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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_COMMON_ANDROID_SURFACE_TEXTURE_BRIDGE_H_
#define CONTENT_COMMON_ANDROID_SURFACE_TEXTURE_BRIDGE_H_
#pragma once
#include <jni.h>
#include "base/android/scoped_java_ref.h"
#include "base/callback.h"
namespace content {
// This class serves as a bridge for native code to call java functions inside
// android SurfaceTexture class.
class SurfaceTextureBridge {
public:
explicit SurfaceTextureBridge(int texture_id);
~SurfaceTextureBridge();
// Set the listener callback, which will be invoked on the same thread that
// is being called from here for registration.
// Note: Since callbacks come in from Java objects that might outlive objects
// being referenced from the callback, the only robust way here is to create
// the callback from a weak pointer to your object.
void SetFrameAvailableCallback(const base::Closure& callback);
// Update the texture image to the most recent frame from the image stream.
void UpdateTexImage();
// Retrieve the 4x4 texture coordinate transform matrix associated with the
// texture image set by the most recent call to updateTexImage.
void GetTransformMatrix(float mtx[16]);
// Set the default size of the image buffers.
void SetDefaultBufferSize(int width, int height);
int texture_id() const {
return texture_id_;
}
const base::android::JavaRef<jobject>& j_surface_texture() const {
return j_surface_texture_;
}
private:
const int texture_id_;
// Java SurfaceTexture class and instance.
base::android::ScopedJavaGlobalRef<jclass> j_class_;
base::android::ScopedJavaGlobalRef<jobject> j_surface_texture_;
DISALLOW_COPY_AND_ASSIGN(SurfaceTextureBridge);
};
} // namespace content
#endif // CONTENT_COMMON_ANDROID_SURFACE_TEXTURE_BRIDGE_H_
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