FFmpeg coverage

Directory: ../../../ffmpeg/
File: src/libavcodec/adpcm.c
Date: 2021-09-23 20:34:37
Exec Total Coverage
Lines: 551 720 76.5%
Branches: 447 668 66.9%
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1 /*
2 * Copyright (c) 2001-2003 The FFmpeg project
3 *
4 * first version by Francois Revol (revol@free.fr)
5 * fringe ADPCM codecs (e.g., DK3, DK4, Westwood)
6 * by Mike Melanson (melanson@pcisys.net)
7 * CD-ROM XA ADPCM codec by BERO
8 * EA ADPCM decoder by Robin Kay (komadori@myrealbox.com)
9 * EA ADPCM R1/R2/R3 decoder by Peter Ross (pross@xvid.org)
10 * EA IMA EACS decoder by Peter Ross (pross@xvid.org)
11 * EA IMA SEAD decoder by Peter Ross (pross@xvid.org)
12 * EA ADPCM XAS decoder by Peter Ross (pross@xvid.org)
13 * MAXIS EA ADPCM decoder by Robert Marston (rmarston@gmail.com)
14 * THP ADPCM decoder by Marco Gerards (mgerards@xs4all.nl)
15 * Argonaut Games ADPCM decoder by Zane van Iperen (zane@zanevaniperen.com)
16 * Simon & Schuster Interactive ADPCM decoder by Zane van Iperen (zane@zanevaniperen.com)
17 * Ubisoft ADPCM decoder by Zane van Iperen (zane@zanevaniperen.com)
18 * High Voltage Software ALP decoder by Zane van Iperen (zane@zanevaniperen.com)
19 * Cunning Developments decoder by Zane van Iperen (zane@zanevaniperen.com)
20 *
21 * This file is part of FFmpeg.
22 *
23 * FFmpeg is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU Lesser General Public
25 * License as published by the Free Software Foundation; either
26 * version 2.1 of the License, or (at your option) any later version.
27 *
28 * FFmpeg is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * Lesser General Public License for more details.
32 *
33 * You should have received a copy of the GNU Lesser General Public
34 * License along with FFmpeg; if not, write to the Free Software
35 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
36 */
37 #include "avcodec.h"
38 #include "get_bits.h"
39 #include "bytestream.h"
40 #include "adpcm.h"
41 #include "adpcm_data.h"
42 #include "internal.h"
43
44 /**
45 * @file
46 * ADPCM decoders
47 * Features and limitations:
48 *
49 * Reference documents:
50 * http://wiki.multimedia.cx/index.php?title=Category:ADPCM_Audio_Codecs
51 * http://www.pcisys.net/~melanson/codecs/simpleaudio.html [dead]
52 * http://www.geocities.com/SiliconValley/8682/aud3.txt [dead]
53 * http://openquicktime.sourceforge.net/
54 * XAnim sources (xa_codec.c) http://xanim.polter.net/
55 * http://www.cs.ucla.edu/~leec/mediabench/applications.html [dead]
56 * SoX source code http://sox.sourceforge.net/
57 *
58 * CD-ROM XA:
59 * http://ku-www.ss.titech.ac.jp/~yatsushi/xaadpcm.html [dead]
60 * vagpack & depack http://homepages.compuserve.de/bITmASTER32/psx-index.html [dead]
61 * readstr http://www.geocities.co.jp/Playtown/2004/
62 */
63
64 #define CASE_0(codec_id, ...)
65 #define CASE_1(codec_id, ...) \
66 case codec_id: \
67 { __VA_ARGS__ } \
68 break;
69 #define CASE_2(enabled, codec_id, ...) \
70 CASE_ ## enabled(codec_id, __VA_ARGS__)
71 #define CASE_3(config, codec_id, ...) \
72 CASE_2(config, codec_id, __VA_ARGS__)
73 #define CASE(codec, ...) \
74 CASE_3(CONFIG_ ## codec ## _DECODER, AV_CODEC_ID_ ## codec, __VA_ARGS__)
75
76 /* These are for CD-ROM XA ADPCM */
77 static const int8_t xa_adpcm_table[5][2] = {
78 { 0, 0 },
79 { 60, 0 },
80 { 115, -52 },
81 { 98, -55 },
82 { 122, -60 }
83 };
84
85 static const int16_t afc_coeffs[2][16] = {
86 { 0, 2048, 0, 1024, 4096, 3584, 3072, 4608, 4200, 4800, 5120, 2048, 1024, -1024, -1024, -2048 },
87 { 0, 0, 2048, 1024, -2048, -1536, -1024, -2560, -2248, -2300, -3072, -2048, -1024, 1024, 0, 0 }
88 };
89
90 static const int16_t ea_adpcm_table[] = {
91 0, 240, 460, 392,
92 0, 0, -208, -220,
93 0, 1, 3, 4,
94 7, 8, 10, 11,
95 0, -1, -3, -4
96 };
97
98 /*
99 * Dumped from the binaries:
100 * - FantasticJourney.exe - 0x794D2, DGROUP:0x47A4D2
101 * - BigRaceUSA.exe - 0x9B8AA, DGROUP:0x49C4AA
102 * - Timeshock!.exe - 0x8506A, DGROUP:0x485C6A
103 */
104 static const int8_t ima_cunning_index_table[9] = {
105 -1, -1, -1, -1, 1, 2, 3, 4, -1
106 };
107
108 /*
109 * Dumped from the binaries:
110 * - FantasticJourney.exe - 0x79458, DGROUP:0x47A458
111 * - BigRaceUSA.exe - 0x9B830, DGROUP:0x49C430
112 * - Timeshock!.exe - 0x84FF0, DGROUP:0x485BF0
113 */
114 static const int16_t ima_cunning_step_table[61] = {
115 1, 1, 1, 1, 2, 2, 3, 3, 4, 5,
116 6, 7, 8, 10, 12, 14, 16, 20, 24, 28,
117 32, 40, 48, 56, 64, 80, 96, 112, 128, 160,
118 192, 224, 256, 320, 384, 448, 512, 640, 768, 896,
119 1024, 1280, 1536, 1792, 2048, 2560, 3072, 3584, 4096, 5120,
120 6144, 7168, 8192, 10240, 12288, 14336, 16384, 20480, 24576, 28672, 0
121 };
122
123 static const int8_t adpcm_index_table2[4] = {
124 -1, 2,
125 -1, 2,
126 };
127
128 static const int8_t adpcm_index_table3[8] = {
129 -1, -1, 1, 2,
130 -1, -1, 1, 2,
131 };
132
133 static const int8_t adpcm_index_table5[32] = {
134 -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16,
135 -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16,
136 };
137
138 static const int8_t * const adpcm_index_tables[4] = {
139 &adpcm_index_table2[0],
140 &adpcm_index_table3[0],
141 &ff_adpcm_index_table[0],
142 &adpcm_index_table5[0],
143 };
144
145 static const int16_t mtaf_stepsize[32][16] = {
146 { 1, 5, 9, 13, 16, 20, 24, 28,
147 -1, -5, -9, -13, -16, -20, -24, -28, },
148 { 2, 6, 11, 15, 20, 24, 29, 33,
149 -2, -6, -11, -15, -20, -24, -29, -33, },
150 { 2, 7, 13, 18, 23, 28, 34, 39,
151 -2, -7, -13, -18, -23, -28, -34, -39, },
152 { 3, 9, 15, 21, 28, 34, 40, 46,
153 -3, -9, -15, -21, -28, -34, -40, -46, },
154 { 3, 11, 18, 26, 33, 41, 48, 56,
155 -3, -11, -18, -26, -33, -41, -48, -56, },
156 { 4, 13, 22, 31, 40, 49, 58, 67,
157 -4, -13, -22, -31, -40, -49, -58, -67, },
158 { 5, 16, 26, 37, 48, 59, 69, 80,
159 -5, -16, -26, -37, -48, -59, -69, -80, },
160 { 6, 19, 31, 44, 57, 70, 82, 95,
161 -6, -19, -31, -44, -57, -70, -82, -95, },
162 { 7, 22, 38, 53, 68, 83, 99, 114,
163 -7, -22, -38, -53, -68, -83, -99, -114, },
164 { 9, 27, 45, 63, 81, 99, 117, 135,
165 -9, -27, -45, -63, -81, -99, -117, -135, },
166 { 10, 32, 53, 75, 96, 118, 139, 161,
167 -10, -32, -53, -75, -96, -118, -139, -161, },
168 { 12, 38, 64, 90, 115, 141, 167, 193,
169 -12, -38, -64, -90, -115, -141, -167, -193, },
170 { 15, 45, 76, 106, 137, 167, 198, 228,
171 -15, -45, -76, -106, -137, -167, -198, -228, },
172 { 18, 54, 91, 127, 164, 200, 237, 273,
173 -18, -54, -91, -127, -164, -200, -237, -273, },
174 { 21, 65, 108, 152, 195, 239, 282, 326,
175 -21, -65, -108, -152, -195, -239, -282, -326, },
176 { 25, 77, 129, 181, 232, 284, 336, 388,
177 -25, -77, -129, -181, -232, -284, -336, -388, },
178 { 30, 92, 153, 215, 276, 338, 399, 461,
179 -30, -92, -153, -215, -276, -338, -399, -461, },
180 { 36, 109, 183, 256, 329, 402, 476, 549,
181 -36, -109, -183, -256, -329, -402, -476, -549, },
182 { 43, 130, 218, 305, 392, 479, 567, 654,
183 -43, -130, -218, -305, -392, -479, -567, -654, },
184 { 52, 156, 260, 364, 468, 572, 676, 780,
185 -52, -156, -260, -364, -468, -572, -676, -780, },
186 { 62, 186, 310, 434, 558, 682, 806, 930,
187 -62, -186, -310, -434, -558, -682, -806, -930, },
188 { 73, 221, 368, 516, 663, 811, 958, 1106,
189 -73, -221, -368, -516, -663, -811, -958, -1106, },
190 { 87, 263, 439, 615, 790, 966, 1142, 1318,
191 -87, -263, -439, -615, -790, -966, -1142, -1318, },
192 { 104, 314, 523, 733, 942, 1152, 1361, 1571,
193 -104, -314, -523, -733, -942, -1152, -1361, -1571, },
194 { 124, 374, 623, 873, 1122, 1372, 1621, 1871,
195 -124, -374, -623, -873, -1122, -1372, -1621, -1871, },
196 { 148, 445, 743, 1040, 1337, 1634, 1932, 2229,
197 -148, -445, -743, -1040, -1337, -1634, -1932, -2229, },
198 { 177, 531, 885, 1239, 1593, 1947, 2301, 2655,
199 -177, -531, -885, -1239, -1593, -1947, -2301, -2655, },
200 { 210, 632, 1053, 1475, 1896, 2318, 2739, 3161,
201 -210, -632, -1053, -1475, -1896, -2318, -2739, -3161, },
202 { 251, 753, 1255, 1757, 2260, 2762, 3264, 3766,
203 -251, -753, -1255, -1757, -2260, -2762, -3264, -3766, },
204 { 299, 897, 1495, 2093, 2692, 3290, 3888, 4486,
205 -299, -897, -1495, -2093, -2692, -3290, -3888, -4486, },
206 { 356, 1068, 1781, 2493, 3206, 3918, 4631, 5343,
207 -356, -1068, -1781, -2493, -3206, -3918, -4631, -5343, },
208 { 424, 1273, 2121, 2970, 3819, 4668, 5516, 6365,
209 -424, -1273, -2121, -2970, -3819, -4668, -5516, -6365, },
210 };
211
212 static const int16_t oki_step_table[49] = {
213 16, 17, 19, 21, 23, 25, 28, 31, 34, 37,
214 41, 45, 50, 55, 60, 66, 73, 80, 88, 97,
215 107, 118, 130, 143, 157, 173, 190, 209, 230, 253,
216 279, 307, 337, 371, 408, 449, 494, 544, 598, 658,
217 724, 796, 876, 963, 1060, 1166, 1282, 1411, 1552
218 };
219
220 // padded to zero where table size is less then 16
221 static const int8_t swf_index_tables[4][16] = {
222 /*2*/ { -1, 2 },
223 /*3*/ { -1, -1, 2, 4 },
224 /*4*/ { -1, -1, -1, -1, 2, 4, 6, 8 },
225 /*5*/ { -1, -1, -1, -1, -1, -1, -1, -1, 1, 2, 4, 6, 8, 10, 13, 16 }
226 };
227
228 static const int8_t zork_index_table[8] = {
229 -1, -1, -1, 1, 4, 7, 10, 12,
230 };
231
232 static const int8_t mtf_index_table[16] = {
233 8, 6, 4, 2, -1, -1, -1, -1,
234 -1, -1, -1, -1, 2, 4, 6, 8,
235 };
236
237 /* end of tables */
238
239 typedef struct ADPCMDecodeContext {
240 ADPCMChannelStatus status[14];
241 int vqa_version; /**< VQA version. Used for ADPCM_IMA_WS */
242 int has_status; /**< Status flag. Reset to 0 after a flush. */
243 } ADPCMDecodeContext;
244
245 static void adpcm_flush(AVCodecContext *avctx);
246
247 187 static av_cold int adpcm_decode_init(AVCodecContext * avctx)
248 {
249 187 ADPCMDecodeContext *c = avctx->priv_data;
250 187 unsigned int min_channels = 1;
251 187 unsigned int max_channels = 2;
252
253 187 adpcm_flush(avctx);
254
255
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 187 switch(avctx->codec->id) {
256 3 case AV_CODEC_ID_ADPCM_IMA_AMV:
257 3 max_channels = 1;
258 3 break;
259 8 case AV_CODEC_ID_ADPCM_DTK:
260 case AV_CODEC_ID_ADPCM_EA:
261 8 min_channels = 2;
262 8 break;
263 23 case AV_CODEC_ID_ADPCM_AFC:
264 case AV_CODEC_ID_ADPCM_EA_R1:
265 case AV_CODEC_ID_ADPCM_EA_R2:
266 case AV_CODEC_ID_ADPCM_EA_R3:
267 case AV_CODEC_ID_ADPCM_EA_XAS:
268 case AV_CODEC_ID_ADPCM_MS:
269 23 max_channels = 6;
270 23 break;
271 ✗ case AV_CODEC_ID_ADPCM_MTAF:
272 ✗ min_channels = 2;
273 ✗ max_channels = 8;
274 ✗ if (avctx->channels & 1) {
275 ✗ avpriv_request_sample(avctx, "channel count %d", avctx->channels);
276 ✗ return AVERROR_PATCHWELCOME;
277 }
278 ✗ break;
279 ✗ case AV_CODEC_ID_ADPCM_PSX:
280 ✗ max_channels = 8;
281 ✗ if (avctx->channels <= 0 || avctx->block_align % (16 * avctx->channels))
282 ✗ return AVERROR_INVALIDDATA;
283 ✗ break;
284 8 case AV_CODEC_ID_ADPCM_IMA_DAT4:
285 case AV_CODEC_ID_ADPCM_THP:
286 case AV_CODEC_ID_ADPCM_THP_LE:
287 8 max_channels = 14;
288 8 break;
289 }
290
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 187 if (avctx->channels < min_channels || avctx->channels > max_channels) {
291 ✗ av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
292 ✗ return AVERROR(EINVAL);
293 }
294
295
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 187 switch(avctx->codec->id) {
296 10 case AV_CODEC_ID_ADPCM_IMA_WAV:
297
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 10 if (avctx->bits_per_coded_sample < 2 || avctx->bits_per_coded_sample > 5)
298 ✗ return AVERROR_INVALIDDATA;
299 10 break;
300 6 case AV_CODEC_ID_ADPCM_ARGO:
301
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 6 if (avctx->bits_per_coded_sample != 4 || avctx->block_align != 17 * avctx->channels)
302 ✗ return AVERROR_INVALIDDATA;
303 6 break;
304 ✗ case AV_CODEC_ID_ADPCM_ZORK:
305 ✗ if (avctx->bits_per_coded_sample != 8)
306 ✗ return AVERROR_INVALIDDATA;
307 ✗ break;
308 171 default:
309 171 break;
310 }
311
312
