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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 "avcodec.h"
29 #include "bytestream.h"
30 #include "internal.h"
31 #include "mathops.h"
32 #include "pcm_tablegen.h"
33 
35 {
36  avctx->frame_size = 0;
37  switch (avctx->codec->id) {
40  break;
43  break;
44  default:
45  break;
46  }
47 
49  avctx->block_align = avctx->channels * avctx->bits_per_coded_sample / 8;
50  avctx->bit_rate = avctx->block_align * 8LL * avctx->sample_rate;
51 
52  return 0;
53 }
54 
55 /**
56  * Write PCM samples macro
57  * @param type Datatype of native machine format
58  * @param endian bytestream_put_xxx() suffix
59  * @param src Source pointer (variable name)
60  * @param dst Destination pointer (variable name)
61  * @param n Total number of samples (variable name)
62  * @param shift Bitshift (bits)
63  * @param offset Sample value offset
64  */
65 #define ENCODE(type, endian, src, dst, n, shift, offset) \
66  samples_ ## type = (const type *) src; \
67  for (; n > 0; n--) { \
68  register type v = (*samples_ ## type++ >> shift) + offset; \
69  bytestream_put_ ## endian(&dst, v); \
70  }
71 
72 #define ENCODE_PLANAR(type, endian, dst, n, shift, offset) \
73  n /= avctx->channels; \
74  for (c = 0; c < avctx->channels; c++) { \
75  int i; \
76  samples_ ## type = (const type *) frame->extended_data[c]; \
77  for (i = n; i > 0; i--) { \
78  register type v = (*samples_ ## type++ >> shift) + offset; \
79  bytestream_put_ ## endian(&dst, v); \
80  } \
81  }
82 
83 static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,
84  const AVFrame *frame, int *got_packet_ptr)
85 {
86  int n, c, sample_size, v, ret;
87  const short *samples;
88  unsigned char *dst;
89  const uint8_t *samples_uint8_t;
90  const int16_t *samples_int16_t;
91  const int32_t *samples_int32_t;
92  const int64_t *samples_int64_t;
93  const uint16_t *samples_uint16_t;
94  const uint32_t *samples_uint32_t;
95 
96  sample_size = av_get_bits_per_sample(avctx->codec->id) / 8;
97  n = frame->nb_samples * avctx->channels;
98  samples = (const short *)frame->data[0];
99 
100  if ((ret = ff_alloc_packet2(avctx, avpkt, n * sample_size, n * sample_size)) < 0)
101  return ret;
102  dst = avpkt->data;
103 
104  switch (avctx->codec->id) {
106  ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)
107  break;
109  ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)
110  break;
112  ENCODE(int32_t, le24, samples, dst, n, 8, 0)
113  break;
115  ENCODE_PLANAR(int32_t, le24, dst, n, 8, 0)
116  break;
118  ENCODE(int32_t, be24, samples, dst, n, 8, 0)
119  break;
121  ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)
122  break;
124  ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)
125  break;
127  for (; n > 0; n--) {
128  uint32_t tmp = ff_reverse[(*samples >> 8) & 0xff] +
129  (ff_reverse[*samples & 0xff] << 8);
130  tmp <<= 4; // sync flags would go here
131  bytestream_put_be24(&dst, tmp);
132  samples++;
133  }
134  break;
136  ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)
137  break;
139  ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)
140  break;
141  case AV_CODEC_ID_PCM_S8:
142  ENCODE(uint8_t, byte, samples, dst, n, 0, -128)
143  break;
145  ENCODE_PLANAR(uint8_t, byte, dst, n, 0, -128)
146  break;
147 #if HAVE_BIGENDIAN
150  ENCODE(int64_t, le64, samples, dst, n, 0, 0)
151  break;
154  ENCODE(int32_t, le32, samples, dst, n, 0, 0)
155  break;
157  ENCODE_PLANAR(int32_t, le32, dst, n, 0, 0)
158  break;
160  ENCODE(int16_t, le16, samples, dst, n, 0, 0)
161  break;
163  ENCODE_PLANAR(int16_t, le16, dst, n, 0, 0)
164  break;
170 #else
173  ENCODE(int64_t, be64, samples, dst, n, 0, 0)
174  break;
177  ENCODE(int32_t, be32, samples, dst, n, 0, 0)
178  break;
180  ENCODE(int16_t, be16, samples, dst, n, 0, 0)
181  break;
183  ENCODE_PLANAR(int16_t, be16, dst, n, 0, 0)
184  break;
190 #endif /* HAVE_BIGENDIAN */
191  case AV_CODEC_ID_PCM_U8:
192  memcpy(dst, samples, n * sample_size);
193  break;
194 #if HAVE_BIGENDIAN
196 #else
199 #endif /* HAVE_BIGENDIAN */
200  n /= avctx->channels;
201  for (c = 0; c < avctx->channels; c++) {
