Bug Summary

File:var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h
Warning:line 367, column 10
Excessive padding in 'struct mozilla::MediaFormatReader::DecoderData' (34 padding bytes, where 2 is optimal). Optimal fields order: mOwner, mTrackDemuxer, mTaskQueue, mDecoder, mDecodePerfRecorder, mSeekRequest, mQueuedSamples, mDemuxRequest, mWaitingPromise, mDecodeRequest, mShutdownPromise, mDrainRequest, mOutput, mNumSamplesInput, mNumSamplesOutput, mNumSamplesOutputTotal, mNumSamplesSkippedTotal, mSizeOfQueue, mOriginalInfo, mWorkingInfo, mInfo, mDescription, mProcessName, mCodecName, mWaitingForDataStartTime, mMeanRate, mFirstFrameTime, mLastTimeRangesEnd, mFirstDemuxedSampleTime, mError, mMutex, mLastDecodedSampleTime, mTimeThreshold, mTimeRanges, mDrainState, mNumOfConsecutiveDecodingError, mMaxConsecutiveDecodingError, mNumOfConsecutiveRDDOrGPUCrashes, mMaxConsecutiveRDDOrGPUCrashes, mNumOfConsecutiveUtilityCrashes, mMaxConsecutiveUtilityCrashes, mIsHardwareAccelerated, mLastStreamSourceID, mNextStreamSourceID, mType, mUpdateScheduled, mDemuxEOS, mWaitingForKey, mReceivedNewData, mFlushing, mFlushed, mIsNullDecode, mHardwareDecodingDisabled, mHasReportedVideoHardwareSupportTelemtry, consider reordering the fields or adding explicit padding members

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name Unified_cpp_dom_html4.cpp -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -analyzer-config-compatibility-mode=true -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -mframe-pointer=all -relaxed-aliasing -ffp-contract=off -fno-rounding-math -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dom/html -fcoverage-compilation-dir=/var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dom/html -resource-dir /usr/lib/llvm-19/lib/clang/19 -include /var/lib/jenkins/workspace/firefox-scan-build/config/gcc_hidden.h -include /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/mozilla-config.h -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/stl_wrappers -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/system_wrappers -U _FORTIFY_SOURCE -D _FORTIFY_SOURCE=2 -D DEBUG=1 -D MOZ_HAS_MOZGLUE -D MOZILLA_INTERNAL_API -D IMPL_LIBXUL -D MOZ_SUPPORT_LEAKCHECKING -D STATIC_EXPORTABLE_JS_API -I /var/lib/jenkins/workspace/firefox-scan-build/dom/html -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dom/html -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/ipc/ipdl/_ipdlheaders -I /var/lib/jenkins/workspace/firefox-scan-build/ipc/chromium/src -I /var/lib/jenkins/workspace/firefox-scan-build/caps -I /var/lib/jenkins/workspace/firefox-scan-build/docshell/base -I /var/lib/jenkins/workspace/firefox-scan-build/dom/base -I /var/lib/jenkins/workspace/firefox-scan-build/dom/canvas -I /var/lib/jenkins/workspace/firefox-scan-build/dom/html/input -I /var/lib/jenkins/workspace/firefox-scan-build/dom/media -I /var/lib/jenkins/workspace/firefox-scan-build/dom/security -I /var/lib/jenkins/workspace/firefox-scan-build/dom/xul -I /var/lib/jenkins/workspace/firefox-scan-build/image -I /var/lib/jenkins/workspace/firefox-scan-build/layout/forms -I /var/lib/jenkins/workspace/firefox-scan-build/layout/generic -I /var/lib/jenkins/workspace/firefox-scan-build/layout/style -I /var/lib/jenkins/workspace/firefox-scan-build/layout/tables -I /var/lib/jenkins/workspace/firefox-scan-build/layout/xul -I /var/lib/jenkins/workspace/firefox-scan-build/netwerk/base -I /var/lib/jenkins/workspace/firefox-scan-build/parser/htmlparser -I /var/lib/jenkins/workspace/firefox-scan-build/third_party/libwebrtc -I /var/lib/jenkins/workspace/firefox-scan-build/third_party/libwebrtc/third_party/abseil-cpp -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nspr -I /var/lib/jenkins/workspace/firefox-scan-build/obj-x86_64-pc-linux-gnu/dist/include/nss -D MOZILLA_CLIENT -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/backward -internal-isystem /usr/lib/llvm-19/lib/clang/19/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -O2 -Wno-error=tautological-type-limit-compare -Wno-invalid-offsetof -Wno-range-loop-analysis -Wno-deprecated-anon-enum-enum-conversion -Wno-deprecated-enum-enum-conversion -Wno-deprecated-this-capture -Wno-inline-new-delete -Wno-error=deprecated-declarations -Wno-error=array-bounds -Wno-error=free-nonheap-object -Wno-error=atomic-alignment -Wno-error=deprecated-builtins -Wno-psabi -Wno-error=builtin-macro-redefined -Wno-vla-cxx-extension -Wno-unknown-warning-option -fdeprecated-macro -ferror-limit 19 -fstrict-flex-arrays=1 -stack-protector 2 -fstack-clash-protection -ftrivial-auto-var-init=pattern -fno-rtti -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fno-sized-deallocation -fno-aligned-allocation -vectorize-loops -vectorize-slp -analyzer-checker optin.performance.Padding -analyzer-output=html -analyzer-config stable-report-filename=true -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /tmp/scan-build-2024-09-22-115206-3586786-1 -x c++ Unified_cpp_dom_html4.cpp
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#if !defined(MediaFormatReader_h_)
8# define MediaFormatReader_h_
9
10# include "FrameStatistics.h"
11# include "MediaDataDemuxer.h"
12# include "MediaEventSource.h"
13# include "MediaMetadataManager.h"
14# include "MediaPromiseDefs.h"
15# include "PlatformDecoderModule.h"
16# include "SeekTarget.h"
17# include "mozilla/Atomics.h"
18# include "mozilla/Maybe.h"
19# include "mozilla/MozPromise.h"
20# include "mozilla/Mutex.h"
21# include "mozilla/StateMirroring.h"
22# include "mozilla/StaticPrefs_media.h"
23# include "mozilla/TaskQueue.h"
24# include "mozilla/TimeStamp.h"
25# include "mozilla/ThreadSafeWeakPtr.h"
26# include "mozilla/dom/MediaDebugInfoBinding.h"
27
28namespace mozilla {
29
30class CDMProxy;
31class GMPCrashHelper;
32class MediaResource;
33class VideoFrameContainer;
34
35struct WaitForDataRejectValue {
36 enum Reason { SHUTDOWN, CANCELED };
37
38 WaitForDataRejectValue(MediaData::Type aType, Reason aReason)
39 : mType(aType), mReason(aReason) {}
40 MediaData::Type mType;
41 Reason mReason;
42};
43
44struct SeekRejectValue {
45 MOZ_IMPLICIT SeekRejectValue(const MediaResult& aError)
46 : mType(MediaData::Type::NULL_DATA), mError(aError) {}
47 MOZ_IMPLICIT SeekRejectValue(nsresult aResult)
48 : mType(MediaData::Type::NULL_DATA), mError(aResult) {}
49 SeekRejectValue(MediaData::Type aType, const MediaResult& aError)
50 : mType(aType), mError(aError) {}
51 MediaData::Type mType;
52 MediaResult mError;
53};
54
55struct MetadataHolder {
56 UniquePtr<MediaInfo> mInfo;
57 UniquePtr<MetadataTags> mTags;
58};
59
60using MediaDecoderOwnerID = void*;
61
62struct MOZ_STACK_CLASS MediaFormatReaderInit {
63 MediaResource* mResource = nullptr;
64 VideoFrameContainer* mVideoFrameContainer = nullptr;
65 FrameStatistics* mFrameStats = nullptr;
66 already_AddRefed<layers::KnowsCompositor> mKnowsCompositor;
67 already_AddRefed<GMPCrashHelper> mCrashHelper;
68 // Used in bug 1393399 for temporary telemetry.
