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better/cleaner error resilience (done in a 2nd pass after decoding)

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h263/mpeg4 out of order slice decoding

Originally committed as revision 1030 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2002-10-13 13:16:04 +00:00
parent 46de8b7334
commit 4d2858deac
12 changed files with 1714 additions and 681 deletions
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13
ffmpeg.c
View File

@ -114,8 +114,9 @@ static int b_frames = 0;
static int use_hq = 0;
static int use_4mv = 0;
static int do_deinterlace = 0;
static int workaround_bugs = 0;
static int error_resilience = 0;
static int workaround_bugs = FF_BUG_AUTODETECT;
static int error_resilience = 2;
static int error_concealment = 3;
static int dct_algo = 0;
static int idct_algo = 0;
static int use_part = 0;
@ -1462,6 +1463,12 @@ void opt_error_resilience(const char *arg)
error_resilience = atoi(arg);
}
void opt_error_concealment(const char *arg)
{
error_concealment = atoi(arg);
}
void opt_frame_rate(const char *arg)
{
frame_rate = (int)(strtod(arg, 0) * FRAME_RATE_BASE);
@ -1823,6 +1830,7 @@ void opt_input_file(const char *filename)
rfps = ic->streams[i]->r_frame_rate;
enc->workaround_bugs = workaround_bugs;
enc->error_resilience = error_resilience;
enc->error_concealment = error_concealment;
enc->idct_algo= idct_algo;
if (enc->frame_rate != rfps) {
fprintf(stderr,"\nSeems that stream %d comes from film source: %2.2f->%2.2f\n",
@ -2394,6 +2402,7 @@ const OptionDef options[] = {
{ "dct_algo", HAS_ARG | OPT_EXPERT, {(void*)opt_dct_algo}, "set dct algo", "algo" },
{ "idct_algo", HAS_ARG | OPT_EXPERT, {(void*)opt_idct_algo}, "set idct algo", "algo" },
{ "er", HAS_ARG | OPT_EXPERT, {(void*)opt_error_resilience}, "set error resilience", "" },
{ "ec", HAS_ARG | OPT_EXPERT, {(void*)opt_error_resilience}, "set error concealment", "" },
{ "bf", HAS_ARG | OPT_EXPERT, {(void*)opt_b_frames}, "use 'frames' B frames (only MPEG-4)", "frames" },
{ "hq", OPT_BOOL | OPT_EXPERT, {(void*)&use_hq}, "activate high quality settings" },
{ "4mv", OPT_BOOL | OPT_EXPERT, {(void*)&use_4mv}, "use four motion vector by macroblock (only MPEG-4)" },

2
libavcodec/Makefile
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@ -15,7 +15,7 @@ OBJS= common.o utils.o mem.o allcodecs.o \
mpegaudio.o ac3enc.o mjpeg.o resample.o dsputil.o \
motion_est.o imgconvert.o imgresample.o msmpeg4.o \
mpeg12.o h263dec.o svq1.o rv10.o mpegaudiodec.o pcm.o simple_idct.o \
ratecontrol.o adpcm.o eval.o dv.o
ratecontrol.o adpcm.o eval.o dv.o error_resilience.o
ASM_OBJS=
# currently using liba52 for ac3 decoding

24
libavcodec/avcodec.h
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@ -5,8 +5,8 @@
#define LIBAVCODEC_VERSION_INT 0x000406
#define LIBAVCODEC_VERSION "0.4.6"
#define LIBAVCODEC_BUILD 4630
#define LIBAVCODEC_BUILD_STR "4630"
#define LIBAVCODEC_BUILD 4631
#define LIBAVCODEC_BUILD_STR "4631"
enum CodecID {
CODEC_ID_NONE,
@ -414,12 +414,19 @@ typedef struct AVCodecContext {
unsigned int codec_tag; /* codec tag, only used if unknown codec */
/**
* workaround bugs in encoders which cannot be detected automatically
* workaround bugs in encoders which sometimes cannot be detected automatically
* encoding: unused
* decoding: set by user
*/
int workaround_bugs;
#define FF_BUG_AUTODETECT 1 //autodetection
#define FF_BUG_OLD_MSMPEG4 2
#define FF_BUG_XVID_ILACE 4
#define FF_BUG_UMP4 8
#define FF_BUG_NO_PADDING 16
#define FF_BUG_AC_VLC 32
//#define FF_BUG_FAKE_SCALABILITY 16 //autodetection should work 100%
/**
* encoding: set by user
* decoding: unused
@ -715,6 +722,15 @@ typedef struct AVCodecContext {
*/
int *slice_offset;
/**
* error concealment flags
* encoding: unused
* decoding: set by user
*/
int error_concealment;
#define FF_EC_GUESS_MVS 1
#define FF_EC_DEBLOCK 2
//FIXME this should be reordered after kabis API is finished ...
//TODO kill kabi
/*

