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Data Structures | Macros | Functions | Variables
dashenc.c File Reference
#include "config.h"
#include "libavutil/avassert.h"
#include "libavutil/avutil.h"
#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/rational.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"
#include "dash.h"

Go to the source code of this file.

Data Structures

struct  Segment
 
struct  AdaptationSet
 
struct  OutputStream
 
struct  DASHContext
 
struct  codec_string
 

Macros

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

Functions

static void set_codec_str (AVFormatContext *s, AVCodecParameters *par, char *str, int size)
 
static int flush_dynbuf (OutputStream *os, int *range_length)
 
static int flush_init_segment (AVFormatContext *s, OutputStream *os)
 
static void dash_free (AVFormatContext *s)
 
static void output_segment_list (OutputStream *os, AVIOContext *out, DASHContext *c)
 
static char * xmlescape (const char *str)
 
static void write_time (AVIOContext *out, int64_t time)
 
static void format_date_now (char *buf, int size)
 
static int write_adaptation_set (AVFormatContext *s, AVIOContext *out, int as_index)
 
static int add_adaptation_set (AVFormatContext *s, AdaptationSet **as, enum AVMediaType type)
 
static int adaptation_set_add_stream (AVFormatContext *s, int as_idx, int i)
 
static int parse_adaptation_sets (AVFormatContext *s)
 
static int write_manifest (AVFormatContext *s, int final)
 
static int dict_copy_entry (AVDictionary **dst, const AVDictionary *src, const char *key)
 
static int dict_set_int (AVDictionary **pm, const char *key, int64_t value, int flags)
 
static int dash_init (AVFormatContext *s)
 
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, AVCodecParameters *par)
 
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)
 
static int dash_check_bitstream (struct AVFormatContext *s, const AVPacket *avpkt)
 

Variables

static struct codec_string codecs []
 
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 1178 of file dashenc.c.

#define E   AV_OPT_FLAG_ENCODING_PARAM

Definition at line 1179 of file dashenc.c.

Function Documentation

static void set_codec_str ( AVFormatContext *  s,
AVCodecParameters *  par,
char *  str,
int  size 
)
static

Definition at line 116 of file dashenc.c.

Referenced by dash_init(), and update_stream_extradata().

static int flush_dynbuf ( OutputStream *  os,
int *  range_length 
)
static

Definition at line 191 of file dashenc.c.

Referenced by dash_flush(), and flush_init_segment().

static int flush_init_segment ( AVFormatContext *  s,
OutputStream *  os 
)
static

Definition at line 213 of file dashenc.c.

Referenced by dash_flush(), and dash_init().

static void dash_free ( AVFormatContext *  s)
static

Definition at line 228 of file dashenc.c.

Referenced by dash_write_header().

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

Definition at line 258 of file dashenc.c.

Referenced by write_adaptation_set().

static char* xmlescape ( const char *  str)
static

Definition at line 320 of file dashenc.c.

Referenced by write_manifest().

static void write_time ( AVIOContext *  out,
int64_t  time 
)
static

Definition at line 360 of file dashenc.c.

Referenced by write_manifest().

static void format_date_now ( char *  buf,
int  size 
)
static

Definition at line 376 of file dashenc.c.

Referenced by write_manifest().

static int write_adaptation_set ( AVFormatContext *  s,
AVIOContext *  out,
int  as_index 
)
static

Definition at line 387 of file dashenc.c.

Referenced by write_manifest().

static int add_adaptation_set ( AVFormatContext *  s,
AdaptationSet **  as,
enum AVMediaType  type 
)
static

Definition at line 434 of file dashenc.c.

Referenced by parse_adaptation_sets().

static int adaptation_set_add_stream ( AVFormatContext *  s,
int  as_idx,
int  i 
)
static

Definition at line 451 of file dashenc.c.

Referenced by parse_adaptation_sets().

static int parse_adaptation_sets ( AVFormatContext *  s)
static

Definition at line 469 of file dashenc.c.

Referenced by dash_init().

static int write_manifest ( AVFormatContext *  s,
int  final 
)
static

Definition at line 568 of file dashenc.c.

Referenced by dash_flush(), and dash_write_header().

static int dict_copy_entry ( AVDictionary **  dst,
const AVDictionary *  src,
const char *  key 
)
static

Definition at line 659 of file dashenc.c.

Referenced by dash_init().

static int dict_set_int ( AVDictionary **  pm,
const char *  key,
int64_t  value,
int  flags 
)
static

Definition at line 667 of file dashenc.c.

Referenced by dash_init().

static int dash_init ( AVFormatContext *  s)
static

Definition at line 675 of file dashenc.c.

static int dash_write_header ( AVFormatContext *  s)
static

Definition at line 835 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 852 of file dashenc.c.

Referenced by dash_flush().

static void write_styp ( AVIOContext *  pb)
static

Definition at line 886 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 896 of file dashenc.c.

