3 * Copyright (c) 2002 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
25 #include "libavutil/log.h"
26 #include "libavutil/opt.h"
27 #include "libavutil/avassert.h"
29 #define RAW_SAMPLES 1024
31 typedef struct PCMAudioDemuxerContext {
35 } PCMAudioDemuxerContext;
37 static int pcm_read_header(AVFormatContext *s)
39 PCMAudioDemuxerContext *s1 = s->priv_data;
42 st = avformat_new_stream(s, NULL);
44 return AVERROR(ENOMEM);
47 st->codec->codec_type = AVMEDIA_TYPE_AUDIO;
48 st->codec->codec_id = s->iformat->raw_codec_id;
49 st->codec->sample_rate = s1->sample_rate;
50 st->codec->channels = s1->channels;
52 st->codec->bits_per_coded_sample =
53 av_get_bits_per_sample(st->codec->codec_id);
55 av_assert0(st->codec->bits_per_coded_sample > 0);
57 st->codec->block_align =
58 st->codec->bits_per_coded_sample * st->codec->channels / 8;
60 avpriv_set_pts_info(st, 64, 1, st->codec->sample_rate);
64 static int pcm_read_packet(AVFormatContext *s, AVPacket *pkt)
67 // AVStream *st = s->streams[0];
69 size= RAW_SAMPLES*s->streams[0]->codec->block_align;
71 ret= av_get_packet(s->pb, pkt, size);
73 pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
74 pkt->stream_index = 0;
78 bps= av_get_bits_per_sample(s->streams[0]->codec->codec_id);
79 av_assert1(bps); // if false there IS a bug elsewhere (NOT in this function)
81 pkt->pts= pkt->pos*8 / (bps * s->streams[0]->codec->channels);
86 static const AVOption pcm_options[] = {
87 { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
88 { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
92 #define PCMDEF(name_, long_name_, ext, codec) \
93 static const AVClass name_ ## _demuxer_class = { \
94 .class_name = #name_ " demuxer", \
95 .item_name = av_default_item_name, \
96 .option = pcm_options, \
97 .version = LIBAVUTIL_VERSION_INT, \
99 AVInputFormat ff_pcm_ ## name_ ## _demuxer = { \
101 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
102 .priv_data_size = sizeof(PCMAudioDemuxerContext), \
103 .read_header = pcm_read_header, \
104 .read_packet = pcm_read_packet, \
105 .read_seek = ff_pcm_read_seek, \
106 .flags = AVFMT_GENERIC_INDEX, \
108 .raw_codec_id = codec, \
109 .priv_class = &name_ ## _demuxer_class, \
112 PCMDEF(f64be, "PCM 64-bit floating-point big-endian",
113 NULL, AV_CODEC_ID_PCM_F64BE)
115 PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
116 NULL, AV_CODEC_ID_PCM_F64LE)
118 PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
119 NULL, AV_CODEC_ID_PCM_F32BE)
121 PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
122 NULL, AV_CODEC_ID_PCM_F32LE)
124 PCMDEF(s32be, "PCM signed 32-bit big-endian",
125 NULL, AV_CODEC_ID_PCM_S32BE)
127 PCMDEF(s32le, "PCM signed 32-bit little-endian",
128 NULL, AV_CODEC_ID_PCM_S32LE)
130 PCMDEF(s24be, "PCM signed 24-bit big-endian",
131 NULL, AV_CODEC_ID_PCM_S24BE)
133 PCMDEF(s24le, "PCM signed 24-bit little-endian",
134 NULL, AV_CODEC_ID_PCM_S24LE)
136 PCMDEF(s16be, "PCM signed 16-bit big-endian",
137 AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE)
139 PCMDEF(s16le, "PCM signed 16-bit little-endian",
140 AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE)
142 PCMDEF(s8, "PCM signed 8-bit",
143 "sb", AV_CODEC_ID_PCM_S8)
145 PCMDEF(u32be, "PCM unsigned 32-bit big-endian",
146 NULL, AV_CODEC_ID_PCM_U32BE)
148 PCMDEF(u32le, "PCM unsigned 32-bit little-endian",
149 NULL, AV_CODEC_ID_PCM_U32LE)
151 PCMDEF(u24be, "PCM unsigned 24-bit big-endian",
152 NULL, AV_CODEC_ID_PCM_U24BE)
154 PCMDEF(u24le, "PCM unsigned 24-bit little-endian",
155 NULL, AV_CODEC_ID_PCM_U24LE)
157 PCMDEF(u16be, "PCM unsigned 16-bit big-endian",
158 AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE)
160 PCMDEF(u16le, "PCM unsigned 16-bit little-endian",
161 AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE)
163 PCMDEF(u8, "PCM unsigned 8-bit",
164 "ub", AV_CODEC_ID_PCM_U8)
166 PCMDEF(alaw, "PCM A-law",
167 "al", AV_CODEC_ID_PCM_ALAW)
169 PCMDEF(mulaw, "PCM mu-law",
170 "ul", AV_CODEC_ID_PCM_MULAW)