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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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* * |
* - Macro Block coding functions - |
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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 Michael Militzer <isibaar@xvid.org> |
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* software module in hardware or software products are advised that its * |
* |
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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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* mbcoding.c * |
* $Id$ |
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* * |
* |
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* Copyright (C) 2002 - 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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* 14.04.2002 bframe encoding * |
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* 08.03.2002 initial version; isibaar * |
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* * |
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******************************************************************************/ |
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#include <stdlib.h> |
#include <stdlib.h> |
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#include "../portab.h" |
#include "../portab.h" |
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#define ABS(X) (((X)>0)?(X):-(X)) |
#define ABS(X) (((X)>0)?(X):-(X)) |
46 |
#define CLIP(X,A) (X > A) ? (A) : (X) |
#define CLIP(X,A) (X > A) ? (A) : (X) |
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VLC intra_table[524032]; |
/***************************************************************************** |
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VLC inter_table[524032]; |
* Local data |
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****************************************************************************/ |
51 |
VLC DCT3Dintra[4096]; |
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52 |
VLC DCT3Dinter[4096]; |
static VLC intra_table[524032]; |
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static VLC inter_table[524032]; |
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55 |
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static VLC DCT3Dintra[4096]; |
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static VLC DCT3Dinter[4096]; |
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/***************************************************************************** |
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* Vector Length Coding Initialization |
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****************************************************************************/ |
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void init_vlc_tables(void) |
void |
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init_vlc_tables(void) |
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{ |
{ |
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int32_t k, l, i, intra, last; |
int32_t k, l, i, intra, last; |
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VLC *vlc[2]; |
VLC *vlc[2]; |
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VLC **coeff_ptr; |
VLC const **coeff_ptr; |
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VLC *vlc1, *vlc2; |
VLC *vlc1, *vlc2; |
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vlc1 = DCT3Dintra; |
vlc1 = DCT3Dintra; |
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vlc[0] = intra_table; |
vlc[0] = intra_table; |
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vlc[1] = inter_table; |
vlc[1] = inter_table; |
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|
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// generate encoding vlc lookup tables |
/* |
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// the lookup table idea is taken from the excellent fame project by Vivien Chapellier |
* Generate encoding vlc lookup tables |
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* the lookup table idea is taken from the excellent fame project |
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* by Vivien Chapellier |
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*/ |
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for(i = 0; i < 4; i++) { |
for(i = 0; i < 4; i++) { |
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intra = i % 2; |
intra = i % 2; |
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last = i / 2; |
last = i / 2; |
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coeff_ptr = coeff_vlc[last + 2 * intra]; |