Referenced by dash_flush().

static int update_stream_extradata ( AVFormatContext *  s,
OutputStream *  os,
AVCodecParameters *  par 
)
static

Definition at line 919 of file dashenc.c.

Referenced by dash_write_packet().

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

Definition at line 942 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 1048 of file dashenc.c.

static int dash_write_trailer ( AVFormatContext *  s)
static

Definition at line 1123 of file dashenc.c.

static int dash_check_bitstream ( struct AVFormatContext *  s,
const AVPacket *  avpkt 
)
static

Definition at line 1155 of file dashenc.c.

Variable Documentation

struct codec_string codecs[]
static
Initial value:
= {
{ AV_CODEC_ID_VP8, "vp8" },
{ AV_CODEC_ID_VP9, "vp9" },
{ AV_CODEC_ID_VORBIS, "vorbis" },
{ AV_CODEC_ID_OPUS, "opus" },
{ 0, NULL }
}
NULL
#define NULL
Definition: coverity.c:32
AV_CODEC_ID_VP9
Definition: avcodec.h:388
AV_CODEC_ID_OPUS
Definition: avcodec.h:619
AV_CODEC_ID_VP8
Definition: avcodec.h:360
AV_CODEC_ID_VORBIS
Definition: avcodec.h:561

Referenced by get_codecs_sorted(), print_codecs(), set_codec_str(), and show_codecs().

const AVOption options[]
static
Initial value:
= {
{ "adaptation_sets", "Adaptation sets. Syntax: id=0,streams=0,1,2 id=1,streams=3,4 and so on", OFFSET(adaptation_sets), AV_OPT_TYPE_STRING, { 0 }, 0, 0, AV_OPT_FLAG_ENCODING_PARAM },
{ "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_BOOL, { .i64 = 0 }, 0, 1, E },
{ "use_template", "Use SegmentTemplate instead of SegmentList", OFFSET(use_template), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
{ "use_timeline", "Use SegmentTimeline in SegmentTemplate", OFFSET(use_timeline), AV_OPT_TYPE_BOOL, { .i64 = 1 }, 0, 1, E },
{ "single_file", "Store all segments in one file, accessed using byte ranges", OFFSET(single_file), AV_OPT_TYPE_BOOL, { .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 },
{ "utc_timing_url", "URL of the page that will return the UTC timestamp in ISO format", OFFSET(utc_timing_url), AV_OPT_TYPE_STRING, { 0 }, 0, 0, E },
{ NULL },
}
NULL
#define NULL
Definition: coverity.c:32
AV_OPT_TYPE_INT64
Definition: opt.h:224
AV_OPT_TYPE_INT
Definition: opt.h:223
AV_OPT_TYPE_STRING
Definition: opt.h:227
AV_OPT_FLAG_ENCODING_PARAM
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:276
E
#define E
Definition: dashenc.c:1179
AV_OPT_TYPE_BOOL
Definition: opt.h:240
OFFSET
#define OFFSET(x)
Definition: dashenc.c:1178

Definition at line 1180 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,
}
options
static const AVOption options[]
Definition: dashenc.c:1180
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:86
av_default_item_name
av_default_item_name
Definition: libopenh264enc.c:78

Definition at line 1196 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,
.init = dash_init,
.write_header = dash_write_header,
.write_packet = dash_write_packet,
.write_trailer = dash_write_trailer,
.deinit = dash_free,
.check_bitstream = dash_check_bitstream,
.priv_class = &dash_class,
}
write_packet
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:671
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AV_CODEC_ID_H264
Definition: avcodec.h:247
dash_init
static int dash_init(AVFormatContext *s)
Definition: dashenc.c:675
AV_CODEC_ID_AAC
Definition: avcodec.h:558
flags
static int flags
Definition: log.c:57
dash_write_packet
static int dash_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: dashenc.c:1048
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:179
dash_check_bitstream
static int dash_check_bitstream(struct AVFormatContext *s, const AVPacket *avpkt)
Definition: dashenc.c:1155
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
AVFMT_GLOBALHEADER
#define AVFMT_GLOBALHEADER
Format wants global header.
Definition: avformat.h:485
AVFMT_NOFILE
#define AVFMT_NOFILE
Demuxer will use avio_open, no opened file should be provided by the caller.
Definition: avformat.h:478
dash_write_header
static int dash_write_header(AVFormatContext *s)
Definition: dashenc.c:835
dash_write_trailer
static int dash_write_trailer(AVFormatContext *s)
Definition: dashenc.c:1123
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
dash_free
static void dash_free(AVFormatContext *s)
Definition: dashenc.c:228
AVFMT_TS_NEGATIVE
#define AVFMT_TS_NEGATIVE
Format allows muxing negative timestamps.
Definition: avformat.h:501
dash_class
static const AVClass dash_class
Definition: dashenc.c:1196

Definition at line 1203 of file dashenc.c.

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