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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  return AVERROR_INVALIDDATA;
72  }
73  st->codecpar->sample_rate = rate;
74  if (channels > 0)
75  st->codecpar->channels = channels;
76  }
77  }
78 
81 
83 
84  st->codecpar->block_align =
86 
87  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
88  return 0;
89 }
90 
91 static const AVOption pcm_options[] = {
92  { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
93  { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
94  { NULL },
95 };
96 
97 #define PCMDEF(name_, long_name_, ext, codec, ...) \
98 static const AVClass name_ ## _demuxer_class = { \
99  .class_name = #name_ " demuxer", \
100  .item_name = av_default_item_name, \
101  .option = pcm_options, \
102  .version = LIBAVUTIL_VERSION_INT, \
103 }; \
104 AVInputFormat ff_pcm_ ## name_ ## _demuxer = { \
105  .name = #name_, \
106  .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
107  .priv_data_size = sizeof(PCMAudioDemuxerContext), \
108  .read_header = pcm_read_header, \
109  .read_packet = ff_pcm_read_packet, \
110  .read_seek = ff_pcm_read_seek, \
111  .flags = AVFMT_GENERIC_INDEX, \
112  .extensions = ext, \
113  .raw_codec_id = codec, \
114  .priv_class = &name_ ## _demuxer_class, \
115  __VA_ARGS__ \
116 };
117 
118 PCMDEF(f64be, "PCM 64-bit floating-point big-endian",
120 
121 PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
123 
124 PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
125  NULL, AV_CODEC_ID_PCM_F32BE)
126 
127 PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
128  NULL, AV_CODEC_ID_PCM_F32LE)
129 
130 PCMDEF(s32be, "PCM signed 32-bit big-endian",
131  NULL, AV_CODEC_ID_PCM_S32BE)
132 
133 PCMDEF(s32le, "PCM signed 32-bit little-endian",
134  NULL, AV_CODEC_ID_PCM_S32LE)
135 
136 PCMDEF(s24be, "PCM signed 24-bit big-endian",
137  NULL, AV_CODEC_ID_PCM_S24BE)
138 
139 PCMDEF(s24le, "PCM signed 24-bit little-endian",
140  NULL, AV_CODEC_ID_PCM_S24LE)
141 
142 PCMDEF(s16be, "PCM signed 16-bit big-endian",
143  AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE)
144 
145 PCMDEF(s16le, "PCM signed 16-bit little-endian",
146  AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE, .mime_type = "audio/L16",)
147 
148 PCMDEF(s8, "PCM signed 8-bit",
149  "sb", AV_CODEC_ID_PCM_S8)
150 
151 PCMDEF(u32be, "PCM unsigned 32-bit big-endian",
152  NULL, AV_CODEC_ID_PCM_U32BE)
153 
154 PCMDEF(u32le, "PCM unsigned 32-bit little-endian",
155  NULL, AV_CODEC_ID_PCM_U32LE)
156 
157 PCMDEF(u24be, "PCM unsigned 24-bit big-endian",
158  NULL, AV_CODEC_ID_PCM_U24BE)
159 
160 PCMDEF(u24le, "PCM unsigned 24-bit little-endian",
161  NULL, AV_CODEC_ID_PCM_U24LE)
162 
163 PCMDEF(u16be, "PCM unsigned 16-bit big-endian",
164  AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE)
165 
166 PCMDEF(u16le, "PCM unsigned 16-bit little-endian",
167  AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE)
168 
169 PCMDEF(u8, "PCM unsigned 8-bit",
170  "ub", AV_CODEC_ID_PCM_U8)
171 
172 PCMDEF(alaw, "PCM A-law",
173  "al", AV_CODEC_ID_PCM_ALAW)
174 
175 PCMDEF(mulaw, "PCM mu-law",
176  "ul", AV_CODEC_ID_PCM_MULAW)
177 
178 static const AVOption sln_options[] = {
179  { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 8000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
180  { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
181  { NULL },
182 };
183 
184 static const AVClass sln_demuxer_class = {
185  .class_name = "sln demuxer",
186  .item_name = av_default_item_name,
187  .option = sln_options,
188  .version = LIBAVUTIL_VERSION_INT,
189 };
190 
192  .name = "sln",
193  .long_name = NULL_IF_CONFIG_SMALL("Asterisk raw pcm"),
194  .priv_data_size = sizeof(PCMAudioDemuxerContext),
199  .extensions = "sln",
200  .raw_codec_id = AV_CODEC_ID_PCM_S16LE,
201  .priv_class = &sln_demuxer_class,
202 };
#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:245
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
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:4549
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:3969
Format I/O context.
Definition: avformat.h:1330
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:4182
#define A(x)
Definition: vp56_arith.h:28
const OptionDef options[]
Definition: ffserver.c:3969
#define av_log(a,...)
static const AVClass sln_demuxer_class
Definition: pcmdec.c:184
#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:3473
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:3965
simple assert() macros that are a bit more flexible than ISO C assert().
static const AVOption pcm_options[]
Definition: pcmdec.c:91
int block_align
Audio only.
Definition: avcodec.h:4086
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
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:514
Stream structure.
Definition: avformat.h:881
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:1372
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:276
#define s1
Definition: regdef.h:38
#define PCMDEF(name_, long_name_, ext, codec,...)
Definition: pcmdec.c:97
int raw_codec_id
Raw demuxers store their codec ID here.
Definition: avformat.h:708
static int flags
Definition: cpu.c:47
const char * mime_type
Comma-separated list of mime types.
Definition: avformat.h:694
int sample_rate
Audio only.
Definition: avcodec.h:4079
Main libavformat public API header.
struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1342
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:732
int len
void * priv_data
Format private data.
Definition: avformat.h:1358
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:4011
int channels
Audio only.
Definition: avcodec.h:4075
AVInputFormat ff_sln_demuxer
Definition: pcmdec.c:191
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:662
AVCodecParameters * codecpar
Definition: avformat.h:1233