mlp: Only initialize VLC tables once. This caused a crash when multiple
[libav.git] / libavcodec / mlpdec.c
CommitLineData
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1/*
2 * MLP decoder
3 * Copyright (c) 2007-2008 Ian Caulfield
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/**
bad5537e 23 * @file libavcodec/mlpdec.c
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24 * MLP decoder
25 */
26
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27#include <stdint.h>
28
b517af05 29#include "avcodec.h"
bf4f19dc 30#include "dsputil.h"
b517af05 31#include "libavutil/intreadwrite.h"
9106a698 32#include "get_bits.h"
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33#include "libavutil/crc.h"
34#include "parser.h"
35#include "mlp_parser.h"
ce15710f 36#include "mlp.h"
b517af05 37
9906a2be 38/** number of bits used for VLC lookup - longest Huffman code is 9 */
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39#define VLC_BITS 9
40
41
42static const char* sample_message =
43 "Please file a bug report following the instructions at "
0fa5f24c 44 "http://ffmpeg.org/bugreports.html and include "
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45 "a sample of this file.";
46
47typedef struct SubStream {
9906a2be 48 //! Set if a valid restart header has been read. Otherwise the substream cannot be decoded.
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49 uint8_t restart_seen;
50
51 //@{
52 /** restart header data */
53 //! The type of noise to be used in the rematrix stage.
54 uint16_t noise_type;
55
56 //! The index of the first channel coded in this substream.
57 uint8_t min_channel;
58 //! The index of the last channel coded in this substream.
59 uint8_t max_channel;
60 //! The number of channels input into the rematrix stage.
61 uint8_t max_matrix_channel;
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62 //! For each channel output by the matrix, the output channel to map it to
63 uint8_t ch_assign[MAX_CHANNELS];
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64
65 //! The left shift applied to random noise in 0x31ea substreams.
66 uint8_t noise_shift;
67 //! The current seed value for the pseudorandom noise generator(s).
68 uint32_t noisegen_seed;
69
70 //! Set if the substream contains extra info to check the size of VLC blocks.
71 uint8_t data_check_present;
72
73 //! Bitmask of which parameter sets are conveyed in a decoding parameter block.
74 uint8_t param_presence_flags;
75#define PARAM_BLOCKSIZE (1 << 7)
76#define PARAM_MATRIX (1 << 6)
77#define PARAM_OUTSHIFT (1 << 5)
78#define PARAM_QUANTSTEP (1 << 4)
79#define PARAM_FIR (1 << 3)
80#define PARAM_IIR (1 << 2)
81#define PARAM_HUFFOFFSET (1 << 1)
cbf3cf19 82#define PARAM_PRESENCE (1 << 0)
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83 //@}
84
85 //@{
86 /** matrix data */
87
88 //! Number of matrices to be applied.
89 uint8_t num_primitive_matrices;
90
91 //! matrix output channel
92 uint8_t matrix_out_ch[MAX_MATRICES];
93
94 //! Whether the LSBs of the matrix output are encoded in the bitstream.
95 uint8_t lsb_bypass[MAX_MATRICES];
96 //! Matrix coefficients, stored as 2.14 fixed point.
420df930 97 int32_t matrix_coeff[MAX_MATRICES][MAX_CHANNELS];
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98 //! Left shift to apply to noise values in 0x31eb substreams.
99 uint8_t matrix_noise_shift[MAX_MATRICES];
100 //@}
101
9906a2be 102 //! Left shift to apply to Huffman-decoded residuals.
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103 uint8_t quant_step_size[MAX_CHANNELS];
104
9906a2be 105 //! number of PCM samples in current audio block
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106 uint16_t blocksize;
107 //! Number of PCM samples decoded so far in this frame.
108 uint16_t blockpos;
109
110 //! Left shift to apply to decoded PCM values to get final 24-bit output.
111 int8_t output_shift[MAX_CHANNELS];
112
113 //! Running XOR of all output samples.
114 int32_t lossless_check_data;
115
116} SubStream;
117
118typedef struct MLPDecodeContext {
119 AVCodecContext *avctx;
120
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121 //! Current access unit being read has a major sync.
122 int is_major_sync_unit;
123
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124 //! Set if a valid major sync block has been read. Otherwise no decoding is possible.
125 uint8_t params_valid;
126
127 //! Number of substreams contained within this stream.
128 uint8_t num_substreams;
129
130 //! Index of the last substream to decode - further substreams are skipped.
