jccoefct.c

基于Linux的ffmepg decoder

/*
 * jccoefct.c
 *
 * Copyright (C) 1994-1997, Thomas G. Lane.
 * This file is part of the Independent JPEG Group's software.
 * For conditions of distribution and use, see the accompanying README file.
 *
 * This file contains the coefficient buffer controller for compression.
 * This controller is the top level of the JPEG compressor proper.
 * The coefficient buffer lies between forward-DCT and entropy encoding steps.
 */

#define JPEG_INTERNALS
#include "jinclude.h"
#include "jpeglib.h"


/* We use a full-image coefficient buffer when doing Huffman optimization,
 * and also for writing multiple-scan JPEG files.  In all cases, the DCT
 * step is run during the first pass, and subsequent passes need only read
 * the buffered coefficients.
 */
#ifdef ENTROPY_OPT_SUPPORTED
#define FULL_COEF_BUFFER_SUPPORTED
#else
#ifdef C_MULTISCAN_FILES_SUPPORTED
#define FULL_COEF_BUFFER_SUPPORTED
#endif
#endif


/* Private buffer controller object */

typedef struct {
  struct jpeg_c_coef_controller pub; /* public fields */

  JDIMENSION iMCU_row_num;	/* iMCU row # within image */
  JDIMENSION mcu_ctr;		/* counts MCUs processed in current row */
  int MCU_vert_offset;		/* counts MCU rows within iMCU row */
  int MCU_rows_per_iMCU_row;	/* number of such rows needed */

  /* For single-pass compression, it's sufficient to buffer just one MCU
   * (although this may prove a bit slow in practice).  We allocate a
   * workspace of C_MAX_BLOCKS_IN_MCU coefficient blocks, and reuse it for each
   * MCU constructed and sent.  (On 80x86, the workspace is FAR even though
   * it's not really very big; this is to keep the module interfaces unchanged
   * when a large coefficient buffer is necessary.)
   * In multi-pass modes, this array points to the current MCU's blocks
   * within the virtual arrays.
   */
  JBLOCKROW MCU_buffer[C_MAX_BLOCKS_IN_MCU];

  /* In multi-pass modes, we need a virtual block array for each component. */
  jvirt_barray_ptr whole_image[MAX_COMPONENTS];
} my_coef_controller;

typedef my_coef_controller * my_coef_ptr;



LOCAL(void)
start_iMCU_row (j_compress_ptr cinfo)
/* Reset within-iMCU-row counters for a new row */
{
  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;

  /* In an interleaved scan, an MCU row is the same as an iMCU row.
   * In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows.
   * But at the bottom of the image, process only what's left.
   */
  if (cinfo->comps_in_scan > 1) {
    coef->MCU_rows_per_iMCU_row = 1;
  } else {
    if (coef->iMCU_row_num < (cinfo->total_iMCU_rows-1))
      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor;
    else
      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height;
  }

  coef->mcu_ctr = 0;
  coef->MCU_vert_offset = 0;
}


/*
 * Initialize for a processing pass.
 */

METHODDEF(void)
start_pass_coef (j_compress_ptr cinfo, J_BUF_MODE pass_mode)
{
  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;

  coef->iMCU_row_num = 0;
  start_iMCU_row(cinfo);

}

/*
 * Process some data in the single-pass case.
 * We process the equivalent of one fully interleaved MCU row ("iMCU" row)
 * per call, ie, v_samp_factor block rows for each component in the image.
 * Returns TRUE if the iMCU row is completed, FALSE if suspended.
 *
 * NB: input_buf contains a plane for each component in image,
 * which we index according to the component's SOF position.
 */
//The pipelineed stage is rearranged
boolean compress_data1 (j_compress_ptr cinfo)
{
  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
  //JDIMENSION MCU_col_num;	/* index of current MCU within row */
  unsigned int MCU_col_num;
  JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1; 
  //unsigned int DCT_col_num; 
  
