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Diffstat (limited to 'media/libvpx/libvpx/vp9/encoder/vp9_encodemv.c')
-rw-r--r--media/libvpx/libvpx/vp9/encoder/vp9_encodemv.c271
1 files changed, 271 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp9/encoder/vp9_encodemv.c b/media/libvpx/libvpx/vp9/encoder/vp9_encodemv.c
new file mode 100644
index 0000000000..023d087c2c
--- /dev/null
+++ b/media/libvpx/libvpx/vp9/encoder/vp9_encodemv.c
@@ -0,0 +1,271 @@
+/*
+ * 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 <math.h>
+
+#include "vp9/common/vp9_common.h"
+#include "vp9/common/vp9_entropymode.h"
+
+#include "vp9/encoder/vp9_cost.h"
+#include "vp9/encoder/vp9_encodemv.h"
+
+#include "vpx_dsp/vpx_dsp_common.h"
+
+static struct vp9_token mv_joint_encodings[MV_JOINTS];
+static struct vp9_token mv_class_encodings[MV_CLASSES];
+static struct vp9_token mv_fp_encodings[MV_FP_SIZE];
+
+void vp9_entropy_mv_init(void) {
+ vp9_tokens_from_tree(mv_joint_encodings, vp9_mv_joint_tree);
+ vp9_tokens_from_tree(mv_class_encodings, vp9_mv_class_tree);
+ vp9_tokens_from_tree(mv_fp_encodings, vp9_mv_fp_tree);
+}
+
+static void encode_mv_component(vpx_writer *w, int comp,
+ const nmv_component *mvcomp, int usehp) {
+ int offset;
+ const int sign = comp < 0;
+ const int mag = sign ? -comp : comp;
+ const int mv_class = vp9_get_mv_class(mag - 1, &offset);
+ const int d = offset >> 3; // int mv data
+ const int fr = (offset >> 1) & 3; // fractional mv data
+ const int hp = offset & 1; // high precision mv data
+
+ assert(comp != 0);
+
+ // Sign
+ vpx_write(w, sign, mvcomp->sign);
+
+ // Class
+ vp9_write_token(w, vp9_mv_class_tree, mvcomp->classes,
+ &mv_class_encodings[mv_class]);
+
+ // Integer bits
+ if (mv_class == MV_CLASS_0) {
+ vpx_write(w, d, mvcomp->class0[0]);
+ } else {
+ int i;
+ const int n = mv_class + CLASS0_BITS - 1; // number of bits
+ for (i = 0; i < n; ++i) vpx_write(w, (d >> i) & 1, mvcomp->bits[i]);
+ }
+
+ // Fractional bits
+ vp9_write_token(w, vp9_mv_fp_tree,
+ mv_class == MV_CLASS_0 ? mvcomp->class0_fp[d] : mvcomp->fp,
+ &mv_fp_encodings[fr]);
+
+ // High precision bit
+ if (usehp)
+ vpx_write(w, hp, mv_class == MV_CLASS_0 ? mvcomp->class0_hp : mvcomp->hp);
+}
+
+static void build_nmv_component_cost_table(int *mvcost,
+ const nmv_component *const mvcomp,
+ int usehp) {
+ int sign_cost[2], class_cost[MV_CLASSES], class0_cost[CLASS0_SIZE];
+ int bits_cost[MV_OFFSET_BITS][2];
+ int class0_fp_cost[CLASS0_SIZE][MV_FP_SIZE], fp_cost[MV_FP_SIZE];
+ int class0_hp_cost[2], hp_cost[2];
+ int i;
+ int c, o;
+
+ sign_cost[0] = vp9_cost_zero(mvcomp->sign);
+ sign_cost[1] = vp9_cost_one(mvcomp->sign);
+ vp9_cost_tokens(class_cost, mvcomp->classes, vp9_mv_class_tree);
+ vp9_cost_tokens(class0_cost, mvcomp->class0, vp9_mv_class0_tree);
+ for (i = 0; i < MV_OFFSET_BITS; ++i) {
+ bits_cost[i][0] = vp9_cost_zero(mvcomp->bits[i]);
+ bits_cost[i][1] = vp9_cost_one(mvcomp->bits[i]);
+ }
+
+ for (i = 0; i < CLASS0_SIZE; ++i)
