[cvs] / xvidcore / src / utils / mem_transfer.c Repository:
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Diff of /xvidcore/src/utils/mem_transfer.c

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revision 1.5, Thu Sep 5 20:42:47 2002 UTC revision 1.10, Mon Mar 22 22:36:24 2004 UTC
# Line 3  Line 3 
3   *  XVID MPEG-4 VIDEO CODEC   *  XVID MPEG-4 VIDEO CODEC
4   *  - 8bit<->16bit transfer -   *  - 8bit<->16bit transfer -
5   *   *
6   *  Copyright(C) 2001-2002 Peter Ross <pross@cs.rmit.edu.au>   *  Copyright(C) 2001-2003 Peter Ross <pross@xvid.org>
  *  
  *  This program 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.  
7   *   *
8   *  This program is free software; you can redistribute it and/or modify   *  This program is free software; you can redistribute it and/or modify
9   *  it under the terms of the GNU General Public License as published by   *  it under the terms of the GNU General Public License as published by
# Line 41  Line 32 
32  TRANSFER_16TO8COPY_PTR transfer_16to8copy;  TRANSFER_16TO8COPY_PTR transfer_16to8copy;
33    
34  TRANSFER_8TO16SUB_PTR  transfer_8to16sub;  TRANSFER_8TO16SUB_PTR  transfer_8to16sub;
35    TRANSFER_8TO16SUBRO_PTR  transfer_8to16subro;
36  TRANSFER_8TO16SUB2_PTR transfer_8to16sub2;  TRANSFER_8TO16SUB2_PTR transfer_8to16sub2;
37  TRANSFER_16TO8ADD_PTR  transfer_16to8add;  TRANSFER_16TO8ADD_PTR  transfer_16to8add;
38    
# Line 145  Line 137 
137  }  }
138    
139    
140    void
141    transfer_8to16subro_c(int16_t * const dct,
142                                            const uint8_t * const cur,
143                                            const uint8_t * ref,
144                                            const uint32_t stride)
145    {
146            uint32_t i, j;
147    
148            for (j = 0; j < 8; j++) {
149                    for (i = 0; i < 8; i++) {
150                            uint8_t c = cur[j * stride + i];
151                            uint8_t r = ref[j * stride + i];
152                            dct[j * 8 + i] = (int16_t) c - (int16_t) r;
153                    }
154            }
155    }
156    
157    
158    
159  /*  /*
160   * C   - the current buffer   * C   - the current buffer
161   * R1  - the 1st reference buffer   * R1  - the 1st reference buffer
# Line 155  Line 166 
166   *   *
167   *    R1  (8bit) = R1   *    R1  (8bit) = R1
168   *    R2  (8bit) = R2   *    R2  (8bit) = R2
169   *    C   (8bit) = C   *    R   (temp) = min((R1 + R2)/2, 255)
170   *    DCT (16bit)= C - min((R1 + R2)/2, 255)   *    DCT (16bit)= C - R
171     *    C   (8bit) = R
172   */   */
173  void  void
174  transfer_8to16sub2_c(int16_t * const dct,  transfer_8to16sub2_c(int16_t * const dct,
# Line 175  Line 187 
187                          if (r > 255) {                          if (r > 255) {
188                                  r = 255;                                  r = 255;
189                          }                          }
190                          //cur[j * stride + i] = r;                          cur[j * stride + i] = r;
191                          dct[j * 8 + i] = (int16_t) c - (int16_t) r;                          dct[j * 8 + i] = (int16_t) c - (int16_t) r;
192                  }                  }
193          }          }
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