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/*
* Copyright (C) 2013 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_IO_STREAM_BASE_H
#define ANDROID_SERVERS_CAMERA3_IO_STREAM_BASE_H
#include <utils/RefBase.h>
#include <gui/Surface.h>
#include "Camera3Stream.h"
namespace android {
namespace camera3 {
/**
* A base class for managing a single stream of I/O data from the camera device.
*/
class Camera3IOStreamBase :
public Camera3Stream {
protected:
Camera3IOStreamBase(int id, camera3_stream_type_t type,
uint32_t width, uint32_t height, size_t maxSize, int format);
public:
virtual ~Camera3IOStreamBase();
/**
* Camera3Stream interface
*/
virtual status_t waitUntilIdle(nsecs_t timeout);
virtual void dump(int fd, const Vector<String16> &args) const;
protected:
size_t mTotalBufferCount;
// sum of input and output buffers that are currently acquired by HAL
size_t mDequeuedBufferCount;
Condition mBufferReturnedSignal;
uint32_t mFrameCount;
// Last received output buffer's timestamp
nsecs_t mLastTimestamp;
// The merged release fence for all returned buffers
sp<Fence> mCombinedFence;
status_t returnAnyBufferLocked(
const camera3_stream_buffer &buffer,
nsecs_t timestamp,
bool output);
virtual status_t returnBufferCheckedLocked(
const camera3_stream_buffer &buffer,
nsecs_t timestamp,
bool output,
/*out*/
sp<Fence> *releaseFenceOut) = 0;
/**
* Internal Camera3Stream interface
*/
virtual bool hasOutstandingBuffersLocked() const;
virtual size_t getBufferCountLocked();
status_t getBufferPreconditionCheckLocked() const;
status_t returnBufferPreconditionCheckLocked() const;
// State check only
virtual status_t configureQueueLocked();
// State checks only
virtual status_t disconnectLocked();
// Hand out the buffer to a native location,
// incrementing the internal refcount and dequeued buffer count
void handoutBufferLocked(camera3_stream_buffer &buffer,
buffer_handle_t *handle,
int acquire_fence,
int release_fence,
camera3_buffer_status_t status);
}; // class Camera3IOStreamBase
} // namespace camera3
} // namespace android
#endif
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