Merge pull request #850 from trav90/add-av1-support

Add initial support for AV1 video.

1 files changed, 360 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/pred_common.h b/third_party/aom/av1/common/pred_common.h
new file mode 100644
index 000000000..6dba2322d
--- /dev/null
+++ b/third_party/aom/av1/common/pred_common.h
@@ -0,0 +1,360 @@
+/*
+ * 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.
+ */
+
+#ifndef AOM_AV1_COMMON_PRED_COMMON_H_
+#define AOM_AV1_COMMON_PRED_COMMON_H_
+
+#include "av1/common/blockd.h"
+#include "av1/common/mvref_common.h"
+#include "av1/common/onyxc_int.h"
+#include "aom_dsp/aom_dsp_common.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+static INLINE int get_segment_id(const AV1_COMMON *const cm,
+                                 const uint8_t *segment_ids, BLOCK_SIZE bsize,
+                                 int mi_row, int mi_col) {
+  const int mi_offset = mi_row * cm->mi_cols + mi_col;
+  const int bw = mi_size_wide[bsize];
+  const int bh = mi_size_high[bsize];
+  const int xmis = AOMMIN(cm->mi_cols - mi_col, bw);
+  const int ymis = AOMMIN(cm->mi_rows - mi_row, bh);
+  int x, y, segment_id = MAX_SEGMENTS;
+
+  for (y = 0; y < ymis; ++y)
+    for (x = 0; x < xmis; ++x)
+      segment_id =
+          AOMMIN(segment_id, segment_ids[mi_offset + y * cm->mi_cols + x]);
+
+  assert(segment_id >= 0 && segment_id < MAX_SEGMENTS);
+  return segment_id;
+}
+
+static INLINE int av1_get_spatial_seg_pred(const AV1_COMMON *const cm,
+                                           const MACROBLOCKD *const xd,
+                                           int mi_row, int mi_col,
+                                           int *cdf_index) {
+  int prev_ul = -1;  // top left segment_id
+  int prev_l = -1;   // left segment_id
+  int prev_u = -1;   // top segment_id
+  if ((xd->up_available) && (xd->left_available)) {
+    prev_ul = get_segment_id(cm, cm->current_frame_seg_map, BLOCK_4X4,
+                             mi_row - 1, mi_col - 1);
+  }
+  if (xd->up_available) {
+    prev_u = get_segment_id(cm, cm->current_frame_seg_map, BLOCK_4X4,
+                            mi_row - 1, mi_col - 0);
+  }
+  if (xd->left_available) {
+    prev_l = get_segment_id(cm, cm->current_frame_seg_map, BLOCK_4X4,
+                            mi_row - 0, mi_col - 1);
+  }
+
+  // Pick CDF index based on number of matching/out-of-bounds segment IDs.
+  if (prev_ul < 0 || prev_u < 0 || prev_l < 0) /* Edge case */
+    *cdf_index = 0;
+  else if ((prev_ul == prev_u) && (prev_ul == prev_l))
+    *cdf_index = 2;
+  else if ((prev_ul == prev_u) || (prev_ul == prev_l) || (prev_u == prev_l))
+    *cdf_index = 1;
+  else
+    *cdf_index = 0;
+
+  // If 2 or more are identical returns that as predictor, otherwise prev_l.
