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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 "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 * 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) {

  105.     case AV_CODEC_ID_PCM_U32LE:

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

  107.         break;

  108.     case AV_CODEC_ID_PCM_U32BE:

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

  110.         break;

  111.     case AV_CODEC_ID_PCM_S24LE:

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

  113.         break;

  114.     case AV_CODEC_ID_PCM_S24LE_PLANAR:

  115.         ENCODE_PLANAR(int32_t, le24, dst, n, 8, 0)

  116.         break;

  117.     case AV_CODEC_ID_PCM_S24BE:

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

  119.         break;

  120.     case AV_CODEC_ID_PCM_U24LE:

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

  122.         break;

  123.     case AV_CODEC_ID_PCM_U24BE:

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

  125.         break;

  126.     case AV_CODEC_ID_PCM_S24DAUD:

  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;

  135.     case AV_CODEC_ID_PCM_U16LE:

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

  137.         break;

  138.     case AV_CODEC_ID_PCM_U16BE:

  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;

  144.     case AV_CODEC_ID_PCM_S8_PLANAR:

  145.         ENCODE_PLANAR(uint8_t, byte, dst, n, 0, -128)

  146.         break;

  147. #if HAVE_BIGENDIAN

  148.     case AV_CODEC_ID_PCM_S64LE:

  149.     case AV_CODEC_ID_PCM_F64LE:

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

  151.         break;

  152.     case AV_CODEC_ID_PCM_S32LE:

  153.     case AV_CODEC_ID_PCM_F32LE:

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

  155.         break;

  156.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  157.         ENCODE_PLANAR(int32_t, le32, dst, n, 0, 0)

  158.         break;

  159.     case AV_CODEC_ID_PCM_S16LE:

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

  161.         break;

  162.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  163.         ENCODE_PLANAR(int16_t, le16, dst, n, 0, 0)

  164.         break;

  165.     case AV_CODEC_ID_PCM_F64BE:

  166.     case AV_CODEC_ID_PCM_F32BE:

  167.     case AV_CODEC_ID_PCM_S64BE:

  168.     case AV_CODEC_ID_PCM_S32BE:

  169.     case AV_CODEC_ID_PCM_S16BE:

  170. #else

  171.     case AV_CODEC_ID_PCM_S64BE:

  172.     case AV_CODEC_ID_PCM_F64BE:

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

  174.         break;

  175.     case AV_CODEC_ID_PCM_F32BE:

  176.     case AV_CODEC_ID_PCM_S32BE:

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

  178.         break;

  179.     case AV_CODEC_ID_PCM_S16BE:

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

  181.         break;

  182.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  183.         ENCODE_PLANAR(int16_t, be16, dst, n, 0, 0)

  184.         break;

  185.     case AV_CODEC_ID_PCM_F64LE:

  186.     case AV_CODEC_ID_PCM_F32LE:

  187.     case AV_CODEC_ID_PCM_S64LE:

  188.     case AV_CODEC_ID_PCM_S32LE:

  189.     case AV_CODEC_ID_PCM_S16LE:

  190. #endif /* HAVE_BIGENDIAN */

  191.     case AV_CODEC_ID_PCM_U8:

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

  193.         break;

  194. #if HAVE_BIGENDIAN

  195.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  196. #else

  197.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  198.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  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;

  206.     case AV_CODEC_ID_PCM_ALAW:

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

  208.             v      = *samples++;

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

  210.         }

  211.         break;

  212.     case AV_CODEC_ID_PCM_MULAW:

  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. 

  230. static av_cold int pcm_decode_init(AVCodecContext *avctx)

  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) {

  241.     case AV_CODEC_ID_PCM_ALAW:

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

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

  244.         break;

  245.     case AV_CODEC_ID_PCM_MULAW:

  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)

  256.         avctx->bits_per_raw_sample = av_get_bits_per_sample(avctx->codec_id);

  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) {

  347.     case AV_CODEC_ID_PCM_U32LE:

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

  349.         break;

  350.     case AV_CODEC_ID_PCM_U32BE:

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

  352.         break;

  353.     case AV_CODEC_ID_PCM_S24LE:

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

  355.         break;

  356.     case AV_CODEC_ID_PCM_S24LE_PLANAR:

  357.         DECODE_PLANAR(32, le24, src, samples, n, 8, 0);

  358.         break;

  359.     case AV_CODEC_ID_PCM_S24BE:

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

  361.         break;

  362.     case AV_CODEC_ID_PCM_U24LE:

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

  364.         break;

  365.     case AV_CODEC_ID_PCM_U24BE:

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

  367.         break;

  368.     case AV_CODEC_ID_PCM_S24DAUD:

  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;

  377.     case AV_CODEC_ID_PCM_U16LE:

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

  379.         break;

  380.     case AV_CODEC_ID_PCM_U16BE:

  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;

  387.     case AV_CODEC_ID_PCM_S8_PLANAR:

  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

  397.     case AV_CODEC_ID_PCM_S64LE:

  398.     case AV_CODEC_ID_PCM_F64LE:

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

  400.         break;

  401.     case AV_CODEC_ID_PCM_S32LE:

  402.     case AV_CODEC_ID_PCM_F32LE:

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

  404.         break;

  405.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  406.         DECODE_PLANAR(32, le32, src, samples, n, 0, 0);

  407.         break;

  408.     case AV_CODEC_ID_PCM_S16LE:

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

  410.         break;

  411.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  412.         DECODE_PLANAR(16, le16, src, samples, n, 0, 0);

  413.         break;

  414.     case AV_CODEC_ID_PCM_F64BE:

  415.     case AV_CODEC_ID_PCM_F32BE:

  416.     case AV_CODEC_ID_PCM_S64BE:

  417.     case AV_CODEC_ID_PCM_S32BE:

  418.     case AV_CODEC_ID_PCM_S16BE:

  419. #else

  420.     case AV_CODEC_ID_PCM_S64BE:

  421.     case AV_CODEC_ID_PCM_F64BE:

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

  423.         break;

  424.     case AV_CODEC_ID_PCM_F32BE:

  425.     case AV_CODEC_ID_PCM_S32BE:

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

  427.         break;

  428.     case AV_CODEC_ID_PCM_S16BE:

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

  430.         break;

  431.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  432.         DECODE_PLANAR(16, be16, src, samples, n, 0, 0);

  433.         break;

  434.     case AV_CODEC_ID_PCM_F64LE:

  435.     case AV_CODEC_ID_PCM_F32LE:

  436.     case AV_CODEC_ID_PCM_S64LE:

  437.     case AV_CODEC_ID_PCM_S32LE:

  438.     case AV_CODEC_ID_PCM_S16LE:

  439. #endif /* HAVE_BIGENDIAN */

  440.     case AV_CODEC_ID_PCM_U8:

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

  442.         break;

  443. #if HAVE_BIGENDIAN

  444.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  445. #else

  446.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  447.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  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;

  455.     case AV_CODEC_ID_PCM_ZORK:

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

  457.             int v = *src++;

  458.             if (v < 128)

  459.                 v = 128 - v;

  460.             *samples++ = v;

  461.         }

  462.         break;

  463.     case AV_CODEC_ID_PCM_ALAW:

  464.     case AV_CODEC_ID_PCM_MULAW:

  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");