/*
 * v4l2_buffer_proxy.h - v4l2 buffer proxy
 *
 *  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_V4L2_BUFFER_PROXY_H
#define XCAM_V4L2_BUFFER_PROXY_H

#include "xcam_utils.h"
#include "buffer_pool.h"
#include "smartptr.h"
#include <linux/videodev2.h>

namespace XCam {

class V4l2Device;

class V4l2Buffer
    : public BufferData
{
public:
    explicit V4l2Buffer (const struct v4l2_buffer &buf, const struct v4l2_format &format);
    virtual ~V4l2Buffer ();

    const struct v4l2_buffer & get_buf () const {
        return _buf;
    }

    void set_timestamp (const struct timeval &time) {
        _buf.timestamp = time;
    }

    void set_timecode (const struct v4l2_timecode &code) {
        _buf.timecode = code;
    }

    void set_sequence (const uint32_t sequence) {
        _buf.sequence = sequence;
    }

    void set_length (const uint32_t value) {
        _buf.length = value;
    }

    void reset () {
        xcam_mem_clear (_buf.timestamp);
        xcam_mem_clear (_buf.timecode);
        _buf.sequence = 0;
        //_buf.length = 0;
    }

    const struct v4l2_format & get_format () const {
        return _format;
    }

    // derived from BufferData
    virtual uint8_t *map ();
    virtual bool unmap ();
    virtual int get_fd ();

private:
    XCAM_DEAD_COPY (V4l2Buffer);

private:
    struct v4l2_buffer  _buf;
    struct v4l2_format  _format;
};

class V4l2BufferProxy
    : public BufferProxy
{
public:
    explicit V4l2BufferProxy (SmartPtr<V4l2Buffer> &buf, SmartPtr<V4l2Device> &device);

    ~V4l2BufferProxy ();

    int get_v4l2_buf_index () {
        return get_v4l2_buf().index;
    }

    enum v4l2_memory get_v4l2_mem_type () {
        return (enum v4l2_memory)(get_v4l2_buf().memory);
    }

    int get_v4l2_buf_length () {
        return get_v4l2_buf().length;
    }

    int get_v4l2_dma_fd () {
        return get_v4l2_buf().m.fd;
    }

    uintptr_t get_v4l2_userptr () {
        return get_v4l2_buf().m.userptr;
    }

private:
    const struct v4l2_buffer & get_v4l2_buf ();

    void v4l2_format_to_video_info (
        const struct v4l2_format &format, VideoBufferInfo &info);

    XCAM_DEAD_COPY (V4l2BufferProxy);

private:
    SmartPtr<V4l2Device>  _device;
};
};

#endif //XCAM_V4L2_BUFFER_PROXY_H