mirror of
https://gitee.com/openharmony/third_party_ffmpeg
synced 2024-11-24 03:39:45 +00:00
756 lines
24 KiB
C
756 lines
24 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file intrax8.c
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* @brief IntraX8 (J-Frame) sub-decoder, used by wmv2 and vc1
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*/
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#include "avcodec.h"
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#include "bitstream.h"
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#include "mpegvideo.h"
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#include "msmpeg4data.h"
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#include "intrax8huf.h"
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#include "intrax8.h"
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#define MAX_TABLE_DEPTH(table_bits, max_bits) ((max_bits+table_bits-1)/table_bits)
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#define DC_VLC_BITS 9
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#define AC_VLC_BITS 9
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#define OR_VLC_BITS 7
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#define DC_VLC_MTD MAX_TABLE_DEPTH(DC_VLC_BITS, MAX_DC_VLC_BITS)
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#define AC_VLC_MTD MAX_TABLE_DEPTH(AC_VLC_BITS, MAX_AC_VLC_BITS)
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#define OR_VLC_MTD MAX_TABLE_DEPTH(OR_VLC_BITS, MAX_OR_VLC_BITS)
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static VLC j_ac_vlc[2][2][8]; //[quant<13],[intra/inter],[select]
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static VLC j_dc_vlc[2][8]; //[quant], [select]
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static VLC j_orient_vlc[2][4]; //[quant], [select]
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static void x8_vlc_init(){
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int i;
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#define init_ac_vlc(dst,src) \
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init_vlc(&dst, \
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AC_VLC_BITS,77, \
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&src[1],4,2, \
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&src[0],4,2, \
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1)
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//set ac tables
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for(i=0;i<8;i++){
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init_ac_vlc( j_ac_vlc[0][0][i], ff_x8_ac0_highquant_table[i][0] );
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init_ac_vlc( j_ac_vlc[0][1][i], ff_x8_ac1_highquant_table[i][0] );
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init_ac_vlc( j_ac_vlc[1][0][i], ff_x8_ac0_lowquant_table [i][0] );
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init_ac_vlc( j_ac_vlc[1][1][i], ff_x8_ac1_lowquant_table [i][0] );
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}
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#undef init_ac_vlc
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//set dc tables
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#define init_dc_vlc(dst,src) \
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init_vlc(&dst, \
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DC_VLC_BITS,34, \
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&src[1],4,2, \
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&src[0],4,2, \
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1);
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for(i=0;i<8;i++){
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init_dc_vlc( j_dc_vlc[0][i], ff_x8_dc_highquant_table[i][0]);
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init_dc_vlc( j_dc_vlc[1][i], ff_x8_dc_lowquant_table [i][0]);
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}
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#undef init_dc_vlc
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//set orient tables
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#define init_or_vlc(dst,src) \
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init_vlc(&dst, \
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OR_VLC_BITS,12, \
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&src[1],4,2, \
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&src[0],4,2, \
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1);
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for(i=0;i<2;i++){
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init_or_vlc( j_orient_vlc[0][i], ff_x8_orient_highquant_table[i][0]);
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}
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for(i=0;i<4;i++){
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init_or_vlc( j_orient_vlc[1][i], ff_x8_orient_lowquant_table [i][0])
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}
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}
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#undef init_or_vlc
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static inline void x8_reset_vlc_tables(IntraX8Context * w){
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memset(w->j_dc_vlc,0,sizeof(w->j_dc_vlc));
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memset(w->j_ac_vlc,0,sizeof(w->j_ac_vlc));
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w->j_orient_vlc=NULL;
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}
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static inline void x8_select_ac_table(IntraX8Context * const w , int mode){
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MpegEncContext * const s= w->s;
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int table_index;
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assert(mode<4);
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if( w->j_ac_vlc[mode] ) return;
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table_index = get_bits(&s->gb, 3);
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w->j_ac_vlc[mode] = &j_ac_vlc[w->quant<13][mode>>1][table_index];//2 modes use same tables
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assert(w->j_ac_vlc[mode]);
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}
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static inline int x8_get_orient_vlc(IntraX8Context * w){
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MpegEncContext * const s= w->s;
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int table_index;
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if(!w->j_orient_vlc ){