+  if (prev_u == -1)  // edge case
+    return prev_l == -1 ? 0 : prev_l;
+  if (prev_l == -1)  // edge case
+    return prev_u;
+  return (prev_ul == prev_u) ? prev_u : prev_l;
+}
+
+static INLINE int av1_get_pred_context_seg_id(const MACROBLOCKD *xd) {
+  const MB_MODE_INFO *const above_mi = xd->above_mbmi;
+  const MB_MODE_INFO *const left_mi = xd->left_mbmi;
+  const int above_sip = (above_mi != NULL) ? above_mi->seg_id_predicted : 0;
+  const int left_sip = (left_mi != NULL) ? left_mi->seg_id_predicted : 0;
+
+  return above_sip + left_sip;
+}
+
+static INLINE int get_comp_index_context(const AV1_COMMON *cm,
+                                         const MACROBLOCKD *xd) {
+  MB_MODE_INFO *mbmi = xd->mi[0];
+  int bck_idx = cm->frame_refs[mbmi->ref_frame[0] - LAST_FRAME].idx;
+  int fwd_idx = cm->frame_refs[mbmi->ref_frame[1] - LAST_FRAME].idx;
+  int bck_frame_index = 0, fwd_frame_index = 0;
+  int cur_frame_index = cm->cur_frame->cur_frame_offset;
+
+  if (bck_idx >= 0)
+    bck_frame_index = cm->buffer_pool->frame_bufs[bck_idx].cur_frame_offset;
+
+  if (fwd_idx >= 0)
+    fwd_frame_index = cm->buffer_pool->frame_bufs[fwd_idx].cur_frame_offset;
+  int fwd = abs(get_relative_dist(cm, fwd_frame_index, cur_frame_index));
+  int bck = abs(get_relative_dist(cm, cur_frame_index, bck_frame_index));
+
+  const MB_MODE_INFO *const above_mi = xd->above_mbmi;
+  const MB_MODE_INFO *const left_mi = xd->left_mbmi;
+
+  int above_ctx = 0, left_ctx = 0;
+  const int offset = (fwd == bck);
+
+  if (above_mi) {
+    if (has_second_ref(above_mi))
+      above_ctx = above_mi->compound_idx;
+    else if (above_mi->ref_frame[0] == ALTREF_FRAME)
+      above_ctx = 1;
+  }
+
+  if (left_mi) {
+    if (has_second_ref(left_mi))
+      left_ctx = left_mi->compound_idx;
+    else if (left_mi->ref_frame[0] == ALTREF_FRAME)
+      left_ctx = 1;
+  }
+
+  return above_ctx + left_ctx + 3 * offset;
+}
+
+static INLINE int get_comp_group_idx_context(const MACROBLOCKD *xd) {
+  const MB_MODE_INFO *const above_mi = xd->above_mbmi;
+  const MB_MODE_INFO *const left_mi = xd->left_mbmi;
+  int above_ctx = 0, left_ctx = 0;
+
+  if (above_mi) {
+    if (has_second_ref(above_mi))
+      above_ctx = above_mi->comp_group_idx;
+    else if (above_mi->ref_frame[0] == ALTREF_FRAME)
+      above_ctx = 3;
+  }
+  if (left_mi) {
+    if (has_second_ref(left_mi))
+      left_ctx = left_mi->comp_group_idx;
+    else if (left_mi->ref_frame[0] == ALTREF_FRAME)
+      left_ctx = 3;
+  }
+
+  return AOMMIN(5, above_ctx + left_ctx);
+}
+
+static INLINE aom_cdf_prob *av1_get_pred_cdf_seg_id(
+    struct segmentation_probs *segp, const MACROBLOCKD *xd) {
+  return segp->pred_cdf[av1_get_pred_context_seg_id(xd)];
+}
+
+static INLINE int av1_get_skip_mode_context(const MACROBLOCKD *xd) {
+  const MB_MODE_INFO *const above_mi = xd->above_mbmi;
+  const MB_MODE_INFO *const left_mi = xd->left_mbmi;
+  const int above_skip_mode = above_mi ? above_mi->skip_mode : 0;
+  const int left_skip_mode = left_mi ? left_mi->skip_mode : 0;
+  return above_skip_mode + left_skip_mode;
+}
+
+static INLINE int av1_get_skip_context(const MACROBLOCKD *xd) {
+  const MB_MODE_INFO *const above_mi = xd->above_mbmi;
+  const MB_MODE_INFO *const left_mi = xd->left_mbmi;
+  const int above_skip = above_mi ? above_mi->skip : 0;
+  const int left_skip = left_mi ? left_mi->skip : 0;
+  return above_skip + left_skip;
+}
+
+int av1_get_pred_context_switchable_interp(const MACROBLOCKD *xd, int dir);
+
+// Get a list of palette base colors that are used in the above and left blocks,
+// referred to as "color cache". The return value is the number of colors in the
+// cache (<= 2 * PALETTE_MAX_SIZE). The color values are stored in "cache"
+// in ascending order.
