It makes sense when copying 4K/8K video frame, got 2.7% speed up.
When the condition is no padding and src_linesize equals to dst,
we could copy plane instead of line by line.
before after rate
4K video:
9145 8998 1.6%
9804 9465 3.4%
9645 9394 2.6%
8K video:
28411 27718 2.4%
31288 30056 3.9%
32336 31571 2.4%
Signed-off-by: xufuji456 <839789...@qq.com>
---
libavutil/imgutils.c | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/libavutil/imgutils.c b/libavutil/imgutils.c
index 9ab5757cf6..f5898756ba 100644
--- a/libavutil/imgutils.c
+++ b/libavutil/imgutils.c
@@ -525,10 +525,18 @@ int av_image_copy_to_buffer(uint8_t *dst, int dst_size,
const uint8_t *src = src_data[i];
h = (height + (1 << shift) - 1) >> shift;
- for (j = 0; j < h; j++) {
- memcpy(dst, src, linesize[i]);
- dst += FFALIGN(linesize[i], align);
- src += src_linesize[i];
+ // When src's linesize equals to dst, we could copy plane directly
+ if (src_linesize[i] == linesize[i] && FFALIGN(linesize[i], align) ==
linesize[i]) {
+ int len = linesize[i] * h;
+ memcpy(dst, src, len);
+ dst += len;
+ src += len;
+ } else {
+ for (j = 0; j < h; j++) {
+ memcpy(dst, src, linesize[i]);
+ dst += FFALIGN(linesize[i], align);
+ src += src_linesize[i];
+ }
}
}
--
2.32.0 (Apple Git-132)
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