diff options
Diffstat (limited to 'libvpx/vp8/common/loopfilter.c')
| -rw-r--r-- | libvpx/vp8/common/loopfilter.c | 679 |
1 files changed, 679 insertions, 0 deletions
diff --git a/libvpx/vp8/common/loopfilter.c b/libvpx/vp8/common/loopfilter.c new file mode 100644 index 0000000..41b4f12 --- /dev/null +++ b/libvpx/vp8/common/loopfilter.c @@ -0,0 +1,679 @@ +/* + * 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 "vpx_rtcd.h" +#include "loopfilter.h" +#include "onyxc_int.h" +#include "vpx_mem/vpx_mem.h" + +typedef unsigned char uc; + +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; + + vpx_memset(lfi->lim[i], block_inside_limit, SIMD_WIDTH); + vpx_memset(lfi->blim[i], (2 * filt_lvl + block_inside_limit), + SIMD_WIDTH); + vpx_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++) + { + vpx_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 + */ + vpx_memset(lfi->lvl[seg][0], lvl_seg, 4 * 4 ); + continue; + } + + lvl_ref = lvl_seg; + + /* INTRA_FRAME */ + ref = INTRA_FRAME; + + /* Apply delta for reference frame */ + lvl_ref += 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]; + lvl_mode = (lvl_mode > 0) ? (lvl_mode > 63 ? 63 : lvl_mode) : 0; /* clamp */ + + lfi->lvl[seg][ref][mode] = lvl_mode; + + mode = 1; /* all the rest of Intra modes */ + lvl_mode = (lvl_ref > 0) ? (lvl_ref > 63 ? 63 : lvl_ref) : 0; /* clamp */ + lfi->lvl[seg][ref][mode] = lvl_mode; + + /* LAST, GOLDEN, ALT */ + for(ref = 1; ref < MAX_REF_FRAMES; ref++) + { + int lvl_ref = lvl_seg; + + /* Apply delta for reference frame */ + lvl_ref += 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]; + lvl_mode = (lvl_mode > 0) ? (lvl_mode > 63 ? 63 : lvl_mode) : 0; /* clamp */ + + 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; + + 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, i; + + loop_filter_info_n *lfi_n = &cm->lf_info; + loop_filter_info lfi; + + int filter_level; + int alt_flt_enabled = mbd->segmentation_enabled; + FRAME_TYPE frame_type = cm->frame_type; + + const MODE_INFO *mode_info_context; + + int lvl_seg[MAX_MB_SEGMENTS]; + + /* number of MB rows to use in partial filtering */ + linestocopy = mb_rows / PARTIAL_FRAME_FRACTION; + linestocopy = linestocopy ? linestocopy << 4 : 16; /* 16 lines per MB */ + + /* Note the baseline filter values for each segment */ + /* See vp8_loop_filter_frame_init. Rather than call that for each change + * to default_filt_lvl, copy the relevant calculation here. + */ + if (alt_flt_enabled) + { + for (i = 0; i < MAX_MB_SEGMENTS; i++) + { /* Abs value */ + if (mbd->mb_segement_abs_delta == SEGMENT_ABSDATA) + { + lvl_seg[i] = mbd->segment_feature_data[MB_LVL_ALT_LF][i]; + } + /* Delta Value */ + else + { + lvl_seg[i] = default_filt_lvl + + mbd->segment_feature_data[MB_LVL_ALT_LF][i]; + lvl_seg[i] = (lvl_seg[i] > 0) ? + ((lvl_seg[i] > 63) ? 63: lvl_seg[i]) : 0; + } + } + } + + /* 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); + + if (alt_flt_enabled) + filter_level = lvl_seg[mode_info_context->mbmi.segment_id]; + else + filter_level = default_filt_lvl; + + 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 */ + } +} |