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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 | /** | ||
23 | * @file | ||
24 | * MLP decoder | ||
25 | */ | ||
26 | |||
27 | #include "config_components.h" | ||
28 | |||
29 | #include <stdint.h> | ||
30 | |||
31 | #include "avcodec.h" | ||
32 | #include "libavutil/internal.h" | ||
33 | #include "libavutil/intreadwrite.h" | ||
34 | #include "libavutil/channel_layout.h" | ||
35 | #include "libavutil/mem_internal.h" | ||
36 | #include "libavutil/thread.h" | ||
37 | #include "libavutil/opt.h" | ||
38 | #include "codec_internal.h" | ||
39 | #include "decode.h" | ||
40 | #include "get_bits.h" | ||
41 | #include "mlp_parse.h" | ||
42 | #include "mlpdsp.h" | ||
43 | #include "mlp.h" | ||
44 | #include "config.h" | ||
45 | #include "profiles.h" | ||
46 | |||
47 | /** number of bits used for VLC lookup - longest Huffman code is 9 */ | ||
48 | #if ARCH_ARM | ||
49 | #define VLC_BITS 5 | ||
50 | #define VLC_STATIC_SIZE 64 | ||
51 | #else | ||
52 | #define VLC_BITS 9 | ||
53 | #define VLC_STATIC_SIZE 512 | ||
54 | #endif | ||
55 | |||
56 | typedef struct SubStream { | ||
57 | /// Set if a valid restart header has been read. Otherwise the substream cannot be decoded. | ||
58 | uint8_t restart_seen; | ||
59 | /// Set if end of stream is encountered | ||
60 | uint8_t end_of_stream; | ||
61 | |||
62 | //@{ | ||
63 | /** restart header data */ | ||
64 | /// The type of noise to be used in the rematrix stage. | ||
65 | uint16_t noise_type; | ||
66 | |||
67 | /// The index of the first channel coded in this substream. | ||
68 | uint8_t min_channel; | ||
69 | /// The index of the last channel coded in this substream. | ||
70 | uint8_t max_channel; | ||
71 | /// The coded channels mask in this substream. | ||
72 | uint64_t coded_channels; | ||
73 | /// The number of channels input into the rematrix stage. | ||
74 | uint8_t max_matrix_channel; | ||
75 | /// For each channel output by the matrix, the output channel to map it to | ||
76 | uint8_t ch_assign[MAX_CHANNELS]; | ||
77 | /// The channel layout for this substream | ||
78 | uint64_t mask; | ||
79 | /// The matrix encoding mode for this substream | ||
80 | enum AVMatrixEncoding matrix_encoding; | ||
81 | enum AVMatrixEncoding prev_matrix_encoding; | ||
82 | |||
83 | /// Channel coding parameters for channels in the substream | ||
84 | ChannelParams channel_params[MAX_CHANNELS]; | ||
85 | |||
86 | /// The left shift applied to random noise in 0x31ea substreams. | ||
87 | uint8_t noise_shift; | ||
88 | /// The current seed value for the pseudorandom noise generator(s). | ||
89 | uint32_t noisegen_seed; | ||
90 | |||
91 | /// Set if the substream contains extra info to check the size of VLC blocks. | ||
92 | uint8_t data_check_present; | ||
93 | |||
94 | /// Bitmask of which parameter sets are conveyed in a decoding parameter block. | ||
95 | uint8_t param_presence_flags; | ||
96 | #define PARAM_BLOCKSIZE (1 << 7) | ||
97 | #define PARAM_MATRIX (1 << 6) | ||
98 | #define PARAM_OUTSHIFT (1 << 5) | ||
99 | #define PARAM_QUANTSTEP (1 << 4) | ||
100 | #define PARAM_FIR (1 << 3) | ||
101 | #define PARAM_IIR (1 << 2) | ||
102 | #define PARAM_HUFFOFFSET (1 << 1) | ||
103 | #define PARAM_PRESENCE (1 << 0) | ||
104 | //@} | ||
105 | |||
106 | //@{ | ||
107 | /** matrix data */ | ||
108 | |||
109 | /// Number of matrices to be applied. | ||
110 | uint8_t num_primitive_matrices; | ||
111 | |||
112 | /// matrix output channel | ||
113 | uint8_t matrix_out_ch[MAX_MATRICES]; | ||
114 | |||
115 | /// Whether the LSBs of the matrix output are encoded in the bitstream. | ||
116 | uint8_t lsb_bypass[MAX_MATRICES]; | ||
117 | /// Matrix coefficients, stored as 2.14 fixed point. | ||
118 | DECLARE_ALIGNED(32, int32_t, matrix_coeff)[MAX_MATRICES][MAX_CHANNELS]; | ||
119 | /// Left shift to apply to noise values in 0x31eb substreams. | ||
120 | uint8_t matrix_noise_shift[MAX_MATRICES]; | ||
121 | //@} | ||
122 | |||
123 | /// Left shift to apply to Huffman-decoded residuals. | ||
124 | uint8_t quant_step_size[MAX_CHANNELS]; | ||
125 | |||
126 | /// number of PCM samples in current audio block | ||
127 | uint16_t blocksize; | ||
128 | /// Number of PCM samples decoded so far in this frame. | ||
129 | uint16_t blockpos; | ||
130 | |||
131 | /// Left shift to apply to decoded PCM values to get final 24-bit output. | ||
132 | int8_t output_shift[MAX_CHANNELS]; | ||
133 | |||
134 | /// Running XOR of all output samples. | ||
135 | int32_t lossless_check_data; | ||
136 | |||
137 | } SubStream; | ||
138 | |||
139 | typedef struct MLPDecodeContext { | ||
140 | const AVClass *class; | ||
141 | AVCodecContext *avctx; | ||
142 | |||
143 | AVChannelLayout downmix_layout; | ||
144 | |||
145 | /// Current access unit being read has a major sync. | ||
146 | int is_major_sync_unit; | ||
147 | |||
148 | /// Size of the major sync unit, in bytes | ||
149 | int major_sync_header_size; | ||
150 | |||
151 | /// Set if a valid major sync block has been read. Otherwise no decoding is possible. | ||
152 | uint8_t params_valid; | ||
153 | |||
154 | /// Number of substreams contained within this stream. | ||
155 | uint8_t num_substreams; | ||
156 | |||
157 | /// Which substream of substreams carry 16-channel presentation | ||
158 | uint8_t extended_substream_info; | ||
159 | |||
160 | /// Which substream of substreams carry 2/6/8-channel presentation | ||
161 | uint8_t substream_info; | ||
162 | |||
163 | /// Index of the last substream to decode - further substreams are skipped. | ||
164 | uint8_t max_decoded_substream; | ||
165 | |||
166 | /// Stream needs channel reordering to comply with FFmpeg's channel order | ||
167 | uint8_t needs_reordering; | ||
168 | |||
169 | /// number of PCM samples contained in each frame | ||
170 | int access_unit_size; | ||
171 | /// next power of two above the number of samples in each frame | ||
172 | int access_unit_size_pow2; | ||
173 | |||
174 | SubStream substream[MAX_SUBSTREAMS]; | ||
175 | |||
176 | int matrix_changed; | ||
177 | int filter_changed[MAX_CHANNELS][NUM_FILTERS]; | ||
178 | |||
179 | int8_t noise_buffer[MAX_BLOCKSIZE_POW2]; | ||
180 | int8_t bypassed_lsbs[MAX_BLOCKSIZE][MAX_CHANNELS]; | ||
181 | DECLARE_ALIGNED(32, int32_t, sample_buffer)[MAX_BLOCKSIZE][MAX_CHANNELS]; | ||
182 | |||
183 | MLPDSPContext dsp; | ||
184 | } MLPDecodeContext; | ||
185 | |||
186 | static const enum AVChannel thd_channel_order[] = { | ||
187 | AV_CHAN_FRONT_LEFT, AV_CHAN_FRONT_RIGHT, // LR | ||
188 | AV_CHAN_FRONT_CENTER, // C | ||
189 | AV_CHAN_LOW_FREQUENCY, // LFE | ||
190 | AV_CHAN_SIDE_LEFT, AV_CHAN_SIDE_RIGHT, // LRs | ||
191 | AV_CHAN_TOP_FRONT_LEFT, AV_CHAN_TOP_FRONT_RIGHT, // LRvh | ||
192 | AV_CHAN_FRONT_LEFT_OF_CENTER, AV_CHAN_FRONT_RIGHT_OF_CENTER, // LRc | ||
193 | AV_CHAN_BACK_LEFT, AV_CHAN_BACK_RIGHT, // LRrs | ||
194 | AV_CHAN_BACK_CENTER, // Cs | ||
195 | AV_CHAN_TOP_CENTER, // Ts | ||
196 | AV_CHAN_SURROUND_DIRECT_LEFT, AV_CHAN_SURROUND_DIRECT_RIGHT, // LRsd | ||
197 | AV_CHAN_WIDE_LEFT, AV_CHAN_WIDE_RIGHT, // LRw | ||
198 | AV_CHAN_TOP_FRONT_CENTER, // Cvh | ||
199 | AV_CHAN_LOW_FREQUENCY_2, // LFE2 | ||
200 | }; | ||
201 | |||
202 | 2220 | static int mlp_channel_layout_subset(AVChannelLayout *layout, uint64_t mask) | |
203 | { | ||
204 |
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2435 | return av_channel_layout_check(layout) && |
205 | 215 | av_channel_layout_subset(layout, mask) == | |
206 | 215 | av_channel_layout_subset(layout, UINT64_MAX); | |
207 | } | ||
208 | |||
209 | 3958 | static enum AVChannel thd_channel_layout_extract_channel(uint64_t channel_layout, | |
210 | int index) | ||
211 | { | ||
212 | int i; | ||
213 | |||
214 |
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3958 | if (av_popcount64(channel_layout) <= index) |
215 | ✗ | return AV_CHAN_NONE; | |
216 | |||
217 |
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11285 | for (i = 0; i < FF_ARRAY_ELEMS(thd_channel_order); i++) |
218 |
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11285 | if (channel_layout & (1ULL << thd_channel_order[i]) && !index--) |
219 | 3958 | return thd_channel_order[i]; | |
220 | ✗ | return AV_CHAN_NONE; | |
221 | } | ||
222 | |||
223 | static VLC huff_vlc[3]; | ||
224 | |||
225 | /** Initialize static data, constant between all invocations of the codec. */ | ||
226 | |||
227 | 9 | static av_cold void init_static(void) | |
228 | { | ||
229 |
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36 | for (int i = 0; i < 3; i++) { |
230 | static VLCElem vlc_buf[3 * VLC_STATIC_SIZE]; | ||
231 | 27 | huff_vlc[i].table = &vlc_buf[i * VLC_STATIC_SIZE]; | |
232 | 27 | huff_vlc[i].table_allocated = VLC_STATIC_SIZE; | |
233 | 27 | init_vlc(&huff_vlc[i], VLC_BITS, 18, | |
234 | &ff_mlp_huffman_tables[i][0][1], 2, 1, | ||
235 | &ff_mlp_huffman_tables[i][0][0], 2, 1, INIT_VLC_USE_NEW_STATIC); | ||
236 | } | ||
237 | |||
238 | 9 | ff_mlp_init_crc(); | |
239 | 9 | } | |
240 | |||
241 | 16834 | static inline int32_t calculate_sign_huff(MLPDecodeContext *m, | |
242 | unsigned int substr, unsigned int ch) | ||
243 | { | ||
244 | 16834 | SubStream *s = &m->substream[substr]; | |
245 | 16834 | ChannelParams *cp = &s->channel_params[ch]; | |
246 | 16834 | int lsb_bits = cp->huff_lsbs - s->quant_step_size[ch]; | |
247 |
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16834 | int sign_shift = lsb_bits + (cp->codebook ? 2 - cp->codebook : -1); |
248 | 16834 | int32_t sign_huff_offset = cp->huff_offset; | |
249 | |||
250 |
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16834 | if (cp->codebook > 0) |
251 | 11899 | sign_huff_offset -= 7 << lsb_bits; | |
252 | |||
253 |
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16834 | if (sign_shift >= 0) |
254 | 15281 | sign_huff_offset -= 1 << sign_shift; | |
255 | |||
256 | 16834 | return sign_huff_offset; | |
257 | } | ||
258 | |||
259 | /** Read a sample, consisting of either, both or neither of entropy-coded MSBs | ||
260 | * and plain LSBs. */ | ||
261 | |||
262 | 1121160 | static inline int read_huff_channels(MLPDecodeContext *m, GetBitContext *gbp, | |
263 | unsigned int substr, unsigned int pos) | ||
264 | { | ||
265 | 1121160 | SubStream *s = &m->substream[substr]; | |
266 | unsigned int mat, channel; | ||
267 | |||
268 |
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3175680 | for (mat = 0; mat < s->num_primitive_matrices; mat++) |
269 |
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2054520 | if (s->lsb_bypass[mat]) |
270 | ✗ | m->bypassed_lsbs[pos + s->blockpos][mat] = get_bits1(gbp); | |
271 | |||
272 |
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3855240 | for (channel = s->min_channel; channel <= s->max_channel; channel++) { |
273 | 2734080 | ChannelParams *cp = &s->channel_params[channel]; | |
274 | 2734080 | int codebook = cp->codebook; | |
275 | 2734080 | int quant_step_size = s->quant_step_size[channel]; | |
276 | 2734080 | int lsb_bits = cp->huff_lsbs - quant_step_size; | |
277 | 2734080 | int result = 0; | |
278 | |||
279 |
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2734080 | if (codebook > 0) |
280 | 2490712 | result = get_vlc2(gbp, huff_vlc[codebook-1].table, | |
281 | VLC_BITS, (9 + VLC_BITS - 1) / VLC_BITS); | ||
282 | |||
283 |
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2734080 | if (result < 0) |
284 | ✗ | return AVERROR_INVALIDDATA; | |
285 | |||
286 |
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2734080 | if (lsb_bits > 0) |
287 | 2549944 | result = (result << lsb_bits) + get_bits_long(gbp, lsb_bits); | |
288 | |||
289 | 2734080 | result += cp->sign_huff_offset; | |
290 | 2734080 | result *= 1 << quant_step_size; | |
291 | |||
292 | 2734080 | m->sample_buffer[pos + s->blockpos][channel] = result; | |
293 | } | ||
294 | |||
295 | 1121160 | return 0; | |
296 | } | ||
297 | |||
298 | 15 | static av_cold int mlp_decode_init(AVCodecContext *avctx) | |
299 | { | ||
300 | static AVOnce init_static_once = AV_ONCE_INIT; | ||
301 | 15 | MLPDecodeContext *m = avctx->priv_data; | |
302 | int substr; | ||
303 | |||
304 | 15 | m->avctx = avctx; | |
305 |
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75 | for (substr = 0; substr < MAX_SUBSTREAMS; substr++) |
306 | 60 | m->substream[substr].lossless_check_data = 0xffffffff; | |
307 | 15 | ff_mlpdsp_init(&m->dsp); | |
308 | |||
309 | #if FF_API_OLD_CHANNEL_LAYOUT | ||
310 | FF_DISABLE_DEPRECATION_WARNINGS | ||
311 |
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15 | if (avctx->request_channel_layout) { |
312 | 2 | av_channel_layout_uninit(&m->downmix_layout); | |
313 | 2 | av_channel_layout_from_mask(&m->downmix_layout, avctx->request_channel_layout); | |
314 | } | ||
315 | FF_ENABLE_DEPRECATION_WARNINGS | ||
316 | #endif | ||
317 | 15 | ff_thread_once(&init_static_once, init_static); | |
318 | |||
319 | 15 | return 0; | |
320 | } | ||
321 | |||
322 | /** Read a major sync info header - contains high level information about | ||
323 | * the stream - sample rate, channel arrangement etc. Most of this | ||
324 | * information is not actually necessary for decoding, only for playback. | ||
325 | */ | ||
326 | |||
327 | 1774 | static int read_major_sync(MLPDecodeContext *m, GetBitContext *gb) | |
328 | { | ||
329 | MLPHeaderInfo mh; | ||
330 | int substr, ret; | ||
331 | |||
332 |
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1774 | if ((ret = ff_mlp_read_major_sync(m->avctx, &mh, gb)) != 0) |
333 | ✗ | return ret; | |
334 | |||
335 |
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1774 | if (mh.group1_bits == 0) { |
336 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "invalid/unknown bits per sample\n"); | |
337 | ✗ | return AVERROR_INVALIDDATA; | |
338 | } | ||
339 |
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1774 | if (mh.group2_bits > mh.group1_bits) { |
340 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
341 | "Channel group 2 cannot have more bits per sample than group 1.\n"); | ||
342 | ✗ | return AVERROR_INVALIDDATA; | |
343 | } | ||
344 | |||
345 |
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1774 | if (mh.group2_samplerate && mh.group2_samplerate != mh.group1_samplerate) { |
346 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
347 | "Channel groups with differing sample rates are not currently supported.\n"); | ||
348 | ✗ | return AVERROR_INVALIDDATA; | |
349 | } | ||
350 | |||
351 |
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1774 | if (mh.group1_samplerate == 0) { |
352 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "invalid/unknown sampling rate\n"); | |
353 | ✗ | return AVERROR_INVALIDDATA; | |
354 | } | ||
355 |
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1774 | if (mh.group1_samplerate > MAX_SAMPLERATE) { |
356 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
357 | "Sampling rate %d is greater than the supported maximum (%d).\n", | ||
358 | mh.group1_samplerate, MAX_SAMPLERATE); | ||
359 | ✗ | return AVERROR_INVALIDDATA; | |
360 | } | ||
361 |
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1774 | if (mh.access_unit_size > MAX_BLOCKSIZE) { |
362 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
363 | "Block size %d is greater than the supported maximum (%d).\n", | ||
364 | mh.access_unit_size, MAX_BLOCKSIZE); | ||
365 | ✗ | return AVERROR_INVALIDDATA; | |
366 | } | ||
367 |
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1774 | if (mh.access_unit_size_pow2 > MAX_BLOCKSIZE_POW2) { |
368 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
369 | "Block size pow2 %d is greater than the supported maximum (%d).\n", | ||
370 | mh.access_unit_size_pow2, MAX_BLOCKSIZE_POW2); | ||
371 | ✗ | return AVERROR_INVALIDDATA; | |
372 | } | ||
373 | |||
374 |
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1774 | if (mh.num_substreams == 0) |
375 | ✗ | return AVERROR_INVALIDDATA; | |
376 |
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1774 | if (m->avctx->codec_id == AV_CODEC_ID_MLP && mh.num_substreams > 2) { |
377 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "MLP only supports up to 2 substreams.\n"); | |
378 | ✗ | return AVERROR_INVALIDDATA; | |
379 | } | ||
380 |
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1774 | if (mh.num_substreams > MAX_SUBSTREAMS) { |
381 | ✗ | avpriv_request_sample(m->avctx, | |
382 | "%d substreams (more than the " | ||
383 | "maximum supported by the decoder)", | ||
384 | mh.num_substreams); | ||
385 | ✗ | return AVERROR_PATCHWELCOME; | |
386 | } | ||
387 | |||
388 | 1774 | m->major_sync_header_size = mh.header_size; | |
389 | |||
390 | 1774 | m->access_unit_size = mh.access_unit_size; | |
391 | 1774 | m->access_unit_size_pow2 = mh.access_unit_size_pow2; | |
392 | |||
393 | 1774 | m->num_substreams = mh.num_substreams; | |
394 | 1774 | m->substream_info = mh.substream_info; | |
395 | |||
396 | /* If there is a 4th substream and the MSB of substream_info is set, | ||
397 | * there is a 16-channel spatial presentation (Atmos in TrueHD). | ||
398 | */ | ||
399 |
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1774 | if (m->avctx->codec_id == AV_CODEC_ID_TRUEHD |
400 |
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657 | && m->num_substreams == 4 && m->substream_info >> 7 == 1) { |
401 | 4 | m->avctx->profile = FF_PROFILE_TRUEHD_ATMOS; | |
402 | } | ||
403 | |||
404 | /* limit to decoding 3 substreams, as the 4th is used by Dolby Atmos for non-audio data */ | ||
405 | 1774 | m->max_decoded_substream = FFMIN(m->num_substreams - 1, 2); | |
406 | |||
407 | 1774 | m->avctx->sample_rate = mh.group1_samplerate; | |
408 | 1774 | m->avctx->frame_size = mh.access_unit_size; | |
409 | |||
410 | 1774 | m->avctx->bits_per_raw_sample = mh.group1_bits; | |
411 |
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1774 | if (mh.group1_bits > 16) |
412 | 657 | m->avctx->sample_fmt = AV_SAMPLE_FMT_S32; | |
413 | else | ||
414 | 1117 | m->avctx->sample_fmt = AV_SAMPLE_FMT_S16; | |
415 | 3548 | m->dsp.mlp_pack_output = m->dsp.mlp_select_pack_output(m->substream[m->max_decoded_substream].ch_assign, | |
416 | 1774 | m->substream[m->max_decoded_substream].output_shift, | |
417 | 1774 | m->substream[m->max_decoded_substream].max_matrix_channel, | |
418 | 1774 | m->avctx->sample_fmt == AV_SAMPLE_FMT_S32); | |
419 | |||
420 | 1774 | m->params_valid = 1; | |
421 |