  #ifdef VPE_OUTPUT
  unsigned int *vpe_stop = (unsigned int *) (VPE);
  #endif
  volatile MDMA *pmdma = MDMA1;
  
  if(YUVsampling==0 | YUVsampling==1 | YUVsampling==3 | YUVsampling==4){		//if YUVsampling!=2

  DMA_mcu(cinfo, coef->mcu_ctr, last_MCU_col, rinfo.Dma_bnum);

     for (MCU_col_num = coef->mcu_ctr; MCU_col_num <= last_MCU_col;
	 MCU_col_num++) {		//pwhsu:20031017	For this case:0~14

		 if(rinfo.nCount==0){
			#ifdef VPE_OUTPUT
			*vpe_stop =  0x90000000 | cMCUrow<<4 | MCU_col_num;	//pwhsu++:20040128
			#endif
			

			while((pmdma->Status & 0x1) == 0)	//DMA process run
			{}
	
			pmdma->CCA = CCATmp0;
			pmdma->Control = dmactrl;	//0xa<<20			//start DMA	

			rinfo.Dma_bnum = (rinfo.Dma_bnum+1)&1;
			
			if(MCU_col_num==0){
				DMA_COMMAND_local[rinfo.Dma_bnum*40] = DMA_COMMAND_local[rinfo.Dma_bnum*40+20];
				DMA_COMMAND_local[rinfo.Dma_bnum*40+4] = DMA_COMMAND_local[rinfo.Dma_bnum*40+24];
				DMA_COMMAND_local[rinfo.Dma_bnum*40+8] = DMA_COMMAND_local[rinfo.Dma_bnum*40+28];
			}			

			if(rinfo.nCount==rinfo.MCUnum-1){

				//__asm{	//check the write procedure is done 
					//MCR p15, 0, 0, c7, c10, 4
				//}
				FA526_DrainWriteBuffer();

				while((pmdma->Status & 0x1) == 0){}
                #ifdef VPE_OUTPUT
				*vpe_stop =  0x90000000 | cMCUrow<<4 | MCU_col_num;	//pwhsu++:20040128
				#endif

				pbufaddr = (unsigned int *)(cur_b0 + rinfo.Coef_bnum * stride_MCU);			 
				rinfo.Coef_bnum =  (rinfo.Coef_bnum+1)&1;  //switch the pixel buffer number
				//__asm {
					SET_MCCADDR(pbufaddr)
					SET_MCCTL(mcctrl)
				//}

				//__asm{	//check the write procedure is done 
					//MCR p15, 0, 0, c7, c10, 4
				//}
				FA526_DrainWriteBuffer();

				//__asm{
					//vlc_enc6:
					//READ_CPSTS(sreg)				
					//ANDS     sreg, sreg, #32
					//BEQ		 vlc_enc6
				//}
				do {
                  READ_CPSTS(sreg)
                } while(!(sreg&32));

			}

		 }else if (rinfo.nCount==1){
			
			pbufaddr = (unsigned int *)(cur_b0 + rinfo.Coef_bnum * stride_MCU);		//MC_go
			rinfo.Coef_bnum =  (rinfo.Coef_bnum+1)&1;
			 
			while((pmdma->Status & 0x1) == 0)	//DMA process run
			{}									

			//__asm {		
				SET_MCCADDR(pbufaddr)
				SET_MCCTL(mcctrl)				
			//}
            #ifdef VPE_OUTPUT
			*vpe_stop =  0x90000000 | cMCUrow<<4 | MCU_col_num;	
            #endif

			pmdma->CCA = CCATmp1;
			pmdma->Control =  dmactrl;		//start DMA	

			rinfo.Dma_bnum = (rinfo.Dma_bnum+1)&1;


		}else {		
  			pbufaddr = (unsigned int *)(cur_b0 + rinfo.Coef_bnum * stride_MCU);		//MC_go
			rinfo.Coef_bnum =  (rinfo.Coef_bnum+1)&1;
			
