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Code Issues Releases Activity

lavfi/framesync: avoid forcing frame writability unnecessarily

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Callers of ff_framesync_get_frame() generally do not expect the result
to be writable, those that do (e.g. ff_framesync_dualinput_get_writable())
ensure writability themselves.

Significantly reduces memory consumption in complex graphs with
framesync-based filters (e.g. scale, ssim).

Reported-By: Mark Shwartzman
This commit is contained in:
Anton Khirnov
2024-07-24 17:10:41 +02:00
parent 262168b04e
commit 43f702a253
1 changed files with 0 additions and 5 deletions
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5
libavfilter/framesync.c
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@@ -273,7 +273,6 @@ int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe,
AVFrame *frame;
unsigned need_copy = 0, i;
int64_t pts_next;
int ret;
if (!fs->in[in].frame) {
*rframe = NULL;
@@ -291,10 +290,6 @@ int ff_framesync_get_frame(FFFrameSync *fs, unsigned in, AVFrame **rframe,
if (need_copy) {
if (!(frame = av_frame_clone(frame)))
return AVERROR(ENOMEM);
if ((ret = ff_inlink_make_frame_writable(fs->parent->inputs[in], &frame)) < 0) {
av_frame_free(&frame);
return ret;
}
} else {
fs->in[in].frame = NULL;
}