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no-senders; approved; loop; banned-address; header-match-ffmpeg-devel.ffmpeg.org-0; header-match-ffmpeg-devel.ffmpeg.org-1; header-match-ffmpeg-devel.ffmpeg.org-2; header-match-ffmpeg-devel.ffmpeg.org-3; emergency; member-moderation X-Mailman-Version: 3.3.10 Precedence: list Reply-To: FFmpeg development discussions and patches Subject: [FFmpeg-devel] [PR] avcodec/snowdec: fix mconly (PR #21792) List-Id: FFmpeg development discussions and patches Archived-At: Archived-At: List-Archive: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: From: michaelni via ffmpeg-devel Cc: michaelni Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Archived-At: List-Archive: List-Post: PR #21792 opened by michaelni URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21792 Patch URL: https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/21792.patch Signed-off-by: Michael Niedermayer >>From 30ca22ed8bd12488fd2becc7aefe1970b0d2845a Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Thu, 19 Feb 2026 03:19:34 +0100 Subject: [PATCH] avcodec/snowdec: fix mconly Signed-off-by: Michael Niedermayer --- libavcodec/snow.c | 4 ++-- libavcodec/snowdec.c | 9 ++++----- 2 files changed, 6 insertions(+), 7 deletions(-) diff --git a/libavcodec/snow.c b/libavcodec/snow.c index 006d84d8ce..0fffc25424 100644 --- a/libavcodec/snow.c +++ b/libavcodec/snow.c @@ -541,8 +541,8 @@ int ff_snow_common_init_after_header(AVCodecContext *avctx) { if(!s->scratchbuf) { int emu_buf_size; - emu_buf_size = FFMAX(s->mconly_picture->linesize[0], 2*avctx->width+256) * (2 * MB_SIZE + HTAPS_MAX - 1); - if (!FF_ALLOCZ_TYPED_ARRAY(s->scratchbuf, FFMAX(s->mconly_picture->linesize[0], 2*avctx->width+256) * 7 * MB_SIZE) || + emu_buf_size = FFMAX(s->current_picture->linesize[0], 2*avctx->width+256) * (2 * MB_SIZE + HTAPS_MAX - 1); + if (!FF_ALLOCZ_TYPED_ARRAY(s->scratchbuf, FFMAX(s->current_picture->linesize[0], 2*avctx->width+256) * 7 * MB_SIZE) || !FF_ALLOCZ_TYPED_ARRAY(s->emu_edge_buffer, emu_buf_size)) return AVERROR(ENOMEM); } diff --git a/libavcodec/snowdec.c b/libavcodec/snowdec.c index c16e824c73..752cb4363a 100644 --- a/libavcodec/snowdec.c +++ b/libavcodec/snowdec.c @@ -605,14 +605,13 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *picture, if ((res = decode_header(s)) < 0) return res; - if (!s->mconly_picture->data[0]) { + if (avctx->debug & 2048) { + av_frame_unref(s->mconly_picture); res = ff_get_buffer(avctx, s->mconly_picture, AV_GET_BUFFER_FLAG_REF); if (res < 0) return res; - } - if (s->mconly_picture->format != avctx->pix_fmt) { - av_log(avctx, AV_LOG_ERROR, "pixel format changed\n"); - return AVERROR_INVALIDDATA; + + av_assert0 (s->mconly_picture->format == avctx->pix_fmt); } if ((res=ff_snow_common_init_after_header(avctx)) < 0) -- 2.52.0 _______________________________________________ ffmpeg-devel mailing list -- ffmpeg-devel@ffmpeg.org To unsubscribe send an email to ffmpeg-devel-leave@ffmpeg.org