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FFmpeg/libavcodec/pcm.c

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  1. /*

  2.  * PCM codecs

  3.  * Copyright (c) 2001 Fabrice Bellard

  4.  *

  5.  * This file is part of Libav.

  6.  *

  7.  * Libav 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.  * Libav 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 Libav; 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 "avcodec.h"

  28. #include "libavutil/common.h" /* for av_reverse */

  29. #include "bytestream.h"

  30. #include "pcm_tablegen.h"

  31. 

  32. #define MAX_CHANNELS 64

  33. 

  34. static av_cold int pcm_encode_init(AVCodecContext *avctx)

  35. {

  36.     avctx->frame_size = 1;

  37.     switch(avctx->codec->id) {

  38.     case CODEC_ID_PCM_ALAW:

  39.         pcm_alaw_tableinit();

  40.         break;

  41.     case 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->coded_frame= avcodec_alloc_frame();

  51.     avctx->coded_frame->key_frame= 1;

  52. 

  53.     return 0;

  54. }

  55. 

  56. static av_cold int pcm_encode_close(AVCodecContext *avctx)

  57. {

  58.     av_freep(&avctx->coded_frame);

  59. 

  60.     return 0;

  61. }

  62. 

  63. /**

  64.  * Write PCM samples macro

  65.  * @param type Datatype of native machine format

  66.  * @param endian bytestream_put_xxx() suffix

  67.  * @param src Source pointer (variable name)

  68.  * @param dst Destination pointer (variable name)

  69.  * @param n Total number of samples (variable name)

  70.  * @param shift Bitshift (bits)

  71.  * @param offset Sample value offset

  72.  */

  73. #define ENCODE(type, endian, src, dst, n, shift, offset) \

  74.     samples_##type = (const type*) src; \

  75.     for(;n>0;n--) { \

  76.         register type v = (*samples_##type++ >> shift) + offset; \

  77.         bytestream_put_##endian(&dst, v); \

  78.     }

  79. 

  80. static int pcm_encode_frame(AVCodecContext *avctx,

  81.                             unsigned char *frame, int buf_size, void *data)

  82. {

  83.     int n, sample_size, v;

  84.     const short *samples;

  85.     unsigned char *dst;

  86.     const uint8_t *srcu8;

  87.     const int16_t *samples_int16_t;

  88.     const int32_t *samples_int32_t;

  89.     const int64_t *samples_int64_t;

  90.     const uint16_t *samples_uint16_t;

  91.     const uint32_t *samples_uint32_t;

  92. 

  93.     sample_size = av_get_bits_per_sample(avctx->codec->id)/8;

  94.     n = buf_size / sample_size;

  95.     samples = data;

  96.     dst = frame;

  97. 

  98.     switch(avctx->codec->id) {

  99.     case CODEC_ID_PCM_U32LE:

  100.         ENCODE(uint32_t, le32, samples, dst, n, 0, 0x80000000)

  101.         break;

  102.     case CODEC_ID_PCM_U32BE:

  103.         ENCODE(uint32_t, be32, samples, dst, n, 0, 0x80000000)

  104.         break;

  105.     case CODEC_ID_PCM_S24LE:

  106.         ENCODE(int32_t, le24, samples, dst, n, 8, 0)

  107.         break;

  108.     case CODEC_ID_PCM_S24BE:

  109.         ENCODE(int32_t, be24, samples, dst, n, 8, 0)

  110.         break;

  111.     case CODEC_ID_PCM_U24LE:

  112.         ENCODE(uint32_t, le24, samples, dst, n, 8, 0x800000)

  113.         break;

  114.     case CODEC_ID_PCM_U24BE:

  115.         ENCODE(uint32_t, be24, samples, dst, n, 8, 0x800000)

  116.         break;

  117.     case CODEC_ID_PCM_S24DAUD:

  118.         for(;n>0;n--) {

  119.             uint32_t tmp = av_reverse[(*samples >> 8) & 0xff] +

  120.                            (av_reverse[*samples & 0xff] << 8);

  121.             tmp <<= 4; // sync flags would go here

  122.             bytestream_put_be24(&dst, tmp);

  123.             samples++;

  124.         }

  125.         break;

  126.     case CODEC_ID_PCM_U16LE:

  127.         ENCODE(uint16_t, le16, samples, dst, n, 0, 0x8000)

  128.         break;

  129.     case CODEC_ID_PCM_U16BE:

  130.         ENCODE(uint16_t, be16, samples, dst, n, 0, 0x8000)

  131.         break;

  132.     case CODEC_ID_PCM_S8:

  133.         srcu8= data;

  134.         for(;n>0;n--) {

  135.             v = *srcu8++;

  136.             *dst++ = v - 128;

  137.         }

  138.         break;

  139. #if HAVE_BIGENDIAN

  140.     case CODEC_ID_PCM_F64LE:

  141.         ENCODE(int64_t, le64, samples, dst, n, 0, 0)

  142.         break;

  143.     case CODEC_ID_PCM_S32LE:

  144.     case CODEC_ID_PCM_F32LE:

  145.         ENCODE(int32_t, le32, samples, dst, n, 0, 0)

  146.         break;

  147.     case CODEC_ID_PCM_S16LE:

  148.         ENCODE(int16_t, le16, samples, dst, n, 0, 0)

  149.         break;

  150.     case CODEC_ID_PCM_F64BE:

  151.     case CODEC_ID_PCM_F32BE:

  152.     case CODEC_ID_PCM_S32BE:

  153.     case CODEC_ID_PCM_S16BE:

  154. #else

  155.     case CODEC_ID_PCM_F64BE:

  156.         ENCODE(int64_t, be64, samples, dst, n, 0, 0)

  157.         break;

  158.     case CODEC_ID_PCM_F32BE:

  159.     case CODEC_ID_PCM_S32BE:

  160.         ENCODE(int32_t, be32, samples, dst, n, 0, 0)

  161.         break;

  162.     case CODEC_ID_PCM_S16BE:

  163.         ENCODE(int16_t, be16, samples, dst, n, 0, 0)

  164.         break;

  165.     case CODEC_ID_PCM_F64LE:

  166.     case CODEC_ID_PCM_F32LE:

  167.     case CODEC_ID_PCM_S32LE:

  168.     case CODEC_ID_PCM_S16LE:

  169. #endif /* HAVE_BIGENDIAN */

  170.     case CODEC_ID_PCM_U8:

  171.         memcpy(dst, samples, n*sample_size);

  172.         dst += n*sample_size;

  173.         break;

  174.     case CODEC_ID_PCM_ALAW:

  175.         for(;n>0;n--) {

  176.             v = *samples++;

  177.             *dst++ = linear_to_alaw[(v + 32768) >> 2];

  178.         }

  179.         break;

  180.     case CODEC_ID_PCM_MULAW:

  181.         for(;n>0;n--) {

  182.             v = *samples++;

  183.             *dst++ = linear_to_ulaw[(v + 32768) >> 2];

  184.         }

  185.         break;

  186.     default:

  187.         return -1;

  188.     }

  189.     //avctx->frame_size = (dst - frame) / (sample_size * avctx->channels);

  190. 

  191.     return dst - frame;

  192. }

  193. 

  194. typedef struct PCMDecode {

  195.     AVFrame frame;

  196.     short table[256];

  197. } PCMDecode;

  198. 

  199. static av_cold int pcm_decode_init(AVCodecContext * avctx)

  200. {

  201.     PCMDecode *s = avctx->priv_data;

  202.     int i;

  203. 

  204.     if (avctx->channels <= 0 || avctx->channels > MAX_CHANNELS) {

  205.         av_log(avctx, AV_LOG_ERROR, "PCM channels out of bounds\n");

  206.         return AVERROR(EINVAL);

  207.     }

  208. 

  209.     switch(avctx->codec->id) {

  210.     case CODEC_ID_PCM_ALAW:

  211.         for(i=0;i<256;i++)

  212.             s->table[i] = alaw2linear(i);

  213.         break;

  214.     case CODEC_ID_PCM_MULAW:

  215.         for(i=0;i<256;i++)

  216.             s->table[i] = ulaw2linear(i);

  217.         break;

  218.     default:

  219.         break;

  220.     }

  221. 

  222.     avctx->sample_fmt = avctx->codec->sample_fmts[0];

  223. 

  224.     if (avctx->sample_fmt == AV_SAMPLE_FMT_S32)

  225.         avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec->id);

  226. 

