FFmpeg  4.2.3
pcm.c
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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 "libavutil/float_dsp.h"
29 #include "avcodec.h"
30 #include "bytestream.h"
31 #include "internal.h"
32 #include "mathops.h"
33 #include "pcm_tablegen.h"
34 
36 {
37  avctx->frame_size = 0;
38  switch (avctx->codec->id) {
41  break;
44  break;
47  break;
48  default:
49  break;
50  }
51 
53  avctx->block_align = avctx->channels * avctx->bits_per_coded_sample / 8;
54  avctx->bit_rate = avctx->block_align * 8LL * avctx->sample_rate;
55 
56  return 0;
57 }
58 
59 /**
60  * Write PCM samples macro
61  * @param type Datatype of native machine format
62  * @param endian bytestream_put_xxx() suffix
63  * @param src Source pointer (variable name)
64  * @param dst Destination pointer (variable name)
65  * @param n Total number of samples (variable name)
66  * @param shift Bitshift (bits)
67  * @param offset Sample value offset
68  */
69 #define ENCODE(type, endian, src, dst, n, shift, offset) \
70  samples_ ## type = (const type *) src; \
71  for (; n > 0; n--) { \
72  register type v = (*samples_ ## type++ >> shift) + offset; \
73  bytestream_put_ ## endian(&dst, v); \
74  }
75 
76 #define ENCODE_PLANAR(type, endian, dst, n, shift, offset) \
77  n /= avctx->channels; \
78  for (c = 0; c < avctx->channels; c++) { \
79  int i; \
80  samples_ ## type = (const type *) frame->extended_data[c]; \
81  for (i = n; i > 0; i--) { \
82  register type v = (*samples_ ## type++ >> shift) + offset; \
83  bytestream_put_ ## endian(&dst, v); \
84  } \
85  }
86 
87 static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
88  const AVFrame *frame, int *got_packet_ptr)
89 {
90  int n, c, sample_size, v, ret;
91  const short *samples;
92  unsigned char *dst;
93  const uint8_t *samples_uint8_t;
94  const int16_t *samples_int16_t;
95  const int32_t *samples_int32_t;
96  const int64_t *samples_int64_t;
97  const uint16_t *samples_uint16_t;
98  const uint32_t *samples_uint32_t;
99 
100  sample_size = av_get_bits_per_sample(avctx->codec->id) / 8;
101  n = frame->nb_samples * avctx->channels;
102  samples = (const short *)frame->data[0];
103 
104  if ((ret = ff_alloc_packet2(avctx, avpkt, n * sample_size, n * sample_size)) < 0)
105  return ret;
106  dst = avpkt->data;
107 
108  switch (avctx->codec->id) {
110  ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
111  break;
113  ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
114  break;
116  ENCODE(int32_t, le24, samples, dst, n, 8, 0)
117  break;
119  ENCODE_PLANAR(int32_t, le24, dst, n, 8, 0)
120  break;
122  ENCODE(int32_t, be24, samples, dst, n, 8, 0)
123  break;
125  ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
126  break;
128  ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
129  break;
131  for (; n > 0; n--) {
132  uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
133  (ff_reverse[*samples & 0xff] << 8);
134  tmp <<= 4; // sync flags would go here
135  bytestream_put_be24(&dst, tmp);
136  samples++;
137  }
138  break;
140  ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
141  break;
143  ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
144  break;
145  case AV_CODEC_ID_PCM_S8:
146  ENCODE(uint8_t, byte, samples, dst, n, 0, -128)
147  break;
149  ENCODE_PLANAR(uint8_t, byte, dst, n, 0, -128)
150  break;
151 #if HAVE_BIGENDIAN
154  ENCODE(int64_t, le64, samples, dst, n, 0, 0)
155  break;
158  ENCODE(int32_t, le32, samples, dst, n, 0, 0)
159  break;
161  ENCODE_PLANAR(int32_t, le32, dst, n, 0, 0)
162  break;
