Moving src/webrtc into src/.

In order to eliminate the WebRTC Subtree mirror in Chromium, WebRTC is moving the content of the src/webrtc directory up to the src/ directory. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true TBR=tommi@webrtc.org Bug: chromium:611808 Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38 Reviewed-on: https://webrtc-review.googlesource.com/1560 Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org> Reviewed-by: Henrik Kjellander <kjellander@webrtc.org> Cr-Commit-Position: refs/heads/master@{#19845}
2017-09-15 06:15:48 +02:00
parent 6674846b4a
commit bb547203bf
4576 changed files with 1092 additions and 1196 deletions
--- a/modules/video_processing/util/noise_estimation.cc
+++ b/modules/video_processing/util/noise_estimation.cc
@ -0,0 +1,113 @@
+/*
+ *  Copyright (c) 2016 The WebRTC 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 "webrtc/modules/video_processing/util/noise_estimation.h"
+#if DISPLAYNEON
+#include <android/log.h>
+#endif
+
+namespace webrtc {
+
+void NoiseEstimation::Init(int width, int height, CpuType cpu_type) {
+  int mb_cols = width >> 4;
+  int mb_rows = height >> 4;
+  consec_low_var_.reset(new uint32_t[mb_cols * mb_rows]());
+  width_ = width;
+  height_ = height;
+  mb_cols_ = width_ >> 4;
+  mb_rows_ = height_ >> 4;
+  cpu_type_ = cpu_type;
+}
+
+void NoiseEstimation::GetNoise(int mb_index, uint32_t var, uint32_t luma) {
+  consec_low_var_[mb_index]++;
+  num_static_block_++;
+  if (consec_low_var_[mb_index] >= kConsecLowVarFrame &&
+      (luma >> 6) < kAverageLumaMax && (luma >> 6) > kAverageLumaMin) {
+    // Normalized var by the average luma value, this gives more weight to
+    // darker blocks.
+    int nor_var = var / (luma >> 10);
+    noise_var_ +=
+        nor_var > kBlockSelectionVarMax ? kBlockSelectionVarMax : nor_var;
+    num_noisy_block_++;
+  }
+}
+
+void NoiseEstimation::ResetConsecLowVar(int mb_index) {
+  consec_low_var_[mb_index] = 0;
+}
+
+void NoiseEstimation::UpdateNoiseLevel() {
+  // TODO(jackychen): Tune a threshold for numb_noisy_block > T to make the
+  // condition more reasonable.
+  // No enough samples implies the motion of the camera or too many moving
+  // objects in the frame.
+  if (num_static_block_ <
+          (0.65 * mb_cols_ * mb_rows_ / NOISE_SUBSAMPLE_INTERVAL) ||
+      !num_noisy_block_) {
+#if DISPLAY
+    printf("Not enough samples. %d \n", num_static_block_);
+#elif DISPLAYNEON
+    __android_log_print(ANDROID_LOG_DEBUG, "DISPLAY",
+                        "Not enough samples. %d \n", num_static_block_);
+#endif
+    noise_var_ = 0;
+    noise_var_accum_ = 0;
+    num_noisy_block_ = 0;
+    num_static_block_ = 0;
+    return;
+  } else {
+#if DISPLAY
+    printf("%d %d fraction = %.3f\n", num_static_block_,
+           mb_cols_ * mb_rows_ / NOISE_SUBSAMPLE_INTERVAL,
+           percent_static_block_);
+#elif DISPLAYNEON
+    __android_log_print(ANDROID_LOG_DEBUG, "DISPLAY", "%d %d fraction = %.3f\n",
+                        num_static_block_,
+                        mb_cols_ * mb_rows_ / NOISE_SUBSAMPLE_INTERVAL,
+                        percent_static_block_);
+#endif
+    // Normalized by the number of noisy blocks.
+    noise_var_ /= num_noisy_block_;
+    // Get the percentage of static blocks.
+    percent_static_block_ = static_cast<double>(num_static_block_) /
+                            (mb_cols_ * mb_rows_ / NOISE_SUBSAMPLE_INTERVAL);
+    num_noisy_block_ = 0;
+    num_static_block_ = 0;
+  }
+  // For the first frame just update the value with current noise_var_,
+  // otherwise, use the averaging window.
+  if (noise_var_accum_ == 0) {
+    noise_var_accum_ = noise_var_;
+  } else {
+    noise_var_accum_ = (noise_var_accum_ * 15 + noise_var_) / 16;
+  }
+#if DISPLAY
+  printf("noise_var_accum_ = %.1f, noise_var_ = %d.\n", noise_var_accum_,
+         noise_var_);
+#elif DISPLAYNEON
+  __android_log_print(ANDROID_LOG_DEBUG, "DISPLAY",
+                      "noise_var_accum_ = %.1f, noise_var_ = %d.\n",
+                      noise_var_accum_, noise_var_);
+#endif
+  // Reset noise_var_ for the next frame.
+  noise_var_ = 0;
+}
+
+uint8_t NoiseEstimation::GetNoiseLevel() {
+  int noise_thr = cpu_type_ ? kNoiseThreshold : kNoiseThresholdNeon;
+  UpdateNoiseLevel();
+  if (noise_var_accum_ > noise_thr) {
+    return 1;
+  }
+  return 0;
+}
+
+}  // namespace webrtc