FFmpeg
Data Structures | Macros | Functions | Variables
webvttdec.c File Reference

WebVTT subtitle demuxer. More...

#include "avformat.h"
#include "internal.h"
#include "subtitles.h"
#include "libavutil/bprint.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/opt.h"

Go to the source code of this file.

Data Structures

struct  WebVTTContext
 

Macros

#define SET_SIDE_DATA(name, type)
 
#define OFFSET(x)   offsetof(WebVTTContext, x)
 
#define KIND_FLAGS   AV_OPT_FLAG_SUBTITLE_PARAM|AV_OPT_FLAG_DECODING_PARAM
 

Functions

static int webvtt_probe (const AVProbeData *p)
 
static int64_t read_ts (const char *s)
 
static int webvtt_read_header (AVFormatContext *s)
 
static int webvtt_read_packet (AVFormatContext *s, AVPacket *pkt)
 
static int webvtt_read_seek (AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
 
static int webvtt_read_close (AVFormatContext *s)
 

Variables

static const AVOption options []
 
static const AVClass webvtt_demuxer_class
 
AVInputFormat ff_webvtt_demuxer
 

Detailed Description

WebVTT subtitle demuxer.

See also
http://dev.w3.org/html5/webvtt/

Definition in file webvttdec.c.

Macro Definition Documentation

#define SET_SIDE_DATA (   name,
  type 
)
Value:
do { \
if (name##_len) { \
if (!buf) { \
res = AVERROR(ENOMEM); \
goto end; \
} \
memcpy(buf, name, name##_len); \
} \
} while (0)
GLint GLenum type
Definition: opengl_enc.c:104
uint8_t
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:90
if(ret)
void * buf
Definition: avisynth_c.h:766
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:329
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
const char * name
Definition: opengl_enc.c:102

Referenced by webvtt_read_header().

#define OFFSET (   x)    offsetof(WebVTTContext, x)

Definition at line 194 of file webvttdec.c.

Definition at line 195 of file webvttdec.c.

Function Documentation

static int webvtt_probe ( const AVProbeData p)
static

Definition at line 40 of file webvttdec.c.

static int64_t read_ts ( const char *  s)
static

Definition at line 52 of file webvttdec.c.

Referenced by webvtt_read_header().

static int webvtt_read_header ( AVFormatContext s)
static

Definition at line 60 of file webvttdec.c.

static int webvtt_read_packet ( AVFormatContext s,
AVPacket pkt 
)
static

Definition at line 173 of file webvttdec.c.

static int webvtt_read_seek ( AVFormatContext s,
int  stream_index,
int64_t  min_ts,
int64_t  ts,
int64_t  max_ts,
int  flags 
)
static

Definition at line 179 of file webvttdec.c.

static int webvtt_read_close ( AVFormatContext s)
static

Definition at line 187 of file webvttdec.c.

Variable Documentation

const AVOption options[]
static
Initial value:
= {
{ "kind", "Set kind of WebVTT track", OFFSET(kind), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, KIND_FLAGS, "webvtt_kind" },
{ "subtitles", "WebVTT subtitles kind", 0, AV_OPT_TYPE_CONST, { .i64 = 0 }, INT_MIN, INT_MAX, KIND_FLAGS, "webvtt_kind" },
{ "captions", "WebVTT captions kind", 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_CAPTIONS }, INT_MIN, INT_MAX, KIND_FLAGS, "webvtt_kind" },
{ "descriptions", "WebVTT descriptions kind", 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_DESCRIPTIONS }, INT_MIN, INT_MAX, KIND_FLAGS, "webvtt_kind" },
{ "metadata", "WebVTT metadata kind", 0, AV_OPT_TYPE_CONST, { .i64 = AV_DISPOSITION_METADATA }, INT_MIN, INT_MAX, KIND_FLAGS, "webvtt_kind" },
{ NULL }
}
#define AV_DISPOSITION_METADATA
Definition: avformat.h:863
#define NULL
Definition: coverity.c:32
#define KIND_FLAGS
Definition: webvttdec.c:195
#define AV_DISPOSITION_CAPTIONS
To specify text track kind (different from subtitles default).
Definition: avformat.h:861
#define AV_DISPOSITION_DESCRIPTIONS
Definition: avformat.h:862
#define OFFSET(x)
Definition: webvttdec.c:194

Definition at line 197 of file webvttdec.c.

const AVClass webvtt_demuxer_class
static
Initial value:
= {
.class_name = "WebVTT demuxer",
.item_name = av_default_item_name,
.option = options,
}
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
static const AVOption options[]
Definition: webvttdec.c:197
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:191

Definition at line 206 of file webvttdec.c.

AVInputFormat ff_webvtt_demuxer
Initial value:
= {
.name = "webvtt",
.long_name = NULL_IF_CONFIG_SMALL("WebVTT subtitle"),
.priv_data_size = sizeof(WebVTTContext),
.read_seek2 = webvtt_read_seek,
.extensions = "vtt",
.priv_class = &webvtt_demuxer_class,
}
static int webvtt_read_close(AVFormatContext *s)
Definition: webvttdec.c:187
static int webvtt_read_header(AVFormatContext *s)
Definition: webvttdec.c:60
static int webvtt_read_seek(AVFormatContext *s, int stream_index, int64_t min_ts, int64_t ts, int64_t max_ts, int flags)
Definition: webvttdec.c:179
static int webvtt_probe(const AVProbeData *p)
Definition: webvttdec.c:40
static const AVClass webvtt_demuxer_class
Definition: webvttdec.c:206
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
static int webvtt_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: webvttdec.c:173

Definition at line 213 of file webvttdec.c.