+int av1_get_palette_cache(const MACROBLOCKD *const xd, int plane,
+                          uint16_t *cache);
+
+static INLINE int av1_get_palette_bsize_ctx(BLOCK_SIZE bsize) {
+  return num_pels_log2_lookup[bsize] - num_pels_log2_lookup[BLOCK_8X8];
+}
+
+static INLINE int av1_get_palette_mode_ctx(const MACROBLOCKD *xd) {
+  const MB_MODE_INFO *const above_mi = xd->above_mbmi;
+  const MB_MODE_INFO *const left_mi = xd->left_mbmi;
+  int ctx = 0;
+  if (above_mi) ctx += (above_mi->palette_mode_info.palette_size[0] > 0);
+  if (left_mi) ctx += (left_mi->palette_mode_info.palette_size[0] > 0);
+  return ctx;
+}
+
+int av1_get_intra_inter_context(const MACROBLOCKD *xd);
+
+int av1_get_reference_mode_context(const MACROBLOCKD *xd);
+
+static INLINE aom_cdf_prob *av1_get_reference_mode_cdf(const MACROBLOCKD *xd) {
+  return xd->tile_ctx->comp_inter_cdf[av1_get_reference_mode_context(xd)];
+}
+
+int av1_get_comp_reference_type_context(const MACROBLOCKD *xd);
+
+// == Uni-directional contexts ==
+
+int av1_get_pred_context_uni_comp_ref_p(const MACROBLOCKD *xd);
+
+int av1_get_pred_context_uni_comp_ref_p1(const MACROBLOCKD *xd);
+
+int av1_get_pred_context_uni_comp_ref_p2(const MACROBLOCKD *xd);
+
+static INLINE aom_cdf_prob *av1_get_comp_reference_type_cdf(
+    const MACROBLOCKD *xd) {
+  const int pred_context = av1_get_comp_reference_type_context(xd);
+  return xd->tile_ctx->comp_ref_type_cdf[pred_context];
+}
+
+static INLINE aom_cdf_prob *av1_get_pred_cdf_uni_comp_ref_p(
+    const MACROBLOCKD *xd) {
+  const int pred_context = av1_get_pred_context_uni_comp_ref_p(xd);
+  return xd->tile_ctx->uni_comp_ref_cdf[pred_context][0];
+}
+
+static INLINE aom_cdf_prob *av1_get_pred_cdf_uni_comp_ref_p1(
+    const MACROBLOCKD *xd) {
+  const int pred_context = av1_get_pred_context_uni_comp_ref_p1(xd);
+  return xd->tile_ctx->uni_comp_ref_cdf[pred_context][1];
+}
+
+static INLINE aom_cdf_prob *av1_get_pred_cdf_uni_comp_ref_p2(
+    const MACROBLOCKD *xd) {
+  const int pred_context = av1_get_pred_context_uni_comp_ref_p2(xd);
+  return xd->tile_ctx->uni_comp_ref_cdf[pred_context][2];
+}
+
+// == Bi-directional contexts ==
+
+int av1_get_pred_context_comp_ref_p(const MACROBLOCKD *xd);
+
+int av1_get_pred_context_comp_ref_p1(const MACROBLOCKD *xd);
+
+int av1_get_pred_context_comp_ref_p2(const MACROBLOCKD *xd);
+
+int av1_get_pred_context_comp_bwdref_p(const MACROBLOCKD *xd);
+
+int av1_get_pred_context_comp_bwdref_p1(const MACROBLOCKD *xd);
+
+static INLINE aom_cdf_prob *av1_get_pred_cdf_comp_ref_p(const MACROBLOCKD *xd) {
+  const int pred_context = av1_get_pred_context_comp_ref_p(xd);
+  return xd->tile_ctx->comp_ref_cdf[pred_context][0];
+}
+
+static INLINE aom_cdf_prob *av1_get_pred_cdf_comp_ref_p1(
+    const MACROBLOCKD *xd) {
+  const int pred_context = av1_get_pred_context_comp_ref_p1(xd);
+  return xd->tile_ctx->comp_ref_cdf[pred_context][1];
+}
+
+static INLINE aom_cdf_prob *av1_get_pred_cdf_comp_ref_p2(
+    const MACROBLOCKD *xd) {
+  const int pred_context = av1_get_pred_context_comp_ref_p2(xd);
+  return xd->tile_ctx->comp_ref_cdf[pred_context][2];
+}
+
+static INLINE aom_cdf_prob *av1_get_pred_cdf_comp_bwdref_p(
+    const MACROBLOCKD *xd) {
