__inline unsigned char * SetExtended(unsigned id, unsigned len)
{
m_packet[0] |= 0x10;
unsigned char * ptr = m_packet + PluginCodec_RTP_GetCSRCHdrLength(m_packet);
switch (id >> 16) {
case 0 :
PluginCodec_RTP_SetWORD(ptr, 0, id);
PluginCodec_RTP_SetWORD(ptr, 2, (len+3)/4);
ptr += 4;
break;
case 1 :
*ptr++ = 0xbe;
*ptr++ = 0xde;
PluginCodec_RTP_SetWORD(ptr, 0, (len+7)/4); ptr += 2;
*ptr++ = (unsigned char)(((id&0xf) << 4)|(len-1));
break;
case 2 :
*ptr++ = 0x10;
*ptr++ = 0x00;
PluginCodec_RTP_SetWORD(ptr, 0, (len+8)/4); ptr += 2;
*ptr++ = (unsigned char)(id&0xff);
*ptr++ = (unsigned char)(len&0xff);
}
m_headerSize = PluginCodec_RTP_GetHeaderLength(m_packet);
return ptr;
}
PluginCodec_RTP(const void * packet, unsigned size)
: m_packet((unsigned char *)packet)
, m_maxSize(size)
, m_headerSize(PluginCodec_RTP_GetHeaderLength(m_packet))
, m_payloadSize(size - m_headerSize)
{
}
virtual bool Transcode(const void * fromPtr,
unsigned & fromLen,
void * toPtr,
unsigned & toLen,
unsigned & flags)
{
// At this point fromPtr and toPtr are validated as non NULL
const PluginCodec_Video_FrameHeader * videoHeader =
(const PluginCodec_Video_FrameHeader *)PluginCodec_RTP_GetPayloadPtr(fromPtr);
const unsigned char * videoBuffer = OPAL_VIDEO_FRAME_DATA_PTR(videoHeader);
/* Check for catastrophic failures, if return false, aborts the codec
conversion completely, and will be closed and re-opened. */
if (fromLen < videoHeader->width*videoHeader->height*3/2 +
sizeof(PluginCodec_Video_FrameHeader) +
PluginCodec_RTP_GetHeaderLength(fromPtr))
return false;
/* Do conversion of source YUV420 video frame to RTP packets, do not exceed
the size indicated in toLen for any of the output packets. If there are
no packets generated, set the toLen to zero and no packets will be sent
over the wire. This allows for various bit rate control algorithms. */
// Set output packet size, including RTP header
toLen = 1400;
// If we determine this is an Intra (reference) frame, set flag
if (true)
flags |= PluginCodec_ReturnCoderIFrame;
// If we determine this is the last RTP packet of video frame, set flag
if (true)
flags |= PluginCodec_ReturnCoderLastFrame;
return true;
}
__inline void SetExtended(unsigned type, unsigned sz)
{
PluginCodec_RTP_SetExtended(m_packet, type, sz);
m_headerSize = PluginCodec_RTP_GetHeaderLength(m_packet);
}