69 MediaDecoderOwnerID mMediaDecoderOwnerID = nullptr;
70 Maybe<TrackingId> mTrackingId;
71};
72
73DDLoggedTypeDeclName(MediaFormatReader)class MediaFormatReader; template <> struct DDLoggedTypeTraits
<MediaFormatReader> { using Type = MediaFormatReader; static
constexpr const char* Name() { return "MediaFormatReader"; }
using HasBase = std::false_type; using BaseType = MediaFormatReader
; static constexpr const char* BaseTypeName() { return ""; } }
;;
74
75class MediaFormatReader final
76 : public SupportsThreadSafeWeakPtr<MediaFormatReader>,
77 public DecoderDoctorLifeLogger<MediaFormatReader> {
78 static const bool IsExclusive = true;
79 using TrackType = TrackInfo::TrackType;
80 using NotifyDataArrivedPromise = MozPromise<bool, MediaResult, IsExclusive>;
81
82 public:
83 MOZ_DECLARE_REFCOUNTED_TYPENAME(MediaFormatReader)const char* typeName() const { return "MediaFormatReader"; } size_t
typeSize() const { return sizeof(*this); }
84
85 using TrackSet = EnumSet<TrackInfo::TrackType>;
86 using MetadataPromise = MozPromise<MetadataHolder, MediaResult, IsExclusive>;
87
88 template <typename Type>
89 using DataPromise = MozPromise<RefPtr<Type>, MediaResult, IsExclusive>;
90 using AudioDataPromise = DataPromise<AudioData>;
91 using VideoDataPromise = DataPromise<VideoData>;
92
93 using SeekPromise = MozPromise<media::TimeUnit, SeekRejectValue, IsExclusive>;
94
95 // Note that, conceptually, WaitForData makes sense in a non-exclusive sense.
96 // But in the current architecture it's only ever used exclusively (by MDSM),
97 // so we mark it that way to verify our assumptions. If you have a use-case
98 // for multiple WaitForData consumers, feel free to flip the exclusivity here.
99 using WaitForDataPromise =
100 MozPromise<MediaData::Type, WaitForDataRejectValue, IsExclusive>;
101
102 MediaFormatReader(MediaFormatReaderInit& aInit, MediaDataDemuxer* aDemuxer);
103 virtual ~MediaFormatReader();
104
105 // Initializes the reader, returns NS_OK on success, or NS_ERROR_FAILURE
106 // on failure.
107 nsresult Init();
108
109 size_t SizeOfVideoQueueInFrames();
110 size_t SizeOfAudioQueueInFrames();
111
112 // Requests one video sample from the reader.
113 RefPtr<VideoDataPromise> RequestVideoData(
114 const media::TimeUnit& aTimeThreshold,
115 bool aRequestNextVideoKeyFrame = false);
116
117 // Requests one audio sample from the reader.
118 //
119 // The decode should be performed asynchronously, and the promise should
120 // be resolved when it is complete.
121 RefPtr<AudioDataPromise> RequestAudioData();
122
123 // The default implementation of AsyncReadMetadata is implemented in terms of
124 // synchronous ReadMetadata() calls. Implementations may also
125 // override AsyncReadMetadata to create a more proper async implementation.
126 RefPtr<MetadataPromise> AsyncReadMetadata();
127
128 // Fills aInfo with the latest cached data required to present the media,
129 // ReadUpdatedMetadata will always be called once ReadMetadata has succeeded.
130 void ReadUpdatedMetadata(MediaInfo* aInfo);
131
132 RefPtr<SeekPromise> Seek(const SeekTarget& aTarget);
133
134 // Called once new data has been cached by the MediaResource.
135 // mBuffered should be recalculated and updated accordingly.
136 void NotifyDataArrived();
137
138 // Update ID for the external playback engine. Currently it's only used on
139 // Windows when the media engine playback is enabled.
140 void UpdateMediaEngineId(uint64_t aMediaEngineId);
141
142 // This function will be called if the media key is set before playback
143 // starts, indicating the playback should be encrypted.
144 void SetEncryptedCustomIdent();
145
146 bool IsEncryptedCustomIdent() const { return mEncryptedCustomIdent; }
147
148 protected:
149 // Recomputes mBuffered.
150 void UpdateBuffered();
151
152 public:
153 // Called by MDSM in dormant state to release resources allocated by this
154 // reader. The reader can resume decoding by calling Seek() to a specific
155 // position.
156 void ReleaseResources();
157
158 bool OnTaskQueue() const { return OwnerThread()->IsCurrentThreadIn(); }
159
160 // Resets all state related to decoding, emptying all buffers etc.
161 // Cancels all pending Request*Data() request callbacks, rejects any
162 // outstanding seek promises, and flushes the decode pipeline. The
163 // decoder must not call any of the callbacks for outstanding
164 // Request*Data() calls after this is called. Calls to Request*Data()
165 // made after this should be processed as usual.
166 //
167 // Normally this call preceedes a Seek() call, or shutdown.
