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* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
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* - Rate Controler module - |
* - Rate Controler module - |
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* |
* |
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* Copyright(C) 2002 Michael Militzer |
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* |
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* This program is an implementation of a part of one or more MPEG-4 |
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* Video tools as specified in ISO/IEC 14496-2 standard. Those intending |
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* to use this software module in hardware or software products are |
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* 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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* developer of this software module and his/her company, and subsequent |
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* editors and their companies, will have no liability for use of this |
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* software or modifications or derivatives thereof. |
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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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****************************************************************************/ |
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/***************************************************************************** |
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* |
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* History |
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* |
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* - Mon Jun 17 13:04:15 2002 Added legal header |
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* |
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* $Id$ |
* $Id$ |
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* |
* |
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****************************************************************************/ |
****************************************************************************/ |
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/* For the fabs function */ |
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#include <math.h> |
#include <math.h> |
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#include "ratecontrol.h" |
#include "ratecontrol.h" |
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/***************************************************************************** |
/***************************************************************************** |
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double quality_scale, base_quality, target_quality; |
double quality_scale, base_quality, target_quality; |
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int32_t rtn_quant; |
int32_t rtn_quant; |
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if(keyframe > 2) |
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return; |
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rate_control->frames++; |
rate_control->frames++; |
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rate_control->total_size += frame_size; |
rate_control->total_size += frame_size; |
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rate_control->rtn_quant = quant; |
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deviation = |
deviation = |
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(int64_t) ((double) rate_control->total_size - |
(int64_t) ((double) rate_control->total_size - |
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((double) |
((double) |
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(double) rate_control->framerate) * |
(double) rate_control->framerate) * |
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(double) rate_control->frames)); |
(double) rate_control->frames)); |
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DEBUGCBR((int32_t) (rate_control->frames - 1), rate_control->rtn_quant, |
DPRINTF(DPRINTF_RC, "CBR: frame: %i, quant: %i, deviation: %i\n", |
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(int32_t)(rate_control->frames - 1), |
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rate_control->rtn_quant, |
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(int32_t) deviation); |
(int32_t) deviation); |
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if (rate_control->rtn_quant >= 2) { |
if (rate_control->rtn_quant >= 2) { |
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if (rate_control->sequence_quality < 0.1) |
if (rate_control->sequence_quality < 0.1) |
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rate_control->sequence_quality = 0.1; |
rate_control->sequence_quality = 0.1; |
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if (!keyframe) { |
if (keyframe != 1) { |
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reaction_delay_factor = |
reaction_delay_factor = |
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(double) rate_control->reaction_delay_factor; |
(double) rate_control->reaction_delay_factor; |
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rate_control->avg_framesize -= |
rate_control->avg_framesize -= |
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static int |
static int |
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get_initial_quant(int bpp) |
get_initial_quant(int bpp) |
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{ |
{ |
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return 5; |
return 8; |
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} |
} |