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8870 | for (substr = 0; substr < MAX_SUBSTREAMS; substr++) |
422 | 7096 | m->substream[substr].restart_seen = 0; | |
423 | |||
424 | /* Set the layout for each substream. When there's more than one, the first | ||
425 | * substream is Stereo. Subsequent substreams' layouts are indicated in the | ||
426 | * major sync. */ | ||
427 |
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1774 | if (m->avctx->codec_id == AV_CODEC_ID_MLP) { |
428 |
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1117 | if (mh.stream_type != SYNC_MLP) { |
429 | ✗ | avpriv_request_sample(m->avctx, | |
430 | "unexpected stream_type %X in MLP", | ||
431 | mh.stream_type); | ||
432 | ✗ | return AVERROR_PATCHWELCOME; | |
433 | } | ||
434 |
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1117 | if ((substr = (mh.num_substreams > 1))) |
435 | ✗ | m->substream[0].mask = AV_CH_LAYOUT_STEREO; | |
436 | 1117 | m->substream[substr].mask = mh.channel_layout_mlp; | |
437 | } else { | ||
438 |
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657 | if (mh.stream_type != SYNC_TRUEHD) { |
439 | ✗ | avpriv_request_sample(m->avctx, | |
440 | "unexpected stream_type %X in !MLP", | ||
441 | mh.stream_type); | ||
442 | ✗ | return AVERROR_PATCHWELCOME; | |
443 | } | ||
444 | 657 | m->substream[1].mask = mh.channel_layout_thd_stream1; | |
445 |
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657 | if (mh.channels_thd_stream1 == 2 && |
446 | ✗ | mh.channels_thd_stream2 == 2 && | |
447 | ✗ | m->avctx->ch_layout.nb_channels == 2) | |
448 | ✗ | m->substream[0].mask = AV_CH_LAYOUT_STEREO; | |
449 |
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657 | if ((substr = (mh.num_substreams > 1))) |
450 | 657 | m->substream[0].mask = AV_CH_LAYOUT_STEREO; | |
451 |
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657 | if (mh.num_substreams == 1 && |
452 | ✗ | mh.channels_thd_stream1 == 1 && | |
453 | ✗ | mh.channels_thd_stream2 == 1 && | |
454 | ✗ | m->avctx->ch_layout.nb_channels == 1) | |
455 | ✗ | m->substream[0].mask = AV_CH_LAYOUT_MONO; | |
456 |
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657 | if (mh.num_substreams > 2) |
457 |
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4 | if (mh.channel_layout_thd_stream2) |
458 | 4 | m->substream[2].mask = mh.channel_layout_thd_stream2; | |
459 | else | ||
460 | ✗ | m->substream[2].mask = mh.channel_layout_thd_stream1; | |
461 |
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657 | if (m->avctx->ch_layout.nb_channels > 2) |
462 | 435 | m->substream[mh.num_substreams > 1].mask = mh.channel_layout_thd_stream1; | |
463 | } | ||
464 | |||
465 |
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1774 | m->needs_reordering = mh.channel_arrangement >= 18 && mh.channel_arrangement <= 20; |
466 | |||
467 | /* Parse the TrueHD decoder channel modifiers and set each substream's | ||
468 | * AVMatrixEncoding accordingly. | ||
469 | * | ||
470 | * The meaning of the modifiers depends on the channel layout: | ||
471 | * | ||
472 | * - THD_CH_MODIFIER_LTRT, THD_CH_MODIFIER_LBINRBIN only apply to 2-channel | ||
473 | * | ||
474 | * - THD_CH_MODIFIER_MONO applies to 1-channel or 2-channel (dual mono) | ||
475 | * | ||
476 | * - THD_CH_MODIFIER_SURROUNDEX, THD_CH_MODIFIER_NOTSURROUNDEX only apply to | ||
477 | * layouts with an Ls/Rs channel pair | ||
478 | */ | ||
479 |
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8870 | for (substr = 0; substr < MAX_SUBSTREAMS; substr++) |
480 | 7096 | m->substream[substr].matrix_encoding = AV_MATRIX_ENCODING_NONE; | |
481 |
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1774 | if (m->avctx->codec_id == AV_CODEC_ID_TRUEHD) { |
482 |
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657 | if (mh.num_substreams > 2 && |
483 |
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4 | mh.channel_layout_thd_stream2 & AV_CH_SIDE_LEFT && |
484 |
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4 | mh.channel_layout_thd_stream2 & AV_CH_SIDE_RIGHT && |
485 |
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4 | mh.channel_modifier_thd_stream2 == THD_CH_MODIFIER_SURROUNDEX) |
486 | ✗ | m->substream[2].matrix_encoding = AV_MATRIX_ENCODING_DOLBYEX; | |
487 | |||
488 |
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657 | if (mh.num_substreams > 1 && |
489 |
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657 | mh.channel_layout_thd_stream1 & AV_CH_SIDE_LEFT && |
490 |
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649 | mh.channel_layout_thd_stream1 & AV_CH_SIDE_RIGHT && |
491 |
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649 | mh.channel_modifier_thd_stream1 == THD_CH_MODIFIER_SURROUNDEX) |
492 | 4 | m->substream[1].matrix_encoding = AV_MATRIX_ENCODING_DOLBYEX; | |
493 | |||
494 |
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657 | if (mh.num_substreams > 0) |
495 |
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657 | switch (mh.channel_modifier_thd_stream0) { |
496 | 4 | case THD_CH_MODIFIER_LTRT: | |
497 | 4 | m->substream[0].matrix_encoding = AV_MATRIX_ENCODING_DOLBY; | |
498 | 4 | break; | |
499 | ✗ | case THD_CH_MODIFIER_LBINRBIN: | |
500 | ✗ | m->substream[0].matrix_encoding = AV_MATRIX_ENCODING_DOLBYHEADPHONE; | |
501 | ✗ | break; | |
502 | 653 | default: | |
503 | 653 | break; | |
504 | } | ||
505 | } | ||
506 | |||
507 | 1774 | return 0; | |
508 | } | ||
509 | |||
510 | /** Read a restart header from a block in a substream. This contains parameters | ||
511 | * required to decode the audio that do not change very often. Generally | ||
512 | * (always) present only in blocks following a major sync. */ | ||
513 | |||
514 | 2220 | static int read_restart_header(MLPDecodeContext *m, GetBitContext *gbp, | |
515 | const uint8_t *buf, unsigned int substr) | ||
516 | { | ||
517 | 2220 | SubStream *s = &m->substream[substr]; | |
518 | unsigned int ch; | ||
519 | int sync_word, tmp; | ||
520 | uint8_t checksum; | ||
521 | uint8_t lossless_check; | ||
522 | 2220 | int start_count = get_bits_count(gbp); | |
523 | int min_channel, max_channel, max_matrix_channel, noise_type; | ||
524 | 4440 | const int std_max_matrix_channel = m->avctx->codec_id == AV_CODEC_ID_MLP | |
525 | ? MAX_MATRIX_CHANNEL_MLP | ||
526 |
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2220 | : MAX_MATRIX_CHANNEL_TRUEHD; |
527 | |||
528 | 2220 | sync_word = get_bits(gbp, 13); | |
529 | |||
530 |
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2220 | if (sync_word != 0x31ea >> 1) { |
531 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
532 | "restart header sync incorrect (got 0x%04x)\n", sync_word); | ||
533 | ✗ | return AVERROR_INVALIDDATA; | |
534 | } | ||
535 | |||
536 | 2220 | noise_type = get_bits1(gbp); | |
537 | |||
538 |
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2220 | if (m->avctx->codec_id == AV_CODEC_ID_MLP && noise_type) { |
539 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "MLP must have 0x31ea sync word.\n"); | |
540 | ✗ | return AVERROR_INVALIDDATA; | |
541 | } | ||
542 | |||
543 | 2220 | skip_bits(gbp, 16); /* Output timestamp */ | |
544 | |||
545 | 2220 | min_channel = get_bits(gbp, 4); | |
546 | 2220 | max_channel = get_bits(gbp, 4); | |
547 | 2220 | max_matrix_channel = get_bits(gbp, 4); | |
548 | |||
549 |
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2220 | if (max_matrix_channel > std_max_matrix_channel) { |
550 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
551 | "Max matrix channel cannot be greater than %d.\n", | ||
552 | std_max_matrix_channel); | ||
553 | ✗ | return AVERROR_INVALIDDATA; | |
554 | } | ||
555 | |||
556 | /* This should happen for TrueHD streams with >6 channels and MLP's noise | ||
557 | * type. It is not yet known if this is allowed. */ | ||
558 |
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2220 | if (max_matrix_channel > MAX_MATRIX_CHANNEL_MLP && !noise_type) { |
559 | ✗ | avpriv_request_sample(m->avctx, | |
560 | "%d channels (more than the " | ||
561 | "maximum supported by the decoder)", | ||
562 | max_channel + 2); | ||
563 | ✗ | return AVERROR_PATCHWELCOME; | |
564 | } | ||
565 | |||
566 |
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2220 | if (max_channel + 1 > MAX_CHANNELS || max_channel + 1 < min_channel) |
567 | ✗ | return AVERROR_INVALIDDATA; | |
568 | |||
569 | 2220 | s->min_channel = min_channel; | |
570 | 2220 | s->max_channel = max_channel; | |
571 | 2220 | s->coded_channels = ((1LL << (max_channel - min_channel + 1)) - 1) << min_channel; | |
572 | 2220 | s->max_matrix_channel = max_matrix_channel; | |
573 | 2220 | s->noise_type = noise_type; | |
574 | |||
575 |
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2220 | if (mlp_channel_layout_subset(&m->downmix_layout, s->mask) && |
576 |
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215 | m->max_decoded_substream > substr) { |
577 | 215 | av_log(m->avctx, AV_LOG_DEBUG, | |
578 | "Extracting %d-channel downmix (0x%"PRIx64") from substream %d. " | ||
579 | "Further substreams will be skipped.\n", | ||
580 | 215 | s->max_channel + 1, s->mask, substr); | |
581 | 215 | m->max_decoded_substream = substr; | |