168 //
169 // aParam is a set of TrackInfo::TrackType enums specifying which
170 // queues need to be reset, defaulting to both audio and video tracks.
171 nsresult ResetDecode(const TrackSet& aTracks);
172
173 // Destroys the decoding state. The reader cannot be made usable again.
174 // This is different from ReleaseMediaResources() as it is irreversable,
175 // whereas ReleaseMediaResources() is. Must be called on the decode
176 // thread.
177 RefPtr<ShutdownPromise> Shutdown();
178
179 // Returns true if this decoder reader uses hardware accelerated video
180 // decoding.
181 bool VideoIsHardwareAccelerated() const;
182
183 // By default, the state machine polls the reader once per second when it's
184 // in buffering mode. Some readers support a promise-based mechanism by which
185 // they notify the state machine when the data arrives.
186 bool IsWaitForDataSupported() const { return true; }
187
188 RefPtr<WaitForDataPromise> WaitForData(MediaData::Type aType);
189
190 // The MediaDecoderStateMachine uses various heuristics that assume that
191 // raw media data is arriving sequentially from a network channel. This
192 // makes sense in the <video src="foo"> case, but not for more advanced use
193 // cases like MSE.
194 bool UseBufferingHeuristics() const { return mTrackDemuxersMayBlock; }
195
196 RefPtr<SetCDMPromise> SetCDMProxy(CDMProxy* aProxy);
197
198 // Requests that the MediaFormatReader populates aInfo with debug information.
199 // This may be done asynchronously, and aInfo should *not* be accessed by the
200 // caller until the returned promise is resolved or rejected.
201 RefPtr<GenericPromise> RequestDebugInfo(
202 dom::MediaFormatReaderDebugInfo& aInfo);
203
204 // Switch the video decoder to NullDecoderModule. It might takes effective
205 // since a few samples later depends on how much demuxed samples are already
206 // queued in the original video decoder.
207 void SetVideoNullDecode(bool aIsNullDecode);
208
209 void UpdateCompositor(already_AddRefed<layers::KnowsCompositor>);
210
211 void UpdateDuration(const media::TimeUnit& aDuration) {
212 MOZ_ASSERT(OnTaskQueue())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(OnTaskQueue())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(OnTaskQueue()))), 0))) { do {
} while (false); MOZ_ReportAssertionFailure("OnTaskQueue()",
"/var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h"
, 212); AnnotateMozCrashReason("MOZ_ASSERT" "(" "OnTaskQueue()"
")"); do { *((volatile int*)__null) = 212; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
213 UpdateBuffered();
214 }
215
216 AbstractCanonical<media::TimeIntervals>* CanonicalBuffered() {
217 return &mBuffered;
218 }
219
220 TaskQueue* OwnerThread() const { return mTaskQueue; }
221
222 TimedMetadataEventSource& TimedMetadataEvent() { return mTimedMetadataEvent; }
223
224 // Notified by the OggDemuxer during playback when chained ogg is detected.
225 MediaEventSource<void>& OnMediaNotSeekable() { return mOnMediaNotSeekable; }
226
227 TimedMetadataEventProducer& TimedMetadataProducer() {
228 return mTimedMetadataEvent;
229 }
230
231 MediaEventProducer<void>& MediaNotSeekableProducer() {
232 return mOnMediaNotSeekable;
233 }
234
235 // Notified if the reader can't decode a sample due to a missing decryption
236 // key.
237 MediaEventSource<TrackInfo::TrackType>& OnTrackWaitingForKey() {
238 return mOnTrackWaitingForKey;
239 }
240
241 MediaEventProducer<TrackInfo::TrackType>& OnTrackWaitingForKeyProducer() {
242 return mOnTrackWaitingForKey;
243 }
244
245 MediaEventSource<nsTArray<uint8_t>, nsString>& OnEncrypted() {
246 return mOnEncrypted;
247 }
248
249 MediaEventSource<void>& OnWaitingForKey() { return mOnWaitingForKey; }
250
251 MediaEventSource<MediaResult>& OnDecodeWarning() { return mOnDecodeWarning; }
252
253 MediaEventSource<VideoInfo>& OnStoreDecoderBenchmark() {
254 return mOnStoreDecoderBenchmark;
255 }
256
257 MediaEventProducer<VideoInfo, AudioInfo>& OnTrackInfoUpdatedEvent() {
258 return mTrackInfoUpdatedEvent;
259 }
260
261 private:
262 bool HasVideo() const { return mVideo.mTrackDemuxer; }
263 bool HasAudio() const { return mAudio.mTrackDemuxer; }
264
265 bool IsWaitingOnCDMResource();
266
267 bool InitDemuxer();
268 // Notify the track demuxers that new data has been received.
269 void NotifyTrackDemuxers();
270 void ReturnOutput(MediaData* aData, TrackType aTrack);
271
272 // Enqueues a task to call Update(aTrack) on the decoder task queue.
273 // Lock for corresponding track must be held.
274 void ScheduleUpdate(TrackType aTrack);
275 void Update(TrackType aTrack);
276 // Handle actions should more data be received.
277 // Returns true if no more action is required.
278 bool UpdateReceivedNewData(TrackType aTrack);
279 // Called when new samples need to be demuxed.
280 void RequestDemuxSamples(TrackType aTrack);
281 // Handle demuxed samples by the input behavior.
282 void HandleDemuxedSamples(TrackType aTrack,
283 FrameStatistics::AutoNotifyDecoded& aA);
284 // Decode any pending already demuxed samples.
285 void DecodeDemuxedSamples(TrackType aTrack, MediaRawData* aSample);
286
287 struct InternalSeekTarget {
288 InternalSeekTarget(const media::TimeInterval& aTime, bool aDropTarget)
289 : mTime(aTime),
290 mDropTarget(aDropTarget),
291 mWaiting(false),
292 mHasSeeked(false) {}
293
294 media::TimeUnit Time() const { return mTime.mStart; }
295 media::TimeUnit EndTime() const { return mTime.mEnd; }
296 bool Contains(const media::TimeUnit& aTime) const {
297 return mTime.Contains(aTime);
298 }
299
300 media::TimeInterval mTime;
301 bool mDropTarget;
302 bool mWaiting;
303 bool mHasSeeked;
304 };
305
306 // Perform an internal seek to aTime. If aDropTarget is true then
307 // the first sample past the target will be dropped.
308 void InternalSeek(TrackType aTrack, const InternalSeekTarget& aTarget);
309 // Return the end time of the internal seek target if it exists. Otherwise,
310 // return infinity.
