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Multiplex HE-AAC with explicit SBR signalling in MKV

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This is a possible fix for bug #858: http://www.lonelycoder.com/redmine/issues/858

Ref: ISO/IEC 14496-3, Part 3: Audio
     Section 1.6.2.1 AudioSpecificConfig, and table 1.13 in particular
This commit is contained in:
Mikael Lund Jepsen 2012-02-21 22:58:56 +01:00
parent fdf89b2768
commit 3e3a197fa5
1 changed files with 13 additions and 4 deletions
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17
src/parser_latm.c
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@ -63,19 +63,28 @@ read_audio_specific_config(elementary_stream_t *st, latm_private_t *latm,
int aot, sr;
aot = read_bits(bs, 5);
if(aot != 2)
return;
latm->sample_rate_index = read_bits(bs, 4);
if(latm->sample_rate_index == 0xf)
return;
sr = read_bits(bs, 24);
else
sr = sri_to_rate(latm->sample_rate_index);
sr = sri_to_rate(latm->sample_rate_index);
st->es_frame_duration = 1024 * 90000 / sr;
latm->channel_config = read_bits(bs, 4);
if (aot == 5) { // AOT_SBR
if (read_bits(bs, 4) == 0xf) { // extensionSamplingFrequencyIndex
skip_bits(bs, 24);
}
aot = read_bits(bs, 5); // this is the main object type (i.e. non-extended)
}
if(aot != 2)
return;
skip_bits(bs, 1); //framelen_flag
if(read_bits1(bs)) // depends_on_coder
skip_bits(bs, 14);