coeff_ptr = coeff_vlc[last + 2 * intra]; |
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for(k = -2047; k < 2048; k++) { // level |
for(k = -2047; k < 2048; k++) { // level |
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int8_t *max_level_ptr = max_level[last + 2 * intra]; |
int8_t const *max_level_ptr = max_level[last + 2 * intra]; |
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int8_t *max_run_ptr = max_run[last + 2 * intra]; |
int8_t const *max_run_ptr = max_run[last + 2 * intra]; |
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for(l = 0; l < 64; l++) { // run |
for(l = 0; l < 64; l++) { // run |
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int32_t level = k; |
int32_t level = k; |
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uint32_t run = l; |
ptr_t run = l; |
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if((abs(level) <= max_level_ptr[run]) && |
if ((abs(level) <= max_level_ptr[run]) && (run <= (uint32_t) max_run_ptr[abs(level)])) { // level < max_level and run < max_run |
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(run <= (uint32_t)max_run_ptr[abs(level)])) { // level < max_level and run < max_run |
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vlc[intra]->code = 0; |
vlc[intra]->code = 0; |
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vlc[intra]->len = 0; |
vlc[intra]->len = 0; |
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goto loop_end; |
goto loop_end; |
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} |
} else { |
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else { |
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if(level > 0) // correct level |
if(level > 0) // correct level |
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level -= max_level_ptr[run]; |
level -= max_level_ptr[run]; |
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else |
else |
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run += max_run_ptr[abs(level)] + 1; |
run += max_run_ptr[abs(level)] + 1; |
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} |
} |
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vlc[intra]->code = (uint32_t) ((l << 14) | (0x1e + last) << 20) | |
vlc[intra]->code = |
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(1 << 13) | ((k & 0xfff) << 1) | 1; |
(uint32_t) ((l << 14) | (0x1e + last) << 20) | (1 << 13) | |
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((k & 0xfff) << 1) | 1; |
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vlc[intra]->len = 30; |
vlc[intra]->len = 30; |
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vlc[intra]++; |
vlc[intra]++; |
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loop_end: |
loop_end: |
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if(level != 0) { |
if(level != 0) { |
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vlc[intra]->code = (vlc[intra]->code << (coeff_ptr[run][abs(level) - 1].len + 1)) | |
vlc[intra]->code = |
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(coeff_ptr[run][abs(level) - 1].code << 1); |
(vlc[intra]-> |
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vlc[intra]->len = (coeff_ptr[run][abs(level) - 1].len + 1) + vlc[intra]->len; |
code << (coeff_ptr[run][abs(level) - 1].len + |
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1)) | (coeff_ptr[run][abs(level) - |
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1].code << 1); |
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vlc[intra]->len = |
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(coeff_ptr[run][abs(level) - 1].len + 1) + |
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vlc[intra]->len; |
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if(level < 0) |
if(level < 0) |
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vlc[intra]->code += 1; |
vlc[intra]->code += 1; |
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if(i >= 512) { |
if(i >= 512) { |
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*vlc1 = DCT3Dtab3[(i >> 5) - 16]; |
*vlc1 = DCT3Dtab3[(i >> 5) - 16]; |
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*vlc2 = DCT3Dtab0[(i >> 5) - 16]; |
*vlc2 = DCT3Dtab0[(i >> 5) - 16]; |
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} |
} else if (i >= 128) { |
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else if(i >= 128) { |
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*vlc1 = DCT3Dtab4[(i >> 2) - 32]; |
*vlc1 = DCT3Dtab4[(i >> 2) - 32]; |
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*vlc2 = DCT3Dtab1[(i >> 2) - 32]; |
*vlc2 = DCT3Dtab1[(i >> 2) - 32]; |
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} |