311 media::TimeUnit GetInternalSeekTargetEndTime() const;
312
313 // Drain the current decoder.
314 void DrainDecoder(TrackType aTrack);
315 void NotifyNewOutput(TrackType aTrack,
316 MediaDataDecoder::DecodedData&& aResults);
317 void NotifyError(TrackType aTrack, const MediaResult& aError);
318 void NotifyWaitingForData(TrackType aTrack);
319 void NotifyWaitingForKey(TrackType aTrack);
320 void NotifyEndOfStream(TrackType aTrack);
321
322 void ExtractCryptoInitData(nsTArray<uint8_t>& aInitData);
323
324 // Initializes mLayersBackendType if possible.
325 void InitLayersBackendType();
326
327 void Reset(TrackType aTrack);
328 void DropDecodedSamples(TrackType aTrack);
329
330 // Return a target timeunit which the reader should skip to, this would be
331 // either the timethreshold we pass, or the time of the next keyframe. Return
332 // nothing if we don't need to skip.
333 // @param aTimeThreshold
334 // The time that we expect the time of next video frame should be or go beyond
335 // @param aRequestNextVideoKeyFrame
336 // If true and the next keyframe's time is larger than aTimeThreshold, skip to
337 // the next keyframe time instead of aTimeThreshold.
338 Maybe<media::TimeUnit> ShouldSkip(media::TimeUnit aTimeThreshold,
339 bool aRequestNextVideoKeyFrame);
340
341 void SetVideoDecodeThreshold();
342
343 size_t SizeOfQueue(TrackType aTrack);
344
345 // Fire a new OnStoreDecoderBenchmark event that will create new
346 // storage of the decoder benchmark.
347 // This is called only on TaskQueue.
348 void NotifyDecoderBenchmarkStore();
349
350 void NotifyTrackInfoUpdated();
351
352 enum class DrainState {
353 None,
354 DrainRequested,
355 Draining,
356 PartialDrainPending,
357 DrainCompleted,
358 DrainAborted,
359 };
360
361 class SharedShutdownPromiseHolder : public MozPromiseHolder<ShutdownPromise> {
362 NS_INLINE_DECL_THREADSAFE_REFCOUNTING(SharedShutdownPromiseHolder)public: MozExternalRefCountType AddRef(void) { static_assert(
!std::is_destructible_v<SharedShutdownPromiseHolder>, "Reference-counted class "
"SharedShutdownPromiseHolder" " should not have a public destructor. "
"Make this class's destructor non-public"); do { static_assert
( mozilla::detail::AssertionConditionType<decltype(int32_t
(mRefCnt) >= 0)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) >= 0))),
0))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) >= 0"
" (" "illegal refcnt" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h"
, 362); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) >= 0"
") (" "illegal refcnt" ")"); do { *((volatile int*)__null) =
362; __attribute__((nomerge)) ::abort(); } while (false); } }
while (false); nsrefcnt count = ++mRefCnt; NS_LogAddRef((this
), (count), ("SharedShutdownPromiseHolder"), (uint32_t)(sizeof
(*this))); return (nsrefcnt)count; } MozExternalRefCountType Release
(void) { do { static_assert( mozilla::detail::AssertionConditionType
<decltype(int32_t(mRefCnt) > 0)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(int32_t(mRefCnt) > 0))), 0
))) { do { } while (false); MOZ_ReportAssertionFailure("int32_t(mRefCnt) > 0"
" (" "dup release" ")", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h"
, 362); AnnotateMozCrashReason("MOZ_ASSERT" "(" "int32_t(mRefCnt) > 0"
") (" "dup release" ")"); do { *((volatile int*)__null) = 362
; __attribute__((nomerge)) ::abort(); } while (false); } } while
(false); nsrefcnt count = --mRefCnt; NS_LogRelease((this), (
count), ("SharedShutdownPromiseHolder")); if (count == 0) { delete
(this); return 0; } return count; } using HasThreadSafeRefCnt
= std::true_type; protected: ::mozilla::ThreadSafeAutoRefCnt
mRefCnt; public:
363 private:
364 ~SharedShutdownPromiseHolder() = default;
365 };
366
367 struct DecoderData {
Excessive padding in 'struct mozilla::MediaFormatReader::DecoderData' (34 padding bytes, where 2 is optimal). Optimal fields order: mOwner, mTrackDemuxer, mTaskQueue, mDecoder, mDecodePerfRecorder, mSeekRequest, mQueuedSamples, mDemuxRequest, mWaitingPromise, mDecodeRequest, mShutdownPromise, mDrainRequest, mOutput, mNumSamplesInput, mNumSamplesOutput, mNumSamplesOutputTotal, mNumSamplesSkippedTotal, mSizeOfQueue, mOriginalInfo, mWorkingInfo, mInfo, mDescription, mProcessName, mCodecName, mWaitingForDataStartTime, mMeanRate, mFirstFrameTime, mLastTimeRangesEnd, mFirstDemuxedSampleTime, mError, mMutex, mLastDecodedSampleTime, mTimeThreshold, mTimeRanges, mDrainState, mNumOfConsecutiveDecodingError, mMaxConsecutiveDecodingError, mNumOfConsecutiveRDDOrGPUCrashes, mMaxConsecutiveRDDOrGPUCrashes, mNumOfConsecutiveUtilityCrashes, mMaxConsecutiveUtilityCrashes, mIsHardwareAccelerated, mLastStreamSourceID, mNextStreamSourceID, mType, mUpdateScheduled, mDemuxEOS, mWaitingForKey, mReceivedNewData, mFlushing, mFlushed, mIsNullDecode, mHardwareDecodingDisabled, mHasReportedVideoHardwareSupportTelemtry, consider reordering the fields or adding explicit padding members
368 DecoderData(MediaFormatReader* aOwner, MediaData::Type aType,
369 uint32_t aNumOfMaxError)
370 : mOwner(aOwner),
371 mType(aType),
372 mMutex("DecoderData"),
373 mDescription("uninitialized"),
374 mProcessName(""),
375 mCodecName(""),
376 mUpdateScheduled(false),
377 mDemuxEOS(false),
378 mWaitingForDataStartTime(Nothing()),
379 mWaitingForKey(false),
380 mReceivedNewData(false),
381 mFlushing(false),
382 mFlushed(true),
383 mDrainState(DrainState::None),
384 mNumOfConsecutiveDecodingError(0),
385 mMaxConsecutiveDecodingError(aNumOfMaxError),
386 mNumOfConsecutiveRDDOrGPUCrashes(0),
387 mMaxConsecutiveRDDOrGPUCrashes(
388 StaticPrefs::media_rdd_process_max_crashes()),
389 mNumOfConsecutiveUtilityCrashes(0),
390 mMaxConsecutiveUtilityCrashes(
391 StaticPrefs::media_utility_process_max_crashes()),
392 mFirstFrameTime(Some(media::TimeUnit::Zero())),
393 mNumSamplesInput(0),
394 mNumSamplesOutput(0),
395 mNumSamplesOutputTotal(0),
396 mNumSamplesSkippedTotal(0),
397 mSizeOfQueue(0),
398 mIsHardwareAccelerated(false),
399 mLastStreamSourceID(UINT32_MAX(4294967295U)),
400 mIsNullDecode(false),
401 mHardwareDecodingDisabled(false) {
402 DecoderDoctorLogger::LogConstruction("MediaFormatReader::DecoderData",
403 this);
404 }
405
406 ~DecoderData() {
407 DecoderDoctorLogger::LogDestruction("MediaFormatReader::DecoderData",
408 this);
409 }
410
411 MediaFormatReader* mOwner;
412 // Disambiguate Audio vs Video.
