root/music2/wavfile.h

/*
 * wavfile.h  WAV file関連
 *
 *  Copyright: wavfile.c (c) Erik de Castro Lopo  erikd@zip.com.au
 *
 *  Modified : 1997-1998 Masaki Chikama (Wren) <chikama@kasumi.ipl.mech.nagoya-u.ac.jp>
 *             1998-                           <masaki-c@is.aist-nara.ac.jp>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
*/
#ifndef __WAVEFILE__
#define __WAVEFILE__

#define WW_BADOUTPUTFILE        1
#define WW_BADWRITEHEADER       2

#define WR_BADALLOC             3
#define WR_BADSEEK              4
#define WR_BADRIFF              5
#define WR_BADWAVE              6
#define WR_BADFORMAT            7
#define WR_BADFORMATSIZE        8

#define WR_NOTPCMFORMAT         9
#define WR_NODATACHUNK          10
#define WR_BADFORMATDATA        11

/*
 * These values represent values found in/or destined for a
 * WAV file.
 */
typedef struct {
        unsigned int SamplingRate;          /* Sampling rate in Hz */
        int     Channels;                       /* Mono or Stereo */
        unsigned short DataBits;            /* Sample bit size (8/12/16) */
} WAVINF;

struct WAVFILE{
        WAVINF wavinfo;                     /* WAV file hdr info */
        WAVFILE(void);
        static int freq;
        static int format;
        static int channels;
        virtual ~WAVFILE() {};
        virtual int Read(char* buf, int blksize, int blklen) = 0;
        virtual void Seek(int count) = 0;
        static WAVFILE* MakeConverter(WAVFILE* new_reader);
};

struct WAVFILE_Converter : WAVFILE {
        WAVFILE* original;
        struct SDL_AudioCVT* cvt;
        int datasize;
        char* tmpbuf;
        int Read(char* buf, int blksize, int blklen);
        void Seek(int count) { original->Seek(count);}
        WAVFILE_Converter(WAVFILE* orig, struct SDL_AudioCVT* cvt);
        ~WAVFILE_Converter();
};

struct WAVFILE_Stream : WAVFILE{
        char *data;                             /* real data */ 
        char *data_orig;
        int data_length;
        FILE* stream;
        int stream_length;
        int stream_length_orig;
        int stream_top;
        int Read(char* buf, int blksize, int blklen);
        void Seek(int count);
        WAVFILE_Stream(FILE* stream, int length);
        ~WAVFILE_Stream();
};

struct NWAFILE : WAVFILE {
        int skip_count;
        FILE* stream;
        struct NWAData* nwa;
        char* data;
        int block_size;
        int data_len;

        NWAFILE(FILE* stream);
        ~NWAFILE();
        void Seek(int count);
        int Read(char* buf, int blksize, int blklen);
        static char* ReadAll(FILE* stream, int& size);
};

struct OggFILE : WAVFILE {
        struct OggFILE_impl* pimpl;

        OggFILE(FILE* stream, int size);
        ~OggFILE();
        void Seek(int count);
        int Read(char* buf, int blksize, int blklen);
};

struct MP3FILE : WAVFILE {
        struct MP3FILE_impl* pimpl;

        MP3FILE(FILE* stream, int size);
        ~MP3FILE();
        void Seek(int count);
        int Read(char* buf, int blksize, int blklen);
};

#endif /* !__WAVEFILE__ */