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Code Issues Releases Activity

lavfi/vflip: use FF_CEIL_RSHIFT for chroma w/h rounding.

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This commit is contained in:
Clément Bœsch 2013-05-11 01:06:53 +02:00
parent 59d33eafd1
commit 60f0e30431
1 changed files with 4 additions and 2 deletions
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6
libavfilter/vf_vflip.c
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@ -55,9 +55,10 @@ static AVFrame *get_video_buffer(AVFilterLink *link, int w, int h)
for (i = 0; i < 4; i ++) { for (i = 0; i < 4; i ++) {
int vsub = i == 1 || i == 2 ? flip->vsub : 0; int vsub = i == 1 || i == 2 ? flip->vsub : 0;
int height = FF_CEIL_RSHIFT(h, vsub);
if (frame->data[i]) { if (frame->data[i]) {
frame->data[i] += (((h + (1<<vsub) - 1) >> vsub) - 1) * frame->linesize[i]; frame->data[i] += (height - 1) * frame->linesize[i];
frame->linesize[i] = -frame->linesize[i]; frame->linesize[i] = -frame->linesize[i];
} }
} }
@ -72,9 +73,10 @@ static int filter_frame(AVFilterLink *link, AVFrame *frame)
for (i = 0; i < 4; i ++) { for (i = 0; i < 4; i ++) {
int vsub = i == 1 || i == 2 ? flip->vsub : 0; int vsub = i == 1 || i == 2 ? flip->vsub : 0;
int height = FF_CEIL_RSHIFT(link->h, vsub);
if (frame->data[i]) { if (frame->data[i]) {
frame->data[i] += (((link->h + (1<<vsub)-1)>> vsub)-1) * frame->linesize[i]; frame->data[i] += (height - 1) * frame->linesize[i];
frame->linesize[i] = -frame->linesize[i]; frame->linesize[i] = -frame->linesize[i];
} }
} }