582 | } | ||
583 | |||
584 | 2220 | s->noise_shift = get_bits(gbp, 4); | |
585 | 2220 | s->noisegen_seed = get_bits(gbp, 23); | |
586 | |||
587 | 2220 | skip_bits(gbp, 19); | |
588 | |||
589 | 2220 | s->data_check_present = get_bits1(gbp); | |
590 | 2220 | lossless_check = get_bits(gbp, 8); | |
591 |
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2220 | if (substr == m->max_decoded_substream |
592 |
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1774 | && s->lossless_check_data != 0xffffffff) { |
593 | 1759 | tmp = xor_32_to_8(s->lossless_check_data); | |
594 |
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1759 | if (tmp != lossless_check) |
595 | ✗ | av_log(m->avctx, AV_LOG_WARNING, | |
596 | "Lossless check failed - expected %02x, calculated %02x.\n", | ||
597 | lossless_check, tmp); | ||
598 | } | ||
599 | |||
600 | 2220 | skip_bits(gbp, 16); | |
601 | |||
602 | 2220 | memset(s->ch_assign, 0, sizeof(s->ch_assign)); | |
603 | |||
604 |
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8412 | for (ch = 0; ch <= s->max_matrix_channel; ch++) { |
605 | 6192 | int ch_assign = get_bits(gbp, 6); | |
606 |
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6192 | if (m->avctx->codec_id == AV_CODEC_ID_TRUEHD) { |
607 | AVChannelLayout l; | ||
608 | 3958 | enum AVChannel channel = thd_channel_layout_extract_channel(s->mask, ch_assign); | |
609 | |||
610 | 3958 | av_channel_layout_from_mask(&l, s->mask); | |
611 | 3958 | ch_assign = av_channel_layout_index_from_channel(&l, channel); | |
612 | } | ||
613 |
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6192 | if (ch_assign < 0 || ch_assign > s->max_matrix_channel) { |
614 | ✗ | avpriv_request_sample(m->avctx, | |
615 | "Assignment of matrix channel %d to invalid output channel %d", | ||
616 | ch, ch_assign); | ||
617 | ✗ | return AVERROR_PATCHWELCOME; | |
618 | } | ||
619 | 6192 | s->ch_assign[ch_assign] = ch; | |
620 | } | ||
621 | |||
622 | 2220 | checksum = ff_mlp_restart_checksum(buf, get_bits_count(gbp) - start_count); | |
623 | |||
624 |
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2220 | if (checksum != get_bits(gbp, 8)) |
625 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "restart header checksum error\n"); | |
626 | |||
627 | /* Set default decoding parameters. */ | ||
628 | 2220 | s->param_presence_flags = 0xff; | |
629 | 2220 | s->num_primitive_matrices = 0; | |
630 | 2220 | s->blocksize = 8; | |
631 | 2220 | s->lossless_check_data = 0; | |
632 | |||
633 | 2220 | memset(s->output_shift , 0, sizeof(s->output_shift )); | |
634 | 2220 | memset(s->quant_step_size, 0, sizeof(s->quant_step_size)); | |
635 | |||
636 |
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7512 | for (ch = s->min_channel; ch <= s->max_channel; ch++) { |
637 | 5292 | ChannelParams *cp = &s->channel_params[ch]; | |
638 | 5292 | cp->filter_params[FIR].order = 0; | |
639 | 5292 | cp->filter_params[IIR].order = 0; | |
640 | 5292 | cp->filter_params[FIR].shift = 0; | |
641 | 5292 | cp->filter_params[IIR].shift = 0; | |
642 | |||
643 | /* Default audio coding is 24-bit raw PCM. */ | ||
644 | 5292 | cp->huff_offset = 0; | |
645 | 5292 | cp->sign_huff_offset = -(1 << 23); | |
646 | 5292 | cp->codebook = 0; | |
647 | 5292 | cp->huff_lsbs = 24; | |
648 | } | ||
649 | |||
650 |
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2220 | if (substr == m->max_decoded_substream) { |
651 | 1774 | av_channel_layout_uninit(&m->avctx->ch_layout); | |
652 | 1774 | av_channel_layout_from_mask(&m->avctx->ch_layout, s->mask); | |
653 | 3548 | m->dsp.mlp_pack_output = m->dsp.mlp_select_pack_output(s->ch_assign, | |
654 | 1774 | s->output_shift, | |
655 | 1774 | s->max_matrix_channel, | |
656 | 1774 | m->avctx->sample_fmt == AV_SAMPLE_FMT_S32); | |
657 | |||
658 |
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1774 | if (m->avctx->codec_id == AV_CODEC_ID_MLP && m->needs_reordering) { |
659 | ✗ | if (s->mask == (AV_CH_LAYOUT_QUAD|AV_CH_LOW_FREQUENCY) || | |
660 | ✗ | s->mask == AV_CH_LAYOUT_5POINT0_BACK) { | |
661 | ✗ | int i = s->ch_assign[4]; | |
662 | ✗ | s->ch_assign[4] = s->ch_assign[3]; | |
663 | ✗ | s->ch_assign[3] = s->ch_assign[2]; | |
664 | ✗ | s->ch_assign[2] = i; | |
665 | ✗ | } else if (s->mask == AV_CH_LAYOUT_5POINT1_BACK) { | |
666 | ✗ | FFSWAP(int, s->ch_assign[2], s->ch_assign[4]); | |
667 | ✗ | FFSWAP(int, s->ch_assign[3], s->ch_assign[5]); | |
668 | } | ||
669 | } | ||
670 | |||
671 | } | ||
672 | |||
673 | 2220 | return 0; | |
674 | } | ||
675 | |||
676 | /** Read parameters for one of the prediction filters. */ | ||
677 | |||
678 | 5829 | static int read_filter_params(MLPDecodeContext *m, GetBitContext *gbp, | |
679 | unsigned int substr, unsigned int channel, | ||
680 | unsigned int filter) | ||
681 | { | ||
682 | 5829 | SubStream *s = &m->substream[substr]; | |
683 | 5829 | FilterParams *fp = &s->channel_params[channel].filter_params[filter]; | |
684 |
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5829 | const int max_order = filter ? MAX_IIR_ORDER : MAX_FIR_ORDER; |
685 |
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5829 | const char fchar = filter ? 'I' : 'F'; |
686 | int i, order; | ||
687 | |||
688 | // Filter is 0 for FIR, 1 for IIR. | ||
689 |
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5829 | av_assert0(filter < 2); |
690 | |||
691 |
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5829 | if (m->filter_changed[channel][filter]++ > 1) { |
692 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "Filters may change only once per access unit.\n"); | |
693 | ✗ | return AVERROR_INVALIDDATA; | |
694 | } | ||
695 | |||
696 | 5829 | order = get_bits(gbp, 4); | |
697 |
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5829 | if (order > max_order) { |
698 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
699 | "%cIR filter order %d is greater than maximum %d.\n", | ||
700 | fchar, order, max_order); | ||
701 | ✗ | return AVERROR_INVALIDDATA; | |
702 | } | ||
703 | 5829 | fp->order = order; | |
704 | |||
705 |
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5829 | if (order > 0) { |
706 | 5824 | int32_t *fcoeff = s->channel_params[channel].coeff[filter]; | |
707 | int coeff_bits, coeff_shift; | ||
708 | |||
709 | 5824 | fp->shift = get_bits(gbp, 4); | |
710 | |||
711 | 5824 | coeff_bits = get_bits(gbp, 5); | |
712 | 5824 | coeff_shift = get_bits(gbp, 3); | |
713 |
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5824 | if (coeff_bits < 1 || coeff_bits > 16) { |
714 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
715 | "%cIR filter coeff_bits must be between 1 and 16.\n", | ||
716 | fchar); | ||
717 | ✗ | return AVERROR_INVALIDDATA; | |
718 | } | ||
719 |
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5824 | if (coeff_bits + coeff_shift > 16) { |
720 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
721 | "Sum of coeff_bits and coeff_shift for %cIR filter must be 16 or less.\n", | ||
722 | fchar); | ||
723 | ✗ | return AVERROR_INVALIDDATA; | |
724 | } | ||
725 | |||
726 |
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30083 | for (i = 0; i < order; i++) |
727 | 24259 | fcoeff[i] = get_sbits(gbp, coeff_bits) * (1 << coeff_shift); | |
728 | |||
729 |
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5824 | if (get_bits1(gbp)) { |
730 | int state_bits, state_shift; | ||
731 | |||
732 |
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|
525 | if (filter == FIR) { |
733 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
734 | "FIR filter has state data specified.\n"); | ||
735 | ✗ | return AVERROR_INVALIDDATA; | |
736 | } | ||
737 | |||
738 | 525 | state_bits = get_bits(gbp, 4); | |
739 | 525 | state_shift = get_bits(gbp, 4); | |
740 | |||
741 | /* TODO: Check validity of state data. */ | ||
742 | |||
743 |
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1497 | for (i = 0; i < order; i++) |
744 |
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972 | fp->state[i] = state_bits ? get_sbits(gbp, state_bits) * (1 << state_shift) : 0; |
745 | } | ||
746 | } | ||
747 | |||
748 | 5829 | return 0; | |
749 | } | ||
750 | |||
751 | /** Read parameters for primitive matrices. */ | ||
752 | |||
753 | 1927 | static int read_matrix_params(MLPDecodeContext *m, unsigned int substr, GetBitContext *gbp) | |
754 | { | ||
755 | 1927 | SubStream *s = &m->substream[substr]; | |
756 | unsigned int mat, ch; | ||
757 | 3854 | const int max_primitive_matrices = m->avctx->codec_id == AV_CODEC_ID_MLP | |
758 | ? MAX_MATRICES_MLP | ||
759 |
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1927 | : MAX_MATRICES_TRUEHD; |
760 | |||
761 |
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1927 | if (m->matrix_changed++ > 1) { |
762 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "Matrices may change only once per access unit.\n"); | |
763 | ✗ | return AVERROR_INVALIDDATA; | |
764 | } | ||
765 | |||
766 | 1927 | s->num_primitive_matrices = get_bits(gbp, 4); | |
767 | |||
768 |
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1927 | if (s->num_primitive_matrices > max_primitive_matrices) { |
769 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
