1 files changed, 97 insertions, 0 deletions
diff --git a/webrtc/modules/video_processing/spatial_resampler.cc b/webrtc/modules/video_processing/spatial_resampler.cc
new file mode 100644
index 0000000000..cdbe0efac1
--- /dev/null
+++ b/webrtc/modules/video_processing/spatial_resampler.cc
@@ -0,0 +1,97 @@
+/*
+ *  Copyright (c) 2012 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/spatial_resampler.h"
+
+namespace webrtc {
+
+VPMSimpleSpatialResampler::VPMSimpleSpatialResampler()
+    : resampling_mode_(kFastRescaling),
+      target_width_(0),
+      target_height_(0),
+      scaler_() {}
+
+VPMSimpleSpatialResampler::~VPMSimpleSpatialResampler() {}
+
+int32_t VPMSimpleSpatialResampler::SetTargetFrameSize(int32_t width,
+                                                      int32_t height) {
+  if (resampling_mode_ == kNoRescaling)
+    return VPM_OK;
+
+  if (width < 1 || height < 1)
+    return VPM_PARAMETER_ERROR;
+
+  target_width_ = width;
+  target_height_ = height;
+
+  return VPM_OK;
+}
+
+void VPMSimpleSpatialResampler::SetInputFrameResampleMode(
+    VideoFrameResampling resampling_mode) {
+  resampling_mode_ = resampling_mode;
+}
+
+void VPMSimpleSpatialResampler::Reset() {
+  resampling_mode_ = kFastRescaling;
+  target_width_ = 0;
+  target_height_ = 0;
+}
+
+int32_t VPMSimpleSpatialResampler::ResampleFrame(const VideoFrame& inFrame,
+                                                 VideoFrame* outFrame) {
+  // Don't copy if frame remains as is.
+  if (resampling_mode_ == kNoRescaling) {
+    return VPM_OK;
+  // Check if re-sampling is needed
+  } else if ((inFrame.width() == target_width_) &&
+             (inFrame.height() == target_height_)) {
+    return VPM_OK;
+  }
+
+  // Setting scaler
+  // TODO(mikhal/marpan): Should we allow for setting the filter mode in
+  // _scale.Set() with |resampling_mode_|?
+  int ret_val = 0;
+  ret_val = scaler_.Set(inFrame.width(), inFrame.height(), target_width_,
+                        target_height_, kI420, kI420, kScaleBox);
+  if (ret_val < 0)
+    return ret_val;
+
+  ret_val = scaler_.Scale(inFrame, outFrame);
+
+  // Setting time parameters to the output frame.
+  // Timestamp will be reset in Scale call above, so we should set it after.
+  outFrame->set_timestamp(inFrame.timestamp());
+  outFrame->set_render_time_ms(inFrame.render_time_ms());
+
+  if (ret_val == 0)
+    return VPM_OK;
+  else
+    return VPM_SCALE_ERROR;
+}
+
+int32_t VPMSimpleSpatialResampler::TargetHeight() {
+  return target_height_;
+}
+
+int32_t VPMSimpleSpatialResampler::TargetWidth() {
+  return target_width_;
+}
+
+bool VPMSimpleSpatialResampler::ApplyResample(int32_t width, int32_t height) {
+  if ((width == target_width_ && height == target_height_) ||
+      resampling_mode_ == kNoRescaling)
+    return false;
+  else
+    return true;
+}
+
+}  // namespace webrtc