			//__asm{
				//vlc_enc:
				//READ_CPSTS(sreg)				
			    //ANDS     sreg, sreg, #32
				//BEQ		 vlc_enc
			//}
			
			do {
              READ_CPSTS(sreg)
            } while(!(sreg&32));
            
			while((pmdma->Status & 0x1) == 0)	//DMA process run
			{}			
			
			if(cinfo->restart_interval)
				Encode_mcu (cinfo);
				
			SET_MCCADDR(pbufaddr)
			SET_MCCTL(mcctrl)			
			
			#ifdef VPE_OUTPUT
			*vpe_stop =  0x90000000 | cMCUrow<<4 | MCU_col_num;	
            #endif
			//pmdma->BlkWidth = 0;
			
		    pmdma->CCA = CCATmp0 + rinfo.Dma_bnum*160;//(((unsigned int) DMA_COMMAND_local + rinfo.Dma_bnum*160)&0xfffffff0) | 0x2;
			pmdma->Control =  dmactrl;		//start DMA	
           
			rinfo.Dma_bnum = (rinfo.Dma_bnum+1)&1;

			if(MCU_col_num==0){
				DMA_COMMAND_local[rinfo.Dma_bnum*40] = DMA_COMMAND_local[rinfo.Dma_bnum*40+20];
				DMA_COMMAND_local[rinfo.Dma_bnum*40+4] = DMA_COMMAND_local[rinfo.Dma_bnum*40+24];
				DMA_COMMAND_local[rinfo.Dma_bnum*40+8] = DMA_COMMAND_local[rinfo.Dma_bnum*40+28];
			}

		}


			//pwhsu++:20031031
			rinfo.nCount+=1;//pwhsu++:20031030
	     }//end of for MCU_col_num

		 }else{		//YUVsampling==2


  DMA_mcu(cinfo, coef->mcu_ctr, last_MCU_col, rinfo.Dma_bnum);

     for (MCU_col_num = coef->mcu_ctr; MCU_col_num <= last_MCU_col;
	 MCU_col_num++) {		//pwhsu:20031017	For this case:0~14

		 if(rinfo.nCount==0){
			#ifdef VPE_OUTPUT
			*vpe_stop =  0x90000000 | cMCUrow<<4 | MCU_col_num;	//pwhsu++:20040128
            #endif

			
			while((pmdma->Status & 0x1) == 0)	//DMA process run
			{}
			//pmdma->BlkWidth = 0;	
			pmdma->CCA = CCATmp0;//(((unsigned int) DMA_COMMAND_local + rinfo.Dma_bnum*160)&0xfffffff0) | 0x2;
			pmdma->Control = dmactrl;	//0xa<<20			//start DMA	

			rinfo.Dma_bnum = (rinfo.Dma_bnum+1)&1;
			
			if(MCU_col_num==0){
				DMA_COMMAND_local[rinfo.Dma_bnum*40] = DMA_COMMAND_local[rinfo.Dma_bnum*40+20];
				DMA_COMMAND_local[rinfo.Dma_bnum*40+4] = DMA_COMMAND_local[rinfo.Dma_bnum*40+24];
				DMA_COMMAND_local[rinfo.Dma_bnum*40+8] = DMA_COMMAND_local[rinfo.Dma_bnum*40+28];
			}			

			if(rinfo.nCount==rinfo.MCUnum-1){

				//__asm{	//check the write procedure is done 
					//MCR p15, 0, 0, c7, c10, 4
				//}
				FA526_DrainWriteBuffer();
         
				while((pmdma->Status & 0x1) == 0){}
                #ifdef VPE_OUTPUT
				*vpe_stop =  0x90000000 | cMCUrow<<4 | MCU_col_num;	//pwhsu++:20040128
                #endif
				pbufaddr = (unsigned int *)(cur_b0 + rinfo.Coef_bnum * stride_MCU);			 
				rinfo.Coef_bnum =  (rinfo.Coef_bnum+1)&1;  //switch the pixel buffer number
				//__asm {
					SET_MCCADDR(pbufaddr)
					SET_MCCTL(mcctrl)
				//}

				//__asm{	//check the write procedure is done 
					//MCR p15, 0, 0, c7, c10, 4
				//}
				FA526_DrainWriteBuffer();

