1 files changed, 78 insertions, 0 deletions
diff --git a/talk/media/base/videoframefactory.cc b/talk/media/base/videoframefactory.cc
new file mode 100644
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+++ b/talk/media/base/videoframefactory.cc
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+/*
+ * libjingle
+ * Copyright 2014 Google Inc.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright notice,
+ *     this list of conditions and the following disclaimer in the documentation
+ *     and/or other materials provided with the distribution.
+ *  3. The name of the author may not be used to endorse or promote products
+ *     derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
+ * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
+ * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "talk/media/base/videoframefactory.h"
+
+#include <algorithm>
+#include "talk/media/base/videocapturer.h"
+
+namespace cricket {
+
+VideoFrame* VideoFrameFactory::CreateAliasedFrame(
+    const CapturedFrame* input_frame,
+    int cropped_input_width,
+    int cropped_input_height,
+    int output_width,
+    int output_height) const {
+  rtc::scoped_ptr<VideoFrame> cropped_input_frame(CreateAliasedFrame(
+      input_frame, cropped_input_width, cropped_input_height));
+  if (!cropped_input_frame)
+    return nullptr;
+
+  if (cropped_input_width == output_width &&
+      cropped_input_height == output_height) {
+    // No scaling needed.
+    return cropped_input_frame.release();
+  }
+
+  // If the frame is rotated, we need to switch the width and height.
+  if (apply_rotation_ &&
+      (input_frame->GetRotation() == webrtc::kVideoRotation_90 ||
+       input_frame->GetRotation() == webrtc::kVideoRotation_270)) {
+    std::swap(output_width, output_height);
+  }
+
+  // Create and stretch the output frame if it has not been created yet, is
+  // still in use by others, or its size is not same as the expected.
+  if (!output_frame_ || !output_frame_->IsExclusive() ||
+      output_frame_->GetWidth() != static_cast<size_t>(output_width) ||
+      output_frame_->GetHeight() != static_cast<size_t>(output_height)) {
+    output_frame_.reset(
+        cropped_input_frame->Stretch(output_width, output_height, true, true));
+    if (!output_frame_) {
+      LOG(LS_WARNING) << "Failed to stretch frame to " << output_width << "x"
+                      << output_height;
+      return NULL;
+    }
+  } else {
+    cropped_input_frame->StretchToFrame(output_frame_.get(), true, true);
+    output_frame_->SetTimeStamp(cropped_input_frame->GetTimeStamp());
+  }
+  return output_frame_->Copy();
+}
+
+}  // namespace cricket