164  ENCODE(int16_t, le16, samples, dst, n, 0, 0)
165  break;
167  ENCODE_PLANAR(int16_t, le16, dst, n, 0, 0)
168  break;
174 #else
177  ENCODE(int64_t, be64, samples, dst, n, 0, 0)
178  break;
181  ENCODE(int32_t, be32, samples, dst, n, 0, 0)
182  break;
184  ENCODE(int16_t, be16, samples, dst, n, 0, 0)
185  break;
187  ENCODE_PLANAR(int16_t, be16, dst, n, 0, 0)
188  break;
194 #endif /* HAVE_BIGENDIAN */
195  case AV_CODEC_ID_PCM_U8:
196  memcpy(dst, samples, n * sample_size);
197  break;
198 #if HAVE_BIGENDIAN
200 #else
203 #endif /* HAVE_BIGENDIAN */
204  n /= avctx->channels;
205  for (c = 0; c < avctx->channels; c++) {
206  const uint8_t *src = frame->extended_data[c];
207  bytestream_put_buffer(&dst, src, n * sample_size);
208  }
209  break;
211  for (; n > 0; n--) {
212  v = *samples++;
213  *dst++ = linear_to_alaw[(v + 32768) >> 2];
214  }
215  break;
217  for (; n > 0; n--) {
218  v = *samples++;
219  *dst++ = linear_to_ulaw[(v + 32768) >> 2];
220  }
221  break;
223  for (; n > 0; n--) {
224  v = *samples++;
225  *dst++ = linear_to_vidc[(v + 32768) >> 2];
226  }
227  break;
228  default:
229  return -1;
230  }
231 
232  *got_packet_ptr = 1;
233  return 0;
234 }
235 
236 typedef struct PCMDecode {
237  short table[256];
239  float scale;
240 } PCMDecode;
241 
243 {
244  PCMDecode *s = avctx->priv_data;
245  int i;
246 
247  if (avctx->channels <= 0) {
248  av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
249  return AVERROR(EINVAL);
250  }
251 
252  switch (avctx->codec_id) {
254  for (i = 0; i < 256; i++)
255  s->table[i] = alaw2linear(i);
256  break;
258  for (i = 0; i < 256; i++)
259  s->table[i] = ulaw2linear(i);
260  break;
262  for (i = 0; i < 256; i++)
263  s->table[i] = vidc2linear(i);
264  break;
267  if (avctx->bits_per_coded_sample < 1 || avctx->bits_per_coded_sample > 24)
268  return AVERROR_INVALIDDATA;
269 
270  s->scale = 1. / (1 << (avctx->bits_per_coded_sample - 1));
272  if (!s->fdsp)
273  return AVERROR(ENOMEM);
274  break;
275  default:
276  break;
277  }
278 
279  avctx->sample_fmt = avctx->codec->sample_fmts[0];
280 
281  if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
283 
284  return 0;
285 }
286 
288 {
289  PCMDecode *s = avctx->priv_data;
290 
291  av_freep(&s->fdsp);
292 
293  return 0;
294 }
295 
296 /**
297  * Read PCM samples macro
298  * @param size Data size of native machine format
299  * @param endian bytestream_get_xxx() endian suffix
300  * @param src Source pointer (variable name)
301  * @param dst Destination pointer (variable name)
302  * @param n Total number of samples (variable name)
303  * @param shift Bitshift (bits)
304  * @param offset Sample value offset
305  */
306 #define DECODE(size, endian, src, dst, n, shift, offset) \
307  for (; n > 0; n--) { \
308  uint ## size ## _t v = bytestream_get_ ## endian(&src); \
309  AV_WN ## size ## A(dst, (uint ## size ## _t)(v - offset) << shift); \
310  dst += size / 8; \
311  }
312 
313 #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) \
314  n /= avctx->channels; \
315  for (c = 0; c < avctx->channels; c++) { \
316  int i; \
317  dst = frame->extended_data[c]; \
318  for (i = n; i > 0; i--) { \
319  uint ## size ## _t v = bytestream_get_ ## endian(&src); \
320  AV_WN ## size ## A(dst, (uint ## size ##_t)(v - offset) << shift); \
321  dst += size / 8; \
322  } \
323  }
324 
325 static int pcm_decode_frame(AVCodecContext *avctx, void *data,
326  int *got_frame_ptr, AVPacket *avpkt)
327 {
328  const uint8_t *src = avpkt->data;
329  int buf_size = avpkt->size;
