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| author | Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> | 2015-06-26 19:31:03 +0200 |
|---|---|---|
| committer | Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com> | 2015-07-19 09:36:13 +0200 |
| commit | 72933729598240a05411d177a3f405b7694537de (patch) | |
| tree | 649db68007b2e029d3c3747f7c5495e6e3af08f2 | |
| parent | 2e1226a695dd2faada939e0bdc3ee166b05c3579 (diff) | |
| download | ffmpeg-72933729598240a05411d177a3f405b7694537de.tar.gz | |
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 <michaelni@gmx.at>
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
(cherry picked from commit 04dfbc9441beed93984568c1547f1ed588122627)
Signed-off-by: Andreas Cadhalpun <Andreas.Cadhalpun@googlemail.com>
| -rw-r--r-- | libavcodec/s302m.c | 6 |
1 files 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) { |