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/***************************************************************************** |
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* |
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* XVID MPEG-4 VIDEO CODEC |
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* - Macro Block coding functions - |
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* |
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* Copyright(C) 2002 Michael Militzer <isibaar@xvid.org> |
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* |
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* This file is part of XviD, a free MPEG-4 video encoder/decoder |
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* |
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* XviD is free software; you can redistribute it and/or modify it |
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* 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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* 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: mbcoding.c,v 1.37 2003-01-05 16:54:36 edgomez Exp $ |
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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" |
59 |
#include "bitstream.h" |
#include "bitstream.h" |
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64 |
#include "../utils/mbfunctions.h" |
#include "../utils/mbfunctions.h" |
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#define ESCAPE 7167 |
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#define ABS(X) (((X)>0)?(X):-(X)) |
#define ABS(X) (((X)>0)?(X):-(X)) |
67 |
#define CLIP(X,A) (X > A) ? (A) : (X) |
#define CLIP(X,A) (X > A) ? (A) : (X) |
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69 |
VLC DCT3Dintra[4096]; |
/*#define _BIGLUT_*/ |
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VLC DCT3Dinter[4096]; |
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static VLC *DCT3D[2]; |
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VLC intra_table[65536]; |
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VLC inter_table[65536]; |
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static short clip_table[4096]; |
#ifdef _BIGLUT_ |
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#define LEVELOFFSET 2048 |
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#else |
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#define LEVELOFFSET 32 |
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#endif |
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/***************************************************************************** |
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* Local data |
79 |
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****************************************************************************/ |
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static REVERSE_EVENT DCT3D[2][4096]; |
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#ifdef _BIGLUT_ |
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static VLC coeff_VLC[2][2][4096][64]; |
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VLC *intra_table, *inter_table; |
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#else |
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static VLC coeff_VLC[2][2][64][64]; |
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#endif |
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/***************************************************************************** |
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* Vector Length Coding Initialization |
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****************************************************************************/ |
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|
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void init_vlc_tables(void) |
void |
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init_vlc_tables(void) |
96 |
{ |
{ |
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uint32_t i, j, intra, last, run, offset; |
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int32_t level; |
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VLC coeff_VLC_temp[2][2][64][64]; |
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int32_t k, l, i, intra, last; |
#ifdef _BIGLUT_ |
102 |
VLC *vlc[2]; |
intra_table = coeff_VLC[1]; |
103 |
VLC **coeff_ptr; |
inter_table = coeff_VLC[0]; |
104 |
VLC *vlc1, *vlc2; |
#endif |
105 |
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vlc1 = DCT3Dintra; |
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vlc2 = DCT3Dinter; |
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106 |
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107 |
vlc[0] = intra_table; |
for (intra = 0; intra < 2; intra++) |
108 |
vlc[1] = inter_table; |
for (i = 0; i < 4096; i++) |
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DCT3D[intra][i].event.level = 0; |
110 |
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|
111 |
// initialize the clipping table |
for (intra = 0; intra < 2; intra++) |
112 |
for(i = -2048; i < 2048; i++) { |
for (last = 0; last < 2; last++) |
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clip_table[i + 2048] = i; |
{ |
114 |
if(i < -255) |
for (run = 0; run < 63 + last; run++) |
115 |
clip_table[i + 2048] = -255; |
for (level = 0; level < 32 << intra; level++) |
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if(i > 255) |
{ |
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clip_table[i + 2048] = 255; |
#ifdef _BIGLUT_ |
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offset = LEVELOFFSET; |
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#else |
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offset = !intra * LEVELOFFSET; |
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#endif |
