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ffmpeg-mt
Commit 650788c4 authored by michael's avatar michael
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change 

for(){
    if(){
        switch(){

to
switch(){
    for(){
        if(){

this halfs the number of times the switch is executed in bidir blocks, in 
other blocks the number is the same


git-svn-id: file:///var/local/repositories/ffmpeg/trunk@9860 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b
parent f570727b
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Showing with 66 additions and 59 deletions
libavcodec/mpeg12.c
View file @ 650788c4
......@@ -375,12 +375,12 @@ static int mpeg_decode_mb(MpegEncContext *s,
/* motion vectors */
s->mv_dir = 0;
for(i=0;i<2;i++) {
if (USES_LIST(mb_type, i)) {
s->mv_dir |= (MV_DIR_FORWARD >> i);
dprintf(s->avctx, "motion_type=%d\n", motion_type);
switch(motion_type) {
case MT_FRAME: /* or MT_16X8 */
dprintf(s->avctx, "motion_type=%d\n", motion_type);
switch(motion_type) {
case MT_FRAME: /* or MT_16X8 */
for(i=0;i<2;i++) {
if (USES_LIST(mb_type, i)) {
s->mv_dir |= (MV_DIR_FORWARD >> i);
if (s->picture_structure == PICT_FRAME) {
/* MT_FRAME */
mb_type |= MB_TYPE_16x16;
......@@ -408,9 +408,14 @@ static int mpeg_decode_mb(MpegEncContext *s,
}
}
}
break;
case MT_FIELD:
s->mv_type = MV_TYPE_FIELD;
}
}
break;
case MT_FIELD:
s->mv_type = MV_TYPE_FIELD;
for(i=0;i<2;i++) {
if (USES_LIST(mb_type, i)) {
s->mv_dir |= (MV_DIR_FORWARD >> i);
if (s->picture_structure == PICT_FRAME) {
mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
for(j=0;j<2;j++) {
......@@ -437,59 +442,61 @@ static int mpeg_decode_mb(MpegEncContext *s,
s->mv[i][0][k] = val;
}
}
break;
case MT_DMV:
{
int dmx, dmy, mx, my, m;
mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
s->last_mv[i][0][0]);
s->last_mv[i][0][0] = mx;
s->last_mv[i][1][0] = mx;
dmx = get_dmv(s);
my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
s->last_mv[i][0][1] >> 1);
dmy = get_dmv(s);
s->mv_type = MV_TYPE_DMV;
s->last_mv[i][0][1] = my<<1;
s->last_mv[i][1][1] = my<<1;
s->mv[i][0][0] = mx;
s->mv[i][0][1] = my;
s->mv[i][1][0] = mx;//not used
s->mv[i][1][1] = my;//not used
if (s->picture_structure == PICT_FRAME) {
mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
//m = 1 + 2 * s->top_field_first;
m = s->top_field_first ? 1 : 3;
/* top -> top pred */
s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
m = 4 - m;
s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
} else {
mb_type |= MB_TYPE_16x16;
s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
if(s->picture_structure == PICT_TOP_FIELD)
s->mv[i][2][1]--;
else
s->mv[i][2][1]++;
}
}
}
break;
case MT_DMV:
s->mv_type = MV_TYPE_DMV;
for(i=0;i<2;i++) {
if (USES_LIST(mb_type, i)) {
int dmx, dmy, mx, my, m;
s->mv_dir |= (MV_DIR_FORWARD >> i);
mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
s->last_mv[i][0][0]);
s->last_mv[i][0][0] = mx;
s->last_mv[i][1][0] = mx;
dmx = get_dmv(s);
my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
s->last_mv[i][0][1] >> 1);
dmy = get_dmv(s);
s->last_mv[i][0][1] = my<<1;
s->last_mv[i][1][1] = my<<1;
s->mv[i][0][0] = mx;
s->mv[i][0][1] = my;
s->mv[i][1][0] = mx;//not used
s->mv[i][1][1] = my;//not used
if (s->picture_structure == PICT_FRAME) {
mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
//m = 1 + 2 * s->top_field_first;
m = s->top_field_first ? 1 : 3;
/* top -> top pred */
s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
m = 4 - m;
s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
} else {
mb_type |= MB_TYPE_16x16;
s->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
if(s->picture_structure == PICT_TOP_FIELD)
s->mv[i][2][1]--;
else
s->mv[i][2][1]++;
}
break;
default:
av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
}
break;
default:
av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
}
......
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