69 lines
2.6 KiB
C
69 lines
2.6 KiB
C
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/*
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* Copyright 2015 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_API_JAVA_JNI_SURFACETEXTUREHELPER_JNI_H_
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#define WEBRTC_API_JAVA_JNI_SURFACETEXTUREHELPER_JNI_H_
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#include <jni.h>
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#include "webrtc/api/java/jni/jni_helpers.h"
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#include "webrtc/api/java/jni/native_handle_impl.h"
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#include "webrtc/base/refcount.h"
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#include "webrtc/base/scoped_ref_ptr.h"
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#include "webrtc/common_video/include/video_frame_buffer.h"
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namespace webrtc_jni {
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// Helper class to create and synchronize access to an Android SurfaceTexture.
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// It is used for creating webrtc::VideoFrameBuffers from a SurfaceTexture when
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// the SurfaceTexture has been updated.
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// When the VideoFrameBuffer is released, this class returns the buffer to the
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// java SurfaceTextureHelper so it can be updated safely. The VideoFrameBuffer
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// can be released on an arbitrary thread.
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// SurfaceTextureHelper is reference counted to make sure that it is not
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// destroyed while a VideoFrameBuffer is in use.
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// This class is the C++ counterpart of the java class SurfaceTextureHelper.
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// It owns the corresponding java object, and calls the java dispose
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// method when destroyed.
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// Usage:
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// 1. Create an instance of this class.
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// 2. Get the Java SurfaceTextureHelper with GetJavaSurfaceTextureHelper().
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// 3. Register a listener to the Java SurfaceListener and start producing
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// new buffers.
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// 4. Call CreateTextureFrame to wrap the Java texture in a VideoFrameBuffer.
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class SurfaceTextureHelper : public rtc::RefCountInterface {
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public:
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// Might return null if creating the Java SurfaceTextureHelper fails.
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static rtc::scoped_refptr<SurfaceTextureHelper> create(
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JNIEnv* jni, const char* thread_name, jobject j_egl_context);
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jobject GetJavaSurfaceTextureHelper() const;
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rtc::scoped_refptr<webrtc::VideoFrameBuffer> CreateTextureFrame(
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int width,
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int height,
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const NativeHandleImpl& native_handle);
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// May be called on arbitrary thread.
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void ReturnTextureFrame() const;
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protected:
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~SurfaceTextureHelper();
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SurfaceTextureHelper(JNIEnv* jni, jobject j_surface_texture_helper);
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private:
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const ScopedGlobalRef<jobject> j_surface_texture_helper_;
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const jmethodID j_return_texture_method_;
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};
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} // namespace webrtc_jni
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#endif // WEBRTC_API_JAVA_JNI_SURFACETEXTUREHELPER_JNI_H_
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