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motion estimation for SVQ1

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Originally committed as revision 3126 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer
2004-05-12 02:03:24 +00:00
parent caa50878f4
commit 5e13a73006
4 changed files with 201 additions and 86 deletions
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217
libavcodec/svq1.c
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@ -48,6 +48,8 @@
#undef NDEBUG
#include <assert.h>
extern const uint8_t mvtab[33][2];
static VLC svq1_block_type;
static VLC svq1_motion_component;
static VLC svq1_intra_multistage[6];
@ -55,15 +57,13 @@ static VLC svq1_inter_multistage[6];
static VLC svq1_intra_mean;
static VLC svq1_inter_mean;
#define MEDIAN(a,b,c) (((a < b) != (b >= c)) ? b : (((a < c) != (c > b)) ? c : a))
#define SVQ1_BLOCK_SKIP 0
#define SVQ1_BLOCK_INTER 1
#define SVQ1_BLOCK_INTER_4V 2
#define SVQ1_BLOCK_INTRA 3
typedef struct SVQ1Context {
MpegEncContext m; // needed for motion estimation, should not be used for anything else, the idea is to make the motion estimation eventually independant of MpegEncContext, so this will be removed then (FIXME/XXX)
AVCodecContext *avctx;
DSPContext dsp;
AVFrame picture;
@ -86,6 +86,11 @@ typedef struct SVQ1Context {
int c_block_height;
unsigned char *c_plane;
uint16_t *mb_type;
uint32_t *dummy;
int16_t (*motion_val8[3])[2];
int16_t (*motion_val16[3])[2];
int64_t rd_total;
} SVQ1Context;
@ -349,13 +354,18 @@ static int svq1_decode_motion_vector (GetBitContext *bitbuf, svq1_pmv_t *mv, svq
for (i=0; i < 2; i++) {
/* get motion code */
diff = get_vlc2(bitbuf, svq1_motion_component.table, 7, 2) - 32;
diff = get_vlc2(bitbuf, svq1_motion_component.table, 7, 2);
if(diff<0)
return -1;
else if(diff){
if(get_bits1(bitbuf)) diff= -diff;
}
/* add median of motion vector predictors and clip result */
if (i == 1)
mv->y = ((diff + MEDIAN(pmv[0]->y, pmv[1]->y, pmv[2]->y)) << 26) >> 26;
mv->y = ((diff + mid_pred(pmv[0]->y, pmv[1]->y, pmv[2]->y)) << 26) >> 26;
else
mv->x = ((diff + MEDIAN(pmv[0]->x, pmv[1]->x, pmv[2]->x)) << 26) >> 26;
mv->x = ((diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x)) << 26) >> 26;
}
return 0;
@ -834,9 +844,9 @@ static int svq1_decode_init(AVCodecContext *avctx)
&svq1_block_type_vlc[0][1], 2, 1,
&svq1_block_type_vlc[0][0], 2, 1);
init_vlc(&svq1_motion_component, 7, 65,
&svq1_motion_component_vlc[0][1], 2, 1,
&svq1_motion_component_vlc[0][0], 2, 1);
init_vlc(&svq1_motion_component, 7, 33,
&mvtab[0][1], 2, 1,
&mvtab[0][0], 2, 1);
for (i = 0; i < 6; i++) {
init_vlc(&svq1_intra_multistage[i], 3, 8,
@ -1461,7 +1471,7 @@ static int encode_block(SVQ1Context *s, uint8_t *src, uint8_t *ref, uint8_t *dec
return best_score;
}
static void svq1_encode_plane(SVQ1Context *s, unsigned char *src_plane, unsigned char *ref_plane, unsigned char *decoded_plane,
static void svq1_encode_plane(SVQ1Context *s, int plane, unsigned char *src_plane, unsigned char *ref_plane, unsigned char *decoded_plane,
int width, int height, int src_stride, int stride)
{
unsigned char buffer0[256];
@ -1493,6 +1503,75 @@ av_log(s->avctx, AV_LOG_INFO, "********* frame #%d\n", frame++);
block_width = (width + 15) / 16;
block_height = (height + 15) / 16;
if(s->picture.pict_type == P_TYPE){
s->m.avctx= s->avctx;
s->m.current_picture_ptr= &s->m.current_picture;
s->m.last_picture_ptr = &s->m.last_picture;
s->m.last_picture.data[0]= ref_plane;
s->m.linesize=
s->m.last_picture.linesize[0]=
s->m.new_picture.linesize[0]=
s->m.current_picture.linesize[0]= stride;
