ref: c760c33b993c26376631474a54f2f04a58aaf8a2
dir: /vp8/common/vp8_loopfilter.c/
/* * Copyright (c) 2010 The WebM project authors. All Rights Reserved. * * Use of this source code is governed by a BSD-style license * that can be found in the LICENSE file in the root of the source * tree. An additional intellectual property rights grant can be found * in the file PATENTS. All contributing project authors may * be found in the AUTHORS file in the root of the source tree. */ #include "vpx_config.h" #include "vp8_rtcd.h" #include "loopfilter.h" #include "onyxc_int.h" #include "vpx_mem/vpx_mem.h" static void lf_init_lut(loop_filter_info_n *lfi) { int filt_lvl; for (filt_lvl = 0; filt_lvl <= MAX_LOOP_FILTER; filt_lvl++) { if (filt_lvl >= 40) { lfi->hev_thr_lut[KEY_FRAME][filt_lvl] = 2; lfi->hev_thr_lut[INTER_FRAME][filt_lvl] = 3; } else if (filt_lvl >= 20) { lfi->hev_thr_lut[KEY_FRAME][filt_lvl] = 1; lfi->hev_thr_lut[INTER_FRAME][filt_lvl] = 2; } else if (filt_lvl >= 15) { lfi->hev_thr_lut[KEY_FRAME][filt_lvl] = 1; lfi->hev_thr_lut[INTER_FRAME][filt_lvl] = 1; } else { lfi->hev_thr_lut[KEY_FRAME][filt_lvl] = 0; lfi->hev_thr_lut[INTER_FRAME][filt_lvl] = 0; } } lfi->mode_lf_lut[DC_PRED] = 1; lfi->mode_lf_lut[V_PRED] = 1; lfi->mode_lf_lut[H_PRED] = 1; lfi->mode_lf_lut[TM_PRED] = 1; lfi->mode_lf_lut[B_PRED] = 0; lfi->mode_lf_lut[ZEROMV] = 1; lfi->mode_lf_lut[NEARESTMV] = 2; lfi->mode_lf_lut[NEARMV] = 2; lfi->mode_lf_lut[NEWMV] = 2; lfi->mode_lf_lut[SPLITMV] = 3; } void vp8_loop_filter_update_sharpness(loop_filter_info_n *lfi, int sharpness_lvl) { int i; /* For each possible value for the loop filter fill out limits */ for (i = 0; i <= MAX_LOOP_FILTER; i++) { int filt_lvl = i; int block_inside_limit = 0; /* Set loop filter paramaeters that control sharpness. */ block_inside_limit = filt_lvl >> (sharpness_lvl > 0); block_inside_limit = block_inside_limit >> (sharpness_lvl > 4); if (sharpness_lvl > 0) { if (block_inside_limit > (9 - sharpness_lvl)) block_inside_limit = (9 - sharpness_lvl); } if (block_inside_limit < 1) block_inside_limit = 1; memset(lfi->lim[i], block_inside_limit, SIMD_WIDTH); memset(lfi->blim[i], (2 * filt_lvl + block_inside_limit), SIMD_WIDTH); memset(lfi->mblim[i], (2 * (filt_lvl + 2) + block_inside_limit), SIMD_WIDTH); } } void vp8_loop_filter_init(VP8_COMMON *cm) { loop_filter_info_n *lfi = &cm->lf_info; int i; /* init limits for given sharpness*/ vp8_loop_filter_update_sharpness(lfi, cm->sharpness_level); cm->last_sharpness_level = cm->sharpness_level; /* init LUT for lvl and hev thr picking */ lf_init_lut(lfi); /* init hev threshold const vectors */ for(i = 0; i < 4 ; i++) { memset(lfi->hev_thr[i], i, SIMD_WIDTH); } } void vp8_loop_filter_frame_init(VP8_COMMON *cm, MACROBLOCKD *mbd, int default_filt_lvl) { int seg, /* segment number */ ref, /* index in ref_lf_deltas */ mode; /* index in mode_lf_deltas */ loop_filter_info_n *lfi = &cm->lf_info; /* update limits if sharpness has changed */ if(cm->last_sharpness_level != cm->sharpness_level) { vp8_loop_filter_update_sharpness(lfi, cm->sharpness_level); cm->last_sharpness_level = cm->sharpness_level; } for(seg = 0; seg < MAX_MB_SEGMENTS; seg++) { int lvl_seg = default_filt_lvl; int lvl_ref, lvl_mode; /* Note the baseline filter values for each segment */ if (mbd->segmentation_enabled) { /* Abs value */ if (mbd->mb_segement_abs_delta == SEGMENT_ABSDATA) { lvl_seg = mbd->segment_feature_data[MB_LVL_ALT_LF][seg]; } else /* Delta Value */ { lvl_seg += mbd->segment_feature_data[MB_LVL_ALT_LF][seg]; } lvl_seg = (lvl_seg > 0) ? ((lvl_seg > 63) ? 