330  PCMDecode *s = avctx->priv_data;
331  AVFrame *frame = data;
332  int sample_size, c, n, ret, samples_per_block;
333  uint8_t *samples;
334  int32_t *dst_int32_t;
335 
336  sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
337 
338  /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */
339  samples_per_block = 1;
340  if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
341  /* we process 40-bit blocks per channel for LXF */
342  samples_per_block = 2;
343  sample_size = 5;
344  }
345 
346  if (sample_size == 0) {
347  av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
348  return AVERROR(EINVAL);
349  }
350 
351  if (avctx->channels == 0) {
352  av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
353  return AVERROR(EINVAL);
354  }
355 
356  if (avctx->codec_id != avctx->codec->id) {
357  av_log(avctx, AV_LOG_ERROR, "codec ids mismatch\n");
358  return AVERROR(EINVAL);
359  }
360 
361  n = avctx->channels * sample_size;
362 
363  if (n && buf_size % n) {
364  if (buf_size < n) {
365  av_log(avctx, AV_LOG_ERROR,
366  "Invalid PCM packet, data has size %d but at least a size of %d was expected\n",
367  buf_size, n);
368  return AVERROR_INVALIDDATA;
369  } else
370  buf_size -= buf_size % n;
371  }
372 
373  n = buf_size / sample_size;
374 
375  /* get output buffer */
376  frame->nb_samples = n * samples_per_block / avctx->channels;
377  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
378  return ret;
379  samples = frame->data[0];
380 
381  switch (avctx->codec_id) {
383  DECODE(32, le32, src, samples, n, 0, 0x80000000)
384  break;
386  DECODE(32, be32, src, samples, n, 0, 0x80000000)
387  break;
389  DECODE(32, le24, src, samples, n, 8, 0)
390  break;
392  DECODE_PLANAR(32, le24, src, samples, n, 8, 0);
393  break;
395  DECODE(32, be24, src, samples, n, 8, 0)
396  break;
398  DECODE(32, le24, src, samples, n, 8, 0x800000)
399  break;
401  DECODE(32, be24, src, samples, n, 8, 0x800000)
402  break;
404  for (; n > 0; n--) {
405  uint32_t v = bytestream_get_be24(&src);
406  v >>= 4; // sync flags are here
407  AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +
408  (ff_reverse[v & 0xff] << 8));
409  samples += 2;
410  }
411  break;
413  DECODE(16, le16, src, samples, n, 0, 0x8000)
414  break;
416  DECODE(16, be16, src, samples, n, 0, 0x8000)
417  break;
418  case AV_CODEC_ID_PCM_S8:
419  for (; n > 0; n--)
420  *samples++ = *src++ + 128;
421  break;
423  n /= avctx->channels;
424  for (c = 0; c < avctx->channels; c++) {
425  int i;
426  samples = frame->extended_data[c];
427  for (i = n; i > 0; i--)
428  *samples++ = *src++ + 128;
429  }
430  break;
431 #if HAVE_BIGENDIAN
434  DECODE(64, le64, src, samples, n, 0, 0)
435  break;
440  DECODE(32, le32, src, samples, n, 0, 0)
441  break;
443  DECODE_PLANAR(32, le32, src, samples, n, 0, 0);
444  break;
446  DECODE(16, le16, src, samples, n, 0, 0)
447  break;
449  DECODE_PLANAR(16, le16, src, samples, n, 0, 0);
450  break;
456 #else
459  DECODE(64, be64, src, samples, n, 0, 0)
460  break;
463  DECODE(32, be32, src, samples, n, 0, 0)
464  break;
466  DECODE(16, be16, src, samples, n, 0, 0)
467  break;
469  DECODE_PLANAR(16, be16, src, samples, n, 0, 0);
470  break;
478 #endif /* HAVE_BIGENDIAN */
479  case AV_CODEC_ID_PCM_U8:
480  memcpy(samples, src, n * sample_size);
481  break;
482 #if HAVE_BIGENDIAN
484 #else
487 #endif /* HAVE_BIGENDIAN */
488  n /= avctx->channels;
489  for (c = 0; c < avctx->channels; c++) {
490  samples = frame->extended_data[c];
491  bytestream_get_buffer(&src, samples, n * sample_size);
492  }
493  break;
