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player: add on_preloaded hook

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(Limited usefulness.)
This commit is contained in:
wm4 2016-02-15 16:19:19 +01:00
parent b7034db4af
commit 39ab426f05
2 changed files with 27 additions and 0 deletions
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11
DOCS/man/input.rst
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@ -765,6 +765,17 @@ The following hooks are currently defined:
``file-local-options/<option name>``. The player will wait until all
hooks are run.
``on_preloaded``
Called after a file has been opened, and before tracks are selected and
decoders are created. This has some usefulness if an API users wants
to select tracks manually, based on the set of available tracks. It's
also useful to initialize ``--lavfi-complex`` in a specific way by API,
without having to "probe" the available streams at first.
Note that this does not yet apply default track selection. Which operations
exactly can be done and not be done, and what information is available and
what is not yet available yet, is all subject to change.
``on_unload``
Run before closing a file, and before actually uninitializing
everything. It's not possible to resume playback in this state.

16
player/loadfile.c
View File

@ -871,6 +871,19 @@ static int process_open_hooks(struct MPContext *mpctx)
return 0;
}
static int process_preloaded_hooks(struct MPContext *mpctx)
{
mp_hook_run(mpctx, NULL, "on_preloaded");
while (!mp_hook_test_completion(mpctx, "on_preloaded")) {
mp_idle(mpctx);
if (mpctx->stop_play)
return -1;
}
return 0;
}
static void process_unload_hooks(struct MPContext *mpctx)
{
mp_hook_run(mpctx, NULL, "on_unload");
@ -1256,6 +1269,9 @@ reopen_file:
check_previous_track_selection(mpctx);
if (process_preloaded_hooks(mpctx))
goto terminate_playback;
if (!init_complex_filters(mpctx))
goto terminate_playback;