+ vp9_cost_tokens(class0_fp_cost[i], mvcomp->class0_fp[i], vp9_mv_fp_tree);
+ vp9_cost_tokens(fp_cost, mvcomp->fp, vp9_mv_fp_tree);
+
+ // Always build the hp costs to avoid an uninitialized warning from gcc
+ class0_hp_cost[0] = vp9_cost_zero(mvcomp->class0_hp);
+ class0_hp_cost[1] = vp9_cost_one(mvcomp->class0_hp);
+ hp_cost[0] = vp9_cost_zero(mvcomp->hp);
+ hp_cost[1] = vp9_cost_one(mvcomp->hp);
+
+ mvcost[0] = 0;
+ // MV_CLASS_0
+ for (o = 0; o < (CLASS0_SIZE << 3); ++o) {
+ int d, e, f;
+ int cost = class_cost[MV_CLASS_0];
+ int v = o + 1;
+ d = (o >> 3); /* int mv data */
+ f = (o >> 1) & 3; /* fractional pel mv data */
+ cost += class0_cost[d];
+ cost += class0_fp_cost[d][f];
+ if (usehp) {
+ e = (o & 1); /* high precision mv data */
+ cost += class0_hp_cost[e];
+ }
+ mvcost[v] = cost + sign_cost[0];
+ mvcost[-v] = cost + sign_cost[1];
+ }
+ for (c = MV_CLASS_1; c < MV_CLASSES; ++c) {
+ int d;
+ for (d = 0; d < (1 << c); ++d) {
+ int f;
+ int whole_cost = class_cost[c];
+ int b = c + CLASS0_BITS - 1; /* number of bits */
+ for (i = 0; i < b; ++i) whole_cost += bits_cost[i][((d >> i) & 1)];
+ for (f = 0; f < 4; ++f) {
+ int cost = whole_cost + fp_cost[f];
+ int v = (CLASS0_SIZE << (c + 2)) + d * 8 + f * 2 /* + e */ + 1;
+ if (usehp) {
+ mvcost[v] = cost + hp_cost[0] + sign_cost[0];
+ mvcost[-v] = cost + hp_cost[0] + sign_cost[1];
+ if (v + 1 > MV_MAX) break;
+ mvcost[v + 1] = cost + hp_cost[1] + sign_cost[0];
+ mvcost[-v - 1] = cost + hp_cost[1] + sign_cost[1];
+ } else {
+ mvcost[v] = cost + sign_cost[0];
+ mvcost[-v] = cost + sign_cost[1];
+ if (v + 1 > MV_MAX) break;
+ mvcost[v + 1] = cost + sign_cost[0];
+ mvcost[-v - 1] = cost + sign_cost[1];
+ }
+ }
+ }
+ }
+}
+
+static int update_mv(vpx_writer *w, const unsigned int ct[2], vpx_prob *cur_p,
+ vpx_prob upd_p) {
+ const vpx_prob new_p = get_binary_prob(ct[0], ct[1]) | 1;
+ const int update = cost_branch256(ct, *cur_p) + vp9_cost_zero(upd_p) >
+ cost_branch256(ct, new_p) + vp9_cost_one(upd_p) +
+ (7 << VP9_PROB_COST_SHIFT);
+ vpx_write(w, update, upd_p);
+ if (update) {
+ *cur_p = new_p;
+ vpx_write_literal(w, new_p >> 1, 7);
+ }
+ return update;
+}
+
+static void write_mv_update(const vpx_tree_index *tree,
+ vpx_prob probs[/*n - 1*/],
+ const unsigned int counts[/*n - 1*/], int n,
+ vpx_writer *w) {
+ int i;
+ unsigned int branch_ct[32][2];
+
+ // Assuming max number of probabilities <= 32
+ assert(n <= 32);
+
+ vp9_tree_probs_from_distribution(tree, branch_ct, counts);
+ for (i = 0; i < n - 1; ++i)
+ update_mv(w, branch_ct[i], &probs[i], MV_UPDATE_PROB);
+}
+
+void vp9_write_nmv_probs(VP9_COMMON *cm, int usehp, vpx_writer *w,
+ nmv_context_counts *const counts) {
+ int i, j;
+ nmv_context *const mvc = &cm->fc->nmvc;
+
+ write_mv_update(vp9_mv_joint_tree, mvc->joints, counts->joints, MV_JOINTS, w);
+
+ for (i = 0; i < 2; ++i) {
+ nmv_component *comp = &mvc->comps[i];
+ nmv_component_counts *comp_counts = &counts->comps[i];
+
+ update_mv(w, comp_counts->sign, &comp->sign, MV_UPDATE_PROB);
