riff.h

#pragma once
 
#include <string>
#include <stdio.h>
#include <iostream>
 
#include "lib_begin.h"
 
namespace cgv {
    namespace media {
 
struct CGV_API fourcc
{
    static unsigned make_id(const std::string& ascii);
    unsigned id;
    fourcc(unsigned _id = 0) : id(_id) {}
    fourcc(const std::string& s) : id(make_id(s)) {}
    std::string to_string() const;
    bool operator == (const std::string& s) const;
    bool operator != (const std::string& s) const;
};
 
extern CGV_API std::ostream& operator << (std::ostream& os, const fourcc& f);
 
struct CGV_API riff_handler
{
    virtual bool begin_list_chunk(fourcc id, unsigned size, fourcc hdr);
 
    virtual bool process_chunk_header(fourcc id, unsigned size, void*& data_ptr);
    virtual void process_chunk_data(fourcc id, unsigned size, void* data_ptr);
    virtual void end_list_chunk(fourcc id, unsigned size, fourcc hdr);
};
 
class CGV_API riff_reader
{
protected:
    FILE* fp;
    riff_handler* rh;
    bool read_chunk_info(fourcc& f, unsigned& size);
    bool read_chunk_list(unsigned size);
    void close();
public:
    riff_reader(riff_handler* _rh);
    bool read(const std::string& file_name);
};
 
    }
}
 
#include <cgv/config/lib_end.h>