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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 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 "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.     short table[256];

  196. } PCMDecode;

  197. 

  198. static av_cold int pcm_decode_init(AVCodecContext * avctx)

  199. {

  200.     PCMDecode *s = avctx->priv_data;

  201.     int i;

  202. 

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

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

  205.         return AVERROR(EINVAL);

  206.     }

  207. 

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

  209.     case CODEC_ID_PCM_ALAW:

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

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

  212.         break;

  213.     case CODEC_ID_PCM_MULAW:

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

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

  216.         break;

  217.     default:

  218.         break;

  219.     }

  220. 

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

  222. 

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

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

  225. 

  226.     return 0;

  227. }

  228. 

  229. /**

  230.  * Read PCM samples macro

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

  232.  * @param endian bytestream_get_xxx() endian suffix

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

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

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

  236.  * @param shift Bitshift (bits)

  237.  * @param offset Sample value offset

  238.  */

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

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

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

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

  243.         dst += size / 8; \

  244.     }

  245. 

  246. static int pcm_decode_frame(AVCodecContext *avctx,

  247.                             void *data, int *data_size,

  248.                             AVPacket *avpkt)

  249. {

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

  251.     int buf_size = avpkt->size;

  252.     PCMDecode *s = avctx->priv_data;

  253.     int sample_size, c, n, out_size;

  254.     uint8_t *samples;

  255.     int32_t *dst_int32_t;

  256. 

  257.     samples = data;

  258. 

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

  260. 

  261.     /* av_get_bits_per_sample returns 0 for CODEC_ID_PCM_DVD */

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

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

  264.             avctx->bits_per_coded_sample != 24) {

  265.             av_log(avctx, AV_LOG_ERROR,

  266.                    "PCM DVD unsupported sample depth %i\n",

  267.                    avctx->bits_per_coded_sample);

  268.             return AVERROR(EINVAL);

  269.         }

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

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

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

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

  274.         sample_size = 5;

  275. 

  276.     if (sample_size == 0) {

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

  278.         return AVERROR(EINVAL);

  279.     }

  280. 

  281.     n = avctx->channels * sample_size;

  282. 

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

  284.         if (buf_size < n) {

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

  286.             return -1;

  287.         }else

  288.             buf_size -= buf_size % n;

  289.     }

  290. 

  291.     n = buf_size/sample_size;

  292. 

  293.     out_size = n * av_get_bytes_per_sample(avctx->sample_fmt);

  294.     if (avctx->codec_id == CODEC_ID_PCM_DVD ||

  295.         avctx->codec_id == CODEC_ID_PCM_LXF)

  296.         out_size *= 2;

  297.     if (*data_size < out_size) {

  298.         av_log(avctx, AV_LOG_ERROR, "output buffer too small\n");

  299.         return AVERROR(EINVAL);

  300.     }

  301. 

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

  303.     case CODEC_ID_PCM_U32LE:

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

  305.         break;

  306.     case CODEC_ID_PCM_U32BE:

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

  308.         break;

  309.     case CODEC_ID_PCM_S24LE:

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

  311.         break;

  312.     case CODEC_ID_PCM_S24BE:

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

  314.         break;

  315.     case CODEC_ID_PCM_U24LE:

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

  317.         break;

  318.     case CODEC_ID_PCM_U24BE:

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

  320.         break;

  321.     case CODEC_ID_PCM_S24DAUD:

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

  323.           uint32_t v = bytestream_get_be24(&src);

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

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

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

  327.           samples += 2;

  328.         }

  329.         break;

  330.     case CODEC_ID_PCM_S16LE_PLANAR:

  331.     {

  332.         const uint8_t *src2[MAX_CHANNELS];

  333.         n /= avctx->channels;

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

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

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

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

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

  339.                 samples += 2;

  340.             }

  341.         break;

  342.     }

  343.     case CODEC_ID_PCM_U16LE:

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

  345.         break;

  346.     case CODEC_ID_PCM_U16BE:

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

  348.         break;

  349.     case CODEC_ID_PCM_S8:

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

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

  352.         }

  353.         break;