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table_index = get_bits(&s->gb, 1+(w->quant<13) );
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w->j_orient_vlc = &j_orient_vlc[w->quant<13][table_index];
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}
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assert(w->j_orient_vlc);
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assert(w->j_orient_vlc->table);
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return get_vlc2(&s->gb, w->j_orient_vlc->table, OR_VLC_BITS, OR_VLC_MTD);
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}
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#define extra_bits(eb) (eb)
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#define extra_run (0xFF<<8)
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#define extra_level (0x00<<8)
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#define run_offset(r) ((r)<<16)
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#define level_offset(l) ((l)<<24)
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static const uint32_t ac_decode_table[]={
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/*46*/ extra_bits(3) | extra_run | run_offset(16) | level_offset( 0),
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/*47*/ extra_bits(3) | extra_run | run_offset(24) | level_offset( 0),
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/*48*/ extra_bits(2) | extra_run | run_offset( 4) | level_offset( 1),
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/*49*/ extra_bits(3) | extra_run | run_offset( 8) | level_offset( 1),
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/*50*/ extra_bits(5) | extra_run | run_offset(32) | level_offset( 0),
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/*51*/ extra_bits(4) | extra_run | run_offset(16) | level_offset( 1),
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/*52*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset( 4),
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/*53*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset( 8),
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/*54*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset(12),
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/*55*/ extra_bits(3) | extra_level | run_offset( 0) | level_offset(16),
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/*56*/ extra_bits(3) | extra_level | run_offset( 0) | level_offset(24),
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/*57*/ extra_bits(2) | extra_level | run_offset( 1) | level_offset( 3),
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/*58*/ extra_bits(3) | extra_level | run_offset( 1) | level_offset( 7),
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/*59*/ extra_bits(2) | extra_run | run_offset(16) | level_offset( 0),
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/*60*/ extra_bits(2) | extra_run | run_offset(20) | level_offset( 0),
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/*61*/ extra_bits(2) | extra_run | run_offset(24) | level_offset( 0),
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/*62*/ extra_bits(2) | extra_run | run_offset(28) | level_offset( 0),
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/*63*/ extra_bits(4) | extra_run | run_offset(32) | level_offset( 0),
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/*64*/ extra_bits(4) | extra_run | run_offset(48) | level_offset( 0),
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/*65*/ extra_bits(2) | extra_run | run_offset( 4) | level_offset( 1),
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/*66*/ extra_bits(3) | extra_run | run_offset( 8) | level_offset( 1),
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/*67*/ extra_bits(4) | extra_run | run_offset(16) | level_offset( 1),
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/*68*/ extra_bits(2) | extra_level | run_offset( 0) | level_offset( 4),
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/*69*/ extra_bits(3) | extra_level | run_offset( 0) | level_offset( 8),
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/*70*/ extra_bits(4) | extra_level | run_offset( 0) | level_offset(16),
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/*71*/ extra_bits(2) | extra_level | run_offset( 1) | level_offset( 3),
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/*72*/ extra_bits(3) | extra_level | run_offset( 1) | level_offset( 7),
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};
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//extra_bits = 3bits; extra_run/level = 1 bit; run_offset = 6bits; level_offset = 5 bits;
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#undef extra_bits
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#undef extra_run
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#undef extra_level
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#undef run_offset
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#undef level_offset
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static void x8_get_ac_rlf(IntraX8Context * const w, const int mode,
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int * const run, int * const level, int * const final){
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MpegEncContext * const s= w->s;
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int i,e;
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// x8_select_ac_table(w,mode);
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i = get_vlc2(&s->gb, w->j_ac_vlc[mode]->table, AC_VLC_BITS, AC_VLC_MTD);
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if(i<46){ //[0-45]
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int t,l;
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if(i<0){
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(*level)=(*final)=//prevent 'may be used unilitialized'
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(*run)=64;//this would cause error exit in the ac loop
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return;
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}
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(*final) = t = (i>22);
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i-=23*t;
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/*
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i== 0-15 r=0-15 l=0 ;r=i& %01111
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i==16-19 r=0-3 l=1 ;r=i& %00011
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i==20-21 r=0-1 l=2 ;r=i& %00001
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i==22 r=0 l=3 ;r=i& %00000
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l=lut_l[i/2]={0,0,0,0,0,0,0,0,1,1,2,3}[i>>1];// 11 10'01 01'00 00'00 00'00 00'00 00 => 0xE50000
