Add support of texture frames for video capturer.

- Add ViECapturer unittest.
- Add CloneFrame function in I420VideoFrame.
- Encoders do not support texture yet and texture frames
  are dropped in ViEEncoder for now.

Corresponding CLs:
https://codereview.chromium.org/277943002
http://cl/66620352

BUG=chromium:362437
TEST=WebRTC video stream forwarding. Run video_engine_core_unittests and common_video_unittests.
R=fischman@webrtc.org, perkj@webrtc.org, stefan@webrtc.org, wu@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/12499004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@6252 4adac7df-926f-26a2-2b94-8c16560cd09d

1 files changed, 31 insertions, 8 deletions

diff --git a/video_engine/vie_capturer.cc b/video_engine/vie_capturer.cc
index 867de9b1..30d66335 100644
--- a/video_engine/vie_capturer.cc
+++ b/video_engine/vie_capturer.cc
@@ -10,6 +10,7 @@
 
 #include "webrtc/video_engine/vie_capturer.h"
 
+#include "webrtc/common_video/interface/texture_video_frame.h"
 #include "webrtc/common_video/libyuv/include/webrtc_libyuv.h"
 #include "webrtc/modules/interface/module_common_types.h"
 #include "webrtc/modules/utility/interface/process_thread.h"
@@ -346,11 +347,16 @@ void ViECapturer::OnIncomingCapturedFrame(const int32_t capture_id,
   TRACE_EVENT_ASYNC_BEGIN1("webrtc", "Video", video_frame.render_time_ms(),
                            "render_time", video_frame.render_time_ms());
 
-  captured_frame_.SwapFrame(&video_frame);
+  if (video_frame.native_handle() != NULL) {
+    captured_frame_.reset(video_frame.CloneFrame());
+  } else {
+    if (captured_frame_ == NULL || captured_frame_->native_handle() != NULL)
+      captured_frame_.reset(new I420VideoFrame());
+    captured_frame_->SwapFrame(&video_frame);
+  }
   capture_event_.Set();
-  overuse_detector_->FrameCaptured(captured_frame_.width(),
-                                   captured_frame_.height());
-  return;
+  overuse_detector_->FrameCaptured(captured_frame_->width(),
+                                   captured_frame_->height());
 }
 
 void ViECapturer::OnCaptureDelayChanged(const int32_t id,
@@ -473,7 +479,9 @@ bool ViECapturer::ViECaptureProcess() {
     deliver_cs_->Enter();
     if (SwapCapturedAndDeliverFrameIfAvailable()) {
       encode_start_time = Clock::GetRealTimeClock()->TimeInMilliseconds();
-      DeliverI420Frame(&deliver_frame_);
+      DeliverI420Frame(deliver_frame_.get());
+      if (deliver_frame_->native_handle() != NULL)
+        deliver_frame_.reset();  // Release the texture so it can be reused.
     }
     deliver_cs_->Leave();
     if (current_brightness_level_ != reported_brightness_level_) {
@@ -494,6 +502,11 @@ bool ViECapturer::ViECaptureProcess() {
 }
 
 void ViECapturer::DeliverI420Frame(I420VideoFrame* video_frame) {
+  if (video_frame->native_handle() != NULL) {
+    ViEFrameProviderBase::DeliverFrame(video_frame);
+    return;
+  }
+
   // Apply image enhancement and effect filter.
   if (deflicker_frame_stats_) {
     if (image_proc_module_->GetFrameStats(deflicker_frame_stats_,
@@ -608,11 +621,21 @@ void ViECapturer::OnNoPictureAlarm(const int32_t id,
 
 bool ViECapturer::SwapCapturedAndDeliverFrameIfAvailable() {
   CriticalSectionScoped cs(capture_cs_.get());
-  if (captured_frame_.IsZeroSize())
+  if (captured_frame_ == NULL)
+    return false;
+
+  if (captured_frame_->native_handle() != NULL) {
+    deliver_frame_.reset(captured_frame_.release());
+    return true;
+  }
+
+  if (captured_frame_->IsZeroSize())
     return false;
 
-  deliver_frame_.SwapFrame(&captured_frame_);
-  captured_frame_.ResetSize();
+  if (deliver_frame_ == NULL)
+    deliver_frame_.reset(new I420VideoFrame());
+  deliver_frame_->SwapFrame(captured_frame_.get());
+  captured_frame_->ResetSize();
   return true;
 }