3 |
* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
4 |
* - 8bit<->16bit transfer - |
* - 8bit<->16bit transfer - |
5 |
* |
* |
6 |
|
* Copyright(C) 2001-2003 Peter Ross <pross@xvid.org> |
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 |
10 |
* the Free Software Foundation ; either version 2 of the License, or |
* the Free Software Foundation ; either version 2 of the License, or |
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
21 |
* |
* |
|
****************************************************************************/ |
|
|
/***************************************************************************** |
|
|
* |
|
|
* History |
|
|
* |
|
|
* - 14.06.2002 Changed legal header with the new FSF address |
|
|
* - 14.04.2002 added transfer_8to16sub2 |
|
|
* - 07.01.2002 merge functions from compensate; rename functions |
|
|
* - 22.12.2001 transfer_8to8add16 limit fix |
|
|
* - 07.11.2001 initial version; (c)2001 peter ross <pross@cs.rmit.edu.au> |
|
|
* |
|
22 |
* $Id$ |
* $Id$ |
23 |
* |
* |
24 |
****************************************************************************/ |
****************************************************************************/ |
34 |
TRANSFER_8TO16SUB_PTR transfer_8to16sub; |
TRANSFER_8TO16SUB_PTR transfer_8to16sub; |
35 |
TRANSFER_8TO16SUBRO_PTR transfer_8to16subro; |
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 |
TRANSFER8X8_COPY_PTR transfer8x8_copy; |
TRANSFER8X8_COPY_PTR transfer8x8_copy; |
167 |
* |
* |
168 |
* R1 (8bit) = R1 |
* R1 (8bit) = R1 |
169 |
* R2 (8bit) = R2 |
* R2 (8bit) = R2 |
170 |
* C (8bit) = C |
* R (temp) = min((R1 + R2)/2, 255) |
171 |
* DCT (16bit)= C - min((R1 + R2)/2, 255) |
* DCT (16bit)= C - R |
172 |
|
* C (8bit) = R |
173 |
*/ |
*/ |
174 |
void |
void |
175 |
transfer_8to16sub2_c(int16_t * const dct, |
transfer_8to16sub2_c(int16_t * const dct, |
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 |
} |
} |
257 |
const uint8_t * const src, |
const uint8_t * const src, |
258 |
const uint32_t stride) |
const uint32_t stride) |
259 |
{ |
{ |
260 |
uint32_t i, j; |
uint32_t j; |
261 |
|
|
262 |
for (j = 0; j < 8; j++) { |
for (j = 0; j < 8; j++) { |
263 |
for (i = 0; i < 8; i++) { |
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 |
} |
} |