63: lvl_seg) : 0; } if (!mbd->mode_ref_lf_delta_enabled) { /* we could get rid of this if we assume that deltas are set to * zero when not in use; encoder always uses deltas */ memset(lfi->lvl[seg][0], lvl_seg, 4 * 4 ); continue; } /* INTRA_FRAME */ ref = INTRA_FRAME; /* Apply delta for reference frame */ lvl_ref = lvl_seg + mbd->ref_lf_deltas[ref]; /* Apply delta for Intra modes */ mode = 0; /* B_PRED */ /* Only the split mode BPRED has a further special case */ lvl_mode = lvl_ref + mbd->mode_lf_deltas[mode]; /* clamp */ lvl_mode = (lvl_mode > 0) ? (lvl_mode > 63 ? 63 : lvl_mode) : 0; lfi->lvl[seg][ref][mode] = lvl_mode; mode = 1; /* all the rest of Intra modes */ /* clamp */ lvl_mode = (lvl_ref > 0) ? (lvl_ref > 63 ? 63 : lvl_ref) : 0; lfi->lvl[seg][ref][mode] = lvl_mode; /* LAST, GOLDEN, ALT */ for(ref = 1; ref < MAX_REF_FRAMES; ref++) { /* Apply delta for reference frame */ lvl_ref = lvl_seg + mbd->ref_lf_deltas[ref]; /* Apply delta for Inter modes */ for (mode = 1; mode < 4; mode++) { lvl_mode = lvl_ref + mbd->mode_lf_deltas[mode]; /* clamp */ lvl_mode = (lvl_mode > 0) ? (lvl_mode > 63 ? 63 : lvl_mode) : 0; lfi->lvl[seg][ref][mode] = lvl_mode; } } } } void vp8_loop_filter_row_normal(VP8_COMMON *cm, MODE_INFO *mode_info_context, int mb_row, int post_ystride, int post_uvstride, unsigned char *y_ptr, unsigned char *u_ptr, unsigned char *v_ptr) { int mb_col; int filter_level; loop_filter_info_n *lfi_n = &cm->lf_info; loop_filter_info lfi; FRAME_TYPE frame_type = cm->frame_type; for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) { int skip_lf = (mode_info_context->mbmi.mode != B_PRED && mode_info_context->mbmi.mode != SPLITMV && mode_info_context->mbmi.mb_skip_coeff); const int mode_index = lfi_n->mode_lf_lut[mode_info_context->mbmi.mode]; const int seg = mode_info_context->mbmi.segment_id; const int ref_frame = mode_info_context->mbmi.ref_frame; filter_level = lfi_n->lvl[seg][ref_frame][mode_index]; if (filter_level) { const int hev_index = lfi_n->hev_thr_lut[frame_type][filter_level]; lfi.mblim = lfi_n->mblim[filter_level]; lfi.blim = lfi_n->blim[filter_level]; lfi.lim = lfi_n->lim[filter_level]; lfi.hev_thr = lfi_n->hev_thr[hev_index]; if (mb_col > 0) vp8_loop_filter_mbv (y_ptr, u_ptr, v_ptr, post_ystride, post_uvstride, &lfi); if (!skip_lf) vp8_loop_filter_bv (y_ptr, u_ptr, v_ptr, post_ystride, post_uvstride, &lfi); /* don't apply across umv border */ if (mb_row > 0) vp8_loop_filter_mbh (y_ptr, u_ptr, v_ptr, post_ystride, post_uvstride, &lfi); if (!skip_lf) vp8_loop_filter_bh (y_ptr, u_ptr, v_ptr, post_ystride, post_uvstride, &lfi); } y_ptr += 16; u_ptr += 8; v_ptr += 8; mode_info_context++; /* step to next MB */ } } void vp8_loop_filter_row_simple(VP8_COMMON *cm, MODE_INFO *mode_info_context, int mb_row, int