FFmpeg
 All Data Structures Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
pcm.c
Go to the documentation of this file.
1 /*
2  * PCM codecs
3  * Copyright (c) 2001 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * PCM codecs
25  */
26 
27 #include "libavutil/attributes.h"
28 #include "avcodec.h"
29 #include "bytestream.h"
30 #include "internal.h"
31 #include "mathops.h"
32 #include "pcm_tablegen.h"
33 
34 static av_cold int pcm_encode_init(AVCodecContext *avctx)
35 {
36  avctx->frame_size = 0;
37  switch (avctx->codec->id) {
38  case AV_CODEC_ID_PCM_ALAW:
39  pcm_alaw_tableinit();
40  break;
41  case AV_CODEC_ID_PCM_MULAW:
42  pcm_ulaw_tableinit();
43  break;
44  default:
45  break;
46  }
47 
48  avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);
49  avctx->block_align = avctx->channels * avctx->bits_per_coded_sample / 8;
50  avctx->bit_rate = avctx->block_align * avctx->sample_rate * 8;
51  avctx->coded_frame = avcodec_alloc_frame();
52  if (!avctx->coded_frame)
53  return AVERROR(ENOMEM);
54 
55  return 0;
56 }
57 
58 static av_cold int pcm_encode_close(AVCodecContext *avctx)
59 {
60  av_freep(&avctx->coded_frame);
61 
62  return 0;
63 }
64 
65 /**
66  * Write PCM samples macro
67  * @param type Datatype of native machine format
68  * @param endian bytestream_put_xxx() suffix
69  * @param src Source pointer (variable name)
70  * @param dst Destination pointer (variable name)
71  * @param n Total number of samples (variable name)
72  * @param shift Bitshift (bits)
73  * @param offset Sample value offset
74  */
75 #define ENCODE(type, endian, src, dst, n, shift, offset) \
76  samples_ ## type = (const type *) src; \
77  for (; n > 0; n--) { \
78  register type v = (*samples_ ## type++ >> shift) + offset; \
79  bytestream_put_ ## endian(&dst, v); \
80  }
81 
82 #define ENCODE_PLANAR(type, endian, dst, n, shift, offset) \
83  n /= avctx->channels; \
84  for (c = 0; c < avctx->channels; c++) { \
85  int i; \
86  samples_ ## type = (const type *) frame->extended_data[c]; \
87  for (i = n; i > 0; i--) { \
88  register type v = (*samples_ ## type++ >> shift) + offset; \
89  bytestream_put_ ## endian(&dst, v); \
90  } \
91  }
92 
93 static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
94  const AVFrame *frame, int *got_packet_ptr)
95 {
96  int n, c, sample_size, v, ret;
97  const short *samples;
98  unsigned char *dst;
99  const uint8_t *samples_uint8_t;
100  const int16_t *samples_int16_t;
101  const int32_t *samples_int32_t;
102  const int64_t *samples_int64_t;
103  const uint16_t *samples_uint16_t;
104  const uint32_t *samples_uint32_t;
105 
106  sample_size = av_get_bits_per_sample(avctx->codec->id) / 8;
107  n = frame->nb_samples * avctx->channels;
108  samples = (const short *)frame->data[0];
109 
110  if ((ret = ff_alloc_packet2(avctx, avpkt, n * sample_size)) < 0)
111  return ret;
112  dst = avpkt->data;
113 
114  switch (avctx->codec->id) {
115  case AV_CODEC_ID_PCM_U32LE:
116  ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
117  break;
118  case AV_CODEC_ID_PCM_U32BE:
119  ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
120  break;
121  case AV_CODEC_ID_PCM_S24LE:
122  ENCODE(int32_t, le24, samples, dst, n, 8, 0)
123  break;
124  case AV_CODEC_ID_PCM_S24LE_PLANAR:
125  ENCODE_PLANAR(int32_t, le24, dst, n, 8, 0)
126  break;
127  case AV_CODEC_ID_PCM_S24BE:
128  ENCODE(int32_t, be24, samples, dst, n, 8, 0)
129  break;
130  case AV_CODEC_ID_PCM_U24LE:
131  ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
132  break;
133  case AV_CODEC_ID_PCM_U24BE:
134  ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
135  break;
136  case AV_CODEC_ID_PCM_S24DAUD:
137  for (; n > 0; n--) {
138  uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
139  (ff_reverse[*samples & 0xff] << 8);
140  tmp <<= 4; // sync flags would go here
141  bytestream_put_be24(&dst, tmp);
142  samples++;
143  }
144  break;
145  case AV_CODEC_ID_PCM_U16LE:
146  ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
147  break;
148  case AV_CODEC_ID_PCM_U16BE:
149  ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
150  break;
151  case AV_CODEC_ID_PCM_S8:
152  ENCODE(uint8_t, byte, samples, dst, n, 0, -128)
153  break;
154  case AV_CODEC_ID_PCM_S8_PLANAR:
155  ENCODE_PLANAR(uint8_t, byte, dst, n, 0, -128)
156  break;
157 #if HAVE_BIGENDIAN
158  case AV_CODEC_ID_PCM_F64LE:
159  ENCODE(int64_t, le64, samples, dst, n, 0, 0)
160  break;
161  case AV_CODEC_ID_PCM_S32LE:
162  case AV_CODEC_ID_PCM_F32LE:
163  ENCODE(int32_t, le32, samples, dst, n, 0, 0)
164  break;
165  case AV_CODEC_ID_PCM_S32LE_PLANAR:
166  ENCODE_PLANAR(int32_t, le32, dst, n, 0, 0)
167  break;
168  case AV_CODEC_ID_PCM_S16LE:
169  ENCODE(int16_t, le16, samples, dst, n, 0, 0)
170  break;
171  case AV_CODEC_ID_PCM_S16LE_PLANAR:
172  ENCODE_PLANAR(int16_t, le16, dst, n, 0, 0)
173  break;
174  case AV_CODEC_ID_PCM_F64BE:
175  case AV_CODEC_ID_PCM_F32BE:
176  case AV_CODEC_ID_PCM_S32BE:
177  case AV_CODEC_ID_PCM_S16BE:
178 #else
179  case AV_CODEC_ID_PCM_F64BE:
180  ENCODE(int64_t, be64, samples, dst, n, 0, 0)
181  break;
182  case AV_CODEC_ID_PCM_F32BE:
183  case AV_CODEC_ID_PCM_S32BE:
184  ENCODE(int32_t, be32, samples, dst, n, 0, 0)
185  break;
186  case AV_CODEC_ID_PCM_S16BE:
187  ENCODE(int16_t, be16, samples, dst, n, 0, 0)
188  break;
189  case AV_CODEC_ID_PCM_S16BE_PLANAR:
190  ENCODE_PLANAR(int16_t, be16, dst, n, 0, 0)
191  break;
192  case AV_CODEC_ID_PCM_F64LE:
193  case AV_CODEC_ID_PCM_F32LE:
194  case AV_CODEC_ID_PCM_S32LE:
195  case AV_CODEC_ID_PCM_S16LE:
196 #endif /* HAVE_BIGENDIAN */
197  case AV_CODEC_ID_PCM_U8:
198  memcpy(dst, samples, n * sample_size);
199  break;
200 #if HAVE_BIGENDIAN
201  case AV_CODEC_ID_PCM_S16BE_PLANAR:
202 #else
203  case AV_CODEC_ID_PCM_S16LE_PLANAR:
204  case AV_CODEC_ID_PCM_S32LE_PLANAR:
205 #endif /* HAVE_BIGENDIAN */
206  n /= avctx->channels;
207  for (c = 0; c < avctx->channels; c++) {
208  const uint8_t *src = frame->extended_data[c];
209  bytestream_put_buffer(&dst, src, n * sample_size);
210  }
211  break;
212  case AV_CODEC_ID_PCM_ALAW:
213  for (; n > 0; n--) {
214  v = *samples++;
215  *dst++ = linear_to_alaw[(v + 32768) >> 2];
216  }
217  break;
218  case AV_CODEC_ID_PCM_MULAW:
219  for (; n > 0; n--) {
220  v = *samples++;
221  *dst++ = linear_to_ulaw[(v + 32768) >> 2];
222  }
223  break;
224  default:
225  return -1;
226  }
227 
228  *got_packet_ptr = 1;
229  return 0;
230 }
231 
232 typedef struct PCMDecode {
233  short table[256];
234 } PCMDecode;
235 
236 static av_cold int pcm_decode_init(AVCodecContext *avctx)
237 {
238  PCMDecode *s = avctx->priv_data;
239  int i;
240 
241  if (avctx->channels <= 0) {
242  av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
