| Line | Branch | Exec | Source |
|---|---|---|---|
| 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_SIZE 512 | ||
| 54 | #define EXTRABYTES 24 | ||
| 55 | #define LAST_BUF_SIZE 2 * BACKSTEP_SIZE + EXTRABYTES | ||
| 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)[SBLIMIT * 18]; /* 576 samples */ | ||
| 75 | } GranuleDef; | ||
| 76 | |||
| 77 | typedef struct MPADecodeContext { | ||
| 78 | MPA_DECODE_HEADER | ||
| 79 | uint8_t last_buf[LAST_BUF_SIZE]; | ||
| 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)[MPA_MAX_CHANNELS][512 * 2]; | ||
| 87 | int synth_buf_offset[MPA_MAX_CHANNELS]; | ||
| 88 | DECLARE_ALIGNED(32, INTFLOAT, sb_samples)[MPA_MAX_CHANNELS][36][SBLIMIT]; | ||
| 89 | INTFLOAT mdct_buf[MPA_MAX_CHANNELS][SBLIMIT * 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_SIZE 4 | ||
| 102 | |||
| 103 | #include "mpegaudiodata.h" | ||
| 104 | |||
| 105 | #include "mpegaudio_tablegen.h" | ||
| 106 | /* intensity stereo coef table */ | ||
| 107 | static INTFLOAT 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) \ | ||
| 114 | { FIXR_OLD(1.0 * (v)), FIXR_OLD(0.7937005259 * (v)), FIXR_OLD(0.6299605249 * (v)) } | ||
| 115 | |||
| 116 | static const int32_t scale_factor_mult2[3][3] = { | ||
| 117 | SCALE_GEN(4.0 / 3.0), /* 3 steps */ | ||
| 118 | SCALE_GEN(4.0 / 5.0), /* 5 steps */ | ||
| 119 | SCALE_GEN(4.0 / 9.0), /* 9 steps */ | ||
| 120 | }; | ||
| 121 | |||
| 122 | /** | ||
| 123 | * Convert region offsets to region sizes and truncate | ||
| 124 | * size to big_values. | ||
| 125 | */ | ||
| 126 | 8146 | static void region_offset2size(GranuleDef *g) | |
| 127 | { | ||
| 128 | 8146 | int i, k, j = 0; | |
| 129 | 8146 | g->region_size[2] = 576 / 2; | |
| 130 |
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32584 | for (i = 0; i < 3; i++) { |
| 131 | 24438 | k = FFMIN(g->region_size[i], g->big_values); | |
| 132 | 24438 | g->region_size[i] = k - j; | |
| 133 | 24438 | j = k; | |
| 134 | } | ||
| 135 | 8146 | } | |
| 136 | |||
| 137 | 861 | static void init_short_region(MPADecodeContext *s, GranuleDef *g) | |
| 138 | { | ||
| 139 |
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861 | if (g->block_type == 2) { |
| 140 |
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313 | if (s->sample_rate_index != 8) |
| 141 | 313 | g->region_size[0] = (36 / 2); | |
| 142 | else | ||
| 143 | ✗ | g->region_size[0] = (72 / 2); | |
| 144 | } else { | ||
| 145 |
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548 | if (s->sample_rate_index <= 2) |
| 146 | 547 | g->region_size[0] = (36 / 2); | |
| 147 |
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1 | else if (s->sample_rate_index != 8) |
| 148 | 1 | g->region_size[0] = (54 / 2); | |
| 149 | else | ||
| 150 | ✗ | g->region_size[0] = (108 / 2); | |
| 151 | } | ||
| 152 | 861 | g->region_size[1] = (576 / 2); | |
| 153 | 861 | } | |
| 154 | |||
| 155 | 7285 | static void init_long_region(MPADecodeContext *s, GranuleDef *g, | |
| 156 | int ra1, int ra2) | ||
| 157 | { | ||
| 158 | int l; | ||
| 159 | 7285 | g->region_size[0] = ff_band_index_long[s->sample_rate_index][ra1 + 1]; | |
| 160 | /* should not overflow */ | ||
| 161 | 7285 | l = FFMIN(ra1 + ra2 + 2, 22); | |
| 162 | 7285 | g->region_size[1] = ff_band_index_long[s->sample_rate_index][ l]; | |
| 163 | 7285 | } | |
| 164 | |||
| 165 | 8146 | static void compute_band_indexes(MPADecodeContext *s, GranuleDef *g) | |
| 166 | { | ||
| 167 |
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8146 | if (g->block_type == 2) { |
| 168 |
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313 | if (g->switch_point) { |
| 169 |
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13 | 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 |
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13 | if (s->sample_rate_index <= 2) |
| 175 | 13 | g->long_end = 8; | |
| 176 | else | ||
| 177 | ✗ | g->long_end = 6; | |
| 178 | |||
| 179 | 13 | g->short_start = 3; | |
| 180 | } else { | ||
| 181 | 300 | g->long_end = 0; | |
| 182 | 300 | g->short_start = 0; | |
| 183 | } | ||
| 184 | } else { | ||
| 185 | 7833 | g->short_start = 13; | |
| 186 | 7833 | g->long_end = 22; | |
| 187 | } | ||
| 188 | 8146 | } | |
| 189 | |||
| 190 | /* layer 1 unscaling */ | ||
| 191 | /* n = number of bits of the mantissa minus 1 */ | ||
| 192 | 5047920 | static inline int l1_unscale(int n, int mant, int scale_factor) | |
| 193 | { | ||
| 194 | int shift, mod; | ||
| 195 | int64_t val; | ||
| 196 | |||
| 197 | 5047920 | shift = ff_scale_factor_modshift[scale_factor]; | |
| 198 | 5047920 | mod = shift & 3; | |
| 199 | 5047920 | shift >>= 2; | |
| 200 | 5047920 | val = MUL64((int)(mant + (-1U << n) + 1), scale_factor_mult[n-1][mod]); | |
| 201 | 5047920 | shift += n; | |
| 202 | /* NOTE: at this point, 1 <= shift >= 21 + 15 */ | ||
| 203 | 5047920 | return (int)((val + (1LL << (shift - 1))) >> shift); | |
| 204 | } | ||
| 205 | |||
| 206 | 910080 | static inline int l2_unscale_group(int steps, int mant, int scale_factor) | |
| 207 | { | ||
| 208 | int shift, mod, val; | ||
| 209 | |||
| 210 | 910080 | shift = ff_scale_factor_modshift[scale_factor]; | |
| 211 | 910080 | mod = shift & 3; | |
| 212 | 910080 | shift >>= 2; | |
| 213 | |||
| 214 | 910080 | val = (mant - (steps >> 1)) * scale_factor_mult2[steps >> 2][mod]; | |
| 215 | /* NOTE: at this point, 0 <= shift <= 21 */ | ||
| 216 |
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910080 | if (shift > 0) |
| 217 | 910080 | val = (val + (1 << (shift - 1))) >> shift; | |
| 218 | 910080 | return val; | |
| 219 | } | ||
| 220 | |||
| 221 | /* compute value^(4/3) * 2^(exponent/4). It normalized to FRAC_BITS */ | ||
| 222 | 56891 | static inline int l3_unscale(int value, int exponent) | |
| 223 | { | ||
| 224 | unsigned int m; | ||
| 225 | int e; | ||
| 226 | |||
| 227 | 56891 | e = ff_table_4_3_exp [4 * value + (exponent & 3)]; | |
| 228 | 56891 | m = ff_table_4_3_value[4 * value + (exponent & 3)]; | |
| 229 | 56891 | e -= exponent >> 2; | |
| 230 | #ifdef DEBUG | ||
| 231 | if(e < 1) | ||
| 232 | av_log(NULL, AV_LOG_WARNING, "l3_unscale: e is %d\n", e); | ||
| 233 | #endif | ||
| 234 |
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56891 | if (e > (SUINT)31) |
| 235 | 10 | return 0; | |
| 236 | 56881 | m = (m + ((1U << e) >> 1)) >> e; | |
| 237 | |||
| 238 | 56881 | return m; | |
| 239 | } | ||
| 240 | |||
| 241 | 108 | static av_cold void decode_init_static(void) | |
| 242 | { | ||
| 243 | int i, j; | ||
| 244 | |||
| 245 | /* scale factor multiply for layer 1 */ | ||
| 246 |
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1728 | for (i = 0; i < 15; i++) { |
| 247 | int n, norm; | ||
| 248 | 1620 | n = i + 2; | |
| 249 | 1620 | norm = ((INT64_C(1) << n) * FRAC_ONE) / ((1 << n) - 1); | |
| 250 | 1620 | scale_factor_mult[i][0] = MULLx(norm, FIXR(1.0 * 2.0), FRAC_BITS); | |
| 251 | 1620 | scale_factor_mult[i][1] = MULLx(norm, FIXR(0.7937005259 * 2.0), FRAC_BITS); | |
| 252 | 1620 | scale_factor_mult[i][2] = MULLx(norm, FIXR(0.6299605249 * 2.0), FRAC_BITS); | |
| 253 | ff_dlog(NULL, "%d: norm=%x s=%"PRIx32" %"PRIx32" %"PRIx32"\n", i, | ||
| 254 | (unsigned)norm, | ||
| 255 | scale_factor_mult[i][0], | ||
| 256 | scale_factor_mult[i][1], | ||
| 257 | scale_factor_mult[i][2]); | ||
| 258 | } | ||
| 259 | |||
| 260 | /* compute n ^ (4/3) and store it in mantissa/exp format */ | ||
| 261 | |||
| 262 | 108 | mpegaudio_tableinit(); | |
| 263 | |||
| 264 |
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1836 | for (i = 0; i < 16; i++) { |
| 265 | double f; | ||
| 266 | int e, k; | ||
| 267 | |||
| 268 |
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5184 | for (j = 0; j < 2; j++) { |
| 269 | 3456 | e = -(j + 1) * ((i + 1) >> 1); | |
| 270 | 3456 | f = exp2(e / 4.0); | |
| 271 | 3456 | k = i & 1; | |
| 272 | 3456 | is_table_lsf[j][k ^ 1][i] = FIXR(f); | |
| 273 | 3456 | is_table_lsf[j][k ][i] = FIXR(1.0); | |
| 274 | ff_dlog(NULL, "is_table_lsf %d %d: %f %f\n", | ||
| 275 | i, j, (float) is_table_lsf[j][0][i], | ||
| 276 | (float) is_table_lsf[j][1][i]); | ||
| 277 | } | ||
| 278 | } | ||
| 279 | 108 | RENAME(ff_mpa_synth_init)(); | |
| 280 | 108 | ff_mpegaudiodec_common_init_static(); | |
| 281 | 108 | } | |
| 282 | |||
| 283 | 156 | static av_cold int decode_init(AVCodecContext * avctx) | |
| 284 | { | ||
| 285 | static AVOnce init_static_once = AV_ONCE_INIT; | ||
| 286 | 156 | MPADecodeContext *s = avctx->priv_data; | |
| 287 | |||
| 288 | 156 | s->avctx = avctx; | |
| 289 | |||
| 290 | #if USE_FLOATS | ||
| 291 | { | ||
| 292 | AVFloatDSPContext *fdsp; | ||
| 293 | 82 | fdsp = avpriv_float_dsp_alloc(avctx->flags & AV_CODEC_FLAG_BITEXACT); | |
| 294 |
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82 | if (!fdsp) |
| 295 | ✗ | return AVERROR(ENOMEM); | |
| 296 | 82 | s->butterflies_float = fdsp->butterflies_float; | |
| 297 | 82 | av_free(fdsp); | |
| 298 | } | ||
| 299 | #endif | ||
| 300 | |||
| 301 | 156 | ff_mpadsp_init(&s->mpadsp); | |
| 302 | |||
| 303 |
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156 | if (avctx->request_sample_fmt == OUT_FMT && |
| 304 | ✗ | avctx->codec_id != AV_CODEC_ID_MP3ON4) | |
| 305 | ✗ | avctx->sample_fmt = OUT_FMT; | |
| 306 | else | ||
| 307 | 156 | avctx->sample_fmt = OUT_FMT_P; | |
| 308 | 156 | s->err_recognition = avctx->err_recognition; | |
| 309 | |||
| 310 |
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156 | if (avctx->codec_id == AV_CODEC_ID_MP3ADU) |
| 311 | ✗ | s->adu_mode = 1; | |
| 312 | |||
| 313 | 156 | ff_thread_once(&init_static_once, decode_init_static); | |
| 314 | |||
| 315 | 156 | return 0; | |
| 316 | } | ||
| 317 | |||
| 318 | #define C3 FIXHR(0.86602540378443864676/2) | ||
| 319 | #define C4 FIXHR(0.70710678118654752439/2) //0.5 / cos(pi*(9)/36) | ||
| 320 | #define C5 FIXHR(0.51763809020504152469/2) //0.5 / cos(pi*(5)/36) | ||
| 321 | #define C6 FIXHR(1.93185165257813657349/4) //0.5 / cos(pi*(15)/36) | ||
| 322 | |||
| 323 | /* 12 points IMDCT. We compute it "by hand" by factorizing obvious | ||
| 324 | cases. */ | ||
| 325 | 19854 | static void imdct12(INTFLOAT *out, SUINTFLOAT *in) | |
| 326 | { | ||
| 327 | SUINTFLOAT in0, in1, in2, in3, in4, in5, t1, t2; | ||
| 328 | |||
| 329 | 19854 | in0 = in[0*3]; | |
| 330 | 19854 | in1 = in[1*3] + in[0*3]; | |
| 331 | 19854 | in2 = in[2*3] + in[1*3]; | |
| 332 | 19854 | in3 = in[3*3] + in[2*3]; | |
