diff options
Diffstat (limited to 'third_party/aom/av1/encoder/mbgraph.c')
| -rw-r--r-- | third_party/aom/av1/encoder/mbgraph.c | 398 |
1 files changed, 398 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/mbgraph.c b/third_party/aom/av1/encoder/mbgraph.c new file mode 100644 index 000000000..1296027dc --- /dev/null +++ b/third_party/aom/av1/encoder/mbgraph.c @@ -0,0 +1,398 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +#include <limits.h> + +#include "./av1_rtcd.h" +#include "./aom_dsp_rtcd.h" + +#include "aom_dsp/aom_dsp_common.h" +#include "aom_mem/aom_mem.h" +#include "aom_ports/system_state.h" +#include "av1/encoder/segmentation.h" +#include "av1/encoder/mcomp.h" +#include "av1/common/blockd.h" +#include "av1/common/reconinter.h" +#include "av1/common/reconintra.h" + +static unsigned int do_16x16_motion_iteration(AV1_COMP *cpi, const MV *ref_mv, + int mb_row, int mb_col) { + MACROBLOCK *const x = &cpi->td.mb; + MACROBLOCKD *const xd = &x->e_mbd; + const MV_SPEED_FEATURES *const mv_sf = &cpi->sf.mv; + const aom_variance_fn_ptr_t v_fn_ptr = cpi->fn_ptr[BLOCK_16X16]; + + const MvLimits tmp_mv_limits = x->mv_limits; + MV ref_full; + int cost_list[5]; + + // Further step/diamond searches as necessary + int step_param = mv_sf->reduce_first_step_size; + step_param = AOMMIN(step_param, MAX_MVSEARCH_STEPS - 2); + + av1_set_mv_search_range(&x->mv_limits, ref_mv); + + ref_full.col = ref_mv->col >> 3; + ref_full.row = ref_mv->row >> 3; + + /*cpi->sf.search_method == HEX*/ + av1_hex_search(x, &ref_full, step_param, x->errorperbit, 0, + cond_cost_list(cpi, cost_list), &v_fn_ptr, 0, ref_mv); + + // Try sub-pixel MC + // if (bestsme > error_thresh && bestsme < INT_MAX) + { + int distortion; + unsigned int sse; + cpi->find_fractional_mv_step(x, ref_mv, cpi->common.allow_high_precision_mv, + x->errorperbit, &v_fn_ptr, 0, + mv_sf->subpel_iters_per_step, + cond_cost_list(cpi, cost_list), NULL, NULL, + &distortion, &sse, NULL, 0, 0, 0); + } + +#if CONFIG_EXT_INTER + if (has_second_ref(&xd->mi[0]->mbmi)) + xd->mi[0]->mbmi.mode = NEW_NEWMV; + else +#endif // CONFIG_EXT_INTER + xd->mi[0]->mbmi.mode = NEWMV; + + xd->mi[0]->mbmi.mv[0] = x->best_mv; +#if CONFIG_EXT_INTER + xd->mi[0]->mbmi.ref_frame[1] = NONE_FRAME; +#endif // CONFIG_EXT_INTER + + av1_build_inter_predictors_sby(xd, mb_row, mb_col, NULL, BLOCK_16X16); + + /* restore UMV window */ + x->mv_limits = tmp_mv_limits; + + return aom_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride, + xd->plane[0].dst.buf, xd->plane[0].dst.stride); +} + +static int do_16x16_motion_search(AV1_COMP *cpi, const MV *ref_mv, int mb_row, + int mb_col) { + MACROBLOCK *const x = &cpi->td.mb; + MACROBLOCKD *const xd = &x->e_mbd; + unsigned int err, tmp_err; + MV best_mv; + + // Try zero MV first + // FIXME should really use something like near/nearest MV and/or MV prediction + err = aom_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride, + xd->plane[0].pre[0].buf, xd->plane[0].pre[0].stride); + best_mv.col = best_mv.row = 0; + + // Test last reference frame using the previous best mv as the + // starting point (best reference) for the search + tmp_err = do_16x16_motion_iteration(cpi, ref_mv, mb_row, mb_col); + if (tmp_err < err) { + err = tmp_err; + best_mv = x->best_mv.as_mv; + } + + // If the current best reference mv is not centered on 0,0 then do a 0,0 + // based search as well. + if (ref_mv->row != 0 || ref_mv->col != 0) { + MV zero_ref_mv = { 0, 0 }; + + tmp_err = do_16x16_motion_iteration(cpi, &zero_ref_mv, mb_row, mb_col); + if (tmp_err < err) { + err = tmp_err; + best_mv = x->best_mv.as_mv; + } + } + + x->best_mv.as_mv = best_mv; + return err; +} + +static int do_16x16_zerozero_search(AV1_COMP *cpi, int_mv *dst_mv) { + MACROBLOCK *const x = &cpi->td.mb; + MACROBLOCKD *const xd = &x->e_mbd; + unsigned int err; + + // Try zero MV first + // FIXME should really use something like near/nearest MV and/or MV prediction + err = aom_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride, + xd->plane[0].pre[0].buf, xd->plane[0].pre[0].stride); + + dst_mv->as_int = 0; + + return err; +} +static int find_best_16x16_intra(AV1_COMP *cpi, PREDICTION_MODE *pbest_mode) { + MACROBLOCK *const x = &cpi->td.mb; + MACROBLOCKD *const xd = &x->e_mbd; + PREDICTION_MODE best_mode = -1, mode; + unsigned int best_err = INT_MAX; + + // calculate SATD for each intra prediction mode; + // we're intentionally not doing 4x4, we just want a rough estimate + for (mode = DC_PRED; mode <= TM_PRED; mode++) { + unsigned int err; + + xd->mi[0]->mbmi.mode = mode; + av1_predict_intra_block(xd, 16, 16, BLOCK_16X16, mode, x->plane[0].src.buf, + x->plane[0].src.stride, xd->plane[0].dst.buf, + xd->plane[0].dst.stride, 0, 0, 0); + err = aom_sad16x16(x->plane[0].src.buf, x->plane[0].src.stride, + xd->plane[0].dst.buf, xd->plane[0].dst.stride); + + // find best + if (err < best_err) { + best_err = err; + best_mode = mode; + } + } + + if (pbest_mode) *pbest_mode = best_mode; + + return best_err; +} + +static void update_mbgraph_mb_stats(AV1_COMP *cpi, MBGRAPH_MB_STATS *stats, + YV12_BUFFER_CONFIG *buf, int mb_y_offset, + YV12_BUFFER_CONFIG *golden_ref, + const MV *prev_golden_ref_mv, + YV12_BUFFER_CONFIG *alt_ref, int mb_row, + int mb_col) { + MACROBLOCK *const x = &cpi->td.mb; + MACROBLOCKD *const xd = &x->e_mbd; + int intra_error; + AV1_COMMON *cm = &cpi->common; + + // FIXME in practice we're completely ignoring chroma here + x->plane[0].src.buf = buf->y_buffer + mb_y_offset; + x->plane[0].src.stride = buf->y_stride; + + xd->plane[0].dst.buf = get_frame_new_buffer(cm)->y_buffer + mb_y_offset; + xd->plane[0].dst.stride = get_frame_new_buffer(cm)->y_stride; + + // do intra 16x16 prediction + intra_error = find_best_16x16_intra(cpi, &stats->ref[INTRA_FRAME].m.mode); + if (intra_error <= 0) intra_error = 1; + stats->ref[INTRA_FRAME].err = intra_error; + + // Golden frame MV search, if it exists and is different than last frame + if (golden_ref) { + int g_motion_error; + xd->plane[0].pre[0].buf = golden_ref->y_buffer + mb_y_offset; + xd->plane[0].pre[0].stride = golden_ref->y_stride; + g_motion_error = + do_16x16_motion_search(cpi, prev_golden_ref_mv, mb_row, mb_col); + stats->ref[GOLDEN_FRAME].m.mv = x->best_mv; + stats->ref[GOLDEN_FRAME].err = g_motion_error; + } else { + stats->ref[GOLDEN_FRAME].err = INT_MAX; + stats->ref[GOLDEN_FRAME].m.mv.as_int = 0; + } + + // Do an Alt-ref frame MV