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SDK_API BOOL __stdcall OpenStream(int nPlayer, PUCHAR pHeaderBuf, int nSize);
typedef struct _FILE_HEADER
{
DWORD dwFLAGS; //文件头标志字段
DWORD dwFrameWidth; //帧宽
DWORD dwFrameHeight; //帧高
DWORD dwTotalFrames; //总帧数
DWORD dwVideoFormat; //源视频格式:0表示PAL,1表示NTSC
DWORD bThrowFrame; //是否抽帧:0表示不抽帧,1表示抽帧(互联网模式)
DWORD dwReserved1; //保留字段
DWORD dwReserved2; //保留字段
} FILE_HEADER, *PFILE_HEADER;
typedef struct
{
//nType = nTypeLens & 0xFF, nLens = nTypeLens>>8,说明nType共占1个字节,nLens共占3个字节
int nTypeLens;
//nFrame = nFrameIDR & 0xFFFF, nIDR=nFrameIDR>>16,说明nFrame占2个字节,nIDR占2个字节
int nFrameIDR;
//nCurPack = nPackets & 0x00FF, nTotalPack = nPackets & 0xFF00,说明nTotalPack占1个字节,nCurPack占一个字节,暂空两个字节备用
int nPackets;
//净载数据
unsigned char acData[DATA_SIZE_LARGE];
} SOCKET_DATA_LARGE, *PSOCKET_DATA_LARGE;
SOCKET_DATA_LARGE m_data_large;
//中间是获取数据代码
OpenStream(m_nChannel, m_data_large.acData, sizeof(FILE_HEADER));
[DllImport("SDK.dll", EntryPoint = "OpenStream")]
public static extern bool OpenStream(int nPlayer, byte[] pHeaderBuf, int nSize);
[return: MarshalAs(UnmanagedType.Bool)]
public static extern bool OpenStream(int nPlayer, [In,Out]byte[] pHeaderBuf, int nSize);
[DllImport("SDK.dll", EntryPoint = "OpenStream",CallingConvention=CallingConvention.StdCall)]
public static extern bool OpenStream(int nPlayer, [In,Out]byte[] pHeaderBuf, int nSize);