131 uint8_t max_decoded_substream;
132
9906a2be 133 //! number of PCM samples contained in each frame
b517af05 134 int access_unit_size;
9906a2be 135 //! next power of two above the number of samples in each frame
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136 int access_unit_size_pow2;
137
138 SubStream substream[MAX_SUBSTREAMS];
139
f53acb7b 140 ChannelParams channel_params[MAX_CHANNELS];
b517af05 141
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142 int matrix_changed;
143 int filter_changed[MAX_CHANNELS][NUM_FILTERS];
144
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145 int8_t noise_buffer[MAX_BLOCKSIZE_POW2];
146 int8_t bypassed_lsbs[MAX_BLOCKSIZE][MAX_CHANNELS];
420df930 147 int32_t sample_buffer[MAX_BLOCKSIZE][MAX_CHANNELS];
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148
149 DSPContext dsp;
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150} MLPDecodeContext;
151
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152static VLC huff_vlc[3];
153
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154/** Initialize static data, constant between all invocations of the codec. */
155
dc8a7c93 156static av_cold void init_static(void)
b517af05 157{
7fd88069 158 if (!huff_vlc[0].bits) {
b517af05 159 INIT_VLC_STATIC(&huff_vlc[0], VLC_BITS, 18,
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160 &ff_mlp_huffman_tables[0][0][1], 2, 1,
161 &ff_mlp_huffman_tables[0][0][0], 2, 1, 512);
b517af05 162 INIT_VLC_STATIC(&huff_vlc[1], VLC_BITS, 16,
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163 &ff_mlp_huffman_tables[1][0][1], 2, 1,
164 &ff_mlp_huffman_tables[1][0][0], 2, 1, 512);
b517af05 165 INIT_VLC_STATIC(&huff_vlc[2], VLC_BITS, 15,
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166 &ff_mlp_huffman_tables[2][0][1], 2, 1,
167 &ff_mlp_huffman_tables[2][0][0], 2, 1, 512);
7fd88069 168 }
b517af05 169
ce15710f 170 ff_mlp_init_crc();
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171}
172
173static inline int32_t calculate_sign_huff(MLPDecodeContext *m,
174 unsigned int substr, unsigned int ch)
175{
f53acb7b 176 ChannelParams *cp = &m->channel_params[ch];
b517af05 177 SubStream *s = &m->substream[substr];
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178 int lsb_bits = cp->huff_lsbs - s->quant_step_size[ch];
179 int sign_shift = lsb_bits + (cp->codebook ? 2 - cp->codebook : -1);
180 int32_t sign_huff_offset = cp->huff_offset;
b517af05 181
f53acb7b 182 if (cp->codebook > 0)
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183 sign_huff_offset -= 7 << lsb_bits;
184
185 if (sign_shift >= 0)
186 sign_huff_offset -= 1 << sign_shift;
187
188 return sign_huff_offset;
189}
190
191/** Read a sample, consisting of either, both or neither of entropy-coded MSBs
192 * and plain LSBs. */
193
194static inline int read_huff_channels(MLPDecodeContext *m, GetBitContext *gbp,
195 unsigned int substr, unsigned int pos)
196{
197 SubStream *s = &m->substream[substr];
198 unsigned int mat, channel;
199
200 for (mat = 0; mat < s->num_primitive_matrices; mat++)
201 if (s->lsb_bypass[mat])
202 m->bypassed_lsbs[pos + s->blockpos][mat] = get_bits1(gbp);
203
204 for (channel = s->min_channel; channel <= s->max_channel; channel++) {
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205 ChannelParams *cp = &m->channel_params[channel];
206 int codebook = cp->codebook;
b517af05 207 int quant_step_size = s->quant_step_size[channel];
f53acb7b 208 int lsb_bits = cp->huff_lsbs - quant_step_size;
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209 int result = 0;
210
211 if (codebook > 0)
212 result = get_vlc2(gbp, huff_vlc[codebook-1].table,
213 VLC_BITS, (9 + VLC_BITS - 1) / VLC_BITS);
214
215 if (result < 0)
216 return -1;
217
218 if (lsb_bits > 0)
219 result = (result << lsb_bits) + get_bits(gbp, lsb_bits);
220
f53acb7b 221 result += cp->sign_huff_offset;
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222 result <<= quant_step_size;
223
224 m->sample_buffer[pos + s->blockpos][channel] = result;
225 }
226
227 return 0;
228}
229
230static av_cold int mlp_decode_init(AVCodecContext *avctx)
231{
232 MLPDecodeContext *m = avctx->priv_data;
233 int substr;
234
235 init_static();
236 m->avctx = avctx;
237 for (substr = 0; substr < MAX_SUBSTREAMS; substr++)
238 m->substream[substr].lossless_check_data = 0xffffffff;
bf4f19dc 239 dsputil_init(&m->dsp, avctx);
ee1a8f62 240
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241 return 0;
242}
243
244/** Read a major sync info header - contains high level information about
245 * the stream - sample rate, channel arrangement etc. Most of this
246 * information is not actually necessary for decoding, only for playback.
247 */
248
249static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb)
250{
251 MLPHeaderInfo mh;
252 int substr;
253
254 if (ff_mlp_read_major_sync(m->avctx, &mh, gb) != 0)
255 return -1;
256
257 if (mh.group1_bits == 0) {
9906a2be 258 av_log(m->avctx, AV_LOG_ERROR, "invalid/unknown bits per sample\n");
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259 return -1;
260 }
261 if (mh.group2_bits > mh.group1_bits) {
262 av_log(m->avctx, AV_LOG_ERROR,
9906a2be 263 "Channel group 2 cannot have more bits per sample than group 1.\n");
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264 return -1;
265 }
266
267 if (mh.group2_samplerate && mh.group2_samplerate != mh.group1_samplerate) {
268 av_log(m->avctx, AV_LOG_ERROR,
9906a2be 269 "Channel groups with differing sample rates are not currently supported.\n");
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270 return -1;
271 }
272
273 if (mh.group1_samplerate == 0) {
9906a2be 274 av_log(m->avctx, AV_LOG_ERROR, "invalid/unknown sampling rate\n");
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275 return -1;
276 }
277 if (mh.group1_samplerate > MAX_SAMPLERATE) {
278 av_log(m->avctx, AV_LOG_ERROR,
9906a2be 279 "Sampling rate %d is greater than the supported maximum (%d).\n",
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280 mh.group1_samplerate, MAX_SAMPLERATE);
281 return -1;
282 }
283 if (mh.access_unit_size > MAX_BLOCKSIZE) {
284 av_log(m->avctx, AV_LOG_ERROR,
9906a2be 285 "Block size %d is greater than the supported maximum (%d).\n",
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286 mh.access_unit_size, MAX_BLOCKSIZE);
287 return -1;
288 }
289 if (mh.access_unit_size_pow2 > MAX_BLOCKSIZE_POW2) {
290 av_log(m->avctx, AV_LOG_ERROR,
9906a2be 291 "Block size pow2 %d is greater than the supported maximum (%d).\n",
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292 mh.access_unit_size_pow2, MAX_BLOCKSIZE_POW2);
293 return -1;
294 }
295
296 if (mh.num_substreams == 0)
297 return -1;
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298 if (m->avctx->codec_id == CODEC_ID_MLP && mh.num_substreams > 2) {
299 av_log(m->avctx, AV_LOG_ERROR, "MLP only supports up to 2 substreams.\n");
300 return -1;
301 }
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302 if (mh.num_substreams > MAX_SUBSTREAMS) {
303 av_log(m->avctx, AV_LOG_ERROR,
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304 "Number of substreams %d is larger than the maximum supported "
305 "by the decoder. %s\n", mh.num_substreams, sample_message);
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306 return -1;
307 }
308
309 m->access_unit_size = mh.access_unit_size;
310 m->access_unit_size_pow2 = mh.access_unit_size_pow2;
311
312 m->num_substreams = mh.num_substreams;
313 m->max_decoded_substream = m->num_substreams - 1;
314
315 m->avctx->sample_rate = mh.group1_samplerate;
316 m->avctx->frame_size = mh.access_unit_size;
317
97679e6e 318 m->avctx->bits_per_raw_sample = mh.group1_bits;
c687643c 319 if (mh.group1_bits > 16)
b517af05 320 m->avctx->sample_fmt = SAMPLE_FMT_S32;
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321 else
322 m->avctx->sample_fmt = SAMPLE_FMT_S16;
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323
324 m->params_valid = 1;
325 for (substr = 0; substr < MAX_SUBSTREAMS; substr++)
326 m->substream[substr].restart_seen = 0;
327
328 return 0;
329}
330
331/** Read a restart header from a block in a substream. This contains parameters
332 * required to decode the audio that do not change very often. Generally
333 * (always) present only in blocks following a major sync. */
334
335static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp,
336 const uint8_t *buf, unsigned int substr)
337{
338 SubStream *s = &m->substream[substr];
339 unsigned int ch;
340 int sync_word, tmp;
341 uint8_t checksum;
342 uint8_t lossless_check;
343 int start_count = get_bits_count(gbp);
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344 const int max_matrix_channel = m->avctx->codec_id == CODEC_ID_MLP
345 ? MAX_MATRIX_CHANNEL_MLP
346 : MAX_MATRIX_CHANNEL_TRUEHD;
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347
348 sync_word = get_bits(gbp, 13);
349
e8d341ce 350 if (sync_word != 0x31ea >> 1) {
b517af05 351 av_log(m->avctx, AV_LOG_ERROR,
9906a2be 352 "restart header sync incorrect (got 0x%04x)\n", sync_word);
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353 return -1;
354 }
b517af05 355
e8d341ce
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356 s->noise_type = get_bits1(gbp);
357
358 if (m->avctx->codec_id == CODEC_ID_MLP && s->noise_type) {
359 av_log(m->avctx, AV_LOG_ERROR, "MLP must have 0x31ea sync word.\n");
360 return -1;
361 }
362
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363 skip_bits(gbp, 16); /* Output timestamp */
364
365 s->min_channel = get_bits(gbp, 4);
366 s->max_channel = get_bits(gbp, 4);
367 s->max_matrix_channel = get_bits(gbp, 4);
368
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369 if (s->max_matrix_channel > max_matrix_channel) {
370 av_log(m->avctx, AV_LOG_ERROR,
371 "Max matrix channel cannot be greater than %d.\n",
372 max_matrix_channel);
373 return -1;
374 }
375
376 if (s->max_channel != s->max_matrix_channel) {
377 av_log(m->avctx, AV_LOG_ERROR,
378 "Max channel must be equal max matrix channel.\n");
379 return -1;
380 }
381
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382 /* This should happen for TrueHD streams with >6 channels and MLP's noise
383 * type. It is not yet known if this is allowed. */
384 if (s->max_channel > MAX_MATRIX_CHANNEL_MLP && !s->noise_type) {
385 av_log(m->avctx, AV_LOG_ERROR,
386 "Number of channels %d is larger than the maximum supported "
387 "by the decoder. %s\n", s->max_channel+2, sample_message);
388 return -1;
389 }
390
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391 if (s->min_channel > s->max_channel) {
392 av_log(m->avctx, AV_LOG_ERROR,
393 "Substream min channel cannot be greater than max channel.\n");
394 return -1;
395 }
396
397 if (m->avctx->request_channels > 0
398 && s->max_channel + 1 >= m->avctx->request_channels
399 && substr < m->max_decoded_substream) {
400 av_log(m->avctx, AV_LOG_INFO,
401 "Extracting %d channel downmix from substream %d. "
402 "Further substreams will be skipped.\n",
403 s->max_channel + 1, substr);
404 m->max_decoded_substream = substr;
405 }
406
407 s->noise_shift = get_bits(gbp, 4);
408 s->noisegen_seed = get_bits(gbp, 23);
409
410 skip_bits(gbp, 19);
411
412 s->data_check_present = get_bits1(gbp);
413 lossless_check = get_bits(gbp, 8);
414 if (substr == m->max_decoded_substream
415 && s->lossless_check_data != 0xffffffff) {
a7cc783d 416 tmp = xor_32_to_8(s->lossless_check_data);
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417 if (tmp != lossless_check)
418 av_log(m->avctx, AV_LOG_WARNING,
9906a2be 419 "Lossless check failed - expected %02x, calculated %02x.\n",
b517af05 420 lossless_check, tmp);
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421 }
422
423 skip_bits(gbp, 16);
424
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425 memset(s->ch_assign, 0, sizeof(s->ch_assign));
426
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427 for (ch = 0; ch <= s->max_matrix_channel; ch++) {
428 int ch_assign = get_bits(gbp, 6);
9731e7f1 429 if (ch_assign > s->max_matrix_channel) {
b517af05 430 av_log(m->avctx, AV_LOG_ERROR,
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431 "Assignment of matrix channel %d to invalid output channel %d. %s\n",
432 ch, ch_assign, sample_message);
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433 return -1;
434 }
9731e7f1 435 s->ch_assign[ch_assign] = ch;
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436 }
437
ce15710f 438 checksum = ff_mlp_restart_checksum(buf, get_bits_count(gbp) - start_count);
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439
440 if (checksum != get_bits(gbp, 8))
9906a2be 441 av_log(m->avctx, AV_LOG_ERROR, "restart header checksum error\n");
b517af05 442
9906a2be 443 /* Set default decoding parameters. */
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444 s->param_presence_flags = 0xff;
445 s->num_primitive_matrices = 0;
446 s->blocksize = 8;
447 s->lossless_check_data = 0;
448
449 memset(s->output_shift , 0, sizeof(s->output_shift ));
450 memset(s->quant_step_size, 0, sizeof(s->quant_step_size));
451
452 for (ch = s->min_channel; ch <= s->max_channel; ch++) {
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453 ChannelParams *cp = &m->channel_params[ch];
454 cp->filter_params[FIR].order = 0;
455 cp->filter_params[IIR].order = 0;
456 cp->filter_params[FIR].shift = 0;
457 cp->filter_params[IIR].shift = 0;
b517af05 458
9906a2be 459 /* Default audio coding is 24-bit raw PCM. */
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460 cp->huff_offset = 0;
461 cp->sign_huff_offset = (-1) << 23;
462 cp->codebook = 0;
463 cp->huff_lsbs = 24;
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464 }
465
f95f6ab9 466 if (substr == m->max_decoded_substream)
9731e7f1 467 m->avctx->channels = s->max_matrix_channel + 1;
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468
469 return 0;
470}
471
472/** Read parameters for one of the prediction filters. */
473
474static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp,
475 unsigned int channel, unsigned int filter)
476{
f53acb7b 477 FilterParams *fp = &m->channel_params[channel].filter_params[filter];
0c5670a0 478 const int max_order = filter ? MAX_IIR_ORDER : MAX_FIR_ORDER;
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479 const char fchar = filter ? 'I' : 'F';
480 int i, order;
481
9906a2be 482 // Filter is 0 for FIR, 1 for IIR.