} else if (i >= 8) { |
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else if(i >= 8) { |
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*vlc1 = DCT3Dtab5[i - 8]; |
*vlc1 = DCT3Dtab5[i - 8]; |
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*vlc2 = DCT3Dtab2[i - 8]; |
*vlc2 = DCT3Dtab2[i - 8]; |
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} |
} else { |
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else { |
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*vlc1 = ERRtab[i]; |
*vlc1 = ERRtab[i]; |
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*vlc2 = ERRtab[i]; |
*vlc2 = ERRtab[i]; |
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} |
} |
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} |
} |
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static __inline void CodeVector(Bitstream *bs, |
/***************************************************************************** |
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* Local inlined functions for MB coding |
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****************************************************************************/ |
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static __inline void |
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CodeVector(Bitstream * bs, |
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int32_t value, |
int32_t value, |
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int32_t f_code, |
int32_t f_code, |
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Statistics *pStat) |
Statistics *pStat) |
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pStat->iMvCount++; |
pStat->iMvCount++; |
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if (value == 0) { |
if (value == 0) { |
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BitstreamPutBits(bs, mb_motion_table[32].code, mb_motion_table[32].len); |
BitstreamPutBits(bs, mb_motion_table[32].code, |
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mb_motion_table[32].len); |
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} else { |
} else { |
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uint16_t length, code, mv_res, sign; |
uint16_t length, code, mv_res, sign; |
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code = -code; |
code = -code; |
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code += 32; |
code += 32; |
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BitstreamPutBits(bs, mb_motion_table[code].code, mb_motion_table[code].len); |
BitstreamPutBits(bs, mb_motion_table[code].code, |
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mb_motion_table[code].len); |
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if(f_code) |
if(f_code) |
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BitstreamPutBits(bs, mv_res, f_code); |
BitstreamPutBits(bs, mv_res, f_code); |
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} |
} |
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static __inline void |
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static __inline void CodeCoeff(Bitstream *bs, |
CodeCoeff(Bitstream * bs, |
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const int16_t qcoeff[64], |
const int16_t qcoeff[64], |
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VLC *table, |
VLC *table, |
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const uint16_t *zigzag, |
const uint16_t *zigzag, |
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j = intra; |
j = intra; |
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last = intra; |
last = intra; |
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while(j < 64 && (v = qcoeff[zigzag[j]]) == 0) j++; |
while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
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j++; |
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do { |
do { |
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vlc = table + 64 * 2047 + (v << 6) + j - last; |
vlc = table + 64 * 2047 + (v << 6) + j - last; |
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last = ++j; |
last = ++j; |
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// count zeroes |
// count zeroes |
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while(j < 64 && (v = qcoeff[zigzag[j]]) == 0) j++; |
while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
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j++; |
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// write code |
// write code |
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if(j != 64) { |
if(j != 64) { |
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} |