| 333 | 19854 | in4 = in[4*3] + in[3*3]; | |
| 334 | 19854 | in5 = in[5*3] + in[4*3]; | |
| 335 | 19854 | in5 += in3; | |
| 336 | 19854 | in3 += in1; | |
| 337 | |||
| 338 | 19854 | in2 = MULH3(in2, C3, 2); | |
| 339 | 19854 | in3 = MULH3(in3, C3, 4); | |
| 340 | |||
| 341 | 19854 | t1 = in0 - in4; | |
| 342 | 19854 | t2 = MULH3(in1 - in5, C4, 2); | |
| 343 | |||
| 344 | 19854 | out[ 7] = | |
| 345 | 19854 | out[10] = t1 + t2; | |
| 346 | 19854 | out[ 1] = | |
| 347 | 19854 | out[ 4] = t1 - t2; | |
| 348 | |||
| 349 | 19854 | in0 += SHR(in4, 1); | |
| 350 | 19854 | in4 = in0 + in2; | |
| 351 | 19854 | in5 += 2*in1; | |
| 352 | 19854 | in1 = MULH3(in5 + in3, C5, 1); | |
| 353 | 19854 | out[ 8] = | |
| 354 | 19854 | out[ 9] = in4 + in1; | |
| 355 | 19854 | out[ 2] = | |
| 356 | 19854 | out[ 3] = in4 - in1; | |
| 357 | |||
| 358 | 19854 | in0 -= in2; | |
| 359 | 19854 | in5 = MULH3(in5 - in3, C6, 2); | |
| 360 | 19854 | out[ 0] = | |
| 361 | 19854 | out[ 5] = in0 - in5; | |
| 362 | 19854 | out[ 6] = | |
| 363 | 19854 | out[11] = in0 + in5; | |
| 364 | 19854 | } | |
| 365 | |||
| 366 | 10155 | static int handle_crc(MPADecodeContext *s, int sec_len) | |
| 367 | { | ||
| 368 |
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10155 | if (s->error_protection && (s->err_recognition & AV_EF_CRCCHECK)) { |
| 369 | ✗ | const uint8_t *buf = s->gb.buffer - HEADER_SIZE; | |
| 370 | ✗ | int sec_byte_len = sec_len >> 3; | |
| 371 | ✗ | int sec_rem_bits = sec_len & 7; | |
| 372 | ✗ | const AVCRC *crc_tab = av_crc_get_table(AV_CRC_16_ANSI); | |
| 373 | uint8_t tmp_buf[4]; | ||
| 374 | ✗ | uint32_t crc_val = av_crc(crc_tab, UINT16_MAX, &buf[2], 2); | |
| 375 | ✗ | crc_val = av_crc(crc_tab, crc_val, &buf[6], sec_byte_len); | |
| 376 | |||
| 377 | ✗ | AV_WB32(tmp_buf, | |
| 378 | ((buf[6 + sec_byte_len] & (0xFF00U >> sec_rem_bits)) << 24) + | ||
| 379 | ((s->crc << 16) >> sec_rem_bits)); | ||
| 380 | |||
| 381 | ✗ | crc_val = av_crc(crc_tab, crc_val, tmp_buf, 3); | |
| 382 | |||
| 383 | ✗ | if (crc_val) { | |
| 384 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "CRC mismatch %X!\n", crc_val); | |
| 385 | ✗ | if (s->err_recognition & AV_EF_EXPLODE) | |
| 386 | ✗ | return AVERROR_INVALIDDATA; | |
| 387 | } | ||
| 388 | } | ||
| 389 | 10155 | return 0; | |
| 390 | } | ||
| 391 | |||
| 392 | /* return the number of decoded frames */ | ||
| 393 | ✗ | static int mp_decode_layer1(MPADecodeContext *s) | |
| 394 | { | ||
| 395 | int bound, i, v, n, ch, j, mant; | ||
| 396 | uint8_t allocation[MPA_MAX_CHANNELS][SBLIMIT]; | ||
| 397 | uint8_t scale_factors[MPA_MAX_CHANNELS][SBLIMIT]; | ||
| 398 | int ret; | ||
| 399 | |||
| 400 | ✗ | ret = handle_crc(s, (s->nb_channels == 1) ? 8*16 : 8*32); | |
| 401 | ✗ | if (ret < 0) | |
| 402 | ✗ | return ret; | |
| 403 | |||
| 404 | ✗ | if (s->mode == MPA_JSTEREO) | |
| 405 | ✗ | bound = (s->mode_ext + 1) * 4; | |
| 406 | else | ||
| 407 | ✗ | bound = SBLIMIT; | |
| 408 | |||
| 409 | /* allocation bits */ | ||
| 410 | ✗ | for (i = 0; i < bound; i++) { | |
| 411 | ✗ | for (ch = 0; ch < s->nb_channels; ch++) { | |
| 412 | ✗ | allocation[ch][i] = get_bits(&s->gb, 4); | |
| 413 | } | ||
| 414 | } | ||
| 415 | ✗ | for (i = bound; i < SBLIMIT; i++) | |
| 416 | ✗ | allocation[0][i] = get_bits(&s->gb, 4); | |
| 417 | |||
| 418 | /* scale factors */ | ||
| 419 | ✗ | for (i = 0; i < bound; i++) { | |
| 420 | ✗ | for (ch = 0; ch < s->nb_channels; ch++) { | |
| 421 | ✗ | if (allocation[ch][i]) | |
| 422 | ✗ | scale_factors[ch][i] = get_bits(&s->gb, 6); | |
| 423 | } | ||
| 424 | } | ||
| 425 | ✗ | for (i = bound; i < SBLIMIT; i++) { | |
| 426 | ✗ | if (allocation[0][i]) { | |
| 427 | ✗ | scale_factors[0][i] = get_bits(&s->gb, 6); | |
| 428 | ✗ | scale_factors[1][i] = get_bits(&s->gb, 6); | |
| 429 | } | ||
| 430 | } | ||
| 431 | |||
| 432 | /* compute samples */ | ||
| 433 | ✗ | for (j = 0; j < 12; j++) { | |
| 434 | ✗ | for (i = 0; i < bound; i++) { | |
| 435 | ✗ | for (ch = 0; ch < s->nb_channels; ch++) { | |
| 436 | ✗ | n = allocation[ch][i]; | |
| 437 | ✗ | if (n) { | |
| 438 | ✗ | mant = get_bits(&s->gb, n + 1); | |
| 439 | ✗ | v = l1_unscale(n, mant, scale_factors[ch][i]); | |
| 440 | } else { | ||
| 441 | ✗ | v = 0; | |
| 442 | } | ||
| 443 | ✗ | s->sb_samples[ch][j][i] = v; | |
| 444 | } | ||
| 445 | } | ||
| 446 | ✗ | for (i = bound; i < SBLIMIT; i++) { | |
| 447 | ✗ | n = allocation[0][i]; | |
| 448 | ✗ | if (n) { | |
| 449 | ✗ | mant = get_bits(&s->gb, n + 1); | |
| 450 | ✗ | v = l1_unscale(n, mant, scale_factors[0][i]); | |
| 451 | ✗ | s->sb_samples[0][j][i] = v; | |
| 452 | ✗ | v = l1_unscale(n, mant, scale_factors[1][i]); | |
| 453 | ✗ | s->sb_samples[1][j][i] = v; | |
| 454 | } else { | ||
| 455 | ✗ | s->sb_samples[0][j][i] = 0; | |
| 456 | ✗ | s->sb_samples[1][j][i] = 0; | |
| 457 | } | ||
| 458 | } | ||
| 459 | } | ||
| 460 | ✗ | return 12; | |
| 461 | } | ||
| 462 | |||
| 463 | 7341 | static int mp_decode_layer2(MPADecodeContext *s) | |
| 464 | { | ||
| 465 | int sblimit; /* number of used subbands */ | ||
| 466 | const unsigned char *alloc_table; | ||
| 467 | int table, bit_alloc_bits, i, j, ch, bound, v; | ||
| 468 | unsigned char bit_alloc[MPA_MAX_CHANNELS][SBLIMIT]; | ||
| 469 | unsigned char scale_code[MPA_MAX_CHANNELS][SBLIMIT]; | ||
| 470 | unsigned char scale_factors[MPA_MAX_CHANNELS][SBLIMIT][3], *sf; | ||
| 471 | int scale, qindex, bits, steps, k, l, m, b; | ||
| 472 | int ret; | ||
| 473 | |||
| 474 | /* select decoding table */ | ||
| 475 | 7341 | table = ff_mpa_l2_select_table(s->bit_rate / 1000, s->nb_channels, | |
| 476 | s->sample_rate, s->lsf); | ||
| 477 | 7341 | sblimit = ff_mpa_sblimit_table[table]; | |
| 478 | 7341 | alloc_table = ff_mpa_alloc_tables[table]; | |
| 479 | |||
| 480 |
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7341 | if (s->mode == MPA_JSTEREO) |
| 481 | ✗ | bound = (s->mode_ext + 1) * 4; | |
| 482 | else | ||
| 483 | 7341 | bound = sblimit; | |
| 484 | |||
| 485 | ff_dlog(s->avctx, "bound=%d sblimit=%d\n", bound, sblimit); | ||
| 486 | |||
| 487 | /* sanity check */ | ||
| 488 |
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7341 | if (bound > sblimit) |
| 489 | ✗ | bound = sblimit; | |
| 490 | |||
| 491 | /* parse bit allocation */ | ||
| 492 | 7341 | j = 0; | |
| 493 |
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224811 | for (i = 0; i < bound; i++) { |
| 494 | 217470 | bit_alloc_bits = alloc_table[j]; | |
| 495 |
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455589 | for (ch = 0; ch < s->nb_channels; ch++) |
| 496 | 238119 | bit_alloc[ch][i] = get_bits(&s->gb, bit_alloc_bits); | |
| 497 | 217470 | j += 1 << bit_alloc_bits; | |
| 498 | } | ||
| 499 |
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7341 | for (i = bound; i < sblimit; i++) { |
| 500 | ✗ | bit_alloc_bits = alloc_table[j]; | |
| 501 | ✗ | v = get_bits(&s->gb, bit_alloc_bits); | |
| 502 | ✗ | bit_alloc[0][i] = v; | |
| 503 | ✗ | bit_alloc[1][i] = v; | |
| 504 | ✗ | j += 1 << bit_alloc_bits; | |
| 505 | } | ||
| 506 | |||
| 507 | /* scale codes */ | ||
| 508 |
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224811 | for (i = 0; i < sblimit; i++) { |
| 509 |
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455589 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 510 |
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238119 | if (bit_alloc[ch][i]) |
| 511 | 165500 | scale_code[ch][i] = get_bits(&s->gb, 2); | |
| 512 | } | ||
| 513 | } | ||
| 514 | |||
| 515 | 7341 | ret = handle_crc(s, get_bits_count(&s->gb) - 16); | |
| 516 |
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7341 | if (ret < 0) |
| 517 | ✗ | return ret; | |
| 518 | |||
| 519 | /* scale factors */ | ||
| 520 |
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224811 | for (i = 0; i < sblimit; i++) { |
| 521 |
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455589 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 522 |
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238119 | if (bit_alloc[ch][i]) { |
| 523 | 165500 | sf = scale_factors[ch][i]; | |
| 524 |
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165500 | switch (scale_code[ch][i]) { |
| 525 | 2951 | default: | |
| 526 | case 0: | ||
| 527 | 2951 | sf[0] = get_bits(&s->gb, 6); | |
| 528 | 2951 | sf[1] = get_bits(&s->gb, 6); | |
| 529 | 2951 | sf[2] = get_bits(&s->gb, 6); | |
| 530 | 2951 | break; | |
| 531 | 154880 | case 2: | |
| 532 | 154880 | sf[0] = get_bits(&s->gb, 6); | |
| 533 | 154880 | sf[1] = sf[0]; | |
| 534 | 154880 | sf[2] = sf[0]; | |
| 535 | 154880 | break; | |
| 536 | 2551 | case 1: | |
| 537 | 2551 | sf[0] = get_bits(&s->gb, 6); | |
| 538 | 2551 | sf[2] = get_bits(&s->gb, 6); | |
| 539 | 2551 | sf[1] = sf[0]; | |
| 540 | 2551 | break; | |
| 541 | 5118 | case 3: | |
| 542 | 5118 | sf[0] = get_bits(&s->gb, 6); | |
| 543 | 5118 | sf[2] = get_bits(&s->gb, 6); | |
| 544 | 5118 | sf[1] = sf[2]; | |
| 545 | 5118 | break; | |
| 546 | } | ||
| 547 | } | ||
| 548 | } | ||
| 549 | } | ||
| 550 | |||
| 551 | /* samples */ | ||
| 552 |
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29364 | for (k = 0; k < 3; k++) { |
| 553 |
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110115 | for (l = 0; l < 12; l += 3) { |
| 554 | 88092 | j = 0; | |
| 555 |
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2697732 | for (i = 0; i < bound; i++) { |
| 556 | 2609640 | bit_alloc_bits = alloc_table[j]; | |
| 557 |
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5467068 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 558 | 2857428 | b = bit_alloc[ch][i]; | |
| 559 |
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2857428 | if (b) { |
| 560 | 1986000 | scale = scale_factors[ch][i][k]; | |
| 561 | 1986000 | qindex = alloc_table[j+b]; | |
| 562 | 1986000 | bits = ff_mpa_quant_bits[qindex]; | |
| 563 |
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1986000 | if (bits < 0) { |
| 564 | int v2; | ||
| 565 | /* 3 values at the same time */ | ||
| 566 | 303360 | v = get_bits(&s->gb, -bits); | |
| 567 | 303360 | v2 = ff_division_tabs[qindex][v]; | |
| 568 | 303360 | steps = ff_mpa_quant_steps[qindex]; | |
| 569 | |||
| 570 | 604344 | s->sb_samples[ch][k * 12 + l + 0][i] = | |
| 571 | 303360 | l2_unscale_group(steps, v2 & 15, scale); | |
| 572 | 604344 | s->sb_samples[ch][k * 12 + l + 1][i] = | |
| 573 | 303360 | l2_unscale_group(steps, (v2 >> 4) & 15, scale); | |
| 574 | 303360 | s->sb_samples[ch][k * 12 + l + 2][i] = | |
