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The following commit(s) were added to refs/heads/master by this push:
new cc62602d89 avcodec/vp3: report progress in coding order for flipped
images
cc62602d89 is described below
commit cc62602d8939ec8327e62384d5ab3530a80db5e6
Author: Kacper Michajłow <[email protected]>
AuthorDate: Wed Nov 4 19:54:18 2026 +0100
Commit: Kacper Michajłow <[email protected]>
CommitDate: Thu Nov 5 12:35:41 2026 +0000
avcodec/vp3: report progress in coding order for flipped images
render_slice() and await_reference_row() count rows in coding order for
both image orientations, but vp3_draw_horiz_band() reported height - y
for old Theora bitstreams with a flipped image. The progress was highest
after the first slice and never reached INT_MAX, so with frame threading
the next frame read reference rows before they were decoded or waited
for them forever.
Fixes: Timeout
Fixes: clusterfuzz-testcase-minimized-fuzzer_loadfile_mkv-5633304502796288
Found-by: https://github.com/google/oss-fuzz/tree/master/projects/mpv
Signed-off-by: Kacper Michajłow <[email protected]>
---
libavcodec/vp3.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/libavcodec/vp3.c b/libavcodec/vp3.c
index 9b6b9901d8..0bf14d155e 100644
--- a/libavcodec/vp3.c
+++ b/libavcodec/vp3.c
@@ -1896,14 +1896,11 @@ static void vp3_draw_horiz_band(Vp3DecodeContext *s,
int y)
int offset[AV_NUM_DATA_POINTERS];
if (HAVE_THREADS && s->avctx->active_thread_type & FF_THREAD_FRAME) {
- int y_flipped = s->flipped_image ? s->height - y : y;
-
/* At the end of the frame, report INT_MAX instead of the height of
* the frame. This makes the other threads' ff_thread_await_progress()
* calls cheaper, because they don't have to clip their values. */
ff_progress_frame_report(&s->current_frame,
- y_flipped == s->height ? INT_MAX
- : y_flipped - 1);
+ y == s->height ? INT_MAX : y - 1);
}
if (!s->avctx->draw_horiz_band)
--
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