search, if it exists and is different than + // last/golden frame. + if (alt_ref) { + int a_motion_error; + xd->plane[0].pre[0].buf = alt_ref->y_buffer + mb_y_offset; + xd->plane[0].pre[0].stride = alt_ref->y_stride; + a_motion_error = + do_16x16_zerozero_search(cpi, &stats->ref[ALTREF_FRAME].m.mv); + + stats->ref[ALTREF_FRAME].err = a_motion_error; + } else { + stats->ref[ALTREF_FRAME].err = INT_MAX; + stats->ref[ALTREF_FRAME].m.mv.as_int = 0; + } +} + +static void update_mbgraph_frame_stats(AV1_COMP *cpi, + MBGRAPH_FRAME_STATS *stats, + YV12_BUFFER_CONFIG *buf, + YV12_BUFFER_CONFIG *golden_ref, + YV12_BUFFER_CONFIG *alt_ref) { + MACROBLOCK *const x = &cpi->td.mb; + MACROBLOCKD *const xd = &x->e_mbd; + AV1_COMMON *const cm = &cpi->common; + + int mb_col, mb_row, offset = 0; + int mb_y_offset = 0, arf_y_offset = 0, gld_y_offset = 0; + MV gld_top_mv = { 0, 0 }; + MODE_INFO mi_local; + + av1_zero(mi_local); + // Set up limit values for motion vectors to prevent them extending outside + // the UMV borders. + x->mv_limits.row_min = -BORDER_MV_PIXELS_B16; + x->mv_limits.row_max = (cm->mb_rows - 1) * 8 + BORDER_MV_PIXELS_B16; + xd->up_available = 0; + xd->plane[0].dst.stride = buf->y_stride; + xd->plane[0].pre[0].stride = buf->y_stride; + xd->plane[1].dst.stride = buf->uv_stride; + xd->mi[0] = &mi_local; + mi_local.mbmi.sb_type = BLOCK_16X16; + mi_local.mbmi.ref_frame[0] = LAST_FRAME; + mi_local.mbmi.ref_frame[1] = NONE_FRAME; + + for (mb_row = 0; mb_row < cm->mb_rows; mb_row++) { + MV gld_left_mv = gld_top_mv; + int mb_y_in_offset = mb_y_offset; + int arf_y_in_offset = arf_y_offset; + int gld_y_in_offset = gld_y_offset; + + // Set up limit values for motion vectors to prevent them extending outside + // the UMV borders. + x->mv_limits.col_min = -BORDER_MV_PIXELS_B16; + x->mv_limits.col_max = (cm->mb_cols - 1) * 8 + BORDER_MV_PIXELS_B16; + xd->left_available = 0; + + for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) { + MBGRAPH_MB_STATS *mb_stats = &stats->mb_stats[offset + mb_col]; + + update_mbgraph_mb_stats(cpi, mb_stats, buf, mb_y_in_offset, golden_ref, + &gld_left_mv, alt_ref, mb_row, mb_col); + gld_left_mv = mb_stats->ref[GOLDEN_FRAME].m.mv.as_mv; + if (mb_col == 0) { + gld_top_mv = gld_left_mv; + } + xd->left_available = 1; + mb_y_in_offset += 16; + gld_y_in_offset += 16; + arf_y_in_offset += 16; + x->mv_limits.col_min -= 16; + x->mv_limits.col_max -= 16; + } + xd->up_available = 1; + mb_y_offset += buf->y_stride * 16; + gld_y_offset += golden_ref->y_stride * 16; + if (alt_ref) arf_y_offset += alt_ref->y_stride * 16; + x->mv_limits.row_min -= 16; + x->mv_limits.row_max -= 16; + offset += cm->mb_cols; + } +} + +// void separate_arf_mbs_byzz +static void separate_arf_mbs(AV1_COMP *cpi) { + AV1_COMMON *const cm = &cpi->common; + int mb_col, mb_row, offset, i; + int mi_row, mi_col; + int ncnt[4] = { 0 }; + int n_frames = cpi->mbgraph_n_frames; + + int *arf_not_zz; + + CHECK_MEM_ERROR( + cm, arf_not_zz, + aom_calloc(cm->mb_rows * cm->mb_cols * sizeof(*arf_not_zz), 1)); + + // We are not interested in results beyond the alt ref itself. + if (n_frames > cpi->rc.frames_till_gf_update_due) + n_frames = cpi->rc.frames_till_gf_update_due; + + // defer