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aacsbr: check sample_rate before using it, fix division by 0

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Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-11-20 03:20:43 +01:00
parent aed128f07d
commit cf5f4c5169
1 changed files with 3 additions and 3 deletions
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6
libavcodec/aacsbr.c
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@ -340,9 +340,6 @@ static int sbr_make_f_master(AACContext *ac, SpectralBandReplication *sbr,
} else } else
temp = 5000; temp = 5000;
start_min = ((temp << 7) + (sbr->sample_rate >> 1)) / sbr->sample_rate;
stop_min = ((temp << 8) + (sbr->sample_rate >> 1)) / sbr->sample_rate;
switch (sbr->sample_rate) { switch (sbr->sample_rate) {
case 16000: case 16000:
sbr_offset_ptr = sbr_offset[0]; sbr_offset_ptr = sbr_offset[0];
@ -368,6 +365,9 @@ static int sbr_make_f_master(AACContext *ac, SpectralBandReplication *sbr,
return -1; return -1;
} }
start_min = ((temp << 7) + (sbr->sample_rate >> 1)) / sbr->sample_rate;
stop_min = ((temp << 8) + (sbr->sample_rate >> 1)) / sbr->sample_rate;
sbr->k[0] = start_min + sbr_offset_ptr[spectrum->bs_start_freq]; sbr->k[0] = start_min + sbr_offset_ptr[spectrum->bs_start_freq];
if (spectrum->bs_stop_freq < 14) { if (spectrum->bs_stop_freq < 14) {