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coeff_VLC_temp[intra][last][level][run].len = 128; |
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coeff_VLC[intra][last][level + offset][run].len = 128; |
124 |
} |
} |
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// generate encoding vlc lookup tables |
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for(i = 0; i < 4; i++) { |
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intra = i % 2; |
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last = i / 2; |
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coeff_ptr = coeff_vlc[last + 2 * intra]; |
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for(k = -255; k < 256; k++) { // level |
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int8_t *max_level_ptr = max_level[last + 2 * intra]; |
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int8_t *max_run_ptr = max_run[last + 2 * intra]; |
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for(l = 0; l < 64; l++) { // run |
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int32_t level = k; |
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uint32_t run = l; |
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if((abs(level) <= max_level_ptr[run]) && |
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(run <= max_run_ptr[abs(level)])) { // level < max_level and run < max_run |
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vlc[intra]->code = 0; |
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vlc[intra]->len = 0; |
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goto loop_end; |
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125 |
} |
} |
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else { |
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if(level > 0) // correct level |
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level -= max_level_ptr[run]; |
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else |
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level += max_level_ptr[run]; |
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if((abs(level) <= max_level_ptr[run]) && |
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(run <= max_run_ptr[abs(level)])) { |
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126 |
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127 |
vlc[intra]->code = 0x06; |
for (intra = 0; intra < 2; intra++) |
128 |
vlc[intra]->len = 8; |
for (i = 0; i < 102; i++) |
129 |
goto loop_end; |
{ |
130 |
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#ifdef _BIGLUT_ |
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offset = LEVELOFFSET; |
132 |
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#else |
133 |
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offset = !intra * LEVELOFFSET; |
134 |
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#endif |
135 |
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for (j = 0; j < 1 << (12 - coeff_tab[intra][i].vlc.len); j++) |
136 |
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{ |
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DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].len = coeff_tab[intra][i].vlc.len; |
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DCT3D[intra][(coeff_tab[intra][i].vlc.code << (12 - coeff_tab[intra][i].vlc.len)) | j].event = coeff_tab[intra][i].event; |
139 |
} |
} |
140 |
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if(level > 0) // still here? |
coeff_VLC_temp[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].code |
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level += max_level_ptr[run]; // restore level |
= coeff_tab[intra][i].vlc.code << 1; |
143 |
else |
coeff_VLC_temp[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].len |
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level -= max_level_ptr[run]; |
= coeff_tab[intra][i].vlc.len + 1; |
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run -= max_run_ptr[abs(level)] + 1; // and change run |
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if((abs(level) <= max_level_ptr[run]) && |
coeff_VLC[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level + offset][coeff_tab[intra][i].event.run].code |
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(run <= max_run_ptr[abs(level)])) { |
= coeff_tab[intra][i].vlc.code << 1; |
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coeff_VLC[intra][coeff_tab[intra][i].event.last][coeff_tab[intra][i].event.level + offset][coeff_tab[intra][i].event.run].len |
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vlc[intra]->code = 0x0e; |
= coeff_tab[intra][i].vlc.len + 1; |
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vlc[intra]->len = 9; |
#ifndef _BIGLUT_ |
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goto loop_end; |
if (!intra) |
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#endif |
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{ |
154 |
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coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].code |
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= (coeff_tab[intra][i].vlc.code << 1) | 1; |
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coeff_VLC[intra][coeff_tab[intra][i].event.last][offset - coeff_tab[intra][i].event.level][coeff_tab[intra][i].event.run].len |
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= coeff_tab[intra][i].vlc.len + 1; |
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} |
} |
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run += max_run_ptr[abs(level)] + 1; |
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} |
} |
160 |
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vlc[intra]->code = (uint32_t) ((l << 14) | (0x1e + last) << 20) | |
for (intra = 0; intra < 2; intra++) |
