RepoMirrors/mpv
1
0
Fork 0
mirror of https://github.com/mpv-player/mpv synced 2024-12-24 07:42:17 +00:00
Code Issues Releases Wiki Activity
0e2d4ee595
mpv/demux/timeline.h

72 lines
2.2 KiB
C
Raw Normal View History

player: use a separate context for timeline loader stuff Instead of accessing MPContext in player/timeline/*, create a separate context struct, which the timeline loaders fill out. It turns out that there's not much in the way too big MPContext that these need to access. One major PITA is managing (and closing) the set of open demuxers. The problem is that we need a list of all demuxers to make sure no unneeded streams are enabled. This adds a callback to the demuxer_desc struct, with the intention of leaving to to the demuxer to call the right loader, instead of explicitly checking the demuxer type and dispatching manually in common code. I also considered making the timeline part of the demuxer state, but decided against: it's too much of a mess wrt. memory management and threading, and also doesn't make it clear who owns the child demuxers. With the struct timeline decoupled from the demuxer state, it's at least somewhat clear that the child demuxers are independent from the "main" demuxer. The actual changes to player/timeline/* are separated in the following commits, because they're quite verbose. Some artifacts will be removed later as soon as there's only 1 timeline loading mechanism.
2015-02-17 22:46:12 +00:00
#ifndef MP_TIMELINE_H_
#define MP_TIMELINE_H_
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 17:09:28 +00:00
#include "common/common.h"
demux_edl, cue, mkv: clean up timeline stuff slightly Remove the singly linked list hack, replace it with a slightly more proper data structure. This probably gets rid of a few minor bugs along the way, caused by the awkward nonsensical sharing/duplication of some fields. Another change (because I'm touching everything related to timeline anyway) is that I'm removing the special semantics for parts[num_parts]. This is now strictly out of bounds, and instead of using the start time of the next/beyond-last part, there is an end time field now. Unfortunately, this also requires touching the code for cue and mkv ordered chapters. From some superficial testing, they still seem to mostly work. One observable change is that the "no_chapters" header is per-stream now, which is arguably more correct, and getting the old behavior would require adding code to handle it as special-case, so just adjust ytdl_hook.lua to the new behavior.
2019-01-11 12:52:29 +00:00
// Single segment in a timeline.
player: use a separate context for timeline loader stuff Instead of accessing MPContext in player/timeline/*, create a separate context struct, which the timeline loaders fill out. It turns out that there's not much in the way too big MPContext that these need to access. One major PITA is managing (and closing) the set of open demuxers. The problem is that we need a list of all demuxers to make sure no unneeded streams are enabled. This adds a callback to the demuxer_desc struct, with the intention of leaving to to the demuxer to call the right loader, instead of explicitly checking the demuxer type and dispatching manually in common code. I also considered making the timeline part of the demuxer state, but decided against: it's too much of a mess wrt. memory management and threading, and also doesn't make it clear who owns the child demuxers. With the struct timeline decoupled from the demuxer state, it's at least somewhat clear that the child demuxers are independent from the "main" demuxer. The actual changes to player/timeline/* are separated in the following commits, because they're quite verbose. Some artifacts will be removed later as soon as there's only 1 timeline loading mechanism.
2015-02-17 22:46:12 +00:00
struct timeline_part {
demux_edl, cue, mkv: clean up timeline stuff slightly Remove the singly linked list hack, replace it with a slightly more proper data structure. This probably gets rid of a few minor bugs along the way, caused by the awkward nonsensical sharing/duplication of some fields. Another change (because I'm touching everything related to timeline anyway) is that I'm removing the special semantics for parts[num_parts]. This is now strictly out of bounds, and instead of using the start time of the next/beyond-last part, there is an end time field now. Unfortunately, this also requires touching the code for cue and mkv ordered chapters. From some superficial testing, they still seem to mostly work. One observable change is that the "no_chapters" header is per-stream now, which is arguably more correct, and getting the old behavior would require adding code to handle it as special-case, so just adjust ytdl_hook.lua to the new behavior.