413 MediaData::Type mType;
414 RefPtr<MediaTrackDemuxer> mTrackDemuxer;
415 // TaskQueue on which decoder can choose to decode.
416 // Only non-null up until the decoder is created.
417 RefPtr<TaskQueue> mTaskQueue;
418
419 // Mutex protecting mDescription, mDecoder, mTrackDemuxer, mWorkingInfo,
420 // mProcessName and mCodecName as those can be read outside the TaskQueue.
421 // They are only written on the TaskQueue however, as such mMutex doesn't
422 // need to be held when those members are read on the TaskQueue.
423 Mutex mMutex MOZ_UNANNOTATED;
424 // The platform decoder.
425 RefPtr<MediaDataDecoder> mDecoder;
426 nsCString mDescription;
427 nsCString mProcessName;
428 nsCString mCodecName;
429 void ShutdownDecoder();
430
431 // Only accessed from reader's task queue.
432 bool mUpdateScheduled;
433 bool mDemuxEOS;
434 Maybe<TimeStamp> mWaitingForDataStartTime;
435 bool mWaitingForKey;
436 bool mReceivedNewData;
437 UniquePtr<PerformanceRecorderMulti<PlaybackStage>> mDecodePerfRecorder;
438
439 // Pending seek.
440 MozPromiseRequestHolder<MediaTrackDemuxer::SeekPromise> mSeekRequest;
441
442 // Queued demux samples waiting to be decoded.
443 nsTArray<RefPtr<MediaRawData>> mQueuedSamples;
444 MozPromiseRequestHolder<MediaTrackDemuxer::SamplesPromise> mDemuxRequest;
445 // A WaitingPromise is pending if the demuxer is waiting for data or
446 // if the decoder is waiting for a key.
447 MozPromiseHolder<WaitForDataPromise> mWaitingPromise;
448 bool HasWaitingPromise() const {
449 MOZ_ASSERT(mOwner->OnTaskQueue())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mOwner->OnTaskQueue())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mOwner->OnTaskQueue()))),
0))) { do { } while (false); MOZ_ReportAssertionFailure("mOwner->OnTaskQueue()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h"
, 449); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mOwner->OnTaskQueue()"
")"); do { *((volatile int*)__null) = 449; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
450 return !mWaitingPromise.IsEmpty();
451 }
452
453 bool IsWaitingForData() const {
454 MOZ_ASSERT(mOwner->OnTaskQueue())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mOwner->OnTaskQueue())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mOwner->OnTaskQueue()))),
0))) { do { } while (false); MOZ_ReportAssertionFailure("mOwner->OnTaskQueue()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h"
, 454); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mOwner->OnTaskQueue()"
")"); do { *((volatile int*)__null) = 454; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
455 return !!mWaitingForDataStartTime;
456 }
457
458 bool IsWaitingForKey() const {
459 MOZ_ASSERT(mOwner->OnTaskQueue())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mOwner->OnTaskQueue())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mOwner->OnTaskQueue()))),
0))) { do { } while (false); MOZ_ReportAssertionFailure("mOwner->OnTaskQueue()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h"
, 459); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mOwner->OnTaskQueue()"
")"); do { *((volatile int*)__null) = 459; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
460 return mWaitingForKey && mDecodeRequest.Exists();
461 }
462
463 // MediaDataDecoder handler's variables.
464 MozPromiseRequestHolder<MediaDataDecoder::DecodePromise> mDecodeRequest;
465 bool mFlushing; // True if flush is in action.
466 // Set to true if the last operation run on the decoder was a flush.
467 bool mFlushed;
468 RefPtr<SharedShutdownPromiseHolder> mShutdownPromise;
469
470 MozPromiseRequestHolder<MediaDataDecoder::DecodePromise> mDrainRequest;
471 DrainState mDrainState;
472 bool HasPendingDrain() const { return mDrainState != DrainState::None; }
473 bool HasCompletedDrain() const {
474 return mDrainState == DrainState::DrainCompleted ||
475 mDrainState == DrainState::DrainAborted;
476 }
477 void RequestDrain() {
478 MOZ_RELEASE_ASSERT(mDrainState == DrainState::None)do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mDrainState == DrainState::None)>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mDrainState == DrainState::None
))), 0))) { do { } while (false); MOZ_ReportAssertionFailure(
"mDrainState == DrainState::None", "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h"
, 478); AnnotateMozCrashReason("MOZ_RELEASE_ASSERT" "(" "mDrainState == DrainState::None"
")"); do { *((volatile int*)__null) = 478; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
479 mDrainState = DrainState::DrainRequested;
480 }
481
482 void StartRecordDecodingPerf(const TrackType aTrack,
483 const MediaRawData* aSample);
484
485 // Track decoding error and fail when we hit the limit.
486 uint32_t mNumOfConsecutiveDecodingError;
487 uint32_t mMaxConsecutiveDecodingError;
488
489 // Track RDD or GPU process crashes and fail when we hit the limit.
490 uint32_t mNumOfConsecutiveRDDOrGPUCrashes;
491 uint32_t mMaxConsecutiveRDDOrGPUCrashes;
492
493 // Track Utility process crashes and fail when we hit the limit.
494 uint32_t mNumOfConsecutiveUtilityCrashes;
495 uint32_t mMaxConsecutiveUtilityCrashes;
496
497 // Set when we haven't yet decoded the first frame.
498 // Cleared once the first frame has been decoded.