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 187 switch (avctx->codec->id) {
313 87 case AV_CODEC_ID_ADPCM_AICA:
314 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
315 case AV_CODEC_ID_ADPCM_IMA_DAT4:
316 case AV_CODEC_ID_ADPCM_IMA_QT:
317 case AV_CODEC_ID_ADPCM_IMA_WAV:
318 case AV_CODEC_ID_ADPCM_4XM:
319 case AV_CODEC_ID_ADPCM_XA:
320 case AV_CODEC_ID_ADPCM_EA_R1:
321 case AV_CODEC_ID_ADPCM_EA_R2:
322 case AV_CODEC_ID_ADPCM_EA_R3:
323 case AV_CODEC_ID_ADPCM_EA_XAS:
324 case AV_CODEC_ID_ADPCM_THP:
325 case AV_CODEC_ID_ADPCM_THP_LE:
326 case AV_CODEC_ID_ADPCM_AFC:
327 case AV_CODEC_ID_ADPCM_DTK:
328 case AV_CODEC_ID_ADPCM_PSX:
329 case AV_CODEC_ID_ADPCM_MTAF:
330 case AV_CODEC_ID_ADPCM_ARGO:
331 case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
332 87 avctx->sample_fmt = AV_SAMPLE_FMT_S16P;
333 87 break;
334 8 case AV_CODEC_ID_ADPCM_IMA_WS:
335
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 8 avctx->sample_fmt = c->vqa_version == 3 ? AV_SAMPLE_FMT_S16P :
336 AV_SAMPLE_FMT_S16;
337 8 break;
338 11 case AV_CODEC_ID_ADPCM_MS:
339
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 11 avctx->sample_fmt = avctx->channels > 2 ? AV_SAMPLE_FMT_S16P :
340 AV_SAMPLE_FMT_S16;
341 11 break;
342 81 default:
343 81 avctx->sample_fmt = AV_SAMPLE_FMT_S16;
344 }
345 187 return 0;
346 }
347
348 ✗ static inline int16_t adpcm_agm_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
349 {
350 int delta, pred, step, add;
351
352 ✗ pred = c->predictor;
353 ✗ delta = nibble & 7;
354 ✗ step = c->step;
355 ✗ add = (delta * 2 + 1) * step;
356 ✗ if (add < 0)
357 ✗ add = add + 7;
358
359 ✗ if ((nibble & 8) == 0)
360 ✗ pred = av_clip(pred + (add >> 3), -32767, 32767);
361 else
362 ✗ pred = av_clip(pred - (add >> 3), -32767, 32767);
363
364 ✗ switch (delta) {
365 ✗ case 7:
366 ✗ step *= 0x99;
367 ✗ break;
368 ✗ case 6:
369 ✗ c->step = av_clip(c->step * 2, 127, 24576);
370 ✗ c->predictor = pred;
371 ✗ return pred;
372 ✗ case 5:
373 ✗ step *= 0x66;
374 ✗ break;
375 ✗ case 4:
376 ✗ step *= 0x4d;
377 ✗ break;
378 ✗ default:
379 ✗ step *= 0x39;
380 ✗ break;
381 }
382
383 ✗ if (step < 0)
384 ✗ step += 0x3f;
385
386 ✗ c->step = step >> 6;
387 ✗ c->step = av_clip(c->step, 127, 24576);
388 ✗ c->predictor = pred;
389 ✗ return pred;
390 }
391
392 10314918 static inline int16_t adpcm_ima_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int shift)
393 {
394 int step_index;
395 int predictor;
396 int sign, delta, diff, step;
397
398 10314918 step = ff_adpcm_step_table[c->step_index];
399 10314918 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
400 10314918 step_index = av_clip(step_index, 0, 88);
401
402 10314918 sign = nibble & 8;
403 10314918 delta = nibble & 7;
404 /* perform direct multiplication instead of series of jumps proposed by
405 * the reference ADPCM implementation since modern CPUs can do the mults
406 * quickly enough */
407 10314918 diff = ((2 * delta + 1) * step) >> shift;
408 10314918 predictor = c->predictor;
409
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 10314918 if (sign) predictor -= diff;
410 5205218 else predictor += diff;
411
412 10314918 c->predictor = av_clip_int16(predictor);
413 10314918 c->step_index = step_index;
414
415 10314918 return (int16_t)c->predictor;
416 }
417
418 679344 static inline int16_t adpcm_ima_alp_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int shift)
419 {
420 int step_index;
421 int predictor;
422 int sign, delta, diff, step;
423
424 679344 step = ff_adpcm_step_table[c->step_index];
425 679344 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
426 679344 step_index = av_clip(step_index, 0, 88);
427
428 679344 sign = nibble & 8;
429 679344 delta = nibble & 7;
430 679344 diff = (delta * step) >> shift;
431 679344 predictor = c->predictor;
432
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 679344 if (sign) predictor -= diff;
433 339502 else predictor += diff;
434
435 679344 c->predictor = av_clip_int16(predictor);
436 679344 c->step_index = step_index;
437
438 679344 return (int16_t)c->predictor;
439 }
440
441 ✗ static inline int16_t adpcm_ima_mtf_expand_nibble(ADPCMChannelStatus *c, int nibble)
442 {
443 int step_index, step, delta, predictor;
444
445 ✗ step = ff_adpcm_step_table[c->step_index];
446
447 ✗ delta = step * (2 * nibble - 15);
448 ✗ predictor = c->predictor + delta;
449
450 ✗ step_index = c->step_index + mtf_index_table[(unsigned)nibble];
451 ✗ c->predictor = av_clip_int16(predictor >> 4);
452 ✗ c->step_index = av_clip(step_index, 0, 88);
453
454 ✗ return (int16_t)c->predictor;
455 }
456
457 386028 static inline int16_t adpcm_ima_cunning_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
458 {
459 int step_index;
460 int predictor;
461 int step;
462
463 386028 nibble = sign_extend(nibble & 0xF, 4);
464
465 386028 step = ima_cunning_step_table[c->step_index];
466 386028 step_index = c->step_index + ima_cunning_index_table[abs(nibble)];
467 386028 step_index = av_clip(step_index, 0, 60);
468
469 386028 predictor = c->predictor + step * nibble;
470
471 386028 c->predictor = av_clip_int16(predictor);
472 386028 c->step_index = step_index;
473
474 386028 return c->predictor;
475 }
476
477 ✗ static inline int16_t adpcm_ima_wav_expand_nibble(ADPCMChannelStatus *c, GetBitContext *gb, int bps)
478 {
479 int nibble, step_index, predictor, sign, delta, diff, step, shift;
480
481 ✗ shift = bps - 1;
482 ✗ nibble = get_bits_le(gb, bps),
483 ✗ step = ff_adpcm_step_table[c->step_index];
484 ✗ step_index = c->step_index + adpcm_index_tables[bps - 2][nibble];
485 ✗ step_index = av_clip(step_index, 0, 88);
486
487 ✗ sign = nibble & (1 << shift);
488 ✗ delta = av_mod_uintp2(nibble, shift);
489 ✗ diff = ((2 * delta + 1) * step) >> shift;
490 ✗ predictor = c->predictor;
491 ✗ if (sign) predictor -= diff;
492 ✗ else predictor += diff;
493
494 ✗ c->predictor = av_clip_int16(predictor);
495 ✗ c->step_index = step_index;
496
497 ✗ return (int16_t)c->predictor;
498 }
499
500 4696090 static inline int adpcm_ima_qt_expand_nibble(ADPCMChannelStatus *c, int nibble)
501 {
502 int step_index;
503 int predictor;
504 int diff, step;
505
506 4696090 step = ff_adpcm_step_table[c->step_index];
507 4696090 step_index = c->step_index + ff_adpcm_index_table[nibble];
508 4696090 step_index = av_clip(step_index, 0, 88);
509
510 4696090 diff = step >> 3;
511
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 4696090 if (nibble & 4) diff += step;
512
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 4696090 if (nibble & 2) diff += step >> 1;
513
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 4696090 if (nibble & 1) diff += step >> 2;
514
515
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 4696090 if (nibble & 8)
516 2338238 predictor = c->predictor - diff;
517 else
518 2357852 predictor = c->predictor + diff;
519
520 4696090 c->predictor = av_clip_int16(predictor);
521 4696090 c->step_index = step_index;
522
523 4696090 return c->predictor;
524 }
525
526 2229948 static inline int16_t adpcm_ms_expand_nibble(ADPCMChannelStatus *c, int nibble)
527 {
528 int predictor;
529
530 2229948 predictor = (((c->sample1) * (c->coeff1)) + ((c->sample2) * (c->coeff2))) / 64;
531
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 2229948 predictor += ((nibble & 0x08)?(nibble - 0x10):(nibble)) * c->idelta;
532
533 2229948 c->sample2 = c->sample1;
534 2229948 c->sample1 = av_clip_int16(predictor);
535 2229948 c->idelta = (ff_adpcm_AdaptationTable[(int)nibble] * c->idelta) >> 8;
536
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 2229948 if (c->idelta < 16) c->idelta = 16;
537
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 2229948 if (c->idelta > INT_MAX/768) {
538 ✗ av_log(NULL, AV_LOG_WARNING, "idelta overflow\n");
539 ✗ c->idelta = INT_MAX/768;
540 }
541
542 2229948 return c->sample1;
543 }
544
545 55124 static inline int16_t adpcm_ima_oki_expand_nibble(ADPCMChannelStatus *c, int nibble)
546 {
547 int step_index, predictor, sign, delta, diff, step;
548
549 55124 step = oki_step_table[c->step_index];
550 55124 step_index = c->step_index + ff_adpcm_index_table[(unsigned)nibble];
551 55124 step_index = av_clip(step_index, 0, 48);
552
553 55124 sign = nibble & 8;
554 55124 delta = nibble & 7;
555 55124 diff = ((2 * delta + 1) * step) >> 3;
556 55124 predictor = c->predictor;
557
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 55124 if (sign) predictor -= diff;
558 29772 else predictor += diff;
559
560 55124 c->predictor = av_clip_intp2(predictor, 11);
561 55124 c->step_index = step_index;
562
563 55124 return c->predictor * 16;
564 }
565
566 524192 static inline int16_t adpcm_ct_expand_nibble(ADPCMChannelStatus *c, int8_t nibble)
567 {
568 int sign, delta, diff;
569 int new_step;
570
571 524192 sign = nibble & 8;
572 524192 delta = nibble & 7;
573 /* perform direct multiplication instead of series of jumps proposed by
574 * the reference ADPCM implementation since modern CPUs can do the mults
575 * quickly enough */
576 524192 diff = ((2 * delta + 1) * c->step) >> 3;
577 /* predictor update is not so trivial: predictor is multiplied on 254/256 before updating */
578
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 524192 c->predictor = ((c->predictor * 254) >> 8) + (sign ? -diff : diff);
579 524192 c->predictor = av_clip_int16(c->predictor);
580 /* calculate new step and clamp it to range 511..32767 */
581 524192 new_step = (ff_adpcm_AdaptationTable[nibble & 7] * c->step) >> 8;
582 524192 c->step = av_clip(new_step, 511, 32767);
583
584 524192 return (int16_t)c->predictor;
585 }
586
587 313380 static inline int16_t adpcm_sbpro_expand_nibble(ADPCMChannelStatus *c, int8_t nibble, int size, int shift)
588 {
589 int sign, delta, diff;
590
591 313380 sign = nibble & (1<<(size-1));
592 313380 delta = nibble & ((1<<(size-1))-1);
593 313380 diff = delta << (7 + c->step + shift);
594
595 /* clamp result */
596
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 313380 c->predictor = av_clip(c->predictor + (sign ? -diff : diff), -16384,16256);
597
598 /* calculate new step */
599
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 313380 if (delta >= (2*size - 3) && c->step < 3)
600 75080 c->step++;
601
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 238300 else if (delta == 0 && c->step > 0)
602 75080 c->step--;
603
604 313380 return (int16_t) c->predictor;
605 }
606
607 1105920 static inline int16_t adpcm_yamaha_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
608 {
609
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 1105920 if(!c->step) {
610 5 c->predictor = 0;
611 5 c->step = 127;
612 }
613
614 1105920 c->predictor += (c->step * ff_adpcm_yamaha_difflookup[nibble]) / 8;
615 1105920 c->predictor = av_clip_int16(c->predictor);
616 1105920 c->step = (c->step * ff_adpcm_yamaha_indexscale[nibble]) >> 8;
617 1105920 c->step = av_clip(c->step, 127, 24576);
618 1105920 return c->predictor;
619 }
620
621 ✗ static inline int16_t adpcm_mtaf_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
622 {
623 ✗ c->predictor += mtaf_stepsize[c->step][nibble];
624 ✗ c->predictor = av_clip_int16(c->predictor);
625 ✗ c->step += ff_adpcm_index_table[nibble];
626 ✗ c->step = av_clip_uintp2(c->step, 5);
627 ✗ return c->predictor;
628 }
629
630 ✗ static inline int16_t adpcm_zork_expand_nibble(ADPCMChannelStatus *c, uint8_t nibble)
631 {
632 ✗ int16_t index = c->step_index;
633 ✗ uint32_t lookup_sample = ff_adpcm_step_table[index];
634 ✗ int32_t sample = 0;
635
636 ✗ if (nibble & 0x40)
637 ✗ sample += lookup_sample;
638 ✗ if (nibble & 0x20)
639 ✗ sample += lookup_sample >> 1;
640 ✗ if (nibble & 0x10)
641 ✗ sample += lookup_sample >> 2;
642 ✗ if (nibble & 0x08)
643 ✗ sample += lookup_sample >> 3;
644 ✗ if (nibble & 0x04)
645 ✗ sample += lookup_sample >> 4;
646 ✗ if (nibble & 0x02)
