//// class CH264_RTP_UNPACK
class CH264_RTP_UNPACK
{
#define RTP_VERSION 2
#define BUF_SIZE (1024 * 500)
typedef struct
{
//LITTLE_ENDIAN
unsigned short cc:4;/* CSRC count */
unsigned short x:1; /* header extension flag */
unsigned short p:1; /* padding flag */
unsigned short v:2; /* packet type */
unsigned short pt:7;/* payload type */
unsigned short m:1; /* marker bit */
unsigned short q;/* quence number */
unsigned long ts; /* timestamp */
unsigned long ssrc;/*synchronization source */
} rtp_hdr_t;
public:
CH264_RTP_UNPACK ( HRESULT &hr, unsigned char H264PAYLOADTYPE = 96 )
: m_bSPSFound(fal)
, m_bWaitKeyFrame(true)
, m_bPrevFrameEnd(fal)
, m_bAsmblingFrame(fal)
, m_wSeq(1234)
, m_ssrc(0)
{
m_pBuf = new BYTE[BUF_SIZE] ;
if ( m_pBuf == NULL )
{
hr = E_OUTOFMEMORY ;
return ;
}
m_H264PAYLOADTYPE = H264PAYLOADTYPE ;
m_pEnd = m_pBuf + BUF_SIZE ;
m_pStart = m_pBuf ;
m_dwSize = 0 ;
hr = S_OK ;
}
窄带物联网
~CH264_RTP_UNPACK(void)
{
什么手机最便宜 delete [] m_pBuf ;
}
写景的段落
//pBuf为H264 RTP视频数据包，nSize为RTP视频数据包字节长度，outSize为输出视频数据帧字节长度。 绞监候
//返回值为指向视频数据帧的指针。输入数据可能被破坏。
BYTE* Par_RTP_Packet ( BYTE *pBuf, unsigned short nSize, int *outSize )
{
if ( nSize <= 12 )
的故事作文
{
return NULL ;
}
BYTE *cp = (BYTE*)&m_RTP_Header ;
cp[0] = pBuf[0] ;
cp[1] = pBuf[1] ;
m_RTP_Header.q = pBuf[2] ;
m_RTP_Header.q <<= 8 ;
m_RTP_Header.q |= pBuf[3] ;
m_RTP_Header.ts = pBuf[4] ;
m_RTP_Header.ts <<= 8 ;
m_RTP_Header.ts |= pBuf[5] ;
m_RTP_Header.ts <<= 8 ;
m_RTP_Header.ts |= pBuf[6] ;
m_RTP_Header.ts <<= 8 ;
m_RTP_Header.ts |= pBuf[7] ;
小太监净身
m_RTP_Header.ssrc = pBuf[8] ;
m_RTP_Header.ssrc <<= 8 ;
m_RTP_Header.ssrc |= pBuf[9] ;
m_RTP_Header.ssrc <<= 8 ;
m_RTP_Header.ssrc |= pBuf[10] ;
m_RTP_Header.ssrc <<= 8 ;
m_RTP_Header.ssrc |= pBuf[11] ;
BYTE *pPayload = pBuf + 12 ;
DWORD PayloadSize = nSize - 12 ;
// Check the RTP version number (it should be 2):
if ( m_RTP_Header.v != RTP_VERSION )
{
return NULL ;
}
/*
// Skip over any CSRC identifiers in the header:
神秘莫测的意思 if ( m_RTP_Header )
{
long cc = m_RTP_Header * 4 ;
捧腹大笑 if ( Size < cc )
{
return NULL ;
}
Size -= cc ;
p += cc ;
}
// Check for (& ignore) any RTP header extension
if ( m_RTP_Header.x )
{
if ( Size < 4 )
{
return NULL ;
}
Size -= 4 ;
p += 2 ;
long l = p[0] ;
l <<= 8 ;
l |= p[1] ;
p += 2 ;
l *= 4 ;
if ( Size < l ) ;
{
return NULL ;
}
Size -= l ;
p += l ;
}
// Discard any padding bytes:
if ( m_RTP_Header.p )
{
if ( Size == 0 )
{
return NULL ;
}
long Padding = p[Size-1] ;
if ( Size < Padding )
{
return NULL ;
}
Size -= Padding ;
}*/
// Check the Payload Type.
if ( m_RTP_Header.pt != m_H264PAYLOADTYPE )
{
return NULL ;
}
int PayloadType = pPayload[0] & 0x1f ;
int NALType = PayloadType ;
if ( NALType == 28 ) // FU_A
{
if ( PayloadSize < 2 )
{
return NULL ;
}
NALType = pPayload[1] & 0x1f ;
