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aac: Validate the sbr sample rate before using the value

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Avoid a floating point exception.

Bug-Id: 1027
CC: libav-stable@libav.org
This commit is contained in:
Luca Barbato 2017-02-11 15:40:20 +01:00
parent 0ee78020cd
commit ba30b74686
1 changed files with 10 additions and 10 deletions
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20
libavcodec/aacsbr.c
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@ -327,16 +327,6 @@ static int sbr_make_f_master(AACContext *ac, SpectralBandReplication *sbr,
const int8_t *sbr_offset_ptr; const int8_t *sbr_offset_ptr;
int16_t stop_dk[13]; int16_t stop_dk[13];
if (sbr->sample_rate < 32000) {
temp = 3000;
} else if (sbr->sample_rate < 64000) {
temp = 4000;
} else
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];
@ -362,6 +352,16 @@ static int sbr_make_f_master(AACContext *ac, SpectralBandReplication *sbr,
return -1; return -1;
} }
if (sbr->sample_rate < 32000) {
temp = 3000;
} else if (sbr->sample_rate < 64000) {
temp = 4000;
} else
temp = 5000;
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) {