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(1 << 13) | ((k & 0xfff) << 1) | 1; |
for (last = 0; last < 2; last++) |
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for (run = 0; run < 63 + last; run++) |
164 |
vlc[intra]->len = 30; |
{ |
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vlc[intra]++; |
for (level = 1; level < 32 << intra; level++) |
166 |
continue; |
{ |
167 |
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#ifdef _BIGLUT_ |
168 |
loop_end: |
offset = LEVELOFFSET; |
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if(level != 0) { |
#else |
170 |
vlc[intra]->code = (vlc[intra]->code << (coeff_ptr[run][abs(level) - 1].len + 1)) | |
offset = !intra * LEVELOFFSET; |
171 |
(coeff_ptr[run][abs(level) - 1].code << 1); |
#endif |
172 |
vlc[intra]->len = (coeff_ptr[run][abs(level) - 1].len + 1) + vlc[intra]->len; |
if ((max_level[intra][last][run]) && (level > max_level[intra][last][run])) |
173 |
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if (coeff_VLC_temp[intra][last][level - max_level[intra][last][run]][run].len != 128 |
174 |
if(level < 0) |
&& coeff_VLC[intra][last][level + offset][run].len == 128) |
175 |
vlc[intra]->code += 1; |
{ |
176 |
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coeff_VLC[intra][last][level + offset][run].code |
177 |
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= (ESCAPE1 << coeff_VLC_temp[intra][last][level - max_level[intra][last][run]][run].len) |
178 |
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| coeff_VLC_temp[intra][last][level - max_level[intra][last][run]][run].code; |
179 |
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coeff_VLC[intra][last][level + offset][run].len |
180 |
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= coeff_VLC_temp[intra][last][level - max_level[intra][last][run]][run].len + 7 + 1; |
181 |
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#ifndef _BIGLUT_ |
182 |
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if (!intra) |
183 |
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#endif |
184 |
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{ |
185 |
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coeff_VLC[intra][last][offset - level][run].code |
186 |
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= (ESCAPE1 << coeff_VLC_temp[intra][last][level - max_level[intra][last][run]][run].len) |
187 |
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| coeff_VLC_temp[intra][last][level - max_level[intra][last][run]][run].code | 1; |
188 |
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coeff_VLC[intra][last][offset - level][run].len |
189 |
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= coeff_VLC_temp[intra][last][level - max_level[intra][last][run]][run].len + 7 + 1; |
190 |
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} |
191 |
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} |
192 |
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if (run > max_run[intra][last][level]) |
193 |
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if (coeff_VLC_temp[intra][last][level][run - 1 - max_run[intra][last][level]].len != 128 |
194 |
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&& coeff_VLC[intra][last][level + offset][run].len == 128) |
195 |
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/*use the lower test instead of the upper to use shorter escape codes when possible : |
196 |
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if (coeff_VLC_temp[intra][last][level][run - 1 - max_run[intra][last][level]].len + 7 + 2 |
197 |
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< coeff_VLC[intra][last][level + offset][run].len)*/ |
198 |
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{ |
199 |
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coeff_VLC[intra][last][level + offset][run].code |
200 |
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= (ESCAPE2 << coeff_VLC_temp[intra][last][level][run - 1 - max_run[intra][last][level]].len) |
201 |
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| coeff_VLC_temp[intra][last][level][run - 1 - max_run[intra][last][level]].code; |
202 |
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coeff_VLC[intra][last][level + offset][run].len |
203 |
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= coeff_VLC_temp[intra][last][level][run - 1 - max_run[intra][last][level]].len + 7 + 2; |
204 |
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#ifndef _BIGLUT_ |
205 |
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if (!intra) |
206 |
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#endif |
207 |
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{ |
208 |
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coeff_VLC[intra][last][offset - level][run].code |
209 |
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= (ESCAPE2 << coeff_VLC_temp[intra][last][level][run - 1 - max_run[intra][last][level]].len) |
210 |
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| coeff_VLC_temp[intra][last][level][run - 1 - max_run[intra][last][level]].code | 1; |
211 |
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coeff_VLC[intra][last][offset - level][run].len |
212 |
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= coeff_VLC_temp[intra][last][level][run - 1 - max_run[intra][last][level]].len + 7 + 2; |
213 |
} |
} |
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vlc[intra]++; |
|
214 |
} |
} |
215 |
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#ifndef _BIGLUT_ |
216 |
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if (!intra) |
217 |
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#endif |
218 |
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if (coeff_VLC[intra][last][level + offset][run].len == 128) |
219 |
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{ |
220 |
