mp4_decodeencodeapi.c

凌阳SPCE3200 系统开发板随机自带源程序。共安排了32个子目录

//=============================================================
// 文件名称：	MP4_DecodeEncode.c
// 功能描述：	mp4编解码
// 维护记录：	2007-01-16	v1.0
//=============================================================
#include "SPCE3200_Register.h"
#include "SPCE3200_Constant.h"
#include ".\MP4_Codec\MP4_Codec.h"
#include ".\System\BLNDMA.h"

unsigned int g_unMP4HW_RunMode=NORMAL_MODE;
unsigned int g_unMP4HW_dvWidth;
unsigned int g_unMP4HW_dvHigh;
unsigned int g_unBLD_DstWidth;
unsigned int g_unBLD_DstHigh;
unsigned int g_unMP4HW_DecodeBuff[3]; 
unsigned int g_unMP4HW_TVBuffer[3];


unsigned int g_unMP4_encodePFrameCount;
unsigned int g_unMP4_decodePFrameCount;

unsigned int g_unMP4_setLCD_OK=0;
unsigned int g_unMP4_TVCount=0;


void mp4_SetRunMode(unsigned char m_ucMP4HW_Rmode)
{
	g_unMP4HW_RunMode = m_ucMP4HW_Rmode;
	g_unMP4_encodePFrameCount = 0;
	g_unMP4_decodePFrameCount = 0;
	g_unMP4_setLCD_OK = 0;
	g_unMP4_TVCount = 0;
}

void mp4_compressor_prepare(unsigned int width,unsigned int height,unsigned int p_frame_cntr,unsigned int unVOPTimeIncLen)
{
	
	    
         // Rate control initial setting(videorst)
        *P_MPEG4_MODE_CTRL3 = 0x08;//Mpg1skipmode
        *P_MPEG4_MODE_CTRL3 = 0x00;
        
        // imgwidth
        *P_MPEG4_FRAMEBUFFER_HSIZE = 320; //original width
        *P_MPEG4_WIDTH_LOW = width;
        *P_MPEG4_WIDTH_HIGH = (width>>8); 
        
        
        // imgheight
        *P_MPEG4_HEIGHT_LOW = height;
        *P_MPEG4_HEIGHT_HIGH = (height>>8);
        // hoffset
        *P_MPEG4_HOROFFSET_LOW = 0x00; 
        *P_MPEG4_HOROFFSET_HIGH = 0x00;  
        // voffset
        *P_MPEG4_VEROFFSET_LOW = 0x00; 
        *P_MPEG4_VEROFFSET_HIGH = 0x00; 
        // vlc offset
        *P_MPEG4_VLCOFFSET_SALOW = 0x00; 
        *P_MPEG4_VLCOFFSET_SAMID = 0x00;                             
        *P_MPEG4_VLCOFFSET_SAHIGH = 0x00;
        //
   
        *P_MPEG4_HOR_SCALE = 0x00;  //add by ww
        *P_MPEG4_VEL_SCALE = 0x00;  //add by ww
 
		*P_MPEG4_PFRAME_NUMBER = 2;
		if(((g_unMP4_encodePFrameCount++)%(P_FRAME_NUMBER+1))!=0)
		{
 	       *P_MPEG4_FRAME_MODE=0;//always P frame
		}
		else
		{
		   *P_MPEG4_FRAME_MODE=1;//always I frame	
		}
        *P_MPEG4_MODE_CTRL3 = 0x72;//gopsetting,SOF mode,half pel en
               
        // 0 : no truncate, 1 : truncate
        *P_MPEG4_TRUNCATE_CTRL = 0x01;   
        
        // set Qscale enable
        *P_MPEG4_QTABLE_CTRL = 0x06;        
             
        // turn on all the srams of texture engine 
        *P_MPEG4_SRAM_EN = 0x01;
        
        // VOPTimeIncLen  20frame per sec
        *P_MPEG4_VOPTIMEINC_LENGTH = unVOPTimeIncLen;  //original 0x0e 15 frame per sec
 	 
        //*P_VOPTimeInc_low= 0x01;
		//*P_VOPTimeInc_high= 0x00;
        //*P_VOPTimeIncRes_low=0x0f;
		//*P_VOPTimeIncRes_high=0x00;
		
//------------------------------------------------------------//        
//-----------------------  mv_max_enc ------------------------//
//------------------------------------------------------------//

        //*P_MPEG4_MODE_CTRL1 = 0x06;
        *P_MPEG4_MODE_CTRL1 = 0xc6;//yuv not full range
        
       
        // fill I Qscale
        *P_MPEG4_IFRAME_QSCALE = 0x02;//5
        // fill P Qscale
        *P_MPEG4_PFRAME_QSCALE = 0x02;//5
        
#ifdef  H263_CODEC        
        *P_MPEG4_H263_CTRL = 0x01 + H263_FORMAT;        //bit0  Encoding/decoding 1:enable
                                        //                        0:disable
                                        //bit3-1 Specify H.263 Format QCIF or others
                                        //bit6  Enable 4MV Decoding mode or not
                                        //bit7  Enable AC Prediction decoding mode or not
       *P_MPEG4_H263_STRUCTURE = 0x00;        //bit 0 Enable H.263 GOB structure for Encoding/Decoding
                                        //bit7-4 Specify number of bits needed for certain resolution.
                                                                                        
