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for #310, workaround to force to LC/MAIN, donot support SSR above. 2.0.113

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winlin 2015-02-10 16:58:13 +08:00
parent f8bdd28de6
commit 4820d455d5
5 changed files with 97 additions and 44 deletions
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36
trunk/src/kernel/srs_kernel_codec.cpp
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@ -281,25 +281,41 @@ int SrsAvcAacCodec::audio_aac_demux(char* data, int size, SrsCodecSample* sample
}
// only need to decode the first 2bytes:
// audioObjectType, aac_profile, 5bits.
// samplingFrequencyIndex, aac_sample_rate, 4bits.
// channelConfiguration, aac_channels, 4bits
// audioObjectType, aac_profile, 5bits.
// samplingFrequencyIndex, aac_sample_rate, 4bits.
// channelConfiguration, aac_channels, 4bits
if (!stream->require(2)) {
ret = ERROR_HLS_DECODE_ERROR;
srs_error("audio codec decode aac sequence header failed. ret=%d", ret);
return ret;
}
aac_profile = stream->read_1bytes();
aac_sample_rate = stream->read_1bytes();
u_int8_t profile_ObjectType = stream->read_1bytes();
u_int8_t samplingFrequencyIndex = stream->read_1bytes();
aac_channels = (aac_sample_rate >> 3) & 0x0f;
aac_sample_rate = ((aac_profile << 1) & 0x0e) | ((aac_sample_rate >> 7) & 0x01);
aac_profile = (aac_profile >> 3) & 0x1f;
aac_channels = (samplingFrequencyIndex >> 3) & 0x0f;
samplingFrequencyIndex = ((profile_ObjectType << 1) & 0x0e) | ((samplingFrequencyIndex >> 7) & 0x01);
profile_ObjectType = (profile_ObjectType >> 3) & 0x1f;
// set the aac sample rate.
aac_sample_rate = samplingFrequencyIndex;
// the profile = object_id + 1
// @see aac-mp4a-format-ISO_IEC_14496-3+2001.pdf, page 78,
// Table 1. A.9 ¨C MPEG-2 Audio profiles and MPEG-4 Audio object types
aac_profile = profile_ObjectType + 1;
if (aac_profile == 0 || aac_profile == 0x1f) {
// the valid aac profile:
// MPEG-2 profile
// Main profile (ID == 1)
// Low Complexity profile (LC) (ID == 2)
// Scalable Sampling Rate profile (SSR) (ID == 3)
// (reserved) (ID == 4)
// @see aac-mp4a-format-ISO_IEC_14496-3+2001.pdf, page 78,
// Table 1. A.9 ¨C MPEG-2 Audio profiles and MPEG-4 Audio object types
if (aac_profile > 4) {
ret = ERROR_HLS_DECODE_ERROR;
srs_error("audio codec decode aac sequence header failed, "
"adts object=%d invalid. ret=%d", aac_profile, ret);
"adts object=%d invalid. ret=%d", profile_ObjectType, ret);
return ret;
}