| File: | root/firefox-clang/media/ffvpx/libavcodec/mpegaudiodec_template.c |
| Warning: | line 77, column 16 Excessive padding in 'struct MPADecodeContext' (36 padding bytes, where 4 is optimal). Optimal fields order: synth_buf, sb_samples, granules, avctx, butterflies_float, frame, gb, in_gb, mpadsp, frame_size, error_protection, layer, sample_rate, sample_rate_index, bit_rate, nb_channels, mode, mode_ext, lsf, last_buf_size, extrasize, free_format_next_header, adu_mode, dither_state, err_recognition, crc, synth_buf_offset, mdct_buf, last_buf, consider reordering the fields or adding explicit padding members |
Press '?' to see keyboard shortcuts
Keyboard shortcuts:
| 1 | /* |
| 2 | * MPEG Audio decoder |
| 3 | * Copyright (c) 2001, 2002 Fabrice Bellard |
| 4 | * |
| 5 | * This file is part of FFmpeg. |
| 6 | * |
| 7 | * FFmpeg is free software; you can redistribute it and/or |
| 8 | * modify it under the terms of the GNU Lesser General Public |
| 9 | * License as published by the Free Software Foundation; either |
| 10 | * version 2.1 of the License, or (at your option) any later version. |
| 11 | * |
| 12 | * FFmpeg is distributed in the hope that it will be useful, |
| 13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 15 | * Lesser General Public License for more details. |
| 16 | * |
| 17 | * You should have received a copy of the GNU Lesser General Public |
| 18 | * License along with FFmpeg; if not, write to the Free Software |
| 19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 20 | */ |
| 21 | |
| 22 | /** |
| 23 | * @file |
| 24 | * MPEG Audio decoder |
| 25 | */ |
| 26 | |
| 27 | #include "config_components.h" |
| 28 | |
| 29 | #include "libavutil/attributes.h" |
| 30 | #include "libavutil/avassert.h" |
| 31 | #include "libavutil/channel_layout.h" |
| 32 | #include "libavutil/crc.h" |
| 33 | #include "libavutil/float_dsp.h" |
| 34 | #include "libavutil/libm.h" |
| 35 | #include "libavutil/mem.h" |
| 36 | #include "libavutil/mem_internal.h" |
| 37 | #include "libavutil/thread.h" |
| 38 | |
| 39 | #include "avcodec.h" |
| 40 | #include "decode.h" |
| 41 | #include "get_bits.h" |
| 42 | #include "mathops.h" |
| 43 | #include "mpegaudiodsp.h" |
| 44 | |
| 45 | /* |
| 46 | * TODO: |
| 47 | * - test lsf / mpeg25 extensively. |
| 48 | */ |
| 49 | |
| 50 | #include "mpegaudio.h" |
| 51 | #include "mpegaudiodecheader.h" |
| 52 | |
| 53 | #define BACKSTEP_SIZE512 512 |
| 54 | #define EXTRABYTES24 24 |
| 55 | #define LAST_BUF_SIZE2 * 512 + 24 2 * BACKSTEP_SIZE512 + EXTRABYTES24 |
| 56 | |
| 57 | /* layer 3 "granule" */ |
| 58 | typedef struct GranuleDef { |
| 59 | uint8_t scfsi; |
| 60 | int part2_3_length; |
| 61 | int big_values; |
| 62 | int global_gain; |
| 63 | int scalefac_compress; |
| 64 | uint8_t block_type; |
| 65 | uint8_t switch_point; |
| 66 | int table_select[3]; |
| 67 | int subblock_gain[3]; |
| 68 | uint8_t scalefac_scale; |
| 69 | uint8_t count1table_select; |
| 70 | int region_size[3]; /* number of huffman codes in each region */ |
| 71 | int preflag; |
| 72 | int short_start, long_end; /* long/short band indexes */ |
| 73 | uint8_t scale_factors[40]; |
| 74 | DECLARE_ALIGNED(16, INTFLOAT, sb_hybrid)_Alignas(16) int sb_hybrid[SBLIMIT32 * 18]; /* 576 samples */ |
| 75 | } GranuleDef; |
| 76 | |
| 77 | typedef struct MPADecodeContext { |
Excessive padding in 'struct MPADecodeContext' (36 padding bytes, where 4 is optimal). Optimal fields order: synth_buf, sb_samples, granules, avctx, butterflies_float, frame, gb, in_gb, mpadsp, frame_size, error_protection, layer, sample_rate, sample_rate_index, bit_rate, nb_channels, mode, mode_ext, lsf, last_buf_size, extrasize, free_format_next_header, adu_mode, dither_state, err_recognition, crc, synth_buf_offset, mdct_buf, last_buf, consider reordering the fields or adding explicit padding members | |
| 78 | MPA_DECODE_HEADERint frame_size; int error_protection; int layer; int sample_rate ; int sample_rate_index; int bit_rate; int nb_channels; int mode ; int mode_ext; int lsf; |
| 79 | uint8_t last_buf[LAST_BUF_SIZE2 * 512 + 24]; |
| 80 | int last_buf_size; |
| 81 | int extrasize; |
| 82 | /* next header (used in free format parsing) */ |
| 83 | uint32_t free_format_next_header; |
| 84 | GetBitContext gb; |
| 85 | GetBitContext in_gb; |
| 86 | DECLARE_ALIGNED(32, MPA_INT, synth_buf)_Alignas(32) MPA_INT synth_buf[MPA_MAX_CHANNELS2][512 * 2]; |
| 87 | int synth_buf_offset[MPA_MAX_CHANNELS2]; |
| 88 | DECLARE_ALIGNED(32, INTFLOAT, sb_samples)_Alignas(32) int sb_samples[MPA_MAX_CHANNELS2][36][SBLIMIT32]; |
| 89 | INTFLOATint mdct_buf[MPA_MAX_CHANNELS2][SBLIMIT32 * 18]; /* previous samples, for layer 3 MDCT */ |
| 90 | GranuleDef granules[2][2]; /* Used in Layer 3 */ |
| 91 | int adu_mode; ///< 0 for standard mp3, 1 for adu formatted mp3 |
| 92 | int dither_state; |
| 93 | int err_recognition; |
| 94 | AVCodecContext* avctx; |
| 95 | MPADSPContext mpadsp; |
| 96 | void (*butterflies_float)(float *restrict v1, float *restrict v2, int len); |
| 97 | AVFrame *frame; |
| 98 | uint32_t crc; |
| 99 | } MPADecodeContext; |
| 100 | |
| 101 | #define HEADER_SIZE4 4 |
| 102 | |
| 103 | #include "mpegaudiodata.h" |
| 104 | |
| 105 | #include "mpegaudio_tablegen.h" |
| 106 | /* intensity stereo coef table */ |
| 107 | static INTFLOATint is_table_lsf[2][2][16]; |
| 108 | |
| 109 | /* [i][j]: 2^(-j/3) * FRAC_ONE * 2^(i+2) / (2^(i+2) - 1) */ |
| 110 | static int32_t scale_factor_mult[15][3]; |
| 111 | /* mult table for layer 2 group quantization */ |
| 112 | |
| 113 | #define SCALE_GEN(v){ ((int)((1.0 * (v)) * (1 << 23) + 0.5)), ((int)((0.7937005259 * (v)) * (1 << 23) + 0.5)), ((int)((0.6299605249 * (v) ) * (1 << 23) + 0.5)) } \ |
| 114 | { FIXR_OLD(1.0 * (v))((int)((1.0 * (v)) * (1 << 23) + 0.5)), FIXR_OLD(0.7937005259 * (v))((int)((0.7937005259 * (v)) * (1 << 23) + 0.5)), FIXR_OLD(0.6299605249 * (v))((int)((0.6299605249 * (v)) * (1 << 23) + 0.5)) } |
| 115 | |
| 116 | static const int32_t scale_factor_mult2[3][3] = { |
| 117 | SCALE_GEN(4.0 / 3.0){ ((int)((1.0 * (4.0 / 3.0)) * (1 << 23) + 0.5)), ((int )((0.7937005259 * (4.0 / 3.0)) * (1 << 23) + 0.5)), ((int )((0.6299605249 * (4.0 / 3.0)) * (1 << 23) + 0.5)) }, /* 3 steps */ |
| 118 | SCALE_GEN(4.0 / 5.0){ ((int)((1.0 * (4.0 / 5.0)) * (1 << 23) + 0.5)), ((int )((0.7937005259 * (4.0 / 5.0)) * (1 << 23) + 0.5)), ((int )((0.6299605249 * (4.0 / 5.0)) * (1 << 23) + 0.5)) }, /* 5 steps */ |
| 119 | SCALE_GEN(4.0 / 9.0){ ((int)((1.0 * (4.0 / 9.0)) * (1 << 23) + 0.5)), ((int )((0.7937005259 * (4.0 / 9.0)) * (1 << 23) + 0.5)), ((int )((0.6299605249 * (4.0 / 9.0)) * (1 << 23) + 0.5)) }, /* 9 steps */ |
| 120 | }; |
| 121 | |
| 122 | /** |
| 123 | * Convert region offsets to region sizes and truncate |
| 124 | * size to big_values. |
| 125 | */ |
| 126 | static void region_offset2size(GranuleDef *g) |
| 127 | { |
| 128 | int i, k, j = 0; |
| 129 | g->region_size[2] = 576 / 2; |
| 130 | for (i = 0; i < 3; i++) { |
| 131 | k = FFMIN(g->region_size[i], g->big_values)((g->region_size[i]) > (g->big_values) ? (g->big_values ) : (g->region_size[i])); |
| 132 | g->region_size[i] = k - j; |
| 133 | j = k; |
| 134 | } |
| 135 | } |
| 136 | |
| 137 | static void init_short_region(MPADecodeContext *s, GranuleDef *g) |
| 138 | { |
| 139 | if (g->block_type == 2) { |
| 140 | if (s->sample_rate_index != 8) |
| 141 | g->region_size[0] = (36 / 2); |
| 142 | else |
| 143 | g->region_size[0] = (72 / 2); |
| 144 | } else { |
| 145 | if (s->sample_rate_index <= 2) |
| 146 | g->region_size[0] = (36 / 2); |
| 147 | else if (s->sample_rate_index != 8) |
| 148 | g->region_size[0] = (54 / 2); |
| 149 | else |
| 150 | g->region_size[0] = (108 / 2); |
| 151 | } |
| 152 | g->region_size[1] = (576 / 2); |
| 153 | } |
| 154 | |
| 155 | static void init_long_region(MPADecodeContext *s, GranuleDef *g, |
| 156 | int ra1, int ra2) |
| 157 | { |
| 158 | int l; |
| 159 | g->region_size[0] = ff_band_index_long[s->sample_rate_index][ra1 + 1]; |
| 160 | /* should not overflow */ |
| 161 | l = FFMIN(ra1 + ra2 + 2, 22)((ra1 + ra2 + 2) > (22) ? (22) : (ra1 + ra2 + 2)); |
| 162 | g->region_size[1] = ff_band_index_long[s->sample_rate_index][ l]; |
| 163 | } |
| 164 | |
| 165 | static void compute_band_indexes(MPADecodeContext *s, GranuleDef *g) |
| 166 | { |
| 167 | if (g->block_type == 2) { |
| 168 | if (g->switch_point) { |
| 169 | if(s->sample_rate_index == 8) |
| 170 | avpriv_request_sample(s->avctx, "switch point in 8khz"); |
| 171 | /* if switched mode, we handle the 36 first samples as |
| 172 | long blocks. For 8000Hz, we handle the 72 first |
| 173 | exponents as long blocks */ |
| 174 | if (s->sample_rate_index <= 2) |
| 175 | g->long_end = 8; |
| 176 | else |
| 177 | g->long_end = 6; |
| 178 | |
| 179 | g->short_start = 3; |
| 180 | } else { |
| 181 | g->long_end = 0; |
| 182 | g->short_start = 0; |
| 183 | } |
| 184 | } else { |
| 185 | g->short_start = 13; |
| 186 | g->long_end = 22; |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | /* layer 1 unscaling */ |
| 191 | /* n = number of bits of the mantissa minus 1 */ |
| 192 | static inline int l1_unscale(int n, int mant, int scale_factor) |
| 193 | { |
| 194 | int shift, mod; |
| 195 | int64_t val; |
| 196 | |
| 197 | shift = ff_scale_factor_modshift[scale_factor]; |
| 198 | mod = shift & 3; |
| 199 | shift >>= 2; |
| 200 | val = MUL64((int)(mant + (-1U << n) + 1), scale_factor_mult[n-1][mod])((int64_t)((int)(mant + (-1U << n) + 1)) * (int64_t)(scale_factor_mult [n-1][mod])); |
| 201 | shift += n; |
| 202 | /* NOTE: at this point, 1 <= shift >= 21 + 15 */ |
| 203 | return (int)((val + (1LL << (shift - 1))) >> shift); |
| 204 | } |
| 205 | |
| 206 | static inline int l2_unscale_group(int steps, int mant, int scale_factor) |
| 207 | { |
| 208 | int shift, mod, val; |
| 209 | |
| 210 | shift = ff_scale_factor_modshift[scale_factor]; |
| 211 | mod = shift & 3; |
| 212 | shift >>= 2; |
| 213 | |
| 214 | val = (mant - (steps >> 1)) * scale_factor_mult2[steps >> 2][mod]; |
| 215 | /* NOTE: at this point, 0 <= shift <= 21 */ |
| 216 | if (shift > 0) |
| 217 | val = (val + (1 << (shift - 1))) >> shift; |
| 218 | return val; |
| 219 | } |
| 220 | |
| 221 | /* compute value^(4/3) * 2^(exponent/4). It normalized to FRAC_BITS */ |