885
libavcodec/error_resilience.c Normal file
View File

@ -0,0 +1,885 @@
/*
* Error resilience / concealment
*
* Copyright (c) 2002 Michael Niedermayer <michaelni@gmx.at>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "avcodec.h"
#include "dsputil.h"
#include "mpegvideo.h"
/**
* replaces the current MB with a flat dc only version.
*/
static void put_dc(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int mb_x, int mb_y)
{
int dc, dcu, dcv, y, i;
for(i=0; i<4; i++){
dc= s->dc_val[0][mb_x*2+1 + (i&1) + (mb_y*2+1 + (i>>1))*(s->mb_width*2+2)];
if(dc<0) dc=0;
else if(dc>2040) dc=2040;
for(y=0; y<8; y++){
int x;
for(x=0; x<8; x++){
dest_y[x + (i&1)*8 + (y + (i>>1)*8)*s->linesize]= dc/8;
}
}
}
dcu = s->dc_val[1][mb_x+1 + (mb_y+1)*(s->mb_width+2)];
dcv = s->dc_val[2][mb_x+1 + (mb_y+1)*(s->mb_width+2)];
if (dcu<0 ) dcu=0;
else if(dcu>2040) dcu=2040;
if (dcv<0 ) dcv=0;
else if(dcv>2040) dcv=2040;
for(y=0; y<8; y++){
int x;
for(x=0; x<8; x++){
dest_cb[x + y*(s->uvlinesize)]= dcu/8;
dest_cr[x + y*(s->uvlinesize)]= dcv/8;
}
}
}
static void filter181(INT16 *data, int width, int height, int stride){
int x,y;
/* horizontal filter */
for(y=1; y<height-1; y++){
int prev_dc= data[0 + y*stride];
for(x=1; x<width-1; x++){
int dc;
dc= - prev_dc
+ data[x + y*stride]*8
- data[x + 1 + y*stride];
dc= (dc*10923 + 32768)>>16;
prev_dc= data[x + y*stride];
data[x + y*stride]= dc;
}
}
/* vertical filter */
for(x=1; x<width-1; x++){
int prev_dc= data[x];
for(y=1; y<height-1; y++){
int dc;
dc= - prev_dc
+ data[x + y *stride]*8
- data[x + (y+1)*stride];
dc= (dc*10923 + 32768)>>16;
prev_dc= data[x + y*stride];
data[x + y*stride]= dc;
}
}
}
/**
* guess the dc of blocks which dont have a undamaged dc
* @param w width in 8 pixel blocks
* @param h height in 8 pixel blocks
*/
static void guess_dc(MpegEncContext *s, INT16 *dc, int w, int h, int stride, int is_luma){
int b_x, b_y;
for(b_y=0; b_y<h; b_y++){
for(b_x=0; b_x<w; b_x++){
int color[4]={1024,1024,1024,1024};
int distance[4]={9999,9999,9999,9999};
int mb_index, error, j;
INT64 guess, weight_sum;
mb_index= (b_x>>is_luma) + (b_y>>is_luma)*s->mb_width;
error= s->error_status_table[mb_index];
if(!(s->mb_type[mb_index]&MB_TYPE_INTRA)) continue; //inter
if(!(error&DC_ERROR)) continue; //dc-ok
/* right block */
for(j=b_x+1; j<w; j++){
int mb_index_j= (j>>is_luma) + (b_y>>is_luma)*s->mb_width;
int error_j= s->error_status_table[mb_index_j];
int intra_j= s->mb_type[mb_index_j]&MB_TYPE_INTRA;
if(intra_j==0 || !(error_j&DC_ERROR)){
color[0]= dc[j + b_y*stride];
distance[0]= j-b_x;
break;
}
}
/* left block */
for(j=b_x-1; j>=0; j--){
int mb_index_j= (j>>is_luma) + (b_y>>is_luma)*s->mb_width;
int error_j= s->error_status_table[mb_index_j];
int intra_j= s->mb_type[mb_index_j]&MB_TYPE_INTRA;
if(intra_j==0 || !(error_j&DC_ERROR)){
color[1]= dc[j + b_y*stride];
distance[1]= b_x-j;
break;
}
}
/* bottom block */
for(j=b_y+1; j<h; j++){
int mb_index_j= (b_x>>is_luma) + (j>>is_luma)*s->mb_width;
int error_j= s->error_status_table[mb_index_j];
int intra_j= s->mb_type[mb_index_j]&MB_TYPE_INTRA;
if(intra_j==0 || !(error_j&DC_ERROR)){
color[2]= dc[b_x + j*stride];
distance[2]= j-b_y;
break;
}
}
/* top block */
for(j=b_y-1; j>=0; j--){
int mb_index_j= (b_x>>is_luma) + (j>>is_luma)*s->mb_width;
int error_j= s->error_status_table[mb_index_j];
int intra_j= s->mb_type[mb_index_j]&MB_TYPE_INTRA;
if(intra_j==0 || !(error_j&DC_ERROR)){
color[3]= dc[b_x + j*stride];
distance[3]= b_y-j;
break;
}
}
weight_sum=0;
guess=0;
for(j=0; j<4; j++){
INT64 weight= 256*256*256*16/distance[j];
guess+= weight*(INT64)color[j];
weight_sum+= weight;
}
guess= (guess + weight_sum/2) / weight_sum;
dc[b_x + b_y*stride]= guess;
}
}
}
/**
* simple horizontal deblocking filter used for error resilience
* @param w width in 8 pixel blocks
* @param h height in 8 pixel blocks
*/
static void h_block_filter(MpegEncContext *s, UINT8 *dst, int w, int h, int stride, int is_luma){
int b_x, b_y;
UINT8 *cm = cropTbl + MAX_NEG_CROP;
for(b_y=0; b_y<h; b_y++){
for(b_x=0; b_x<w-1; b_x++){
int y;
int left_status = s->error_status_table[( b_x >>is_luma) + (b_y>>is_luma)*s->mb_width];
int right_status= s->error_status_table[((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_width];
int left_intra= s->mb_type [( b_x >>is_luma) + (b_y>>is_luma)*s->mb_width]&MB_TYPE_INTRA;
int right_intra= s->mb_type [((b_x+1)>>is_luma) + (b_y>>is_luma)*s->mb_width]&MB_TYPE_INTRA;
int left_damage = left_status&(DC_ERROR|AC_ERROR|MV_ERROR);
int right_damage= right_status&(DC_ERROR|AC_ERROR|MV_ERROR);
int offset= b_x*8 + b_y*stride*8;
INT16 *left_mv= s->motion_val[s->block_wrap[0]*((b_y<<(1-is_luma)) + 1) + ( b_x <<(1-is_luma))];
INT16 *right_mv= s->motion_val[s->block_wrap[0]*((b_y<<(1-is_luma)) + 1) + ((b_x+1)<<(1-is_luma))];
if(!(left_damage||right_damage)) continue; // both undamaged
if( (!left_intra) && (!right_intra)
&& ABS(left_mv[0]-right_mv[0]) + ABS(left_mv[1]+right_mv[1]) < 2) continue;
for(y=0; y<8; y++){
int a,b,c,d;
a= dst[offset + 7 + y*stride] - dst[offset + 6 + y*stride];
b= dst[offset + 8 + y*stride] - dst[offset + 7 + y*stride];
c= dst[offset + 9 + y*stride] - dst[offset + 8 + y*stride];
d= ABS(b) - ((ABS(a) + ABS(c) + 1)>>1);
d= MAX(d, 0);
if(b<0) d= -d;
if(d==0) continue;
if(!(left_damage && right_damage))
d= d*16/9;
if(left_damage){
dst[offset + 7 + y*stride] = cm[dst[offset + 7 + y*stride] + ((d*7)>>4)];
dst[offset + 6 + y*stride] = cm[dst[offset + 6 + y*stride] + ((d*5)>>4)];
dst[offset + 5 + y*stride] = cm[dst[offset + 5 + y*stride] + ((d*3)>>4)];
dst[offset + 4 + y*stride] = cm[dst[offset + 4 + y*stride] + ((d*1)>>4)];
}
if(right_damage){
dst[offset + 8 + y*stride] = cm[dst[offset + 8 + y*stride] - ((d*7)>>4)];
dst[offset + 9 + y*stride] = cm[dst[offset + 9 + y*stride] - ((d*5)>>4)];
dst[offset + 10+ y*stride] = cm[dst[offset +10 + y*stride] - ((d*3)>>4)];
dst[offset + 11+ y*stride] = cm[dst[offset +11 + y*stride] - ((d*1)>>4)];
}
}
}
}
}
/**
* simple vertical deblocking filter used for error resilience
* @param w width in 8 pixel blocks
* @param h height in 8 pixel blocks
*/
static void v_block_filter(MpegEncContext *s, UINT8 *dst, int w, int h, int stride, int is_luma){
int b_x, b_y;
UINT8 *cm = cropTbl + MAX_NEG_CROP;
for(b_y=0; b_y<h-1; b_y++){
for(b_x=0; b_x<w; b_x++){
int x;
int top_status = s->error_status_table[(b_x>>is_luma) + ( b_y >>is_luma)*s->mb_width];
int bottom_status= s->error_status_table[(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_width];
int top_intra= s->mb_type [(b_x>>is_luma) + ( b_y >>is_luma)*s->mb_width]&MB_TYPE_INTRA;
int bottom_intra= s->mb_type [(b_x>>is_luma) + ((b_y+1)>>is_luma)*s->mb_width]&MB_TYPE_INTRA;
int top_damage = top_status&(DC_ERROR|AC_ERROR|MV_ERROR);
int bottom_damage= bottom_status&(DC_ERROR|AC_ERROR|MV_ERROR);
int offset= b_x*8 + b_y*stride*8;
INT16 *top_mv= s->motion_val[s->block_wrap[0]*(( b_y <<(1-is_luma)) + 1) + (b_x<<(1-is_luma))];
INT16 *bottom_mv= s->motion_val[s->block_wrap[0]*(((b_y+1)<<(1-is_luma)) + 1) + (b_x<<(1-is_luma))];
if(!(top_damage||bottom_damage)) continue; // both undamaged
if( (!top_intra) && (!bottom_intra)
&& ABS(top_mv[0]-bottom_mv[0]) + ABS(top_mv[1]+bottom_mv[1]) < 2) continue;
for(x=0; x<8; x++){
int a,b,c,d;
a= dst[offset + x + 7*stride] - dst[offset + x + 6*stride];
b= dst[offset + x + 8*stride] - dst[offset + x + 7*stride];
c= dst[offset + x + 9*stride] - dst[offset + x + 8*stride];
d= ABS(b) - ((ABS(a) + ABS(c)+1)>>1);
d= MAX(d, 0);
