverified_safe_because(RLBOX_OGG_PAGE_SERIAL_REASON)); |
| 499 | |
| 500 | if (!sandbox_invoke(*mSandbox, ogg_page_bos, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_bos)>( "ogg_page_bos", reinterpret_cast<void* >(&ogg_page_bos), page) |
| 501 | .unverified_safe_because( |
| 502 | "If this value is incorrect, it would mean not all " |
| 503 | "bitstreams are read. This does not affect the memory " |
| 504 | "safety of the renderer.")) { |
| 505 | // We've encountered a non Beginning Of Stream page. No more BOS pages |
| 506 | // can follow in this Ogg segment, so there will be no other bitstreams |
| 507 | // in the Ogg (unless it's invalid). |
| 508 | readAllBOS = true; |
| 509 | } else if (!mCodecStore.Contains(serial)) { |
| 510 | // We've not encountered a stream with this serial number before. Create |
| 511 | // an OggCodecState to demux it, and map that to the OggCodecState |
| 512 | // in mCodecStates. |
| 513 | OggCodecState* const codecState = mCodecStore.Add( |
| 514 | serial, |
| 515 | OggCodecState::Create(mSandbox.get(), page.to_opaque(), serial)); |
| 516 | bitstreams.AppendElement(codecState); |
| 517 | serials.AppendElement(serial); |
| 518 | } |
| 519 | if (NS_FAILED(DemuxOggPage(track, page.to_opaque()))((bool)(__builtin_expect(!!(NS_FAILED_impl(DemuxOggPage(track , page.to_opaque()))), 0)))) { |
| 520 | return NS_ERROR_FAILURE; |
| 521 | } |
| 522 | } |
| 523 | } |
| 524 | |
| 525 | // We've read all BOS pages, so we know the streams contained in the media. |
| 526 | // 1. Find the first encountered Theora/Vorbis/Opus bitstream, and configure |
| 527 | // it as the target A/V bitstream. |
| 528 | // 2. Deactivate the rest of bitstreams for now, until we have MediaInfo |
| 529 | // support multiple track infos. |
| 530 | for (uint32_t i = 0; i < bitstreams.Length(); ++i) { |
| 531 | OggCodecState* s = bitstreams[i]; |
| 532 | if (s) { |
| 533 | if (s->GetType() == OggCodecState::TYPE_THEORA && |
| 534 | ReadHeaders(TrackInfo::kVideoTrack, s)) { |
| 535 | if (!mTheoraState) { |
| 536 | SetupTarget(&mTheoraState, s); |
| 537 | } else { |
| 538 | s->Deactivate(); |
| 539 | } |
| 540 | } else if (s->GetType() == OggCodecState::TYPE_VORBIS && |
| 541 | ReadHeaders(TrackInfo::kAudioTrack, s)) { |
| 542 | if (!mVorbisState) { |
| 543 | SetupTarget(&mVorbisState, s); |
| 544 | } else { |
| 545 | s->Deactivate(); |
| 546 | } |
| 547 | } else if (s->GetType() == OggCodecState::TYPE_OPUS && |
| 548 | ReadHeaders(TrackInfo::kAudioTrack, s)) { |
| 549 | if (mOpusEnabled) { |
| 550 | if (!mOpusState) { |
| 551 | SetupTarget(&mOpusState, s); |
| 552 | } else { |
| 553 | s->Deactivate(); |
| 554 | } |
| 555 | } else { |
| 556 | NS_WARNING(NS_DebugBreak(NS_DEBUG_WARNING, "Opus decoding disabled." " See media.opus.enabled in about:config" , nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 558) |
| 557 | "Opus decoding disabled."NS_DebugBreak(NS_DEBUG_WARNING, "Opus decoding disabled." " See media.opus.enabled in about:config" , nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 558) |
| 558 | " See media.opus.enabled in about:config")NS_DebugBreak(NS_DEBUG_WARNING, "Opus decoding disabled." " See media.opus.enabled in about:config" , nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 558); |
| 559 | } |
| 560 | } else if (s->GetType() == OggCodecState::TYPE_FLAC && |
| 561 | ReadHeaders(TrackInfo::kAudioTrack, s)) { |
| 562 | if (!mFlacState) { |
| 563 | SetupTarget(&mFlacState, s); |
| 564 | } else { |
| 565 | s->Deactivate(); |
| 566 | } |
| 567 | } else if (s->GetType() == OggCodecState::TYPE_SKELETON && |
| 568 | !mSkeletonState) { |
| 569 | mSkeletonState = static_cast<SkeletonState*>(s); |
| 570 | } else { |
| 571 | // Deactivate any non-primary bitstreams. |
| 572 | s->Deactivate(); |
| 573 | } |
| 574 | } |
| 575 | } |
| 576 | |
| 577 | SetupTargetSkeleton(); |
| 578 | SetupMediaTracksInfo(serials); |
| 579 | |
| 580 | if (HasAudio() || HasVideo()) { |
| 581 | TimeUnit startTime = TimeUnit::Invalid(); |
| 582 | FindStartTime(startTime); |
| 583 | if (startTime.IsValid()) { |
| 584 | OGG_DEBUG("Detected stream start time %s", startTime.ToString().get()); |
| 585 | mStartTime.emplace(startTime); |
| 586 | } |
| 587 | |
| 588 | if (mInfo.mMetadataDuration.isNothing() && |
| 589 | Resource(TrackInfo::kAudioTrack)->GetLength() >= 0) { |
| 590 | // We didn't get a duration from the index or a Content-Duration header. |
| 591 | // Seek to the end of file to find the end time. |
| 592 | int64_t length = Resource(TrackInfo::kAudioTrack)->GetLength(); |
| 593 | |
| 594 | MOZ_ASSERT(length > 0, "Must have a content length to get end time")do { static_assert( mozilla::detail::AssertionConditionType< decltype(length > 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(length > 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("length > 0" " (" "Must have a content length to get end time" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 594); AnnotateMozCrashReason("MOZ_ASSERT" "(" "length > 0" ") (" "Must have a content length to get end time" ")"); do { *((volatile int*)__null) = 594; __attribute__((nomerge)) ::abort (); } while (false); } } while (false); |
| 595 | |
| 596 | TimeUnit endTime = RangeEndTime(TrackInfo::kAudioTrack, length); |
| 597 | |
| 598 | if (endTime.IsValid() && endTime.IsPositive()) { |
| 599 | mInfo.mUnadjustedMetadataEndTime.emplace(endTime); |
| 600 | TimeUnit computedDuration = |
| 601 | endTime - mStartTime.refOr(TimeUnit::Zero()); |
| 602 | if (computedDuration.IsPositive()) { |
| 603 | mInfo.mMetadataDuration.emplace(computedDuration); |
| 604 | OGG_DEBUG("Got Ogg duration from seeking to end %s", |
| 605 | computedDuration.ToString().get()); |
| 606 | } else { |
| 607 | OGG_DEBUG("Ignoring incorect start time in metadata"); |
| 608 | mStartTime.reset(); |
| 609 | } |
| 610 | } |
| 611 | } |
| 612 | if (mInfo.mMetadataDuration.isNothing()) { |
| 613 | OGG_DEBUG("Couldn't determine OGG file duration."); |
| 614 | mInfo.mMetadataDuration.emplace(TimeUnit::FromInfinity()); |
| 615 | } |
| 616 | if (HasAudio()) { |
| 617 | mInfo.mAudio.mDuration = mInfo.mMetadataDuration.ref(); |
| 618 | } |
| 619 | if (HasVideo()) { |
| 620 | mInfo.mVideo.mDuration = mInfo.mMetadataDuration.ref(); |
| 621 | } |
| 622 | } else { |
| 623 | OGG_DEBUG("no audio or video tracks"); |
| 624 | return NS_ERROR_FAILURE; |
| 625 | } |
| 626 | |
| 627 | OGG_DEBUG("success?!"); |
| 628 | return NS_OK; |
| 629 | } |
| 630 | |
| 631 | void OggDemuxer::SetChained() { |
| 632 | { |
| 633 | if (mIsChained) { |
| 634 | return; |
| 635 | } |
| 636 | mIsChained = true; |
| 637 | } |
| 638 | if (mOnSeekableEvent) { |
| 639 | mOnSeekableEvent->Notify(); |
| 640 | } |
| 641 | } |
| 642 | |
| 643 | bool OggDemuxer::ReadOggChain(const media::TimeUnit& aLastEndTime) { |
| 644 | bool chained = false; |
| 645 | OpusState* newOpusState = nullptr; |
| 646 | VorbisState* newVorbisState = nullptr; |
| 647 | FlacState* newFlacState = nullptr; |
| 648 | UniquePtr<MetadataTags> tags; |
| 649 | |
| 650 | if (HasVideo() || HasSkeleton() || !HasAudio()) { |
| 651 | return false; |
| 652 | } |
| 653 | |
| 654 | tainted_ogg<ogg_page*> page = mSandbox->malloc_in_sandbox<ogg_page>(); |
| 655 | if (!page) { |
| 656 | return false; |
| 657 | } |
| 658 | auto clean_page = MakeScopeExit([&] { mSandbox->free_in_sandbox(page); }); |
| 659 | if (!ReadOggPage(TrackInfo::kAudioTrack, page.to_opaque()) || |
| 660 | !sandbox_invoke(*mSandbox, ogg_page_bos, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_bos)>( "ogg_page_bos", reinterpret_cast<void* >(&ogg_page_bos), page) |
| 661 | .unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON)) { |
| 662 | // Chaining is only supported for audio only ogg files. |
| 663 | return false; |
| 664 | } |
| 665 | |
| 666 | uint32_t serial = static_cast<uint32_t>( |
| 667 | sandbox_invoke(*mSandbox, ogg_page_serialno, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_serialno)>( "ogg_page_serialno", reinterpret_cast <void*>(&ogg_page_serialno), page) |
| 668 | .unverified_safe_because( |
| 669 | "We are reading a new page with a serial number for the first " |
| 670 | "time and will check if we have seen it before prior to use.")); |
| 671 | if (mCodecStore.Contains(serial)) { |
| 672 | return false; |
| 673 | } |
| 674 | |
| 675 | UniquePtr<OggCodecState> codecState( |
| 676 | OggCodecState::Create(mSandbox.get(), page.to_opaque(), serial)); |
| 677 | if (!codecState) { |
| 678 | return false; |
| 679 | } |
| 680 | |
| 681 | if (mVorbisState && (codecState->GetType() == OggCodecState::TYPE_VORBIS)) { |
| 682 | newVorbisState = static_cast<VorbisState*>(codecState.get()); |
| 683 | } else if (mOpusState && |
| 684 | (codecState->GetType() == OggCodecState::TYPE_OPUS)) { |
| 685 | newOpusState = static_cast<OpusState*>(codecState.get()); |
| 686 | } else if (mFlacState && |
| 687 | (codecState->GetType() == OggCodecState::TYPE_FLAC)) { |
| 688 | newFlacState = static_cast<FlacState*>(codecState.get()); |
| 689 | } else { |
| 690 | return false; |
| 691 | } |
| 692 | |
| 693 | OggCodecState* state; |
| 694 | |
| 695 | mCodecStore.Add(serial, std::move(codecState)); |
| 696 | state = mCodecStore.Get(serial); |
| 697 | |
| 698 | NS_ENSURE_TRUE(state != nullptr, false)do { if ((__builtin_expect(!!(!(state != nullptr)), 0))) { NS_DebugBreak (NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "state != nullptr" ") failed" , nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 698); return false; } } while (false); |
| 699 | |
| 700 | if (NS_FAILED(state->PageIn(page.to_opaque()))((bool)(__builtin_expect(!!(NS_FAILED_impl(state->PageIn(page .to_opaque()))), 0)))) { |
| 701 | return false; |
| 702 | } |
| 703 | |
| 704 | MessageField* msgInfo = nullptr; |
| 705 | if (mSkeletonState) { |
| 706 | mSkeletonState->mMsgFieldStore.Get(serial, &msgInfo); |
| 707 | } |
| 708 | |
| 709 | if ((newVorbisState && ReadHeaders(TrackInfo::kAudioTrack, newVorbisState)) && |
| 710 | (mVorbisState->GetInfo()->GetAsAudioInfo()->mRate == |
| 711 | newVorbisState->GetInfo()->GetAsAudioInfo()->mRate) && |
| 712 | (mVorbisState->GetInfo()->GetAsAudioInfo()->mChannels == |
| 713 | newVorbisState->GetInfo()->GetAsAudioInfo()->mChannels)) { |
| 714 | SetupTarget(&mVorbisState, newVorbisState); |
| 715 | OGG_DEBUG("New vorbis ogg link, serial=%d\n", mVorbisState->mSerial); |
| 716 | |
| 717 | if (msgInfo) { |
| 718 | InitTrack(msgInfo, &mInfo.mAudio, true); |
| 719 | } |
| 720 | |
| 721 | chained = true; |
| 722 | tags = newVorbisState->GetTags(); |
| 723 | } |
| 724 | |
| 725 | if ((newOpusState && ReadHeaders(TrackInfo::kAudioTrack, newOpusState)) && |
| 726 | (mOpusState->GetInfo()->GetAsAudioInfo()->mRate == |
| 727 | newOpusState->GetInfo()->GetAsAudioInfo()->mRate) && |
| 728 | (mOpusState->GetInfo()->GetAsAudioInfo()->mChannels == |
| 729 | newOpusState->GetInfo()->GetAsAudioInfo()->mChannels)) { |
| 730 | SetupTarget(&mOpusState, newOpusState); |
| 731 | |
| 732 | if (msgInfo) { |
| 733 | InitTrack(msgInfo, &mInfo.mAudio, true); |
| 734 | } |
| 735 | |
| 736 | chained = true; |
| 737 | tags = newOpusState->GetTags(); |
| 738 | } |
| 739 | |
| 740 | if ((newFlacState && ReadHeaders(TrackInfo::kAudioTrack, newFlacState)) && |
| 741 | (mFlacState->GetInfo()->GetAsAudioInfo()->mRate == |
| 742 | newFlacState->GetInfo()->GetAsAudioInfo()->mRate) && |
| 743 | (mFlacState->GetInfo()->GetAsAudioInfo()->mChannels == |
| 744 | newFlacState->GetInfo()->GetAsAudioInfo()->mChannels)) { |
| 745 | SetupTarget(&mFlacState, newFlacState); |
| 746 | OGG_DEBUG("New flac ogg link, serial=%d\n", mFlacState->mSerial); |
| 747 | |
| 748 | if (msgInfo) { |
| 749 | InitTrack(msgInfo, &mInfo.mAudio, true); |
| 750 | } |
| 751 | |
| 752 | chained = true; |
| 753 | tags = newFlacState->GetTags(); |
| 754 | } |
| 755 | |
| 756 | if (chained) { |
| 757 | SetChained(); |
| 758 | mInfo.mMediaSeekable = false; |
| 759 | mDecodedAudioDuration += aLastEndTime; |
| 760 | if (mTimedMetadataEvent) { |
| 761 | mTimedMetadataEvent->Notify( |
| 762 | TimedMetadata(mDecodedAudioDuration, std::move(tags), |
| 763 | UniquePtr<MediaInfo>(new MediaInfo(mInfo)))); |
| 764 | } |
| 765 | // Setup a new TrackInfo so that the MediaFormatReader will flush the |
| 766 | // current decoder. |
| 767 | mSharedAudioTrackInfo = |
| 768 | new TrackInfoSharedPtr(mInfo.mAudio, ++sStreamSourceID); |
| 769 | return true; |
| 770 | } |
| 771 | |
| 772 | return false; |
| 773 | } |
| 774 | |
| 775 | OggDemuxer::OggStateContext& OggDemuxer::OggState(TrackInfo::TrackType aType) { |
| 776 | if (aType == TrackInfo::kVideoTrack) { |
| 777 | return mVideoOggState; |
| 778 | } |
| 779 | return mAudioOggState; |
| 780 | } |
| 781 | |
| 782 | tainted_opaque_ogg<ogg_sync_state*> OggDemuxer::OggSyncState( |
| 783 | TrackInfo::TrackType aType) { |
| 784 | return OggState(aType).mOggState.mState; |
| 785 | } |
| 786 | |
| 787 | MediaResourceIndex* OggDemuxer::Resource(TrackInfo::TrackType aType) { |
| 788 | return &OggState(aType).mResource; |
| 789 | } |
| 790 | |
| 791 | MediaResourceIndex* OggDemuxer::CommonResource() { |
| 792 | return &mAudioOggState.mResource; |
| 793 | } |
| 794 | |
| 795 | bool OggDemuxer::ReadOggPage(TrackInfo::TrackType aType, |
| 796 | tainted_opaque_ogg<ogg_page*> aPage) { |
| 797 | int ret = 0; |
| 798 | while ((ret = sandbox_invoke(*mSandbox, ogg_sync_pageseek,(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_pageseek)>( "ogg_sync_pageseek", reinterpret_cast <void*>(&ogg_sync_pageseek), OggSyncState(aType), aPage ) |
| 799 | OggSyncState(aType), aPage)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_pageseek)>( "ogg_sync_pageseek", reinterpret_cast <void*>(&ogg_sync_pageseek), OggSyncState(aType), aPage ) |
