1 files changed, 99 insertions, 0 deletions
diff --git a/media/libvpx/vp9/encoder/vp9_aq_cyclicrefresh.h b/media/libvpx/vp9/encoder/vp9_aq_cyclicrefresh.h
new file mode 100644
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--- /dev/null
+++ b/media/libvpx/vp9/encoder/vp9_aq_cyclicrefresh.h
@@ -0,0 +1,99 @@
+/*
+ *  Copyright (c) 2014 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.
+ */
+
+
+#ifndef VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_
+#define VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_
+
+#include "vp9/common/vp9_blockd.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// The segment ids used in cyclic refresh: from base (no boost) to increasing
+// boost (higher delta-qp).
+#define CR_SEGMENT_ID_BASE    0
+#define CR_SEGMENT_ID_BOOST1  1
+#define CR_SEGMENT_ID_BOOST2  2
+
+// Maximum rate target ratio for setting segment delta-qp.
+#define CR_MAX_RATE_TARGET_RATIO 4.0
+
+// Boost factor for rate target ratio, for segment CR_SEGMENT_ID_BOOST2.
+#define CR_BOOST2_FAC 1.7
+
+struct VP9_COMP;
+
+struct CYCLIC_REFRESH;
+typedef struct CYCLIC_REFRESH CYCLIC_REFRESH;
+
+CYCLIC_REFRESH *vp9_cyclic_refresh_alloc(int mi_rows, int mi_cols);
+
+void vp9_cyclic_refresh_free(CYCLIC_REFRESH *cr);
+
+// Estimate the bits, incorporating the delta-q from segment 1, after encoding
+// the frame.
+int vp9_cyclic_refresh_estimate_bits_at_q(const struct VP9_COMP *cpi,
+                                          double correction_factor);
+
+// Estimate the bits per mb, for a given q = i and a corresponding delta-q
+// (for segment 1), prior to encoding the frame.
+int vp9_cyclic_refresh_rc_bits_per_mb(const struct VP9_COMP *cpi, int i,
+                                      double correction_factor);
+
+// Prior to coding a given prediction block, of size bsize at (mi_row, mi_col),
+// check if we should reset the segment_id, and update the cyclic_refresh map
+// and segmentation map.
+void vp9_cyclic_refresh_update_segment(struct VP9_COMP *const cpi,
+                                       MB_MODE_INFO *const mbmi,
+                                       int mi_row, int mi_col, BLOCK_SIZE bsize,
+                                       int64_t rate, int64_t dist, int skip);
+
+// Update the segmentation map, and related quantities: cyclic refresh map,
+// refresh sb_index, and target number of blocks to be refreshed.
+void vp9_cyclic_refresh_update__map(struct VP9_COMP *const cpi);
+
+// Update the actual number of blocks that were applied the segment delta q.
+void vp9_cyclic_refresh_postencode(struct VP9_COMP *const cpi);
+
+// Set golden frame update interval, for non-svc 1 pass CBR mode.
+void vp9_cyclic_refresh_set_golden_update(struct VP9_COMP *const cpi);
+
+// Check if we should not update golden reference, based on past refresh stats.
+void vp9_cyclic_refresh_check_golden_update(struct VP9_COMP *const cpi);
+
+// Set/update global/frame level refresh parameters.
+void vp9_cyclic_refresh_update_parameters(struct VP9_COMP *const cpi);
+
+// Setup cyclic background refresh: set delta q and segmentation map.
+void vp9_cyclic_refresh_setup(struct VP9_COMP *const cpi);
+
+int vp9_cyclic_refresh_get_rdmult(const CYCLIC_REFRESH *cr);
+
+static INLINE int cyclic_refresh_segment_id_boosted(int segment_id) {
+  return segment_id == CR_SEGMENT_ID_BOOST1 ||
+         segment_id == CR_SEGMENT_ID_BOOST2;
+}
+
+static INLINE int cyclic_refresh_segment_id(int segment_id) {
+  if (segment_id == CR_SEGMENT_ID_BOOST1)
+    return CR_SEGMENT_ID_BOOST1;
+  else if (segment_id == CR_SEGMENT_ID_BOOST2)
+    return CR_SEGMENT_ID_BOOST2;
+  else
+    return CR_SEGMENT_ID_BASE;
+}
+
+#ifdef __cplusplus
+}  // extern "C"
+#endif
+
+#endif  // VP9_ENCODER_VP9_AQ_CYCLICREFRESH_H_