| 222 | static inline int l3_unscale(int value, int exponent) |
| 223 | { |
| 224 | unsigned int m; |
| 225 | int e; |
| 226 | |
| 227 | e = ff_table_4_3_exp [4 * value + (exponent & 3)]; |
| 228 | m = ff_table_4_3_value[4 * value + (exponent & 3)]; |
| 229 | e -= exponent >> 2; |
| 230 | #ifdef DEBUG1 |
| 231 | if(e < 1) |
| 232 | av_log(NULL((void*)0), AV_LOG_WARNING24, "l3_unscale: e is %d\n", e); |
| 233 | #endif |
| 234 | if (e > (SUINTunsigned)31) |
| 235 | return 0; |
| 236 | m = (m + ((1U << e) >> 1)) >> e; |
| 237 | |
| 238 | return m; |
| 239 | } |
| 240 | |
| 241 | static av_cold__attribute__((cold)) void decode_init_static(void) |
| 242 | { |
| 243 | int i, j; |
| 244 | |
| 245 | /* scale factor multiply for layer 1 */ |
| 246 | for (i = 0; i < 15; i++) { |
| 247 | int n, norm; |
| 248 | n = i + 2; |
| 249 | norm = ((INT64_C(1)1L << n) * FRAC_ONE(1 << 23)) / ((1 << n) - 1); |
| 250 | scale_factor_mult[i][0] = MULLx(norm, FIXR(1.0 * 2.0), FRAC_BITS)(((int64_t)((int)(norm)) * (int64_t)((((int)((1.0 * 2.0) * (1 << 23) + 0.5))))) >> (23)); |
| 251 | scale_factor_mult[i][1] = MULLx(norm, FIXR(0.7937005259 * 2.0), FRAC_BITS)(((int64_t)((int)(norm)) * (int64_t)((((int)((0.7937005259 * 2.0 ) * (1 << 23) + 0.5))))) >> (23)); |
| 252 | scale_factor_mult[i][2] = MULLx(norm, FIXR(0.6299605249 * 2.0), FRAC_BITS)(((int64_t)((int)(norm)) * (int64_t)((((int)((0.6299605249 * 2.0 ) * (1 << 23) + 0.5))))) >> (23)); |
| 253 | ff_dlog(NULL, "%d: norm=%x s=%"PRIx32" %"PRIx32" %"PRIx32"\n", i,av_log(((void*)0), 48, "%d: norm=%x s=%""x"" %""x"" %""x""\n" , i, (unsigned)norm, scale_factor_mult[i][0], scale_factor_mult [i][1], scale_factor_mult[i][2]) |
| 254 | (unsigned)norm,av_log(((void*)0), 48, "%d: norm=%x s=%""x"" %""x"" %""x""\n" , i, (unsigned)norm, scale_factor_mult[i][0], scale_factor_mult [i][1], scale_factor_mult[i][2]) |
| 255 | scale_factor_mult[i][0],av_log(((void*)0), 48, "%d: norm=%x s=%""x"" %""x"" %""x""\n" , i, (unsigned)norm, scale_factor_mult[i][0], scale_factor_mult [i][1], scale_factor_mult[i][2]) |
| 256 | scale_factor_mult[i][1],av_log(((void*)0), 48, "%d: norm=%x s=%""x"" %""x"" %""x""\n" , i, (unsigned)norm, scale_factor_mult[i][0], scale_factor_mult [i][1], scale_factor_mult[i][2]) |
| 257 | scale_factor_mult[i][2])av_log(((void*)0), 48, "%d: norm=%x s=%""x"" %""x"" %""x""\n" , i, (unsigned)norm, scale_factor_mult[i][0], scale_factor_mult [i][1], scale_factor_mult[i][2]); |
| 258 | } |
| 259 | |
| 260 | /* compute n ^ (4/3) and store it in mantissa/exp format */ |
| 261 | |
| 262 | mpegaudio_tableinit(); |
| 263 | |
| 264 | for (i = 0; i < 16; i++) { |
| 265 | double f; |
| 266 | int e, k; |
| 267 | |
| 268 | for (j = 0; j < 2; j++) { |
| 269 | e = -(j + 1) * ((i + 1) >> 1); |
| 270 | f = exp2fdlibm_exp2(e / 4.0); |
| 271 | k = i & 1; |
| 272 | is_table_lsf[j][k ^ 1][i] = FIXR(f)((int)((f) * (1 << 23) + 0.5)); |
| 273 | is_table_lsf[j][k ][i] = FIXR(1.0)((int)((1.0) * (1 << 23) + 0.5)); |
| 274 | ff_dlog(NULL, "is_table_lsf %d %d: %f %f\n",av_log(((void*)0), 48, "is_table_lsf %d %d: %f %f\n", i, j, ( float) is_table_lsf[j][0][i], (float) is_table_lsf[j][1][i]) |
| 275 | i, j, (float) is_table_lsf[j][0][i],av_log(((void*)0), 48, "is_table_lsf %d %d: %f %f\n", i, j, ( float) is_table_lsf[j][0][i], (float) is_table_lsf[j][1][i]) |
| 276 | (float) is_table_lsf[j][1][i])av_log(((void*)0), 48, "is_table_lsf %d %d: %f %f\n", i, j, ( float) is_table_lsf[j][0][i], (float) is_table_lsf[j][1][i]); |
| 277 | } |
| 278 | } |
| 279 | RENAME(ff_mpa_synth_init)ff_mpa_synth_init_fixed(); |
| 280 | ff_mpegaudiodec_common_init_static(); |
| 281 | } |
| 282 | |
| 283 | static av_cold__attribute__((cold)) int decode_ctx_init(AVCodecContext *avctx, MPADecodeContext *s) |
| 284 | { |
| 285 | static AVOncepthread_once_t init_static_once = AV_ONCE_INIT0; |
| 286 | |
| 287 | s->avctx = avctx; |
| 288 | |
| 289 | #if USE_FLOATS0 |
| 290 | { |
| 291 | AVFloatDSPContext *fdsp; |
| 292 | fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT(1 << 23)); |
| 293 | if (!fdsp) |
| 294 | return AVERROR(ENOMEM)(-(12)); |
| 295 | s->butterflies_float = fdsp->butterflies_float; |
| 296 | av_free(fdsp); |
| 297 | } |
| 298 | #endif |
| 299 | |
| 300 | ff_mpadsp_init(&s->mpadsp); |
| 301 | |
| 302 | if (avctx->request_sample_fmt == OUT_FMTAV_SAMPLE_FMT_S16 && |
| 303 | avctx->codec_id != AV_CODEC_ID_MP3ON4) |
| 304 | avctx->sample_fmt = OUT_FMTAV_SAMPLE_FMT_S16; |
| 305 | else |
| 306 | avctx->sample_fmt = OUT_FMT_PAV_SAMPLE_FMT_S16P; |
| 307 | s->err_recognition = avctx->err_recognition; |
| 308 | |
| 309 | if (avctx->codec_id == AV_CODEC_ID_MP3ADU) |
| 310 | s->adu_mode = 1; |
| 311 | |
| 312 | ff_thread_once(&init_static_once, decode_init_static)strict_pthread_once(&init_static_once, decode_init_static ); |
| 313 | |
| 314 | return 0; |
| 315 | } |
| 316 | |
| 317 | static av_cold__attribute__((cold)) int decode_init(AVCodecContext *avctx) |
| 318 | { |
| 319 | return decode_ctx_init(avctx, avctx->priv_data); |
| 320 | } |
| 321 | |
| 322 | #define C3((int)((0.86602540378443864676/2) * (1LL<<32) + 0.5)) FIXHR(0.86602540378443864676/2)((int)((0.86602540378443864676/2) * (1LL<<32) + 0.5)) |
| 323 | #define C4((int)((0.70710678118654752439/2) * (1LL<<32) + 0.5)) FIXHR(0.70710678118654752439/2)((int)((0.70710678118654752439/2) * (1LL<<32) + 0.5)) //0.5 / cos(pi*(9)/36) |
| 324 | #define C5((int)((0.51763809020504152469/2) * (1LL<<32) + 0.5)) FIXHR(0.51763809020504152469/2)((int)((0.51763809020504152469/2) * (1LL<<32) + 0.5)) //0.5 / cos(pi*(5)/36) |
| 325 | #define C6((int)((1.93185165257813657349/4) * (1LL<<32) + 0.5)) FIXHR(1.93185165257813657349/4)((int)((1.93185165257813657349/4) * (1LL<<32) + 0.5)) //0.5 / cos(pi*(15)/36) |
| 326 | |
| 327 | /* 12 points IMDCT. We compute it "by hand" by factorizing obvious |
| 328 | cases. */ |
| 329 | static void imdct12(INTFLOATint *out, SUINTFLOATunsigned *in) |
| 330 | { |
| 331 | SUINTFLOATunsigned in0, in1, in2, in3, in4, in5, t1, t2; |
| 332 | |
| 333 | in0 = in[0*3]; |
| 334 | in1 = in[1*3] + in[0*3]; |
| 335 | in2 = in[2*3] + in[1*3]; |
| 336 | in3 = in[3*3] + in[2*3]; |
| 337 | in4 = in[4*3] + in[3*3]; |
| 338 | in5 = in[5*3] + in[4*3]; |
| 339 | in5 += in3; |
| 340 | in3 += in1; |
| 341 | |
| 342 | in2 = MULH3(in2, C3, 2)MULH((2)*(in2), ((int)((0.86602540378443864676/2) * (1LL<< 32) + 0.5))); |
| 343 | in3 = MULH3(in3, C3, 4)MULH((4)*(in3), ((int)((0.86602540378443864676/2) * (1LL<< 32) + 0.5))); |
| 344 | |
| 345 | t1 = in0 - in4; |
| 346 | t2 = MULH3(in1 - in5, C4, 2)MULH((2)*(in1 - in5), ((int)((0.70710678118654752439/2) * (1LL <<32) + 0.5))); |
| 347 | |
| 348 | out[ 7] = |
| 349 | out[10] = t1 + t2; |
| 350 | out[ 1] = |
| 351 | out[ 4] = t1 - t2; |
| 352 | |
| 353 | in0 += SHR(in4, 1)(((int)(in4))>>(1)); |
| 354 | in4 = in0 + in2; |
| 355 | in5 += 2*in1; |
| 356 | in1 = MULH3(in5 + in3, C5, 1)MULH((1)*(in5 + in3), ((int)((0.51763809020504152469/2) * (1LL <<32) + 0.5))); |
| 357 | out[ 8] = |
| 358 | out[ 9] = in4 + in1; |
| 359 | out[ 2] = |
| 360 | out[ 3] = in4 - in1; |
| 361 | |
| 362 | in0 -= in2; |
| 363 | in5 = MULH3(in5 - in3, C6, 2)MULH((2)*(in5 - in3), ((int)((1.93185165257813657349/4) * (1LL <<32) + 0.5))); |
| 364 | out[ 0] = |
| 365 | out[ 5] = in0 - in5; |
| 366 | out[ 6] = |
| 367 | out[11] = in0 + in5; |
| 368 | } |
| 369 | |
| 370 | static int handle_crc(MPADecodeContext *s, int sec_len) |
| 371 | { |
| 372 | if (s->error_protection && (s->err_recognition & AV_EF_CRCCHECK(1<<0))) { |
| 373 | const uint8_t *buf = s->gb.buffer - HEADER_SIZE4; |
| 374 | int sec_byte_len = sec_len >> 3; |
| 375 | int sec_rem_bits = sec_len & 7; |
| 376 | const AVCRC *crc_tab = av_crc_get_table(AV_CRC_16_ANSI); |
| 377 | uint8_t tmp_buf[4]; |
| 378 | uint32_t crc_val = av_crc(crc_tab, UINT16_MAX(65535), &buf[2], 2); |
| 379 | crc_val = av_crc(crc_tab, crc_val, &buf[6], sec_byte_len); |
| 380 | |
| 381 | AV_WB32(tmp_buf,((((union unaligned_32 *) (tmp_buf))->l) = (av_bswap32(((buf [6 + sec_byte_len] & (0xFF00U >> sec_rem_bits)) << 24) + ((s->crc << 16) >> sec_rem_bits)))) |
| 382 | ((buf[6 + sec_byte_len] & (0xFF00U >> sec_rem_bits)) << 24) +((((union unaligned_32 *) (tmp_buf))->l) = (av_bswap32(((buf [6 + sec_byte_len] & (0xFF00U >> sec_rem_bits)) << 24) + ((s->crc << 16) >> sec_rem_bits)))) |
| 383 | ((s->crc << 16) >> sec_rem_bits))((((union unaligned_32 *) (tmp_buf))->l) = (av_bswap32(((buf [6 + sec_byte_len] & (0xFF00U >> sec_rem_bits)) << 24) + ((s->crc << 16) >> sec_rem_bits)))); |
| 384 | |
| 385 | crc_val = av_crc(crc_tab, crc_val, tmp_buf, 3); |
| 386 | |
| 387 | if (crc_val) { |
| 388 | av_log(s->avctx, AV_LOG_ERROR16, "CRC mismatch %"PRIX32"X""!\n", crc_val); |
| 389 | if (s->err_recognition & AV_EF_EXPLODE(1<<3)) |
| 390 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 391 | } |
| 392 | } |
| 393 | return 0; |
| 394 | } |
| 395 | |
| 396 | /* return the number of decoded frames */ |
| 397 | static int mp_decode_layer1(MPADecodeContext *s) |
| 398 | { |
| 399 | int bound, i, v, n, ch, j, mant; |
| 400 | uint8_t allocation[MPA_MAX_CHANNELS2][SBLIMIT32]; |
| 401 | uint8_t scale_factors[MPA_MAX_CHANNELS2][SBLIMIT32]; |
| 402 | int ret; |
| 403 | |
| 404 | ret = handle_crc(s, (s->nb_channels == 1) ? 8*16 : 8*32); |
| 405 | if (ret < 0) |
| 406 | return ret; |
| 407 | |
| 408 | if (s->mode == MPA_JSTEREO1) |
| 409 | bound = (s->mode_ext + 1) * 4; |
| 410 | else |
| 411 | bound = SBLIMIT32; |
| 412 | |
| 413 | /* allocation bits */ |
| 414 | for (i = 0; i < bound; i++) { |
| 415 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 416 | allocation[ch][i] = get_bits(&s->gb, 4); |
| 417 | } |
| 418 | } |
| 419 | for (i = bound; i < SBLIMIT32; i++) |
| 420 | allocation[0][i] = get_bits(&s->gb, 4); |
| 421 | |
| 422 | /* scale factors */ |
| 423 | for (i = 0; i < bound; i++) { |
| 424 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 425 | if (allocation[ch][i]) |
| 426 | scale_factors[ch][i] = get_bits(&s->gb, 6); |
| 427 | } |
| 428 | } |
| 429 | for (i = bound; i < SBLIMIT32; i++) { |
| 430 | if (allocation[0][i]) { |
| 431 | scale_factors[0][i] = get_bits(&s->gb, 6); |
| 432 | scale_factors[1][i] = get_bits(&s->gb, 6); |
| 433 | } |
| 434 | } |
| 435 | |
| 436 | /* compute samples */ |
| 437 | for (j = 0; j < 12; j++) { |
