git.sesse.net Git - ffmpeg/blob - libavformat/pcmdec.c

   1 /*
   2  * RAW PCM demuxers
   3  * Copyright (c) 2002 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 #include "avformat.h"
  23 #include "rawdec.h"
  24 #include "pcm.h"
  25 #include "libavutil/log.h"
  26 #include "libavutil/opt.h"
  27
  28 #define RAW_SAMPLES     1024
  29
  30 static int raw_read_packet(AVFormatContext *s, AVPacket *pkt)
  31 {
  32     int ret, size, bps;
  33     //    AVStream *st = s->streams[0];
  34
  35     size= RAW_SAMPLES*s->streams[0]->codec->block_align;
  36
  37     ret= av_get_packet(s->pb, pkt, size);
  38
  39     pkt->stream_index = 0;
  40     if (ret < 0)
  41         return ret;
  42
  43     bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
  44     assert(bps); // if false there IS a bug elsewhere (NOT in this function)
  45     pkt->dts=
  46     pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
  47
  48     return ret;
  49 }
  50
  51 static const AVOption pcm_options[] = {
  52     { "sample_rate", "", offsetof(RawAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
  53     { "channels",    "", offsetof(RawAudioDemuxerContext, channels),    AV_OPT_TYPE_INT, {.dbl = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
  54     { NULL },
  55 };
  56
  57 #define PCMDEF(name_, long_name_, ext, codec)               \
  58 static const AVClass name_ ## _demuxer_class = {            \
  59     .class_name = #name_ " demuxer",                        \
  60     .item_name  = av_default_item_name,                     \
  61     .option     = pcm_options,                              \
  62     .version    = LIBAVUTIL_VERSION_INT,                    \
  63 };                                                          \
  64 AVInputFormat ff_pcm_ ## name_ ## _demuxer = {              \
  65     .name           = #name_,                               \
  66     .long_name      = NULL_IF_CONFIG_SMALL(long_name_),     \
  67     .priv_data_size = sizeof(RawAudioDemuxerContext),       \
  68     .read_header    = ff_raw_read_header,                   \
  69     .read_packet    = raw_read_packet,                      \
  70     .read_seek      = pcm_read_seek,                        \
  71     .flags          = AVFMT_GENERIC_INDEX,                  \
  72     .extensions     = ext,                                  \
  73     .value          = codec,                                \
  74     .priv_class     = &name_ ## _demuxer_class,             \
  75 };
  76
  77 PCMDEF(f64be, "PCM 64 bit floating-point big-endian format",
  78        NULL, CODEC_ID_PCM_F64BE)
  79
  80 PCMDEF(f64le, "PCM 64 bit floating-point little-endian format",
  81        NULL, CODEC_ID_PCM_F64LE)
  82
  83 PCMDEF(f32be, "PCM 32 bit floating-point big-endian format",
  84        NULL, CODEC_ID_PCM_F32BE)
  85
  86 PCMDEF(f32le, "PCM 32 bit floating-point little-endian format",
  87        NULL, CODEC_ID_PCM_F32LE)
  88
  89 PCMDEF(s32be, "PCM signed 32 bit big-endian format",
  90        NULL, CODEC_ID_PCM_S32BE)
  91
  92 PCMDEF(s32le, "PCM signed 32 bit little-endian format",
  93        NULL, CODEC_ID_PCM_S32LE)
  94
  95 PCMDEF(s24be, "PCM signed 24 bit big-endian format",
  96        NULL, CODEC_ID_PCM_S24BE)
  97
  98 PCMDEF(s24le, "PCM signed 24 bit little-endian format",
  99        NULL, CODEC_ID_PCM_S24LE)
 100
 101 PCMDEF(s16be, "PCM signed 16 bit big-endian format",
 102        AV_NE("sw", NULL), CODEC_ID_PCM_S16BE)
 103
 104 PCMDEF(s16le, "PCM signed 16 bit little-endian format",
 105        AV_NE(NULL, "sw"), CODEC_ID_PCM_S16LE)
 106
 107 PCMDEF(s8, "PCM signed 8 bit format",
 108        "sb", CODEC_ID_PCM_S8)
 109
 110 PCMDEF(u32be, "PCM unsigned 32 bit big-endian format",
 111        NULL, CODEC_ID_PCM_U32BE)
 112
 113 PCMDEF(u32le, "PCM unsigned 32 bit little-endian format",
 114        NULL, CODEC_ID_PCM_U32LE)
 115
 116 PCMDEF(u24be, "PCM unsigned 24 bit big-endian format",
 117        NULL, CODEC_ID_PCM_U24BE)
 118
 119 PCMDEF(u24le, "PCM unsigned 24 bit little-endian format",
 120        NULL, CODEC_ID_PCM_U24LE)
 121
 122 PCMDEF(u16be, "PCM unsigned 16 bit big-endian format",
 123        AV_NE("uw", NULL), CODEC_ID_PCM_U16BE)
 124
 125 PCMDEF(u16le, "PCM unsigned 16 bit little-endian format",
 126        AV_NE(NULL, "uw"), CODEC_ID_PCM_U16LE)
 127
 128 PCMDEF(u8, "PCM unsigned 8 bit format",
 129        "ub", CODEC_ID_PCM_U8)
 130
 131 PCMDEF(alaw, "PCM A-law format",
 132        "al", CODEC_ID_PCM_ALAW)
 133
 134 PCMDEF(mulaw, "PCM mu-law format",
 135        "ul", CODEC_ID_PCM_MULAW)