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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 1.10 2004-03-22 22:36:24 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 1.9 2003-02-15 15:22:19 edgomez Exp $ |
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* |
* |
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****************************************************************************/ |
****************************************************************************/ |
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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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} |
} |