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-rw-r--r--third_party/aom/av1/encoder/mbgraph.c401
1 files changed, 401 insertions, 0 deletions
diff --git a/third_party/aom/av1/encoder/mbgraph.c b/third_party/aom/av1/encoder/mbgraph.c
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+/*
+ * 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 "config/av1_rtcd.h"
+#include "config/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/common/blockd.h"
+#include "av1/common/reconinter.h"
+#include "av1/common/reconintra.h"
+#include "av1/encoder/mcomp.h"
+#include "av1/encoder/reconinter_enc.h"
+#include "av1/encoder/segmentation.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)
+ if (cpi->common.cur_frame_force_integer_mv == 1) {
+ x->best_mv.as_mv.row *= 8;
+ x->best_mv.as_mv.col *= 8;
+ } else {
+ int distortion;
+ unsigned int sse;
+ cpi->find_fractional_mv_step(
+ x, &cpi->common, mb_row, mb_col, 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, NULL, 0, 0, 0, 0, 0);
+ }
+
+ if (has_second_ref(xd->mi[0]))
+ xd->mi[0]->mode = NEW_NEWMV;
+ else
+ xd->mi[0]->mode = NEWMV;
+
+ xd->mi[0]->mv[0] = x->best_mv;
+ xd->mi[0]->ref_frame[1] = NONE_FRAME;
+
+ av1_build_inter_predictors_sby(&cpi->common, 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 = kZeroMv;
+
+ 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) {
+ const AV1_COMMON *cm = &cpi->common;
+ 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 = INTRA_MODE_START; mode < INTRA_MODE_END; mode++) {
+ unsigned int err;
+
+ xd->mi[0]->mode = mode;
+ av1_predict_intra_block(cm, xd, 16, 16, TX_16X16, mode, 0, 0,
+ FILTER_INTRA_MODES, 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 = kZeroMv;
+ MB_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.sb_type = BLOCK_16X16;
+ mi_local.ref_frame[0] = LAST_FRAME;
+ mi_local.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);
+}
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