| 438 | for (i = 0; i < bound; i++) { |
| 439 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 440 | n = allocation[ch][i]; |
| 441 | if (n) { |
| 442 | mant = get_bits(&s->gb, n + 1); |
| 443 | v = l1_unscale(n, mant, scale_factors[ch][i]); |
| 444 | } else { |
| 445 | v = 0; |
| 446 | } |
| 447 | s->sb_samples[ch][j][i] = v; |
| 448 | } |
| 449 | } |
| 450 | for (i = bound; i < SBLIMIT32; i++) { |
| 451 | n = allocation[0][i]; |
| 452 | if (n) { |
| 453 | mant = get_bits(&s->gb, n + 1); |
| 454 | v = l1_unscale(n, mant, scale_factors[0][i]); |
| 455 | s->sb_samples[0][j][i] = v; |
| 456 | v = l1_unscale(n, mant, scale_factors[1][i]); |
| 457 | s->sb_samples[1][j][i] = v; |
| 458 | } else { |
| 459 | s->sb_samples[0][j][i] = 0; |
| 460 | s->sb_samples[1][j][i] = 0; |
| 461 | } |
| 462 | } |
| 463 | } |
| 464 | return 12; |
| 465 | } |
| 466 | |
| 467 | static int mp_decode_layer2(MPADecodeContext *s) |
| 468 | { |
| 469 | int sblimit; /* number of used subbands */ |
| 470 | const unsigned char *alloc_table; |
| 471 | int table, bit_alloc_bits, i, j, ch, bound, v; |
| 472 | unsigned char bit_alloc[MPA_MAX_CHANNELS2][SBLIMIT32]; |
| 473 | unsigned char scale_code[MPA_MAX_CHANNELS2][SBLIMIT32]; |
| 474 | unsigned char scale_factors[MPA_MAX_CHANNELS2][SBLIMIT32][3], *sf; |
| 475 | int scale, qindex, bits, steps, k, l, m, b; |
| 476 | int ret; |
| 477 | |
| 478 | /* select decoding table */ |
| 479 | table = ff_mpa_l2_select_table(s->bit_rate / 1000, s->nb_channels, |
| 480 | s->sample_rate, s->lsf); |
| 481 | sblimit = ff_mpa_sblimit_table[table]; |
| 482 | alloc_table = ff_mpa_alloc_tables[table]; |
| 483 | |
| 484 | if (s->mode == MPA_JSTEREO1) |
| 485 | bound = (s->mode_ext + 1) * 4; |
| 486 | else |
| 487 | bound = sblimit; |
| 488 | |
| 489 | ff_dlog(s->avctx, "bound=%d sblimit=%d\n", bound, sblimit)av_log(s->avctx, 48, "bound=%d sblimit=%d\n", bound, sblimit ); |
| 490 | |
| 491 | /* sanity check */ |
| 492 | if (bound > sblimit) |
| 493 | bound = sblimit; |
| 494 | |
| 495 | /* parse bit allocation */ |
| 496 | j = 0; |
| 497 | for (i = 0; i < bound; i++) { |
| 498 | bit_alloc_bits = alloc_table[j]; |
| 499 | for (ch = 0; ch < s->nb_channels; ch++) |
| 500 | bit_alloc[ch][i] = get_bits(&s->gb, bit_alloc_bits); |
| 501 | j += 1 << bit_alloc_bits; |
| 502 | } |
| 503 | for (i = bound; i < sblimit; i++) { |
| 504 | bit_alloc_bits = alloc_table[j]; |
| 505 | v = get_bits(&s->gb, bit_alloc_bits); |
| 506 | bit_alloc[0][i] = v; |
| 507 | bit_alloc[1][i] = v; |
| 508 | j += 1 << bit_alloc_bits; |
| 509 | } |
| 510 | |
| 511 | /* scale codes */ |
| 512 | for (i = 0; i < sblimit; i++) { |
| 513 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 514 | if (bit_alloc[ch][i]) |
| 515 | scale_code[ch][i] = get_bits(&s->gb, 2); |
| 516 | } |
| 517 | } |
| 518 | |
| 519 | ret = handle_crc(s, get_bits_count(&s->gb) - 16); |
| 520 | if (ret < 0) |
| 521 | return ret; |
| 522 | |
| 523 | /* scale factors */ |
| 524 | for (i = 0; i < sblimit; i++) { |
| 525 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 526 | if (bit_alloc[ch][i]) { |
| 527 | sf = scale_factors[ch][i]; |
| 528 | switch (scale_code[ch][i]) { |
| 529 | default: |
| 530 | case 0: |
| 531 | sf[0] = get_bits(&s->gb, 6); |
| 532 | sf[1] = get_bits(&s->gb, 6); |
| 533 | sf[2] = get_bits(&s->gb, 6); |
| 534 | break; |
| 535 | case 2: |
| 536 | sf[0] = get_bits(&s->gb, 6); |
| 537 | sf[1] = sf[0]; |
| 538 | sf[2] = sf[0]; |
| 539 | break; |
| 540 | case 1: |
| 541 | sf[0] = get_bits(&s->gb, 6); |
| 542 | sf[2] = get_bits(&s->gb, 6); |
| 543 | sf[1] = sf[0]; |
| 544 | break; |
| 545 | case 3: |
| 546 | sf[0] = get_bits(&s->gb, 6); |
| 547 | sf[2] = get_bits(&s->gb, 6); |
| 548 | sf[1] = sf[2]; |
| 549 | break; |
| 550 | } |
| 551 | } |
| 552 | } |
| 553 | } |
| 554 | |
| 555 | /* samples */ |
| 556 | for (k = 0; k < 3; k++) { |
| 557 | for (l = 0; l < 12; l += 3) { |
| 558 | j = 0; |
| 559 | for (i = 0; i < bound; i++) { |
| 560 | bit_alloc_bits = alloc_table[j]; |
| 561 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 562 | b = bit_alloc[ch][i]; |
| 563 | if (b) { |
| 564 | scale = scale_factors[ch][i][k]; |
| 565 | qindex = alloc_table[j+b]; |
| 566 | bits = ff_mpa_quant_bits[qindex]; |
| 567 | if (bits < 0) { |
| 568 | int v2; |
| 569 | /* 3 values at the same time */ |
| 570 | v = get_bits(&s->gb, -bits); |
| 571 | v2 = ff_division_tabs[qindex][v]; |
| 572 | steps = ff_mpa_quant_steps[qindex]; |
| 573 | |
| 574 | s->sb_samples[ch][k * 12 + l + 0][i] = |
| 575 | l2_unscale_group(steps, v2 & 15, scale); |
| 576 | s->sb_samples[ch][k * 12 + l + 1][i] = |
| 577 | l2_unscale_group(steps, (v2 >> 4) & 15, scale); |
| 578 | s->sb_samples[ch][k * 12 + l + 2][i] = |
| 579 | l2_unscale_group(steps, v2 >> 8 , scale); |
| 580 | } else { |
| 581 | for (m = 0; m < 3; m++) { |
| 582 | v = get_bits(&s->gb, bits); |
| 583 | v = l1_unscale(bits - 1, v, scale); |
| 584 | s->sb_samples[ch][k * 12 + l + m][i] = v; |
| 585 | } |
| 586 | } |
| 587 | } else { |
| 588 | s->sb_samples[ch][k * 12 + l + 0][i] = 0; |
| 589 | s->sb_samples[ch][k * 12 + l + 1][i] = 0; |
| 590 | s->sb_samples[ch][k * 12 + l + 2][i] = 0; |
| 591 | } |
| 592 | } |
| 593 | /* next subband in alloc table */ |
| 594 | j += 1 << bit_alloc_bits; |
| 595 | } |
| 596 | /* XXX: find a way to avoid this duplication of code */ |
| 597 | for (i = bound; i < sblimit; i++) { |
| 598 | bit_alloc_bits = alloc_table[j]; |
| 599 | b = bit_alloc[0][i]; |
| 600 | if (b) { |
| 601 | int mant, scale0, scale1; |
| 602 | scale0 = scale_factors[0][i][k]; |
| 603 | scale1 = scale_factors[1][i][k]; |
| 604 | qindex = alloc_table[j + b]; |
| 605 | bits = ff_mpa_quant_bits[qindex]; |
| 606 | if (bits < 0) { |
| 607 | /* 3 values at the same time */ |
| 608 | v = get_bits(&s->gb, -bits); |
| 609 | steps = ff_mpa_quant_steps[qindex]; |
| 610 | mant = v % steps; |
| 611 | v = v / steps; |
| 612 | s->sb_samples[0][k * 12 + l + 0][i] = |
| 613 | l2_unscale_group(steps, mant, scale0); |
| 614 | s->sb_samples[1][k * 12 + l + 0][i] = |
| 615 | l2_unscale_group(steps, mant, scale1); |
| 616 | mant = v % steps; |
| 617 | v = v / steps; |
| 618 | s->sb_samples[0][k * 12 + l + 1][i] = |
| 619 | l2_unscale_group(steps, mant, scale0); |
| 620 | s->sb_samples[1][k * 12 + l + 1][i] = |
| 621 | l2_unscale_group(steps, mant, scale1); |
| 622 | s->sb_samples[0][k * 12 + l + 2][i] = |
| 623 | l2_unscale_group(steps, v, scale0); |
| 624 | s->sb_samples[1][k * 12 + l + 2][i] = |
| 625 | l2_unscale_group(steps, v, scale1); |
| 626 | } else { |
| 627 | for (m = 0; m < 3; m++) { |
| 628 | mant = get_bits(&s->gb, bits); |
| 629 | s->sb_samples[0][k * 12 + l + m][i] = |
| 630 | l1_unscale(bits - 1, mant, scale0); |
| 631 | s->sb_samples[1][k * 12 + l + m][i] = |
| 632 | l1_unscale(bits - 1, mant, scale1); |
| 633 | } |
| 634 | } |
| 635 | } else { |
| 636 | s->sb_samples[0][k * 12 + l + 0][i] = 0; |
| 637 | s->sb_samples[0][k * 12 + l + 1][i] = 0; |
| 638 | s->sb_samples[0][k * 12 + l + 2][i] = 0; |
| 639 | s->sb_samples[1][k * 12 + l + 0][i] = 0; |
| 640 | s->sb_samples[1][k * 12 + l + 1][i] = 0; |
| 641 | s->sb_samples[1][k * 12 + l + 2][i] = 0; |
| 642 | } |
| 643 | /* next subband in alloc table */ |
| 644 | j += 1 << bit_alloc_bits; |
| 645 | } |
| 646 | /* fill remaining samples to zero */ |
| 647 | for (i = sblimit; i < SBLIMIT32; i++) { |
| 648 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 649 | s->sb_samples[ch][k * 12 + l + 0][i] = 0; |
| 650 | s->sb_samples[ch][k * 12 + l + 1][i] = 0; |
| 651 | s->sb_samples[ch][k * 12 + l + 2][i] = 0; |
| 652 | } |
| 653 | } |
| 654 | } |
| 655 | } |
| 656 | return 3 * 12; |
| 657 | } |
| 658 | |
| 659 | #define SPLIT(dst,sf,n)if (n == 3) { int m = (sf * 171) >> 9; dst = sf - 3 * m ; sf = m; } else if (n == 4) { dst = sf & 3; sf >>= 2; } else if (n == 5) { int m = (sf * 205) >> 10; dst = sf - 5 * m; sf = m; } else if (n == 6) { int m = (sf * 171) >> 10; dst = sf - 6 * m; sf = m; } else { dst = 0; } \ |
| 660 | if (n == 3) { \ |
| 661 | int m = (sf * 171) >> 9; \ |
| 662 | dst = sf - 3 * m; \ |
| 663 | sf = m; \ |
| 664 | } else if (n == 4) { \ |
| 665 | dst = sf & 3; \ |
| 666 | sf >>= 2; \ |
| 667 | } else if (n == 5) { \ |
| 668 | int m = (sf * 205) >> 10; \ |
| 669 | dst = sf - 5 * m; \ |
| 670 | sf = m; \ |
| 671 | } else if (n == 6) { \ |
| 672 | int m = (sf * 171) >> 10; \ |
| 673 | dst = sf - 6 * m; \ |
| 674 | sf = m; \ |
| 675 | } else { \ |
| 676 | dst = 0; \ |
| 677 | } |
| 678 | |
| 679 | static av_always_inline__attribute__((always_inline)) inline void lsf_sf_expand(int *slen, int sf, int n1, int n2, |
| 680 | int n3) |
| 681 | { |
| 682 | SPLIT(slen[3], sf, n3)if (n3 == 3) { int m = (sf * 171) >> 9; slen[3] = sf - 3 * m; sf = m; } else if (n3 == 4) { slen[3] = sf & 3; sf >>= 2; } else if (n3 == 5) { int m = (sf * 205) >> 10; slen [3] = sf - 5 * m; sf = m; } else if (n3 == 6) { int m = (sf * 171) >> 10; slen[3] = sf - 6 * m; sf = m; } else { slen [3] = 0; } |
| 683 | SPLIT(slen[2], sf, n2)if (n2 == 3) { int m = (sf * 171) >> 9; slen[2] = sf - 3 * m; sf = m; } else if (n2 == 4) { slen[2] = sf & 3; sf >>= 2; } else if (n2 == 5) { int m = (sf * 205) >> 10; slen [2] = sf - 5 * m; sf = m; } else if (n2 == 6) { int m = (sf * 171) >> 10; slen[2] = sf - 6 * m; sf = m; } else { slen [2] = 0; } |
| 684 | SPLIT(slen[1], sf, n1)if (n1 == 3) { int m = (sf * 171) >> 9; slen[1] = sf - 3 * m; sf = m; } else if (n1 == 4) { slen[1] = sf & 3; sf >>= 2; } else if (n1 == 5) { int m = (sf * 205) >> 10; slen [1] = sf - 5 * m; sf = m; } else if (n1 == 6) { int m = (sf * 171) >> 10; slen[1] = sf - 6 * m; sf = m; } else { slen [1] = 0; } |
| 685 | slen[0] = sf; |
| 686 | } |
| 687 | |
| 688 | static void exponents_from_scale_factors(MPADecodeContext *s, GranuleDef *g, |
| 689 | int16_t *exponents) |
| 690 | { |
| 691 | const uint8_t *bstab, *pretab; |
| 692 | int len, i, j, k, l, v0, shift, gain, gains[3]; |
| 693 | int16_t *exp_ptr; |
| 694 | |
| 695 | exp_ptr = exponents; |
| 696 | gain = g->global_gain - 210; |
| 697 | shift = g->scalefac_scale + 1; |
| 698 | |
| 699 | bstab = ff_band_size_long[s->sample_rate_index]; |
| 700 | pretab = ff_mpa_pretab[g->preflag]; |
| 701 | for (i = 0; i < g->long_end; i++) { |