} |
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/***************************************************************************** |
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* Local functions |
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****************************************************************************/ |
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static void CodeBlockIntra(const FRAMEINFO * frame, |
static void |
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CodeBlockIntra(const FRAMEINFO * frame, |
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const MACROBLOCK *pMB, |
const MACROBLOCK *pMB, |
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int16_t qcoeff[6*64], |
int16_t qcoeff[6*64], |
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Bitstream * bs, |
Bitstream * bs, |
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// write mcbpc |
// write mcbpc |
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if(frame->coding_type == I_VOP) { |
if(frame->coding_type == I_VOP) { |
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mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
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BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, mcbpc_intra_tab[mcbpc].len); |
BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, |
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} |
mcbpc_intra_tab[mcbpc].len); |
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else { |
} else { |
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mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
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BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, mcbpc_inter_tab[mcbpc].len); |
BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
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mcbpc_inter_tab[mcbpc].len); |
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} |
} |
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// ac prediction flag |
// ac prediction flag |
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BitstreamPutBits(bs, pMB->dquant, 2); |
BitstreamPutBits(bs, pMB->dquant, 2); |
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// write interlacing |
// write interlacing |
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if (frame->global_flags & XVID_INTERLACING) |
if (frame->global_flags & XVID_INTERLACING) { |
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{ |
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BitstreamPutBit(bs, pMB->field_dct); |
BitstreamPutBit(bs, pMB->field_dct); |
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} |
} |
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// code block coeffs |
// code block coeffs |
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for(i = 0; i < 6; i++) |
for (i = 0; i < 6; i++) { |
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{ |
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if(i < 4) |
if(i < 4) |
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BitstreamPutBits(bs, |
BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code, |
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dcy_tab[qcoeff[i*64 + 0] + 255].code, |
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dcy_tab[qcoeff[i*64 + 0] + 255].len); |
dcy_tab[qcoeff[i*64 + 0] + 255].len); |
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else |
else |
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BitstreamPutBits(bs, |
BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code, |
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dcc_tab[qcoeff[i*64 + 0] + 255].code, |
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dcc_tab[qcoeff[i*64 + 0] + 255].len); |
dcc_tab[qcoeff[i*64 + 0] + 255].len); |
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if(pMB->cbp & (1 << (5 - i))) |
if (pMB->cbp & (1 << (5 - i))) { |
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{ |
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bits = BitstreamPos(bs); |
bits = BitstreamPos(bs); |
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CodeCoeff(bs, |
CodeCoeff(bs, &qcoeff[i * 64], intra_table, |
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&qcoeff[i*64], |
scan_tables[pMB->acpred_directions[i]], 1); |
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intra_table, |
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scan_tables[pMB->acpred_directions[i]], |
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1); |
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bits = BitstreamPos(bs) - bits; |
