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multiple reference frames support 

Originally committed as revision 1734 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2003-04-04 20:59:50 +00:00
parent 365d19ec78
commit 1924f3ce36
2 changed files with 66 additions and 56 deletions
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6
libavcodec/golomb.h
View File

@ -66,7 +66,7 @@ static inline int get_te0_golomb(GetBitContext *gb, int range){
assert(range >= 1);
if(range==1) return 0;
else if(range==2) return get_bits1(gb);
else if(range==2) return get_bits1(gb)^1;
else return get_ue_golomb(gb);
}
@ -76,7 +76,7 @@ static inline int get_te0_golomb(GetBitContext *gb, int range){
static inline int get_te_golomb(GetBitContext *gb, int range){
assert(range >= 1);
if(range==2) return get_bits1(gb);
if(range==2) return get_bits1(gb)^1;
else return get_ue_golomb(gb);
}
@ -193,7 +193,7 @@ static inline void set_te_golomb(PutBitContext *pb, int i, int range){
assert(range >= 1);
assert(i<=range);
if(range==2) put_bits(pb, 1, i);
if(range==2) put_bits(pb, 1, i^1);
else set_ue_golomb(pb, i);
}

116
libavcodec/h264.c
View File

@ -733,6 +733,21 @@ static inline int pred_non_zero_count(H264Context *h, int n){
return i&31;
}
static inline int fetch_diagonal_mv(H264Context *h, const int16_t **C, int i, int list, int part_width){
const int topright_ref= h->ref_cache[list][ i - 8 + part_width ];
if(topright_ref != PART_NOT_AVAILABLE){
*C= h->mv_cache[list][ i - 8 + part_width ];
return topright_ref;
}else{
#ifdef TRACE
printf("topright MV not available\n");
#endif
*C= h->mv_cache[list][ i - 8 - 1 ];
return h->ref_cache[list][ i - 8 - 1 ];
}
}
/**
* gets the predicted MV.
* @param n the block index
@ -744,14 +759,14 @@ static inline void pred_motion(H264Context * const h, int n, int part_width, int
MpegEncContext * const s = &h->s;
const int index8= scan8[n];
const int top_ref= h->ref_cache[list][ index8 - 8 ];
const int topright_ref= h->ref_cache[list][ index8 - 8 + part_width ];
const int left_ref= h->ref_cache[list][ index8 - 1 ];
const int16_t * const A= h->mv_cache[list][ index8 - 1 ];
const int16_t * const B= h->mv_cache[list][ index8 - 8 ];
const int16_t * const C= h->mv_cache[list][ index8 - 8 + part_width ];
const int16_t * C;
int diagonal_ref, match_count;
assert(part_width==1 || part_width==2 || part_width==4);
/* mv_cache
B . . A T T T T
U . . L . . , .
@ -759,36 +774,36 @@ static inline void pred_motion(H264Context * const h, int n, int part_width, int
U . . L . . , .
. . . L . . . .
*/
if(topright_ref != PART_NOT_AVAILABLE){
if((topright_ref==ref) + (top_ref==ref) + (left_ref==ref) == 1){
*mx= A[0] + B[0] + C[0];
*my= A[1] + B[1] + C[1];
diagonal_ref= fetch_diagonal_mv(h, &C, index8, list, part_width);
match_count= (diagonal_ref==ref) + (top_ref==ref) + (left_ref==ref);
if(match_count > 1){ //most common
*mx= mid_pred(A[0], B[0], C[0]);
*my= mid_pred(A[1], B[1], C[1]);
}else if(match_count==1){
if(left_ref==ref){
*mx= A[0];
*my= A[1];
}else if(top_ref==ref){
*mx= B[0];
*my= B[1];
}else{
*mx= C[0];
*my= C[1];
}
}else{
if(top_ref == PART_NOT_AVAILABLE && diagonal_ref == PART_NOT_AVAILABLE && left_ref != PART_NOT_AVAILABLE){
*mx= A[0];
*my= A[1];
}else{
*mx= mid_pred(A[0], B[0], C[0]);
*my= mid_pred(A[1], B[1], C[1]);
}
}else{
const int topleft_ref= h->ref_cache[list][ index8 - 9 ];
const int16_t * const D= h->mv_cache[list][ index8 - 9 ];
if(top_ref == PART_NOT_AVAILABLE && left_ref != PART_NOT_AVAILABLE){ //FIXME check rare FMO case where std isnt clear
*mx= A[0];
*my= A[1];
}else{
if((topleft_ref==ref) + (top_ref==ref) + (left_ref==ref) == 1){
*mx= A[0] + B[0] + D[0];
*my= A[1] + B[1] + D[1];
}else{
*mx= mid_pred(A[0], B[0], D[0]);
*my= mid_pred(A[1], B[1], D[1]);
}
}
}
#ifdef TRACE
printf("topleft: %2d %2d %2d ", topleft_ref, D[0], D[1]);
#endif
}
#ifdef TRACE
printf("pred_motion (%2d %2d %2d) (%2d %2d %2d) (%2d %2d %2d) -> (%2d %2d %2d) at %2d %2d %d list %d\n", top_ref, B[0], B[1], topright_ref, C[0], C[1], left_ref, A[0], A[1], ref, *mx, *my, s->mb_x, s->mb_y, n, list);