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t=lut_mask[l]={0x0f,0x03,0x01,0x00}[l]; as i<256 the higher bits doesn't matter */
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l=(0xE50000>>(i&(0x1E)))&3;/*0x1E or (~1) or ((i>>1)<<1)*/
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t=(0x01030F>>(l<<3));
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(*run) = i&t;
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(*level) = l;
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}else if(i<73){//[46-72]
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uint32_t sm;
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uint32_t mask;
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i-=46;
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sm=ac_decode_table[i];
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e=get_bits(&s->gb,sm&0xF);sm>>=8;//3bits
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mask=sm&0xff;sm>>=8; //1bit
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(*run) =(sm&0xff) + (e&( mask));//6bits
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(*level)=(sm>>8) + (e&(~mask));//5bits
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(*final)=i>(58-46);
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}else if(i<75){//[73-74]
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static const uint8_t crazy_mix_runlevel[32]={
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0x22,0x32,0x33,0x53,0x23,0x42,0x43,0x63,
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0x24,0x52,0x34,0x73,0x25,0x62,0x44,0x83,
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0x26,0x72,0x35,0x54,0x27,0x82,0x45,0x64,
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0x28,0x92,0x36,0x74,0x29,0xa2,0x46,0x84};
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(*final)=!(i&1);
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e=get_bits(&s->gb,5);//get the extra bits
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(*run) =crazy_mix_runlevel[e]>>4;
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(*level)=crazy_mix_runlevel[e]&0x0F;
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}else{
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(*level)=get_bits( &s->gb, 7-3*(i&1));
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(*run) =get_bits( &s->gb, 6);
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(*final)=get_bits1(&s->gb);
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}
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return;
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}
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//static const uint8_t dc_extra_sbits[] ={0, 1,1, 1,1, 2,2, 3,3, 4,4, 5,5, 6,6, 7,7 };
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static const uint8_t dc_index_offset[] ={ 0, 1,2, 3,4, 5,7, 9,13, 17,25, 33,49, 65,97, 129,193};
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static int x8_get_dc_rlf(IntraX8Context * const w,int const mode, int * const level, int * const final){
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MpegEncContext * const s= w->s;
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int i,e,c;
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assert(mode<3);
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if( !w->j_dc_vlc[mode] ) {
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int table_index;
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table_index = get_bits(&s->gb, 3);
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//4 modes, same table
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w->j_dc_vlc[mode]= &j_dc_vlc[w->quant<13][table_index];
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}
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assert(w->j_dc_vlc);
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assert(w->j_dc_vlc[mode]->table);
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i=get_vlc2(&s->gb, w->j_dc_vlc[mode]->table, DC_VLC_BITS, DC_VLC_MTD);
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/*(i>=17) {i-=17;final=1;}*/
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c= i>16;
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(*final)=c;
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i-=17*c;
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if(i<=0){
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(*level)=0;
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return -i;
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}
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c=(i+1)>>1;//hackish way to calculate dc_extra_sbits[]
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c-=c>1;
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e=get_bits(&s->gb,c);//get the extra bits
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i=dc_index_offset[i]+(e>>1);
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e= -(e & 1);//0,0xffffff
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(*level)= (i ^ e) - e;// (i^0)-0 , (i^0xff)-(-1)
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return 0;
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}
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//end of huffman
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static int x8_setup_spatial_predictor(IntraX8Context * const w, const int chroma){
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MpegEncContext * const s= w->s;
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int range;
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int sum;
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int quant;
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s->dsp.x8_setup_spacial_compensation(s->dest[chroma], s->edge_emu_buffer,
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s->current_picture.linesize[chroma>0],
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&range, &sum, w->edges);
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if(chroma){
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w->orient=w->chroma_orient;
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quant=w->quant_dc_chroma;
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}else{
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quant=w->quant;
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}
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w->flat_dc=0;
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if(range < quant || range < 3){
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w->orient=0;
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if(range < 3){//yep you read right, idct error of +-1 may break decoding!
