PR #22996 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22996 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/22996.patch
Fixes: write into the padding area of the frame Found-by: Marius Momeu <[email protected]> Signed-off-by: Michael Niedermayer <[email protected]> >From b009e72615990ba7e11adbdc1f7351db68714427 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer <[email protected]> Date: Sat, 2 May 2026 12:22:34 +0200 Subject: [PATCH] avfilter/vf_codecview: Clamp block to the visible frame region Fixes: write into the padding area of the frame Found-by: Marius Momeu <[email protected]> Signed-off-by: Michael Niedermayer <[email protected]> --- libavfilter/vf_codecview.c | 17 +++++++++++++++-- 1 file changed, 15 insertions(+), 2 deletions(-) diff --git a/libavfilter/vf_codecview.c b/libavfilter/vf_codecview.c index a4a701b00c..f20056b91b 100644 --- a/libavfilter/vf_codecview.c +++ b/libavfilter/vf_codecview.c @@ -266,9 +266,22 @@ static int filter_frame(AVFilterLink *inlink, AVFrame *frame) if (par->nb_blocks) { for (int block_idx = 0; block_idx < par->nb_blocks; block_idx++) { AVVideoBlockParams *b = av_video_enc_params_block(par, block_idx); - uint8_t *buf = frame->data[0] + b->src_y * stride; - draw_block_rectangle(buf, b->src_x, b->src_y, b->w, b->h, stride, 100); + int64_t x0 = b->src_x; + int64_t y0 = b->src_y; + int64_t x1 = x0 + b->w; + int64_t y1 = y0 + b->h; + + x0 = FFMAX(x0, 0); + y0 = FFMAX(y0, 0); + x1 = FFMIN(x1, frame->width); + y1 = FFMIN(y1, frame->height); + + if (x1 <= x0 || y1 <= y0) + continue; + + uint8_t *buf = frame->data[0] + y0 * stride; + draw_block_rectangle(buf, x0, y0, x1-x0, y1-y0, stride, 100); } } } -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- [email protected] To unsubscribe send an email to [email protected]