770 | "Number of primitive matrices cannot be greater than %d.\n", | ||
771 | max_primitive_matrices); | ||
772 | ✗ | goto error; | |
773 | } | ||
774 | |||
775 |
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|
5421 | for (mat = 0; mat < s->num_primitive_matrices; mat++) { |
776 | int frac_bits, max_chan; | ||
777 | 3494 | s->matrix_out_ch[mat] = get_bits(gbp, 4); | |
778 | 3494 | frac_bits = get_bits(gbp, 4); | |
779 | 3494 | s->lsb_bypass [mat] = get_bits1(gbp); | |
780 | |||
781 |
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|
3494 | if (s->matrix_out_ch[mat] > s->max_matrix_channel) { |
782 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
783 | "Invalid channel %d specified as output from matrix.\n", | ||
784 | ✗ | s->matrix_out_ch[mat]); | |
785 | ✗ | goto error; | |
786 | } | ||
787 |
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|
3494 | if (frac_bits > 14) { |
788 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
789 | "Too many fractional bits specified.\n"); | ||
790 | ✗ | goto error; | |
791 | } | ||
792 | |||
793 | 3494 | max_chan = s->max_matrix_channel; | |
794 |
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|
3494 | if (!s->noise_type) |
795 | 2146 | max_chan+=2; | |
796 | |||
797 |
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|
20230 | for (ch = 0; ch <= max_chan; ch++) { |
798 | 16736 | int coeff_val = 0; | |
799 |
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|
16736 | if (get_bits1(gbp)) |
800 | 9693 | coeff_val = get_sbits(gbp, frac_bits + 2); | |
801 | |||
802 | 16736 | s->matrix_coeff[mat][ch] = coeff_val * (1 << (14 - frac_bits)); | |
803 | } | ||
804 | |||
805 |
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|
3494 | if (s->noise_type) |
806 | 1348 | s->matrix_noise_shift[mat] = get_bits(gbp, 4); | |
807 | else | ||
808 | 2146 | s->matrix_noise_shift[mat] = 0; | |
809 | } | ||
810 | |||
811 | 1927 | return 0; | |
812 | ✗ | error: | |
813 | ✗ | s->num_primitive_matrices = 0; | |
814 | ✗ | memset(s->matrix_out_ch, 0, sizeof(s->matrix_out_ch)); | |
815 | |||
816 | ✗ | return AVERROR_INVALIDDATA; | |
817 | } | ||
818 | |||
819 | /** Read channel parameters. */ | ||
820 | |||
821 | 15911 | static int read_channel_params(MLPDecodeContext *m, unsigned int substr, | |
822 | GetBitContext *gbp, unsigned int ch) | ||
823 | { | ||
824 | 15911 | SubStream *s = &m->substream[substr]; | |
825 | 15911 | ChannelParams *cp = &s->channel_params[ch]; | |
826 | 15911 | FilterParams *fir = &cp->filter_params[FIR]; | |
827 | 15911 | FilterParams *iir = &cp->filter_params[IIR]; | |
828 | int ret; | ||
829 | |||
830 |
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|
15911 | if (s->param_presence_flags & PARAM_FIR) |
831 |
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|
15911 | if (get_bits1(gbp)) |
832 |
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|
5304 | if ((ret = read_filter_params(m, gbp, substr, ch, FIR)) < 0) |
833 | ✗ | return ret; | |
834 | |||
835 |
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|
15911 | if (s->param_presence_flags & PARAM_IIR) |
836 |
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|
15911 | if (get_bits1(gbp)) |
837 |
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|
525 | if ((ret = read_filter_params(m, gbp, substr, ch, IIR)) < 0) |
838 | ✗ | return ret; | |
839 | |||
840 |
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|
15911 | if (fir->order + iir->order > 8) { |
841 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "Total filter orders too high.\n"); | |
842 | ✗ | return AVERROR_INVALIDDATA; | |
843 | } | ||
844 | |||
845 |
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|
15911 | if (fir->order && iir->order && |
846 |
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|
990 | fir->shift != iir->shift) { |
847 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
848 | "FIR and IIR filters must use the same precision.\n"); | ||
849 | ✗ | return AVERROR_INVALIDDATA; | |
850 | } | ||
851 | /* The FIR and IIR filters must have the same precision. | ||
852 | * To simplify the filtering code, only the precision of the | ||
853 | * FIR filter is considered. If only the IIR filter is employed, | ||
854 | * the FIR filter precision is set to that of the IIR filter, so | ||
855 | * that the filtering code can use it. */ | ||
856 |
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|
15911 | if (!fir->order && iir->order) |
857 | ✗ | fir->shift = iir->shift; | |
858 | |||
859 |
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|
15911 | if (s->param_presence_flags & PARAM_HUFFOFFSET) |
860 |
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|
15911 | if (get_bits1(gbp)) |
861 | 3516 | cp->huff_offset = get_sbits(gbp, 15); | |
862 | |||
863 | 15911 | cp->codebook = get_bits(gbp, 2); | |
864 | 15911 | cp->huff_lsbs = get_bits(gbp, 5); | |
865 | |||
866 |
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|
15911 | if (cp->codebook > 0 && cp->huff_lsbs > 24) { |
867 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "Invalid huff_lsbs.\n"); | |
868 | ✗ | cp->huff_lsbs = 0; | |
869 | ✗ | return AVERROR_INVALIDDATA; | |
870 | } | ||
871 | |||
872 | 15911 | return 0; | |
873 | } | ||
874 | |||
875 | /** Read decoding parameters that change more often than those in the restart | ||
876 | * header. */ | ||
877 | |||
878 | 16036 | static int read_decoding_params(MLPDecodeContext *m, GetBitContext *gbp, | |
879 | unsigned int substr) | ||
880 | { | ||
881 | 16036 | SubStream *s = &m->substream[substr]; | |
882 | unsigned int ch; | ||
883 | 16036 | int ret = 0; | |
884 | 16036 | unsigned recompute_sho = 0; | |
885 | |||
886 |
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|
16036 | if (s->param_presence_flags & PARAM_PRESENCE) |
887 |
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✓ Branch 2 taken 16036 times.
|
16036 | if (get_bits1(gbp)) |
888 | ✗ | s->param_presence_flags = get_bits(gbp, 8); | |
889 | |||
890 |
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|
16036 | if (s->param_presence_flags & PARAM_BLOCKSIZE) |
891 |
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|
16036 | if (get_bits1(gbp)) { |
892 | 4422 | s->blocksize = get_bits(gbp, 9); | |
893 |
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|
4422 | if (s->blocksize < 8 || s->blocksize > m->access_unit_size) { |
894 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "Invalid blocksize.\n"); | |
895 | ✗ | s->blocksize = 0; | |
896 | ✗ | return AVERROR_INVALIDDATA; | |
897 | } | ||
898 | } | ||
899 | |||
900 |
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|
16036 | if (s->param_presence_flags & PARAM_MATRIX) |
901 |
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|
16036 | if (get_bits1(gbp)) |
902 |
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|
1927 | if ((ret = read_matrix_params(m, substr, gbp)) < 0) |
903 | ✗ | return ret; | |
904 | |||
905 |
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|
16036 | if (s->param_presence_flags & PARAM_OUTSHIFT) |
906 |
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|
16036 | if (get_bits1(gbp)) { |
907 |
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|
5961 | for (ch = 0; ch <= s->max_matrix_channel; ch++) { |
908 | 4558 | s->output_shift[ch] = get_sbits(gbp, 4); | |
909 |
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|
4558 | if (s->output_shift[ch] < 0) { |
910 | ✗ | avpriv_request_sample(m->avctx, "Negative output_shift"); | |
911 | ✗ | s->output_shift[ch] = 0; | |
912 | } | ||
913 | } | ||
914 |
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✓ Branch 1 taken 32 times.
|
1403 | if (substr == m->max_decoded_substream) |
915 | 1371 | m->dsp.mlp_pack_output = m->dsp.mlp_select_pack_output(s->ch_assign, | |
916 | 1371 | s->output_shift, | |
917 | 1371 | s->max_matrix_channel, | |
918 | 1371 | m->avctx->sample_fmt == AV_SAMPLE_FMT_S32); | |
919 | } | ||
920 | |||
921 |
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|
16036 | if (s->param_presence_flags & PARAM_QUANTSTEP) |
922 |
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|
16036 | if (get_bits1(gbp)) |
923 |
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|
8428 | for (ch = 0; ch <= s->max_channel; ch++) { |
924 | 6192 | s->quant_step_size[ch] = get_bits(gbp, 4); | |
925 | |||
926 | 6192 | recompute_sho |= 1<<ch; | |
927 | } | ||
928 | |||
929 |
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|
54116 | for (ch = s->min_channel; ch <= s->max_channel; ch++) |
930 |
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✓ Branch 2 taken 22169 times.
|
38080 | if (get_bits1(gbp)) { |
931 | 15911 | recompute_sho |= 1<<ch; | |
932 |
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✓ Branch 2 taken 15911 times.
|
15911 | if ((ret = read_channel_params(m, substr, gbp, ch)) < 0) |
933 | ✗ | goto fail; | |
934 | } | ||
935 | |||
936 | |||
937 | 16036 | fail: | |
938 |
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✓ Branch 1 taken 16036 times.
|
60418 | for (ch = 0; ch <= s->max_channel; ch++) { |
939 |
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✓ Branch 1 taken 27548 times.
