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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->codecpar->sample_rate = s1->sample_rate;
48  st->codecpar->channels = s1->channels;
49 
52 
54 
55  st->codecpar->block_align =
57 
58  avpriv_set_pts_info(st, 64, 1, st->codecpar->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)
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 
162  .name = "sln",
163  .long_name = NULL_IF_CONFIG_SMALL("Asterisk raw pcm"),
164  .priv_data_size = sizeof(PCMAudioDemuxerContext),
169  .extensions = "sln",
170  .raw_codec_id = AV_CODEC_ID_PCM_S16LE,
171  .priv_class = &sln_demuxer_class,
172 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:631
AVOption.
Definition: opt.h:245
#define PCMDEF(name_, long_name_, ext, codec)
Definition: pcmdec.c:68
#define LIBAVUTIL_VERSION_INT
Definition: version.h:70
static int pcm_read_header(AVFormatContext *s)
Definition: pcmdec.c:35
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4399
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3911
Format I/O context.
Definition: avformat.h:1319
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
AVOptions.
#define AV_NE(be, le)
Definition: common.h:50
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4037
#define A(x)
Definition: vp56_arith.h:28
static const AVClass sln_demuxer_class
Definition: pcmdec.c:154
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:3436
av_default_item_name
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:176
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3907
simple assert() macros that are a bit more flexible than ISO C assert().
static const AVOption pcm_options[]
Definition: pcmdec.c:62
int block_align
Audio only.
Definition: avcodec.h:4028
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:45
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
Stream structure.
Definition: avformat.h:876
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int ff_pcm_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: pcm.c:29
sample_rate
Describe the class of an AVClass context structure.
Definition: log.h:67
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:485
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:276
#define s1
Definition: regdef.h:38
int raw_codec_id
Raw demuxers store their codec ID here.
Definition: avformat.h:706
static int flags
Definition: cpu.c:47
int sample_rate
Audio only.
Definition: avcodec.h:4021
Main libavformat public API header.
struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1331
void * priv_data
Format private data.
Definition: avformat.h:1347
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3953
int channels
Audio only.
Definition: avcodec.h:4017
AVInputFormat ff_sln_demuxer
Definition: pcmdec.c:161
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:660
AVCodecParameters * codecpar
Definition: avformat.h:1006