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/*
* buffer_pool.h - buffer pool
*
* Copyright (c) 2014-2015 Intel Corporation
*
* 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.
*
* Author: Wind Yuan <feng.yuan@intel.com>
*/
#ifndef XCAM_BUFFER_POOL_H
#define XCAM_BUFFER_POOL_H
#include <xcam_std.h>
#include <safe_list.h>
#include <video_buffer.h>
namespace XCam {
class BufferPool;
class BufferData {
protected:
explicit BufferData () {}
public:
virtual ~BufferData () {}
virtual uint8_t *map () = 0;
virtual bool unmap () = 0;
virtual int get_fd () {
return -1;
}
private:
XCAM_DEAD_COPY (BufferData);
};
class BufferProxy
: public VideoBuffer
{
public:
explicit BufferProxy (const VideoBufferInfo &info, const SmartPtr<BufferData> &data);
explicit BufferProxy (const SmartPtr<BufferData> &data);
virtual ~BufferProxy ();
void set_buf_pool (const SmartPtr<BufferPool> &pool) {
_pool = pool;
}
// derived from VideoBuffer
virtual uint8_t *map ();
virtual bool unmap ();
virtual int get_fd();
protected:
SmartPtr<BufferData> &get_buffer_data () {
return _data;
}
const SmartPtr<BufferData> &get_buffer_data () const {
return _data;
}
private:
XCAM_DEAD_COPY (BufferProxy);
private:
SmartPtr<BufferData> _data;
SmartPtr<BufferPool> _pool;
};
class BufferPool
: public RefObj
{
friend class BufferProxy;
public:
explicit BufferPool ();
virtual ~BufferPool ();
bool set_video_info (const VideoBufferInfo &info);
bool reserve (uint32_t max_count = 4);
SmartPtr<VideoBuffer> get_buffer (const SmartPtr<BufferPool> &self);
SmartPtr<VideoBuffer> get_buffer ();
void stop ();
const VideoBufferInfo & get_video_info () const {
return _buffer_info;
}
bool has_free_buffers () {
return !_buf_list.is_empty ();
}
uint32_t get_free_buffer_size () {
return _buf_list.size ();
}
protected:
virtual bool fixate_video_info (VideoBufferInfo &info);
virtual SmartPtr<BufferData> allocate_data (const VideoBufferInfo &buffer_info) = 0;
virtual SmartPtr<BufferProxy> create_buffer_from_data (SmartPtr<BufferData> &data);
bool add_data_unsafe (const SmartPtr<BufferData> &data);
void update_video_info_unsafe (const VideoBufferInfo &info);
private:
void release (SmartPtr<BufferData> &data);
XCAM_DEAD_COPY (BufferPool);
private:
Mutex _mutex;
VideoBufferInfo _buffer_info;
SafeList<BufferData> _buf_list;
uint32_t _allocated_num;
uint32_t _max_count;
bool _started;
};
class VKDevice;
SmartPtr<BufferPool> create_vk_buffer_pool (const SmartPtr<VKDevice> &dev);
};
#endif //XCAM_BUFFER_POOL_H
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