2019-01-11 12:52:29 +00:00
// (end time must match with start time of the next part)
double start, end;
player: use a separate context for timeline loader stuff Instead of accessing MPContext in player/timeline/*, create a separate context struct, which the timeline loaders fill out. It turns out that there's not much in the way too big MPContext that these need to access. One major PITA is managing (and closing) the set of open demuxers. The problem is that we need a list of all demuxers to make sure no unneeded streams are enabled. This adds a callback to the demuxer_desc struct, with the intention of leaving to to the demuxer to call the right loader, instead of explicitly checking the demuxer type and dispatching manually in common code. I also considered making the timeline part of the demuxer state, but decided against: it's too much of a mess wrt. memory management and threading, and also doesn't make it clear who owns the child demuxers. With the struct timeline decoupled from the demuxer state, it's at least somewhat clear that the child demuxers are independent from the "main" demuxer. The actual changes to player/timeline/* are separated in the following commits, because they're quite verbose. Some artifacts will be removed later as soon as there's only 1 timeline loading mechanism.
2015-02-17 22:46:12 +00:00
double source_start;
ytdl_hook, edl: implement pseudo-DASH support We use the metadata provided by youtube-dl to sort-of implement fragmented DASH streaming. This is all a bit hacky, but hopefully a makeshift solution until libavformat has proper mechanisms. (Although in danger of being one of those temporary hacks that become permanent.)
2017-01-30 18:38:43 +00:00
char *url;
player: use a separate context for timeline loader stuff Instead of accessing MPContext in player/timeline/*, create a separate context struct, which the timeline loaders fill out. It turns out that there's not much in the way too big MPContext that these need to access. One major PITA is managing (and closing) the set of open demuxers. The problem is that we need a list of all demuxers to make sure no unneeded streams are enabled. This adds a callback to the demuxer_desc struct, with the intention of leaving to to the demuxer to call the right loader, instead of explicitly checking the demuxer type and dispatching manually in common code. I also considered making the timeline part of the demuxer state, but decided against: it's too much of a mess wrt. memory management and threading, and also doesn't make it clear who owns the child demuxers. With the struct timeline decoupled from the demuxer state, it's at least somewhat clear that the child demuxers are independent from the "main" demuxer. The actual changes to player/timeline/* are separated in the following commits, because they're quite verbose. Some artifacts will be removed later as soon as there's only 1 timeline loading mechanism.
2015-02-17 22:46:12 +00:00
struct demuxer *source;
};
demux_edl, cue, mkv: clean up timeline stuff slightly Remove the singly linked list hack, replace it with a slightly more proper data structure. This probably gets rid of a few minor bugs along the way, caused by the awkward nonsensical sharing/duplication of some fields. Another change (because I'm touching everything related to timeline anyway) is that I'm removing the special semantics for parts[num_parts]. This is now strictly out of bounds, and instead of using the start time of the next/beyond-last part, there is an end time field now. Unfortunately, this also requires touching the code for cue and mkv ordered chapters. From some superficial testing, they still seem to mostly work. One observable change is that the "no_chapters" header is per-stream now, which is arguably more correct, and getting the old behavior would require adding code to handle it as special-case, so just adjust ytdl_hook.lua to the new behavior.
2019-01-11 12:52:29 +00:00
// 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;
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 17:09:28 +00:00
bool dash, no_clip, delay_open;
edl: make it possible to delay-load files with multiple tracks Until now, delay-loading was for files with single tracks only (basically what DASH and HLS like to expose, so adaptive streaming and codec selection becomes easier - for sites, not for us). But they also provide some interleaved versions, probably for compatibility. Until now, we were forced to eagerly load it (making startup slightly slower). But there is not much missing. We just need a way to provide multiple metadata entries, and use them to represent each track. A side effect is now that the "track_meta" header can be used for normal EDL files too.