s->m.width= width;
s->m.height= height;
s->m.mb_width= block_width;
s->m.mb_height= block_height;
s->m.mb_stride= s->m.mb_width+1;
s->m.b8_stride= 2*s->m.mb_width+1;
s->m.f_code=1;
s->m.pict_type= s->picture.pict_type;
s->m.qscale= s->picture.quality/FF_QP2LAMBDA;
s->m.me_method= s->avctx->me_method;
if(!s->motion_val8[plane]){
s->motion_val8 [plane]= av_mallocz(s->m.b8_stride*block_height*2*2*sizeof(int16_t));
s->motion_val16[plane]= av_mallocz(s->m.mb_stride*block_height*2*sizeof(int16_t));
}
s->m.mb_type= s->mb_type;
//dummies, to avoid segfaults
s->m.current_picture.mb_mean= s->dummy;
s->m.current_picture.mb_var= s->dummy;
s->m.current_picture.mc_mb_var= s->dummy;
s->m.current_picture.mb_type= s->dummy;
s->m.current_picture.motion_val[0]= s->motion_val8[plane];
s->m.p_mv_table= s->motion_val16[plane];
s->m.dsp= s->dsp; //move
ff_init_me(&s->m);
s->m.me.dia_size= s->avctx->dia_size;
s->m.first_slice_line=1;
for (y = 0; y < block_height; y++) {
uint8_t src[stride*16];
s->m.new_picture.data[0]= src - y*16*stride; //ugly
s->m.mb_y= y;
for(i=0; i<16 && i + 16*y<height; i++){
memcpy(&src[i*stride], &src_plane[(i+16*y)*src_stride], width);
for(x=width; x<16*block_width; x++)
src[i*stride+x]= src[i*stride+x-1];
}
for(; i<16 && i + 16*y<16*block_height; i++)
memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
for (x = 0; x < block_width; x++) {
s->m.mb_x= x;
ff_init_block_index(&s->m);
ff_update_block_index(&s->m);
ff_estimate_p_frame_motion(&s->m, x, y);
}
s->m.first_slice_line=0;
}
ff_fix_long_p_mvs(&s->m);
ff_fix_long_mvs(&s->m, NULL, 0, s->m.p_mv_table, s->m.f_code, CANDIDATE_MB_TYPE_INTER, 0);
}
s->m.first_slice_line=1;
for (y = 0; y < block_height; y++) {
uint8_t src[stride*16];
@ -1504,53 +1583,91 @@ av_log(s->avctx, AV_LOG_INFO, "********* frame #%d\n", frame++);
for(; i<16 && i + 16*y<16*block_height; i++)
memcpy(&src[i*stride], &src[(i-1)*stride], 16*block_width);
s->m.mb_y= y;
for (x = 0; x < block_width; x++) {
uint8_t reorder_buffer[2][6][7*32];
int count[2][6];
uint8_t reorder_buffer[3][6][7*32];
int count[3][6];
int offset = y * 16 * stride + x * 16;
uint8_t *decoded= decoded_plane + offset;
uint8_t *ref= ref_plane + offset;
int score[2]={0,0}, best;
int score[4]={0,0,0,0}, best;
uint8_t temp[16*stride];
s->m.mb_x= x;
ff_init_block_index(&s->m);
ff_update_block_index(&s->m);
#ifdef DEBUG_SVQ1
av_log(s->avctx, AV_LOG_INFO, "* level 5 vector @ %d, %d:\n", x * 16, y * 16);
#endif
for(i=0; i<6; i++){
init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i], 7*32);
}
if(s->picture.pict_type == P_TYPE){
const uint8_t *vlc= svq1_block_type_vlc[SVQ1_BLOCK_INTRA];
put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
score[0]= vlc[1]*lambda;
}
score[0]+= encode_block(s, src+16*x, ref, temp, stride, 5, 64, lambda, 1);
for(i=0; i<6; i++){
count[0][i]= put_bits_count(&s->reorder_pb[i]);
flush_put_bits(&s->reorder_pb[i]);
init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i], 7*32);
}
if(s->picture.pict_type == I_TYPE || (s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTRA)){
for(i=0; i<6; i++){
init_put_bits(&s->reorder_pb[i], reorder_buffer[0][i], 7*32);
}
if(s->picture.pict_type == P_TYPE){
const uint8_t *vlc= svq1_block_type_vlc[SVQ1_BLOCK_INTRA];
put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
score[0]= vlc[1]*lambda;
}
score[0]+= encode_block(s, src+16*x, NULL, temp, stride, 5, 64, lambda, 1);
for(i=0; i<6; i++){
count[0][i]= put_bits_count(&s->reorder_pb[i]);
flush_put_bits(&s->reorder_pb[i]);
}
}else
score[0]= INT_MAX;