202  const uint8_t *src = frame->extended_data[c];
203  bytestream_put_buffer(&dst, src, n * sample_size);
204  }
205  break;
207  for (; n > 0; n--) {
208  v = *samples++;
209  *dst++ = linear_to_alaw[(v + 32768) >> 2];
210  }
211  break;
213  for (; n > 0; n--) {
214  v = *samples++;
215  *dst++ = linear_to_ulaw[(v + 32768) >> 2];
216  }
217  break;
218  default:
219  return -1;
220  }
221 
222  *got_packet_ptr = 1;
223  return 0;
224 }
225 
226 typedef struct PCMDecode {
227  short table[256];
228 } PCMDecode;
229 
231 {
232  PCMDecode *s = avctx->priv_data;
233  int i;
234 
235  if (avctx->channels <= 0) {
236  av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");
237  return AVERROR(EINVAL);
238  }
239 
240  switch (avctx->codec_id) {
242  for (i = 0; i < 256; i++)
243  s->table[i] = alaw2linear(i);
244  break;
246  for (i = 0; i < 256; i++)
247  s->table[i] = ulaw2linear(i);
248  break;
249  default:
250  break;
251  }
252 
253  avctx->sample_fmt = avctx->codec->sample_fmts[0];
254 
255  if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)
257 
258  return 0;
259 }
260 
261 /**
262  * Read PCM samples macro
263  * @param size Data size of native machine format
264  * @param endian bytestream_get_xxx() endian suffix
265  * @param src Source pointer (variable name)
266  * @param dst Destination pointer (variable name)
267  * @param n Total number of samples (variable name)
268  * @param shift Bitshift (bits)
269  * @param offset Sample value offset
270  */
271 #define DECODE(size, endian, src, dst, n, shift, offset) \
272  for (; n > 0; n--) { \
273  uint ## size ## _t v = bytestream_get_ ## endian(&src); \
274  AV_WN ## size ## A(dst, (v - offset) << shift); \
275  dst += size / 8; \
276  }
277 
278 #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset) \
279  n /= avctx->channels; \
280  for (c = 0; c < avctx->channels; c++) { \
281  int i; \
282  dst = frame->extended_data[c]; \
283  for (i = n; i > 0; i--) { \
284  uint ## size ## _t v = bytestream_get_ ## endian(&src); \
285  AV_WN ## size ## A(dst, (v - offset) << shift); \
286  dst += size / 8; \
287  } \
288  }
289 
290 static int pcm_decode_frame(AVCodecContext *avctx, void *data,
291  int *got_frame_ptr, AVPacket *avpkt)
292 {
293  const uint8_t *src = avpkt->data;
294  int buf_size = avpkt->size;
295  PCMDecode *s = avctx->priv_data;
296  AVFrame *frame = data;
297  int sample_size, c, n, ret, samples_per_block;
298  uint8_t *samples;
299  int32_t *dst_int32_t;
300 
301  sample_size = av_get_bits_per_sample(avctx->codec_id) / 8;
302 
303  /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */
304  samples_per_block = 1;
305  if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {
306  /* we process 40-bit blocks per channel for LXF */
307  samples_per_block = 2;
308  sample_size = 5;
309  }
310 
311  if (sample_size == 0) {
312  av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");
313  return AVERROR(EINVAL);
314  }
315 
316  if (avctx->channels == 0) {
317  av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");
318  return AVERROR(EINVAL);
319  }
320 
321  if (avctx->codec_id != avctx->codec->id) {
322  av_log(avctx, AV_LOG_ERROR, "codec ids mismatch\n");
323  return AVERROR(EINVAL);
324  }
325 
326  n = avctx->channels * sample_size;
327 
328  if (n && buf_size % n) {
329  if (buf_size < n) {
330  av_log(avctx, AV_LOG_ERROR,
331  "Invalid PCM packet, data has size %d but at least a size of %d was expected\n",
332  buf_size, n);
333  return AVERROR_INVALIDDATA;
334  } else
335  buf_size -= buf_size % n;
336  }
337 
338  n = buf_size / sample_size;
339 
340  /* get output buffer */
341  frame->nb_samples = n * samples_per_block / avctx->channels;
342  if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
343  return ret;
344  samples = frame->data[0];
345 
346  switch (avctx->codec_id) {
348  DECODE(32, le32, src, samples, n, 0, 0x80000000)
349  break;
351  DECODE(32, be32, src, samples, n, 0, 0x80000000)
352  break;
354  DECODE(32, le24, src, samples, n, 8, 0)
355  break;
357  DECODE_PLANAR(32, le24, src, samples, n, 8, 0);
358  break;
360  DECODE(32, be24, src, samples, n, 8, 0)