				//__asm{
					//vlc_enc20:
					//READ_CPSTS(sreg)				
					//ANDS     sreg, sreg, #32
					//BEQ		 vlc_enc20
				//}
				do {
                  READ_CPSTS(sreg)
                } while(!(sreg&32));
			}

		 }else if (rinfo.nCount==1){
			
			pbufaddr = (unsigned int *)(cur_b0 + rinfo.Coef_bnum * stride_MCU);		//MC_go
			rinfo.Coef_bnum =  (rinfo.Coef_bnum+1)&1;
			 

			while((pmdma->Status & 0x1) == 0)	//DMA process run
			{}	
			//pmdma->BlkWidth = 0;
			pmdma->CCA = CCATmp1;//(((unsigned int) DMA_COMMAND_local + rinfo.Dma_bnum*160)&0xfffffff0) | 0x2;
			pmdma->Control =  dmactrl;		//start DMA	

			//__asm {		
				SET_MCCADDR(pbufaddr)
				SET_MCCTL(mcctrl)				
			//}

			rinfo.Dma_bnum = (rinfo.Dma_bnum+1)&1;
            #ifdef VPE_OUTPUT
			*vpe_stop =  0x90000000 | cMCUrow<<4 | MCU_col_num;	
			#endif



		}else {



  			pbufaddr = (unsigned int *)(cur_b0 + rinfo.Coef_bnum * stride_MCU);		//MC_go
			rinfo.Coef_bnum =  (rinfo.Coef_bnum+1)&1;

			//pmdma->CCA = CCATmp0 + rinfo.Dma_bnum*160;

			//__asm{
				//vlc_enc21:
				//READ_CPSTS(sreg)				
			    //ANDS     sreg, sreg, #32
				//BEQ		 vlc_enc21
			//}
			do {
              READ_CPSTS(sreg)
            } while(!(sreg&32));

			if(cinfo->restart_interval)
				Encode_mcu (cinfo);

			
			while((pmdma->Status & 0x1) == 0)	//DMA process run
			{}			
			//pmdma->BlkWidth = 0;
			pmdma->CCA = CCATmp0 + rinfo.Dma_bnum*160;//(((unsigned int) DMA_COMMAND_local + rinfo.Dma_bnum*160)&0xfffffff0) | 0x2;
			pmdma->Control =  dmactrl;		//start DMA	
			
			//__asm {
				SET_MCCADDR(pbufaddr)
				SET_MCCTL(mcctrl)				
			//}
			#ifdef VPE_OUTPUT
			*vpe_stop =  0x90000000 | cMCUrow<<4 | MCU_col_num;	
			#endif
			rinfo.Dma_bnum = (rinfo.Dma_bnum+1)&1;

			if(MCU_col_num==0){
				DMA_COMMAND_local[rinfo.Dma_bnum*40] = DMA_COMMAND_local[rinfo.Dma_bnum*40+20];
				DMA_COMMAND_local[rinfo.Dma_bnum*40+4] = DMA_COMMAND_local[rinfo.Dma_bnum*40+24];
				DMA_COMMAND_local[rinfo.Dma_bnum*40+8] = DMA_COMMAND_local[rinfo.Dma_bnum*40+28];
			}



		}


			//pwhsu++:20031031
			rinfo.nCount+=1;//pwhsu++:20031030
	     }//end of for MCU_col_num

		 }//YUVsampling




  return TRUE;
}


/*
 * Initialize coefficient buffer controller.
 */

GLOBAL(void)
jinit_c_coef_controller (j_compress_ptr cinfo, boolean need_full_buffer)
{
  my_coef_ptr coef;

  coef = (my_coef_ptr)
    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
				SIZEOF(my_coef_controller));
  cinfo->coef = (struct jpeg_c_coef_controller *) coef;
  coef->pub.start_pass = start_pass_coef;