647 ✗ sample += lookup_sample >> 5;
648 ✗ if (nibble & 0x01)
649 ✗ sample += lookup_sample >> 6;
650 ✗ if (nibble & 0x80)
651 ✗ sample = -sample;
652
653 ✗ sample += c->predictor;
654 ✗ sample = av_clip_int16(sample);
655
656 ✗ index += zork_index_table[(nibble >> 4) & 7];
657 ✗ index = av_clip(index, 0, 88);
658
659 ✗ c->predictor = sample;
660 ✗ c->step_index = index;
661
662 ✗ return sample;
663 }
664
665 666 static int xa_decode(AVCodecContext *avctx, int16_t *out0, int16_t *out1,
666 const uint8_t *in, ADPCMChannelStatus *left,
667 ADPCMChannelStatus *right, int channels, int sample_offset)
668 {
669 int i, j;
670 int shift,filter,f0,f1;
671 int s_1,s_2;
672 int d,s,t;
673
674 666 out0 += sample_offset;
675
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 666 if (channels == 1)
676 ✗ out1 = out0 + 28;
677 else
678 666 out1 += sample_offset;
679
680
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 3330 for(i=0;i<4;i++) {
681 2664 shift = 12 - (in[4+i*2] & 15);
682 2664 filter = in[4+i*2] >> 4;
683
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 2664 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table)) {
684 ✗ avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
685 ✗ filter=0;
686 }
687
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 2664 if (shift < 0) {
688 ✗ avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift);
689 ✗ shift = 0;
690 }
691 2664 f0 = xa_adpcm_table[filter][0];
692 2664 f1 = xa_adpcm_table[filter][1];
693
694 2664 s_1 = left->sample1;
695 2664 s_2 = left->sample2;
696
697
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 77256 for(j=0;j<28;j++) {
698 74592 d = in[16+i+j*4];
699
700 74592 t = sign_extend(d, 4);
701 74592 s = t*(1<<shift) + ((s_1*f0 + s_2*f1+32)>>6);
702 74592 s_2 = s_1;
703 74592 s_1 = av_clip_int16(s);
704 74592 out0[j] = s_1;
705 }
706
707
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 2664 if (channels == 2) {
708 2664 left->sample1 = s_1;
709 2664 left->sample2 = s_2;
710 2664 s_1 = right->sample1;
711 2664 s_2 = right->sample2;
712 }
713
714 2664 shift = 12 - (in[5+i*2] & 15);
715 2664 filter = in[5+i*2] >> 4;
716
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 2664 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table) || shift < 0) {
717 ✗ avpriv_request_sample(avctx, "unknown XA-ADPCM filter %d", filter);
718 ✗ filter=0;
719 }
720
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 2664 if (shift < 0) {
721 ✗ avpriv_request_sample(avctx, "unknown XA-ADPCM shift %d", shift);
722 ✗ shift = 0;
723 }
724
725 2664 f0 = xa_adpcm_table[filter][0];
726 2664 f1 = xa_adpcm_table[filter][1];
727
728
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 77256 for(j=0;j<28;j++) {
729 74592 d = in[16+i+j*4];
730
731 74592 t = sign_extend(d >> 4, 4);
732 74592 s = t*(1<<shift) + ((s_1*f0 + s_2*f1+32)>>6);
733 74592 s_2 = s_1;
734 74592 s_1 = av_clip_int16(s);
735 74592 out1[j] = s_1;
736 }
737
738
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 2664 if (channels == 2) {
739 2664 right->sample1 = s_1;
740 2664 right->sample2 = s_2;
741 } else {
742 ✗ left->sample1 = s_1;
743 ✗ left->sample2 = s_2;
744 }
745
746 2664 out0 += 28 * (3 - channels);
747 2664 out1 += 28 * (3 - channels);
748 }
749
750 666 return 0;
751 }
752
753 195 static void adpcm_swf_decode(AVCodecContext *avctx, const uint8_t *buf, int buf_size, int16_t *samples)
754 {
755 195 ADPCMDecodeContext *c = avctx->priv_data;
756 GetBitContext gb;
757 const int8_t *table;
758 int k0, signmask, nb_bits, count;
759 195 int size = buf_size*8;
760 int i;
761
762 195 init_get_bits(&gb, buf, size);
763
764 //read bits & initial values
765 195 nb_bits = get_bits(&gb, 2)+2;
766 195 table = swf_index_tables[nb_bits-2];
767 195 k0 = 1 << (nb_bits-2);
768 195 signmask = 1 << (nb_bits-1);
769
770
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 390 while (get_bits_count(&gb) <= size - 22*avctx->channels) {
771
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 585 for (i = 0; i < avctx->channels; i++) {
772 390 *samples++ = c->status[i].predictor = get_sbits(&gb, 16);
773 390 c->status[i].step_index = get_bits(&gb, 6);
774 }
775
776
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 798720 for (count = 0; get_bits_count(&gb) <= size - nb_bits*avctx->channels && count < 4095; count++) {
777 int i;
778
779
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 2395575 for (i = 0; i < avctx->channels; i++) {
780 // similar to IMA adpcm
781 1597050 int delta = get_bits(&gb, nb_bits);
782 1597050 int step = ff_adpcm_step_table[c->status[i].step_index];
783 1597050 int vpdiff = 0; // vpdiff = (delta+0.5)*step/4
784 1597050 int k = k0;
785
786 do {
787
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 4791150 if (delta & k)
788 1979561 vpdiff += step;
789 4791150 step >>= 1;
790 4791150 k >>= 1;
791
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 4791150 } while(k);
792 1597050 vpdiff += step;
793
794
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 1597050 if (delta & signmask)
795 803527 c->status[i].predictor -= vpdiff;
796 else
797 793523 c->status[i].predictor += vpdiff;
798
799 1597050 c->status[i].step_index += table[delta & (~signmask)];
800
801 1597050 c->status[i].step_index = av_clip(c->status[i].step_index, 0, 88);
802 1597050 c->status[i].predictor = av_clip_int16(c->status[i].predictor);
803
804 1597050 *samples++ = c->status[i].predictor;
805 }
806 }
807 }
808 195 }
809
810 18335520 int16_t ff_adpcm_argo_expand_nibble(ADPCMChannelStatus *cs, int nibble, int shift, int flag)
811 {
812 18335520 int sample = sign_extend(nibble, 4) * (1 << shift);
813
814
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 18335520 if (flag)
815 9806208 sample += (8 * cs->sample1) - (4 * cs->sample2);
816 else
817 8529312 sample += 4 * cs->sample1;
818
819 18335520 sample = av_clip_int16(sample >> 2);
820
821 18335520 cs->sample2 = cs->sample1;
822 18335520 cs->sample1 = sample;
823
824 18335520 return sample;
825 }
826
827 /**
828 * Get the number of samples (per channel) that will be decoded from the packet.
829 * In one case, this is actually the maximum number of samples possible to
830 * decode with the given buf_size.
831 *
832 * @param[out] coded_samples set to the number of samples as coded in the
833 * packet, or 0 if the codec does not encode the
834 * number of samples in each frame.
835 * @param[out] approx_nb_samples set to non-zero if the number of samples
836 * returned is an approximation.
837 */
838 37569 static int get_nb_samples(AVCodecContext *avctx, GetByteContext *gb,
839 int buf_size, int *coded_samples, int *approx_nb_samples)
840 {
841 37569 ADPCMDecodeContext *s = avctx->priv_data;
842 37569 int nb_samples = 0;
843 37569 int ch = avctx->channels;
844 37569 int has_coded_samples = 0;
845 int header_size;
846
847 37569 *coded_samples = 0;
848 37569 *approx_nb_samples = 0;
849
850
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 37569 if(ch <= 0)
851 ✗ return 0;
852
853
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 37569 switch (avctx->codec->id) {
854 /* constant, only check buf_size */
855 600 case AV_CODEC_ID_ADPCM_EA_XAS:
856
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 600 if (buf_size < 76 * ch)
857 ✗ return 0;
858 600 nb_samples = 128;
859 600 break;
860 26342 case AV_CODEC_ID_ADPCM_IMA_QT:
861
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 26342 if (buf_size < 34 * ch)
862 ✗ return 0;
863 26342 nb_samples = 64;
864 26342 break;
865 /* simple 4-bit adpcm */
866 1084 case AV_CODEC_ID_ADPCM_CT:
867 case AV_CODEC_ID_ADPCM_IMA_APC:
868 case AV_CODEC_ID_ADPCM_IMA_CUNNING:
869 case AV_CODEC_ID_ADPCM_IMA_EA_SEAD:
870 case AV_CODEC_ID_ADPCM_IMA_OKI:
871 case AV_CODEC_ID_ADPCM_IMA_WS:
872 case AV_CODEC_ID_ADPCM_YAMAHA:
873 case AV_CODEC_ID_ADPCM_AICA:
874 case AV_CODEC_ID_ADPCM_IMA_SSI:
875 case AV_CODEC_ID_ADPCM_IMA_APM:
876 case AV_CODEC_ID_ADPCM_IMA_ALP:
877 case AV_CODEC_ID_ADPCM_IMA_MTF:
878 1084 nb_samples = buf_size * 2 / ch;
879 1084 break;
880 }
881
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 37569 if (nb_samples)
882 28026 return nb_samples;
883
884 /* simple 4-bit adpcm, with header */
885 9543 header_size = 0;
886
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 9543 switch (avctx->codec->id) {
887 145 case AV_CODEC_ID_ADPCM_4XM:
888 case AV_CODEC_ID_ADPCM_AGM:
889 case AV_CODEC_ID_ADPCM_IMA_ACORN:
890 case AV_CODEC_ID_ADPCM_IMA_DAT4:
891 case AV_CODEC_ID_ADPCM_IMA_MOFLEX:
892 145 case AV_CODEC_ID_ADPCM_IMA_ISS: header_size = 4 * ch; break;
893 350 case AV_CODEC_ID_ADPCM_IMA_SMJPEG: header_size = 4 * ch; break;
894 }
895
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 9543 if (header_size > 0)
896 495 return (buf_size - header_size) * 2 / ch;
897
898 /* more complex formats */
899
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 9048 switch (avctx->codec->id) {
900 161 case AV_CODEC_ID_ADPCM_IMA_AMV:
901 161 bytestream2_skip(gb, 4);
902 161 has_coded_samples = 1;
903 161 *coded_samples = bytestream2_get_le32u(gb);
904 161 nb_samples = FFMIN((buf_size - 8) * 2, *coded_samples);
905 161 bytestream2_seek(gb, -8, SEEK_CUR);
906 161 break;
907 158 case AV_CODEC_ID_ADPCM_EA:
908 158 has_coded_samples = 1;
909 158 *coded_samples = bytestream2_get_le32(gb);
910 158 *coded_samples -= *coded_samples % 28;
911 158 nb_samples = (buf_size - 12) / 30 * 28;
912 158 break;
913 47 case AV_CODEC_ID_ADPCM_IMA_EA_EACS:
914 47 has_coded_samples = 1;
915 47 *coded_samples = bytestream2_get_le32(gb);
916 47 nb_samples = (buf_size - (4 + 8 * ch)) * 2 / ch;
917 47 break;
918 30 case AV_CODEC_ID_ADPCM_EA_MAXIS_XA:
919 30 nb_samples = (buf_size - ch) / ch * 2;
920 30 break;
921 400 case AV_CODEC_ID_ADPCM_EA_R1:
922 case AV_CODEC_ID_ADPCM_EA_R2:
923 case AV_CODEC_ID_ADPCM_EA_R3:
924 /* maximum number of samples */
925 /* has internal offsets and a per-frame switch to signal raw 16-bit */
926 400 has_coded_samples = 1;
927
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 400 switch (avctx->codec->id) {
928 95 case AV_CODEC_ID_ADPCM_EA_R1:
929 95 header_size = 4 + 9 * ch;
930 95 *coded_samples = bytestream2_get_le32(gb);
931 95 break;
932 180 case AV_CODEC_ID_ADPCM_EA_R2:
933 180 header_size = 4 + 5 * ch;
934 180 *coded_samples = bytestream2_get_le32(gb);
935 180 break;
936 125 case AV_CODEC_ID_ADPCM_EA_R3:
937 125 header_size = 4 + 5 * ch;
938 125 *coded_samples = bytestream2_get_be32(gb);
939 125 break;
940 }
941 400 *coded_samples -= *coded_samples % 28;
942 400 nb_samples = (buf_size - header_size) * 2 / ch;
943 400 nb_samples -= nb_samples % 28;
944 400 *approx_nb_samples = 1;
945 400 break;
946 642 case AV_CODEC_ID_ADPCM_IMA_DK3:
947
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 642 if (avctx->block_align > 0)
948 642 buf_size = FFMIN(buf_size, avctx->block_align);
949 642 nb_samples = ((buf_size - 16) * 2 / 3 * 4) / ch;
950 642 break;
951 649 case AV_CODEC_ID_ADPCM_IMA_DK4:
952
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 649 if (avctx->block_align > 0)
953 649 buf_size = FFMIN(buf_size, avctx->block_align);
954
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 649 if (buf_size < 4 * ch)
955 ✗ return AVERROR_INVALIDDATA;
956 649 nb_samples = 1 + (buf_size - 4 * ch) * 2 / ch;
957 649 break;
958 1000 case AV_CODEC_ID_ADPCM_IMA_RAD:
959
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 1000 if (avctx->block_align > 0)
960 1000 buf_size = FFMIN(buf_size, avctx->block_align);
961 1000 nb_samples = (buf_size - 4 * ch) * 2 / ch;
962 1000 break;
963
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 1668 CASE(ADPCM_IMA_WAV,
964 int bsize = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
965 int bsamples = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
966 if (avctx->block_align > 0)