| 575 | 303360 | l2_unscale_group(steps, v2 >> 8 , scale); | |
| 576 | } else { | ||
| 577 |
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6730560 | for (m = 0; m < 3; m++) { |
| 578 | 5047920 | v = get_bits(&s->gb, bits); | |
| 579 | 5047920 | v = l1_unscale(bits - 1, v, scale); | |
| 580 | 5047920 | s->sb_samples[ch][k * 12 + l + m][i] = v; | |
| 581 | } | ||
| 582 | } | ||
| 583 | } else { | ||
| 584 | 871428 | s->sb_samples[ch][k * 12 + l + 0][i] = 0; | |
| 585 | 871428 | s->sb_samples[ch][k * 12 + l + 1][i] = 0; | |
| 586 | 871428 | s->sb_samples[ch][k * 12 + l + 2][i] = 0; | |
| 587 | } | ||
| 588 | } | ||
| 589 | /* next subband in alloc table */ | ||
| 590 | 2609640 | j += 1 << bit_alloc_bits; | |
| 591 | } | ||
| 592 | /* XXX: find a way to avoid this duplication of code */ | ||
| 593 |
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88092 | for (i = bound; i < sblimit; i++) { |
| 594 | ✗ | bit_alloc_bits = alloc_table[j]; | |
| 595 | ✗ | b = bit_alloc[0][i]; | |
| 596 | ✗ | if (b) { | |
| 597 | int mant, scale0, scale1; | ||
| 598 | ✗ | scale0 = scale_factors[0][i][k]; | |
| 599 | ✗ | scale1 = scale_factors[1][i][k]; | |
| 600 | ✗ | qindex = alloc_table[j + b]; | |
| 601 | ✗ | bits = ff_mpa_quant_bits[qindex]; | |
| 602 | ✗ | if (bits < 0) { | |
| 603 | /* 3 values at the same time */ | ||
| 604 | ✗ | v = get_bits(&s->gb, -bits); | |
| 605 | ✗ | steps = ff_mpa_quant_steps[qindex]; | |
| 606 | ✗ | mant = v % steps; | |
| 607 | ✗ | v = v / steps; | |
| 608 | ✗ | s->sb_samples[0][k * 12 + l + 0][i] = | |
| 609 | ✗ | l2_unscale_group(steps, mant, scale0); | |
| 610 | ✗ | s->sb_samples[1][k * 12 + l + 0][i] = | |
| 611 | ✗ | l2_unscale_group(steps, mant, scale1); | |
| 612 | ✗ | mant = v % steps; | |
| 613 | ✗ | v = v / steps; | |
| 614 | ✗ | s->sb_samples[0][k * 12 + l + 1][i] = | |
| 615 | ✗ | l2_unscale_group(steps, mant, scale0); | |
| 616 | ✗ | s->sb_samples[1][k * 12 + l + 1][i] = | |
| 617 | ✗ | l2_unscale_group(steps, mant, scale1); | |
| 618 | ✗ | s->sb_samples[0][k * 12 + l + 2][i] = | |
| 619 | ✗ | l2_unscale_group(steps, v, scale0); | |
| 620 | ✗ | s->sb_samples[1][k * 12 + l + 2][i] = | |
| 621 | ✗ | l2_unscale_group(steps, v, scale1); | |
| 622 | } else { | ||
| 623 | ✗ | for (m = 0; m < 3; m++) { | |
| 624 | ✗ | mant = get_bits(&s->gb, bits); | |
| 625 | ✗ | s->sb_samples[0][k * 12 + l + m][i] = | |
| 626 | ✗ | l1_unscale(bits - 1, mant, scale0); | |
| 627 | ✗ | s->sb_samples[1][k * 12 + l + m][i] = | |
| 628 | ✗ | l1_unscale(bits - 1, mant, scale1); | |
| 629 | } | ||
| 630 | } | ||
| 631 | } else { | ||
| 632 | ✗ | s->sb_samples[0][k * 12 + l + 0][i] = 0; | |
| 633 | ✗ | s->sb_samples[0][k * 12 + l + 1][i] = 0; | |
| 634 | ✗ | s->sb_samples[0][k * 12 + l + 2][i] = 0; | |
| 635 | ✗ | s->sb_samples[1][k * 12 + l + 0][i] = 0; | |
| 636 | ✗ | s->sb_samples[1][k * 12 + l + 1][i] = 0; | |
| 637 | ✗ | s->sb_samples[1][k * 12 + l + 2][i] = 0; | |
| 638 | } | ||
| 639 | /* next subband in alloc table */ | ||
| 640 | ✗ | j += 1 << bit_alloc_bits; | |
| 641 | } | ||
| 642 | /* fill remaining samples to zero */ | ||
| 643 |
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297396 | for (i = sblimit; i < SBLIMIT; i++) { |
| 644 |
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454596 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 645 | 245292 | s->sb_samples[ch][k * 12 + l + 0][i] = 0; | |
| 646 | 245292 | s->sb_samples[ch][k * 12 + l + 1][i] = 0; | |
| 647 | 245292 | s->sb_samples[ch][k * 12 + l + 2][i] = 0; | |
| 648 | } | ||
| 649 | } | ||
| 650 | } | ||
| 651 | } | ||
| 652 | 7341 | return 3 * 12; | |
| 653 | } | ||
| 654 | |||
| 655 | #define SPLIT(dst,sf,n) \ | ||
| 656 | if (n == 3) { \ | ||
| 657 | int m = (sf * 171) >> 9; \ | ||
| 658 | dst = sf - 3 * m; \ | ||
| 659 | sf = m; \ | ||
| 660 | } else if (n == 4) { \ | ||
| 661 | dst = sf & 3; \ | ||
| 662 | sf >>= 2; \ | ||
| 663 | } else if (n == 5) { \ | ||
| 664 | int m = (sf * 205) >> 10; \ | ||
| 665 | dst = sf - 5 * m; \ | ||
| 666 | sf = m; \ | ||
| 667 | } else if (n == 6) { \ | ||
| 668 | int m = (sf * 171) >> 10; \ | ||
| 669 | dst = sf - 6 * m; \ | ||
| 670 | sf = m; \ | ||
| 671 | } else { \ | ||
| 672 | dst = 0; \ | ||
| 673 | } | ||
| 674 | |||
| 675 | 4 | static av_always_inline void lsf_sf_expand(int *slen, int sf, int n1, int n2, | |
| 676 | int n3) | ||
| 677 | { | ||
| 678 |
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4 | SPLIT(slen[3], sf, n3) |
| 679 |
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4 | SPLIT(slen[2], sf, n2) |
| 680 |
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4 | SPLIT(slen[1], sf, n1) |
| 681 | 4 | slen[0] = sf; | |
| 682 | 4 | } | |
| 683 | |||
| 684 | 8138 | static void exponents_from_scale_factors(MPADecodeContext *s, GranuleDef *g, | |
| 685 | int16_t *exponents) | ||
| 686 | { | ||
| 687 | const uint8_t *bstab, *pretab; | ||
| 688 | int len, i, j, k, l, v0, shift, gain, gains[3]; | ||
| 689 | int16_t *exp_ptr; | ||
| 690 | |||
| 691 | 8138 | exp_ptr = exponents; | |
| 692 | 8138 | gain = g->global_gain - 210; | |
| 693 | 8138 | shift = g->scalefac_scale + 1; | |
| 694 | |||
| 695 | 8138 | bstab = ff_band_size_long[s->sample_rate_index]; | |
| 696 | 8138 | pretab = ff_mpa_pretab[g->preflag]; | |
| 697 |
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180436 | for (i = 0; i < g->long_end; i++) { |
| 698 | 172298 | v0 = gain - ((g->scale_factors[i] + pretab[i]) << shift) + 400; | |
| 699 | 172298 | len = bstab[i]; | |
| 700 |
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4681118 | for (j = len; j > 0; j--) |
| 701 | 4508820 | *exp_ptr++ = v0; | |
| 702 | } | ||
| 703 | |||
| 704 |
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8138 | if (g->short_start < 13) { |
| 705 | 311 | bstab = ff_band_size_short[s->sample_rate_index]; | |
| 706 | 311 | gains[0] = gain - (g->subblock_gain[0] << 3); | |
| 707 | 311 | gains[1] = gain - (g->subblock_gain[1] << 3); | |
| 708 | 311 | gains[2] = gain - (g->subblock_gain[2] << 3); | |
| 709 | 311 | k = g->long_end; | |
| 710 |
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4315 | for (i = g->short_start; i < 13; i++) { |
| 711 | 4004 | len = bstab[i]; | |
| 712 |
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16016 | for (l = 0; l < 3; l++) { |
| 713 | 12012 | v0 = gains[l] - (g->scale_factors[k++] << shift) + 400; | |
| 714 |
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190680 | for (j = len; j > 0; j--) |
| 715 | 178668 | *exp_ptr++ = v0; | |
| 716 | } | ||
| 717 | } | ||
| 718 | } | ||
| 719 | 8138 | } | |
| 720 | |||
| 721 | 16851 | static void switch_buffer(MPADecodeContext *s, int *pos, int *end_pos, | |
| 722 | int *end_pos2) | ||
| 723 | { | ||
| 724 |
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16851 | if (s->in_gb.buffer && *pos >= s->gb.size_in_bits - s->extrasize * 8) { |
| 725 | 939 | s->gb = s->in_gb; | |
| 726 | 939 | s->in_gb.buffer = NULL; | |
| 727 | 939 | s->extrasize = 0; | |
| 728 | av_assert2((get_bits_count(&s->gb) & 7) == 0); | ||
| 729 | 939 | skip_bits_long(&s->gb, *pos - *end_pos); | |
| 730 | 939 | *end_pos2 = | |
| 731 | 939 | *end_pos = *end_pos2 + get_bits_count(&s->gb) - *pos; | |
| 732 | 939 | *pos = get_bits_count(&s->gb); | |
| 733 | } | ||
| 734 | 16851 | } | |
| 735 | |||
| 736 | /* Following is an optimized code for | ||
| 737 | INTFLOAT v = *src | ||
| 738 | if(get_bits1(&s->gb)) | ||
| 739 | v = -v; | ||
| 740 | *dst = v; | ||
| 741 | */ | ||
| 742 | #if USE_FLOATS | ||
| 743 | #define READ_FLIP_SIGN(dst,src) \ | ||
| 744 | v = AV_RN32A(src) ^ (get_bits1(&s->gb) << 31); \ | ||
| 745 | AV_WN32A(dst, v); | ||
| 746 | #else | ||
| 747 | #define READ_FLIP_SIGN(dst,src) \ | ||
| 748 | v = -get_bits1(&s->gb); \ | ||
| 749 | *(dst) = (*(src) ^ v) - v; | ||
| 750 | #endif | ||
| 751 | |||
| 752 | 8138 | static int huffman_decode(MPADecodeContext *s, GranuleDef *g, | |
| 753 | int16_t *exponents, int end_pos2) | ||
| 754 | { | ||
| 755 | int s_index; | ||
| 756 | int i; | ||
| 757 | int last_pos, bits_left; | ||
| 758 | VLC *vlc; | ||
| 759 | 8138 | int end_pos = FFMIN(end_pos2, s->gb.size_in_bits - s->extrasize * 8); | |
| 760 | |||
| 761 | /* low frequencies (called big values) */ | ||
| 762 | 8138 | s_index = 0; | |
| 763 |
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32552 | for (i = 0; i < 3; i++) { |
| 764 | const VLCElem *vlctab; | ||
| 765 | int j, k, l, linbits; | ||
| 766 | 24414 | j = g->region_size[i]; | |
| 767 |
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24414 | if (j == 0) |
| 768 | 1345 | continue; | |
| 769 | /* select vlc table */ | ||
| 770 | 23069 | k = g->table_select[i]; | |
| 771 | 23069 | l = ff_mpa_huff_data[k][0]; | |
| 772 | 23069 | linbits = ff_mpa_huff_data[k][1]; | |
| 773 | |||
| 774 |
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23069 | if (!l) { |
| 775 | 92 | memset(&g->sb_hybrid[s_index], 0, sizeof(*g->sb_hybrid) * 2 * j); | |
| 776 | 92 | s_index += 2 * j; | |
| 777 | 92 | continue; | |
| 778 | } | ||
| 779 | 22977 | vlctab = ff_huff_vlc[l]; | |
| 780 | |||
| 781 | /* read huffcode and compute each couple */ | ||
| 782 |
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|
911329 | for (; j > 0; j--) { |
| 783 | int exponent, x, y; | ||
| 784 | int v; | ||
| 785 | 888352 | int pos = get_bits_count(&s->gb); | |
| 786 | |||
| 787 |
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|
888352 | if (pos >= end_pos){ |
| 788 | 789 | switch_buffer(s, &pos, &end_pos, &end_pos2); | |
| 789 |
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|
789 | if (pos >= end_pos) |
| 790 | ✗ | break; | |
| 791 | } | ||
| 792 | 888352 | y = get_vlc2(&s->gb, vlctab, 7, 3); | |
| 793 | |||
| 794 |
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|
888352 | if (!y) { |
| 795 | 216377 | g->sb_hybrid[s_index ] = | |
| 796 | 216377 | g->sb_hybrid[s_index + 1] = 0; | |
| 797 | 216377 | s_index += 2; | |
| 798 | 216377 | continue; | |
| 799 | } | ||
| 800 | |||
| 801 | 671975 | exponent= exponents[s_index]; | |
| 802 | |||
| 803 | ff_dlog(s->avctx, "region=%d n=%d y=%d exp=%d\n", | ||
| 804 | i, g->region_size[i] - j, y, exponent); | ||
| 805 |
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|
671975 | if (y & 16) { |
| 806 | 427016 | x = y >> 5; | |
| 807 | 427016 | y = y & 0x0f; | |
| 808 |
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|
427016 | if (x < 15) { |