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w->flat_dc=1;
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sum+=9;
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w->predicted_dc = (sum*6899)>>17;//((1<<17)+9)/(8+8+1+2)=6899
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}
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}
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if(chroma)
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return 0;
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assert(w->orient < 3);
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if(range < 2*w->quant){
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if( (w->edges&3) == 0){
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if(w->orient==1) w->orient=11;
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if(w->orient==2) w->orient=10;
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}else{
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w->orient=0;
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}
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w->raw_orient=0;
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}else{
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static const uint8_t prediction_table[3][12]={
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{0,8,4, 10,11, 2,6,9,1,3,5,7},
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{4,0,8, 11,10, 3,5,2,6,9,1,7},
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{8,0,4, 10,11, 1,7,2,6,9,3,5}
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};
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w->raw_orient=x8_get_orient_vlc(w);
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if(w->raw_orient<0) return -1;
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assert(w->raw_orient < 12 );
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assert(w->orient<3);
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w->orient=prediction_table[w->orient][w->raw_orient];
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}
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return 0;
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}
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static void x8_update_predictions(IntraX8Context * const w, const int orient, const int est_run ){
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MpegEncContext * const s= w->s;
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w->prediction_table[s->mb_x*2+(s->mb_y&1)] = (est_run<<2) + 1*(orient==4) + 2*(orient==8);
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/*
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y=2n+0 ->//0 2 4
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y=2n+1 ->//1 3 5
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*/
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}
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static void x8_get_prediction_chroma(IntraX8Context * const w){
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MpegEncContext * const s= w->s;
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w->edges = 1*( !(s->mb_x>>1) );
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w->edges|= 2*( !(s->mb_y>>1) );
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w->edges|= 4*( s->mb_x >= (2*s->mb_width-1) );//mb_x for chroma would always be odd
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w->raw_orient=0;
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if(w->edges&3){//lut_co[8]={inv,4,8,8, inv,4,8,8}<- =>{1,1,0,0;1,1,0,0} => 0xCC
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w->chroma_orient=4<<((0xCC>>w->edges)&1);
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return;
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}
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w->chroma_orient = (w->prediction_table[2*s->mb_x-2] & 0x03)<<2;//block[x-1][y|1-1)]
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}
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static void x8_get_prediction(IntraX8Context * const w){
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MpegEncContext * const s= w->s;
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int a,b,c,i;
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w->edges = 1*( !s->mb_x );
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w->edges|= 2*( !s->mb_y );
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w->edges|= 4*( s->mb_x >= (2*s->mb_width-1) );
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switch(w->edges&3){
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case 0:
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break;
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case 1:
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//take the one from the above block[0][y-1]
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w->est_run = w->prediction_table[!(s->mb_y&1)]>>2;
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w->orient = 1;
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return;
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case 2:
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//take the one from the previous block[x-1][0]
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w->est_run = w->prediction_table[2*s->mb_x-2]>>2;
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w->orient = 2;
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return;
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case 3:
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w->est_run = 16;
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w->orient = 0;
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return;
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}
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//no edge cases.
