Tasmota/lib/libesp32/rtsp/CStreamer.h

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#pragma once
#include "platglue.h"
typedef unsigned const char *BufPtr;
class CStreamer
{
public:
CStreamer(SOCKET aClient, u_short width, u_short height);
virtual ~CStreamer();
void InitTransport(u_short aRtpPort, u_short aRtcpPort, bool TCP);
u_short GetRtpServerPort();
u_short GetRtcpServerPort();
virtual void streamImage(uint32_t curMsec) = 0; // send a new image to the client
protected:
void streamFrame(unsigned const char *data, uint32_t dataLen, uint32_t curMsec);
private:
int SendRtpPacket(unsigned const char *jpeg, int jpegLen, int fragmentOffset, BufPtr quant0tbl = NULL, BufPtr quant1tbl = NULL);// returns new fragmentOffset or 0 if finished with frame
UDPSOCKET m_RtpSocket; // RTP socket for streaming RTP packets to client
UDPSOCKET m_RtcpSocket; // RTCP socket for sending/receiving RTCP packages
uint16_t m_RtpClientPort; // RTP receiver port on client (in host byte order!)
uint16_t m_RtcpClientPort; // RTCP receiver port on client (in host byte order!)
IPPORT m_RtpServerPort; // RTP sender port on server
IPPORT m_RtcpServerPort; // RTCP sender port on server
u_short m_SequenceNumber;
uint32_t m_Timestamp;
int m_SendIdx;
bool m_TCPTransport;
SOCKET m_Client;
uint32_t m_prevMsec;
u_short m_width; // image data info
u_short m_height;
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char RtpBuf[2048];
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};
// When JPEG is stored as a file it is wrapped in a container
// This function fixes up the provided start ptr to point to the
// actual JPEG stream data and returns the number of bytes skipped
// returns true if the file seems to be valid jpeg
// If quant tables can be found they will be stored in qtable0/1
bool decodeJPEGfile(BufPtr *start, uint32_t *len, BufPtr *qtable0, BufPtr *qtable1);
bool findJPEGheader(BufPtr *start, uint32_t *len, uint8_t marker);
// Given a jpeg ptr pointing to a pair of length bytes, advance the pointer to
// the next 0xff marker byte
void nextJpegBlock(BufPtr *start);