post_ystride, int post_uvstride, unsigned char *y_ptr, unsigned char *u_ptr, unsigned char *v_ptr) { int mb_col; int filter_level; loop_filter_info_n *lfi_n = &cm->lf_info; (void)post_uvstride; for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) { int skip_lf = (mode_info_context->mbmi.mode != B_PRED && mode_info_context->mbmi.mode != SPLITMV && mode_info_context->mbmi.mb_skip_coeff); const int mode_index = lfi_n->mode_lf_lut[mode_info_context->mbmi.mode]; const int seg = mode_info_context->mbmi.segment_id; const int ref_frame = mode_info_context->mbmi.ref_frame; filter_level = lfi_n->lvl[seg][ref_frame][mode_index]; if (filter_level) { if (mb_col > 0) vp8_loop_filter_simple_mbv (y_ptr, post_ystride, lfi_n->mblim[filter_level]); if (!skip_lf) vp8_loop_filter_simple_bv (y_ptr, post_ystride, lfi_n->blim[filter_level]); /* don't apply across umv border */ if (mb_row > 0) vp8_loop_filter_simple_mbh (y_ptr, post_ystride, lfi_n->mblim[filter_level]); if (!skip_lf) vp8_loop_filter_simple_bh (y_ptr, post_ystride, lfi_n->blim[filter_level]); } y_ptr += 16; u_ptr += 8; v_ptr += 8; mode_info_context++; /* step to next MB */ } } void vp8_loop_filter_frame(VP8_COMMON *cm, MACROBLOCKD *mbd, int frame_type) { YV12_BUFFER_CONFIG *post = cm->frame_to_show; loop_filter_info_n *lfi_n = &cm->lf_info; loop_filter_info lfi; int mb_row; int mb_col; int mb_rows = cm->mb_rows; int mb_cols = cm->mb_cols; int filter_level; unsigned char *y_ptr, *u_ptr, *v_ptr; /* Point at base of Mb MODE_INFO list */ const MODE_INFO *mode_info_context = cm->mi; int post_y_stride = post->y_stride; int post_uv_stride = post->uv_stride; /* Initialize the loop filter for this frame. */ vp8_loop_filter_frame_init(cm, mbd, cm->filter_level); /* Set up the buffer pointers */ y_ptr = post->y_buffer; u_ptr = post->u_buffer; v_ptr = post->v_buffer; /* vp8_filter each macro block */ if (cm->filter_type == NORMAL_LOOPFILTER) { for (mb_row = 0; mb_row < mb_rows; mb_row++) { for (mb_col = 0; mb_col < mb_cols; mb_col++) { int skip_lf = (mode_info_context->mbmi.mode != B_PRED && mode_info_context->mbmi.mode != SPLITMV && mode_info_context->mbmi.mb_skip_coeff); const int mode_index = lfi_n->mode_lf_lut[mode_info_context->mbmi.mode]; const int seg = mode_info_context->mbmi.segment_id; const int ref_frame = mode_info_context->mbmi.ref_frame; filter_level = lfi_n->lvl[seg][ref_frame][mode_index]; if (filter_level) { const int hev_index = lfi_n->hev_thr_lut[frame_type][filter_level]; lfi.mblim = lfi_n->mblim[filter_level]; lfi.blim = lfi_n->blim[filter_level]; lfi.lim = lfi_n->lim[filter_level]; lfi.hev_thr = lfi_n->hev_thr[hev_index]; if (mb_col > 0) vp8_loop_filter_mbv (y_ptr, u_ptr, v_ptr, post_y_stride, post_uv_stride, &lfi); if (!skip_lf) vp8_loop_filter_bv (y_ptr, u_ptr, v_ptr, post_y_stride, post_uv_stride, &lfi); /* don't apply across umv border */ if (mb_row > 0) vp8_loop_filter_mbh (y_ptr, u_ptr, v_ptr, post_y_stride, post_uv_stride, &lfi); if (!skip_lf) vp8_loop_filter_bh (y_ptr, u_ptr, v_ptr, post_y_stride, post_uv_stride, &lfi); } y_ptr += 16; u_ptr += 8; v_ptr += 8; mode_info_context++; /* step to next MB */ } y_ptr += post_y_stride * 16 - post->y_width; u_ptr += post_uv_stride * 8 - post->uv_width; v_ptr += post_uv_stride * 8 - post->uv_width; mode_info_context++; /* Skip border mb */ } } else /* SIMPLE_LOOPFILTER */ { for (mb_row = 0; mb_row < mb_rows; mb_row++) { for (mb_col = 0; mb_col < mb_cols; mb_col++) { int skip_lf = (mode_info_context->mbmi.mode != B_PRED && mode_info_context->mbmi.mode != SPLITMV && mode_info_context->mbmi.mb_skip_coeff); const int mode_index = lfi_n->mode_lf_lut[mode_info_context->mbmi.mode]; const int seg = mode_info_context->mbmi.segment_id; const int ref_frame = mode_info_context->mbmi.ref_frame; filter_level = lfi_n->lvl[seg][ref_frame][mode_index]; if (filter_level) { const unsigned char * mblim = lfi_n->mblim[filter_level]; const unsigned char * blim = lfi_n->blim[filter_level]; if (mb_col > 0) vp8_loop_filter_simple_mbv (y_ptr, post_y_stride, mblim); if (!skip_lf) vp8_loop_filter_simple_bv (y_ptr, post_y_stride, blim); /* don't apply across umv border */ if (mb_row > 0) vp8_loop_filter_simple_mbh (y_ptr, post_y_stride, mblim); if (!skip_lf) vp8_loop_filter_simple_bh (y_ptr, post_y_stride, blim); } y_ptr += 16; u_ptr += 8; v_ptr += 8; mode_info_context++; /* step to next MB */ } y_ptr += post_y_stride * 16 - post->y_width; u_ptr += post_uv_stride * 8 - post->uv_width; v_ptr += post_uv_stride * 8 - post->uv_width; mode_info_context++; /* Skip border mb */ } } } void vp8_loop_filter_frame_yonly ( VP8_COMMON *cm, MACROBLOCKD *mbd, int default_filt_lvl ) { YV12_BUFFER_CONFIG *post = cm->frame_to_show; unsigned char *y_ptr; int mb_row; int mb_col; loop_filter_info_n *lfi_n = &cm->lf_info; loop_filter_info lfi; int filter_level; FRAME_TYPE frame_type = cm->frame_type; /* Point at base of Mb MODE_INFO list */ const MODE_INFO *mode_info_context = cm->mi; #if 0 if(default_filt_lvl == 0) /* no filter applied */ return; #endif /* Initialize the loop filter for this frame. */ vp8_loop_filter_frame_init( cm, mbd, default_filt_lvl); /* Set up the buffer pointers */ y_ptr = post->y_buffer; /* vp8_filter each macro block */ for (mb_row = 0; mb_row < cm->mb_rows; mb_row++) { for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) { int skip_lf = (mode_info_context->mbmi.mode != B_PRED && mode_info_context->mbmi.mode != SPLITMV && mode_info_context->mbmi.mb_skip_coeff); const int mode_index = lfi_n->mode_lf_lut[mode_info_context->mbmi.mode]; const int seg = mode_info_context->mbmi.segment_id; const int ref_frame = mode_info_context->mbmi.ref_frame; filter_level = lfi_n->lvl[seg][ref_frame][mode_index]; if (filter_level) { if (cm->filter_type == NORMAL_LOOPFILTER) { const int hev_index = lfi_n->hev_thr_lut[frame_type][filter_level]; lfi.mblim = lfi_n->mblim[filter_level]; lfi.blim = lfi_n->blim[filter_level]; lfi.lim = lfi_n->lim[filter_level]; lfi.hev_thr = lfi_n->hev_thr[hev_index]; if (mb_col > 0) vp8_loop_filter_mbv (y_ptr, 0, 0, post->y_stride, 0, &lfi); if (!skip_lf) vp8_loop_filter_bv (y_ptr, 0, 0, post->y_stride, 0, &lfi); /* don't apply across umv border */ if (mb_row > 0) vp8_loop_filter_mbh (y_ptr, 0, 0, post->y_stride, 0, &lfi); if (!skip_lf) vp8_loop_filter_bh (y_ptr, 0, 0, post->y_stride, 0, &lfi); } else { if (mb_col > 0) vp8_loop_filter_simple_mbv (y_ptr, post->y_stride, lfi_n->mblim[filter_level]); if (!skip_lf) vp8_loop_filter_simple_bv (y_ptr, post->y_stride, lfi_n->blim[filter_level]); /* don't apply across umv border */ if (mb_row > 0) vp8_loop_filter_simple_mbh (y_ptr, post->y_stride, lfi_n->mblim[filter_level]); if (!skip_lf) vp8_loop_filter_simple_bh (y_ptr, post->y_stride, lfi_n->blim[filter_level]); } } y_ptr += 16; mode_info_context ++; /* step to next MB */ } y_ptr += post->y_stride * 16 - post->y_width; mode_info_context ++; /* Skip border mb */ } } void vp8_loop_filter_partial_frame ( VP8_COMMON *cm, MACROBLOCKD *mbd, int default_filt_lvl ) { YV12_BUFFER_CONFIG *post = cm->frame_to_show; unsigned char *y_ptr; int mb_row; int mb_col; int mb_cols = post->y_width >> 4; int mb_rows = post->y_height >> 4; int linestocopy; loop_filter_info_n *lfi_n = &cm->lf_info; loop_filter_info lfi; int filter_level; FRAME_TYPE frame_type = cm->frame_type; const MODE_INFO *mode_info_context; #if 0 if(default_filt_lvl == 0) /* no filter applied */ return; #endif /* Initialize the loop filter for this frame. */ vp8_loop_filter_frame_init( cm, mbd, default_filt_lvl); /* number of MB rows to use in partial filtering */ linestocopy = mb_rows / PARTIAL_FRAME_FRACTION; linestocopy = linestocopy ? linestocopy << 4 : 16; /* 16 lines per MB */ /* Set up the buffer pointers; partial image starts at ~middle of frame */ y_ptr = post->y_buffer + ((post->y_height >> 5) * 16) * post->y_stride; mode_info_context = cm->mi + (post->y_height >> 5) * (mb_cols + 1); /* vp8_filter each macro block */ for (mb_row = 0; mb_row<(linestocopy >> 4); mb_row++) { for (mb_col = 0; mb_col < mb_cols; mb_col++) { int skip_lf = (mode_info_context->mbmi.mode != B_PRED && mode_info_context->mbmi.mode != SPLITMV && mode_info_context->mbmi.mb_skip_coeff); const int mode_index = lfi_n->mode_lf_lut[mode_info_context->mbmi.mode]; const int seg = mode_info_context->mbmi.segment_id; const int ref_frame = mode_info_context->mbmi.ref_frame; filter_level = lfi_n->lvl[seg][ref_frame][mode_index]; if (filter_level) { if (cm->filter_type == NORMAL_LOOPFILTER) { const int hev_index = lfi_n->hev_thr_lut[frame_type][filter_level]; lfi.mblim = lfi_n->mblim[filter_level]; lfi.blim = lfi_n->blim[filter_level]; lfi.lim = lfi_n->lim[filter_level]; lfi.hev_thr = lfi_n->hev_thr[hev_index]; if (mb_col > 0) vp8_loop_filter_mbv (y_ptr, 0, 0, post->y_stride, 0, &lfi); if (!skip_lf) vp8_loop_filter_bv (y_ptr, 0, 0, post->y_stride, 0, &lfi); vp8_loop_filter_mbh (y_ptr, 0, 0, post->y_stride, 0, &lfi); if (!skip_lf) vp8_loop_filter_bh (y_ptr, 0, 0, post->y_stride, 0, &lfi); } else { if (mb_col > 0) vp8_loop_filter_simple_mbv (y_ptr, post->y_stride, lfi_n->mblim[filter_level]); if (!skip_lf) vp8_loop_filter_simple_bv (y_ptr, post->y_stride, lfi_n->blim[filter_level]); vp8_loop_filter_simple_mbh (y_ptr, post->y_stride, lfi_n->mblim[filter_level]); if (!skip_lf) vp8_loop_filter_simple_bh (y_ptr, post->y_stride, lfi_n->blim[filter_level]); } } y_ptr += 16; mode_info_context += 1; /* step to next MB */ } y_ptr += post->y_stride * 16 - post->y_width; mode_info_context += 1; /* Skip border mb */ } }