| 809 | 400996 | READ_FLIP_SIGN(g->sb_hybrid + s_index, RENAME(expval_table)[exponent] + x) | |
| 810 | } else { | ||
| 811 | 26020 | x += get_bitsz(&s->gb, linbits); | |
| 812 | 26020 | v = l3_unscale(x, exponent); | |
| 813 |
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|
26020 | if (get_bits1(&s->gb)) |
| 814 | 12480 | v = -v; | |
| 815 | 26020 | g->sb_hybrid[s_index] = v; | |
| 816 | } | ||
| 817 |
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|
427016 | if (y < 15) { |
| 818 | 401952 | READ_FLIP_SIGN(g->sb_hybrid + s_index + 1, RENAME(expval_table)[exponent] + y) | |
| 819 | } else { | ||
| 820 | 25064 | y += get_bitsz(&s->gb, linbits); | |
| 821 | 25064 | v = l3_unscale(y, exponent); | |
| 822 |
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|
25064 | if (get_bits1(&s->gb)) |
| 823 | 11937 | v = -v; | |
| 824 | 25064 | g->sb_hybrid[s_index + 1] = v; | |
| 825 | } | ||
| 826 | } else { | ||
| 827 | 244959 | x = y >> 5; | |
| 828 | 244959 | y = y & 0x0f; | |
| 829 | 244959 | x += y; | |
| 830 |
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|
244959 | if (x < 15) { |
| 831 |
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|
239152 | READ_FLIP_SIGN(g->sb_hybrid + s_index + !!y, RENAME(expval_table)[exponent] + x) |
| 832 | } else { | ||
| 833 | 5807 | x += get_bitsz(&s->gb, linbits); | |
| 834 | 5807 | v = l3_unscale(x, exponent); | |
| 835 |
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|
5807 | if (get_bits1(&s->gb)) |
| 836 | 2116 | v = -v; | |
| 837 | 5807 | g->sb_hybrid[s_index+!!y] = v; | |
| 838 | } | ||
| 839 | 244959 | g->sb_hybrid[s_index + !y] = 0; | |
| 840 | } | ||
| 841 | 671975 | s_index += 2; | |
| 842 | } | ||
| 843 | } | ||
| 844 | |||
| 845 | /* high frequencies */ | ||
| 846 | 8138 | vlc = &ff_huff_quad_vlc[g->count1table_select]; | |
| 847 | 8138 | last_pos = 0; | |
| 848 |
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|
227243 | while (s_index <= 572) { |
| 849 | int pos, code; | ||
| 850 | 226942 | pos = get_bits_count(&s->gb); | |
| 851 |
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|
226942 | if (pos >= end_pos) { |
| 852 |
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|
7924 | if (pos > end_pos2 && last_pos) { |
| 853 | /* some encoders generate an incorrect size for this | ||
| 854 | part. We must go back into the data */ | ||
| 855 | ✗ | s_index -= 4; | |
| 856 | ✗ | skip_bits_long(&s->gb, last_pos - pos); | |
| 857 | ✗ | av_log(s->avctx, AV_LOG_INFO, "overread, skip %d enddists: %d %d\n", last_pos - pos, end_pos-pos, end_pos2-pos); | |
| 858 | ✗ | if(s->err_recognition & (AV_EF_BITSTREAM|AV_EF_COMPLIANT)) | |
| 859 | ✗ | s_index=0; | |
| 860 | 7837 | break; | |
| 861 | } | ||
| 862 | 7924 | switch_buffer(s, &pos, &end_pos, &end_pos2); | |
| 863 |
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|
7924 | if (pos >= end_pos) |
| 864 | 7837 | break; | |
| 865 | } | ||
| 866 | 219105 | last_pos = pos; | |
| 867 | |||
| 868 | 219105 | code = get_vlc2(&s->gb, vlc->table, vlc->bits, 1); | |
| 869 | ff_dlog(s->avctx, "t=%d code=%d\n", g->count1table_select, code); | ||
| 870 | 219105 | g->sb_hybrid[s_index + 0] = | |
| 871 | 219105 | g->sb_hybrid[s_index + 1] = | |
| 872 | 219105 | g->sb_hybrid[s_index + 2] = | |
| 873 | 219105 | g->sb_hybrid[s_index + 3] = 0; | |
| 874 |
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|
368106 | while (code) { |
| 875 | static const int idxtab[16] = { 3,3,2,2,1,1,1,1,0,0,0,0,0,0,0,0 }; | ||
| 876 | int v; | ||
| 877 | 149001 | int pos = s_index + idxtab[code]; | |
| 878 | 149001 | code ^= 8 >> idxtab[code]; | |
| 879 | 149001 | READ_FLIP_SIGN(g->sb_hybrid + pos, RENAME(exp_table)+exponents[pos]) | |
| 880 | } | ||
| 881 | 219105 | s_index += 4; | |
| 882 | } | ||
| 883 | /* skip extension bits */ | ||
| 884 | 8138 | bits_left = end_pos2 - get_bits_count(&s->gb); | |
| 885 |
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|
8138 | if (bits_left < 0 && (s->err_recognition & (AV_EF_BUFFER|AV_EF_COMPLIANT))) { |
| 886 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "bits_left=%d\n", bits_left); | |
| 887 | ✗ | s_index=0; | |
| 888 |
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|
8138 | } else if (bits_left > 0 && (s->err_recognition & (AV_EF_BUFFER|AV_EF_AGGRESSIVE))) { |
| 889 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "bits_left=%d\n", bits_left); | |
| 890 | ✗ | s_index = 0; | |
| 891 | } | ||
| 892 | 8138 | memset(&g->sb_hybrid[s_index], 0, sizeof(*g->sb_hybrid) * (576 - s_index)); | |
| 893 | 8138 | skip_bits_long(&s->gb, bits_left); | |
| 894 | |||
| 895 | 8138 | i = get_bits_count(&s->gb); | |
| 896 | 8138 | switch_buffer(s, &i, &end_pos, &end_pos2); | |
| 897 | |||
| 898 | 8138 | return 0; | |
| 899 | } | ||
| 900 | |||
| 901 | /* Reorder short blocks from bitstream order to interleaved order. It | ||
| 902 | would be faster to do it in parsing, but the code would be far more | ||
| 903 | complicated */ | ||
| 904 | 8138 | static void reorder_block(MPADecodeContext *s, GranuleDef *g) | |
| 905 | { | ||
| 906 | int i, j, len; | ||
| 907 | INTFLOAT *ptr, *dst, *ptr1; | ||
| 908 | INTFLOAT tmp[576]; | ||
| 909 | |||
| 910 |
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|
8138 | if (g->block_type != 2) |
| 911 | 7827 | return; | |
| 912 | |||
| 913 |
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|
311 | if (g->switch_point) { |
| 914 |
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|
13 | if (s->sample_rate_index != 8) |
| 915 | 13 | ptr = g->sb_hybrid + 36; | |
| 916 | else | ||
| 917 | ✗ | ptr = g->sb_hybrid + 72; | |
| 918 | } else { | ||
| 919 | 298 | ptr = g->sb_hybrid; | |
| 920 | } | ||
| 921 | |||
| 922 |
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|
4315 | for (i = g->short_start; i < 13; i++) { |
| 923 | 4004 | len = ff_band_size_short[s->sample_rate_index][i]; | |
| 924 | 4004 | ptr1 = ptr; | |
| 925 | 4004 | dst = tmp; | |
| 926 |
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|
63560 | for (j = len; j > 0; j--) { |
| 927 | 59556 | *dst++ = ptr[0*len]; | |
| 928 | 59556 | *dst++ = ptr[1*len]; | |
| 929 | 59556 | *dst++ = ptr[2*len]; | |
| 930 | 59556 | ptr++; | |
| 931 | } | ||
| 932 | 4004 | ptr += 2 * len; | |
| 933 | 4004 | memcpy(ptr1, tmp, len * 3 * sizeof(*ptr1)); | |
| 934 | } | ||
| 935 | } | ||
| 936 | |||
| 937 | #define ISQRT2 FIXR(0.70710678118654752440) | ||
| 938 | |||
| 939 | 2455 | static void compute_stereo(MPADecodeContext *s, GranuleDef *g0, GranuleDef *g1) | |
| 940 | { | ||
| 941 | int i, j, k, l; | ||
| 942 | int sf_max, sf, len, non_zero_found; | ||
| 943 | INTFLOAT *tab0, *tab1, v1, v2; | ||
| 944 | const INTFLOAT (*is_tab)[16]; | ||
| 945 | SUINTFLOAT tmp0, tmp1; | ||
| 946 | int non_zero_found_short[3]; | ||
| 947 | |||
| 948 | /* intensity stereo */ | ||
| 949 |
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|
2455 | if (s->mode_ext & MODE_EXT_I_STEREO) { |
| 950 |
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|
1 | if (!s->lsf) { |
| 951 | ✗ | is_tab = is_table; | |
| 952 | ✗ | sf_max = 7; | |
| 953 | } else { | ||
| 954 | 1 | is_tab = is_table_lsf[g1->scalefac_compress & 1]; | |
| 955 | 1 | sf_max = 16; | |
| 956 | } | ||
| 957 | |||
| 958 | 1 | tab0 = g0->sb_hybrid + 576; | |
| 959 | 1 | tab1 = g1->sb_hybrid + 576; | |
| 960 | |||
| 961 | 1 | non_zero_found_short[0] = 0; | |
| 962 | 1 | non_zero_found_short[1] = 0; | |
| 963 | 1 | non_zero_found_short[2] = 0; | |
| 964 | 1 | k = (13 - g1->short_start) * 3 + g1->long_end - 3; | |
| 965 |
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|
1 | for (i = 12; i >= g1->short_start; i--) { |
| 966 | /* for last band, use previous scale factor */ | ||
| 967 | ✗ | if (i != 11) | |
| 968 | ✗ | k -= 3; | |
| 969 | ✗ | len = ff_band_size_short[s->sample_rate_index][i]; | |
| 970 | ✗ | for (l = 2; l >= 0; l--) { | |
| 971 | ✗ | tab0 -= len; | |
| 972 | ✗ | tab1 -= len; | |
| 973 | ✗ | if (!non_zero_found_short[l]) { | |
| 974 | /* test if non zero band. if so, stop doing i-stereo */ | ||
| 975 | ✗ | for (j = 0; j < len; j++) { | |
| 976 | ✗ | if (tab1[j] != 0) { | |
| 977 | ✗ | non_zero_found_short[l] = 1; | |
| 978 | ✗ | goto found1; | |
| 979 | } | ||
| 980 | } | ||
| 981 | ✗ | sf = g1->scale_factors[k + l]; | |
| 982 | ✗ | if (sf >= sf_max) | |
| 983 | ✗ | goto found1; | |
| 984 | |||
| 985 | ✗ | v1 = is_tab[0][sf]; | |
| 986 | ✗ | v2 = is_tab[1][sf]; | |
| 987 | ✗ | for (j = 0; j < len; j++) { | |
| 988 | ✗ | tmp0 = tab0[j]; | |
| 989 | ✗ | tab0[j] = MULLx(tmp0, v1, FRAC_BITS); | |
| 990 | ✗ | tab1[j] = MULLx(tmp0, v2, FRAC_BITS); | |
| 991 | } | ||
| 992 | } else { | ||
| 993 | ✗ | found1: | |
| 994 | ✗ | if (s->mode_ext & MODE_EXT_MS_STEREO) { | |
| 995 | /* lower part of the spectrum : do ms stereo | ||
| 996 | if enabled */ | ||
| 997 | ✗ | for (j = 0; j < len; j++) { | |
| 998 | ✗ | tmp0 = tab0[j]; | |
| 999 | ✗ | tmp1 = tab1[j]; | |
| 1000 | ✗ | tab0[j] = MULLx(tmp0 + tmp1, ISQRT2, FRAC_BITS); | |
| 1001 | ✗ | tab1[j] = MULLx(tmp0 - tmp1, ISQRT2, FRAC_BITS); | |
| 1002 | } | ||
| 1003 | } | ||
| 1004 | } | ||
| 1005 | } | ||
| 1006 | } | ||
| 1007 | |||
| 1008 | 1 | non_zero_found = non_zero_found_short[0] | | |
| 1009 | 1 | non_zero_found_short[1] | | |
| 1010 | 1 | non_zero_found_short[2]; | |
| 1011 | |||
| 1012 |
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23 | for (i = g1->long_end - 1;i >= 0;i--) { |
| 1013 | 22 | len = ff_band_size_long[s->sample_rate_index][i]; | |
| 1014 | 22 | tab0 -= len; | |
| 1015 | 22 | tab1 -= len; | |
| 1016 | /* test if non zero band. if so, stop doing i-stereo */ | ||
| 1017 |
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22 | if (!non_zero_found) { |
| 1018 |
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598 | for (j = 0; j < len; j++) { |
| 1019 |
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|
576 | if (tab1[j] != 0) { |
| 1020 | ✗ | non_zero_found = 1; | |
| 1021 | ✗ | goto found2; | |
| 1022 | } | ||
| 1023 | } | ||
| 1024 | /* for last band, use previous scale factor */ | ||
| 1025 |
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22 | k = (i == 21) ? 20 : i; |
| 1026 | 22 | sf = g1->scale_factors[k]; | |
| 1027 |
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|
22 | if (sf >= sf_max) |
| 1028 | ✗ | goto found2; | |
| 1029 | 22 | v1 = is_tab[0][sf]; | |
| 1030 | 22 | v2 = is_tab[1][sf]; | |
| 1031 |
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|
