3 * Copyright (c) 2002 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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.
12 * Libav 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.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25 #include "libavutil/log.h"
26 #include "libavutil/opt.h"
28 #define RAW_SAMPLES 1024
30 typedef struct PCMAudioDemuxerContext {
34 } PCMAudioDemuxerContext;
36 static int pcm_read_header(AVFormatContext *s)
38 PCMAudioDemuxerContext *s1 = s->priv_data;
41 st = avformat_new_stream(s, NULL);
43 return AVERROR(ENOMEM);
46 st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
47 st->codecpar->codec_id = s->iformat->raw_codec_id;
48 st->codecpar->sample_rate = s1->sample_rate;
49 st->codecpar->channels = s1->channels;
51 st->codecpar->bits_per_coded_sample =
52 av_get_bits_per_sample(st->codecpar->codec_id);
54 assert(st->codecpar->bits_per_coded_sample > 0);
56 st->codecpar->block_align =
57 st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8;
59 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
63 static int pcm_read_packet(AVFormatContext *s, AVPacket *pkt)
66 // AVStream *st = s->streams[0];
68 size= RAW_SAMPLES*s->streams[0]->codecpar->block_align;
70 ret= av_get_packet(s->pb, pkt, size);
72 pkt->stream_index = 0;
76 bps= av_get_bits_per_sample(s->streams[0]->codecpar->codec_id);
78 av_log(s, AV_LOG_ERROR, "Unknown number of bytes per sample.\n");
79 return AVERROR(EINVAL);
83 pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codecpar->channels);
88 static const AVOption pcm_options[] = {
89 { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
90 { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
94 #define PCMDEF(name_, long_name_, ext, codec) \
95 static const AVClass name_ ## _demuxer_class = { \
96 .class_name = #name_ " demuxer", \
97 .item_name = av_default_item_name, \
98 .option = pcm_options, \
99 .version = LIBAVUTIL_VERSION_INT, \
101 AVInputFormat ff_pcm_ ## name_ ## _demuxer = { \
103 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
104 .priv_data_size = sizeof(PCMAudioDemuxerContext), \
105 .read_header = pcm_read_header, \
106 .read_packet = pcm_read_packet, \
107 .read_seek = ff_pcm_read_seek, \
108 .flags = AVFMT_GENERIC_INDEX, \
110 .raw_codec_id = codec, \
111 .priv_class = &name_ ## _demuxer_class, \
114 PCMDEF(f64be, "PCM 64-bit floating-point big-endian",
115 NULL, AV_CODEC_ID_PCM_F64BE)
117 PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
118 NULL, AV_CODEC_ID_PCM_F64LE)
120 PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
121 NULL, AV_CODEC_ID_PCM_F32BE)
123 PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
124 NULL, AV_CODEC_ID_PCM_F32LE)
126 PCMDEF(s32be, "PCM signed 32-bit big-endian",
127 NULL, AV_CODEC_ID_PCM_S32BE)
129 PCMDEF(s32le, "PCM signed 32-bit little-endian",
130 NULL, AV_CODEC_ID_PCM_S32LE)
132 PCMDEF(s24be, "PCM signed 24-bit big-endian",
133 NULL, AV_CODEC_ID_PCM_S24BE)
135 PCMDEF(s24le, "PCM signed 24-bit little-endian",
136 NULL, AV_CODEC_ID_PCM_S24LE)
138 PCMDEF(s16be, "PCM signed 16-bit big-endian",
139 AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE)
141 PCMDEF(s16le, "PCM signed 16-bit little-endian",
142 AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE)
144 PCMDEF(s8, "PCM signed 8-bit",
145 "sb", AV_CODEC_ID_PCM_S8)
147 PCMDEF(u32be, "PCM unsigned 32-bit big-endian",
148 NULL, AV_CODEC_ID_PCM_U32BE)
150 PCMDEF(u32le, "PCM unsigned 32-bit little-endian",
151 NULL, AV_CODEC_ID_PCM_U32LE)
153 PCMDEF(u24be, "PCM unsigned 24-bit big-endian",
154 NULL, AV_CODEC_ID_PCM_U24BE)
156 PCMDEF(u24le, "PCM unsigned 24-bit little-endian",
157 NULL, AV_CODEC_ID_PCM_U24LE)
159 PCMDEF(u16be, "PCM unsigned 16-bit big-endian",
160 AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE)
162 PCMDEF(u16le, "PCM unsigned 16-bit little-endian",
163 AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE)
165 PCMDEF(u8, "PCM unsigned 8-bit",
166 "ub", AV_CODEC_ID_PCM_U8)
168 PCMDEF(alaw, "PCM A-law",
169 "al", AV_CODEC_ID_PCM_ALAW)
171 PCMDEF(mulaw, "PCM mu-law",
172 "ul", AV_CODEC_ID_PCM_MULAW)