| 800 | .unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON)) <= |
| 801 | 0) { |
| 802 | if (ret < 0) { |
| 803 | // Lost page sync, have to skip up to next page. |
| 804 | continue; |
| 805 | } |
| 806 | // Returns a buffer that can be written too |
| 807 | // with the given size. This buffer is stored |
| 808 | // in the ogg synchronisation structure. |
| 809 | const uint32_t MIN_BUFFER_SIZE = 4096; |
| 810 | tainted_ogg<char*> buffer_tainted = sandbox_invoke((*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_buffer)>( "ogg_sync_buffer", reinterpret_cast< void*>(&ogg_sync_buffer), OggSyncState(aType), MIN_BUFFER_SIZE ) |
| 811 | *mSandbox, ogg_sync_buffer, OggSyncState(aType), MIN_BUFFER_SIZE)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_buffer)>( "ogg_sync_buffer", reinterpret_cast< void*>(&ogg_sync_buffer), OggSyncState(aType), MIN_BUFFER_SIZE ); |
| 812 | MOZ_ASSERT(buffer_tainted != nullptr, "ogg_sync_buffer failed")do { static_assert( mozilla::detail::AssertionConditionType< decltype(buffer_tainted != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(buffer_tainted != nullptr))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("buffer_tainted != nullptr" " (" "ogg_sync_buffer failed" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 812); AnnotateMozCrashReason("MOZ_ASSERT" "(" "buffer_tainted != nullptr" ") (" "ogg_sync_buffer failed" ")"); do { *((volatile int*)__null ) = 812; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 813 | |
| 814 | // Read from the resource into the buffer |
| 815 | uint32_t bytesRead = 0; |
| 816 | |
| 817 | char* buffer = buffer_tainted.copy_and_verify_buffer_address( |
| 818 | [](uintptr_t val) { return reinterpret_cast<char*>(val); }, |
| 819 | MIN_BUFFER_SIZE); |
| 820 | |
| 821 | nsresult rv = Resource(aType)->Read(buffer, MIN_BUFFER_SIZE, &bytesRead); |
| 822 | if (NS_FAILED(rv)((bool)(__builtin_expect(!!(NS_FAILED_impl(rv)), 0))) || !bytesRead) { |
| 823 | // End of file or error. |
| 824 | return false; |
| 825 | } |
| 826 | |
| 827 | // Update the synchronisation layer with the number |
| 828 | // of bytes written to the buffer |
| 829 | ret = sandbox_invoke(*mSandbox, ogg_sync_wrote, OggSyncState(aType),(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_wrote)>( "ogg_sync_wrote", reinterpret_cast<void *>(&ogg_sync_wrote), OggSyncState(aType), bytesRead) |
| 830 | bytesRead)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_wrote)>( "ogg_sync_wrote", reinterpret_cast<void *>(&ogg_sync_wrote), OggSyncState(aType), bytesRead) |
| 831 | .unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON); |
| 832 | NS_ENSURE_TRUE(ret == 0, false)do { if ((__builtin_expect(!!(!(ret == 0)), 0))) { NS_DebugBreak (NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "ret == 0" ") failed", nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 832); return false; } } while (false); |
| 833 | } |
| 834 | |
| 835 | return true; |
| 836 | } |
| 837 | |
| 838 | nsresult OggDemuxer::DemuxOggPage(TrackInfo::TrackType aType, |
| 839 | tainted_opaque_ogg<ogg_page*> aPage) { |
| 840 | tainted_ogg<int> serial = sandbox_invoke(*mSandbox, ogg_page_serialno, aPage)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_serialno)>( "ogg_page_serialno", reinterpret_cast <void*>(&ogg_page_serialno), aPage); |
| 841 | OggCodecState* codecState = mCodecStore.Get(static_cast<uint32_t>( |
| 842 | serial.unverified_safe_because(RLBOX_OGG_PAGE_SERIAL_REASON))); |
| 843 | if (codecState == nullptr) { |
| 844 | OGG_DEBUG("encountered packet for unrecognized codecState"); |
| 845 | return NS_ERROR_FAILURE; |
| 846 | } |
| 847 | if (GetCodecStateType(codecState) != aType && |
| 848 | codecState->GetType() != OggCodecState::TYPE_SKELETON) { |
| 849 | // Not a page we're interested in. |
| 850 | return NS_OK; |
| 851 | } |
| 852 | if (NS_FAILED(codecState->PageIn(aPage))((bool)(__builtin_expect(!!(NS_FAILED_impl(codecState->PageIn (aPage))), 0)))) { |
| 853 | OGG_DEBUG("codecState->PageIn failed"); |
| 854 | return NS_ERROR_FAILURE; |
| 855 | } |
| 856 | return NS_OK; |
| 857 | } |
| 858 | |
| 859 | bool OggDemuxer::IsSeekable() const { return !mIsChained; } |
| 860 | |
| 861 | UniquePtr<EncryptionInfo> OggDemuxer::GetCrypto() { return nullptr; } |
| 862 | |
| 863 | ogg_packet* OggDemuxer::GetNextPacket(TrackInfo::TrackType aType) { |
| 864 | OggCodecState* state = GetTrackCodecState(aType); |
| 865 | ogg_packet* packet = nullptr; |
| 866 | OggStateContext& context = OggState(aType); |
| 867 | |
| 868 | while (true) { |
| 869 | if (packet) { |
| 870 | Unused << state->PacketOut(); |
| 871 | } |
| 872 | DemuxUntilPacketAvailable(aType, state); |
| 873 | |
| 874 | packet = state->PacketPeek(); |
| 875 | if (!packet) { |
| 876 | break; |
| 877 | } |
| 878 | if (state->IsHeader(packet)) { |
| 879 | continue; |
| 880 | } |
| 881 | if (context.mNeedKeyframe && !state->IsKeyframe(packet)) { |
| 882 | continue; |
| 883 | } |
| 884 | context.mNeedKeyframe = false; |
| 885 | break; |
| 886 | } |
| 887 | |
| 888 | return packet; |
| 889 | } |
| 890 | |
| 891 | void OggDemuxer::DemuxUntilPacketAvailable(TrackInfo::TrackType aType, |
| 892 | OggCodecState* aState) { |
| 893 | while (!aState->IsPacketReady()) { |
| 894 | OGG_DEBUG("no packet yet, reading some more"); |
| 895 | tainted_ogg<ogg_page*> page = mSandbox->malloc_in_sandbox<ogg_page>(); |
| 896 | MOZ_RELEASE_ASSERT(page != nullptr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(page != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(page != nullptr))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("page != nullptr" , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 896); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "page != nullptr" ")"); do { *((volatile int*)__null) = 896; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 897 | auto clean_page = MakeScopeExit([&] { mSandbox->free_in_sandbox(page); }); |
| 898 | if (!ReadOggPage(aType, page.to_opaque())) { |
| 899 | OGG_DEBUG("no more pages to read in resource?"); |
| 900 | return; |
| 901 | } |
| 902 | DemuxOggPage(aType, page.to_opaque()); |
| 903 | } |
| 904 | } |
| 905 | |
| 906 | TimeIntervals OggDemuxer::GetBuffered(TrackInfo::TrackType aType) { |
| 907 | if (!HaveStartTime(aType)) { |
| 908 | return TimeIntervals(); |
| 909 | } |
| 910 | if (mIsChained) { |
| 911 | return TimeIntervals::Invalid(); |
| 912 | } |
| 913 | TimeIntervals buffered; |
| 914 | // HasAudio and HasVideo are not used here as they take a lock and cause |
| 915 | // a deadlock. Accessing mInfo doesn't require a lock - it doesn't change |
| 916 | // after metadata is read. |
| 917 | if (!mInfo.HasValidMedia()) { |
| 918 | // No need to search through the file if there are no audio or video tracks |
| 919 | return buffered; |
| 920 | } |
| 921 | |
| 922 | AutoPinned<MediaResource> resource(Resource(aType)->GetResource()); |
| 923 | MediaByteRangeSet ranges; |
| 924 | nsresult res = resource->GetCachedRanges(ranges); |
| 925 | NS_ENSURE_SUCCESS(res, TimeIntervals::Invalid())do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "TimeIntervals::Invalid()" , static_cast<uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 925); return TimeIntervals::Invalid(); } } while (false); |
| 926 | |
| 927 | const char time_interval_reason[] = |
| 928 | "Even if this computation is incorrect due to the reliance on tainted " |
| 929 | "values, only the search for the time interval or the time interval " |
| 930 | "returned will be affected. However this will not result in a memory " |
| 931 | "safety vulnerabilty in the Firefox renderer."; |
| 932 | |
| 933 | // Traverse across the buffered byte ranges, determining the time ranges |
| 934 | // they contain. MediaResource::GetNextCachedData(offset) returns -1 when |
| 935 | // offset is after the end of the media resource, or there's no more cached |
| 936 | // data after the offset. This loop will run until we've checked every |
| 937 | // buffered range in the media, in increasing order of offset. |
| 938 | nsAutoOggSyncState sync(mSandbox.get()); |
| 939 | for (uint32_t index = 0; index < ranges.Length(); index++) { |
| 940 | // Ensure the offsets are after the header pages. |
| 941 | int64_t startOffset = ranges[index].mStart; |
| 942 | int64_t endOffset = ranges[index].mEnd; |
| 943 | |
| 944 | // Because the granulepos time is actually the end time of the page, |
| 945 | // we special-case (startOffset == 0) so that the first |
| 946 | // buffered range always appears to be buffered from the media start |
| 947 | // time, rather than from the end-time of the first page. |
| 948 | TimeUnit startTime = (startOffset == 0) ? StartTime() : TimeUnit::Invalid(); |
| 949 | |
| 950 | // Find the start time of the range. Read pages until we find one with a |
| 951 | // granulepos which we can convert into a timestamp to use as the time of |
| 952 | // the start of the buffered range. |
| 953 | sandbox_invoke(*mSandbox, ogg_sync_reset, sync.mState)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_reset)>( "ogg_sync_reset", reinterpret_cast<void *>(&ogg_sync_reset), sync.mState); |
| 954 | tainted_ogg<ogg_page*> page = mSandbox->malloc_in_sandbox<ogg_page>(); |
| 955 | if (!page) { |
| 956 | return TimeIntervals::Invalid(); |
| 957 | } |
| 958 | auto clean_page = MakeScopeExit([&] { mSandbox->free_in_sandbox(page); }); |
| 959 | |
| 960 | while (!startTime.IsValid()) { |
| 961 | int32_t discard; |
| 962 | PageSyncResult pageSyncResult = |
| 963 | PageSync(mSandbox.get(), Resource(aType), sync.mState, true, |
| 964 | startOffset, endOffset, page, discard); |
| 965 | if (pageSyncResult == PAGE_SYNC_ERROR) { |
| 966 | return TimeIntervals::Invalid(); |
| 967 | } |
| 968 | if (pageSyncResult == PAGE_SYNC_END_OF_RANGE) { |
| 969 | // Hit the end of range without reading a page, give up trying to |
| 970 | // find a start time for this buffered range, skip onto the next one. |
| 971 | break; |
| 972 | } |
| 973 | |
| 974 | int64_t granulepos = sandbox_invoke(*mSandbox, ogg_page_granulepos, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_granulepos)>( "ogg_page_granulepos", reinterpret_cast <void*>(&ogg_page_granulepos), page) |
| 975 | .unverified_safe_because(time_interval_reason); |
| 976 | if (granulepos == -1) { |
| 977 | // Page doesn't have an end time, advance to the next page |
| 978 | // until we find one. |
| 979 | |
| 980 | bool failedPageLenVerify = false; |
| 981 | // Page length should be under 64Kb according to |
| 982 | // https://xiph.org/ogg/doc/libogg/ogg_page.html |
| 983 | long pageLength = |
| 984 | CopyAndVerifyOrFail(page->header_len + page->body_len, |
| 985 | val <= 64 * 1024, &failedPageLenVerify); |
| 986 | if (failedPageLenVerify) { |
| 987 | return TimeIntervals::Invalid(); |
| 988 | } |
| 989 | |
| 990 | startOffset += pageLength; |
| 991 | continue; |
| 992 | } |
| 993 | |
| 994 | tainted_ogg<uint32_t> serial = rlbox::sandbox_static_cast<uint32_t>( |
| 995 | sandbox_invoke(*mSandbox, ogg_page_serialno, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_serialno)>( "ogg_page_serialno", reinterpret_cast <void*>(&ogg_page_serialno), page)); |
| 996 | if (aType == TrackInfo::kAudioTrack && mVorbisState && |
| 997 | (serial == mVorbisState->mSerial) |
| 998 | .unverified_safe_because(time_interval_reason)) { |
| 999 | startTime = mVorbisState->Time(granulepos); |
| 1000 | MOZ_ASSERT(startTime.IsPositive(), "Must have positive start time")do { static_assert( mozilla::detail::AssertionConditionType< decltype(startTime.IsPositive())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(startTime.IsPositive()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("startTime.IsPositive()" " (" "Must have positive start time" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1000); AnnotateMozCrashReason("MOZ_ASSERT" "(" "startTime.IsPositive()" ") (" "Must have positive start time" ")"); do { *((volatile int*)__null) = 1000; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 1001 | } else if (aType == TrackInfo::kAudioTrack && mOpusState && |
| 1002 | (serial == mOpusState->mSerial) |
| 1003 | .unverified_safe_because(time_interval_reason)) { |
| 1004 | startTime = mOpusState->Time(granulepos); |
| 1005 | MOZ_ASSERT(startTime.IsPositive(), "Must have positive start time")do { static_assert( mozilla::detail::AssertionConditionType< decltype(startTime.IsPositive())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(startTime.IsPositive()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("startTime.IsPositive()" " (" "Must have positive start time" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1005); AnnotateMozCrashReason("MOZ_ASSERT" "(" "startTime.IsPositive()" ") (" "Must have positive start time" ")"); do { *((volatile int*)__null) = 1005; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 1006 | } else if (aType == TrackInfo::kAudioTrack && mFlacState && |
| 1007 | (serial == mFlacState->mSerial) |
| 1008 | .unverified_safe_because(time_interval_reason)) { |
| 1009 | startTime = mFlacState->Time(granulepos); |
| 1010 | MOZ_ASSERT(startTime.IsPositive(), "Must have positive start time")do { static_assert( mozilla::detail::AssertionConditionType< decltype(startTime.IsPositive())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(startTime.IsPositive()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("startTime.IsPositive()" " (" "Must have positive start time" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1010); AnnotateMozCrashReason("MOZ_ASSERT" "(" "startTime.IsPositive()" ") (" "Must have positive start time" ")"); do { *((volatile int*)__null) = 1010; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 1011 | } else if (aType == TrackInfo::kVideoTrack && mTheoraState && |