if(b<0) d= -d;
if(d==0) continue;
if(!(top_damage && bottom_damage))
d= d*16/9;
if(top_damage){
dst[offset + x + 7*stride] = cm[dst[offset + x + 7*stride] + ((d*7)>>4)];
dst[offset + x + 6*stride] = cm[dst[offset + x + 6*stride] + ((d*5)>>4)];
dst[offset + x + 5*stride] = cm[dst[offset + x + 5*stride] + ((d*3)>>4)];
dst[offset + x + 4*stride] = cm[dst[offset + x + 4*stride] + ((d*1)>>4)];
}
if(bottom_damage){
dst[offset + x + 8*stride] = cm[dst[offset + x + 8*stride] - ((d*7)>>4)];
dst[offset + x + 9*stride] = cm[dst[offset + x + 9*stride] - ((d*5)>>4)];
dst[offset + x + 10*stride] = cm[dst[offset + x + 10*stride] - ((d*3)>>4)];
dst[offset + x + 11*stride] = cm[dst[offset + x + 11*stride] - ((d*1)>>4)];
}
}
}
}
}
static void guess_mv(MpegEncContext *s){
UINT8 fixed[s->mb_num];
#define MV_FROZEN 3
#define MV_CHANGED 2
#define MV_UNCHANGED 1
const int mb_width = s->mb_width;
const int mb_height= s->mb_height;
int i, depth, num_avail;
num_avail=0;
for(i=0; i<s->mb_num; i++){
int f=0;
int error= s->error_status_table[i];
if(s->mb_type[i]&MB_TYPE_INTRA) f=MV_FROZEN; //intra //FIXME check
if(!(error&MV_ERROR)) f=MV_FROZEN; //inter with undamaged MV
fixed[i]= f;
if(f==MV_FROZEN)
num_avail++;
}
if((!(s->avctx->error_concealment&FF_EC_GUESS_MVS)) || num_avail <= mb_width/2){
int mb_x, mb_y;
i= -1;
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
i++;
if(s->mb_type[i]&MB_TYPE_INTRA) continue;
if(!(s->error_status_table[i]&MV_ERROR)) continue;
s->mv_dir = MV_DIR_FORWARD;
s->mb_intra=0;
s->mv_type = MV_TYPE_16X16;
s->mb_skiped=0;
clear_blocks(s->block[0]);
s->mb_x= mb_x;
s->mb_y= mb_y;
s->mv[0][0][0]= 0;
s->mv[0][0][1]= 0;
MPV_decode_mb(s, s->block);
}
}
return;
}
for(depth=0;; depth++){
int changed, pass, none_left;
none_left=1;
changed=1;
for(pass=0; (changed || pass<2) && pass<10; pass++){
int i,mb_x, mb_y;
int score_sum=0;
changed=0;
i= -1;
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
int mv_predictor[8][2]={{0}};
int pred_count=0;
int j;
int best_score=256*256*256*64;
int best_pred=0;
const int mot_stride= mb_width*2+2;
const int mot_index= mb_x*2 + 1 + (mb_y*2+1)*mot_stride;
int prev_x= s->motion_val[mot_index][0];
int prev_y= s->motion_val[mot_index][1];
i++;
if((mb_x^mb_y^pass)&1) continue;
if(fixed[i]==MV_FROZEN) continue;
j=0;
if(mb_x>0 && fixed[i-1 ]==MV_FROZEN) j=1;
if(mb_x+1<mb_width && fixed[i+1 ]==MV_FROZEN) j=1;
if(mb_y>0 && fixed[i-mb_width]==MV_FROZEN) j=1;
if(mb_y+1<mb_height && fixed[i+mb_width]==MV_FROZEN) j=1;
if(j==0) continue;
j=0;
if(mb_x>0 && fixed[i-1 ]==MV_CHANGED) j=1;
if(mb_x+1<mb_width && fixed[i+1 ]==MV_CHANGED) j=1;
if(mb_y>0 && fixed[i-mb_width]==MV_CHANGED) j=1;
if(mb_y+1<mb_height && fixed[i+mb_width]==MV_CHANGED) j=1;
if(j==0 && pass>1) continue;
none_left=0;
if(mb_x>0 && fixed[i-1]){
mv_predictor[pred_count][0]= s->motion_val[mot_index - 2][0];
mv_predictor[pred_count][1]= s->motion_val[mot_index - 2][1];
pred_count++;
}
if(mb_x+1<mb_width && fixed[i+1]){
mv_predictor[pred_count][0]= s->motion_val[mot_index + 2][0];
mv_predictor[pred_count][1]= s->motion_val[mot_index + 2][1];
pred_count++;
}
if(mb_y>0 && fixed[i-mb_width]){
mv_predictor[pred_count][0]= s->motion_val[mot_index - mot_stride*2][0];
mv_predictor[pred_count][1]= s->motion_val[mot_index - mot_stride*2][1];
pred_count++;
}
if(mb_y+1<mb_height && fixed[i+mb_width]){
mv_predictor[pred_count][0]= s->motion_val[mot_index + mot_stride*2][0];
mv_predictor[pred_count][1]= s->motion_val[mot_index + mot_stride*2][1];
pred_count++;
}
if(pred_count==0) continue;
if(pred_count>1){
int sum_x=0, sum_y=0;
int max_x, max_y, min_x, min_y;
for(j=0; j<pred_count; j++){
sum_x+= mv_predictor[j][0];
sum_y+= mv_predictor[j][1];
}
/* mean */
mv_predictor[pred_count][0] = sum_x/j;
mv_predictor[pred_count][1] = sum_y/j;
/* median */
if(pred_count>=3){
min_y= min_x= 99999;
max_y= max_x=-99999;
}else{
min_x=min_y=max_x=max_y=0;
}
for(j=0; j<pred_count; j++){
max_x= MAX(max_x, mv_predictor[j][0]);
max_y= MAX(max_y, mv_predictor[j][1]);
min_x= MIN(min_x, mv_predictor[j][0]);
min_y= MIN(min_y, mv_predictor[j][1]);
}
mv_predictor[pred_count+1][0] = sum_x - max_x - min_x;
mv_predictor[pred_count+1][1] = sum_y - max_y - min_y;
if(pred_count==4){
mv_predictor[pred_count+1][0] /= 2;
mv_predictor[pred_count+1][1] /= 2;
}
pred_count+=2;
}
/* zero MV */
pred_count++;
/* last MV */
mv_predictor[pred_count][0]= s->motion_val[mot_index][0];
mv_predictor[pred_count][1]= s->motion_val[mot_index][1];
pred_count++;
s->mv_dir = MV_DIR_FORWARD;
s->mb_intra=0;
s->mv_type = MV_TYPE_16X16;
s->mb_skiped=0;
clear_blocks(s->block[0]);
s->mb_x= mb_x;
s->mb_y= mb_y;
for(j=0; j<pred_count; j++){
int score=0;
UINT8 *src= s->current_picture[0] + mb_x*16 + mb_y*16*s->linesize;
s->motion_val[mot_index][0]= s->mv[0][0][0]= mv_predictor[j][0];
s->motion_val[mot_index][1]= s->mv[0][0][1]= mv_predictor[j][1];
MPV_decode_mb(s, s->block);
if(mb_x>0 && fixed[i-1]){
int k;
for(k=0; k<16; k++)
score += ABS(src[k*s->linesize-1 ]-src[k*s->linesize ]);
}
if(mb_x+1<mb_width && fixed[i+1]){
int k;
for(k=0; k<16; k++)
score += ABS(src[k*s->linesize+15]-src[k*s->linesize+16]);
}
if(mb_y>0 && fixed[i-mb_width]){
int k;
for(k=0; k<16; k++)
score += ABS(src[k-s->linesize ]-src[k ]);
}
if(mb_y+1<mb_height && fixed[i+mb_width]){
int k;
for(k=0; k<16; k++)
score += ABS(src[k+s->linesize*15]-src[k+s->linesize*16]);
}
if(score <= best_score){ // <= will favor the last MV
best_score= score;
best_pred= j;
}
}
score_sum+= best_score;
//FIXME no need to set s->motion_val[mot_index][0] explicit
s->motion_val[mot_index][0]= s->mv[0][0][0]= mv_predictor[best_pred][0];
s->motion_val[mot_index][1]= s->mv[0][0][1]= mv_predictor[best_pred][1];
MPV_decode_mb(s, s->block);
if(s->mv[0][0][0] != prev_x || s->mv[0][0][1] != prev_y){
fixed[i]=MV_CHANGED;
changed++;
}else
fixed[i]=MV_UNCHANGED;
}
}
// printf(".%d/%d", changed, score_sum); fflush(stdout);
}
if(none_left)
return;
for(i=0; i<s->mb_num; i++){
if(fixed[i])
fixed[i]=MV_FROZEN;
}
// printf(":"); fflush(stdout);
}
}
static int is_intra_more_likely(MpegEncContext *s){
int is_intra_likely, i, j, undamaged_count, skip_amount, mb_x, mb_y;
undamaged_count=0;
for(i=0; i<s->mb_num; i++){
int error= s->error_status_table[i];
if(!((error&DC_ERROR) && (error&MV_ERROR)))
undamaged_count++;
}
if(undamaged_count < 5) return 0; //allmost all MBs damaged -> use temporal prediction
skip_amount= MAX(undamaged_count/50, 1); //check only upto 50 MBs
is_intra_likely=0;
j=0;
i=-1;
for(mb_y= 0; mb_y<s->mb_height-1; mb_y++){
for(mb_x= 0; mb_x<s->mb_width; mb_x++){
int error;
i++;
error= s->error_status_table[i];
if((error&DC_ERROR) && (error&MV_ERROR))
continue; //skip damaged
j++;
if((j%skip_amount) != 0) continue; //skip a few to speed things up
if(s->pict_type==I_TYPE){
UINT8 *mb_ptr = s->current_picture[0] + mb_x*16 + mb_y*16*s->linesize;
UINT8 *last_mb_ptr= s->last_picture [0] + mb_x*16 + mb_y*16*s->linesize;
is_intra_likely += pix_abs16x16(last_mb_ptr, mb_ptr , s->linesize);
is_intra_likely -= pix_abs16x16(last_mb_ptr, last_mb_ptr+s->linesize*16, s->linesize);
}else{
if(s->mbintra_table[i]) //HACK (this is allways inited but we should use mb_type[])
is_intra_likely++;
else
is_intra_likely--;
}
}
}
//printf("is_intra_likely: %d type:%d\n", is_intra_likely, s->pict_type);
return is_intra_likely > 0;
}
void ff_error_resilience(MpegEncContext *s){
int i, mb_x, mb_y, error, error_type;
int distance;
int threshold_part[4]= {100,100,100};
