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* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
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* - 8bit<->16bit transfer - |
* - 8bit<->16bit transfer - |
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* |
* |
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* Copyright(C) 2001-2003 Peter Ross <pross@xvid.org> |
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* |
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* This program is free software ; you can redistribute it and/or modify |
* This program is free software ; you can redistribute it and/or modify |
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* 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 |
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* the Free Software Foundation ; either version 2 of the License, or |
* the Free Software Foundation ; either version 2 of the License, or |
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* along with this program ; if not, write to the Free Software |
* along with this program ; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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* |
* |
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****************************************************************************/ |
* $Id: mem_transfer.c,v 1.11 2004-07-14 23:26:06 edgomez Exp $ |
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/***************************************************************************** |
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* |
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* History |
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* |
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* - 14.06.2002 Changed legal header with the new FSF address |
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* - 14.04.2002 added transfer_8to16sub2 |
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* - 07.01.2002 merge functions from compensate; rename functions |
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* - 22.12.2001 transfer_8to8add16 limit fix |
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* - 07.11.2001 initial version; (c)2001 peter ross <pross@cs.rmit.edu.au> |
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* |
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* $Id: mem_transfer.c,v 1.4 2002-06-15 22:15:57 edgomez Exp $ |
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* |
* |
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****************************************************************************/ |
****************************************************************************/ |
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TRANSFER_16TO8COPY_PTR transfer_16to8copy; |
TRANSFER_16TO8COPY_PTR transfer_16to8copy; |
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TRANSFER_8TO16SUB_PTR transfer_8to16sub; |
TRANSFER_8TO16SUB_PTR transfer_8to16sub; |
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TRANSFER_8TO16SUBRO_PTR transfer_8to16subro; |
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TRANSFER_8TO16SUB2_PTR transfer_8to16sub2; |
TRANSFER_8TO16SUB2_PTR transfer_8to16sub2; |
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TRANSFER_16TO8ADD_PTR transfer_16to8add; |
TRANSFER_16TO8ADD_PTR transfer_16to8add; |
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} |
} |
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void |
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transfer_8to16subro_c(int16_t * const dct, |
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const uint8_t * const cur, |
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const uint8_t * ref, |
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const uint32_t stride) |
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{ |
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uint32_t i, j; |
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for (j = 0; j < 8; j++) { |
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for (i = 0; i < 8; i++) { |
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uint8_t c = cur[j * stride + i]; |
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uint8_t r = ref[j * stride + i]; |
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dct[j * 8 + i] = (int16_t) c - (int16_t) r; |
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} |
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} |
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} |
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/* |
/* |
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* C - the current buffer |
* C - the current buffer |
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* R1 - the 1st reference buffer |
* R1 - the 1st reference buffer |
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* |
* |
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* R1 (8bit) = R1 |
* R1 (8bit) = R1 |
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* R2 (8bit) = R2 |
* R2 (8bit) = R2 |
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* C (8bit) = C |
* R (temp) = min((R1 + R2)/2, 255) |
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* DCT (16bit)= C - min((R1 + R2)/2, 255) |
* DCT (16bit)= C - R |
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* C (8bit) = R |
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*/ |
*/ |
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void |
void |
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transfer_8to16sub2_c(int16_t * const dct, |
transfer_8to16sub2_c(int16_t * const dct, |
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if (r > 255) { |
if (r > 255) { |
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r = 255; |
r = 255; |
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} |
} |
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//cur[j * stride + i] = r; |
cur[j * stride + i] = r; |
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dct[j * 8 + i] = (int16_t) c - (int16_t) r; |
dct[j * 8 + i] = (int16_t) c - (int16_t) r; |
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} |
} |
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} |
} |
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const uint8_t * const src, |
const uint8_t * const src, |
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const uint32_t stride) |
const uint32_t stride) |
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{ |
{ |
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uint32_t i, j; |
uint32_t j; |
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for (j = 0; j < 8; j++) { |
for (j = 0; j < 8; j++) { |
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for (i = 0; i < 8; i++) { |
uint32_t *d= (uint32_t*)(dst + j*stride); |
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dst[j * stride + i] = src[j * stride + i]; |
const uint32_t *s = (const uint32_t*)(src + j*stride); |
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} |
*(d+0) = *(s+0); |
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*(d+1) = *(s+1); |
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} |
} |
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} |
} |