|
44382 | if (recompute_sho & (1<<ch)) { |
940 | 16834 | ChannelParams *cp = &s->channel_params[ch]; | |
941 | |||
942 |
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|
16834 | if (cp->codebook > 0 && cp->huff_lsbs < s->quant_step_size[ch]) { |
943 | ✗ | if (ret >= 0) { | |
944 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "quant_step_size larger than huff_lsbs\n"); | |
945 | ✗ | ret = AVERROR_INVALIDDATA; | |
946 | } | ||
947 | ✗ | s->quant_step_size[ch] = 0; | |
948 | } | ||
949 | |||
950 | 16834 | cp->sign_huff_offset = calculate_sign_huff(m, substr, ch); | |
951 | } | ||
952 | } | ||
953 | 16036 | return ret; | |
954 | } | ||
955 | |||
956 | #define MSB_MASK(bits) (-(1 << (bits))) | ||
957 | |||
958 | /** Generate PCM samples using the prediction filters and residual values | ||
959 | * read from the data stream, and update the filter state. */ | ||
960 | |||
961 | 73644 | static void filter_channel(MLPDecodeContext *m, unsigned int substr, | |
962 | unsigned int channel) | ||
963 | { | ||
964 | 73644 | SubStream *s = &m->substream[substr]; | |
965 | 73644 | const int32_t *fircoeff = s->channel_params[channel].coeff[FIR]; | |
966 | int32_t state_buffer[NUM_FILTERS][MAX_BLOCKSIZE + MAX_FIR_ORDER]; | ||
967 | 73644 | int32_t *firbuf = state_buffer[FIR] + MAX_BLOCKSIZE; | |
968 | 73644 | int32_t *iirbuf = state_buffer[IIR] + MAX_BLOCKSIZE; | |
969 | 73644 | FilterParams *fir = &s->channel_params[channel].filter_params[FIR]; | |
970 | 73644 | FilterParams *iir = &s->channel_params[channel].filter_params[IIR]; | |
971 | 73644 | unsigned int filter_shift = fir->shift; | |
972 | 73644 | int32_t mask = MSB_MASK(s->quant_step_size[channel]); | |
973 | |||
974 | 73644 | memcpy(firbuf, fir->state, MAX_FIR_ORDER * sizeof(int32_t)); | |
975 | 73644 | memcpy(iirbuf, iir->state, MAX_IIR_ORDER * sizeof(int32_t)); | |
976 | |||
977 | 73644 | m->dsp.mlp_filter_channel(firbuf, fircoeff, | |
978 | 73644 | fir->order, iir->order, | |
979 | 73644 | filter_shift, mask, s->blocksize, | |
980 | 73644 | &m->sample_buffer[s->blockpos][channel]); | |
981 | |||
982 | 73644 | memcpy(fir->state, firbuf - s->blocksize, MAX_FIR_ORDER * sizeof(int32_t)); | |
983 | 73644 | memcpy(iir->state, iirbuf - s->blocksize, MAX_IIR_ORDER * sizeof(int32_t)); | |
984 | 73644 | } | |
985 | |||
986 | /** Read a block of PCM residual data (or actual if no filtering active). */ | ||
987 | |||
988 | 30249 | static int read_block_data(MLPDecodeContext *m, GetBitContext *gbp, | |
989 | unsigned int substr) | ||
990 | { | ||
991 | 30249 | SubStream *s = &m->substream[substr]; | |
992 | 30249 | unsigned int i, ch, expected_stream_pos = 0; | |
993 | int ret; | ||
994 | |||
995 |
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✓ Branch 1 taken 30249 times.
|
30249 | if (s->data_check_present) { |
996 | ✗ | expected_stream_pos = get_bits_count(gbp); | |
997 | ✗ | expected_stream_pos += get_bits(gbp, 16); | |
998 | ✗ | avpriv_request_sample(m->avctx, | |
999 | "Substreams with VLC block size check info"); | ||
1000 | } | ||
1001 | |||
1002 |
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✓ Branch 1 taken 30249 times.
|
30249 | if (s->blockpos + s->blocksize > m->access_unit_size) { |
1003 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "too many audio samples in frame\n"); | |
1004 | ✗ | return AVERROR_INVALIDDATA; | |
1005 | } | ||
1006 | |||
1007 | 30249 | memset(&m->bypassed_lsbs[s->blockpos][0], 0, | |
1008 | 30249 | s->blocksize * sizeof(m->bypassed_lsbs[0])); | |
1009 | |||
1010 |
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|
1151409 | for (i = 0; i < s->blocksize; i++) |
1011 |
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|
1121160 | if ((ret = read_huff_channels(m, gbp, substr, i)) < 0) |
1012 | ✗ | return ret; | |
1013 | |||
1014 |
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|
103893 | for (ch = s->min_channel; ch <= s->max_channel; ch++) |
1015 | 73644 | filter_channel(m, substr, ch); | |
1016 | |||
1017 | 30249 | s->blockpos += s->blocksize; | |
1018 | |||
1019 |
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✓ Branch 1 taken 30249 times.
|
30249 | if (s->data_check_present) { |
1020 | ✗ | if (get_bits_count(gbp) != expected_stream_pos) | |
1021 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "block data length mismatch\n"); | |
1022 | ✗ | skip_bits(gbp, 8); | |
1023 | } | ||
1024 | |||
1025 | 30249 | return 0; | |
1026 | } | ||
1027 | |||
1028 | /** Data table used for TrueHD noise generation function. */ | ||
1029 | |||
1030 | static const int8_t noise_table[256] = { | ||
1031 | 30, 51, 22, 54, 3, 7, -4, 38, 14, 55, 46, 81, 22, 58, -3, 2, | ||
1032 | 52, 31, -7, 51, 15, 44, 74, 30, 85, -17, 10, 33, 18, 80, 28, 62, | ||
1033 | 10, 32, 23, 69, 72, 26, 35, 17, 73, 60, 8, 56, 2, 6, -2, -5, | ||
1034 | 51, 4, 11, 50, 66, 76, 21, 44, 33, 47, 1, 26, 64, 48, 57, 40, | ||
1035 | 38, 16, -10, -28, 92, 22, -18, 29, -10, 5, -13, 49, 19, 24, 70, 34, | ||
1036 | 61, 48, 30, 14, -6, 25, 58, 33, 42, 60, 67, 17, 54, 17, 22, 30, | ||
1037 | 67, 44, -9, 50, -11, 43, 40, 32, 59, 82, 13, 49, -14, 55, 60, 36, | ||
1038 | 48, 49, 31, 47, 15, 12, 4, 65, 1, 23, 29, 39, 45, -2, 84, 69, | ||
1039 | 0, 72, 37, 57, 27, 41, -15, -16, 35, 31, 14, 61, 24, 0, 27, 24, | ||
1040 | 16, 41, 55, 34, 53, 9, 56, 12, 25, 29, 53, 5, 20, -20, -8, 20, | ||
1041 | 13, 28, -3, 78, 38, 16, 11, 62, 46, 29, 21, 24, 46, 65, 43, -23, | ||
1042 | 89, 18, 74, 21, 38, -12, 19, 12, -19, 8, 15, 33, 4, 57, 9, -8, | ||
1043 | 36, 35, 26, 28, 7, 83, 63, 79, 75, 11, 3, 87, 37, 47, 34, 40, | ||
1044 | 39, 19, 20, 42, 27, 34, 39, 77, 13, 42, 59, 64, 45, -1, 32, 37, | ||
1045 | 45, -5, 53, -6, 7, 36, 50, 23, 6, 32, 9, -21, 18, 71, 27, 52, | ||
1046 | -25, 31, 35, 42, -1, 68, 63, 52, 26, 43, 66, 37, 41, 25, 40, 70, | ||
1047 | }; | ||
1048 | |||
1049 | /** Noise generation functions. | ||
1050 | * I'm not sure what these are for - they seem to be some kind of pseudorandom | ||
1051 | * sequence generators, used to generate noise data which is used when the | ||
1052 | * channels are rematrixed. I'm not sure if they provide a practical benefit | ||
1053 | * to compression, or just obfuscate the decoder. Are they for some kind of | ||
1054 | * dithering? */ | ||
1055 | |||
1056 | /** Generate two channels of noise, used in the matrix when | ||
1057 | * restart sync word == 0x31ea. */ | ||
1058 | |||
1059 | 12380 | static void generate_2_noise_channels(MLPDecodeContext *m, unsigned int substr) | |
1060 | { | ||
1061 | 12380 | SubStream *s = &m->substream[substr]; | |
1062 | unsigned int i; | ||
1063 | 12380 | uint32_t seed = s->noisegen_seed; | |
1064 | 12380 | unsigned int maxchan = s->max_matrix_channel; | |
1065 | |||
1066 |
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|
507580 | for (i = 0; i < s->blockpos; i++) { |
1067 | 495200 | uint16_t seed_shr7 = seed >> 7; | |
1068 | 495200 | m->sample_buffer[i][maxchan+1] = ((int8_t)(seed >> 15)) * (1 << s->noise_shift); | |
1069 | 495200 | m->sample_buffer[i][maxchan+2] = ((int8_t) seed_shr7) * (1 << s->noise_shift); | |
1070 | |||
1071 | 495200 | seed = (seed << 16) ^ seed_shr7 ^ (seed_shr7 << 5); | |
1072 | } | ||
1073 | |||
1074 | 12380 | s->noisegen_seed = seed; | |
1075 | 12380 | } | |
1076 | |||
1077 | /** Generate a block of noise, used when restart sync word == 0x31eb. */ | ||
1078 | |||
1079 | 7759 | static void fill_noise_buffer(MLPDecodeContext *m, unsigned int substr) | |
1080 | { | ||
1081 | 7759 | SubStream *s = &m->substream[substr]; | |
1082 | unsigned int i; | ||
1083 | 7759 | uint32_t seed = s->noisegen_seed; | |
1084 | |||
1085 |
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|
504335 | for (i = 0; i < m->access_unit_size_pow2; i++) { |
1086 | 496576 | uint8_t seed_shr15 = seed >> 15; | |
1087 | 496576 | m->noise_buffer[i] = noise_table[seed_shr15]; | |
1088 | 496576 | seed = (seed << 8) ^ seed_shr15 ^ (seed_shr15 << 5); | |
1089 | } | ||
1090 | |||
1091 | 7759 | s->noisegen_seed = seed; | |
1092 | 7759 | } | |
1093 | |||
1094 | /** Write the audio data into the output buffer. */ | ||
1095 | |||
1096 | 20139 | static int output_data(MLPDecodeContext *m, unsigned int substr, | |
1097 | AVFrame *frame, int *got_frame_ptr) | ||
1098 | { | ||
1099 | 20139 | AVCodecContext *avctx = m->avctx; | |
1100 | 20139 | SubStream *s = &m->substream[substr]; | |
1101 | unsigned int mat; | ||
1102 | unsigned int maxchan; | ||
1103 | int ret; | ||
1104 | 20139 | int is32 = (m->avctx->sample_fmt == AV_SAMPLE_FMT_S32); | |
1105 | |||
1106 |
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✓ Branch 1 taken 20139 times.
|
20139 | if (m->avctx->ch_layout.nb_channels != s->max_matrix_channel + 1) { |
1107 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "channel count mismatch\n"); | |
1108 | ✗ | return AVERROR_INVALIDDATA; | |
1109 | } | ||
1110 | |||
1111 |
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|
20139 | if (!s->blockpos) { |
1112 | ✗ | av_log(avctx, AV_LOG_ERROR, "No samples to output.\n"); | |
1113 | ✗ | return AVERROR_INVALIDDATA; | |
1114 | } | ||
1115 | |||
1116 | 20139 | maxchan = s->max_matrix_channel; | |
1117 |
2/2✓ Branch 0 taken 12380 times.