| 1012 | (serial == mTheoraState->mSerial) |
| 1013 | .unverified_safe_because(time_interval_reason)) { |
| 1014 | startTime = mTheoraState->Time(granulepos); |
| 1015 | MOZ_ASSERT(startTime.IsPositive(), "Must have positive start time")do { static_assert( mozilla::detail::AssertionConditionType< decltype(startTime.IsPositive())>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(startTime.IsPositive()))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("startTime.IsPositive()" " (" "Must have positive start time" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1015); AnnotateMozCrashReason("MOZ_ASSERT" "(" "startTime.IsPositive()" ") (" "Must have positive start time" ")"); do { *((volatile int*)__null) = 1015; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 1016 | } else if (mCodecStore.Contains( |
| 1017 | serial.unverified_safe_because(time_interval_reason))) { |
| 1018 | // Stream is not the theora or vorbis stream we're playing, |
| 1019 | // but is one that we have header data for. |
| 1020 | |
| 1021 | bool failedPageLenVerify = false; |
| 1022 | // Page length should be under 64Kb according to |
| 1023 | // https://xiph.org/ogg/doc/libogg/ogg_page.html |
| 1024 | long pageLength = |
| 1025 | CopyAndVerifyOrFail(page->header_len + page->body_len, |
| 1026 | val <= 64 * 1024, &failedPageLenVerify); |
| 1027 | if (failedPageLenVerify) { |
| 1028 | return TimeIntervals::Invalid(); |
| 1029 | } |
| 1030 | |
| 1031 | startOffset += pageLength; |
| 1032 | continue; |
| 1033 | } else { |
| 1034 | // Page is for a stream we don't know about (possibly a chained |
| 1035 | // ogg), return OK to abort the finding any further ranges. This |
| 1036 | // prevents us searching through the rest of the media when we |
| 1037 | // may not be able to extract timestamps from it. |
| 1038 | SetChained(); |
| 1039 | return buffered; |
| 1040 | } |
| 1041 | } |
| 1042 | |
| 1043 | if (startTime.IsValid()) { |
| 1044 | // We were able to find a start time for that range, see if we can |
| 1045 | // find an end time. |
| 1046 | TimeUnit endTime = RangeEndTime(aType, startOffset, endOffset, true); |
| 1047 | if (endTime.IsValid() && endTime > startTime) { |
| 1048 | buffered += |
| 1049 | TimeInterval(startTime - StartTime(), endTime - StartTime()); |
| 1050 | } |
| 1051 | } |
| 1052 | } |
| 1053 | |
| 1054 | return buffered; |
| 1055 | } |
| 1056 | |
| 1057 | void OggDemuxer::FindStartTime(TimeUnit& aOutStartTime) { |
| 1058 | // Extract the start times of the bitstreams in order to calculate |
| 1059 | // the duration. |
| 1060 | TimeUnit videoStartTime = TimeUnit::FromInfinity(); |
| 1061 | TimeUnit audioStartTime = TimeUnit::FromInfinity(); |
| 1062 | |
| 1063 | if (HasVideo()) { |
| 1064 | FindStartTime(TrackInfo::kVideoTrack, videoStartTime); |
| 1065 | if (!videoStartTime.IsPosInf() && videoStartTime.IsValid()) { |
| 1066 | OGG_DEBUG("OggDemuxer::FindStartTime() video=%s", |
| 1067 | videoStartTime.ToString().get()); |
| 1068 | mVideoOggState.mStartTime = Some(videoStartTime); |
| 1069 | } |
| 1070 | } |
| 1071 | if (HasAudio()) { |
| 1072 | FindStartTime(TrackInfo::kAudioTrack, audioStartTime); |
| 1073 | if (!audioStartTime.IsPosInf() && audioStartTime.IsValid()) { |
| 1074 | OGG_DEBUG("OggDemuxer::FindStartTime() audio=%s", |
| 1075 | audioStartTime.ToString().get()); |
| 1076 | mAudioOggState.mStartTime = Some(audioStartTime); |
| 1077 | } |
| 1078 | } |
| 1079 | |
| 1080 | TimeUnit minStartTime; |
| 1081 | if (videoStartTime.IsValid() && audioStartTime.IsValid()) { |
| 1082 | minStartTime = std::min(videoStartTime, audioStartTime); |
| 1083 | } else if (videoStartTime.IsValid()) { |
| 1084 | minStartTime = videoStartTime; |
| 1085 | } else if (audioStartTime.IsValid()) { |
| 1086 | minStartTime = audioStartTime; |
| 1087 | } |
| 1088 | |
| 1089 | if (!minStartTime.IsPosInf()) { |
| 1090 | aOutStartTime = minStartTime; |
| 1091 | } |
| 1092 | } |
| 1093 | |
| 1094 | void OggDemuxer::FindStartTime(TrackInfo::TrackType aType, |
| 1095 | TimeUnit& aOutStartTime) { |
| 1096 | TimeUnit startTime = TimeUnit::FromInfinity(); |
| 1097 | |
| 1098 | OggCodecState* state = GetTrackCodecState(aType); |
| 1099 | ogg_packet* pkt = GetNextPacket(aType); |
| 1100 | if (pkt) { |
| 1101 | startTime = state->PacketStartTime(pkt); |
| 1102 | } |
| 1103 | |
| 1104 | if (!startTime.IsInfinite()) { |
| 1105 | aOutStartTime = startTime; |
| 1106 | } |
| 1107 | } |
| 1108 | |
| 1109 | nsresult OggDemuxer::SeekInternal(TrackInfo::TrackType aType, |
| 1110 | const TimeUnit& aTarget) { |
| 1111 | OGG_DEBUG("About to seek to %s", aTarget.ToString().get()); |
| 1112 | nsresult res; |
| 1113 | TimeUnit adjustedTarget = aTarget; |
| 1114 | TimeUnit startTime = StartTime(aType); |
| 1115 | TimeUnit endTime = |
| 1116 | mInfo.mMetadataDuration.valueOr(TimeUnit::Zero()) + startTime; |
| 1117 | if (aType == TrackInfo::kAudioTrack && mOpusState) { |
| 1118 | adjustedTarget = std::max(startTime, aTarget - OGG_SEEK_OPUS_PREROLL); |
| 1119 | } |
| 1120 | |
| 1121 | if (!HaveStartTime(aType) || adjustedTarget == startTime) { |
| 1122 | // We've seeked to the media start or we can't seek. |
| 1123 | // Just seek to the offset of the first content page. |
| 1124 | res = Resource(aType)->Seek(nsISeekableStream::NS_SEEK_SET, 0); |
| 1125 | NS_ENSURE_SUCCESS(res, res)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "res", static_cast<uint32_t >(__rv), name ? " (" : "", name ? name : "", name ? ")" : "" ); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1125); return res; } } while (false); |
| 1126 | |
| 1127 | res = Reset(aType); |
| 1128 | NS_ENSURE_SUCCESS(res, res)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "res", static_cast<uint32_t >(__rv), name ? " (" : "", name ? name : "", name ? ")" : "" ); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1128); return res; } } while (false); |
| 1129 | } else { |
| 1130 | // TODO: This may seek back unnecessarily far in the video, but we don't |
| 1131 | // have a way of asking Skeleton to seek to a different target for each |
| 1132 | // stream yet. Using adjustedTarget here is at least correct, if slow. |
| 1133 | IndexedSeekResult sres = SeekToKeyframeUsingIndex(aType, adjustedTarget); |
| 1134 | NS_ENSURE_TRUE(sres != SEEK_FATAL_ERROR, NS_ERROR_FAILURE)do { if ((__builtin_expect(!!(!(sres != SEEK_FATAL_ERROR)), 0 ))) { NS_DebugBreak(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "sres != SEEK_FATAL_ERROR" ") failed", nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1134); return NS_ERROR_FAILURE; } } while (false); |
| 1135 | if (sres == SEEK_INDEX_FAIL) { |
| 1136 | // No index or other non-fatal index-related failure. Try to seek |
| 1137 | // using a bisection search. Determine the already downloaded data |
| 1138 | // in the media cache, so we can try to seek in the cached data first. |
| 1139 | AutoTArray<SeekRange, 16> ranges; |
| 1140 | res = GetSeekRanges(aType, ranges); |
| 1141 | NS_ENSURE_SUCCESS(res, res)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "res", static_cast<uint32_t >(__rv), name ? " (" : "", name ? name : "", name ? ")" : "" ); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1141); return res; } } while (false); |
| 1142 | |
| 1143 | // Figure out if the seek target lies in a buffered range. |
| 1144 | SeekRange r = |
| 1145 | SelectSeekRange(aType, ranges, aTarget, startTime, endTime, true); |
| 1146 | |
| 1147 | if (!r.IsNull()) { |
| 1148 | // We know the buffered range in which the seek target lies, do a |
| 1149 | // bisection search in that buffered range. |
| 1150 | res = SeekInBufferedRange(aType, aTarget, adjustedTarget, startTime, |
| 1151 | endTime, ranges, r); |
| 1152 | NS_ENSURE_SUCCESS(res, res)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "res", static_cast<uint32_t >(__rv), name ? " (" : "", name ? name : "", name ? ")" : "" ); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1152); return res; } } while (false); |
| 1153 | } else { |
| 1154 | // The target doesn't lie in a buffered range. Perform a bisection |
| 1155 | // search over the whole media, using the known buffered ranges to |
| 1156 | // reduce the search space. |
| 1157 | res = SeekInUnbuffered(aType, aTarget, startTime, endTime, ranges); |
| 1158 | NS_ENSURE_SUCCESS(res, res)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "res", static_cast<uint32_t >(__rv), name ? " (" : "", name ? name : "", name ? ")" : "" ); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1158); return res; } } while (false); |
| 1159 | } |
| 1160 | } |
| 1161 | } |
| 1162 | |
| 1163 | // Demux forwards until we find the first keyframe prior the target. |
| 1164 | // there may be non-keyframes in the page before the keyframe. |
| 1165 | // Additionally, we may have seeked to the first page referenced by the |
| 1166 | // page index which may be quite far off the target. |
| 1167 | // When doing fastSeek we display the first frame after the seek, so |
| 1168 | // we need to advance the decode to the keyframe otherwise we'll get |
| 1169 | // visual artifacts in the first frame output after the seek. |
| 1170 | OggCodecState* state = GetTrackCodecState(aType); |
| 1171 | OggPacketQueue tempPackets; |
| 1172 | bool foundKeyframe = false; |
| 1173 | while (true) { |
| 1174 | DemuxUntilPacketAvailable(aType, state); |
| 1175 | ogg_packet* packet = state->PacketPeek(); |
| 1176 | if (packet == nullptr) { |
| 1177 | OGG_DEBUG("End of stream reached before keyframe found in indexed seek"); |
| 1178 | break; |
| 1179 | } |
| 1180 | // Skip any header packet, this can be the case when looping and not parsing |
| 1181 | // the headers again. |
| 1182 | if (state->IsHeader(packet)) { |
| 1183 | OggPacketPtr drop(state->PacketOut()); |
| 1184 | continue; |
| 1185 | } |
| 1186 | TimeUnit startTstamp = state->PacketStartTime(packet); |
| 1187 | if (!startTstamp.IsValid()) { |
| 1188 | OGG_DEBUG("Invalid tstamp on packet %p (granulepos: %" PRId64"l" "d" ")", packet, |
| 1189 | packet->granulepos); |
| 1190 | } |
| 1191 | if (foundKeyframe && startTstamp.IsValid() && |
| 1192 | startTstamp > adjustedTarget) { |
| 1193 | break; |
| 1194 | } |
| 1195 | if (state->IsKeyframe(packet)) { |
| 1196 | OGG_DEBUG("keyframe found after seeking at %s", |
| 1197 | startTstamp.ToString().get()); |
| 1198 | tempPackets.Erase(); |
| 1199 | foundKeyframe = true; |
| 1200 | } |
| 1201 | if (foundKeyframe && startTstamp.IsValid() && |
| 1202 | startTstamp == adjustedTarget) { |
| 1203 | break; |
| 1204 | } |
| 1205 | if (foundKeyframe) { |
| 1206 | tempPackets.Append(state->PacketOut()); |
| 1207 | } else { |
| 1208 | // Discard video packets before the first keyframe. |
| 1209 | Unused << state->PacketOut(); |
| 1210 | } |
| 1211 | } |
| 1212 | // Re-add all packet into the codec state in order. |
| 1213 | state->PushFront(std::move(tempPackets)); |
| 1214 | |
| 1215 | return NS_OK; |
| 1216 | } |
| 1217 | |
| 1218 | OggDemuxer::IndexedSeekResult OggDemuxer::RollbackIndexedSeek( |
| 1219 | TrackInfo::TrackType aType, int64_t aOffset) { |
| 1220 | if (mSkeletonState) { |
| 1221 | mSkeletonState->Deactivate(); |
| 1222 | } |
| 1223 | nsresult res = Resource(aType)->Seek(nsISeekableStream::NS_SEEK_SET, aOffset); |
| 1224 | NS_ENSURE_SUCCESS(res, SEEK_FATAL_ERROR)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "SEEK_FATAL_ERROR", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1224); return SEEK_FATAL_ERROR; } } while (false); |
| 1225 | return SEEK_INDEX_FAIL; |
| 1226 | } |
| 1227 | |
| 1228 | OggDemuxer::IndexedSeekResult OggDemuxer::SeekToKeyframeUsingIndex( |
| 1229 | TrackInfo::TrackType aType, const TimeUnit& aTarget) { |
| 1230 | if (!HasSkeleton() || !mSkeletonState->HasIndex()) { |
| 1231 | return SEEK_INDEX_FAIL; |
| 1232 | } |
| 1233 | // We have an index from the Skeleton track, try to use it to seek. |
| 1234 | AutoTArray<uint32_t, 2> tracks; |
| 1235 | BuildSerialList(tracks); |
| 1236 | SkeletonState::nsSeekTarget keyframe; |
| 1237 | if (NS_FAILED(mSkeletonState->IndexedSeekTarget(aTarget, tracks, keyframe))((bool)(__builtin_expect(!!(NS_FAILED_impl(mSkeletonState-> IndexedSeekTarget(aTarget, tracks, keyframe))), 0)))) { |
| 1238 | // Could not locate a keypoint for the target in the index. |
| 1239 | return SEEK_INDEX_FAIL; |
| 1240 | } |
| 1241 | |
| 1242 | // Remember original resource read cursor position so we can rollback on |
| 1243 | // failure. |
| 1244 | int64_t tell = Resource(aType)->Tell(); |
| 1245 | |
| 1246 | // Seek to the keypoint returned by the index. |
| 1247 | if (keyframe.mKeyPoint.mOffset > Resource(aType)->GetLength() || |
| 1248 | keyframe.mKeyPoint.mOffset < 0) { |
| 1249 | // Index must be invalid. |
| 1250 | return RollbackIndexedSeek(aType, tell); |
| 1251 | } |
| 1252 | OGG_DEBUG("Seeking using index to keyframe at offset %" PRId64"l" "d" "\n", |
| 1253 | keyframe.mKeyPoint.mOffset); |
| 1254 | nsresult res = Resource(aType)->Seek(nsISeekableStream::NS_SEEK_SET, |
| 1255 | keyframe.mKeyPoint.mOffset); |
| 1256 | NS_ENSURE_SUCCESS(res, SEEK_FATAL_ERROR)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "SEEK_FATAL_ERROR", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1256); return SEEK_FATAL_ERROR; } } while (false); |
| 1257 | |
| 1258 | // We've moved the read set, so reset decode. |
| 1259 | res = Reset(aType); |
| 1260 | NS_ENSURE_SUCCESS(res, SEEK_FATAL_ERROR)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "SEEK_FATAL_ERROR", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1260); return SEEK_FATAL_ERROR; } } while (false); |
| 1261 | |