int threshold= 50;
int is_intra_likely;
#if 1
/* handle overlapping slices */
for(error_type=1; error_type<=3; error_type++){
int end_ok=0;
for(i=s->mb_num-1; i>=0; i--){
int error= s->error_status_table[i];
if(error&(1<<error_type))
end_ok=1;
if(error&(8<<error_type))
end_ok=1;
if(!end_ok)
s->error_status_table[i]|= 1<<error_type;
if(error&VP_START)
end_ok=0;
}
}
#endif
#if 1
/* handle slices with partitions of different length */
if(s->partitioned_frame){
int end_ok=0;
for(i=s->mb_num-1; i>=0; i--){
int error= s->error_status_table[i];
if(error&AC_END)
end_ok=0;
if((error&MV_END) || (error&DC_END) || (error&AC_ERROR))
end_ok=1;
if(!end_ok)
s->error_status_table[i]|= AC_ERROR;
if(error&VP_START)
end_ok=0;
}
}
#endif
/* handle missing slices */
if(s->error_resilience>=4){
int end_ok=1;
for(i=s->mb_num-2; i>=s->mb_width+100; i--){ //FIXME +100 hack
int error1= s->error_status_table[i ];
int error2= s->error_status_table[i+1];
if(error1&VP_START)
end_ok=1;
if( error2==(VP_START|DC_ERROR|AC_ERROR|MV_ERROR|AC_END|DC_END|MV_END)
&& error1!=(VP_START|DC_ERROR|AC_ERROR|MV_ERROR|AC_END|DC_END|MV_END)
&& ((error1&AC_END) || (error1&DC_END) || (error1&MV_END))){ //end & uninited
end_ok=0;
}
if(!end_ok)
s->error_status_table[i]|= DC_ERROR|AC_ERROR|MV_ERROR;
}
}
#if 1
/* backward mark errors */
distance=9999999;
for(error_type=1; error_type<=3; error_type++){
for(i=s->mb_num-1; i>=0; i--){
int error= s->error_status_table[i];
if(!s->mbskip_table[i]) //FIXME partition specific
distance++;
if(error&(1<<error_type))
distance= 0;
if(s->partitioned_frame){
if(distance < threshold_part[error_type-1])
s->error_status_table[i]|= 1<<error_type;
}else{
if(distance < threshold)
s->error_status_table[i]|= 1<<error_type;
}
if(error&VP_START)
distance= 9999999;
}
}
#endif
/* forward mark errors */
error=0;
for(i=0; i<s->mb_num; i++){
int old_error= s->error_status_table[i];
if(old_error&VP_START)
error= old_error& (DC_ERROR|AC_ERROR|MV_ERROR);
else{
error|= old_error& (DC_ERROR|AC_ERROR|MV_ERROR);
s->error_status_table[i]|= error;
}
}
#if 1
/* handle not partitioned case */
if(!s->partitioned_frame){
for(i=0; i<s->mb_num; i++){
error= s->error_status_table[i];
if(error&(AC_ERROR|DC_ERROR|MV_ERROR))
error|= AC_ERROR|DC_ERROR|MV_ERROR;
s->error_status_table[i]= error;
}
}
#endif
is_intra_likely= is_intra_more_likely(s);
/* set unknown mb-type to most likely */
for(i=0; i<s->mb_num; i++){
int intra;
error= s->error_status_table[i];
if((error&DC_ERROR) && (error&MV_ERROR))
intra= is_intra_likely;
else
intra= s->mbintra_table[i];
if(intra)
s->mb_type[i]|= MB_TYPE_INTRA;
else
s->mb_type[i]&= ~MB_TYPE_INTRA;
}
/* handle inter blocks with damaged AC */
i= -1;
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
i++;
error= s->error_status_table[i];
if(s->mb_type[i]&MB_TYPE_INTRA) continue; //intra
if(error&MV_ERROR) continue; //inter with damaged MV
if(!(error&AC_ERROR)) continue; //undamaged inter
s->mv_dir = MV_DIR_FORWARD;
s->mb_intra=0;
s->mb_skiped=0;
if(s->mb_type[i]&MB_TYPE_INTER4V){
int mb_index= mb_x*2+1 + (mb_y*2+1)*s->block_wrap[0];
int j;
s->mv_type = MV_TYPE_8X8;
for(j=0; j<4; j++){
s->mv[0][j][0] = s->motion_val[ mb_index + (j&1) + (j>>1)*s->block_wrap[0] ][0];
s->mv[0][j][1] = s->motion_val[ mb_index + (j&1) + (j>>1)*s->block_wrap[0] ][1];
}
}else{
s->mv_type = MV_TYPE_16X16;
s->mv[0][0][0] = s->motion_val[ mb_x*2+1 + (mb_y*2+1)*s->block_wrap[0] ][0];
s->mv[0][0][1] = s->motion_val[ mb_x*2+1 + (mb_y*2+1)*s->block_wrap[0] ][1];
}
clear_blocks(s->block[0]);
s->mb_x= mb_x;
s->mb_y= mb_y;
MPV_decode_mb(s, s->block);
}
}
/* guess MVs */
if(s->pict_type==B_TYPE){
i= -1;
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
int xy= mb_x*2+1 + (mb_y*2+1)*s->block_wrap[0];
i++;
error= s->error_status_table[i];
if(s->mb_type[i]&MB_TYPE_INTRA) continue; //intra
if(!(error&MV_ERROR)) continue; //inter with undamaged MV
if(!(error&AC_ERROR)) continue; //undamaged inter
s->mv_dir = MV_DIR_FORWARD|MV_DIR_BACKWARD;
s->mb_intra=0;
s->mv_type = MV_TYPE_16X16;
s->mb_skiped=0;
if(s->pp_time){
int time_pp= s->pp_time;
int time_pb= s->pb_time;
s->mv[0][0][0] = s->motion_val[xy][0]*time_pb/time_pp;
s->mv[0][0][1] = s->motion_val[xy][1]*time_pb/time_pp;
s->mv[1][0][0] = s->motion_val[xy][0]*(time_pb - time_pp)/time_pp;
s->mv[1][0][1] = s->motion_val[xy][1]*(time_pb - time_pp)/time_pp;
}else{
s->mv[0][0][0]= 0;
s->mv[0][0][1]= 0;
s->mv[1][0][0]= 0;
s->mv[1][0][1]= 0;
}
clear_blocks(s->block[0]);
s->mb_x= mb_x;
s->mb_y= mb_y;
MPV_decode_mb(s, s->block);
}
}
}else
guess_mv(s);
/* fill DC for inter blocks */
i= -1;
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
int dc, dcu, dcv, y, n;
INT16 *dc_ptr;
UINT8 *dest_y, *dest_cb, *dest_cr;
i++;
error= s->error_status_table[i];
if(s->mb_type[i]&MB_TYPE_INTRA) continue; //intra
// if(error&MV_ERROR) continue; //inter data damaged FIXME is this good?
dest_y = s->current_picture[0] + mb_x*16 + mb_y*16*s->linesize;
dest_cb= s->current_picture[1] + mb_x*8 + mb_y*8 *s->uvlinesize;
dest_cr= s->current_picture[2] + mb_x*8 + mb_y*8 *s->uvlinesize;
dc_ptr= &s->dc_val[0][mb_x*2+1 + (mb_y*2+1)*(s->mb_width*2+2)];
for(n=0; n<4; n++){
dc=0;
for(y=0; y<8; y++){
int x;
for(x=0; x<8; x++){
dc+= dest_y[x + (n&1)*8 + (y + (n>>1)*8)*s->linesize];
}
}
dc_ptr[(n&1) + (n>>1)*(s->mb_width*2+2)]= (dc+4)>>3;
}
dcu=dcv=0;
for(y=0; y<8; y++){
int x;
for(x=0; x<8; x++){
dcu+=dest_cb[x + y*(s->uvlinesize)];
dcv+=dest_cr[x + y*(s->uvlinesize)];
}
}
s->dc_val[1][mb_x+1 + (mb_y+1)*(s->mb_width+2)]= (dcu+4)>>3;
s->dc_val[2][mb_x+1 + (mb_y+1)*(s->mb_width+2)]= (dcv+4)>>3;
}
}
#if 1
/* guess DC for damaged blocks */
guess_dc(s, s->dc_val[0] + s->mb_width*2+3, s->mb_width*2, s->mb_height*2, s->mb_width*2+2, 1);
guess_dc(s, s->dc_val[1] + s->mb_width +3, s->mb_width , s->mb_height , s->mb_width +2, 0);
guess_dc(s, s->dc_val[2] + s->mb_width +3, s->mb_width , s->mb_height , s->mb_width +2, 0);
#endif
/* filter luma DC */
filter181(s->dc_val[0] + s->mb_width*2+3, s->mb_width*2, s->mb_height*2, s->mb_width*2+2);
#if 1
/* render DC only intra */
i= -1;
for(mb_y=0; mb_y<s->mb_height; mb_y++){
for(mb_x=0; mb_x<s->mb_width; mb_x++){
UINT8 *dest_y, *dest_cb, *dest_cr;
i++;
error= s->error_status_table[i];
if(!(s->mb_type[i]&MB_TYPE_INTRA)) continue; //inter
if(!(error&AC_ERROR)) continue; //undamaged
dest_y = s->current_picture[0] + mb_x*16 + mb_y*16*s->linesize;
dest_cb= s->current_picture[1] + mb_x*8 + mb_y*8 *s->uvlinesize;
dest_cr= s->current_picture[2] + mb_x*8 + mb_y*8 *s->uvlinesize;
put_dc(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
}
}
#endif
if(s->avctx->error_concealment&FF_EC_DEBLOCK){
/* filter horizontal block boundaries */
h_block_filter(s, s->current_picture[0], s->mb_width*2, s->mb_height*2, s->linesize , 1);
h_block_filter(s, s->current_picture[1], s->mb_width , s->mb_height , s->uvlinesize, 0);
h_block_filter(s, s->current_picture[2], s->mb_width , s->mb_height , s->uvlinesize, 0);
/* filter vertical block boundaries */
v_block_filter(s, s->current_picture[0], s->mb_width*2, s->mb_height*2, s->linesize , 1);
v_block_filter(s, s->current_picture[1], s->mb_width , s->mb_height , s->uvlinesize, 0);
v_block_filter(s, s->current_picture[2], s->mb_width , s->mb_height , s->uvlinesize, 0);
}
/* clean a few tables */
for(i=0; i<s->mb_num; i++){
int error= s->error_status_table[i];
if(s->pict_type!=B_TYPE && (error&(DC_ERROR|MV_ERROR|AC_ERROR))){
s->mbskip_table[i]=0;
}
s->mbintra_table[i]=1;
}
}