✓ Branch 1 taken 7759 times.
|
20139 | if (!s->noise_type) { |
1118 | 12380 | generate_2_noise_channels(m, substr); | |
1119 | 12380 | maxchan += 2; | |
1120 | } else { | ||
1121 | 7759 | fill_noise_buffer(m, substr); | |
1122 | } | ||
1123 | |||
1124 | /* Apply the channel matrices in turn to reconstruct the original audio | ||
1125 | * samples. */ | ||
1126 |
2/2✓ Branch 0 taken 35059 times.
✓ Branch 1 taken 20139 times.
|
55198 | for (mat = 0; mat < s->num_primitive_matrices; mat++) { |
1127 | 35059 | unsigned int dest_ch = s->matrix_out_ch[mat]; | |
1128 | 35059 | m->dsp.mlp_rematrix_channel(&m->sample_buffer[0][0], | |
1129 | 35059 | s->matrix_coeff[mat], | |
1130 | 35059 | &m->bypassed_lsbs[0][mat], | |
1131 | 35059 | m->noise_buffer, | |
1132 | 35059 | s->num_primitive_matrices - mat, | |
1133 | dest_ch, | ||
1134 | 35059 | s->blockpos, | |
1135 | maxchan, | ||
1136 | 35059 | s->matrix_noise_shift[mat], | |
1137 | m->access_unit_size_pow2, | ||
1138 | 35059 | MSB_MASK(s->quant_step_size[dest_ch])); | |
1139 | } | ||
1140 | |||
1141 | /* get output buffer */ | ||
1142 | 20139 | frame->nb_samples = s->blockpos; | |
1143 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 20139 times.
|
20139 | if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) |
1144 | ✗ | return ret; | |
1145 | 40278 | s->lossless_check_data = m->dsp.mlp_pack_output(s->lossless_check_data, | |
1146 | 20139 | s->blockpos, | |
1147 | 20139 | m->sample_buffer, | |
1148 | 20139 | frame->data[0], | |
1149 | 20139 | s->ch_assign, | |
1150 | 20139 | s->output_shift, | |
1151 | 20139 | s->max_matrix_channel, | |
1152 | is32); | ||
1153 | |||
1154 | /* Update matrix encoding side data */ | ||
1155 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 20139 times.
|
20139 | if (s->matrix_encoding != s->prev_matrix_encoding) { |
1156 | ✗ | if ((ret = ff_side_data_update_matrix_encoding(frame, s->matrix_encoding)) < 0) | |
1157 | ✗ | return ret; | |
1158 | |||
1159 | ✗ | s->prev_matrix_encoding = s->matrix_encoding; | |
1160 | } | ||
1161 | |||
1162 | 20139 | *got_frame_ptr = 1; | |
1163 | |||
1164 | 20139 | return 0; | |
1165 | } | ||
1166 | |||
1167 | /** Read an access unit from the stream. | ||
1168 | * @return negative on error, 0 if not enough data is present in the input stream, | ||
1169 | * otherwise the number of bytes consumed. */ | ||
1170 | |||
1171 | 20139 | static int read_access_unit(AVCodecContext *avctx, AVFrame *frame, | |
1172 | int *got_frame_ptr, AVPacket *avpkt) | ||
1173 | { | ||
1174 | 20139 | const uint8_t *buf = avpkt->data; | |
1175 | 20139 | int buf_size = avpkt->size; | |
1176 | 20139 | MLPDecodeContext *m = avctx->priv_data; | |
1177 | GetBitContext gb; | ||
1178 | unsigned int length, substr; | ||
1179 | unsigned int substream_start; | ||
1180 | 20139 | unsigned int header_size = 4; | |
1181 | 20139 | unsigned int substr_header_size = 0; | |
1182 | uint8_t substream_parity_present[MAX_SUBSTREAMS]; | ||
1183 | uint16_t substream_data_len[MAX_SUBSTREAMS]; | ||
1184 | uint8_t parity_bits; | ||
1185 | int ret; | ||
1186 | |||
1187 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 20139 times.
|
20139 | if (buf_size < 4) |
1188 | ✗ | return AVERROR_INVALIDDATA; | |
1189 | |||
1190 | 20139 | length = (AV_RB16(buf) & 0xfff) * 2; | |
1191 | |||
1192 |
2/4✓ Branch 0 taken 20139 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 20139 times.
|
20139 | if (length < 4 || length > buf_size) |
1193 | ✗ | return AVERROR_INVALIDDATA; | |
1194 | |||
1195 | 20139 | init_get_bits(&gb, (buf + 4), (length - 4) * 8); | |
1196 | |||
1197 | 20139 | m->is_major_sync_unit = 0; | |
1198 |
2/2✓ Branch 1 taken 1774 times.
✓ Branch 2 taken 18365 times.
|
20139 | if (show_bits_long(&gb, 31) == (0xf8726fba >> 1)) { |
1199 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 1774 times.
|
1774 | if (read_major_sync(m, &gb) < 0) |
1200 | ✗ | goto error; | |
1201 | 1774 | m->is_major_sync_unit = 1; | |
1202 | 1774 | header_size += m->major_sync_header_size; | |
1203 | } | ||
1204 | |||
1205 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 20139 times.
|
20139 | if (!m->params_valid) { |
1206 | ✗ | av_log(m->avctx, AV_LOG_WARNING, | |
1207 | "Stream parameters not seen; skipping frame.\n"); | ||
1208 | ✗ | *got_frame_ptr = 0; | |
1209 | ✗ | return length; | |
1210 | } | ||
1211 | |||
1212 | 20139 | substream_start = 0; | |
1213 | |||
1214 |
2/2✓ Branch 0 taken 31571 times.
✓ Branch 1 taken 20139 times.
|
51710 | for (substr = 0; substr < m->num_substreams; substr++) { |
1215 | int extraword_present, checkdata_present, end, nonrestart_substr; | ||
1216 | |||
1217 | 31571 | extraword_present = get_bits1(&gb); | |
1218 | 31571 | nonrestart_substr = get_bits1(&gb); | |
1219 | 31571 | checkdata_present = get_bits1(&gb); | |
1220 | 31571 | skip_bits1(&gb); | |
1221 | |||
1222 | 31571 | end = get_bits(&gb, 12) * 2; | |
1223 | |||
1224 | 31571 | substr_header_size += 2; | |
1225 | |||
1226 |
2/2✓ Branch 0 taken 176 times.
✓ Branch 1 taken 31395 times.
|
31571 | if (extraword_present) { |
1227 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 176 times.
|
176 | if (m->avctx->codec_id == AV_CODEC_ID_MLP) { |
1228 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "There must be no extraword for MLP.\n"); | |
1229 | ✗ | goto error; | |
1230 | } | ||
1231 | 176 | skip_bits(&gb, 16); | |
1232 | 176 | substr_header_size += 2; | |
1233 | } | ||
1234 | |||
1235 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 31571 times.
|
31571 | if (length < header_size + substr_header_size) { |
1236 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "Insufficient data for headers\n"); | |
1237 | ✗ | goto error; | |
1238 | } | ||
1239 | |||
1240 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 31571 times.
|
31571 | if (!(nonrestart_substr ^ m->is_major_sync_unit)) { |
1241 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "Invalid nonrestart_substr.\n"); | |
1242 | ✗ | goto error; | |
1243 | } | ||
1244 | |||
1245 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 31571 times.
|
31571 | if (end + header_size + substr_header_size > length) { |
1246 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
1247 | "Indicated length of substream %d data goes off end of " | ||
1248 | "packet.\n", substr); | ||
1249 | ✗ | end = length - header_size - substr_header_size; | |
1250 | } | ||
1251 | |||
1252 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 31571 times.
|
31571 | if (end < substream_start) { |
1253 | ✗ | av_log(avctx, AV_LOG_ERROR, | |
1254 | "Indicated end offset of substream %d data " | ||
1255 | "is smaller than calculated start offset.\n", | ||
1256 | substr); | ||
1257 | ✗ | goto error; | |
1258 | } | ||
1259 | |||
1260 |
2/2✓ Branch 0 taken 3327 times.
✓ Branch 1 taken 28244 times.
|
31571 | if (substr > m->max_decoded_substream) |
1261 | 3327 | continue; | |
1262 | |||
1263 | 28244 | substream_parity_present[substr] = checkdata_present; | |
1264 | 28244 | substream_data_len[substr] = end - substream_start; | |
1265 | 28244 | substream_start = end; | |
1266 | } | ||
1267 | |||
1268 | 20139 | parity_bits = ff_mlp_calculate_parity(buf, 4); | |
1269 | 20139 | parity_bits ^= ff_mlp_calculate_parity(buf + header_size, substr_header_size); | |
1270 | |||
1271 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 20139 times.
|
20139 | if ((((parity_bits >> 4) ^ parity_bits) & 0xF) != 0xF) { |
1272 | ✗ | av_log(avctx, AV_LOG_ERROR, "Parity check failed.\n"); | |
1273 | ✗ | goto error; | |
1274 | } | ||
1275 | |||
1276 | 20139 | buf += header_size + substr_header_size; | |
1277 | |||
1278 |
2/2✓ Branch 0 taken 28029 times.
✓ Branch 1 taken 20139 times.
|
48168 | for (substr = 0; substr <= m->max_decoded_substream; substr++) { |
1279 | 28029 | SubStream *s = &m->substream[substr]; | |
1280 | |||
1281 | 28029 | init_get_bits(&gb, buf, substream_data_len[substr] * 8); | |
1282 | |||
1283 | 28029 | m->matrix_changed = 0; | |
1284 | 28029 | memset(m->filter_changed, 0, sizeof(m->filter_changed)); | |
1285 | |||
1286 | 28029 | s->blockpos = 0; | |
1287 | do { | ||
1288 |
2/2✓ Branch 1 taken 16036 times.
✓ Branch 2 taken 14213 times.
|
30249 | if (get_bits1(&gb)) { |
1289 |
2/2✓ Branch 1 taken 2220 times.
✓ Branch 2 taken 13816 times.
|
16036 | if (get_bits1(&gb)) { |
1290 | /* A restart header should be present. */ | ||
1291 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 2220 times.
|
2220 | if (read_restart_header(m, &gb, buf, substr) < 0) |
1292 | ✗ | goto next_substr; | |
1293 | 2220 | s->restart_seen = 1; | |
1294 | } | ||
1295 | |||
1296 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 16036 times.
|
16036 | if (!s->restart_seen) |
1297 | ✗ | goto next_substr; | |
1298 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 16036 times.
|
16036 | if (read_decoding_params(m, &gb, substr) < 0) |
1299 | ✗ | goto next_substr; | |
1300 | } | ||
1301 | |||
1302 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 30249 times.
|
30249 | if (!s->restart_seen) |
1303 | ✗ | goto next_substr; | |
1304 | |||
1305 |
2/2✓ Branch 0 taken 14504 times.
