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mpv/demux/timeline.h
wm4 c92c08edc6 edl: add mechanism for delay loading streams
Add something that will access an URL embedded in EDL only when the
track it corresponds to is actually selected. This is meant to help with
ytdl_hook.lua and to improve loading speeds.

In theory, all this stuff is available to any mpv user, but discourage
using it, as it's so specialized towards ytdl_hook.lua, that there's
danger we'll just break this once ytdl_hook.lua stops using it, or
similar.

Mostly untested.
2020-02-15 18:29:44 +01:00

70 lines
2.1 KiB
C

#ifndef MP_TIMELINE_H_
#define MP_TIMELINE_H_
#include "common/common.h"
// Single segment in a timeline.
struct timeline_part {
// (end time must match with start time of the next part)
double start, end;
double source_start;
char *url;
struct demuxer *source;
};
// Timeline formed by a single demuxer. Multiple pars are used to get tracks
// that require a separate opened demuxer, such as separate audio tracks. (For
// example, for ordered chapters there is only a single par, because all streams
// demux from the same file at a given time, while for DASH-style video+audio,
// each track would have its own timeline.)
// Note that demuxer instances must not be shared across timeline_pars. This
// would conflict in demux_timeline.c.
// "par" is short for parallel stream.
struct timeline_par {
bstr init_fragment;
bool dash, no_clip, delay_open;
// If non-NULL, _some_ fields are used. If delay_open==true, this must be
// set, and the codec info is used.
struct sh_stream *sh_meta;
// Segments to play, ordered by time.
struct timeline_part *parts;
int num_parts;
// Which source defines the overall track list (over the full timeline).
struct demuxer *track_layout;
};
struct timeline {
struct mpv_global *global;
struct mp_log *log;
struct mp_cancel *cancel;
bool is_network, is_streaming;
int stream_origin;
const char *format;
// main source, and all other sources (this usually only has special meaning
// for memory management; mostly compensates for the lack of refcounting)
struct demuxer *demuxer;
struct demuxer **sources;
int num_sources;
// Description of timeline ranges, possibly multiple parallel ones.
struct timeline_par **pars;
int num_pars;
struct demux_chapter *chapters;
int num_chapters;
// global tags, attachments, editions
struct demuxer *meta;
};
struct timeline *timeline_load(struct mpv_global *global, struct mp_log *log,
struct demuxer *demuxer);
void timeline_destroy(struct timeline *tl);
#endif