dashenc.c File Reference

#include "config.h"
#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/time_internal.h"
#include "avc.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "isom.h"
#include "os_support.h"
#include "url.h"

Go to the source code of this file.

Data Structures
struct	Segment
struct	OutputStream
struct	DASHContext

Macros
#define	OFFSET(x)   offsetof(DASHContext, x)
#define	E   AV_OPT_FLAG_ENCODING_PARAM

Enumerations
enum	DASHTmplId {   DASH_TMPL_ID_UNDEFINED = -1, DASH_TMPL_ID_ESCAPE, DASH_TMPL_ID_REP_ID, DASH_TMPL_ID_NUMBER,   DASH_TMPL_ID_BANDWIDTH, DASH_TMPL_ID_TIME }

Functions
static int	dash_write (void *opaque, uint8_t *buf, int buf_size)
static void	set_codec_str (AVFormatContext *s, AVCodecContext *codec, char *str, int size)
static void	dash_free (AVFormatContext *s)
static void	output_segment_list (OutputStream *os, AVIOContext *out, DASHContext *c)
static DASHTmplId	dash_read_tmpl_id (const char *identifier, char *format_tag, size_t format_tag_size, const char **ptr)
static void	dash_fill_tmpl_params (char *dst, size_t buffer_size, const char *template, int rep_id, int number, int bit_rate, int64_t time)
static char *	xmlescape (const char *str)
static void	write_time (AVIOContext *out, int64_t time)
static int	write_manifest (AVFormatContext *s, int final)
static int	dash_write_header (AVFormatContext *s)
static int	add_segment (OutputStream *os, const char *file, int64_t time, int duration, int64_t start_pos, int64_t range_length, int64_t index_length)
static void	write_styp (AVIOContext *pb)
static void	find_index_range (AVFormatContext *s, const char *full_path, int64_t pos, int *index_length)
static int	update_stream_extradata (AVFormatContext *s, OutputStream *os, AVCodecContext *codec)
static int	dash_flush (AVFormatContext *s, int final, int stream)
static int	dash_write_packet (AVFormatContext *s, AVPacket *pkt)
static int	dash_write_trailer (AVFormatContext *s)

Variables
static const AVOption	options []
static const AVClass	dash_class
AVOutputFormat	ff_dash_muxer

Macro Definition Documentation

#define OFFSET

(

x

)

offsetof(DASHContext, x)

Definition at line 956 of file dashenc.c.

#define E   AV_OPT_FLAG_ENCODING_PARAM

Definition at line 957 of file dashenc.c.

Enumeration Type Documentation

enum DASHTmplId

Enumerator:

DASH_TMPL_ID_UNDEFINED
DASH_TMPL_ID_ESCAPE
DASH_TMPL_ID_REP_ID
DASH_TMPL_ID_NUMBER
DASH_TMPL_ID_BANDWIDTH
DASH_TMPL_ID_TIME

Definition at line 42 of file dashenc.c.

Function Documentation

static int dash_write ( void *  opaque, uint8_t *  buf, int  buf_size  )

static

Definition at line 98 of file dashenc.c.

Referenced by dash_write_header().

static void set_codec_str ( AVFormatContext *  s, AVCodecContext *  codec, char *  str, int  size  )

static

Definition at line 107 of file dashenc.c.

Referenced by dash_write_header(), and update_stream_extradata().

static void dash_free ( AVFormatContext *  s )

static

Definition at line 172 of file dashenc.c.

Referenced by dash_write_header(), and dash_write_trailer().

static void output_segment_list ( OutputStream *  os, AVIOContext *  out, DASHContext *  c  )

static

Definition at line 195 of file dashenc.c.

Referenced by write_manifest().

static DASHTmplId dash_read_tmpl_id ( const char *  identifier, char *  format_tag, size_t  format_tag_size, const char **  ptr  )

static

Definition at line 257 of file dashenc.c.

Referenced by dash_fill_tmpl_params().

static void dash_fill_tmpl_params ( char *  dst, size_t  buffer_size, const char *  template, int  rep_id, int  number, int  bit_rate, int64_t  time  )

static

Definition at line 309 of file dashenc.c.

Referenced by dash_flush(), and dash_write_header().

static char* xmlescape ( const char *  str )

static

Definition at line 370 of file dashenc.c.

