Support building WebRTC without audio and video for Android

webrtc/sdk/android/src/jni/video_jni.cc

Index: webrtc/sdk/android/src/jni/video_jni.cc
diff --git a/webrtc/sdk/android/src/jni/video_jni.cc b/webrtc/sdk/android/src/jni/video_jni.cc
new file mode 100644
index 0000000000000000000000000000000000000000..cd3b4b2819b3651474adde573b2a25a9d3a32fe8
--- /dev/null
+++ b/webrtc/sdk/android/src/jni/video_jni.cc
@@ -0,0 +1,108 @@
+/*
+ *  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.
+ */
+
+#include <jni.h>
+
+#include "webrtc/api/videosourceproxy.h"
+#include "webrtc/base/logging.h"
+#include "webrtc/media/engine/webrtcvideodecoderfactory.h"
+#include "webrtc/media/engine/webrtcvideoencoderfactory.h"
+#include "webrtc/sdk/android/src/jni/androidmediadecoder_jni.h"
+#include "webrtc/sdk/android/src/jni/androidmediaencoder_jni.h"
+#include "webrtc/sdk/android/src/jni/androidvideotracksource.h"
+#include "webrtc/sdk/android/src/jni/classreferenceholder.h"
+#include "webrtc/sdk/android/src/jni/ownedfactoryandthreads.h"
+#include "webrtc/sdk/android/src/jni/surfacetexturehelper_jni.h"
+
+using cricket::WebRtcVideoDecoderFactory;
+using cricket::WebRtcVideoEncoderFactory;
+using webrtc::AndroidVideoTrackSource;
+using webrtc::AudioSourceInterface;
+using webrtc::VideoTrackSourceInterface;
+using webrtc::VideoTrackInterface;
+
+namespace webrtc_jni {
+
+WebRtcVideoEncoderFactory* CreateVideoEncoderFactory() {
+  return new MediaCodecVideoEncoderFactory();
+}
+
+WebRtcVideoDecoderFactory* CreateVideoDecoderFactory() {
+  return new MediaCodecVideoDecoderFactory();
+}
+
+jobject GetJavaSurfaceTextureHelper(
+    rtc::scoped_refptr<SurfaceTextureHelper> surface_texture_helper) {
+  return surface_texture_helper
+             ? surface_texture_helper->GetJavaSurfaceTextureHelper()
+             : nullptr;
+}
+
+JOW(jlong, PeerConnectionFactory_nativeCreateVideoSource)
+(JNIEnv* jni,
+ jclass,
+ jlong native_factory,
+ jobject j_surface_texture_helper,
+ jboolean is_screencast) {
+  OwnedFactoryAndThreads* factory =
+      reinterpret_cast<OwnedFactoryAndThreads*>(native_factory);
+
+  rtc::scoped_refptr<webrtc::AndroidVideoTrackSource> source(
+      new rtc::RefCountedObject<webrtc::AndroidVideoTrackSource>(
+          factory->signaling_thread(), jni, j_surface_texture_helper,
+          is_screencast));
+  rtc::scoped_refptr<webrtc::VideoTrackSourceProxy> proxy_source =
+      webrtc::VideoTrackSourceProxy::Create(factory->signaling_thread(),
+                                            factory->worker_thread(), source);
+
+  return (jlong)proxy_source.release();
+}
+
+JOW(jlong, PeerConnectionFactory_nativeCreateVideoTrack)
+(JNIEnv* jni, jclass, jlong native_factory, jstring id, jlong native_source) {
+  rtc::scoped_refptr<PeerConnectionFactoryInterface> factory(
+      factoryFromJava(native_factory));
+  rtc::scoped_refptr<VideoTrackInterface> track(factory->CreateVideoTrack(
+      JavaToStdString(jni, id),
+      reinterpret_cast<VideoTrackSourceInterface*>(native_source)));
+  return (jlong)track.release();
+}
+
+JOW(void, PeerConnectionFactory_nativeSetVideoHwAccelerationOptions)
+(JNIEnv* jni,
+ jclass,
+ jlong native_factory,
+ jobject local_egl_context,
+ jobject remote_egl_context) {
+  OwnedFactoryAndThreads* owned_factory =
+      reinterpret_cast<OwnedFactoryAndThreads*>(native_factory);
+
+  jclass j_eglbase14_context_class =
+      FindClass(jni, "org/webrtc/EglBase14$Context");
+
+  MediaCodecVideoEncoderFactory* encoder_factory =
+      static_cast<MediaCodecVideoEncoderFactory*>(
+          owned_factory->encoder_factory());
+  if (encoder_factory &&
+      jni->IsInstanceOf(local_egl_context, j_eglbase14_context_class)) {
+    LOG(LS_INFO) << "Set EGL context for HW encoding.";
+    encoder_factory->SetEGLContext(jni, local_egl_context);
+  }
+
+  MediaCodecVideoDecoderFactory* decoder_factory =
+      static_cast<MediaCodecVideoDecoderFactory*>(
+          owned_factory->decoder_factory());
+  if (decoder_factory) {
+    LOG(LS_INFO) << "Set EGL context for HW decoding.";
+    decoder_factory->SetEGLContext(jni, remote_egl_context);
+  }
+}
+
+}  // namespace webrtc_jni