701
libavcodec/h263.c
View File

File diff suppressed because it is too large Load Diff

391
libavcodec/h263dec.c
View File

@ -20,6 +20,12 @@
#include "dsputil.h"
#include "mpegvideo.h"
#if 1
#define PRINT_QP(a, b) {}
#else
#define PRINT_QP(a, b) printf(a, b)
#endif
//#define DEBUG
//#define PRINT_FRAME_TIME
#ifdef PRINT_FRAME_TIME
@ -34,6 +40,8 @@ static inline long long rdtsc()
}
#endif
const UINT16 ff_mpeg4_resync_prefix[8];
static int h263_decode_init(AVCodecContext *avctx)
{
MpegEncContext *s = avctx->priv_data;
@ -45,6 +53,11 @@ static int h263_decode_init(AVCodecContext *avctx)
s->height = avctx->height;
s->workaround_bugs= avctx->workaround_bugs;
// set defaults
s->quant_precision=5;
s->progressive_sequence=1;
s->decode_mb= ff_h263_decode_mb;
/* select sub codec */
switch(avctx->codec->id) {
case CODEC_ID_H263:
@ -115,7 +128,6 @@ static int h263_decode_end(AVCodecContext *avctx)
*/
static int get_consumed_bytes(MpegEncContext *s, int buf_size){
int pos= (get_bits_count(&s->gb)+7)>>3;
if(s->divx_version>=500){
//we would have to scan through the whole buf to handle the weird reordering ...
return buf_size;
@ -127,12 +139,144 @@ static int get_consumed_bytes(MpegEncContext *s, int buf_size){
}
}
static int decode_slice(MpegEncContext *s){
s->last_resync_gb= s->gb;
s->first_slice_line= 1;
s->resync_mb_x= s->mb_x;
s->resync_mb_y= s->mb_y;
s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
if(s->partitioned_frame){
const int qscale= s->qscale;
if(s->codec_id==CODEC_ID_MPEG4){
if(ff_mpeg4_decode_partitions(s) < 0)
return -1;
}
/* restore variables which where modified */
s->first_slice_line=1;
s->mb_x= s->resync_mb_x;
s->mb_y= s->resync_mb_y;
s->qscale= qscale;
s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
}
for(; s->mb_y < s->mb_height; s->mb_y++) {
/* per-row end of slice checks */
if(s->msmpeg4_version){
if(s->resync_mb_y + s->slice_height == s->mb_y){
const int xy= s->mb_x + s->mb_y*s->mb_width;
s->error_status_table[xy-1]|= AC_END|DC_END|MV_END;
return 0;
}
}
if(s->msmpeg4_version==1){
s->last_dc[0]=
s->last_dc[1]=
s->last_dc[2]= 128;
}
ff_init_block_index(s);
for(; s->mb_x < s->mb_width; s->mb_x++) {
int ret;
ff_update_block_index(s);
if(s->resync_mb_x == s->mb_x && s->resync_mb_y+1 == s->mb_y){
s->first_slice_line=0;
}
/* DCT & quantize */
clear_blocks(s->block[0]);
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16;
//printf("%d %d %06X\n", ret, get_bits_count(&s->gb), show_bits(&s->gb, 24));
ret= s->decode_mb(s, s->block);
PRINT_QP("%2d", s->qscale);
MPV_decode_mb(s, s->block);
if(ret<0){
const int xy= s->mb_x + s->mb_y*s->mb_width;
if(ret==SLICE_END){
//printf("%d %d %06X\n", s->mb_x, s->gb.size*8 - get_bits_count(&s->gb), show_bits(&s->gb, 24));
s->error_status_table[xy]|= AC_END;
if(!s->partitioned_frame)
s->error_status_table[xy]|= MV_END|DC_END;
if(++s->mb_x >= s->mb_width){
s->mb_x=0;
ff_draw_horiz_band(s);
s->mb_y++;
}
return 0;
}else if(ret==SLICE_NOEND){
fprintf(stderr,"Slice mismatch at MB: %d\n", xy);
return -1;
}
fprintf(stderr,"Error at MB: %d\n", xy);
s->error_status_table[xy]|= AC_ERROR;
if(!s->partitioned_frame)
s->error_status_table[xy]|= DC_ERROR|MV_ERROR;
return -1;
}
}
ff_draw_horiz_band(s);
PRINT_QP("%s", "\n");
s->mb_x= 0;
}
assert(s->mb_x==0 && s->mb_y==s->mb_height);
// handle formats which dont have unique end markers
if(s->msmpeg4_version || (s->workaround_bugs&FF_BUG_NO_PADDING)){ //FIXME perhaps solve this more cleanly
int left= s->gb.size*8 - get_bits_count(&s->gb);
int max_extra=7;
/* no markers in M$ crap */
if(s->msmpeg4_version && s->pict_type==I_TYPE)
max_extra+= 17;
/* buggy padding but the frame should still end approximately at the bitstream end */
if((s->workaround_bugs&FF_BUG_NO_PADDING) && s->error_resilience>=3)
max_extra+= 48;
else if((s->workaround_bugs&FF_BUG_NO_PADDING))
max_extra+= 256*256*256*64;
if(left>max_extra){
fprintf(stderr, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24));
}
else if(left<0){
fprintf(stderr, "overreading %d bits\n", -left);
}else
s->error_status_table[s->mb_num-1]|= AC_END|MV_END|DC_END;
return 0;
}
fprintf(stderr, "slice end not reached but screenspace end (%d left %06X)\n",
s->gb.size*8 - get_bits_count(&s->gb),
show_bits(&s->gb, 24));
return -1;
}
static int h263_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
UINT8 *buf, int buf_size)
{
MpegEncContext *s = avctx->priv_data;
int ret;
int ret,i;
AVPicture *pict = data;
#ifdef PRINT_FRAME_TIME
uint64_t time= rdtsc();
@ -145,10 +289,6 @@ uint64_t time= rdtsc();
s->hurry_up= avctx->hurry_up;
s->error_resilience= avctx->error_resilience;
s->workaround_bugs= avctx->workaround_bugs;
if(s->avctx->fourcc == ff_get_fourcc("XVIX") && s->workaround_bugs==0)
s->workaround_bugs=2;
s->flags= avctx->flags;
*data_size = 0;
@ -165,7 +305,7 @@ uint64_t time= rdtsc();
s->bitstream_buffer_size=0;
if (!s->context_initialized) {
if (MPV_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
if (DCT_common_init(s) < 0) //we need the idct permutaton for reading a custom matrix
return -1;
}
@ -181,6 +321,37 @@ uint64_t time= rdtsc();
ret = h263_decode_picture_header(s);
}
avctx->has_b_frames= s->has_b_frames;
if(s->workaround_bugs&FF_BUG_AUTODETECT){
if(s->avctx->fourcc == ff_get_fourcc("XVIX"))
s->workaround_bugs|= FF_BUG_XVID_ILACE;
if(s->avctx->fourcc == ff_get_fourcc("MP4S"))
s->workaround_bugs|= FF_BUG_AC_VLC;
if(s->avctx->fourcc == ff_get_fourcc("M4S2"))
s->workaround_bugs|= FF_BUG_AC_VLC;
if(s->avctx->fourcc == ff_get_fourcc("UMP4")){
s->workaround_bugs|= FF_BUG_UMP4;
s->workaround_bugs|= FF_BUG_AC_VLC;
}
if(s->divx_version==500)
s->workaround_bugs|= FF_BUG_NO_PADDING;
/* very ugly XVID padding bug detection FIXME/XXX solve this differently
* lets hope this at least works
*/
if( s->resync_marker==0 && s->data_partitioning==0 && s->divx_version==0
&& s->codec_id==CODEC_ID_MPEG4 && s->vo_type==0)
s->workaround_bugs|= FF_BUG_NO_PADDING;
if(s->lavc_build && s->lavc_build<4609) //FIXME not sure about the version num but a 4609 file seems ok
s->workaround_bugs|= FF_BUG_NO_PADDING;
}
#if 0 // dump bits per frame / qp / complexity
{
static FILE *f=NULL;
@ -210,10 +381,14 @@ uint64_t time= rdtsc();
avctx->aspected_width = s->aspected_width;
avctx->aspected_height = s->aspected_height;
}
if (s->codec_id==CODEC_ID_H263 && s->codec_id==CODEC_ID_H263)
s->gob_index = ff_h263_get_gob_height(s);
if (MPV_common_init(s) < 0)
return -1;
}
if(ret==FRAME_SKIPED) return get_consumed_bytes(s, buf_size);
/* skip if the header was thrashed */
if (ret < 0){
@ -238,12 +413,9 @@ uint64_t time= rdtsc();
printf("qscale=%d\n", s->qscale);
#endif
/* init resync/ error resilience specific variables */
s->next_resync_qscale= s->qscale;
s->next_resync_gb= s->gb;
if(s->resync_marker) s->mb_num_left= 0;
else s->mb_num_left= s->mb_num;
if(s->error_resilience)
memset(s->error_status_table, MV_ERROR|AC_ERROR|DC_ERROR|VP_START|AC_END|DC_END|MV_END, s->mb_num*sizeof(UINT8));
/* decode each macroblock */
s->block_wrap[0]=
s->block_wrap[1]=
@ -251,143 +423,25 @@ uint64_t time= rdtsc();
s->block_wrap[3]= s->mb_width*2 + 2;
s->block_wrap[4]=
s->block_wrap[5]= s->mb_width + 2;
for(s->mb_y=0; s->mb_y < s->mb_height; s->mb_y++) {
/* Check for GOB headers on H.263 */
/* FIXME: In the future H.263+ will have intra prediction */
/* and we are gonna need another way to detect MPEG4 */
if (s->mb_y && !s->h263_pred) {
s->first_slice_line = h263_decode_gob_header(s);
s->mb_x=0;
s->mb_y=0;
decode_slice(s);
s->error_status_table[0]|= VP_START;
while(s->mb_y<s->mb_height && s->gb.size*8 - get_bits_count(&s->gb)>32){
if(s->msmpeg4_version){
if(s->mb_x!=0 || (s->mb_y%s->slice_height)!=0)
break;
}else{
if(ff_h263_resync(s)<0)
break;
}
if(s->msmpeg4_version==1){
s->last_dc[0]=
s->last_dc[1]=
s->last_dc[2]= 128;
}
if(s->msmpeg4_version!=4)
ff_mpeg4_clean_buffers(s);
s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1;
s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1);
s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1;
s->block_index[3]= s->block_wrap[0]*(s->mb_y*2 + 2);
s->block_index[4]= s->block_wrap[4]*(s->mb_y + 1) + s->block_wrap[0]*(s->mb_height*2 + 2);
s->block_index[5]= s->block_wrap[4]*(s->mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2);
for(s->mb_x=0; s->mb_x < s->mb_width; s->mb_x++) {
s->block_index[0]+=2;
s->block_index[1]+=2;
s->block_index[2]+=2;
s->block_index[3]+=2;
s->block_index[4]++;
s->block_index[5]++;
#ifdef DEBUG
printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y);
#endif
if(s->resync_marker){
if(s->mb_num_left<=0){
/* except the first block */
if(s->mb_x!=0 || s->mb_y!=0){
/* did we miss the next resync marker without noticing an error yet */
if(((get_bits_count(&s->gb)+8)&(~7)) != s->next_resync_pos && s->decoding_error==0){
fprintf(stderr, "slice end missmatch x:%d y:%d %d %d\n",
s->mb_x, s->mb_y, get_bits_count(&s->gb), s->next_resync_pos);
ff_conceal_past_errors(s, 1);
}
}
s->qscale= s->next_resync_qscale;
s->y_dc_scale= s->y_dc_scale_table[ s->qscale ];
s->c_dc_scale= s->c_dc_scale_table[ s->qscale ];
s->gb= s->next_resync_gb;
s->resync_mb_x= s->mb_x; //we know that the marker is here cuz mb_num_left was the distance to it
s->resync_mb_y= s->mb_y;
s->first_slice_line=1;
if(s->codec_id==CODEC_ID_MPEG4){
ff_mpeg4_clean_buffers(s);
ff_mpeg4_resync(s);
}
}
if( s->resync_mb_x==s->mb_x
&& s->resync_mb_y==s->mb_y && s->decoding_error!=0){
fprintf(stderr, "resynced at %d %d\n", s->mb_x, s->mb_y);
s->decoding_error= 0;
}
}
//fprintf(stderr,"\nFrame: %d\tMB: %d",avctx->frame_number, (s->mb_y * s->mb_width) + s->mb_x);
/* DCT & quantize */
if(s->decoding_error!=DECODING_DESYNC){
int last_error= s->decoding_error;
clear_blocks(s->block[0]);
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16;
if (s->h263_msmpeg4) {
if (msmpeg4_decode_mb(s, s->block) < 0) {
fprintf(stderr,"Error at MB: %d\n", (s->mb_y * s->mb_width) + s->mb_x);
s->decoding_error=DECODING_DESYNC;
}
} else {
if (h263_decode_mb(s, s->block) < 0) {
fprintf(stderr,"Error at MB: %d\n", (s->mb_y * s->mb_width) + s->mb_x);
s->decoding_error=DECODING_DESYNC;
}
}
if(s->decoding_error!=last_error){
ff_conceal_past_errors(s, 0);
}
}
/* conceal errors */
if( s->decoding_error==DECODING_DESYNC
|| (s->decoding_error==DECODING_ACDC_LOST && s->mb_intra)){
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16;
s->mb_skiped=0;
s->mb_intra=0;
s->mv[0][0][0]=0; //FIXME this is not optimal
s->mv[0][0][1]=0;
clear_blocks(s->block[0]);
}else if(s->decoding_error && !s->mb_intra){
clear_blocks(s->block[0]);
}
//FIXME remove AC for intra
MPV_decode_mb(s, s->block);
s->mb_num_left--;
}
if ( avctx->draw_horiz_band
&& (s->num_available_buffers>=1 || (!s->has_b_frames)) ) {
UINT8 *src_ptr[3];
int y, h, offset;
y = s->mb_y * 16;
h = s->height - y;
if (h > 16)
h = 16;
if(s->pict_type==B_TYPE)
offset = 0;
else
offset = y * s->linesize;
if(s->pict_type==B_TYPE || (!s->has_b_frames)){
src_ptr[0] = s->current_picture[0] + offset;
src_ptr[1] = s->current_picture[1] + (offset >> 2);
src_ptr[2] = s->current_picture[2] + (offset >> 2);
} else {
src_ptr[0] = s->last_picture[0] + offset;
src_ptr[1] = s->last_picture[1] + (offset >> 2);
src_ptr[2] = s->last_picture[2] + (offset >> 2);
}
avctx->draw_horiz_band(avctx, src_ptr, s->linesize,
y, s->width, h);
}
decode_slice(s);
s->error_status_table[s->resync_mb_x + s->resync_mb_y*s->mb_width]|= VP_START;
}
if (s->h263_msmpeg4 && s->msmpeg4_version<4 && s->pict_type==I_TYPE)
@ -414,24 +468,37 @@ uint64_t time= rdtsc();
}
}
if(s->bitstream_buffer_size==0 && s->error_resilience>0){
int left= s->gb.size*8 - get_bits_count(&s->gb);
int max_extra=8;
if(s->codec_id==CODEC_ID_MPEG4) max_extra+=32;
if(s->error_resilience){
int error=0, num_end_markers=0;
for(i=0; i<s->mb_num; i++){
int status= s->error_status_table[i];
#if 0
if(i%s->mb_width == 0) printf("\n");
printf("%2X ", status);
#endif
if(status==0) continue;
if(left>max_extra){
fprintf(stderr, "discarding %d junk bits at end, next would be %X\n", left, show_bits(&s->gb, 24));
if(s->decoding_error==0)
ff_conceal_past_errors(s, 1);
if(status&(DC_ERROR|AC_ERROR|MV_ERROR))
error=1;
if(status&VP_START){
if(num_end_markers)
error=1;
num_end_markers=3;
}
if(status&AC_END)
num_end_markers--;
if(status&DC_END)
num_end_markers--;
if(status&MV_END)
num_end_markers--;
}
if(left<0){
fprintf(stderr, "overreading %d bits\n", -left);
if(s->decoding_error==0)
ff_conceal_past_errors(s, 1);
if(num_end_markers || error){
fprintf(stderr, "concealing errors\n");
//printf("type:%d\n", s->pict_type);
ff_error_resilience(s);
}
}
MPV_frame_end(s);
#if 0 //dirty show MVs, we should export the MV tables and write a filter to show them
{

