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* XVID MPEG-4 VIDEO CODEC |
* XVID MPEG-4 VIDEO CODEC |
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* - Bitstream reader/writer functions - |
* - Bitstream reader/writer functions - |
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* |
* |
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* Copyright (C) 2001-2002 - Peter Ross <pross@cs.rmit.edu.au> |
* Copyright (C) 2001-2002 - Peter Ross <pross@xvid.org> |
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* |
* |
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* This program is an implementation of a part of one or more MPEG-4 |
* This file is part of XviD, a free MPEG-4 video encoder/decoder |
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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 |
* XviD is free software; you can redistribute it and/or modify it |
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* it under the terms of the GNU General Public License as published by |
* 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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* (at your option) any later version. |
* (at your option) any later version. |
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* |
* |
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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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* Under section 8 of the GNU General Public License, the copyright |
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* holders of XVID explicitly forbid distribution in the following |
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* countries: |
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* |
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* - Japan |
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* - United States of America |
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* |
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* Linking XviD statically or dynamically with other modules is making a |
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* combined work based on XviD. Thus, the terms and conditions of the |
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* GNU General Public License cover the whole combination. |
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* |
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* As a special exception, the copyright holders of XviD give you |
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* permission to link XviD with independent modules that communicate with |
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* XviD solely through the VFW1.1 and DShow interfaces, regardless of the |
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* license terms of these independent modules, and to copy and distribute |
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* the resulting combined work under terms of your choice, provided that |
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* every copy of the combined work is accompanied by a complete copy of |
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* the source code of XviD (the version of XviD used to produce the |
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* combined work), being distributed under the terms of the GNU General |
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* Public License plus this exception. An independent module is a module |
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* which is not derived from or based on XviD. |
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* |
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* Note that people who make modified versions of XviD are not obligated |
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* to grant this special exception for their modified versions; it is |
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* their choice whether to do so. The GNU General Public License gives |
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* permission to release a modified version without this exception; this |
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* exception also makes it possible to release a modified version which |
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* carries forward this exception. |
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* |
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* $Id$ |
* $Id$ |
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* |
* |
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****************************************************************************/ |
****************************************************************************/ |
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log2bin(uint32_t value) |
log2bin(uint32_t value) |
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{ |
{ |
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/* Changed by Chenm001 */ |
/* Changed by Chenm001 */ |
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#ifndef WIN32 |
#if !defined(_MSC_VER) |
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int n = 0; |
int n = 0; |
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while (value) { |
while (value) { |
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if (vol_ver_id != 1) { |
if (vol_ver_id != 1) { |
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DEBUG("QUARTERPEL BITSTREAM"); |
DPRINTF(DPRINTF_DEBUG, "QUARTERPEL BITSTREAM"); |
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dec->quarterpel = BitstreamGetBit(bs); // quarter_sample |
dec->quarterpel = BitstreamGetBit(bs); // quarter_sample |
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} |
} |
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else |
else |
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BitstreamPutBit(bs, 1); // vol_control_parameters |
BitstreamPutBit(bs, 1); // vol_control_parameters |
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BitstreamPutBits(bs, 1, 2); // chroma_format 1="4:2:0" |
BitstreamPutBits(bs, 1, 2); // chroma_format 1="4:2:0" |
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#ifdef BFRAMES |
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if (pParam->max_bframes > 0) { |
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BitstreamPutBit(bs, 0); // low_delay |
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} else |
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#endif |
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{ |
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BitstreamPutBit(bs, 1); // low_delay |
BitstreamPutBit(bs, 1); // low_delay |
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} |
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BitstreamPutBit(bs, 0); // vbv_parameters (0=not given) |
BitstreamPutBit(bs, 0); // vbv_parameters (0=not given) |
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BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular) |
BitstreamPutBits(bs, 0, 2); // video_object_layer_shape (0=rectangular) |
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WRITE_MARKER(); |
WRITE_MARKER(); |
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/* time_increment_resolution; ignored by current decore versions |
/* |
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eg. 2fps res=2 inc=1 |
* time_increment_resolution; ignored by current decore versions |
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25fps res=25 inc=1 |
* eg. 2fps res=2 inc=1 |
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29.97fps res=30000 inc=1001 |
* 25fps res=25 inc=1 |
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* 29.97fps res=30000 inc=1001 |
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*/ |
*/ |
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#ifdef BFRAMES |
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BitstreamPutBits(bs, pParam->fbase, 16); |
BitstreamPutBits(bs, pParam->fbase, 16); |
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#else |
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BitstreamPutBits(bs, pParam->fbase, 16); |
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#endif |
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WRITE_MARKER(); |
WRITE_MARKER(); |
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#ifdef BFRAMES |
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BitstreamPutBit(bs, 1); // fixed_vop_rate = 1 |
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BitstreamPutBits(bs, pParam->fincr, log2bin(pParam->fbase)); // fixed_vop_time_increment |
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#else |
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BitstreamPutBit(bs, 1); // fixed_vop_rate = 1 |
BitstreamPutBit(bs, 1); // fixed_vop_rate = 1 |
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BitstreamPutBits(bs, pParam->fincr, log2bin(pParam->fbase)); // fixed_vop_time_increment |
BitstreamPutBits(bs, pParam->fincr, log2bin(pParam->fbase)); // fixed_vop_time_increment |
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#endif |
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WRITE_MARKER(); |
WRITE_MARKER(); |
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BitstreamPutBits(bs, pParam->width, 13); // width |
BitstreamPutBits(bs, pParam->width, 13); // width |
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BitstreamPutBits(bs, frame->coding_type, 2); |
BitstreamPutBits(bs, frame->coding_type, 2); |
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// time_base = 0 write n x PutBit(1), PutBit(0) |
// time_base = 0 write n x PutBit(1), PutBit(0) |
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#ifdef BFRAMES |
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for (i = 0; i < frame->seconds; i++) { |
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BitstreamPutBit(bs, 1); |
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} |
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BitstreamPutBit(bs, 0); |
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#else |
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for (i = 0; i < frame->seconds; i++) { |
for (i = 0; i < frame->seconds; i++) { |
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BitstreamPutBit(bs, 1); |
BitstreamPutBit(bs, 1); |
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} |
} |
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BitstreamPutBit(bs, 0); |
BitstreamPutBit(bs, 0); |
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// BitstreamPutBits(bs, 0, 1); |
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#endif |
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WRITE_MARKER(); |
WRITE_MARKER(); |
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// time_increment: value=nth_of_sec, nbits = log2(resolution) |
// time_increment: value=nth_of_sec, nbits = log2(resolution) |
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#ifdef BFRAMES |
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BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase)); |
BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase)); |
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/*DPRINTF("[%i:%i] %c\n", frame->seconds, frame->ticks, |
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frame->coding_type == I_VOP ? 'I' : frame->coding_type == |
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P_VOP ? 'P' : 'B');*/ |
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#else |
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BitstreamPutBits(bs, frame->ticks, log2bin(pParam->fbase)); |
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// BitstreamPutBits(bs, 1, 1); |
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#endif |
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WRITE_MARKER(); |
WRITE_MARKER(); |
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