blob: 1d8bafc99e548cfead3e34936e648339b2cd45b8 [file] [log] [blame]
* Copyright 2015 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/java/jni/jni_helpers.h"
#include "webrtc/api/java/jni/native_handle_impl.h"
#include "webrtc/base/refcount.h"
#include "webrtc/base/scoped_ref_ptr.h"
#include "webrtc/common_video/include/video_frame_buffer.h"
namespace webrtc_jni {
// Helper class to create and synchronize access to an Android SurfaceTexture.
// It is used for creating webrtc::VideoFrameBuffers from a SurfaceTexture when
// the SurfaceTexture has been updated.
// When the VideoFrameBuffer is released, this class returns the buffer to the
// java SurfaceTextureHelper so it can be updated safely. The VideoFrameBuffer
// can be released on an arbitrary thread.
// SurfaceTextureHelper is reference counted to make sure that it is not
// destroyed while a VideoFrameBuffer is in use.
// This class is the C++ counterpart of the java class SurfaceTextureHelper.
// It owns the corresponding java object, and calls the java dispose
// method when destroyed.
// Usage:
// 1. Create an instance of this class.
// 2. Get the Java SurfaceTextureHelper with GetJavaSurfaceTextureHelper().
// 3. Register a listener to the Java SurfaceListener and start producing
// new buffers.
// 4. Call CreateTextureFrame to wrap the Java texture in a VideoFrameBuffer.
class SurfaceTextureHelper : public rtc::RefCountInterface {
// Might return null if creating the Java SurfaceTextureHelper fails.
static rtc::scoped_refptr<SurfaceTextureHelper> create(
JNIEnv* jni, const char* thread_name, jobject j_egl_context);
jobject GetJavaSurfaceTextureHelper() const;
rtc::scoped_refptr<webrtc::VideoFrameBuffer> CreateTextureFrame(
int width,
int height,
const NativeHandleImpl& native_handle);
// May be called on arbitrary thread.
void ReturnTextureFrame() const;
SurfaceTextureHelper(JNIEnv* jni, jobject j_surface_texture_helper);
const ScopedGlobalRef<jobject> j_surface_texture_helper_;
const jmethodID j_return_texture_method_;
} // namespace webrtc_jni