4
libavcodec/mpeg4data.h
View File

@ -166,4 +166,6 @@ UINT8 ff_mpeg4_c_dc_scale_table[32]={
0, 8, 8, 8, 8, 9, 9,10,10,11,11,12,12,13,13,14,14,15,15,16,16,17,17,18,18,19,20,21,22,23,24,25
};
const UINT16 ff_mpeg4_resync_prefix[8]={
0x7F00, 0x7E00, 0x7C00, 0x7800, 0x7000, 0x6000, 0x4000, 0x0000
};

205
libavcodec/mpegvideo.c
View File

@ -134,19 +134,7 @@ static void convert_matrix(MpegEncContext *s, int (*qmat)[64], uint16_t (*qmat16
goto fail;\
}\
}
/*
static void build_end(void)
{
int lastIndex;
int lastIndexAfterPerm=0;
for(lastIndex=0; lastIndex<64; lastIndex++)
{
if(ff_zigzag_direct[lastIndex] > lastIndexAfterPerm)
lastIndexAfterPerm= ff_zigzag_direct[lastIndex];
zigzag_end[lastIndex]= lastIndexAfterPerm + 1;
}
}
*/
void ff_init_scantable(MpegEncContext *s, ScanTable *st, const UINT8 *src_scantable){
int i;
int end;
@ -343,6 +331,8 @@ int MPV_common_init(MpegEncContext *s)
}
CHECKED_ALLOCZ(s->avctx->stats_out, 256);
}
CHECKED_ALLOCZ(s->error_status_table, s->mb_num*sizeof(UINT8))
if (s->out_format == FMT_H263 || s->encoding) {
int size;
@ -355,11 +345,13 @@ int MPV_common_init(MpegEncContext *s)
}
if(s->codec_id==CODEC_ID_MPEG4){
/* 4mv and interlaced direct mode decoding tables */
CHECKED_ALLOCZ(s->co_located_type_table, s->mb_num * sizeof(UINT8))
/* interlaced direct mode decoding tables */
CHECKED_ALLOCZ(s->field_mv_table, s->mb_num*2*2 * sizeof(INT16))
CHECKED_ALLOCZ(s->field_select_table, s->mb_num*2* sizeof(INT8))
}
/* 4mv b frame decoding table */
//note this is needed for h263 without b frames too (segfault on damaged streams otherwise)
CHECKED_ALLOCZ(s->co_located_type_table, s->mb_num * sizeof(UINT8))
if (s->h263_pred || s->h263_plus) {
int y_size, c_size, i, size;
@ -400,7 +392,8 @@ int MPV_common_init(MpegEncContext *s)
s->picture_structure = PICT_FRAME;
/* init macroblock skip table */
CHECKED_ALLOCZ(s->mbskip_table, s->mb_num);
CHECKED_ALLOCZ(s->mbskip_table, s->mb_num+1);
//Note the +1 is for a quicker mpeg4 slice_end detection
s->block= s->blocks[0];
@ -453,6 +446,7 @@ void MPV_common_end(MpegEncContext *s)
av_freep(&s->field_select_table);
av_freep(&s->avctx->stats_out);
av_freep(&s->ac_stats);
av_freep(&s->error_status_table);
for(i=0;i<3;i++) {
int j;
@ -597,7 +591,7 @@ int MPV_encode_init(AVCodecContext *avctx)
s->unrestricted_mv = 1;
s->has_b_frames= s->max_b_frames ? 1 : 0;
s->low_delay= !s->has_b_frames;
avctx->delay= s->low_delay ? 0 : (s->max_b_frames + 1);
avctx->delay= s->low_delay ? 0 : (s->max_b_frames + 1);
break;
case CODEC_ID_MSMPEG4V1:
s->out_format = FMT_H263;
@ -767,7 +761,6 @@ void MPV_frame_start(MpegEncContext *s, AVCodecContext *avctx)
UINT8 *tmp;
s->mb_skiped = 0;
s->decoding_error=0;
avctx->mbskip_table= s->mbskip_table;
if(avctx->flags&CODEC_FLAG_DR1){
@ -1997,6 +1990,36 @@ static int pix_diff_vcmp16x8(UINT8 *s1, UINT8*s2, int stride){ //FIXME move to d
}
#endif
void ff_draw_horiz_band(MpegEncContext *s){
if ( s->avctx->draw_horiz_band
&& (s->num_available_buffers>=1 || (!s->has_b_frames)) ) {
UINT8 *src_ptr[3];
int y, h, offset;
y = s->mb_y * 16;
h = s->height - y;
if (h > 16)
h = 16;
if(s->pict_type==B_TYPE)
offset = 0;
else
offset = y * s->linesize;
if(s->pict_type==B_TYPE || (!s->has_b_frames)){
src_ptr[0] = s->current_picture[0] + offset;
src_ptr[1] = s->current_picture[1] + (offset >> 2);
src_ptr[2] = s->current_picture[2] + (offset >> 2);
} else {
src_ptr[0] = s->last_picture[0] + offset;
src_ptr[1] = s->last_picture[1] + (offset >> 2);
src_ptr[2] = s->last_picture[2] + (offset >> 2);
}
s->avctx->draw_horiz_band(s->avctx, src_ptr, s->linesize,
y, s->width, h);
}
}
static void encode_mb(MpegEncContext *s, int motion_x, int motion_y)
{
const int mb_x= s->mb_x;
@ -2539,23 +2562,17 @@ static void encode_picture(MpegEncContext *s, int picture_number)
s->last_mv[0][0][0] = 0;
s->last_mv[0][0][1] = 0;
/* Get the GOB height based on picture height */
if (s->out_format == FMT_H263 && !s->h263_pred && !s->h263_msmpeg4) {
if (s->height <= 400)
s->gob_index = 1;
else if (s->height <= 800)
s->gob_index = 2;
else
s->gob_index = 4;
}else if(s->codec_id==CODEC_ID_MPEG4){
s->gob_index = 1;
}
if (s->codec_id==CODEC_ID_H263 && s->codec_id==CODEC_ID_H263)
s->gob_index = ff_h263_get_gob_height(s);
else
s->gob_index = 1; //FIXME remove
if(s->codec_id==CODEC_ID_MPEG4 && s->data_partitioning && s->pict_type!=B_TYPE)
if(s->codec_id==CODEC_ID_MPEG4 && s->partitioned_frame)
ff_mpeg4_init_partitions(s);
s->resync_mb_x=0;
s->resync_mb_y=0;
s->first_slice_line = 1;
for(mb_y=0; mb_y < s->mb_height; mb_y++) {
/* Put GOB header based on RTP MTU for formats which support it per line (H263*)*/
/* TODO: Put all this stuff in a separate generic function */
@ -2599,7 +2616,7 @@ static void encode_picture(MpegEncContext *s, int picture_number)
s->block_index[3]+=2;
s->block_index[4]++;
s->block_index[5]++;
//printf("%d %d %d %d %d\n", s->mb_x, s->mb_y, s->resync_mb_x, s->resync_mb_y, s->first_slice_line);
/* write gob / video packet header for formats which support it at any MB (MPEG4) */
if(s->rtp_mode && s->mb_y>0 && s->codec_id==CODEC_ID_MPEG4){
int pdif= pbBufPtr(&s->pb) - s->ptr_lastgob;
@ -2607,7 +2624,7 @@ static void encode_picture(MpegEncContext *s, int picture_number)
//the *2 is there so we stay below the requested size
if(pdif + s->mb_line_avgsize/s->mb_width >= s->rtp_payload_size){
if(s->codec_id==CODEC_ID_MPEG4){
if(s->data_partitioning && s->pict_type!=B_TYPE){
if(s->partitioned_frame){
ff_mpeg4_merge_partitions(s);
ff_mpeg4_init_partitions(s);
}
@ -2625,11 +2642,11 @@ static void encode_picture(MpegEncContext *s, int picture_number)
s->resync_mb_x=mb_x;
s->resync_mb_y=mb_y;
}
}
if( (s->resync_mb_x == s->mb_x)
&& s->resync_mb_y+1 == s->mb_y){
s->first_slice_line=0;
}
if( (s->resync_mb_x == s->mb_x)
&& s->resync_mb_y+1 == s->mb_y){
s->first_slice_line=0;
}
if(mb_type & (mb_type-1)){ // more than 1 MB type possible
@ -2639,6 +2656,7 @@ static void encode_picture(MpegEncContext *s, int picture_number)
copy_context_before_encode(&backup_s, s, -1);
backup_s.pb= s->pb;
best_s.data_partitioning= s->data_partitioning;
best_s.partitioned_frame= s->partitioned_frame;
if(s->data_partitioning){
backup_s.pb2= s->pb2;
backup_s.tex_pb= s->tex_pb;
@ -2827,7 +2845,7 @@ static void encode_picture(MpegEncContext *s, int picture_number)
}
emms_c();
if(s->codec_id==CODEC_ID_MPEG4 && s->data_partitioning && s->pict_type!=B_TYPE)
if(s->codec_id==CODEC_ID_MPEG4 && s->partitioned_frame)
ff_mpeg4_merge_partitions(s);
if (s->msmpeg4_version && s->msmpeg4_version<4 && s->pict_type == I_TYPE)
@ -3090,119 +3108,6 @@ static void dct_unquantize_h263_c(MpegEncContext *s,
}
}
static void remove_ac(MpegEncContext *s, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int mb_x, int mb_y)
{
int dc, dcb, dcr, y, i;
for(i=0; i<4; i++){
dc= s->dc_val[0][mb_x*2+1 + (i&1) + (mb_y*2+1 + (i>>1))*(s->mb_width*2+2)];
for(y=0; y<8; y++){
int x;
for(x=0; x<8; x++){
dest_y[x + (i&1)*8 + (y + (i>>1)*8)*s->linesize]= dc/8;
}
}
}
dcb = s->dc_val[1][mb_x+1 + (mb_y+1)*(s->mb_width+2)];
dcr= s->dc_val[2][mb_x+1 + (mb_y+1)*(s->mb_width+2)];
for(y=0; y<8; y++){
int x;
for(x=0; x<8; x++){
dest_cb[x + y*(s->uvlinesize)]= dcb/8;
dest_cr[x + y*(s->uvlinesize)]= dcr/8;
}
}
}
/**
* will conceal past errors, and allso drop b frames if needed
*
*/
void ff_conceal_past_errors(MpegEncContext *s, int unknown_pos)
{
int mb_x= s->mb_x;
int mb_y= s->mb_y;
int mb_dist=0;
int i, intra_count=0, inter_count=0;
int intra_conceal= s->msmpeg4_version ? 50 : 50; //FIXME finetune
int inter_conceal= s->msmpeg4_version ? 50 : 50;
// for last block
if(mb_x>=s->mb_width) mb_x= s->mb_width -1;
if(mb_y>=s->mb_height) mb_y= s->mb_height-1;
if(s->decoding_error==0 && unknown_pos){
if(s->data_partitioning && s->pict_type!=B_TYPE)
s->decoding_error= DECODING_AC_LOST;
else
s->decoding_error= DECODING_DESYNC;
}
if(s->decoding_error==DECODING_DESYNC && s->pict_type!=B_TYPE) s->next_p_frame_damaged=1;
for(i=mb_x + mb_y*s->mb_width; i>=0; i--){
if(s->mbintra_table[i]) intra_count++;
else inter_count++;
}
if(s->decoding_error==DECODING_AC_LOST){
intra_conceal*=2;
inter_conceal*=2;
}else if(s->decoding_error==DECODING_ACDC_LOST){
intra_conceal*=2;
inter_conceal*=2;
}
if(unknown_pos && (intra_count<inter_count)){
intra_conceal= inter_conceal= s->mb_num;
// printf("%d %d\n",intra_count, inter_count);
}
fprintf(stderr, "concealing errors\n");
/* for all MBs from the current one back until the last resync marker */
for(; mb_y>=0 && mb_y>=s->resync_mb_y; mb_y--){
for(; mb_x>=0; mb_x--){
uint8_t *dest_y = s->current_picture[0] + (mb_y * 16* s->linesize ) + mb_x * 16;
uint8_t *dest_cb = s->current_picture[1] + (mb_y * 8 * (s->uvlinesize)) + mb_x * 8;
uint8_t *dest_cr = s->current_picture[2] + (mb_y * 8 * (s->uvlinesize)) + mb_x * 8;
int mb_x_backup= s->mb_x; //FIXME pass xy to mpeg_motion
int mb_y_backup= s->mb_y;
s->mb_x=mb_x;
s->mb_y=mb_y;
if(s->mbintra_table[mb_y*s->mb_width + mb_x] && mb_dist<intra_conceal){
if(s->decoding_error==DECODING_AC_LOST){
remove_ac(s, dest_y, dest_cb, dest_cr, mb_x, mb_y);
// printf("remove ac to %d %d\n", mb_x, mb_y);
}else{
mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
s->last_picture, 0, 0, put_pixels_tab,
0/*mx*/, 0/*my*/, 16);
}
}
else if(!s->mbintra_table[mb_y*s->mb_width + mb_x] && mb_dist<inter_conceal){
int mx=0;
int my=0;
if(s->decoding_error!=DECODING_DESYNC){
int xy= mb_x*2+1 + (mb_y*2+1)*(s->mb_width*2+2);
mx= s->motion_val[ xy ][0];
my= s->motion_val[ xy ][1];
}
mpeg_motion(s, dest_y, dest_cb, dest_cr, 0,
s->last_picture, 0, 0, put_pixels_tab,
mx, my, 16);
}
s->mb_x= mb_x_backup;
s->mb_y= mb_y_backup;
if(mb_x== s->resync_mb_x && mb_y== s->resync_mb_y) return;
if(!s->mbskip_table[mb_x + mb_y*s->mb_width]) mb_dist++;
}
mb_x=s->mb_width-1;
}
}
AVCodec mpeg1video_encoder = {
"mpeg1video",
CODEC_TYPE_VIDEO,

