p64encoder.h

来自「mgcp协议源代码。支持多种编码：g711」· C头文件 代码 · 共 72 行

/*p64encoder.h copyright (c)Indranet Technologies ltd ([e-mail])
 *                        Author Derek J Smithies ([e-mail])
 *
 *
 * This file defines the p64encoder class, which is the combined total of
 * the grabber, pre encoder, and encoder classes.
 */
#ifndef lib_p64encoder_h
#define lib_p64encoder_h
#include <ptlib.h>

#include "p64.h"
#include "grabber.h"
#include "vid_coder.h"
#include "videoframe.h"
#include "encoder-h261.h"
#include "transmitter.h"

#define WIDTH 352
#define HEIGHT 288



class P64Encoder{
    public:
      P64Encoder(int videoInput, BOOL videoIsPal);
      ~P64Encoder();
      
      /**Set size of the grabbing window, which sets the
         size of the vid_frame class. When the vid_frame class
         is passed to grabber and encoder, the grabber and
         encoder automatically resize */
      void SetSize(int width,int height);

      /**Called by the display routine, so we can display
         local video using the grabbed 411 format stuff.  */
      const u_char* Frame();

        /**Grabs one video frame,
           or generates test pattern if grabber is not operational */
	void GrabOneFrame();


        /** On a previously grabbed frame,
            1)do some motion and block changed checking,
            2)h261 format conversion and
            3)store result in a series of packets in a list 
	         in the transmitter class.  */
	void ProcessOneFrame();

        /**Retrieves the first packet in the list recorded in
	       in the transmitter class */
        void ReadOnePacket(
                   u_char * buffer,    /// Buffer of encoded data
                   unsigned & length /// Actual length of encoded data buffer
		   );

        int PacketsOutStanding()
	  { return trans->PacketsOutStanding();}

protected:
   //variables used in grabbing/processing the image. 
    Transmitter      *trans;
    H261PixelEncoder *h261_edr;
    VideoGrabber     *video_grab;
    VideoFrame       *vid_frame;
    Pre_Vid_Coder    *pre_vid;
};


#endif   //#ifndef lib_p64encoder_h