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/*
* Copyright 2014 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef SCREENRECORD_FRAMEOUTPUT_H
#define SCREENRECORD_FRAMEOUTPUT_H
#include "Program.h"
#include "EglWindow.h"
#include <gui/BufferQueue.h>
#include <gui/GLConsumer.h>
namespace android {
/*
* Support for "frames" output format.
*/
class FrameOutput : public GLConsumer::FrameAvailableListener {
public:
FrameOutput() : mFrameAvailable(false),
mExtTextureName(0),
mPixelBuf(NULL)
{}
// Create an "input surface", similar in purpose to a MediaCodec input
// surface, that the virtual display can send buffers to. Also configures
// EGL with a pbuffer surface on the current thread.
status_t createInputSurface(int width, int height,
sp<IGraphicBufferProducer>* pBufferProducer);
// Copy one from input to output. If no frame is available, this will wait up to the
// specified number of microseconds.
//
// Returns ETIMEDOUT if the timeout expired before we found a frame.
status_t copyFrame(FILE* fp, long timeoutUsec, bool rawFrames);
// Prepare to copy frames. Makes the EGL context used by this object current.
void prepareToCopy() {
mEglWindow.makeCurrent();
}
private:
FrameOutput(const FrameOutput&);
FrameOutput& operator=(const FrameOutput&);
// Destruction via RefBase.
virtual ~FrameOutput() {
delete[] mPixelBuf;
}
// (overrides GLConsumer::FrameAvailableListener method)
virtual void onFrameAvailable();
// Reduces RGBA to RGB, in place.
static void reduceRgbaToRgb(uint8_t* buf, unsigned int pixelCount);
// Put a 32-bit value into a buffer, in little-endian byte order.
static void setValueLE(uint8_t* buf, uint32_t value);
// Used to wait for the FrameAvailableListener callback.
Mutex mMutex;
Condition mEventCond;
// Set by the FrameAvailableListener callback.
bool mFrameAvailable;
// This receives frames from the virtual display and makes them available
// as an external texture.
sp<GLConsumer> mGlConsumer;
// EGL display / context / surface.
EglWindow mEglWindow;
// GL rendering support.
Program mExtTexProgram;
// External texture, updated by GLConsumer.
GLuint mExtTextureName;
// Pixel data buffer.
uint8_t* mPixelBuf;
};
}; // namespace android
#endif /*SCREENRECORD_FRAMEOUTPUT_H*/
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