361  break;
363  DECODE(32, le24, src, samples, n, 8, 0x800000)
364  break;
366  DECODE(32, be24, src, samples, n, 8, 0x800000)
367  break;
369  for (; n > 0; n--) {
370  uint32_t v = bytestream_get_be24(&src);
371  v >>= 4; // sync flags are here
372  AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +
373  (ff_reverse[v & 0xff] << 8));
374  samples += 2;
375  }
376  break;
378  DECODE(16, le16, src, samples, n, 0, 0x8000)
379  break;
381  DECODE(16, be16, src, samples, n, 0, 0x8000)
382  break;
383  case AV_CODEC_ID_PCM_S8:
384  for (; n > 0; n--)
385  *samples++ = *src++ + 128;
386  break;
388  n /= avctx->channels;
389  for (c = 0; c < avctx->channels; c++) {
390  int i;
391  samples = frame->extended_data[c];
392  for (i = n; i > 0; i--)
393  *samples++ = *src++ + 128;
394  }
395  break;
396 #if HAVE_BIGENDIAN
399  DECODE(64, le64, src, samples, n, 0, 0)
400  break;
403  DECODE(32, le32, src, samples, n, 0, 0)
404  break;
406  DECODE_PLANAR(32, le32, src, samples, n, 0, 0);
407  break;
409  DECODE(16, le16, src, samples, n, 0, 0)
410  break;
412  DECODE_PLANAR(16, le16, src, samples, n, 0, 0);
413  break;
419 #else
422  DECODE(64, be64, src, samples, n, 0, 0)
423  break;
426  DECODE(32, be32, src, samples, n, 0, 0)
427  break;
429  DECODE(16, be16, src, samples, n, 0, 0)
430  break;
432  DECODE_PLANAR(16, be16, src, samples, n, 0, 0);
433  break;
439 #endif /* HAVE_BIGENDIAN */
440  case AV_CODEC_ID_PCM_U8:
441  memcpy(samples, src, n * sample_size);
442  break;
443 #if HAVE_BIGENDIAN
445 #else
448 #endif /* HAVE_BIGENDIAN */
449  n /= avctx->channels;
450  for (c = 0; c < avctx->channels; c++) {
451  samples = frame->extended_data[c];
452  bytestream_get_buffer(&src, samples, n * sample_size);
453  }
454  break;
456  for (; n > 0; n--) {
457  int v = *src++;
458  if (v < 128)
459  v = 128 - v;
460  *samples++ = v;
461  }
462  break;
465  for (; n > 0; n--) {
466  AV_WN16A(samples, s->table[*src++]);
467  samples += 2;
468  }
469  break;
470  case AV_CODEC_ID_PCM_LXF:
471  {
472  int i;
473  n /= avctx->channels;
474  for (c = 0; c < avctx->channels; c++) {
475  dst_int32_t = (int32_t *)frame->extended_data[c];
476  for (i = 0; i < n; i++) {
477  // extract low 20 bits and expand to 32 bits
478  *dst_int32_t++ = (src[2] << 28) |
479  (src[1] << 20) |
480  (src[0] << 12) |
481  ((src[2] & 0x0F) << 8) |
482  src[1];
483  // extract high 20 bits and expand to 32 bits
484  *dst_int32_t++ = (src[4] << 24) |
485  (src[3] << 16) |
486  ((src[2] & 0xF0) << 8) |
487  (src[4] << 4) |
488  (src[3] >> 4);
489  src += 5;
490  }
491  }
492  break;
493  }
494  default:
495  return -1;
496  }
497 
498  *got_frame_ptr = 1;
499 
500  return buf_size;
501 }
502 
503 #define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)
504 #define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_) \
505 AVCodec ff_ ## name_ ## _encoder = { \
506  .name = #name_, \
507  .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
508  .type = AVMEDIA_TYPE_AUDIO, \
509  .id = AV_CODEC_ID_ ## id_, \
510  .init = pcm_encode_init, \
511  .encode2 = pcm_encode_frame, \
512  .capabilities = AV_CODEC_CAP_VARIABLE_FRAME_SIZE, \
513  .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
514  AV_SAMPLE_FMT_NONE }, \
515 }
516 
517 #define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name) \
518  PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)
519 #define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name) \
520  PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)
521 #define PCM_ENCODER(id, sample_fmt, name, long_name) \
522  PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)
523 
524 #define PCM_DECODER_0(id, sample_fmt, name, long_name)
525 #define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_) \
526 AVCodec ff_ ## name_ ## _decoder = { \
527  .name = #name_, \
528  .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
529  .type = AVMEDIA_TYPE_AUDIO, \
530  .id = AV_CODEC_ID_ ## id_, \
531  .priv_data_size = sizeof(PCMDecode), \
532  .init = pcm_decode_init, \
533  .decode = pcm_decode_frame, \
534  .capabilities = AV_CODEC_CAP_DR1, \
