dashdec.c File Reference

#include <libxml/parser.h>
#include <time.h>
#include "libavutil/avassert.h"
#include "libavutil/bprint.h"
#include "libavutil/mem.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "internal.h"
#include "avio_internal.h"
#include "dash.h"
#include "demux.h"
#include "url.h"

Go to the source code of this file.

Data Structures
struct	fragment
struct	timeline
struct	representation
struct	DASHContext

Macros
#define	INITIAL_BUFFER_SIZE   32768
#define	SET_REPRESENTATION_SEQUENCE_BASE_INFO(arg, cnt)
#define	OFFSET(x)
#define	FLAGS   AV_OPT_FLAG_DECODING_PARAM

Functions
static int	ishttp (char *url)
static int	aligned (int val)
static int64_t	get_current_time_in_sec (void)
static int64_t	get_utc_date_time_insec (AVFormatContext *s, const char *datetime)
static uint32_t	get_duration_insec (AVFormatContext *s, const char *duration)
static int64_t	get_segment_start_time_based_on_timeline (struct representation *pls, int64_t cur_seq_no)
static int64_t	calc_next_seg_no_from_timelines (struct representation *pls, int64_t cur_time)
static void	free_fragment (struct fragment **seg)
static void	free_fragment_list (struct representation *pls)
static void	free_timelines_list (struct representation *pls)
static void	free_representation (struct representation *pls)
static void	free_video_list (DASHContext *c)
static void	free_audio_list (DASHContext *c)
static void	free_subtitle_list (DASHContext *c)
static int	open_url (AVFormatContext *s, AVIOContext **pb, const char *url, AVDictionary **opts, AVDictionary *opts2, int *is_http)
static char *	get_content_url (xmlNodePtr *baseurl_nodes, int n_baseurl_nodes, int max_url_size, char *rep_id_val, char *rep_bandwidth_val, char *val)
static char *	get_val_from_nodes_tab (xmlNodePtr *nodes, const int n_nodes, const char *attrname)
static xmlNodePtr	find_child_node_by_name (xmlNodePtr rootnode, const char *nodename)
static enum AVMediaType	get_content_type (xmlNodePtr node)
static struct fragment *	get_fragment (AVFormatContext *s, char *range)
static int	parse_manifest_segmenturlnode (AVFormatContext *s, struct representation *rep, xmlNodePtr fragmenturl_node, xmlNodePtr *baseurl_nodes, char *rep_id_val, char *rep_bandwidth_val)
static int	parse_manifest_segmenttimeline (AVFormatContext *s, struct representation *rep, xmlNodePtr fragment_timeline_node)
static int	resolve_content_path (AVFormatContext *s, const char *url, int *max_url_size, xmlNodePtr *baseurl_nodes, int n_baseurl_nodes)
static int	parse_manifest_representation (AVFormatContext *s, const char *url, xmlNodePtr node, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, xmlNodePtr period_baseurl_node, xmlNodePtr period_segmenttemplate_node, xmlNodePtr period_segmentlist_node, xmlNodePtr fragment_template_node, xmlNodePtr content_component_node, xmlNodePtr adaptionset_baseurl_node, xmlNodePtr adaptionset_segmentlist_node, xmlNodePtr adaptionset_supplementalproperty_node)
static int	parse_manifest_adaptationset_attr (AVFormatContext *s, xmlNodePtr adaptionset_node)
static int	parse_manifest_adaptationset (AVFormatContext *s, const char *url, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, xmlNodePtr period_baseurl_node, xmlNodePtr period_segmenttemplate_node, xmlNodePtr period_segmentlist_node)
static int	parse_programinformation (AVFormatContext *s, xmlNodePtr node)
static int	parse_manifest (AVFormatContext *s, const char *url, AVIOContext *in)
static int64_t	calc_cur_seg_no (AVFormatContext *s, struct representation *pls)
static int64_t	calc_min_seg_no (AVFormatContext *s, struct representation *pls)
static int64_t	calc_max_seg_no (struct representation *pls, DASHContext *c)
static void	move_timelines (struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
static void	move_segments (struct representation *rep_src, struct representation *rep_dest, DASHContext *c)
static int	refresh_manifest (AVFormatContext *s)
static struct fragment *	get_current_fragment (struct representation *pls)
static int	read_from_url (struct representation *pls, struct fragment *seg, uint8_t *buf, int buf_size)
static int	open_input (DASHContext *c, struct representation *pls, struct fragment *seg)
static int	update_init_section (struct representation *pls)
static int64_t	seek_data (void *opaque, int64_t offset, int whence)
static int	read_data (void *opaque, uint8_t *buf, int buf_size)
static int	nested_io_open (AVFormatContext *s, AVIOContext **pb, const char *url, int flags, AVDictionary **opts)
static void	close_demux_for_component (struct representation *pls)
static int	reopen_demux_for_component (AVFormatContext *s, struct representation *pls)
static int	open_demux_for_component (AVFormatContext *s, struct representation *pls)
static int	is_common_init_section_exist (struct representation **pls, int n_pls)
static int	copy_init_section (struct representation *rep_dest, struct representation *rep_src)
static void	move_metadata (AVStream *st, const char *key, char **value)
static int	dash_read_header (AVFormatContext *s)
static void	recheck_discard_flags (AVFormatContext *s, struct representation **p, int n)
static int	dash_read_packet (AVFormatContext *s, AVPacket *pkt)
static int	dash_close (AVFormatContext *s)
static int	dash_seek (AVFormatContext *s, struct representation *pls, int64_t seek_pos_msec, int flags, int dry_run)
static int	dash_read_seek (AVFormatContext *s, int stream_index, int64_t timestamp, int flags)
static int	dash_probe (const AVProbeData *p)

