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command: with lavfi-complex, make current-tracks return the first one 

This behavior is more convenient and allows profile conditions like:

[video]
profile-cond=get('current-tracks/video/image') == false

[image]
profile-cond=get('current-tracks/video/image')

Otherwise, these profiles have to be manually applied and restored in a
script.

The note about discouraging the use of current-tracks in scripts is
removed, because it makes people avoid using this convenient property.
It was added in 720bcd79d0 without leaving an explanation of why you
shouldn't use it, and the only reason seems to be that it doesn't work
with lavfi-complex, but this commit changes that.
This commit is contained in:
Guido Cella 2021-09-15 21:33:47 +02:00 committed by Dudemanguy
parent 9954fe01a9
commit e16d0dd15d
2 changed files with 12 additions and 9 deletions
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11
DOCS/man/input.rst
View File

@ -2976,15 +2976,8 @@ Property list
For example, ``current-tracks/audio/lang`` returns the current audio track's
language field (the same value as ``track-list/N/lang``).
A sub-entry is accessible only if a track of that type is actually selected.
Tracks selected via ``--lavfi-complex`` never appear under this property.
``current-tracks`` and ``current-tracks/`` are currently not accessible, and
will not return anything.
Scripts etc. should not use this. They should use ``track-list``, loop over
all tracks, and inspect the ``selected`` field to test whether a track is
selected (or compare the ``id`` field to the ``video`` / ``audio`` etc.
options).
If tracks of the requested type are selected via ``--lavfi-complex``, the
first one is returned.
``chapter-list``
List of chapters, current entry marked. Currently, the raw property value

10
player/command.c
View File

@ -2076,6 +2076,16 @@ static int property_current_tracks(void *ctx, struct m_property *prop,
return M_PROPERTY_UNKNOWN;
struct track *t = mpctx->current_track[order][type];
if (!t && mpctx->lavfi) {
for (int n = 0; n < mpctx->num_tracks; n++) {
if (mpctx->tracks[n]->type == type && mpctx->tracks[n]->selected) {
t = mpctx->tracks[n];
break;
}
}
}
if (!t)
return M_PROPERTY_UNAVAILABLE;