bits = BitstreamPos(bs) - bits; |
340 |
pStat->iTextBits += bits; |
pStat->iTextBits += bits; |
344 |
} |
} |
345 |
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static void CodeBlockInter(const FRAMEINFO * frame, |
static void |
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CodeBlockInter(const FRAMEINFO * frame, |
349 |
const MACROBLOCK *pMB, |
const MACROBLOCK *pMB, |
350 |
int16_t qcoeff[6*64], |
int16_t qcoeff[6*64], |
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Bitstream * bs, |
Bitstream * bs, |
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cbpy = 15 - (pMB->cbp >> 2); |
cbpy = 15 - (pMB->cbp >> 2); |
360 |
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// write mcbpc |
// write mcbpc |
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BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, mcbpc_inter_tab[mcbpc].len); |
BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
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mcbpc_inter_tab[mcbpc].len); |
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// write cbpy |
// write cbpy |
366 |
BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
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BitstreamPutBits(bs, pMB->dquant, 2); |
BitstreamPutBits(bs, pMB->dquant, 2); |
371 |
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372 |
// interlacing |
// interlacing |
373 |
if (frame->global_flags & XVID_INTERLACING) |
if (frame->global_flags & XVID_INTERLACING) { |
374 |
{ |
if (pMB->cbp) { |
375 |
BitstreamPutBit(bs, pMB->field_dct); |
BitstreamPutBit(bs, pMB->field_dct); |
376 |
DEBUG1("codep: field_dct: ", pMB->field_dct); |
DEBUG1("codep: field_dct: ", pMB->field_dct); |
377 |
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} |
378 |
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// if inter block, write field ME flag |
// if inter block, write field ME flag |
380 |
if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) |
if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
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{ |
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BitstreamPutBit(bs, pMB->field_pred); |
BitstreamPutBit(bs, pMB->field_pred); |
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DEBUG1("codep: field_pred: ", pMB->field_pred); |
DEBUG1("codep: field_pred: ", pMB->field_pred); |
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// write field prediction references |
// write field prediction references |
385 |
if (pMB->field_pred) |
if (pMB->field_pred) { |
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{ |
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386 |
BitstreamPutBit(bs, pMB->field_for_top); |
BitstreamPutBit(bs, pMB->field_for_top); |
387 |
BitstreamPutBit(bs, pMB->field_for_bot); |
BitstreamPutBit(bs, pMB->field_for_bot); |
388 |
} |
} |
389 |
} |
} |
390 |
} |
} |
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391 |
// code motion vector(s) |
// code motion vector(s) |
392 |
for(i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) |
for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { |
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{ |
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393 |
CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); |
CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); |
394 |
CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); |
CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); |
395 |
} |
} |
406 |
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407 |
} |
} |
408 |
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409 |
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/***************************************************************************** |
410 |
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* Macro Block bitstream encoding functions |
411 |
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****************************************************************************/ |
412 |
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413 |
void MBCoding(const FRAMEINFO * frame, |
void |
414 |
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MBCoding(const FRAMEINFO * frame, |
415 |
MACROBLOCK *pMB, |
MACROBLOCK *pMB, |
416 |
int16_t qcoeff[6*64], |
int16_t qcoeff[6*64], |
417 |
Bitstream * bs, |
Bitstream * bs, |
418 |
Statistics * pStat) |
Statistics * pStat) |
419 |
{ |
{ |
420 |
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int intra = (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q); |
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421 |
if(frame->coding_type == P_VOP) { |
