ffmpeg/FFmpeg
1
0
Fork 0
mirror of https://git.ffmpeg.org/ffmpeg.git synced 2024-09-21 05:46:55 +00:00
Code Issues Packages Projects Releases Wiki Activity

lowres 4mv

Browse Source 
Originally committed as revision 3576 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-10-09 12:02:19 +00:00
parent 61846e9ac3
commit ac8b03c0a8
1 changed files with 100 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

109
libavcodec/mpegvideo.c
View File

@ -2498,6 +2498,48 @@ static inline int hpel_motion(MpegEncContext *s,
return emu;
}
static inline int hpel_motion_lowres(MpegEncContext *s,
uint8_t *dest, uint8_t *src,
int field_based, int field_select,
int src_x, int src_y,
int width, int height, int stride,
int h_edge_pos, int v_edge_pos,
int w, int h, h264_chroma_mc_func *pix_op,
int motion_x, int motion_y)
{
const int lowres= s->avctx->lowres;
const int s_mask= (2<<lowres)-1;
int emu=0;
int sx, sy;
if(s->quarter_sample){
motion_x/=2;
motion_y/=2;
}
sx= motion_x & s_mask;
sy= motion_y & s_mask;
src_x += motion_x >> (lowres+1);
src_y += motion_y >> (lowres+1);
src += src_y * stride + src_x;
if( (unsigned)src_x > h_edge_pos - (!!sx) - w
|| (unsigned)src_y >(v_edge_pos >> field_based) - (!!sy) - h){
ff_emulated_edge_mc(s->edge_emu_buffer, src, s->linesize, w+1, (h+1)<<field_based,
src_x, src_y<<field_based, h_edge_pos, v_edge_pos);
src= s->edge_emu_buffer;
emu=1;
}
sx <<= 2 - lowres;
sy <<= 2 - lowres;
if(field_select)
src += s->linesize;
pix_op[lowres](dest, src, stride, h, sx, sy);
return emu;
}
/* apply one mpeg motion vector to the three components */
static always_inline void mpeg_motion(MpegEncContext *s,
uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
@ -2937,6 +2979,56 @@ static inline void chroma_4mv_motion(MpegEncContext *s,
pix_op[dxy](dest_cr, ptr, s->uvlinesize, 8);
}
static inline void chroma_4mv_motion_lowres(MpegEncContext *s,
uint8_t *dest_cb, uint8_t *dest_cr,
uint8_t **ref_picture,
h264_chroma_mc_func *pix_op,
int mx, int my){
const int lowres= s->avctx->lowres;
const int block_s= 8>>lowres;
const int s_mask= (2<<lowres)-1;
const int h_edge_pos = s->h_edge_pos >> (lowres+1);
const int v_edge_pos = s->v_edge_pos >> (lowres+1);
int emu=0, src_x, src_y, offset, sx, sy;
uint8_t *ptr;
if(s->quarter_sample){
mx/=2;
my/=2;
}
/* In case of 8X8, we construct a single chroma motion vector
with a special rounding */
mx= ff_h263_round_chroma(mx);
my= ff_h263_round_chroma(my);
sx= mx & s_mask;
sy= my & s_mask;
src_x = s->mb_x*block_s + (mx >> (lowres+1));
src_y = s->mb_y*block_s + (my >> (lowres+1));
offset = src_y * s->uvlinesize + src_x;
ptr = ref_picture[1] + offset;
if(s->flags&CODEC_FLAG_EMU_EDGE){
if( (unsigned)src_x > h_edge_pos - (!!sx) - block_s
|| (unsigned)src_y > v_edge_pos - (!!sy) - block_s){
ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9, src_x, src_y, h_edge_pos, v_edge_pos);
ptr= s->edge_emu_buffer;
emu=1;
}
}
sx <<= 2 - lowres;
sy <<= 2 - lowres;
pix_op[lowres](dest_cb, ptr, s->uvlinesize, block_s, sx, sy);
ptr = ref_picture[2] + offset;
if(emu){
ff_emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize, 9, 9, src_x, src_y, h_edge_pos, v_edge_pos);
ptr= s->edge_emu_buffer;
}
pix_op[lowres](dest_cr, ptr, s->uvlinesize, block_s, sx, sy);
}
/**
* motion compesation of a single macroblock
* @param s context
@ -3204,9 +3296,8 @@ static inline void MPV_motion_lowres(MpegEncContext *s,
int dir, uint8_t **ref_picture,
h264_chroma_mc_func *pix_op)
{
int dxy, mx, my, src_x, src_y, motion_x, motion_y;
int mx, my;
int mb_x, mb_y, i;
uint8_t *ptr, *dest;
const int lowres= s->avctx->lowres;
const int block_s= 8>>lowres;
@ -3220,16 +3311,16 @@ static inline void MPV_motion_lowres(MpegEncContext *s,
ref_picture, pix_op,
s->mv[dir][0][0], s->mv[dir][0][1], 2*block_s);
break;
/* case MV_TYPE_8X8:
case MV_TYPE_8X8:
mx = 0;
my = 0;
for(i=0;i<4;i++) {
hpel_motion(s, dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize,
hpel_motion_lowres(s, dest_y + ((i & 1) + (i >> 1) * s->linesize)*block_s,
ref_picture[0], 0, 0,
mb_x * 16 + (i & 1) * 8, mb_y * 16 + (i >>1) * 8,
(2*mb_x + (i & 1))*block_s, (2*mb_y + (i >>1))*block_s,
s->width, s->height, s->linesize,
s->h_edge_pos, s->v_edge_pos,
8, 8, pix_op[1],
s->h_edge_pos >> lowres, s->v_edge_pos >> lowres,
block_s, block_s, pix_op,
s->mv[dir][i][0], s->mv[dir][i][1]);
mx += s->mv[dir][i][0];
@ -3237,8 +3328,8 @@ static inline void MPV_motion_lowres(MpegEncContext *s,
}
if(!(s->flags&CODEC_FLAG_GRAY))
chroma_4mv_motion(s, dest_cb, dest_cr, ref_picture, pix_op[1], mx, my);
break;*/
chroma_4mv_motion_lowres(s, dest_cb, dest_cr, ref_picture, pix_op, mx, my);
break;
case MV_TYPE_FIELD:
if (s->picture_structure == PICT_FRAME) {
/* top field */