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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 * avctx->sample_rate * 8;

  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, 0)) < 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_F64LE:

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

  150.         break;

  151.     case AV_CODEC_ID_PCM_S32LE:

  152.     case AV_CODEC_ID_PCM_F32LE:

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

  154.         break;

  155.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

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

  157.         break;

  158.     case AV_CODEC_ID_PCM_S16LE:

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

  160.         break;

  161.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

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

  163.         break;

  164.     case AV_CODEC_ID_PCM_F64BE:

  165.     case AV_CODEC_ID_PCM_F32BE:

  166.     case AV_CODEC_ID_PCM_S32BE:

  167.     case AV_CODEC_ID_PCM_S16BE:

  168. #else

  169.     case AV_CODEC_ID_PCM_F64BE:

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

  171.         break;

  172.     case AV_CODEC_ID_PCM_F32BE:

  173.     case AV_CODEC_ID_PCM_S32BE:

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

  175.         break;

  176.     case AV_CODEC_ID_PCM_S16BE:

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

  178.         break;

  179.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

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

  181.         break;

  182.     case AV_CODEC_ID_PCM_F64LE:

  183.     case AV_CODEC_ID_PCM_F32LE:

  184.     case AV_CODEC_ID_PCM_S32LE:

  185.     case AV_CODEC_ID_PCM_S16LE:

  186. #endif /* HAVE_BIGENDIAN */

  187.     case AV_CODEC_ID_PCM_U8:

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

  189.         break;

  190. #if HAVE_BIGENDIAN

  191.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  192. #else

  193.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  194.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  195. #endif /* HAVE_BIGENDIAN */

  196.         n /= avctx->channels;

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

  198.             const uint8_t *src = frame->extended_data[c];

  199.             bytestream_put_buffer(&dst, src, n * sample_size);

  200.         }

  201.         break;

  202.     case AV_CODEC_ID_PCM_ALAW:

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

  204.             v      = *samples++;

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

  206.         }

  207.         break;

  208.     case AV_CODEC_ID_PCM_MULAW:

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

  210.             v      = *samples++;

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

  212.         }

  213.         break;

  214.     default:

  215.         return -1;

  216.     }

  217. 

  218.     *got_packet_ptr = 1;

  219.     return 0;

  220. }

  221. 

  222. typedef struct PCMDecode {

  223.     short   table[256];

  224. } PCMDecode;

  225. 

  226. static av_cold int pcm_decode_init(AVCodecContext *avctx)

  227. {

  228.     PCMDecode *s = avctx->priv_data;

  229.     int i;

  230. 

  231.     if (avctx->channels <= 0) {

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

  233.         return AVERROR(EINVAL);

  234.     }

  235. 

  236.     switch (avctx->codec_id) {

  237.     case AV_CODEC_ID_PCM_ALAW:

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

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

  240.         break;

  241.     case AV_CODEC_ID_PCM_MULAW:

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

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

  244.         break;

  245.     default:

  246.         break;

  247.     }

  248. 

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

  250. 

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

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

  253. 

  254.     return 0;

  255. }

  256. 

  257. /**

  258.  * Read PCM samples macro

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

  260.  * @param endian bytestream_get_xxx() endian suffix

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

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

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

  264.  * @param shift  Bitshift (bits)

  265.  * @param offset Sample value offset

  266.  */

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

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

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

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

  271.         dst += size / 8;                                                \

  272.     }

  273. 

  274. #define DECODE_PLANAR(size, endian, src, dst, n, shift, offset)         \

  275.     n /= avctx->channels;                                               \

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

  277.         int i;                                                          \

  278.         dst = frame->extended_data[c];                                \

  279.         for (i = n; i > 0; i--) {                                       \

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

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

  282.             dst += size / 8;                                            \

  283.         }                                                               \

  284.     }

  285. 

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

  287.                             int *got_frame_ptr, AVPacket *avpkt)

  288. {

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

  290.     int buf_size       = avpkt->size;

  291.     PCMDecode *s       = avctx->priv_data;

  292.     AVFrame *frame     = data;

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

  294.     uint8_t *samples;

  295.     int32_t *dst_int32_t;

  296. 

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

  298. 

  299.     /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */

  300.     samples_per_block = 1;

  301.     if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {

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

  303.         samples_per_block = 2;

  304.         sample_size       = 5;

  305.     }

  306. 

  307.     if (sample_size == 0) {

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

  309.         return AVERROR(EINVAL);

  310.     }

  311. 

