writer.h

Linux下比较早的基于命令行的DVD播放器

//
// Copyright (c) 2003 by Istv醤 V醨adi
//
// This file is part of dxr3Player, a DVD player written specifically 
// for the DXR3 (aka Hollywood+) decoder card.

// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

#ifndef DXR3PLAYER_IFODUMP_WRITER_H
#define DXR3PLAYER_IFODUMP_WRITER_H
//------------------------------------------------------------------------------

#include "dvd/DVDDump.h"

#include "util/FileWriter.h"

extern "C" {

#include <libmpdvdkit/ifo_types.h>

}

//------------------------------------------------------------------------------

namespace ifodump {

//------------------------------------------------------------------------------

/**
 * Base class for different writers.
 */
template <class Leaf>
class Writer : public FileWriter
{
protected:
    /**
     * The current dump version.
     */
    unsigned version;

public:
    /**
     * Construct the writer.
     */
    Writer(FILE* file);

    /**
     * Write a pointer to a given structure. A byte of 0 is written,
     * if the pointer is 0. A byte of 1, followed by the pointed
     * structure is written if the pointer is valid.
     */
    template <typename T>
    void writePointer(const T* ptr);

    /**
     * Write an array's size and the array itself. If the array
     * pointer is 0, a 0 size is written as well.
     */
    template <typename T>
    void writeArray(uint32_t size, const T* array);

    /**
     * Write a fixed array. 
     */
    template <typename T>
    void writeFixedArray(size_t size, const T* array);

    /**
     * Write an array the size of which is determined by a "last byte"
     * member. 
     */
    template <typename T>
    void writeLastArray(uint32_t lastByte, const T* array);

    /**
     * Write a VM command.
     */
    void write(const vm_cmd_t& cmd);

    /**
     * Write a user operations structure.
     */
    void write(const user_ops_t& userOperations);
};

//------------------------------------------------------------------------------
// Inline and template definitions
//------------------------------------------------------------------------------

template <class Leaf>
inline Writer<Leaf>::Writer(FILE* file) :
    FileWriter(file),
    version(dvd::DVDDump::currentVersion)
{
}

//------------------------------------------------------------------------------

template <class Leaf>
template <typename T>
void Writer<Leaf>::writePointer(const T* ptr)
{
    if (ptr==0) FileWriter::write( (uint8_t)0 );
    else {
        FileWriter::write( (uint8_t)1 );
        static_cast<Leaf*>(this)->write(*ptr);
    }
}

//------------------------------------------------------------------------------

template <class Leaf>
template <typename T>
void Writer<Leaf>::writeArray(uint32_t size, const T* array)
{
    if (array==0) {
        size = 0;
    }

    FileWriter::write(size);
    
    for(size_t i = 0; i<size; ++i) {
        static_cast<Leaf*>(this)->write(array[i]);
    }
}

//------------------------------------------------------------------------------

template <class Leaf>
template <typename T>
void Writer<Leaf>::writeFixedArray(size_t size, const T* array)
{
    size_t numEntries = size / sizeof(T);

    for(size_t i = 0; i<numEntries; ++i) {
        static_cast<Leaf*>(this)->write(array[i]);
    }
}

//------------------------------------------------------------------------------

template <class Leaf>
template <typename T>
inline void Writer<Leaf>::writeLastArray(uint32_t lastByte, const T* array)
{
    FileWriter::write(lastByte);
    writeFixedArray(lastByte, array);
}

//------------------------------------------------------------------------------

template <class Leaf>
inline void Writer<Leaf>::write(const vm_cmd_t& cmd)
{
    FileWriter::write(cmd.bytes, sizeof(cmd.bytes));
}

//------------------------------------------------------------------------------

template <class Leaf>
inline void Writer<Leaf>::write(const user_ops_t& userOperations)
{
    FileWriter::write(&userOperations, sizeof(userOperations));
}

//------------------------------------------------------------------------------

} /* namespace ifodump */

//------------------------------------------------------------------------------
#endif // IFODUMP_WRITER_H

// Local variables:
// mode: c++
// End: