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libavfilter/vf_owdenoise.c: skip processing when strength is 0 

It is practical to de-noise only on luma while keeping chroma unchanged.

However, libavfilter/vf_owdenoise.c always do the Wavelet transform/retransform on all 3 channels without check whether chroma_strength is 0.

Thus I make this patch. De-noise on Y only for yuv420 is now 1.5 times faster.

Signed-off-by: Yuuki Galaxy <galaxy001@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Yuuki Galaxy 2016-04-12 22:53:58 +08:00 committed by Michael Niedermayer
parent ac07e57c39
commit af5419f91b
1 changed files with 19 additions and 7 deletions
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20
libavfilter/vf_owdenoise.c
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@ -222,7 +222,6 @@ static void filter(OWDenoiseContext *s,
static int filter_frame(AVFilterLink *inlink, AVFrame *in)
{
int direct = 0;
AVFilterContext *ctx = inlink->dst;
OWDenoiseContext *s = ctx->priv;
AVFilterLink *outlink = ctx->outputs[0];
@ -231,8 +230,14 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
const int ch = AV_CEIL_RSHIFT(inlink->h, s->vsub);
if (av_frame_is_writable(in)) {
direct = 1;
out = in;
if (s->luma_strength > 0)
filter(s, out->data[0], out->linesize[0], in->data[0], in->linesize[0], inlink->w, inlink->h, s->luma_strength);
if (s->chroma_strength > 0) {
filter(s, out->data[1], out->linesize[1], in->data[1], in->linesize[1], cw, ch, s->chroma_strength);
filter(s, out->data[2], out->linesize[2], in->data[2], in->linesize[2], cw, ch, s->chroma_strength);
}
} else {
out = ff_get_video_buffer(outlink, outlink->w, outlink->h);
if (!out) {
@ -240,13 +245,20 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *in)
return AVERROR(ENOMEM);
}
av_frame_copy_props(out, in);
}
if (s->luma_strength > 0) {
filter(s, out->data[0], out->linesize[0], in->data[0], in->linesize[0], inlink->w, inlink->h, s->luma_strength);
} else {
av_image_copy_plane(out->data[0], out->linesize[0], in ->data[0], in ->linesize[0], inlink->w, inlink->h);
}
if (s->chroma_strength > 0) {
filter(s, out->data[1], out->linesize[1], in->data[1], in->linesize[1], cw, ch, s->chroma_strength);
filter(s, out->data[2], out->linesize[2], in->data[2], in->linesize[2], cw, ch, s->chroma_strength);
} else {
av_image_copy_plane(out->data[1], out->linesize[1], in ->data[1], in ->linesize[1], inlink->w, inlink->h);
av_image_copy_plane(out->data[2], out->linesize[2], in ->data[2], in ->linesize[2], inlink->w, inlink->h);
}
if (!direct) {
if (in->data[3])
av_image_copy_plane(out->data[3], out->linesize[3],
in ->data[3], in ->linesize[3],