xvid.c

用MPEG-4对YUV视频文件编码压缩成divx视频文件

/*****************************************************************************
 *
 *  History
 *
 *	- 23.06.2002	added XVID_CPU_CHKONLY
 *  - 17.03.2002	Added interpolate8x8_halfpel_hv_xmm
 *  - 22.12.2001  API change: added xvid_init() - Isibaar
 *  - 16.12.2001	inital version; (c)2001 peter ross <[e-mail]>
 *
 *  $Id: xvid.c,v 1.23 2002/06/26 15:59:51 ia64p Exp $
 *
 ****************************************************************************/
#include "user_macro.h"
#include "xvid.h"
#include "encoder.h"
#include "bitstream/cbp.h"
#include "dct/idct.h"
#include "dct/fdct.h"
#include "image/interpolate8x8.h"
#include "utils/mem_transfer.h"
/*#include "quant/quant_h263.h"*/
#include "quant/quant_mpeg4.h"
#include "motion/sad.h"
#include "utils/timer.h"
#include "bitstream/mbcoding.h"

/*****************************************************************************
 * XviD Init Entry point
 *
 * Well this function initialize all internal function pointers according
 * to the CPU features forced by the library client or autodetected (depending
 * on the XVID_CPU_FORCE flag). It also initializes vlc coding tables and all
 * image colorspace transformation tables.
 * 
 *
 ****************************************************************************/
void xvid_init(void)

{
	/* Initialize the function pointers */
	/*idct_int32_init();*/
	init_vlc_tables();

	/* Fixed Point Forward/Inverse DCT transformations */
#ifndef _TRIMEDIA	
	fdct = fdct_int32;
	idct = idct_int32;
	idct_int32_init();
#else	
	fdct =  dct8x8fix;
	idct = idct8x8fix;
#endif

	/* Only needed on PPC Altivec archs */
/*	sadInit = 0;*/

	/* Quantization functions */
/*	quant_intra   = quant_intra_c;
	dequant_intra = dequant_intra_c;
	quant_inter   = quant_inter_c;
	dequant_inter = dequant_inter_c;*/

	quant4_intra   = quant4_intra_c;
	dequant4_intra = dequant4_intra_c;
	quant4_inter   = quant4_inter_c;
	dequant4_inter = dequant4_inter_c;

	/* Block transfer related functions */
	transfer_8to16copy = transfer_8to16copy_c;
	transfer_16to8copy = transfer_16to8copy_c;
	transfer_8to16sub  = transfer_8to16sub_c;


	transfer_16to8add  = transfer_16to8add_c;
	transfer8x8_copy   = transfer8x8_copy_c;

	/* Image interpolation related functions */
	interpolate8x8_halfpel_h  = interpolate8x8_halfpel_h_c;
	interpolate8x8_halfpel_v  = interpolate8x8_halfpel_v_c;
	interpolate8x8_halfpel_hv = interpolate8x8_halfpel_hv_c;

	/* Functions used in motion estimation algorithms */
	calc_cbp = calc_cbp_c;
	sad16    = sad16_c;
/*	sad16bi  = sad16bi_c;*/
	sad8     = sad8_c;
	dev16    = dev16_c;
}