  312.     if (avctx->channels == 0) {

  313.         av_log(avctx, AV_LOG_ERROR, "Invalid number of channels\n");

  314.         return AVERROR(EINVAL);

  315.     }

  316. 

  317.     if (avctx->codec_id != avctx->codec->id) {

  318.         av_log(avctx, AV_LOG_ERROR, "codec ids mismatch\n");

  319.         return AVERROR(EINVAL);

  320.     }

  321. 

  322.     n = avctx->channels * sample_size;

  323. 

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

  325.         if (buf_size < n) {

  326.             av_log(avctx, AV_LOG_ERROR,

  327.                    "Invalid PCM packet, data has size %d but at least a size of %d was expected\n",

  328.                    buf_size, n);

  329.             return AVERROR_INVALIDDATA;

  330.         } else

  331.             buf_size -= buf_size % n;

  332.     }

  333. 

  334.     n = buf_size / sample_size;

  335. 

  336.     /* get output buffer */

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

  338.     if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)

  339.         return ret;

  340.     samples = frame->data[0];

  341. 

  342.     switch (avctx->codec_id) {

  343.     case AV_CODEC_ID_PCM_U32LE:

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

  345.         break;

  346.     case AV_CODEC_ID_PCM_U32BE:

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

  348.         break;

  349.     case AV_CODEC_ID_PCM_S24LE:

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

  351.         break;

  352.     case AV_CODEC_ID_PCM_S24LE_PLANAR:

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

  354.         break;

  355.     case AV_CODEC_ID_PCM_S24BE:

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

  357.         break;

  358.     case AV_CODEC_ID_PCM_U24LE:

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

  360.         break;

  361.     case AV_CODEC_ID_PCM_U24BE:

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

  363.         break;

  364.     case AV_CODEC_ID_PCM_S24DAUD:

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

  366.             uint32_t v = bytestream_get_be24(&src);

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

  368.             AV_WN16A(samples, ff_reverse[(v >> 8) & 0xff] +

  369.                              (ff_reverse[v        & 0xff] << 8));

  370.             samples += 2;

  371.         }

  372.         break;

  373.     case AV_CODEC_ID_PCM_U16LE:

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

  375.         break;

  376.     case AV_CODEC_ID_PCM_U16BE:

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

  378.         break;

  379.     case AV_CODEC_ID_PCM_S8:

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

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

  382.         break;

  383.     case AV_CODEC_ID_PCM_S8_PLANAR:

  384.         n /= avctx->channels;

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

  386.             int i;

  387.             samples = frame->extended_data[c];

  388.             for (i = n; i > 0; i--)

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

  390.         }

  391.         break;

  392. #if HAVE_BIGENDIAN

  393.     case AV_CODEC_ID_PCM_F64LE:

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

  395.         break;

  396.     case AV_CODEC_ID_PCM_S32LE:

  397.     case AV_CODEC_ID_PCM_F32LE:

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

  399.         break;

  400.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

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

  402.         break;

  403.     case AV_CODEC_ID_PCM_S16LE:

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

  405.         break;

  406.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

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

  408.         break;

  409.     case AV_CODEC_ID_PCM_F64BE:

  410.     case AV_CODEC_ID_PCM_F32BE:

  411.     case AV_CODEC_ID_PCM_S32BE:

  412.     case AV_CODEC_ID_PCM_S16BE:

  413. #else

  414.     case AV_CODEC_ID_PCM_F64BE:

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

  416.         break;

  417.     case AV_CODEC_ID_PCM_F32BE:

  418.     case AV_CODEC_ID_PCM_S32BE:

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

  420.         break;

  421.     case AV_CODEC_ID_PCM_S16BE:

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

  423.         break;

  424.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

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

  426.         break;

  427.     case AV_CODEC_ID_PCM_F64LE:

  428.     case AV_CODEC_ID_PCM_F32LE:

  429.     case AV_CODEC_ID_PCM_S32LE:

  430.     case AV_CODEC_ID_PCM_S16LE:

  431. #endif /* HAVE_BIGENDIAN */

  432.     case AV_CODEC_ID_PCM_U8:

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

  434.         break;

  435. #if HAVE_BIGENDIAN

  436.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  437. #else

  438.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  439.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  440. #endif /* HAVE_BIGENDIAN */

  441.         n /= avctx->channels;

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

  443.             samples = frame->extended_data[c];

  444.             bytestream_get_buffer(&src, samples, n * sample_size);

  445.         }

  446.         break;

  447.     case AV_CODEC_ID_PCM_ZORK:

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

  449.             int v = *src++;

  450.             if (v < 128)