243  return AVERROR(EINVAL);
244  }
245 
246  switch (avctx->codec_id) {
247  case AV_CODEC_ID_PCM_ALAW:
248  for (i = 0; i < 256; i++)
249  s->table[i] = alaw2linear(i);
250  break;
251  case AV_CODEC_ID_PCM_MULAW:
252  for (i = 0; i < 256; i++)
253  s->table[i] = ulaw2linear(i);
254  break;
255  default:
256  break;
257  }
258 
259  avctx->sample_fmt = avctx->codec->sample_fmts[0];
260 
261  if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
262  avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec_id);
263 
264  return 0;
265 }
266 
267 /**
268  * Read PCM samples macro
269  * @param size Data size of native machine format
270  * @param endian bytestream_get_xxx() endian suffix
271  * @param src Source pointer (variable name)
272  * @param dst Destination pointer (variable name)
273  * @param n Total number of samples (variable name)
274  * @param shift Bitshift (bits)
275  * @param offset Sample value offset
276  */
277 #define DECODE(size, endian, src, dst, n, shift, offset) \
278  for (; n > 0; n--) { \
279  uint ## size ## _t v = bytestream_get_ ## endian(&src); \
280  AV_WN ## size ## A(dst, (v - offset) << shift); \
281  dst += size / 8; \
282  }
283 
284 #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) \
285  n /= avctx->channels; \
286  for (c = 0; c < avctx->channels; c++) { \
287  int i; \
288  dst = frame->extended_data[c]; \
289  for (i = n; i > 0; i--) { \
290  uint ## size ## _t v = bytestream_get_ ## endian(&src); \
291  AV_WN ## size ## A(dst, (v - offset) << shift); \
292  dst += size / 8; \
293  } \
294  }
295 
296 static int pcm_decode_frame(AVCodecContext *avctx, void *data,
297  int *got_frame_ptr, AVPacket *avpkt)
298 {
299  const uint8_t *src = avpkt->data;
300  int buf_size = avpkt->size;
301  PCMDecode *s = avctx->priv_data;
302  AVFrame *frame = data;
303  int sample_size, c, n, ret, samples_per_block;
304  uint8_t *samples;
305  int32_t *dst_int32_t;
306 
307  sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
308 
309  /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */
310  samples_per_block = 1;
311  if (AV_CODEC_ID_PCM_DVD == avctx->codec_id) {
312  if (avctx->bits_per_coded_sample != 20 &&
313  avctx->bits_per_coded_sample != 24) {
314  av_log(avctx, AV_LOG_ERROR,
315  "PCM DVD unsupported sample depth %i\n",
316  avctx->bits_per_coded_sample);
317  return AVERROR(EINVAL);
318  }
319  /* 2 samples are interleaved per block in PCM_DVD */
320  samples_per_block = 2;
321  sample_size = avctx->bits_per_coded_sample * 2 / 8;
322  } else if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
323  /* we process 40-bit blocks per channel for LXF */
324  samples_per_block = 2;
325  sample_size = 5;
326  }
327 
328  if (sample_size == 0) {
329  av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
330  return AVERROR(EINVAL);
331  }
332 
333  if (avctx->channels == 0) {
334  av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
335  return AVERROR(EINVAL);
336  }
337 
338  if (avctx->codec_id != avctx->codec->id) {
339  av_log(avctx, AV_LOG_ERROR, "codec ids mismatch\n");
340  return AVERROR(EINVAL);
341  }
342 
343  n = avctx->channels * sample_size;
344 
345  if (n && buf_size % n) {
346  if (buf_size < n) {
347  av_log(avctx, AV_LOG_ERROR,
348  "Invalid PCM packet, data has size %d but at least a size of %d was expected\n",
