1 /* 2 * libjingle 3 * Copyright 2015 Google Inc. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright notice, 9 * this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright notice, 11 * this list of conditions and the following disclaimer in the documentation 12 * and/or other materials provided with the distribution. 13 * 3. The name of the author may not be used to endorse or promote products 14 * derived from this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 */ 28 29 #ifndef TALK_APP_WEBRTC_JAVA_JNI_ANDROIDVIDEOCAPTURER_JNI_H_ 30 #define TALK_APP_WEBRTC_JAVA_JNI_ANDROIDVIDEOCAPTURER_JNI_H_ 31 32 #include <string> 33 34 #include "talk/app/webrtc/androidvideocapturer.h" 35 #include "talk/app/webrtc/java/jni/jni_helpers.h" 36 #include "webrtc/base/asyncinvoker.h" 37 #include "webrtc/base/criticalsection.h" 38 #include "webrtc/base/thread_checker.h" 39 #include "webrtc/common_video/include/i420_buffer_pool.h" 40 41 namespace webrtc_jni { 42 43 struct NativeHandleImpl; 44 class SurfaceTextureHelper; 45 46 // AndroidVideoCapturerJni implements AndroidVideoCapturerDelegate. 47 // The purpose of the delegate is to hide the JNI specifics from the C++ only 48 // AndroidVideoCapturer. 49 class AndroidVideoCapturerJni : public webrtc::AndroidVideoCapturerDelegate { 50 public: 51 static int SetAndroidObjects(JNIEnv* jni, jobject appliction_context); 52 53 AndroidVideoCapturerJni(JNIEnv* jni, 54 jobject j_video_capturer, 55 jobject j_surface_texture_helper); 56 57 void Start(int width, int height, int framerate, 58 webrtc::AndroidVideoCapturer* capturer) override; 59 void Stop() override; 60 61 std::string GetSupportedFormats() override; 62 63 // Called from VideoCapturerAndroid::NativeObserver on a Java thread. 64 void OnCapturerStarted(bool success); 65 void OnMemoryBufferFrame(void* video_frame, int length, int width, 66 int height, int rotation, int64_t timestamp_ns); 67 void OnTextureFrame(int width, int height, int rotation, int64_t timestamp_ns, 68 const NativeHandleImpl& handle); 69 void OnOutputFormatRequest(int width, int height, int fps); 70 71 protected: 72 ~AndroidVideoCapturerJni(); 73 74 private: 75 JNIEnv* jni(); 76 77 // To avoid deducing Args from the 3rd parameter of AsyncCapturerInvoke. 78 template <typename T> 79 struct Identity { 80 typedef T type; 81 }; 82 83 // Helper function to make safe asynchronous calls to |capturer_|. The calls 84 // are not guaranteed to be delivered. 85 template <typename... Args> 86 void AsyncCapturerInvoke( 87 const char* method_name, 88 void (webrtc::AndroidVideoCapturer::*method)(Args...), 89 typename Identity<Args>::type... args); 90 91 const ScopedGlobalRef<jobject> j_video_capturer_; 92 const ScopedGlobalRef<jclass> j_video_capturer_class_; 93 const ScopedGlobalRef<jclass> j_observer_class_; 94 95 // Used on the Java thread running the camera. 96 webrtc::I420BufferPool buffer_pool_; 97 rtc::scoped_refptr<SurfaceTextureHelper> surface_texture_helper_; 98 rtc::ThreadChecker thread_checker_; 99 100 // |capturer| is a guaranteed to be a valid pointer between a call to 101 // AndroidVideoCapturerDelegate::Start 102 // until AndroidVideoCapturerDelegate::Stop. 103 rtc::CriticalSection capturer_lock_; 104 webrtc::AndroidVideoCapturer* capturer_ GUARDED_BY(capturer_lock_); 105 // |invoker_| is used to communicate with |capturer_| on the thread Start() is 106 // called on. 107 rtc::scoped_ptr<rtc::GuardedAsyncInvoker> invoker_ GUARDED_BY(capturer_lock_); 108 109 static jobject application_context_; 110 111 RTC_DISALLOW_COPY_AND_ASSIGN(AndroidVideoCapturerJni); 112 }; 113 114 } // namespace webrtc_jni 115 116 #endif // TALK_APP_WEBRTC_JAVA_JNI_ANDROIDVIDEOCAPTURER_JNI_H_ 117