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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.     avctx->coded_frame           = avcodec_alloc_frame();

  52.     if (!avctx->coded_frame)

  53.         return AVERROR(ENOMEM);

  54. 

  55.     return 0;

  56. }

  57. 

  58. static av_cold int pcm_encode_close(AVCodecContext *avctx)

  59. {

  60.     av_freep(&avctx->coded_frame);

  61. 

  62.     return 0;

  63. }

  64. 

  65. /**

  66.  * Write PCM samples macro

  67.  * @param type   Datatype of native machine format

  68.  * @param endian bytestream_put_xxx() suffix

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

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

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

  72.  * @param shift  Bitshift (bits)

  73.  * @param offset Sample value offset

  74.  */

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

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

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

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

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

  80.     }

  81. 

  82. #define ENCODE_PLANAR(type, endian, dst, n, shift, offset)              \

  83.     n /= avctx->channels;                                               \

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

  85.         int i;                                                          \

  86.         samples_ ## type = (const type *) frame->extended_data[c];      \

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

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

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

  90.         }                                                               \

  91.     }

  92. 

  93. static int pcm_encode_frame(AVCodecContext *avctx, AVPacket *avpkt,

  94.                             const AVFrame *frame, int *got_packet_ptr)

  95. {

  96.     int n, c, sample_size, v, ret;

  97.     const short *samples;

  98.     unsigned char *dst;

  99.     const uint8_t *samples_uint8_t;

  100.     const int16_t *samples_int16_t;

  101.     const int32_t *samples_int32_t;

  102.     const int64_t *samples_int64_t;

  103.     const uint16_t *samples_uint16_t;

  104.     const uint32_t *samples_uint32_t;

  105. 

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

  107.     n           = frame->nb_samples * avctx->channels;

  108.     samples     = (const short *)frame->data[0];

  109. 

  110.     if ((ret = ff_alloc_packet2(avctx, avpkt, n * sample_size)) < 0)

  111.         return ret;

  112.     dst = avpkt->data;

  113. 

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

  115.     case AV_CODEC_ID_PCM_U32LE:

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

  117.         break;

  118.     case AV_CODEC_ID_PCM_U32BE:

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

  120.         break;

  121.     case AV_CODEC_ID_PCM_S24LE:

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

  123.         break;

  124.     case AV_CODEC_ID_PCM_S24LE_PLANAR:

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

  126.         break;

  127.     case AV_CODEC_ID_PCM_S24BE:

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

  129.         break;

  130.     case AV_CODEC_ID_PCM_U24LE:

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

  132.         break;

  133.     case AV_CODEC_ID_PCM_U24BE:

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

  135.         break;

  136.     case AV_CODEC_ID_PCM_S24DAUD:

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

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

  139.                            (ff_reverse[*samples & 0xff] << 8);

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

  141.             bytestream_put_be24(&dst, tmp);

  142.             samples++;

  143.         }

  144.         break;

  145.     case AV_CODEC_ID_PCM_U16LE:

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

  147.         break;

  148.     case AV_CODEC_ID_PCM_U16BE:

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

  150.         break;

  151.     case AV_CODEC_ID_PCM_S8:

  152.         ENCODE(uint8_t, byte, samples, dst, n, 0, -128)

  153.         break;

  154.     case AV_CODEC_ID_PCM_S8_PLANAR:

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

  156.         break;

  157. #if HAVE_BIGENDIAN

  158.     case AV_CODEC_ID_PCM_F64LE:

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

  160.         break;

  161.     case AV_CODEC_ID_PCM_S32LE:

  162.     case AV_CODEC_ID_PCM_F32LE:

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

  164.         break;

  165.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

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

  167.         break;

  168.     case AV_CODEC_ID_PCM_S16LE:

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

  170.         break;

  171.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

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

  173.         break;

  174.     case AV_CODEC_ID_PCM_F64BE:

  175.     case AV_CODEC_ID_PCM_F32BE:

  176.     case AV_CODEC_ID_PCM_S32BE:

  177.     case AV_CODEC_ID_PCM_S16BE:

  178. #else

  179.     case AV_CODEC_ID_PCM_F64BE:

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

  181.         break;

  182.     case AV_CODEC_ID_PCM_F32BE:

  183.     case AV_CODEC_ID_PCM_S32BE:

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

  185.         break;

  186.     case AV_CODEC_ID_PCM_S16BE:

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

  188.         break;

  189.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

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

  191.         break;

  192.     case AV_CODEC_ID_PCM_F64LE:

  193.     case AV_CODEC_ID_PCM_F32LE:

  194.     case AV_CODEC_ID_PCM_S32LE:

  195.     case AV_CODEC_ID_PCM_S16LE:

  196. #endif /* HAVE_BIGENDIAN */

  197.     case AV_CODEC_ID_PCM_U8:

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

  199.         break;

  200. #if HAVE_BIGENDIAN

  201.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  202. #else

  203.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  204.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  205. #endif /* HAVE_BIGENDIAN */

  206.         n /= avctx->channels;

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

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

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

  210.         }

  211.         break;

  212.     case AV_CODEC_ID_PCM_ALAW:

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

  214.             v      = *samples++;

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

  216.         }

  217.         break;

  218.     case AV_CODEC_ID_PCM_MULAW:

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

  220.             v      = *samples++;

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

  222.         }

  223.         break;

  224.     default:

  225.         return -1;

  226.     }

  227. 

