34 lines
874 B
C++
34 lines
874 B
C++
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#include "FLVAudioHeader.h"
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/*
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(c) 2006 Nullsoft, Inc.
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Author: Ben Allison benski@nullsoft.com
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*/
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/*
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soundType 1 bit (byte & 0x01) >> 0 0: mono, 1: stereo
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soundSize 1 bit (byte & 0x02)>> 1 0: 8-bit, 2: 16-bit
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soundRate 2 bits (byte & 0x0C) >> 2 0: 5.5 kHz, 1: 11 kHz, 2: 22 kHz, 3: 44 kHz
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soundFormat 4 bits (byte & 0xf0) >> 4 0: Uncompressed, 1: ADPCM, 2: MP3, 5: Nellymoser 8kHz mono, 6: Nellymoser
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*/
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bool FLVAudioHeader::Read(unsigned __int8 *data, size_t size)
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{
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if (size < 1)
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return false; // header size too small
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unsigned __int8 byte = data[0];
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stereo = !!((byte & 0x01) >> 0);
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bits = ((byte & 0x02) >> 1) ? 16 : 8;
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switch ((byte & 0x0C) >> 2)
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{
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case 0: sampleRate = 5512; break;
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case 1: sampleRate = 11025; break;
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case 2: sampleRate = 22050; break;
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case 3: sampleRate = 44100; break;
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}
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format = (byte & 0xf0) >> 4;
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return true;
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}
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