From: "Zsolt Vadász via ffmpeg-devel" <ffmpeg-devel@ffmpeg.org>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Cc: "Zsolt Vadász" <zsolt_vadasz@protonmail.com>
Subject: [FFmpeg-devel] [PATCH 1/2] libavfilter/vf_minterpolate: Hoist hot loop in `set_frame_data`
Date: Fri, 29 Aug 2025 20:19:47 +0000
Message-ID: <-bW6jmQQSuGIZXDUmE8tnqn_TU1c-wo1WbKGAytFLIpE3oHFbeXNhoVAfr7U1ioIbeO7HVb_W52Ib9rccz1l5_rUWw-VZtdVyIcKnwv3kDY=@protonmail.com> (raw)
Signed-off-by: Zsolt Vadasz <zsolt_vadasz@protonmail.com>
---
libavfilter/vf_minterpolate.c | 15 +++++++++------
1 file changed, 9 insertions(+), 6 deletions(-)
diff --git a/libavfilter/vf_minterpolate.c b/libavfilter/vf_minterpolate.c
index d034783bc5..2406259056 100644
--- a/libavfilter/vf_minterpolate.c
+++ b/libavfilter/vf_minterpolate.c
@@ -939,17 +939,20 @@ static void set_frame_data(MIContext *mi_ctx, int alpha, AVFrame *avf_out)
weight_sum = ALPHA_MAX;
}
- for (i = 0; i < pixel_refs->nb; i++) {
- Frame *frame = &mi_ctx->frames[pixel_refs->refs[i]];
- if (chroma) {
+ if (chroma) {
+ for (i = 0; i < pixel_refs->nb; i++) {
+ Frame *frame = &mi_ctx->frames[pixel_refs->refs[i]];
x_mv = (x >> mi_ctx->log2_chroma_w) + pixel_mvs->mvs[i][0] / (1 << mi_ctx->log2_chroma_w);
y_mv = (y >> mi_ctx->log2_chroma_h) + pixel_mvs->mvs[i][1] / (1 << mi_ctx->log2_chroma_h);
- } else {
+ val += pixel_weights->weights[i] * frame->avf->data[plane][x_mv + y_mv * frame->avf->linesize[plane]];
+ }
+ } else {
+ for (i = 0; i < pixel_refs->nb; i++) {
+ Frame *frame = &mi_ctx->frames[pixel_refs->refs[i]];
x_mv = x + pixel_mvs->mvs[i][0];
y_mv = y + pixel_mvs->mvs[i][1];
+ val += pixel_weights->weights[i] * frame->avf->data[plane][x_mv + y_mv * frame->avf->linesize[plane]];
}
-
- val += pixel_weights->weights[i] * frame->avf->data[plane][x_mv + y_mv * frame->avf->linesize[plane]];
}
val = ROUNDED_DIV(val, weight_sum);
--
2.51.0
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