diff options
Diffstat (limited to 'Src/Plugins/Input/in_flv/FLVAudioHeader.cpp')
| -rw-r--r-- | Src/Plugins/Input/in_flv/FLVAudioHeader.cpp | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/Src/Plugins/Input/in_flv/FLVAudioHeader.cpp b/Src/Plugins/Input/in_flv/FLVAudioHeader.cpp new file mode 100644 index 00000000..5042bf42 --- /dev/null +++ b/Src/Plugins/Input/in_flv/FLVAudioHeader.cpp @@ -0,0 +1,34 @@ +#include "FLVAudioHeader.h" + +/* +(c) 2006 Nullsoft, Inc. +Author: Ben Allison benski@nullsoft.com +*/ + +/* +soundType 1 bit (byte & 0x01) >> 0 0: mono, 1: stereo +soundSize 1 bit (byte & 0x02)>> 1 0: 8-bit, 2: 16-bit +soundRate 2 bits (byte & 0x0C) >> 2 0: 5.5 kHz, 1: 11 kHz, 2: 22 kHz, 3: 44 kHz +soundFormat 4 bits (byte & 0xf0) >> 4 0: Uncompressed, 1: ADPCM, 2: MP3, 5: Nellymoser 8kHz mono, 6: Nellymoser +*/ + +bool FLVAudioHeader::Read(unsigned __int8 *data, size_t size) +{ + if (size < 1) + return false; // header size too small + + + unsigned __int8 byte = data[0]; + + stereo = !!((byte & 0x01) >> 0); + bits = ((byte & 0x02) >> 1) ? 16 : 8; + switch ((byte & 0x0C) >> 2) + { + case 0: sampleRate = 5512; break; + case 1: sampleRate = 11025; break; + case 2: sampleRate = 22050; break; + case 3: sampleRate = 44100; break; + } + format = (byte & 0xf0) >> 4; + return true; +}
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