if(frame->coding_type == P_VOP) { |
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if(pMB->cbp == 0 && pMB->mode == MODE_INTER && |
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pMB->mvs[0].x == 0 && pMB->mvs[0].y == 0) |
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{ |
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BitstreamPutBit(bs, 1); // not_coded |
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return; |
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} |
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else |
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422 |
BitstreamPutBit(bs, 0); // coded |
BitstreamPutBit(bs, 0); // coded |
423 |
} |
} |
424 |
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425 |
if(intra) |
if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
426 |
CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
427 |
else |
else |
428 |
CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
429 |
|
|
430 |
} |
} |
431 |
|
|
|
/*************************************************************** |
|
|
* bframe encoding start |
|
|
***************************************************************/ |
|
432 |
|
|
433 |
/* |
void |
434 |
mbtype |
MBSkip(Bitstream * bs) |
|
0 1b direct(h263) mvdb |
|
|
1 01b interpolate mc+q dbquant, mvdf, mvdb |
|
|
2 001b backward mc+q dbquant, mvdb |
|
|
3 0001b forward mc+q dbquant, mvdf |
|
|
*/ |
|
|
|
|
|
void put_bvop_mbtype(Bitstream * bs, int value) |
|
|
{ |
|
|
switch(value) |
|
435 |
{ |
{ |
436 |
case 0 : BitstreamPutBit(bs, 1); |
BitstreamPutBit(bs, 1); // not coded |
437 |
return; |
return; |
|
|
|
|
case 1 : BitstreamPutBit(bs, 0); |
|
|
BitstreamPutBit(bs, 1); |
|
|
return; |
|
|
|
|
|
case 2 : BitstreamPutBit(bs, 0); |
|
|
BitstreamPutBit(bs, 0); |
|
|
BitstreamPutBit(bs, 1); |
|
|
return; |
|
|
|
|
|
case 3 : BitstreamPutBit(bs, 0); |
|
|
BitstreamPutBit(bs, 0); |
|
|
BitstreamPutBit(bs, 0); |
|
|
BitstreamPutBit(bs, 1); |
|
|
return; |
|
|
|
|
|
default : ; // invalid! |
|
|
|
|
438 |
} |
} |
439 |
|
|
440 |
} |
/***************************************************************************** |
441 |
|
* decoding stuff starts here |
442 |
|
****************************************************************************/ |
443 |
|
|
444 |
/* |
/* |
445 |
dbquant |
* For IVOP addbits == 0 |
446 |
-2 10b |
* For PVOP addbits == fcode - 1 |
447 |
0 0b |
* For BVOP addbits == max(fcode,bcode) - 1 |
448 |
+2 11b |
* returns true or false |
449 |
*/ |
*/ |
450 |
|
|
451 |
void put_bvop_dbquant(Bitstream *bs, int value) |
int |
452 |
{ |
check_resync_marker(Bitstream * bs, int addbits) |
|
switch (value) |
|
|
{ |
|
|
case 0 : BitstreamPutBit(bs, 0); |
|
|
return; |
|
|
|
|
|
case -2 : BitstreamPutBit(bs, 1); |
|
|
BitstreamPutBit(bs, 0); |
|
|
return; |
|
|
|
|
|
case 2 : BitstreamPutBit(bs, 1); |
|
|
BitstreamPutBit(bs, 1); |
|
|
return; |
|
|
|
|
|
default : ; // invalid |
|
|
} |
|
|
} |
|
|
|
|
|
|
|
|
|
|
|
void MBCodingBVOP(const MACROBLOCK * mb, |
|
|
const int16_t qcoeff[6*64], |
|
|
const int32_t fcode, |
|
|
const int32_t bcode, |
|
|
Bitstream * bs, |
|
|
Statistics * pStat) |
|
|
{ |
|
|
int i; |
|
|
|
|
|
/* ------------------------------------------------------------------ |
|
|
when a block is skipped it is decoded DIRECT(0,) |
|
|
hence are interpolated from forward & backward frames |
|
|
------------------------------------------------------------------ */ |
|
|
|
|
|
if (mb->mode == 5) |
|
|
{ |
|
|
BitstreamPutBit(bs, 1); // skipped |
|
|
return; |
|
|
} |
|
|
|
|
|
BitstreamPutBit(bs, 0); // not skipped |
|
|
|
|
|
if (mb->cbp == 0) |
|
453 |
{ |
{ |
454 |
BitstreamPutBit(bs, 1); // cbp == 0 |
uint32_t nbits; |
455 |
} |
uint32_t code; |
456 |
else |
uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits; |
|
{ |
|
|
BitstreamPutBit(bs, 0); // cbp == xxx |
|
|
} |
|
|
|
|
|
put_bvop_mbtype(bs, mb->mode); |
|
|
|
|
|
if (mb->cbp) |
|
|
{ |
|
|
BitstreamPutBits(bs, mb->cbp, 6); |
|
|
} |
|
|
|
|
|
if (mb->mode != MODE_DIRECT && mb->cbp != 0) |
|
|
{ |
|
|
put_bvop_dbquant(bs, 0); // todo: mb->dquant = 0 |
|
|
} |
|
457 |
|
|
458 |
if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_FORWARD) |
nbits = BitstreamNumBitsToByteAlign(bs); |
459 |
{ |
code = BitstreamShowBits(bs, nbits); |
|
CodeVector(bs, mb->pmvs[0].x, fcode, pStat); |
|
|
CodeVector(bs, mb->pmvs[0].y, fcode, pStat); |
|
|
} |
|
460 |
|
|
461 |
if (mb->mode == MODE_INTERPOLATE || mb->mode == MODE_BACKWARD) |
if (code == (((uint32_t)1 << (nbits - 1)) - 1)) |
462 |
{ |
{ |
463 |
CodeVector(bs, mb->b_pmvs[0].x, bcode, pStat); |
return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER; |
|
CodeVector(bs, mb->b_pmvs[0].y, bcode, pStat); |
