From ad78c0f3f1456a88392acbc859fc66d38ebed499 Mon Sep 17 00:00:00 2001 From: Stefan Gehrer Date: Mon, 3 Jul 2006 18:43:45 +0000 Subject: cleanup macroblock layer: merged decode of skipped MBs with non-skipped Originally committed as revision 5603 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/cavs.c | 84 +++++++++++++++++++++---------------------------------- 1 file changed, 32 insertions(+), 52 deletions(-) (limited to 'libavcodec/cavs.c') diff --git a/libavcodec/cavs.c b/libavcodec/cavs.c index 7ce39c3dcf..d4402106db 100644 --- a/libavcodec/cavs.c +++ b/libavcodec/cavs.c @@ -574,7 +574,8 @@ static inline void mv_pred_median(AVSContext *h, vector_t *mvP, vector_t *mvA, v } static inline void mv_pred_direct(AVSContext *h, vector_t *pmv_fw, - vector_t *pmv_bw, vector_t *col_mv) { + vector_t *col_mv) { + vector_t *pmv_bw = pmv_fw + MV_BWD_OFFS; int den = h->direct_den[col_mv->ref]; int m = col_mv->x >> 31; @@ -862,13 +863,15 @@ static inline int next_mb(AVSContext *h) { return 1; } -static void decode_mb_i(AVSContext *h, int is_i_pic) { +static void decode_mb_i(AVSContext *h) { GetBitContext *gb = &h->s.gb; int block, pred_mode_uv; uint8_t top[18]; uint8_t left[18]; uint8_t *d; + init_mb(h); + /* get intra prediction modes from stream */ for(block=0;block<4;block++) { int nA,nB,predpred; @@ -913,7 +916,7 @@ static void decode_mb_i(AVSContext *h, int is_i_pic) { } /* get coded block pattern */ - if(is_i_pic) + if(h->pic_type == FF_I_TYPE) h->cbp = cbp_tab[get_ue_golomb(gb)][0]; if(h->cbp && !h->qp_fixed) h->qp += get_se_golomb(gb); //qp_delta @@ -960,39 +963,15 @@ static void decode_mb_i(AVSContext *h, int is_i_pic) { *h->col_type = I_8X8; } -static void mb_skip_p(AVSContext *h) { - mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0); - inter_pred(h); - store_mvs(h); - filter_mb(h,P_SKIP); - *h->col_type = P_SKIP; -} - - -static void mb_skip_b(AVSContext *h) { - int i; - - if(!(*h->col_type)) { - /* intra MB at co-location, do in-plane prediction */ - mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1); - mv_pred(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0); - } else { - /* direct prediction from co-located P MB, block-wise */ - for(i=0;i<4;i++) - mv_pred_direct(h,&h->mv[mv_scan[i]], - &h->mv[mv_scan[i]+MV_BWD_OFFS], - &h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + i]); - } -} - static void decode_mb_p(AVSContext *h, enum mb_t mb_type) { GetBitContext *gb = &h->s.gb; int ref[4]; + init_mb(h); switch(mb_type) { case P_SKIP: - mb_skip_p(h); - return; + mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_PSKIP, BLK_16X16, 0); + break; case P_16X16: ref[0] = h->ref_flag ? 0 : get_bits1(gb); mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16,ref[0]); @@ -1021,7 +1000,8 @@ static void decode_mb_p(AVSContext *h, enum mb_t mb_type) { } inter_pred(h); store_mvs(h); - decode_residual_inter(h); + if(mb_type != P_SKIP) + decode_residual_inter(h); filter_mb(h,mb_type); *h->col_type = mb_type; } @@ -1031,6 +1011,8 @@ static void decode_mb_b(AVSContext *h, enum mb_t mb_type) { enum sub_mb_t sub_type[4]; int flags; + init_mb(h); + /* reset all MVs */ h->mv[MV_FWD_X0] = dir_mv; set_mvs(&h->mv[MV_FWD_X0], BLK_16X16); @@ -1038,12 +1020,16 @@ static void decode_mb_b(AVSContext *h, enum mb_t mb_type) { set_mvs(&h->mv[MV_BWD_X0], BLK_16X16); switch(mb_type) { case B_SKIP: - mb_skip_b(h); - inter_pred(h); - filter_mb(h,B_SKIP); - return; case B_DIRECT: - mb_skip_b(h); + if(!(*h->col_type)) { + /* intra MB at co-location, do in-plane prediction */ + mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_BSKIP, BLK_16X16, 1); + mv_pred(h, MV_BWD_X0, MV_BWD_C2, MV_PRED_BSKIP, BLK_16X16, 0); + } else + /* direct prediction from co-located P MB, block-wise */ + for(block=0;block<4;block++) + mv_pred_direct(h,&h->mv[mv_scan[block]], + &h->col_mv[(h->mby*h->mb_width+h->mbx)*4 + block]); break; case B_FWD_16X16: mv_pred(h, MV_FWD_X0, MV_FWD_C2, MV_PRED_MEDIAN, BLK_16X16, 1); @@ -1070,7 +1056,6 @@ static void decode_mb_b(AVSContext *h, enum mb_t mb_type) { MV_PRED_BSKIP, BLK_8X8, 0); } else mv_pred_direct(h,&h->mv[mv_scan[block]], - &h->mv[mv_scan[block]+MV_BWD_OFFS], &h->col_mv[(h->mby*h->mb_width + h->mbx)*4 + block]); break; case B_SUB_FWD: @@ -1131,7 +1116,8 @@ static void decode_mb_b(AVSContext *h, enum mb_t mb_type) { } } inter_pred(h); - decode_residual_inter(h); + if(mb_type != B_SKIP) + decode_residual_inter(h); filter_mb(h,mb_type); } @@ -1199,7 +1185,7 @@ static void init_pic(AVSContext *h) { static int decode_pic(AVSContext *h) { MpegEncContext *s = &h->s; - int i,skip_count; + int skip_count; enum mb_t mb_type; if (!s->context_initialized) { @@ -1273,26 +1259,23 @@ static int decode_pic(AVSContext *h) { check_for_slice(h); if(h->pic_type == FF_I_TYPE) { do { - init_mb(h); - decode_mb_i(h,1); + decode_mb_i(h); } while(next_mb(h)); } else if(h->pic_type == FF_P_TYPE) { do { if(h->skip_mode_flag) { skip_count = get_ue_golomb(&s->gb); - for(i=0;igb) + P_16X16; } else mb_type = get_ue_golomb(&s->gb) + P_SKIP; - init_mb(h); if(mb_type > P_8X8) { h->cbp = cbp_tab[mb_type - P_8X8 - 1][0]; - decode_mb_i(h,0); + decode_mb_i(h); } else decode_mb_p(h,mb_type); } while(next_mb(h)); @@ -1300,11 +1283,8 @@ static int decode_pic(AVSContext *h) { do { if(h->skip_mode_flag) { skip_count = get_ue_golomb(&s->gb); - for(i=0;i B_8X8) { h->cbp = cbp_tab[mb_type - B_8X8 - 1][0]; - decode_mb_i(h,0); + decode_mb_i(h); } else decode_mb_b(h,mb_type); } while(next_mb(h)); -- cgit v1.2.3