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1 | /* |
2 | * Musepack SV8 decoder | |
3 | * Copyright (c) 2007 Konstantin Shishkov | |
4 | * | |
5 | * This file is part of FFmpeg. | |
6 | * | |
7 | * FFmpeg is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; either | |
10 | * version 2.1 of the License, or (at your option) any later version. | |
11 | * | |
12 | * FFmpeg is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with FFmpeg; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | /** | |
23 | * @file | |
24 | * MPEG Audio Layer 1/2 -like codec with frames of 1152 samples | |
25 | * divided into 32 subbands. | |
26 | */ | |
27 | ||
28 | #include "libavutil/channel_layout.h" | |
29 | #include "libavutil/lfg.h" | |
30 | #include "avcodec.h" | |
31 | #include "get_bits.h" | |
32 | #include "internal.h" | |
33 | #include "mpegaudiodsp.h" | |
34 | ||
35 | #include "mpc.h" | |
36 | #include "mpc8data.h" | |
37 | #include "mpc8huff.h" | |
38 | ||
39 | static VLC band_vlc, scfi_vlc[2], dscf_vlc[2], res_vlc[2]; | |
40 | static VLC q1_vlc, q2_vlc[2], q3_vlc[2], quant_vlc[4][2], q9up_vlc; | |
41 | ||
42 | static const int q3_offsets[2] = { MPC8_Q3_OFFSET, MPC8_Q4_OFFSET }; | |
43 | static const int quant_offsets[6] = { MPC8_Q5_OFFSET, MPC8_Q6_OFFSET, MPC8_Q7_OFFSET, MPC8_Q8_OFFSET }; | |
44 | ||
45 | static inline int mpc8_dec_base(GetBitContext *gb, int k, int n) | |
46 | { | |
47 | int len = mpc8_cnk_len[k-1][n-1] - 1; | |
48 | int code = len ? get_bits_long(gb, len) : 0; | |
49 | ||
50 | if (code >= mpc8_cnk_lost[k-1][n-1]) | |
51 | code = ((code << 1) | get_bits1(gb)) - mpc8_cnk_lost[k-1][n-1]; | |
52 | ||
53 | return code; | |
54 | } | |
55 | ||
56 | static inline int mpc8_dec_enum(GetBitContext *gb, int k, int n) | |
57 | { | |
58 | int bits = 0; | |
59 | const uint32_t * C = mpc8_cnk[k-1]; | |
60 | int code = mpc8_dec_base(gb, k, n); | |
61 | ||
62 | do { | |
63 | n--; | |
64 | if (code >= C[n]) { | |
65 | bits |= 1 << n; | |
66 | code -= C[n]; | |
67 | C -= 32; | |
68 | k--; | |
69 | } | |
70 | } while(k > 0); | |
71 | ||
72 | return bits; | |
73 | } | |
74 | ||
75 | static inline int mpc8_get_mod_golomb(GetBitContext *gb, int m) | |
76 | { | |
77 | if(mpc8_cnk_len[0][m] < 1) return 0; | |
78 | return mpc8_dec_base(gb, 1, m+1); | |
79 | } | |
80 | ||
81 | static int mpc8_get_mask(GetBitContext *gb, int size, int t) | |
82 | { | |
83 | int mask = 0; | |
84 | ||
85 | if(t && t != size) | |
86 | mask = mpc8_dec_enum(gb, FFMIN(t, size - t), size); | |
87 | if((t << 1) > size) mask = ~mask; | |
88 | ||
89 | return mask; | |
90 | } | |
91 | ||
92 | static const uint16_t vlc_offsets[13] = { | |
93 | 0, 640, 1184, 1748, 2298, 2426, 2554, 3066, 3578, 4106, 4618, 5196, 5708 | |