598 | for (j = 0; j < len; j++) { |
| 1032 | 576 | tmp0 = tab0[j]; | |
| 1033 | 576 | tab0[j] = MULLx(tmp0, v1, FRAC_BITS); | |
| 1034 | 576 | tab1[j] = MULLx(tmp0, v2, FRAC_BITS); | |
| 1035 | } | ||
| 1036 | } else { | ||
| 1037 | ✗ | found2: | |
| 1038 | ✗ | if (s->mode_ext & MODE_EXT_MS_STEREO) { | |
| 1039 | /* lower part of the spectrum : do ms stereo | ||
| 1040 | if enabled */ | ||
| 1041 | ✗ | for (j = 0; j < len; j++) { | |
| 1042 | ✗ | tmp0 = tab0[j]; | |
| 1043 | ✗ | tmp1 = tab1[j]; | |
| 1044 | ✗ | tab0[j] = MULLx(tmp0 + tmp1, ISQRT2, FRAC_BITS); | |
| 1045 | ✗ | tab1[j] = MULLx(tmp0 - tmp1, ISQRT2, FRAC_BITS); | |
| 1046 | } | ||
| 1047 | } | ||
| 1048 | } | ||
| 1049 | } | ||
| 1050 |
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2454 | } else if (s->mode_ext & MODE_EXT_MS_STEREO) { |
| 1051 | /* ms stereo ONLY */ | ||
| 1052 | /* NOTE: the 1/sqrt(2) normalization factor is included in the | ||
| 1053 | global gain */ | ||
| 1054 | #if USE_FLOATS | ||
| 1055 | 58 | s->butterflies_float(g0->sb_hybrid, g1->sb_hybrid, 576); | |
| 1056 | #else | ||
| 1057 | 2176 | tab0 = g0->sb_hybrid; | |
| 1058 | 2176 | tab1 = g1->sb_hybrid; | |
| 1059 |
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1255552 | for (i = 0; i < 576; i++) { |
| 1060 | 1253376 | tmp0 = tab0[i]; | |
| 1061 | 1253376 | tmp1 = tab1[i]; | |
| 1062 | 1253376 | tab0[i] = tmp0 + tmp1; | |
| 1063 | 1253376 | tab1[i] = tmp0 - tmp1; | |
| 1064 | } | ||
| 1065 | #endif | ||
| 1066 | } | ||
| 1067 | 2455 | } | |
| 1068 | |||
| 1069 | #if USE_FLOATS | ||
| 1070 | #if HAVE_MIPSFPU | ||
| 1071 | # include "mips/compute_antialias_float.h" | ||
| 1072 | #endif /* HAVE_MIPSFPU */ | ||
| 1073 | #else | ||
| 1074 | #if HAVE_MIPSDSP | ||
| 1075 | # include "mips/compute_antialias_fixed.h" | ||
| 1076 | #endif /* HAVE_MIPSDSP */ | ||
| 1077 | #endif /* USE_FLOATS */ | ||
| 1078 | |||
| 1079 | #ifndef compute_antialias | ||
| 1080 | #if USE_FLOATS | ||
| 1081 | #define AA(j) do { \ | ||
| 1082 | float tmp0 = ptr[-1-j]; \ | ||
| 1083 | float tmp1 = ptr[ j]; \ | ||
| 1084 | ptr[-1-j] = tmp0 * csa_table[j][0] - tmp1 * csa_table[j][1]; \ | ||
| 1085 | ptr[ j] = tmp0 * csa_table[j][1] + tmp1 * csa_table[j][0]; \ | ||
| 1086 | } while (0) | ||
| 1087 | #else | ||
| 1088 | #define AA(j) do { \ | ||
| 1089 | SUINT tmp0 = ptr[-1-j]; \ | ||
| 1090 | SUINT tmp1 = ptr[ j]; \ | ||
| 1091 | SUINT tmp2 = MULH(tmp0 + tmp1, csa_table[j][0]); \ | ||
| 1092 | ptr[-1-j] = 4 * (tmp2 - MULH(tmp1, csa_table[j][2])); \ | ||
| 1093 | ptr[ j] = 4 * (tmp2 + MULH(tmp0, csa_table[j][3])); \ | ||
| 1094 | } while (0) | ||
| 1095 | #endif | ||
| 1096 | |||
| 1097 | 8138 | static void compute_antialias(MPADecodeContext *s, GranuleDef *g) | |
| 1098 | { | ||
| 1099 | INTFLOAT *ptr; | ||
| 1100 | int n, i; | ||
| 1101 | |||
| 1102 | /* we antialias only "long" bands */ | ||
| 1103 |
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8138 | if (g->block_type == 2) { |
| 1104 |
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|
311 | if (!g->switch_point) |
| 1105 | 298 | return; | |
| 1106 | /* XXX: check this for 8000Hz case */ | ||
| 1107 | 13 | n = 1; | |
| 1108 | } else { | ||
| 1109 | 7827 | n = SBLIMIT - 1; | |
| 1110 | } | ||
| 1111 | |||
| 1112 | 7840 | ptr = g->sb_hybrid + 18; | |
| 1113 |
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250490 | for (i = n; i > 0; i--) { |
| 1114 | 242650 | AA(0); | |
| 1115 | 242650 | AA(1); | |
| 1116 | 242650 | AA(2); | |
| 1117 | 242650 | AA(3); | |
| 1118 | 242650 | AA(4); | |
| 1119 | 242650 | AA(5); | |
| 1120 | 242650 | AA(6); | |
| 1121 | 242650 | AA(7); | |
| 1122 | |||
| 1123 | 242650 | ptr += 18; | |
| 1124 | } | ||
| 1125 | } | ||
| 1126 | #endif /* compute_antialias */ | ||
| 1127 | |||
| 1128 | 8146 | static void compute_imdct(MPADecodeContext *s, GranuleDef *g, | |
| 1129 | INTFLOAT *sb_samples, INTFLOAT *mdct_buf) | ||
| 1130 | { | ||
| 1131 | INTFLOAT *win, *out_ptr, *ptr, *buf, *ptr1; | ||
| 1132 | INTFLOAT out2[12]; | ||
| 1133 | int i, j, mdct_long_end, sblimit; | ||
| 1134 | |||
| 1135 | /* find last non zero block */ | ||
| 1136 | 8146 | ptr = g->sb_hybrid + 576; | |
| 1137 | 8146 | ptr1 = g->sb_hybrid + 2 * 18; | |
| 1138 |
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313889 | while (ptr >= ptr1) { |
| 1139 | int32_t *p; | ||
| 1140 | 313691 | ptr -= 6; | |
| 1141 | 313691 | p = (int32_t*)ptr; | |
| 1142 |
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|
313691 | if (p[0] | p[1] | p[2] | p[3] | p[4] | p[5]) |
| 1143 | 7948 | break; | |
| 1144 | } | ||
| 1145 | 8146 | sblimit = ((ptr - g->sb_hybrid) / 18) + 1; | |
| 1146 | |||
| 1147 |
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8146 | if (g->block_type == 2) { |
| 1148 | /* XXX: check for 8000 Hz */ | ||
| 1149 |
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|
313 | if (g->switch_point) |
| 1150 | 13 | mdct_long_end = 2; | |
| 1151 | else | ||
| 1152 | 300 | mdct_long_end = 0; | |
| 1153 | } else { | ||
| 1154 | 7833 | mdct_long_end = sblimit; | |
| 1155 | } | ||
| 1156 | |||
| 1157 | 8146 | s->mpadsp.RENAME(imdct36_blocks)(sb_samples, mdct_buf, g->sb_hybrid, | |
| 1158 | 8146 | mdct_long_end, g->switch_point, | |
| 1159 | 8146 | g->block_type); | |
| 1160 | |||
| 1161 | 8146 | buf = mdct_buf + 4*18*(mdct_long_end >> 2) + (mdct_long_end & 3); | |
| 1162 | 8146 | ptr = g->sb_hybrid + 18 * mdct_long_end; | |
| 1163 | |||
| 1164 |
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|
14764 | for (j = mdct_long_end; j < sblimit; j++) { |
| 1165 | /* select frequency inversion */ | ||
| 1166 | 6618 | win = RENAME(ff_mdct_win)[2 + (4 & -(j & 1))]; | |
| 1167 | 6618 | out_ptr = sb_samples + j; | |
| 1168 | |||
| 1169 |
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46326 | for (i = 0; i < 6; i++) { |
| 1170 | 39708 | *out_ptr = buf[4*i]; | |
| 1171 | 39708 | out_ptr += SBLIMIT; | |
| 1172 | } | ||
| 1173 | 6618 | imdct12(out2, ptr + 0); | |
| 1174 |
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46326 | for (i = 0; i < 6; i++) { |
| 1175 | 39708 | *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*1)]; | |
| 1176 | 39708 | buf[4*(i + 6*2)] = MULH3(out2[i + 6], win[i + 6], 1); | |
| 1177 | 39708 | out_ptr += SBLIMIT; | |
| 1178 | } | ||
| 1179 | 6618 | imdct12(out2, ptr + 1); | |
| 1180 |
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46326 | for (i = 0; i < 6; i++) { |
| 1181 | 39708 | *out_ptr = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*2)]; | |
| 1182 | 39708 | buf[4*(i + 6*0)] = MULH3(out2[i + 6], win[i + 6], 1); | |
| 1183 | 39708 | out_ptr += SBLIMIT; | |
| 1184 | } | ||
| 1185 | 6618 | imdct12(out2, ptr + 2); | |
| 1186 |
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46326 | for (i = 0; i < 6; i++) { |
| 1187 | 39708 | buf[4*(i + 6*0)] = MULH3(out2[i ], win[i ], 1) + buf[4*(i + 6*0)]; | |
| 1188 | 39708 | buf[4*(i + 6*1)] = MULH3(out2[i + 6], win[i + 6], 1); | |
| 1189 | 39708 | buf[4*(i + 6*2)] = 0; | |
| 1190 | } | ||
| 1191 | 6618 | ptr += 18; | |
| 1192 |
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|
6618 | buf += (j&3) != 3 ? 1 : (4*18-3); |
| 1193 | } | ||
| 1194 | /* zero bands */ | ||
| 1195 |
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|
106315 | for (j = sblimit; j < SBLIMIT; j++) { |
| 1196 | /* overlap */ | ||
| 1197 | 98169 | out_ptr = sb_samples + j; | |
| 1198 |
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|
1865211 | for (i = 0; i < 18; i++) { |
| 1199 | 1767042 | *out_ptr = buf[4*i]; | |
| 1200 | 1767042 | buf[4*i] = 0; | |
| 1201 | 1767042 | out_ptr += SBLIMIT; | |
| 1202 | } | ||
| 1203 |
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|
98169 | buf += (j&3) != 3 ? 1 : (4*18-3); |
| 1204 | } | ||
| 1205 | 8146 | } | |
| 1206 | |||
| 1207 | /* main layer3 decoding function */ | ||
| 1208 | 2814 | static int mp_decode_layer3(MPADecodeContext *s) | |
| 1209 | { | ||
| 1210 | int nb_granules, main_data_begin; | ||
| 1211 | int gr, ch, blocksplit_flag, i, j, k, n, bits_pos; | ||
| 1212 | GranuleDef *g; | ||
| 1213 | int16_t exponents[576]; //FIXME try INTFLOAT | ||
| 1214 | int ret; | ||
| 1215 | |||
| 1216 | /* read side info */ | ||
| 1217 |
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|
2814 | if (s->lsf) { |
| 1218 |
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|
3 | ret = handle_crc(s, ((s->nb_channels == 1) ? 8*9 : 8*17)); |
| 1219 | 3 | main_data_begin = get_bits(&s->gb, 8); | |
| 1220 | 3 | skip_bits(&s->gb, s->nb_channels); | |
| 1221 | 3 | nb_granules = 1; | |
| 1222 | } else { | ||
| 1223 |
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|
2811 | ret = handle_crc(s, ((s->nb_channels == 1) ? 8*17 : 8*32)); |
| 1224 | 2811 | main_data_begin = get_bits(&s->gb, 9); | |
| 1225 |
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|
2811 | if (s->nb_channels == 2) |
| 1226 | 1260 | skip_bits(&s->gb, 3); | |
| 1227 | else | ||
| 1228 | 1551 | skip_bits(&s->gb, 5); | |
| 1229 | 2811 | nb_granules = 2; | |
| 1230 |
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|
6882 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1231 | 4071 | s->granules[ch][0].scfsi = 0;/* all scale factors are transmitted */ | |
| 1232 | 4071 | s->granules[ch][1].scfsi = get_bits(&s->gb, 4); | |
| 1233 | } | ||
| 1234 | } | ||
| 1235 |
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2814 | if (ret < 0) |
| 1236 | ✗ | return ret; | |
| 1237 | |||
| 1238 |
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|
8439 | for (gr = 0; gr < nb_granules; gr++) { |
| 1239 |
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|
13771 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1240 | ff_dlog(s->avctx, "gr=%d ch=%d: side_info\n", gr, ch); | ||
| 1241 | 8146 | g = &s->granules[ch][gr]; | |
| 1242 | 8146 | g->part2_3_length = get_bits(&s->gb, 12); | |
| 1243 | 8146 | g->big_values = get_bits(&s->gb, 9); | |
| 1244 |
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|
8146 | if (g->big_values > 288) { |
| 1245 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "big_values too big\n"); | |
| 1246 | ✗ | return AVERROR_INVALIDDATA; | |
| 1247 | } | ||
| 1248 | |||
| 1249 | 8146 | g->global_gain = get_bits(&s->gb, 8); | |
| 1250 | /* if MS stereo only is selected, we precompute the | ||
| 1251 | 1/sqrt(2) renormalization factor */ | ||
| 1252 |
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|
