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

Add initial support for AV1 video.

1 files changed, 104 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/seg_common.h b/third_party/aom/av1/common/seg_common.h
new file mode 100644
index 000000000..8c35bba86
--- /dev/null
+++ b/third_party/aom/av1/common/seg_common.h
@@ -0,0 +1,104 @@
+/*
+ * 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_SEG_COMMON_H_
+#define AOM_AV1_COMMON_SEG_COMMON_H_
+
+#include "aom_dsp/prob.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define MAX_SEGMENTS 8
+#define SEG_TREE_PROBS (MAX_SEGMENTS - 1)
+
+#define SEG_TEMPORAL_PRED_CTXS 3
+#define SPATIAL_PREDICTION_PROBS 3
+
+typedef enum {
+  SEG_LVL_ALT_Q,       // Use alternate Quantizer ....
+  SEG_LVL_ALT_LF_Y_V,  // Use alternate loop filter value on y plane vertical
+  SEG_LVL_ALT_LF_Y_H,  // Use alternate loop filter value on y plane horizontal
+  SEG_LVL_ALT_LF_U,    // Use alternate loop filter value on u plane
+  SEG_LVL_ALT_LF_V,    // Use alternate loop filter value on v plane
+  SEG_LVL_REF_FRAME,   // Optional Segment reference frame
+  SEG_LVL_SKIP,        // Optional Segment (0,0) + skip mode
+  SEG_LVL_GLOBALMV,
+  SEG_LVL_MAX
+} SEG_LVL_FEATURES;
+
+struct segmentation {
+  uint8_t enabled;
+  uint8_t update_map;
+  uint8_t update_data;
+  uint8_t temporal_update;
+
+  int16_t feature_data[MAX_SEGMENTS][SEG_LVL_MAX];
+  unsigned int feature_mask[MAX_SEGMENTS];
+  int last_active_segid;  // The highest numbered segment id that has some
+                          // enabled feature.
+  uint8_t segid_preskip;  // Whether the segment id will be read before the
+                          // skip syntax element.
+                          // 1: the segment id will be read first.
+                          // 0: the skip syntax element will be read first.
+};
+
+struct segmentation_probs {
+  aom_cdf_prob tree_cdf[CDF_SIZE(MAX_SEGMENTS)];
+  aom_cdf_prob pred_cdf[SEG_TEMPORAL_PRED_CTXS][CDF_SIZE(2)];
+  aom_cdf_prob spatial_pred_seg_cdf[SPATIAL_PREDICTION_PROBS]
+                                   [CDF_SIZE(MAX_SEGMENTS)];
+};
+
+static INLINE int segfeature_active(const struct segmentation *seg,
+                                    int segment_id,
+                                    SEG_LVL_FEATURES feature_id) {
+  return seg->enabled && (seg->feature_mask[segment_id] & (1 << feature_id));
+}
+
+static INLINE void segfeatures_copy(struct segmentation *dst,
+                                    const struct segmentation *src) {
+  int i, j;
+  for (i = 0; i < MAX_SEGMENTS; i++) {
+    dst->feature_mask[i] = src->feature_mask[i];
+    for (j = 0; j < SEG_LVL_MAX; j++) {
+      dst->feature_data[i][j] = src->feature_data[i][j];
+    }
+  }
+  dst->segid_preskip = src->segid_preskip;
+  dst->last_active_segid = src->last_active_segid;
+}
+
+void av1_clearall_segfeatures(struct segmentation *seg);
+
+void av1_enable_segfeature(struct segmentation *seg, int segment_id,
+                           SEG_LVL_FEATURES feature_id);
+
+void calculate_segdata(struct segmentation *seg);
+
+int av1_seg_feature_data_max(SEG_LVL_FEATURES feature_id);
+
+int av1_is_segfeature_signed(SEG_LVL_FEATURES feature_id);
+
+void av1_set_segdata(struct segmentation *seg, int segment_id,
+                     SEG_LVL_FEATURES feature_id, int seg_data);
+
+static INLINE int get_segdata(const struct segmentation *seg, int segment_id,
+                              SEG_LVL_FEATURES feature_id) {
+  return seg->feature_data[segment_id][feature_id];
+}
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // AOM_AV1_COMMON_SEG_COMMON_H_