499 // This is used to determine, upon error, if we should try again to decode
500 // the frame, or skip to the next keyframe.
501 Maybe<media::TimeUnit> mFirstFrameTime;
502
503 Maybe<MediaResult> mError;
504 bool HasFatalError() const {
505 if (!mError.isSome()) {
506 return false;
507 }
508 if (mError.ref() == NS_ERROR_DOM_MEDIA_DECODE_ERR) {
509 // Allow decode errors to be non-fatal, but give up
510 // if we have too many, or if warnings should be treated as errors.
511 return mNumOfConsecutiveDecodingError > mMaxConsecutiveDecodingError ||
512 StaticPrefs::media_playback_warnings_as_errors();
513 }
514 if (mError.ref() == NS_ERROR_DOM_MEDIA_NEED_NEW_DECODER) {
515 // If the caller asked for a new decoder we shouldn't treat
516 // it as fatal.
517 return false;
518 }
519 if (mError.ref() ==
520 NS_ERROR_DOM_MEDIA_REMOTE_DECODER_CRASHED_RDD_OR_GPU_ERR) {
521 // Allow RDD crashes to be non-fatal, but give up
522 // if we have too many, or if warnings should be treated as errors.
523 return mNumOfConsecutiveRDDOrGPUCrashes >
524 mMaxConsecutiveRDDOrGPUCrashes ||
525 StaticPrefs::media_playback_warnings_as_errors();
526 }
527 if (mError.ref() ==
528 NS_ERROR_DOM_MEDIA_REMOTE_DECODER_CRASHED_UTILITY_ERR) {
529 bool tooManyConsecutiveCrashes =
530 mNumOfConsecutiveUtilityCrashes > mMaxConsecutiveUtilityCrashes;
531 // TODO: Telemetry?
532 return tooManyConsecutiveCrashes ||
533 StaticPrefs::media_playback_warnings_as_errors();
534 }
535 if (mError.ref() ==
536 NS_ERROR_DOM_MEDIA_REMOTE_DECODER_CRASHED_MF_CDM_ERR) {
537 return false;
538 }
539 // All other error types are fatal
540 return true;
541 }
542
543 // If set, all decoded samples prior mTimeThreshold will be dropped.
544 // Used for internal seeking when a change of stream is detected or when
545 // encountering data discontinuity.
546 Maybe<InternalSeekTarget> mTimeThreshold;
547 // Time of last decoded sample returned.
548 Maybe<media::TimeInterval> mLastDecodedSampleTime;
549
550 // Decoded samples returned my mDecoder awaiting being returned to
551 // state machine upon request.
552 nsTArray<RefPtr<MediaData>> mOutput;
553 uint64_t mNumSamplesInput;
554 uint64_t mNumSamplesOutput;
555 uint64_t mNumSamplesOutputTotal;
556 uint64_t mNumSamplesSkippedTotal;
557
558 // These get overridden in the templated concrete class.
559 // Indicate if we have a pending promise for decoded frame.
560 // Rejecting the promise will stop the reader from decoding ahead.
561 virtual bool HasPromise() const = 0;
562 virtual void RejectPromise(const MediaResult& aError,
563 StaticString aMethodName) = 0;
564
565 // Clear track demuxer related data.
566 void ResetDemuxer() {
567 mDemuxRequest.DisconnectIfExists();
568 mSeekRequest.DisconnectIfExists();
569 mTrackDemuxer->Reset();
570 mQueuedSamples.Clear();
571 }
572
573 // Flush the decoder if present and reset decoding related data.
574 // Following a flush, the decoder is ready to accept any new data.
575 void Flush();
576
577 bool CancelWaitingForKey() {
578 if (!mWaitingForKey) {
579 return false;
580 }
581 mWaitingForKey = false;
582 if (IsWaitingForData() || !HasWaitingPromise()) {
583 return false;
584 }
585 mWaitingPromise.Resolve(mType, __func__);
586 return true;
587 }
588
589 // Reset the state of the DecoderData, clearing all queued frames
590 // (pending demuxed and decoded).
591 // The track demuxer is *not* reset.
592 void ResetState() {
593 MOZ_ASSERT(mOwner->OnTaskQueue())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mOwner->OnTaskQueue())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mOwner->OnTaskQueue()))),
0))) { do { } while (false); MOZ_ReportAssertionFailure("mOwner->OnTaskQueue()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h"
, 593); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mOwner->OnTaskQueue()"
")"); do { *((volatile int*)__null) = 593; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
594 mDemuxEOS = false;
595 mWaitingForDataStartTime.reset();
596 mQueuedSamples.Clear();
597 mDecodeRequest.DisconnectIfExists();
598 mDrainRequest.DisconnectIfExists();
599 mDrainState = DrainState::None;
600 CancelWaitingForKey();
601 mTimeThreshold.reset();
602 mLastDecodedSampleTime.reset();
603 mOutput.Clear();
604 mNumSamplesInput = 0;
605 mNumSamplesOutput = 0;
606 mSizeOfQueue = 0;
607 mNextStreamSourceID.reset();
608 if (!HasFatalError()) {
609 mError.reset();
610 }
611 }
612
613 bool HasInternalSeekPending() const {
614 return mTimeThreshold && !mTimeThreshold.ref().mHasSeeked;
615 }
616
617 // Return the current TrackInfo in the stream. If the stream content never
618 // changed since AsyncReadMetadata was called then the TrackInfo used is
619 // mOriginalInfo, other it will be mInfo. The later case is only ever true
620 // with MSE or the WebMDemuxer.
621 const TrackInfo* GetCurrentInfo() const {
622 if (mInfo) {
623 return *mInfo;
624 }
625 return mOriginalInfo.get();
626 }
627 // Return the current TrackInfo updated as per the decoder output.
628 // Typically for audio, the number of channels and/or sampling rate can vary
629 // between what was found in the metadata and what the decoder returned.
630 const TrackInfo* GetWorkingInfo() const { return mWorkingInfo.get(); }
631 bool IsEncrypted() const { return GetCurrentInfo()->mCrypto.IsEncrypted(); }
632
633 // Used by the MDSM for logging purposes.
634 Atomic<size_t> mSizeOfQueue;
635 // Used by the MDSM to determine if video decoding is hardware accelerated.
636 // This value is updated after a frame is successfully decoded.
637 Atomic<bool> mIsHardwareAccelerated;
638 // Sample format monitoring.