94 | }; | |
95 | ||
96 | static av_cold int mpc8_decode_init(AVCodecContext * avctx) | |
97 | { | |
98 | int i; | |
99 | MPCContext *c = avctx->priv_data; | |
100 | GetBitContext gb; | |
101 | static int vlc_initialized = 0; | |
102 | int channels; | |
103 | ||
104 | static VLC_TYPE band_table[542][2]; | |
105 | static VLC_TYPE q1_table[520][2]; | |
106 | static VLC_TYPE q9up_table[524][2]; | |
107 | static VLC_TYPE scfi0_table[1 << MPC8_SCFI0_BITS][2]; | |
108 | static VLC_TYPE scfi1_table[1 << MPC8_SCFI1_BITS][2]; | |
109 | static VLC_TYPE dscf0_table[560][2]; | |
110 | static VLC_TYPE dscf1_table[598][2]; | |
111 | static VLC_TYPE q3_0_table[512][2]; | |
112 | static VLC_TYPE q3_1_table[516][2]; | |
113 | static VLC_TYPE codes_table[5708][2]; | |
114 | ||
115 | if(avctx->extradata_size < 2){ | |
116 | av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size); | |
117 | return -1; | |
118 | } | |
119 | memset(c->oldDSCF, 0, sizeof(c->oldDSCF)); | |
120 | av_lfg_init(&c->rnd, 0xDEADBEEF); | |
121 | ff_mpadsp_init(&c->mpadsp); | |
122 | ||
123 | ff_mpc_init(); | |
124 | ||
125 | init_get_bits(&gb, avctx->extradata, 16); | |
126 | ||
127 | skip_bits(&gb, 3);//sample rate | |
128 | c->maxbands = get_bits(&gb, 5) + 1; | |
129 | if (c->maxbands >= BANDS) { | |
130 | av_log(avctx,AV_LOG_ERROR, "maxbands %d too high\n", c->maxbands); | |
131 | return AVERROR_INVALIDDATA; | |
132 | } | |
133 | channels = get_bits(&gb, 4) + 1; | |
134 | if (channels > 2) { | |
135 | avpriv_request_sample(avctx, "Multichannel MPC SV8"); | |
136 | return AVERROR_PATCHWELCOME; | |
137 | } | |
138 | c->MSS = get_bits1(&gb); | |
139 | c->frames = 1 << (get_bits(&gb, 3) * 2); | |
140 | ||
141 | avctx->sample_fmt = AV_SAMPLE_FMT_S16P; | |
142 | avctx->channel_layout = (channels==2) ? AV_CH_LAYOUT_STEREO : AV_CH_LAYOUT_MONO; | |
143 | avctx->channels = channels; | |
144 | ||
145 | if(vlc_initialized) return 0; | |
146 | av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n"); | |
147 | ||
148 | band_vlc.table = band_table; | |
149 | band_vlc.table_allocated = 542; | |
150 | init_vlc(&band_vlc, MPC8_BANDS_BITS, MPC8_BANDS_SIZE, | |
151 | mpc8_bands_bits, 1, 1, | |
152 | mpc8_bands_codes, 1, 1, INIT_VLC_USE_NEW_STATIC); | |
153 | ||
154 | q1_vlc.table = q1_table; | |
155 | q1_vlc.table_allocated = 520; | |
156 | init_vlc(&q1_vlc, MPC8_Q1_BITS, MPC8_Q1_SIZE, | |
157 | mpc8_q1_bits, 1, 1, | |
158 | mpc8_q1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC); | |
159 | q9up_vlc.table = q9up_table; | |
160 | q9up_vlc.table_allocated = 524; | |
161 | init_vlc(&q9up_vlc, MPC8_Q9UP_BITS, MPC8_Q9UP_SIZE, | |
162 | mpc8_q9up_bits, 1, 1, | |
163 | mpc8_q9up_codes, 1, 1, INIT_VLC_USE_NEW_STATIC); | |
164 | ||
