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aac: Fix TNS decoding for the 512 sample window family.

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This commit is contained in:
Alex Converse 2013-12-23 22:20:42 -08:00
parent e2096e2eaa
commit b2212dec0f
3 changed files with 7 additions and 1 deletions
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3
libavcodec/aacdec.c
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@ -1178,13 +1178,14 @@ static int decode_ics_info(AACContext *ac, IndividualChannelStream *ics,
if (aot == AOT_ER_AAC_LD || aot == AOT_ER_AAC_ELD) {
ics->swb_offset = ff_swb_offset_512[ac->oc[1].m4ac.sampling_index];
ics->num_swb = ff_aac_num_swb_512[ac->oc[1].m4ac.sampling_index];
ics->tns_max_bands = ff_tns_max_bands_512[ac->oc[1].m4ac.sampling_index];
if (!ics->num_swb || !ics->swb_offset)
return AVERROR_BUG;
} else {
ics->swb_offset = ff_swb_offset_1024[ac->oc[1].m4ac.sampling_index];
ics->num_swb = ff_aac_num_swb_1024[ac->oc[1].m4ac.sampling_index];
ics->tns_max_bands = ff_tns_max_bands_1024[ac->oc[1].m4ac.sampling_index];
}
ics->tns_max_bands = ff_tns_max_bands_1024[ac->oc[1].m4ac.sampling_index];
if (aot != AOT_ER_AAC_ELD) {
ics->predictor_present = get_bits1(gb);
ics->predictor_reset_group = 0;

4
libavcodec/aactab.c
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@ -1237,6 +1237,10 @@ const uint8_t ff_tns_max_bands_1024[] = {
31, 31, 34, 40, 42, 51, 46, 46, 42, 42, 42, 39, 39
};
const uint8_t ff_tns_max_bands_512[] = {
0, 0, 0, 31, 32, 37, 31, 31, 0, 0, 0, 0, 0
};
const uint8_t ff_tns_max_bands_128[] = {
9, 9, 10, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14
};

1
libavcodec/aactab.h
View File

@ -76,6 +76,7 @@ extern const uint16_t * const ff_swb_offset_512 [13];
extern const uint16_t * const ff_swb_offset_128 [13];
extern const uint8_t ff_tns_max_bands_1024[13];
extern const uint8_t ff_tns_max_bands_512 [13];
extern const uint8_t ff_tns_max_bands_128 [13];
#endif /* AVCODEC_AACTAB_H */