495  for (; n > 0; n--) {
496  int v = *src++;
497  if (v < 128)
498  v = 128 - v;
499  *samples++ = v;
500  }
501  break;
505  for (; n > 0; n--) {
506  AV_WN16A(samples, s->table[*src++]);
507  samples += 2;
508  }
509  break;
510  case AV_CODEC_ID_PCM_LXF:
511  {
512  int i;
513  n /= avctx->channels;
514  for (c = 0; c < avctx->channels; c++) {
515  dst_int32_t = (int32_t *)frame->extended_data[c];
516  for (i = 0; i < n; i++) {
517  // extract low 20 bits and expand to 32 bits
518  *dst_int32_t++ = ((uint32_t)src[2]<<28) |
519  (src[1] << 20) |
520  (src[0] << 12) |
521  ((src[2] & 0x0F) << 8) |
522  src[1];
523  // extract high 20 bits and expand to 32 bits
524  *dst_int32_t++ = ((uint32_t)src[4]<<24) |
525  (src[3] << 16) |
526  ((src[2] & 0xF0) << 8) |
527  (src[4] << 4) |
528  (src[3] >> 4);
529  src += 5;
530  }
531  }
532  break;
533  }
534  default:
535  return -1;
536  }
537 
538  if (avctx->codec_id == AV_CODEC_ID_PCM_F16LE ||
539  avctx->codec_id == AV_CODEC_ID_PCM_F24LE) {
540  s->fdsp->vector_fmul_scalar((float *)frame->extended_data[0],
541  (const float *)frame->extended_data[0],
542  s->scale, FFALIGN(frame->nb_samples * avctx->channels, 4));
543  emms_c();
544  }
545 
546  *got_frame_ptr = 1;
547 
548  return buf_size;
549 }
550 
551 #define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)
552 #define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_) \
553 AVCodec ff_ ## name_ ## _encoder = { \
554  .name = #name_, \
555  .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
556  .type = AVMEDIA_TYPE_AUDIO, \
557  .id = AV_CODEC_ID_ ## id_, \
558  .init = pcm_encode_init, \
559  .encode2 = pcm_encode_frame, \
560  .capabilities = AV_CODEC_CAP_VARIABLE_FRAME_SIZE, \
561  .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
562  AV_SAMPLE_FMT_NONE }, \
563 }
564 
565 #define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) \
566  PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)
567 #define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name) \
568  PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)
569 #define PCM_ENCODER(id, sample_fmt, name, long_name) \
570  PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)
571 
572 #define PCM_DECODER_0(id, sample_fmt, name, long_name)
573 #define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_) \
574 AVCodec ff_ ## name_ ## _decoder = { \
575  .name = #name_, \
576  .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
577  .type = AVMEDIA_TYPE_AUDIO, \
578  .id = AV_CODEC_ID_ ## id_, \
579  .priv_data_size = sizeof(PCMDecode), \
580  .init = pcm_decode_init, \
581  .close = pcm_decode_close, \
582  .decode = pcm_decode_frame, \
583  .capabilities = AV_CODEC_CAP_DR1, \
584  .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
585  AV_SAMPLE_FMT_NONE }, \
586 }
587 
588 #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name) \
589  PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)
590 #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name) \
591  PCM_DECODER_2(cf, id, sample_fmt, name, long_name)
592 #define PCM_DECODER(id, sample_fmt, name, long_name) \
593  PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)
594 
595 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
596  PCM_ENCODER(id, sample_fmt_, name, long_name_); \
597  PCM_DECODER(id, sample_fmt_, name, long_name_)
598 
599 /* Note: Do not forget to add new entries to the Makefile as well. */
600 PCM_CODEC (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law / G.711 A-law");
