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revision 195, Wed Jun 12 20:38:41 2002 UTC revision 1583, Sun Dec 19 13:16:50 2004 UTC
# Line 1  Line 1 
1  /**************************************************************************  /*****************************************************************************
2   *   *
3   *      XVID MPEG-4 VIDEO CODEC   *      XVID MPEG-4 VIDEO CODEC
4   *      8bit<->16bit transfer   *  - 8bit<->16bit transfer  -
5   *   *
6   *      This program is an implementation of a part of one or more MPEG-4   *  Copyright(C) 2001-2003 Peter Ross <pross@xvid.org>
  *      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 24  Line 17 
17   *   *
18   *      You should have received a copy of the GNU General Public License   *      You should have received a copy of the GNU General Public License
19   *      along with this program; if not, write to the Free Software   *      along with this program; if not, write to the Free Software
20   *      Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.   *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  *  
  *************************************************************************/  
   
 /**************************************************************************  
21   *   *
22   *      History:   * $Id: mem_transfer.c,v 1.12 2004-12-19 13:16:50 syskin Exp $
23   *   *
24   *      14.04.2002      added transfer_8to16sub2   ****************************************************************************/
25   *      07.01.2002      merge functions from compensate; rename functions  
26   *      22.12.2001      transfer_8to8add16 limit fix  #include "../global.h"
27   *      07.11.2001      initial version; (c)2001 peter ross <pross@cs.rmit.edu.au>  #include "mem_transfer.h"
28    
29   *************************************************************************/  /* Function pointers - Initialized in the xvid.c module */
30    
31    TRANSFER_8TO16COPY_PTR transfer_8to16copy;
32    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_8TO16SUB2RO_PTR transfer_8to16sub2ro;
38  TRANSFER_16TO8ADD_PTR  transfer_16to8add;  TRANSFER_16TO8ADD_PTR  transfer_16to8add;
39    
40  // function pointers  TRANSFER8X8_COPY_PTR transfer8x8_copy;
41    
42    
43  /*****************************************************************************  /*****************************************************************************
44   *   *
45  TRANSFER_8TO16SUB_PTR transfer_8to16sub;   * All these functions are used to transfer data from a 8 bit data array
46   * to a 16 bit data array.   * to a 16 bit data array.
47  TRANSFER_16TO8ADD_PTR transfer_16to8add;   *
48   * This is typically used during motion compensation, that's why some   * This is typically used during motion compensation, that's why some
49   * functions also do the addition/substraction of another buffer during the   * functions also do the addition/substraction of another buffer during the
50   * so called  transfer.   * so called  transfer.
51   *   *
52     ****************************************************************************/
53    
54    /*
55     * SRC - the source buffer
56     * DST - the destination buffer
57     *
58     * Then the function does the 8->16 bit transfer and this serie of operations :
59     *
60     *    SRC (8bit)  = SRC
61     *    DST (16bit) = SRC
62   */   */
63    void
64    transfer_8to16copy_c(int16_t * const dst,
65                                             const uint8_t * const src,
66                                             uint32_t stride)
67    {
68            uint32_t i, j;
69    
70            for (j = 0; j < 8; j++) {
71                    for (i = 0; i < 8; i++) {
72                          dst[j * 8 + i] = (int16_t) src[j * stride + i];                          dst[j * 8 + i] = (int16_t) src[j * stride + i];
73                  }                  }
74          }          }
# Line 69  Line 83 
83   *    SRC (16bit) = SRC   *    SRC (16bit) = SRC
84   *    DST (8bit)  = max(min(SRC, 255), 0)   *    DST (8bit)  = max(min(SRC, 255), 0)
85   */   */
86    void
87    transfer_16to8copy_c(uint8_t * const dst,
88                                             const int16_t * const src,
89                                             uint32_t stride)
90    {
91            uint32_t i, j;
92    
93            for (j = 0; j < 8; j++) {
94                    for (i = 0; i < 8; i++) {
95                          int16_t pixel = src[j * 8 + i];                          int16_t pixel = src[j * 8 + i];
96    
97                          if (pixel < 0) {                          if (pixel < 0) {
# Line 95  Line 117 
117   *    R   (8bit)  = R   *    R   (8bit)  = R
118   *    C   (8bit)  = R   *    C   (8bit)  = R
119   *    DCT (16bit) = C - R   *    DCT (16bit) = C - R
   perform motion compensation (and 8bit->16bit dct transfer)  
   ... with write back  
120  */  */
121    void
122    transfer_8to16sub_c(int16_t * const dct,
123                                            uint8_t * const cur,
124                                            const uint8_t * ref,
125                                            const uint32_t stride)
126    {
127            uint32_t i, j;
128    