  354. #if HAVE_BIGENDIAN

  355.     case CODEC_ID_PCM_F64LE:

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

  357.         break;

  358.     case CODEC_ID_PCM_S32LE:

  359.     case CODEC_ID_PCM_F32LE:

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

  361.         break;

  362.     case CODEC_ID_PCM_S16LE:

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

  364.         break;

  365.     case CODEC_ID_PCM_F64BE:

  366.     case CODEC_ID_PCM_F32BE:

  367.     case CODEC_ID_PCM_S32BE:

  368.     case CODEC_ID_PCM_S16BE:

  369. #else

  370.     case CODEC_ID_PCM_F64BE:

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

  372.         break;

  373.     case CODEC_ID_PCM_F32BE:

  374.     case CODEC_ID_PCM_S32BE:

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

  376.         break;

  377.     case CODEC_ID_PCM_S16BE:

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

  379.         break;

  380.     case CODEC_ID_PCM_F64LE:

  381.     case CODEC_ID_PCM_F32LE:

  382.     case CODEC_ID_PCM_S32LE:

  383.     case CODEC_ID_PCM_S16LE:

  384. #endif /* HAVE_BIGENDIAN */

  385.     case CODEC_ID_PCM_U8:

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

  387.         samples += n * sample_size;

  388.         break;

  389.     case CODEC_ID_PCM_ZORK:

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

  391.             int v = *src++;

  392.             if (v < 128)

  393.                 v = 128 - v;

  394.             *samples++ = v;

  395.         }

  396.         break;

  397.     case CODEC_ID_PCM_ALAW:

  398.     case CODEC_ID_PCM_MULAW:

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

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

  401.             samples += 2;

  402.         }

  403.         break;

  404.     case CODEC_ID_PCM_DVD:

  405.     {

  406.         const uint8_t *src8;

  407.         dst_int32_t = data;

  408.         n /= avctx->channels;

  409.         switch (avctx->bits_per_coded_sample) {

  410.         case 20:

  411.             while (n--) {

  412.                 c = avctx->channels;

  413.                 src8 = src + 4*c;

  414.                 while (c--) {

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

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

  417.                 }

  418.                 src = src8;

  419.             }

  420.             break;

  421.         case 24:

  422.             while (n--) {

  423.                 c = avctx->channels;

  424.                 src8 = src + 4*c;

  425.                 while (c--) {

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

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

  428.                 }

  429.                 src = src8;

  430.             }

  431.             break;

  432.         }

  433.         samples = (uint8_t *) dst_int32_t;

  434.         break;

  435.     }

  436.     case CODEC_ID_PCM_LXF:

  437.     {

  438.         int i;

  439.         const uint8_t *src8;

  440.         dst_int32_t = data;

  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.         samples = (uint8_t *) dst_int32_t;

  457.         break;

  458.     }

  459.     default:

  460.         return -1;

  461.     }

  462.     *data_size = out_size;

  463.     return buf_size;

  464. }

  465. 

  466. #if CONFIG_ENCODERS

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

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

  469.     .name        = #name_,                      \

  470.     .type        = AVMEDIA_TYPE_AUDIO,          \

  471.     .id          = id_,                         \

  472.     .init        = pcm_encode_init,             \

  473.     .encode      = pcm_encode_frame,            \

  474.     .close       = pcm_encode_close,            \

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

  476.     .long_name = NULL_IF_CONFIG_SMALL(long_name_), \

  477. }

  478. #else

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

  480. #endif

  481. 

  482. #if CONFIG_DECODERS

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

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

  485.     .name           = #name_,                   \

  486.     .type           = AVMEDIA_TYPE_AUDIO,       \

  487.     .id             = id_,                      \

  488.     .priv_data_size = sizeof(PCMDecode),        \

  489.     .init           = pcm_decode_init,          \

  490.     .decode         = pcm_decode_frame,         \

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

  492.     .long_name = NULL_IF_CONFIG_SMALL(long_name_), \

  493. }

  494. #else

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

  496. #endif

  497. 

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

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

  500. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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