iOS HW H264 support.

webrtc/modules/video_coding/codecs/h264/h264.cc

+/*
+ *  Copyright (c) 2015 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_coding/codecs/h264/include/h264.h"
+
+#if defined(WEBRTC_IOS)
+#include "webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_decoder.h"
+#include "webrtc/modules/video_coding/codecs/h264/h264_video_toolbox_encoder.h"
+#endif
+
+#include "webrtc/base/checks.h"
+
+namespace webrtc {
+
+// We need this file to be C++ only so it will compile properly for all
+// platforms. In order to write ObjC specific implementations we use private
+// externs. This function is defined in h264.mm.
+#if defined(WEBRTC_IOS)
+extern bool IsH264CodecSupportedObjC();
+#endif
+
+bool IsH264CodecSupported() {
+#if defined(WEBRTC_IOS)
+  return IsH264CodecSupportedObjC();
+#else
+  return false;
+#endif
+}
+
+H264Encoder* H264Encoder::Create() {
+  DCHECK(H264Encoder::IsSupported());
+#if defined(WEBRTC_IOS) && defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)
+  return new H264VideoToolboxEncoder();
+#else
+  RTC_NOTREACHED();
+  return nullptr;
+#endif
+}
+
+bool H264Encoder::IsSupported() {
+  return IsH264CodecSupported();
+}
+
+H264Decoder* H264Decoder::Create() {
+  DCHECK(H264Decoder::IsSupported());
+#if defined(WEBRTC_IOS) && defined(WEBRTC_VIDEO_TOOLBOX_SUPPORTED)
+  return new H264VideoToolboxDecoder();
+#else
+  RTC_NOTREACHED();
+  return nullptr;
+#endif
+}
+
+bool H264Decoder::IsSupported() {
+  return IsH264CodecSupported();
+}
+
+}  // namespace webrtc