| 1262 | // Check that the page the index thinks is exactly here is actually exactly |
| 1263 | // here. If not, the index is invalid. |
| 1264 | tainted_ogg<ogg_page*> page = mSandbox->malloc_in_sandbox<ogg_page>(); |
| 1265 | if (!page) { |
| 1266 | return SEEK_INDEX_FAIL; |
| 1267 | } |
| 1268 | auto clean_page = MakeScopeExit([&] { mSandbox->free_in_sandbox(page); }); |
| 1269 | int skippedBytes = 0; |
| 1270 | PageSyncResult syncres = |
| 1271 | PageSync(mSandbox.get(), Resource(aType), OggSyncState(aType), false, |
| 1272 | keyframe.mKeyPoint.mOffset, Resource(aType)->GetLength(), page, |
| 1273 | skippedBytes); |
| 1274 | NS_ENSURE_TRUE(syncres != PAGE_SYNC_ERROR, SEEK_FATAL_ERROR)do { if ((__builtin_expect(!!(!(syncres != PAGE_SYNC_ERROR)), 0))) { NS_DebugBreak(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "syncres != PAGE_SYNC_ERROR" ") failed", nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1274); return SEEK_FATAL_ERROR; } } while (false); |
| 1275 | if (syncres != PAGE_SYNC_OK || skippedBytes != 0) { |
| 1276 | OGG_DEBUG( |
| 1277 | "Indexed-seek failure: Ogg Skeleton Index is invalid " |
| 1278 | "or sync error after seek"); |
| 1279 | return RollbackIndexedSeek(aType, tell); |
| 1280 | } |
| 1281 | uint32_t serial = static_cast<uint32_t>( |
| 1282 | sandbox_invoke(*mSandbox, ogg_page_serialno, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_serialno)>( "ogg_page_serialno", reinterpret_cast <void*>(&ogg_page_serialno), page) |
| 1283 | .unverified_safe_because( |
| 1284 | "Serial is only used to locate the correct page. If the serial " |
| 1285 | "is incorrect the the renderer would just fail to seek with an " |
| 1286 | "error code. This would not lead to any memory safety bugs.")); |
| 1287 | if (serial != keyframe.mSerial) { |
| 1288 | // Serialno of page at offset isn't what the index told us to expect. |
| 1289 | // Assume the index is invalid. |
| 1290 | return RollbackIndexedSeek(aType, tell); |
| 1291 | } |
| 1292 | OggCodecState* codecState = mCodecStore.Get(serial); |
| 1293 | if (codecState && codecState->mActive && |
| 1294 | sandbox_invoke(*mSandbox, ogg_stream_pagein, codecState->mState, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_stream_pagein)>( "ogg_stream_pagein", reinterpret_cast <void*>(&ogg_stream_pagein), codecState->mState, page) |
| 1295 | .unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON) != 0) { |
| 1296 | // Couldn't insert page into the ogg resource, or somehow the resource |
| 1297 | // is no longer active. |
| 1298 | return RollbackIndexedSeek(aType, tell); |
| 1299 | } |
| 1300 | return SEEK_OK; |
| 1301 | } |
| 1302 | |
| 1303 | // Reads a page from the media resource. |
| 1304 | OggDemuxer::PageSyncResult OggDemuxer::PageSync( |
| 1305 | rlbox_sandbox_ogg* aSandbox, MediaResourceIndex* aResource, |
| 1306 | tainted_opaque_ogg<ogg_sync_state*> aState, bool aCachedDataOnly, |
| 1307 | int64_t aOffset, int64_t aEndOffset, tainted_ogg<ogg_page*> aPage, |
| 1308 | int& aSkippedBytes) { |
| 1309 | aSkippedBytes = 0; |
| 1310 | // Sync to the next page. |
| 1311 | tainted_ogg<int> ret = 0; |
| 1312 | uint32_t bytesRead = 0; |
| 1313 | int64_t readHead = aOffset; |
| 1314 | while (ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON) <= 0) { |
| 1315 | tainted_ogg<long> seek_ret = |
| 1316 | sandbox_invoke(*aSandbox, ogg_sync_pageseek, aState, aPage)(*aSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_pageseek)>( "ogg_sync_pageseek", reinterpret_cast <void*>(&ogg_sync_pageseek), aState, aPage); |
| 1317 | |
| 1318 | // We aren't really verifying the value of seek_ret below. |
| 1319 | // We are merely ensuring that it won't overflow an integer. |
| 1320 | // However we are assigning the value to ret which is marked tainted, so |
| 1321 | // this is fine. |
| 1322 | bool failedVerify = false; |
| 1323 | CheckedInt<int> checker; |
| 1324 | ret = CopyAndVerifyOrFail( |
| 1325 | seek_ret, (static_cast<void>(checker = val), checker.isValid()), |
| 1326 | &failedVerify); |
| 1327 | if (failedVerify) { |
| 1328 | return PAGE_SYNC_ERROR; |
| 1329 | } |
| 1330 | |
| 1331 | if (ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON) == 0) { |
| 1332 | const int page_step_val = PAGE_STEP; |
| 1333 | tainted_ogg<char*> buffer_tainted = |
| 1334 | sandbox_invoke(*aSandbox, ogg_sync_buffer, aState, page_step_val)(*aSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_buffer)>( "ogg_sync_buffer", reinterpret_cast< void*>(&ogg_sync_buffer), aState, page_step_val); |
| 1335 | MOZ_ASSERT(buffer_tainted != nullptr, "Must have a buffer")do { static_assert( mozilla::detail::AssertionConditionType< decltype(buffer_tainted != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(buffer_tainted != nullptr))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("buffer_tainted != nullptr" " (" "Must have a buffer" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1335); AnnotateMozCrashReason("MOZ_ASSERT" "(" "buffer_tainted != nullptr" ") (" "Must have a buffer" ")"); do { *((volatile int*)__null ) = 1335; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); |
| 1336 | |
| 1337 | // Read from the file into the buffer |
| 1338 | int64_t bytesToRead = |
| 1339 | std::min(static_cast<int64_t>(PAGE_STEP), aEndOffset - readHead); |
| 1340 | MOZ_ASSERT(bytesToRead <= UINT32_MAX, "bytesToRead range check")do { static_assert( mozilla::detail::AssertionConditionType< decltype(bytesToRead <= (4294967295U))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(bytesToRead <= (4294967295U )))), 0))) { do { } while (false); MOZ_ReportAssertionFailure ("bytesToRead <= (4294967295U)" " (" "bytesToRead range check" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1340); AnnotateMozCrashReason("MOZ_ASSERT" "(" "bytesToRead <= (4294967295U)" ") (" "bytesToRead range check" ")"); do { *((volatile int*) __null) = 1340; __attribute__((nomerge)) ::abort(); } while ( false); } } while (false); |
| 1341 | if (bytesToRead <= 0) { |
| 1342 | return PAGE_SYNC_END_OF_RANGE; |
| 1343 | } |
| 1344 | char* buffer = buffer_tainted.copy_and_verify_buffer_address( |
| 1345 | [](uintptr_t val) { return reinterpret_cast<char*>(val); }, |
| 1346 | static_cast<size_t>(bytesToRead)); |
| 1347 | |
| 1348 | nsresult rv = NS_OK; |
| 1349 | if (aCachedDataOnly) { |
| 1350 | rv = aResource->GetResource()->ReadFromCache( |
| 1351 | buffer, readHead, static_cast<uint32_t>(bytesToRead)); |
| 1352 | NS_ENSURE_SUCCESS(rv, PAGE_SYNC_ERROR)do { nsresult __rv = rv; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "rv", "PAGE_SYNC_ERROR", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1352); return PAGE_SYNC_ERROR; } } while (false); |
| 1353 | bytesRead = static_cast<uint32_t>(bytesToRead); |
| 1354 | } else { |
| 1355 | rv = aResource->Seek(nsISeekableStream::NS_SEEK_SET, readHead); |
| 1356 | NS_ENSURE_SUCCESS(rv, PAGE_SYNC_ERROR)do { nsresult __rv = rv; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "rv", "PAGE_SYNC_ERROR", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1356); return PAGE_SYNC_ERROR; } } while (false); |
| 1357 | rv = aResource->Read(buffer, static_cast<uint32_t>(bytesToRead), |
| 1358 | &bytesRead); |
| 1359 | NS_ENSURE_SUCCESS(rv, PAGE_SYNC_ERROR)do { nsresult __rv = rv; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "rv", "PAGE_SYNC_ERROR", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1359); return PAGE_SYNC_ERROR; } } while (false); |
| 1360 | } |
| 1361 | if (bytesRead == 0 && NS_SUCCEEDED(rv)((bool)(__builtin_expect(!!(!NS_FAILED_impl(rv)), 1)))) { |
| 1362 | // End of file. |
| 1363 | return PAGE_SYNC_END_OF_RANGE; |
| 1364 | } |
| 1365 | readHead += bytesRead; |
| 1366 | |
| 1367 | // Update the synchronisation layer with the number |
| 1368 | // of bytes written to the buffer |
| 1369 | ret = sandbox_invoke(*aSandbox, ogg_sync_wrote, aState, bytesRead)(*aSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_wrote)>( "ogg_sync_wrote", reinterpret_cast<void *>(&ogg_sync_wrote), aState, bytesRead); |
| 1370 | NS_ENSURE_TRUE(do { if ((__builtin_expect(!!(!(ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON ) == 0)), 0))) { NS_DebugBreak(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON) == 0" ") failed", nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1372); return PAGE_SYNC_ERROR; } } while (false) |
| 1371 | ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON) == 0,do { if ((__builtin_expect(!!(!(ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON ) == 0)), 0))) { NS_DebugBreak(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON) == 0" ") failed", nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1372); return PAGE_SYNC_ERROR; } } while (false) |
| 1372 | PAGE_SYNC_ERROR)do { if ((__builtin_expect(!!(!(ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON ) == 0)), 0))) { NS_DebugBreak(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON) == 0" ") failed", nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1372); return PAGE_SYNC_ERROR; } } while (false); |
| 1373 | continue; |
| 1374 | } |
| 1375 | |
| 1376 | if (ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON) < 0) { |
| 1377 | MOZ_ASSERT(aSkippedBytes >= 0, "Offset >= 0")do { static_assert( mozilla::detail::AssertionConditionType< decltype(aSkippedBytes >= 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(aSkippedBytes >= 0))), 0) )) { do { } while (false); MOZ_ReportAssertionFailure("aSkippedBytes >= 0" " (" "Offset >= 0" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1377); AnnotateMozCrashReason("MOZ_ASSERT" "(" "aSkippedBytes >= 0" ") (" "Offset >= 0" ")"); do { *((volatile int*)__null) = 1377; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 1378 | bool failedSkippedBytesVerify = false; |
| 1379 | ret.copy_and_verify([&](int val) { |
| 1380 | int64_t result = static_cast<int64_t>(aSkippedBytes) - val; |
| 1381 | if (result > std::numeric_limits<int>::max() || |
| 1382 | result > (aEndOffset - aOffset) || result < 0) { |
| 1383 | failedSkippedBytesVerify = true; |
| 1384 | } else { |
| 1385 | aSkippedBytes = AssertedCast<int>(result); |
| 1386 | } |
| 1387 | }); |
| 1388 | if (failedSkippedBytesVerify) { |
| 1389 | return PAGE_SYNC_ERROR; |
| 1390 | } |
| 1391 | continue; |
| 1392 | } |
| 1393 | } |
| 1394 | |
| 1395 | return PAGE_SYNC_OK; |
| 1396 | } |
| 1397 | |
| 1398 | // OggTrackDemuxer |
| 1399 | OggTrackDemuxer::OggTrackDemuxer(OggDemuxer* aParent, |
| 1400 | TrackInfo::TrackType aType, |
| 1401 | uint32_t aTrackNumber) |
| 1402 | : mParent(aParent), mType(aType) { |
| 1403 | mInfo = mParent->GetTrackInfo(aType, aTrackNumber); |
| 1404 | MOZ_ASSERT(mInfo)do { static_assert( mozilla::detail::AssertionConditionType< decltype(mInfo)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(!!(mInfo))), 0))) { do { } while ( false); MOZ_ReportAssertionFailure("mInfo", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1404); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mInfo" ")") ; do { *((volatile int*)__null) = 1404; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1405 | } |
| 1406 | |
| 1407 | OggTrackDemuxer::~OggTrackDemuxer() = default; |
| 1408 | |
| 1409 | UniquePtr<TrackInfo> OggTrackDemuxer::GetInfo() const { return mInfo->Clone(); } |
| 1410 | |
| 1411 | RefPtr<OggTrackDemuxer::SeekPromise> OggTrackDemuxer::Seek( |
| 1412 | const TimeUnit& aTime) { |
| 1413 | // Seeks to aTime. Upon success, SeekPromise will be resolved with the |
| 1414 | // actual time seeked to. Typically the random access point time |
| 1415 | mQueuedSample = nullptr; |
| 1416 | TimeUnit seekTime = aTime; |
| 1417 | if (mParent->SeekInternal(mType, aTime) == NS_OK) { |
| 1418 | RefPtr<MediaRawData> sample(NextSample()); |
| 1419 | |
| 1420 | // Check what time we actually seeked to. |
| 1421 | if (sample != nullptr) { |
| 1422 | seekTime = sample->mTime; |
| 1423 | OGG_DEBUG("%p seeked to time %" PRId64"l" "d", this, seekTime.ToMicroseconds()); |
| 1424 | } |
| 1425 | mQueuedSample = sample; |
| 1426 | |
| 1427 | return SeekPromise::CreateAndResolve(seekTime, __func__); |
| 1428 | } |
| 1429 | return SeekPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_DEMUXER_ERR, __func__); |
| 1430 | } |
| 1431 | |
| 1432 | RefPtr<MediaRawData> OggTrackDemuxer::NextSample() { |
| 1433 | OGG_DEBUG("OggTrackDemuxer::NextSample"); |
| 1434 | if (mQueuedSample) { |
| 1435 | RefPtr<MediaRawData> nextSample = mQueuedSample; |
| 1436 | mQueuedSample = nullptr; |
| 1437 | if (mType == TrackInfo::kAudioTrack) { |
| 1438 | nextSample->mTrackInfo = mParent->mSharedAudioTrackInfo; |
| 1439 | } |
| 1440 | OGG_DEBUG("OggTrackDemuxer::NextSample (queued)"); |
| 1441 | return nextSample; |
| 1442 | } |
| 1443 | ogg_packet* packet = mParent->GetNextPacket(mType); |
| 1444 | if (!packet) { |
| 1445 | return nullptr; |
| 1446 | } |
| 1447 | // Check the eos state in case we need to look for chained streams. |
| 1448 | bool eos = packet->e_o_s; |
| 1449 | OggCodecState* state = mParent->GetTrackCodecState(mType); |
| 1450 | RefPtr<MediaRawData> data = state->PacketOutAsMediaRawData(); |
| 1451 | // ogg allows 'nil' packets, that are EOS and of size 0. |
| 1452 | if (!data || (data->mEOS && data->Size() == 0)) { |
| 1453 | return nullptr; |
| 1454 | } |
| 1455 | if (mType == TrackInfo::kAudioTrack) { |
| 1456 | data->mTrackInfo = mParent->mSharedAudioTrackInfo; |
| 1457 | } |
| 1458 | // mDecodedAudioDuration gets adjusted during ReadOggChain(). |
| 1459 | TimeUnit totalDuration = mParent->mDecodedAudioDuration; |
| 1460 | if (eos) { |
| 1461 | // We've encountered an end of bitstream packet; check for a chained |
| 1462 | // bitstream following this one. |
| 1463 | // This will also update mSharedAudioTrackInfo. |