129            for (j = 0; j < 8; j++) {
130                  for (i = 0; i < 8; i++) {                  for (i = 0; i < 8; i++) {
131                          uint8_t c = cur[j * stride + i];                          uint8_t c = cur[j * stride + i];
132                          uint8_t r = ref[j * stride + i];                          uint8_t r = ref[j * stride + i];
# Line 109  Line 138 
138  }  }
139    
140    
141    void
142    transfer_8to16subro_c(int16_t * const dct,
143                                            const uint8_t * const cur,
144                                            const uint8_t * ref,
145                                            const uint32_t stride)
146    {
147            uint32_t i, j;
148    
149            for (j = 0; j < 8; j++) {
150                    for (i = 0; i < 8; i++) {
151                            uint8_t c = cur[j * stride + i];
152                            uint8_t r = ref[j * stride + i];
153                            dct[j * 8 + i] = (int16_t) c - (int16_t) r;
154                    }
155            }
156    }
157    
158    
159    
160  /*  /*
161   * C   - the current buffer   * C   - the current buffer
162   * R1  - the 1st reference buffer   * R1  - the 1st reference buffer
# Line 119  Line 167 
167   *   *
168   *    R1  (8bit) = R1   *    R1  (8bit) = R1
169   *    R2  (8bit) = R2   *    R2  (8bit) = R2
170    performs bi motion compensation (and 8bit->16bit dct transfer)   *    R   (temp) = min((R1 + R2)/2, 255)
171    .. but does not write back   *    DCT (16bit)= C - R
172     *    C   (8bit) = R
173  */  */
174    void
175    transfer_8to16sub2_c(int16_t * const dct,
176                                             uint8_t * const cur,
177                                             const uint8_t * ref1,
178                                             const uint8_t * ref2,
179                                             const uint32_t stride)
180    {
181            uint32_t i, j;
182    
183          for (j = 0; j < 8; j++) {          for (j = 0; j < 8; j++) {
184                  for (i = 0; i < 8; i++) {                  for (i = 0; i < 8; i++) {
185                          uint8_t c = cur[j * stride + i];                          uint8_t c = cur[j * stride + i];
# Line 130  Line 188 
188                          if (r > 255) {                          if (r > 255) {
189                                  r = 255;                                  r = 255;
190                          }                          }
191                          //cur[j * stride + i] = r;                          cur[j * stride + i] = r;
192                            dct[j * 8 + i] = (int16_t) c - (int16_t) r;
193                    }
194            }
195    }
196    
197    void
198    transfer_8to16sub2ro_c(int16_t * const dct,
199                                             const uint8_t * const cur,
200                                             const uint8_t * ref1,
201                                             const uint8_t * ref2,
202                                             const uint32_t stride)
203    {
204            uint32_t i, j;
205    
206            for (j = 0; j < 8; j++) {
207                    for (i = 0; i < 8; i++) {
208                            uint8_t c = cur[j * stride + i];
209                            int r = (ref1[j * stride + i] + ref2[j * stride + i] + 1) / 2;
210                          dct[j * 8 + i] = (int16_t) c - (int16_t) r;                          dct[j * 8 + i] = (int16_t) c - (int16_t) r;
211                  }                  }
212          }          }
# Line 146  Line 222 
222   *    SRC (16bit) = SRC   *    SRC (16bit) = SRC
223   *    DST (8bit)  = max(min(DST+SRC, 255), 0)   *    DST (8bit)  = max(min(DST+SRC, 255), 0)
224   */   */
225    void
226    transfer_16to8add_c(uint8_t * const dst,
227                                            const int16_t * const src,
228                                            uint32_t stride)
229    {
230            uint32_t i, j;
231    
232            for (j = 0; j < 8; j++) {
233                    for (i = 0; i < 8; i++) {
234                          int16_t pixel = (int16_t) dst[j * stride + i] + src[j * 8 + i];                          int16_t pixel = (int16_t) dst[j * stride + i] + src[j * 8 + i];
235    
236                          if (pixel < 0) {                          if (pixel < 0) {
# Line 167  Line 252 
252   *    SRC (8bit) = SRC   *    SRC (8bit) = SRC
253   *    DST (8bit) = SRC   *    DST (8bit) = SRC
254   */   */
255    void
256    transfer8x8_copy_c(uint8_t * const dst,
257                                       const uint8_t * const src,
258                                       const uint32_t stride)
259    {
260            uint32_t j;
261    
262            for (j = 0; j < 8; j++) {
263                    uint32_t *d= (uint32_t*)(dst + j*stride);
264                          dst[j * stride + i] = src[j * stride + i];                  const uint32_t *s = (const uint32_t*)(src + j*stride);
265                  }                  *(d+0) = *(s+0);
266                    *(d+1) = *(s+1);
267          }          }
268  }  }
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