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FFmpeg/libavcodec/h264_hl_motion.c

165 lines
6.4 KiB
C
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#include "h264.h"
#include "thread.h"
static inline int get_lowest_part_list_y(H264Context *h, Picture *pic, int n, int height,
int y_offset, int list){
int raw_my= h->mv_cache[list][ scan8[n] ][1];
int filter_height= (raw_my&3) ? 2 : 0;
int full_my= (raw_my>>2) + y_offset;
int top = full_my - filter_height, bottom = full_my + height + filter_height;
return FFMAX(abs(top), bottom);
}
static inline void get_lowest_part_y(H264Context *h, int refs[2][48], int n, int height,
int y_offset, int list0, int list1, int *nrefs){
MpegEncContext * const s = &h->s;
int my;
y_offset += 16*(s->mb_y >> MB_FIELD);
if(list0){
int ref_n = h->ref_cache[0][ scan8[n] ];
Picture *ref= &h->ref_list[0][ref_n];
// Error resilience puts the current picture in the ref list.
// Don't try to wait on these as it will cause a deadlock.
// Fields can wait on each other, though.
if(ref->thread_opaque != s->current_picture.thread_opaque ||
(ref->reference&3) != s->picture_structure) {
my = get_lowest_part_list_y(h, ref, n, height, y_offset, 0);
if (refs[0][ref_n] < 0) nrefs[0] += 1;
refs[0][ref_n] = FFMAX(refs[0][ref_n], my);
}
}
if(list1){
int ref_n = h->ref_cache[1][ scan8[n] ];
Picture *ref= &h->ref_list[1][ref_n];
if(ref->thread_opaque != s->current_picture.thread_opaque ||
(ref->reference&3) != s->picture_structure) {
my = get_lowest_part_list_y(h, ref, n, height, y_offset, 1);
if (refs[1][ref_n] < 0) nrefs[1] += 1;
refs[1][ref_n] = FFMAX(refs[1][ref_n], my);
}
}
}
/**
* Wait until all reference frames are available for MC operations.
*
* @param h the H264 context
*/
static void await_references(H264Context *h){
MpegEncContext * const s = &h->s;
const int mb_xy= h->mb_xy;
const int mb_type= s->current_picture.mb_type[mb_xy];
int refs[2][48];
int nrefs[2] = {0};
int ref, list;
memset(refs, -1, sizeof(refs));
if(IS_16X16(mb_type)){
get_lowest_part_y(h, refs, 0, 16, 0,
IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
}else if(IS_16X8(mb_type)){
get_lowest_part_y(h, refs, 0, 8, 0,
IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
get_lowest_part_y(h, refs, 8, 8, 8,
IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
}else if(IS_8X16(mb_type)){
get_lowest_part_y(h, refs, 0, 16, 0,
IS_DIR(mb_type, 0, 0), IS_DIR(mb_type, 0, 1), nrefs);
get_lowest_part_y(h, refs, 4, 16, 0,
IS_DIR(mb_type, 1, 0), IS_DIR(mb_type, 1, 1), nrefs);
}else{
int i;
assert(IS_8X8(mb_type));
for(i=0; i<4; i++){
const int sub_mb_type= h->sub_mb_type[i];
const int n= 4*i;
int y_offset= (i&2)<<2;
if(IS_SUB_8X8(sub_mb_type)){
get_lowest_part_y(h, refs, n , 8, y_offset,
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
}else if(IS_SUB_8X4(sub_mb_type)){
get_lowest_part_y(h, refs, n , 4, y_offset,
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
get_lowest_part_y(h, refs, n+2, 4, y_offset+4,
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
}else if(IS_SUB_4X8(sub_mb_type)){
get_lowest_part_y(h, refs, n , 8, y_offset,
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
get_lowest_part_y(h, refs, n+1, 8, y_offset,
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
}else{
int j;
assert(IS_SUB_4X4(sub_mb_type));
for(j=0; j<4; j++){
int sub_y_offset= y_offset + 2*(j&2);
get_lowest_part_y(h, refs, n+j, 4, sub_y_offset,
IS_DIR(sub_mb_type, 0, 0), IS_DIR(sub_mb_type, 0, 1), nrefs);
}
}
}
}
for(list=h->list_count-1; list>=0; list--){
for(ref=0; ref<48 && nrefs[list]; ref++){
int row = refs[list][ref];
if(row >= 0){
Picture *ref_pic = &h->ref_list[list][ref];
int ref_field = ref_pic->reference - 1;
int ref_field_picture = ref_pic->field_picture;
int pic_height = 16*s->mb_height >> ref_field_picture;
row <<= MB_MBAFF;
nrefs[list]--;
if(!FIELD_PICTURE && ref_field_picture){ // frame referencing two fields
ff_thread_await_progress((AVFrame*)ref_pic, FFMIN((row >> 1) - !(row&1), pic_height-1), 1);
ff_thread_await_progress((AVFrame*)ref_pic, FFMIN((row >> 1) , pic_height-1), 0);
}else if(FIELD_PICTURE && !ref_field_picture){ // field referencing one field of a frame
ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row*2 + ref_field , pic_height-1), 0);
}else if(FIELD_PICTURE){
ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row, pic_height-1), ref_field);
}else{
ff_thread_await_progress((AVFrame*)ref_pic, FFMIN(row, pic_height-1), 0);
}
}
}
}
}
#define FUNC(a) a ## _8
#define PIXEL_SHIFT 0
#include "h264_hl_motion.h"
#undef PIXEL_SHIFT
#undef FUNC
#define FUNC(a) a ## _16
#define PIXEL_SHIFT 1
#include "h264_hl_motion.h"
void ff_hl_motion(H264Context *h, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
qpel_mc_func (*qpix_put)[16], h264_chroma_mc_func (*chroma_put),
qpel_mc_func (*qpix_avg)[16], h264_chroma_mc_func (*chroma_avg),
h264_weight_func *weight_op, h264_biweight_func *weight_avg){
if(h->pixel_shift){
hl_motion_16(h, dest_y, dest_cb, dest_cr,
qpix_put, chroma_put,
qpix_avg, chroma_avg,
weight_op, weight_avg);
}else
hl_motion_8(h, dest_y, dest_cb, dest_cr,
qpix_put, chroma_put,
qpix_avg, chroma_avg,
weight_op, weight_avg);
}