  227.     avcodec_get_frame_defaults(&s->frame);

  228.     avctx->coded_frame = &s->frame;

  229. 

  230.     return 0;

  231. }

  232. 

  233. /**

  234.  * Read PCM samples macro

  235.  * @param size Data size of native machine format

  236.  * @param endian bytestream_get_xxx() endian suffix

  237.  * @param src Source pointer (variable name)

  238.  * @param dst Destination pointer (variable name)

  239.  * @param n Total number of samples (variable name)

  240.  * @param shift Bitshift (bits)

  241.  * @param offset Sample value offset

  242.  */

  243. #define DECODE(size, endian, src, dst, n, shift, offset) \

  244.     for(;n>0;n--) { \

  245.         uint##size##_t v = bytestream_get_##endian(&src); \

  246.         AV_WN##size##A(dst, (v - offset) << shift); \

  247.         dst += size / 8; \

  248.     }

  249. 

  250. static int pcm_decode_frame(AVCodecContext *avctx, void *data,

  251.                             int *got_frame_ptr, AVPacket *avpkt)

  252. {

  253.     const uint8_t *src = avpkt->data;

  254.     int buf_size = avpkt->size;

  255.     PCMDecode *s = avctx->priv_data;

  256.     int sample_size, c, n, ret, samples_per_block;

  257.     uint8_t *samples;

  258.     int32_t *dst_int32_t;

  259. 

  260.     sample_size = av_get_bits_per_sample(avctx->codec_id)/8;

  261. 

  262.     /* av_get_bits_per_sample returns 0 for CODEC_ID_PCM_DVD */

  263.     samples_per_block = 1;

  264.     if (CODEC_ID_PCM_DVD == avctx->codec_id) {

  265.         if (avctx->bits_per_coded_sample != 20 &&

  266.             avctx->bits_per_coded_sample != 24) {

  267.             av_log(avctx, AV_LOG_ERROR, "PCM DVD unsupported sample depth\n");

  268.             return AVERROR(EINVAL);

  269.         }

  270.         /* 2 samples are interleaved per block in PCM_DVD */

  271.         samples_per_block = 2;

  272.         sample_size = avctx->bits_per_coded_sample * 2 / 8;

  273.     } else if (avctx->codec_id == CODEC_ID_PCM_LXF) {

  274.         /* we process 40-bit blocks per channel for LXF */

  275.         samples_per_block = 2;

  276.         sample_size = 5;

  277.     }

  278. 

  279.     if (sample_size == 0) {

  280.         av_log(avctx, AV_LOG_ERROR, "Invalid sample_size\n");

  281.         return AVERROR(EINVAL);

  282.     }

  283. 

  284.     n = avctx->channels * sample_size;

  285. 

  286.     if(n && buf_size % n){

  287.         if (buf_size < n) {

  288.             av_log(avctx, AV_LOG_ERROR, "invalid PCM packet\n");

  289.             return -1;

  290.         }else

  291.             buf_size -= buf_size % n;

  292.     }

  293. 

  294.     n = buf_size/sample_size;

  295. 

  296.     /* get output buffer */

  297.     s->frame.nb_samples = n * samples_per_block / avctx->channels;

  298.     if ((ret = avctx->get_buffer(avctx, &s->frame)) < 0) {

  299.         av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");

  300.         return ret;

  301.     }

  302.     samples = s->frame.data[0];

  303. 

  304.     switch(avctx->codec->id) {

  305.     case CODEC_ID_PCM_U32LE:

  306.         DECODE(32, le32, src, samples, n, 0, 0x80000000)

  307.         break;

  308.     case CODEC_ID_PCM_U32BE:

  309.         DECODE(32, be32, src, samples, n, 0, 0x80000000)

  310.         break;

  311.     case CODEC_ID_PCM_S24LE:

  312.         DECODE(32, le24, src, samples, n, 8, 0)

  313.         break;

  314.     case CODEC_ID_PCM_S24BE:

  315.         DECODE(32, be24, src, samples, n, 8, 0)

  316.         break;

  317.     case CODEC_ID_PCM_U24LE:

  318.         DECODE(32, le24, src, samples, n, 8, 0x800000)

  319.         break;