2020-02-20 23:19:17 +00:00
// Of any of these, _some_ fields are used. If delay_open==true, this
// describes each sub-track, and the codec info is used.
// In both cases, the metadata is mapped to actual tracks in specific ways.
struct sh_stream **sh_meta;
int num_sh_meta;
demux_edl, cue, mkv: clean up timeline stuff slightly Remove the singly linked list hack, replace it with a slightly more proper data structure. This probably gets rid of a few minor bugs along the way, caused by the awkward nonsensical sharing/duplication of some fields. Another change (because I'm touching everything related to timeline anyway) is that I'm removing the special semantics for parts[num_parts]. This is now strictly out of bounds, and instead of using the start time of the next/beyond-last part, there is an end time field now. Unfortunately, this also requires touching the code for cue and mkv ordered chapters. From some superficial testing, they still seem to mostly work. One observable change is that the "no_chapters" header is per-stream now, which is arguably more correct, and getting the old behavior would require adding code to handle it as special-case, so just adjust ytdl_hook.lua to the new behavior.
2019-01-11 12:52:29 +00:00
// 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;
};
player: use a separate context for timeline loader stuff Instead of accessing MPContext in player/timeline/*, create a separate context struct, which the timeline loaders fill out. It turns out that there's not much in the way too big MPContext that these need to access. One major PITA is managing (and closing) the set of open demuxers. The problem is that we need a list of all demuxers to make sure no unneeded streams are enabled. This adds a callback to the demuxer_desc struct, with the intention of leaving to to the demuxer to call the right loader, instead of explicitly checking the demuxer type and dispatching manually in common code. I also considered making the timeline part of the demuxer state, but decided against: it's too much of a mess wrt. memory management and threading, and also doesn't make it clear who owns the child demuxers. With the struct timeline decoupled from the demuxer state, it's at least somewhat clear that the child demuxers are independent from the "main" demuxer. The actual changes to player/timeline/* are separated in the following commits, because they're quite verbose. Some artifacts will be removed later as soon as there's only 1 timeline loading mechanism.
2015-02-17 22:46:12 +00:00
struct timeline {
struct mpv_global *global;
struct mp_log *log;
demux: timeline: honor quit requests
2015-02-20 21:08:02 +00:00
struct mp_cancel *cancel;
player: use a separate context for timeline loader stuff Instead of accessing MPContext in player/timeline/*, create a separate context struct, which the timeline loaders fill out. It turns out that there's not much in the way too big MPContext that these need to access. One major PITA is managing (and closing) the set of open demuxers. The problem is that we need a list of all demuxers to make sure no unneeded streams are enabled. This adds a callback to the demuxer_desc struct, with the intention of leaving to to the demuxer to call the right loader, instead of explicitly checking the demuxer type and dispatching manually in common code. I also considered making the timeline part of the demuxer state, but decided against: it's too much of a mess wrt. memory management and threading, and also doesn't make it clear who owns the child demuxers. With the struct timeline decoupled from the demuxer state, it's at least somewhat clear that the child demuxers are independent from the "main" demuxer. The actual changes to player/timeline/* are separated in the following commits, because they're quite verbose. Some artifacts will be removed later as soon as there's only 1 timeline loading mechanism.
