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| author | zhaoxiu.zeng <zhaoxiu.zeng@gmail.com> | 2015-02-25 00:28:45 +0800 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2015-02-28 14:57:46 +0100 |
| commit | f6b195cfb9712ae5032881d5dd8c4effb26be0fb (patch) | |
| tree | 82e011ea486cdceecd1af97ab738a069d1087679 | |
| parent | d8e030c3ccd3e4ce3027895504d591954e6efecc (diff) | |
| download | ffmpeg-f6b195cfb9712ae5032881d5dd8c4effb26be0fb.tar.gz | |
avcodec/vc1: Simplify pred/mc loops
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavcodec/vc1_block.c | 62 |
1 files changed, 25 insertions, 37 deletions
diff --git a/libavcodec/vc1_block.c b/libavcodec/vc1_block.c index 206c6a714d..a681034987 100644 --- a/libavcodec/vc1_block.c +++ b/libavcodec/vc1_block.c @@ -1677,19 +1677,14 @@ static int vc1_decode_p_mb_intfr(VC1Context *v) dst_idx = 0; if (fourmv) { mvbp = v->fourmvbp; - for (i = 0; i < 6; i++) { - if (i < 4) { - dmv_x = dmv_y = 0; - val = ((mvbp >> (3 - i)) & 1); - if (val) { - get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0); - } - ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0); - ff_vc1_mc_4mv_luma(v, i, 0, 0); - } else if (i == 4) { - ff_vc1_mc_4mv_chroma4(v, 0, 0, 0); - } + for (i = 0; i < 4; i++) { + dmv_x = dmv_y = 0; + if (mvbp & (8 >> i)) + get_mvdata_interlaced(v, &dmv_x, &dmv_y, 0); + ff_vc1_pred_mv_intfr(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], 0); + ff_vc1_mc_4mv_luma(v, i, 0, 0); } + ff_vc1_mc_4mv_chroma4(v, 0, 0, 0); } else if (twomv) { mvbp = v->twomvbp; dmv_x = dmv_y = 0; @@ -1836,18 +1831,14 @@ static int vc1_decode_p_mb_intfi(VC1Context *v) mb_has_coeffs = !(idx_mbmode & 2); } else { // 4-MV v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1); - for (i = 0; i < 6; i++) { - if (i < 4) { - dmv_x = dmv_y = pred_flag = 0; - val = ((v->fourmvbp >> (3 - i)) & 1); - if (val) { - get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag); - } - ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0); - ff_vc1_mc_4mv_luma(v, i, 0, 0); - } else if (i == 4) - ff_vc1_mc_4mv_chroma(v, 0); + for (i = 0; i < 4; i++) { + dmv_x = dmv_y = pred_flag = 0; + if (v->fourmvbp & (8 >> i)) + get_mvdata_interlaced(v, &dmv_x, &dmv_y, &pred_flag); + ff_vc1_pred_mv(v, i, dmv_x, dmv_y, 0, v->range_x, v->range_y, v->mb_type[0], pred_flag, 0); + ff_vc1_mc_4mv_luma(v, i, 0, 0); } + ff_vc1_mc_4mv_chroma(v, 0); mb_has_coeffs = idx_mbmode & 1; } if (mb_has_coeffs) @@ -2154,21 +2145,18 @@ static void vc1_decode_b_mb_intfi(VC1Context *v) bmvtype = BMV_TYPE_FORWARD; v->bmvtype = bmvtype; v->fourmvbp = get_vlc2(gb, v->fourmvbp_vlc->table, VC1_4MV_BLOCK_PATTERN_VLC_BITS, 1); - for (i = 0; i < 6; i++) { - if (i < 4) { - dmv_x[0] = dmv_y[0] = pred_flag[0] = 0; - dmv_x[1] = dmv_y[1] = pred_flag[1] = 0; - val = ((v->fourmvbp >> (3 - i)) & 1); - if (val) { - get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], - &dmv_y[bmvtype == BMV_TYPE_BACKWARD], - &pred_flag[bmvtype == BMV_TYPE_BACKWARD]); - } - ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag); - ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0); - } else if (i == 4) - ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD); + for (i = 0; i < 4; i++) { + dmv_x[0] = dmv_y[0] = pred_flag[0] = 0; + dmv_x[1] = dmv_y[1] = pred_flag[1] = 0; + if (v->fourmvbp & (8 >> i)) { + get_mvdata_interlaced(v, &dmv_x[bmvtype == BMV_TYPE_BACKWARD], + &dmv_y[bmvtype == BMV_TYPE_BACKWARD], + &pred_flag[bmvtype == BMV_TYPE_BACKWARD]); + } + ff_vc1_pred_b_mv_intfi(v, i, dmv_x, dmv_y, 0, pred_flag); + ff_vc1_mc_4mv_luma(v, i, bmvtype == BMV_TYPE_BACKWARD, 0); } + ff_vc1_mc_4mv_chroma(v, bmvtype == BMV_TYPE_BACKWARD); mb_has_coeffs = idx_mbmode & 1; } if (mb_has_coeffs) |