349  buf_size, n);
350  return AVERROR_INVALIDDATA;
351  } else
352  buf_size -= buf_size % n;
353  }
354 
355  n = buf_size / sample_size;
356 
357  /* get output buffer */
358  frame->nb_samples = n * samples_per_block / avctx->channels;
359  if ((ret = ff_get_buffer(avctx, frame)) < 0) {
360  av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
361  return ret;
362  }
363  samples = frame->data[0];
364 
365  switch (avctx->codec_id) {
366  case AV_CODEC_ID_PCM_U32LE:
367  DECODE(32, le32, src, samples, n, 0, 0x80000000)
368  break;
369  case AV_CODEC_ID_PCM_U32BE:
370  DECODE(32, be32, src, samples, n, 0, 0x80000000)
371  break;
372  case AV_CODEC_ID_PCM_S24LE:
373  DECODE(32, le24, src, samples, n, 8, 0)
374  break;
375  case AV_CODEC_ID_PCM_S24LE_PLANAR:
376  DECODE_PLANAR(32, le24, src, samples, n, 8, 0);
377  break;
378  case AV_CODEC_ID_PCM_S24BE:
379  DECODE(32, be24, src, samples, n, 8, 0)
380  break;
381  case AV_CODEC_ID_PCM_U24LE:
382  DECODE(32, le24, src, samples, n, 8, 0x800000)
383  break;
384  case AV_CODEC_ID_PCM_U24BE:
385  DECODE(32, be24, src, samples, n, 8, 0x800000)
386  break;
387  case AV_CODEC_ID_PCM_S24DAUD:
388  for (; n > 0; n--) {
389  uint32_t v = bytestream_get_be24(&src);
390  v >>= 4; // sync flags are here
391  AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +
392  (ff_reverse[v & 0xff] << 8));
393  samples += 2;
394  }
395  break;
396  case AV_CODEC_ID_PCM_U16LE:
397  DECODE(16, le16, src, samples, n, 0, 0x8000)
398  break;
399  case AV_CODEC_ID_PCM_U16BE:
400  DECODE(16, be16, src, samples, n, 0, 0x8000)
401  break;
402  case AV_CODEC_ID_PCM_S8:
403  for (; n > 0; n--)
404  *samples++ = *src++ + 128;
405  break;
406  case AV_CODEC_ID_PCM_S8_PLANAR:
407  n /= avctx->channels;
408  for (c = 0; c < avctx->channels; c++) {
409  int i;
410  samples = frame->extended_data[c];
411  for (i = n; i > 0; i--)
412  *samples++ = *src++ + 128;
413  }
414  break;
415 #if HAVE_BIGENDIAN
416  case AV_CODEC_ID_PCM_F64LE:
417  DECODE(64, le64, src, samples, n, 0, 0)
418  break;
419  case AV_CODEC_ID_PCM_S32LE:
420  case AV_CODEC_ID_PCM_F32LE:
421  DECODE(32, le32, src, samples, n, 0, 0)
422  break;
423  case AV_CODEC_ID_PCM_S32LE_PLANAR:
424  DECODE_PLANAR(32, le32, src, samples, n, 0, 0);
425  break;
426  case AV_CODEC_ID_PCM_S16LE:
427  DECODE(16, le16, src, samples, n, 0, 0)
428  break;
429  case AV_CODEC_ID_PCM_S16LE_PLANAR:
430  DECODE_PLANAR(16, le16, src, samples, n, 0, 0);
431  break;
432  case AV_CODEC_ID_PCM_F64BE:
433  case AV_CODEC_ID_PCM_F32BE:
434  case AV_CODEC_ID_PCM_S32BE:
435  case AV_CODEC_ID_PCM_S16BE:
436 #else
437  case AV_CODEC_ID_PCM_F64BE:
438  DECODE(64, be64, src, samples, n, 0, 0)
439  break;
440  case AV_CODEC_ID_PCM_F32BE:
441  case AV_CODEC_ID_PCM_S32BE:
442  DECODE(32, be32, src, samples, n, 0, 0)
443  break;
444  case AV_CODEC_ID_PCM_S16BE:
445  DECODE(16, be16, src, samples, n, 0, 0)
446  break;
447  case AV_CODEC_ID_PCM_S16BE_PLANAR:
448  DECODE_PLANAR(16, be16, src, samples, n, 0, 0);
449  break;
450  case AV_CODEC_ID_PCM_F64LE:
451  case AV_CODEC_ID_PCM_F32LE:
452  case AV_CODEC_ID_PCM_S32LE:
453  case AV_CODEC_ID_PCM_S16LE:
454 #endif /* HAVE_BIGENDIAN */
455  case AV_CODEC_ID_PCM_U8:
456  memcpy(samples, src, n * sample_size);
457  break;
458 #if HAVE_BIGENDIAN
459  case AV_CODEC_ID_PCM_S16BE_PLANAR:
460 #else