| 702 | v0 = gain - ((g->scale_factors[i] + pretab[i]) << shift) + 400; |
| 703 | len = bstab[i]; |
| 704 | for (j = len; j > 0; j--) |
| 705 | *exp_ptr++ = v0; |
| 706 | } |
| 707 | |
| 708 | if (g->short_start < 13) { |
| 709 | bstab = ff_band_size_short[s->sample_rate_index]; |
| 710 | gains[0] = gain - (g->subblock_gain[0] << 3); |
| 711 | gains[1] = gain - (g->subblock_gain[1] << 3); |
| 712 | gains[2] = gain - (g->subblock_gain[2] << 3); |
| 713 | k = g->long_end; |
| 714 | for (i = g->short_start; i < 13; i++) { |
| 715 | len = bstab[i]; |
| 716 | for (l = 0; l < 3; l++) { |
| 717 | v0 = gains[l] - (g->scale_factors[k++] << shift) + 400; |
| 718 | for (j = len; j > 0; j--) |
| 719 | *exp_ptr++ = v0; |
| 720 | } |
| 721 | } |
| 722 | } |
| 723 | } |
| 724 | |
| 725 | static void switch_buffer(MPADecodeContext *s, int *pos, int *end_pos, |
| 726 | int *end_pos2) |
| 727 | { |
| 728 | if (s->in_gb.buffer && *pos >= s->gb.size_in_bits - s->extrasize * 8) { |
| 729 | s->gb = s->in_gb; |
| 730 | s->in_gb.buffer = NULL((void*)0); |
| 731 | s->extrasize = 0; |
| 732 | av_assert2((get_bits_count(&s->gb) & 7) == 0)do { if (!((get_bits_count(&s->gb) & 7) == 0)) { av_log (((void*)0), 0, "Assertion %s failed at %s:%d\n", "(get_bits_count(&s->gb) & 7) == 0" , "/root/firefox-clang/media/ffvpx/libavcodec/mpegaudiodec_template.c" , 732); abort(); } } while (0); |
| 733 | skip_bits_long(&s->gb, *pos - *end_pos); |
| 734 | *end_pos2 = |
| 735 | *end_pos = *end_pos2 + get_bits_count(&s->gb) - *pos; |
| 736 | *pos = get_bits_count(&s->gb); |
| 737 | } |
| 738 | } |
| 739 | |
| 740 | /* Following is an optimized code for |
| 741 | INTFLOAT v = *src |
| 742 | if(get_bits1(&s->gb)) |
| 743 | v = -v; |
| 744 | *dst = v; |
| 745 | */ |
| 746 | #if USE_FLOATS0 |
| 747 | #define READ_FLIP_SIGN(dst,src)v = -get_bits1(&s->gb); *(dst) = (*(src) ^ v) - v; \ |
| 748 | v = AV_RN32A(src)(((const av_alias32*)(src))->u32) ^ (get_bits1(&s->gb) << 31); \ |
| 749 | AV_WN32A(dst, v)(((av_alias32*)(dst))->u32 = (v)); |
| 750 | #else |
| 751 | #define READ_FLIP_SIGN(dst,src)v = -get_bits1(&s->gb); *(dst) = (*(src) ^ v) - v; \ |
| 752 | v = -get_bits1(&s->gb); \ |
| 753 | *(dst) = (*(src) ^ v) - v; |
| 754 | #endif |
| 755 | |
| 756 | static int huffman_decode(MPADecodeContext *s, GranuleDef *g, |
| 757 | int16_t *exponents, int end_pos2) |
| 758 | { |
| 759 | int s_index; |
| 760 | int i; |
| 761 | int last_pos, bits_left; |
| 762 | VLC *vlc; |
| 763 | int end_pos = FFMIN(end_pos2, s->gb.size_in_bits - s->extrasize * 8)((end_pos2) > (s->gb.size_in_bits - s->extrasize * 8 ) ? (s->gb.size_in_bits - s->extrasize * 8) : (end_pos2 )); |
| 764 | |
| 765 | /* low frequencies (called big values) */ |
| 766 | s_index = 0; |
| 767 | for (i = 0; i < 3; i++) { |
| 768 | const VLCElem *vlctab; |
| 769 | int j, k, l, linbits; |
| 770 | j = g->region_size[i]; |
| 771 | if (j == 0) |
| 772 | continue; |
| 773 | /* select vlc table */ |
| 774 | k = g->table_select[i]; |
| 775 | l = ff_mpa_huff_data[k][0]; |
| 776 | linbits = ff_mpa_huff_data[k][1]; |
| 777 | |
| 778 | if (!l) { |
| 779 | memset(&g->sb_hybrid[s_index], 0, sizeof(*g->sb_hybrid) * 2 * j); |
| 780 | s_index += 2 * j; |
| 781 | continue; |
| 782 | } |
| 783 | vlctab = ff_huff_vlc[l]; |
| 784 | |
| 785 | /* read huffcode and compute each couple */ |
| 786 | for (; j > 0; j--) { |
| 787 | int exponent, x, y; |
| 788 | int v; |
| 789 | int pos = get_bits_count(&s->gb); |
| 790 | |
| 791 | if (pos >= end_pos){ |
| 792 | switch_buffer(s, &pos, &end_pos, &end_pos2); |
| 793 | if (pos >= end_pos) |
| 794 | break; |
| 795 | } |
| 796 | y = get_vlc2(&s->gb, vlctab, 7, 3); |
| 797 | |
| 798 | if (!y) { |
| 799 | g->sb_hybrid[s_index ] = |
| 800 | g->sb_hybrid[s_index + 1] = 0; |
| 801 | s_index += 2; |
| 802 | continue; |
| 803 | } |
| 804 | |
| 805 | exponent= exponents[s_index]; |
| 806 | |
| 807 | ff_dlog(s->avctx, "region=%d n=%d y=%d exp=%d\n",av_log(s->avctx, 48, "region=%d n=%d y=%d exp=%d\n", i, g-> region_size[i] - j, y, exponent) |
| 808 | i, g->region_size[i] - j, y, exponent)av_log(s->avctx, 48, "region=%d n=%d y=%d exp=%d\n", i, g-> region_size[i] - j, y, exponent); |
| 809 | if (y & 16) { |
| 810 | x = y >> 5; |
| 811 | y = y & 0x0f; |
| 812 | if (x < 15) { |
| 813 | READ_FLIP_SIGN(g->sb_hybrid + s_index, RENAME(expval_table)[exponent] + x)v = -get_bits1(&s->gb); *(g->sb_hybrid + s_index) = (*(expval_table_fixed[exponent] + x) ^ v) - v; |
| 814 | } else { |
| 815 | x += get_bitsz(&s->gb, linbits); |
| 816 | v = l3_unscale(x, exponent); |
| 817 | if (get_bits1(&s->gb)) |
| 818 | v = -v; |
| 819 | g->sb_hybrid[s_index] = v; |
| 820 | } |
| 821 | if (y < 15) { |
| 822 | READ_FLIP_SIGN(g->sb_hybrid + s_index + 1, RENAME(expval_table)[exponent] + y)v = -get_bits1(&s->gb); *(g->sb_hybrid + s_index + 1 ) = (*(expval_table_fixed[exponent] + y) ^ v) - v; |
| 823 | } else { |
| 824 | y += get_bitsz(&s->gb, linbits); |
| 825 | v = l3_unscale(y, exponent); |
| 826 | if (get_bits1(&s->gb)) |
| 827 | v = -v; |
| 828 | g->sb_hybrid[s_index + 1] = v; |
| 829 | } |
| 830 | } else { |
| 831 | x = y >> 5; |
| 832 | y = y & 0x0f; |
| 833 | x += y; |
| 834 | if (x < 15) { |
| 835 | READ_FLIP_SIGN(g->sb_hybrid + s_index + !!y, RENAME(expval_table)[exponent] + x)v = -get_bits1(&s->gb); *(g->sb_hybrid + s_index + ! !y) = (*(expval_table_fixed[exponent] + x) ^ v) - v; |
| 836 | } else { |
| 837 | x += get_bitsz(&s->gb, linbits); |
| 838 | v = l3_unscale(x, exponent); |
| 839 | if (get_bits1(&s->gb)) |
| 840 | v = -v; |
| 841 | g->sb_hybrid[s_index+!!y] = v; |
| 842 | } |
| 843 | g->sb_hybrid[s_index + !y] = 0; |
| 844 | } |
| 845 | s_index += 2; |
| 846 | } |
| 847 | } |
| 848 | |
| 849 | /* high frequencies */ |
| 850 | vlc = &ff_huff_quad_vlc[g->count1table_select]; |
| 851 | last_pos = 0; |
| 852 | while (s_index <= 572) { |
| 853 | int pos, code; |
| 854 | pos = get_bits_count(&s->gb); |
| 855 | if (pos >= end_pos) { |
| 856 | if (pos > end_pos2 && last_pos) { |
| 857 | /* some encoders generate an incorrect size for this |
| 858 | part. We must go back into the data */ |
| 859 | s_index -= 4; |
| 860 | skip_bits_long(&s->gb, last_pos - pos); |
| 861 | av_log(s->avctx, AV_LOG_INFO32, "overread, skip %d enddists: %d %d\n", last_pos - pos, end_pos-pos, end_pos2-pos); |
| 862 | if(s->err_recognition & (AV_EF_BITSTREAM(1<<1)|AV_EF_COMPLIANT(1<<17))) |
| 863 | s_index=0; |
| 864 | break; |
| 865 | } |
| 866 | switch_buffer(s, &pos, &end_pos, &end_pos2); |
| 867 | if (pos >= end_pos) |
| 868 | break; |
| 869 | } |
| 870 | last_pos = pos; |
| 871 | |
| 872 | code = get_vlc2(&s->gb, vlc->table, vlc->bits, 1); |
| 873 | ff_dlog(s->avctx, "t=%d code=%d\n", g->count1table_select, code)av_log(s->avctx, 48, "t=%d code=%d\n", g->count1table_select , code); |
| 874 | g->sb_hybrid[s_index + 0] = |
| 875 | g->sb_hybrid[s_index + 1] = |
| 876 | g->sb_hybrid[s_index + 2] = |
| 877 | g->sb_hybrid[s_index + 3] = 0; |
| 878 | while (code) { |
| 879 | static const int idxtab[16] = { 3,3,2,2,1,1,1,1,0,0,0,0,0,0,0,0 }; |
| 880 | int v; |
| 881 | int pos = s_index + idxtab[code]; |
| 882 | code ^= 8 >> idxtab[code]; |
| 883 | READ_FLIP_SIGN(g->sb_hybrid + pos, RENAME(exp_table)+exponents[pos])v = -get_bits1(&s->gb); *(g->sb_hybrid + pos) = (*( exp_table_fixed+exponents[pos]) ^ v) - v; |
| 884 | } |
| 885 | s_index += 4; |
| 886 | } |
| 887 | /* skip extension bits */ |
| 888 | bits_left = end_pos2 - get_bits_count(&s->gb); |
| 889 | if (bits_left < 0 && (s->err_recognition & (AV_EF_BUFFER(1<<2)|AV_EF_COMPLIANT(1<<17)))) { |
| 890 | av_log(s->avctx, AV_LOG_ERROR16, "bits_left=%d\n", bits_left); |
| 891 | s_index=0; |
| 892 | } else if (bits_left > 0 && (s->err_recognition & (AV_EF_BUFFER(1<<2)|AV_EF_AGGRESSIVE(1<<18)))) { |
| 893 | av_log(s->avctx, AV_LOG_ERROR16, "bits_left=%d\n", bits_left); |
| 894 | s_index = 0; |
| 895 | } |
| 896 | memset(&g->sb_hybrid[s_index], 0, sizeof(*g->sb_hybrid) * (576 - s_index)); |
| 897 | skip_bits_long(&s->gb, bits_left); |
| 898 | |
| 899 | i = get_bits_count(&s->gb); |
| 900 | switch_buffer(s, &i, &end_pos, &end_pos2); |
| 901 | |
| 902 | return 0; |
| 903 | } |
| 904 | |
| 905 | /* Reorder short blocks from bitstream order to interleaved order. It |
| 906 | would be faster to do it in parsing, but the code would be far more |
| 907 | complicated */ |
| 908 | static void reorder_block(MPADecodeContext *s, GranuleDef *g) |
| 909 | { |
| 910 | int i, j, len; |
| 911 | INTFLOATint *ptr, *dst, *ptr1; |
| 912 | INTFLOATint tmp[576]; |
| 913 | |
| 914 | if (g->block_type != 2) |
| 915 | return; |
| 916 | |
| 917 | if (g->switch_point) { |
| 918 | if (s->sample_rate_index != 8) |
| 919 | ptr = g->sb_hybrid + 36; |
| 920 | else |
| 921 | ptr = g->sb_hybrid + 72; |
| 922 | } else { |
| 923 | ptr = g->sb_hybrid; |
| 924 | } |
| 925 | |
| 926 | for (i = g->short_start; i < 13; i++) { |
| 927 | len = ff_band_size_short[s->sample_rate_index][i]; |
| 928 | ptr1 = ptr; |
| 929 | dst = tmp; |
| 930 | for (j = len; j > 0; j--) { |
| 931 | *dst++ = ptr[0*len]; |
| 932 | *dst++ = ptr[1*len]; |
| 933 | *dst++ = ptr[2*len]; |
| 934 | ptr++; |
| 935 | } |
| 936 | ptr += 2 * len; |
| 937 | memcpy(ptr1, tmp, len * 3 * sizeof(*ptr1)); |
| 938 | } |
| 939 | } |
| 940 | |
| 941 | #define ISQRT2((int)((0.70710678118654752440) * (1 << 23) + 0.5)) FIXR(0.70710678118654752440)((int)((0.70710678118654752440) * (1 << 23) + 0.5)) |
| 942 | |
| 943 | static void compute_stereo(MPADecodeContext *s, GranuleDef *g0, GranuleDef *g1) |
| 944 | { |
| 945 | int i, j, k, l; |
| 946 | int sf_max, sf, len, non_zero_found; |
| 947 | INTFLOATint *tab0, *tab1, v1, v2; |
| 948 | const INTFLOATint (*is_tab)[16]; |
| 949 | SUINTFLOATunsigned tmp0, tmp1; |
| 950 | int non_zero_found_short[3]; |
| 951 | |
| 952 | /* intensity stereo */ |
| 953 | if (s->mode_ext & MODE_EXT_I_STEREO1) { |
| 954 | if (!s->lsf) { |
| 955 | is_tab = is_table; |
| 956 | sf_max = 7; |
| 957 | } else { |
| 958 | is_tab = is_table_lsf[g1->scalefac_compress & 1]; |
| 959 | sf_max = 16; |
| 960 | } |
| 961 | |
| 962 | tab0 = g0->sb_hybrid + 576; |
| 963 | tab1 = g1->sb_hybrid + 576; |
| 964 | |
| 965 | non_zero_found_short[0] = 0; |
| 966 | non_zero_found_short[1] = 0; |
| 967 | non_zero_found_short[2] = 0; |