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coeff_VLC[intra][last][level + offset][run].code |
221 |
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= (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((level & 0xfff) << 1) | 1; |
222 |
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coeff_VLC[intra][last][level + offset][run].len = 30; |
223 |
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|
224 |
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coeff_VLC[intra][last][offset - level][run].code |
225 |
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= (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-level & 0xfff) << 1) | 1; |
226 |
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coeff_VLC[intra][last][offset - level][run].len = 30; |
227 |
} |
} |
228 |
} |
} |
229 |
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#ifdef _BIGLUT_ |
230 |
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for (level = 32 << intra; level < 2048; level++) |
231 |
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{ |
232 |
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coeff_VLC[intra][last][level + offset][run].code |
233 |
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= (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((level & 0xfff) << 1) | 1; |
234 |
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coeff_VLC[intra][last][level + offset][run].len = 30; |
235 |
|
|
236 |
for(i = 0; i < 4096; i++) { |
coeff_VLC[intra][last][offset - level][run].code |
237 |
if(i >= 512) { |
= (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-level & 0xfff) << 1) | 1; |
238 |
*vlc1 = DCT3Dtab3[(i >> 5) - 16]; |
coeff_VLC[intra][last][offset - level][run].len = 30; |
|
*vlc2 = DCT3Dtab0[(i >> 5) - 16]; |
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} |
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else if(i >= 128) { |
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*vlc1 = DCT3Dtab4[(i >> 2) - 32]; |
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*vlc2 = DCT3Dtab1[(i >> 2) - 32]; |
|
239 |
} |
} |
240 |
else if(i >= 8) { |
#else |
241 |
*vlc1 = DCT3Dtab5[i - 8]; |
if (!intra) |
242 |
*vlc2 = DCT3Dtab2[i - 8]; |
{ |
243 |
|
coeff_VLC[intra][last][0][run].code |
244 |
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= (ESCAPE3 << 21) | (last << 20) | (run << 14) | (1 << 13) | ((-32 & 0xfff) << 1) | 1; |
245 |
|
coeff_VLC[intra][last][0][run].len = 30; |
246 |
} |
} |
247 |
else { |
#endif |
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*vlc1 = ERRtab[i]; |
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*vlc2 = ERRtab[i]; |
|
248 |
} |
} |
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vlc1++; |
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vlc2++; |
|
249 |
} |
} |
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DCT3D[0] = DCT3Dinter; |
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DCT3D[1] = DCT3Dintra; |
|
250 |
|
|
251 |
} |
/***************************************************************************** |
252 |
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* Local inlined functions for MB coding |
253 |
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****************************************************************************/ |
254 |
|
|
255 |
static __inline void CodeVector(Bitstream *bs, |
static __inline void |
256 |
int16_t value, |
CodeVector(Bitstream * bs, |
257 |
int16_t f_code, |
int32_t value, |
258 |
|
int32_t f_code, |
259 |
Statistics *pStat) |
Statistics *pStat) |
260 |
{ |
{ |
261 |
|
|
272 |
pStat->iMvCount++; |
pStat->iMvCount++; |
273 |
|
|
274 |
if (value == 0) { |
if (value == 0) { |
275 |
BitstreamPutBits(bs, mb_motion_table[32].code, mb_motion_table[32].len); |
BitstreamPutBits(bs, mb_motion_table[32].code, |
276 |
|
mb_motion_table[32].len); |
277 |
} else { |
} else { |
278 |
uint16_t length, code, mv_res, sign; |
uint16_t length, code, mv_res, sign; |
279 |
|
|
298 |
code = -code; |
code = -code; |
299 |
|
|
300 |
code += 32; |
code += 32; |
301 |
BitstreamPutBits(bs, mb_motion_table[code].code, mb_motion_table[code].len); |
BitstreamPutBits(bs, mb_motion_table[code].code, |
302 |
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mb_motion_table[code].len); |
303 |
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|
304 |
if(f_code) |
if(f_code) |
305 |
BitstreamPutBits(bs, mv_res, f_code); |
BitstreamPutBits(bs, mv_res, f_code); |
307 |
|
|
308 |
} |
} |
309 |
|
|
310 |
|
#ifdef __BIGLUT_ |
311 |
|
|
312 |
static __inline void CodeCoeff(Bitstream *bs, |
static __inline void |
313 |
int16_t qcoeff[64], |
CodeCoeff(Bitstream * bs, |
314 |
|
const int16_t qcoeff[64], |
315 |
VLC *table, |
VLC *table, |
316 |
const uint16_t *zigzag, |
const uint16_t *zigzag, |
317 |
uint16_t intra) |
uint16_t intra) |
322 |
VLC *vlc; |
VLC *vlc; |
323 |
|
|
324 |
j = intra; |
j = intra; |
325 |
last = 1 + intra; |
last = intra; |
326 |
|
|
327 |
while((v = qcoeff[zigzag[j++]]) == 0); |
while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
328 |
|
j++; |
329 |
|
|
330 |
do { |
do { |
331 |
// count zeroes |
vlc = table + 64 * 2048 + (v << 6) + j - last; |
332 |
vlc = table + 64*255 + (clip_table[2048+v] << 6) + j - last; |
last = ++j; |
|
last = j + 1; |
|
|
while(j < 64 && (v = qcoeff[zigzag[j++]]) == 0); |
|
333 |
|
|
334 |
// write code |
/* count zeroes */ |
335 |
|
while (j < 64 && (v = qcoeff[zigzag[j]]) == 0) |
336 |
|
j++; |
337 |
|
|
338 |
|
/* write code */ |
339 |
if(j != 64) { |
if(j != 64) { |
340 |
BitstreamPutBits(bs, vlc->code, vlc->len); |
BitstreamPutBits(bs, vlc->code, vlc->len); |
341 |
} else { |
} else { |
342 |
vlc += 64*511; |
vlc += 64 * 4096; |
343 |
BitstreamPutBits(bs, vlc->code, vlc->len); |
BitstreamPutBits(bs, vlc->code, vlc->len); |
344 |
break; |
break; |
345 |
} |
} |
347 |
|
|
348 |
} |
} |
349 |
|
|
350 |
|
#else |
351 |
|
|
352 |
|
static __inline void |
353 |