| 1464 | mParent->ReadOggChain(data->GetEndTime()); |
| 1465 | } |
| 1466 | data->mOffset = mParent->Resource(mType)->Tell(); |
| 1467 | // We adjust the start time of the sample to account for the potential ogg |
| 1468 | // chaining. |
| 1469 | data->mTime += totalDuration; |
| 1470 | if (!data->mTime.IsValid()) { |
| 1471 | return nullptr; |
| 1472 | } |
| 1473 | TimeUnit mediaStartTime = mParent->mStartTime.valueOr(TimeUnit::Zero()); |
| 1474 | TimeUnit mediaEndTime = |
| 1475 | mediaStartTime + |
| 1476 | mParent->mInfo.mMetadataDuration.valueOr(TimeUnit::FromInfinity()); |
| 1477 | // Trim packets that end after the media duration. |
| 1478 | if (mType == TrackInfo::kAudioTrack) { |
| 1479 | OGG_DEBUG("Check trimming %s > %s", data->GetEndTime().ToString().get(), |
| 1480 | mediaEndTime.ToString().get()); |
| 1481 | // Because of a quirk of this demuxer, this needs to be >=. It looks |
| 1482 | // useless, because `toTrim` is going to be 0, but it allows setting |
| 1483 | // `mOriginalPresentationWindow`, so that the trimming logic will later |
| 1484 | // remove extraneous frames. |
| 1485 | // This demuxer sets the end time of a packet to be the end time that |
| 1486 | // should be played, not the end time that corresponds to the number of |
| 1487 | // decoded frames, that we can only have after decoding. |
| 1488 | // >= allows detecting the last packet, and trimming it appropriately, |
| 1489 | // after decoding has happened, with the AudioTrimmer. |
| 1490 | if (data->GetEndTime() >= mediaEndTime) { |
| 1491 | TimeUnit toTrim = data->GetEndTime() - mediaEndTime; |
| 1492 | TimeUnit originalDuration = data->mDuration; |
| 1493 | OGG_DEBUG( |
| 1494 | "Demuxed past media end time, trimming: packet [%s,%s] to [%s,%s]", |
| 1495 | data->mTime.ToString().get(), data->GetEndTime().ToString().get(), |
| 1496 | data->mTime.ToString().get(), |
| 1497 | (data->mTime + originalDuration).ToString().get()); |
| 1498 | data->mOriginalPresentationWindow = |
| 1499 | Some(TimeInterval{data->mTime, data->GetEndTime()}); |
| 1500 | data->mDuration -= toTrim; |
| 1501 | if (data->mDuration.IsNegative()) { |
| 1502 | data->mDuration = TimeUnit::Zero(data->mTime); |
| 1503 | } |
| 1504 | } |
| 1505 | } |
| 1506 | |
| 1507 | OGG_DEBUG("OGG packet demuxed: [%s,%s] (duration: %s, type: %s)", |
| 1508 | data->mTime.ToString().get(), data->GetEndTime().ToString().get(), |
| 1509 | data->mDuration.ToString().get(), |
| 1510 | mType == TrackInfo::kAudioTrack ? "audio" : "video"); |
| 1511 | |
| 1512 | return data; |
| 1513 | } |
| 1514 | |
| 1515 | RefPtr<OggTrackDemuxer::SamplesPromise> OggTrackDemuxer::GetSamples( |
| 1516 | int32_t aNumSamples) { |
| 1517 | RefPtr<SamplesHolder> samples = new SamplesHolder; |
| 1518 | if (!aNumSamples) { |
| 1519 | return SamplesPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_DEMUXER_ERR, |
| 1520 | __func__); |
| 1521 | } |
| 1522 | |
| 1523 | while (aNumSamples) { |
| 1524 | RefPtr<MediaRawData> sample(NextSample()); |
| 1525 | if (!sample) { |
| 1526 | break; |
| 1527 | } |
| 1528 | if (!sample->HasValidTime()) { |
| 1529 | return SamplesPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_DEMUXER_ERR, |
| 1530 | __func__); |
| 1531 | } |
| 1532 | samples->AppendSample(sample); |
| 1533 | aNumSamples--; |
| 1534 | } |
| 1535 | |
| 1536 | if (samples->GetSamples().IsEmpty()) { |
| 1537 | return SamplesPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_END_OF_STREAM, |
| 1538 | __func__); |
| 1539 | } |
| 1540 | return SamplesPromise::CreateAndResolve(samples, __func__); |
| 1541 | } |
| 1542 | |
| 1543 | void OggTrackDemuxer::Reset() { |
| 1544 | mParent->Reset(mType); |
| 1545 | mQueuedSample = nullptr; |
| 1546 | } |
| 1547 | |
| 1548 | RefPtr<OggTrackDemuxer::SkipAccessPointPromise> |
| 1549 | OggTrackDemuxer::SkipToNextRandomAccessPoint(const TimeUnit& aTimeThreshold) { |
| 1550 | uint32_t parsed = 0; |
| 1551 | bool found = false; |
| 1552 | RefPtr<MediaRawData> sample; |
| 1553 | |
| 1554 | OGG_DEBUG("TimeThreshold: %f", aTimeThreshold.ToSeconds()); |
| 1555 | while (!found && (sample = NextSample())) { |
| 1556 | parsed++; |
| 1557 | if (sample->mKeyframe && sample->mTime >= aTimeThreshold) { |
| 1558 | found = true; |
| 1559 | mQueuedSample = sample; |
| 1560 | } |
| 1561 | } |
| 1562 | if (found) { |
| 1563 | OGG_DEBUG("next sample: %f (parsed: %d)", sample->mTime.ToSeconds(), |
| 1564 | parsed); |
| 1565 | return SkipAccessPointPromise::CreateAndResolve(parsed, __func__); |
| 1566 | } |
| 1567 | SkipFailureHolder failure(NS_ERROR_DOM_MEDIA_END_OF_STREAM, parsed); |
| 1568 | return SkipAccessPointPromise::CreateAndReject(std::move(failure), __func__); |
| 1569 | } |
| 1570 | |
| 1571 | TimeIntervals OggTrackDemuxer::GetBuffered() { |
| 1572 | return mParent->GetBuffered(mType); |
| 1573 | } |
| 1574 | |
| 1575 | void OggTrackDemuxer::BreakCycles() { mParent = nullptr; } |
| 1576 | |
| 1577 | // Returns an ogg page's checksum. |
| 1578 | tainted_opaque_ogg<ogg_uint32_t> OggDemuxer::GetPageChecksum( |
| 1579 | tainted_opaque_ogg<ogg_page*> aPage) { |
| 1580 | tainted_ogg<ogg_page*> page = rlbox::from_opaque(aPage); |
| 1581 | |
| 1582 | const char hint_reason[] = |
| 1583 | "Early bail out of checksum. Even if this is wrong, the renderer's " |
| 1584 | "security is not compromised."; |
| 1585 | if (page == nullptr || |
| 1586 | (page->header == nullptr).unverified_safe_because(hint_reason) || |
| 1587 | (page->header_len < 25).unverified_safe_because(hint_reason)) { |
| 1588 | tainted_ogg<ogg_uint32_t> ret = 0; |
| 1589 | return ret.to_opaque(); |
| 1590 | } |
| 1591 | |
| 1592 | const int CHECKSUM_BYTES_LENGTH = 4; |
| 1593 | const unsigned char* p = |
| 1594 | (page->header + 22u) |
| 1595 | .copy_and_verify_buffer_address( |
| 1596 | [](uintptr_t val) { |
| 1597 | return reinterpret_cast<const unsigned char*>(val); |
| 1598 | }, |
| 1599 | CHECKSUM_BYTES_LENGTH); |
| 1600 | uint32_t c = |
| 1601 | static_cast<uint32_t>(p[0] + (p[1] << 8) + (p[2] << 16) + (p[3] << 24)); |
| 1602 | tainted_ogg<uint32_t> ret = c; |
| 1603 | return ret.to_opaque(); |
| 1604 | } |
| 1605 | |
| 1606 | TimeUnit OggDemuxer::RangeStartTime(TrackInfo::TrackType aType, |
| 1607 | int64_t aOffset) { |
| 1608 | int64_t position = Resource(aType)->Tell(); |
| 1609 | nsresult res = Resource(aType)->Seek(nsISeekableStream::NS_SEEK_SET, aOffset); |
| 1610 | NS_ENSURE_SUCCESS(res, TimeUnit::Zero())do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "TimeUnit::Zero()", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1610); return TimeUnit::Zero(); } } while (false); |
| 1611 | TimeUnit startTime = TimeUnit::Zero(); |
| 1612 | FindStartTime(aType, startTime); |
| 1613 | res = Resource(aType)->Seek(nsISeekableStream::NS_SEEK_SET, position); |
| 1614 | NS_ENSURE_SUCCESS(res, TimeUnit::Invalid())do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "TimeUnit::Invalid()", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1614); return TimeUnit::Invalid(); } } while (false); |
| 1615 | return startTime; |
| 1616 | } |
| 1617 | |
| 1618 | struct nsDemuxerAutoOggSyncState { |
| 1619 | explicit nsDemuxerAutoOggSyncState(rlbox_sandbox_ogg& aSandbox) |
| 1620 | : mSandbox(aSandbox) { |
| 1621 | mState = mSandbox.malloc_in_sandbox<ogg_sync_state>(); |
| 1622 | MOZ_RELEASE_ASSERT(mState != nullptr)do { static_assert( mozilla::detail::AssertionConditionType< decltype(mState != nullptr)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(mState != nullptr))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("mState != nullptr" , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1622); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "mState != nullptr" ")"); do { *((volatile int*)__null) = 1622; __attribute__((nomerge )) ::abort(); } while (false); } } while (false); |
| 1623 | sandbox_invoke(mSandbox, ogg_sync_init, mState)(mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_init)>( "ogg_sync_init", reinterpret_cast<void *>(&ogg_sync_init), mState); |
| 1624 | } |
| 1625 | ~nsDemuxerAutoOggSyncState() { |
| 1626 | sandbox_invoke(mSandbox, ogg_sync_clear, mState)(mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_clear)>( "ogg_sync_clear", reinterpret_cast<void *>(&ogg_sync_clear), mState); |
| 1627 | mSandbox.free_in_sandbox(mState); |
| 1628 | } |
| 1629 | rlbox_sandbox_ogg& mSandbox; |
| 1630 | tainted_ogg<ogg_sync_state*> mState{}; |
| 1631 | }; |
| 1632 | |
| 1633 | TimeUnit OggDemuxer::RangeEndTime(TrackInfo::TrackType aType, |
| 1634 | int64_t aEndOffset) { |
| 1635 | int64_t position = Resource(aType)->Tell(); |
| 1636 | TimeUnit endTime = RangeEndTime(aType, 0, aEndOffset, false); |
| 1637 | nsresult res = |
| 1638 | Resource(aType)->Seek(nsISeekableStream::NS_SEEK_SET, position); |
| 1639 | NS_ENSURE_SUCCESS(res, TimeUnit::Invalid())do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "TimeUnit::Invalid()", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1639); return TimeUnit::Invalid(); } } while (false); |
| 1640 | return endTime; |
| 1641 | } |
| 1642 | |
| 1643 | TimeUnit OggDemuxer::RangeEndTime(TrackInfo::TrackType aType, |
| 1644 | int64_t aStartOffset, int64_t aEndOffset, |
| 1645 | bool aCachedDataOnly) { |
| 1646 | nsDemuxerAutoOggSyncState sync(*mSandbox); |
| 1647 | |
| 1648 | // We need to find the last page which ends before aEndOffset that |
| 1649 | // has a granulepos that we can convert to a timestamp. We do this by |
| 1650 | // backing off from aEndOffset until we encounter a page on which we can |
| 1651 | // interpret the granulepos. If while backing off we encounter a page which |
| 1652 | // we've previously encountered before, we'll either backoff again if we |
| 1653 | // haven't found an end time yet, or return the last end time found. |
| 1654 | const int step = 5000; |
| 1655 | const int maxOggPageSize = 65306; |
| 1656 | int64_t readStartOffset = aEndOffset; |
| 1657 | int64_t readLimitOffset = aEndOffset; |
| 1658 | int64_t readHead = aEndOffset; |
| 1659 | TimeUnit endTime = TimeUnit::Invalid(); |
| 1660 | uint32_t checksumAfterSeek = 0; |
| 1661 | uint32_t prevChecksumAfterSeek = 0; |
| 1662 | bool mustBackOff = false; |
| 1663 | tainted_ogg<ogg_page*> page = mSandbox->malloc_in_sandbox<ogg_page>(); |
| 1664 | if (!page) { |
| 1665 | return TimeUnit::Invalid(); |
| 1666 | } |
| 1667 | auto clean_page = MakeScopeExit([&] { mSandbox->free_in_sandbox(page); }); |
| 1668 | while (true) { |
| 1669 | tainted_ogg<long> seek_ret = |
| 1670 | sandbox_invoke(*mSandbox, ogg_sync_pageseek, sync.mState, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_pageseek)>( "ogg_sync_pageseek", reinterpret_cast <void*>(&ogg_sync_pageseek), sync.mState, page); |
| 1671 | |
| 1672 | // We aren't really verifying the value of seek_ret below. |
| 1673 | // We are merely ensuring that it won't overflow an integer. |
| 1674 | // However we are assigning the value to ret which is marked tainted, so |
| 1675 | // this is fine. |
| 1676 | bool failedVerify = false; |
| 1677 | CheckedInt<int> checker; |
| 1678 | tainted_ogg<int> ret = CopyAndVerifyOrFail( |
| 1679 | seek_ret, (static_cast<void>(checker = val), checker.isValid()), |
| 1680 | &failedVerify); |
| 1681 | if (failedVerify) { |
| 1682 | return TimeUnit::Invalid(); |
| 1683 | } |
| 1684 | |
| 1685 | if (ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON) == 0) { |
| 1686 | // We need more data if we've not encountered a page we've seen before, |
| 1687 | // or we've read to the end of file. |
| 1688 | if (mustBackOff || readHead == aEndOffset || readHead == aStartOffset) { |
| 1689 | if (endTime.IsValid() || readStartOffset == 0) { |
| 1690 | // We have encountered a page before, or we're at the end of file. |
| 1691 | break; |
| 1692 | } |
| 1693 | mustBackOff = false; |
| 1694 | prevChecksumAfterSeek = checksumAfterSeek; |
| 1695 | checksumAfterSeek = 0; |
| 1696 | sandbox_invoke(*mSandbox, ogg_sync_reset, sync.mState)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_reset)>( "ogg_sync_reset", reinterpret_cast<void *>(&ogg_sync_reset), sync.mState); |
| 1697 | readStartOffset = |
| 1698 | std::max(static_cast<int64_t>(0), readStartOffset - step); |
| 1699 | // There's no point reading more than the maximum size of |
| 1700 | // an Ogg page into data we've previously scanned. Any data |
| 1701 | // between readLimitOffset and aEndOffset must be garbage |
| 1702 | // and we can ignore it thereafter. |
| 1703 | readLimitOffset = |
| 1704 | std::min(readLimitOffset, readStartOffset + maxOggPageSize); |
| 1705 | readHead = std::max(aStartOffset, readStartOffset); |
| 1706 | } |
| 1707 | |
| 1708 | int64_t limit = |
| 1709 | std::min(static_cast<int64_t>(UINT32_MAX(4294967295U)), aEndOffset - readHead); |
| 1710 | limit = std::max(static_cast<int64_t>(0), limit); |
| 1711 | limit = std::min(limit, static_cast<int64_t>(step)); |
| 1712 | uint32_t bytesToRead = static_cast<uint32_t>(limit); |
| 1713 | uint32_t bytesRead = 0; |
| 1714 | tainted_ogg<char*> buffer_tainted = |
| 1715 | sandbox_invoke(*mSandbox, ogg_sync_buffer, sync.mState, bytesToRead)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_buffer)>( "ogg_sync_buffer", reinterpret_cast< void*>(&ogg_sync_buffer), sync.mState, bytesToRead); |
| 1716 | char* buffer = buffer_tainted.copy_and_verify_buffer_address( |
| 1717 | [](uintptr_t val) { return reinterpret_cast<char*>(val); }, |
| 1718 | bytesToRead); |