79
libavcodec/mpegvideo.h
View File

@ -322,16 +322,20 @@ typedef struct MpegEncContext {
int last_bits; //temp var used for calculating the above vars
/* error concealment / resync */
UINT8 *error_status_table; /* table of the error status of each MB */
#define VP_START 1 /* current MB is the first after a resync marker */
#define AC_ERROR 2
#define DC_ERROR 4
#define MV_ERROR 8
#define AC_END 16
#define DC_END 32
#define MV_END 64
//FIXME some prefix?
int resync_mb_x; /* x position of last resync marker */
int resync_mb_y; /* y position of last resync marker */
int mb_num_left; /* number of MBs left in this video packet */
GetBitContext next_resync_gb; /* starts at the next resync marker */
int next_resync_qscale; /* qscale of next resync marker */
int next_resync_pos; /* bitstream position of next resync marker */
#define DECODING_AC_LOST -1
#define DECODING_ACDC_LOST -2
#define DECODING_DESYNC -3
int decoding_error;
GetBitContext last_resync_gb; /* used to serach for the next resync marker */
int mb_num_left; /* number of MBs left in this video packet (for partitioned Slices only)*/
int next_p_frame_damaged; /* set if the next p frame is damaged, to avoid showing trashed b frames */
int error_resilience;
@ -381,7 +385,8 @@ typedef struct MpegEncContext {
int aspected_height;
int sprite_warping_accuracy;
int low_latency_sprite;
int data_partitioning;
int data_partitioning; /* data partitioning flag from header */
int partitioned_frame; /* is current frame partitioned */
int rvlc; /* reversible vlc */
int resync_marker; /* could this stream contain resync markers*/
int low_delay; /* no reordering needed / has no b-frames */
@ -407,6 +412,10 @@ typedef struct MpegEncContext {
UINT8 *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them
int bitstream_buffer_size;
/* lavc specific stuff, used to workaround bugs in libavcodec */
int ffmpeg_version;
int lavc_build;
/* RV10 specific */
int rv10_version; /* RV10 version: 0 or 3 */
int rv10_first_dc_coded[3];
@ -475,6 +484,12 @@ typedef struct MpegEncContext {
DCTELEM (*block)[64]; /* points to one of the following blocks */
DCTELEM blocks[2][6][64] __align8; // for HQ mode we need to keep the best block
int (*decode_mb)(struct MpegEncContext *s, DCTELEM block[6][64]); // used by some codecs to avoid a switch()
#define SLICE_OK 0
#define SLICE_ERROR -1
#define SLICE_END -2 //end marker found
#define SLICE_NOEND -3 //no end marker or error found but mb count exceeded
void (*dct_unquantize_mpeg1)(struct MpegEncContext *s,
DCTELEM *block, int n, int qscale);
void (*dct_unquantize_mpeg2)(struct MpegEncContext *s,
@ -489,6 +504,7 @@ typedef struct MpegEncContext {
void (*idct_add)(UINT8 *dest/*align 8*/, int line_size, DCTELEM *block/*align 16*/);
} MpegEncContext;
int DCT_common_init(MpegEncContext *s);
int MPV_common_init(MpegEncContext *s);
void MPV_common_end(MpegEncContext *s);
@ -512,9 +528,30 @@ void ff_conceal_past_errors(MpegEncContext *s, int conceal_all);
void ff_copy_bits(PutBitContext *pb, UINT8 *src, int length);
void ff_clean_intra_table_entries(MpegEncContext *s);
void ff_init_scantable(MpegEncContext *s, ScanTable *st, const UINT8 *src_scantable);
void ff_error_resilience(MpegEncContext *s);
void ff_draw_horiz_band(MpegEncContext *s);
extern int ff_bit_exact;
static inline void ff_init_block_index(MpegEncContext *s){
s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1 + s->mb_x*2;
s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1) + s->mb_x*2;
s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1 + s->mb_x*2;
s->block_index[3]= s->block_wrap[0]*(s->mb_y*2 + 2) + s->mb_x*2;
s->block_index[4]= s->block_wrap[4]*(s->mb_y + 1) + s->block_wrap[0]*(s->mb_height*2 + 2) + s->mb_x;
s->block_index[5]= s->block_wrap[4]*(s->mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2) + s->mb_x;
}
static inline void ff_update_block_index(MpegEncContext *s){
s->block_index[0]+=2;
s->block_index[1]+=2;
s->block_index[2]+=2;
s->block_index[3]+=2;
s->block_index[4]++;
s->block_index[5]++;
}
/* motion_est.c */
void ff_estimate_p_frame_motion(MpegEncContext * s,
int mb_x, int mb_y);
@ -524,6 +561,7 @@ int ff_get_best_fcode(MpegEncContext * s, int16_t (*mv_table)[2], int type);
void ff_fix_long_p_mvs(MpegEncContext * s);
void ff_fix_long_b_mvs(MpegEncContext * s, int16_t (*mv_table)[2], int f_code, int type);
/* mpeg12.c */
extern const INT16 ff_mpeg1_default_intra_matrix[64];
extern const INT16 ff_mpeg1_default_non_intra_matrix[64];
@ -535,6 +573,7 @@ void mpeg1_encode_mb(MpegEncContext *s,
int motion_x, int motion_y);
void ff_mpeg1_encode_init(MpegEncContext *s);
/* h263enc.c */
typedef struct RLTable {
int n; /* number of entries of table_vlc minus 1 */
@ -567,7 +606,6 @@ extern UINT8 ff_mpeg4_y_dc_scale_table[32];
extern UINT8 ff_mpeg4_c_dc_scale_table[32];
extern const INT16 ff_mpeg4_default_intra_matrix[64];
extern const INT16 ff_mpeg4_default_non_intra_matrix[64];
void h263_encode_mb(MpegEncContext *s,
DCTELEM block[6][64],
int motion_x, int motion_y);
@ -583,30 +621,32 @@ void mpeg4_pred_ac(MpegEncContext * s, INT16 *block, int n,
void ff_set_mpeg4_time(MpegEncContext * s, int picture_number);
void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
void h263_encode_init(MpegEncContext *s);
void h263_decode_init_vlc(MpegEncContext *s);
int h263_decode_picture_header(MpegEncContext *s);
int h263_decode_gob_header(MpegEncContext *s);
int ff_h263_decode_gob_header(MpegEncContext *s);
int mpeg4_decode_picture_header(MpegEncContext * s);
int intel_h263_decode_picture_header(MpegEncContext *s);
int h263_decode_mb(MpegEncContext *s,
DCTELEM block[6][64]);
int ff_h263_decode_mb(MpegEncContext *s,
DCTELEM block[6][64]);
int h263_get_picture_format(int width, int height);
int ff_mpeg4_decode_video_packet_header(MpegEncContext *s);
int ff_mpeg4_resync(MpegEncContext *s);
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
void ff_mpeg4_clean_buffers(MpegEncContext *s);
void ff_mpeg4_stuffing(PutBitContext * pbc);
void ff_mpeg4_init_partitions(MpegEncContext *s);
void ff_mpeg4_merge_partitions(MpegEncContext *s);
extern inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, UINT16 **dc_val_ptr, int *dir_ptr);
void ff_clean_mpeg4_qscales(MpegEncContext *s);
void ff_clean_h263_qscales(MpegEncContext *s);
int ff_mpeg4_decode_partitions(MpegEncContext *s);
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
int ff_h263_resync(MpegEncContext *s);
int ff_h263_get_gob_height(MpegEncContext *s);
/* rv10.c */
void rv10_encode_picture_header(MpegEncContext *s, int picture_number);
int rv_decode_dc(MpegEncContext *s, int n);
/* msmpeg4.c */
void msmpeg4_encode_picture_header(MpegEncContext * s, int picture_number);
void msmpeg4_encode_ext_header(MpegEncContext * s);
@ -615,13 +655,11 @@ void msmpeg4_encode_mb(MpegEncContext * s,
int motion_x, int motion_y);
int msmpeg4_decode_picture_header(MpegEncContext * s);
int msmpeg4_decode_ext_header(MpegEncContext * s, int buf_size);
int msmpeg4_decode_mb(MpegEncContext *s,
DCTELEM block[6][64]);
int ff_msmpeg4_decode_init(MpegEncContext *s);
void ff_msmpeg4_encode_init(MpegEncContext *s);
/* mjpegenc.c */
/* mjpegenc.c */
int mjpeg_init(MpegEncContext *s);
void mjpeg_close(MpegEncContext *s);
void mjpeg_encode_mb(MpegEncContext *s,
@ -629,6 +667,7 @@ void mjpeg_encode_mb(MpegEncContext *s,
void mjpeg_picture_header(MpegEncContext *s);
void mjpeg_picture_trailer(MpegEncContext *s);
/* rate control */
int ff_rate_control_init(MpegEncContext *s);
float ff_rate_estimate_qscale(MpegEncContext *s);