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483 assert(filter < 2);
484
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RP
485 if (m->filter_changed[channel][filter]++ > 1) {
486 av_log(m->avctx, AV_LOG_ERROR, "Filters may change only once per access unit.\n");
487 return -1;
488 }
75428fa4 489
b517af05 490 order = get_bits(gbp, 4);
0c5670a0 491 if (order > max_order) {
b517af05 492 av_log(m->avctx, AV_LOG_ERROR,
9906a2be 493 "%cIR filter order %d is greater than maximum %d.\n",
0c5670a0 494 fchar, order, max_order);
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495 return -1;
496 }
d6aa052d 497 fp->order = order;
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498
499 if (order > 0) {
13bd2044 500 int32_t *fcoeff = m->channel_params[channel].coeff[filter];
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501 int coeff_bits, coeff_shift;
502
d6aa052d 503 fp->shift = get_bits(gbp, 4);
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504
505 coeff_bits = get_bits(gbp, 5);
506 coeff_shift = get_bits(gbp, 3);
507 if (coeff_bits < 1 || coeff_bits > 16) {
508 av_log(m->avctx, AV_LOG_ERROR,
9906a2be 509 "%cIR filter coeff_bits must be between 1 and 16.\n",
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510 fchar);
511 return -1;
512 }
513 if (coeff_bits + coeff_shift > 16) {
514 av_log(m->avctx, AV_LOG_ERROR,
9906a2be 515 "Sum of coeff_bits and coeff_shift for %cIR filter must be 16 or less.\n",
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516 fchar);
517 return -1;
518 }
519
520 for (i = 0; i < order; i++)
13bd2044 521 fcoeff[i] = get_sbits(gbp, coeff_bits) << coeff_shift;
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522
523 if (get_bits1(gbp)) {
524 int state_bits, state_shift;
525
526 if (filter == FIR) {
527 av_log(m->avctx, AV_LOG_ERROR,
9906a2be 528 "FIR filter has state data specified.\n");
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529 return -1;
530 }
531
532 state_bits = get_bits(gbp, 4);
533 state_shift = get_bits(gbp, 4);
534
9906a2be 535 /* TODO: Check validity of state data. */
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536
537 for (i = 0; i < order; i++)
db01fa13 538 fp->state[i] = get_sbits(gbp, state_bits) << state_shift;
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539 }
540 }
541
542 return 0;
543}
544
f8e6293b
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545/** Read parameters for primitive matrices. */
546
95c14b1e 547static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitContext *gbp)
f8e6293b 548{
95c14b1e 549 SubStream *s = &m->substream[substr];
f8e6293b 550 unsigned int mat, ch;
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551 const int max_primitive_matrices = m->avctx->codec_id == CODEC_ID_MLP
552 ? MAX_MATRICES_MLP
553 : MAX_MATRICES_TRUEHD;
f8e6293b 554
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RP
555 if (m->matrix_changed++ > 1) {
556 av_log(m->avctx, AV_LOG_ERROR, "Matrices may change only once per access unit.\n");
557 return -1;
558 }
559
f8e6293b
RP
560 s->num_primitive_matrices = get_bits(gbp, 4);
561
309616b2
RP
562 if (s->num_primitive_matrices > max_primitive_matrices) {
563 av_log(m->avctx, AV_LOG_ERROR,
564 "Number of primitive matrices cannot be greater than %d.\n",
565 max_primitive_matrices);
566 return -1;
567 }
568
f8e6293b
RP
569 for (mat = 0; mat < s->num_primitive_matrices; mat++) {
570 int frac_bits, max_chan;
571 s->matrix_out_ch[mat] = get_bits(gbp, 4);
572 frac_bits = get_bits(gbp, 4);
573 s->lsb_bypass [mat] = get_bits1(gbp);
574
0091d8a1 575 if (s->matrix_out_ch[mat] > s->max_matrix_channel) {
f8e6293b
RP
576 av_log(m->avctx, AV_LOG_ERROR,
577 "Invalid channel %d specified as output from matrix.\n",
578 s->matrix_out_ch[mat]);
579 return -1;
580 }
581 if (frac_bits > 14) {
582 av_log(m->avctx, AV_LOG_ERROR,
583 "Too many fractional bits specified.\n");
584 return -1;
585 }
586
587 max_chan = s->max_matrix_channel;
588 if (!s->noise_type)
589 max_chan+=2;
590
591 for (ch = 0; ch <= max_chan; ch++) {
592 int coeff_val = 0;
593 if (get_bits1(gbp))
594 coeff_val = get_sbits(gbp, frac_bits + 2);
595
596 s->matrix_coeff[mat][ch] = coeff_val << (14 - frac_bits);
597 }
598
599 if (s->noise_type)
600 s->matrix_noise_shift[mat] = get_bits(gbp, 4);
601 else
602 s->matrix_noise_shift[mat] = 0;
603 }
604
605 return 0;
606}
607
43ee5fe0
RP
608/** Read channel parameters. */
609
610static int read_channel_params(MLPDecodeContext *m, unsigned int substr,
611 GetBitContext *gbp, unsigned int ch)
612{
613 ChannelParams *cp = &m->channel_params[ch];
614 FilterParams *fir = &cp->filter_params[FIR];
615 FilterParams *iir = &cp->filter_params[IIR];
616 SubStream *s = &m->substream[substr];
617
618 if (s->param_presence_flags & PARAM_FIR)
619 if (get_bits1(gbp))
620 if (read_filter_params(m, gbp, ch, FIR) < 0)
621 return -1;
622
623 if (s->param_presence_flags & PARAM_IIR)
624 if (get_bits1(gbp))
625 if (read_filter_params(m, gbp, ch, IIR) < 0)
626 return -1;
627
125cf771
RP
628 if (fir->order + iir->order > 8) {
629 av_log(m->avctx, AV_LOG_ERROR, "Total filter orders too high.\n");
630 return -1;
631 }
632
43ee5fe0
RP
633 if (fir->order && iir->order &&
634 fir->shift != iir->shift) {
635 av_log(m->avctx, AV_LOG_ERROR,
636 "FIR and IIR filters must use the same precision.\n");
637 return -1;
638 }
639 /* The FIR and IIR filters must have the same precision.
aff42ee0
RP
640 * To simplify the filtering code, only the precision of the
641 * FIR filter is considered. If only the IIR filter is employed,
642 * the FIR filter precision is set to that of the IIR filter, so
643 * that the filtering code can use it. */
43ee5fe0
RP
644 if (!fir->order && iir->order)
645 fir->shift = iir->shift;
646
647 if (s->param_presence_flags & PARAM_HUFFOFFSET)
648 if (get_bits1(gbp))
649 cp->huff_offset = get_sbits(gbp, 15);
650
651 cp->codebook = get_bits(gbp, 2);
652 cp->huff_lsbs = get_bits(gbp, 5);
653
125cf771
RP
654 if (cp->huff_lsbs > 24) {
655 av_log(m->avctx, AV_LOG_ERROR, "Invalid huff_lsbs.\n");
656 return -1;
657 }
43ee5fe0 658
125cf771 659 cp->sign_huff_offset = calculate_sign_huff(m, substr, ch);
43ee5fe0
RP
660
661 return 0;
662}
663
b517af05
RP
664/** Read decoding parameters that change more often than those in the restart
665 * header. */
666
667static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp,
668 unsigned int substr)
669{
670 SubStream *s = &m->substream[substr];
f8e6293b 671 unsigned int ch;
b517af05 672
cbf3cf19 673 if (s->param_presence_flags & PARAM_PRESENCE)
f95f6ab9
RP
674 if (get_bits1(gbp))
675 s->param_presence_flags = get_bits(gbp, 8);
b517af05
RP
676
677 if (s->param_presence_flags & PARAM_BLOCKSIZE)
678 if (get_bits1(gbp)) {
679 s->blocksize = get_bits(gbp, 9);
b864098c
RP
680 if (s->blocksize < 8 || s->blocksize > m->access_unit_size) {
681 av_log(m->avctx, AV_LOG_ERROR, "Invalid blocksize.");
b517af05
RP
682 s->blocksize = 0;
683 return -1;
684 }
685 }
686
687 if (s->param_presence_flags & PARAM_MATRIX)
f95f6ab9 688 if (get_bits1(gbp))
95c14b1e 689 if (read_matrix_params(m, substr, gbp) < 0)
f8e6293b 690 return -1;
b517af05
RP
691
692 if (s->param_presence_flags & PARAM_OUTSHIFT)
693 if (get_bits1(gbp))
f95f6ab9 694 for (ch = 0; ch <= s->max_matrix_channel; ch++)
af048026 695 s->output_shift[ch] = get_sbits(gbp, 4);
b517af05
RP
696
697 if (s->param_presence_flags & PARAM_QUANTSTEP)
698 if (get_bits1(gbp))
699 for (ch = 0; ch <= s->max_channel; ch++) {
f53acb7b
RP
700 ChannelParams *cp = &m->channel_params[ch];
701
b517af05 702 s->quant_step_size[ch] = get_bits(gbp, 4);
b517af05 703
f53acb7b 704 cp->sign_huff_offset = calculate_sign_huff(m, substr, ch);
b517af05
RP
705 }
706
707 for (ch = s->min_channel; ch <= s->max_channel; ch++)
f95f6ab9 708 if (get_bits1(gbp))
43ee5fe0 709 if (read_channel_params(m, substr, gbp, ch) < 0)
b517af05 710 return -1;
b517af05
RP
711
712 return 0;
713}
714
715#define MSB_MASK(bits) (-1u << bits)
716
717/** Generate PCM samples using the prediction filters and residual values
718 * read from the data stream, and update the filter state. */
719
720static void filter_channel(MLPDecodeContext *m, unsigned int substr,
721 unsigned int channel)
722{
723 SubStream *s = &m->substream[substr];
13bd2044
RP
724 const int32_t *fircoeff = m->channel_params[channel].coeff[FIR];
725 int32_t state_buffer[NUM_FILTERS][MAX_BLOCKSIZE + MAX_FIR_ORDER];
726 int32_t *firbuf = state_buffer[FIR] + MAX_BLOCKSIZE;
727 int32_t *iirbuf = state_buffer[IIR] + MAX_BLOCKSIZE;
e71365f4
RP
728 FilterParams *fir = &m->channel_params[channel].filter_params[FIR];
729 FilterParams *iir = &m->channel_params[channel].filter_params[IIR];
730 unsigned int filter_shift = fir->shift;
b517af05 731 int32_t mask = MSB_MASK(s->quant_step_size[channel]);
b517af05 732
77b12f80
RP
733 memcpy(firbuf, fir->state, MAX_FIR_ORDER * sizeof(int32_t));
734 memcpy(iirbuf, iir->state, MAX_IIR_ORDER * sizeof(int32_t));
b517af05 735
13bd2044
RP
736 m->dsp.mlp_filter_channel(firbuf, fircoeff,
737 fir->order, iir->order,
bf4f19dc
RP
738 filter_shift, mask, s->blocksize,
739 &m->sample_buffer[s->blockpos][channel]);
b517af05 740
bf4f19dc
RP
741 memcpy(fir->state, firbuf - s->blocksize, MAX_FIR_ORDER * sizeof(int32_t));
742 memcpy(iir->state, iirbuf - s->blocksize, MAX_IIR_ORDER * sizeof(int32_t));
b517af05
RP
743}
744
745/** Read a block of PCM residual data (or actual if no filtering active). */
746
747static int read_block_data(MLPDecodeContext *m, GetBitContext *gbp,
748 unsigned int substr)
749{
750 SubStream *s = &m->substream[substr];
751 unsigned int i, ch, expected_stream_pos = 0;
752
753 if (s->data_check_present) {
754 expected_stream_pos = get_bits_count(gbp);
755 expected_stream_pos += get_bits(gbp, 16);
756 av_log(m->avctx, AV_LOG_WARNING, "This file contains some features "
757 "we have not tested yet. %s\n", sample_message);
758 }
759
760 if (s->blockpos + s->blocksize > m->access_unit_size) {