535  .sample_fmts = (const enum AVSampleFormat[]){ sample_fmt_, \
536  AV_SAMPLE_FMT_NONE }, \
537 }
538 
539 #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name) \
540  PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)
541 #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name) \
542  PCM_DECODER_2(cf, id, sample_fmt, name, long_name)
543 #define PCM_DECODER(id, sample_fmt, name, long_name) \
544  PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)
545 
546 #define PCM_CODEC(id, sample_fmt_, name, long_name_) \
547  PCM_ENCODER(id, sample_fmt_, name, long_name_); \
548  PCM_DECODER(id, sample_fmt_, name, long_name_)
549 
550 /* Note: Do not forget to add new entries to the Makefile as well. */
551 PCM_CODEC (PCM_ALAW, AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law / G.711 A-law");
552 PCM_CODEC (PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");
553 PCM_CODEC (PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");
554 PCM_CODEC (PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");
555 PCM_CODEC (PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");
556 PCM_DECODER(PCM_LXF, AV_SAMPLE_FMT_S32P,pcm_lxf, "PCM signed 20-bit little-endian planar");
557 PCM_CODEC (PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law / G.711 mu-law");
558 PCM_CODEC (PCM_S8, AV_SAMPLE_FMT_U8, pcm_s8, "PCM signed 8-bit");
559 PCM_CODEC (PCM_S8_PLANAR, AV_SAMPLE_FMT_U8P, pcm_s8_planar, "PCM signed 8-bit planar");
560 PCM_CODEC (PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");
561 PCM_CODEC (PCM_S16BE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16be_planar, "PCM signed 16-bit big-endian planar");
562 PCM_CODEC (PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");
563 PCM_CODEC (PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16le_planar, "PCM signed 16-bit little-endian planar");
564 PCM_CODEC (PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");
565 PCM_CODEC (PCM_S24DAUD, AV_SAMPLE_FMT_S16, pcm_s24daud, "PCM D-Cinema audio signed 24-bit");
566 PCM_CODEC (PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");
567 PCM_CODEC (PCM_S24LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s24le_planar, "PCM signed 24-bit little-endian planar");
568 PCM_CODEC (PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");
569 PCM_CODEC (PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");
570 PCM_CODEC (PCM_S32LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s32le_planar, "PCM signed 32-bit little-endian planar");
571 PCM_CODEC (PCM_U8, AV_SAMPLE_FMT_U8, pcm_u8, "PCM unsigned 8-bit");
572 PCM_CODEC (PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");
573 PCM_CODEC (PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");
574 PCM_CODEC (PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");
575 PCM_CODEC (PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");
576 PCM_CODEC (PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");
577 PCM_CODEC (PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");
578 PCM_DECODER(PCM_ZORK, AV_SAMPLE_FMT_U8, pcm_zork, "PCM Zork");
579 PCM_CODEC (PCM_S64BE, AV_SAMPLE_FMT_S64, pcm_s64be, "PCM signed 64-bit big-endian");
580 PCM_CODEC (PCM_S64LE, AV_SAMPLE_FMT_S64, pcm_s64le, "PCM signed 64-bit little-endian");
const struct AVCodec * codec
Definition: avcodec.h:1685
const char * s
Definition: avisynth_c.h:768
#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:184
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
static void pcm_alaw_tableinit(void)
Definition: pcm_tablegen.h:105
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1741
static void pcm_ulaw_tableinit(void)
Definition: pcm_tablegen.h:110
#define DECODE_PLANAR(size, endian, src, dst, n, shift, offset)
Definition: pcm.c:278
static av_cold int ulaw2linear(unsigned char u_val)
Definition: pcm_tablegen.h:55
static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Definition: pcm.c:83
int size
Definition: avcodec.h:1602
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:3078
#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:2475
Macro definitions for various function/variable attributes.