601 PCM_DECODER(PCM_F16LE, AV_SAMPLE_FMT_FLT, pcm_f16le, "PCM 16.8 floating point little-endian");
602 PCM_DECODER(PCM_F24LE, AV_SAMPLE_FMT_FLT, pcm_f24le, "PCM 24.0 floating point little-endian");
603 PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
604 PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
605 PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
606 PCM_CODEC (PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
607 PCM_DECODER(PCM_LXF, AV_SAMPLE_FMT_S32P,pcm_lxf, "PCM signed 20-bit little-endian planar");
608 PCM_CODEC (PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law / G.711 mu-law");
609 PCM_CODEC (PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
610 PCM_CODEC (PCM_S8_PLANAR, AV_SAMPLE_FMT_U8P, pcm_s8_planar, "PCM signed 8-bit planar");
611 PCM_CODEC (PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
612 PCM_CODEC (PCM_S16BE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16be_planar, "PCM signed 16-bit big-endian planar");
613 PCM_CODEC (PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
614 PCM_CODEC (PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16le_planar, "PCM signed 16-bit little-endian planar");
615 PCM_CODEC (PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
616 PCM_CODEC (PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
617 PCM_CODEC (PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
618 PCM_CODEC (PCM_S24LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s24le_planar, "PCM signed 24-bit little-endian planar");
619 PCM_CODEC (PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
620 PCM_CODEC (PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
621 PCM_CODEC (PCM_S32LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s32le_planar, "PCM signed 32-bit little-endian planar");
622 PCM_CODEC (PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
623 PCM_CODEC (PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
624 PCM_CODEC (PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
625 PCM_CODEC (PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
626 PCM_CODEC (PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
627 PCM_CODEC (PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
628 PCM_CODEC (PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
629 PCM_DECODER(PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");
630 PCM_CODEC (PCM_S64BE, AV_SAMPLE_FMT_S64, pcm_s64be, "PCM signed 64-bit big-endian");
631 PCM_CODEC (PCM_S64LE, AV_SAMPLE_FMT_S64, pcm_s64le, "PCM signed 64-bit little-endian");
632 PCM_CODEC (PCM_VIDC, AV_SAMPLE_FMT_S16, pcm_vidc, "PCM Archimedes VIDC");
const struct AVCodec * codec
Definition: avcodec.h:1574
static av_cold int vidc2linear(unsigned char u_val)
Definition: pcm_tablegen.h:78
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
static void pcm_alaw_tableinit(void)
Definition: pcm_tablegen.h:127
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1615
static void pcm_ulaw_tableinit(void)
Definition: pcm_tablegen.h:132
const uint8_t ff_reverse[256]
Definition: reverse.c:23
#define DECODE_PLANAR(size, endian, src, dst, n, shift, offset)
Definition: pcm.c:313
static av_cold int ulaw2linear(unsigned char u_val)
Definition: pcm_tablegen.h:61
static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: pcm.c:87
int size
Definition: avcodec.h:1478
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2796
#define src
Definition: vp8dsp.c:254
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs...
Definition: avcodec.h:2262
Macro definitions for various function/variable attributes.
