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ffplay: fix greenish line on the right edge with some xv sizes

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If the XV image linesize was different from the width, SDL would create an
overlay wider than the actually requested one. This causes a greenish line on
the right, because the rightmost texel is blended with unset data.  This patch
introduces a function which duplicates the rightmost texel to the unset space,
that way the blending will be done with duplicated border texels.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2012-12-07 00:44:17 +01:00
parent 1be8d0fbda
commit cf0c63d99a
1 changed files with 20 additions and 0 deletions
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20
ffplay.c
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@ -1478,6 +1478,24 @@ static void alloc_picture(VideoState *is)
SDL_UnlockMutex(is->pictq_mutex);
}
static void duplicate_right_border_pixels(SDL_Overlay *bmp) {
int i, width, height;
Uint8 *p, *maxp;
for (i = 0; i < 3; i++) {
width = bmp->w;
height = bmp->h;
if (i > 0) {
width >>= 1;
height >>= 1;
}
if (bmp->pitches[i] > width) {
maxp = bmp->pixels[i] + bmp->pitches[i] * height - 1;
for (p = bmp->pixels[i] + width - 1; p < maxp; p += bmp->pitches[i])
*(p+1) = *p;
}
}
}
static int queue_picture(VideoState *is, AVFrame *src_frame, double pts1, int64_t pos, int serial)
{
VideoPicture *vp;
@ -1593,6 +1611,8 @@ static int queue_picture(VideoState *is, AVFrame *src_frame, double pts1, int64_
sws_scale(is->img_convert_ctx, src_frame->data, src_frame->linesize,
0, vp->height, pict.data, pict.linesize);
#endif
/* workaround SDL PITCH_WORKAROUND */
duplicate_right_border_pixels(vp->bmp);
/* update the bitmap content */
SDL_UnlockYUVOverlay(vp->bmp);