8146 | if ((s->mode_ext & (MODE_EXT_MS_STEREO | MODE_EXT_I_STEREO)) == |
| 1253 | MODE_EXT_MS_STEREO) | ||
| 1254 | 4468 | g->global_gain -= 2; | |
| 1255 |
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|
8146 | if (s->lsf) |
| 1256 | 4 | g->scalefac_compress = get_bits(&s->gb, 9); | |
| 1257 | else | ||
| 1258 | 8142 | g->scalefac_compress = get_bits(&s->gb, 4); | |
| 1259 | 8146 | blocksplit_flag = get_bits1(&s->gb); | |
| 1260 |
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|
8146 | if (blocksplit_flag) { |
| 1261 | 861 | g->block_type = get_bits(&s->gb, 2); | |
| 1262 |
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|
861 | if (g->block_type == 0) { |
| 1263 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "invalid block type\n"); | |
| 1264 | ✗ | return AVERROR_INVALIDDATA; | |
| 1265 | } | ||
| 1266 | 861 | g->switch_point = get_bits1(&s->gb); | |
| 1267 |
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|
2583 | for (i = 0; i < 2; i++) |
| 1268 | 1722 | g->table_select[i] = get_bits(&s->gb, 5); | |
| 1269 |
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|
3444 | for (i = 0; i < 3; i++) |
| 1270 | 2583 | g->subblock_gain[i] = get_bits(&s->gb, 3); | |
| 1271 | 861 | init_short_region(s, g); | |
| 1272 | } else { | ||
| 1273 | int region_address1, region_address2; | ||
| 1274 | 7285 | g->block_type = 0; | |
| 1275 | 7285 | g->switch_point = 0; | |
| 1276 |
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|
29140 | for (i = 0; i < 3; i++) |
| 1277 | 21855 | g->table_select[i] = get_bits(&s->gb, 5); | |
| 1278 | /* compute huffman coded region sizes */ | ||
| 1279 | 7285 | region_address1 = get_bits(&s->gb, 4); | |
| 1280 | 7285 | region_address2 = get_bits(&s->gb, 3); | |
| 1281 | ff_dlog(s->avctx, "region1=%d region2=%d\n", | ||
| 1282 | region_address1, region_address2); | ||
| 1283 | 7285 | init_long_region(s, g, region_address1, region_address2); | |
| 1284 | } | ||
| 1285 | 8146 | region_offset2size(g); | |
| 1286 | 8146 | compute_band_indexes(s, g); | |
| 1287 | |||
| 1288 | 8146 | g->preflag = 0; | |
| 1289 |
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|
8146 | if (!s->lsf) |
| 1290 | 8142 | g->preflag = get_bits1(&s->gb); | |
| 1291 | 8146 | g->scalefac_scale = get_bits1(&s->gb); | |
| 1292 | 8146 | g->count1table_select = get_bits1(&s->gb); | |
| 1293 | ff_dlog(s->avctx, "block_type=%d switch_point=%d\n", | ||
| 1294 | g->block_type, g->switch_point); | ||
| 1295 | } | ||
| 1296 | } | ||
| 1297 | |||
| 1298 |
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|
2814 | if (!s->adu_mode) { |
| 1299 | int skip; | ||
| 1300 | 2814 | const uint8_t *ptr = s->gb.buffer + (get_bits_count(&s->gb) >> 3); | |
| 1301 | 2814 | s->extrasize = av_clip((get_bits_left(&s->gb) >> 3) - s->extrasize, 0, | |
| 1302 | 2814 | FFMAX(0, LAST_BUF_SIZE - s->last_buf_size)); | |
| 1303 | av_assert1((get_bits_count(&s->gb) & 7) == 0); | ||
| 1304 | /* now we get bits from the main_data_begin offset */ | ||
| 1305 | ff_dlog(s->avctx, "seekback:%d, lastbuf:%d\n", | ||
| 1306 | main_data_begin, s->last_buf_size); | ||
| 1307 | |||
| 1308 | 2814 | memcpy(s->last_buf + s->last_buf_size, ptr, s->extrasize); | |
| 1309 | 2814 | s->in_gb = s->gb; | |
| 1310 | 2814 | init_get_bits(&s->gb, s->last_buf, (s->last_buf_size + s->extrasize) * 8); | |
| 1311 | 2814 | s->last_buf_size <<= 3; | |
| 1312 |
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|
2822 | for (gr = 0; gr < nb_granules && (s->last_buf_size >> 3) < main_data_begin; gr++) { |
| 1313 |
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16 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1314 | 8 | g = &s->granules[ch][gr]; | |
| 1315 | 8 | s->last_buf_size += g->part2_3_length; | |
| 1316 | 8 | memset(g->sb_hybrid, 0, sizeof(g->sb_hybrid)); | |
| 1317 | 8 | compute_imdct(s, g, &s->sb_samples[ch][18 * gr][0], s->mdct_buf[ch]); | |
| 1318 | } | ||
| 1319 | } | ||
| 1320 | 2814 | skip = s->last_buf_size - 8 * main_data_begin; | |
| 1321 |
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|
2814 | if (skip >= s->gb.size_in_bits - s->extrasize * 8 && s->in_gb.buffer) { |
| 1322 | 156 | skip_bits_long(&s->in_gb, skip - s->gb.size_in_bits + s->extrasize * 8); | |
| 1323 | 156 | s->gb = s->in_gb; | |
| 1324 | 156 | s->in_gb.buffer = NULL; | |
| 1325 | 156 | s->extrasize = 0; | |
| 1326 | } else { | ||
| 1327 | 2658 | skip_bits_long(&s->gb, skip); | |
| 1328 | } | ||
| 1329 | } else { | ||
| 1330 | ✗ | gr = 0; | |
| 1331 | ✗ | s->extrasize = 0; | |
| 1332 | } | ||
| 1333 | |||
| 1334 |
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|
8431 | for (; gr < nb_granules; gr++) { |
| 1335 |
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13755 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1336 | 8138 | g = &s->granules[ch][gr]; | |
| 1337 | 8138 | bits_pos = get_bits_count(&s->gb); | |
| 1338 | |||
| 1339 |
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|
8138 | if (!s->lsf) { |
| 1340 | uint8_t *sc; | ||
| 1341 | int slen, slen1, slen2; | ||
| 1342 | |||
| 1343 | /* MPEG-1 scale factors */ | ||
| 1344 | 8134 | slen1 = ff_slen_table[0][g->scalefac_compress]; | |
| 1345 | 8134 | slen2 = ff_slen_table[1][g->scalefac_compress]; | |
| 1346 | ff_dlog(s->avctx, "slen1=%d slen2=%d\n", slen1, slen2); | ||
| 1347 |
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|
8134 | if (g->block_type == 2) { |
| 1348 |
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|
311 | n = g->switch_point ? 17 : 18; |
| 1349 | 311 | j = 0; | |
| 1350 |
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|
311 | if (slen1) { |
| 1351 |
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851 | for (i = 0; i < n; i++) |
| 1352 | 806 | g->scale_factors[j++] = get_bits(&s->gb, slen1); | |
| 1353 | } else { | ||
| 1354 |
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5045 | for (i = 0; i < n; i++) |
| 1355 | 4779 | g->scale_factors[j++] = 0; | |
| 1356 | } | ||
| 1357 |
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|
311 | if (slen2) { |
| 1358 |
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4921 | for (i = 0; i < 18; i++) |
| 1359 | 4662 | g->scale_factors[j++] = get_bits(&s->gb, slen2); | |
| 1360 |
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1036 | for (i = 0; i < 3; i++) |
| 1361 | 777 | g->scale_factors[j++] = 0; | |
| 1362 | } else { | ||
| 1363 |
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1144 | for (i = 0; i < 21; i++) |
| 1364 | 1092 | g->scale_factors[j++] = 0; | |
| 1365 | } | ||
| 1366 | } else { | ||
| 1367 | 7823 | sc = s->granules[ch][0].scale_factors; | |
| 1368 | 7823 | j = 0; | |
| 1369 |
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39115 | for (k = 0; k < 4; k++) { |
| 1370 |
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|
31292 | n = k == 0 ? 6 : 5; |
| 1371 |
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|
31292 | if ((g->scfsi & (0x8 >> k)) == 0) { |
| 1372 |
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|
26922 | slen = (k < 2) ? slen1 : slen2; |
| 1373 |
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|
26922 | if (slen) { |
| 1374 |
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|
88978 | for (i = 0; i < n; i++) |
| 1375 | 74592 | g->scale_factors[j++] = get_bits(&s->gb, slen); | |
| 1376 | } else { | ||
| 1377 |
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78962 | for (i = 0; i < n; i++) |
| 1378 | 66426 | g->scale_factors[j++] = 0; | |
| 1379 | } | ||
| 1380 | } else { | ||
| 1381 | /* simply copy from last granule */ | ||
| 1382 |
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27635 | for (i = 0; i < n; i++) { |
| 1383 | 23265 | g->scale_factors[j] = sc[j]; | |
| 1384 | 23265 | j++; | |
| 1385 | } | ||
| 1386 | } | ||
| 1387 | } | ||
| 1388 | 7823 | g->scale_factors[j++] = 0; | |
| 1389 | } | ||
| 1390 | } else { | ||
| 1391 | int tindex, tindex2, slen[4], sl, sf; | ||
| 1392 | |||
| 1393 | /* LSF scale factors */ | ||
| 1394 |
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4 | if (g->block_type == 2) |
| 1395 | ✗ | tindex = g->switch_point ? 2 : 1; | |
| 1396 | else | ||
| 1397 | 4 | tindex = 0; | |
| 1398 | |||
| 1399 | 4 | sf = g->scalefac_compress; | |
| 1400 |
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4 | if ((s->mode_ext & MODE_EXT_I_STEREO) && ch == 1) { |
| 1401 | /* intensity stereo case */ | ||
| 1402 | 1 | sf >>= 1; | |
| 1403 |
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1 | if (sf < 180) { |
| 1404 | 1 | lsf_sf_expand(slen, sf, 6, 6, 0); | |
| 1405 | 1 | tindex2 = 3; | |
| 1406 | ✗ | } else if (sf < 244) { | |
| 1407 | ✗ | lsf_sf_expand(slen, sf - 180, 4, 4, 0); | |
| 1408 | ✗ | tindex2 = 4; | |
| 1409 | } else { | ||
| 1410 | ✗ | lsf_sf_expand(slen, sf - 244, 3, 0, 0); | |
| 1411 | ✗ | tindex2 = 5; | |
| 1412 | } | ||
| 1413 | } else { | ||
| 1414 | /* normal case */ | ||
| 1415 |
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3 | if (sf < 400) { |
| 1416 | 1 | lsf_sf_expand(slen, sf, 5, 4, 4); | |
| 1417 | 1 | tindex2 = 0; | |
| 1418 |
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|
2 | } else if (sf < 500) { |
| 1419 | 2 | lsf_sf_expand(slen, sf - 400, 5, 4, 0); | |
| 1420 | 2 | tindex2 = 1; | |
| 1421 | } else { | ||
| 1422 | ✗ | lsf_sf_expand(slen, sf - 500, 3, 0, 0); | |
| 1423 | ✗ | tindex2 = 2; | |
| 1424 | ✗ | g->preflag = 1; | |
| 1425 | } | ||
| 1426 | } | ||
| 1427 | |||
| 1428 | 4 | j = 0; | |
| 1429 |
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20 | for (k = 0; k < 4; k++) { |
| 1430 | 16 | n = ff_lsf_nsf_table[tindex2][tindex][k]; | |
| 1431 | 16 | sl = slen[k]; | |
| 1432 |
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16 | if (sl) { |
| 1433 |
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|
45 | for (i = 0; i < n; i++) |
| 1434 | 39 | g->scale_factors[j++] = get_bits(&s->gb, sl); | |
| 1435 | } else { | ||
| 1436 |
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55 | for (i = 0; i < n; i++) |
| 1437 | 45 | g->scale_factors[j++] = 0; | |
| 1438 | } | ||
| 1439 | } | ||
| 1440 | /* XXX: should compute exact size */ | ||
| 1441 |
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|
80 | for (; j < 40; j++) |
| 1442 | 76 | g->scale_factors[j] = 0; | |
| 1443 | } | ||
| 1444 | |||
| 1445 | 8138 | exponents_from_scale_factors(s, g, exponents); | |
| 1446 | |||
| 1447 | /* read Huffman coded residue */ | ||
