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      1 /*
      2  * Copyright (C) 2011 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #ifndef MediaListener_h
     18 #define MediaListener_h
     19 
     20 #if USE(ACCELERATED_COMPOSITING)
     21 
     22 #include <gui/SurfaceTexture.h>
     23 #include <gui/SurfaceTextureClient.h>
     24 #include <jni.h>
     25 #include <JNIUtility.h>
     26 #include "MediaTexture.h"
     27 #include "WebCoreJni.h"
     28 
     29 #ifdef DEBUG
     30 
     31 #include <cutils/log.h>
     32 #include <wtf/text/CString.h>
     33 
     34 #undef XLOG
     35 #define XLOG(...) android_printLog(ANDROID_LOG_DEBUG, "MediaListener", __VA_ARGS__)
     36 
     37 #else
     38 
     39 #undef XLOG
     40 #define XLOG(...)
     41 
     42 #endif // DEBUG
     43 
     44 namespace WebCore {
     45 
     46 class MediaListener : public android::SurfaceTexture::FrameAvailableListener {
     47 
     48 public:
     49     MediaListener(jobject weakWebViewRef,
     50                   const sp<android::SurfaceTexture>& surfaceTexture,
     51                   const sp<ANativeWindow>& nativeWindow)
     52         : m_weakWebViewRef(weakWebViewRef)
     53         , m_postInvalMethod(0)
     54         , m_frameAvailable(false)
     55         , m_surfaceTexture(surfaceTexture)
     56         , m_nativeWindow(nativeWindow)
     57         , m_framerateCallback(0)
     58     {
     59         if (!m_weakWebViewRef)
     60             return;
     61 
     62         JNIEnv* env = JSC::Bindings::getJNIEnv();
     63         jobject localWebViewRef = env->NewLocalRef(m_weakWebViewRef);
     64         if (localWebViewRef) {
     65             jclass wvClass = env->GetObjectClass(localWebViewRef);
     66             m_postInvalMethod = env->GetMethodID(wvClass, "postInvalidate", "()V");
     67             env->DeleteLocalRef(wvClass);
     68             env->DeleteLocalRef(localWebViewRef);
     69         }
     70         checkException(env);
     71     }
     72 
     73     virtual void onFrameAvailable()
     74     {
     75         JNIEnv* env = JSC::Bindings::getJNIEnv();
     76         jobject localWebViewRef = env->NewLocalRef(m_weakWebViewRef);
     77         if (localWebViewRef) {
     78             env->CallVoidMethod(localWebViewRef, m_postInvalMethod);
     79             env->DeleteLocalRef(localWebViewRef);
     80         }
     81         checkException(env);
     82         if (!m_frameAvailable) {
     83             m_frameAvailable = true;
     84         }
     85         if (m_framerateCallback)
     86             m_framerateCallback(m_nativeWindow.get(), m_surfaceTexture->getTimestamp());
     87     }
     88 
     89     bool isFrameAvailable() { return m_frameAvailable; }
     90     void setFramerateCallback(FramerateCallbackProc callback) { m_framerateCallback = callback; }
     91 
     92 private:
     93     jobject m_weakWebViewRef;
     94     jmethodID m_postInvalMethod;
     95     bool m_frameAvailable;
     96     sp<android::SurfaceTexture> m_surfaceTexture;
     97     sp<ANativeWindow> m_nativeWindow;
     98     FramerateCallbackProc m_framerateCallback;
     99 };
    100 
    101 } // namespace WebCore
    102 
    103 #endif // USE(ACCELERATED_COMPOSITING)
    104 #endif  // MediaListener_h
    105