| 968 | k = (13 - g1->short_start) * 3 + g1->long_end - 3; |
| 969 | for (i = 12; i >= g1->short_start; i--) { |
| 970 | /* for last band, use previous scale factor */ |
| 971 | if (i != 11) |
| 972 | k -= 3; |
| 973 | len = ff_band_size_short[s->sample_rate_index][i]; |
| 974 | for (l = 2; l >= 0; l--) { |
| 975 | tab0 -= len; |
| 976 | tab1 -= len; |
| 977 | if (!non_zero_found_short[l]) { |
| 978 | /* test if non zero band. if so, stop doing i-stereo */ |
| 979 | for (j = 0; j < len; j++) { |
| 980 | if (tab1[j] != 0) { |
| 981 | non_zero_found_short[l] = 1; |
| 982 | goto found1; |
| 983 | } |
| 984 | } |
| 985 | sf = g1->scale_factors[k + l]; |
| 986 | if (sf >= sf_max) |
| 987 | goto found1; |
| 988 | |
| 989 | v1 = is_tab[0][sf]; |
| 990 | v2 = is_tab[1][sf]; |
| 991 | for (j = 0; j < len; j++) { |
| 992 | tmp0 = tab0[j]; |
| 993 | tab0[j] = MULLx(tmp0, v1, FRAC_BITS)(((int64_t)((int)(tmp0)) * (int64_t)((v1))) >> (23)); |
| 994 | tab1[j] = MULLx(tmp0, v2, FRAC_BITS)(((int64_t)((int)(tmp0)) * (int64_t)((v2))) >> (23)); |
| 995 | } |
| 996 | } else { |
| 997 | found1: |
| 998 | if (s->mode_ext & MODE_EXT_MS_STEREO2) { |
| 999 | /* lower part of the spectrum : do ms stereo |
| 1000 | if enabled */ |
| 1001 | for (j = 0; j < len; j++) { |
| 1002 | tmp0 = tab0[j]; |
| 1003 | tmp1 = tab1[j]; |
| 1004 | tab0[j] = MULLx(tmp0 + tmp1, ISQRT2, FRAC_BITS)(((int64_t)((int)(tmp0 + tmp1)) * (int64_t)((((int)((0.70710678118654752440 ) * (1 << 23) + 0.5))))) >> (23)); |
| 1005 | tab1[j] = MULLx(tmp0 - tmp1, ISQRT2, FRAC_BITS)(((int64_t)((int)(tmp0 - tmp1)) * (int64_t)((((int)((0.70710678118654752440 ) * (1 << 23) + 0.5))))) >> (23)); |
| 1006 | } |
| 1007 | } |
| 1008 | } |
| 1009 | } |
| 1010 | } |
| 1011 | |
| 1012 | non_zero_found = non_zero_found_short[0] | |
| 1013 | non_zero_found_short[1] | |
| 1014 | non_zero_found_short[2]; |
| 1015 | |
| 1016 | for (i = g1->long_end - 1;i >= 0;i--) { |
| 1017 | len = ff_band_size_long[s->sample_rate_index][i]; |
| 1018 | tab0 -= len; |
| 1019 | tab1 -= len; |
| 1020 | /* test if non zero band. if so, stop doing i-stereo */ |
| 1021 | if (!non_zero_found) { |
| 1022 | for (j = 0; j < len; j++) { |
| 1023 | if (tab1[j] != 0) { |
| 1024 | non_zero_found = 1; |
| 1025 | goto found2; |
| 1026 | } |
| 1027 | } |
| 1028 | /* for last band, use previous scale factor */ |
| 1029 | k = (i == 21) ? 20 : i; |
| 1030 | sf = g1->scale_factors[k]; |
| 1031 | if (sf >= sf_max) |
| 1032 | goto found2; |
| 1033 | v1 = is_tab[0][sf]; |
| 1034 | v2 = is_tab[1][sf]; |
| 1035 | for (j = 0; j < len; j++) { |
| 1036 | tmp0 = tab0[j]; |
| 1037 | tab0[j] = MULLx(tmp0, v1, FRAC_BITS)(((int64_t)((int)(tmp0)) * (int64_t)((v1))) >> (23)); |
| 1038 | tab1[j] = MULLx(tmp0, v2, FRAC_BITS)(((int64_t)((int)(tmp0)) * (int64_t)((v2))) >> (23)); |
| 1039 | } |
| 1040 | } else { |
| 1041 | found2: |
| 1042 | if (s->mode_ext & MODE_EXT_MS_STEREO2) { |
| 1043 | /* lower part of the spectrum : do ms stereo |
| 1044 | if enabled */ |
| 1045 | for (j = 0; j < len; j++) { |
| 1046 | tmp0 = tab0[j]; |
| 1047 | tmp1 = tab1[j]; |
| 1048 | tab0[j] = MULLx(tmp0 + tmp1, ISQRT2, FRAC_BITS)(((int64_t)((int)(tmp0 + tmp1)) * (int64_t)((((int)((0.70710678118654752440 ) * (1 << 23) + 0.5))))) >> (23)); |
| 1049 | tab1[j] = MULLx(tmp0 - tmp1, ISQRT2, FRAC_BITS)(((int64_t)((int)(tmp0 - tmp1)) * (int64_t)((((int)((0.70710678118654752440 ) * (1 << 23) + 0.5))))) >> (23)); |
| 1050 | } |
| 1051 | } |
| 1052 | } |
| 1053 | } |
| 1054 | } else if (s->mode_ext & MODE_EXT_MS_STEREO2) { |
| 1055 | /* ms stereo ONLY */ |
| 1056 | /* NOTE: the 1/sqrt(2) normalization factor is included in the |
| 1057 | global gain */ |
| 1058 | #if USE_FLOATS0 |
| 1059 | s->butterflies_float(g0->sb_hybrid, g1->sb_hybrid, 576); |
| 1060 | #else |
| 1061 | tab0 = g0->sb_hybrid; |
| 1062 | tab1 = g1->sb_hybrid; |
| 1063 | for (i = 0; i < 576; i++) { |
| 1064 | tmp0 = tab0[i]; |
| 1065 | tmp1 = tab1[i]; |
| 1066 | tab0[i] = tmp0 + tmp1; |
| 1067 | tab1[i] = tmp0 - tmp1; |
| 1068 | } |
| 1069 | #endif |
| 1070 | } |
| 1071 | } |
| 1072 | |
| 1073 | #if USE_FLOATS0 |
| 1074 | #if HAVE_MIPSFPU0 |
| 1075 | # include "mips/compute_antialias_float.h" |
| 1076 | #endif /* HAVE_MIPSFPU */ |
| 1077 | #else |
| 1078 | #if HAVE_MIPSDSP0 |
| 1079 | # include "mips/compute_antialias_fixed.h" |
| 1080 | #endif /* HAVE_MIPSDSP */ |
| 1081 | #endif /* USE_FLOATS */ |
| 1082 | |
| 1083 | #ifndef compute_antialias |
| 1084 | #if USE_FLOATS0 |
| 1085 | #define AA(j)do { unsigned tmp0 = ptr[-1-j]; unsigned tmp1 = ptr[ j]; unsigned tmp2 = MULH(tmp0 + tmp1, csa_table[j][0]); ptr[-1-j] = 4 * ( tmp2 - MULH(tmp1, csa_table[j][2])); ptr[ j] = 4 * (tmp2 + MULH (tmp0, csa_table[j][3])); } while (0) do { \ |
| 1086 | float tmp0 = ptr[-1-j]; \ |
| 1087 | float tmp1 = ptr[ j]; \ |
| 1088 | ptr[-1-j] = tmp0 * csa_table[j][0] - tmp1 * csa_table[j][1]; \ |
| 1089 | ptr[ j] = tmp0 * csa_table[j][1] + tmp1 * csa_table[j][0]; \ |
| 1090 | } while (0) |
| 1091 | #else |
| 1092 | #define AA(j)do { unsigned tmp0 = ptr[-1-j]; unsigned tmp1 = ptr[ j]; unsigned tmp2 = MULH(tmp0 + tmp1, csa_table[j][0]); ptr[-1-j] = 4 * ( tmp2 - MULH(tmp1, csa_table[j][2])); ptr[ j] = 4 * (tmp2 + MULH (tmp0, csa_table[j][3])); } while (0) do { \ |
| 1093 | SUINTunsigned tmp0 = ptr[-1-j]; \ |
| 1094 | SUINTunsigned tmp1 = ptr[ j]; \ |
| 1095 | SUINTunsigned tmp2 = MULH(tmp0 + tmp1, csa_table[j][0]); \ |
| 1096 | ptr[-1-j] = 4 * (tmp2 - MULH(tmp1, csa_table[j][2])); \ |
| 1097 | ptr[ j] = 4 * (tmp2 + MULH(tmp0, csa_table[j][3])); \ |
| 1098 | } while (0) |
| 1099 | #endif |
| 1100 | |
| 1101 | static void compute_antialias(MPADecodeContext *s, GranuleDef *g) |
| 1102 | { |
| 1103 | INTFLOATint *ptr; |
| 1104 | int n, i; |
| 1105 | |
| 1106 | /* we antialias only "long" bands */ |
| 1107 | if (g->block_type == 2) { |
| 1108 | if (!g->switch_point) |
| 1109 | return; |
| 1110 | /* XXX: check this for 8000Hz case */ |
| 1111 | n = 1; |
| 1112 | } else { |
| 1113 | n = SBLIMIT32 - 1; |
| 1114 | } |
| 1115 | |
| 1116 | ptr = g->sb_hybrid + 18; |
| 1117 | for (i = n; i > 0; i--) { |
| 1118 | AA(0)do { unsigned tmp0 = ptr[-1-0]; unsigned tmp1 = ptr[ 0]; unsigned tmp2 = MULH(tmp0 + tmp1, csa_table[0][0]); ptr[-1-0] = 4 * ( tmp2 - MULH(tmp1, csa_table[0][2])); ptr[ 0] = 4 * (tmp2 + MULH (tmp0, csa_table[0][3])); } while (0); |
| 1119 | AA(1)do { unsigned tmp0 = ptr[-1-1]; unsigned tmp1 = ptr[ 1]; unsigned tmp2 = MULH(tmp0 + tmp1, csa_table[1][0]); ptr[-1-1] = 4 * ( tmp2 - MULH(tmp1, csa_table[1][2])); ptr[ 1] = 4 * (tmp2 + MULH (tmp0, csa_table[1][3])); } while (0); |
| 1120 | AA(2)do { unsigned tmp0 = ptr[-1-2]; unsigned tmp1 = ptr[ 2]; unsigned tmp2 = MULH(tmp0 + tmp1, csa_table[2][0]); ptr[-1-2] = 4 * ( tmp2 - MULH(tmp1, csa_table[2][2])); ptr[ 2] = 4 * (tmp2 + MULH (tmp0, csa_table[2][3])); } while (0); |
| 1121 | AA(3)do { unsigned tmp0 = ptr[-1-3]; unsigned tmp1 = ptr[ 3]; unsigned tmp2 = MULH(tmp0 + tmp1, csa_table[3][0]); ptr[-1-3] = 4 * ( tmp2 - MULH(tmp1, csa_table[3][2])); ptr[ 3] = 4 * (tmp2 + MULH (tmp0, csa_table[3][3])); } while (0); |
| 1122 | AA(4)do { unsigned tmp0 = ptr[-1-4]; unsigned tmp1 = ptr[ 4]; unsigned tmp2 = MULH(tmp0 + tmp1, csa_table[4][0]); ptr[-1-4] = 4 * ( tmp2 - MULH(tmp1, csa_table[4][2])); ptr[ 4] = 4 * (tmp2 + MULH (tmp0, csa_table[4][3])); } while (0); |
| 1123 | AA(5)do { unsigned tmp0 = ptr[-1-5]; unsigned tmp1 = ptr[ 5]; unsigned tmp2 = MULH(tmp0 + tmp1, csa_table[5][0]); ptr[-1-5] = 4 * ( tmp2 - MULH(tmp1, csa_table[5][2])); ptr[ 5] = 4 * (tmp2 + MULH (tmp0, csa_table[5][3])); } while (0); |
| 1124 | AA(6)do { unsigned tmp0 = ptr[-1-6]; unsigned tmp1 = ptr[ 6]; unsigned tmp2 = MULH(tmp0 + tmp1, csa_table[6][0]); ptr[-1-6] = 4 * ( tmp2 - MULH(tmp1, csa_table[6][2])); ptr[ 6] = 4 * (tmp2 + MULH (tmp0, csa_table[6][3])); } while (0); |
| 1125 | AA(7)do { unsigned tmp0 = ptr[-1-7]; unsigned tmp1 = ptr[ 7]; unsigned tmp2 = MULH(tmp0 + tmp1, csa_table[7][0]); ptr[-1-7] = 4 * ( tmp2 - MULH(tmp1, csa_table[7][2])); ptr[ 7] = 4 * (tmp2 + MULH (tmp0, csa_table[7][3])); } while (0); |
| 1126 | |
| 1127 | ptr += 18; |
| 1128 | } |
| 1129 | } |
| 1130 | #endif /* compute_antialias */ |
| 1131 | |
| 1132 | static void compute_imdct(MPADecodeContext *s, GranuleDef *g, |
| 1133 | INTFLOATint *sb_samples, INTFLOATint *mdct_buf) |
| 1134 | { |
| 1135 | INTFLOATint *win, *out_ptr, *ptr, *buf, *ptr1; |
| 1136 | INTFLOATint out2[12]; |
| 1137 | int i, j, mdct_long_end, sblimit; |
| 1138 | |
| 1139 | /* find last non zero block */ |
| 1140 | ptr = g->sb_hybrid + 576; |
| 1141 | ptr1 = g->sb_hybrid + 2 * 18; |
| 1142 | while (ptr >= ptr1) { |
| 1143 | int32_t *p; |
| 1144 | ptr -= 6; |
| 1145 | p = (int32_t*)ptr; |
| 1146 | if (p[0] | p[1] | p[2] | p[3] | p[4] | p[5]) |
| 1147 | break; |
| 1148 | } |
| 1149 | sblimit = ((ptr - g->sb_hybrid) / 18) + 1; |
| 1150 | |
| 1151 | if (g->block_type == 2) { |
| 1152 | /* XXX: check for 8000 Hz */ |
| 1153 | if (g->switch_point) |
| 1154 | mdct_long_end = 2; |
| 1155 | else |
| 1156 | mdct_long_end = 0; |
| 1157 | } else { |
| 1158 | mdct_long_end = sblimit; |
| 1159 | } |
| 1160 | |
| 1161 | s->mpadsp.RENAME(imdct36_blocks)imdct36_blocks_fixed(sb_samples, mdct_buf, g->sb_hybrid, |
| 1162 | mdct_long_end, g->switch_point, |
| 1163 | g->block_type); |
| 1164 | |
| 1165 | buf = mdct_buf + 4*18*(mdct_long_end >> 2) + (mdct_long_end & 3); |
| 1166 | ptr = g->sb_hybrid + 18 * mdct_long_end; |
| 1167 | |
| 1168 | for (j = mdct_long_end; j < sblimit; j++) { |
| 1169 | /* select frequency inversion */ |
| 1170 | win = RENAME(ff_mdct_win)ff_mdct_win_fixed[2 + (4 & -(j & 1))]; |
| 1171 | out_ptr = sb_samples + j; |
| 1172 | |
| 1173 | for (i = 0; i < 6; i++) { |
| 1174 | *out_ptr = buf[4*i]; |
| 1175 | out_ptr += SBLIMIT32; |
| 1176 | } |
| 1177 | imdct12(out2, ptr + 0); |
| 1178 | for (i = 0; i < 6; i++) { |
| 1179 | *out_ptr = MULH3(out2[i ], win[i ], 1)MULH((1)*(out2[i ]), win[i ]) + buf[4*(i + 6*1)]; |
| 1180 | buf[4*(i + 6*2)] = MULH3(out2[i + 6], win[i + 6], 1)MULH((1)*(out2[i + 6]), win[i + 6]); |
| 1181 | out_ptr += SBLIMIT32; |
| 1182 | } |
| 1183 | imdct12(out2, ptr + 1); |
| 1184 | for (i = 0; i < 6; i++) { |
| 1185 | *out_ptr = MULH3(out2[i ], win[i ], 1)MULH((1)*(out2[i ]), win[i ]) + buf[4*(i + 6*2)]; |