| 1448 | 8138 | huffman_decode(s, g, exponents, bits_pos + g->part2_3_length); | |
| 1449 | } /* ch */ | ||
| 1450 | |||
| 1451 |
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5617 | if (s->mode == MPA_JSTEREO) |
| 1452 | 2455 | compute_stereo(s, &s->granules[0][gr], &s->granules[1][gr]); | |
| 1453 | |||
| 1454 |
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13755 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1455 | 8138 | g = &s->granules[ch][gr]; | |
| 1456 | |||
| 1457 | 8138 | reorder_block(s, g); | |
| 1458 | 8138 | compute_antialias(s, g); | |
| 1459 | 8138 | compute_imdct(s, g, &s->sb_samples[ch][18 * gr][0], s->mdct_buf[ch]); | |
| 1460 | } | ||
| 1461 | } /* gr */ | ||
| 1462 |
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2814 | if (get_bits_count(&s->gb) < 0) |
| 1463 | ✗ | skip_bits_long(&s->gb, -get_bits_count(&s->gb)); | |
| 1464 | 2814 | return nb_granules * 18; | |
| 1465 | } | ||
| 1466 | |||
| 1467 | 10155 | static int mp_decode_frame(MPADecodeContext *s, OUT_INT **samples, | |
| 1468 | const uint8_t *buf, int buf_size) | ||
| 1469 | { | ||
| 1470 | int i, nb_frames, ch, ret; | ||
| 1471 | OUT_INT *samples_ptr; | ||
| 1472 | |||
| 1473 | 10155 | init_get_bits(&s->gb, buf + HEADER_SIZE, (buf_size - HEADER_SIZE) * 8); | |
| 1474 |
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10155 | if (s->error_protection) |
| 1475 | 206 | s->crc = get_bits(&s->gb, 16); | |
| 1476 | |||
| 1477 |
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10155 | switch(s->layer) { |
| 1478 | ✗ | case 1: | |
| 1479 | ✗ | s->avctx->frame_size = 384; | |
| 1480 | ✗ | nb_frames = mp_decode_layer1(s); | |
| 1481 | ✗ | break; | |
| 1482 | 7341 | case 2: | |
| 1483 | 7341 | s->avctx->frame_size = 1152; | |
| 1484 | 7341 | nb_frames = mp_decode_layer2(s); | |
| 1485 | 7341 | break; | |
| 1486 | 2814 | case 3: | |
| 1487 |
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|
2814 | s->avctx->frame_size = s->lsf ? 576 : 1152; |
| 1488 | 2814 | default: | |
| 1489 | 2814 | nb_frames = mp_decode_layer3(s); | |
| 1490 | |||
| 1491 | 2814 | s->last_buf_size=0; | |
| 1492 |
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2814 | if (s->in_gb.buffer) { |
| 1493 | 1719 | align_get_bits(&s->gb); | |
| 1494 | 1719 | i = (get_bits_left(&s->gb) >> 3) - s->extrasize; | |
| 1495 |
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1719 | if (i >= 0 && i <= BACKSTEP_SIZE) { |
| 1496 | 1719 | memmove(s->last_buf, s->gb.buffer + (get_bits_count(&s->gb) >> 3), i); | |
| 1497 | 1719 | s->last_buf_size=i; | |
| 1498 | } else | ||
| 1499 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "invalid old backstep %d\n", i); | |
| 1500 | 1719 | s->gb = s->in_gb; | |
| 1501 | 1719 | s->in_gb.buffer = NULL; | |
| 1502 | 1719 | s->extrasize = 0; | |
| 1503 | } | ||
| 1504 | |||
| 1505 | 2814 | align_get_bits(&s->gb); | |
| 1506 | av_assert1((get_bits_count(&s->gb) & 7) == 0); | ||
| 1507 | 2814 | i = (get_bits_left(&s->gb) >> 3) - s->extrasize; | |
| 1508 |
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2814 | if (i < 0 || i > BACKSTEP_SIZE || nb_frames < 0) { |
| 1509 |
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|
230 | if (i < 0) |
| 1510 | ✗ | av_log(s->avctx, AV_LOG_ERROR, "invalid new backstep %d\n", i); | |
| 1511 | 230 | i = FFMIN(BACKSTEP_SIZE, buf_size - HEADER_SIZE); | |
| 1512 | } | ||
| 1513 | av_assert1(i <= buf_size - HEADER_SIZE && i >= 0); | ||
| 1514 | 2814 | memcpy(s->last_buf + s->last_buf_size, s->gb.buffer + buf_size - HEADER_SIZE - i, i); | |
| 1515 | 2814 | s->last_buf_size += i; | |
| 1516 | } | ||
| 1517 | |||
| 1518 |
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|
10155 | if(nb_frames < 0) |
| 1519 | ✗ | return nb_frames; | |
| 1520 | |||
| 1521 | /* get output buffer */ | ||
| 1522 |
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10155 | if (!samples) { |
| 1523 |
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10155 | av_assert0(s->frame); |
| 1524 | 10155 | s->frame->nb_samples = s->avctx->frame_size; | |
| 1525 |
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|
10155 | if ((ret = ff_get_buffer(s->avctx, s->frame, 0)) < 0) |
| 1526 | ✗ | return ret; | |
| 1527 | 10155 | samples = (OUT_INT **)s->frame->extended_data; | |
| 1528 | } | ||
| 1529 | |||
| 1530 | /* apply the synthesis filter */ | ||
| 1531 |
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|
22310 | for (ch = 0; ch < s->nb_channels; ch++) { |
| 1532 | int sample_stride; | ||
| 1533 |
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|
12155 | if (s->avctx->sample_fmt == OUT_FMT_P) { |
| 1534 | 12155 | samples_ptr = samples[ch]; | |
| 1535 | 12155 | sample_stride = 1; | |
| 1536 | } else { | ||
| 1537 | ✗ | samples_ptr = samples[0] + ch; | |
| 1538 | ✗ | sample_stride = s->nb_channels; | |
| 1539 | } | ||
| 1540 |
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449663 | for (i = 0; i < nb_frames; i++) { |
| 1541 | 437508 | RENAME(ff_mpa_synth_filter)(&s->mpadsp, s->synth_buf[ch], | |
| 1542 | &(s->synth_buf_offset[ch]), | ||
| 1543 | RENAME(ff_mpa_synth_window), | ||
| 1544 | &s->dither_state, samples_ptr, | ||
| 1545 | 437508 | sample_stride, s->sb_samples[ch][i]); | |
| 1546 | 437508 | samples_ptr += 32 * sample_stride; | |
| 1547 | } | ||
| 1548 | } | ||
| 1549 | |||
| 1550 | 10155 | return nb_frames * 32 * sizeof(OUT_INT) * s->nb_channels; | |
| 1551 | } | ||
| 1552 | |||
| 1553 | 10158 | static int decode_frame(AVCodecContext *avctx, AVFrame *frame, | |
| 1554 | int *got_frame_ptr, AVPacket *avpkt) | ||
| 1555 | { | ||
| 1556 | 10158 | const uint8_t *buf = avpkt->data; | |
| 1557 | 10158 | int buf_size = avpkt->size; | |
| 1558 | 10158 | MPADecodeContext *s = avctx->priv_data; | |
| 1559 | uint32_t header; | ||
| 1560 | int ret; | ||
| 1561 | |||
| 1562 | 10158 | int skipped = 0; | |
| 1563 |
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10158 | while(buf_size && !*buf){ |
| 1564 | ✗ | buf++; | |
| 1565 | ✗ | buf_size--; | |
| 1566 | ✗ | skipped++; | |
| 1567 | } | ||
| 1568 | |||
| 1569 |
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10158 | if (buf_size < HEADER_SIZE) |
| 1570 | ✗ | return AVERROR_INVALIDDATA; | |
| 1571 | |||
| 1572 | 10158 | header = AV_RB32(buf); | |
| 1573 |
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10158 | if (header >> 8 == AV_RB32("TAG") >> 8) { |
| 1574 | ✗ | av_log(avctx, AV_LOG_DEBUG, "discarding ID3 tag\n"); | |
| 1575 | ✗ | return buf_size + skipped; | |
| 1576 | } | ||
| 1577 | 10158 | ret = avpriv_mpegaudio_decode_header((MPADecodeHeader *)s, header); | |
| 1578 |
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10158 | if (ret < 0) { |
| 1579 | 3 | av_log(avctx, AV_LOG_ERROR, "Header missing\n"); | |
| 1580 | 3 | return AVERROR_INVALIDDATA; | |
| 1581 |
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10155 | } else if (ret == 1) { |
| 1582 | /* free format: prepare to compute frame size */ | ||
| 1583 | ✗ | s->frame_size = -1; | |
| 1584 | ✗ | return AVERROR_INVALIDDATA; | |
| 1585 | } | ||
| 1586 | /* update codec info */ | ||
| 1587 | 10155 | av_channel_layout_uninit(&avctx->ch_layout); | |
| 1588 |
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|
10155 | avctx->ch_layout = s->nb_channels == 1 ? (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO : |
| 1589 | (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; | ||
| 1590 |
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10155 | if (!avctx->bit_rate) |
| 1591 | 6 | avctx->bit_rate = s->bit_rate; | |
| 1592 | |||
| 1593 |
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10155 | if (s->frame_size <= 0) { |
| 1594 | ✗ | av_log(avctx, AV_LOG_ERROR, "incomplete frame\n"); | |
| 1595 | ✗ | return AVERROR_INVALIDDATA; | |
| 1596 |
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10155 | } else if (s->frame_size < buf_size) { |
| 1597 | 1 | av_log(avctx, AV_LOG_DEBUG, "incorrect frame size - multiple frames in buffer?\n"); | |
| 1598 | 1 | buf_size= s->frame_size; | |
| 1599 | } | ||
| 1600 | |||
| 1601 | 10155 | s->frame = frame; | |
| 1602 | |||
| 1603 | 10155 | ret = mp_decode_frame(s, NULL, buf, buf_size); | |
| 1604 |
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10155 | if (ret >= 0) { |
| 1605 | 10155 | s->frame->nb_samples = avctx->frame_size; | |
| 1606 | 10155 | *got_frame_ptr = 1; | |
| 1607 | 10155 | avctx->sample_rate = s->sample_rate; | |
| 1608 | //FIXME maybe move the other codec info stuff from above here too | ||
| 1609 | } else { | ||
| 1610 | ✗ | av_log(avctx, AV_LOG_ERROR, "Error while decoding MPEG audio frame.\n"); | |
| 1611 | /* Only return an error if the bad frame makes up the whole packet or | ||
| 1612 | * the error is related to buffer management. | ||
| 1613 | * If there is more data in the packet, just consume the bad frame | ||
| 1614 | * instead of returning an error, which would discard the whole | ||
| 1615 | * packet. */ | ||
| 1616 | ✗ | *got_frame_ptr = 0; | |
| 1617 | ✗ | if (buf_size == avpkt->size || ret != AVERROR_INVALIDDATA) | |
| 1618 | ✗ | return ret; | |
| 1619 | } | ||
| 1620 | 10155 | s->frame_size = 0; | |
| 1621 | 10155 | return buf_size + skipped; | |
| 1622 | } | ||
| 1623 | |||
| 1624 | 1 | static void mp_flush(MPADecodeContext *ctx) | |
| 1625 | { | ||
| 1626 | 1 | memset(ctx->synth_buf, 0, sizeof(ctx->synth_buf)); | |
| 1627 | 1 | memset(ctx->mdct_buf, 0, sizeof(ctx->mdct_buf)); | |
| 1628 | 1 | ctx->last_buf_size = 0; | |
| 1629 | 1 | ctx->dither_state = 0; | |
| 1630 | 1 | } | |
| 1631 | |||
| 1632 | 1 | static void flush(AVCodecContext *avctx) | |
| 1633 | { | ||
| 1634 | 1 | mp_flush(avctx->priv_data); | |
| 1635 | 1 | } | |
| 1636 | |||
| 1637 | #if CONFIG_MP3ADU_DECODER || CONFIG_MP3ADUFLOAT_DECODER | ||
| 1638 | ✗ | static int decode_frame_adu(AVCodecContext *avctx, AVFrame *frame, | |
| 1639 | int *got_frame_ptr, AVPacket *avpkt) | ||
| 1640 | { | ||
| 1641 | ✗ | const uint8_t *buf = avpkt->data; | |
| 1642 | ✗ | int buf_size = avpkt->size; | |
| 1643 | ✗ | MPADecodeContext *s = avctx->priv_data; | |
| 1644 | uint32_t header; | ||
| 1645 | int len, ret; | ||
| 1646 | |||
| 1647 | ✗ | len = buf_size; | |
| 1648 | |||
| 1649 | // Discard too short frames | ||
| 1650 | ✗ | if (buf_size < HEADER_SIZE) { | |
| 1651 | ✗ | av_log(avctx, AV_LOG_ERROR, "Packet is too small\n"); | |
| 1652 | ✗ | return AVERROR_INVALIDDATA; | |
| 1653 | } | ||
| 1654 | |||
| 1655 | |||