✓ Branch 1 taken 15745 times.
|
30249 | if (((avctx->ch_layout.nb_channels == 6 && |
1306 |
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✗ Branch 1 not taken.
|
14504 | ((m->substream_info >> 2) & 0x3) != 0x3) || |
1307 |
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✓ Branch 1 taken 29844 times.
|
30249 | (avctx->ch_layout.nb_channels == 8 && |
1308 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 405 times.
|
405 | ((m->substream_info >> 4) & 0x7) != 0x7 && |
1309 | ✗ | ((m->substream_info >> 4) & 0x7) != 0x6 && | |
1310 | ✗ | ((m->substream_info >> 4) & 0x7) != 0x3)) && | |
1311 | ✗ | substr > 0 && substr < m->max_decoded_substream && | |
1312 | ✗ | (s->min_channel <= m->substream[substr - 1].max_channel)) { | |
1313 | ✗ | av_log(avctx, AV_LOG_DEBUG, | |
1314 | "Previous substream(%d) channels overlaps current substream(%d) channels, skipping.\n", | ||
1315 | substr - 1, substr); | ||
1316 | ✗ | goto next_substr; | |
1317 | } | ||
1318 | |||
1319 |
2/2✓ Branch 0 taken 8336 times.
✓ Branch 1 taken 21913 times.
|
30249 | if (substr != m->max_decoded_substream && |
1320 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 8336 times.
|
8336 | ((s->coded_channels & m->substream[m->max_decoded_substream].coded_channels) != 0)) { |
1321 | ✗ | av_log(avctx, AV_LOG_DEBUG, | |
1322 | "Current substream(%d) channels overlaps final substream(%d) channels, skipping.\n", | ||
1323 | ✗ | substr, m->max_decoded_substream); | |
1324 | ✗ | goto next_substr; | |
1325 | } | ||
1326 | |||
1327 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 30249 times.
|
30249 | if ((ret = read_block_data(m, &gb, substr)) < 0) |
1328 | ✗ | return ret; | |
1329 | |||
1330 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 30249 times.
|
30249 | if (get_bits_count(&gb) >= substream_data_len[substr] * 8) |
1331 | ✗ | goto substream_length_mismatch; | |
1332 | |||
1333 |
2/2✓ Branch 1 taken 2220 times.
✓ Branch 2 taken 28029 times.
|
30249 | } while (!get_bits1(&gb)); |
1334 | |||
1335 | 28029 | skip_bits(&gb, (-get_bits_count(&gb)) & 15); | |
1336 | |||
1337 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 28029 times.
|
28029 | if (substream_data_len[substr] * 8 - get_bits_count(&gb) >= 32) { |
1338 | int shorten_by; | ||
1339 | |||
1340 | ✗ | if (get_bits(&gb, 16) != 0xD234) | |
1341 | ✗ | return AVERROR_INVALIDDATA; | |
1342 | |||
1343 | ✗ | shorten_by = get_bits(&gb, 16); | |
1344 | ✗ | if (m->avctx->codec_id == AV_CODEC_ID_TRUEHD && shorten_by & 0x2000) | |
1345 | ✗ | s->blockpos -= FFMIN(shorten_by & 0x1FFF, s->blockpos); | |
1346 | ✗ | else if (m->avctx->codec_id == AV_CODEC_ID_MLP && shorten_by != 0xD234) | |
1347 | ✗ | return AVERROR_INVALIDDATA; | |
1348 | |||
1349 | ✗ | av_log(m->avctx, AV_LOG_DEBUG, "End of stream indicated.\n"); | |
1350 | ✗ | s->end_of_stream = 1; | |
1351 | } | ||
1352 | |||
1353 |
1/2✓ Branch 0 taken 28029 times.
✗ Branch 1 not taken.
|
28029 | if (substream_parity_present[substr]) { |
1354 | uint8_t parity, checksum; | ||
1355 | |||
1356 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 28029 times.
|
28029 | if (substream_data_len[substr] * 8 - get_bits_count(&gb) != 16) |
1357 | ✗ | goto substream_length_mismatch; | |
1358 | |||
1359 | 28029 | parity = ff_mlp_calculate_parity(buf, substream_data_len[substr] - 2); | |
1360 | 28029 | checksum = ff_mlp_checksum8 (buf, substream_data_len[substr] - 2); | |
1361 | |||
1362 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 28029 times.
|
28029 | if ((get_bits(&gb, 8) ^ parity) != 0xa9 ) |
1363 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "Substream %d parity check failed.\n", substr); | |
1364 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 28029 times.
|
28029 | if ( get_bits(&gb, 8) != checksum) |
1365 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "Substream %d checksum failed.\n" , substr); | |
1366 | } | ||
1367 | |||
1368 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 28029 times.
|
28029 | if (substream_data_len[substr] * 8 != get_bits_count(&gb)) |
1369 | ✗ | goto substream_length_mismatch; | |
1370 | |||
1371 | 28029 | next_substr: | |
1372 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 28029 times.
|
28029 | if (!s->restart_seen) |
1373 | ✗ | av_log(m->avctx, AV_LOG_ERROR, | |
1374 | "No restart header present in substream %d.\n", substr); | ||
1375 | |||
1376 | 28029 | buf += substream_data_len[substr]; | |
1377 | } | ||
1378 | |||
1379 |
1/2✗ Branch 1 not taken.
✓ Branch 2 taken 20139 times.
|
20139 | if ((ret = output_data(m, m->max_decoded_substream, frame, got_frame_ptr)) < 0) |
1380 | ✗ | return ret; | |
1381 | |||
1382 |
2/2✓ Branch 0 taken 28029 times.
✓ Branch 1 taken 20139 times.
|
48168 | for (substr = 0; substr <= m->max_decoded_substream; substr++){ |
1383 | 28029 | SubStream *s = &m->substream[substr]; | |
1384 | |||
1385 |
1/2✗ Branch 0 not taken.
✓ Branch 1 taken 28029 times.
|
28029 | if (s->end_of_stream) { |
1386 | ✗ | s->lossless_check_data = 0xffffffff; | |
1387 | ✗ | s->end_of_stream = 0; | |
1388 | ✗ | m->params_valid = 0; | |
1389 | } | ||
1390 | } | ||
1391 | |||
1392 | 20139 | return length; | |
1393 | |||
1394 | ✗ | substream_length_mismatch: | |
1395 | ✗ | av_log(m->avctx, AV_LOG_ERROR, "substream %d length mismatch\n", substr); | |
1396 | ✗ | return AVERROR_INVALIDDATA; | |
1397 | |||
1398 | ✗ | error: | |
1399 | ✗ | m->params_valid = 0; | |
1400 | ✗ | return AVERROR_INVALIDDATA; | |
1401 | } | ||
1402 | |||
1403 | ✗ | static void mlp_decode_flush(AVCodecContext *avctx) | |
1404 | { | ||
1405 | ✗ | MLPDecodeContext *m = avctx->priv_data; | |
1406 | |||
1407 | ✗ | m->params_valid = 0; | |
1408 | ✗ | for (int substr = 0; substr <= m->max_decoded_substream; substr++){ | |
1409 | ✗ | SubStream *s = &m->substream[substr]; | |
1410 | |||
1411 | ✗ | s->lossless_check_data = 0xffffffff; | |
1412 | ✗ | s->prev_matrix_encoding = 0; | |
1413 | } | ||
1414 | } | ||
1415 | |||
1416 | #define OFFSET(x) offsetof(MLPDecodeContext, x) | ||
1417 | #define FLAGS (AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_AUDIO_PARAM) | ||
1418 | static const AVOption options[] = { | ||
1419 | { "downmix", "Request a specific channel layout from the decoder", OFFSET(downmix_layout), | ||
1420 | AV_OPT_TYPE_CHLAYOUT, {.str = NULL}, .flags = FLAGS }, | ||
1421 | { NULL }, | ||
1422 | }; | ||
1423 | |||
1424 | static const AVClass mlp_decoder_class = { | ||
1425 | .class_name = "MLP decoder", | ||
1426 | .item_name = av_default_item_name, | ||
1427 | .option = options, | ||
1428 | .version = LIBAVUTIL_VERSION_INT, | ||
1429 | }; | ||
1430 | |||
1431 | static const AVClass truehd_decoder_class = { | ||
1432 | .class_name = "TrueHD decoder", | ||
1433 | .item_name = av_default_item_name, | ||
1434 | .option = options, | ||
1435 | .version = LIBAVUTIL_VERSION_INT, | ||
1436 | }; | ||
1437 | |||
1438 | #if CONFIG_MLP_DECODER | ||
1439 | const FFCodec ff_mlp_decoder = { | ||
1440 | .p.name = "mlp", | ||
1441 | CODEC_LONG_NAME("MLP (Meridian Lossless Packing)"), | ||
1442 | .p.type = AVMEDIA_TYPE_AUDIO, | ||
1443 | .p.id = AV_CODEC_ID_MLP, | ||
1444 | .priv_data_size = sizeof(MLPDecodeContext), | ||
1445 | .p.priv_class = &mlp_decoder_class, | ||
1446 | .init = mlp_decode_init, | ||
1447 | FF_CODEC_DECODE_CB(read_access_unit), | ||
1448 | .flush = mlp_decode_flush, | ||
1449 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF, | ||
1450 | }; | ||
1451 | #endif | ||
1452 | #if CONFIG_TRUEHD_DECODER | ||
1453 | const FFCodec ff_truehd_decoder = { | ||
1454 | .p.name = "truehd", | ||
1455 | CODEC_LONG_NAME("TrueHD"), | ||
1456 | .p.type = AVMEDIA_TYPE_AUDIO, | ||
1457 | .p.id = AV_CODEC_ID_TRUEHD, | ||
1458 | .priv_data_size = sizeof(MLPDecodeContext), | ||
1459 | .p.priv_class = &truehd_decoder_class, | ||
1460 | .init = mlp_decode_init, | ||
1461 | FF_CODEC_DECODE_CB(read_access_unit), | ||
1462 | .flush = mlp_decode_flush, | ||
1463 | .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_CHANNEL_CONF, | ||
1464 | .p.profiles = NULL_IF_CONFIG_SMALL(ff_truehd_profiles), | ||
1465 | }; | ||
1466 | #endif /* CONFIG_TRUEHD_DECODER */ | ||
1467 |