public MSFHeader ParseMSFHeader(int offset, Stream _stream)
{
_stream.Seek(offset, SeekOrigin.Begin);
byte[] tmp = new byte[4];
MSFHeader msfHeader = new MSFHeader();
_stream.Read(tmp, 0, 1);
msfHeader.Length = tmp[0];
_stream.Read(tmp, 0, 1);
msfHeader.VideoBlockIndicator = (uint)BitTools.MaskBits(tmp, 1, 1);
msfHeader.AudioBlockIndicator = (uint)BitTools.MaskBits(tmp, 2, 1);
msfHeader.DataBlockIndicator = (uint)BitTools.MaskBits(tmp, 3, 1);
msfHeader.ExtBlockIndicator = (uint)BitTools.MaskBits(tmp, 4, 1);
// 起始播放时间
if (BitTools.MaskBits(tmp, 0, 1) == 1)
{
_stream.Read(tmp, 0, 4);
msfHeader.PlayStartTime = BitTools.MaskBits(tmp, 0, 32) * timeUint;
}
// 视频段信息
if (msfHeader.VideoBlockIndicator == 1)
{
_stream.Read(tmp, 0, 3);
msfHeader.VideoBlockLenth = (uint)BitTools.MaskBits(tmp, 0, 21);
msfHeader.VideoBlockNum = (uint)BitTools.MaskBits(tmp, 21, 3);
}
//音频段信息
if (msfHeader.AudioBlockIndicator == 1)
{
_stream.Read(tmp, 0, 3);
msfHeader.AudioBlockLenth = (uint)BitTools.MaskBits(tmp, 0, 21);
msfHeader.AudioBlockNum = (uint)BitTools.MaskBits(tmp, 21, 3);
}
if (msfHeader.DataBlockIndicator == 1)
{
_stream.Seek(3, SeekOrigin.Current);
}
if (msfHeader.ExtBlockIndicator == 1)
{
_stream.Seek(3, SeekOrigin.Current);
}
// 跳过视频和音频参数集
return(msfHeader);
}
public MSFHeader ParseMSFHeader(int offset, Stream _stream)
{
_stream.Seek(offset, SeekOrigin.Begin);
byte[] tmp = new byte[4];
MSFHeader msfHeader = new MSFHeader();
_stream.Read(tmp, 0, 1);
msfHeader.Length = tmp[0];
_stream.Read(tmp, 0, 1);
msfHeader.VideoBlockIndicator = (uint)BitTools.MaskBits(tmp, 1, 1);
msfHeader.AudioBlockIndicator = (uint)BitTools.MaskBits(tmp, 2, 1);
msfHeader.DataBlockIndicator = (uint)BitTools.MaskBits(tmp, 3, 1);
msfHeader.ExtBlockIndicator = (uint)BitTools.MaskBits(tmp, 4, 1);
// 起始播放时间
if (BitTools.MaskBits(tmp, 0, 1) == 1)
{
_stream.Read(tmp, 0, 4);
msfHeader.PlayStartTime = BitTools.MaskBits(tmp, 0, 32) * timeUint ;
}
// 视频段信息
if (msfHeader.VideoBlockIndicator == 1)
{
_stream.Read(tmp, 0, 3);
msfHeader.VideoBlockLenth = (uint)BitTools.MaskBits(tmp, 0, 21);
msfHeader.VideoBlockNum = (uint)BitTools.MaskBits(tmp, 21, 3);
}
//音频段信息
if (msfHeader.AudioBlockIndicator == 1)
{
_stream.Read(tmp, 0, 3);
msfHeader.AudioBlockLenth = (uint)BitTools.MaskBits(tmp, 0, 21);
msfHeader.AudioBlockNum = (uint)BitTools.MaskBits(tmp, 21, 3);
}
if (msfHeader.DataBlockIndicator == 1)
_stream.Seek(3, SeekOrigin.Current);
if (msfHeader.ExtBlockIndicator == 1)
_stream.Seek(3, SeekOrigin.Current);
// 跳过视频和音频参数集
return msfHeader;
}