|
CodeCoeffInter(Bitstream * bs, |
354 |
|
const int16_t qcoeff[64], |
355 |
|
const uint16_t * zigzag) |
356 |
|
{ |
357 |
|
uint32_t i, run, prev_run, code, len; |
358 |
|
int32_t level, prev_level, level_shifted; |
359 |
|
|
360 |
|
i = 0; |
361 |
|
run = 0; |
362 |
|
|
363 |
|
while (!(level = qcoeff[zigzag[i++]])) |
364 |
|
run++; |
365 |
|
|
366 |
|
prev_level = level; |
367 |
|
prev_run = run; |
368 |
|
run = 0; |
369 |
|
|
370 |
|
while (i < 64) |
371 |
|
{ |
372 |
|
if ((level = qcoeff[zigzag[i++]]) != 0) |
373 |
|
{ |
374 |
|
level_shifted = prev_level + 32; |
375 |
|
if (!(level_shifted & -64)) |
376 |
|
{ |
377 |
|
code = coeff_VLC[0][0][level_shifted][prev_run].code; |
378 |
|
len = coeff_VLC[0][0][level_shifted][prev_run].len; |
379 |
|
} |
380 |
|
else |
381 |
|
{ |
382 |
|
code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1; |
383 |
|
len = 30; |
384 |
|
} |
385 |
|
BitstreamPutBits(bs, code, len); |
386 |
|
prev_level = level; |
387 |
|
prev_run = run; |
388 |
|
run = 0; |
389 |
|
} |
390 |
|
else |
391 |
|
run++; |
392 |
|
} |
393 |
|
|
394 |
|
level_shifted = prev_level + 32; |
395 |
|
if (!(level_shifted & -64)) |
396 |
|
{ |
397 |
|
code = coeff_VLC[0][1][level_shifted][prev_run].code; |
398 |
|
len = coeff_VLC[0][1][level_shifted][prev_run].len; |
399 |
|
} |
400 |
|
else |
401 |
|
{ |
402 |
|
code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1; |
403 |
|
len = 30; |
404 |
|
} |
405 |
|
BitstreamPutBits(bs, code, len); |
406 |
|
} |
407 |
|
|
408 |
|
static __inline void |
409 |
|
CodeCoeffIntra(Bitstream * bs, |
410 |
|
const int16_t qcoeff[64], |
411 |
|
const uint16_t * zigzag) |
412 |
|
{ |
413 |
|
uint32_t i, abs_level, run, prev_run, code, len; |
414 |
|
int32_t level, prev_level; |
415 |
|
|
416 |
|
i = 1; |
417 |
|
run = 0; |
418 |
|
|
419 |
static void CodeBlockIntra(const MBParam * pParam, |
while (!(level = qcoeff[zigzag[i++]])) |
420 |
|
run++; |
421 |
|
|
422 |
|
prev_level = level; |
423 |
|
prev_run = run; |
424 |
|
run = 0; |
425 |
|
|
426 |
|
while (i < 64) |
427 |
|
{ |
428 |
|
if ((level = qcoeff[zigzag[i++]]) != 0) |
429 |
|
{ |
430 |
|
abs_level = ABS(prev_level); |
431 |
|
abs_level = abs_level < 64 ? abs_level : 0; |
432 |
|
code = coeff_VLC[1][0][abs_level][prev_run].code; |
433 |
|
len = coeff_VLC[1][0][abs_level][prev_run].len; |
434 |
|
if (len != 128) |
435 |
|
code |= (prev_level < 0); |
436 |
|
else |
437 |
|
{ |
438 |
|
code = (ESCAPE3 << 21) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1; |
439 |
|
len = 30; |
440 |
|
} |
441 |
|
BitstreamPutBits(bs, code, len); |
442 |
|
prev_level = level; |
443 |
|
prev_run = run; |
444 |
|
run = 0; |
445 |
|
} |
446 |
|
else |
447 |
|
run++; |
448 |
|
} |
449 |
|
|
450 |
|
abs_level = ABS(prev_level); |
451 |
|
abs_level = abs_level < 64 ? abs_level : 0; |
452 |
|
code = coeff_VLC[1][1][abs_level][prev_run].code; |
453 |
|
len = coeff_VLC[1][1][abs_level][prev_run].len; |
454 |
|
if (len != 128) |
455 |
|
code |= (prev_level < 0); |
456 |
|
else |
457 |
|
{ |
458 |
|
code = (ESCAPE3 << 21) | (1 << 20) | (prev_run << 14) | (1 << 13) | ((prev_level & 0xfff) << 1) | 1; |
459 |
|
len = 30; |
460 |
|
} |
461 |
|
BitstreamPutBits(bs, code, len); |
462 |
|
} |
463 |
|
|
464 |
|
#endif |
465 |
|
|
466 |
|
/***************************************************************************** |
467 |
|
* Local functions |
468 |
|
****************************************************************************/ |
469 |
|
|
470 |
|
static void |
471 |
|
CodeBlockIntra(const FRAMEINFO * frame, |
472 |
const MACROBLOCK *pMB, |
const MACROBLOCK *pMB, |
473 |
int16_t qcoeff[6*64], |
int16_t qcoeff[6*64], |
474 |
Bitstream * bs, |
Bitstream * bs, |
479 |
|
|
480 |
cbpy = pMB->cbp >> 2; |
cbpy = pMB->cbp >> 2; |
481 |
|
|
482 |
// write mcbpc |
/* write mcbpc */ |
483 |
if(pParam->coding_type == I_VOP) { |
if (frame->coding_type == I_VOP) { |
484 |
mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
mcbpc = ((pMB->mode >> 1) & 3) | ((pMB->cbp & 3) << 2); |
485 |
BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, mcbpc_intra_tab[mcbpc].len); |
BitstreamPutBits(bs, mcbpc_intra_tab[mcbpc].code, |
486 |
} |
mcbpc_intra_tab[mcbpc].len); |
487 |
else { |
} else { |
488 |
mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
489 |
BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, mcbpc_inter_tab[mcbpc].len); |
BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
490 |
|
mcbpc_inter_tab[mcbpc].len); |
491 |
} |
} |
492 |
|
|
493 |
// ac prediction flag |
/* ac prediction flag */ |
494 |
if(pMB->acpred_directions[0]) |
if(pMB->acpred_directions[0]) |
495 |
BitstreamPutBits(bs, 1, 1); |
BitstreamPutBits(bs, 1, 1); |
496 |
else |
else |
497 |
BitstreamPutBits(bs, 0, 1); |
BitstreamPutBits(bs, 0, 1); |
498 |
|
|
499 |
// write cbpy |
/* write cbpy */ |
500 |
BitstreamPutBits (bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
BitstreamPutBits (bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
501 |
|
|
502 |
// write dquant |
/* write dquant */ |
503 |
if(pMB->mode == MODE_INTRA_Q) |
if(pMB->mode == MODE_INTRA_Q) |
504 |
BitstreamPutBits(bs, pMB->dquant, 2); |
BitstreamPutBits(bs, pMB->dquant, 2); |
505 |
|
|
506 |
// write interlacing |
/* write interlacing */ |
507 |
if (pParam->global_flags & XVID_INTERLACING) |
if (frame->global_flags & XVID_INTERLACING) { |
|
{ |
|
508 |
BitstreamPutBit(bs, pMB->field_dct); |
BitstreamPutBit(bs, pMB->field_dct); |
509 |
} |
} |
510 |
|
/* code block coeffs */ |
511 |
// code block coeffs |
for (i = 0; i < 6; i++) { |
|
for(i = 0; i < 6; i++) |
|
|
{ |
|
512 |
if(i < 4) |
if(i < 4) |
513 |
BitstreamPutBits(bs, |
BitstreamPutBits(bs, dcy_tab[qcoeff[i * 64 + 0] + 255].code, |
|
dcy_tab[qcoeff[i*64 + 0] + 255].code, |
|
514 |
dcy_tab[qcoeff[i*64 + 0] + 255].len); |
dcy_tab[qcoeff[i*64 + 0] + 255].len); |
515 |
else |
else |
516 |
BitstreamPutBits(bs, |