  228.     *got_packet_ptr = 1;

  229.     return 0;

  230. }

  231. 

  232. typedef struct PCMDecode {

  233.     short   table[256];

  234. } PCMDecode;

  235. 

  236. static av_cold int pcm_decode_init(AVCodecContext *avctx)

  237. {

  238.     PCMDecode *s = avctx->priv_data;

  239.     int i;

  240. 

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

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

  243.         return AVERROR(EINVAL);

  244.     }

  245. 

  246.     switch (avctx->codec_id) {

  247.     case AV_CODEC_ID_PCM_ALAW:

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

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

  250.         break;

  251.     case AV_CODEC_ID_PCM_MULAW:

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

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

  254.         break;

  255.     default:

  256.         break;

  257.     }

  258. 

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

  260. 

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

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

  263. 

  264.     return 0;

  265. }

  266. 

  267. /**

  268.  * Read PCM samples macro

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

  270.  * @param endian bytestream_get_xxx() endian suffix

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

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

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

  274.  * @param shift  Bitshift (bits)

  275.  * @param offset Sample value offset

  276.  */

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

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

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

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

  281.         dst += size / 8;                                                \

  282.     }

  283. 

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

  285.     n /= avctx->channels;                                               \

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

  287.         int i;                                                          \

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

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

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

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

  292.             dst += size / 8;                                            \

  293.         }                                                               \

  294.     }

  295. 

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

  297.                             int *got_frame_ptr, AVPacket *avpkt)

  298. {

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

  300.     int buf_size       = avpkt->size;

  301.     PCMDecode *s       = avctx->priv_data;

  302.     AVFrame *frame     = data;

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

  304.     uint8_t *samples;

  305.     int32_t *dst_int32_t;

  306. 

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

  308. 

  309.     /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */

  310.     samples_per_block = 1;

  311.     if (AV_CODEC_ID_PCM_DVD == avctx->codec_id) {

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

  313.             avctx->bits_per_coded_sample != 24) {

  314.             av_log(avctx, AV_LOG_ERROR,

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

  316.                    avctx->bits_per_coded_sample);

  317.             return AVERROR(EINVAL);

  318.         }

  319.         /* 2 samples are interleaved per block in PCM_DVD */

  320.         samples_per_block = 2;

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

  322.     } else if (avctx->codec_id == AV_CODEC_ID_PCM_LXF) {

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

  324.         samples_per_block = 2;

  325.         sample_size       = 5;

  326.     }

  327. 

  328.     if (sample_size == 0) {

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

  330.         return AVERROR(EINVAL);

  331.     }

  332. 

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

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

  335.         return AVERROR(EINVAL);

  336.     }

  337. 

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

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

  340.         return AVERROR(EINVAL);

  341.     }

  342. 

  343.     n = avctx->channels * sample_size;

  344. 

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

  346.         if (buf_size < n) {

  347.             av_log(avctx, AV_LOG_ERROR,

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

  349.                    buf_size, n);

  350.             return AVERROR_INVALIDDATA;

  351.         } else

  352.             buf_size -= buf_size % n;

  353.     }

  354. 

  355.     n = buf_size / sample_size;

  356. 

  357.     /* get output buffer */

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

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

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

  361.         return ret;

  362.     }

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

  364. 

  365.     switch (avctx->codec_id) {

  366.     case AV_CODEC_ID_PCM_U32LE:

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

  368.         break;

  369.     case AV_CODEC_ID_PCM_U32BE:

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

  371.         break;

  372.     case AV_CODEC_ID_PCM_S24LE:

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

  374.         break;

  375.     case AV_CODEC_ID_PCM_S24LE_PLANAR:

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

  377.         break;

  378.     case AV_CODEC_ID_PCM_S24BE:

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

  380.         break;

  381.     case AV_CODEC_ID_PCM_U24LE:

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

  383.         break;

  384.     case AV_CODEC_ID_PCM_U24BE:

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

  386.         break;

  387.     case AV_CODEC_ID_PCM_S24DAUD:

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

  389.             uint32_t v = bytestream_get_be24(&src);

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

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

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

  393.             samples += 2;

  394.         }

  395.         break;

  396.     case AV_CODEC_ID_PCM_U16LE:

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

  398.         break;

  399.     case AV_CODEC_ID_PCM_U16BE:

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

  401.         break;

  402.     case AV_CODEC_ID_PCM_S8:

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

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

  405.         break;

  406.     case AV_CODEC_ID_PCM_S8_PLANAR:

  407.         n /= avctx->channels;