#endif                                        
                        
        //*P_MPEG4_INT_CTRL				= 0x03;//0x0f  //add by ww
        

}    

void mp4_set_encode_frame_buffer_address(unsigned int ABBufferSrc,unsigned int CDBufferDst,unsigned int unBuffSize)
{
	    //---- SET A/B buffer
       	*P_MPEG4_RAWBUFFER_SEL = 0x00;
        *P_MPEG4_RAWBUFFER_SA1 = ABBufferSrc;            //0xa0400000
        *P_MPEG4_RAWBUFFER_SA2 = ABBufferSrc + unBuffSize;  //0xa0430000
        *P_MPEG4_RAWBUFFER_SA3 = ABBufferSrc + (unBuffSize*2);  //0xa0460000
        
        //------ SET C/D buffer ------//
        *P_MPEG4_WRITEBUFFER_SA1  = CDBufferDst;            //0xa0590000 
        *P_MPEG4_WRITEBUFFER_SA2  = CDBufferDst + unBuffSize;  //0xa05C0000
        
        *P_MPEG4_VLCBUFFER_SEL = 0x00; 
        *P_MPEG4_VLCBUFFER_SA2  = 0;
}   


unsigned int mp4_compress_frame(unsigned int vlc_address,unsigned int frame)
{
	unsigned int vlc_size;
	unsigned int i;
	unsigned int picture_address_ptr;
	unsigned int rd_buffer_switch=frame&0x00000001;
	unsigned int wd_buffer_switch=~rd_buffer_switch;
	
	
	    wd_buffer_switch=wd_buffer_switch&0x00000001;
        picture_address_ptr=*P_CSI_BUFFER_SEL;    
      		 
				
		if(picture_address_ptr==0) picture_address_ptr=2;
		else    picture_address_ptr--;
		//---- SET A/B buffer
        *P_MPEG4_RAWBUFFER_SEL = picture_address_ptr;
    	 
        //------ SET C/D buffer ------//
        // RD Bufer
        *P_MPEG4_REFBUFFER_SEL    = rd_buffer_switch; 
        //////print2("P_MPEG4_REFBUFFER_SEL = ",0,rd_buffer_switch);
        // WR Bufer
        *P_MPEG4_WRITEBUFFER_SEL = wd_buffer_switch; 
//        print2("P_MPEG4_REFBUFFER_SEL = ",0,wd_buffer_switch);



		//---- SET VLCA/VLCB buffer
        // vlcoffset
        i=vlc_address&0xfffffc00;   

        *P_MPEG4_VLCBUFFER_SA1   =  i;

        *P_MPEG4_VLCOFFSET_SALOW = vlc_address;
        i=vlc_address&0x00000300;
        i=i>>8;
        *P_MPEG4_VLCOFFSET_SAMID = i;
        *P_MPEG4_VLCOFFSET_SAHIGH = 0;
     
///////////////////////////////////////////////////////                
        // cpu sof information
        *P_MPEG4_COMPRESS_CTRL = 0x08;        
        // dummy delay
        for (i=0;i<10;i++);
        // sof to trigger compression
        *P_MPEG4_COMPRESS_CTRL = 0x01;

//        print1("wait frame eof\n");
        
        // Loop until eof is set
        while ((*P_MPEG4_COMPRESS_CTRL & 0x02) == 0);
//        print1("frame eof active ...\n");

//---- dump encoded frame from MIU
		vlc_size=*P_MPEG4_VLCSIZE_HIGH;
		vlc_size=vlc_size<<8;
		vlc_size=vlc_size|*P_MPEG4_VLCSIZE_MID;
		vlc_size=vlc_size<<8;
		vlc_size=vlc_size|*P_MPEG4_VLCSIZE_LOW;
		return vlc_size;
}



void mp4_set_decode_frame_buffer_address(unsigned int  MP4WBuffAddrSrc,unsigned int TVBuffAddrDst,unsigned int unBuffSize)
{
    unsigned int ulSize;
    //---- Buffer control setting
	
    if(g_unMP4HW_RunMode==NORMAL_MODE)
    {
 #ifdef DECODE_SOFT_SWITCH_BUFF
        *P_BUFCTRL_BUFFER_SEL		= 0x0000;//0x1040;//using software(0)/hardware(1) to control buffer change
        *P_BUFCTRL_MODE_CTRL1		= 0x001A;//MP4 trigger TVE triple buffer switch    
 
 #else   	
        *P_BUFCTRL_BUFFER_SEL		= 0x1040;//0x1040;//using software(0)/hardware(1) to control buffer change
        *P_BUFCTRL_MODE_CTRL1		= 0x001b;//MP4 trigger TVE triple buffer switch    
 #endif       
    }
    else if(g_unMP4HW_RunMode==CONFERENCE_MODE)
    {
 #ifdef DECODE_SOFT_SWITCH_BUFF
        *P_BUFCTRL_BUFFER_SEL		= 0x0001;//0x1040;//using software(0)/hardware(1) to control buffer change
        *P_BUFCTRL_MODE_CTRL1		= 0x0007;//MP4 trigger TVE triple buffer switch         
 #else   	
        *P_BUFCTRL_BUFFER_SEL		= 0x1040;//0x1040;//using software(0)/hardware(1) to control buffer change
        *P_BUFCTRL_MODE_CTRL1		= 0x001b;//MP4 trigger TVE triple buffer switch    
 #endif   
    }
    else
    {
        //
    }

//    *P_TV_BUFFERA_SEL	= 0x00000001;
    if( (g_unMP4HW_dvWidth <= 320) && (g_unMP4HW_dvHigh <= 240))