| 1719 | MOZ_ASSERT(buffer, "Must have buffer")do { static_assert( mozilla::detail::AssertionConditionType< decltype(buffer)>::isValid, "invalid assertion condition") ; if ((__builtin_expect(!!(!(!!(buffer))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("buffer" " (" "Must have buffer" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1719); AnnotateMozCrashReason("MOZ_ASSERT" "(" "buffer" ") (" "Must have buffer" ")"); do { *((volatile int*)__null) = 1719 ; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 1720 | nsresult res; |
| 1721 | if (aCachedDataOnly) { |
| 1722 | res = Resource(aType)->GetResource()->ReadFromCache(buffer, readHead, |
| 1723 | bytesToRead); |
| 1724 | NS_ENSURE_SUCCESS(res, TimeUnit::Invalid())do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "TimeUnit::Invalid()", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1724); return TimeUnit::Invalid(); } } while (false); |
| 1725 | bytesRead = bytesToRead; |
| 1726 | } else { |
| 1727 | MOZ_ASSERT(readHead < aEndOffset,do { static_assert( mozilla::detail::AssertionConditionType< decltype(readHead < aEndOffset)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(readHead < aEndOffset))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("readHead < aEndOffset" " (" "resource pos must be before range end" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1728); AnnotateMozCrashReason("MOZ_ASSERT" "(" "readHead < aEndOffset" ") (" "resource pos must be before range end" ")"); do { *(( volatile int*)__null) = 1728; __attribute__((nomerge)) ::abort (); } while (false); } } while (false) |
| 1728 | "resource pos must be before range end")do { static_assert( mozilla::detail::AssertionConditionType< decltype(readHead < aEndOffset)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(readHead < aEndOffset))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("readHead < aEndOffset" " (" "resource pos must be before range end" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1728); AnnotateMozCrashReason("MOZ_ASSERT" "(" "readHead < aEndOffset" ") (" "resource pos must be before range end" ")"); do { *(( volatile int*)__null) = 1728; __attribute__((nomerge)) ::abort (); } while (false); } } while (false); |
| 1729 | res = Resource(aType)->Seek(nsISeekableStream::NS_SEEK_SET, readHead); |
| 1730 | NS_ENSURE_SUCCESS(res, TimeUnit::Invalid())do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "TimeUnit::Invalid()", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1730); return TimeUnit::Invalid(); } } while (false); |
| 1731 | res = Resource(aType)->Read(buffer, bytesToRead, &bytesRead); |
| 1732 | NS_ENSURE_SUCCESS(res, TimeUnit::Invalid())do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "TimeUnit::Invalid()", static_cast <uint32_t>(__rv), name ? " (" : "", name ? name : "", name ? ")" : ""); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1732); return TimeUnit::Invalid(); } } while (false); |
| 1733 | } |
| 1734 | readHead += bytesRead; |
| 1735 | if (readHead > readLimitOffset) { |
| 1736 | mustBackOff = true; |
| 1737 | } |
| 1738 | |
| 1739 | // Update the synchronisation layer with the number |
| 1740 | // of bytes written to the buffer |
| 1741 | ret = sandbox_invoke(*mSandbox, ogg_sync_wrote, sync.mState, bytesRead)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_sync_wrote)>( "ogg_sync_wrote", reinterpret_cast<void *>(&ogg_sync_wrote), sync.mState, bytesRead); |
| 1742 | bool failedWroteVerify = false; |
| 1743 | int wrote_success = |
| 1744 | CopyAndVerifyOrFail(ret, val == 0 || val == -1, &failedWroteVerify); |
| 1745 | if (failedWroteVerify) { |
| 1746 | return TimeUnit::Invalid(); |
| 1747 | } |
| 1748 | |
| 1749 | if (wrote_success != 0) { |
| 1750 | endTime = TimeUnit::Invalid(); |
| 1751 | break; |
| 1752 | } |
| 1753 | continue; |
| 1754 | } |
| 1755 | |
| 1756 | if (ret.unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON) < 0 || |
| 1757 | sandbox_invoke(*mSandbox, ogg_page_granulepos, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_granulepos)>( "ogg_page_granulepos", reinterpret_cast <void*>(&ogg_page_granulepos), page) |
| 1758 | .unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON) < 0) { |
| 1759 | continue; |
| 1760 | } |
| 1761 | |
| 1762 | tainted_ogg<uint32_t> checksum_tainted = |
| 1763 | rlbox::from_opaque(GetPageChecksum(page.to_opaque())); |
| 1764 | uint32_t checksum = checksum_tainted.unverified_safe_because( |
| 1765 | "checksum is only being used as a hint as part of search for end time. " |
| 1766 | "Incorrect values will not affect the memory safety of the renderer."); |
| 1767 | if (checksumAfterSeek == 0) { |
| 1768 | // This is the first page we've decoded after a backoff/seek. Remember |
| 1769 | // the page checksum. If we backoff further and encounter this page |
| 1770 | // again, we'll know that we won't find a page with an end time after |
| 1771 | // this one, so we'll know to back off again. |
| 1772 | checksumAfterSeek = checksum; |
| 1773 | } |
| 1774 | if (checksum == prevChecksumAfterSeek) { |
| 1775 | // This page has the same checksum as the first page we encountered |
| 1776 | // after the last backoff/seek. Since we've already scanned after this |
| 1777 | // page and failed to find an end time, we may as well backoff again and |
| 1778 | // try to find an end time from an earlier page. |
| 1779 | mustBackOff = true; |
| 1780 | continue; |
| 1781 | } |
| 1782 | |
| 1783 | int64_t granulepos = |
| 1784 | sandbox_invoke(*mSandbox, ogg_page_granulepos, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_granulepos)>( "ogg_page_granulepos", reinterpret_cast <void*>(&ogg_page_granulepos), page) |
| 1785 | .unverified_safe_because( |
| 1786 | "If this is incorrect it may lead to incorrect seeking " |
| 1787 | "behavior in the stream, however will not affect the memory " |
| 1788 | "safety of the Firefox renderer."); |
| 1789 | uint32_t serial = static_cast<uint32_t>( |
| 1790 | sandbox_invoke(*mSandbox, ogg_page_serialno, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_serialno)>( "ogg_page_serialno", reinterpret_cast <void*>(&ogg_page_serialno), page) |
| 1791 | .unverified_safe_because(RLBOX_OGG_PAGE_SERIAL_REASON)); |
| 1792 | |
| 1793 | OggCodecState* codecState = nullptr; |
| 1794 | codecState = mCodecStore.Get(serial); |
| 1795 | if (!codecState) { |
| 1796 | // This page is from a bitstream which we haven't encountered yet. |
| 1797 | // It's probably from a new "link" in a "chained" ogg. Don't |
| 1798 | // bother even trying to find a duration... |
| 1799 | SetChained(); |
| 1800 | endTime = TimeUnit::Invalid(); |
| 1801 | break; |
| 1802 | } |
| 1803 | |
| 1804 | TimeUnit t = codecState->Time(granulepos); |
| 1805 | if (t.IsValid()) { |
| 1806 | endTime = t; |
| 1807 | } |
| 1808 | } |
| 1809 | |
| 1810 | return endTime; |
| 1811 | } |
| 1812 | |
| 1813 | nsresult OggDemuxer::GetSeekRanges(TrackInfo::TrackType aType, |
| 1814 | nsTArray<SeekRange>& aRanges) { |
| 1815 | AutoPinned<MediaResource> resource(Resource(aType)->GetResource()); |
| 1816 | MediaByteRangeSet cached; |
| 1817 | nsresult res = resource->GetCachedRanges(cached); |
| 1818 | NS_ENSURE_SUCCESS(res, res)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "res", static_cast<uint32_t >(__rv), name ? " (" : "", name ? name : "", name ? ")" : "" ); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1818); return res; } } while (false); |
| 1819 | |
| 1820 | for (uint32_t index = 0; index < cached.Length(); index++) { |
| 1821 | const auto& range = cached[index]; |
| 1822 | TimeUnit startTime = TimeUnit::Invalid(); |
| 1823 | TimeUnit endTime = TimeUnit::Invalid(); |
| 1824 | if (NS_FAILED(Reset(aType))((bool)(__builtin_expect(!!(NS_FAILED_impl(Reset(aType))), 0) ))) { |
| 1825 | return NS_ERROR_FAILURE; |
| 1826 | } |
| 1827 | int64_t startOffset = range.mStart; |
| 1828 | int64_t endOffset = range.mEnd; |
| 1829 | startTime = RangeStartTime(aType, startOffset); |
| 1830 | if (startTime.IsValid() && |
| 1831 | ((endTime = RangeEndTime(aType, endOffset)).IsValid())) { |
| 1832 | NS_WARNING_ASSERTION(startTime < endTime,do { if (!(startTime < endTime)) { NS_DebugBreak(NS_DEBUG_WARNING , "Start time must be before end time", "startTime < endTime" , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1833); } } while (false) |
| 1833 | "Start time must be before end time")do { if (!(startTime < endTime)) { NS_DebugBreak(NS_DEBUG_WARNING , "Start time must be before end time", "startTime < endTime" , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1833); } } while (false); |
| 1834 | aRanges.AppendElement( |
| 1835 | SeekRange(startOffset, endOffset, startTime, endTime)); |
| 1836 | } |
| 1837 | } |
| 1838 | if (NS_FAILED(Reset(aType))((bool)(__builtin_expect(!!(NS_FAILED_impl(Reset(aType))), 0) ))) { |
| 1839 | return NS_ERROR_FAILURE; |
| 1840 | } |
| 1841 | return NS_OK; |
| 1842 | } |
| 1843 | |
| 1844 | OggDemuxer::SeekRange OggDemuxer::SelectSeekRange( |
| 1845 | TrackInfo::TrackType aType, const nsTArray<SeekRange>& ranges, |
| 1846 | const TimeUnit& aTarget, const TimeUnit& aStartTime, |
| 1847 | const TimeUnit& aEndTime, bool aExact) { |
| 1848 | int64_t so = 0; |
| 1849 | int64_t eo = Resource(aType)->GetLength(); |
| 1850 | TimeUnit st = aStartTime; |
| 1851 | TimeUnit et = aEndTime; |
| 1852 | for (uint32_t i = 0; i < ranges.Length(); i++) { |
| 1853 | const SeekRange& r = ranges[i]; |
| 1854 | if (r.mTimeStart < aTarget) { |
| 1855 | so = r.mOffsetStart; |
| 1856 | st = r.mTimeStart; |
| 1857 | } |
| 1858 | if (r.mTimeEnd >= aTarget && r.mTimeEnd < et) { |
| 1859 | eo = r.mOffsetEnd; |
| 1860 | et = r.mTimeEnd; |
| 1861 | } |
| 1862 | |
| 1863 | if (r.mTimeStart < aTarget && aTarget <= r.mTimeEnd) { |
| 1864 | // Target lies exactly in this range. |
| 1865 | return ranges[i]; |
| 1866 | } |
| 1867 | } |
| 1868 | if (aExact || eo == -1) { |
| 1869 | return SeekRange(); |
| 1870 | } |
| 1871 | return SeekRange(so, eo, st, et); |
| 1872 | } |
| 1873 | |
| 1874 | nsresult OggDemuxer::SeekInBufferedRange(TrackInfo::TrackType aType, |
| 1875 | const TimeUnit& aTarget, |
| 1876 | TimeUnit& aAdjustedTarget, |
| 1877 | const TimeUnit& aStartTime, |
| 1878 | const TimeUnit& aEndTime, |
| 1879 | const nsTArray<SeekRange>& aRanges, |
| 1880 | const SeekRange& aRange) { |
| 1881 | OGG_DEBUG("Seeking in buffered data to %s using bisection search", |
| 1882 | aTarget.ToString().get()); |
| 1883 | if (aType == TrackInfo::kVideoTrack || aAdjustedTarget >= aTarget) { |
| 1884 | // We know the exact byte range in which the target must lie. It must |
| 1885 | // be buffered in the media cache. Seek there. |
| 1886 | nsresult res = SeekBisection(aType, aTarget, aRange, TimeUnit::Zero()); |
| 1887 | if (NS_FAILED(res)((bool)(__builtin_expect(!!(NS_FAILED_impl(res)), 0))) || aType != TrackInfo::kVideoTrack) { |
| 1888 | return res; |
| 1889 | } |
| 1890 | |
| 1891 | // We have an active Theora bitstream. Peek the next Theora frame, and |
| 1892 | // extract its keyframe's time. |
| 1893 | DemuxUntilPacketAvailable(aType, mTheoraState); |
| 1894 | ogg_packet* packet = mTheoraState->PacketPeek(); |
| 1895 | if (packet && !mTheoraState->IsKeyframe(packet)) { |
| 1896 | // First post-seek frame isn't a keyframe, seek back to previous keyframe, |
| 1897 | // otherwise we'll get visual artifacts. |
| 1898 | MOZ_ASSERT(packet->granulepos != -1, "Must have a granulepos")do { static_assert( mozilla::detail::AssertionConditionType< decltype(packet->granulepos != -1)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(packet->granulepos != -1) )), 0))) { do { } while (false); MOZ_ReportAssertionFailure("packet->granulepos != -1" " (" "Must have a granulepos" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1898); AnnotateMozCrashReason("MOZ_ASSERT" "(" "packet->granulepos != -1" ") (" "Must have a granulepos" ")"); do { *((volatile int*)__null ) = 1898; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); |
| 1899 | int shift = mTheoraState->KeyFrameGranuleJobs(); |
| 1900 | int64_t keyframeGranulepos = (packet->granulepos >> shift) << shift; |
| 1901 | TimeUnit keyframeTime = mTheoraState->StartTime(keyframeGranulepos); |
| 1902 | SEEK_LOG(LogLevel::Debug, |
| 1903 | ("Keyframe for %lld is at %lld, seeking back to it", frameTime, |
| 1904 | keyframeTime)); |
| 1905 | aAdjustedTarget = std::min(aAdjustedTarget, keyframeTime); |
| 1906 | } |
| 1907 | } |
| 1908 | |
| 1909 | nsresult res = NS_OK; |
| 1910 | if (aAdjustedTarget < aTarget) { |
| 1911 | SeekRange k = SelectSeekRange(aType, aRanges, aAdjustedTarget, aStartTime, |
| 1912 | aEndTime, false); |
| 1913 | res = SeekBisection(aType, aAdjustedTarget, k, OGG_SEEK_FUZZ_USECS); |
| 1914 | } |
| 1915 | return res; |
| 1916 | } |
| 1917 | |
| 1918 | nsresult OggDemuxer::SeekInUnbuffered(TrackInfo::TrackType aType, |
| 1919 | const TimeUnit& aTarget, |
| 1920 | const TimeUnit& aStartTime, |
| 1921 | const TimeUnit& aEndTime, |
| 1922 | const nsTArray<SeekRange>& aRanges) { |
| 1923 | OGG_DEBUG("Seeking in unbuffered data to %s using bisection search", |
| 1924 | aTarget.ToString().get()); |
| 1925 | |
| 1926 | // If we've got an active Theora bitstream, determine the maximum possible |
| 1927 | // time in usecs which a keyframe could be before a given interframe. We |
| 1928 | // subtract this from our seek target, seek to the new target, and then |
| 1929 | // will decode forward to the original seek target. We should encounter a |
| 1930 | // keyframe in that interval. This prevents us from needing to run two |
| 1931 | // bisections; one for the seek target frame, and another to find its |
| 1932 | // keyframe. It's usually faster to just download this extra data, rather |
| 1933 | // tham perform two bisections to find the seek target's keyframe. We |
| 1934 | // don't do this offsetting when seeking in a buffered range, |
| 1935 | // as the extra decoding causes a noticeable speed hit when all the data |