165 | scfi_vlc[0].table = scfi0_table; | |
166 | scfi_vlc[0].table_allocated = 1 << MPC8_SCFI0_BITS; | |
167 | init_vlc(&scfi_vlc[0], MPC8_SCFI0_BITS, MPC8_SCFI0_SIZE, | |
168 | mpc8_scfi0_bits, 1, 1, | |
169 | mpc8_scfi0_codes, 1, 1, INIT_VLC_USE_NEW_STATIC); | |
170 | scfi_vlc[1].table = scfi1_table; | |
171 | scfi_vlc[1].table_allocated = 1 << MPC8_SCFI1_BITS; | |
172 | init_vlc(&scfi_vlc[1], MPC8_SCFI1_BITS, MPC8_SCFI1_SIZE, | |
173 | mpc8_scfi1_bits, 1, 1, | |
174 | mpc8_scfi1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC); | |
175 | ||
176 | dscf_vlc[0].table = dscf0_table; | |
177 | dscf_vlc[0].table_allocated = 560; | |
178 | init_vlc(&dscf_vlc[0], MPC8_DSCF0_BITS, MPC8_DSCF0_SIZE, | |
179 | mpc8_dscf0_bits, 1, 1, | |
180 | mpc8_dscf0_codes, 1, 1, INIT_VLC_USE_NEW_STATIC); | |
181 | dscf_vlc[1].table = dscf1_table; | |
182 | dscf_vlc[1].table_allocated = 598; | |
183 | init_vlc(&dscf_vlc[1], MPC8_DSCF1_BITS, MPC8_DSCF1_SIZE, | |
184 | mpc8_dscf1_bits, 1, 1, | |
185 | mpc8_dscf1_codes, 1, 1, INIT_VLC_USE_NEW_STATIC); | |
186 | ||
187 | q3_vlc[0].table = q3_0_table; | |
188 | q3_vlc[0].table_allocated = 512; | |
189 | ff_init_vlc_sparse(&q3_vlc[0], MPC8_Q3_BITS, MPC8_Q3_SIZE, | |
190 | mpc8_q3_bits, 1, 1, | |
191 | mpc8_q3_codes, 1, 1, | |
192 | mpc8_q3_syms, 1, 1, INIT_VLC_USE_NEW_STATIC); | |
193 | q3_vlc[1].table = q3_1_table; | |
194 | q3_vlc[1].table_allocated = 516; | |
195 | ff_init_vlc_sparse(&q3_vlc[1], MPC8_Q4_BITS, MPC8_Q4_SIZE, | |
196 | mpc8_q4_bits, 1, 1, | |
197 | mpc8_q4_codes, 1, 1, | |
198 | mpc8_q4_syms, 1, 1, INIT_VLC_USE_NEW_STATIC); | |
199 | ||
200 | for(i = 0; i < 2; i++){ | |
201 | res_vlc[i].table = &codes_table[vlc_offsets[0+i]]; | |
202 | res_vlc[i].table_allocated = vlc_offsets[1+i] - vlc_offsets[0+i]; | |
203 | init_vlc(&res_vlc[i], MPC8_RES_BITS, MPC8_RES_SIZE, | |
204 | &mpc8_res_bits[i], 1, 1, | |
205 | &mpc8_res_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC); | |
206 | ||
207 | q2_vlc[i].table = &codes_table[vlc_offsets[2+i]]; | |
208 | q2_vlc[i].table_allocated = vlc_offsets[3+i] - vlc_offsets[2+i]; | |
209 | init_vlc(&q2_vlc[i], MPC8_Q2_BITS, MPC8_Q2_SIZE, | |
210 | &mpc8_q2_bits[i], 1, 1, | |
211 | &mpc8_q2_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC); | |
212 | ||
213 | quant_vlc[0][i].table = &codes_table[vlc_offsets[4+i]]; | |
214 | quant_vlc[0][i].table_allocated = vlc_offsets[5+i] - vlc_offsets[4+i]; | |
215 | init_vlc(&quant_vlc[0][i], MPC8_Q5_BITS, MPC8_Q5_SIZE, | |
216 | &mpc8_q5_bits[i], 1, 1, | |
217 | &mpc8_q5_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC); | |
218 | quant_vlc[1][i].table = &codes_table[vlc_offsets[6+i]]; | |
219 | quant_vlc[1][i].table_allocated = vlc_offsets[7+i] - vlc_offsets[6+i]; | |
