From 72933729598240a05411d177a3f405b7694537de Mon Sep 17 00:00:00 2001 From: Andreas Cadhalpun Date: Fri, 26 Jun 2015 19:31:03 +0200 Subject: [PATCH] s302m: fix arithmetic exception If nb_samples is zero, the bit_rate calculation results in a division by zero. Since ff_get_buffer fails if frame->nb_samples is zero, this can be fixed by moving the bit_rate calculation after that function call. That also makes it possible to reuse the already calculated frame->nb_samples value. Reviewed-by: Michael Niedermayer Signed-off-by: Andreas Cadhalpun (cherry picked from commit 04dfbc9441beed93984568c1547f1ed588122627) Signed-off-by: Andreas Cadhalpun --- libavcodec/s302m.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/libavcodec/s302m.c b/libavcodec/s302m.c index 5cf9eb5b1d..24130d8786 100644 --- a/libavcodec/s302m.c +++ b/libavcodec/s302m.c @@ -85,10 +85,6 @@ static int s302m_parse_frame_header(AVCodecContext *avctx, const uint8_t *buf, case 8: avctx->channel_layout = AV_CH_LAYOUT_5POINT1_BACK | AV_CH_LAYOUT_STEREO_DOWNMIX; } - avctx->bit_rate = 48000 * avctx->channels * (avctx->bits_per_raw_sample + 4) + - 32 * (48000 / (buf_size * 8 / - (avctx->channels * - (avctx->bits_per_raw_sample + 4)))); return frame_size; } @@ -117,6 +113,8 @@ static int s302m_decode_frame(AVCodecContext *avctx, void *data, if ((ret = ff_get_buffer(avctx, frame, 0)) < 0) return ret; + avctx->bit_rate = 48000 * avctx->channels * (avctx->bits_per_raw_sample + 4) + + 32 * 48000 / frame->nb_samples; buf_size = (frame->nb_samples * avctx->channels / 2) * block_size; if (avctx->bits_per_raw_sample == 24) {