| 1186 | buf[4*(i + 6*0)] = MULH3(out2[i + 6], win[i + 6], 1)MULH((1)*(out2[i + 6]), win[i + 6]); |
| 1187 | out_ptr += SBLIMIT32; |
| 1188 | } |
| 1189 | imdct12(out2, ptr + 2); |
| 1190 | for (i = 0; i < 6; i++) { |
| 1191 | buf[4*(i + 6*0)] = MULH3(out2[i ], win[i ], 1)MULH((1)*(out2[i ]), win[i ]) + buf[4*(i + 6*0)]; |
| 1192 | buf[4*(i + 6*1)] = MULH3(out2[i + 6], win[i + 6], 1)MULH((1)*(out2[i + 6]), win[i + 6]); |
| 1193 | buf[4*(i + 6*2)] = 0; |
| 1194 | } |
| 1195 | ptr += 18; |
| 1196 | buf += (j&3) != 3 ? 1 : (4*18-3); |
| 1197 | } |
| 1198 | /* zero bands */ |
| 1199 | for (j = sblimit; j < SBLIMIT32; j++) { |
| 1200 | /* overlap */ |
| 1201 | out_ptr = sb_samples + j; |
| 1202 | for (i = 0; i < 18; i++) { |
| 1203 | *out_ptr = buf[4*i]; |
| 1204 | buf[4*i] = 0; |
| 1205 | out_ptr += SBLIMIT32; |
| 1206 | } |
| 1207 | buf += (j&3) != 3 ? 1 : (4*18-3); |
| 1208 | } |
| 1209 | } |
| 1210 | |
| 1211 | /* main layer3 decoding function */ |
| 1212 | static int mp_decode_layer3(MPADecodeContext *s) |
| 1213 | { |
| 1214 | int nb_granules, main_data_begin; |
| 1215 | int gr, ch, blocksplit_flag, i, j, k, n, bits_pos; |
| 1216 | GranuleDef *g; |
| 1217 | int16_t exponents[576]; //FIXME try INTFLOAT |
| 1218 | int ret; |
| 1219 | |
| 1220 | /* read side info */ |
| 1221 | if (s->lsf) { |
| 1222 | ret = handle_crc(s, ((s->nb_channels == 1) ? 8*9 : 8*17)); |
| 1223 | main_data_begin = get_bits(&s->gb, 8); |
| 1224 | skip_bits(&s->gb, s->nb_channels); |
| 1225 | nb_granules = 1; |
| 1226 | } else { |
| 1227 | ret = handle_crc(s, ((s->nb_channels == 1) ? 8*17 : 8*32)); |
| 1228 | main_data_begin = get_bits(&s->gb, 9); |
| 1229 | if (s->nb_channels == 2) |
| 1230 | skip_bits(&s->gb, 3); |
| 1231 | else |
| 1232 | skip_bits(&s->gb, 5); |
| 1233 | nb_granules = 2; |
| 1234 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1235 | s->granules[ch][0].scfsi = 0;/* all scale factors are transmitted */ |
| 1236 | s->granules[ch][1].scfsi = get_bits(&s->gb, 4); |
| 1237 | } |
| 1238 | } |
| 1239 | if (ret < 0) |
| 1240 | return ret; |
| 1241 | |
| 1242 | for (gr = 0; gr < nb_granules; gr++) { |
| 1243 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1244 | ff_dlog(s->avctx, "gr=%d ch=%d: side_info\n", gr, ch)av_log(s->avctx, 48, "gr=%d ch=%d: side_info\n", gr, ch); |
| 1245 | g = &s->granules[ch][gr]; |
| 1246 | g->part2_3_length = get_bits(&s->gb, 12); |
| 1247 | g->big_values = get_bits(&s->gb, 9); |
| 1248 | if (g->big_values > 288) { |
| 1249 | av_log(s->avctx, AV_LOG_ERROR16, "big_values too big\n"); |
| 1250 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1251 | } |
| 1252 | |
| 1253 | g->global_gain = get_bits(&s->gb, 8); |
| 1254 | /* if MS stereo only is selected, we precompute the |
| 1255 | 1/sqrt(2) renormalization factor */ |
| 1256 | if ((s->mode_ext & (MODE_EXT_MS_STEREO2 | MODE_EXT_I_STEREO1)) == |
| 1257 | MODE_EXT_MS_STEREO2) |
| 1258 | g->global_gain -= 2; |
| 1259 | if (s->lsf) |
| 1260 | g->scalefac_compress = get_bits(&s->gb, 9); |
| 1261 | else |
| 1262 | g->scalefac_compress = get_bits(&s->gb, 4); |
| 1263 | blocksplit_flag = get_bits1(&s->gb); |
| 1264 | if (blocksplit_flag) { |
| 1265 | g->block_type = get_bits(&s->gb, 2); |
| 1266 | if (g->block_type == 0) { |
| 1267 | av_log(s->avctx, AV_LOG_ERROR16, "invalid block type\n"); |
| 1268 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1269 | } |
| 1270 | g->switch_point = get_bits1(&s->gb); |
| 1271 | for (i = 0; i < 2; i++) |
| 1272 | g->table_select[i] = get_bits(&s->gb, 5); |
| 1273 | for (i = 0; i < 3; i++) |
| 1274 | g->subblock_gain[i] = get_bits(&s->gb, 3); |
| 1275 | init_short_region(s, g); |
| 1276 | } else { |
| 1277 | int region_address1, region_address2; |
| 1278 | g->block_type = 0; |
| 1279 | g->switch_point = 0; |
| 1280 | for (i = 0; i < 3; i++) |
| 1281 | g->table_select[i] = get_bits(&s->gb, 5); |
| 1282 | /* compute huffman coded region sizes */ |
| 1283 | region_address1 = get_bits(&s->gb, 4); |
| 1284 | region_address2 = get_bits(&s->gb, 3); |
| 1285 | ff_dlog(s->avctx, "region1=%d region2=%d\n",av_log(s->avctx, 48, "region1=%d region2=%d\n", region_address1 , region_address2) |
| 1286 | region_address1, region_address2)av_log(s->avctx, 48, "region1=%d region2=%d\n", region_address1 , region_address2); |
| 1287 | init_long_region(s, g, region_address1, region_address2); |
| 1288 | } |
| 1289 | region_offset2size(g); |
| 1290 | compute_band_indexes(s, g); |
| 1291 | |
| 1292 | g->preflag = 0; |
| 1293 | if (!s->lsf) |
| 1294 | g->preflag = get_bits1(&s->gb); |
| 1295 | g->scalefac_scale = get_bits1(&s->gb); |
| 1296 | g->count1table_select = get_bits1(&s->gb); |
| 1297 | ff_dlog(s->avctx, "block_type=%d switch_point=%d\n",av_log(s->avctx, 48, "block_type=%d switch_point=%d\n", g-> block_type, g->switch_point) |
| 1298 | g->block_type, g->switch_point)av_log(s->avctx, 48, "block_type=%d switch_point=%d\n", g-> block_type, g->switch_point); |
| 1299 | } |
| 1300 | } |
| 1301 | |
| 1302 | if (!s->adu_mode) { |
| 1303 | int skip; |
| 1304 | const uint8_t *ptr = s->gb.buffer + (get_bits_count(&s->gb) >> 3); |
| 1305 | s->extrasize = av_clipav_clip_c((get_bits_left(&s->gb) >> 3) - s->extrasize, 0, |
| 1306 | FFMAX(0, LAST_BUF_SIZE - s->last_buf_size)((0) > (2 * 512 + 24 - s->last_buf_size) ? (0) : (2 * 512 + 24 - s->last_buf_size))); |
| 1307 | av_assert1((get_bits_count(&s->gb) & 7) == 0)do { if (!((get_bits_count(&s->gb) & 7) == 0)) { av_log (((void*)0), 0, "Assertion %s failed at %s:%d\n", "(get_bits_count(&s->gb) & 7) == 0" , "/root/firefox-clang/media/ffvpx/libavcodec/mpegaudiodec_template.c" , 1307); abort(); } } while (0); |
| 1308 | /* now we get bits from the main_data_begin offset */ |
| 1309 | ff_dlog(s->avctx, "seekback:%d, lastbuf:%d\n",av_log(s->avctx, 48, "seekback:%d, lastbuf:%d\n", main_data_begin , s->last_buf_size) |
| 1310 | main_data_begin, s->last_buf_size)av_log(s->avctx, 48, "seekback:%d, lastbuf:%d\n", main_data_begin , s->last_buf_size); |
| 1311 | |
| 1312 | memcpy(s->last_buf + s->last_buf_size, ptr, s->extrasize); |
| 1313 | s->in_gb = s->gb; |
| 1314 | init_get_bits(&s->gb, s->last_buf, (s->last_buf_size + s->extrasize) * 8); |
| 1315 | s->last_buf_size <<= 3; |
| 1316 | for (gr = 0; gr < nb_granules && (s->last_buf_size >> 3) < main_data_begin; gr++) { |
| 1317 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1318 | g = &s->granules[ch][gr]; |
| 1319 | s->last_buf_size += g->part2_3_length; |
| 1320 | memset(g->sb_hybrid, 0, sizeof(g->sb_hybrid)); |
| 1321 | compute_imdct(s, g, &s->sb_samples[ch][18 * gr][0], s->mdct_buf[ch]); |
| 1322 | } |
| 1323 | } |
| 1324 | skip = s->last_buf_size - 8 * main_data_begin; |
| 1325 | if (skip >= s->gb.size_in_bits - s->extrasize * 8 && s->in_gb.buffer) { |
| 1326 | skip_bits_long(&s->in_gb, skip - s->gb.size_in_bits + s->extrasize * 8); |
| 1327 | s->gb = s->in_gb; |
| 1328 | s->in_gb.buffer = NULL((void*)0); |
| 1329 | s->extrasize = 0; |
| 1330 | } else { |
| 1331 | skip_bits_long(&s->gb, skip); |
| 1332 | } |
| 1333 | } else { |
| 1334 | gr = 0; |
| 1335 | s->extrasize = 0; |
| 1336 | } |
| 1337 | |
| 1338 | for (; gr < nb_granules; gr++) { |
| 1339 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1340 | g = &s->granules[ch][gr]; |
| 1341 | bits_pos = get_bits_count(&s->gb); |
| 1342 | |
| 1343 | if (!s->lsf) { |
| 1344 | uint8_t *sc; |
| 1345 | int slen, slen1, slen2; |
| 1346 | |
| 1347 | /* MPEG-1 scale factors */ |
| 1348 | slen1 = ff_slen_table[0][g->scalefac_compress]; |
| 1349 | slen2 = ff_slen_table[1][g->scalefac_compress]; |
| 1350 | ff_dlog(s->avctx, "slen1=%d slen2=%d\n", slen1, slen2)av_log(s->avctx, 48, "slen1=%d slen2=%d\n", slen1, slen2); |
| 1351 | if (g->block_type == 2) { |
| 1352 | n = g->switch_point ? 17 : 18; |
| 1353 | j = 0; |
| 1354 | if (slen1) { |
| 1355 | for (i = 0; i < n; i++) |
| 1356 | g->scale_factors[j++] = get_bits(&s->gb, slen1); |
| 1357 | } else { |
| 1358 | for (i = 0; i < n; i++) |
| 1359 | g->scale_factors[j++] = 0; |
| 1360 | } |
| 1361 | if (slen2) { |
| 1362 | for (i = 0; i < 18; i++) |
| 1363 | g->scale_factors[j++] = get_bits(&s->gb, slen2); |
| 1364 | for (i = 0; i < 3; i++) |
| 1365 | g->scale_factors[j++] = 0; |
| 1366 | } else { |
| 1367 | for (i = 0; i < 21; i++) |
| 1368 | g->scale_factors[j++] = 0; |
| 1369 | } |
| 1370 | } else { |
| 1371 | sc = s->granules[ch][0].scale_factors; |
| 1372 | j = 0; |
| 1373 | for (k = 0; k < 4; k++) { |
| 1374 | n = k == 0 ? 6 : 5; |
| 1375 | if ((g->scfsi & (0x8 >> k)) == 0) { |
| 1376 | slen = (k < 2) ? slen1 : slen2; |
| 1377 | if (slen) { |
| 1378 | for (i = 0; i < n; i++) |
| 1379 | g->scale_factors[j++] = get_bits(&s->gb, slen); |
| 1380 | } else { |
| 1381 | for (i = 0; i < n; i++) |
| 1382 | g->scale_factors[j++] = 0; |
| 1383 | } |
| 1384 | } else { |
| 1385 | /* simply copy from last granule */ |
| 1386 | for (i = 0; i < n; i++) { |
| 1387 | g->scale_factors[j] = sc[j]; |
| 1388 | j++; |
| 1389 | } |
| 1390 | } |
| 1391 | } |
| 1392 | g->scale_factors[j++] = 0; |
| 1393 | } |
| 1394 | } else { |
| 1395 | int tindex, tindex2, slen[4], sl, sf; |
| 1396 | |
| 1397 | /* LSF scale factors */ |
| 1398 | if (g->block_type == 2) |
| 1399 | tindex = g->switch_point ? 2 : 1; |
| 1400 | else |
| 1401 | tindex = 0; |
| 1402 | |
| 1403 | sf = g->scalefac_compress; |
| 1404 | if ((s->mode_ext & MODE_EXT_I_STEREO1) && ch == 1) { |
| 1405 | /* intensity stereo case */ |
| 1406 | sf >>= 1; |
| 1407 | if (sf < 180) { |
| 1408 | lsf_sf_expand(slen, sf, 6, 6, 0); |
| 1409 | tindex2 = 3; |
| 1410 | } else if (sf < 244) { |
| 1411 | lsf_sf_expand(slen, sf - 180, 4, 4, 0); |
| 1412 | tindex2 = 4; |
| 1413 | } else { |
| 1414 | lsf_sf_expand(slen, sf - 244, 3, 0, 0); |
| 1415 | tindex2 = 5; |
| 1416 | } |
| 1417 | } else { |
| 1418 | /* normal case */ |
| 1419 | if (sf < 400) { |
| 1420 | lsf_sf_expand(slen, sf, 5, 4, 4); |
| 1421 | tindex2 = 0; |
| 1422 | } else if (sf < 500) { |
| 1423 | lsf_sf_expand(slen, sf - 400, 5, 4, 0); |
| 1424 | tindex2 = 1; |
| 1425 | } else { |
| 1426 | lsf_sf_expand(slen, sf - 500, 3, 0, 0); |
| 1427 | tindex2 = 2; |
| 1428 | g->preflag = 1; |
| 1429 | } |
| 1430 | } |
| 1431 | |
| 1432 | j = 0; |
| 1433 | for (k = 0; k < 4; k++) { |
| 1434 | n = ff_lsf_nsf_table[tindex2][tindex][k]; |