Referenced by write_manifest().

static void write_time ( AVIOContext *  out, int64_t  time  )

static

Definition at line 410 of file dashenc.c.

Referenced by write_manifest().

static int write_manifest ( AVFormatContext *  s, int  final  )

static

Definition at line 426 of file dashenc.c.

Referenced by dash_flush(), and dash_write_header().

static int dash_write_header ( AVFormatContext *  s )

static

Definition at line 534 of file dashenc.c.

static int add_segment ( OutputStream *  os, const char *  file, int64_t  time, int  duration, int64_t  start_pos, int64_t  range_length, int64_t  index_length  )

static

Definition at line 674 of file dashenc.c.

Referenced by dash_flush().

static void write_styp ( AVIOContext *  pb )

static

Definition at line 706 of file dashenc.c.

Referenced by dash_flush().

static void find_index_range ( AVFormatContext *  s, const char *  full_path, int64_t  pos, int *  index_length  )

static

Definition at line 716 of file dashenc.c.

Referenced by dash_flush().

static int update_stream_extradata ( AVFormatContext *  s, OutputStream *  os, AVCodecContext *  codec  )

static

Definition at line 739 of file dashenc.c.

Referenced by dash_write_packet().

static int dash_flush ( AVFormatContext *  s, int  final, int  stream  )

static

Definition at line 762 of file dashenc.c.

Referenced by dash_write_packet(), and dash_write_trailer().

static int dash_write_packet ( AVFormatContext *  s, AVPacket *  pkt  )

static

Definition at line 857 of file dashenc.c.

static int dash_write_trailer ( AVFormatContext *  s )

static

Definition at line 923 of file dashenc.c.

Variable Documentation

const AVOption options[]

static

Initial value:

= {
    { "window_size", "number of segments kept in the manifest", OFFSET(window_size), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, E },
    { "extra_window_size", "number of segments kept outside of the manifest before removing from disk", OFFSET(extra_window_size), AV_OPT_TYPE_INT, { .i64 = 5 }, 0, INT_MAX, E },
    { "min_seg_duration", "minimum segment duration (in microseconds)", OFFSET(min_seg_duration), AV_OPT_TYPE_INT64, { .i64 = 5000000 }, 0, INT_MAX, E },
    { "remove_at_exit", "remove all segments when finished", OFFSET(remove_at_exit), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E },
    { "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
    { "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, 1, E },
    { "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, E },
    { "single_file_name", "DASH-templated name to be used for baseURL. Implies storing all segments in one file, accessed using byte ranges", OFFSET(single_file_name), AV_OPT_TYPE_STRING, { .str = NULL }, 0, 0, E },
    { "init_seg_name", "DASH-templated name to used for the initialization segment", OFFSET(init_seg_name), AV_OPT_TYPE_STRING, {.str = "init-stream$RepresentationID$.m4s"}, 0, 0, E },
    { "media_seg_name", "DASH-templated name to used for the media segments", OFFSET(media_seg_name), AV_OPT_TYPE_STRING, {.str = "chunk-stream$RepresentationID$-$Number%05d$.m4s"}, 0, 0, E },
    { NULL },
}

Definition at line 958 of file dashenc.c.

const AVClass dash_class

static

Initial value:

= {
    .class_name = "dash muxer",
    .item_name  = av_default_item_name,
    .option     = options,
    .version    = LIBAVUTIL_VERSION_INT,
}

Definition at line 972 of file dashenc.c.

AVOutputFormat ff_dash_muxer

Initial value:

= {
    .name           = "dash",
    .long_name      = NULL_IF_CONFIG_SMALL("DASH Muxer"),
    .priv_data_size = sizeof(DASHContext),
    .audio_codec    = AV_CODEC_ID_AAC,
    .video_codec    = AV_CODEC_ID_H264,
    .flags          = AVFMT_GLOBALHEADER | AVFMT_NOFILE | AVFMT_TS_NEGATIVE,
    .write_header   = dash_write_header,
    .write_packet   = dash_write_packet,
    .write_trailer  = dash_write_trailer,
    .codec_tag      = (const AVCodecTag* const []){ ff_mp4_obj_type, 0 },
    .priv_class     = &dash_class,
}

Definition at line 979 of file dashenc.c.