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ffplay: add support for rendering yuv images with negative line size

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Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2017-08-05 22:15:10 +02:00
parent f357104866
commit 493f637d1e
1 changed files with 10 additions and 5 deletions
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15
ffplay.c
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@ -859,13 +859,18 @@ static int upload_texture(SDL_Texture *tex, AVFrame *frame, struct SwsContext **
int ret = 0; int ret = 0;
switch (frame->format) { switch (frame->format) {
case AV_PIX_FMT_YUV420P: case AV_PIX_FMT_YUV420P:
if (frame->linesize[0] < 0 || frame->linesize[1] < 0 || frame->linesize[2] < 0) { if (frame->linesize[0] > 0 && frame->linesize[1] > 0 && frame->linesize[2] > 0) {
av_log(NULL, AV_LOG_ERROR, "Negative linesize is not supported for YUV.\n"); ret = SDL_UpdateYUVTexture(tex, NULL, frame->data[0], frame->linesize[0],
frame->data[1], frame->linesize[1],
frame->data[2], frame->linesize[2]);
} else if (frame->linesize[0] < 0 && frame->linesize[1] < 0 && frame->linesize[2] < 0) {
ret = SDL_UpdateYUVTexture(tex, NULL, frame->data[0] + frame->linesize[0] * (frame->height - 1), -frame->linesize[0],
frame->data[1] + frame->linesize[1] * (AV_CEIL_RSHIFT(frame->height, 1) - 1), -frame->linesize[1],
frame->data[2] + frame->linesize[2] * (AV_CEIL_RSHIFT(frame->height, 1) - 1), -frame->linesize[2]);
} else {
av_log(NULL, AV_LOG_ERROR, "Mixed negative and positive linesizes are not supported.\n");
return -1; return -1;
} }
ret = SDL_UpdateYUVTexture(tex, NULL, frame->data[0], frame->linesize[0],
frame->data[1], frame->linesize[1],
frame->data[2], frame->linesize[2]);
break; break;
case AV_PIX_FMT_BGRA: case AV_PIX_FMT_BGRA:
if (frame->linesize[0] < 0) { if (frame->linesize[0] < 0) {