  451.                 v = 128 - v;

  452.             *samples++ = v;

  453.         }

  454.         break;

  455.     case AV_CODEC_ID_PCM_ALAW:

  456.     case AV_CODEC_ID_PCM_MULAW:

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

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

  459.             samples += 2;

  460.         }

  461.         break;

  462.     case AV_CODEC_ID_PCM_LXF:

  463.     {

  464.         int i;

  465.         n /= avctx->channels;

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

  467.             dst_int32_t = (int32_t *)frame->extended_data[c];

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

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

  470.                 *dst_int32_t++ =  (src[2]         << 28) |

  471.                                   (src[1]         << 20) |

  472.                                   (src[0]         << 12) |

  473.                                  ((src[2] & 0x0F) <<  8) |

  474.                                    src[1];

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

  476.                 *dst_int32_t++ =  (src[4]         << 24) |

  477.                                   (src[3]         << 16) |

  478.                                  ((src[2] & 0xF0) <<  8) |

  479.                                   (src[4]         <<  4) |

  480.                                   (src[3]         >>  4);

  481.                 src += 5;

  482.             }

  483.         }

  484.         break;

  485.     }

  486.     default:

  487.         return -1;

  488.     }

  489. 

  490.     *got_frame_ptr = 1;

  491. 

  492.     return buf_size;

  493. }

  494. 

  495. #define PCM_ENCODER_0(id_, sample_fmt_, name_, long_name_)

  496. #define PCM_ENCODER_1(id_, sample_fmt_, name_, long_name_)                  \

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

  498.     .name         = #name_,                                                 \

  499.     .long_name    = NULL_IF_CONFIG_SMALL(long_name_),                       \

  500.     .type         = AVMEDIA_TYPE_AUDIO,                                     \

  501.     .id           = AV_CODEC_ID_ ## id_,                                    \

  502.     .init         = pcm_encode_init,                                        \

  503.     .encode2      = pcm_encode_frame,                                       \

  504.     .capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE,                          \

  505.     .sample_fmts  = (const enum AVSampleFormat[]){ sample_fmt_,             \

  506.                                                    AV_SAMPLE_FMT_NONE },    \

  507. }

  508. 

  509. #define PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)                  \

  510.     PCM_ENCODER_ ## cf(id, sample_fmt, name, long_name)

  511. #define PCM_ENCODER_3(cf, id, sample_fmt, name, long_name)                  \

  512.     PCM_ENCODER_2(cf, id, sample_fmt, name, long_name)

  513. #define PCM_ENCODER(id, sample_fmt, name, long_name)                        \

  514.     PCM_ENCODER_3(CONFIG_ ## id ## _ENCODER, id, sample_fmt, name, long_name)

  515. 

  516. #define PCM_DECODER_0(id, sample_fmt, name, long_name)

  517. #define PCM_DECODER_1(id_, sample_fmt_, name_, long_name_)                  \

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

  519.     .name           = #name_,                                               \

  520.     .long_name      = NULL_IF_CONFIG_SMALL(long_name_),                     \

  521.     .type           = AVMEDIA_TYPE_AUDIO,                                   \

  522.     .id             = AV_CODEC_ID_ ## id_,                                  \

  523.     .priv_data_size = sizeof(PCMDecode),                                    \

  524.     .init           = pcm_decode_init,                                      \

  525.     .decode         = pcm_decode_frame,                                     \

  526.     .capabilities   = CODEC_CAP_DR1,                                        \

  527.     .sample_fmts    = (const enum AVSampleFormat[]){ sample_fmt_,           \

  528.                                                      AV_SAMPLE_FMT_NONE },  \

  529. }

  530. 

  531. #define PCM_DECODER_2(cf, id, sample_fmt, name, long_name)                  \

  532.     PCM_DECODER_ ## cf(id, sample_fmt, name, long_name)

  533. #define PCM_DECODER_3(cf, id, sample_fmt, name, long_name)                  \

  534.     PCM_DECODER_2(cf, id, sample_fmt, name, long_name)

  535. #define PCM_DECODER(id, sample_fmt, name, long_name)                        \

  536.     PCM_DECODER_3(CONFIG_ ## id ## _DECODER, id, sample_fmt, name, long_name)

  537. 

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

  539.     PCM_ENCODER(id, sample_fmt_, name, long_name_);                     \

  540.     PCM_DECODER(id, sample_fmt_, name, long_name_)

  541. 