}



void
DMA_mcu(j_compress_ptr cinfo,unsigned int MCU_col_num, 
			unsigned int last_MCU_col, int dbnum)
{
	int blkn, xpos, ci; //int blkn, xpos, ypos, ci, blockcnt, yindex;
	int xpos1;
	jpeg_component_info *compptr;
	//int cmdidx;
	unsigned char* puchexin, *pucdataptr, *pucdataptr1;
	//unsigned int uintpos;
	int sysdataidx;
	blkn = 0;	
	sysdataidx = dbnum*40;

	for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
		puchexin = curdata[ci];
		compptr = cinfo->cur_comp_info[ci];

		xpos = MCU_col_num * compptr->MCU_sample_width;
		xpos1 = (MCU_col_num+1) * compptr->MCU_sample_width;		

		pucdataptr = puchexin + (cMCUrow*mcu_height[ci])*comp_width[ci] + xpos;
		pucdataptr1 = puchexin + (cMCUrow*mcu_height[ci])*comp_width[ci] + xpos1;


	
		switch(MCU_comb){
		case JCS_yuv420:
			if(ci==0){
				DMA_COMMAND_local[dbnum*40] = (unsigned int) pucdataptr | 2;
				DMA_COMMAND_local[((dbnum+1)&0x1)*40+20] = (unsigned int) pucdataptr1 | 2;
			}else{
				DMA_COMMAND_local[ci*4+dbnum*40] = (unsigned int) pucdataptr | 1;
				DMA_COMMAND_local[ci*4+((dbnum+1)&0x1)*40+20] = (unsigned int) pucdataptr1 | 1;			
			}
			break;
		case JCS_yuv422:
			if(ci==0){
				DMA_COMMAND_local[dbnum*40] = (unsigned int) pucdataptr | 4;
				DMA_COMMAND_local[((dbnum+1)&0x1)*40+20] = (unsigned int) pucdataptr1 | 4;
			}else{
				DMA_COMMAND_local[ci*4+dbnum*40] = (unsigned int) pucdataptr | 2;
				DMA_COMMAND_local[ci*4+((dbnum+1)&0x1)*40+20] = (unsigned int) pucdataptr1 | 2;			
			}				
			break;
		case JCS_yuv211:

			if(ci==0){
				DMA_COMMAND_local[dbnum*40] = (unsigned int) pucdataptr | 2;
			    DMA_COMMAND_local[((dbnum+1)&0x1)*40+20] = (unsigned int) pucdataptr1 | 2;
			}else{
				DMA_COMMAND_local[ci*4+dbnum*40] = (unsigned int) pucdataptr | 1;
			    DMA_COMMAND_local[ci*4+((dbnum+1)&0x1)*40+20] = (unsigned int) pucdataptr1 | 1;
			}
			break;
		case JCS_yuv333:
			DMA_COMMAND_local[ci*4+dbnum*40] = (unsigned int) pucdataptr | 3;
			DMA_COMMAND_local[ci*4+((dbnum+1)&0x1)*40+20] = (unsigned int) pucdataptr1 | 3;

			break;
		case JCS_yuv222:
			DMA_COMMAND_local[ci*4+dbnum*40] = (unsigned int) pucdataptr | 2;
			DMA_COMMAND_local[ci*4+((dbnum+1)&0x1)*40+20] = (unsigned int) pucdataptr1 | 2;

			break;
		case JCS_yuv111:
			DMA_COMMAND_local[ci*4+dbnum*40] = (unsigned int) pucdataptr | 1;
			DMA_COMMAND_local[ci*4+((dbnum+1)&0x1)*40+20] = (unsigned int) pucdataptr1 | 1;

			break;
		default:
			if(ci==0){
				DMA_COMMAND_local[dbnum*40] = (unsigned int) pucdataptr | 2;
				DMA_COMMAND_local[((dbnum+1)&0x1)*40+20] = (unsigned int) pucdataptr1 | 2;
			}else{
				DMA_COMMAND_local[ci*4+dbnum*40] = (unsigned int) pucdataptr | 1;
				DMA_COMMAND_local[ci*4+((dbnum+1)&0x1)*40+20] = (unsigned int) pucdataptr1 | 1;			
			}
			break;
		}



	}// end of ci

}