967 buf_size = FFMIN(buf_size, avctx->block_align);
968 if (buf_size < 4 * ch)
969 return AVERROR_INVALIDDATA;
970 nb_samples = 1 + (buf_size - 4 * ch) / (bsize * ch) * bsamples;
971 ) /* End of CASE */
972 2943 case AV_CODEC_ID_ADPCM_MS:
973
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 2943 if (avctx->block_align > 0)
974 2943 buf_size = FFMIN(buf_size, avctx->block_align);
975 2943 nb_samples = (buf_size - 6 * ch) * 2 / ch;
976 2943 break;
977 ✗ case AV_CODEC_ID_ADPCM_MTAF:
978 ✗ if (avctx->block_align > 0)
979 ✗ buf_size = FFMIN(buf_size, avctx->block_align);
980 ✗ nb_samples = (buf_size - 16 * (ch / 2)) * 2 / ch;
981 ✗ break;
982 57 case AV_CODEC_ID_ADPCM_SBPRO_2:
983 case AV_CODEC_ID_ADPCM_SBPRO_3:
984 case AV_CODEC_ID_ADPCM_SBPRO_4:
985 {
986 int samples_per_byte;
987
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 57 switch (avctx->codec->id) {
988 13 case AV_CODEC_ID_ADPCM_SBPRO_2: samples_per_byte = 4; break;
989 18 case AV_CODEC_ID_ADPCM_SBPRO_3: samples_per_byte = 3; break;
990 26 case AV_CODEC_ID_ADPCM_SBPRO_4: samples_per_byte = 2; break;
991 }
992
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 57 if (!s->status[0].step_index) {
993
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 3 if (buf_size < ch)
994 ✗ return AVERROR_INVALIDDATA;
995 3 nb_samples++;
996 3 buf_size -= ch;
997 }
998 57 nb_samples += buf_size * samples_per_byte / ch;
999 57 break;
1000 }
1001 195 case AV_CODEC_ID_ADPCM_SWF:
1002 {
1003 195 int buf_bits = buf_size * 8 - 2;
1004 195 int nbits = (bytestream2_get_byte(gb) >> 6) + 2;
1005 195 int block_hdr_size = 22 * ch;
1006 195 int block_size = block_hdr_size + nbits * ch * 4095;
1007 195 int nblocks = buf_bits / block_size;
1008 195 int bits_left = buf_bits - nblocks * block_size;
1009 195 nb_samples = nblocks * 4096;
1010
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 195 if (bits_left >= block_hdr_size)
1011 ✗ nb_samples += 1 + (bits_left - block_hdr_size) / (nbits * ch);
1012 195 break;
1013 }
1014 71 case AV_CODEC_ID_ADPCM_THP:
1015 case AV_CODEC_ID_ADPCM_THP_LE:
1016
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 71 if (avctx->extradata) {
1017 ✗ nb_samples = buf_size * 14 / (8 * ch);
1018 ✗ break;
1019 }
1020 71 has_coded_samples = 1;
1021 71 bytestream2_skip(gb, 4); // channel size
1022 142 *coded_samples = (avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE) ?
1023
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 142 bytestream2_get_le32(gb) :
1024 71 bytestream2_get_be32(gb);
1025 71 buf_size -= 8 + 36 * ch;
1026 71 buf_size /= ch;
1027 71 nb_samples = buf_size / 8 * 14;
1028
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 71 if (buf_size % 8 > 1)
1029 ✗ nb_samples += (buf_size % 8 - 1) * 2;
1030 71 *approx_nb_samples = 1;
1031 71 break;
1032 12 case AV_CODEC_ID_ADPCM_AFC:
1033 12 nb_samples = buf_size / (9 * ch) * 16;
1034 12 break;
1035 37 case AV_CODEC_ID_ADPCM_XA:
1036 37 nb_samples = (buf_size / 128) * 224 / ch;
1037 37 break;
1038 32 case AV_CODEC_ID_ADPCM_DTK:
1039 case AV_CODEC_ID_ADPCM_PSX:
1040 32 nb_samples = buf_size / (16 * ch) * 28;
1041 32 break;
1042 946 case AV_CODEC_ID_ADPCM_ARGO:
1043 946 nb_samples = buf_size / avctx->block_align * 32;
1044 946 break;
1045 ✗ case AV_CODEC_ID_ADPCM_ZORK:
1046 ✗ nb_samples = buf_size / ch;
1047 ✗ break;
1048 }
1049
1050 /* validate coded sample count */
1051
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 9048 if (has_coded_samples && (*coded_samples <= 0 || *coded_samples > nb_samples))
1052 ✗ return AVERROR_INVALIDDATA;
1053
1054 9048 return nb_samples;
1055 }
1056
1057 37569 static int adpcm_decode_frame(AVCodecContext *avctx, void *data,
1058 int *got_frame_ptr, AVPacket *avpkt)
1059 {
1060 37569 AVFrame *frame = data;
1061 37569 const uint8_t *buf = avpkt->data;
1062 37569 int buf_size = avpkt->size;
1063 37569 ADPCMDecodeContext *c = avctx->priv_data;
1064 int16_t *samples;
1065 int16_t **samples_p;
1066 int st; /* stereo */
1067 int nb_samples, coded_samples, approx_nb_samples, ret;
1068 GetByteContext gb;
1069
1070 37569 bytestream2_init(&gb, buf, buf_size);
1071 37569 nb_samples = get_nb_samples(avctx, &gb, buf_size, &coded_samples, &approx_nb_samples);
1072
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 37569 if (nb_samples <= 0) {
1073 ✗ av_log(avctx, AV_LOG_ERROR, "invalid number of samples in packet\n");
1074 ✗ return AVERROR_INVALIDDATA;
1075 }
1076
1077 /* get output buffer */
1078 37569 frame->nb_samples = nb_samples;
1079
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 37569 if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
1080 ✗ return ret;
1081 37569 samples = (int16_t *)frame->data[0];
1082 37569 samples_p = (int16_t **)frame->extended_data;
1083
1084 /* use coded_samples when applicable */
1085 /* it is always <= nb_samples, so the output buffer will be large enough */
1086
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 37569 if (coded_samples) {
1087
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 837 if (!approx_nb_samples && coded_samples != nb_samples)
1088 ✗ av_log(avctx, AV_LOG_WARNING, "mismatch in coded sample count\n");
1089 837 frame->nb_samples = nb_samples = coded_samples;
1090 }
1091
1092 37569 st = avctx->channels == 2 ? 1 : 0;
1093
1094
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 37569 switch(avctx->codec->id) {
1095
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 1466726 CASE(ADPCM_IMA_QT,
1096 /* In QuickTime, IMA is encoded by chunks of 34 bytes (=64 samples).
1097 Channel data is interleaved per-chunk. */
1098 for (int channel = 0; channel < avctx->channels; channel++) {
1099 ADPCMChannelStatus *cs = &c->status[channel];
1100 int predictor;
1101 int step_index;
1102 /* (pppppp) (piiiiiii) */
1103
1104 /* Bits 15-7 are the _top_ 9 bits of the 16-bit initial predictor value */
1105 predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
1106 step_index = predictor & 0x7F;
1107 predictor &= ~0x7F;
1108
1109 if (cs->step_index == step_index) {
1110 int diff = predictor - cs->predictor;
1111 if (diff < 0)
1112 diff = - diff;
1113 if (diff > 0x7f)
1114 goto update;
1115 } else {
1116 update:
1117 cs->step_index = step_index;
1118 cs->predictor = predictor;
1119 }
1120
1121 if (cs->step_index > 88u){
1122 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1123 channel, cs->step_index);
1124 return AVERROR_INVALIDDATA;
1125 }
1126
1127 samples = samples_p[channel];
1128
1129 for (int m = 0; m < 64; m += 2) {
1130 int byte = bytestream2_get_byteu(&gb);
1131 samples[m ] = adpcm_ima_qt_expand_nibble(cs, byte & 0x0F);
1132 samples[m + 1] = adpcm_ima_qt_expand_nibble(cs, byte >> 4 );
1133 }
1134 }
1135 ) /* End of CASE */
1136
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 1528416 CASE(ADPCM_IMA_WAV,
1137 for (int i = 0; i < avctx->channels; i++) {
1138 ADPCMChannelStatus *cs = &c->status[i];
1139 cs->predictor = samples_p[i][0] = sign_extend(bytestream2_get_le16u(&gb), 16);
1140
1141 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1142 if (cs->step_index > 88u){
1143 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1144 i, cs->step_index);
1145 return AVERROR_INVALIDDATA;
1146 }
1147 }
1148
1149 if (avctx->bits_per_coded_sample != 4) {
1150 int samples_per_block = ff_adpcm_ima_block_samples[avctx->bits_per_coded_sample - 2];
1151 int block_size = ff_adpcm_ima_block_sizes[avctx->bits_per_coded_sample - 2];
1152 uint8_t temp[20 + AV_INPUT_BUFFER_PADDING_SIZE] = { 0 };
1153 GetBitContext g;
1154
1155 for (int n = 0; n < (nb_samples - 1) / samples_per_block; n++) {
1156 for (int i = 0; i < avctx->channels; i++) {
1157 ADPCMChannelStatus *cs = &c->status[i];
1158 samples = &samples_p[i][1 + n * samples_per_block];
1159 for (int j = 0; j < block_size; j++) {
1160 temp[j] = buf[4 * avctx->channels + block_size * n * avctx->channels +
1161 (j % 4) + (j / 4) * (avctx->channels * 4) + i * 4];
1162 }
1163 ret = init_get_bits8(&g, (const uint8_t *)&temp, block_size);
1164 if (ret < 0)
1165 return ret;
1166 for (int m = 0; m < samples_per_block; m++) {
1167 samples[m] = adpcm_ima_wav_expand_nibble(cs, &g,
1168 avctx->bits_per_coded_sample);
1169 }
1170 }
1171 }
1172 bytestream2_skip(&gb, avctx->block_align - avctx->channels * 4);
1173 } else {
1174 for (int n = 0; n < (nb_samples - 1) / 8; n++) {
1175 for (int i = 0; i < avctx->channels; i++) {
1176 ADPCMChannelStatus *cs = &c->status[i];
1177 samples = &samples_p[i][1 + n * 8];
1178 for (int m = 0; m < 8; m += 2) {
1179 int v = bytestream2_get_byteu(&gb);
1180 samples[m ] = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
1181 samples[m + 1] = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
1182 }
1183 }
1184 }
1185 }
1186 ) /* End of CASE */
1187
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 38406 CASE(ADPCM_4XM,
1188 for (int i = 0; i < avctx->channels; i++)
1189 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1190
1191 for (int i = 0; i < avctx->channels; i++) {
1192 c->status[i].step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1193 if (c->status[i].step_index > 88u) {
1194 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1195 i, c->status[i].step_index);
1196 return AVERROR_INVALIDDATA;
1197 }
1198 }
1199
1200 for (int i = 0; i < avctx->channels; i++) {
1201 ADPCMChannelStatus *cs = &c->status[i];
1202 samples = (int16_t *)frame->data[i];
1203 for (int n = nb_samples >> 1; n > 0; n--) {
1204 int v = bytestream2_get_byteu(&gb);
1205 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 4);
1206 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 4);
1207 }
1208 }
1209 ) /* End of CASE */
1210 ✗ CASE(ADPCM_AGM,
1211 for (int i = 0; i < avctx->channels; i++)
1212 c->status[i].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1213 for (int i = 0; i < avctx->channels; i++)
1214 c->status[i].step = sign_extend(bytestream2_get_le16u(&gb), 16);
1215
1216 for (int n = 0; n < nb_samples >> (1 - st); n++) {
1217 int v = bytestream2_get_byteu(&gb);
1218 *samples++ = adpcm_agm_expand_nibble(&c->status[0], v & 0xF);
1219 *samples++ = adpcm_agm_expand_nibble(&c->status[st], v >> 4 );
1220 }
1221 ) /* End of CASE */
1222
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 1117917 CASE(ADPCM_MS,
1223 int block_predictor;
1224
1225 if (avctx->channels > 2) {
1226 for (int channel = 0; channel < avctx->channels; channel++) {
1227 samples = samples_p[channel];
1228 block_predictor = bytestream2_get_byteu(&gb);
1229 if (block_predictor > 6) {
1230 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[%d] = %d\n",
1231 channel, block_predictor);
1232 return AVERROR_INVALIDDATA;
1233 }
1234 c->status[channel].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1235 c->status[channel].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1236 c->status[channel].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1237 c->status[channel].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1238 c->status[channel].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1239 *samples++ = c->status[channel].sample2;
1240 *samples++ = c->status[channel].sample1;
1241 for (int n = (nb_samples - 2) >> 1; n > 0; n--) {
1242 int byte = bytestream2_get_byteu(&gb);
1243 *samples++ = adpcm_ms_expand_nibble(&c->status[channel], byte >> 4 );
1244 *samples++ = adpcm_ms_expand_nibble(&c->status[channel], byte & 0x0F);
1245 }
1246 }
1247 } else {
1248 block_predictor = bytestream2_get_byteu(&gb);
1249 if (block_predictor > 6) {
1250 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[0] = %d\n",
1251 block_predictor);
1252 return AVERROR_INVALIDDATA;
1253 }
1254 c->status[0].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1255 c->status[0].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1256 if (st) {
1257 block_predictor = bytestream2_get_byteu(&gb);