461  case AV_CODEC_ID_PCM_S16LE_PLANAR:
462  case AV_CODEC_ID_PCM_S32LE_PLANAR:
463 #endif /* HAVE_BIGENDIAN */
464  n /= avctx->channels;
465  for (c = 0; c < avctx->channels; c++) {
466  samples = frame->extended_data[c];
467  bytestream_get_buffer(&src, samples, n * sample_size);
468  }
469  break;
470  case AV_CODEC_ID_PCM_ZORK:
471  for (; n > 0; n--) {
472  int v = *src++;
473  if (v < 128)
474  v = 128 - v;
475  *samples++ = v;
476  }
477  break;
478  case AV_CODEC_ID_PCM_ALAW:
479  case AV_CODEC_ID_PCM_MULAW:
480  for (; n > 0; n--) {
481  AV_WN16A(samples, s->table[*src++]);
482  samples += 2;
483  }
484  break;
485  case AV_CODEC_ID_PCM_DVD:
486  {
487  const uint8_t *src8;
488  dst_int32_t = (int32_t *)frame->data[0];
489  n /= avctx->channels;
490  switch (avctx->bits_per_coded_sample) {
491  case 20:
492  while (n--) {
493  c = avctx->channels;
494  src8 = src + 4 * c;
495  while (c--) {
496  *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8 & 0xf0) << 8);
497  *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ & 0x0f) << 12);
498  }
499  src = src8;
500  }
501  break;
502  case 24:
503  while (n--) {
504  c = avctx->channels;
505  src8 = src + 4 * c;
506  while (c--) {
507  *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
508  *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);
509  }
510  src = src8;
511  }
512  break;
513  }
514  break;
515  }
516  case AV_CODEC_ID_PCM_LXF:
517  {
518  int i;
519  n /= avctx->channels;
520  for (c = 0; c < avctx->channels; c++) {
521  dst_int32_t = (int32_t *)frame->extended_data[c];
522  for (i = 0; i < n; i++) {
523  // extract low 20 bits and expand to 32 bits
524  *dst_int32_t++ = (src[2] << 28) |
525  (src[1] << 20) |
526  (src[0] << 12) |
527  ((src[2] & 0x0F) << 8) |
528  src[1];
529  // extract high 20 bits and expand to 32 bits
530  *dst_int32_t++ = (src[4] << 24) |
531  (src[3] << 16) |
532  ((src[2] & 0xF0) << 8) |
533  (src[4] << 4) |
534  (src[3] >> 4);
535  src += 5;
536  }
537  }
538  break;
539  }
540  default:
541  return -1;
542  }
543 
544  *got_frame_ptr = 1;
545 
546  return buf_size;
547 }
548 
549 #define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)
550 #define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_) \
551 AVCodec ff_ ## name_ ## _encoder = { \
552  .name = #name_, \
553  .type = AVMEDIA_TYPE_AUDIO, \
554  .id = AV_CODEC_ID_ ## id_, \
555  .init = pcm_encode_init, \
556  .encode2 = pcm_encode_frame, \
557  .close = pcm_encode_close, \
558  .capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE, \
559  .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
560  AV_SAMPLE_FMT_NONE }, \
561  .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
562 }
563 
564 #define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) \
565  PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)
566 #define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name) \
567  PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)
568 #define PCM_ENCODER(id, sample_fmt, name, long_name) \
569  PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)
570 
571 #define PCM_DECODER_0(id, sample_fmt, name, long_name)
572 #define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_) \
573 AVCodec ff_ ## name_ ## _decoder = { \
574  .name = #name_, \
575  .type = AVMEDIA_TYPE_AUDIO, \
576  .id = AV_CODEC_ID_ ## id_, \
