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718112a8fe
Currently none of these is being used, but eventually they will, once more code gets ported over. So it's better to have them right away and avoid editing the project file too much, only to revert that later.
82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
// Super Nintendo SPC music file emulator
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// Game_Music_Emu https://bitbucket.org/mpyne/game-music-emu/
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#ifndef SPC_EMU_H
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#define SPC_EMU_H
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#include "Fir_Resampler.h"
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#include "Music_Emu.h"
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#include "Snes_Spc.h"
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#include "Spc_Filter.h"
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class Spc_Emu : public Music_Emu {
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public:
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// The Super Nintendo hardware samples at 32kHz. Other sample rates are
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// handled by resampling the 32kHz output; emulation accuracy is not affected.
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enum { native_sample_rate = 32000 };
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// SPC file header
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enum { header_size = 0x100 };
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struct header_t
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{
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char tag [35];
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byte format;
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byte version;
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byte pc [2];
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byte a, x, y, psw, sp;
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byte unused [2];
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char song [32];
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char game [32];
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char dumper [16];
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char comment [32];
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byte date [11];
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byte len_secs [3];
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byte fade_msec [4];
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char author [32]; // sometimes first char should be skipped (see official SPC spec)
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byte mute_mask;
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byte emulator;
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byte unused2 [46];
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};
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// Header for currently loaded file
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header_t const& header() const { return *(header_t const*) file_data; }
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// Prevents channels and global volumes from being phase-negated
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void disable_surround( bool disable = true );
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static gme_type_t static_type() { return gme_spc_type; }
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public:
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// deprecated
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using Music_Emu::load;
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blargg_err_t load( header_t const& h, Data_Reader& in ) // use Remaining_Reader
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{ return load_remaining_( &h, sizeof h, in ); }
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byte const* trailer() const; // use track_info()
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long trailer_size() const;
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public:
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Spc_Emu();
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~Spc_Emu();
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protected:
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blargg_err_t load_mem_( byte const*, long );
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blargg_err_t track_info_( track_info_t*, int track ) const;
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blargg_err_t set_sample_rate_( long );
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blargg_err_t start_track_( int );
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blargg_err_t play_( long, sample_t* );
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blargg_err_t skip_( long );
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void mute_voices_( int );
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void set_tempo_( double );
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void enable_accuracy_( bool );
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private:
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byte const* file_data;
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long file_size;
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Fir_Resampler<24> resampler;
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SPC_Filter filter;
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Snes_Spc apu;
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blargg_err_t play_and_filter( long count, sample_t out [] );
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};
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inline void Spc_Emu::disable_surround( bool b ) { apu.disable_surround( b ); }
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#endif
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