2015-02-17 22:46:12 +00:00
demux_timeline, demux_edl: correctly enable cache in pseudo-DASH mode In pseudo-DASH mode, we may have no real streams opened until the demuxer layer is fully loaded and playback actually starts. The only hint that the stream is from network is, at that point, the init segment, which is only opened as stream, and then separately as demuxer (which is dumb but happened to fit the internal architecture better). So just propagate the flags from the init segment stream. Seems like an annoyance, but doesn't hurt that much I guess. (Until someone gets the idea to pass the init segment data inline or so, but nothing does that.) The sample link in the linked issue will probably soon switch to another format, because that service always does this after recent uploads or so. Fixes: #7038
2019-10-08 21:55:05 +00:00
bool is_network, is_streaming;
stream, demux: redo origin policy thing mpv has a very weak and very annoying policy that determines whether a playlist should be used or not. For example, if you play a remote playlist, you usually don't want it to be able to read local filesystem entries. (Although for a media player the impact is small I guess.) It's weak and annoying as in that it does not prevent certain cases which could be interpreted as bad in some cases, such as allowing playlists on the local filesystem to reference remote URLs. It probably barely makes sense, but we just want to exclude some other "definitely not a good idea" things, all while playlists generally just work, so whatever. The policy is: - from the command line anything is played - local playlists can reference anything except "unsafe" streams ("unsafe" means special stream inputs like libavfilter graphs) - remote playlists can reference only remote URLs - things like "memory://" and archives are "transparent" to this This commit does... something. It replaces the weird stream flags with a slightly clearer "origin" value, which is now consequently passed down and used everywhere. It fixes some deviations from the described policy. I wanted to force archives to reference only content within them, but this would probably have been more complicated (or required different abstractions), and I'm too lazy to figure it out, so archives are now "transparent" (playlists within archives behave the same outside). There may be a lot of bugs in this. This is unfortunately a very noisy commit because: - every stream open call now needs to pass the origin - so does every demuxer open call (=> params param. gets mandatory) - most stream were changed to provide the "origin" value - the origin value needed to be passed along in a lot of places - I was too lazy to split the commit Fixes: #7274
2019-12-20 08:41:42 +00:00
int stream_origin;
demux_edl, cue, mkv: slightly nicer file format indication Instead of just using "edl/" for the file format, report mkv_oc if it's generated from ordered chapters, "cue/" if from .cue, "multi/" if it's from EDL but only for adding separate streams, "dash/" if it's from EDL but only using the DASH hack, and "edl/" for everything else. The EDL variants are mostly special-cased to the variants the ytdl wrapper usually generates. This has no effect other than what the command.c file-format property returns.
2019-01-11 13:10:41 +00:00
const char *format;
demux_edl, cue, mkv: clean up timeline stuff slightly Remove the singly linked list hack, replace it with a slightly more proper data structure. This probably gets rid of a few minor bugs along the way, caused by the awkward nonsensical sharing/duplication of some fields. Another change (because I'm touching everything related to timeline anyway) is that I'm removing the special semantics for parts[num_parts]. This is now strictly out of bounds, and instead of using the start time of the next/beyond-last part, there is an end time field now. Unfortunately, this also requires touching the code for cue and mkv ordered chapters. From some superficial testing, they still seem to mostly work. One observable change is that the "no_chapters" header is per-stream now, which is arguably more correct, and getting the old behavior would require adding code to handle it as special-case, so just adjust ytdl_hook.lua to the new behavior.
2019-01-11 12:52:29 +00:00
// main source, and all other sources (this usually only has special meaning
// for memory management; mostly compensates for the lack of refcounting)
player: use a separate context for timeline loader stuff Instead of accessing MPContext in player/timeline/*, create a separate context struct, which the timeline loaders fill out. It turns out that there's not much in the way too big MPContext that these need to access. One major PITA is managing (and closing) the set of open demuxers. The problem is that we need a list of all demuxers to make sure no unneeded streams are enabled. This adds a callback to the demuxer_desc struct, with the intention of leaving to to the demuxer to call the right loader, instead of explicitly checking the demuxer type and dispatching manually in common code. I also considered making the timeline part of the demuxer state, but decided against: it's too much of a mess wrt. memory management and threading, and also doesn't make it clear who owns the child demuxers. With the struct timeline decoupled from the demuxer state, it's at least somewhat clear that the child demuxers are independent from the "main" demuxer. The actual changes to player/timeline/* are separated in the following commits, because they're quite verbose. Some artifacts will be removed later as soon as there's only 1 timeline loading mechanism.