| 1435 | sl = slen[k]; |
| 1436 | if (sl) { |
| 1437 | for (i = 0; i < n; i++) |
| 1438 | g->scale_factors[j++] = get_bits(&s->gb, sl); |
| 1439 | } else { |
| 1440 | for (i = 0; i < n; i++) |
| 1441 | g->scale_factors[j++] = 0; |
| 1442 | } |
| 1443 | } |
| 1444 | /* XXX: should compute exact size */ |
| 1445 | for (; j < 40; j++) |
| 1446 | g->scale_factors[j] = 0; |
| 1447 | } |
| 1448 | |
| 1449 | exponents_from_scale_factors(s, g, exponents); |
| 1450 | |
| 1451 | /* read Huffman coded residue */ |
| 1452 | huffman_decode(s, g, exponents, bits_pos + g->part2_3_length); |
| 1453 | } /* ch */ |
| 1454 | |
| 1455 | if (s->mode == MPA_JSTEREO1) |
| 1456 | compute_stereo(s, &s->granules[0][gr], &s->granules[1][gr]); |
| 1457 | |
| 1458 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1459 | g = &s->granules[ch][gr]; |
| 1460 | |
| 1461 | reorder_block(s, g); |
| 1462 | compute_antialias(s, g); |
| 1463 | compute_imdct(s, g, &s->sb_samples[ch][18 * gr][0], s->mdct_buf[ch]); |
| 1464 | } |
| 1465 | } /* gr */ |
| 1466 | if (get_bits_count(&s->gb) < 0) |
| 1467 | skip_bits_long(&s->gb, -get_bits_count(&s->gb)); |
| 1468 | return nb_granules * 18; |
| 1469 | } |
| 1470 | |
| 1471 | static int mp_decode_frame(MPADecodeContext *s, OUT_INT **samples, |
| 1472 | const uint8_t *buf, int buf_size) |
| 1473 | { |
| 1474 | int i, nb_frames, ch, ret; |
| 1475 | OUT_INT *samples_ptr; |
| 1476 | |
| 1477 | init_get_bits(&s->gb, buf + HEADER_SIZE4, (buf_size - HEADER_SIZE4) * 8); |
| 1478 | if (s->error_protection) |
| 1479 | s->crc = get_bits(&s->gb, 16); |
| 1480 | |
| 1481 | switch(s->layer) { |
| 1482 | case 1: |
| 1483 | s->avctx->frame_size = 384; |
| 1484 | nb_frames = mp_decode_layer1(s); |
| 1485 | break; |
| 1486 | case 2: |
| 1487 | s->avctx->frame_size = 1152; |
| 1488 | nb_frames = mp_decode_layer2(s); |
| 1489 | break; |
| 1490 | case 3: |
| 1491 | s->avctx->frame_size = s->lsf ? 576 : 1152; |
| 1492 | default: |
| 1493 | nb_frames = mp_decode_layer3(s); |
| 1494 | |
| 1495 | s->last_buf_size=0; |
| 1496 | if (s->in_gb.buffer) { |
| 1497 | align_get_bits(&s->gb); |
| 1498 | i = (get_bits_left(&s->gb) >> 3) - s->extrasize; |
| 1499 | if (i >= 0 && i <= BACKSTEP_SIZE512) { |
| 1500 | memmove(s->last_buf, s->gb.buffer + (get_bits_count(&s->gb) >> 3), i); |
| 1501 | s->last_buf_size=i; |
| 1502 | } else |
| 1503 | av_log(s->avctx, AV_LOG_ERROR16, "invalid old backstep %d\n", i); |
| 1504 | s->gb = s->in_gb; |
| 1505 | s->in_gb.buffer = NULL((void*)0); |
| 1506 | s->extrasize = 0; |
| 1507 | } |
| 1508 | |
| 1509 | align_get_bits(&s->gb); |
| 1510 | av_assert1((get_bits_count(&s->gb) & 7) == 0)do { if (!((get_bits_count(&s->gb) & 7) == 0)) { av_log (((void*)0), 0, "Assertion %s failed at %s:%d\n", "(get_bits_count(&s->gb) & 7) == 0" , "/root/firefox-clang/media/ffvpx/libavcodec/mpegaudiodec_template.c" , 1510); abort(); } } while (0); |
| 1511 | i = (get_bits_left(&s->gb) >> 3) - s->extrasize; |
| 1512 | if (i < 0 || i > BACKSTEP_SIZE512 || nb_frames < 0) { |
| 1513 | if (i < 0) |
| 1514 | av_log(s->avctx, AV_LOG_ERROR16, "invalid new backstep %d\n", i); |
| 1515 | i = FFMIN(BACKSTEP_SIZE, buf_size - HEADER_SIZE)((512) > (buf_size - 4) ? (buf_size - 4) : (512)); |
| 1516 | } |
| 1517 | av_assert1(i <= buf_size - HEADER_SIZE && i >= 0)do { if (!(i <= buf_size - 4 && i >= 0)) { av_log (((void*)0), 0, "Assertion %s failed at %s:%d\n", "i <= buf_size - 4 && i >= 0" , "/root/firefox-clang/media/ffvpx/libavcodec/mpegaudiodec_template.c" , 1517); abort(); } } while (0); |
| 1518 | memcpy(s->last_buf + s->last_buf_size, s->gb.buffer + buf_size - HEADER_SIZE4 - i, i); |
| 1519 | s->last_buf_size += i; |
| 1520 | } |
| 1521 | |
| 1522 | if(nb_frames < 0) |
| 1523 | return nb_frames; |
| 1524 | |
| 1525 | /* get output buffer */ |
| 1526 | if (!samples) { |
| 1527 | av_assert0(s->frame)do { if (!(s->frame)) { av_log(((void*)0), 0, "Assertion %s failed at %s:%d\n" , "s->frame", "/root/firefox-clang/media/ffvpx/libavcodec/mpegaudiodec_template.c" , 1527); abort(); } } while (0); |
| 1528 | s->frame->nb_samples = s->avctx->frame_size; |
| 1529 | if ((ret = ff_get_buffer(s->avctx, s->frame, 0)) < 0) |
| 1530 | return ret; |
| 1531 | samples = (OUT_INT **)s->frame->extended_data; |
| 1532 | } |
| 1533 | |
| 1534 | /* apply the synthesis filter */ |
| 1535 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1536 | int sample_stride; |
| 1537 | if (s->avctx->sample_fmt == OUT_FMT_PAV_SAMPLE_FMT_S16P) { |
| 1538 | samples_ptr = samples[ch]; |
| 1539 | sample_stride = 1; |
| 1540 | } else { |
| 1541 | samples_ptr = samples[0] + ch; |
| 1542 | sample_stride = s->nb_channels; |
| 1543 | } |
| 1544 | for (i = 0; i < nb_frames; i++) { |
| 1545 | RENAME(ff_mpa_synth_filter)ff_mpa_synth_filter_fixed(&s->mpadsp, s->synth_buf[ch], |
| 1546 | &(s->synth_buf_offset[ch]), |
| 1547 | RENAME(ff_mpa_synth_window)ff_mpa_synth_window_fixed, |
| 1548 | &s->dither_state, samples_ptr, |
| 1549 | sample_stride, s->sb_samples[ch][i]); |
| 1550 | samples_ptr += 32 * sample_stride; |
| 1551 | } |
| 1552 | } |
| 1553 | |
| 1554 | return nb_frames * 32 * sizeof(OUT_INT) * s->nb_channels; |
| 1555 | } |
| 1556 | |
| 1557 | static int decode_frame(AVCodecContext *avctx, AVFrame *frame, |
| 1558 | int *got_frame_ptr, AVPacket *avpkt) |
| 1559 | { |
| 1560 | const uint8_t *buf = avpkt->data; |
| 1561 | int buf_size = avpkt->size; |
| 1562 | MPADecodeContext *s = avctx->priv_data; |
| 1563 | uint32_t header; |
| 1564 | int ret; |
| 1565 | |
| 1566 | int skipped = 0; |
| 1567 | while(buf_size && !*buf){ |
| 1568 | buf++; |
| 1569 | buf_size--; |
| 1570 | skipped++; |
| 1571 | } |
| 1572 | |
| 1573 | if (buf_size < HEADER_SIZE4) |
| 1574 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1575 | |
| 1576 | header = AV_RB32(buf)av_bswap32((((const union unaligned_32 *) (buf))->l)); |
| 1577 | if (header >> 8 == AV_RB32("TAG")av_bswap32((((const union unaligned_32 *) ("TAG"))->l)) >> 8) { |
| 1578 | av_log(avctx, AV_LOG_DEBUG48, "discarding ID3 tag\n"); |
| 1579 | return buf_size + skipped; |
| 1580 | } |
| 1581 | ret = avpriv_mpegaudio_decode_header((MPADecodeHeader *)s, header); |
| 1582 | if (ret < 0) { |
| 1583 | av_log(avctx, AV_LOG_ERROR16, "Header missing\n"); |
| 1584 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1585 | } else if (ret == 1) { |
| 1586 | /* free format: prepare to compute frame size */ |
| 1587 | s->frame_size = -1; |
| 1588 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1589 | } |
| 1590 | /* update codec info */ |
| 1591 | av_channel_layout_uninit(&avctx->ch_layout); |
| 1592 | avctx->ch_layout = s->nb_channels == 1 ? (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO{ AV_CHANNEL_ORDER_NATIVE, (1), { ((1ULL << AV_CHAN_FRONT_CENTER )) }, ((void*)0) } : |
| 1593 | (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO{ AV_CHANNEL_ORDER_NATIVE, (2), { ((1ULL << AV_CHAN_FRONT_LEFT )|(1ULL << AV_CHAN_FRONT_RIGHT )) }, ((void*)0) }; |
| 1594 | if (!avctx->bit_rate) |
| 1595 | avctx->bit_rate = s->bit_rate; |
| 1596 | |
| 1597 | if (s->frame_size <= 0) { |
| 1598 | av_log(avctx, AV_LOG_ERROR16, "incomplete frame\n"); |
| 1599 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1600 | } else if (s->frame_size < buf_size) { |
| 1601 | av_log(avctx, AV_LOG_DEBUG48, "incorrect frame size - multiple frames in buffer?\n"); |
| 1602 | buf_size= s->frame_size; |
| 1603 | } |
| 1604 | |
| 1605 | s->frame = frame; |
| 1606 | |
| 1607 | ret = mp_decode_frame(s, NULL((void*)0), buf, buf_size); |
| 1608 | if (ret >= 0) { |
| 1609 | s->frame->nb_samples = avctx->frame_size; |
| 1610 | *got_frame_ptr = 1; |
| 1611 | if (avctx->codec_id != AV_CODEC_ID_AHX) |
| 1612 | avctx->sample_rate = s->sample_rate; |
| 1613 | //FIXME maybe move the other codec info stuff from above here too |
| 1614 | } else { |
| 1615 | av_log(avctx, AV_LOG_ERROR16, "Error while decoding MPEG audio frame.\n"); |
| 1616 | /* Only return an error if the bad frame makes up the whole packet or |
| 1617 | * the error is related to buffer management. |
| 1618 | * If there is more data in the packet, just consume the bad frame |
| 1619 | * instead of returning an error, which would discard the whole |
| 1620 | * packet. */ |
| 1621 | *got_frame_ptr = 0; |
| 1622 | if (buf_size == avpkt->size || ret != AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24)))) |
| 1623 | return ret; |
| 1624 | } |
| 1625 | s->frame_size = 0; |
| 1626 | return buf_size + skipped; |
| 1627 | } |
| 1628 | |
| 1629 | static av_cold__attribute__((cold)) void mp_flush(MPADecodeContext *ctx) |
| 1630 | { |
| 1631 | memset(ctx->synth_buf, 0, sizeof(ctx->synth_buf)); |
| 1632 | memset(ctx->mdct_buf, 0, sizeof(ctx->mdct_buf)); |
| 1633 | ctx->last_buf_size = 0; |
| 1634 | ctx->dither_state = 0; |
| 1635 | } |
| 1636 | |
| 1637 | static av_cold__attribute__((cold)) void flush(AVCodecContext *avctx) |
| 1638 | { |
| 1639 | mp_flush(avctx->priv_data); |
| 1640 | } |
| 1641 | |
| 1642 | #if CONFIG_MP3ADU_DECODER0 || CONFIG_MP3ADUFLOAT_DECODER0 |
| 1643 | static int decode_frame_adu(AVCodecContext *avctx, AVFrame *frame, |
| 1644 | int *got_frame_ptr, AVPacket *avpkt) |
| 1645 | { |
| 1646 | const uint8_t *buf = avpkt->data; |
| 1647 | int buf_size = avpkt->size; |
| 1648 | MPADecodeContext *s = avctx->priv_data; |
| 1649 | uint32_t header; |
| 1650 | int len, ret; |
| 1651 | |
| 1652 | len = buf_size; |
| 1653 | |
| 1654 | // Discard too short frames |
| 1655 | if (buf_size < HEADER_SIZE4) { |
| 1656 | av_log(avctx, AV_LOG_ERROR16, "Packet is too small\n"); |
| 1657 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1658 | } |
| 1659 | |
| 1660 | |
| 1661 | if (len > MPA_MAX_CODED_FRAME_SIZE1792) |
| 1662 | len = MPA_MAX_CODED_FRAME_SIZE1792; |
| 1663 | |
| 1664 | // Get header and restore sync word |
| 1665 | header = AV_RB32(buf)av_bswap32((((const union unaligned_32 *) (buf))->l)) | 0xffe00000; |
| 1666 | |
| 1667 | ret = avpriv_mpegaudio_decode_header((MPADecodeHeader *)s, header); |
| 1668 | if (ret < 0) { |
| 1669 | av_log(avctx, AV_LOG_ERROR16, "Invalid frame header\n"); |
| 1670 | return ret; |
| 1671 | } |
| 1672 | /* update codec info */ |
| 1673 | avctx->sample_rate = s->sample_rate; |
| 1674 | av_channel_layout_uninit(&avctx->ch_layout); |
