falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93030 Commits
32 Branches
380MB
Tree: a7dabc18ea
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from 'a7dabc18ea'
${ noResults }
FFmpeg/libavcodec/pcm.c

633 lines
24KB
Raw Blame History 

  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.     AVFloatDSPContext *fdsp;

  239.     float   scale;

  240. } PCMDecode;

  241. 

  242. static av_cold int pcm_decode_init(AVCodecContext *avctx)

  243. {

  244.     PCMDecode *s = avctx->priv_data;

  245.     int i;

  246. 

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

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

  249.         return AVERROR(EINVAL);

  250.     }

  251. 

  252.     switch (avctx->codec_id) {

  253.     case AV_CODEC_ID_PCM_ALAW:

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

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

  256.         break;

  257.     case AV_CODEC_ID_PCM_MULAW:

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

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

  260.         break;

  261.     case AV_CODEC_ID_PCM_VIDC:

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

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

  264.         break;

  265.     case AV_CODEC_ID_PCM_F16LE:

  266.     case AV_CODEC_ID_PCM_F24LE:

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

  268.             return AVERROR_INVALIDDATA;

  269. 

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

  271.         s->fdsp = avpriv_float_dsp_alloc(0);

  272.         if (!s->fdsp)

  273.             return AVERROR(ENOMEM);

  274.         break;

  275.     default:

  276.         break;

  277.     }

  278. 

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

  280. 

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

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

  283. 

  284.     return 0;

  285. }

  286. 

  287. static av_cold int pcm_decode_close(AVCodecContext *avctx)

  288. {

  289.     PCMDecode *s = avctx->priv_data;

  290. 

  291.     av_freep(&s->fdsp);

  292. 

  293.     return 0;

  294. }

  295. 

  296. /**

  297.  * Read PCM samples macro

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

  299.  * @param endian bytestream_get_xxx() endian suffix

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

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

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

  303.  * @param shift  Bitshift (bits)

  304.  * @param offset Sample value offset

  305.  */

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

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

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

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

  310.         dst += size / 8;                                                \

  311.     }

  312. 

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

  314.     n /= avctx->channels;                                               \

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

  316.         int i;                                                          \

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

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

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

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

  321.             dst += size / 8;                                            \

  322.         }                                                               \

  323.     }

  324. 

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

  326.                             int *got_frame_ptr, AVPacket *avpkt)

  327. {

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

  329.     int buf_size       = avpkt->size;

  330.     PCMDecode *s       = avctx->priv_data;

  331.     AVFrame *frame     = data;

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

  333.     uint8_t *samples;

  334.     int32_t *dst_int32_t;

  335. 

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

  337. 

  338.     /* av_get_bits_per_sample returns 0 for AV_CODEC_ID_PCM_DVD */

  339.     samples_per_block = 1;

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

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

  342.         samples_per_block = 2;

  343.         sample_size       = 5;

  344.     }

  345. 

  346.     if (sample_size == 0) {

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

  348.         return AVERROR(EINVAL);

  349.     }

  350. 

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

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

  353.         return AVERROR(EINVAL);

  354.     }

  355. 

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

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

  358.         return AVERROR(EINVAL);

  359.     }

  360. 

  361.     n = avctx->channels * sample_size;

  362. 

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

  364.         if (buf_size < n) {

  365.             av_log(avctx, AV_LOG_ERROR,

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

  367.                    buf_size, n);

  368.             return AVERROR_INVALIDDATA;

  369.         } else

  370.             buf_size -= buf_size % n;

  371.     }

  372. 

  373.     n = buf_size / sample_size;

  374. 

  375.     /* get output buffer */

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

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

  378.         return ret;

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

  380. 

  381.     switch (avctx->codec_id) {

  382.     case AV_CODEC_ID_PCM_U32LE:

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

  384.         break;

  385.     case AV_CODEC_ID_PCM_U32BE:

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

  387.         break;

  388.     case AV_CODEC_ID_PCM_S24LE:

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

  390.         break;

  391.     case AV_CODEC_ID_PCM_S24LE_PLANAR:

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

  393.         break;

  394.     case AV_CODEC_ID_PCM_S24BE:

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

  396.         break;

  397.     case AV_CODEC_ID_PCM_U24LE:

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

  399.         break;

  400.     case AV_CODEC_ID_PCM_U24BE:

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

  402.         break;

  403.     case AV_CODEC_ID_PCM_S24DAUD:

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

  405.             uint32_t v = bytestream_get_be24(&src);

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

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

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

  409.             samples += 2;

  410.         }

  411.         break;

  412.     case AV_CODEC_ID_PCM_U16LE:

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

  414.         break;

  415.     case AV_CODEC_ID_PCM_U16BE:

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

  417.         break;

  418.     case AV_CODEC_ID_PCM_S8:

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

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

  421.         break;

  422.     case AV_CODEC_ID_PCM_S8_PLANAR:

  423.         n /= avctx->channels;

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

  425.             int i;