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b= w->prediction_table[2*s->mb_x + !(s->mb_y&1) ];//block[x ][y-1]
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a= w->prediction_table[2*s->mb_x-2 + (s->mb_y&1) ];//block[x-1][y ]
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c= w->prediction_table[2*s->mb_x-2 + !(s->mb_y&1) ];//block[x-1][y-1]
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w->est_run = FFMIN(b,a);
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/*this condition have nothing to do with w->edges, even if it looks similar
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it would triger if e.g. x=3;y=2;
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I guess somebody wrote something wrong and it became standard */
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if( (s->mb_x & s->mb_y) != 0 ) w->est_run=FFMIN(c,w->est_run);
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w->est_run>>=2;
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a&=3;
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b&=3;
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c&=3;
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i=( 0xFFEAF4C4>>(2*b+8*a) )&3;
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if(i!=3) w->orient=i;
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else w->orient=( 0xFFEAD8>>(2*c+8*(w->quant>12)) )&3;
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/*
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lut1[b][a]={
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->{0, 1, 0, pad},
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{0, 1, X, pad},
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{2, 2, 2, pad}}
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pad 2 2 2; pad X 1 0; pad 0 1 0 <-
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-> 11 10 '10 10 '11 11'01 00 '11 00'01 00=>0xEAF4C4
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lut2[q>12][c]={
|
|
->{0,2,1,pad},
|
|
{2,2,2,pad}}
|
|
pad 2 2 2; pad 1 2 0 <-
|
|
-> 11 10'10 10 '11 01'10 00=>0xEAD8
|
|
*/
|
|
}
|
|
|
|
|
|
static void x8_ac_compensation(IntraX8Context * const w, int const direction, int const dc_level){
|
|
MpegEncContext * const s= w->s;
|
|
int t;
|
|
#define B(x,y) s->block[0][s->dsp.idct_permutation[(x)+(y)*8]]
|
|
#define T(x) ((x) * dc_level + 0x8000) >> 16;
|
|
switch(direction){
|
|
case 0:
|
|
t = T(3811);//h
|
|
B(1,0) -= t;
|
|
B(0,1) -= t;
|
|
|
|
t = T(487);//e
|
|
B(2,0) -= t;
|
|
B(0,2) -= t;
|
|
|
|
t = T(506);//f
|
|
B(3,0) -= t;
|
|
B(0,3) -= t;
|
|
|
|
t = T(135);//c
|
|
B(4,0) -= t;
|
|
B(0,4) -= t;
|
|
B(2,1) += t;
|
|
B(1,2) += t;
|
|
B(3,1) += t;
|
|
B(1,3) += t;
|
|
|
|
t = T(173);//d
|
|
B(5,0) -= t;
|
|
B(0,5) -= t;
|
|
|
|
t = T(61);//b
|
|
B(6,0) -= t;
|
|
B(0,6) -= t;
|
|
B(5,1) += t;
|
|
B(1,5) += t;
|
|
|
|
t = T(42); //a
|
|
B(7,0) -= t;
|
|
B(0,7) -= t;
|
|
B(4,1) += t;
|
|
B(1,4) += t;
|
|
B(4,4) += t;
|
|
|
|
t = T(1084);//g
|
|
B(1,1) += t;
|
|
|
|
s->block_last_index[0] = FFMAX(s->block_last_index[0], 7*8);
|
|
break;
|
|
case 1:
|
|
B(0,1) -= T(6269);
