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 "internal.h"
  24 #include "pcm.h"
  25 #include "libavutil/log.h"
  26 #include "libavutil/opt.h"
  27 #include "libavutil/avassert.h"
  28
  29 typedef struct PCMAudioDemuxerContext {
  30     AVClass *class;
  31     int sample_rate;
  32     int channels;
  33 } PCMAudioDemuxerContext;
  34
  35 static int pcm_read_header(AVFormatContext *s)
  36 {
  37     PCMAudioDemuxerContext *s1 = s->priv_data;
  38     AVStream *st;
  39
  40     st = avformat_new_stream(s, NULL);
  41     if (!st)
  42         return AVERROR(ENOMEM);
  43
  44
  45     st->codec->codec_type  = AVMEDIA_TYPE_AUDIO;
  46     st->codec->codec_id    = s->iformat->raw_codec_id;
  47     st->codec->sample_rate = s1->sample_rate;
  48     st->codec->channels    = s1->channels;
  49
  50     st->codec->bits_per_coded_sample =
  51         av_get_bits_per_sample(st->codec->codec_id);
  52
  53     av_assert0(st->codec->bits_per_coded_sample > 0);
  54
  55     st->codec->block_align =
  56         st->codec->bits_per_coded_sample * st->codec->channels / 8;
  57
  58     avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
  59     return 0;
  60 }
  61
  62 static const AVOption pcm_options[] = {
  63     { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
  64     { "channels",    "", offsetof(PCMAudioDemuxerContext, channels),    AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
  65     { NULL },
  66 };
  67
  68 #define PCMDEF(name_, long_name_, ext, codec)               \
  69 static const AVClass name_ ## _demuxer_class = {            \
  70     .class_name = #name_ " demuxer",                        \
  71     .item_name  = av_default_item_name,                     \
  72     .option     = pcm_options,                              \
  73     .version    = LIBAVUTIL_VERSION_INT,                    \
  74 };                                                          \
  75 AVInputFormat ff_pcm_ ## name_ ## _demuxer = {              \
  76     .name           = #name_,                               \
  77     .long_name      = NULL_IF_CONFIG_SMALL(long_name_),     \
  78     .priv_data_size = sizeof(PCMAudioDemuxerContext),       \
  79     .read_header    = pcm_read_header,                      \
  80     .read_packet    = ff_pcm_read_packet,                   \
  81     .read_seek      = ff_pcm_read_seek,                     \
  82     .flags          = AVFMT_GENERIC_INDEX,                  \
  83     .extensions     = ext,                                  \
  84     .raw_codec_id   = codec,                                \
  85     .priv_class     = &name_ ## _demuxer_class,             \
  86 };
  87
  88 PCMDEF(f64be, "PCM 64-bit floating-point big-endian",
  89        NULL, AV_CODEC_ID_PCM_F64BE)
  90
  91 PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
  92        NULL, AV_CODEC_ID_PCM_F64LE)
  93
  94 PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
  95        NULL, AV_CODEC_ID_PCM_F32BE)
  96
  97 PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
  98        NULL, AV_CODEC_ID_PCM_F32LE)
  99
 100 PCMDEF(s32be, "PCM signed 32-bit big-endian",
 101        NULL, AV_CODEC_ID_PCM_S32BE)
 102
 103 PCMDEF(s32le, "PCM signed 32-bit little-endian",
 104        NULL, AV_CODEC_ID_PCM_S32LE)
 105
 106 PCMDEF(s24be, "PCM signed 24-bit big-endian",
 107        NULL, AV_CODEC_ID_PCM_S24BE)
 108
 109 PCMDEF(s24le, "PCM signed 24-bit little-endian",
 110        NULL, AV_CODEC_ID_PCM_S24LE)
 111
 112 PCMDEF(s16be, "PCM signed 16-bit big-endian",
 113        AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE)
 114
 115 PCMDEF(s16le, "PCM signed 16-bit little-endian",
 116        AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE)
 117
 118 PCMDEF(s8, "PCM signed 8-bit",
 119        "sb", AV_CODEC_ID_PCM_S8)
 120
 121 PCMDEF(u32be, "PCM unsigned 32-bit big-endian",
 122        NULL, AV_CODEC_ID_PCM_U32BE)
 123
 124 PCMDEF(u32le, "PCM unsigned 32-bit little-endian",
 125        NULL, AV_CODEC_ID_PCM_U32LE)
 126
 127 PCMDEF(u24be, "PCM unsigned 24-bit big-endian",
 128        NULL, AV_CODEC_ID_PCM_U24BE)
 129
 130 PCMDEF(u24le, "PCM unsigned 24-bit little-endian",
 131        NULL, AV_CODEC_ID_PCM_U24LE)
 132
 133 PCMDEF(u16be, "PCM unsigned 16-bit big-endian",
 134        AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE)
 135
 136 PCMDEF(u16le, "PCM unsigned 16-bit little-endian",
 137        AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE)
 138
 139 PCMDEF(u8, "PCM unsigned 8-bit",
 140        "ub", AV_CODEC_ID_PCM_U8)
 141
 142 PCMDEF(alaw, "PCM A-law",
 143        "al", AV_CODEC_ID_PCM_ALAW)
 144
 145 PCMDEF(mulaw, "PCM mu-law",
 146        "ul", AV_CODEC_ID_PCM_MULAW)
 147
 148 static const AVOption sln_options[] = {
 149     { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 8000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
 150     { "channels",    "", offsetof(PCMAudioDemuxerContext, channels),    AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
 151     { NULL },
 152 };
 153
 154 static const AVClass sln_demuxer_class = {
 155     .class_name = "sln demuxer",
 156     .item_name  = av_default_item_name,
 157     .option     = sln_options,
 158     .version    = LIBAVUTIL_VERSION_INT,
 159 };
 160
 161 AVInputFormat ff_sln_demuxer = {
 162     .name           = "sln",
 163     .long_name      = NULL_IF_CONFIG_SMALL("Asterisk raw pcm"),
 164     .priv_data_size = sizeof(PCMAudioDemuxerContext),
 165     .read_header    = pcm_read_header,
 166     .read_packet    = ff_pcm_read_packet,
 167     .read_seek      = ff_pcm_read_seek,
 168     .flags          = AVFMT_GENERIC_INDEX,
 169     .extensions     = "sln",
 170     .raw_codec_id   = AV_CODEC_ID_PCM_S16LE,
 171     .priv_class     = &sln_demuxer_class,
 172 };