dashdec.c File Reference

#include <libxml/parser.h>
#include <time.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	OFFSET(x)   offsetof(DASHContext, x)
#define	FLAGS   AV_OPT_FLAG_DECODING_PARAM

Functions
static int	ishttp (char *url)
static int	aligned (int val)
static uint64_t	get_current_time_in_sec (void)
static uint64_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 (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 35 of file dashdec.c.

OFFSET

#define OFFSET

(

x

)

offsetof(DASHContext, x)

Definition at line 2341 of file dashdec.c.

FLAGS

#define FLAGS   AV_OPT_FLAG_DECODING_PARAM

Definition at line 2342 of file dashdec.c.

Function Documentation

ishttp()

static int ishttp ( char *  url )

static

Definition at line 165 of file dashdec.c.

Referenced by resolve_content_path().

aligned()

static int aligned ( int  val )

static

Definition at line 171 of file dashdec.c.

Referenced by av_pixelutils_get_sad_fn(), 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_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(), mjpeg_decode_app(), parse_manifest_representation(), realign_frame(), and resolve_content_path().

get_current_time_in_sec()

static uint64_t get_current_time_in_sec ( void  )

static

Definition at line 176 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 uint64_t get_utc_date_time_insec ( AVFormatContext *  s, const char *  datetime  )

static

Definition at line 181 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 211 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 255 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 290 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 320 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 329 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 340 of file dashdec.c.

Referenced by free_representation(), and move_timelines().

free_representation()

static void free_representation ( struct representation *  pls )

static

Definition at line 351 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 371 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 382 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 393 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 404 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 471 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 522 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 538 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 555 of file dashdec.c.

Referenced by parse_manifest_representation().

get_fragment()

static struct fragment* get_fragment ( char *  range )

static

Definition at line 581 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 599 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 665 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 706 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 825 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 1104 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 1117 of file dashdec.c.

Referenced by parse_manifest().

parse_programinformation()

static int parse_programinformation ( AVFormatContext *  s, xmlNodePtr  node  )

static

Definition at line 1173 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 1202 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 1376 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 1414 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 1428 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 1454 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 1468 of file dashdec.c.

Referenced by refresh_manifest().

refresh_manifest()

static int refresh_manifest ( AVFormatContext *  s )

static

Definition at line 1486 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 1585 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 1668 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 1684 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 1716 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 1762 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 1772 of file dashdec.c.

Referenced by pulse_read_packet(), reopen_demux_for_component(), and tls_client_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 1835 of file dashdec.c.

Referenced by reopen_demux_for_component().

close_demux_for_component()

static void close_demux_for_component ( struct representation *  pls )

static

Definition at line 1845 of file dashdec.c.

Referenced by 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 1854 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 1929 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 1965 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 1992 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 2007 of file dashdec.c.

Referenced by dash_read_header().

dash_read_header()

static int dash_read_header ( AVFormatContext *  s )

static

Definition at line 2015 of file dashdec.c.

recheck_discard_flags()

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

static

Definition at line 2131 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 2156 of file dashdec.c.

dash_close()

static int dash_close ( AVFormatContext *  s )

static

Definition at line 2219 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 2230 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 2294 of file dashdec.c.

dash_probe()

static int dash_probe ( const AVProbeData *  p )

static

Definition at line 2322 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 decryption key (hex)", OFFSET(cenc_decryption_key), AV_OPT_TYPE_STRING, {.str = NULL}, INT_MIN, INT_MAX, .flags = FLAGS },
    {NULL}
}

Definition at line 2343 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 2352 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 2359 of file dashdec.c.