videolan/ffmpeg
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Support MBAFF + constrained intra prediction.

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(no i would not have tried to implement this had i known what mess it is)
fixes at least:
CAMACI3_Sony_C

Originally committed as revision 14687 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2008-08-11 02:21:33 +00:00
parent 697c7cd44b
commit d1d10e9125
3 changed files with 62 additions and 5 deletions
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33
libavcodec/h264.c
View File

@ -217,8 +217,27 @@ static void fill_caches(H264Context *h, int mb_type, int for_deblock){
h->top_samples_available= 0x33FF;
h->topright_samples_available= 0x26EA;
}
for(i=0; i<2; i++){
if(!IS_INTRA(left_type[i]) && (left_type[i]==0 || h->pps.constrained_intra_pred)){
if(IS_INTERLACED(mb_type) != IS_INTERLACED(left_type[0])){
if(IS_INTERLACED(mb_type)){
if(!IS_INTRA(left_type[0]) && (left_type[0]==0 || h->pps.constrained_intra_pred)){
h->topleft_samples_available&= 0xDFFF;
h->left_samples_available&= 0x5FFF;
}
if(!IS_INTRA(left_type[1]) && (left_type[1]==0 || h->pps.constrained_intra_pred)){
h->topleft_samples_available&= 0xFF5F;
h->left_samples_available&= 0xFF5F;
}
}else{
int left_typei = h->slice_table[left_xy[0] + s->mb_stride ] == h->slice_num
? s->current_picture.mb_type[left_xy[0] + s->mb_stride] : 0;
assert(left_xy[0] == left_xy[1]);
if(!(IS_INTRA(left_typei) && IS_INTRA(left_type[0])) && (left_typei==0 || h->pps.constrained_intra_pred)){
h->topleft_samples_available&= 0xDF5F;
h->left_samples_available&= 0x5F5F;
}
}
}else{
if(!IS_INTRA(left_type[0]) && (left_type[0]==0 || h->pps.constrained_intra_pred)){
h->topleft_samples_available&= 0xDF5F;
h->left_samples_available&= 0x5F5F;
}
@ -565,8 +584,10 @@ static inline int check_intra4x4_pred_mode(H264Context *h){
}
}
if(!(h->left_samples_available&0x8000)){
if((h->left_samples_available&0x8888)!=0x8888){
static const int mask[4]={0x8000,0x2000,0x80,0x20};
for(i=0; i<4; i++){
if(!(h->left_samples_available&mask[i])){
int status= left[ h->intra4x4_pred_mode_cache[scan8[0] + 8*i] ];
if(status<0){
av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra4x4 mode %d at %d %d\n", status, s->mb_x, s->mb_y);
@ -574,6 +595,7 @@ static inline int check_intra4x4_pred_mode(H264Context *h){
} else if(status){
h->intra4x4_pred_mode_cache[scan8[0] + 8*i]= status;
}
}
}
}
@ -601,8 +623,11 @@ static inline int check_intra_pred_mode(H264Context *h, int mode){
}
}
if(!(h->left_samples_available&0x8000)){
if((h->left_samples_available&0x8080) != 0x8080){
mode= left[ mode ];
if(h->left_samples_available&0x8080){ //mad cow disease mode, aka MBAFF + constrained_intra_pred
mode= ALZHEIMER_DC_L0T_PRED8x8 + (!(h->left_samples_available&0x8000)) + 2*(mode == DC_128_PRED8x8);
}
if(mode<0){
av_log(h->s.avctx, AV_LOG_ERROR, "left block unavailable for requested intra mode at %d %d\n", s->mb_x, s->mb_y);
return -1;

27
libavcodec/h264pred.c
View File

@ -690,6 +690,29 @@ static void pred8x8_dc_c(uint8_t *src, int stride){
}
}
//the following 4 function should not be optimized!
static void pred8x8_mad_cow_dc_l0t(uint8_t *src, int stride){
pred8x8_top_dc_c(src, stride);
pred4x4_dc_c(src, NULL, stride);
}
static void pred8x8_mad_cow_dc_0lt(uint8_t *src, int stride){
pred8x8_dc_c(src, stride);
pred4x4_top_dc_c(src, NULL, stride);
}
static void pred8x8_mad_cow_dc_l00(uint8_t *src, int stride){
pred8x8_left_dc_c(src, stride);
pred4x4_128_dc_c(src + 4*stride , NULL, stride);
pred4x4_128_dc_c(src + 4*stride + 4, NULL, stride);
}
static void pred8x8_mad_cow_dc_0l0(uint8_t *src, int stride){
pred8x8_left_dc_c(src, stride);
pred4x4_128_dc_c(src , NULL, stride);
pred4x4_128_dc_c(src + 4, NULL, stride);
}
static void pred8x8_dc_rv40_c(uint8_t *src, int stride){
int i;
int dc0=0;
@ -1046,6 +1069,10 @@ void ff_h264_pred_init(H264PredContext *h, int codec_id){
h->pred8x8[DC_PRED8x8 ]= pred8x8_dc_c;
h->pred8x8[LEFT_DC_PRED8x8]= pred8x8_left_dc_c;
h->pred8x8[TOP_DC_PRED8x8 ]= pred8x8_top_dc_c;
h->pred8x8[ALZHEIMER_DC_L0T_PRED8x8 ]= pred8x8_mad_cow_dc_l0t;
h->pred8x8[ALZHEIMER_DC_0LT_PRED8x8 ]= pred8x8_mad_cow_dc_0lt;
h->pred8x8[ALZHEIMER_DC_L00_PRED8x8 ]= pred8x8_mad_cow_dc_l00;
h->pred8x8[ALZHEIMER_DC_0L0_PRED8x8 ]= pred8x8_mad_cow_dc_0l0;
}else{
h->pred8x8[DC_PRED8x8 ]= pred8x8_dc_rv40_c;
h->pred8x8[LEFT_DC_PRED8x8]= pred8x8_left_dc_rv40_c;

7
libavcodec/h264pred.h
View File

@ -60,6 +60,11 @@
#define LEFT_DC_PRED8x8 4
#define TOP_DC_PRED8x8 5
#define DC_128_PRED8x8 6
#define ALZHEIMER_DC_L0T_PRED8x8 7
#define ALZHEIMER_DC_0LT_PRED8x8 8
#define ALZHEIMER_DC_L00_PRED8x8 9
#define ALZHEIMER_DC_0L0_PRED8x8 10
//@}
/**
@ -68,7 +73,7 @@
typedef struct H264PredContext{
void (*pred4x4 [9+3+3])(uint8_t *src, uint8_t *topright, int stride);//FIXME move to dsp?
void (*pred8x8l [9+3])(uint8_t *src, int topleft, int topright, int stride);
void (*pred8x8 [4+3])(uint8_t *src, int stride);
void (*pred8x8 [4+3+4])(uint8_t *src, int stride);
void (*pred16x16[4+3])(uint8_t *src, int stride);
}H264PredContext;