| 1675 | avctx->ch_layout = s->nb_channels == 1 ? (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO{ AV_CHANNEL_ORDER_NATIVE, (1), { ((1ULL << AV_CHAN_FRONT_CENTER )) }, ((void*)0) } : |
| 1676 | (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO{ AV_CHANNEL_ORDER_NATIVE, (2), { ((1ULL << AV_CHAN_FRONT_LEFT )|(1ULL << AV_CHAN_FRONT_RIGHT )) }, ((void*)0) }; |
| 1677 | if (!avctx->bit_rate) |
| 1678 | avctx->bit_rate = s->bit_rate; |
| 1679 | |
| 1680 | s->frame_size = len; |
| 1681 | |
| 1682 | s->frame = frame; |
| 1683 | |
| 1684 | ret = mp_decode_frame(s, NULL((void*)0), buf, buf_size); |
| 1685 | if (ret < 0) { |
| 1686 | av_log(avctx, AV_LOG_ERROR16, "Error while decoding MPEG audio frame.\n"); |
| 1687 | return ret; |
| 1688 | } |
| 1689 | |
| 1690 | *got_frame_ptr = 1; |
| 1691 | |
| 1692 | return buf_size; |
| 1693 | } |
| 1694 | #endif /* CONFIG_MP3ADU_DECODER || CONFIG_MP3ADUFLOAT_DECODER */ |
| 1695 | |
| 1696 | #if CONFIG_MP3ON4_DECODER0 || CONFIG_MP3ON4FLOAT_DECODER0 |
| 1697 | |
| 1698 | /** |
| 1699 | * Context for MP3On4 decoder |
| 1700 | */ |
| 1701 | typedef struct MP3On4DecodeContext { |
| 1702 | int frames; ///< number of mp3 frames per block (number of mp3 decoder instances) |
| 1703 | int syncword; ///< syncword patch |
| 1704 | const uint8_t *coff; ///< channel offsets in output buffer |
| 1705 | MPADecodeContext *mp3decctx[5]; ///< MPADecodeContext for every decoder instance |
| 1706 | } MP3On4DecodeContext; |
| 1707 | |
| 1708 | #include "mpeg4audio.h" |
| 1709 | |
| 1710 | /* Next 3 arrays are indexed by channel config number (passed via codecdata) */ |
| 1711 | |
| 1712 | /* number of mp3 decoder instances */ |
| 1713 | static const uint8_t mp3Frames[8] = { 0, 1, 1, 2, 3, 3, 4, 5 }; |
| 1714 | |
| 1715 | /* offsets into output buffer, assume output order is FL FR C LFE BL BR SL SR */ |
| 1716 | static const uint8_t chan_offset[8][5] = { |
| 1717 | { 0 }, |
| 1718 | { 0 }, // C |
| 1719 | { 0 }, // FLR |
| 1720 | { 2, 0 }, // C FLR |
| 1721 | { 2, 0, 3 }, // C FLR BS |
| 1722 | { 2, 0, 3 }, // C FLR BLRS |
| 1723 | { 2, 0, 4, 3 }, // C FLR BLRS LFE |
| 1724 | { 2, 0, 6, 4, 3 }, // C FLR BLRS BLR LFE |
| 1725 | }; |
| 1726 | |
| 1727 | /* mp3on4 channel layouts */ |
| 1728 | static const int16_t chan_layout[8] = { |
| 1729 | 0, |
| 1730 | AV_CH_LAYOUT_MONO((1ULL << AV_CHAN_FRONT_CENTER )), |
| 1731 | AV_CH_LAYOUT_STEREO((1ULL << AV_CHAN_FRONT_LEFT )|(1ULL << AV_CHAN_FRONT_RIGHT )), |
| 1732 | AV_CH_LAYOUT_SURROUND(((1ULL << AV_CHAN_FRONT_LEFT )|(1ULL << AV_CHAN_FRONT_RIGHT ))|(1ULL << AV_CHAN_FRONT_CENTER )), |
| 1733 | AV_CH_LAYOUT_4POINT0((((1ULL << AV_CHAN_FRONT_LEFT )|(1ULL << AV_CHAN_FRONT_RIGHT ))|(1ULL << AV_CHAN_FRONT_CENTER ))|(1ULL << AV_CHAN_BACK_CENTER )), |
| 1734 | AV_CH_LAYOUT_5POINT0((((1ULL << AV_CHAN_FRONT_LEFT )|(1ULL << AV_CHAN_FRONT_RIGHT ))|(1ULL << AV_CHAN_FRONT_CENTER ))|(1ULL << AV_CHAN_SIDE_LEFT )|(1ULL << AV_CHAN_SIDE_RIGHT )), |
| 1735 | AV_CH_LAYOUT_5POINT1(((((1ULL << AV_CHAN_FRONT_LEFT )|(1ULL << AV_CHAN_FRONT_RIGHT ))|(1ULL << AV_CHAN_FRONT_CENTER ))|(1ULL << AV_CHAN_SIDE_LEFT )|(1ULL << AV_CHAN_SIDE_RIGHT ))|(1ULL << AV_CHAN_LOW_FREQUENCY )), |
| 1736 | AV_CH_LAYOUT_7POINT1((((((1ULL << AV_CHAN_FRONT_LEFT )|(1ULL << AV_CHAN_FRONT_RIGHT ))|(1ULL << AV_CHAN_FRONT_CENTER ))|(1ULL << AV_CHAN_SIDE_LEFT )|(1ULL << AV_CHAN_SIDE_RIGHT ))|(1ULL << AV_CHAN_LOW_FREQUENCY ))|(1ULL << AV_CHAN_BACK_LEFT )|(1ULL << AV_CHAN_BACK_RIGHT )) |
| 1737 | }; |
| 1738 | |
| 1739 | static av_cold__attribute__((cold)) int decode_close_mp3on4(AVCodecContext * avctx) |
| 1740 | { |
| 1741 | MP3On4DecodeContext *s = avctx->priv_data; |
| 1742 | |
| 1743 | av_freep(&s->mp3decctx[0]); |
| 1744 | |
| 1745 | return 0; |
| 1746 | } |
| 1747 | |
| 1748 | |
| 1749 | static av_cold__attribute__((cold)) int decode_init_mp3on4(AVCodecContext * avctx) |
| 1750 | { |
| 1751 | MP3On4DecodeContext *s = avctx->priv_data; |
| 1752 | MPEG4AudioConfig cfg; |
| 1753 | int i, ret; |
| 1754 | |
| 1755 | if ((avctx->extradata_size < 2) || !avctx->extradata) { |
| 1756 | av_log(avctx, AV_LOG_ERROR16, "Codec extradata missing or too short.\n"); |
| 1757 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1758 | } |
| 1759 | |
| 1760 | avpriv_mpeg4audio_get_config2(&cfg, avctx->extradata, |
| 1761 | avctx->extradata_size, 1, avctx); |
| 1762 | if (!cfg.chan_config || cfg.chan_config > 7) { |
| 1763 | av_log(avctx, AV_LOG_ERROR16, "Invalid channel config number.\n"); |
| 1764 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1765 | } |
| 1766 | s->frames = mp3Frames[cfg.chan_config]; |
| 1767 | s->coff = chan_offset[cfg.chan_config]; |
| 1768 | av_channel_layout_uninit(&avctx->ch_layout); |
| 1769 | av_channel_layout_from_mask(&avctx->ch_layout, chan_layout[cfg.chan_config]); |
| 1770 | |
| 1771 | if (cfg.sample_rate < 16000) |
| 1772 | s->syncword = 0xffe00000; |
| 1773 | else |
| 1774 | s->syncword = 0xfff00000; |
| 1775 | |
| 1776 | /* Init the first mp3 decoder in standard way, so that all tables get built |
| 1777 | * Other decoders will be initialized here copying data from the first context |
| 1778 | */ |
| 1779 | // Allocate zeroed memory for the decoder contexts |
| 1780 | s->mp3decctx[0] = av_calloc(s->frames, sizeof(*s->mp3decctx[0])); |
| 1781 | if (!s->mp3decctx[0]) |
| 1782 | return AVERROR(ENOMEM)(-(12)); |
| 1783 | ret = decode_ctx_init(avctx, s->mp3decctx[0]); |
| 1784 | if (ret < 0) |
| 1785 | return ret; |
| 1786 | s->mp3decctx[0]->adu_mode = 1; // Set adu mode |
| 1787 | |
| 1788 | /* Create a separate codec/context for each frame (first is already ok). |
| 1789 | * Each frame is 1 or 2 channels - up to 5 frames allowed |
| 1790 | */ |
| 1791 | for (i = 1; i < s->frames; i++) { |
| 1792 | s->mp3decctx[i] = s->mp3decctx[0] + i; |
| 1793 | s->mp3decctx[i]->adu_mode = 1; |
| 1794 | s->mp3decctx[i]->avctx = avctx; |
| 1795 | s->mp3decctx[i]->mpadsp = s->mp3decctx[0]->mpadsp; |
| 1796 | #if USE_FLOATS0 |
| 1797 | s->mp3decctx[i]->butterflies_float = s->mp3decctx[0]->butterflies_float; |
| 1798 | #endif |
| 1799 | } |
| 1800 | |
| 1801 | return 0; |
| 1802 | } |
| 1803 | |
| 1804 | |
| 1805 | static av_cold__attribute__((cold)) void flush_mp3on4(AVCodecContext *avctx) |
| 1806 | { |
| 1807 | int i; |
| 1808 | MP3On4DecodeContext *s = avctx->priv_data; |
| 1809 | |
| 1810 | for (i = 0; i < s->frames; i++) |
| 1811 | mp_flush(s->mp3decctx[i]); |
| 1812 | } |
| 1813 | |
| 1814 | |
| 1815 | static int decode_frame_mp3on4(AVCodecContext *avctx, AVFrame *frame, |
| 1816 | int *got_frame_ptr, AVPacket *avpkt) |
| 1817 | { |
| 1818 | const uint8_t *buf = avpkt->data; |
| 1819 | int buf_size = avpkt->size; |
| 1820 | MP3On4DecodeContext *s = avctx->priv_data; |
| 1821 | MPADecodeContext *m; |
| 1822 | int fsize, len = buf_size, out_size = 0; |
| 1823 | uint32_t header; |
| 1824 | OUT_INT **out_samples; |
| 1825 | OUT_INT *outptr[2]; |
| 1826 | int fr, ch, ret; |
| 1827 | |
| 1828 | /* get output buffer */ |
| 1829 | frame->nb_samples = MPA_FRAME_SIZE1152; |
| 1830 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
| 1831 | return ret; |
| 1832 | out_samples = (OUT_INT **)frame->extended_data; |
| 1833 | |
| 1834 | // Discard too short frames |
| 1835 | if (buf_size < HEADER_SIZE4) |
| 1836 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1837 | |
| 1838 | avctx->bit_rate = 0; |
| 1839 | |
| 1840 | ch = 0; |
| 1841 | for (fr = 0; fr < s->frames; fr++) { |
| 1842 | fsize = AV_RB16(buf)av_bswap16((((const union unaligned_16 *) (buf))->l)) >> 4; |
| 1843 | fsize = FFMIN3(fsize, len, MPA_MAX_CODED_FRAME_SIZE)((((fsize) > (len) ? (len) : (fsize))) > (1792) ? (1792 ) : (((fsize) > (len) ? (len) : (fsize)))); |
| 1844 | m = s->mp3decctx[fr]; |
| 1845 | av_assert1(m)do { if (!(m)) { av_log(((void*)0), 0, "Assertion %s failed at %s:%d\n" , "m", "/root/firefox-clang/media/ffvpx/libavcodec/mpegaudiodec_template.c" , 1845); abort(); } } while (0); |
| 1846 | |
| 1847 | if (fsize < HEADER_SIZE4) { |
| 1848 | av_log(avctx, AV_LOG_ERROR16, "Frame size smaller than header size\n"); |
| 1849 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1850 | } |
| 1851 | header = (AV_RB32(buf)av_bswap32((((const union unaligned_32 *) (buf))->l)) & 0x000fffff) | s->syncword; // patch header |
| 1852 | |
| 1853 | ret = avpriv_mpegaudio_decode_header((MPADecodeHeader *)m, header); |
| 1854 | if (ret < 0) { |
| 1855 | av_log(avctx, AV_LOG_ERROR16, "Bad header, discard block\n"); |
| 1856 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1857 | } |
| 1858 | |
| 1859 | if (ch + m->nb_channels > avctx->ch_layout.nb_channels || |
| 1860 | s->coff[fr] + m->nb_channels > avctx->ch_layout.nb_channels) { |
| 1861 | av_log(avctx, AV_LOG_ERROR16, "frame channel count exceeds codec " |
| 1862 | "channel count\n"); |
| 1863 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1864 | } |
| 1865 | ch += m->nb_channels; |
| 1866 | |
| 1867 | outptr[0] = out_samples[s->coff[fr]]; |
| 1868 | if (m->nb_channels > 1) |
| 1869 | outptr[1] = out_samples[s->coff[fr] + 1]; |
| 1870 | |
| 1871 | if ((ret = mp_decode_frame(m, outptr, buf, fsize)) < 0) { |
| 1872 | av_log(avctx, AV_LOG_ERROR16, "failed to decode channel %d\n", ch); |
| 1873 | memset(outptr[0], 0, MPA_FRAME_SIZE1152*sizeof(OUT_INT)); |
| 1874 | if (m->nb_channels > 1) |
| 1875 | memset(outptr[1], 0, MPA_FRAME_SIZE1152*sizeof(OUT_INT)); |
| 1876 | ret = m->nb_channels * MPA_FRAME_SIZE1152*sizeof(OUT_INT); |
| 1877 | } |
| 1878 | |
| 1879 | out_size += ret; |
| 1880 | buf += fsize; |
| 1881 | len -= fsize; |
| 1882 | |
| 1883 | avctx->bit_rate += m->bit_rate; |
| 1884 | } |
| 1885 | if (ch != avctx->ch_layout.nb_channels) { |
| 1886 | av_log(avctx, AV_LOG_ERROR16, "failed to decode all channels\n"); |
| 1887 | return AVERROR_INVALIDDATA(-(int)(('I') | (('N') << 8) | (('D') << 16) | (( unsigned)('A') << 24))); |
| 1888 | } |
| 1889 | |
| 1890 | /* update codec info */ |
| 1891 | avctx->sample_rate = s->mp3decctx[0]->sample_rate; |
| 1892 | |
| 1893 | frame->nb_samples = out_size / (avctx->ch_layout.nb_channels * sizeof(OUT_INT)); |
| 1894 | *got_frame_ptr = 1; |
| 1895 | |
| 1896 | return buf_size; |
| 1897 | } |
| 1898 | #endif /* CONFIG_MP3ON4_DECODER || CONFIG_MP3ON4FLOAT_DECODER */ |