|
|
B(0,3) -= T( 708);
|
|
B(0,5) -= T( 172);
|
|
B(0,7) -= T( 73);
|
|
|
|
s->block_last_index[0] = FFMAX(s->block_last_index[0], 7*8);
|
|
break;
|
|
case 2:
|
|
B(1,0) -= T(6269);
|
|
B(3,0) -= T( 708);
|
|
B(5,0) -= T( 172);
|
|
B(7,0) -= T( 73);
|
|
|
|
s->block_last_index[0] = FFMAX(s->block_last_index[0], 7);
|
|
break;
|
|
}
|
|
#undef B
|
|
#undef T
|
|
}
|
|
|
|
static void dsp_x8_put_solidcolor(uint8_t const pix, uint8_t * dst, int const linesize){
|
|
int k;
|
|
for(k=0;k<8;k++){
|
|
memset(dst,pix,8);
|
|
dst+=linesize;
|
|
}
|
|
}
|
|
|
|
static const int16_t quant_table[64] = {
|
|
256, 256, 256, 256, 256, 256, 259, 262,
|
|
265, 269, 272, 275, 278, 282, 285, 288,
|
|
292, 295, 299, 303, 306, 310, 314, 317,
|
|
321, 325, 329, 333, 337, 341, 345, 349,
|
|
353, 358, 362, 366, 371, 375, 379, 384,
|
|
389, 393, 398, 403, 408, 413, 417, 422,
|
|
428, 433, 438, 443, 448, 454, 459, 465,
|
|
470, 476, 482, 488, 493, 499, 505, 511
|
|
};
|
|
|
|
static int x8_decode_intra_mb(IntraX8Context* const w, const int chroma){
|
|
MpegEncContext * const s= w->s;
|
|
|
|
uint8_t * scantable;
|
|
int final,run,level;
|
|
int ac_mode,dc_mode,est_run,dc_level;
|
|
int pos,n;
|
|
int zeros_only;
|
|
int use_quant_matrix;
|
|
int sign;
|
|
|
|
assert(w->orient<12);
|
|
memset(s->block[0],0x00,64*sizeof(DCTELEM));
|
|
|
|
if(chroma){
|
|
dc_mode=2;
|
|
}else{
|
|
dc_mode=!!w->est_run;//0,1
|
|
}
|
|
|
|
if(x8_get_dc_rlf(w, dc_mode, &dc_level, &final)) return -1;
|
|
n=0;
|
|
zeros_only=0;
|
|
if(!final){//decode ac
|
|
use_quant_matrix=w->use_quant_matrix;
|
|
if(chroma){
|
|
ac_mode = 1;
|
|
est_run = 64;//not used
|
|
}else{
|
|
if (w->raw_orient < 3){
|
|
use_quant_matrix = 0;
|
|
}
|
|
if(w->raw_orient > 4){
|
|
ac_mode = 0;
|
|
est_run = 64;
|
|
}else{
|
|
if(w->est_run > 1){
|
|
ac_mode = 2;
|
|
est_run=w->est_run;
|
|
}else{
|
|
ac_mode = 3;
|
|
est_run = 64;
|
|
}
|
|
}
|
|
}
|
|
x8_select_ac_table(w,ac_mode);
|
|
/*scantable_selector[12]={0,2,0,1,1,1,0,2,2,0,1,2};<-
|
|
-> 10'01' 00'10' 10'00' 01'01' 01'00' 10'00 =>0x928548 */
|
|
scantable = w->scantable[ (0x928548>>(2*w->orient))&3 ].permutated;
|
|
pos=0;
|
|
do {
|
|
n++;
|
|
if( n >= est_run ){
|
|
ac_mode=3;
|
|
x8_select_ac_table(w,3);
|
|
}
|
|
|
|
x8_get_ac_rlf(w,ac_mode,&run,&level,&final);
|
|
|
|
pos+=run+1;
|
|
if(pos>63){
|
|
//this also handles vlc error in x8_get_ac_rlf
|
|
return -1;
|
|
}
|
|
level= (level+1) * w->dquant;
|
|
level+= w->qsum;
|
|
|
|
sign = - get_bits1(&s->gb);
|
|
level = (level ^ sign) - sign;
|
|
|
|
if(use_quant_matrix){
|
|
level = (level*quant_table[pos])>>8;
|
|
}
|
|
s->block[0][ scantable[pos] ]=level;
|
|
}while(!final);
|
|
|
|
s->block_last_index[0]=pos;
|
|
}else{//DC only
|
|
s->block_last_index[0]=0;
|
|
if(w->flat_dc && ((unsigned)(dc_level+1)) < 3){//[-1;1]
|
|
int32_t divide_quant= !chroma ? w->divide_quant_dc_luma:
|
|
w->divide_quant_dc_chroma;
|
|
int32_t dc_quant = !chroma ? w->quant:
|
|
w->quant_dc_chroma;
|
|
|
|
//original intent dc_level+=predicted_dc/quant; but it got lost somewhere in the rounding
|
|
dc_level+= (w->predicted_dc*divide_quant + (1<<12) )>>13;
