Move aq_mode=2 (complexity_aq) to separate file.
Change-Id: Iffa45b9b04196c1ded6037622a8644a2500a62de
diff --git a/vp9/encoder/vp9_aq_complexity.c b/vp9/encoder/vp9_aq_complexity.c
new file mode 100644
index 0000000..83892e8
--- /dev/null
+++ b/vp9/encoder/vp9_aq_complexity.c
@@ -0,0 +1,104 @@
+/*
+ * 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.
+ */
+
+#include <limits.h>
+#include <math.h>
+
+#include "vp9/common/vp9_seg_common.h"
+
+#include "vp9/encoder/vp9_segmentation.h"
+
+static const double in_frame_q_adj_ratio[MAX_SEGMENTS] =
+ {1.0, 2.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0};
+
+void vp9_setup_in_frame_q_adj(VP9_COMP *cpi) {
+ VP9_COMMON *const cm = &cpi->common;
+ struct segmentation *const seg = &cm->seg;
+
+ // Make SURE use of floating point in this function is safe.
+ vp9_clear_system_state();
+
+ if (cm->frame_type == KEY_FRAME ||
+ cpi->refresh_alt_ref_frame ||
+ (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref)) {
+ int segment;
+
+ // Clear down the segment map.
+ vpx_memset(cpi->segmentation_map, 0, cm->mi_rows * cm->mi_cols);
+
+ // Clear down the complexity map used for rd.
+ vpx_memset(cpi->complexity_map, 0, cm->mi_rows * cm->mi_cols);
+
+ vp9_enable_segmentation(seg);
+ vp9_clearall_segfeatures(seg);
+
+ // Select delta coding method.
+ seg->abs_delta = SEGMENT_DELTADATA;
+
+ // Segment 0 "Q" feature is disabled so it defaults to the baseline Q.
+ vp9_disable_segfeature(seg, 0, SEG_LVL_ALT_Q);
+
+ // Use some of the segments for in frame Q adjustment.
+ for (segment = 1; segment < 2; segment++) {
+ const int qindex_delta =
+ vp9_compute_qdelta_by_rate(cpi,
+ cm->base_qindex,
+ in_frame_q_adj_ratio[segment]);
+ vp9_enable_segfeature(seg, segment, SEG_LVL_ALT_Q);
+ vp9_set_segdata(seg, segment, SEG_LVL_ALT_Q, qindex_delta);
+ }
+ }
+}
+
+// Select a segment for the current SB64
+void vp9_select_in_frame_q_segment(VP9_COMP *cpi,
+ int mi_row, int mi_col,
+ int output_enabled, int projected_rate) {
+ VP9_COMMON *const cm = &cpi->common;
+
+ const int mi_offset = mi_row * cm->mi_cols + mi_col;
+ const int bw = num_8x8_blocks_wide_lookup[BLOCK_64X64];
+ const int bh = num_8x8_blocks_high_lookup[BLOCK_64X64];
+ const int xmis = MIN(cm->mi_cols - mi_col, bw);
+ const int ymis = MIN(cm->mi_rows - mi_row, bh);
+ int complexity_metric = 64;
+ int x, y;
+
+ unsigned char segment;
+
+ if (!output_enabled) {
+ segment = 0;
+ } else {
+ // Rate depends on fraction of a SB64 in frame (xmis * ymis / bw * bh).
+ // It is converted to bits * 256 units.
+ const int target_rate = (cpi->rc.sb64_target_rate * xmis * ymis * 256) /
+ (bw * bh);
+
+ if (projected_rate < (target_rate / 4)) {
+ segment = 1;
+ } else {
+ segment = 0;
+ }
+
+ if (target_rate > 0) {
+ complexity_metric =
+ clamp((int)((projected_rate * 64) / target_rate), 16, 255);
+ }
+ }
+
+ // Fill in the entires in the segment map corresponding to this SB64.
+ for (y = 0; y < ymis; y++) {
+ for (x = 0; x < xmis; x++) {
+ cpi->segmentation_map[mi_offset + y * cm->mi_cols + x] = segment;
+ cpi->complexity_map[mi_offset + y * cm->mi_cols + x] =
+ (unsigned char)complexity_metric;
+ }
+ }
+}