| 1936 | // is buffered (compared to just doing a bisection to exactly find the |
| 1937 | // keyframe). |
| 1938 | TimeUnit keyframeOffset = TimeUnit::Zero(); |
| 1939 | if (aType == TrackInfo::kVideoTrack && mTheoraState) { |
| 1940 | keyframeOffset = mTheoraState->MaxKeyframeOffset(); |
| 1941 | } |
| 1942 | // Add in the Opus pre-roll if necessary, as well. |
| 1943 | if (aType == TrackInfo::kAudioTrack && mOpusState) { |
| 1944 | keyframeOffset = std::max(keyframeOffset, OGG_SEEK_OPUS_PREROLL); |
| 1945 | } |
| 1946 | TimeUnit seekTarget = std::max(aStartTime, aTarget - keyframeOffset); |
| 1947 | // Minimize the bisection search space using the known timestamps from the |
| 1948 | // buffered ranges. |
| 1949 | SeekRange k = |
| 1950 | SelectSeekRange(aType, aRanges, seekTarget, aStartTime, aEndTime, false); |
| 1951 | return SeekBisection(aType, seekTarget, k, OGG_SEEK_FUZZ_USECS); |
| 1952 | } |
| 1953 | |
| 1954 | nsresult OggDemuxer::SeekBisection(TrackInfo::TrackType aType, |
| 1955 | const TimeUnit& aTarget, |
| 1956 | const SeekRange& aRange, |
| 1957 | const TimeUnit& aFuzz) { |
| 1958 | nsresult res; |
| 1959 | |
| 1960 | if (aTarget <= aRange.mTimeStart) { |
| 1961 | if (NS_FAILED(Reset(aType))((bool)(__builtin_expect(!!(NS_FAILED_impl(Reset(aType))), 0) ))) { |
| 1962 | return NS_ERROR_FAILURE; |
| 1963 | } |
| 1964 | res = Resource(aType)->Seek(nsISeekableStream::NS_SEEK_SET, 0); |
| 1965 | NS_ENSURE_SUCCESS(res, res)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "res", static_cast<uint32_t >(__rv), name ? " (" : "", name ? name : "", name ? ")" : "" ); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1965); return res; } } while (false); |
| 1966 | return NS_OK; |
| 1967 | } |
| 1968 | |
| 1969 | // Bisection search, find start offset of last page with end time less than |
| 1970 | // the seek target. |
| 1971 | ogg_int64_t startOffset = aRange.mOffsetStart; |
| 1972 | ogg_int64_t startTime = aRange.mTimeStart.ToMicroseconds(); |
| 1973 | ogg_int64_t startLength = 0; // Length of the page at startOffset. |
| 1974 | ogg_int64_t endOffset = aRange.mOffsetEnd; |
| 1975 | ogg_int64_t endTime = aRange.mTimeEnd.ToMicroseconds(); |
| 1976 | |
| 1977 | ogg_int64_t seekTarget = aTarget.ToMicroseconds(); |
| 1978 | int64_t seekLowerBound = |
| 1979 | std::max(static_cast<int64_t>(0), |
| 1980 | aTarget.ToMicroseconds() - aFuzz.ToMicroseconds()); |
| 1981 | int hops = 0; |
| 1982 | DebugOnly<ogg_int64_t> previousGuess = -1; |
| 1983 | int backsteps = 0; |
| 1984 | const int maxBackStep = 10; |
| 1985 | MOZ_ASSERT(do { static_assert( mozilla::detail::AssertionConditionType< decltype(static_cast<uint64_t>(PAGE_STEP) * pow(2.0, maxBackStep ) < (2147483647))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(static_cast<uint64_t>( PAGE_STEP) * pow(2.0, maxBackStep) < (2147483647)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("static_cast<uint64_t>(PAGE_STEP) * pow(2.0, maxBackStep) < (2147483647)" " (" "Backstep calculation must not overflow" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1987); AnnotateMozCrashReason("MOZ_ASSERT" "(" "static_cast<uint64_t>(PAGE_STEP) * pow(2.0, maxBackStep) < (2147483647)" ") (" "Backstep calculation must not overflow" ")"); do { *( (volatile int*)__null) = 1987; __attribute__((nomerge)) ::abort (); } while (false); } } while (false) |
| 1986 | static_cast<uint64_t>(PAGE_STEP) * pow(2.0, maxBackStep) < INT32_MAX,do { static_assert( mozilla::detail::AssertionConditionType< decltype(static_cast<uint64_t>(PAGE_STEP) * pow(2.0, maxBackStep ) < (2147483647))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(static_cast<uint64_t>( PAGE_STEP) * pow(2.0, maxBackStep) < (2147483647)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("static_cast<uint64_t>(PAGE_STEP) * pow(2.0, maxBackStep) < (2147483647)" " (" "Backstep calculation must not overflow" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1987); AnnotateMozCrashReason("MOZ_ASSERT" "(" "static_cast<uint64_t>(PAGE_STEP) * pow(2.0, maxBackStep) < (2147483647)" ") (" "Backstep calculation must not overflow" ")"); do { *( (volatile int*)__null) = 1987; __attribute__((nomerge)) ::abort (); } while (false); } } while (false) |
| 1987 | "Backstep calculation must not overflow")do { static_assert( mozilla::detail::AssertionConditionType< decltype(static_cast<uint64_t>(PAGE_STEP) * pow(2.0, maxBackStep ) < (2147483647))>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(static_cast<uint64_t>( PAGE_STEP) * pow(2.0, maxBackStep) < (2147483647)))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("static_cast<uint64_t>(PAGE_STEP) * pow(2.0, maxBackStep) < (2147483647)" " (" "Backstep calculation must not overflow" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 1987); AnnotateMozCrashReason("MOZ_ASSERT" "(" "static_cast<uint64_t>(PAGE_STEP) * pow(2.0, maxBackStep) < (2147483647)" ") (" "Backstep calculation must not overflow" ")"); do { *( (volatile int*)__null) = 1987; __attribute__((nomerge)) ::abort (); } while (false); } } while (false); |
| 1988 | |
| 1989 | // Seek via bisection search. Loop until we find the offset where the page |
| 1990 | // before the offset is before the seek target, and the page after the offset |
| 1991 | // is after the seek target. |
| 1992 | tainted_ogg<ogg_page*> page = mSandbox->malloc_in_sandbox<ogg_page>(); |
| 1993 | if (!page) { |
| 1994 | return NS_ERROR_OUT_OF_MEMORY; |
| 1995 | } |
| 1996 | auto clean_page = MakeScopeExit([&] { mSandbox->free_in_sandbox(page); }); |
| 1997 | while (true) { |
| 1998 | ogg_int64_t duration = 0; |
| 1999 | double target = 0; |
| 2000 | ogg_int64_t interval = 0; |
| 2001 | ogg_int64_t guess = 0; |
| 2002 | int skippedBytes = 0; |
| 2003 | ogg_int64_t pageOffset = 0; |
| 2004 | ogg_int64_t pageLength = 0; |
| 2005 | ogg_int64_t granuleTime = -1; |
| 2006 | bool mustBackoff = false; |
| 2007 | |
| 2008 | // Guess where we should bisect to, based on the bit rate and the time |
| 2009 | // remaining in the interval. Loop until we can determine the time at |
| 2010 | // the guess offset. |
| 2011 | while (true) { |
| 2012 | // Discard any previously buffered packets/pages. |
| 2013 | if (NS_FAILED(Reset(aType))((bool)(__builtin_expect(!!(NS_FAILED_impl(Reset(aType))), 0) ))) { |
| 2014 | return NS_ERROR_FAILURE; |
| 2015 | } |
| 2016 | |
| 2017 | interval = endOffset - startOffset - startLength; |
| 2018 | if (interval == 0) { |
| 2019 | // Our interval is empty, we've found the optimal seek point, as the |
| 2020 | // page at the start offset is before the seek target, and the page |
| 2021 | // at the end offset is after the seek target. |
| 2022 | SEEK_LOG(LogLevel::Debug, |
| 2023 | ("Interval narrowed, terminating bisection.")); |
| 2024 | break; |
| 2025 | } |
| 2026 | |
| 2027 | // Guess bisection point. |
| 2028 | duration = endTime - startTime; |
| 2029 | target = (double)(seekTarget - startTime) / (double)duration; |
| 2030 | guess = startOffset + startLength + |
| 2031 | static_cast<ogg_int64_t>((double)interval * target); |
| 2032 | guess = std::min(guess, endOffset - PAGE_STEP); |
| 2033 | if (mustBackoff) { |
| 2034 | // We previously failed to determine the time at the guess offset, |
| 2035 | // probably because we ran out of data to decode. This usually happens |
| 2036 | // when we guess very close to the end offset. So reduce the guess |
| 2037 | // offset using an exponential backoff until we determine the time. |
| 2038 | SEEK_LOG( |
| 2039 | LogLevel::Debug, |
| 2040 | ("Backing off %d bytes, backsteps=%d", |
| 2041 | static_cast<int32_t>(PAGE_STEP * pow(2.0, backsteps)), backsteps)); |
| 2042 | guess -= PAGE_STEP * static_cast<ogg_int64_t>(pow(2.0, backsteps)); |
| 2043 | |
| 2044 | if (guess <= startOffset) { |
| 2045 | // We've tried to backoff to before the start offset of our seek |
| 2046 | // range. This means we couldn't find a seek termination position |
| 2047 | // near the end of the seek range, so just set the seek termination |
| 2048 | // condition, and break out of the bisection loop. We'll begin |
| 2049 | // decoding from the start of the seek range. |
| 2050 | interval = 0; |
| 2051 | break; |
| 2052 | } |
| 2053 | |
| 2054 | backsteps = std::min(backsteps + 1, maxBackStep); |
| 2055 | // We reset mustBackoff. If we still need to backoff further, it will |
| 2056 | // be set to true again. |
| 2057 | mustBackoff = false; |
Value stored to 'mustBackoff' is never read | |
| 2058 | } else { |
| 2059 | backsteps = 0; |
| 2060 | } |
| 2061 | guess = std::max(guess, startOffset + startLength); |
| 2062 | |
| 2063 | SEEK_LOG(LogLevel::Debug, |
| 2064 | ("Seek loop start[o=%lld..%lld t=%lld] " |
| 2065 | "end[o=%lld t=%lld] " |
| 2066 | "interval=%lld target=%lf guess=%lld", |
| 2067 | startOffset, (startOffset + startLength), startTime, endOffset, |
| 2068 | endTime, interval, target, guess)); |
| 2069 | |
| 2070 | MOZ_ASSERT(guess >= startOffset + startLength,do { static_assert( mozilla::detail::AssertionConditionType< decltype(guess >= startOffset + startLength)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(! !(guess >= startOffset + startLength))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("guess >= startOffset + startLength" " (" "Guess must be after range start" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2071); AnnotateMozCrashReason("MOZ_ASSERT" "(" "guess >= startOffset + startLength" ") (" "Guess must be after range start" ")"); do { *((volatile int*)__null) = 2071; __attribute__((nomerge)) ::abort(); } while (false); } } while (false) |
| 2071 | "Guess must be after range start")do { static_assert( mozilla::detail::AssertionConditionType< decltype(guess >= startOffset + startLength)>::isValid, "invalid assertion condition"); if ((__builtin_expect(!!(!(! !(guess >= startOffset + startLength))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("guess >= startOffset + startLength" " (" "Guess must be after range start" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2071); AnnotateMozCrashReason("MOZ_ASSERT" "(" "guess >= startOffset + startLength" ") (" "Guess must be after range start" ")"); do { *((volatile int*)__null) = 2071; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 2072 | MOZ_ASSERT(guess < endOffset, "Guess must be before range end")do { static_assert( mozilla::detail::AssertionConditionType< decltype(guess < endOffset)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(guess < endOffset))), 0)) ) { do { } while (false); MOZ_ReportAssertionFailure("guess < endOffset" " (" "Guess must be before range end" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2072); AnnotateMozCrashReason("MOZ_ASSERT" "(" "guess < endOffset" ") (" "Guess must be before range end" ")"); do { *((volatile int*)__null) = 2072; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 2073 | MOZ_ASSERT(guess != previousGuess,do { static_assert( mozilla::detail::AssertionConditionType< decltype(guess != previousGuess)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(guess != previousGuess))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("guess != previousGuess" " (" "Guess should be different to previous" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2074); AnnotateMozCrashReason("MOZ_ASSERT" "(" "guess != previousGuess" ") (" "Guess should be different to previous" ")"); do { *(( volatile int*)__null) = 2074; __attribute__((nomerge)) ::abort (); } while (false); } } while (false) |
| 2074 | "Guess should be different to previous")do { static_assert( mozilla::detail::AssertionConditionType< decltype(guess != previousGuess)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(guess != previousGuess))), 0 ))) { do { } while (false); MOZ_ReportAssertionFailure("guess != previousGuess" " (" "Guess should be different to previous" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2074); AnnotateMozCrashReason("MOZ_ASSERT" "(" "guess != previousGuess" ") (" "Guess should be different to previous" ")"); do { *(( volatile int*)__null) = 2074; __attribute__((nomerge)) ::abort (); } while (false); } } while (false); |
| 2075 | previousGuess = guess; |
| 2076 | |
| 2077 | hops++; |
| 2078 | |
| 2079 | // Locate the next page after our seek guess, and then figure out the |
| 2080 | // granule time of the audio and video bitstreams there. We can then |
| 2081 | // make a bisection decision based on our location in the media. |
| 2082 | PageSyncResult pageSyncResult = |
| 2083 | PageSync(mSandbox.get(), Resource(aType), OggSyncState(aType), false, |
| 2084 | guess, endOffset, page, skippedBytes); |
| 2085 | NS_ENSURE_TRUE(pageSyncResult != PAGE_SYNC_ERROR, NS_ERROR_FAILURE)do { if ((__builtin_expect(!!(!(pageSyncResult != PAGE_SYNC_ERROR )), 0))) { NS_DebugBreak(NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "pageSyncResult != PAGE_SYNC_ERROR" ") failed", nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2085); return NS_ERROR_FAILURE; } } while (false); |
| 2086 | |
| 2087 | if (pageSyncResult == PAGE_SYNC_END_OF_RANGE) { |
| 2088 | // Our guess was too close to the end, we've ended up reading the end |
| 2089 | // page. Backoff exponentially from the end point, in case the last |
| 2090 | // page/frame/sample is huge. |
| 2091 | mustBackoff = true; |
| 2092 | SEEK_LOG(LogLevel::Debug, ("Hit the end of range, backing off")); |
| 2093 | continue; |
| 2094 | } |
| 2095 | |
| 2096 | // We've located a page of length |ret| at |guess + skippedBytes|. |
| 2097 | // Remember where the page is located. |
| 2098 | pageOffset = guess + skippedBytes; |
| 2099 | |
| 2100 | bool failedPageLenVerify = false; |
| 2101 | // Page length should be under 64Kb according to |
| 2102 | // https://xiph.org/ogg/doc/libogg/ogg_page.html |