+ write_mv_update(vp9_mv_class_tree, comp->classes, comp_counts->classes,
+ MV_CLASSES, w);
+ write_mv_update(vp9_mv_class0_tree, comp->class0, comp_counts->class0,
+ CLASS0_SIZE, w);
+ for (j = 0; j < MV_OFFSET_BITS; ++j)
+ update_mv(w, comp_counts->bits[j], &comp->bits[j], MV_UPDATE_PROB);
+ }
+
+ for (i = 0; i < 2; ++i) {
+ for (j = 0; j < CLASS0_SIZE; ++j)
+ write_mv_update(vp9_mv_fp_tree, mvc->comps[i].class0_fp[j],
+ counts->comps[i].class0_fp[j], MV_FP_SIZE, w);
+
+ write_mv_update(vp9_mv_fp_tree, mvc->comps[i].fp, counts->comps[i].fp,
+ MV_FP_SIZE, w);
+ }
+
+ if (usehp) {
+ for (i = 0; i < 2; ++i) {
+ update_mv(w, counts->comps[i].class0_hp, &mvc->comps[i].class0_hp,
+ MV_UPDATE_PROB);
+ update_mv(w, counts->comps[i].hp, &mvc->comps[i].hp, MV_UPDATE_PROB);
+ }
+ }
+}
+
+void vp9_encode_mv(VP9_COMP *cpi, vpx_writer *w, const MV *mv, const MV *ref,
+ const nmv_context *mvctx, int usehp,
+ unsigned int *const max_mv_magnitude) {
+ const MV diff = { mv->row - ref->row, mv->col - ref->col };
+ const MV_JOINT_TYPE j = vp9_get_mv_joint(&diff);
+ usehp = usehp && use_mv_hp(ref);
+
+ vp9_write_token(w, vp9_mv_joint_tree, mvctx->joints, &mv_joint_encodings[j]);
+ if (mv_joint_vertical(j))
+ encode_mv_component(w, diff.row, &mvctx->comps[0], usehp);
+
+ if (mv_joint_horizontal(j))
+ encode_mv_component(w, diff.col, &mvctx->comps[1], usehp);
+
+ // If auto_mv_step_size is enabled then keep track of the largest
+ // motion vector component used.
+ if (cpi->sf.mv.auto_mv_step_size) {
+ const unsigned int maxv = VPXMAX(abs(mv->row), abs(mv->col)) >> 3;
+ *max_mv_magnitude = VPXMAX(maxv, *max_mv_magnitude);
+ }
+}
+
+void vp9_build_nmv_cost_table(int *mvjoint, int *mvcost[2],
+ const nmv_context *ctx, int usehp) {
+ vp9_cost_tokens(mvjoint, ctx->joints, vp9_mv_joint_tree);
+ build_nmv_component_cost_table(mvcost[0], &ctx->comps[0], usehp);
+ build_nmv_component_cost_table(mvcost[1], &ctx->comps[1], usehp);
+}
+
+static void inc_mvs(const MODE_INFO *mi, const MB_MODE_INFO_EXT *mbmi_ext,
+ const int_mv mvs[2], nmv_context_counts *counts) {
+ int i;
+
+ for (i = 0; i < 1 + has_second_ref(mi); ++i) {
+ const MV *ref = &mbmi_ext->ref_mvs[mi->ref_frame[i]][0].as_mv;
+ const MV diff = { mvs[i].as_mv.row - ref->row,
+ mvs[i].as_mv.col - ref->col };
+ vp9_inc_mv(&diff, counts);
+ }
+}
+
+void vp9_update_mv_count(ThreadData *td) {
+ const MACROBLOCKD *xd = &td->mb.e_mbd;
+ const MODE_INFO *mi = xd->mi[0];
+ const MB_MODE_INFO_EXT *mbmi_ext = td->mb.mbmi_ext;
+
+ if (mi->sb_type < BLOCK_8X8) {
+ const int num_4x4_w = num_4x4_blocks_wide_lookup[mi->sb_type];
+ const int num_4x4_h = num_4x4_blocks_high_lookup[mi->sb_type];
+ int idx, idy;
+
+ for (idy = 0; idy < 2; idy += num_4x4_h) {
+ for (idx = 0; idx < 2; idx += num_4x4_w) {
+ const int i = idy * 2 + idx;
+ if (mi->bmi[i].as_mode == NEWMV)
+ inc_mvs(mi, mbmi_ext, mi->bmi[i].as_mv, &td->counts->mv);
+ }
+ }
+ } else {
+ if (mi->mode == NEWMV) inc_mvs(mi, mbmi_ext, mi->mv, &td->counts->mv);
+ }
+}
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