1258 if (block_predictor > 6) {
1259 av_log(avctx, AV_LOG_ERROR, "ERROR: block_predictor[1] = %d\n",
1260 block_predictor);
1261 return AVERROR_INVALIDDATA;
1262 }
1263 c->status[1].coeff1 = ff_adpcm_AdaptCoeff1[block_predictor];
1264 c->status[1].coeff2 = ff_adpcm_AdaptCoeff2[block_predictor];
1265 }
1266 c->status[0].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1267 if (st){
1268 c->status[1].idelta = sign_extend(bytestream2_get_le16u(&gb), 16);
1269 }
1270
1271 c->status[0].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1272 if (st) c->status[1].sample1 = sign_extend(bytestream2_get_le16u(&gb), 16);
1273 c->status[0].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1274 if (st) c->status[1].sample2 = sign_extend(bytestream2_get_le16u(&gb), 16);
1275
1276 *samples++ = c->status[0].sample2;
1277 if (st) *samples++ = c->status[1].sample2;
1278 *samples++ = c->status[0].sample1;
1279 if (st) *samples++ = c->status[1].sample1;
1280 for (int n = (nb_samples - 2) >> (1 - st); n > 0; n--) {
1281 int byte = bytestream2_get_byteu(&gb);
1282 *samples++ = adpcm_ms_expand_nibble(&c->status[0 ], byte >> 4 );
1283 *samples++ = adpcm_ms_expand_nibble(&c->status[st], byte & 0x0F);
1284 }
1285 }
1286 ) /* End of CASE */
1287 ✗ CASE(ADPCM_MTAF,
1288 for (int channel = 0; channel < avctx->channels; channel += 2) {
1289 bytestream2_skipu(&gb, 4);
1290 c->status[channel ].step = bytestream2_get_le16u(&gb) & 0x1f;
1291 c->status[channel + 1].step = bytestream2_get_le16u(&gb) & 0x1f;
1292 c->status[channel ].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1293 bytestream2_skipu(&gb, 2);
1294 c->status[channel + 1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1295 bytestream2_skipu(&gb, 2);
1296 for (int n = 0; n < nb_samples; n += 2) {
1297 int v = bytestream2_get_byteu(&gb);
1298 samples_p[channel][n ] = adpcm_mtaf_expand_nibble(&c->status[channel], v & 0x0F);
1299 samples_p[channel][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel], v >> 4 );
1300 }
1301 for (int n = 0; n < nb_samples; n += 2) {
1302 int v = bytestream2_get_byteu(&gb);
1303 samples_p[channel + 1][n ] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v & 0x0F);
1304 samples_p[channel + 1][n + 1] = adpcm_mtaf_expand_nibble(&c->status[channel + 1], v >> 4 );
1305 }
1306 }
1307 ) /* End of CASE */
1308
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 1325907 CASE(ADPCM_IMA_DK4,
1309 for (int channel = 0; channel < avctx->channels; channel++) {
1310 ADPCMChannelStatus *cs = &c->status[channel];
1311 cs->predictor = *samples++ = sign_extend(bytestream2_get_le16u(&gb), 16);
1312 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1313 if (cs->step_index > 88u){
1314 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1315 channel, cs->step_index);
1316 return AVERROR_INVALIDDATA;
1317 }
1318 }
1319 for (int n = (nb_samples - 1) >> (1 - st); n > 0; n--) {
1320 int v = bytestream2_get_byteu(&gb);
1321 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v >> 4 , 3);
1322 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
1323 }
1324 ) /* End of CASE */
1325
1326 /* DK3 ADPCM support macro */
1327 #define DK3_GET_NEXT_NIBBLE() \
1328 if (decode_top_nibble_next) { \
1329 nibble = last_byte >> 4; \
1330 decode_top_nibble_next = 0; \
1331 } else { \
1332 last_byte = bytestream2_get_byteu(&gb); \
1333 nibble = last_byte & 0x0F; \
1334 decode_top_nibble_next = 1; \
1335 }
1336
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 869910 CASE(ADPCM_IMA_DK3,
1337 int last_byte = 0;
1338 int nibble;
1339 int decode_top_nibble_next = 0;
1340 int diff_channel;
1341 const int16_t *samples_end = samples + avctx->channels * nb_samples;
1342
1343 bytestream2_skipu(&gb, 10);
1344 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1345 c->status[1].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1346 c->status[0].step_index = bytestream2_get_byteu(&gb);
1347 c->status[1].step_index = bytestream2_get_byteu(&gb);
1348 if (c->status[0].step_index > 88u || c->status[1].step_index > 88u){
1349 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i/%i\n",
1350 c->status[0].step_index, c->status[1].step_index);
1351 return AVERROR_INVALIDDATA;
1352 }
1353 /* sign extend the predictors */
1354 diff_channel = c->status[1].predictor;
1355
1356 while (samples < samples_end) {
1357
1358 /* for this algorithm, c->status[0] is the sum channel and
1359 * c->status[1] is the diff channel */
1360
1361 /* process the first predictor of the sum channel */
1362 DK3_GET_NEXT_NIBBLE();
1363 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1364
1365 /* process the diff channel predictor */
1366 DK3_GET_NEXT_NIBBLE();
1367 adpcm_ima_expand_nibble(&c->status[1], nibble, 3);
1368
1369 /* process the first pair of stereo PCM samples */
1370 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1371 *samples++ = c->status[0].predictor + c->status[1].predictor;
1372 *samples++ = c->status[0].predictor - c->status[1].predictor;
1373
1374 /* process the second predictor of the sum channel */
1375 DK3_GET_NEXT_NIBBLE();
1376 adpcm_ima_expand_nibble(&c->status[0], nibble, 3);
1377
1378 /* process the second pair of stereo PCM samples */
1379 diff_channel = (diff_channel + c->status[1].predictor) / 2;
1380 *samples++ = c->status[0].predictor + c->status[1].predictor;
1381 *samples++ = c->status[0].predictor - c->status[1].predictor;
1382 }
1383
1384 if ((bytestream2_tell(&gb) & 1))
1385 bytestream2_skip(&gb, 1);
1386 ) /* End of CASE */
1387
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 60690 CASE(ADPCM_IMA_ISS,
1388 for (int channel = 0; channel < avctx->channels; channel++) {
1389 ADPCMChannelStatus *cs = &c->status[channel];
1390 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1391 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1392 if (cs->step_index > 88u){
1393 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1394 channel, cs->step_index);
1395 return AVERROR_INVALIDDATA;
1396 }
1397 }
1398
1399 for (int n = nb_samples >> (1 - st); n > 0; n--) {
1400 int v1, v2;
1401 int v = bytestream2_get_byteu(&gb);
1402 /* nibbles are swapped for mono */
1403 if (st) {
1404 v1 = v >> 4;
1405 v2 = v & 0x0F;
1406 } else {
1407 v2 = v >> 4;
1408 v1 = v & 0x0F;
1409 }
1410 *samples++ = adpcm_ima_expand_nibble(&c->status[0 ], v1, 3);
1411 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v2, 3);
1412 }
1413 ) /* End of CASE */
1414 ✗ CASE(ADPCM_IMA_MOFLEX,
1415 for (int channel = 0; channel < avctx->channels; channel++) {
1416 ADPCMChannelStatus *cs = &c->status[channel];
1417 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1418 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1419 if (cs->step_index > 88u){
1420 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1421 channel, cs->step_index);
1422 return AVERROR_INVALIDDATA;
1423 }
1424 }
1425
1426 for (int subframe = 0; subframe < nb_samples / 256; subframe++) {
1427 for (int channel = 0; channel < avctx->channels; channel++) {
1428 samples = samples_p[channel] + 256 * subframe;
1429 for (int n = 0; n < 256; n += 2) {
1430 int v = bytestream2_get_byteu(&gb);
1431 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1432 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1433 }
1434 }
1435 }
1436 ) /* End of CASE */
1437 ✗ CASE(ADPCM_IMA_DAT4,
1438 for (int channel = 0; channel < avctx->channels; channel++) {
1439 ADPCMChannelStatus *cs = &c->status[channel];
1440 samples = samples_p[channel];
1441 bytestream2_skip(&gb, 4);
1442 for (int n = 0; n < nb_samples; n += 2) {
1443 int v = bytestream2_get_byteu(&gb);
1444 *samples++ = adpcm_ima_expand_nibble(cs, v >> 4 , 3);
1445 *samples++ = adpcm_ima_expand_nibble(cs, v & 0x0F, 3);
1446 }
1447 }
1448 ) /* End of CASE */
1449
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 732239 CASE(ADPCM_IMA_APC,
1450 for (int n = nb_samples >> (1 - st); n > 0; n--) {
1451 int v = bytestream2_get_byteu(&gb);
1452 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4 , 3);
1453 *samples++ = adpcm_ima_expand_nibble(&c->status[st], v & 0x0F, 3);
1454 }
1455 ) /* End of CASE */
1456
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 514727 CASE(ADPCM_IMA_SSI,
1457 for (int n = nb_samples >> (1 - st); n > 0; n--) {
1458 int v = bytestream2_get_byteu(&gb);
1459 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0], v >> 4 );
1460 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0x0F);
1461 }
1462 ) /* End of CASE */
1463
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 529026 CASE(ADPCM_IMA_APM,
1464 for (int n = nb_samples / 2; n > 0; n--) {
1465 for (int channel = 0; channel < avctx->channels; channel++) {
1466 int v = bytestream2_get_byteu(&gb);
1467 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[channel], v >> 4 );
1468 samples[st] = adpcm_ima_qt_expand_nibble(&c->status[channel], v & 0x0F);
1469 }
1470 samples += avctx->channels;
1471 }
1472 ) /* End of CASE */
1473
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 512129 CASE(ADPCM_IMA_ALP,
1474 for (int n = nb_samples / 2; n > 0; n--) {
1475 for (int channel = 0; channel < avctx->channels; channel++) {
1476 int v = bytestream2_get_byteu(&gb);
1477 *samples++ = adpcm_ima_alp_expand_nibble(&c->status[channel], v >> 4 , 2);
1478 samples[st] = adpcm_ima_alp_expand_nibble(&c->status[channel], v & 0x0F, 2);
1479 }
1480 samples += avctx->channels;
1481 }
1482 ) /* End of CASE */
1483
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 193104 CASE(ADPCM_IMA_CUNNING,
1484 for (int channel = 0; channel < avctx->channels; channel++) {
1485 int16_t *smp = samples_p[channel];
1486 for (int n = 0; n < nb_samples / 2; n++) {
1487 int v = bytestream2_get_byteu(&gb);
1488 *smp++ = adpcm_ima_cunning_expand_nibble(&c->status[channel], v & 0x0F);
1489 *smp++ = adpcm_ima_cunning_expand_nibble(&c->status[channel], v >> 4);
1490 }
1491 }
1492 ) /* End of CASE */
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 27569 CASE(ADPCM_IMA_OKI,
1494 for (int n = nb_samples >> (1 - st); n > 0; n--) {
1495 int v = bytestream2_get_byteu(&gb);
1496 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[0], v >> 4 );
1497 *samples++ = adpcm_ima_oki_expand_nibble(&c->status[st], v & 0x0F);
1498 }
1499 ) /* End of CASE */
1500
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 83000 CASE(ADPCM_IMA_RAD,
1501 for (int channel = 0; channel < avctx->channels; channel++) {
1502 ADPCMChannelStatus *cs = &c->status[channel];
1503 cs->step_index = sign_extend(bytestream2_get_le16u(&gb), 16);
1504 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1505 if (cs->step_index > 88u){
1506 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1507 channel, cs->step_index);
1508 return AVERROR_INVALIDDATA;
1509 }
1510 }
1511 for (int n = 0; n < nb_samples / 2; n++) {
1512 int byte[2];
1513
1514 byte[0] = bytestream2_get_byteu(&gb);
1515 if (st)
1516 byte[1] = bytestream2_get_byteu(&gb);
1517 for (int channel = 0; channel < avctx->channels; channel++) {
1518 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] & 0x0F, 3);
1519 }
1520 for (int channel = 0; channel < avctx->channels; channel++) {
1521 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], byte[channel] >> 4 , 3);
1522 }
1523 }
1524 ) /* End of CASE */
1525
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 474397 CASE(ADPCM_IMA_WS,
1526 if (c->vqa_version == 3) {
1527 for (int channel = 0; channel < avctx->channels; channel++) {
1528 int16_t *smp = samples_p[channel];
1529
1530 for (int n = nb_samples / 2; n > 0; n--) {
1531 int v = bytestream2_get_byteu(&gb);
1532 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1533 *smp++ = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1534 }
1535 }
1536 } else {
1537 for (int n = nb_samples / 2; n > 0; n--) {
