1/*
2 * Copyright 2014 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 SCREENRECORD_FRAMEOUTPUT_H
18#define SCREENRECORD_FRAMEOUTPUT_H
19
20#include "Program.h"
21#include "EglWindow.h"
22
23#include <gui/BufferQueue.h>
24#include <gui/GLConsumer.h>
25
26namespace android {
27
28/*
29 * Support for "frames" output format.
30 */
31class FrameOutput : public GLConsumer::FrameAvailableListener {
32public:
33    FrameOutput() : mFrameAvailable(false),
34        mExtTextureName(0),
35        mPixelBuf(NULL)
36        {}
37
38    // Create an "input surface", similar in purpose to a MediaCodec input
39    // surface, that the virtual display can send buffers to.  Also configures
40    // EGL with a pbuffer surface on the current thread.
41    status_t createInputSurface(int width, int height,
42            sp<IGraphicBufferProducer>* pBufferProducer);
43
44    // Copy one from input to output.  If no frame is available, this will wait up to the
45    // specified number of microseconds.
46    //
47    // Returns ETIMEDOUT if the timeout expired before we found a frame.
48    status_t copyFrame(FILE* fp, long timeoutUsec, bool rawFrames);
49
50    // Prepare to copy frames.  Makes the EGL context used by this object current.
51    void prepareToCopy() {
52        mEglWindow.makeCurrent();
53    }
54
55private:
56    FrameOutput(const FrameOutput&);
57    FrameOutput& operator=(const FrameOutput&);
58
59    // Destruction via RefBase.
60    virtual ~FrameOutput() {
61        delete[] mPixelBuf;
62    }
63
64    // (overrides GLConsumer::FrameAvailableListener method)
65    virtual void onFrameAvailable(const BufferItem& item);
66
67    // Reduces RGBA to RGB, in place.
68    static void reduceRgbaToRgb(uint8_t* buf, unsigned int pixelCount);
69
70    // Put a 32-bit value into a buffer, in little-endian byte order.
71    static void setValueLE(uint8_t* buf, uint32_t value);
72
73    // Used to wait for the FrameAvailableListener callback.
74    Mutex mMutex;
75    Condition mEventCond;
76
77    // Set by the FrameAvailableListener callback.
78    bool mFrameAvailable;
79
80    // This receives frames from the virtual display and makes them available
81    // as an external texture.
82    sp<GLConsumer> mGlConsumer;
83
84    // EGL display / context / surface.
85    EglWindow mEglWindow;
86
87    // GL rendering support.
88    Program mExtTexProgram;
89
90    // External texture, updated by GLConsumer.
91    GLuint mExtTextureName;
92
93    // Pixel data buffer.
94    uint8_t* mPixelBuf;
95};
96
97}; // namespace android
98
99#endif /*SCREENRECORD_FRAMEOUTPUT_H*/
100