1 files changed, 75 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp9/encoder/vp9_aq_360.c b/media/libvpx/libvpx/vp9/encoder/vp9_aq_360.c
new file mode 100644
index 0000000000..dba017ffcc
--- /dev/null
+++ b/media/libvpx/libvpx/vp9/encoder/vp9_aq_360.c
@@ -0,0 +1,75 @@
+/*
+ *  Copyright (c) 2013 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 "vpx_ports/mem.h"
+#include "vpx_ports/system_state.h"
+
+#include "vp9/encoder/vp9_aq_360.h"
+#include "vp9/encoder/vp9_aq_variance.h"
+
+#include "vp9/common/vp9_seg_common.h"
+
+#include "vp9/encoder/vp9_ratectrl.h"
+#include "vp9/encoder/vp9_rd.h"
+#include "vp9/encoder/vp9_segmentation.h"
+
+static const double rate_ratio[MAX_SEGMENTS] = { 1.0, 0.75, 0.6, 0.5,
+                                                 0.4, 0.3,  0.25 };
+
+// Sets segment id 0 for the equatorial region, 1 for temperate region
+// and 2 for the polar regions
+unsigned int vp9_360aq_segment_id(int mi_row, int mi_rows) {
+  if (mi_row < mi_rows / 8 || mi_row > mi_rows - mi_rows / 8)
+    return 2;
+  else if (mi_row < mi_rows / 4 || mi_row > mi_rows - mi_rows / 4)
+    return 1;
+  else
+    return 0;
+}
+
+void vp9_360aq_frame_setup(VP9_COMP *cpi) {
+  VP9_COMMON *cm = &cpi->common;
+  struct segmentation *seg = &cm->seg;
+  int i;
+
+  if (frame_is_intra_only(cm) || cpi->force_update_segmentation ||
+      cm->error_resilient_mode) {
+    vp9_enable_segmentation(seg);
+    vp9_clearall_segfeatures(seg);
+
+    seg->abs_delta = SEGMENT_DELTADATA;
+
+    vpx_clear_system_state();
+
+    for (i = 0; i < MAX_SEGMENTS; ++i) {
+      int qindex_delta =
+          vp9_compute_qdelta_by_rate(&cpi->rc, cm->frame_type, cm->base_qindex,
+                                     rate_ratio[i], cm->bit_depth);
+
+      // We don't allow qindex 0 in a segment if the base value is not 0.
+      // Q index 0 (lossless) implies 4x4 encoding only and in AQ mode a segment
+      // Q delta is sometimes applied without going back around the rd loop.
+      // This could lead to an illegal combination of partition size and q.
+      if ((cm->base_qindex != 0) && ((cm->base_qindex + qindex_delta) == 0)) {
+        qindex_delta = -cm->base_qindex + 1;
+      }
+
+      // No need to enable SEG_LVL_ALT_Q for this segment.
+      if (rate_ratio[i] == 1.0) {
+        continue;
+      }
+
+      vp9_set_segdata(seg, i, SEG_LVL_ALT_Q, qindex_delta);
+      vp9_enable_segfeature(seg, i, SEG_LVL_ALT_Q);
+    }
+  }
+}