Variables
static const AVOption	dash_options []
static const AVClass	dash_class
const FFInputFormat	ff_dash_demuxer

Macro Definition Documentation

INITIAL_BUFFER_SIZE

#define INITIAL_BUFFER_SIZE   32768

Definition at line 36 of file dashdec.c.

Referenced by hls_read_header(), init_subtitle_context(), and reopen_demux_for_component().

SET_REPRESENTATION_SEQUENCE_BASE_INFO

#define SET_REPRESENTATION_SEQUENCE_BASE_INFO	(		arg,
			cnt )

Definition at line 862 of file dashdec.c.

Referenced by parse_manifest_representation().

OFFSET

#define OFFSET

(

x

)

Value:

offsetof(DASHContext, x)

Definition at line 2537 of file dashdec.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_DECODING_PARAM

Definition at line 2538 of file dashdec.c.

Function Documentation

ishttp()

static int ishttp ( char * url )

static

Definition at line 172 of file dashdec.c.

Referenced by resolve_content_path().

aligned()

static int aligned ( int val )

static

Definition at line 178 of file dashdec.c.

Referenced by av_pixelutils_get_sad_fn(), check_sub_hfyu_median_pred_int16(), checkasm_check_sad(), ff_avg_h264_qpel16_mc12_mmi(), ff_avg_h264_qpel16_mc21_mmi(), ff_avg_h264_qpel16_mc22_mmi(), ff_avg_h264_qpel16_mc23_mmi(), ff_avg_h264_qpel16_mc32_mmi(), ff_avg_h264_qpel8_mc12_mmi(), ff_avg_h264_qpel8_mc21_mmi(), ff_avg_h264_qpel8_mc22_mmi(), ff_avg_h264_qpel8_mc23_mmi(), ff_avg_h264_qpel8_mc32_mmi(), ff_loop_filter_h_16_16_lsx(), ff_loop_filter_h_16_8_lsx(), ff_loop_filter_v_16_16_lsx(), ff_pixelutils_init_riscv(), ff_pixelutils_sad_init_aarch64(), ff_pixelutils_sad_init_arm(), ff_pixelutils_sad_init_mips(), ff_pixelutils_sad_init_x86(), ff_put_h264_qpel16_mc12_mmi(), ff_put_h264_qpel16_mc21_mmi(), ff_put_h264_qpel16_mc22_mmi(), ff_put_h264_qpel16_mc23_mmi(), ff_put_h264_qpel16_mc32_mmi(), ff_put_h264_qpel8_mc12_mmi(), ff_put_h264_qpel8_mc21_mmi(), ff_put_h264_qpel8_mc22_mmi(), ff_put_h264_qpel8_mc23_mmi(), ff_put_h264_qpel8_mc32_mmi(), filter_frame(), parse_manifest_representation(), realign_frame(), and resolve_content_path().

get_current_time_in_sec()

static int64_t get_current_time_in_sec ( void )

static

Definition at line 183 of file dashdec.c.

