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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  uint8_t *mime_type = NULL;
40 
41  st = avformat_new_stream(s, NULL);
42  if (!st)
43  return AVERROR(ENOMEM);
44 
45 
48  st->codecpar->sample_rate = s1->sample_rate;
49  st->codecpar->channels = s1->channels;
50 
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, ";");
60  if (!options++)
61  break;
62  if (!rate)
63  sscanf(options, " rate=%d", &rate);
64  if (!channels)
65  sscanf(options, " channels=%d", &channels);
66  }
67  if (rate <= 0) {
69  "Invalid sample_rate found in mime_type \"%s\"\n",
70  mime_type);
71  av_freep(&mime_type);
72  return AVERROR_INVALIDDATA;
73  }
74  st->codecpar->sample_rate = rate;
75  if (channels > 0)
76  st->codecpar->channels = channels;
77  }
78  }
79  av_freep(&mime_type);
80 
83 
85 
86  st->codecpar->block_align =
88 
89  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
90  return 0;
91 }
92 
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 },
96  { NULL },
97 };
98 
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, \
105 }; \
106 AVInputFormat ff_pcm_ ## name_ ## _demuxer = { \
107  .name = #name_, \
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, \
114  .extensions = ext, \
115  .raw_codec_id = codec, \
116  .priv_class = &name_ ## _demuxer_class, \
117  __VA_ARGS__ \
118 };
119 
120 PCMDEF(f64be, "PCM 64-bit floating-point big-endian",
122 
123 PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
125 
126 PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
127  NULL, AV_CODEC_ID_PCM_F32BE)
128 
129 PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
130  NULL, AV_CODEC_ID_PCM_F32LE)
131 
132 PCMDEF(s32be, "PCM signed 32-bit big-endian",
133  NULL, AV_CODEC_ID_PCM_S32BE)
134 
135 PCMDEF(s32le, "PCM signed 32-bit little-endian",
136  NULL, AV_CODEC_ID_PCM_S32LE)
137 
138 PCMDEF(s24be, "PCM signed 24-bit big-endian",
139  NULL, AV_CODEC_ID_PCM_S24BE)
140 
141 PCMDEF(s24le, "PCM signed 24-bit little-endian",
142  NULL, AV_CODEC_ID_PCM_S24LE)
143 
144 PCMDEF(s16be, "PCM signed 16-bit big-endian",
145  AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE)
146 
147 PCMDEF(s16le, "PCM signed 16-bit little-endian",
148  AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE, .mime_type = "audio/L16",)
149 
150 PCMDEF(s8, "PCM signed 8-bit",
151  "sb", AV_CODEC_ID_PCM_S8)
152 
153 PCMDEF(u32be, "PCM unsigned 32-bit big-endian",
154  NULL, AV_CODEC_ID_PCM_U32BE)
155 
156 PCMDEF(u32le, "PCM unsigned 32-bit little-endian",
157  NULL, AV_CODEC_ID_PCM_U32LE)
158 
159 PCMDEF(u24be, "PCM unsigned 24-bit big-endian",
160  NULL, AV_CODEC_ID_PCM_U24BE)
161 
162 PCMDEF(u24le, "PCM unsigned 24-bit little-endian",
163  NULL, AV_CODEC_ID_PCM_U24LE)
164 
165 PCMDEF(u16be, "PCM unsigned 16-bit big-endian",
166  AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE)
167 
168 PCMDEF(u16le, "PCM unsigned 16-bit little-endian",
169  AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE)
170 
171 PCMDEF(u8, "PCM unsigned 8-bit",
172  "ub", AV_CODEC_ID_PCM_U8)
173 
174 PCMDEF(alaw, "PCM A-law",
175  "al", AV_CODEC_ID_PCM_ALAW)
176 
177 PCMDEF(mulaw, "PCM mu-law",
178  "ul", AV_CODEC_ID_PCM_MULAW)
179 
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 },
183  { NULL },
184 };
185 
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,
191 };
192 
194  .name = "sln",
195  .long_name = NULL_IF_CONFIG_SMALL("Asterisk raw pcm"),
196  .priv_data_size = sizeof(PCMAudioDemuxerContext),
201  .extensions = "sln",
202  .raw_codec_id = AV_CODEC_ID_PCM_S16LE,
203  .priv_class = &sln_demuxer_class,
204 };
#define NULL
Definition: coverity.c:32
const char * s
Definition: avisynth_c.h:768
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AVOption.
Definition: opt.h:246
#define LIBAVUTIL_VERSION_INT
Definition: version.h:86
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:4739
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:4143
Format I/O context.
Definition: avformat.h:1349
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
uint8_t
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:4369
static int flags
Definition: log.c:57
#define A(x)
Definition: vp56_arith.h:28
const OptionDef options[]
Definition: ffserver.c:3952
#define av_log(a,...)
static const AVClass sln_demuxer_class
Definition: pcmdec.c:186
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
Definition: utils.c:1662
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:179
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:4139
simple assert() macros that are a bit more flexible than ISO C assert().
static const AVOption pcm_options[]
Definition: pcmdec.c:93
int block_align
Audio only.
Definition: avcodec.h:4260
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:557
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:528
Stream structure.
Definition: avformat.h:889
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
AVIOContext * pb
I/O context.
Definition: avformat.h:1391
Describe the class of an AVClass context structure.
Definition: log.h:67
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:487
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
Definition: opt.h:277
#define s1
Definition: regdef.h:38
#define PCMDEF(name_, long_name_, ext, codec,...)
Definition: pcmdec.c:99
int raw_codec_id
Raw demuxers store their codec ID here.
Definition: avformat.h:710
const char * mime_type
Comma-separated list of mime types.
Definition: avformat.h:696
int sample_rate
Audio only.
Definition: avcodec.h:4253
Main libavformat public API header.
struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1361
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:751
int len
void * priv_data
Format private data.
Definition: avformat.h:1377
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:4185
int channels
Audio only.
Definition: avcodec.h:4249
AVInputFormat ff_sln_demuxer
Definition: pcmdec.c:193
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:664
AVCodecParameters * codecpar
Definition: avformat.h:1252