1538 for (int channel = 0; channel < avctx->channels; channel++) {
1539 int v = bytestream2_get_byteu(&gb);
1540 *samples++ = adpcm_ima_expand_nibble(&c->status[channel], v & 0x0F, 3);
1541 samples[st] = adpcm_ima_expand_nibble(&c->status[channel], v >> 4 , 3);
1542 }
1543 samples += avctx->channels;
1544 }
1545 }
1546 bytestream2_seek(&gb, 0, SEEK_END);
1547 ) /* End of CASE */
1548
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 703 CASE(ADPCM_XA,
1549 int16_t *out0 = samples_p[0];
1550 int16_t *out1 = samples_p[1];
1551 int samples_per_block = 28 * (3 - avctx->channels) * 4;
1552 int sample_offset = 0;
1553 int bytes_remaining;
1554 while (bytestream2_get_bytes_left(&gb) >= 128) {
1555 if ((ret = xa_decode(avctx, out0, out1, buf + bytestream2_tell(&gb),
1556 &c->status[0], &c->status[1],
1557 avctx->channels, sample_offset)) < 0)
1558 return ret;
1559 bytestream2_skipu(&gb, 128);
1560 sample_offset += samples_per_block;
1561 }
1562 /* Less than a full block of data left, e.g. when reading from
1563 * 2324 byte per sector XA; the remainder is padding */
1564 bytes_remaining = bytestream2_get_bytes_left(&gb);
1565 if (bytes_remaining > 0) {
1566 bytestream2_skip(&gb, bytes_remaining);
1567 }
1568 ) /* End of CASE */
1569
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 69231 CASE(ADPCM_IMA_EA_EACS,
1570 for (int i = 0; i <= st; i++) {
1571 c->status[i].step_index = bytestream2_get_le32u(&gb);
1572 if (c->status[i].step_index > 88u) {
1573 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1574 i, c->status[i].step_index);
1575 return AVERROR_INVALIDDATA;
1576 }
1577 }
1578 for (int i = 0; i <= st; i++) {
1579 c->status[i].predictor = bytestream2_get_le32u(&gb);
1580 if (FFABS((int64_t)c->status[i].predictor) > (1<<16))
1581 return AVERROR_INVALIDDATA;
1582 }
1583
1584 for (int n = nb_samples >> (1 - st); n > 0; n--) {
1585 int byte = bytestream2_get_byteu(&gb);
1586 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 3);
1587 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 3);
1588 }
1589 ) /* End of CASE */
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 71441 CASE(ADPCM_IMA_EA_SEAD,
1591 for (int n = nb_samples >> (1 - st); n > 0; n--) {
1592 int byte = bytestream2_get_byteu(&gb);
1593 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte >> 4, 6);
1594 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte & 0x0F, 6);
1595 }
1596 ) /* End of CASE */
1597
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 240742 CASE(ADPCM_EA,
1598 int previous_left_sample, previous_right_sample;
1599 int current_left_sample, current_right_sample;
1600 int next_left_sample, next_right_sample;
1601 int coeff1l, coeff2l, coeff1r, coeff2r;
1602 int shift_left, shift_right;
1603
1604 /* Each EA ADPCM frame has a 12-byte header followed by 30-byte pieces,
1605 each coding 28 stereo samples. */
1606
1607 if(avctx->channels != 2)
1608 return AVERROR_INVALIDDATA;
1609
1610 current_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1611 previous_left_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1612 current_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1613 previous_right_sample = sign_extend(bytestream2_get_le16u(&gb), 16);
1614
1615 for (int count1 = 0; count1 < nb_samples / 28; count1++) {
1616 int byte = bytestream2_get_byteu(&gb);
1617 coeff1l = ea_adpcm_table[ byte >> 4 ];
1618 coeff2l = ea_adpcm_table[(byte >> 4 ) + 4];
1619 coeff1r = ea_adpcm_table[ byte & 0x0F];
1620 coeff2r = ea_adpcm_table[(byte & 0x0F) + 4];
1621
1622 byte = bytestream2_get_byteu(&gb);
1623 shift_left = 20 - (byte >> 4);
1624 shift_right = 20 - (byte & 0x0F);
1625
1626 for (int count2 = 0; count2 < 28; count2++) {
1627 byte = bytestream2_get_byteu(&gb);
1628 next_left_sample = sign_extend(byte >> 4, 4) * (1 << shift_left);
1629 next_right_sample = sign_extend(byte, 4) * (1 << shift_right);
1630
1631 next_left_sample = (next_left_sample +
1632 (current_left_sample * coeff1l) +
1633 (previous_left_sample * coeff2l) + 0x80) >> 8;
1634 next_right_sample = (next_right_sample +
1635 (current_right_sample * coeff1r) +
1636 (previous_right_sample * coeff2r) + 0x80) >> 8;
1637
1638 previous_left_sample = current_left_sample;
1639 current_left_sample = av_clip_int16(next_left_sample);
1640 previous_right_sample = current_right_sample;
1641 current_right_sample = av_clip_int16(next_right_sample);
1642 *samples++ = current_left_sample;
1643 *samples++ = current_right_sample;
1644 }
1645 }
1646
1647 bytestream2_skip(&gb, 2); // Skip terminating 0x0000
1648 ) /* End of CASE */
1649
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 3150 CASE(ADPCM_EA_MAXIS_XA,
1650 int coeff[2][2], shift[2];
1651
1652 for (int channel = 0; channel < avctx->channels; channel++) {
1653 int byte = bytestream2_get_byteu(&gb);
1654 for (int i = 0; i < 2; i++)
1655 coeff[channel][i] = ea_adpcm_table[(byte >> 4) + 4*i];
1656 shift[channel] = 20 - (byte & 0x0F);
1657 }
1658 for (int count1 = 0; count1 < nb_samples / 2; count1++) {
1659 int byte[2];
1660
1661 byte[0] = bytestream2_get_byteu(&gb);
1662 if (st) byte[1] = bytestream2_get_byteu(&gb);
1663 for (int i = 4; i >= 0; i-=4) { /* Pairwise samples LL RR (st) or LL LL (mono) */
1664 for (int channel = 0; channel < avctx->channels; channel++) {
1665 int sample = sign_extend(byte[channel] >> i, 4) * (1 << shift[channel]);
1666 sample = (sample +
1667 c->status[channel].sample1 * coeff[channel][0] +
1668 c->status[channel].sample2 * coeff[channel][1] + 0x80) >> 8;
1669 c->status[channel].sample2 = c->status[channel].sample1;
1670 c->status[channel].sample1 = av_clip_int16(sample);
1671 *samples++ = c->status[channel].sample1;
1672 }
1673 }
1674 }
1675 bytestream2_seek(&gb, 0, SEEK_END);
1676 ) /* End of CASE */
1677 #if CONFIG_ADPCM_EA_R1_DECODER || CONFIG_ADPCM_EA_R2_DECODER || CONFIG_ADPCM_EA_R3_DECODER
1678 400 case AV_CODEC_ID_ADPCM_EA_R1:
1679 case AV_CODEC_ID_ADPCM_EA_R2:
1680 case AV_CODEC_ID_ADPCM_EA_R3: {
1681 /* channel numbering
1682 2chan: 0=fl, 1=fr
1683 4chan: 0=fl, 1=rl, 2=fr, 3=rr
1684 6chan: 0=fl, 1=c, 2=fr, 3=rl, 4=rr, 5=sub */
1685 400 const int big_endian = avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R3;
1686 int previous_sample, current_sample, next_sample;
1687 int coeff1, coeff2;
1688 int shift;
1689 uint16_t *samplesC;
1690 400 int count = 0;
1691 int offsets[6];
1692
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 1200 for (unsigned channel = 0; channel < avctx->channels; channel++)
1694
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 800 offsets[channel] = (big_endian ? bytestream2_get_be32(&gb) :
1695 550 bytestream2_get_le32(&gb)) +
1696 800 (avctx->channels + 1) * 4;
1697
1698
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 1200 for (unsigned channel = 0; channel < avctx->channels; channel++) {
1699 int count1;
1700
1701 800 bytestream2_seek(&gb, offsets[channel], SEEK_SET);
1702 800 samplesC = samples_p[channel];
1703
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 800 if (avctx->codec->id == AV_CODEC_ID_ADPCM_EA_R1) {
1705 190 current_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1706 190 previous_sample = sign_extend(bytestream2_get_le16(&gb), 16);
1707 } else {
1708 610 current_sample = c->status[channel].predictor;
1709 610 previous_sample = c->status[channel].prev_sample;
1710 }
1711
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 41992 for (count1 = 0; count1 < nb_samples / 28; count1++) {
1713 41192 int byte = bytestream2_get_byte(&gb);
1714
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 41192 if (byte == 0xEE) { /* only seen in R2 and R3 */
1715 12 current_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1716 12 previous_sample = sign_extend(bytestream2_get_be16(&gb), 16);
1717
1718
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 348 for (int count2 = 0; count2 < 28; count2++)
1719 336 *samplesC++ = sign_extend(bytestream2_get_be16(&gb), 16);
1720 } else {
1721 41180 coeff1 = ea_adpcm_table[ byte >> 4 ];
1722 41180 coeff2 = ea_adpcm_table[(byte >> 4) + 4];
1723 41180 shift = 20 - (byte & 0x0F);
1724
1725
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 1194220 for (int count2 = 0; count2 < 28; count2++) {
1726
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 1153040 if (count2 & 1)
1727 576520 next_sample = (unsigned)sign_extend(byte, 4) << shift;
1728 else {
1729 576520 byte = bytestream2_get_byte(&gb);
1730 576520 next_sample = (unsigned)sign_extend(byte >> 4, 4) << shift;
1731 }
1732
1733 1153040 next_sample += (current_sample * coeff1) +
1734 1153040 (previous_sample * coeff2);
1735 1153040 next_sample = av_clip_int16(next_sample >> 8);
1736
1737 1153040 previous_sample = current_sample;
1738 1153040 current_sample = next_sample;
1739 1153040 *samplesC++ = current_sample;
1740 }
1741 }
1742 }
1743
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 800 if (!count) {
1744 400 count = count1;
1745
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 400 } else if (count != count1) {
1746 ✗ av_log(avctx, AV_LOG_WARNING, "per-channel sample count mismatch\n");
1747 ✗ count = FFMAX(count, count1);
1748 }
1749
1750
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 800 if (avctx->codec->id != AV_CODEC_ID_ADPCM_EA_R1) {
1751 610 c->status[channel].predictor = current_sample;
1752 610 c->status[channel].prev_sample = previous_sample;
1753 }
1754 }
1755
1756 400 frame->nb_samples = count * 28;
1757 400 bytestream2_seek(&gb, 0, SEEK_END);
1758 400 break;
1759 }
1760 #endif /* CONFIG_ADPCM_EA_Rx_DECODER */
1761
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 53400 CASE(ADPCM_EA_XAS,
1762 for (int channel=0; channel < avctx->channels; channel++) {
1763 int coeff[2][4], shift[4];
1764 int16_t *s = samples_p[channel];
1765 for (int n = 0; n < 4; n++, s += 32) {
1766 int val = sign_extend(bytestream2_get_le16u(&gb), 16);
1767 for (int i = 0; i < 2; i++)
1768 coeff[i][n] = ea_adpcm_table[(val&0x0F)+4*i];
1769 s[0] = val & ~0x0F;
1770
1771 val = sign_extend(bytestream2_get_le16u(&gb), 16);
1772 shift[n] = 20 - (val & 0x0F);
1773 s[1] = val & ~0x0F;
1774 }
1775
1776 for (int m = 2; m < 32; m += 2) {
1777 s = &samples_p[channel][m];
1778 for (int n = 0; n < 4; n++, s += 32) {
1779 int level, pred;
1780 int byte = bytestream2_get_byteu(&gb);
1781
1782 level = sign_extend(byte >> 4, 4) * (1 << shift[n]);
1783 pred = s[-1] * coeff[0][n] + s[-2] * coeff[1][n];
1784 s[0] = av_clip_int16((level + pred + 0x80) >> 8);
1785
1786 level = sign_extend(byte, 4) * (1 << shift[n]);
1787 pred = s[0] * coeff[0][n] + s[-1] * coeff[1][n];
1788 s[1] = av_clip_int16((level + pred + 0x80) >> 8);
1789 }
1790 }
1791 }
1792 ) /* End of CASE */
1793 ✗ CASE(ADPCM_IMA_ACORN,
1794 for (int channel = 0; channel < avctx->channels; channel++) {
1795 ADPCMChannelStatus *cs = &c->status[channel];
1796 cs->predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1797 cs->step_index = bytestream2_get_le16u(&gb) & 0xFF;
1798 if (cs->step_index > 88u){
1799 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index[%d] = %i\n",
1800 channel, cs->step_index);
1801 return AVERROR_INVALIDDATA;
1802 }
1803 }
1804 for (int n = nb_samples >> (1 - st); n > 0; n--) {
1805 int byte = bytestream2_get_byteu(&gb);
1806 *samples++ = adpcm_ima_expand_nibble(&c->status[0], byte & 0x0F, 3);
1807 *samples++ = adpcm_ima_expand_nibble(&c->status[st], byte >> 4, 3);
1808 }
1809 ) /* End of CASE */
1810
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 111090 CASE(ADPCM_IMA_AMV,
1811 av_assert0(avctx->channels == 1);
1812
1813 /*
1814 * Header format:
1815 * int16_t predictor;
1816 * uint8_t step_index;
1817 * uint8_t reserved;
1818 * uint32_t frame_size;
1819 *
1820 * Some implementations have step_index as 16-bits, but others
1821 * only use the lower 8 and store garbage in the upper 8.