9906a2be 761 av_log(m->avctx, AV_LOG_ERROR, "too many audio samples in frame\n");
b517af05
RP
762 return -1;
763 }
764
765 memset(&m->bypassed_lsbs[s->blockpos][0], 0,
766 s->blocksize * sizeof(m->bypassed_lsbs[0]));
767
f95f6ab9 768 for (i = 0; i < s->blocksize; i++)
b517af05
RP
769 if (read_huff_channels(m, gbp, substr, i) < 0)
770 return -1;
b517af05 771
f95f6ab9 772 for (ch = s->min_channel; ch <= s->max_channel; ch++)
b517af05 773 filter_channel(m, substr, ch);
b517af05
RP
774
775 s->blockpos += s->blocksize;
776
777 if (s->data_check_present) {
778 if (get_bits_count(gbp) != expected_stream_pos)
9906a2be 779 av_log(m->avctx, AV_LOG_ERROR, "block data length mismatch\n");
b517af05
RP
780 skip_bits(gbp, 8);
781 }
782
783 return 0;
784}
785
9906a2be 786/** Data table used for TrueHD noise generation function. */
b517af05
RP
787
788static const int8_t noise_table[256] = {
789 30, 51, 22, 54, 3, 7, -4, 38, 14, 55, 46, 81, 22, 58, -3, 2,
790 52, 31, -7, 51, 15, 44, 74, 30, 85, -17, 10, 33, 18, 80, 28, 62,
791 10, 32, 23, 69, 72, 26, 35, 17, 73, 60, 8, 56, 2, 6, -2, -5,
792 51, 4, 11, 50, 66, 76, 21, 44, 33, 47, 1, 26, 64, 48, 57, 40,
793 38, 16, -10, -28, 92, 22, -18, 29, -10, 5, -13, 49, 19, 24, 70, 34,
794 61, 48, 30, 14, -6, 25, 58, 33, 42, 60, 67, 17, 54, 17, 22, 30,
795 67, 44, -9, 50, -11, 43, 40, 32, 59, 82, 13, 49, -14, 55, 60, 36,
796 48, 49, 31, 47, 15, 12, 4, 65, 1, 23, 29, 39, 45, -2, 84, 69,
797 0, 72, 37, 57, 27, 41, -15, -16, 35, 31, 14, 61, 24, 0, 27, 24,
798 16, 41, 55, 34, 53, 9, 56, 12, 25, 29, 53, 5, 20, -20, -8, 20,
799 13, 28, -3, 78, 38, 16, 11, 62, 46, 29, 21, 24, 46, 65, 43, -23,
800 89, 18, 74, 21, 38, -12, 19, 12, -19, 8, 15, 33, 4, 57, 9, -8,
801 36, 35, 26, 28, 7, 83, 63, 79, 75, 11, 3, 87, 37, 47, 34, 40,
802 39, 19, 20, 42, 27, 34, 39, 77, 13, 42, 59, 64, 45, -1, 32, 37,
803 45, -5, 53, -6, 7, 36, 50, 23, 6, 32, 9, -21, 18, 71, 27, 52,
804 -25, 31, 35, 42, -1, 68, 63, 52, 26, 43, 66, 37, 41, 25, 40, 70,
805};
806
807/** Noise generation functions.
808 * I'm not sure what these are for - they seem to be some kind of pseudorandom
809 * sequence generators, used to generate noise data which is used when the
810 * channels are rematrixed. I'm not sure if they provide a practical benefit
811 * to compression, or just obfuscate the decoder. Are they for some kind of
812 * dithering? */
813
814/** Generate two channels of noise, used in the matrix when
815 * restart sync word == 0x31ea. */
816
817static void generate_2_noise_channels(MLPDecodeContext *m, unsigned int substr)
818{
819 SubStream *s = &m->substream[substr];
820 unsigned int i;
821 uint32_t seed = s->noisegen_seed;
822 unsigned int maxchan = s->max_matrix_channel;
823
824 for (i = 0; i < s->blockpos; i++) {
825 uint16_t seed_shr7 = seed >> 7;
826 m->sample_buffer[i][maxchan+1] = ((int8_t)(seed >> 15)) << s->noise_shift;
827 m->sample_buffer[i][maxchan+2] = ((int8_t) seed_shr7) << s->noise_shift;
828
829 seed = (seed << 16) ^ seed_shr7 ^ (seed_shr7 << 5);
830 }
831
832 s->noisegen_seed = seed;
833}
834
835/** Generate a block of noise, used when restart sync word == 0x31eb. */
836
837static void fill_noise_buffer(MLPDecodeContext *m, unsigned int substr)
838{
839 SubStream *s = &m->substream[substr];
840 unsigned int i;
841 uint32_t seed = s->noisegen_seed;
842
843 for (i = 0; i < m->access_unit_size_pow2; i++) {
844 uint8_t seed_shr15 = seed >> 15;
845 m->noise_buffer[i] = noise_table[seed_shr15];
846 seed = (seed << 8) ^ seed_shr15 ^ (seed_shr15 << 5);
847 }
848
849 s->noisegen_seed = seed;
850}
851
852
853/** Apply the channel matrices in turn to reconstruct the original audio
854 * samples. */
855
856static void rematrix_channels(MLPDecodeContext *m, unsigned int substr)
857{
858 SubStream *s = &m->substream[substr];
859 unsigned int mat, src_ch, i;
860 unsigned int maxchan;
861
862 maxchan = s->max_matrix_channel;
863 if (!s->noise_type) {
864 generate_2_noise_channels(m, substr);
865 maxchan += 2;
866 } else {
867 fill_noise_buffer(m, substr);
868 }
869
870 for (mat = 0; mat < s->num_primitive_matrices; mat++) {
871 int matrix_noise_shift = s->matrix_noise_shift[mat];
872 unsigned int dest_ch = s->matrix_out_ch[mat];
873 int32_t mask = MSB_MASK(s->quant_step_size[dest_ch]);
63ad832d 874 int32_t *coeffs = s->matrix_coeff[mat];
15e6748b
RP
875 int index = s->num_primitive_matrices - mat;
876 int index2 = 2 * index + 1;
b517af05
RP
877
878 /* TODO: DSPContext? */
879
880 for (i = 0; i < s->blockpos; i++) {
a256445e 881 int32_t bypassed_lsb = m->bypassed_lsbs[i][mat];
63ad832d 882 int32_t *samples = m->sample_buffer[i];
b517af05 883 int64_t accum = 0;
f95f6ab9
RP
884
885 for (src_ch = 0; src_ch <= maxchan; src_ch++)
886 accum += (int64_t) samples[src_ch] * coeffs[src_ch];
887
b517af05 888 if (matrix_noise_shift) {
15e6748b 889 index &= m->access_unit_size_pow2 - 1;
b517af05 890 accum += m->noise_buffer[index] << (matrix_noise_shift + 7);
15e6748b 891 index += index2;
b517af05 892 }
f95f6ab9 893
a256445e 894 samples[dest_ch] = ((accum >> 14) & mask) + bypassed_lsb;
b517af05
RP
895 }
896 }
897}
898
899/** Write the audio data into the output buffer. */
900
901static int output_data_internal(MLPDecodeContext *m, unsigned int substr,
902 uint8_t *data, unsigned int *data_size, int is32)
903{
904 SubStream *s = &m->substream[substr];
9731e7f1 905 unsigned int i, out_ch = 0;
b517af05
RP
906 int32_t *data_32 = (int32_t*) data;
907 int16_t *data_16 = (int16_t*) data;
908
909 if (*data_size < (s->max_channel + 1) * s->blockpos * (is32 ? 4 : 2))
910 return -1;
911
912 for (i = 0; i < s->blockpos; i++) {
9731e7f1
RP
913 for (out_ch = 0; out_ch <= s->max_matrix_channel; out_ch++) {
914 int mat_ch = s->ch_assign[out_ch];
915 int32_t sample = m->sample_buffer[i][mat_ch]
916 << s->output_shift[mat_ch];
917 s->lossless_check_data ^= (sample & 0xffffff) << mat_ch;
b517af05
RP
918 if (is32) *data_32++ = sample << 8;
919 else *data_16++ = sample >> 8;
920 }
921 }
922
9731e7f1 923 *data_size = i * out_ch * (is32 ? 4 : 2);
b517af05
RP
924
925 return 0;
926}
927
928static int output_data(MLPDecodeContext *m, unsigned int substr,
929 uint8_t *data, unsigned int *data_size)
930{
931 if (m->avctx->sample_fmt == SAMPLE_FMT_S32)
932 return output_data_internal(m, substr, data, data_size, 1);
933 else
934 return output_data_internal(m, substr, data, data_size, 0);
935}
936
937
b517af05
RP
938/** Read an access unit from the stream.
939 * Returns < 0 on error, 0 if not enough data is present in the input stream
940 * otherwise returns the number of bytes consumed. */
941
942static int read_access_unit(AVCodecContext *avctx, void* data, int *data_size,
7a00bbad 943 AVPacket *avpkt)
b517af05 944{
7a00bbad
TB
945 const uint8_t *buf = avpkt->data;
946 int buf_size = avpkt->size;
b517af05
RP
947 MLPDecodeContext *m = avctx->priv_data;
948 GetBitContext gb;
949 unsigned int length, substr;
950 unsigned int substream_start;
951 unsigned int header_size = 4;
952 unsigned int substr_header_size = 0;
953 uint8_t substream_parity_present[MAX_SUBSTREAMS];
954 uint16_t substream_data_len[MAX_SUBSTREAMS];
955 uint8_t parity_bits;
956
957 if (buf_size < 4)
958 return 0;
959
960 length = (AV_RB16(buf) & 0xfff) * 2;
961
962 if (length > buf_size)
963 return -1;
964
965 init_get_bits(&gb, (buf + 4), (length - 4) * 8);
966
cc9c5126 967 m->is_major_sync_unit = 0;
b517af05 968 if (show_bits_long(&gb, 31) == (0xf8726fba >> 1)) {
b517af05
RP
969 if (read_major_sync(m, &gb) < 0)
970 goto error;
cc9c5126 971 m->is_major_sync_unit = 1;
b517af05
RP
972 header_size += 28;
973 }
974
975 if (!m->params_valid) {
976 av_log(m->avctx, AV_LOG_WARNING,
9906a2be 977 "Stream parameters not seen; skipping frame.\n");
b517af05
RP
978 *data_size = 0;
979 return length;
980 }
981
982 substream_start = 0;
983
984 for (substr = 0; substr < m->num_substreams; substr++) {
cc9c5126 985 int extraword_present, checkdata_present, end, nonrestart_substr;
b517af05
RP
986
987 extraword_present = get_bits1(&gb);
cc9c5126 988 nonrestart_substr = get_bits1(&gb);
b517af05
RP
989 checkdata_present = get_bits1(&gb);
990 skip_bits1(&gb);
991
992 end = get_bits(&gb, 12) * 2;
993
994 substr_header_size += 2;
995
996 if (extraword_present) {
89e39be3
RP
997 if (m->avctx->codec_id == CODEC_ID_MLP) {
998 av_log(m->avctx, AV_LOG_ERROR, "There must be no extraword for MLP.\n");
999 goto error;
1000 }
b517af05
RP
1001 skip_bits(&gb, 16);
1002 substr_header_size += 2;
1003 }
1004
cc9c5126
RP
1005 if (!(nonrestart_substr ^ m->is_major_sync_unit)) {
1006 av_log(m->avctx, AV_LOG_ERROR, "Invalid nonrestart_substr.\n");
1007 goto error;
1008 }
1009
b517af05
RP
1010 if (end + header_size + substr_header_size > length) {
1011 av_log(m->avctx, AV_LOG_ERROR,
1012 "Indicated length of substream %d data goes off end of "
1013 "packet.\n", substr);
1014 end = length - header_size - substr_header_size;
1015 }
1016
1017 if (end < substream_start) {
1018 av_log(avctx, AV_LOG_ERROR,
1019 "Indicated end offset of substream %d data "
1020 "is smaller than calculated start offset.\n",
1021 substr);
1022 goto error;
1023 }
1024
1025 if (substr > m->max_decoded_substream)
