winamp/Src/Plugins/Input/in_flv/FLVStreamHeader.cpp
2024-09-24 14:54:57 +02:00

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1 KiB
C++

#include "FLVStreamHeader.h"
#include "FLVUtil.h"
/*
(c) 2006 Nullsoft, Inc.
Author: Ben Allison benski@nullsoft.com
*/
/*
PreviousTagSize - uint32 - total size of previous tag, presumably for stream continuity checking. big endian
Type - uint8 - what does this frame contain? 0x12=meta, 0x8=audio, 0x9=video
BodyLength - uint24 - size of the data following this header. big endian
Timestamp - uint24 - timestamp (milliseconds). big endian
Timestamp High - uint8 - high 8 bits of timestamp (to form 32bit timestamp)
Stream ID - uint24 - always zero
*/
bool FLVStreamHeader::Read(uint8_t *data, size_t size)
{
if (size < 15)
return false; // header size too small
previousSize = FLV::Read32(&data[0]);
type = data[4];
dataSize = FLV::Read24(&data[5]);
timestamp = FLV::Read24(&data[8]);
uint8_t timestampHigh = FLV::Read8(&data[11]);
timestamp |= (timestampHigh << 24);
streamID = FLV::Read24(&data[12]);
if (streamID != 0)
return false;
return true;
}