| 1656 | ✗ | if (len > MPA_MAX_CODED_FRAME_SIZE) | |
| 1657 | ✗ | len = MPA_MAX_CODED_FRAME_SIZE; | |
| 1658 | |||
| 1659 | // Get header and restore sync word | ||
| 1660 | ✗ | header = AV_RB32(buf) | 0xffe00000; | |
| 1661 | |||
| 1662 | ✗ | ret = avpriv_mpegaudio_decode_header((MPADecodeHeader *)s, header); | |
| 1663 | ✗ | if (ret < 0) { | |
| 1664 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid frame header\n"); | |
| 1665 | ✗ | return ret; | |
| 1666 | } | ||
| 1667 | /* update codec info */ | ||
| 1668 | ✗ | avctx->sample_rate = s->sample_rate; | |
| 1669 | ✗ | av_channel_layout_uninit(&avctx->ch_layout); | |
| 1670 | ✗ | avctx->ch_layout = s->nb_channels == 1 ? (AVChannelLayout)AV_CHANNEL_LAYOUT_MONO : | |
| 1671 | (AVChannelLayout)AV_CHANNEL_LAYOUT_STEREO; | ||
| 1672 | ✗ | if (!avctx->bit_rate) | |
| 1673 | ✗ | avctx->bit_rate = s->bit_rate; | |
| 1674 | |||
| 1675 | ✗ | s->frame_size = len; | |
| 1676 | |||
| 1677 | ✗ | s->frame = frame; | |
| 1678 | |||
| 1679 | ✗ | ret = mp_decode_frame(s, NULL, buf, buf_size); | |
| 1680 | ✗ | if (ret < 0) { | |
| 1681 | ✗ | av_log(avctx, AV_LOG_ERROR, "Error while decoding MPEG audio frame.\n"); | |
| 1682 | ✗ | return ret; | |
| 1683 | } | ||
| 1684 | |||
| 1685 | ✗ | *got_frame_ptr = 1; | |
| 1686 | |||
| 1687 | ✗ | return buf_size; | |
| 1688 | } | ||
| 1689 | #endif /* CONFIG_MP3ADU_DECODER || CONFIG_MP3ADUFLOAT_DECODER */ | ||
| 1690 | |||
| 1691 | #if CONFIG_MP3ON4_DECODER || CONFIG_MP3ON4FLOAT_DECODER | ||
| 1692 | |||
| 1693 | /** | ||
| 1694 | * Context for MP3On4 decoder | ||
| 1695 | */ | ||
| 1696 | typedef struct MP3On4DecodeContext { | ||
| 1697 | int frames; ///< number of mp3 frames per block (number of mp3 decoder instances) | ||
| 1698 | int syncword; ///< syncword patch | ||
| 1699 | const uint8_t *coff; ///< channel offsets in output buffer | ||
| 1700 | MPADecodeContext *mp3decctx[5]; ///< MPADecodeContext for every decoder instance | ||
| 1701 | } MP3On4DecodeContext; | ||
| 1702 | |||
| 1703 | #include "mpeg4audio.h" | ||
| 1704 | |||
| 1705 | /* Next 3 arrays are indexed by channel config number (passed via codecdata) */ | ||
| 1706 | |||
| 1707 | /* number of mp3 decoder instances */ | ||
| 1708 | static const uint8_t mp3Frames[8] = { 0, 1, 1, 2, 3, 3, 4, 5 }; | ||
| 1709 | |||
| 1710 | /* offsets into output buffer, assume output order is FL FR C LFE BL BR SL SR */ | ||
| 1711 | static const uint8_t chan_offset[8][5] = { | ||
| 1712 | { 0 }, | ||
| 1713 | { 0 }, // C | ||
| 1714 | { 0 }, // FLR | ||
| 1715 | { 2, 0 }, // C FLR | ||
| 1716 | { 2, 0, 3 }, // C FLR BS | ||
| 1717 | { 2, 0, 3 }, // C FLR BLRS | ||
| 1718 | { 2, 0, 4, 3 }, // C FLR BLRS LFE | ||
| 1719 | { 2, 0, 6, 4, 3 }, // C FLR BLRS BLR LFE | ||
| 1720 | }; | ||
| 1721 | |||
| 1722 | /* mp3on4 channel layouts */ | ||
| 1723 | static const int16_t chan_layout[8] = { | ||
| 1724 | 0, | ||
| 1725 | AV_CH_LAYOUT_MONO, | ||
| 1726 | AV_CH_LAYOUT_STEREO, | ||
| 1727 | AV_CH_LAYOUT_SURROUND, | ||
| 1728 | AV_CH_LAYOUT_4POINT0, | ||
| 1729 | AV_CH_LAYOUT_5POINT0, | ||
| 1730 | AV_CH_LAYOUT_5POINT1, | ||
| 1731 | AV_CH_LAYOUT_7POINT1 | ||
| 1732 | }; | ||
| 1733 | |||
| 1734 | ✗ | static av_cold int decode_close_mp3on4(AVCodecContext * avctx) | |
| 1735 | { | ||
| 1736 | ✗ | MP3On4DecodeContext *s = avctx->priv_data; | |
| 1737 | int i; | ||
| 1738 | |||
| 1739 | ✗ | for (i = 0; i < s->frames; i++) | |
| 1740 | ✗ | av_freep(&s->mp3decctx[i]); | |
| 1741 | |||
| 1742 | ✗ | return 0; | |
| 1743 | } | ||
| 1744 | |||
| 1745 | |||
| 1746 | ✗ | static av_cold int decode_init_mp3on4(AVCodecContext * avctx) | |
| 1747 | { | ||
| 1748 | ✗ | MP3On4DecodeContext *s = avctx->priv_data; | |
| 1749 | MPEG4AudioConfig cfg; | ||
| 1750 | int i, ret; | ||
| 1751 | |||
| 1752 | ✗ | if ((avctx->extradata_size < 2) || !avctx->extradata) { | |
| 1753 | ✗ | av_log(avctx, AV_LOG_ERROR, "Codec extradata missing or too short.\n"); | |
| 1754 | ✗ | return AVERROR_INVALIDDATA; | |
| 1755 | } | ||
| 1756 | |||
| 1757 | ✗ | avpriv_mpeg4audio_get_config2(&cfg, avctx->extradata, | |
| 1758 | avctx->extradata_size, 1, avctx); | ||
| 1759 | ✗ | if (!cfg.chan_config || cfg.chan_config > 7) { | |
| 1760 | ✗ | av_log(avctx, AV_LOG_ERROR, "Invalid channel config number.\n"); | |
| 1761 | ✗ | return AVERROR_INVALIDDATA; | |
| 1762 | } | ||
| 1763 | ✗ | s->frames = mp3Frames[cfg.chan_config]; | |
| 1764 | ✗ | s->coff = chan_offset[cfg.chan_config]; | |
| 1765 | ✗ | av_channel_layout_uninit(&avctx->ch_layout); | |
| 1766 | ✗ | av_channel_layout_from_mask(&avctx->ch_layout, chan_layout[cfg.chan_config]); | |
| 1767 | |||
| 1768 | ✗ | if (cfg.sample_rate < 16000) | |
| 1769 | ✗ | s->syncword = 0xffe00000; | |
| 1770 | else | ||
| 1771 | ✗ | s->syncword = 0xfff00000; | |
| 1772 | |||
| 1773 | /* Init the first mp3 decoder in standard way, so that all tables get built | ||
| 1774 | * We replace avctx->priv_data with the context of the first decoder so that | ||
| 1775 | * decode_init() does not have to be changed. | ||
| 1776 | * Other decoders will be initialized here copying data from the first context | ||
| 1777 | */ | ||
| 1778 | // Allocate zeroed memory for the first decoder context | ||
| 1779 | ✗ | s->mp3decctx[0] = av_mallocz(sizeof(MPADecodeContext)); | |
| 1780 | ✗ | if (!s->mp3decctx[0]) | |
| 1781 | ✗ | return AVERROR(ENOMEM); | |
| 1782 | // Put decoder context in place to make init_decode() happy | ||
| 1783 | ✗ | avctx->priv_data = s->mp3decctx[0]; | |
| 1784 | ✗ | ret = decode_init(avctx); | |
| 1785 | // Restore mp3on4 context pointer | ||
| 1786 | ✗ | avctx->priv_data = s; | |
| 1787 | ✗ | if (ret < 0) | |
| 1788 | ✗ | return ret; | |
| 1789 | ✗ | s->mp3decctx[0]->adu_mode = 1; // Set adu mode | |
| 1790 | |||
| 1791 | /* Create a separate codec/context for each frame (first is already ok). | ||
| 1792 | * Each frame is 1 or 2 channels - up to 5 frames allowed | ||
| 1793 | */ | ||
| 1794 | ✗ | for (i = 1; i < s->frames; i++) { | |
| 1795 | ✗ | s->mp3decctx[i] = av_mallocz(sizeof(MPADecodeContext)); | |
| 1796 | ✗ | if (!s->mp3decctx[i]) | |
| 1797 | ✗ | return AVERROR(ENOMEM); | |
| 1798 | ✗ | s->mp3decctx[i]->adu_mode = 1; | |
| 1799 | ✗ | s->mp3decctx[i]->avctx = avctx; | |
| 1800 | ✗ | s->mp3decctx[i]->mpadsp = s->mp3decctx[0]->mpadsp; | |
| 1801 | ✗ | s->mp3decctx[i]->butterflies_float = s->mp3decctx[0]->butterflies_float; | |
| 1802 | } | ||
| 1803 | |||
| 1804 | ✗ | return 0; | |
| 1805 | } | ||
| 1806 | |||
| 1807 | |||
| 1808 | ✗ | static void flush_mp3on4(AVCodecContext *avctx) | |
| 1809 | { | ||
| 1810 | int i; | ||
| 1811 | ✗ | MP3On4DecodeContext *s = avctx->priv_data; | |
| 1812 | |||
| 1813 | ✗ | for (i = 0; i < s->frames; i++) | |
| 1814 | ✗ | mp_flush(s->mp3decctx[i]); | |
| 1815 | ✗ | } | |
| 1816 | |||
| 1817 | |||
| 1818 | ✗ | static int decode_frame_mp3on4(AVCodecContext *avctx, AVFrame *frame, | |
| 1819 | int *got_frame_ptr, AVPacket *avpkt) | ||
| 1820 | { | ||
| 1821 | ✗ | const uint8_t *buf = avpkt->data; | |
| 1822 | ✗ | int buf_size = avpkt->size; | |
| 1823 | ✗ | MP3On4DecodeContext *s = avctx->priv_data; | |
| 1824 | MPADecodeContext *m; | ||
| 1825 | ✗ | int fsize, len = buf_size, out_size = 0; | |
| 1826 | uint32_t header; | ||
| 1827 | OUT_INT **out_samples; | ||
| 1828 | OUT_INT *outptr[2]; | ||
| 1829 | int fr, ch, ret; | ||
| 1830 | |||
| 1831 | /* get output buffer */ | ||
| 1832 | ✗ | frame->nb_samples = MPA_FRAME_SIZE; | |
| 1833 | ✗ | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) | |
| 1834 | ✗ | return ret; | |
| 1835 | ✗ | out_samples = (OUT_INT **)frame->extended_data; | |
| 1836 | |||
| 1837 | // Discard too short frames | ||
| 1838 | ✗ | if (buf_size < HEADER_SIZE) | |
| 1839 | ✗ | return AVERROR_INVALIDDATA; | |
| 1840 | |||
| 1841 | ✗ | avctx->bit_rate = 0; | |
| 1842 | |||
| 1843 | ✗ | ch = 0; | |
| 1844 | ✗ | for (fr = 0; fr < s->frames; fr++) { | |
| 1845 | ✗ | fsize = AV_RB16(buf) >> 4; | |
| 1846 | ✗ | fsize = FFMIN3(fsize, len, MPA_MAX_CODED_FRAME_SIZE); | |
| 1847 | ✗ | m = s->mp3decctx[fr]; | |
| 1848 | av_assert1(m); | ||
| 1849 | |||
| 1850 | ✗ | if (fsize < HEADER_SIZE) { | |
| 1851 | ✗ | av_log(avctx, AV_LOG_ERROR, "Frame size smaller than header size\n"); | |
| 1852 | ✗ | return AVERROR_INVALIDDATA; | |
| 1853 | } | ||
| 1854 | ✗ | header = (AV_RB32(buf) & 0x000fffff) | s->syncword; // patch header | |
| 1855 | |||
| 1856 | ✗ | ret = avpriv_mpegaudio_decode_header((MPADecodeHeader *)m, header); | |
| 1857 | ✗ | if (ret < 0) { | |
| 1858 | ✗ | av_log(avctx, AV_LOG_ERROR, "Bad header, discard block\n"); | |
| 1859 | ✗ | return AVERROR_INVALIDDATA; | |
| 1860 | } | ||
| 1861 | |||
| 1862 | ✗ | if (ch + m->nb_channels > avctx->ch_layout.nb_channels || | |
| 1863 | ✗ | s->coff[fr] + m->nb_channels > avctx->ch_layout.nb_channels) { | |
| 1864 | ✗ | av_log(avctx, AV_LOG_ERROR, "frame channel count exceeds codec " | |
| 1865 | "channel count\n"); | ||
| 1866 | ✗ | return AVERROR_INVALIDDATA; | |
| 1867 | } | ||
| 1868 | ✗ | ch += m->nb_channels; | |
| 1869 | |||
| 1870 | ✗ | outptr[0] = out_samples[s->coff[fr]]; | |
| 1871 | ✗ | if (m->nb_channels > 1) | |
| 1872 | ✗ | outptr[1] = out_samples[s->coff[fr] + 1]; | |
| 1873 | |||
| 1874 | ✗ | if ((ret = mp_decode_frame(m, outptr, buf, fsize)) < 0) { | |
| 1875 | ✗ | av_log(avctx, AV_LOG_ERROR, "failed to decode channel %d\n", ch); | |
| 1876 | ✗ | memset(outptr[0], 0, MPA_FRAME_SIZE*sizeof(OUT_INT)); | |
| 1877 | ✗ | if (m->nb_channels > 1) | |
| 1878 | ✗ | memset(outptr[1], 0, MPA_FRAME_SIZE*sizeof(OUT_INT)); | |
| 1879 | ✗ | ret = m->nb_channels * MPA_FRAME_SIZE*sizeof(OUT_INT); | |
| 1880 | } | ||
| 1881 | |||
| 1882 | ✗ | out_size += ret; | |
| 1883 | ✗ | buf += fsize; | |
| 1884 | ✗ | len -= fsize; | |
| 1885 | |||
| 1886 | ✗ | avctx->bit_rate += m->bit_rate; | |
| 1887 | } | ||
| 1888 | ✗ | if (ch != avctx->ch_layout.nb_channels) { | |
| 1889 | ✗ | av_log(avctx, AV_LOG_ERROR, "failed to decode all channels\n"); | |
| 1890 | ✗ | return AVERROR_INVALIDDATA; | |
| 1891 | } | ||
| 1892 | |||
| 1893 | /* update codec info */ | ||
| 1894 | ✗ | avctx->sample_rate = s->mp3decctx[0]->sample_rate; | |
| 1895 | |||
| 1896 | ✗ | frame->nb_samples = out_size / (avctx->ch_layout.nb_channels * sizeof(OUT_INT)); | |
| 1897 | ✗ | *got_frame_ptr = 1; | |
| 1898 | |||
| 1899 | ✗ | return buf_size; | |
| 1900 | } | ||
| 1901 | #endif /* CONFIG_MP3ON4_DECODER || CONFIG_MP3ON4FLOAT_DECODER */ | ||
| 1902 |