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.
101354 Commits
32 Branches
2.3GB
Tree: 5111707df6
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '5111707df6'
${ noResults }
FFmpeg/libavcodec/pcm.c

634 lines
25KB
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 "config.h"

  28. #include "libavutil/attributes.h"

  29. #include "libavutil/float_dsp.h"

  30. #include "libavutil/thread.h"

  31. #include "avcodec.h"

  32. #include "bytestream.h"

  33. #include "internal.h"

  34. #include "mathops.h"

  35. #include "pcm_tablegen.h"

  36. 

  37. static av_cold int pcm_encode_init(AVCodecContext *avctx)

  38. {

  39.     avctx->frame_size = 0;

  40. #if !CONFIG_HARDCODED_TABLES

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

  42. #define INIT_ONCE(id, name)                                                 \

  43.     case AV_CODEC_ID_PCM_ ## id:                                            \

  44.         if (CONFIG_PCM_ ## id ## _ENCODER) {                                \

  45.             static AVOnce init_static_once = AV_ONCE_INIT;                  \

  46.             ff_thread_once(&init_static_once, pcm_ ## name ## _tableinit);  \

  47.         }                                                                   \

  48.         break

  49.         INIT_ONCE(ALAW,  alaw);

  50.         INIT_ONCE(MULAW, ulaw);

  51.         INIT_ONCE(VIDC,  vidc);

  52.     default:

  53.         break;

  54.     }

  55. #endif

  56. 

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

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

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

  60. 

  61.     return 0;

  62. }

  63. 

  64. /**

  65.  * Write PCM samples macro

  66.  * @param type   Datatype of native machine format

  67.  * @param endian bytestream_put_xxx() suffix

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

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

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

  71.  * @param shift  Bitshift (bits)

  72.  * @param offset Sample value offset

  73.  */

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

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

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

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

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

  79.     }

  80. 

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

  82.     n /= avctx->channels;                                               \

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

  84.         int i;                                                          \

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

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

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

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

  89.         }                                                               \

  90.     }

  91. 

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

  93.                             const AVFrame *frame, int *got_packet_ptr)

  94. {

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

  96.     const short *samples;

  97.     unsigned char *dst;

  98.     const uint8_t *samples_uint8_t;

  99.     const int16_t *samples_int16_t;

  100.     const int32_t *samples_int32_t;

  101.     const int64_t *samples_int64_t;

  102.     const uint16_t *samples_uint16_t;

  103.     const uint32_t *samples_uint32_t;

  104. 

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

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

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

  108. 

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

  110.         return ret;

  111.     dst = avpkt->data;

  112. 

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

  114.     case AV_CODEC_ID_PCM_U32LE:

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

  116.         break;

  117.     case AV_CODEC_ID_PCM_U32BE:

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

  119.         break;

  120.     case AV_CODEC_ID_PCM_S24LE:

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

  122.         break;

  123.     case AV_CODEC_ID_PCM_S24LE_PLANAR:

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

  125.         break;

  126.     case AV_CODEC_ID_PCM_S24BE:

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

  128.         break;

  129.     case AV_CODEC_ID_PCM_U24LE:

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

  131.         break;

  132.     case AV_CODEC_ID_PCM_U24BE:

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

  134.         break;

  135.     case AV_CODEC_ID_PCM_S24DAUD:

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

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

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

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

  140.             bytestream_put_be24(&dst, tmp);

  141.             samples++;

  142.         }

  143.         break;

  144.     case AV_CODEC_ID_PCM_U16LE:

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

  146.         break;

  147.     case AV_CODEC_ID_PCM_U16BE:

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

  149.         break;

  150.     case AV_CODEC_ID_PCM_S8:

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

  152.         break;

  153.     case AV_CODEC_ID_PCM_S8_PLANAR:

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

  155.         break;

  156. #if HAVE_BIGENDIAN

  157.     case AV_CODEC_ID_PCM_S64LE:

  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_S64BE:

  177.     case AV_CODEC_ID_PCM_S32BE:

  178.     case AV_CODEC_ID_PCM_S16BE:

  179. #else

  180.     case AV_CODEC_ID_PCM_S64BE:

  181.     case AV_CODEC_ID_PCM_F64BE:

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

  183.         break;

  184.     case AV_CODEC_ID_PCM_F32BE:

  185.     case AV_CODEC_ID_PCM_S32BE:

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

  187.         break;

  188.     case AV_CODEC_ID_PCM_S16BE:

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

  190.         break;

  191.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

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

  193.         break;

  194.     case AV_CODEC_ID_PCM_F64LE:

  195.     case AV_CODEC_ID_PCM_F32LE:

  196.     case AV_CODEC_ID_PCM_S64LE:

  197.     case AV_CODEC_ID_PCM_S32LE:

  198.     case AV_CODEC_ID_PCM_S16LE:

  199. #endif /* HAVE_BIGENDIAN */

  200.     case AV_CODEC_ID_PCM_U8:

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

  202.         break;

  203. #if HAVE_BIGENDIAN

  204.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  205. #else

  206.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  207.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  208. #endif /* HAVE_BIGENDIAN */

  209.         n /= avctx->channels;

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

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

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

  213.         }

  214.         break;

  215.     case AV_CODEC_ID_PCM_ALAW:

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

  217.             v      = *samples++;

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

  219.         }

  220.         break;

  221.     case AV_CODEC_ID_PCM_MULAW:

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

  223.             v      = *samples++;

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

  225.         }

  226.         break;

  227.     case AV_CODEC_ID_PCM_VIDC:

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

  229.             v      = *samples++;

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

  231.         }

  232.         break;

  233.     default:

  234.         return -1;

  235.     }

  236. 

