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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, little_endian = 0;
54  size_t len = strlen(s->iformat->mime_type);
55  if (!av_strncasecmp(s->iformat->mime_type, mime_type, len)) { /* audio/L16 */
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  if (!little_endian) {
67  char val[14]; /* sizeof("little-endian") == 14 */
68  if (sscanf(options, " endianness=%13s", val) == 1) {
69  little_endian = strcmp(val, "little-endian") == 0;
70  }
71  }
72  }
73  if (rate <= 0) {
75  "Invalid sample_rate found in mime_type \"%s\"\n",
76  mime_type);
77  av_freep(&mime_type);
78  return AVERROR_INVALIDDATA;
79  }
80  st->codecpar->sample_rate = rate;
81  if (channels > 0)
82  st->codecpar->channels = channels;
83  if (little_endian)
85  }
86  }
87  av_freep(&mime_type);
88 
91 
93 
94  st->codecpar->block_align =
96 
97  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
98  return 0;
99 }
100 
101 static const AVOption pcm_options[] = {
102  { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 44100}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
103  { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
104  { NULL },
105 };
106 
107 #define PCMDEF(name_, long_name_, ext, codec, ...) \
108 static const AVClass name_ ## _demuxer_class = { \
109  .class_name = #name_ " demuxer", \
110  .item_name = av_default_item_name, \
111  .option = pcm_options, \
112  .version = LIBAVUTIL_VERSION_INT, \
113 }; \
114 AVInputFormat ff_pcm_ ## name_ ## _demuxer = { \
115  .name = #name_, \
116  .long_name = NULL_IF_CONFIG_SMALL(long_name_), \
117  .priv_data_size = sizeof(PCMAudioDemuxerContext), \
118  .read_header = pcm_read_header, \
119  .read_packet = ff_pcm_read_packet, \
120  .read_seek = ff_pcm_read_seek, \
121  .flags = AVFMT_GENERIC_INDEX, \
122  .extensions = ext, \
123  .raw_codec_id = codec, \
124  .priv_class = &name_ ## _demuxer_class, \
125  __VA_ARGS__ \
126 };
127 
128 PCMDEF(f64be, "PCM 64-bit floating-point big-endian",
130 
131 PCMDEF(f64le, "PCM 64-bit floating-point little-endian",
133 
134 PCMDEF(f32be, "PCM 32-bit floating-point big-endian",
135  NULL, AV_CODEC_ID_PCM_F32BE)
136 
137 PCMDEF(f32le, "PCM 32-bit floating-point little-endian",
138  NULL, AV_CODEC_ID_PCM_F32LE)
139 
140 PCMDEF(s32be, "PCM signed 32-bit big-endian",
141  NULL, AV_CODEC_ID_PCM_S32BE)
142 
143 PCMDEF(s32le, "PCM signed 32-bit little-endian",
144  NULL, AV_CODEC_ID_PCM_S32LE)
145 
146 PCMDEF(s24be, "PCM signed 24-bit big-endian",
147  NULL, AV_CODEC_ID_PCM_S24BE)
148 
149 PCMDEF(s24le, "PCM signed 24-bit little-endian",
150  NULL, AV_CODEC_ID_PCM_S24LE)
151 
152 PCMDEF(s16be, "PCM signed 16-bit big-endian",
153  AV_NE("sw", NULL), AV_CODEC_ID_PCM_S16BE, .mime_type = "audio/L16")
154 
155 PCMDEF(s16le, "PCM signed 16-bit little-endian",
156  AV_NE(NULL, "sw"), AV_CODEC_ID_PCM_S16LE)
157 
158 PCMDEF(s8, "PCM signed 8-bit",
159  "sb", AV_CODEC_ID_PCM_S8)
160 
161 PCMDEF(u32be, "PCM unsigned 32-bit big-endian",
162  NULL, AV_CODEC_ID_PCM_U32BE)
163 
164 PCMDEF(u32le, "PCM unsigned 32-bit little-endian",
165  NULL, AV_CODEC_ID_PCM_U32LE)
166 
167 PCMDEF(u24be, "PCM unsigned 24-bit big-endian",
168  NULL, AV_CODEC_ID_PCM_U24BE)
169 
170 PCMDEF(u24le, "PCM unsigned 24-bit little-endian",
171  NULL, AV_CODEC_ID_PCM_U24LE)
172 
173 PCMDEF(u16be, "PCM unsigned 16-bit big-endian",
174  AV_NE("uw", NULL), AV_CODEC_ID_PCM_U16BE)
175 
176 PCMDEF(u16le, "PCM unsigned 16-bit little-endian",
177  AV_NE(NULL, "uw"), AV_CODEC_ID_PCM_U16LE)
178 
179 PCMDEF(u8, "PCM unsigned 8-bit",
180  "ub", AV_CODEC_ID_PCM_U8)
181 
182 PCMDEF(alaw, "PCM A-law",
