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/****************************************************************************** |
/***************************************************************************** |
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* * |
* |
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* This file is part of XviD, a free MPEG-4 video encoder/decoder * |
* XVID MPEG-4 VIDEO CODEC |
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* * |
* - MacroBlock transfer and quantization - |
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* XviD is an implementation of a part of one or more MPEG-4 Video tools * |
* |
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* as specified in ISO/IEC 14496-2 standard. Those intending to use this * |
* Copyright(C) 2002-2001 Michael Militzer <isibaar@xvid.org> |
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* software module in hardware or software products are advised that its * |
* 2002-2001 Peter Ross <pross@xvid.org> |
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* use may infringe existing patents or copyrights, and any such use * |
* |
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* would be at such party's own risk. The original developer of this * |
* This program is an implementation of a part of one or more MPEG-4 |
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* software module and his/her company, and subsequent editors and their * |
* Video tools as specified in ISO/IEC 14496-2 standard. Those intending |
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* companies, will have no liability for use of this software or * |
* to use this software module in hardware or software products are |
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* modifications or derivatives thereof. * |
* advised that its use may infringe existing patents or copyrights, and |
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* * |
* any such use would be at such party's own risk. The original |
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* XviD is free software; you can redistribute it and/or modify it * |
* developer of this software module and his/her company, and subsequent |
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* under the terms of the GNU General Public License as published by * |
* editors and their companies, will have no liability for use of this |
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* the Free Software Foundation; either version 2 of the License, or * |
* software or modifications or derivatives thereof. |
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* (at your option) any later version. * |
* |
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* * |
* This program is free software; you can redistribute it and/or modify |
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* XviD is distributed in the hope that it will be useful, but * |
* it under the terms of the GNU General Public License as published by |
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* WITHOUT ANY WARRANTY; without even the implied warranty of * |
* the Free Software Foundation; either version 2 of the License, or |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
* (at your option) any later version. |
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* GNU General Public License for more details. * |
* |
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* * |
* This program is distributed in the hope that it will be useful, |
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* You should have received a copy of the GNU General Public License * |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* along with this program; if not, write to the Free Software * |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * |
* 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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* mbtransquant.c * |
* $Id$ |
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* * |
* |
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* Copyright (C) 2001 - Peter Ross <pross@cs.rmit.edu.au> * |
****************************************************************************/ |
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* Copyright (C) 2001 - Michael Militzer <isibaar@xvid.org> * |
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* * |
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* For more information visit the XviD homepage: http://www.xvid.org * |
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* * |
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******************************************************************************/ |
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/****************************************************************************** |
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* * |
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* Revision history: * |
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* * |
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* 29.03.2002 interlacing speedup - used transfer strides instead of * |
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* manual field-to-frame conversion * |
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* 26.03.2002 interlacing support - moved transfers outside loops * |
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* 22.12.2001 get_dc_scaler() moved to common.h * |
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* 19.11.2001 introduced coefficient thresholding (Isibaar) * |
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* 17.11.2001 initial version * |
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* * |
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******************************************************************************/ |
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#include <string.h> |
#include <string.h> |
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#include "../quant/quant_h263.h" |
#include "../quant/quant_h263.h" |
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#include "../encoder.h" |
#include "../encoder.h" |
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MBFIELDTEST_PTR MBFieldTest; |
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#define MIN(X, Y) ((X)<(Y)?(X):(Y)) |
#define MIN(X, Y) ((X)<(Y)?(X):(Y)) |
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#define MAX(X, Y) ((X)>(Y)?(X):(Y)) |
#define MAX(X, Y) ((X)>(Y)?(X):(Y)) |
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#define TOOSMALL_LIMIT 1 /* skip blocks having a coefficient sum below this value */ |
#define TOOSMALL_LIMIT 3 /* skip blocks having a coefficient sum below this value */ |
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/* this isnt pretty, but its better than 20 ifdefs */ |
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void |
void |
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MBTransQuantIntra(const MBParam * pParam, |
MBTransQuantIntra(const MBParam * pParam, |
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stop_interlacing_timer(); |
stop_interlacing_timer(); |
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for (i = 0; i < 6; i++) { |
for (i = 0; i < 6; i++) { |
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uint32_t increase_limit = (iQuant == 1) ? 1 : 0; |
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/* |
/* |
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* no need to transfer 8->16-bit |
* no need to transfer 8->16-bit |
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* (this is performed already in motion compensation) |
* (this is performed already in motion compensation) |
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stop_quant_timer(); |
stop_quant_timer(); |
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} |
} |
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if ((sum >= TOOSMALL_LIMIT + increase_limit) || (qcoeff[i*64] != 0) || |
if ((sum >= TOOSMALL_LIMIT) || (qcoeff[i*64] != 0) || |
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(qcoeff[i*64+1] != 0) || (qcoeff[i*64+8] != 0)) { |
(qcoeff[i*64+1] != 0) || (qcoeff[i*64+8] != 0)) { |
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if (pParam->m_quant_type == H263_QUANT) { |
if (pParam->m_quant_type == H263_QUANT) { |
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/* permute block and return field dct choice */ |
/* if sum(diff between field lines) < sum(diff between frame lines), use field dct */ |
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uint32_t |
uint32_t |
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MBDecideFieldDCT(int16_t data[6 * 64]) |
MBDecideFieldDCT(int16_t data[6 * 64]) |
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{ |
{ |
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uint32_t field = MBFieldTest(data); |
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if (field) { |
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MBFrameToField(data); |
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} |
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return field; |
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} |
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/* if sum(diff between field lines) < sum(diff between frame lines), use field dct */ |
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uint32_t |
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MBFieldTest_c(int16_t data[6 * 64]) |
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{ |
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const uint8_t blocks[] = |
const uint8_t blocks[] = |
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{ 0 * 64, 0 * 64, 0 * 64, 0 * 64, 2 * 64, 2 * 64, 2 * 64, 2 * 64 }; |
{ 0 * 64, 0 * 64, 0 * 64, 0 * 64, 2 * 64, 2 * 64, 2 * 64, 2 * 64 }; |
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const uint8_t lines[] = { 0, 16, 32, 48, 0, 16, 32, 48 }; |
const uint8_t lines[] = { 0, 16, 32, 48, 0, 16, 32, 48 }; |
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} |
} |
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} |
} |
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return (frame >= (field + 350)); |
if (frame > field) { |
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MBFrameToField(data); |
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} |
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return (frame > field); |
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} |
} |
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