  237.     *got_packet_ptr = 1;

  238.     return 0;

  239. }

  240. 

  241. typedef struct PCMDecode {

  242.     short   table[256];

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

  244.                                int len);

  245.     float   scale;

  246. } PCMDecode;

  247. 

  248. static av_cold int pcm_decode_init(AVCodecContext *avctx)

  249. {

  250.     PCMDecode *s = avctx->priv_data;

  251.     AVFloatDSPContext *fdsp;

  252.     int i;

  253. 

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

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

  256.         return AVERROR(EINVAL);

  257.     }

  258. 

  259.     switch (avctx->codec_id) {

  260.     case AV_CODEC_ID_PCM_ALAW:

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

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

  263.         break;

  264.     case AV_CODEC_ID_PCM_MULAW:

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

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

  267.         break;

  268.     case AV_CODEC_ID_PCM_VIDC:

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

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

  271.         break;

  272.     case AV_CODEC_ID_PCM_F16LE:

  273.     case AV_CODEC_ID_PCM_F24LE:

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

  275.             return AVERROR_INVALIDDATA;

  276. 

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

  278.         fdsp = avpriv_float_dsp_alloc(0);

  279.         if (!fdsp)

  280.             return AVERROR(ENOMEM);

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

  282.         av_free(fdsp);

  283.         break;

  284.     default:

  285.         break;

  286.     }

  287. 

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

  289. 

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

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

  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_SGA:

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

  424.             int sign = *src >> 7;

  425.             int magn = *src & 0x7f;

  426.             *samples++ = sign ? 128 - magn : 128 + magn;

  427.             src++;

  428.         }

  429.         break;

  430.     case AV_CODEC_ID_PCM_S8_PLANAR:

  431.         n /= avctx->channels;

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

  433.             int i;

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

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

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

  437.         }

  438.         break;

  439. #if HAVE_BIGENDIAN

  440.     case AV_CODEC_ID_PCM_S64LE:

  441.     case AV_CODEC_ID_PCM_F64LE:

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

  443.         break;

  444.     case AV_CODEC_ID_PCM_S32LE:

  445.     case AV_CODEC_ID_PCM_F32LE:

  446.     case AV_CODEC_ID_PCM_F24LE:

  447.     case AV_CODEC_ID_PCM_F16LE:

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

  449.         break;

  450.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

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

  452.         break;

  453.     case AV_CODEC_ID_PCM_S16LE:

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

  455.         break;

  456.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

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

  458.         break;

  459.     case AV_CODEC_ID_PCM_F64BE:

  460.     case AV_CODEC_ID_PCM_F32BE:

  461.     case AV_CODEC_ID_PCM_S64BE:

  462.     case AV_CODEC_ID_PCM_S32BE:

  463.     case AV_CODEC_ID_PCM_S16BE:

  464. #else

  465.     case AV_CODEC_ID_PCM_S64BE:

  466.     case AV_CODEC_ID_PCM_F64BE:

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

  468.         break;

  469.     case AV_CODEC_ID_PCM_F32BE:

  470.     case AV_CODEC_ID_PCM_S32BE:

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

  472.         break;

  473.     case AV_CODEC_ID_PCM_S16BE:

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

  475.         break;

  476.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

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

  478.         break;

  479.     case AV_CODEC_ID_PCM_F64LE:

  480.     case AV_CODEC_ID_PCM_F32LE:

  481.     case AV_CODEC_ID_PCM_F24LE:

  482.     case AV_CODEC_ID_PCM_F16LE:

  483.     case AV_CODEC_ID_PCM_S64LE:

  484.     case AV_CODEC_ID_PCM_S32LE:

  485.     case AV_CODEC_ID_PCM_S16LE:

  486. #endif /* HAVE_BIGENDIAN */

  487.     case AV_CODEC_ID_PCM_U8:

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

  489.         break;

  490. #if HAVE_BIGENDIAN

  491.     case AV_CODEC_ID_PCM_S16BE_PLANAR:

  492. #else

  493.     case AV_CODEC_ID_PCM_S16LE_PLANAR:

  494.     case AV_CODEC_ID_PCM_S32LE_PLANAR:

  495. #endif /* HAVE_BIGENDIAN */

  496.         n /= avctx->channels;

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

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

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

  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->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.     .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,                          \

  564. }

  565. 

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

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

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

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

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

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

  572. 

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

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

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

  576.     .name           = #name_,                                               \

  577.     .long_name      = NULL_IF_CONFIG_SMALL(long_name_),                     \

  578.     .type           = AVMEDIA_TYPE_AUDIO,                                   \

  579.     .id             = AV_CODEC_ID_ ## id_,                                  \

  580.     .priv_data_size = sizeof(PCMDecode),                                    \

  581.     .init           = pcm_decode_init,                                      \

  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.     .caps_internal  = FF_CODEC_CAP_INIT_THREADSAFE,                         \

  587. }

  588. 

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

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

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

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

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

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

  595. 

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

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

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

  599. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  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");

  633. PCM_DECODER(PCM_SGA,          AV_SAMPLE_FMT_U8,  pcm_sga,          "PCM SGA");