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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 "libavutil/float_dsp.h"

  29. #include "avcodec.h"

  30. #include "bytestream.h"

  31. #include "internal.h"

  32. #include "mathops.h"

  33. #include "pcm_tablegen.h"

  34. 

  35. static av_cold int pcm_encode_init(AVCodecContext *avctx)

  36. {

  37.     avctx->frame_size = 0;

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

  39.     case AV_CODEC_ID_PCM_ALAW:

  40.         pcm_alaw_tableinit();

  41.         break;

  42.     case AV_CODEC_ID_PCM_MULAW:

  43.         pcm_ulaw_tableinit();

  44.         break;

  45.     case AV_CODEC_ID_PCM_VIDC:

  46.         pcm_vidc_tableinit();

  47.         break;

  48.     default:

  49.         break;

  50.     }

  51. 

  52.     avctx->bits_per_coded_sample = av_get_bits_per_sample(avctx->codec->id);

  53.     avctx->block_align           = avctx->channels * avctx->bits_per_coded_sample / 8;

  54.     avctx->bit_rate              = avctx->block_align * 8LL * avctx->sample_rate;

  55. 

  56.     return 0;

  57. }

  58. 

  59. /**

  60.  * Write PCM samples macro

  61.  * @param type   Datatype of native machine format

  62.  * @param endian bytestream_put_xxx() suffix

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

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

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

  66.  * @param shift  Bitshift (bits)

  67.  * @param offset Sample value offset

  68.  */

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

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

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

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

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

  74.     }

  75. 

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

  77.     n /= avctx->channels;                                               \

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

  79.         int i;                                                          \

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

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

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

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

  84.         }                                                               \

  85.     }

  86. 

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

  88.                             const AVFrame *frame, int *got_packet_ptr)

  89. {

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

  91.     const short *samples;

  92.     unsigned char *dst;

  93.     const uint8_t *samples_uint8_t;

  94.     const int16_t *samples_int16_t;

  95.     const int32_t *samples_int32_t;

  96.     const int64_t *samples_int64_t;

  97.     const uint16_t *samples_uint16_t;

  98.     const uint32_t *samples_uint32_t;

  99. 

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

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

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

  103. 

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

  105.         return ret;

  106.     dst = avpkt->data;

  107. 

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

  109.     case AV_CODEC_ID_PCM_U32LE:

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

  111.         break;

  112.     case AV_CODEC_ID_PCM_U32BE:

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

  114.         break;

  115.     case AV_CODEC_ID_PCM_S24LE:

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

  117.         break;

  118.     case AV_CODEC_ID_PCM_S24LE_PLANAR:

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

  120.         break;

  121.     case AV_CODEC_ID_PCM_S24BE:

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

  123.         break;

  124.     case AV_CODEC_ID_PCM_U24LE:

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

  126.         break;

  127.     case AV_CODEC_ID_PCM_U24BE:

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

  129.         break;

  130.     case AV_CODEC_ID_PCM_S24DAUD:

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

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

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

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

  135.             bytestream_put_be24(&dst, tmp);

  136.             samples++;

  137.         }

  138.         break;

  139.     case AV_CODEC_ID_PCM_U16LE:

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

  141.         break;

  142.     case AV_CODEC_ID_PCM_U16BE:

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

  144.         break;

  145.     case AV_CODEC_ID_PCM_S8:

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

  147.         break;

  148.     case AV_CODEC_ID_PCM_S8_PLANAR:

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

  150.         break;

  151. #if HAVE_BIGENDIAN

  152.     case AV_CODEC_ID_PCM_S64LE:

  153.     case AV_CODEC_ID_PCM_F64LE:

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

  155.         break;

  156.     case AV_CODEC_ID_PCM_S32LE:

  157.     case AV_CODEC_ID_PCM_F32LE:

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

  159.         break;

  160.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

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

  162.         break;

  163.     case AV_CODEC_ID_PCM_S16LE:

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

  165.         break;

  166.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

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

  168.         break;

  169.     case AV_CODEC_ID_PCM_F64BE:

  170.     case AV_CODEC_ID_PCM_F32BE:

  171.     case AV_CODEC_ID_PCM_S64BE:

  172.     case AV_CODEC_ID_PCM_S32BE:

  173.     case AV_CODEC_ID_PCM_S16BE:

  174. #else

  175.     case AV_CODEC_ID_PCM_S64BE:

  176.     case AV_CODEC_ID_PCM_F64BE:

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

  178.         break;

  179.     case AV_CODEC_ID_PCM_F32BE:

  180.     case AV_CODEC_ID_PCM_S32BE:

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

  182.         break;

  183.     case AV_CODEC_ID_PCM_S16BE:

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

  185.         break;

  186.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

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

  188.         break;

  189.     case AV_CODEC_ID_PCM_F64LE:

  190.     case AV_CODEC_ID_PCM_F32LE:

  191.     case AV_CODEC_ID_PCM_S64LE:

  192.     case AV_CODEC_ID_PCM_S32LE:

  193.     case AV_CODEC_ID_PCM_S16LE:

  194. #endif /* HAVE_BIGENDIAN */

  195.     case AV_CODEC_ID_PCM_U8:

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

  197.         break;

  198. #if HAVE_BIGENDIAN

  199.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  200. #else

  201.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  202.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  203. #endif /* HAVE_BIGENDIAN */

  204.         n /= avctx->channels;

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

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

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

  208.         }

  209.         break;

  210.     case AV_CODEC_ID_PCM_ALAW:

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

  212.             v      = *samples++;

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

  214.         }

  215.         break;

  216.     case AV_CODEC_ID_PCM_MULAW:

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

  218.             v      = *samples++;

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

  220.         }

  221.         break;

  222.     case AV_CODEC_ID_PCM_VIDC:

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

  224.             v      = *samples++;

  225.             *dst++ = linear_to_vidc[(v + 32768) >> 2];

  226.         }

  227.         break;

  228.     default:

  229.         return -1;

  230.     }

  231. 

  232.     *got_packet_ptr = 1;

  233.     return 0;

  234. }

  235. 

  236. typedef struct PCMDecode {

  237.     short   table[256];

  238.     void (*vector_fmul_scalar)(float *dst, const float *src, float mul,

  239.                                int len);

  240.     float   scale;

  241. } PCMDecode;

  242. 

  243. static av_cold int pcm_decode_init(AVCodecContext *avctx)

  244. {

  245.     PCMDecode *s = avctx->priv_data;

  246.     AVFloatDSPContext *fdsp;

  247.     int i;

  248. 

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

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

  251.         return AVERROR(EINVAL);

  252.     }

  253. 

  254.     switch (avctx->codec_id) {

  255.     case AV_CODEC_ID_PCM_ALAW:

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

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

  258.         break;

  259.     case AV_CODEC_ID_PCM_MULAW:

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

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

  262.         break;

  263.     case AV_CODEC_ID_PCM_VIDC:

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

  265.             s->table[i] = vidc2linear(i);

  266.         break;

  267.     case AV_CODEC_ID_PCM_F16LE:

  268.     case AV_CODEC_ID_PCM_F24LE:

  269.         if (avctx->bits_per_coded_sample < 1 || avctx->bits_per_coded_sample > 24)

  270.             return AVERROR_INVALIDDATA;

  271. 

  272.         s->scale = 1. / (1 << (avctx->bits_per_coded_sample - 1));

  273.         fdsp = avpriv_float_dsp_alloc(0);

  274.         if (!fdsp)

  275.             return AVERROR(ENOMEM);

  276.         s->vector_fmul_scalar = fdsp->vector_fmul_scalar;

  277.         av_free(fdsp);

  278.         break;

  279.     default:

  280.         break;

  281.     }

  282. 

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

  284. 

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

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

  287. 

  288.     return 0;

  289. }

  290. 

  291. /**

  292.  * Read PCM samples macro

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

  294.  * @param endian bytestream_get_xxx() endian suffix

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

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

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

  298.  * @param shift  Bitshift (bits)

  299.  * @param offset Sample value offset

  300.  */

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

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

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

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

  305.         dst += size / 8;                                                       \

  306.     }

  307. 

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

  309.     n /= avctx->channels;                                                      \

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

  311.         int i;                                                                 \

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

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

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

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

  316.             dst += size / 8;                                                   \

  317.         }                                                                      \

  318.     }

  319. 

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

  321.                             int *got_frame_ptr, AVPacket *avpkt)

  322. {

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

  324.     int buf_size       = avpkt->size;

  325.     PCMDecode *s       = avctx->priv_data;

  326.     AVFrame *frame     = data;

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

  328.     uint8_t *samples;

  329.     int32_t *dst_int32_t;

  330. 

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

  332. 

  333.     /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */

  334.     samples_per_block = 1;

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

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

  337.         samples_per_block = 2;

  338.         sample_size       = 5;

  339.     }

  340. 

  341.     if (sample_size == 0) {

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

  343.         return AVERROR(EINVAL);

  344.     }

  345. 

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

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

  348.         return AVERROR(EINVAL);

  349.     }

  350. 

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

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

  353.         return AVERROR(EINVAL);

  354.     }

  355. 

  356.     n = avctx->channels * sample_size;

  357. 

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

  359.         if (buf_size < n) {

  360.             av_log(avctx, AV_LOG_ERROR,

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

  362.                    buf_size, n);

  363.             return AVERROR_INVALIDDATA;

  364.         } else

  365.             buf_size -= buf_size % n;

  366.     }

  367. 

  368.     n = buf_size / sample_size;

  369. 

  370.     /* get output buffer */

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

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

  373.         return ret;

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

  375. 

  376.     switch (avctx->codec_id) {

  377.     case AV_CODEC_ID_PCM_U32LE:

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

  379.         break;

  380.     case AV_CODEC_ID_PCM_U32BE:

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

  382.         break;

  383.     case AV_CODEC_ID_PCM_S24LE:

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

  385.         break;

  386.     case AV_CODEC_ID_PCM_S24LE_PLANAR:

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

  388.         break;

  389.     case AV_CODEC_ID_PCM_S24BE:

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

  391.         break;

  392.     case AV_CODEC_ID_PCM_U24LE:

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

  394.         break;

  395.     case AV_CODEC_ID_PCM_U24BE:

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

  397.         break;

  398.     case AV_CODEC_ID_PCM_S24DAUD:

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

  400.             uint32_t v = bytestream_get_be24(&src);

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

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

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

  404.             samples += 2;

  405.         }

  406.         break;

  407.     case AV_CODEC_ID_PCM_U16LE:

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

  409.         break;

  410.     case AV_CODEC_ID_PCM_U16BE:

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

  412.         break;

  413.     case AV_CODEC_ID_PCM_S8:

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

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

  416.         break;

  417.     case AV_CODEC_ID_PCM_S8_PLANAR:

  418.         n /= avctx->channels;

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

  420.             int i;

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

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

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

  424.         }

  425.         break;

  426. #if HAVE_BIGENDIAN

  427.     case AV_CODEC_ID_PCM_S64LE:

  428.     case AV_CODEC_ID_PCM_F64LE:

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

  430.         break;

  431.     case AV_CODEC_ID_PCM_S32LE:

  432.     case AV_CODEC_ID_PCM_F32LE:

  433.     case AV_CODEC_ID_PCM_F24LE:

  434.     case AV_CODEC_ID_PCM_F16LE:

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

  436.         break;

  437.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

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

  439.         break;

  440.     case AV_CODEC_ID_PCM_S16LE:

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

  442.         break;

  443.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

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

  445.         break;

  446.     case AV_CODEC_ID_PCM_F64BE:

  447.     case AV_CODEC_ID_PCM_F32BE:

  448.     case AV_CODEC_ID_PCM_S64BE:

  449.     case AV_CODEC_ID_PCM_S32BE:

  450.     case AV_CODEC_ID_PCM_S16BE:

  451. #else

  452.     case AV_CODEC_ID_PCM_S64BE:

  453.     case AV_CODEC_ID_PCM_F64BE:

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

  455.         break;

  456.     case AV_CODEC_ID_PCM_F32BE:

  457.     case AV_CODEC_ID_PCM_S32BE:

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

  459.         break;

  460.     case AV_CODEC_ID_PCM_S16BE:

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

  462.         break;

  463.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

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

  465.         break;

  466.     case AV_CODEC_ID_PCM_F64LE:

  467.     case AV_CODEC_ID_PCM_F32LE:

  468.     case AV_CODEC_ID_PCM_F24LE:

  469.     case AV_CODEC_ID_PCM_F16LE:

  470.     case AV_CODEC_ID_PCM_S64LE:

  471.     case AV_CODEC_ID_PCM_S32LE:

  472.     case AV_CODEC_ID_PCM_S16LE:

  473. #endif /* HAVE_BIGENDIAN */

  474.     case AV_CODEC_ID_PCM_U8:

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

  476.         break;

  477. #if HAVE_BIGENDIAN

  478.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  479. #else

  480.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  481.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  482. #endif /* HAVE_BIGENDIAN */

  483.         n /= avctx->channels;

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

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

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

  487.         }

  488.         break;

  489.     case AV_CODEC_ID_PCM_ALAW:

  490.     case AV_CODEC_ID_PCM_MULAW:

  491.     case AV_CODEC_ID_PCM_VIDC:

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

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

  494.             samples += 2;

  495.         }

  496.         break;

  497.     case AV_CODEC_ID_PCM_LXF:

  498.     {

  499.         int i;

  500.         n /= avctx->channels;

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

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

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

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

  505.                 *dst_int32_t++ =  ((uint32_t)src[2]<<28) |

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

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

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

  509.                                    src[1];

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

  511.                 *dst_int32_t++ =  ((uint32_t)src[4]<<24) |

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

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

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

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

  516.                 src += 5;

  517.             }

  518.         }

  519.         break;

  520.     }

  521.     default:

  522.         return -1;

  523.     }

  524. 

  525.     if (avctx->codec_id == AV_CODEC_ID_PCM_F16LE ||

  526.         avctx->codec_id == AV_CODEC_ID_PCM_F24LE) {

  527.         s->vector_fmul_scalar((float *)frame->extended_data[0],

  528.                               (const float *)frame->extended_data[0],

  529.                               s->scale, FFALIGN(frame->nb_samples * avctx->channels, 4));

  530.         emms_c();

  531.     }

  532. 

  533.     *got_frame_ptr = 1;

  534. 

  535.     return buf_size;

  536. }

  537. 

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

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

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

  541.     .name         = #name_,                                                 \

  542.     .long_name    = NULL_IF_CONFIG_SMALL(long_name_),                       \

  543.     .type         = AVMEDIA_TYPE_AUDIO,                                     \

  544.     .id           = AV_CODEC_ID_ ## id_,                                    \

  545.     .init         = pcm_encode_init,                                        \

  546.     .encode2      = pcm_encode_frame,                                       \

  547.     .capabilities = AV_CODEC_CAP_VARIABLE_FRAME_SIZE,                       \

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

  549.                                                    AV_SAMPLE_FMT_NONE },    \

  550. }

  551. 

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

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

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

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

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

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

  558. 

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

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

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

  562.     .name           = #name_,                                               \

  563.     .long_name      = NULL_IF_CONFIG_SMALL(long_name_),                     \

  564.     .type           = AVMEDIA_TYPE_AUDIO,                                   \

  565.     .id             = AV_CODEC_ID_ ## id_,                                  \

  566.     .priv_data_size = sizeof(PCMDecode),                                    \

  567.     .init           = pcm_decode_init,                                      \

  568.     .decode         = pcm_decode_frame,                                     \

  569.     .capabilities   = AV_CODEC_CAP_DR1,                                     \

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

  571.                                                      AV_SAMPLE_FMT_NONE },  \

  572. }

  573. 

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

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

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

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

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

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

  580. 

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

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

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

  584. 

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

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

  587. PCM_DECODER(PCM_F16LE,        AV_SAMPLE_FMT_FLT, pcm_f16le,        "PCM 16.8 floating point little-endian");

  588. PCM_DECODER(PCM_F24LE,        AV_SAMPLE_FMT_FLT, pcm_f24le,        "PCM 24.0 floating point little-endian");

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  615. PCM_CODEC  (PCM_S64BE,        AV_SAMPLE_FMT_S64, pcm_s64be,        "PCM signed 64-bit big-endian");

  616. PCM_CODEC  (PCM_S64LE,        AV_SAMPLE_FMT_S64, pcm_s64le,        "PCM signed 64-bit little-endian");

  617. PCM_CODEC  (PCM_VIDC,         AV_SAMPLE_FMT_S16, pcm_vidc,         "PCM Archimedes VIDC");