1822 */
1823 c->status[0].predictor = sign_extend(bytestream2_get_le16u(&gb), 16);
1824 c->status[0].step_index = bytestream2_get_byteu(&gb);
1825 bytestream2_skipu(&gb, 5);
1826 if (c->status[0].step_index > 88u) {
1827 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1828 c->status[0].step_index);
1829 return AVERROR_INVALIDDATA;
1830 }
1831
1832 for (int n = nb_samples >> 1; n > 0; n--) {
1833 int v = bytestream2_get_byteu(&gb);
1834
1835 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3);
1836 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v & 0xf, 3);
1837 }
1838
1839 if (nb_samples & 1) {
1840 int v = bytestream2_get_byteu(&gb);
1841 *samples++ = adpcm_ima_expand_nibble(&c->status[0], v >> 4, 3);
1842
1843 if (v & 0x0F) {
1844 /* Holds true on all the http://samples.mplayerhq.hu/amv samples. */
1845 av_log(avctx, AV_LOG_WARNING, "Last nibble set on packet with odd sample count.\n");
1846 av_log(avctx, AV_LOG_WARNING, "Sample will be skipped.\n");
1847 }
1848 }
1849 ) /* End of CASE */
1850
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 90300 CASE(ADPCM_IMA_SMJPEG,
1851 for (int i = 0; i < avctx->channels; i++) {
1852 c->status[i].predictor = sign_extend(bytestream2_get_be16u(&gb), 16);
1853 c->status[i].step_index = bytestream2_get_byteu(&gb);
1854 bytestream2_skipu(&gb, 1);
1855 if (c->status[i].step_index > 88u) {
1856 av_log(avctx, AV_LOG_ERROR, "ERROR: step_index = %i\n",
1857 c->status[i].step_index);
1858 return AVERROR_INVALIDDATA;
1859 }
1860 }
1861
1862 for (int n = nb_samples >> (1 - st); n > 0; n--) {
1863 int v = bytestream2_get_byteu(&gb);
1864
1865 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[0 ], v >> 4 );
1866 *samples++ = adpcm_ima_qt_expand_nibble(&c->status[st], v & 0xf);
1867 }
1868 ) /* End of CASE */
1869
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 262160 CASE(ADPCM_CT,
1870 for (int n = nb_samples >> (1 - st); n > 0; n--) {
1871 int v = bytestream2_get_byteu(&gb);
1872 *samples++ = adpcm_ct_expand_nibble(&c->status[0 ], v >> 4 );
1873 *samples++ = adpcm_ct_expand_nibble(&c->status[st], v & 0x0F);
1874 }
1875 ) /* End of CASE */
1876 #if CONFIG_ADPCM_SBPRO_2_DECODER || CONFIG_ADPCM_SBPRO_3_DECODER || \
1877 CONFIG_ADPCM_SBPRO_4_DECODER
1878 57 case AV_CODEC_ID_ADPCM_SBPRO_4:
1879 case AV_CODEC_ID_ADPCM_SBPRO_3:
1880 case AV_CODEC_ID_ADPCM_SBPRO_2:
1881
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 57 if (!c->status[0].step_index) {
1882 /* the first byte is a raw sample */
1883 3 *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1884
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 3 if (st)
1885 ✗ *samples++ = 128 * (bytestream2_get_byteu(&gb) - 0x80);
1886 3 c->status[0].step_index = 1;
1887 3 nb_samples--;
1888 }
1889
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 57 if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_4) {
1890
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 52256 for (int n = nb_samples >> (1 - st); n > 0; n--) {
1891 52230 int byte = bytestream2_get_byteu(&gb);
1892 104460 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1893 52230 byte >> 4, 4, 0);
1894 52230 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1895 52230 byte & 0x0F, 4, 0);
1896 }
1897
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 31 } else if (avctx->codec->id == AV_CODEC_ID_ADPCM_SBPRO_3) {
1898
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 34838 for (int n = (nb_samples<<st) / 3; n > 0; n--) {
1899 34820 int byte = bytestream2_get_byteu(&gb);
1900 69640 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1901 34820 byte >> 5 , 3, 0);
1902 69640 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1903 34820 (byte >> 2) & 0x07, 3, 0);
1904 34820 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1905 34820 byte & 0x03, 2, 0);
1906 }
1907 } else {
1908
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 26128 for (int n = nb_samples >> (2 - st); n > 0; n--) {
1909 26115 int byte = bytestream2_get_byteu(&gb);
1910 52230 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1911 26115 byte >> 6 , 2, 2);
1912 52230 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1913 26115 (byte >> 4) & 0x03, 2, 2);
1914 52230 *samples++ = adpcm_sbpro_expand_nibble(&c->status[0],
1915 26115 (byte >> 2) & 0x03, 2, 2);
1916 26115 *samples++ = adpcm_sbpro_expand_nibble(&c->status[st],
1917 26115 byte & 0x03, 2, 2);
1918 }
1919 }
1920 57 break;
1921 #endif /* CONFIG_ADPCM_SBPRO_x_DECODER */
1922 195 CASE(ADPCM_SWF,
1923 adpcm_swf_decode(avctx, buf, buf_size, samples);
1924 bytestream2_seek(&gb, 0, SEEK_END);
1925 ) /* End of CASE */
1926
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 553096 CASE(ADPCM_YAMAHA,
1927 for (int n = nb_samples >> (1 - st); n > 0; n--) {
1928 int v = bytestream2_get_byteu(&gb);
1929 *samples++ = adpcm_yamaha_expand_nibble(&c->status[0 ], v & 0x0F);
1930 *samples++ = adpcm_yamaha_expand_nibble(&c->status[st], v >> 4 );
1931 }
1932 ) /* End of CASE */
1933 ✗ CASE(ADPCM_AICA,
1934 for (int channel = 0; channel < avctx->channels; channel++) {
1935 samples = samples_p[channel];
1936 for (int n = nb_samples >> 1; n > 0; n--) {
1937 int v = bytestream2_get_byteu(&gb);
1938 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v & 0x0F);
1939 *samples++ = adpcm_yamaha_expand_nibble(&c->status[channel], v >> 4 );
1940 }
1941 }
1942 ) /* End of CASE */
1943
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 457008 CASE(ADPCM_AFC,
1944 int samples_per_block;
1945 int blocks;
1946
1947 if (avctx->extradata && avctx->extradata_size == 1 && avctx->extradata[0]) {
1948 samples_per_block = avctx->extradata[0] / 16;
1949 blocks = nb_samples / avctx->extradata[0];
1950 } else {
1951 samples_per_block = nb_samples / 16;
1952 blocks = 1;
1953 }
1954
1955 for (int m = 0; m < blocks; m++) {
1956 for (int channel = 0; channel < avctx->channels; channel++) {
1957 int prev1 = c->status[channel].sample1;
1958 int prev2 = c->status[channel].sample2;
1959
1960 samples = samples_p[channel] + m * 16;
1961 /* Read in every sample for this channel. */
1962 for (int i = 0; i < samples_per_block; i++) {
1963 int byte = bytestream2_get_byteu(&gb);
1964 int scale = 1 << (byte >> 4);
1965 int index = byte & 0xf;
1966 int factor1 = afc_coeffs[0][index];
1967 int factor2 = afc_coeffs[1][index];
1968
1969 /* Decode 16 samples. */
1970 for (int n = 0; n < 16; n++) {
1971 int32_t sampledat;
1972
1973 if (n & 1) {
1974 sampledat = sign_extend(byte, 4);
1975 } else {
1976 byte = bytestream2_get_byteu(&gb);
1977 sampledat = sign_extend(byte >> 4, 4);
1978 }
1979
1980 sampledat = ((prev1 * factor1 + prev2 * factor2) >> 11) +
1981 sampledat * scale;
1982 *samples = av_clip_int16(sampledat);
1983 prev2 = prev1;
1984 prev1 = *samples++;
1985 }
1986 }
1987
1988 c->status[channel].sample1 = prev1;
1989 c->status[channel].sample2 = prev2;
1990 }
1991 }
1992 bytestream2_seek(&gb, 0, SEEK_END);
1993 ) /* End of CASE */
1994 #if CONFIG_ADPCM_THP_DECODER || CONFIG_ADPCM_THP_LE_DECODER
1995 71 case AV_CODEC_ID_ADPCM_THP:
1996 case AV_CODEC_ID_ADPCM_THP_LE:
1997 {
1998 int table[14][16];
1999
2000 #define THP_GET16(g) \
2001 sign_extend( \
2002 avctx->codec->id == AV_CODEC_ID_ADPCM_THP_LE ? \
2003 bytestream2_get_le16u(&(g)) : \
2004 bytestream2_get_be16u(&(g)), 16)
2005
2006
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 71 if (avctx->extradata) {
2007 GetByteContext tb;
2008 ✗ if (avctx->extradata_size < 32 * avctx->channels) {
2009 ✗ av_log(avctx, AV_LOG_ERROR, "Missing coeff table\n");
2010 ✗ return AVERROR_INVALIDDATA;
2011 }
2012
2013 ✗ bytestream2_init(&tb, avctx->extradata, avctx->extradata_size);
2014 ✗ for (int i = 0; i < avctx->channels; i++)
2015 ✗ for (int n = 0; n < 16; n++)
2016 ✗ table[i][n] = THP_GET16(tb);
2017 } else {
2018
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 213 for (int i = 0; i < avctx->channels; i++)
2019
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 2414 for (int n = 0; n < 16; n++)
2020
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 2272 table[i][n] = THP_GET16(gb);
2021
2022
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 71 if (!c->has_status) {
2023 /* Initialize the previous sample. */
2024
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 3 for (int i = 0; i < avctx->channels; i++) {
2025
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 2 c->status[i].sample1 = THP_GET16(gb);
2026
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 2 c->status[i].sample2 = THP_GET16(gb);
2027 }
2028 1 c->has_status = 1;
2029 } else {
2030 70 bytestream2_skip(&gb, avctx->channels * 4);
2031 }
2032 }
2033
2034
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 213 for (int ch = 0; ch < avctx->channels; ch++) {
2035 142 samples = samples_p[ch];
2036
2037 /* Read in every sample for this channel. */
2038
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 10982 for (int i = 0; i < (nb_samples + 13) / 14; i++) {
2039 10840 int byte = bytestream2_get_byteu(&gb);
2040 10840 int index = (byte >> 4) & 7;
2041 10840 unsigned int exp = byte & 0x0F;
2042 10840 int64_t factor1 = table[ch][index * 2];
2043 10840 int64_t factor2 = table[ch][index * 2 + 1];
2044
2045 /* Decode 14 samples. */
2046
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 162600 for (int n = 0; n < 14 && (i * 14 + n < nb_samples); n++) {
2047 int32_t sampledat;
2048
2049
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 151760 if (n & 1) {
2050 75880 sampledat = sign_extend(byte, 4);
2051 } else {
2052 75880 byte = bytestream2_get_byteu(&gb);
2053 75880 sampledat = sign_extend(byte >> 4, 4);
2054 }
2055
2056 151760 sampledat = ((c->status[ch].sample1 * factor1
2057 151760 + c->status[ch].sample2 * factor2) >> 11) + sampledat * (1 << exp);
2058 151760 *samples = av_clip_int16(sampledat);
2059 151760 c->status[ch].sample2 = c->status[ch].sample1;
2060 151760 c->status[ch].sample1 = *samples++;
2061 }
2062 }
2063 }
2064 71 break;
2065 }
2066 #endif /* CONFIG_ADPCM_THP(_LE)_DECODER */
2067
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 59488 CASE(ADPCM_DTK,
2068 for (int channel = 0; channel < avctx->channels; channel++) {
2069 samples = samples_p[channel];
2070
2071 /* Read in every sample for this channel. */
2072 for (int i = 0; i < nb_samples / 28; i++) {
2073 int byte, header;
2074 if (channel)
2075 bytestream2_skipu(&gb, 1);
2076 header = bytestream2_get_byteu(&gb);
2077 bytestream2_skipu(&gb, 3 - channel);
2078
2079 /* Decode 28 samples. */
2080 for (int n = 0; n < 28; n++) {
2081 int32_t sampledat, prev;
2082
2083 switch (header >> 4) {
2084 case 1:
2085 prev = (c->status[channel].sample1 * 0x3c);
2086 break;
2087 case 2:
2088 prev = (c->status[channel].sample1 * 0x73) - (c->status[channel].sample2 * 0x34);
2089 break;
2090 case 3:
2091 prev = (c->status[channel].sample1 * 0x62) - (c->status[channel].sample2 * 0x37);
2092 break;
2093 default:
2094 prev = 0;
2095 }
2096
2097 prev = av_clip_intp2((prev + 0x20) >> 6, 21);
2098
2099 byte = bytestream2_get_byteu(&gb);
2100 if (!channel)
2101 sampledat = sign_extend(byte, 4);
2102 else
2103 sampledat = sign_extend(byte >> 4, 4);
2104
2105 sampledat = ((sampledat * (1 << 12)) >> (header & 0xf)) * (1 << 6) + prev;
2106 *samples++ = av_clip_int16(sampledat >> 6);
2107 c->status[channel].sample2 = c->status[channel].sample1;
2108 c->status[channel].sample1 = sampledat;
2109 }
2110 }
2111 if (!channel)
2112 bytestream2_seek(&gb, 0, SEEK_SET);
2113 }
2114 ) /* End of CASE */
2115 ✗ CASE(ADPCM_PSX,
2116 for (int block = 0; block < avpkt->size / FFMAX(avctx->block_align, 16 * avctx->channels); block++) {
2117 int nb_samples_per_block = 28 * FFMAX(avctx->block_align, 16 * avctx->channels) / (16 * avctx->channels);
2118 for (int channel = 0; channel < avctx->channels; channel++) {
2119 samples = samples_p[channel] + block * nb_samples_per_block;
2120 av_assert0((block + 1) * nb_samples_per_block <= nb_samples);
2121
2122 /* Read in every sample for this channel. */
2123 for (int i = 0; i < nb_samples_per_block / 28; i++) {
2124 int filter, shift, flag, byte;
2125
2126 filter = bytestream2_get_byteu(&gb);
2127 shift = filter & 0xf;
2128 filter = filter >> 4;
2129 if (filter >= FF_ARRAY_ELEMS(xa_adpcm_table))
2130 return AVERROR_INVALIDDATA;
2131 flag = bytestream2_get_byteu(&gb) & 0x7;
2132
2133 /* Decode 28 samples. */
2134 for (int n = 0; n < 28; n++) {
2135 int sample = 0, scale;
2136
2137 if (n & 1) {
2138 scale = sign_extend(byte >> 4, 4);
2139 } else {
2140 byte = bytestream2_get_byteu(&gb);
2141 scale = sign_extend(byte, 4);
2142 }
2143
2144 if (flag < 0x07) {
2145 scale = scale * (1 << 12);
2146 sample = (int)((scale >> shift) + (c->status[channel].sample1 * xa_adpcm_table[filter][0] + c->status[channel].sample2 * xa_adpcm_table[filter][1]) / 64);
2147 }
2148 *samples++ = av_clip_int16(sample);
2149 c->status[channel].sample2 = c->status[channel].sample1;
2150 c->status[channel].sample1 = sample;
2151 }
2152 }
2153 }
2154 }
2155 ) /* End of CASE */
2156
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 825193 CASE(ADPCM_ARGO,
2157 /*
2158 * The format of each block:
2159 * uint8_t left_control;
2160 * uint4_t left_samples[nb_samples];
2161 * ---- and if stereo ----
2162 * uint8_t right_control;
2163 * uint4_t right_samples[nb_samples];
2164 *
2165 * Format of the control byte:
2166 * MSB [SSSSRDRR] LSB
2167 * S = (Shift Amount - 2)
2168 * D = Decoder flag.