220 | init_vlc(&quant_vlc[1][i], MPC8_Q6_BITS, MPC8_Q6_SIZE, | |
221 | &mpc8_q6_bits[i], 1, 1, | |
222 | &mpc8_q6_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC); | |
223 | quant_vlc[2][i].table = &codes_table[vlc_offsets[8+i]]; | |
224 | quant_vlc[2][i].table_allocated = vlc_offsets[9+i] - vlc_offsets[8+i]; | |
225 | init_vlc(&quant_vlc[2][i], MPC8_Q7_BITS, MPC8_Q7_SIZE, | |
226 | &mpc8_q7_bits[i], 1, 1, | |
227 | &mpc8_q7_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC); | |
228 | quant_vlc[3][i].table = &codes_table[vlc_offsets[10+i]]; | |
229 | quant_vlc[3][i].table_allocated = vlc_offsets[11+i] - vlc_offsets[10+i]; | |
230 | init_vlc(&quant_vlc[3][i], MPC8_Q8_BITS, MPC8_Q8_SIZE, | |
231 | &mpc8_q8_bits[i], 1, 1, | |
232 | &mpc8_q8_codes[i], 1, 1, INIT_VLC_USE_NEW_STATIC); | |
233 | } | |
234 | vlc_initialized = 1; | |
235 | ||
236 | return 0; | |
237 | } | |
238 | ||
239 | static int mpc8_decode_frame(AVCodecContext * avctx, void *data, | |
240 | int *got_frame_ptr, AVPacket *avpkt) | |
241 | { | |
242 | AVFrame *frame = data; | |
243 | const uint8_t *buf = avpkt->data; | |
244 | int buf_size = avpkt->size; | |
245 | MPCContext *c = avctx->priv_data; | |
246 | GetBitContext gb2, *gb = &gb2; | |
247 | int i, j, k, ch, cnt, res, t; | |
248 | Band *bands = c->bands; | |
249 | int off; | |
250 | int maxband, keyframe; | |
251 | int last[2]; | |
252 | ||
253 | /* get output buffer */ | |
254 | frame->nb_samples = MPC_FRAME_SIZE; | |
255 | if ((res = ff_get_buffer(avctx, frame, 0)) < 0) | |
256 | return res; | |
257 | ||
258 | keyframe = c->cur_frame == 0; | |
259 | ||
260 | if(keyframe){ | |
261 | memset(c->Q, 0, sizeof(c->Q)); | |
262 | c->last_bits_used = 0; | |
263 | } | |
264 | init_get_bits(gb, buf, buf_size * 8); | |
265 | skip_bits(gb, c->last_bits_used & 7); | |
266 | ||
267 | if(keyframe) | |
268 | maxband = mpc8_get_mod_golomb(gb, c->maxbands + 1); | |
269 | else{ | |
270 | maxband = c->last_max_band + get_vlc2(gb, band_vlc.table, MPC8_BANDS_BITS, 2); | |
271 | if(maxband > 32) maxband -= 33; | |
272 | } | |
273 | ||
274 | if(maxband > c->maxbands + 1) { | |
275 | av_log(avctx, AV_LOG_ERROR, "maxband %d too large\n",maxband); | |
276 | return AVERROR_INVALIDDATA; | |
277 | } | |
278 | c->last_max_band = maxband; | |
279 | ||
280 | /* read subband indexes */ | |
281 | if(maxband){ | |
282 | last[0] = last[1] = 0; | |
283 | for(i = maxband - 1; i >= 0; i--){ | |
284 | for(ch = 0; ch < 2; ch++){ | |
285 | last[ch] = get_vlc2(gb, res_vlc[last[ch] > 2].table, MPC8_RES_BITS, 2) + last[ch]; | |
286 | if(last[ch] > 15) last[ch] -= 17; | |
287 | bands[i].res[ch] = last[ch]; | |
288 | } | |
289 | } | |
290 | if(c->MSS){ | |
291 | int mask; | |