|
464 |
} |
} |
465 |
|
|
466 |
if (mb->mode == MODE_DIRECT) |
return 0; |
|
{ |
|
|
// TODO: direct |
|
|
} |
|
|
|
|
|
for (i = 0; i < 6; i++) |
|
|
{ |
|
|
if (mb->cbp & (1 << (5 - i))) |
|
|
{ |
|
|
CodeCoeff(bs, &qcoeff[i*64], inter_table, scan_tables[0], 0); |
|
|
} |
|
|
} |
|
467 |
} |
} |
468 |
|
|
469 |
|
|
470 |
|
|
471 |
/*************************************************************** |
int |
472 |
* decoding stuff starts here * |
get_mcbpc_intra(Bitstream * bs) |
|
***************************************************************/ |
|
|
|
|
|
int get_mcbpc_intra(Bitstream * bs) |
|
473 |
{ |
{ |
474 |
|
|
475 |
uint32_t index; |
uint32_t index; |
476 |
|
|
477 |
while((index = BitstreamShowBits(bs, 9)) == 1) |
index = BitstreamShowBits(bs, 9); |
|
BitstreamSkip(bs, 9); |
|
|
|
|
478 |
index >>= 3; |
index >>= 3; |
479 |
|
|
480 |
BitstreamSkip(bs, mcbpc_intra_table[index].len); |
BitstreamSkip(bs, mcbpc_intra_table[index].len); |
483 |
|
|
484 |
} |
} |
485 |
|
|
486 |
int get_mcbpc_inter(Bitstream * bs) |
int |
487 |
|
get_mcbpc_inter(Bitstream * bs) |
488 |
{ |
{ |
489 |
|
|
490 |
uint32_t index; |
uint32_t index; |
491 |
|
|
492 |
while((index = CLIP(BitstreamShowBits(bs, 9), 256)) == 1) |
index = CLIP(BitstreamShowBits(bs, 9), 256); |
|
BitstreamSkip(bs, 9); |
|
493 |
|
|
494 |
BitstreamSkip(bs, mcbpc_inter_table[index].len); |
BitstreamSkip(bs, mcbpc_inter_table[index].len); |
495 |
|
|
497 |
|
|
498 |
} |
} |
499 |
|
|
500 |
int get_cbpy(Bitstream * bs, int intra) |
int |
501 |
|
get_cbpy(Bitstream * bs, |
502 |
|
int intra) |
503 |
{ |
{ |
504 |
|
|
505 |
int cbpy; |
int cbpy; |
515 |
|
|
516 |
} |
} |
517 |
|
|
518 |
int get_mv_data(Bitstream * bs) |
int |
519 |
|
get_mv_data(Bitstream * bs) |
520 |
{ |
{ |
521 |
|
|
522 |
uint32_t index; |
uint32_t index; |
526 |
|
|
527 |
index = BitstreamShowBits(bs, 12); |
index = BitstreamShowBits(bs, 12); |
528 |
|
|
529 |
if(index >= 512) |
if (index >= 512) { |
|
{ |
|
530 |
index = (index >> 8) - 2; |
index = (index >> 8) - 2; |
531 |
BitstreamSkip(bs, TMNMVtab0[index].len); |
BitstreamSkip(bs, TMNMVtab0[index].len); |
532 |
return TMNMVtab0[index].code; |
return TMNMVtab0[index].code; |
533 |
} |
} |
534 |
|
|
535 |
if(index >= 128) |
if (index >= 128) { |
|
{ |
|
536 |
index = (index >> 2) - 32; |
index = (index >> 2) - 32; |
537 |
BitstreamSkip(bs, TMNMVtab1[index].len); |
BitstreamSkip(bs, TMNMVtab1[index].len); |
538 |
return TMNMVtab1[index].code; |
return TMNMVtab1[index].code; |
545 |
|
|
546 |
} |
} |
547 |
|
|
548 |
int get_mv(Bitstream * bs, int fcode) |
int |
549 |
|
get_mv(Bitstream * bs, |
550 |
|
int fcode) |
551 |
{ |
{ |
552 |
|
|
553 |
int data; |
int data; |
567 |
|
|
568 |
} |
} |
569 |
|
|
570 |
int get_dc_dif(Bitstream * bs, uint32_t dc_size) |
int |
571 |
|
get_dc_dif(Bitstream * bs, |
572 |
|
uint32_t dc_size) |
573 |
{ |
{ |
574 |
|
|
575 |
int code = BitstreamGetBits(bs, dc_size); |
int code = BitstreamGetBits(bs, dc_size); |
582 |
|
|
583 |
} |
} |
584 |
|
|
585 |
int get_dc_size_lum(Bitstream * bs) |
int |
586 |
|
get_dc_size_lum(Bitstream * bs) |
587 |
{ |
{ |
588 |
|
|
589 |
int code, i; |
int code, i; |
590 |
|
|
591 |
code = BitstreamShowBits(bs, 11); |
code = BitstreamShowBits(bs, 11); |
592 |
|
|
593 |
for(i = 11; i > 3; i--) { |
for(i = 11; i > 3; i--) { |
604 |
} |
} |
605 |
|
|
606 |
|
|
607 |
int get_dc_size_chrom(Bitstream * bs) |
int |
608 |
|
get_dc_size_chrom(Bitstream * bs) |
609 |
{ |
{ |
610 |
|
|
611 |
uint32_t code, i; |
uint32_t code, i; |
612 |
|
|
613 |
code = BitstreamShowBits(bs, 12); |
code = BitstreamShowBits(bs, 12); |
614 |
|
|
615 |
for(i = 12; i > 2; i--) { |
for(i = 12; i > 2; i--) { |
624 |
|
|
625 |
} |
} |
626 |
|
|
627 |
void get_intra_block(Bitstream * bs, int16_t * block, int direction, int coeff) |
/***************************************************************************** |
628 |
|
* Local inlined function to "decode" written vlc codes |
629 |
|
****************************************************************************/ |
630 |
|
|
631 |
|
static __inline int |
632 |
|
get_coeff(Bitstream * bs, |
633 |
|
int *run, |
634 |
|
int *last, |
635 |
|
int intra, |
636 |
|
int short_video_header) |
637 |
|
{ |
638 |
|
|
639 |
|
uint32_t mode; |
640 |
|
const VLC *tab; |
641 |
|
int32_t level; |
642 |
|
|
643 |
|
if (short_video_header) // inter-VLCs will be used for both intra and inter blocks |
644 |
|
intra = 0; |
645 |
|
|
646 |
|
tab = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
647 |
|
|
648 |
|
if (tab->code == -1) |
649 |
|
goto error; |
650 |
|
|
651 |
|
BitstreamSkip(bs, tab->len); |
652 |
|
|
653 |
|
if (tab->code != ESCAPE) { |
654 |
|
