41 lines
816 B
C++
41 lines
816 B
C++
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#include "FLVHeader.h"
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#include "FLVUtil.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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#define FLV_BITMASK_AUDIO 0x4
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#define FLV_BITMASK_VIDEO 0x1
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/*
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FLV Header spec
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Signature - uint8[3] - must equal "FLV"
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Version - uint8 - only known version is 1
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Flags - uint8 - bitmask, 4 is audio, 1 is video
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Offset - uint32 - total size of header (9), big endian
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*/
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bool FLVHeader::Read(uint8_t *data, size_t size)
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{
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if (size < 9)
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return false; // too small to be an FLV header
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if (data[0] != 'F' || data[1] != 'L' || data[2] != 'V')
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return false; // invalid signature
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version = data[3];
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hasAudio = !!(data[4] & FLV_BITMASK_AUDIO);
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hasVideo = data[4] & FLV_BITMASK_VIDEO;
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headerSize = FLV::Read32(&data[5]);
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if (headerSize != 9)
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return false;
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return true;
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}
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