BitstreamPutBits(bs, dcc_tab[qcoeff[i * 64 + 0] + 255].code, |
|
dcc_tab[qcoeff[i*64 + 0] + 255].code, |
|
517 |
dcc_tab[qcoeff[i*64 + 0] + 255].len); |
dcc_tab[qcoeff[i*64 + 0] + 255].len); |
518 |
|
|
519 |
if(pMB->cbp & (1 << (5 - i))) |
if (pMB->cbp & (1 << (5 - i))) { |
|
{ |
|
520 |
bits = BitstreamPos(bs); |
bits = BitstreamPos(bs); |
521 |
|
|
522 |
CodeCoeff(bs, |
#ifdef _BIGLUT_ |
523 |
&qcoeff[i*64], |
CodeCoeff(bs, &qcoeff[i * 64], intra_table, |
524 |
intra_table, |
scan_tables[pMB->acpred_directions[i]], 1); |
525 |
scan_tables[pMB->acpred_directions[i]], |
#else |
526 |
1); |
CodeCoeffIntra(bs, &qcoeff[i * 64], scan_tables[pMB->acpred_directions[i]]); |
527 |
|
#endif |
528 |
bits = BitstreamPos(bs) - bits; |
bits = BitstreamPos(bs) - bits; |
529 |
pStat->iTextBits += bits; |
pStat->iTextBits += bits; |
530 |
} |
} |
533 |
} |
} |
534 |
|
|
535 |
|
|
536 |
static void CodeBlockInter(const MBParam * pParam, |
static void |
537 |
|
CodeBlockInter(const FRAMEINFO * frame, |
538 |
const MACROBLOCK *pMB, |
const MACROBLOCK *pMB, |
539 |
int16_t qcoeff[6*64], |
int16_t qcoeff[6*64], |
540 |
Bitstream * bs, |
Bitstream * bs, |
547 |
mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
mcbpc = (pMB->mode & 7) | ((pMB->cbp & 3) << 3); |
548 |
cbpy = 15 - (pMB->cbp >> 2); |
cbpy = 15 - (pMB->cbp >> 2); |
549 |
|
|
550 |
// write mcbpc |
/* write mcbpc */ |
551 |
BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, mcbpc_inter_tab[mcbpc].len); |
BitstreamPutBits(bs, mcbpc_inter_tab[mcbpc].code, |
552 |
|
mcbpc_inter_tab[mcbpc].len); |
553 |
|
|
554 |
// write cbpy |
/* write cbpy */ |
555 |
BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
BitstreamPutBits(bs, cbpy_tab[cbpy].code, cbpy_tab[cbpy].len); |
556 |
|
|
557 |
// write dquant |
/* write dquant */ |
558 |
if(pMB->mode == MODE_INTER_Q) |
if(pMB->mode == MODE_INTER_Q) |
559 |
BitstreamPutBits(bs, pMB->dquant, 2); |
BitstreamPutBits(bs, pMB->dquant, 2); |
560 |
|
|
561 |
// interlacing |
/* interlacing */ |
562 |
if (pParam->global_flags & XVID_INTERLACING) |
if (frame->global_flags & XVID_INTERLACING) { |
563 |
{ |
if (pMB->cbp) { |
564 |
BitstreamPutBit(bs, pMB->field_dct); |
BitstreamPutBit(bs, pMB->field_dct); |
565 |
DEBUG1("codep: field_dct: ", pMB->field_dct); |
DPRINTF(DPRINTF_DEBUG, "codep: field_dct: %d", pMB->field_dct); |
566 |
|
} |
567 |
|
|
568 |
// if inter block, write field ME flag |
/* if inter block, write field ME flag */ |
569 |
if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) |
if (pMB->mode == MODE_INTER || pMB->mode == MODE_INTER_Q) { |
|
{ |
|
570 |
BitstreamPutBit(bs, pMB->field_pred); |
BitstreamPutBit(bs, pMB->field_pred); |
571 |
DEBUG1("codep: field_pred: ", pMB->field_pred); |
DPRINTF(DPRINTF_DEBUG, "codep: field_pred: %d", pMB->field_pred); |
572 |
|
|
573 |
// write field prediction references |
/* write field prediction references */ |
574 |
if (pMB->field_pred) |
if (pMB->field_pred) { |
|
{ |
|
575 |
BitstreamPutBit(bs, pMB->field_for_top); |
BitstreamPutBit(bs, pMB->field_for_top); |
576 |
BitstreamPutBit(bs, pMB->field_for_bot); |
BitstreamPutBit(bs, pMB->field_for_bot); |
577 |
} |
} |
578 |
} |
} |
579 |
} |
} |
580 |
|
/* code motion vector(s) */ |
581 |
// code motion vector(s) |
for (i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) { |
582 |
for(i = 0; i < (pMB->mode == MODE_INTER4V ? 4 : 1); i++) |
CodeVector(bs, pMB->pmvs[i].x, frame->fcode, pStat); |
583 |
{ |
CodeVector(bs, pMB->pmvs[i].y, frame->fcode, pStat); |
|
CodeVector(bs, pMB->pmvs[i].x, pParam->fixed_code, pStat); |
|
|
CodeVector(bs, pMB->pmvs[i].y, pParam->fixed_code, pStat); |
|
584 |
} |
} |
585 |
|
|
586 |
bits = BitstreamPos(bs); |
bits = BitstreamPos(bs); |
587 |
|
|
588 |
// code block coeffs |
/* code block coeffs */ |
589 |
for(i = 0; i < 6; i++) |
for(i = 0; i < 6; i++) |
590 |
if(pMB->cbp & (1 << (5 - i))) |
if(pMB->cbp & (1 << (5 - i))) |
591 |
|
#ifdef _BIGLUT_ |
592 |
CodeCoeff(bs, &qcoeff[i*64], inter_table, scan_tables[0], 0); |
CodeCoeff(bs, &qcoeff[i*64], inter_table, scan_tables[0], 0); |
593 |
|
#else |
594 |
|
CodeCoeffInter(bs, &qcoeff[i * 64], scan_tables[0]); |
595 |
|
#endif |
596 |
|
|
597 |
bits = BitstreamPos(bs) - bits; |
bits = BitstreamPos(bs) - bits; |
598 |
pStat->iTextBits += bits; |
pStat->iTextBits += bits; |
599 |
|
|
600 |
} |
} |
601 |
|
|
602 |
|
/***************************************************************************** |
603 |
|
* Macro Block bitstream encoding functions |
604 |
|
****************************************************************************/ |
605 |
|
|
606 |
void MBCoding(const MBParam * pParam, |
void |
607 |
|
MBCoding(const FRAMEINFO * frame, |
608 |
MACROBLOCK *pMB, |
MACROBLOCK *pMB, |
609 |
int16_t qcoeff[6*64], |
int16_t qcoeff[6*64], |
610 |
Bitstream * bs, |
Bitstream * bs, |
611 |
Statistics * pStat) |
Statistics * pStat) |
612 |
{ |
{ |
613 |
|
|
614 |
int intra = (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q); |
if (frame->coding_type == P_VOP) { |
615 |
|
BitstreamPutBit(bs, 0); /* coded */ |
616 |
|
} |
617 |
|
|
618 |
|
if (pMB->mode == MODE_INTRA || pMB->mode == MODE_INTRA_Q) |
619 |
|
CodeBlockIntra(frame, pMB, qcoeff, bs, pStat); |
620 |
|
else |
621 |
|
CodeBlockInter(frame, pMB, qcoeff, bs, pStat); |
622 |
|
|
623 |
|
} |
624 |
|
|
625 |
|
|
626 |
if(pParam->coding_type == P_VOP) { |
void |
627 |
if(pMB->cbp == 0 && pMB->mode == MODE_INTER && |
MBSkip(Bitstream * bs) |
|
pMB->mvs[0].x == 0 && pMB->mvs[0].y == 0) |
|
628 |
{ |
{ |
629 |
BitstreamPutBit(bs, 1); // not_coded |
BitstreamPutBit(bs, 1); /* not coded */ |
630 |
return; |
return; |
631 |
} |
} |
|
else |
|
|
BitstreamPutBit(bs, 0); // coded |
|
|
} |
|
632 |
|
|
633 |
if(intra) |
/***************************************************************************** |
634 |
CodeBlockIntra(pParam, pMB, qcoeff, bs, pStat); |
* decoding stuff starts here |
635 |
else |
