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 typedef struct PCMAudioDemuxerContext {
33 } PCMAudioDemuxerContext;
35 static int pcm_read_header(AVFormatContext *s)
37 PCMAudioDemuxerContext *s1 = s->priv_data;
39 uint8_t *mime_type = NULL;
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 av_opt_get(s->pb, "mime_type", AV_OPT_SEARCH_CHILDREN, &mime_type);
52 if (mime_type && s->iformat->mime_type) {
53 int rate = 0, channels = 0;
54 size_t len = strlen(s->iformat->mime_type);
55 if (!strncmp(s->iformat->mime_type, mime_type, len)) {
56 uint8_t *options = mime_type + len;
57 len = strlen(mime_type);
58 while (options < mime_type + len) {
59 options = strstr(options, ";");
63 sscanf(options, " rate=%d", &rate);
65 sscanf(options, " channels=%d", &channels);
68 av_log(s, AV_LOG_ERROR,
69 "Invalid sample_rate found in mime_type \"%s\"\n",
72 return AVERROR_INVALIDDATA;
74 st->codecpar->sample_rate = rate;
76 st->codecpar->channels = channels;
81 st->codecpar->bits_per_coded_sample =
82 av_get_bits_per_sample(st->codecpar->codec_id);
84 av_assert0(st->codecpar->bits_per_coded_sample > 0);
86 st->codecpar->block_align =
87 st->codecpar->bits_per_coded_sample * st->codecpar->channels / 8;
89 avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
93 static const AVOption pcm_options[] = {
94 { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
95 { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
99 #define PCMDEF(name_, long_name_, ext, codec, ...) \
100 static const AVClass name_ ## _demuxer_class = { \
101 .class_name = #name_ " demuxer", \
102 .item_name = av_default_item_name, \
103 .option = pcm_options, \
104 .version = LIBAVUTIL_VERSION_INT, \
106 AVInputFormat ff_pcm_ ## name_ ## _demuxer = { \
108 .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
109 .priv_data_size = sizeof(PCMAudioDemuxerContext), \
110 .read_header = pcm_read_header, \
111 .read_packet = ff_pcm_read_packet, \
112 .read_seek = ff_pcm_read_seek, \
113 .flags = AVFMT_GENERIC_INDEX, \
115 .raw_codec_id = codec, \
116 .priv_class = &name_ ## _demuxer_class, \
120 PCMDEF(f64be, "PCM 64-bit floating-point big-endian",
121 NULL, AV_CODEC_ID_PCM_F64BE)
123 PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
124 NULL, AV_CODEC_ID_PCM_F64LE)
126 PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
127 NULL, AV_CODEC_ID_PCM_F32BE)
129 PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
130 NULL, AV_CODEC_ID_PCM_F32LE)
132 PCMDEF(s32be, "PCM signed 32-bit big-endian",
133 NULL, AV_CODEC_ID_PCM_S32BE)
135 PCMDEF(s32le, "PCM signed 32-bit little-endian",
136 NULL, AV_CODEC_ID_PCM_S32LE)
138 PCMDEF(s24be, "PCM signed 24-bit big-endian",
139 NULL, AV_CODEC_ID_PCM_S24BE)
141 PCMDEF(s24le, "PCM signed 24-bit little-endian",
142 NULL, AV_CODEC_ID_PCM_S24LE)
144 PCMDEF(s16be, "PCM signed 16-bit big-endian",
145 AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE)
147 PCMDEF(s16le, "PCM signed 16-bit little-endian",
148 AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE, .mime_type = "audio/L16",)
150 PCMDEF(s8, "PCM signed 8-bit",
151 "sb", AV_CODEC_ID_PCM_S8)
153 PCMDEF(u32be, "PCM unsigned 32-bit big-endian",
154 NULL, AV_CODEC_ID_PCM_U32BE)
156 PCMDEF(u32le, "PCM unsigned 32-bit little-endian",
157 NULL, AV_CODEC_ID_PCM_U32LE)
159 PCMDEF(u24be, "PCM unsigned 24-bit big-endian",
160 NULL, AV_CODEC_ID_PCM_U24BE)
162 PCMDEF(u24le, "PCM unsigned 24-bit little-endian",
163 NULL, AV_CODEC_ID_PCM_U24LE)
165 PCMDEF(u16be, "PCM unsigned 16-bit big-endian",
166 AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE)
168 PCMDEF(u16le, "PCM unsigned 16-bit little-endian",
169 AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE)
171 PCMDEF(u8, "PCM unsigned 8-bit",
172 "ub", AV_CODEC_ID_PCM_U8)
174 PCMDEF(alaw, "PCM A-law",
175 "al", AV_CODEC_ID_PCM_ALAW)
177 PCMDEF(mulaw, "PCM mu-law",
178 "ul", AV_CODEC_ID_PCM_MULAW)
180 static const AVOption sln_options[] = {
181 { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 8000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
182 { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
186 static const AVClass sln_demuxer_class = {
187 .class_name = "sln demuxer",
188 .item_name = av_default_item_name,
189 .option = sln_options,
190 .version = LIBAVUTIL_VERSION_INT,
193 AVInputFormat ff_sln_demuxer = {
195 .long_name = NULL_IF_CONFIG_SMALL("Asterisk raw pcm"),
196 .priv_data_size = sizeof(PCMAudioDemuxerContext),
197 .read_header = pcm_read_header,
198 .read_packet = ff_pcm_read_packet,
199 .read_seek = ff_pcm_read_seek,
200 .flags = AVFMT_GENERIC_INDEX,
202 .raw_codec_id = AV_CODEC_ID_PCM_S16LE,
203 .priv_class = &sln_demuxer_class,