2169 * R = Reserved
2170 *
2171 * Each block relies on the previous two samples of each channel.
2172 * They should be 0 initially.
2173 */
2174 for (int block = 0; block < avpkt->size / avctx->block_align; block++) {
2175 for (int channel = 0; channel < avctx->channels; channel++) {
2176 ADPCMChannelStatus *cs = c->status + channel;
2177 int control, shift;
2178
2179 samples = samples_p[channel] + block * 32;
2180
2181 /* Get the control byte and decode the samples, 2 at a time. */
2182 control = bytestream2_get_byteu(&gb);
2183 shift = (control >> 4) + 2;
2184
2185 for (int n = 0; n < 16; n++) {
2186 int sample = bytestream2_get_byteu(&gb);
2187 *samples++ = ff_adpcm_argo_expand_nibble(cs, sample >> 4, shift, control & 0x04);
2188 *samples++ = ff_adpcm_argo_expand_nibble(cs, sample >> 0, shift, control & 0x04);
2189 }
2190 }
2191 }
2192 ) /* End of CASE */
2193 ✗ CASE(ADPCM_ZORK,
2194 for (int n = 0; n < nb_samples * avctx->channels; n++) {
2195 int v = bytestream2_get_byteu(&gb);
2196 *samples++ = adpcm_zork_expand_nibble(&c->status[n % avctx->channels], v);
2197 }
2198 ) /* End of CASE */
2199 ✗ CASE(ADPCM_IMA_MTF,
2200 for (int n = nb_samples / 2; n > 0; n--) {
2201 for (int channel = 0; channel < avctx->channels; channel++) {
2202 int v = bytestream2_get_byteu(&gb);
2203 *samples++ = adpcm_ima_mtf_expand_nibble(&c->status[channel], v >> 4);
2204 samples[st] = adpcm_ima_mtf_expand_nibble(&c->status[channel], v & 0x0F);
2205 }
2206 samples += avctx->channels;
2207 }
2208 ) /* End of CASE */
2209 ✗ default:
2210 ✗ av_assert0(0); // unsupported codec_id should not happen
2211 }
2212
2213
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 37569 if (avpkt->size && bytestream2_tell(&gb) == 0) {
2214 ✗ av_log(avctx, AV_LOG_ERROR, "Nothing consumed\n");
2215 ✗ return AVERROR_INVALIDDATA;
2216 }
2217
2218 37569 *got_frame_ptr = 1;
2219
2220
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 37569 if (avpkt->size < bytestream2_tell(&gb)) {
2221 ✗ av_log(avctx, AV_LOG_ERROR, "Overread of %d < %d\n", avpkt->size, bytestream2_tell(&gb));
2222 ✗ return avpkt->size;
2223 }
2224
2225 37569 return bytestream2_tell(&gb);
2226 }
2227
2228 187 static void adpcm_flush(AVCodecContext *avctx)
2229 {
2230 187 ADPCMDecodeContext *c = avctx->priv_data;
2231
2232 /* Just nuke the entire state and re-init. */
2233 187 memset(c, 0, sizeof(ADPCMDecodeContext));
2234
2235
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 187 switch(avctx->codec_id) {
2236 2 case AV_CODEC_ID_ADPCM_CT:
2237 2 c->status[0].step = c->status[1].step = 511;
2238 2 break;
2239
2240 3 case AV_CODEC_ID_ADPCM_IMA_APC:
2241
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 3 if (avctx->extradata && avctx->extradata_size >= 8) {
2242 2 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata ), 18);
2243 2 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 4), 18);
2244 }
2245 3 break;
2246
2247 6 case AV_CODEC_ID_ADPCM_IMA_APM:
2248
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 6 if (avctx->extradata && avctx->extradata_size >= 28) {
2249 6 c->status[0].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 16), 18);
2250 6 c->status[0].step_index = av_clip(AV_RL32(avctx->extradata + 20), 0, 88);
2251 6 c->status[1].predictor = av_clip_intp2(AV_RL32(avctx->extradata + 4), 18);
2252 6 c->status[1].step_index = av_clip(AV_RL32(avctx->extradata + 8), 0, 88);
2253 }
2254 6 break;
2255
2256 8 case AV_CODEC_ID_ADPCM_IMA_WS:
2257
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 8 if (avctx->extradata && avctx->extradata_size >= 2)
2258 5 c->vqa_version = AV_RL16(avctx->extradata);
2259 8 break;
2260 168 default:
2261 /* Other codecs may want to handle this during decoding. */
2262 168 c->has_status = 0;
2263 168 return;
2264 }
2265
2266 19 c->has_status = 1;
2267 }
2268
2269
2270 static const enum AVSampleFormat sample_fmts_s16[] = { AV_SAMPLE_FMT_S16,
2271 AV_SAMPLE_FMT_NONE };
2272 static const enum AVSampleFormat sample_fmts_s16p[] = { AV_SAMPLE_FMT_S16P,
2273 AV_SAMPLE_FMT_NONE };
2274 static const enum AVSampleFormat sample_fmts_both[] = { AV_SAMPLE_FMT_S16,
2275 AV_SAMPLE_FMT_S16P,
2276 AV_SAMPLE_FMT_NONE };
2277
2278 #define ADPCM_DECODER_0(id_, sample_fmts_, name_, long_name_)
2279 #define ADPCM_DECODER_1(id_, sample_fmts_, name_, long_name_) \
2280 const AVCodec ff_ ## name_ ## _decoder = { \
2281 .name = #name_, \
2282 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
2283 .type = AVMEDIA_TYPE_AUDIO, \
2284 .id = id_, \
2285 .priv_data_size = sizeof(ADPCMDecodeContext), \
2286 .init = adpcm_decode_init, \
2287 .decode = adpcm_decode_frame, \
2288 .flush = adpcm_flush, \
2289 .capabilities = AV_CODEC_CAP_DR1, \
2290 .sample_fmts = sample_fmts_, \
2291 .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, \
2292 };
2293 #define ADPCM_DECODER_2(enabled, codec_id, name, sample_fmts, long_name) \
2294 ADPCM_DECODER_ ## enabled(codec_id, name, sample_fmts, long_name)
2295 #define ADPCM_DECODER_3(config, codec_id, name, sample_fmts, long_name) \
2296 ADPCM_DECODER_2(config, codec_id, name, sample_fmts, long_name)
2297 #define ADPCM_DECODER(codec, name, sample_fmts, long_name) \
2298 ADPCM_DECODER_3(CONFIG_ ## codec ## _DECODER, AV_CODEC_ID_ ## codec, \
2299 name, sample_fmts, long_name)
2300
2301 /* Note: Do not forget to add new entries to the Makefile as well. */
2302 ADPCM_DECODER(ADPCM_4XM, sample_fmts_s16p, adpcm_4xm, "ADPCM 4X Movie")
2303 ADPCM_DECODER(ADPCM_AFC, sample_fmts_s16p, adpcm_afc, "ADPCM Nintendo Gamecube AFC")
2304 ADPCM_DECODER(ADPCM_AGM, sample_fmts_s16, adpcm_agm, "ADPCM AmuseGraphics Movie")
2305 ADPCM_DECODER(ADPCM_AICA, sample_fmts_s16p, adpcm_aica, "ADPCM Yamaha AICA")
2306 ADPCM_DECODER(ADPCM_ARGO, sample_fmts_s16p, adpcm_argo, "ADPCM Argonaut Games")
2307 ADPCM_DECODER(ADPCM_CT, sample_fmts_s16, adpcm_ct, "ADPCM Creative Technology")
2308 ADPCM_DECODER(ADPCM_DTK, sample_fmts_s16p, adpcm_dtk, "ADPCM Nintendo Gamecube DTK")
2309 ADPCM_DECODER(ADPCM_EA, sample_fmts_s16, adpcm_ea, "ADPCM Electronic Arts")
2310 ADPCM_DECODER(ADPCM_EA_MAXIS_XA, sample_fmts_s16, adpcm_ea_maxis_xa, "ADPCM Electronic Arts Maxis CDROM XA")
2311 ADPCM_DECODER(ADPCM_EA_R1, sample_fmts_s16p, adpcm_ea_r1, "ADPCM Electronic Arts R1")
2312 ADPCM_DECODER(ADPCM_EA_R2, sample_fmts_s16p, adpcm_ea_r2, "ADPCM Electronic Arts R2")
2313 ADPCM_DECODER(ADPCM_EA_R3, sample_fmts_s16p, adpcm_ea_r3, "ADPCM Electronic Arts R3")
2314 ADPCM_DECODER(ADPCM_EA_XAS, sample_fmts_s16p, adpcm_ea_xas, "ADPCM Electronic Arts XAS")
2315 ADPCM_DECODER(ADPCM_IMA_ACORN, sample_fmts_s16, adpcm_ima_acorn, "ADPCM IMA Acorn Replay")
2316 ADPCM_DECODER(ADPCM_IMA_AMV, sample_fmts_s16, adpcm_ima_amv, "ADPCM IMA AMV")
2317 ADPCM_DECODER(ADPCM_IMA_APC, sample_fmts_s16, adpcm_ima_apc, "ADPCM IMA CRYO APC")
2318 ADPCM_DECODER(ADPCM_IMA_APM, sample_fmts_s16, adpcm_ima_apm, "ADPCM IMA Ubisoft APM")
2319 ADPCM_DECODER(ADPCM_IMA_CUNNING, sample_fmts_s16p, adpcm_ima_cunning, "ADPCM IMA Cunning Developments")
2320 ADPCM_DECODER(ADPCM_IMA_DAT4, sample_fmts_s16, adpcm_ima_dat4, "ADPCM IMA Eurocom DAT4")
2321 ADPCM_DECODER(ADPCM_IMA_DK3, sample_fmts_s16, adpcm_ima_dk3, "ADPCM IMA Duck DK3")
2322 ADPCM_DECODER(ADPCM_IMA_DK4, sample_fmts_s16, adpcm_ima_dk4, "ADPCM IMA Duck DK4")
2323 ADPCM_DECODER(ADPCM_IMA_EA_EACS, sample_fmts_s16, adpcm_ima_ea_eacs, "ADPCM IMA Electronic Arts EACS")
2324 ADPCM_DECODER(ADPCM_IMA_EA_SEAD, sample_fmts_s16, adpcm_ima_ea_sead, "ADPCM IMA Electronic Arts SEAD")
2325 ADPCM_DECODER(ADPCM_IMA_ISS, sample_fmts_s16, adpcm_ima_iss, "ADPCM IMA Funcom ISS")
2326 ADPCM_DECODER(ADPCM_IMA_MOFLEX, sample_fmts_s16p, adpcm_ima_moflex, "ADPCM IMA MobiClip MOFLEX")
2327 ADPCM_DECODER(ADPCM_IMA_MTF, sample_fmts_s16, adpcm_ima_mtf, "ADPCM IMA Capcom's MT Framework")
2328 ADPCM_DECODER(ADPCM_IMA_OKI, sample_fmts_s16, adpcm_ima_oki, "ADPCM IMA Dialogic OKI")
2329 ADPCM_DECODER(ADPCM_IMA_QT, sample_fmts_s16p, adpcm_ima_qt, "ADPCM IMA QuickTime")
2330 ADPCM_DECODER(ADPCM_IMA_RAD, sample_fmts_s16, adpcm_ima_rad, "ADPCM IMA Radical")
2331 ADPCM_DECODER(ADPCM_IMA_SSI, sample_fmts_s16, adpcm_ima_ssi, "ADPCM IMA Simon & Schuster Interactive")
2332 ADPCM_DECODER(ADPCM_IMA_SMJPEG, sample_fmts_s16, adpcm_ima_smjpeg, "ADPCM IMA Loki SDL MJPEG")
2333 ADPCM_DECODER(ADPCM_IMA_ALP, sample_fmts_s16, adpcm_ima_alp, "ADPCM IMA High Voltage Software ALP")
2334 ADPCM_DECODER(ADPCM_IMA_WAV, sample_fmts_s16p, adpcm_ima_wav, "ADPCM IMA WAV")
2335 ADPCM_DECODER(ADPCM_IMA_WS, sample_fmts_both, adpcm_ima_ws, "ADPCM IMA Westwood")
2336 ADPCM_DECODER(ADPCM_MS, sample_fmts_both, adpcm_ms, "ADPCM Microsoft")
2337 ADPCM_DECODER(ADPCM_MTAF, sample_fmts_s16p, adpcm_mtaf, "ADPCM MTAF")
2338 ADPCM_DECODER(ADPCM_PSX, sample_fmts_s16p, adpcm_psx, "ADPCM Playstation")
2339 ADPCM_DECODER(ADPCM_SBPRO_2, sample_fmts_s16, adpcm_sbpro_2, "ADPCM Sound Blaster Pro 2-bit")
2340 ADPCM_DECODER(ADPCM_SBPRO_3, sample_fmts_s16, adpcm_sbpro_3, "ADPCM Sound Blaster Pro 2.6-bit")
2341 ADPCM_DECODER(ADPCM_SBPRO_4, sample_fmts_s16, adpcm_sbpro_4, "ADPCM Sound Blaster Pro 4-bit")
2342 ADPCM_DECODER(ADPCM_SWF, sample_fmts_s16, adpcm_swf, "ADPCM Shockwave Flash")
2343 ADPCM_DECODER(ADPCM_THP_LE, sample_fmts_s16p, adpcm_thp_le, "ADPCM Nintendo THP (little-endian)")
2344 ADPCM_DECODER(ADPCM_THP, sample_fmts_s16p, adpcm_thp, "ADPCM Nintendo THP")
2345 ADPCM_DECODER(ADPCM_XA, sample_fmts_s16p, adpcm_xa, "ADPCM CDROM XA")
2346 ADPCM_DECODER(ADPCM_YAMAHA, sample_fmts_s16, adpcm_yamaha, "ADPCM Yamaha")
2347 ADPCM_DECODER(ADPCM_ZORK, sample_fmts_s16, adpcm_zork, "ADPCM Zork")
2348