****************************************************************************/ |
636 |
CodeBlockInter(pParam, pMB, qcoeff, bs, pStat); |
|
637 |
|
/* |
638 |
|
* For IVOP addbits == 0 |
639 |
|
* For PVOP addbits == fcode - 1 |
640 |
|
* For BVOP addbits == max(fcode,bcode) - 1 |
641 |
|
* returns true or false |
642 |
|
*/ |
643 |
|
|
644 |
|
int |
645 |
|
check_resync_marker(Bitstream * bs, int addbits) |
646 |
|
{ |
647 |
|
uint32_t nbits; |
648 |
|
uint32_t code; |
649 |
|
uint32_t nbitsresyncmarker = NUMBITS_VP_RESYNC_MARKER + addbits; |
650 |
|
|
651 |
|
nbits = BitstreamNumBitsToByteAlign(bs); |
652 |
|
code = BitstreamShowBits(bs, nbits); |
653 |
|
|
654 |
|
if (code == (((uint32_t)1 << (nbits - 1)) - 1)) |
655 |
|
{ |
656 |
|
return BitstreamShowBitsFromByteAlign(bs, nbitsresyncmarker) == RESYNC_MARKER; |
657 |
|
} |
658 |
|
|
659 |
|
return 0; |
660 |
} |
} |
661 |
|
|
662 |
|
|
|
/*************************************************************** |
|
|
* decoding stuff starts here * |
|
|
***************************************************************/ |
|
663 |
|
|
664 |
int get_mcbpc_intra(Bitstream * bs) |
int |
665 |
|
get_mcbpc_intra(Bitstream * bs) |
666 |
{ |
{ |
667 |
|
|
668 |
uint32_t index; |
uint32_t index; |
669 |
|
|
670 |
while((index = BitstreamShowBits(bs, 9)) == 1) |
index = BitstreamShowBits(bs, 9); |
|
BitstreamSkip(bs, 9); |
|
|
|
|
671 |
index >>= 3; |
index >>= 3; |
672 |
|
|
673 |
BitstreamSkip(bs, mcbpc_intra_table[index].len); |
BitstreamSkip(bs, mcbpc_intra_table[index].len); |
676 |
|
|
677 |
} |
} |
678 |
|
|
679 |
int get_mcbpc_inter(Bitstream * bs) |
int |
680 |
|
get_mcbpc_inter(Bitstream * bs) |
681 |
{ |
{ |
682 |
|
|
683 |
uint32_t index; |
uint32_t index; |
684 |
|
|
685 |
while((index = CLIP(BitstreamShowBits(bs, 9), 256)) == 1) |
index = CLIP(BitstreamShowBits(bs, 9), 256); |
|
BitstreamSkip(bs, 9); |
|
686 |
|
|
687 |
BitstreamSkip(bs, mcbpc_inter_table[index].len); |
BitstreamSkip(bs, mcbpc_inter_table[index].len); |
688 |
|
|
690 |
|
|
691 |
} |
} |
692 |
|
|
693 |
int get_cbpy(Bitstream * bs, int intra) |
int |
694 |
|
get_cbpy(Bitstream * bs, |
695 |
|
int intra) |
696 |
{ |
{ |
697 |
|
|
698 |
int cbpy; |
int cbpy; |
708 |
|
|
709 |
} |
} |
710 |
|
|
711 |
int get_mv_data(Bitstream * bs) |
int |
712 |
|
get_mv_data(Bitstream * bs) |
713 |
{ |
{ |
714 |
|
|
715 |
uint32_t index; |
uint32_t index; |
719 |
|
|
720 |
index = BitstreamShowBits(bs, 12); |
index = BitstreamShowBits(bs, 12); |
721 |
|
|
722 |
if(index >= 512) |
if (index >= 512) { |
|
{ |
|
723 |
index = (index >> 8) - 2; |
index = (index >> 8) - 2; |
724 |
BitstreamSkip(bs, TMNMVtab0[index].len); |
BitstreamSkip(bs, TMNMVtab0[index].len); |
725 |
return TMNMVtab0[index].code; |
return TMNMVtab0[index].code; |
726 |
} |
} |
727 |
|
|
728 |
if(index >= 128) |
if (index >= 128) { |
|
{ |
|
729 |
index = (index >> 2) - 32; |
index = (index >> 2) - 32; |
730 |
BitstreamSkip(bs, TMNMVtab1[index].len); |
BitstreamSkip(bs, TMNMVtab1[index].len); |
731 |
return TMNMVtab1[index].code; |
return TMNMVtab1[index].code; |
738 |
|
|
739 |
} |
} |
740 |
|
|
741 |
int get_mv(Bitstream * bs, int fcode) |
int |
742 |
|
get_mv(Bitstream * bs, |
743 |
|
int fcode) |
744 |
{ |
{ |
745 |
|
|
746 |
int data; |
int data; |
760 |
|
|
761 |
} |
} |
762 |
|
|
763 |
int get_dc_dif(Bitstream * bs, uint32_t dc_size) |
int |
764 |
|
get_dc_dif(Bitstream * bs, |
765 |
|
uint32_t dc_size) |
766 |
{ |
{ |
767 |
|
|
768 |
int code = BitstreamGetBits(bs, dc_size); |
int code = BitstreamGetBits(bs, dc_size); |
775 |
|
|
776 |
} |
} |
777 |
|
|
778 |
int get_dc_size_lum(Bitstream * bs) |
int |
779 |
|
get_dc_size_lum(Bitstream * bs) |
780 |
{ |
{ |
781 |
|
|
782 |
int code, i; |
int code, i; |
783 |
|
|
784 |
code = BitstreamShowBits(bs, 11); |
code = BitstreamShowBits(bs, 11); |
785 |
|
|
786 |
for(i = 11; i > 3; i--) { |
for(i = 11; i > 3; i--) { |
797 |
} |
} |
798 |
|
|
799 |
|
|
800 |
int get_dc_size_chrom(Bitstream * bs) |
int |
801 |
|
get_dc_size_chrom(Bitstream * bs) |
802 |
{ |
{ |
803 |
|
|
804 |
uint32_t code, i; |
uint32_t code, i; |
805 |
|
|
806 |
code = BitstreamShowBits(bs, 12); |
code = BitstreamShowBits(bs, 12); |
807 |
|
|
808 |
for(i = 12; i > 2; i--) { |
for(i = 12; i > 2; i--) { |
817 |
|
|
818 |
} |
} |
819 |
|
|
820 |
int get_coeff(Bitstream * bs, int *run, int *last, int intra, int short_video_header) |
/***************************************************************************** |
821 |
|
* Local inlined function to "decode" written vlc codes |
822 |
|
****************************************************************************/ |
823 |
|
|
824 |
|
static __inline int |
825 |
|
get_coeff(Bitstream * bs, |
826 |
|
int *run, |
827 |
|
int *last, |
828 |
|
int intra, |
829 |
|
int short_video_header) |
830 |
{ |
{ |
831 |
|
|
832 |
uint32_t mode; |
uint32_t mode; |
|
const VLC *tab; |
|
833 |
int32_t level; |
int32_t level; |
834 |
|
REVERSE_EVENT *reverse_event; |
835 |
|
|
836 |
if(short_video_header) // inter-VLCs will be used for both intra and inter blocks |
if (short_video_header) /* inter-VLCs will be used for both intra and inter blocks */ |
837 |
intra = 0; |
intra = 0; |
838 |
|
|
839 |
tab = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
if (BitstreamShowBits(bs, 7) != ESCAPE) { |
840 |
|
reverse_event = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
841 |
|
|
842 |
if(tab->code == -1) |
if ((level = reverse_event->event.level) == 0) |
843 |
goto error; |
goto error; |
844 |
|
|
845 |
BitstreamSkip(bs, tab->len); |
*last = reverse_event->event.last; |
846 |
|
*run = reverse_event->event.run; |
847 |
|
|
848 |
if(tab->code != ESCAPE) { |
BitstreamSkip(bs, reverse_event->len); |
849 |
if(!intra) |
|
850 |
{ |
return BitstreamGetBits(bs, 1) ? -level : level; |
|
*run = (tab->code >> 4) & 255; |
|
|
level = tab->code & 15; |
|
|
*last = (tab->code >> 12) & 1; |
|
|
} |
|
|
else |
|
|
{ |
|