2015-02-17 22:46:12 +00:00
struct demuxer *demuxer;
struct demuxer **sources;
int num_sources;
demux_edl, cue, mkv: clean up timeline stuff slightly Remove the singly linked list hack, replace it with a slightly more proper data structure. This probably gets rid of a few minor bugs along the way, caused by the awkward nonsensical sharing/duplication of some fields. Another change (because I'm touching everything related to timeline anyway) is that I'm removing the special semantics for parts[num_parts]. This is now strictly out of bounds, and instead of using the start time of the next/beyond-last part, there is an end time field now. Unfortunately, this also requires touching the code for cue and mkv ordered chapters. From some superficial testing, they still seem to mostly work. One observable change is that the "no_chapters" header is per-stream now, which is arguably more correct, and getting the old behavior would require adding code to handle it as special-case, so just adjust ytdl_hook.lua to the new behavior.
2019-01-11 12:52:29 +00:00
// Description of timeline ranges, possibly multiple parallel ones.
struct timeline_par **pars;
int num_pars;
player: use a separate context for timeline loader stuff Instead of accessing MPContext in player/timeline/*, create a separate context struct, which the timeline loaders fill out. It turns out that there's not much in the way too big MPContext that these need to access. One major PITA is managing (and closing) the set of open demuxers. The problem is that we need a list of all demuxers to make sure no unneeded streams are enabled. This adds a callback to the demuxer_desc struct, with the intention of leaving to to the demuxer to call the right loader, instead of explicitly checking the demuxer type and dispatching manually in common code. I also considered making the timeline part of the demuxer state, but decided against: it's too much of a mess wrt. memory management and threading, and also doesn't make it clear who owns the child demuxers. With the struct timeline decoupled from the demuxer state, it's at least somewhat clear that the child demuxers are independent from the "main" demuxer. The actual changes to player/timeline/* are separated in the following commits, because they're quite verbose. Some artifacts will be removed later as soon as there's only 1 timeline loading mechanism.
2015-02-17 22:46:12 +00:00
struct demux_chapter *chapters;
int num_chapters;
demux_edl, cue, mkv: clean up timeline stuff slightly Remove the singly linked list hack, replace it with a slightly more proper data structure. This probably gets rid of a few minor bugs along the way, caused by the awkward nonsensical sharing/duplication of some fields. Another change (because I'm touching everything related to timeline anyway) is that I'm removing the special semantics for parts[num_parts]. This is now strictly out of bounds, and instead of using the start time of the next/beyond-last part, there is an end time field now. Unfortunately, this also requires touching the code for cue and mkv ordered chapters. From some superficial testing, they still seem to mostly work. One observable change is that the "no_chapters" header is per-stream now, which is arguably more correct, and getting the old behavior would require adding code to handle it as special-case, so just adjust ytdl_hook.lua to the new behavior.
2019-01-11 12:52:29 +00:00
// global tags, attachments, editions
struct demuxer *meta;
player: use a separate context for timeline loader stuff Instead of accessing MPContext in player/timeline/*, create a separate context struct, which the timeline loaders fill out. It turns out that there's not much in the way too big MPContext that these need to access. One major PITA is managing (and closing) the set of open demuxers. The problem is that we need a list of all demuxers to make sure no unneeded streams are enabled. This adds a callback to the demuxer_desc struct, with the intention of leaving to to the demuxer to call the right loader, instead of explicitly checking the demuxer type and dispatching manually in common code. I also considered making the timeline part of the demuxer state, but decided against: it's too much of a mess wrt. memory management and threading, and also doesn't make it clear who owns the child demuxers. With the struct timeline decoupled from the demuxer state, it's at least somewhat clear that the child demuxers are independent from the "main" demuxer. The actual changes to player/timeline/* are separated in the following commits, because they're quite verbose. Some artifacts will be removed later as soon as there's only 1 timeline loading mechanism.
2015-02-17 22:46:12 +00:00
};
struct timeline *timeline_load(struct mpv_global *global, struct mp_log *log,
struct demuxer *demuxer);
void timeline_destroy(struct timeline *tl);
#endif
Reference in New Issue Copy Permalink