  320.     case CODEC_ID_PCM_U24BE:

  321.         DECODE(32, be24, src, samples, n, 8, 0x800000)

  322.         break;

  323.     case CODEC_ID_PCM_S24DAUD:

  324.         for(;n>0;n--) {

  325.           uint32_t v = bytestream_get_be24(&src);

  326.           v >>= 4; // sync flags are here

  327.           AV_WN16A(samples, av_reverse[(v >> 8) & 0xff] +

  328.                            (av_reverse[v & 0xff] << 8));

  329.           samples += 2;

  330.         }

  331.         break;

  332.     case CODEC_ID_PCM_S16LE_PLANAR:

  333.     {

  334.         const uint8_t *src2[MAX_CHANNELS];

  335.         n /= avctx->channels;

  336.         for(c=0;c<avctx->channels;c++)

  337.             src2[c] = &src[c*n*2];

  338.         for(;n>0;n--)

  339.             for(c=0;c<avctx->channels;c++) {

  340.                 AV_WN16A(samples, bytestream_get_le16(&src2[c]));

  341.                 samples += 2;

  342.             }

  343.         break;

  344.     }

  345.     case CODEC_ID_PCM_U16LE:

  346.         DECODE(16, le16, src, samples, n, 0, 0x8000)

  347.         break;

  348.     case CODEC_ID_PCM_U16BE:

  349.         DECODE(16, be16, src, samples, n, 0, 0x8000)

  350.         break;

  351.     case CODEC_ID_PCM_S8:

  352.         for(;n>0;n--) {

  353.             *samples++ = *src++ + 128;

  354.         }

  355.         break;

  356. #if HAVE_BIGENDIAN

  357.     case CODEC_ID_PCM_F64LE:

  358.         DECODE(64, le64, src, samples, n, 0, 0)

  359.         break;

  360.     case CODEC_ID_PCM_S32LE:

  361.     case CODEC_ID_PCM_F32LE:

  362.         DECODE(32, le32, src, samples, n, 0, 0)

  363.         break;

  364.     case CODEC_ID_PCM_S16LE:

  365.         DECODE(16, le16, src, samples, n, 0, 0)

  366.         break;

  367.     case CODEC_ID_PCM_F64BE:

  368.     case CODEC_ID_PCM_F32BE:

  369.     case CODEC_ID_PCM_S32BE:

  370.     case CODEC_ID_PCM_S16BE:

  371. #else

  372.     case CODEC_ID_PCM_F64BE:

  373.         DECODE(64, be64, src, samples, n, 0, 0)

  374.         break;

  375.     case CODEC_ID_PCM_F32BE:

  376.     case CODEC_ID_PCM_S32BE:

  377.         DECODE(32, be32, src, samples, n, 0, 0)

  378.         break;

  379.     case CODEC_ID_PCM_S16BE:

  380.         DECODE(16, be16, src, samples, n, 0, 0)

  381.         break;

  382.     case CODEC_ID_PCM_F64LE:

  383.     case CODEC_ID_PCM_F32LE:

  384.     case CODEC_ID_PCM_S32LE:

  385.     case CODEC_ID_PCM_S16LE:

  386. #endif /* HAVE_BIGENDIAN */

  387.     case CODEC_ID_PCM_U8:

  388.         memcpy(samples, src, n*sample_size);

  389.         break;

  390.     case CODEC_ID_PCM_ZORK:

  391.         for (; n > 0; n--) {

  392.             int v = *src++;

  393.             if (v < 128)

  394.                 v = 128 - v;

  395.             *samples++ = v;

  396.         }

  397.         break;

  398.     case CODEC_ID_PCM_ALAW:

  399.     case CODEC_ID_PCM_MULAW:

  400.         for(;n>0;n--) {

  401.             AV_WN16A(samples, s->table[*src++]);

  402.             samples += 2;

  403.         }

  404.         break;

  405.     case CODEC_ID_PCM_DVD:

  406.     {

  407.         const uint8_t *src8;

  408.         dst_int32_t = (int32_t *)s->frame.data[0];

  409.         n /= avctx->channels;

  410.         switch (avctx->bits_per_coded_sample) {

  411.         case 20:

  412.             while (n--) {

  413.                 c = avctx->channels;

  414.                 src8 = src + 4*c;