639 uint32_t mLastStreamSourceID;
640 Maybe<uint32_t> mNextStreamSourceID;
641 media::TimeIntervals mTimeRanges;
642 Maybe<media::TimeUnit> mLastTimeRangesEnd;
643 // TrackInfo as first discovered during ReadMetadata.
644 UniquePtr<TrackInfo> mOriginalInfo;
645 // Written exclusively on the TaskQueue, can be read on MDSM's TaskQueue.
646 // Must be read with parent's mutex held.
647 UniquePtr<TrackInfo> mWorkingInfo;
648 RefPtr<TrackInfoSharedPtr> mInfo;
649 Maybe<media::TimeUnit> mFirstDemuxedSampleTime;
650 // Use NullDecoderModule or not.
651 bool mIsNullDecode;
652 bool mHardwareDecodingDisabled;
653 // Whether we have reported hardware decoding support for video. Used only
654 // on reader's task queue,
655 bool mHasReportedVideoHardwareSupportTelemtry = false;
656
657 class {
658 public:
659 float Mean() const { return mMean; }
660
661 void Update(const media::TimeUnit& aValue) {
662 if (aValue == media::TimeUnit::Zero()) {
663 return;
664 }
665 mMean += static_cast<float>((1.0f / aValue.ToSeconds() - mMean) /
666 static_cast<double>(++mCount));
667 }
668
669 void Reset() {
670 mMean = 0;
671 mCount = 0;
672 }
673
674 private:
675 float mMean = 0;
676 uint64_t mCount = 0;
677 } mMeanRate;
678 };
679
680 template <typename Type>
681 class DecoderDataWithPromise : public DecoderData {
682 public:
683 DecoderDataWithPromise(MediaFormatReader* aOwner, MediaData::Type aType,
684 uint32_t aNumOfMaxError)
685 : DecoderData(aOwner, aType, aNumOfMaxError), mHasPromise(false) {
686 DecoderDoctorLogger::LogConstructionAndBase(
687 "MediaFormatReader::DecoderDataWithPromise", this,
688 "MediaFormatReader::DecoderData",
689 static_cast<const MediaFormatReader::DecoderData*>(this));
690 }
691
692 ~DecoderDataWithPromise() {
693 DecoderDoctorLogger::LogDestruction(
694 "MediaFormatReader::DecoderDataWithPromise", this);
695 }
696
697 bool HasPromise() const override { return mHasPromise; }
698
699 RefPtr<DataPromise<Type>> EnsurePromise(StaticString aMethodName) {
700 MOZ_ASSERT(mOwner->OnTaskQueue())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mOwner->OnTaskQueue())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mOwner->OnTaskQueue()))),
0))) { do { } while (false); MOZ_ReportAssertionFailure("mOwner->OnTaskQueue()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h"
, 700); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mOwner->OnTaskQueue()"
")"); do { *((volatile int*)__null) = 700; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
701 mHasPromise = true;
702 return mPromise.Ensure(aMethodName);
703 }
704
705 void ResolvePromise(Type* aData, StaticString aMethodName) {
706 MOZ_ASSERT(mOwner->OnTaskQueue())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mOwner->OnTaskQueue())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mOwner->OnTaskQueue()))),
0))) { do { } while (false); MOZ_ReportAssertionFailure("mOwner->OnTaskQueue()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h"
, 706); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mOwner->OnTaskQueue()"
")"); do { *((volatile int*)__null) = 706; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
707 mPromise.Resolve(aData, aMethodName);
708 mHasPromise = false;
709 }
710
711 void RejectPromise(const MediaResult& aError,
712 StaticString aMethodName) override {
713 MOZ_ASSERT(mOwner->OnTaskQueue())do { static_assert( mozilla::detail::AssertionConditionType<
decltype(mOwner->OnTaskQueue())>::isValid, "invalid assertion condition"
); if ((__builtin_expect(!!(!(!!(mOwner->OnTaskQueue()))),
0))) { do { } while (false); MOZ_ReportAssertionFailure("mOwner->OnTaskQueue()"
, "/var/lib/jenkins/workspace/firefox-scan-build/dom/media/MediaFormatReader.h"
, 713); AnnotateMozCrashReason("MOZ_ASSERT" "(" "mOwner->OnTaskQueue()"
")"); do { *((volatile int*)__null) = 713; __attribute__((nomerge
)) ::abort(); } while (false); } } while (false);
714 mPromise.Reject(aError, aMethodName);
715 mHasPromise = false;
716 }
717
718 private:
719 MozPromiseHolder<DataPromise<Type>> mPromise;
720 Atomic<bool> mHasPromise;
721 };
722
723 // Decode task queue.
724 RefPtr<TaskQueue> mTaskQueue;
725
726 DecoderDataWithPromise<AudioData> mAudio;
727 DecoderDataWithPromise<VideoData> mVideo;
728
729 Watchable<bool> mWorkingInfoChanged;
730 WatchManager<MediaFormatReader> mWatchManager;
731 bool mIsWatchingWorkingInfo;
732
733 // Returns true when the decoder for this track needs input.
734 bool NeedInput(DecoderData& aDecoder);
735
736 DecoderData& GetDecoderData(TrackType aTrack);
737
738 // Demuxer objects.
739 class DemuxerProxy;
740 UniquePtr<DemuxerProxy> mDemuxer;
741 bool mDemuxerInitDone;
742 void OnDemuxerInitDone(const MediaResult& aResult);
743 void OnDemuxerInitFailed(const MediaResult& aError);
744 MozPromiseRequestHolder<MediaDataDemuxer::InitPromise> mDemuxerInitRequest;
745 MozPromiseRequestHolder<NotifyDataArrivedPromise> mNotifyDataArrivedPromise;
746 bool mPendingNotifyDataArrived;
747 void OnDemuxFailed(TrackType aTrack, const MediaResult& aError);
748
749 void DoDemuxVideo();
750 void OnVideoDemuxCompleted(
751 const RefPtr<MediaTrackDemuxer::SamplesHolder>& aSamples);
752 void OnVideoDemuxFailed(const MediaResult& aError) {
753 OnDemuxFailed(TrackType::kVideoTrack, aError);
754 }
755
756 void DoDemuxAudio();
757 void OnAudioDemuxCompleted(
758 const RefPtr<MediaTrackDemuxer::SamplesHolder>& aSamples);
759 void OnAudioDemuxFailed(const MediaResult& aError) {
760 OnDemuxFailed(TrackType::kAudioTrack, aError);
761 }
762
763 void SkipVideoDemuxToNextKeyFrame(media::TimeUnit aTimeThreshold);
764 MozPromiseRequestHolder<MediaTrackDemuxer::SkipAccessPointPromise>
765 mSkipRequest;
766 void VideoSkipReset(uint32_t aSkipped);
767 void OnVideoSkipCompleted(uint32_t aSkipped);
768 void OnVideoSkipFailed(MediaTrackDemuxer::SkipFailureHolder aFailure);
769
770 // The last number of decoded output frames that we've reported to
771 // MediaDecoder::NotifyDecoded(). We diff the number of output video
772 // frames every time that DecodeVideoData() is called, and report the
773 // delta there.