292 | ||
293 | cnt = 0; | |
294 | for(i = 0; i < maxband; i++) | |
295 | if(bands[i].res[0] || bands[i].res[1]) | |
296 | cnt++; | |
297 | t = mpc8_get_mod_golomb(gb, cnt); | |
298 | mask = mpc8_get_mask(gb, cnt, t); | |
299 | for(i = maxband - 1; i >= 0; i--) | |
300 | if(bands[i].res[0] || bands[i].res[1]){ | |
301 | bands[i].msf = mask & 1; | |
302 | mask >>= 1; | |
303 | } | |
304 | } | |
305 | } | |
306 | for(i = maxband; i < c->maxbands; i++) | |
307 | bands[i].res[0] = bands[i].res[1] = 0; | |
308 | ||
309 | if(keyframe){ | |
310 | for(i = 0; i < 32; i++) | |
311 | c->oldDSCF[0][i] = c->oldDSCF[1][i] = 1; | |
312 | } | |
313 | ||
314 | for(i = 0; i < maxband; i++){ | |
315 | if(bands[i].res[0] || bands[i].res[1]){ | |
316 | cnt = !!bands[i].res[0] + !!bands[i].res[1] - 1; | |
317 | if(cnt >= 0){ | |
318 | t = get_vlc2(gb, scfi_vlc[cnt].table, scfi_vlc[cnt].bits, 1); | |
319 | if(bands[i].res[0]) bands[i].scfi[0] = t >> (2 * cnt); | |
320 | if(bands[i].res[1]) bands[i].scfi[1] = t & 3; | |
321 | } | |
322 | } | |
323 | } | |
324 | ||
325 | for(i = 0; i < maxband; i++){ | |
326 | for(ch = 0; ch < 2; ch++){ | |
327 | if(!bands[i].res[ch]) continue; | |
328 | ||
329 | if(c->oldDSCF[ch][i]){ | |
330 | bands[i].scf_idx[ch][0] = get_bits(gb, 7) - 6; | |
331 | c->oldDSCF[ch][i] = 0; | |
332 | }else{ | |
333 | t = get_vlc2(gb, dscf_vlc[1].table, MPC8_DSCF1_BITS, 2); | |
334 | if(t == 64) | |
335 | t += get_bits(gb, 6); | |
336 | bands[i].scf_idx[ch][0] = ((bands[i].scf_idx[ch][2] + t - 25) & 0x7F) - 6; | |
337 | } | |
338 | for(j = 0; j < 2; j++){ | |
339 | if((bands[i].scfi[ch] << j) & 2) | |
340 | bands[i].scf_idx[ch][j + 1] = bands[i].scf_idx[ch][j]; | |
341 | else{ | |
342 | t = get_vlc2(gb, dscf_vlc[0].table, MPC8_DSCF0_BITS, 2); | |
343 | if(t == 31) | |
344 | t = 64 + get_bits(gb, 6); | |
345 | bands[i].scf_idx[ch][j + 1] = ((bands[i].scf_idx[ch][j] + t - 25) & 0x7F) - 6; | |
346 | } | |
347 | } | |
348 | } | |
349 | } | |
350 | ||
351 | for(i = 0, off = 0; i < maxband; i++, off += SAMPLES_PER_BAND){ | |
352 | for(ch = 0; ch < 2; ch++){ | |
353 | res = bands[i].res[ch]; | |
354 | switch(res){ | |
355 | case -1: | |
356 | for(j = 0; j < SAMPLES_PER_BAND; j++) | |
357 | c->Q[ch][off + j] = (av_lfg_get(&c->rnd) & 0x3FC) - 510; | |
358 | break; | |
359 | case 0: | |
360 | break; | |
361 | case 1: | |
362 | for(j = 0; j < SAMPLES_PER_BAND; j += SAMPLES_PER_BAND / 2){ | |
363 | cnt = get_vlc2(gb, q1_vlc.table, MPC8_Q1_BITS, 2); | |
364 | t = mpc8_get_mask(gb, 18, cnt); | |
365 | for(k = 0; k < SAMPLES_PER_BAND / 2; k++, t <<= 1) | |
366 | c->Q[ch][off + j + k] = (t & 0x20000) ? (get_bits1(gb) << 1) - 1 : 0; | |
367 | } | |
368 | break; | |
369 | case 2: | |
370 | cnt = 6;//2*mpc8_thres[res] | |