Referenced by calc_cur_seg_no(), calc_max_seg_no(), and calc_min_seg_no().

get_utc_date_time_insec()

static int64_t get_utc_date_time_insec ( AVFormatContext * s, const char * datetime )

static

Definition at line 188 of file dashdec.c.

Referenced by parse_manifest().

get_duration_insec()

static uint32_t get_duration_insec ( AVFormatContext * s, const char * duration )

static

Definition at line 218 of file dashdec.c.

Referenced by parse_manifest().

get_segment_start_time_based_on_timeline()

static int64_t get_segment_start_time_based_on_timeline ( struct representation * pls, int64_t cur_seq_no )

static

Definition at line 262 of file dashdec.c.

Referenced by calc_cur_seg_no(), get_current_fragment(), and refresh_manifest().

calc_next_seg_no_from_timelines()

static int64_t calc_next_seg_no_from_timelines ( struct representation * pls, int64_t cur_time )

static

Definition at line 298 of file dashdec.c.

Referenced by calc_cur_seg_no(), and refresh_manifest().

free_fragment()

static void free_fragment ( struct fragment ** seg )

static

Definition at line 328 of file dashdec.c.

Referenced by free_fragment_list(), free_representation(), parse_manifest_segmenturlnode(), and read_data().

free_fragment_list()

static void free_fragment_list ( struct representation * pls )

static

Definition at line 337 of file dashdec.c.

Referenced by free_representation(), and move_segments().

free_timelines_list()

static void free_timelines_list ( struct representation * pls )

static

Definition at line 348 of file dashdec.c.

Referenced by free_representation(), and move_timelines().

free_representation()

static void free_representation ( struct representation * pls )

static

Definition at line 359 of file dashdec.c.

Referenced by free_audio_list(), free_subtitle_list(), free_video_list(), and parse_manifest_representation().

free_video_list()

static void free_video_list ( DASHContext * c )

static

Definition at line 382 of file dashdec.c.

Referenced by dash_close(), and refresh_manifest().

free_audio_list()

static void free_audio_list ( DASHContext * c )

static

Definition at line 393 of file dashdec.c.

Referenced by dash_close(), and refresh_manifest().

free_subtitle_list()

static void free_subtitle_list ( DASHContext * c )

static

Definition at line 404 of file dashdec.c.

Referenced by dash_close(), and refresh_manifest().

open_url()

static int open_url ( AVFormatContext * s, AVIOContext ** pb, const char * url, AVDictionary ** opts, AVDictionary * opts2, int * is_http )

static

Definition at line 415 of file dashdec.c.

Referenced by open_input().

get_content_url()

static char * get_content_url ( xmlNodePtr * baseurl_nodes, int n_baseurl_nodes, int max_url_size, char * rep_id_val, char * rep_bandwidth_val, char * val )

static

Definition at line 482 of file dashdec.c.

Referenced by parse_manifest_representation(), and parse_manifest_segmenturlnode().

get_val_from_nodes_tab()

static char * get_val_from_nodes_tab ( xmlNodePtr * nodes, const int n_nodes, const char * attrname )

static

Definition at line 533 of file dashdec.c.

Referenced by parse_manifest_representation().

find_child_node_by_name()

static xmlNodePtr find_child_node_by_name ( xmlNodePtr rootnode, const char * nodename )

static

Definition at line 549 of file dashdec.c.

Referenced by parse_manifest(), and parse_manifest_representation().

get_content_type()

static enum AVMediaType get_content_type ( xmlNodePtr node )

static

Definition at line 566 of file dashdec.c.

Referenced by parse_manifest_representation().

get_fragment()

static struct fragment * get_fragment ( AVFormatContext * s, char * range )

static

Definition at line 592 of file dashdec.c.

Referenced by parse_manifest_segmenturlnode().

parse_manifest_segmenturlnode()

static int parse_manifest_segmenturlnode ( AVFormatContext * s, struct representation * rep, xmlNodePtr fragmenturl_node, xmlNodePtr * baseurl_nodes, char * rep_id_val, char * rep_bandwidth_val )

static

Definition at line 615 of file dashdec.c.

Referenced by parse_manifest_representation().

parse_manifest_segmenttimeline()

static int parse_manifest_segmenttimeline ( AVFormatContext * s, struct representation * rep, xmlNodePtr fragment_timeline_node )

static

Definition at line 681 of file dashdec.c.

Referenced by parse_manifest_representation().

resolve_content_path()

static int resolve_content_path ( AVFormatContext * s, const char * url, int * max_url_size, xmlNodePtr * baseurl_nodes, int n_baseurl_nodes )

static

Definition at line 722 of file dashdec.c.