+  const int pred_context = av1_get_pred_context_comp_bwdref_p(xd);
+  return xd->tile_ctx->comp_bwdref_cdf[pred_context][0];
+}
+
+static INLINE aom_cdf_prob *av1_get_pred_cdf_comp_bwdref_p1(
+    const MACROBLOCKD *xd) {
+  const int pred_context = av1_get_pred_context_comp_bwdref_p1(xd);
+  return xd->tile_ctx->comp_bwdref_cdf[pred_context][1];
+}
+
+// == Single contexts ==
+
+int av1_get_pred_context_single_ref_p1(const MACROBLOCKD *xd);
+
+int av1_get_pred_context_single_ref_p2(const MACROBLOCKD *xd);
+
+int av1_get_pred_context_single_ref_p3(const MACROBLOCKD *xd);
+
+int av1_get_pred_context_single_ref_p4(const MACROBLOCKD *xd);
+
+int av1_get_pred_context_single_ref_p5(const MACROBLOCKD *xd);
+
+int av1_get_pred_context_single_ref_p6(const MACROBLOCKD *xd);
+
+static INLINE aom_cdf_prob *av1_get_pred_cdf_single_ref_p1(
+    const MACROBLOCKD *xd) {
+  return xd->tile_ctx
+      ->single_ref_cdf[av1_get_pred_context_single_ref_p1(xd)][0];
+}
+static INLINE aom_cdf_prob *av1_get_pred_cdf_single_ref_p2(
+    const MACROBLOCKD *xd) {
+  return xd->tile_ctx
+      ->single_ref_cdf[av1_get_pred_context_single_ref_p2(xd)][1];
+}
+static INLINE aom_cdf_prob *av1_get_pred_cdf_single_ref_p3(
+    const MACROBLOCKD *xd) {
+  return xd->tile_ctx
+      ->single_ref_cdf[av1_get_pred_context_single_ref_p3(xd)][2];
+}
+static INLINE aom_cdf_prob *av1_get_pred_cdf_single_ref_p4(
+    const MACROBLOCKD *xd) {
+  return xd->tile_ctx
+      ->single_ref_cdf[av1_get_pred_context_single_ref_p4(xd)][3];
+}
+static INLINE aom_cdf_prob *av1_get_pred_cdf_single_ref_p5(
+    const MACROBLOCKD *xd) {
+  return xd->tile_ctx
+      ->single_ref_cdf[av1_get_pred_context_single_ref_p5(xd)][4];
+}
+static INLINE aom_cdf_prob *av1_get_pred_cdf_single_ref_p6(
+    const MACROBLOCKD *xd) {
+  return xd->tile_ctx
+      ->single_ref_cdf[av1_get_pred_context_single_ref_p6(xd)][5];
+}
+
+// Returns a context number for the given MB prediction signal
+// The mode info data structure has a one element border above and to the
+// left of the entries corresponding to real blocks.
+// The prediction flags in these dummy entries are initialized to 0.
+static INLINE int get_tx_size_context(const MACROBLOCKD *xd) {
+  const MB_MODE_INFO *mbmi = xd->mi[0];
+  const MB_MODE_INFO *const above_mbmi = xd->above_mbmi;
+  const MB_MODE_INFO *const left_mbmi = xd->left_mbmi;
+  const TX_SIZE max_tx_size = max_txsize_rect_lookup[mbmi->sb_type];
+  const int max_tx_wide = tx_size_wide[max_tx_size];
+  const int max_tx_high = tx_size_high[max_tx_size];
+  const int has_above = xd->up_available;
+  const int has_left = xd->left_available;
+
+  int above = xd->above_txfm_context[0] >= max_tx_wide;
+  int left = xd->left_txfm_context[0] >= max_tx_high;
+
+  if (has_above)
+    if (is_inter_block(above_mbmi))
+      above = block_size_wide[above_mbmi->sb_type] >= max_tx_wide;
+
+  if (has_left)
+    if (is_inter_block(left_mbmi))
+      left = block_size_high[left_mbmi->sb_type] >= max_tx_high;
+
+  if (has_above && has_left)
+    return (above + left);
+  else if (has_above)
+    return above;
+  else if (has_left)
+    return left;
+  else
+    return 0;
+}
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AOM_AV1_COMMON_PRED_COMMON_H_