774 uint64_t mLastReportedNumDecodedFrames;
775
776 // Timestamp of the previous decoded keyframe, in microseconds.
777 int64_t mPreviousDecodedKeyframeTime_us;
778 // Default mLastDecodedKeyframeTime_us value, must be bigger than anything.
779 static const int64_t sNoPreviousDecodedKeyframe = INT64_MAX(9223372036854775807L);
780
781 RefPtr<layers::KnowsCompositor> mKnowsCompositor;
782
783 // Metadata objects
784 // True if we've read the streams' metadata.
785 bool mInitDone;
786 MozPromiseHolder<MetadataPromise> mMetadataPromise;
787 bool IsEncrypted() const;
788
789 // Set to true if any of our track buffers may be blocking.
790 bool mTrackDemuxersMayBlock;
791
792 // Seeking objects.
793 void SetSeekTarget(const SeekTarget& aTarget);
794 bool IsSeeking() const { return mPendingSeekTime.isSome(); }
795 bool IsVideoOnlySeeking() const {
796 return IsSeeking() && mOriginalSeekTarget.IsVideoOnly();
797 }
798 bool IsAudioOnlySeeking() const {
799 return IsSeeking() && mOriginalSeekTarget.IsAudioOnly();
800 }
801 void ScheduleSeek();
802 void AttemptSeek();
803 void OnSeekFailed(TrackType aTrack, const MediaResult& aError);
804 void DoVideoSeek();
805 void OnVideoSeekCompleted(media::TimeUnit aTime);
806 void OnVideoSeekFailed(const MediaResult& aError);
807 bool mSeekScheduled;
808
809 void DoAudioSeek();
810 void OnAudioSeekCompleted(media::TimeUnit aTime);
811 void OnAudioSeekFailed(const MediaResult& aError);
812 // The SeekTarget that was last given to Seek()
813 SeekTarget mOriginalSeekTarget;
814 // Temporary seek information while we wait for the data
815 Maybe<media::TimeUnit> mFallbackSeekTime;
816 Maybe<media::TimeUnit> mPendingSeekTime;
817 MozPromiseHolder<SeekPromise> mSeekPromise;
818
819 RefPtr<VideoFrameContainer> mVideoFrameContainer;
820 layers::ImageContainer* GetImageContainer();
821
822 RefPtr<CDMProxy> mCDMProxy;
823
824 RefPtr<GMPCrashHelper> mCrashHelper;
825
826 void SetNullDecode(TrackType aTrack, bool aIsNullDecode);
827
828 class DecoderFactory;
829 UniquePtr<DecoderFactory> mDecoderFactory;
830
831 class ShutdownPromisePool;
832 UniquePtr<ShutdownPromisePool> mShutdownPromisePool;
833
834 MediaEventListener mOnTrackWaitingForKeyListener;
835
836 void OnFirstDemuxCompleted(
837 TrackInfo::TrackType aType,
838 const RefPtr<MediaTrackDemuxer::SamplesHolder>& aSamples);
839
840 void OnFirstDemuxFailed(TrackInfo::TrackType aType,
841 const MediaResult& aError);
842
843 void MaybeResolveMetadataPromise();
844
845 // Stores presentation info required for playback.
846 MediaInfo mInfo;
847
848 UniquePtr<MetadataTags> mTags;
849
850 // A flag indicating if the start time is known or not.
851 bool mHasStartTime = false;
852
853 void ShutdownDecoder(TrackType aTrack);
854 RefPtr<ShutdownPromise> TearDownDecoders();
855
856 bool mShutdown = false;
857
858 // Buffered range.
859 Canonical<media::TimeIntervals> mBuffered;
860
861 // Used to send TimedMetadata to the listener.
862 TimedMetadataEventProducer mTimedMetadataEvent;
863
864 // Notify if this media is not seekable.
865 MediaEventProducer<void> mOnMediaNotSeekable;
866
867 // Notify if we are waiting for a decryption key.
868 MediaEventProducer<TrackInfo::TrackType> mOnTrackWaitingForKey;
869
870 MediaEventProducer<nsTArray<uint8_t>, nsString> mOnEncrypted;
871
872 MediaEventProducer<void> mOnWaitingForKey;
873
874 MediaEventProducer<MediaResult> mOnDecodeWarning;
875
876 MediaEventProducer<VideoInfo> mOnStoreDecoderBenchmark;
877
878 MediaEventProducer<VideoInfo, AudioInfo> mTrackInfoUpdatedEvent;
879
880 RefPtr<FrameStatistics> mFrameStats;
881
882 // Used in bug 1393399 for telemetry.
883 const MediaDecoderOwnerID mMediaDecoderOwnerID;
884
885 bool ResolveSetCDMPromiseIfDone(TrackType aTrack);
886 void PrepareToSetCDMForTrack(TrackType aTrack);
887 MozPromiseHolder<SetCDMPromise> mSetCDMPromise;
888 TrackSet mSetCDMForTracks{};
889 bool IsDecoderWaitingForCDM(TrackType aTrack);
890
891 void GetDebugInfo(dom::MediaFormatReaderDebugInfo& aInfo);
892
893 // Only be used on Windows when the media engine playback is enabled.
894 Maybe<uint64_t> mMediaEngineId;
895
896 const Maybe<TrackingId> mTrackingId;
897
898 // The start time of reading the metdata and how long does it take. This
899 // measurement includes the time of downloading media resource over the
900 // internet.
901 Maybe<TimeStamp> mReadMetadataStartTime;
902 TimeDuration mReadMetaDataTime;
903
904 // The total amount of time we have been waiting for the video data due to
905 // lacking of data.
906 TimeDuration mTotalWaitingForVideoDataTime;
907
908 // https://github.com/w3c/encrypted-media/issues/251#issuecomment-819783073
909 // Treat playback as encrypted if the media key is set before playback starts,
910 // this allows websites to start with non-encrypted stream and switch to
911 // encrypted stream later.
912 Atomic<bool> mEncryptedCustomIdent;
913};
914
915} // namespace mozilla
916
917#endif