qzdoom/src/sound/mpg123_decoder.h

#ifndef MPG123_DECODER_H
#define MPG123_DECODER_H

#include "i_soundinternal.h"

#ifdef HAVE_MPG123

#include "mpg123.h"

struct MPG123Decoder : public SoundDecoder
{
    virtual void getInfo(int *samplerate, ChannelConfig *chans, SampleType *type);

    virtual size_t read(char *buffer, size_t bytes);
    virtual bool seek(size_t ms_offset);
    virtual size_t getSampleOffset();

    MPG123Decoder() : MPG123(0), File(0) { }
    virtual ~MPG123Decoder();

protected:
    virtual bool open(const char *data, size_t length);
    virtual bool open(const char *fname, size_t offset, size_t length);

private:
    mpg123_handle *MPG123;
    bool Done;

    FILE *File;
    size_t FileLength;
    size_t FileOffset;
    static off_t file_lseek(void *handle, off_t offset, int whence);
    static ssize_t file_read(void *handle, void *buffer, size_t bytes);

    const char *MemData;
    size_t MemLength;
    size_t MemPos;
    static off_t mem_lseek(void *handle, off_t offset, int whence);
    static ssize_t mem_read(void *handle, void *buffer, size_t bytes);

    // Make non-copyable
    MPG123Decoder(const MPG123Decoder &rhs);
    MPG123Decoder& operator=(const MPG123Decoder &rhs);
};

#endif

#endif /* MPG123_DECODER_H */