Referenced by parse_manifest_representation().

parse_manifest_representation()

static int parse_manifest_representation ( AVFormatContext * s, const char * url, xmlNodePtr node, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, xmlNodePtr period_baseurl_node, xmlNodePtr period_segmenttemplate_node, xmlNodePtr period_segmentlist_node, xmlNodePtr fragment_template_node, xmlNodePtr content_component_node, xmlNodePtr adaptionset_baseurl_node, xmlNodePtr adaptionset_segmentlist_node, xmlNodePtr adaptionset_supplementalproperty_node )

static

Definition at line 899 of file dashdec.c.

Referenced by parse_manifest_adaptationset().

parse_manifest_adaptationset_attr()

static int parse_manifest_adaptationset_attr ( AVFormatContext * s, xmlNodePtr adaptionset_node )

static

Definition at line 1173 of file dashdec.c.

Referenced by parse_manifest_adaptationset().

parse_manifest_adaptationset()

static int parse_manifest_adaptationset ( AVFormatContext * s, const char * url, xmlNodePtr adaptionset_node, xmlNodePtr mpd_baseurl_node, xmlNodePtr period_baseurl_node, xmlNodePtr period_segmenttemplate_node, xmlNodePtr period_segmentlist_node )

static

Definition at line 1186 of file dashdec.c.

Referenced by parse_manifest().

parse_programinformation()

static int parse_programinformation ( AVFormatContext * s, xmlNodePtr node )

static

Definition at line 1242 of file dashdec.c.

Referenced by parse_manifest().

parse_manifest()

static int parse_manifest ( AVFormatContext * s, const char * url, AVIOContext * in )

static

Definition at line 1271 of file dashdec.c.

Referenced by dash_read_header(), and refresh_manifest().

calc_cur_seg_no()

static int64_t calc_cur_seg_no ( AVFormatContext * s, struct representation * pls )

static

Definition at line 1445 of file dashdec.c.

Referenced by get_current_fragment(), and open_demux_for_component().

calc_min_seg_no()

static int64_t calc_min_seg_no ( AVFormatContext * s, struct representation * pls )

static

Definition at line 1481 of file dashdec.c.

Referenced by get_current_fragment().

calc_max_seg_no()

static int64_t calc_max_seg_no ( struct representation * pls, DASHContext * c )

static

Definition at line 1495 of file dashdec.c.

Referenced by get_current_fragment(), move_segments(), move_timelines(), and open_demux_for_component().

move_timelines()

static void move_timelines ( struct representation * rep_src, struct representation * rep_dest, DASHContext * c )

static

Definition at line 1520 of file dashdec.c.

Referenced by refresh_manifest().

move_segments()

static void move_segments ( struct representation * rep_src, struct representation * rep_dest, DASHContext * c )

static

Definition at line 1534 of file dashdec.c.

Referenced by refresh_manifest().

refresh_manifest()

static int refresh_manifest ( AVFormatContext * s )

static

Definition at line 1555 of file dashdec.c.

Referenced by get_current_fragment().

get_current_fragment()

static struct fragment * get_current_fragment ( struct representation * pls )

static

Definition at line 1654 of file dashdec.c.

Referenced by read_data().

read_from_url()

static int read_from_url ( struct representation * pls, struct fragment * seg, uint8_t * buf, int buf_size )

static

Definition at line 1744 of file dashdec.c.

Referenced by read_data(), and update_init_section().

open_input()

static int open_input ( DASHContext * c, struct representation * pls, struct fragment * seg )

static

Definition at line 1760 of file dashdec.c.

Referenced by read_data(), and update_init_section().

update_init_section()

static int update_init_section ( struct representation * pls )

static

Definition at line 1792 of file dashdec.c.

Referenced by read_data().

seek_data()

static int64_t seek_data ( void * opaque, int64_t offset, int whence )

static

Definition at line 1838 of file dashdec.c.

Referenced by reopen_demux_for_component().

read_data()

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

static

Definition at line 1848 of file dashdec.c.

Referenced by pulse_read_packet(), reopen_demux_for_component(), and tls_handshake_loop().

nested_io_open()

static int nested_io_open ( AVFormatContext * s, AVIOContext ** pb, const char * url, int flags, AVDictionary ** opts )

static

Definition at line 1919 of file dashdec.c.

