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/***************************************************************************** |
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* |
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* XVID MPEG-4 VIDEO CODEC |
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* - CBP related function - |
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* |
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* Copyright(C) 2002-2003 Edouard Gomez <ed.gomez@free.fr> |
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* 2003 Christoph Lampert <gruel@web.de> |
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* |
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* 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 |
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* the Free Software Foundation ; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY ; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* 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 |
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* |
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* $Id: cbp.c,v 1.13 2004-03-22 22:36:23 edgomez Exp $ |
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* |
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****************************************************************************/ |
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#include "../portab.h" |
#include "../portab.h" |
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#include "cbp.h" |
#include "cbp.h" |
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uint32_t |
uint32_t |
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calc_cbp_c(const int16_t codes[6 * 64]) |
calc_cbp_c(const int16_t codes[6 * 64]) |
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{ |
{ |
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int i, j; |
unsigned int i=6; |
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uint32_t cbp = 0; |
uint32_t cbp = 0; |
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/* if definition is changed (e.g. from int16_t to something like int) this routine |
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is not possible anymore! */ |
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for (i = 5; i >= 0; i--, codes += 64) { |
/* uses fixed relation: 4*codes = 1*codes64 */ |
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/* if prototype is changed (e.g. from int16_t to something like int32) this routine |
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has to be changed! */ |
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do { |
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uint64_t *codes64 = (uint64_t*)codes; /* the compiler doesn't really make this */ |
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uint32_t *codes32 = (uint32_t*)codes; /* variables, just "addressing modes" */ |
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uint64_t *codes64 = (uint64_t*)codes; |
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cbp += cbp; |
cbp += cbp; |
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if (codes[1] || codes[2] || codes[3]) { |
if (codes[1] || codes32[1]) { |
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cbp++; |
cbp++; |
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continue; |
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} |
} |
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if (codes64[1] | codes64[2] | codes64[3]) { |
else if (codes64[1] | codes64[2] | codes64[3]) { |
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cbp++; |
cbp++; |
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continue; |
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} |
} |
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if (codes64[4] | codes64[5] | codes64[6] | codes64[7]) { |
else if (codes64[4] | codes64[5] | codes64[6] | codes64[7]) { |
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cbp++; |
cbp++; |
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continue; |
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} |
} |
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if (codes64[8] | codes64[9] | codes64[10] | codes64[11]) { |
else if (codes64[8] | codes64[9] | codes64[10] | codes64[11]) { |
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cbp++; |
cbp++; |
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continue; |
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} |
} |
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if (codes64[12] | codes64[13] | codes64[14] | codes64[15]) { |
else if (codes64[12] | codes64[13] | codes64[14] | codes64[15]) { |
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cbp++; |
cbp++; |
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continue; |
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} |
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} |
} |
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codes += 64; |
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i--; |
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} while (i != 0); |
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return cbp; |
return cbp; |
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} |
} |
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/* older code maybe better on some plattforms? */ |
/* older code maybe better on some plattforms? */ |
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#if (0==1) |
#if 0 |
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for (i = 5; i >= 0; i--) { |
for (i = 5; i >= 0; i--) { |
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if (codes[1] | codes[2] | codes[3]) |
if (codes[1] | codes[2] | codes[3]) |
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cbp |= 1 << i; |
cbp |= 1 << i; |