if (!intra) { |
655 |
|
*run = (tab->code >> 4) & 255; |
656 |
|
level = tab->code & 15; |
657 |
|
*last = (tab->code >> 12) & 1; |
658 |
|
} else { |
659 |
|
*run = (tab->code >> 8) & 255; |
660 |
|
level = tab->code & 255; |
661 |
|
*last = (tab->code >> 16) & 1; |
662 |
|
} |
663 |
|
return BitstreamGetBit(bs) ? -level : level; |
664 |
|
} |
665 |
|
|
666 |
|
if (short_video_header) { |
667 |
|
// escape mode 4 - H.263 type, only used if short_video_header = 1 |
668 |
|
*last = BitstreamGetBit(bs); |
669 |
|
*run = BitstreamGetBits(bs, 6); |
670 |
|
level = BitstreamGetBits(bs, 8); |
671 |
|
|
672 |
|
if (level == 0 || level == 128) |
673 |
|
DEBUG1("Illegal LEVEL for ESCAPE mode 4:", level); |
674 |
|
|
675 |
|
return (level >= 128 ? -(256 - level) : level); |
676 |
|
} |
677 |
|
|
678 |
|
mode = BitstreamShowBits(bs, 2); |
679 |
|
|
680 |
|
if (mode < 3) { |
681 |
|
BitstreamSkip(bs, (mode == 2) ? 2 : 1); |
682 |
|
|
683 |
|
tab = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
684 |
|
if (tab->code == -1) |
685 |
|
goto error; |
686 |
|
|
687 |
|
BitstreamSkip(bs, tab->len); |
688 |
|
|
689 |
|
if (!intra) { |
690 |
|
*run = (tab->code >> 4) & 255; |
691 |
|
level = tab->code & 15; |
692 |
|
*last = (tab->code >> 12) & 1; |
693 |
|
} else { |
694 |
|
*run = (tab->code >> 8) & 255; |
695 |
|
level = tab->code & 255; |
696 |
|
*last = (tab->code >> 16) & 1; |
697 |
|
} |
698 |
|
|
699 |
|
if (mode < 2) // first escape mode, level is offset |
700 |
|
level += max_level[*last + (!intra << 1)][*run]; // need to add back the max level |
701 |
|
else if (mode == 2) // second escape mode, run is offset |
702 |
|
*run += max_run[*last + (!intra << 1)][level] + 1; |
703 |
|
|
704 |
|
return BitstreamGetBit(bs) ? -level : level; |
705 |
|
} |
706 |
|
// third escape mode - fixed length codes |
707 |
|
BitstreamSkip(bs, 2); |
708 |
|
*last = BitstreamGetBits(bs, 1); |
709 |
|
*run = BitstreamGetBits(bs, 6); |
710 |
|
BitstreamSkip(bs, 1); // marker |
711 |
|
level = BitstreamGetBits(bs, 12); |
712 |
|
BitstreamSkip(bs, 1); // marker |
713 |
|
|
714 |
|
return (level & 0x800) ? (level | (-1 ^ 0xfff)) : level; |
715 |
|
|
716 |
|
error: |
717 |
|
*run = VLC_ERROR; |
718 |
|
return 0; |
719 |
|
|
720 |
|
} |
721 |
|
|
722 |
|
/***************************************************************************** |
723 |
|
* MB reading functions |
724 |
|
****************************************************************************/ |
725 |
|
|
726 |
|
void |
727 |
|
get_intra_block(Bitstream * bs, |
728 |
|
int16_t * block, |
729 |
|
int direction, |
730 |
|
int coeff) |
731 |
{ |
{ |
732 |
|
|
733 |
const uint16_t * scan = scan_tables[ direction ]; |
const uint16_t * scan = scan_tables[ direction ]; |
735 |
int run; |
int run; |
736 |
int last; |
int last; |
737 |
|
|
738 |
do |
do { |
|
{ |
|
739 |
level = get_coeff(bs, &run, &last, 1, 0); |
level = get_coeff(bs, &run, &last, 1, 0); |
740 |
if (run == -1) |
if (run == -1) { |
|
{ |
|
741 |
DEBUG("fatal: invalid run"); |
DEBUG("fatal: invalid run"); |
742 |
break; |
break; |
743 |
} |
} |
744 |
coeff += run; |
coeff += run; |
745 |
block[ scan[coeff] ] = level; |
block[ scan[coeff] ] = level; |
746 |
if (level < -127 || level > 127) |
|
747 |
{ |
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); |
748 |
|
//DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); |
749 |
|
|
750 |
|
if (level < -127 || level > 127) { |
751 |
DEBUG1("warning: intra_overflow", level); |
DEBUG1("warning: intra_overflow", level); |
752 |
} |
} |
753 |
coeff++; |
coeff++; |
755 |
|
|
756 |
} |
} |
757 |
|
|
758 |
void get_inter_block(Bitstream * bs, int16_t * block) |
void |
759 |
|
get_inter_block(Bitstream * bs, |
760 |
|
int16_t * block) |
761 |
{ |
{ |
762 |
|
|
763 |
const uint16_t * scan = scan_tables[0]; |
const uint16_t * scan = scan_tables[0]; |
767 |
int last; |
int last; |
768 |
|
|
769 |
p = 0; |
p = 0; |
770 |
do |
do { |
|
{ |
|
771 |
level = get_coeff(bs, &run, &last, 0, 0); |
level = get_coeff(bs, &run, &last, 0, 0); |
772 |
if (run == -1) |
if (run == -1) { |
|
{ |
|
773 |
DEBUG("fatal: invalid run"); |
DEBUG("fatal: invalid run"); |
774 |
break; |
break; |
775 |
} |
} |
776 |
p += run; |
p += run; |
777 |
|
|
778 |
block[ scan[p] ] = level; |
block[ scan[p] ] = level; |
779 |
if (level < -127 || level > 127) |
|
780 |
{ |
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); |
781 |
|
// DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[p], level, BitstreamShowBits(bs, 32)); |
782 |
|
|
783 |
|
if (level < -127 || level > 127) { |
784 |
DEBUG1("warning: inter_overflow", level); |
DEBUG1("warning: inter_overflow", level); |
785 |
} |
} |
786 |
p++; |
p++; |