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avfilter: Deduplicate default audio inputs/outputs

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Lots of audio filters use very simple inputs or outputs:
An array with a single AVFilterPad whose name is "default"
and whose type is AVMEDIA_TYPE_AUDIO; everything else is unset.

Given that we never use pointer equality for inputs or outputs*,
we can simply use a single AVFilterPad instead of dozens; this
even saves .data.rel.ro (4784B here) as well as relocations.

*: In fact, several filters (like the filters in af_biquads.c)
already use the same inputs; furthermore, ff_filter_alloc()
duplicates the input and output pads so that we do not even
work with the pads directly.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
This commit is contained in:
Andreas Rheinhardt 2023-08-03 00:59:02 +02:00
parent 6b82f35041
commit 50ea7389ec
85 changed files with 114 additions and 710 deletions
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9
libavfilter/af_rubberband.c
View file

@ -207,13 +207,6 @@ static const AVFilterPad rubberband_inputs[] = {
},
};
static const AVFilterPad rubberband_outputs[] = {
{
.name = "default",
.type = AVMEDIA_TYPE_AUDIO,
},
};
const AVFilter ff_af_rubberband = {
.name = "rubberband",
.description = NULL_IF_CONFIG_SMALL("Apply time-stretching and pitch-shifting."),
@ -222,7 +215,7 @@ const AVFilter ff_af_rubberband = {
.uninit = uninit,
.activate = activate,
FILTER_INPUTS(rubberband_inputs),
FILTER_OUTPUTS(rubberband_outputs),
FILTER_OUTPUTS(ff_audio_default_filterpad),
FILTER_SINGLE_SAMPLEFMT(AV_SAMPLE_FMT_FLTP),
.process_command = process_command,
};