Bindings for injectable Java video encoders.

webrtc/sdk/android/src/jni/videoencoderfactorywrapper.h

+/*
+ *  Copyright 2017 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.
+ */
+
+#ifndef WEBRTC_SDK_ANDROID_SRC_JNI_VIDEOENCODERFACTORYWRAPPER_H_
+#define WEBRTC_SDK_ANDROID_SRC_JNI_VIDEOENCODERFACTORYWRAPPER_H_
+
+#include <jni.h>
+#include <vector>
+
+#include "webrtc/media/engine/webrtcvideoencoderfactory.h"
+#include "webrtc/sdk/android/src/jni/jni_helpers.h"
+
+namespace webrtc {
+namespace jni {
+
+// Wrapper for Java VideoEncoderFactory class. Delegates method calls through
+// JNI and wraps the encoder inside VideoEncoderWrapper.
+class VideoEncoderFactoryWrapper : public cricket::WebRtcVideoEncoderFactory {
+ public:
+  VideoEncoderFactoryWrapper(JNIEnv* jni, jobject encoder_factory);
+
+  // Caller takes the ownership of the returned object and it should be released
+  // by calling DestroyVideoEncoder().
+  VideoEncoder* CreateVideoEncoder(const cricket::VideoCodec& codec) override;
+
+  // Returns a list of supported codecs in order of preference.
+  const std::vector<cricket::VideoCodec>& supported_codecs() const override {
+    return supported_codecs_;
+  }
+
+  void DestroyVideoEncoder(VideoEncoder* encoder) override;
+
+ private:
+  std::vector<cricket::VideoCodec> GetSupportedCodecs(JNIEnv* jni) const;
+  jobject ToJavaCodecInfo(JNIEnv* jni, const cricket::VideoCodec& codec);
+
+  const ScopedGlobalRef<jclass> video_codec_info_class_;
+  const ScopedGlobalRef<jclass> hash_map_class_;
+  const ScopedGlobalRef<jobject> encoder_factory_;
+
+  jmethodID create_encoder_method_;
+  jmethodID get_supported_codecs_method_;
+
+  jmethodID video_codec_info_constructor_;
+  jfieldID payload_field_;
+  jfieldID name_field_;
+  jfieldID params_field_;
+
+  jmethodID hash_map_constructor_;
+  jmethodID put_method_;
+
+  std::vector<cricket::VideoCodec> supported_codecs_;
+};
+
+}  // namespace jni
+}  // namespace webrtc
+
+#endif  // WEBRTC_SDK_ANDROID_SRC_JNI_VIDEOENCODERFACTORYWRAPPER_H_