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pcmdec.c
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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;
32  int channels;
34 
36 {
38  AVStream *st;
39 
40  st = avformat_new_stream(s, NULL);
41  if (!st)
42  return AVERROR(ENOMEM);
43 
44 
47  st->codec->sample_rate = s1->sample_rate;
48  st->codec->channels = s1->channels;
49 
52 
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",
90 
91 PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
93 
94 PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
96 
97 PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
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)