183  "al", AV_CODEC_ID_PCM_ALAW)
184 
185 PCMDEF(mulaw, "PCM mu-law",
186  "ul", AV_CODEC_ID_PCM_MULAW)
187 
188 PCMDEF(vidc, "PCM Archimedes VIDC",
189  NULL, AV_CODEC_ID_PCM_VIDC)
190 
191 static const AVOption sln_options[] = {
192  { "sample_rate", "", offsetof(PCMAudioDemuxerContext, sample_rate), AV_OPT_TYPE_INT, {.i64 = 8000}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
193  { "channels", "", offsetof(PCMAudioDemuxerContext, channels), AV_OPT_TYPE_INT, {.i64 = 1}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
194  { NULL },
195 };
196 
197 static const AVClass sln_demuxer_class = {
198  .class_name = "sln demuxer",
199  .item_name = av_default_item_name,
200  .option = sln_options,
201  .version = LIBAVUTIL_VERSION_INT,
202 };
203 
205  .name = "sln",
206  .long_name = NULL_IF_CONFIG_SMALL("Asterisk raw pcm"),
207  .priv_data_size = sizeof(PCMAudioDemuxerContext),
212  .extensions = "sln",
213  .raw_codec_id = AV_CODEC_ID_PCM_S16LE,
214  .priv_class = &sln_demuxer_class,
215 };
#define NULL
Definition: coverity.c:32
const char const char void * val
Definition: avisynth_c.h:771
#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: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:4882
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
channels
Definition: aptx.c:30
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3917
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191
int av_strncasecmp(const char *a, const char *b, size_t n)
Locale-independent case-insensitive compare.
Definition: avstring.c:223
Format I/O context.
Definition: avformat.h:1351
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:4455
#define A(x)
Definition: vp56_arith.h:28
#define av_log(a,...)
static const AVClass sln_demuxer_class
Definition: pcmdec.c:197
#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:1508
#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:186
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3913
simple assert() macros that are a bit more flexible than ISO C assert().
static const AVOption pcm_options[]
Definition: pcmdec.c:101
int block_align
Audio only.
Definition: avcodec.h:4034
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Definition: opt.h:556
#define s(width, name)
Definition: cbs_vp9.c:257
int ff_pcm_read_seek(AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
Definition: pcm.c:52
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
Stream structure.
Definition: avformat.h:874
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:1393
Describe the class of an AVClass context structure.
Definition: log.h:67
#define AVFMT_GENERIC_INDEX
Use generic index building code.
Definition: avformat.h:470
#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:107
int raw_codec_id
Raw demuxers store their codec ID here.
Definition: avformat.h:693
#define flags(name, subs,...)
Definition: cbs_av1.c:584
const char * mime_type
Comma-separated list of mime types.
Definition: avformat.h:679
int sample_rate
Audio only.
Definition: avcodec.h:4027
Main libavformat public API header.
const OptionDef options[]
Definition: ffmpeg_opt.c:3324
struct AVInputFormat * iformat
The input container format.
Definition: avformat.h:1363
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
Definition: opt.c:761
int len
void * priv_data
Format private data.
Definition: avformat.h:1379
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3959
int channels
Audio only.
Definition: avcodec.h:4023
AVInputFormat ff_sln_demuxer
Definition: pcmdec.c:204
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:647
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1021