371 | for(j = 0; j < SAMPLES_PER_BAND; j += 3){ | |
372 | t = get_vlc2(gb, q2_vlc[cnt > 3].table, MPC8_Q2_BITS, 2); | |
373 | c->Q[ch][off + j + 0] = mpc8_idx50[t]; | |
374 | c->Q[ch][off + j + 1] = mpc8_idx51[t]; | |
375 | c->Q[ch][off + j + 2] = mpc8_idx52[t]; | |
376 | cnt = (cnt >> 1) + mpc8_huffq2[t]; | |
377 | } | |
378 | break; | |
379 | case 3: | |
380 | case 4: | |
381 | for(j = 0; j < SAMPLES_PER_BAND; j += 2){ | |
382 | t = get_vlc2(gb, q3_vlc[res - 3].table, MPC8_Q3_BITS, 2) + q3_offsets[res - 3]; | |
383 | c->Q[ch][off + j + 1] = t >> 4; | |
384 | c->Q[ch][off + j + 0] = (t & 8) ? (t & 0xF) - 16 : (t & 0xF); | |
385 | } | |
386 | break; | |
387 | case 5: | |
388 | case 6: | |
389 | case 7: | |
390 | case 8: | |
391 | cnt = 2 * mpc8_thres[res]; | |
392 | for(j = 0; j < SAMPLES_PER_BAND; j++){ | |
393 | t = get_vlc2(gb, quant_vlc[res - 5][cnt > mpc8_thres[res]].table, quant_vlc[res - 5][cnt > mpc8_thres[res]].bits, 2) + quant_offsets[res - 5]; | |
394 | c->Q[ch][off + j] = t; | |
395 | cnt = (cnt >> 1) + FFABS(c->Q[ch][off + j]); | |
396 | } | |
397 | break; | |
398 | default: | |
399 | for(j = 0; j < SAMPLES_PER_BAND; j++){ | |
400 | c->Q[ch][off + j] = get_vlc2(gb, q9up_vlc.table, MPC8_Q9UP_BITS, 2); | |
401 | if(res != 9){ | |
402 | c->Q[ch][off + j] <<= res - 9; | |
403 | c->Q[ch][off + j] |= get_bits(gb, res - 9); | |
404 | } | |
405 | c->Q[ch][off + j] -= (1 << (res - 2)) - 1; | |
406 | } | |
407 | } | |
408 | } | |
409 | } | |
410 | ||
411 | ff_mpc_dequantize_and_synth(c, maxband - 1, | |
412 | (int16_t **)frame->extended_data, | |
413 | avctx->channels); | |
414 | ||
415 | c->cur_frame++; | |
416 | ||
417 | c->last_bits_used = get_bits_count(gb); | |
418 | if(get_bits_left(gb) < 8) // we have only padding left | |
419 | c->last_bits_used = buf_size << 3; | |
420 | if(c->cur_frame >= c->frames) | |
421 | c->cur_frame = 0; | |
422 | ||
423 | *got_frame_ptr = 1; | |
424 | ||
425 | return c->cur_frame ? c->last_bits_used >> 3 : buf_size; | |
426 | } | |
427 | ||
428 | static av_cold void mpc8_decode_flush(AVCodecContext *avctx) | |
429 | { | |
430 | MPCContext *c = avctx->priv_data; | |
431 | c->cur_frame = 0; | |
432 | } | |
433 | ||
434 | AVCodec ff_mpc8_decoder = { | |
435 | .name = "mpc8", | |
436 | .long_name = NULL_IF_CONFIG_SMALL("Musepack SV8"), | |
437 | .type = AVMEDIA_TYPE_AUDIO, | |
438 | .id = AV_CODEC_ID_MUSEPACK8, | |
439 | .priv_data_size = sizeof(MPCContext), | |
440 | .init = mpc8_decode_init, | |
441 | .decode = mpc8_decode_frame, | |
442 | .flush = mpc8_decode_flush, | |
443 | .capabilities = CODEC_CAP_DR1, | |
444 | .sample_fmts = (const enum AVSampleFormat[]) { AV_SAMPLE_FMT_S16P, | |
445 | AV_SAMPLE_FMT_NONE }, | |
446 | }; |