text: /*
   * libjingle
   * Copyright 2004--2011, 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.
   */
  
  
  #ifndef TALK_SESSION_PHONE_WEBRTCVIE_H_
  #define TALK_SESSION_PHONE_WEBRTCVIE_H_
  
  #include "talk/base/common.h"
  #include "talk/session/phone/webrtccommon.h"
  
  #ifdef WEBRTC_RELATIVE_PATH
  #include "common_types.h"
  #include "modules/interface/module_common_types.h"
  #include "modules/video_capture/main/interface/video_capture.h"
  #include "modules/video_render/main/interface/video_render.h"
  #include "video_engine/main/interface/vie_base.h"
  #include "video_engine/main/interface/vie_capture.h"
  #include "video_engine/main/interface/vie_codec.h"
  #include "video_engine/main/interface/vie_errors.h"
  #include "video_engine/main/interface/vie_image_process.h"
  #include "video_engine/main/interface/vie_network.h"
  #include "video_engine/main/interface/vie_render.h"
  #include "video_engine/main/interface/vie_rtp_rtcp.h"
  #else
  #include "third_party/webrtc/files/include/common_types.h"
  #include "third_party/webrtc/files/include/module_common_types.h"
  #include "third_party/webrtc/files/include/video_capture.h"
  #include "third_party/webrtc/files/include/video_render.h"
  #include "third_party/webrtc/files/include/vie_base.h"
  #include "third_party/webrtc/files/include/vie_capture.h"
  #include "third_party/webrtc/files/include/vie_codec.h"
  #include "third_party/webrtc/files/include/vie_errors.h"
  #include "third_party/webrtc/files/include/vie_image_process.h"
  #include "third_party/webrtc/files/include/vie_network.h"
  #include "third_party/webrtc/files/include/vie_render.h"
  #include "third_party/webrtc/files/include/vie_rtp_rtcp.h"
  #endif  // WEBRTC_RELATIVE_PATH
  
  namespace cricket {
  
  // all tracing macros should go to a common file
  
  // automatically handles lifetime of VideoEngine
  class scoped_vie_engine {
   public:
    explicit scoped_vie_engine(webrtc::VideoEngine* e) : ptr(e) {}
    // VERIFY, to ensure that there are no leaks at shutdown
    ~scoped_vie_engine() {
      if (ptr) {
        webrtc::VideoEngine::Delete(ptr);
      }
    }
    webrtc::VideoEngine* get() const { return ptr; }
   private:
    webrtc::VideoEngine* ptr;
  };
  
  // scoped_ptr class to handle obtaining and releasing VideoEngine
  // interface pointers
  template<class T> class scoped_vie_ptr {
   public:
    explicit scoped_vie_ptr(const scoped_vie_engine& e)
         : ptr(T::GetInterface(e.get())) {}
    explicit scoped_vie_ptr(T* p) : ptr(p) {}
    ~scoped_vie_ptr() { if (ptr) ptr->Release(); }
    T* operator->() const { return ptr; }
    T* get() const { return ptr; }
   private:
    T* ptr;
  };
  
  // Utility class for aggregating the various WebRTC interface.
  // Fake implementations can also be injected for testing.
  class ViEWrapper {
   public:
    ViEWrapper()
        : engine_(webrtc::VideoEngine::Create()),
          base_(engine_), codec_(engine_), capture_(engine_),
          network_(engine_), render_(engine_), rtp_(engine_),
          image_(engine_) {
    }
  
    ViEWrapper(webrtc::ViEBase* base, webrtc::ViECodec* codec,
               webrtc::ViECapture* capture, webrtc::ViENetwork* network,
               webrtc::ViERender* render, webrtc::ViERTP_RTCP* rtp,
               webrtc::ViEImageProcess* image)
        : engine_(NULL),
          base_(base),
          codec_(codec),
          capture_(capture),
          network_(network),
          render_(render),
          rtp_(rtp),
          image_(image) {
    }
  
    virtual ~ViEWrapper() {}
    webrtc::VideoEngine* engine() { return engine_.get(); }
    webrtc::ViEBase* base() { return base_.get(); }
    webrtc::ViECodec* codec() { return codec_.get(); }
    webrtc::ViECapture* capture() { return capture_.get(); }
    webrtc::ViENetwork* network() { return network_.get(); }
    webrtc::ViERender* render() { return render_.get(); }
    webrtc::ViERTP_RTCP* rtp() { return rtp_.get(); }
    webrtc::ViEImageProcess* sync() { return image_.get(); }
    int error() { return base_->LastError(); }
  
   private:
    scoped_vie_engine engine_;
    scoped_vie_ptr<webrtc::ViEBase> base_;
    scoped_vie_ptr<webrtc::ViECodec> codec_;
    scoped_vie_ptr<webrtc::ViECapture> capture_;
    scoped_vie_ptr<webrtc::ViENetwork> network_;
    scoped_vie_ptr<webrtc::ViERender> render_;
    scoped_vie_ptr<webrtc::ViERTP_RTCP> rtp_;
    scoped_vie_ptr<webrtc::ViEImageProcess> image_;
  };
  
  // Adds indirection to static WebRtc functions, allowing them to be mocked.
  class ViETraceWrapper {
   public:
    virtual ~ViETraceWrapper() {}
  
    virtual int SetTraceFilter(const unsigned int filter) {
      return webrtc::VideoEngine::SetTraceFilter(filter);
    }
    virtual int SetTraceFile(const char* fileNameUTF8) {
      return webrtc::VideoEngine::SetTraceFile(fileNameUTF8);
    }
    virtual int SetTraceCallback(webrtc::TraceCallback* callback) {
      return webrtc::VideoEngine::SetTraceCallback(callback);
    }
  };
  
  }  // namespace cricket
  
  #endif  // TALK_SESSION_PHONE_WEBRTCVIE_H_
  