577  .priv_data_size = sizeof(PCMDecode), \
578  .init = pcm_decode_init, \
579  .decode = pcm_decode_frame, \
580  .capabilities = CODEC_CAP_DR1, \
581  .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
582  AV_SAMPLE_FMT_NONE }, \
583  .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
584 }
585 
586 #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name) \
587  PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)
588 #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name) \
589  PCM_DECODER_2(cf, id, sample_fmt, name, long_name)
590 #define PCM_DECODER(id, sample_fmt, name, long_name) \
591  PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)
592 
593 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
594  PCM_ENCODER(id, sample_fmt_, name, long_name_); \
595  PCM_DECODER(id, sample_fmt_, name, long_name_)
596 
597 /* Note: Do not forget to add new entries to the Makefile as well. */
598 PCM_CODEC (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law / G.711 A-law");
599 PCM_DECODER(PCM_DVD, AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");
600 PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
601 PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
602 PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
603 PCM_CODEC (PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
604 PCM_DECODER(PCM_LXF, AV_SAMPLE_FMT_S32P,pcm_lxf, "PCM signed 20-bit little-endian planar");
605 PCM_CODEC (PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law / G.711 mu-law");
606 PCM_CODEC (PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
607 PCM_CODEC (PCM_S8_PLANAR, AV_SAMPLE_FMT_U8P, pcm_s8_planar, "PCM signed 8-bit planar");
608 PCM_CODEC (PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
609 PCM_CODEC (PCM_S16BE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16be_planar, "PCM signed 16-bit big-endian planar");
610 PCM_CODEC (PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
611 PCM_CODEC (PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16le_planar, "PCM signed 16-bit little-endian planar");
612 PCM_CODEC (PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
613 PCM_CODEC (PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
614 PCM_CODEC (PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
615 PCM_CODEC (PCM_S24LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s24le_planar, "PCM signed 24-bit little-endian planar");
616 PCM_CODEC (PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
617 PCM_CODEC (PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
618 PCM_CODEC (PCM_S32LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s32le_planar, "PCM signed 32-bit little-endian planar");
619 PCM_CODEC (PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
620 PCM_CODEC (PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
621 PCM_CODEC (PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
622 PCM_CODEC (PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
623 PCM_CODEC (PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
624 PCM_CODEC (PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
625 PCM_CODEC (PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
626 PCM_DECODER(PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");
627 
Generated on Sat May 25 2013 04:01:08 for FFmpeg by   doxygen 1.8.2