| 2103 | pageLength = CopyAndVerifyOrFail(page->header_len + page->body_len, |
| 2104 | val <= 64 * 1024, &failedPageLenVerify); |
| 2105 | if (failedPageLenVerify) { |
| 2106 | return NS_ERROR_FAILURE; |
| 2107 | } |
| 2108 | |
| 2109 | // Read pages until we can determine the granule time of the audio and |
| 2110 | // video bitstream. |
| 2111 | ogg_int64_t audioTime = -1; |
| 2112 | ogg_int64_t videoTime = -1; |
| 2113 | do { |
| 2114 | // Add the page to its codec state, determine its granule time. |
| 2115 | uint32_t serial = static_cast<uint32_t>( |
| 2116 | sandbox_invoke(*mSandbox, ogg_page_serialno, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_serialno)>( "ogg_page_serialno", reinterpret_cast <void*>(&ogg_page_serialno), page) |
| 2117 | .unverified_safe_because(RLBOX_OGG_PAGE_SERIAL_REASON)); |
| 2118 | OggCodecState* codecState = mCodecStore.Get(serial); |
| 2119 | if (codecState && GetCodecStateType(codecState) == aType) { |
| 2120 | if (codecState->mActive) { |
| 2121 | int ret = |
| 2122 | sandbox_invoke(*mSandbox, ogg_stream_pagein, codecState->mState,(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_stream_pagein)>( "ogg_stream_pagein", reinterpret_cast <void*>(&ogg_stream_pagein), codecState->mState, page) |
| 2123 | page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_stream_pagein)>( "ogg_stream_pagein", reinterpret_cast <void*>(&ogg_stream_pagein), codecState->mState, page) |
| 2124 | .unverified_safe_because(RLBOX_OGG_STATE_ASSERT_REASON); |
| 2125 | NS_ENSURE_TRUE(ret == 0, NS_ERROR_FAILURE)do { if ((__builtin_expect(!!(!(ret == 0)), 0))) { NS_DebugBreak (NS_DEBUG_WARNING, "NS_ENSURE_TRUE(" "ret == 0" ") failed", nullptr , "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2125); return NS_ERROR_FAILURE; } } while (false); |
| 2126 | } |
| 2127 | |
| 2128 | ogg_int64_t granulepos = |
| 2129 | sandbox_invoke(*mSandbox, ogg_page_granulepos, page)(*mSandbox).template INTERNAL_invoke_with_func_ptr<decltype (ogg_page_granulepos)>( "ogg_page_granulepos", reinterpret_cast <void*>(&ogg_page_granulepos), page) |
| 2130 | .unverified_safe_because( |
| 2131 | "If this is incorrect it may lead to incorrect seeking " |
| 2132 | "behavior in the stream, however will not affect the " |
| 2133 | "memory safety of the Firefox renderer."); |
| 2134 | |
| 2135 | if (aType == TrackInfo::kAudioTrack && granulepos > 0 && |
| 2136 | audioTime == -1) { |
| 2137 | if (mVorbisState && serial == mVorbisState->mSerial) { |
| 2138 | audioTime = mVorbisState->Time(granulepos).ToMicroseconds(); |
| 2139 | } else if (mOpusState && serial == mOpusState->mSerial) { |
| 2140 | audioTime = mOpusState->Time(granulepos).ToMicroseconds(); |
| 2141 | } else if (mFlacState && serial == mFlacState->mSerial) { |
| 2142 | audioTime = mFlacState->Time(granulepos).ToMicroseconds(); |
| 2143 | } |
| 2144 | } |
| 2145 | |
| 2146 | if (aType == TrackInfo::kVideoTrack && granulepos > 0 && |
| 2147 | serial == mTheoraState->mSerial && videoTime == -1) { |
| 2148 | videoTime = mTheoraState->Time(granulepos).ToMicroseconds(); |
| 2149 | } |
| 2150 | |
| 2151 | if (pageOffset + pageLength >= endOffset) { |
| 2152 | // Hit end of readable data. |
| 2153 | break; |
| 2154 | } |
| 2155 | } |
| 2156 | if (!ReadOggPage(aType, page.to_opaque())) { |
| 2157 | break; |
| 2158 | } |
| 2159 | |
| 2160 | } while ((aType == TrackInfo::kAudioTrack && audioTime == -1) || |
| 2161 | (aType == TrackInfo::kVideoTrack && videoTime == -1)); |
| 2162 | |
| 2163 | if ((aType == TrackInfo::kAudioTrack && audioTime == -1) || |
| 2164 | (aType == TrackInfo::kVideoTrack && videoTime == -1)) { |
| 2165 | // We don't have timestamps for all active tracks... |
| 2166 | if (pageOffset == startOffset + startLength && |
| 2167 | pageOffset + pageLength >= endOffset) { |
| 2168 | // We read the entire interval without finding timestamps for all |
| 2169 | // active tracks. We know the interval start offset is before the seek |
| 2170 | // target, and the interval end is after the seek target, and we can't |
| 2171 | // terminate inside the interval, so we terminate the seek at the |
| 2172 | // start of the interval. |
| 2173 | interval = 0; |
| 2174 | break; |
| 2175 | } |
| 2176 | |
| 2177 | // We should backoff; cause the guess to back off from the end, so |
| 2178 | // that we've got more room to capture. |
| 2179 | mustBackoff = true; |
| 2180 | continue; |
| 2181 | } |
| 2182 | |
| 2183 | // We've found appropriate time stamps here. Proceed to bisect |
| 2184 | // the search space. |
| 2185 | granuleTime = aType == TrackInfo::kAudioTrack ? audioTime : videoTime; |
| 2186 | MOZ_ASSERT(granuleTime > 0, "Must get a granuletime")do { static_assert( mozilla::detail::AssertionConditionType< decltype(granuleTime > 0)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(granuleTime > 0))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("granuleTime > 0" " (" "Must get a granuletime" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2186); AnnotateMozCrashReason("MOZ_ASSERT" "(" "granuleTime > 0" ") (" "Must get a granuletime" ")"); do { *((volatile int*)__null ) = 2186; __attribute__((nomerge)) ::abort(); } while (false) ; } } while (false); |
| 2187 | break; |
| 2188 | } // End of "until we determine time at guess offset" loop. |
| 2189 | |
| 2190 | if (interval == 0) { |
| 2191 | // Seek termination condition; we've found the page boundary of the |
| 2192 | // last page before the target, and the first page after the target. |
| 2193 | SEEK_LOG(LogLevel::Debug, |
| 2194 | ("Terminating seek at offset=%lld", startOffset)); |
| 2195 | MOZ_ASSERT(startTime < aTarget.ToMicroseconds(),do { static_assert( mozilla::detail::AssertionConditionType< decltype(startTime < aTarget.ToMicroseconds())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(startTime < aTarget.ToMicroseconds()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("startTime < aTarget.ToMicroseconds()" " (" "Start time must always be less than target" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2196); AnnotateMozCrashReason("MOZ_ASSERT" "(" "startTime < aTarget.ToMicroseconds()" ") (" "Start time must always be less than target" ")"); do { *((volatile int*)__null) = 2196; __attribute__((nomerge)) :: abort(); } while (false); } } while (false) |
| 2196 | "Start time must always be less than target")do { static_assert( mozilla::detail::AssertionConditionType< decltype(startTime < aTarget.ToMicroseconds())>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(startTime < aTarget.ToMicroseconds()))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("startTime < aTarget.ToMicroseconds()" " (" "Start time must always be less than target" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2196); AnnotateMozCrashReason("MOZ_ASSERT" "(" "startTime < aTarget.ToMicroseconds()" ") (" "Start time must always be less than target" ")"); do { *((volatile int*)__null) = 2196; __attribute__((nomerge)) :: abort(); } while (false); } } while (false); |
| 2197 | res = Resource(aType)->Seek(nsISeekableStream::NS_SEEK_SET, startOffset); |
| 2198 | NS_ENSURE_SUCCESS(res, res)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "res", static_cast<uint32_t >(__rv), name ? " (" : "", name ? name : "", name ? ")" : "" ); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2198); return res; } } while (false); |
| 2199 | if (NS_FAILED(Reset(aType))((bool)(__builtin_expect(!!(NS_FAILED_impl(Reset(aType))), 0) ))) { |
| 2200 | return NS_ERROR_FAILURE; |
| 2201 | } |
| 2202 | break; |
| 2203 | } |
| 2204 | |
| 2205 | SEEK_LOG(LogLevel::Debug, |
| 2206 | ("Time at offset %lld is %lld", guess, granuleTime)); |
| 2207 | if (granuleTime < seekTarget && granuleTime > seekLowerBound) { |
| 2208 | // We're within the fuzzy region in which we want to terminate the search. |
| 2209 | res = Resource(aType)->Seek(nsISeekableStream::NS_SEEK_SET, pageOffset); |
| 2210 | NS_ENSURE_SUCCESS(res, res)do { nsresult __rv = res; if (((bool)(__builtin_expect(!!(NS_FAILED_impl (__rv)), 0)))) { const char* name = mozilla::GetStaticErrorName (__rv); mozilla::SmprintfPointer msg = mozilla::Smprintf( "NS_ENSURE_SUCCESS(%s, %s) failed with " "result 0x%" "X" "%s%s%s", "res", "res", static_cast<uint32_t >(__rv), name ? " (" : "", name ? name : "", name ? ")" : "" ); NS_DebugBreak(NS_DEBUG_WARNING, msg.get(), nullptr, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2210); return res; } } while (false); |
| 2211 | if (NS_FAILED(Reset(aType))((bool)(__builtin_expect(!!(NS_FAILED_impl(Reset(aType))), 0) ))) { |
| 2212 | return NS_ERROR_FAILURE; |
| 2213 | } |
| 2214 | SEEK_LOG(LogLevel::Debug, |
| 2215 | ("Terminating seek at offset=%lld", pageOffset)); |
| 2216 | break; |
| 2217 | } |
| 2218 | |
| 2219 | if (granuleTime >= seekTarget) { |
| 2220 | // We've landed after the seek target. |
| 2221 | MOZ_ASSERT(pageOffset < endOffset, "offset_end must decrease")do { static_assert( mozilla::detail::AssertionConditionType< decltype(pageOffset < endOffset)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(pageOffset < endOffset))) , 0))) { do { } while (false); MOZ_ReportAssertionFailure("pageOffset < endOffset" " (" "offset_end must decrease" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2221); AnnotateMozCrashReason("MOZ_ASSERT" "(" "pageOffset < endOffset" ") (" "offset_end must decrease" ")"); do { *((volatile int* )__null) = 2221; __attribute__((nomerge)) ::abort(); } while ( false); } } while (false); |
| 2222 | endOffset = pageOffset; |
| 2223 | endTime = granuleTime; |
| 2224 | } else if (granuleTime < seekTarget) { |
| 2225 | // Landed before seek target. |
| 2226 | MOZ_ASSERT(pageOffset >= startOffset + startLength,do { static_assert( mozilla::detail::AssertionConditionType< decltype(pageOffset >= startOffset + startLength)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(pageOffset >= startOffset + startLength))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("pageOffset >= startOffset + startLength" " (" "Bisection point should be at or after end of first page in " "interval" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2228); AnnotateMozCrashReason("MOZ_ASSERT" "(" "pageOffset >= startOffset + startLength" ") (" "Bisection point should be at or after end of first page in " "interval" ")"); do { *((volatile int*)__null) = 2228; __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false) |
| 2227 | "Bisection point should be at or after end of first page in "do { static_assert( mozilla::detail::AssertionConditionType< decltype(pageOffset >= startOffset + startLength)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(pageOffset >= startOffset + startLength))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("pageOffset >= startOffset + startLength" " (" "Bisection point should be at or after end of first page in " "interval" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2228); AnnotateMozCrashReason("MOZ_ASSERT" "(" "pageOffset >= startOffset + startLength" ") (" "Bisection point should be at or after end of first page in " "interval" ")"); do { *((volatile int*)__null) = 2228; __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false) |
| 2228 | "interval")do { static_assert( mozilla::detail::AssertionConditionType< decltype(pageOffset >= startOffset + startLength)>::isValid , "invalid assertion condition"); if ((__builtin_expect(!!(!( !!(pageOffset >= startOffset + startLength))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("pageOffset >= startOffset + startLength" " (" "Bisection point should be at or after end of first page in " "interval" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2228); AnnotateMozCrashReason("MOZ_ASSERT" "(" "pageOffset >= startOffset + startLength" ") (" "Bisection point should be at or after end of first page in " "interval" ")"); do { *((volatile int*)__null) = 2228; __attribute__ ((nomerge)) ::abort(); } while (false); } } while (false); |
| 2229 | startOffset = pageOffset; |
| 2230 | startLength = pageLength; |
| 2231 | startTime = granuleTime; |
| 2232 | } |
| 2233 | MOZ_ASSERT(startTime <= seekTarget, "Must be before seek target")do { static_assert( mozilla::detail::AssertionConditionType< decltype(startTime <= seekTarget)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(startTime <= seekTarget)) ), 0))) { do { } while (false); MOZ_ReportAssertionFailure("startTime <= seekTarget" " (" "Must be before seek target" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2233); AnnotateMozCrashReason("MOZ_ASSERT" "(" "startTime <= seekTarget" ") (" "Must be before seek target" ")"); do { *((volatile int *)__null) = 2233; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 2234 | MOZ_ASSERT(endTime >= seekTarget, "End must be after seek target")do { static_assert( mozilla::detail::AssertionConditionType< decltype(endTime >= seekTarget)>::isValid, "invalid assertion condition" ); if ((__builtin_expect(!!(!(!!(endTime >= seekTarget))), 0))) { do { } while (false); MOZ_ReportAssertionFailure("endTime >= seekTarget" " (" "End must be after seek target" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/ogg/OggDemuxer.cpp" , 2234); AnnotateMozCrashReason("MOZ_ASSERT" "(" "endTime >= seekTarget" ") (" "End must be after seek target" ")"); do { *((volatile int*)__null) = 2234; __attribute__((nomerge)) ::abort(); } while (false); } } while (false); |
| 2235 | } |
| 2236 | |
| 2237 | (void)hops; |
| 2238 | SEEK_LOG(LogLevel::Debug, ("Seek complete in %d bisections.", hops)); |
| 2239 | |
| 2240 | return NS_OK; |
| 2241 | } |
| 2242 | |
| 2243 | #undef OGG_DEBUG |
| 2244 | #undef SEEK_LOG |
| 2245 | #undef CopyAndVerifyOrFail |
| 2246 | } // namespace mozilla |