Referenced by hls_read_header(), init_subtitle_context(), and reopen_demux_for_component().

close_demux_for_component()

static void close_demux_for_component ( struct representation * pls )

static

Definition at line 1929 of file dashdec.c.

Referenced by dash_read_packet(), recheck_discard_flags(), and reopen_demux_for_component().

reopen_demux_for_component()

static int reopen_demux_for_component ( AVFormatContext * s, struct representation * pls )

static

Definition at line 1938 of file dashdec.c.

Referenced by dash_read_packet(), dash_seek(), open_demux_for_component(), and recheck_discard_flags().

open_demux_for_component()

static int open_demux_for_component ( AVFormatContext * s, struct representation * pls )

static

Definition at line 2015 of file dashdec.c.

Referenced by dash_read_header().

is_common_init_section_exist()

static int is_common_init_section_exist ( struct representation ** pls, int n_pls )

static

Definition at line 2092 of file dashdec.c.

Referenced by dash_read_header().

copy_init_section()

static int copy_init_section ( struct representation * rep_dest, struct representation * rep_src )

static

Definition at line 2119 of file dashdec.c.

Referenced by dash_read_header().

move_metadata()

static void move_metadata ( AVStream * st, const char * key, char ** value )

static

Definition at line 2134 of file dashdec.c.

Referenced by dash_read_header().

dash_read_header()

static int dash_read_header ( AVFormatContext * s )

static

Definition at line 2142 of file dashdec.c.

recheck_discard_flags()

static void recheck_discard_flags ( AVFormatContext * s, struct representation ** p, int n )

static

Definition at line 2316 of file dashdec.c.

Referenced by dash_read_packet().

dash_read_packet()

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

static

Definition at line 2344 of file dashdec.c.

dash_close()

static int dash_close ( AVFormatContext * s )

static

Definition at line 2415 of file dashdec.c.

dash_seek()

static int dash_seek ( AVFormatContext * s, struct representation * pls, int64_t seek_pos_msec, int flags, int dry_run )

static

Definition at line 2426 of file dashdec.c.

Referenced by dash_read_seek().

dash_read_seek()

static int dash_read_seek ( AVFormatContext * s, int stream_index, int64_t timestamp, int flags )

static

Definition at line 2490 of file dashdec.c.

dash_probe()

static int dash_probe ( const AVProbeData * p )

static

Definition at line 2518 of file dashdec.c.

Variable Documentation

dash_options

const AVOption dash_options[]

static

Initial value:

= {
    {"allowed_extensions", "List of file extensions that dash is allowed to access",
        OFFSET(allowed_extensions), AV_OPT_TYPE_STRING,
        {.str = "aac,m4a,m4s,m4v,mov,mp4,webm,ts"},
        INT_MIN, INT_MAX, FLAGS},
    { "cenc_decryption_key", "Media default decryption key (hex)", OFFSET(cenc_decryption_key), AV_OPT_TYPE_STRING, {.str = NULL}, INT_MIN, INT_MAX, .flags = FLAGS },
    { "cenc_decryption_keys", "Media decryption keys by KID (hex)", OFFSET(cenc_decryption_keys), AV_OPT_TYPE_STRING, {.str = NULL}, INT_MIN, INT_MAX, .flags = FLAGS },
    { "max_reload", "Maximum number of manifest reloads in get_current_fragment() before giving up",
        OFFSET(max_reload), AV_OPT_TYPE_INT, { .i64 = 100 }, 0, INT_MAX, FLAGS },
    {NULL}
}

Definition at line 2539 of file dashdec.c.

dash_class

const AVClass dash_class

static

Initial value:

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

Definition at line 2551 of file dashdec.c.

ff_dash_demuxer

const FFInputFormat ff_dash_demuxer

Initial value:

= {
    .p.name         = "dash",
    .p.long_name    = NULL_IF_CONFIG_SMALL("Dynamic Adaptive Streaming over HTTP"),
    .p.priv_class   = &dash_class,
    .p.flags        = AVFMT_NO_BYTE_SEEK,
    .priv_data_size = sizeof(DASHContext),
    .flags_internal = FF_INFMT_FLAG_INIT_CLEANUP,
    .read_probe     = dash_probe,
    .read_header    = dash_read_header,
    .read_packet    = dash_read_packet,
    .read_close     = dash_close,
    .read_seek      = dash_read_seek,
}

Definition at line 2558 of file dashdec.c.