iOS HW H264 support.

talk/app/webrtc/objc/h264encoderfactory.h

 /*
  * libjingle
  * Copyright 2015 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_APP_WEBRTC_JAVA_JNI_ANDROIDMEDIAENCODER_JNI_H_
-#define TALK_APP_WEBRTC_JAVA_JNI_ANDROIDMEDIAENCODER_JNI_H_
+#ifndef TALK_APP_WEBRTC_OBJC_H264_ENCODER_FACTORY_H_
+#define TALK_APP_WEBRTC_OBJC_H264_ENCODER_FACTORY_H_
 
 #include <vector>
 
-#include "talk/app/webrtc/java/jni/jni_helpers.h"
 #include "talk/media/webrtc/webrtcvideoencoderfactory.h"
+#include "webrtc/base/constructormagic.h"
 
-namespace webrtc_jni {
+namespace webrtc {
 
-// Implementation of Android MediaCodec based encoder factory.
-class MediaCodecVideoEncoderFactory
-    : public cricket::WebRtcVideoEncoderFactory {
+// This classes is a quick measure for plugging in H264 support and will
+// eventually go away once we build H264 support into the video engine.
+class H264EncoderFactory : public cricket::WebRtcVideoEncoderFactory {
  public:
-  MediaCodecVideoEncoderFactory();
-  virtual ~MediaCodecVideoEncoderFactory();
-
-  // WebRtcVideoEncoderFactory implementation.
-  webrtc::VideoEncoder* CreateVideoEncoder(webrtc::VideoCodecType type)
-      override;
+  H264EncoderFactory();
+  ~H264EncoderFactory() override {}
+  webrtc::VideoEncoder* CreateVideoEncoder(
+      webrtc::VideoCodecType type) override;
   const std::vector<VideoCodec>& codecs() const override;
   void DestroyVideoEncoder(webrtc::VideoEncoder* encoder) override;
 
  private:
-  // Empty if platform support is lacking, const after ctor returns.
-  std::vector<VideoCodec> supported_codecs_;
+  // On construction we check that we are able to create a H264 encoder. If we
+  // can then this vector is populated with just the H264 codec, otherwise it
+  // will be empty. This vector is returned in the codecs() method.
+  std::vector<VideoCodec> h264_codec_or_empty_vector_;
+
+  DISALLOW_COPY_AND_ASSIGN(H264EncoderFactory);
 };
 
-}  // namespace webrtc_jni
+}  // namespace webrtc
 
-#endif  // TALK_APP_WEBRTC_JAVA_JNI_ANDROIDMEDIAENCODER_JNI_H_
+#endif  // TALK_APP_WEBRTC_OBJC_H264_ENCODER_FACTORY_H_