uint64_t_TMPL AV_WL64 unsigned int_TMPL le32
Definition: bytestream.h:87
Definition: pcm.c:226
short table[256]
Definition: pcm.c:227
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2446
uint8_t
#define av_cold
Definition: attributes.h:82
AV_SAMPLE_FMT_U8
static AVFrame * frame
uint8_t * data
Definition: avcodec.h:1601
static uint8_t linear_to_ulaw[16384]
Definition: pcm_tablegen.h:79
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:3071
signed 32 bits
Definition: samplefmt.h:62
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL be24
Definition: bytestream.h:87
#define av_log(a,...)
static int pcm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame_ptr, AVPacket *avpkt)
Definition: pcm.c:290
enum AVCodecID id
Definition: avcodec.h:3615
#define PCM_CODEC(id, sample_fmt_, name, long_name_)
Definition: pcm.c:546
#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:3535
#define AVERROR(e)
Definition: error.h:43
#define DECODE(size, endian, src, dst, n, shift, offset)
Read PCM samples macro.
Definition: pcm.c:271
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL be64
Definition: bytestream.h:87
const uint8_t ff_reverse[256]
Definition: reverse.c:23
#define ENCODE_PLANAR(type, endian, dst, n, shift, offset)
Definition: pcm.c:72
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL be16
Definition: bytestream.h:87
#define ENCODE(type, endian, src, dst, n, shift, offset)
Write PCM samples macro.
Definition: pcm.c:65
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL le24
Definition: bytestream.h:87
static av_cold int pcm_encode_init(AVCodecContext *avctx)
Definition: pcm.c:34
static av_cold int alaw2linear(unsigned char a_val)
Definition: pcm_tablegen.h:40
signed 32 bits, planar
Definition: samplefmt.h:68
uint64_t_TMPL le64
Definition: bytestream.h:87
signed 64 bits
Definition: samplefmt.h:71
int32_t
int n
Definition: avisynth_c.h:684
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
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2458
Libavcodec external API header.
enum AVCodecID codec_id
Definition: avcodec.h:1693
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_WB16 unsigned int_TMPL byte
Definition: bytestream.h:87
int sample_rate
samples per second
Definition: avcodec.h:2438
main external API structure.
Definition: avcodec.h:1676
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: utils.c:947
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL be32
Definition: bytestream.h:87
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL le16
Definition: bytestream.h:87
static av_cold int pcm_decode_init(AVCodecContext *avctx)
Definition: pcm.c:230
int ff_alloc_packet2(AVCodecContext *avctx, AVPacket *avpkt, int64_t size, int64_t min_size)
Check AVPacket size and/or allocate data.
Definition: utils.c:1722
#define PCM_DECODER(id, sample_fmt, name, long_name)
Definition: pcm.c:543
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:198
common internal api header.
if(ret< 0)
Definition: vf_mcdeint.c:282
signed 16 bits
Definition: samplefmt.h:61
static uint8_t linear_to_alaw[16384]
Definition: pcm_tablegen.h:78
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:1718
int channels
number of audio channels
Definition: avcodec.h:2439
static uint8_t tmp[8]
Definition: des.c:38
static AVCodec * c
signed 16 bits, planar
Definition: samplefmt.h:67
enum AVSampleFormat * sample_fmts
array of supported sample formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3624
uint8_t ** extended_data
pointers to the data planes/channels.
Definition: frame.h:231
This structure stores compressed data.
Definition: avcodec.h:1578
int nb_samples
number of audio samples (per channel) described by this frame
Definition: frame.h:241
for(j=16;j >0;--j)