  415.                 while (c--) {

  416.                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8   &0xf0) << 8);

  417.                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++ &0x0f) << 12);

  418.                 }

  419.                 src = src8;

  420.             }

  421.             break;

  422.         case 24:

  423.             while (n--) {

  424.                 c = avctx->channels;

  425.                 src8 = src + 4*c;

  426.                 while (c--) {

  427.                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);

  428.                     *dst_int32_t++ = (bytestream_get_be16(&src) << 16) + ((*src8++) << 8);

  429.                 }

  430.                 src = src8;

  431.             }

  432.             break;

  433.         }

  434.         break;

  435.     }

  436.     case CODEC_ID_PCM_LXF:

  437.     {

  438.         int i;

  439.         const uint8_t *src8;

  440.         dst_int32_t = (int32_t *)s->frame.data[0];

  441.         n /= avctx->channels;

  442.         //unpack and de-planerize

  443.         for (i = 0; i < n; i++) {

  444.             for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) {

  445.                 //extract low 20 bits and expand to 32 bits

  446.                 *dst_int32_t++ = (src8[2] << 28) | (src8[1] << 20) | (src8[0] << 12) |

  447.                                  ((src8[2] & 0xF) << 8) | src8[1];

  448.             }

  449. 

  450.             for (c = 0, src8 = src + i*5; c < avctx->channels; c++, src8 += n*5) {

  451.                 //extract high 20 bits and expand to 32 bits

  452.                 *dst_int32_t++ = (src8[4] << 24) | (src8[3] << 16) |

  453.                                  ((src8[2] & 0xF0) << 8) | (src8[4] << 4) | (src8[3] >> 4);

  454.             }

  455.         }

  456.         break;

  457.     }

  458.     default:

  459.         return -1;

  460.     }

  461. 

  462.     *got_frame_ptr   = 1;

  463.     *(AVFrame *)data = s->frame;

  464. 

  465.     return buf_size;

  466. }

  467. 

  468. #if CONFIG_ENCODERS

  469. #define PCM_ENCODER(id_,sample_fmt_,name_,long_name_) \

  470. AVCodec ff_ ## name_ ## _encoder = {            \

  471.     .name        = #name_,                      \

  472.     .type        = AVMEDIA_TYPE_AUDIO,          \

  473.     .id          = id_,                         \

  474.     .init        = pcm_encode_init,             \

  475.     .encode      = pcm_encode_frame,            \

  476.     .close       = pcm_encode_close,            \

  477.     .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \

  478.     .long_name = NULL_IF_CONFIG_SMALL(long_name_), \

  479. }

  480. #else

  481. #define PCM_ENCODER(id,sample_fmt_,name,long_name_)

  482. #endif

  483. 

  484. #if CONFIG_DECODERS

  485. #define PCM_DECODER(id_,sample_fmt_,name_,long_name_)         \

  486. AVCodec ff_ ## name_ ## _decoder = {            \

  487.     .name           = #name_,                   \

  488.     .type           = AVMEDIA_TYPE_AUDIO,       \

  489.     .id             = id_,                      \

  490.     .priv_data_size = sizeof(PCMDecode),        \

  491.     .init           = pcm_decode_init,          \

  492.     .decode         = pcm_decode_frame,         \

  493.     .capabilities   = CODEC_CAP_DR1,            \

  494.     .sample_fmts = (const enum AVSampleFormat[]){sample_fmt_,AV_SAMPLE_FMT_NONE}, \

  495.     .long_name = NULL_IF_CONFIG_SMALL(long_name_), \

  496. }

  497. #else

  498. #define PCM_DECODER(id,sample_fmt_,name,long_name_)

  499. #endif

  500. 

  501. #define PCM_CODEC(id, sample_fmt_, name, long_name_)         \

  502.     PCM_ENCODER(id,sample_fmt_,name,long_name_); PCM_DECODER(id,sample_fmt_,name,long_name_)

  503. 