|
|
|
|
dsp_x8_put_solidcolor( av_clip_uint8((dc_level*dc_quant+4)>>3),
|
|
s->dest[chroma], s->current_picture.linesize[!!chroma]);
|
|
|
|
goto block_placed;
|
|
}
|
|
zeros_only = (dc_level == 0);
|
|
}
|
|
if(!chroma){
|
|
s->block[0][0] = dc_level*w->quant;
|
|
}else{
|
|
s->block[0][0] = dc_level*w->quant_dc_chroma;
|
|
}
|
|
|
|
//there is !zero_only check in the original, but dc_level check is enough
|
|
if( (unsigned int)(dc_level+1) >= 3 && (w->edges&3) != 3 ){
|
|
int direction;
|
|
/*ac_comp_direction[orient] = { 0, 3, 3, 1, 1, 0, 0, 0, 2, 2, 2, 1 };<-
|
|
-> 01'10' 10'10' 00'00' 00'01' 01'11' 11'00 =>0x6A017C */
|
|
direction= (0x6A017C>>(w->orient*2))&3;
|
|
if (direction != 3){
|
|
x8_ac_compensation(w, direction, s->block[0][0]);//modify block_last[]
|
|
}
|
|
}
|
|
|
|
if(w->flat_dc){
|
|
dsp_x8_put_solidcolor(w->predicted_dc, s->dest[chroma], s->current_picture.linesize[!!chroma]);
|
|
}else{
|
|
s->dsp.x8_spacial_compensation[w->orient]( s->edge_emu_buffer,
|
|
s->dest[chroma],
|
|
s->current_picture.linesize[!!chroma] );
|
|
}
|
|
if(!zeros_only)
|
|
s->dsp.idct_add ( s->dest[chroma],
|
|
s->current_picture.linesize[!!chroma],
|
|
s->block[0] );
|
|
|
|
block_placed:
|
|
|
|
if(!chroma){
|
|
x8_update_predictions(w,w->orient,n);
|
|
}
|
|
|
|
if(s->loop_filter){
|
|
uint8_t* ptr = s->dest[chroma];
|
|
int linesize = s->current_picture.linesize[!!chroma];
|
|
|
|
if(!( (w->edges&2) || ( zeros_only && (w->orient|4)==4 ) )){
|
|
s->dsp.x8_h_loop_filter(ptr, linesize, w->quant);
|
|
}
|
|
if(!( (w->edges&1) || ( zeros_only && (w->orient|8)==8 ) )){
|
|
s->dsp.x8_v_loop_filter(ptr, linesize, w->quant);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static inline void x8_init_block_index(MpegEncContext *s){ //FIXME maybe merge with ff_*
|
|
//not s->linesize as this would be wrong for field pics
|
|
//not that IntraX8 have interlace support ;)
|
|
const int linesize = s->current_picture.linesize[0];
|
|
const int uvlinesize= s->current_picture.linesize[1];
|
|
|
|
s->dest[0] = s->current_picture.data[0];
|
|
s->dest[1] = s->current_picture.data[1];
|
|
s->dest[2] = s->current_picture.data[2];
|
|
|
|
s->dest[0] += s->mb_y * linesize << 3;
|
|
s->dest[1] += ( s->mb_y&(~1) ) * uvlinesize << 2;//chroma blocks are on add rows
|
|
s->dest[2] += ( s->mb_y&(~1) ) * uvlinesize << 2;
|
|
}
|
|
|
|
/**
|
|
* Initialize IntraX8 frame decoder.
|
|
* Requires valid MpegEncContext with valid s->mb_width before calling.
|
|
* @param w pointer to IntraX8Context
|
|
* @param s pointer to MpegEncContext of the parent codec
|
|
*/
|
|
void ff_intrax8_common_init(IntraX8Context * w, MpegEncContext * const s){
|
|
|
|
w->s=s;
|
|
x8_vlc_init();
|
|
assert(s->mb_width>0);
|
|
w->prediction_table=av_mallocz(s->mb_width*2*2);//two rows, 2 blocks per cannon mb
|
|
|
|
ff_init_scantable(s->dsp.idct_permutation, &w->scantable[0], wmv1_scantable[0]);
|
|
ff_init_scantable(s->dsp.idct_permutation, &w->scantable[1], wmv1_scantable[2]);
|
|
ff_init_scantable(s->dsp.idct_permutation, &w->scantable[2], wmv1_scantable[3]);
|
|
}
|
|
|
|
/**
|
|
* Decode single IntraX8 frame.
