Move libvpx from DEPS to src

third_party/libvpx/source/libvpx/vp9/encoder/vp9_aq_variance.c

Index: third_party/libvpx/source/libvpx/vp9/encoder/vp9_aq_variance.c
diff --git a/third_party/libvpx/source/libvpx/vp9/encoder/vp9_aq_variance.c b/third_party/libvpx/source/libvpx/vp9/encoder/vp9_aq_variance.c
new file mode 100644
index 0000000000000000000000000000000000000000..be6f7e4ee535760f323bc070f90fdab9a7469c99
--- /dev/null
+++ b/third_party/libvpx/source/libvpx/vp9/encoder/vp9_aq_variance.c
@@ -0,0 +1,150 @@
+/*
+ *  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 "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"
+#include "vp9/common/vp9_systemdependent.h"
+
+#define ENERGY_MIN (-4)
+#define ENERGY_MAX (1)
+#define ENERGY_SPAN (ENERGY_MAX - ENERGY_MIN +  1)
+#define ENERGY_IN_BOUNDS(energy)\
+  assert((energy) >= ENERGY_MIN && (energy) <= ENERGY_MAX)
+
+static const double rate_ratio[MAX_SEGMENTS] =
+  {2.5, 2.0, 1.5, 1.0, 0.75, 1.0, 1.0, 1.0};
+static const int segment_id[ENERGY_SPAN] = {0, 1, 1, 2, 3, 4};
+
+#define SEGMENT_ID(i) segment_id[(i) - ENERGY_MIN]
+
+DECLARE_ALIGNED(16, static const uint8_t, vp9_64_zeros[64]) = {0};
+#if CONFIG_VP9_HIGHBITDEPTH
+DECLARE_ALIGNED(16, static const uint16_t, vp9_highbd_64_zeros[64]) = {0};
+#endif
+
+unsigned int vp9_vaq_segment_id(int energy) {
+  ENERGY_IN_BOUNDS(energy);
+  return SEGMENT_ID(energy);
+}
+
+void vp9_vaq_frame_setup(VP9_COMP *cpi) {
+  VP9_COMMON *cm = &cpi->common;
+  struct segmentation *seg = &cm->seg;
+  int i;
+
+  if (cm->frame_type == KEY_FRAME ||
+      cpi->refresh_alt_ref_frame ||
+      (cpi->refresh_golden_frame && !cpi->rc.is_src_frame_alt_ref)) {
+    vp9_enable_segmentation(seg);
+    vp9_clearall_segfeatures(seg);
+
+    seg->abs_delta = SEGMENT_DELTADATA;
+
+    vp9_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);
+    }
+  }
+}
+
+
+static unsigned int block_variance(VP9_COMP *cpi, MACROBLOCK *x,
+                                   BLOCK_SIZE bs) {
+  MACROBLOCKD *xd = &x->e_mbd;
+  unsigned int var, sse;
+  int right_overflow = (xd->mb_to_right_edge < 0) ?
+      ((-xd->mb_to_right_edge) >> 3) : 0;
+  int bottom_overflow = (xd->mb_to_bottom_edge < 0) ?
+      ((-xd->mb_to_bottom_edge) >> 3) : 0;
+
+  if (right_overflow || bottom_overflow) {
+    const int bw = 8 * num_8x8_blocks_wide_lookup[bs] - right_overflow;
+    const int bh = 8 * num_8x8_blocks_high_lookup[bs] - bottom_overflow;
+    int avg;
+#if CONFIG_VP9_HIGHBITDEPTH
+    if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
+      highbd_variance(x->plane[0].src.buf, x->plane[0].src.stride,
+                      CONVERT_TO_BYTEPTR(vp9_highbd_64_zeros), 0, bw, bh,
+                      &sse, &avg);
+      sse >>= 2 * (xd->bd - 8);
+      avg >>= (xd->bd - 8);
+    } else {
+      variance(x->plane[0].src.buf, x->plane[0].src.stride,
+               vp9_64_zeros, 0, bw, bh, &sse, &avg);
+    }
+#else
+    variance(x->plane[0].src.buf, x->plane[0].src.stride,
+             vp9_64_zeros, 0, bw, bh, &sse, &avg);
+#endif  // CONFIG_VP9_HIGHBITDEPTH
+    var = sse - (((int64_t)avg * avg) / (bw * bh));
+    return (256 * var) / (bw * bh);
+  } else {
+#if CONFIG_VP9_HIGHBITDEPTH
+    if (xd->cur_buf->flags & YV12_FLAG_HIGHBITDEPTH) {
+      var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf,
+                               x->plane[0].src.stride,
+                               CONVERT_TO_BYTEPTR(vp9_highbd_64_zeros),
+                               0, &sse);
+    } else {
+      var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf,
+                               x->plane[0].src.stride,
+                               vp9_64_zeros, 0, &sse);
+    }
+#else
+    var = cpi->fn_ptr[bs].vf(x->plane[0].src.buf,
+                             x->plane[0].src.stride,
+                             vp9_64_zeros, 0, &sse);
+#endif  // CONFIG_VP9_HIGHBITDEPTH
+    return (256 * var) >> num_pels_log2_lookup[bs];
+  }
+}
+
+double vp9_log_block_var(VP9_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) {
+  unsigned int var = block_variance(cpi, x, bs);
+  vp9_clear_system_state();
+  return log(var + 1.0);
+}
+
+#define DEFAULT_E_MIDPOINT 10.0
+int vp9_block_energy(VP9_COMP *cpi, MACROBLOCK *x, BLOCK_SIZE bs) {
+  double energy;
+  double energy_midpoint;
+  vp9_clear_system_state();
+  energy_midpoint =
+    (cpi->oxcf.pass == 2) ? cpi->twopass.mb_av_energy : DEFAULT_E_MIDPOINT;
+  energy = vp9_log_block_var(cpi, x, bs) - energy_midpoint;
+  return clamp((int)round(energy), ENERGY_MIN, ENERGY_MAX);
+}