printf("pred_motion (%2d %2d %2d) (%2d %2d %2d) (%2d %2d %2d) -> (%2d %2d %2d) at %2d %2d %d list %d\n", top_ref, B[0], B[1], diagonal_ref, C[0], C[1], left_ref, A[0], A[1], ref, *mx, *my, s->mb_x, s->mb_y, n, list);
#endif
}
@ -854,32 +869,20 @@ printf("pred_8x16: (%2d %2d %2d) at %2d %2d %d list %d", left_ref, A[0], A[1], s
return;
}
}else{
const int topright_ref= h->ref_cache[list][ scan8[4] - 8 + 2 ];
const int16_t * const C= h->mv_cache[list][ scan8[4] - 8 + 2 ];
const int16_t * C;
int diagonal_ref;
diagonal_ref= fetch_diagonal_mv(h, &C, scan8[4], list, 2);
#ifdef TRACE
printf("pred_8x16: (%2d %2d %2d) at %2d %2d %d list %d", topright_ref, C[0], C[1], s->mb_x, s->mb_y, n, list);
printf("pred_8x16: (%2d %2d %2d) at %2d %2d %d list %d", diagonal_ref, C[0], C[1], s->mb_x, s->mb_y, n, list);
#endif
if(topright_ref == ref){
if(diagonal_ref == ref){
*mx= C[0];
*my= C[1];
return;
}
if(topright_ref == PART_NOT_AVAILABLE){ //insanity ...
const int topleft_ref= h->ref_cache[list][ scan8[4] - 9 ];
const int16_t * const D= h->mv_cache[list][ scan8[4] - 9 ];
#ifdef TRACE
printf("pred_8x16: insanity (%2d %2d %2d) at %2d %2d %d list %d", topleft_ref, D[0], D[1], s->mb_x, s->mb_y, n, list);
#endif
if(topleft_ref == ref){
*mx= D[0];
*my= D[1];
return;
}
}
}
//RARE
@ -1947,7 +1950,7 @@ static inline void mc_part(H264Context *h, int n, int square, int chroma_height,
y_offset += 8*s->mb_y;
if(list0){
Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[0] ] ];
Picture *ref= &h->ref_list[0][ h->ref_cache[0][ scan8[n] ] ];
mc_dir_part(h, ref, n, square, chroma_height, delta, 0,
dest_y, dest_cb, dest_cr, x_offset, y_offset,
qpix_op, chroma_op);
@ -1957,7 +1960,7 @@ static inline void mc_part(H264Context *h, int n, int square, int chroma_height,
}
if(list1){
Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[0] ] ];
Picture *ref= &h->ref_list[1][ h->ref_cache[1][ scan8[n] ] ];
mc_dir_part(h, ref, n, square, chroma_height, delta, 1,
dest_y, dest_cb, dest_cr, x_offset, y_offset,
qpix_op, chroma_op);
@ -2539,16 +2542,21 @@ static void idr(H264Context *h){
h->short_ref_count=0;
}
//static void
/**
*
* @return the removed picture or NULL if an error occures
*/
static Picture * remove_short(H264Context *h, int frame_num){
MpegEncContext * const s = &h->s;
int i;
if(s->avctx->debug&FF_DEBUG_MMCO)
printf("remove short %d count %d\n", frame_num, h->short_ref_count);
for(i=0; i<h->short_ref_count; i++){
Picture *pic= h->short_ref[i];
if(s->avctx->debug&FF_DEBUG_MMCO)
printf("%d %d %X\n", i, pic->frame_num, (int)pic);
if(pic->frame_num == frame_num){
h->short_ref[i]= NULL;
memmove(&h->short_ref[i], &h->short_ref[i+1], (h->short_ref_count - i - 1)*sizeof(Picture*));
@ -2653,8 +2661,9 @@ static int execute_ref_pic_marking(H264Context *h, MMCO *mmco, int mmco_count){
}
if(h->short_ref_count)
memmove(&h->short_ref[1], &h->short_ref[0], (h->short_ref_count - 1)*sizeof(Picture*));
h->short_ref[0]= s->current_picture_ptr;
memmove(&h->short_ref[1], &h->short_ref[0], h->short_ref_count*sizeof(Picture*));
h->short_ref[0]= s->current_picture_ptr;
h->short_ref[0]->long_ref=0;
h->short_ref_count++;
}
@ -2884,6 +2893,7 @@ static int decode_slice_header(H264Context *h){
frame_start(h);
}
s->current_picture_ptr->frame_num= //FIXME frame_num cleanup
h->frame_num= get_bits(&s->gb, h->sps.log2_max_frame_num);
if(h->sps.frame_mbs_only_flag){
@ -3176,7 +3186,7 @@ printf("level: %d suffix_length:%d\n", level[i], suffix_length);
static int decode_mb(H264Context *h){
MpegEncContext * const s = &h->s;
const int mb_xy= s->mb_x + s->mb_y*h->mb_stride;
int mb_type, /*ref0,*/ partition_count, cbp;
int mb_type, partition_count, cbp;
memset(h->mb, 0, sizeof(int16_t)*24*16); //FIXME avoid if allready clear (move after skip handlong?
@ -4096,7 +4106,7 @@ static int decode_nal_units(H264Context *h, uint8_t *buf, int buf_size){
if(s->current_picture_ptr->reference)
execute_ref_pic_marking(h, h->mmco, h->mmco_index);
else
assert(h->mmco_index=0);
assert(h->mmco_index==0);
ff_er_frame_end(s);
MPV_frame_end(s);