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

  409.             int i;

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

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

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

  413.         }

  414.         break;

  415. #if HAVE_BIGENDIAN

  416.     case AV_CODEC_ID_PCM_F64LE:

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

  418.         break;

  419.     case AV_CODEC_ID_PCM_S32LE:

  420.     case AV_CODEC_ID_PCM_F32LE:

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

  422.         break;

  423.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

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

  425.         break;

  426.     case AV_CODEC_ID_PCM_S16LE:

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

  428.         break;

  429.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

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

  431.         break;

  432.     case AV_CODEC_ID_PCM_F64BE:

  433.     case AV_CODEC_ID_PCM_F32BE:

  434.     case AV_CODEC_ID_PCM_S32BE:

  435.     case AV_CODEC_ID_PCM_S16BE:

  436. #else

  437.     case AV_CODEC_ID_PCM_F64BE:

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

  439.         break;

  440.     case AV_CODEC_ID_PCM_F32BE:

  441.     case AV_CODEC_ID_PCM_S32BE:

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

  443.         break;

  444.     case AV_CODEC_ID_PCM_S16BE:

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

  446.         break;

  447.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

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

  449.         break;

  450.     case AV_CODEC_ID_PCM_F64LE:

  451.     case AV_CODEC_ID_PCM_F32LE:

  452.     case AV_CODEC_ID_PCM_S32LE:

  453.     case AV_CODEC_ID_PCM_S16LE:

  454. #endif /* HAVE_BIGENDIAN */

  455.     case AV_CODEC_ID_PCM_U8:

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

  457.         break;

  458. #if HAVE_BIGENDIAN

  459.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  460. #else

  461.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  462.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  463. #endif /* HAVE_BIGENDIAN */

  464.         n /= avctx->channels;

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

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

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

  468.         }

  469.         break;

  470.     case AV_CODEC_ID_PCM_ZORK:

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

  472.             int v = *src++;

  473.             if (v < 128)

  474.                 v = 128 - v;

  475.             *samples++ = v;

  476.         }

  477.         break;

  478.     case AV_CODEC_ID_PCM_ALAW:

  479.     case AV_CODEC_ID_PCM_MULAW:

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

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

  482.             samples += 2;

  483.         }

  484.         break;

  485.     case AV_CODEC_ID_PCM_DVD:

  486.     {

  487.         const uint8_t *src8;

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

  489.         n /= avctx->channels;

  490.         switch (avctx->bits_per_coded_sample) {

  491.         case 20:

  492.             while (n--) {

  493.                 c    = avctx->channels;

  494.                 src8 = src + 4 * c;

  495.                 while (c--) {

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

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

  498.                 }

  499.                 src = src8;

  500.             }

  501.             break;

  502.         case 24:

  503.             while (n--) {

  504.                 c    = avctx->channels;

  505.                 src8 = src + 4 * c;

  506.                 while (c--) {

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

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

  509.                 }

  510.                 src = src8;

  511.             }

  512.             break;

  513.         }

  514.         break;

  515.     }

  516.     case AV_CODEC_ID_PCM_LXF:

  517.     {

  518.         int i;

  519.         n /= avctx->channels;

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

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

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

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

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

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

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

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

  528.                                    src[1];

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

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

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

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

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

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

  535.                 src += 5;

  536.             }

  537.         }

  538.         break;

  539.     }

  540.     default:

  541.         return -1;

  542.     }

  543. 

  544.     *got_frame_ptr = 1;

  545. 

  546.     return buf_size;

  547. }

  548. 

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

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

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

  552.     .name         = #name_,                                                 \

  553.     .type         = AVMEDIA_TYPE_AUDIO,                                     \

  554.     .id           = AV_CODEC_ID_ ## id_,                                    \

  555.     .init         = pcm_encode_init,                                        \

  556.     .encode2      = pcm_encode_frame,                                       \

  557.     .close        = pcm_encode_close,                                       \

  558.     .capabilities = CODEC_CAP_VARIABLE_FRAME_SIZE,                          \

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

  560.                                                    AV_SAMPLE_FMT_NONE },    \

  561.     .long_name    = NULL_IF_CONFIG_SMALL(long_name_),                       \

  562. }

  563. 

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

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

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

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

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

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

  570. 

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

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

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

  574.     .name           = #name_,                                               \

  575.     .type           = AVMEDIA_TYPE_AUDIO,                                   \

  576.     .id             = AV_CODEC_ID_ ## id_,                                  \

  577.     .priv_data_size = sizeof(PCMDecode),                                    \

  578.     .init           = pcm_decode_init,                                      \

  579.     .decode         = pcm_decode_frame,                                     \

  580.     .capabilities   = CODEC_CAP_DR1,                                        \

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

  582.                                                      AV_SAMPLE_FMT_NONE },  \

  583.     .long_name      = NULL_IF_CONFIG_SMALL(long_name_),                     \

  584. }

  585. 

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

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

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

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

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

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

  592. 

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

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

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

  596. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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