Am So., 14. Feb. 2021 um 17:10 Uhr schrieb Paul B Mahol <one...@gmail.com>:
>
> Signed-off-by: Paul B Mahol <one...@gmail.com>
> ---
> libavcodec/pngdec.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
>
> diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
> index 61642b7cbe..f0e2a0cad4 100644
> --- a/libavcodec/pngdec.c
> +++ b/libavcodec/pngdec.c
> @@ -1090,8 +1090,8 @@ static int handle_p_frame_apng(AVCodecContext *avctx,
> PNGDecContext *s,
>
>
> // Do the disposal operation specified by the last frame on the frame
> + ff_thread_await_progress(&s->last_picture, INT_MAX, 0);
> if (s->last_dispose_op != APNG_DISPOSE_OP_PREVIOUS) {
> - ff_thread_await_progress(&s->last_picture, INT_MAX, 0);
> memcpy(buffer, s->last_picture.f->data[0], s->image_linesize *
> s->height);
>
> if (s->last_dispose_op == APNG_DISPOSE_OP_BACKGROUND)
> @@ -1101,8 +1101,7 @@ static int handle_p_frame_apng(AVCodecContext *avctx,
> PNGDecContext *s,
> memcpy(s->previous_picture.f->data[0], buffer, s->image_linesize *
> s->height);
> ff_thread_report_progress(&s->previous_picture, INT_MAX, 0);
> } else {
> - ff_thread_await_progress(&s->previous_picture, INT_MAX, 0);
> - memcpy(buffer, s->previous_picture.f->data[0], s->image_linesize *
> s->height);
> + memcpy(buffer, s->last_picture.f->data[0], s->image_linesize *
> s->height);
Please mention ticket #9017, there is no way to understand where this
comes from.
Thank you for looking into this, Carl Eugen
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