1026 continue;
1027
1028 substream_parity_present[substr] = checkdata_present;
1029 substream_data_len[substr] = end - substream_start;
1030 substream_start = end;
1031 }
1032
ce15710f
RP
1033 parity_bits = ff_mlp_calculate_parity(buf, 4);
1034 parity_bits ^= ff_mlp_calculate_parity(buf + header_size, substr_header_size);
b517af05
RP
1035
1036 if ((((parity_bits >> 4) ^ parity_bits) & 0xF) != 0xF) {
1037 av_log(avctx, AV_LOG_ERROR, "Parity check failed.\n");
1038 goto error;
1039 }
1040
1041 buf += header_size + substr_header_size;
1042
1043 for (substr = 0; substr <= m->max_decoded_substream; substr++) {
1044 SubStream *s = &m->substream[substr];
1045 init_get_bits(&gb, buf, substream_data_len[substr] * 8);
1046
75428fa4
RP
1047 m->matrix_changed = 0;
1048 memset(m->filter_changed, 0, sizeof(m->filter_changed));
1049
b517af05
RP
1050 s->blockpos = 0;
1051 do {
1052 if (get_bits1(&gb)) {
1053 if (get_bits1(&gb)) {
9906a2be 1054 /* A restart header should be present. */
b517af05
RP
1055 if (read_restart_header(m, &gb, buf, substr) < 0)
1056 goto next_substr;
1057 s->restart_seen = 1;
1058 }
1059
f95f6ab9 1060 if (!s->restart_seen)
b517af05 1061 goto next_substr;
b517af05
RP
1062 if (read_decoding_params(m, &gb, substr) < 0)
1063 goto next_substr;
1064 }
1065
f95f6ab9 1066 if (!s->restart_seen)
b517af05 1067 goto next_substr;
b517af05
RP
1068
1069 if (read_block_data(m, &gb, substr) < 0)
1070 return -1;
1071
d7952be3
RP
1072 if (get_bits_count(&gb) >= substream_data_len[substr] * 8)
1073 goto substream_length_mismatch;
1074
1075 } while (!get_bits1(&gb));
b517af05
RP
1076
1077 skip_bits(&gb, (-get_bits_count(&gb)) & 15);
f95f6ab9 1078
7b18e13a
RP
1079 if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 32) {
1080 int shorten_by;
1081
1082 if (get_bits(&gb, 16) != 0xD234)
1083 return -1;
1084
1085 shorten_by = get_bits(&gb, 16);
1086 if (m->avctx->codec_id == CODEC_ID_TRUEHD && shorten_by & 0x2000)
1087 s->blockpos -= FFMIN(shorten_by & 0x1FFF, s->blockpos);
1088 else if (m->avctx->codec_id == CODEC_ID_MLP && shorten_by != 0xD234)
1089 return -1;
1090
b517af05 1091 if (substr == m->max_decoded_substream)
9906a2be 1092 av_log(m->avctx, AV_LOG_INFO, "End of stream indicated.\n");
b517af05 1093 }
f95f6ab9 1094
ab79fa44 1095 if (substream_parity_present[substr]) {
b517af05
RP
1096 uint8_t parity, checksum;
1097
ab79fa44
RP
1098 if (substream_data_len[substr] * 8 - get_bits_count(&gb) != 16)
1099 goto substream_length_mismatch;
1100
d544dcdf
RP
1101 parity = ff_mlp_calculate_parity(buf, substream_data_len[substr] - 2);
1102 checksum = ff_mlp_checksum8 (buf, substream_data_len[substr] - 2);
b517af05 1103
d544dcdf
RP
1104 if ((get_bits(&gb, 8) ^ parity) != 0xa9 )
1105 av_log(m->avctx, AV_LOG_ERROR, "Substream %d parity check failed.\n", substr);
1106 if ( get_bits(&gb, 8) != checksum)
1107 av_log(m->avctx, AV_LOG_ERROR, "Substream %d checksum failed.\n" , substr);
b517af05 1108 }
f95f6ab9
RP
1109
1110 if (substream_data_len[substr] * 8 != get_bits_count(&gb))
d7952be3 1111 goto substream_length_mismatch;
b517af05
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1112
1113next_substr:
f95f6ab9 1114 if (!s->restart_seen)
01aaf092
RP
1115 av_log(m->avctx, AV_LOG_ERROR,
1116 "No restart header present in substream %d.\n", substr);
01aaf092 1117
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RP
1118 buf += substream_data_len[substr];
1119 }
1120
1121 rematrix_channels(m, m->max_decoded_substream);
1122
1123 if (output_data(m, m->max_decoded_substream, data, data_size) < 0)
1124 return -1;
1125
1126 return length;
1127
d7952be3
RP
1128substream_length_mismatch:
1129 av_log(m->avctx, AV_LOG_ERROR, "substream %d length mismatch\n", substr);
1130 return -1;
1131
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RP
1132error:
1133 m->params_valid = 0;
1134 return -1;
1135}
1136
9ba4821d 1137#if CONFIG_MLP_DECODER
b517af05
RP
1138AVCodec mlp_decoder = {
1139 "mlp",
1140 CODEC_TYPE_AUDIO,
1141 CODEC_ID_MLP,
1142 sizeof(MLPDecodeContext),
1143 mlp_decode_init,
1144 NULL,
1145 NULL,
1146 read_access_unit,
9ba4821d 1147 .long_name = NULL_IF_CONFIG_SMALL("MLP (Meridian Lossless Packing)"),
b517af05 1148};
9ba4821d 1149#endif /* CONFIG_MLP_DECODER */
b517af05 1150
9ba4821d
RP
1151#if CONFIG_TRUEHD_DECODER
1152AVCodec truehd_decoder = {
1153 "truehd",
1154 CODEC_TYPE_AUDIO,
1155 CODEC_ID_TRUEHD,
1156 sizeof(MLPDecodeContext),
1157 mlp_decode_init,
1158 NULL,
1159 NULL,
1160 read_access_unit,
1161 .long_name = NULL_IF_CONFIG_SMALL("TrueHD"),
1162};
1163#endif /* CONFIG_TRUEHD_DECODER */