Definition: pcm.c:236
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: encode.c:32
short table[256]
Definition: pcm.c:237
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2233
uint8_t
#define av_cold
Definition: attributes.h:82
AV_SAMPLE_FMT_U8
#define emms_c()
Definition: internal.h:55
static AVFrame * frame
const char data[16]
Definition: mxf.c:91
static av_cold int pcm_decode_close(AVCodecContext *avctx)
Definition: pcm.c:287
uint8_t * data
Definition: avcodec.h:1477
static uint8_t linear_to_ulaw[16384]
Definition: pcm_tablegen.h:100
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2789
signed 32 bits
Definition: samplefmt.h:62
#define FFALIGN(x, a)
Definition: macros.h:48
#define av_log(a,...)
static int pcm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: pcm.c:325
enum AVCodecID id
Definition: avcodec.h:3495
#define PCM_CODEC(id, sample_fmt_, name, long_name_)
Definition: pcm.c:595
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:259
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1533
av_cold AVFloatDSPContext * avpriv_float_dsp_alloc(int bit_exact)
Allocate a float DSP context.
Definition: float_dsp.c:135
#define AVERROR(e)
Definition: error.h:43
#define DECODE(size, endian, src, dst, n, shift, offset)
Read PCM samples macro.
Definition: pcm.c:306
#define ENCODE_PLANAR(type, endian, dst, n, shift, offset)
Definition: pcm.c:76
static void pcm_vidc_tableinit(void)
Definition: pcm_tablegen.h:137
#define ENCODE(type, endian, src, dst, n, shift, offset)
Write PCM samples macro.
Definition: pcm.c:69
static av_cold int pcm_encode_init(AVCodecContext *avctx)
Definition: pcm.c:35
static av_cold int alaw2linear(unsigned char a_val)
Definition: pcm_tablegen.h:46
signed 32 bits, planar
Definition: samplefmt.h:68
signed 64 bits
Definition: samplefmt.h:71
int32_t
float scale
Definition: pcm.c:239
#define s(width, name)
Definition: cbs_vp9.c:257
int n
Definition: avisynth_c.h:760
unsigned 8 bits, planar
Definition: samplefmt.h:66
#define AV_WN16A(p, v)
Definition: intreadwrite.h:534
static av_always_inline unsigned int bytestream_get_buffer(const uint8_t **b, uint8_t *dst, unsigned int size)
Definition: bytestream.h:359
if(ret< 0)
Definition: vf_mcdeint.c:279
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2245
Libavcodec external API header.
enum AVCodecID codec_id
Definition: avcodec.h:1575
int sample_rate
samples per second
Definition: avcodec.h:2225
main external API structure.
Definition: avcodec.h:1565
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1964
void(* vector_fmul_scalar)(float *dst, const float *src, float mul, int len)
Multiply a vector of floats by a scalar float.
Definition: float_dsp.h:85
static av_cold int pcm_decode_init(AVCodecContext *avctx)
Definition: pcm.c:242
#define PCM_DECODER(id, sample_fmt, name, long_name)
Definition: pcm.c:592
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:309
common internal api header.
signed 16 bits
Definition: samplefmt.h:61
static double c[64]
static uint8_t linear_to_vidc[16384]
Definition: pcm_tablegen.h:101
static uint8_t linear_to_alaw[16384]
Definition: pcm_tablegen.h:99
static av_always_inline void bytestream_put_buffer(uint8_t **b, const uint8_t *src, unsigned int size)
Definition: bytestream.h:368
void * priv_data
Definition: avcodec.h:1592
int channels
number of audio channels
Definition: avcodec.h:2226
#define av_freep(p)
signed 16 bits, planar
Definition: samplefmt.h:67
AVFloatDSPContext * fdsp
Definition: pcm.c:238
enum AVSampleFormat * sample_fmts
array of supported sample formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3504
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:342
This structure stores compressed data.
Definition: avcodec.h:1454
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:361
for(j=16;j >0;--j)
static uint8_t tmp[11]
Definition: aes_ctr.c:26