|
*run = (tab->code >> 8) & 255; |
|
|
level = tab->code & 255; |
|
|
*last = (tab->code >> 16) & 1; |
|
|
} |
|
|
return BitstreamGetBit(bs) ? -level : level; |
|
851 |
} |
} |
852 |
|
|
853 |
if(short_video_header) |
BitstreamSkip(bs, 7); |
854 |
{ |
|
855 |
// escape mode 4 - H.263 type, only used if short_video_header = 1 |
if (short_video_header) { |
856 |
|
/* escape mode 4 - H.263 type, only used if short_video_header = 1 */ |
857 |
*last = BitstreamGetBit(bs); |
*last = BitstreamGetBit(bs); |
858 |
*run = BitstreamGetBits(bs, 6); |
*run = BitstreamGetBits(bs, 6); |
859 |
level = BitstreamGetBits(bs, 8); |
level = BitstreamGetBits(bs, 8); |
860 |
|
|
861 |
if (level == 0 || level == 128) |
if (level == 0 || level == 128) |
862 |
DEBUG1("Illegal LEVEL for ESCAPE mode 4:", level); |
DPRINTF(DPRINTF_ERROR, "Illegal LEVEL for ESCAPE mode 4: %d", level); |
863 |
|
|
864 |
return (level >= 128 ? -(256 - level) : level); |
return (level << 24) >> 24; |
865 |
} |
} |
866 |
|
|
867 |
mode = BitstreamShowBits(bs, 2); |
mode = BitstreamShowBits(bs, 2); |
869 |
if(mode < 3) { |
if(mode < 3) { |
870 |
BitstreamSkip(bs, (mode == 2) ? 2 : 1); |
BitstreamSkip(bs, (mode == 2) ? 2 : 1); |
871 |
|
|
872 |
tab = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
reverse_event = &DCT3D[intra][BitstreamShowBits(bs, 12)]; |
873 |
if (tab->code == -1) |
|
874 |
|
if ((level = reverse_event->event.level) == 0) |
875 |
goto error; |
goto error; |
876 |
|
|
877 |
BitstreamSkip(bs, tab->len); |
*last = reverse_event->event.last; |
878 |
|
*run = reverse_event->event.run; |
879 |
|
|
880 |
if (!intra) { |
BitstreamSkip(bs, reverse_event->len); |
|
*run = (tab->code >> 4) & 255; |
|
|
level = tab->code & 15; |
|
|
*last = (tab->code >> 12) & 1; |
|
|
} |
|
|
else |
|
|
{ |
|
|
*run = (tab->code >> 8) & 255; |
|
|
level = tab->code & 255; |
|
|
*last = (tab->code >> 16) & 1; |
|
|
} |
|
881 |
|
|
882 |
if(mode < 2) // first escape mode, level is offset |
if (mode < 2) /* first escape mode, level is offset */ |
883 |
level += max_level[*last + (!intra<<1)][*run]; // need to add back the max level |
level += max_level[intra][*last][*run]; |
884 |
else if(mode == 2) // second escape mode, run is offset |
else /* second escape mode, run is offset */ |
885 |
*run += max_run[*last + (!intra<<1)][level] + 1; |
*run += max_run[intra][*last][level] + 1; |
886 |
|
|
887 |
return BitstreamGetBit(bs) ? -level : level; |
return BitstreamGetBits(bs, 1) ? -level : level; |
888 |
} |
} |
889 |
|
|
890 |
// third escape mode - fixed length codes |
/* third escape mode - fixed length codes */ |
891 |
BitstreamSkip(bs, 2); |
BitstreamSkip(bs, 2); |
892 |
*last = BitstreamGetBits(bs, 1); |
*last = BitstreamGetBits(bs, 1); |
893 |
*run = BitstreamGetBits(bs, 6); |
*run = BitstreamGetBits(bs, 6); |
894 |
BitstreamSkip(bs, 1); // marker |
BitstreamSkip(bs, 1); /* marker */ |
895 |
level = BitstreamGetBits(bs, 12); |
level = BitstreamGetBits(bs, 12); |
896 |
BitstreamSkip(bs, 1); // marker |
BitstreamSkip(bs, 1); /* marker */ |
897 |
|
|
898 |
return (level & 0x800) ? (level | (-1 ^ 0xfff)) : level; |
return (level << 20) >> 20; |
899 |
|
|
900 |
error: |
error: |
901 |
*run = VLC_ERROR; |
*run = VLC_ERROR; |
902 |
return 0; |
return 0; |
|
|
|
903 |
} |
} |
904 |
|
|
905 |
|
/***************************************************************************** |
906 |
void get_intra_block(Bitstream * bs, int16_t * block, int direction, int coeff) |
* MB reading functions |
907 |
|
****************************************************************************/ |
908 |
|
|
909 |
|
void |
910 |
|
get_intra_block(Bitstream * bs, |
911 |
|
int16_t * block, |
912 |
|
int direction, |
913 |
|
int coeff) |
914 |
{ |
{ |
915 |
|
|
916 |
const uint16_t * scan = scan_tables[ direction ]; |
const uint16_t * scan = scan_tables[ direction ]; |
918 |
int run; |
int run; |
919 |
int last; |
int last; |
920 |
|
|
921 |
do |
do { |
|
{ |
|
922 |
level = get_coeff(bs, &run, &last, 1, 0); |
level = get_coeff(bs, &run, &last, 1, 0); |
923 |
if (run == -1) |
if (run == -1) { |
924 |
{ |
DPRINTF(DPRINTF_DEBUG, "fatal: invalid run"); |
|
DEBUG("fatal: invalid run"); |
|
925 |
break; |
break; |
926 |
} |
} |
927 |
coeff += run; |
coeff += run; |
928 |
block[ scan[coeff] ] = level; |
block[ scan[coeff] ] = level; |
929 |
if (level < -127 || level > 127) |
|
930 |
{ |
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[coeff], level); |
931 |
DEBUG1("warning: intra_overflow", level); |
/*DPRINTF(DPRINTF_COEFF,"block[%i] %i %08x", scan[coeff], level, BitstreamShowBits(bs, 32)); */ |
932 |
|
|
933 |
|
if (level < -2047 || level > 2047) { |
934 |
|
DPRINTF(DPRINTF_DEBUG, "warning: intra_overflow: %d", level); |
935 |
} |
} |
936 |
coeff++; |
coeff++; |
937 |
} while (!last); |
} while (!last); |
938 |
|
|
939 |
} |
} |
940 |
|
|
941 |
void get_inter_block(Bitstream * bs, int16_t * block) |
void |
942 |
|
get_inter_block(Bitstream * bs, |
943 |
|
int16_t * block) |
944 |
{ |
{ |
945 |
|
|
946 |
const uint16_t * scan = scan_tables[0]; |
const uint16_t * scan = scan_tables[0]; |
950 |
int last; |
int last; |
951 |
|
|
952 |
p = 0; |
p = 0; |
953 |
do |
do { |
|
{ |
|
954 |
level = get_coeff(bs, &run, &last, 0, 0); |
level = get_coeff(bs, &run, &last, 0, 0); |
955 |
if (run == -1) |
if (run == -1) { |
956 |
{ |
DPRINTF(DPRINTF_ERROR, "fatal: invalid run"); |
|
DEBUG("fatal: invalid run"); |
|
957 |
break; |
break; |
958 |
} |
} |
959 |
p += run; |
p += run; |
960 |
|
|
961 |
block[ scan[p] ] = level; |
block[ scan[p] ] = level; |
962 |
if (level < -127 || level > 127) |
|
963 |
{ |
DPRINTF(DPRINTF_COEFF,"block[%i] %i", scan[p], level); |
964 |
DEBUG1("warning: inter_overflow", level); |
|
965 |
|
if (level < -2047 || level > 2047) { |
966 |
|
DPRINTF(DPRINTF_DEBUG, "warning: inter_overflow: %d", level); |
967 |
} |
} |
968 |
p++; |
p++; |
969 |
} while (!last); |
} while (!last); |