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

  543. PCM_CODEC  (PCM_ALAW,         AV_SAMPLE_FMT_S16, pcm_alaw,         "PCM A-law / G.711 A-law");

  544. PCM_CODEC  (PCM_F32BE,        AV_SAMPLE_FMT_FLT, pcm_f32be,        "PCM 32-bit floating point big-endian");

  545. PCM_CODEC  (PCM_F32LE,        AV_SAMPLE_FMT_FLT, pcm_f32le,        "PCM 32-bit floating point little-endian");

  546. PCM_CODEC  (PCM_F64BE,        AV_SAMPLE_FMT_DBL, pcm_f64be,        "PCM 64-bit floating point big-endian");

  547. PCM_CODEC  (PCM_F64LE,        AV_SAMPLE_FMT_DBL, pcm_f64le,        "PCM 64-bit floating point little-endian");

  548. PCM_DECODER(PCM_LXF,          AV_SAMPLE_FMT_S32P,pcm_lxf,          "PCM signed 20-bit little-endian planar");

  549. PCM_CODEC  (PCM_MULAW,        AV_SAMPLE_FMT_S16, pcm_mulaw,        "PCM mu-law / G.711 mu-law");

  550. PCM_CODEC  (PCM_S8,           AV_SAMPLE_FMT_U8,  pcm_s8,           "PCM signed 8-bit");

  551. PCM_CODEC  (PCM_S8_PLANAR,    AV_SAMPLE_FMT_U8P, pcm_s8_planar,    "PCM signed 8-bit planar");

  552. PCM_CODEC  (PCM_S16BE,        AV_SAMPLE_FMT_S16, pcm_s16be,        "PCM signed 16-bit big-endian");

  553. PCM_CODEC  (PCM_S16BE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16be_planar, "PCM signed 16-bit big-endian planar");

  554. PCM_CODEC  (PCM_S16LE,        AV_SAMPLE_FMT_S16, pcm_s16le,        "PCM signed 16-bit little-endian");

  555. PCM_CODEC  (PCM_S16LE_PLANAR, AV_SAMPLE_FMT_S16P,pcm_s16le_planar, "PCM signed 16-bit little-endian planar");

  556. PCM_CODEC  (PCM_S24BE,        AV_SAMPLE_FMT_S32, pcm_s24be,        "PCM signed 24-bit big-endian");

  557. PCM_CODEC  (PCM_S24DAUD,      AV_SAMPLE_FMT_S16, pcm_s24daud,      "PCM D-Cinema audio signed 24-bit");

  558. PCM_CODEC  (PCM_S24LE,        AV_SAMPLE_FMT_S32, pcm_s24le,        "PCM signed 24-bit little-endian");

  559. PCM_CODEC  (PCM_S24LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s24le_planar, "PCM signed 24-bit little-endian planar");

  560. PCM_CODEC  (PCM_S32BE,        AV_SAMPLE_FMT_S32, pcm_s32be,        "PCM signed 32-bit big-endian");

  561. PCM_CODEC  (PCM_S32LE,        AV_SAMPLE_FMT_S32, pcm_s32le,        "PCM signed 32-bit little-endian");

  562. PCM_CODEC  (PCM_S32LE_PLANAR, AV_SAMPLE_FMT_S32P,pcm_s32le_planar, "PCM signed 32-bit little-endian planar");

  563. PCM_CODEC  (PCM_U8,           AV_SAMPLE_FMT_U8,  pcm_u8,           "PCM unsigned 8-bit");

  564. PCM_CODEC  (PCM_U16BE,        AV_SAMPLE_FMT_S16, pcm_u16be,        "PCM unsigned 16-bit big-endian");

  565. PCM_CODEC  (PCM_U16LE,        AV_SAMPLE_FMT_S16, pcm_u16le,        "PCM unsigned 16-bit little-endian");

  566. PCM_CODEC  (PCM_U24BE,        AV_SAMPLE_FMT_S32, pcm_u24be,        "PCM unsigned 24-bit big-endian");

  567. PCM_CODEC  (PCM_U24LE,        AV_SAMPLE_FMT_S32, pcm_u24le,        "PCM unsigned 24-bit little-endian");

  568. PCM_CODEC  (PCM_U32BE,        AV_SAMPLE_FMT_S32, pcm_u32be,        "PCM unsigned 32-bit big-endian");

  569. PCM_CODEC  (PCM_U32LE,        AV_SAMPLE_FMT_S32, pcm_u32le,        "PCM unsigned 32-bit little-endian");

  570. PCM_DECODER(PCM_ZORK,         AV_SAMPLE_FMT_U8,  pcm_zork,         "PCM Zork");