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22 #include "config_components.h"
46 uint8_t *mime_type =
NULL;
62 if (mime_type &&
s->iformat->mime_type) {
63 int rate = 0,
channels = 0, little_endian = 0;
69 sscanf(
options,
" rate=%d", &rate);
73 char val[
sizeof(
"little-endian")];
74 if (sscanf(
options,
" endianness=%13s",
val) == 1) {
75 little_endian = strcmp(
val,
"little-endian") == 0;
81 "Invalid sample_rate found in mime_type \"%s\"\n",
119 #define PCMDEF_0(name_, long_name_, ext, codec, ...)
120 #define PCMDEF_1(name_, long_name_, ext, codec, ...) \
121 const FFInputFormat ff_pcm_ ## name_ ## _demuxer = { \
123 .p.long_name = NULL_IF_CONFIG_SMALL(long_name_), \
124 .p.flags = AVFMT_GENERIC_INDEX, \
125 .p.extensions = ext, \
126 .p.priv_class = &pcm_demuxer_class, \
127 .priv_data_size = sizeof(PCMAudioDemuxerContext), \
128 .read_header = pcm_read_header, \
129 .read_packet = ff_pcm_read_packet, \
130 .read_seek = ff_pcm_read_seek, \
131 .raw_codec_id = codec, \
134 #define PCMDEF_2(name, long_name, ext, codec, enabled, ...) \
135 PCMDEF_ ## enabled(name, long_name, ext, codec, __VA_ARGS__)
136 #define PCMDEF_3(name, long_name, ext, codec, config, ...) \
137 PCMDEF_2(name, long_name, ext, codec, config, __VA_ARGS__)
138 #define PCMDEF_EXT(name, long_name, ext, uppercase, ...) \
139 PCMDEF_3(name, long_name, ext, AV_CODEC_ID_PCM_ ## uppercase, \
140 CONFIG_PCM_ ## uppercase ## _DEMUXER, __VA_ARGS__)
141 #define PCMDEF(name, long_name, ext, uppercase) \
142 PCMDEF_EXT(name, long_name, ext, uppercase, )
144 PCMDEF(f64be,
"PCM 64-bit floating-point big-endian",
NULL, F64BE)
145 PCMDEF(f64le,
"PCM 64-bit floating-point little-endian",
NULL, F64LE)
146 PCMDEF(f32be,
"PCM 32-bit floating-point big-endian",
NULL, F32BE)
147 PCMDEF(f32le,
"PCM 32-bit floating-point little-endian",
NULL, F32LE)
148 PCMDEF(s32be,
"PCM signed 32-bit big-endian",
NULL, S32BE)
149 PCMDEF(s32le,
"PCM signed 32-bit little-endian",
NULL, S32LE)
150 PCMDEF(s24be,
"PCM signed 24-bit big-endian",
NULL, S24BE)
151 PCMDEF(s24le,
"PCM signed 24-bit little-endian",
NULL, S24LE)
152 PCMDEF_EXT(s16be,
"PCM signed 16-bit big-endian",
153 AV_NE(
"sw",
NULL), S16BE, .p.mime_type =
"audio/L16")
167 #if CONFIG_SLN_DEMUXER
168 static const AVOption sln_options[] = {
174 static const AVClass sln_demuxer_class = {
177 .option = sln_options,
185 .p.extensions =
"sln",
186 .p.priv_class = &sln_demuxer_class,
#define AV_OPT_SEARCH_CHILDREN
Search in possible children of the given object first.
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
enum AVMediaType codec_type
General type of the encoded data.
This struct describes the properties of an encoded stream.
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
#define PCMDEF(name, long_name, ext, uppercase)
int nb_channels
Number of channels in this layout.
#define bit(string, value)
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
#define PCMDEF_EXT(name, long_name, ext, uppercase,...)
static double val(void *priv, double ch)
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static const AVOption pcm_options[]
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
static const AVClass pcm_demuxer_class
#define av_assert0(cond)
assert() equivalent, that is always enabled.
int av_stristart(const char *str, const char *pfx, const char **ptr)
Return non-zero if pfx is a prefix of str independent of case.
AVCodecParameters * codecpar
Codec parameters associated with this stream.
#define LIBAVUTIL_VERSION_INT
static int read_header(FFV1Context *f)
Describe the class of an AVClass context structure.
const char * av_default_item_name(void *ptr)
Return the context name.
AVChannelLayout ch_layout
@ AV_OPT_TYPE_CHLAYOUT
Underlying C type is AVChannelLayout.
AVChannelLayout ch_layout
Audio only.
int sample_rate
Audio only.
const OptionDef options[]
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
An AVChannelLayout holds information about the channel layout of audio data.
int block_align
Audio only.
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
static const FFInputFormat * ffifmt(const AVInputFormat *fmt)
@ AV_OPT_TYPE_INT
Underlying C type is int.
void av_channel_layout_uninit(AVChannelLayout *channel_layout)
Free any allocated data in the channel layout and reset the channel count to 0.
int av_channel_layout_copy(AVChannelLayout *dst, const AVChannelLayout *src)
Make a copy of a channel layout.
#define AV_OPT_FLAG_DECODING_PARAM
A generic parameter which can be set by the user for demuxing or decoding.
int bits_per_coded_sample
The number of bits per sample in the codedwords.
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
static int pcm_read_header(AVFormatContext *s)
static const uint32_t S8[256]
int av_opt_get(void *obj, const char *name, int search_flags, uint8_t **out_val)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.