|
|
* The parent codec must fill s->loopfilter and s->gb (bitstream).
|
|
* The parent codec must call MPV_frame_start(), ff_er_frame_start() before calling this function
|
|
* The parent codec must call ff_er_frame_end(), MPV_frame_end() after calling this function.
|
|
* This function does not use MPV_decode_mb().
|
|
* lowres decoding is theoretically impossible.
|
|
* @param w pointer to IntraX8Context
|
|
* @param dquant doubled quantizer, it would be odd in case of vc1 halfpq==1
|
|
* @param quant_offset offset away from zero.
|
|
*/
|
|
//FIXME extern uint8_t wmv3_dc_scale_table[32];
|
|
int ff_intrax8_decode_picture(IntraX8Context * const w, int dquant, int quant_offset){
|
|
MpegEncContext * const s= w->s;
|
|
int mb_xy;
|
|
assert(s);
|
|
w->use_quant_matrix = get_bits1(&s->gb);
|
|
|
|
w->dquant = dquant;
|
|
w->quant = dquant >> 1;
|
|
w->qsum = quant_offset;
|
|
|
|
w->divide_quant_dc_luma = ((1<<16) + (w->quant>>1)) / w->quant;
|
|
if(w->quant < 5){
|
|
w->quant_dc_chroma = w->quant;
|
|
w->divide_quant_dc_chroma = w->divide_quant_dc_luma;
|
|
}else{
|
|
w->quant_dc_chroma = w->quant+((w->quant+3)>>3);
|
|
w->divide_quant_dc_chroma = ((1<<16) + (w->quant_dc_chroma>>1)) / w->quant_dc_chroma;
|
|
}
|
|
x8_reset_vlc_tables(w);
|
|
|
|
s->resync_mb_x=0;
|
|
s->resync_mb_y=0;
|
|
|
|
for(s->mb_y=0; s->mb_y < s->mb_height*2; s->mb_y++){
|
|
x8_init_block_index(s);
|
|
mb_xy=(s->mb_y>>1)*s->mb_stride;
|
|
|
|
for(s->mb_x=0; s->mb_x < s->mb_width*2; s->mb_x++){
|
|
x8_get_prediction(w);
|
|
if(x8_setup_spatial_predictor(w,0)) goto error;
|
|
if(x8_decode_intra_mb(w,0)) goto error;
|
|
|
|
if( s->mb_x & s->mb_y & 1 ){
|
|
x8_get_prediction_chroma(w);
|
|
|
|
/*when setting up chroma, no vlc is read,
|
|
so no error condition could be reached*/
|
|
x8_setup_spatial_predictor(w,1);
|
|
if(x8_decode_intra_mb(w,1)) goto error;
|
|
|
|
x8_setup_spatial_predictor(w,2);
|
|
if(x8_decode_intra_mb(w,2)) goto error;
|
|
|
|
s->dest[1]+= 8;
|
|
s->dest[2]+= 8;
|
|
|
|
/*emulate MB info in the relevant tables*/
|
|
s->mbskip_table [mb_xy]=0;
|
|
s->mbintra_table[mb_xy]=1;
|
|
s->current_picture.qscale_table[mb_xy]=w->quant;
|
|
mb_xy++;
|
|
}
|
|
s->dest[0]+= 8;
|
|
}
|
|
if(s->mb_y&1){
|
|
ff_draw_horiz_band(s, (s->mb_y-1)*8, 16);
|
|
}
|
|
}
|
|
|
|
error:
|
|
ff_er_add_slice(s, s->resync_mb_x, s->resync_mb_y,
|
|
(s->mb_x>>1)-1, (s->mb_y>>1)-1,
|
|
(AC_END|DC_END|MV_END) );
|
|
return 0;
|
|
}
|