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/*
* Copyright (C) 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 ANDROID_SERVERS_CAMERA3_DUMMY_STREAM_H
#define ANDROID_SERVERS_CAMERA3_DUMMY_STREAM_H
#include <utils/RefBase.h>
#include <gui/Surface.h>
#include "Camera3Stream.h"
#include "Camera3IOStreamBase.h"
#include "Camera3OutputStreamInterface.h"
namespace android {
namespace camera3 {
/**
* A dummy output stream class, to be used as a placeholder when no valid
* streams are configured by the client.
* This is necessary because camera HAL v3.2 or older disallow configuring
* 0 output streams, while the public camera2 API allows for it.
*/
class Camera3DummyStream :
public Camera3IOStreamBase,
public Camera3OutputStreamInterface {
public:
/**
* Set up a dummy stream; doesn't actually connect to anything, and uses
* a default dummy format and size.
*/
Camera3DummyStream(int id);
virtual ~Camera3DummyStream();
/**
* Camera3Stream interface
*/
virtual void dump(int fd, const Vector<String16> &args) const;
status_t setTransform(int transform);
/**
* Return if this output stream is for video encoding.
*/
bool isVideoStream() const;
protected:
/**
* Note that we release the lock briefly in this function
*/
virtual status_t returnBufferCheckedLocked(
const camera3_stream_buffer &buffer,
nsecs_t timestamp,
bool output,
/*out*/
sp<Fence> *releaseFenceOut);
virtual status_t disconnectLocked();
private:
// Default dummy parameters; 320x240 is a required size for all devices,
// otherwise act like a SurfaceView would.
static const int DUMMY_WIDTH = 320;
static const int DUMMY_HEIGHT = 240;
static const int DUMMY_FORMAT = HAL_PIXEL_FORMAT_IMPLEMENTATION_DEFINED;
static const android_dataspace DUMMY_DATASPACE = HAL_DATASPACE_UNKNOWN;
static const camera3_stream_rotation_t DUMMY_ROTATION = CAMERA3_STREAM_ROTATION_0;
static const uint32_t DUMMY_USAGE = GRALLOC_USAGE_HW_COMPOSER;
/**
* Internal Camera3Stream interface
*/
virtual status_t getBufferLocked(camera3_stream_buffer *buffer);
virtual status_t returnBufferLocked(
const camera3_stream_buffer &buffer,
nsecs_t timestamp);
virtual status_t configureQueueLocked();
virtual status_t getEndpointUsage(uint32_t *usage) const;
}; // class Camera3DummyStream
} // namespace camera3
} // namespace android
#endif
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