  504. /* Note: Do not forget to add new entries to the Makefile as well. */

  505. PCM_CODEC  (CODEC_ID_PCM_ALAW,  AV_SAMPLE_FMT_S16, pcm_alaw, "PCM A-law");

  506. PCM_DECODER(CODEC_ID_PCM_DVD,   AV_SAMPLE_FMT_S32, pcm_dvd, "PCM signed 20|24-bit big-endian");

  507. PCM_CODEC  (CODEC_ID_PCM_F32BE, AV_SAMPLE_FMT_FLT, pcm_f32be, "PCM 32-bit floating point big-endian");

  508. PCM_CODEC  (CODEC_ID_PCM_F32LE, AV_SAMPLE_FMT_FLT, pcm_f32le, "PCM 32-bit floating point little-endian");

  509. PCM_CODEC  (CODEC_ID_PCM_F64BE, AV_SAMPLE_FMT_DBL, pcm_f64be, "PCM 64-bit floating point big-endian");

  510. PCM_CODEC  (CODEC_ID_PCM_F64LE, AV_SAMPLE_FMT_DBL, pcm_f64le, "PCM 64-bit floating point little-endian");

  511. PCM_DECODER(CODEC_ID_PCM_LXF,   AV_SAMPLE_FMT_S32, pcm_lxf, "PCM signed 20-bit little-endian planar");

  512. PCM_CODEC  (CODEC_ID_PCM_MULAW, AV_SAMPLE_FMT_S16, pcm_mulaw, "PCM mu-law");

  513. PCM_CODEC  (CODEC_ID_PCM_S8,    AV_SAMPLE_FMT_U8,  pcm_s8, "PCM signed 8-bit");

  514. PCM_CODEC  (CODEC_ID_PCM_S16BE, AV_SAMPLE_FMT_S16, pcm_s16be, "PCM signed 16-bit big-endian");

  515. PCM_CODEC  (CODEC_ID_PCM_S16LE, AV_SAMPLE_FMT_S16, pcm_s16le, "PCM signed 16-bit little-endian");

  516. PCM_DECODER(CODEC_ID_PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16, pcm_s16le_planar, "PCM 16-bit little-endian planar");

  517. PCM_CODEC  (CODEC_ID_PCM_S24BE, AV_SAMPLE_FMT_S32, pcm_s24be, "PCM signed 24-bit big-endian");

  518. PCM_CODEC  (CODEC_ID_PCM_S24DAUD, AV_SAMPLE_FMT_S16,  pcm_s24daud, "PCM D-Cinema audio signed 24-bit");

  519. PCM_CODEC  (CODEC_ID_PCM_S24LE, AV_SAMPLE_FMT_S32, pcm_s24le, "PCM signed 24-bit little-endian");

  520. PCM_CODEC  (CODEC_ID_PCM_S32BE, AV_SAMPLE_FMT_S32, pcm_s32be, "PCM signed 32-bit big-endian");

  521. PCM_CODEC  (CODEC_ID_PCM_S32LE, AV_SAMPLE_FMT_S32, pcm_s32le, "PCM signed 32-bit little-endian");

  522. PCM_CODEC  (CODEC_ID_PCM_U8,    AV_SAMPLE_FMT_U8,  pcm_u8, "PCM unsigned 8-bit");

  523. PCM_CODEC  (CODEC_ID_PCM_U16BE, AV_SAMPLE_FMT_S16, pcm_u16be, "PCM unsigned 16-bit big-endian");

  524. PCM_CODEC  (CODEC_ID_PCM_U16LE, AV_SAMPLE_FMT_S16, pcm_u16le, "PCM unsigned 16-bit little-endian");

  525. PCM_CODEC  (CODEC_ID_PCM_U24BE, AV_SAMPLE_FMT_S32, pcm_u24be, "PCM unsigned 24-bit big-endian");

  526. PCM_CODEC  (CODEC_ID_PCM_U24LE, AV_SAMPLE_FMT_S32, pcm_u24le, "PCM unsigned 24-bit little-endian");

  527. PCM_CODEC  (CODEC_ID_PCM_U32BE, AV_SAMPLE_FMT_S32, pcm_u32be, "PCM unsigned 32-bit big-endian");

  528. PCM_CODEC  (CODEC_ID_PCM_U32LE, AV_SAMPLE_FMT_S32, pcm_u32le, "PCM unsigned 32-bit little-endian");

  529. PCM_DECODER(CODEC_ID_PCM_ZORK,  AV_SAMPLE_FMT_U8,  pcm_zork,  "PCM Zork");