[FFmpeg-devel] [PATCH 9/9] avcodec/r210enc: Use av_rescale for bitrate

From: Michael Niedermayer <michael@niedermayer.cc>
To: FFmpeg development discussions and patches <ffmpeg-devel@ffmpeg.org>
Subject: [FFmpeg-devel] [PATCH 9/9] avcodec/r210enc: Use av_rescale for bitrate
Date: Mon, 17 Jun 2024 01:08:31 +0200
Message-ID: <20240616230831.912377-9-michael@niedermayer.cc> (raw)
In-Reply-To: <20240616230831.912377-1-michael@niedermayer.cc>

Fixes: signed integer overflow: 281612954574848 * 65344 cannot be represented in type 'long'
Fixes: 68956/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_R210_fuzzer-6459074458746880

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/r210enc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libavcodec/r210enc.c b/libavcodec/r210enc.c
index 91e34528741..ec1ebc8d609 100644
--- a/libavcodec/r210enc.c
+++ b/libavcodec/r210enc.c
@@ -35,7 +35,7 @@ static av_cold int encode_init(AVCodecContext *avctx)
 
     avctx->bits_per_coded_sample = 32;
     if (avctx->width > 0)
-        avctx->bit_rate = ff_guess_coded_bitrate(avctx) * aligned_width / avctx->width;
+        avctx->bit_rate = av_rescale(ff_guess_coded_bitrate(avctx), aligned_width, avctx->width);
 
     return 0;
 }
-- 
2.45.2

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