cost to reference frames + for (i = n_frames - 1; i >= 0; i--) { + MBGRAPH_FRAME_STATS *frame_stats = &cpi->mbgraph_stats[i]; + + for (offset = 0, mb_row = 0; mb_row < cm->mb_rows; + offset += cm->mb_cols, mb_row++) { + for (mb_col = 0; mb_col < cm->mb_cols; mb_col++) { + MBGRAPH_MB_STATS *mb_stats = &frame_stats->mb_stats[offset + mb_col]; + + int altref_err = mb_stats->ref[ALTREF_FRAME].err; + int intra_err = mb_stats->ref[INTRA_FRAME].err; + int golden_err = mb_stats->ref[GOLDEN_FRAME].err; + + // Test for altref vs intra and gf and that its mv was 0,0. + if (altref_err > 1000 || altref_err > intra_err || + altref_err > golden_err) { + arf_not_zz[offset + mb_col]++; + } + } + } + } + + // arf_not_zz is indexed by MB, but this loop is indexed by MI to avoid out + // of bound access in segmentation_map + for (mi_row = 0; mi_row < cm->mi_rows; mi_row++) { + for (mi_col = 0; mi_col < cm->mi_cols; mi_col++) { + // If any of the blocks in the sequence failed then the MB + // goes in segment 0 + if (arf_not_zz[mi_row / 2 * cm->mb_cols + mi_col / 2]) { + ncnt[0]++; + cpi->segmentation_map[mi_row * cm->mi_cols + mi_col] = 0; + } else { + cpi->segmentation_map[mi_row * cm->mi_cols + mi_col] = 1; + ncnt[1]++; + } + } + } + + // Only bother with segmentation if over 10% of the MBs in static segment + // if ( ncnt[1] && (ncnt[0] / ncnt[1] < 10) ) + if (1) { + // Note % of blocks that are marked as static + if (cm->MBs) + cpi->static_mb_pct = (ncnt[1] * 100) / (cm->mi_rows * cm->mi_cols); + + // This error case should not be reachable as this function should + // never be called with the common data structure uninitialized. + else + cpi->static_mb_pct = 0; + + av1_enable_segmentation(&cm->seg); + } else { + cpi->static_mb_pct = 0; + av1_disable_segmentation(&cm->seg); + } + + // Free localy allocated storage + aom_free(arf_not_zz); +} + +void av1_update_mbgraph_stats(AV1_COMP *cpi) { + AV1_COMMON *const cm = &cpi->common; + int i, n_frames = av1_lookahead_depth(cpi->lookahead); + YV12_BUFFER_CONFIG *golden_ref = get_ref_frame_buffer(cpi, GOLDEN_FRAME); + + assert(golden_ref != NULL); + + // we need to look ahead beyond where the ARF transitions into + // being a GF - so exit if we don't look ahead beyond that + if (n_frames <= cpi->rc.frames_till_gf_update_due) return; + + if (n_frames > MAX_LAG_BUFFERS) n_frames = MAX_LAG_BUFFERS; + + cpi->mbgraph_n_frames = n_frames; + for (i = 0; i < n_frames; i++) { + MBGRAPH_FRAME_STATS *frame_stats = &cpi->mbgraph_stats[i]; + memset(frame_stats->mb_stats, 0, + cm->mb_rows * cm->mb_cols * sizeof(*cpi->mbgraph_stats[i].mb_stats)); + } + + // do motion search to find contribution of each reference to data + // later on in this GF group + // FIXME really, the GF/last MC search should be done forward, and + // the ARF MC search backwards, to get optimal results for MV caching + for (i = 0; i < n_frames; i++) { + MBGRAPH_FRAME_STATS *frame_stats = &cpi->mbgraph_stats[i]; + struct lookahead_entry *q_cur = av1_lookahead_peek(cpi->lookahead, i); + + assert(q_cur != NULL); + + update_mbgraph_frame_stats(cpi, frame_stats, &q_cur->img, golden_ref, + cpi->source); + } + + aom_clear_system_state(); + + separate_arf_mbs(cpi); +} |