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

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

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

  429.         }

  430.         break;

  431. #if HAVE_BIGENDIAN

  432.     case AV_CODEC_ID_PCM_S64LE:

  433.     case AV_CODEC_ID_PCM_F64LE:

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

  435.         break;

  436.     case AV_CODEC_ID_PCM_S32LE:

  437.     case AV_CODEC_ID_PCM_F32LE:

  438.     case AV_CODEC_ID_PCM_F24LE:

  439.     case AV_CODEC_ID_PCM_F16LE:

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

  441.         break;

  442.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

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

  444.         break;

  445.     case AV_CODEC_ID_PCM_S16LE:

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

  447.         break;

  448.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

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

  450.         break;

  451.     case AV_CODEC_ID_PCM_F64BE:

  452.     case AV_CODEC_ID_PCM_F32BE:

  453.     case AV_CODEC_ID_PCM_S64BE:

  454.     case AV_CODEC_ID_PCM_S32BE:

  455.     case AV_CODEC_ID_PCM_S16BE:

  456. #else

  457.     case AV_CODEC_ID_PCM_S64BE:

  458.     case AV_CODEC_ID_PCM_F64BE:

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

  460.         break;

  461.     case AV_CODEC_ID_PCM_F32BE:

  462.     case AV_CODEC_ID_PCM_S32BE:

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

  464.         break;

  465.     case AV_CODEC_ID_PCM_S16BE:

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

  467.         break;

  468.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

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

  470.         break;

  471.     case AV_CODEC_ID_PCM_F64LE:

  472.     case AV_CODEC_ID_PCM_F32LE:

  473.     case AV_CODEC_ID_PCM_F24LE:

  474.     case AV_CODEC_ID_PCM_F16LE:

  475.     case AV_CODEC_ID_PCM_S64LE:

  476.     case AV_CODEC_ID_PCM_S32LE:

  477.     case AV_CODEC_ID_PCM_S16LE:

  478. #endif /* HAVE_BIGENDIAN */

  479.     case AV_CODEC_ID_PCM_U8:

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

  481.         break;

  482. #if HAVE_BIGENDIAN

  483.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  484. #else

  485.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  486.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  487. #endif /* HAVE_BIGENDIAN */

  488.         n /= avctx->channels;

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

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

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

  492.         }

  493.         break;

  494.     case AV_CODEC_ID_PCM_ZORK:

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

  496.             int v = *src++;

  497.             if (v < 128)

  498.                 v = 128 - v;

  499.             *samples++ = v;

  500.         }

  501.         break;

  502.     case AV_CODEC_ID_PCM_ALAW:

  503.     case AV_CODEC_ID_PCM_MULAW:

  504.     case AV_CODEC_ID_PCM_VIDC:

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

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

  507.             samples += 2;

  508.         }

  509.         break;

  510.     case AV_CODEC_ID_PCM_LXF:

  511.     {

  512.         int i;

  513.         n /= avctx->channels;

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

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

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

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

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

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

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

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

  522.                                    src[1];

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

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

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

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

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

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

  529.                 src += 5;

  530.             }

  531.         }

  532.         break;

  533.     }

  534.     default:

  535.         return -1;

  536.     }

  537. 

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

  539.         avctx->codec_id == AV_CODEC_ID_PCM_F24LE) {

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

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

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

  543.         emms_c();

  544.     }

  545. 

  546.     *got_frame_ptr = 1;

  547. 

  548.     return buf_size;

  549. }

  550. 

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

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

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

  554.     .name         = #name_,                                                 \

  555.     .long_name    = NULL_IF_CONFIG_SMALL(long_name_),                       \

  556.     .type         = AVMEDIA_TYPE_AUDIO,                                     \

  557.     .id           = AV_CODEC_ID_ ## id_,                                    \

  558.     .init         = pcm_encode_init,                                        \

  559.     .encode2      = pcm_encode_frame,                                       \

  560.     .capabilities = AV_CODEC_CAP_VARIABLE_FRAME_SIZE,                       \

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

  562.                                                    AV_SAMPLE_FMT_NONE },    \

  563. }

  564. 

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

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

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

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

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

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

  571. 

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

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

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

  575.     .name           = #name_,                                               \

  576.     .long_name      = NULL_IF_CONFIG_SMALL(long_name_),                     \

  577.     .type           = AVMEDIA_TYPE_AUDIO,                                   \

  578.     .id             = AV_CODEC_ID_ ## id_,                                  \

  579.     .priv_data_size = sizeof(PCMDecode),                                    \

  580.     .init           = pcm_decode_init,                                      \

  581.     .close          = pcm_decode_close,                                     \

  582.     .decode         = pcm_decode_frame,                                     \

  583.     .capabilities   = AV_CODEC_CAP_DR1,                                     \

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

  585.                                                      AV_SAMPLE_FMT_NONE },  \

  586. }

  587. 

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

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

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

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

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

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

  594. 

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

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

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

  598. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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