mbtransquant.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:12k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /******************************************************************************
- * *
- * This file is part of XviD, a free MPEG-4 video encoder/decoder *
- * *
- * XviD is an implementation of a part of one or more MPEG-4 Video tools *
- * as specified in ISO/IEC 14496-2 standard. Those intending to use this *
- * software module in hardware or software products are advised that its *
- * use may infringe existing patents or copyrights, and any such use *
- * would be at such party's own risk. The original developer of this *
- * software module and his/her company, and subsequent editors and their *
- * companies, will have no liability for use of this software or *
- * modifications or derivatives thereof. *
- * *
- * XviD is free software; you can redistribute it and/or modify it *
- * under the terms of the GNU General Public License as published by *
- * the Free Software Foundation; either version 2 of the License, or *
- * (at your option) any later version. *
- * *
- * XviD is distributed in the hope that it will be useful, but *
- * WITHOUT ANY WARRANTY; without even the implied warranty of *
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
- * GNU General Public License for more details. *
- * *
- * You should have received a copy of the GNU General Public License *
- * along with this program; if not, write to the Free Software *
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
- * *
- ******************************************************************************/
- /******************************************************************************
- * *
- * mbtransquant.c *
- * *
- * Copyright (C) 2001 - Peter Ross <pross@cs.rmit.edu.au> *
- * Copyright (C) 2001 - Michael Militzer <isibaar@xvid.org> *
- * *
- * For more information visit the XviD homepage: http://www.xvid.org *
- * *
- ******************************************************************************/
- /******************************************************************************
- * *
- * Revision history: *
- * *
- * 29.03.2002 interlacing speedup - used transfer strides instead of
- * manual field-to-frame conversion
- * 26.03.2002 interlacing support - moved transfers outside loops
- * 22.12.2001 get_dc_scaler() moved to common.h
- * 19.11.2001 introduced coefficient thresholding (Isibaar) *
- * 17.11.2001 initial version *
- * *
- ******************************************************************************/
- #include <string.h>
- #include "../portab.h"
- #include "mbfunctions.h"
- #include "../global.h"
- #include "mem_transfer.h"
- #include "timer.h"
- #include "../dct/fdct.h"
- #include "../dct/idct.h"
- #include "../quant/quant_mpeg4.h"
- #include "../quant/quant_h263.h"
- #include "../encoder.h"
- #define MIN(X, Y) ((X)<(Y)?(X):(Y))
- #define MAX(X, Y) ((X)>(Y)?(X):(Y))
- #define TOOSMALL_LIMIT 1 /* skip blocks having a coefficient sum below this value */
- /* this isnt pretty, but its better than 20 ifdefs */
- void MBTransQuantIntra(const MBParam *pParam,
- MACROBLOCK * pMB,
- const uint32_t x_pos,
- const uint32_t y_pos,
- int16_t data[6*64],
- int16_t qcoeff[6*64],
- IMAGE * const pCurrent)
- {
- uint32_t stride = pParam->edged_width;
- uint32_t stride2 = stride / 2;
- uint32_t next_block = stride * 8;