57
libavcodec/msmpeg4.c
View File

@ -61,7 +61,8 @@ static void msmpeg4v2_encode_motion(MpegEncContext * s, int val);
static void init_h263_dc_for_msmpeg4(void);
static inline void msmpeg4_memsetw(short *tab, int val, int n);
static int get_size_of_code(MpegEncContext * s, RLTable *rl, int last, int run, int level, int intra);
static int msmpeg4v12_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
static int msmpeg4v34_decode_mb(MpegEncContext *s, DCTELEM block[6][64]);
extern UINT32 inverse[256];
@ -504,26 +505,7 @@ static inline void handle_slices(MpegEncContext *s){
if (s->mb_x == 0) {
if (s->slice_height && (s->mb_y % s->slice_height) == 0) {
if(s->msmpeg4_version != 4){
int wrap;
/* reset DC pred (set previous line to 1024) */
wrap = 2 * s->mb_width + 2;
msmpeg4_memsetw(&s->dc_val[0][(1) + (2 * s->mb_y) * wrap],
1024, 2 * s->mb_width);
wrap = s->mb_width + 2;
msmpeg4_memsetw(&s->dc_val[1][(1) + (s->mb_y) * wrap],
1024, s->mb_width);
msmpeg4_memsetw(&s->dc_val[2][(1) + (s->mb_y) * wrap],
1024, s->mb_width);
/* reset AC pred (set previous line to 0) */
wrap = s->mb_width * 2 + 2;
msmpeg4_memsetw(s->ac_val[0][0] + (1 + (2 * s->mb_y) * wrap)*16,
0, 2 * s->mb_width*16);
wrap = s->mb_width + 2;
msmpeg4_memsetw(s->ac_val[1][0] + (1 + (s->mb_y) * wrap)*16,
0, s->mb_width*16);
msmpeg4_memsetw(s->ac_val[2][0] + (1 + (s->mb_y) * wrap)*16,
0, s->mb_width*16);
ff_mpeg4_clean_buffers(s);
}
s->first_slice_line = 1;
} else {
@ -710,6 +692,10 @@ static inline int msmpeg4_pred_dc(MpegEncContext * s, int n,
a = dc_val[ - 1];
b = dc_val[ - 1 - wrap];
c = dc_val[ - wrap];
if(s->first_slice_line && (n&2)==0){
b=c=1024;
}
/* XXX: the following solution consumes divisions, but it does not
necessitate to modify mpegvideo.c. The problem comes from the
@ -941,6 +927,7 @@ static inline void msmpeg4_encode_block(MpegEncContext * s, DCTELEM * block, int
for(last_index=63; last_index>=0; last_index--){
if(block[scantable[last_index]]) break;
}
s->block_last_index[n]= last_index;
}else
last_index = s->block_last_index[n];
/* AC coefs */
@ -1170,6 +1157,18 @@ int ff_msmpeg4_decode_init(MpegEncContext *s)
&table_inter_intra[0][1], 2, 1,
&table_inter_intra[0][0], 2, 1);
}
switch(s->msmpeg4_version){
case 1:
case 2:
s->decode_mb= msmpeg4v12_decode_mb;
break;
case 3:
case 4:
s->decode_mb= msmpeg4v34_decode_mb;
break;
}
return 0;
}
@ -1444,11 +1443,12 @@ static int msmpeg4v2_decode_motion(MpegEncContext * s, int pred, int f_code)
return val;
}
static int msmpeg4v12_decode_mb(MpegEncContext *s,
DCTELEM block[6][64])
static int msmpeg4v12_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
{
int cbp, code, i;
s->error_status_table[s->mb_x + s->mb_y*s->mb_width]= 0;
if (s->pict_type == P_TYPE) {
if (s->use_skip_mb_code) {
if (get_bits1(&s->gb)) {
@ -1530,8 +1530,7 @@ static int msmpeg4v12_decode_mb(MpegEncContext *s,
return 0;
}
int msmpeg4_decode_mb(MpegEncContext *s,
DCTELEM block[6][64])
static int msmpeg4v34_decode_mb(MpegEncContext *s, DCTELEM block[6][64])
{
int cbp, code, i;
UINT8 *coded_val;
@ -1542,10 +1541,8 @@ if(s->mb_x==0){
if(s->mb_y==0) printf("\n");
}
#endif
/* special slice handling */
handle_slices(s);
if(s->msmpeg4_version<=2) return msmpeg4v12_decode_mb(s, block); //FIXME export function & call from outside perhaps
s->error_status_table[s->mb_x + s->mb_y*s->mb_width]= 0;
if (s->pict_type == P_TYPE) {
set_stat(ST_INTER_MB);
@ -1866,7 +1863,7 @@ static inline int msmpeg4_decode_block(MpegEncContext * s, DCTELEM * block,
i-= 192;
if(i&(~63)){
const int left= s->gb.size*8 - get_bits_count(&s->gb);
if(((i+192 == 64 && level/qmul==-1) || s->error_resilience<0) && left>=0){
if(((i+192 == 64 && level/qmul==-1) || s->error_resilience<=1) && left>=0){
fprintf(stderr, "ignoring overflow at %d %d\n", s->mb_x, s->mb_y);
break;
}else{

32
libavcodec/rv10.c
View File

@ -365,6 +365,7 @@ static int rv10_decode_init(AVCodecContext *avctx)
s->y_dc_scale_table=
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
s->progressive_sequence=1;
/* init rv vlc */
if (!done) {
@ -393,7 +394,6 @@ static int rv10_decode_packet(AVCodecContext *avctx,
{
MpegEncContext *s = avctx->priv_data;
int i, mb_count, mb_pos, left;
DCTELEM block[6][64];
init_get_bits(&s->gb, buf, buf_size);
@ -430,47 +430,35 @@ static int rv10_decode_packet(AVCodecContext *avctx,
s->rv10_first_dc_coded[1] = 0;
s->rv10_first_dc_coded[2] = 0;
if(s->mb_y==0) s->first_slice_line=1;
s->block_wrap[0]=
s->block_wrap[1]=
s->block_wrap[2]=
s->block_wrap[3]= s->mb_width*2 + 2;
s->block_wrap[4]=
s->block_wrap[5]= s->mb_width + 2;
s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1 + s->mb_x*2;
s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1) + s->mb_x*2;
s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1 + s->mb_x*2;
s->block_index[3]= s->block_wrap[0]*(s->mb_y*2 + 2) + s->mb_x*2;
s->block_index[4]= s->block_wrap[4]*(s->mb_y + 1) + s->block_wrap[0]*(s->mb_height*2 + 2) + s->mb_x;
s->block_index[5]= s->block_wrap[4]*(s->mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2) + s->mb_x;
ff_init_block_index(s);
/* decode each macroblock */
for(i=0;i<mb_count;i++) {
s->block_index[0]+=2;
s->block_index[1]+=2;
s->block_index[2]+=2;
s->block_index[3]+=2;
s->block_index[4]++;
s->block_index[5]++;
ff_update_block_index(s);
#ifdef DEBUG
printf("**mb x=%d y=%d\n", s->mb_x, s->mb_y);
#endif
memset(block, 0, sizeof(block));
clear_blocks(s->block[0]);
s->mv_dir = MV_DIR_FORWARD;
s->mv_type = MV_TYPE_16X16;
if (h263_decode_mb(s, block) < 0) {
if (ff_h263_decode_mb(s, s->block) == SLICE_ERROR) {
fprintf(stderr, "ERROR at MB %d %d\n", s->mb_x, s->mb_y);
return -1;
}
MPV_decode_mb(s, block);
MPV_decode_mb(s, s->block);
if (++s->mb_x == s->mb_width) {
s->mb_x = 0;
s->mb_y++;
s->block_index[0]= s->block_wrap[0]*(s->mb_y*2 + 1) - 1;
s->block_index[1]= s->block_wrap[0]*(s->mb_y*2 + 1);
s->block_index[2]= s->block_wrap[0]*(s->mb_y*2 + 2) - 1;
s->block_index[3]= s->block_wrap[0]*(s->mb_y*2 + 2);
s->block_index[4]= s->block_wrap[4]*(s->mb_y + 1) + s->block_wrap[0]*(s->mb_height*2 + 2);
s->block_index[5]= s->block_wrap[4]*(s->mb_y + 1 + s->mb_height + 2) + s->block_wrap[0]*(s->mb_height*2 + 2);
ff_init_block_index(s);
s->first_slice_line=0;
}
}

2
libavcodec/utils.c
View File

@ -61,6 +61,8 @@ void avcodec_get_context_defaults(AVCodecContext *s){
s->b_quant_offset=1.25;
s->i_quant_factor=-0.8;
s->i_quant_offset=0.0;
s->error_concealment= 3;
s->workaround_bugs= FF_BUG_AUTODETECT;
}
/**