best=0;
if(s->picture.pict_type == P_TYPE){
const uint8_t *vlc= svq1_block_type_vlc[SVQ1_BLOCK_INTER];
put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
score[1] = vlc[1]*lambda;
for(i=0; i<2; i++){
vlc= svq1_motion_component_vlc[32];
put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
score[1] += vlc[1]*lambda;
}
int mx, my, pred_x, pred_y, dxy;
int16_t *motion_ptr;
score[1]+= encode_block(s, src+16*x, ref, decoded, stride, 5, 64, lambda, 0);
best= score[1] <= score[0];
motion_ptr= h263_pred_motion(&s->m, 0, 0, &pred_x, &pred_y);
if(s->m.mb_type[x + y*s->m.mb_stride]&CANDIDATE_MB_TYPE_INTER){
for(i=0; i<6; i++)
init_put_bits(&s->reorder_pb[i], reorder_buffer[1][i], 7*32);
put_bits(&s->reorder_pb[5], vlc[1], vlc[0]);
s->m.pb= s->reorder_pb[5];
mx= motion_ptr[0];
my= motion_ptr[1];
assert(mx>=-32 && mx<=31);
assert(my>=-32 && my<=31);
assert(pred_x>=-32 && pred_x<=31);
assert(pred_y>=-32 && pred_y<=31);
ff_h263_encode_motion(&s->m, mx - pred_x, 1);
ff_h263_encode_motion(&s->m, my - pred_y, 1);
s->reorder_pb[5]= s->m.pb;
score[1] += lambda*put_bits_count(&s->reorder_pb[5]);
dxy= (mx&1) + 2*(my&1);
s->dsp.put_pixels_tab[0][dxy](temp+16, ref + (mx>>1) + stride*(my>>1), stride, 16);
score[1]+= encode_block(s, src+16*x, temp+16, decoded, stride, 5, 64, lambda, 0);
best= score[1] <= score[0];
}
#if 0
if(skiped_score <= score[best]){
best=3;
...
}
#endif
if(best==1){
for(i=0; i<6; i++){
count[1][i]= put_bits_count(&s->reorder_pb[i]);
flush_put_bits(&s->reorder_pb[i]);
}
}else{
motion_ptr[0 ] = motion_ptr[1 ]=
motion_ptr[2 ] = motion_ptr[3 ]=
motion_ptr[0+2*s->m.b8_stride] = motion_ptr[1+2*s->m.b8_stride]=
motion_ptr[2+2*s->m.b8_stride] = motion_ptr[3+2*s->m.b8_stride]=0;
}
}else
best= 0;
}
s->rd_total += score[best];
@ -1636,6 +1753,7 @@ av_log(s->avctx, AV_LOG_INFO, " split to level %d\n", level - 1);
}
#endif
}
s->m.first_slice_line=0;
}
}
@ -1691,6 +1809,14 @@ static int svq1_encode_init(AVCodecContext *avctx)
s->c_block_width = (s->frame_width / 4 + 15) / 16;
s->c_block_height = (s->frame_height / 4 + 15) / 16;
s->avctx= avctx;
s->m.me.scratchpad= av_mallocz((avctx->width+64)*2*16*2*sizeof(uint8_t));
s->m.me.map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
s->m.me.score_map = av_mallocz(ME_MAP_SIZE*sizeof(uint32_t));
s->mb_type = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int16_t));
s->dummy = av_mallocz((s->y_block_width+1)*s->y_block_height*sizeof(int32_t));
h263_encode_init(&s->m); //mv_penalty
av_log(s->avctx, AV_LOG_INFO, " Hey: %d x %d, %d x %d, %d x %d\n",
s->frame_width, s->frame_height,
s->y_block_width, s->y_block_height,
@ -1746,7 +1872,7 @@ static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
svq1_write_header(s, p->pict_type);
for(i=0; i<3; i++){
svq1_encode_plane(s,
svq1_encode_plane(s, i,
s->picture.data[i], s->last_picture.data[i], s->current_picture.data[i],
s->frame_width / (i?4:1), s->frame_height / (i?4:1),
s->picture.linesize[i], s->current_picture.linesize[i]);
@ -1764,10 +1890,21 @@ static int svq1_encode_frame(AVCodecContext *avctx, unsigned char *buf,
static int svq1_encode_end(AVCodecContext *avctx)
{
SVQ1Context * const s = avctx->priv_data;
int i;
av_log(avctx, AV_LOG_DEBUG, "RD: %f\n", s->rd_total/(double)(avctx->width*avctx->height*avctx->frame_number));
av_free(s->c_plane);
av_freep(&s->c_plane);
av_freep(&s->m.me.scratchpad);
av_freep(&s->m.me.map);
av_freep(&s->m.me.score_map);
av_freep(&s->mb_type);
av_freep(&s->dummy);
for(i=0; i<3; i++){
av_freep(&s->motion_val8[i]);
av_freep(&s->motion_val16[i]);
}
return 0;
}