diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2007-08-01 21:05:58 +0000 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2007-08-01 21:05:58 +0000 |
| commit | f4fbcd33d904915ad51fd9a93fdc2d9201066eb2 (patch) | |
| tree | 4465368b8148c2f820186f745852ffa3c3f217bc /libavcodec/mpeg12.c | |
| parent | dc1ecb6a4afb737f04ca58a3825b20645ad8b1f1 (diff) | |
exchange for() and if() order in the MT_FRAME case
safes 24 cpu cycles
Originally committed as revision 9862 to svn://svn.ffmpeg.org/ffmpeg/trunk
Diffstat (limited to 'libavcodec/mpeg12.c')
| -rw-r--r-- | libavcodec/mpeg12.c | 23 |
1 files changed, 14 insertions, 9 deletions
diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c index 22659e3142..76af2c468d 100644 --- a/libavcodec/mpeg12.c +++ b/libavcodec/mpeg12.c @@ -378,13 +378,13 @@ static int mpeg_decode_mb(MpegEncContext *s, 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) { + if (s->picture_structure == PICT_FRAME) { + mb_type |= MB_TYPE_16x16; + s->mv_type = MV_TYPE_16X16; + for(i=0;i<2;i++) { + if (USES_LIST(mb_type, i)) { + s->mv_dir |= (MV_DIR_FORWARD >> i); /* MT_FRAME */ - mb_type |= MB_TYPE_16x16; - s->mv_type = MV_TYPE_16X16; s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] = mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]); s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] = @@ -394,10 +394,15 @@ static int mpeg_decode_mb(MpegEncContext *s, s->mv[i][0][0] <<= 1; s->mv[i][0][1] <<= 1; } - } else { + } + } + } else { + mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; + s->mv_type = MV_TYPE_16X8; + for(i=0;i<2;i++) { + if (USES_LIST(mb_type, i)) { + s->mv_dir |= (MV_DIR_FORWARD >> i); /* MT_16X8 */ - mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED; - s->mv_type = MV_TYPE_16X8; for(j=0;j<2;j++) { s->field_select[i][j] = get_bits1(&s->gb); for(k=0;k<2;k++) { |