- uint32_t i;
- uint32_t iQuant = pParam->quant;
- uint8_t *pY_Cur, *pU_Cur, *pV_Cur;
- pY_Cur = pCurrent->y + (y_pos << 4) * stride + (x_pos << 4);
- pU_Cur = pCurrent->u + (y_pos << 3) * stride2 + (x_pos << 3);
- pV_Cur = pCurrent->v + (y_pos << 3) * stride2 + (x_pos << 3);
- start_timer();
- transfer_8to16copy(&data[0*64], pY_Cur, stride);
- transfer_8to16copy(&data[1*64], pY_Cur + 8, stride);
- transfer_8to16copy(&data[2*64], pY_Cur + next_block, stride);
- transfer_8to16copy(&data[3*64], pY_Cur + next_block + 8,stride);
- transfer_8to16copy(&data[4*64], pU_Cur, stride2);
- transfer_8to16copy(&data[5*64], pV_Cur, stride2);
- stop_transfer_timer();
- start_timer();
- pMB->field_dct = 0;
- if (pParam->global_flags & XVID_INTERLACING)
- {
- pMB->field_dct = MBDecideFieldDCT(data);
- }
- stop_interlacing_timer();
- for(i = 0; i < 6; i++)
- {
- uint32_t iDcScaler = get_dc_scaler(iQuant, i < 4);
- start_timer();
- fdct(&data[i*64]);
- stop_dct_timer();
- if (pParam->quant_type == H263_QUANT)
- {
- start_timer();
- quant_intra(&qcoeff[i*64], &data[i*64], iQuant, iDcScaler);
- stop_quant_timer();
- start_timer();
- dequant_intra(&data[i*64], &qcoeff[i*64], iQuant, iDcScaler);
- stop_iquant_timer();
- }
- else
- {
- start_timer();
- quant4_intra(&qcoeff[i*64], &data[i*64], iQuant, iDcScaler);
- stop_quant_timer();
- start_timer();
- dequant4_intra(&data[i*64], &qcoeff[i*64], iQuant, iDcScaler);
- stop_iquant_timer();
- }
- start_timer();
- idct(&data[i*64]);
- stop_idct_timer();
- }
- if (pMB->field_dct)
- {
- next_block = stride;
- stride *= 2;
- }
- start_timer();
- transfer_16to8copy(pY_Cur, &data[0*64], stride);
- transfer_16to8copy(pY_Cur + 8, &data[1*64], stride);
- transfer_16to8copy(pY_Cur + next_block, &data[2*64], stride);
- transfer_16to8copy(pY_Cur + next_block + 8, &data[3*64], stride);
- transfer_16to8copy(pU_Cur, &data[4*64], stride2);
- transfer_16to8copy(pV_Cur, &data[5*64], stride2);
- stop_transfer_timer();
- }
- uint8_t MBTransQuantInter(const MBParam *pParam,
- MACROBLOCK * pMB,
- const uint32_t x_pos, const uint32_t y_pos,
- int16_t data[6*64],
- int16_t qcoeff[6*64],
- IMAGE * const pCurrent)
- {
- uint32_t stride = pParam->edged_width;
- uint32_t stride2 = stride / 2;
- uint32_t next_block = stride * 8;
- uint32_t i;
- uint32_t iQuant = pParam->quant;
- uint8_t *pY_Cur, *pU_Cur, *pV_Cur;
- uint8_t cbp = 0;
- uint32_t sum;
- pY_Cur = pCurrent->y + (y_pos << 4) * stride + (x_pos << 4);
- pU_Cur = pCurrent->u + (y_pos << 3) * stride2 + (x_pos << 3);
- pV_Cur = pCurrent->v + (y_pos << 3) * stride2 + (x_pos << 3);
- start_timer();
- pMB->field_dct = 0;
- if (pParam->global_flags & XVID_INTERLACING)
- {
- pMB->field_dct = MBDecideFieldDCT(data);
- }
- stop_interlacing_timer();
- for(i = 0; i < 6; i++)
- {
- /*
- * no need to transfer 8->16-bit
- * (this is performed already in motion compensation)
- */
- start_timer();
- fdct(&data[i*64]);
- stop_dct_timer();
- if (pParam->quant_type == 0)
- {
- start_timer();
- sum = quant_inter(&qcoeff[i*64], &data[i*64], iQuant);
- stop_quant_timer();
- }
- else
- {
- start_timer();
- sum = quant4_inter(&qcoeff[i*64], &data[i*64], iQuant);
- stop_quant_timer();
- }
- if(sum >= TOOSMALL_LIMIT) { // skip block ?
- if (pParam->quant_type == H263_QUANT)
- {
- start_timer();
- dequant_inter(&data[i*64], &qcoeff[i*64], iQuant);
- stop_iquant_timer();
- }
- else
- {
- start_timer();
