/*
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* buffer_pool.h - buffer pool
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*
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* Copyright (c) 2014-2015 Intel Corporation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* Author: Wind Yuan <feng.yuan@intel.com>
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*/
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#ifndef XCAM_BUFFER_POOL_H
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#define XCAM_BUFFER_POOL_H
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#include <xcam_std.h>
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#include <safe_list.h>
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#include <video_buffer.h>
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namespace XCam {
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class BufferPool;
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class BufferData {
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protected:
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explicit BufferData () {}
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public:
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virtual ~BufferData () {}
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virtual uint8_t *map () { return nullptr; };
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virtual bool unmap () { return false; };
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virtual int get_fd () {
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return -1;
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}
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private:
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XCAM_DEAD_COPY (BufferData);
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};
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class BufferProxy
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: public VideoBuffer
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{
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public:
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explicit BufferProxy (const VideoBufferInfo &info, const SmartPtr<BufferData> &data);
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explicit BufferProxy (const SmartPtr<BufferData> &data);
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virtual ~BufferProxy ();
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void set_buf_pool (const SmartPtr<BufferPool> &pool) {
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_pool = pool;
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}
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// derived from VideoBuffer
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virtual uint8_t *map ();
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virtual bool unmap ();
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virtual int get_fd();
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protected:
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SmartPtr<BufferData> &get_buffer_data () {
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return _data;
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}
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private:
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XCAM_DEAD_COPY (BufferProxy);
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private:
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SmartPtr<BufferData> _data;
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SmartPtr<BufferPool> _pool;
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};
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class BufferPool
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: public RefObj
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{
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friend class BufferProxy;
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public:
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explicit BufferPool ();
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virtual ~BufferPool ();
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bool set_video_info (const VideoBufferInfo &info);
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bool reserve (uint32_t max_count = 4);
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SmartPtr<VideoBuffer> get_buffer (const SmartPtr<BufferPool> &self);
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SmartPtr<VideoBuffer> get_buffer ();
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void stop ();
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const VideoBufferInfo & get_video_info () const {
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return _buffer_info;
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}
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bool has_free_buffers () {
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return !_buf_list.is_empty ();
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}
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uint32_t get_free_buffer_size () {
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return _buf_list.size ();
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}
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protected:
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virtual bool fixate_video_info (VideoBufferInfo &info);
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virtual SmartPtr<BufferData> allocate_data (const VideoBufferInfo &buffer_info) = 0;
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virtual SmartPtr<BufferProxy> create_buffer_from_data (SmartPtr<BufferData> &data);
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bool add_data_unsafe (const SmartPtr<BufferData> &data);
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void update_video_info_unsafe (const VideoBufferInfo &info);
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private:
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void release (SmartPtr<BufferData> &data);
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XCAM_DEAD_COPY (BufferPool);
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protected:
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Mutex _mutex;
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VideoBufferInfo _buffer_info;
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SafeList<BufferData> _buf_list;
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uint32_t _allocated_num;
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uint32_t _max_count;
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bool _started;
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};
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};
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#endif //XCAM_BUFFER_POOL_H
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