- dequant4_inter(&data[i*64], &qcoeff[i*64], iQuant);
- stop_iquant_timer();
- }
- cbp |= 1 << (5 - i);
- start_timer();
- idct(&data[i*64]);
- stop_idct_timer();
- }
- }
- if (pMB->field_dct)
- {
- next_block = stride;
- stride *= 2;
- }
- start_timer();
- if (cbp & 32)
- transfer_16to8add(pY_Cur, &data[0*64], stride);
- if (cbp & 16)
- transfer_16to8add(pY_Cur + 8, &data[1*64], stride);
- if (cbp & 8)
- transfer_16to8add(pY_Cur + next_block, &data[2*64], stride);
- if (cbp & 4)
- transfer_16to8add(pY_Cur + next_block + 8, &data[3*64], stride);
- if (cbp & 2)
- transfer_16to8add(pU_Cur, &data[4*64], stride2);
- if (cbp & 1)
- transfer_16to8add(pV_Cur, &data[5*64], stride2);
- stop_transfer_timer();
- return cbp;
- }
- /* if sum(diff between field lines) < sum(diff between frame lines), use field dct */
- #define ABS(X) (X)<0 ? -(X) : (X)
- uint32_t MBDecideFieldDCT(int16_t data[6*64])
- {
- const uint8_t blocks[] = {0*64, 0*64, 0*64, 0*64, 2*64, 2*64, 2*64, 2*64};
- const uint8_t lines[] = {0, 16, 32, 48, 0, 16, 32, 48};
- int frame = 0, field = 0;
- int i, j;
- for (i=0 ; i<7 ; ++i)
- {
- for (j=0 ; j<8 ; ++j)
- {
- frame += ABS(data[0*64 + (i+1)*8 + j] - data[0*64 + i*8 + j]);
- frame += ABS(data[1*64 + (i+1)*8 + j] - data[1*64 + i*8 + j]);
- frame += ABS(data[2*64 + (i+1)*8 + j] - data[2*64 + i*8 + j]);
- frame += ABS(data[3*64 + (i+1)*8 + j] - data[3*64 + i*8 + j]);
- field += ABS(data[blocks[i+1] + lines[i+1] + j] -
- data[blocks[i ] + lines[i ] + j]);
- field += ABS(data[blocks[i+1] + lines[i+1] + 8 + j] -
- data[blocks[i ] + lines[i ] + 8 + j]);
- field += ABS(data[blocks[i+1] + 64 + lines[i+1] + j] -
- data[blocks[i ] + 64 + lines[i ] + j]);
- field += ABS(data[blocks[i+1] + 64 + lines[i+1] + 8 + j] -
- data[blocks[i ] + 64 + lines[i ] + 8 + j]);
- }
- }
- if (frame > field)
- {
- MBFrameToField(data);
- }
- return (frame > field);
- }
- /* deinterlace Y blocks vertically */
- #define MOVLINE(X,Y) memcpy(X, Y, sizeof(tmp))
- #define LINE(X,Y) &data[X*64 + Y*8]
- void MBFrameToField(int16_t data[6*64])
- {
- int16_t tmp[8];
- /* left blocks */
- // 1=2, 2=4, 4=8, 8=1
- MOVLINE(tmp, LINE(0,1));
- MOVLINE(LINE(0,1), LINE(0,2));
- MOVLINE(LINE(0,2), LINE(0,4));
- MOVLINE(LINE(0,4), LINE(2,0));
- MOVLINE(LINE(2,0), tmp);
- // 3=6, 6=12, 12=9, 9=3
- MOVLINE(tmp, LINE(0,3));
- MOVLINE(LINE(0,3), LINE(0,6));
- MOVLINE(LINE(0,6), LINE(2,4));
- MOVLINE(LINE(2,4), LINE(2,1));
- MOVLINE(LINE(2,1), tmp);
- // 5=10, 10=5
- MOVLINE(tmp, LINE(0,5));
- MOVLINE(LINE(0,5), LINE(2,2));
- MOVLINE(LINE(2,2), tmp);
- // 7=14, 14=13, 13=11, 11=7
- MOVLINE(tmp, LINE(0,7));
- MOVLINE(LINE(0,7), LINE(2,6));
- MOVLINE(LINE(2,6), LINE(2,5));
- MOVLINE(LINE(2,5), LINE(2,3));
- MOVLINE(LINE(2,3), tmp);
- /* right blocks */
- // 1=2, 2=4, 4=8, 8=1
- MOVLINE(tmp, LINE(1,1));
- MOVLINE(LINE(1,1), LINE(1,2));
- MOVLINE(LINE(1,2), LINE(1,4));
- MOVLINE(LINE(1,4), LINE(3,0));
- MOVLINE(LINE(3,0), tmp);
- // 3=6, 6=12, 12=9, 9=3
- MOVLINE(tmp, LINE(1,3));
- MOVLINE(LINE(1,3), LINE(1,6));
- MOVLINE(LINE(1,6), LINE(3,4));
- MOVLINE(LINE(3,4), LINE(3,1));
- MOVLINE(LINE(3,1), tmp);
- // 5=10, 10=5
- MOVLINE(tmp, LINE(1,5));
- MOVLINE(LINE(1,5), LINE(3,2));
- MOVLINE(LINE(3,2), tmp);
- // 7=14, 14=13, 13=11, 11=7
- MOVLINE(tmp, LINE(1,7));
- MOVLINE(LINE(1,7), LINE(3,6));
- MOVLINE(LINE(3,6), LINE(3,5));
- MOVLINE(LINE(3,5), LINE(3,3));
- MOVLINE(LINE(3,3), tmp);
- }