mirror of
https://github.com/ZDoom/gzdoom-gles.git
synced 2024-11-24 13:11:33 +00:00
127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
// Common aspects of emulators which use Blip_Buffer for sound output
|
|
|
|
// Game_Music_Emu 0.6.0
|
|
#ifndef CLASSIC_EMU_H
|
|
#define CLASSIC_EMU_H
|
|
|
|
#include "blargg_common.h"
|
|
#include "Blip_Buffer.h"
|
|
#include "Music_Emu.h"
|
|
|
|
class Classic_Emu : public Music_Emu {
|
|
public:
|
|
Classic_Emu();
|
|
~Classic_Emu();
|
|
void set_buffer( Multi_Buffer* );
|
|
protected:
|
|
// Services
|
|
enum { wave_type = 0x100, noise_type = 0x200, mixed_type = wave_type | noise_type };
|
|
void set_voice_types( int const* t ) { voice_types = t; }
|
|
blargg_err_t setup_buffer( long clock_rate );
|
|
long clock_rate() const { return clock_rate_; }
|
|
void change_clock_rate( long ); // experimental
|
|
|
|
// Overridable
|
|
virtual void set_voice( int index, Blip_Buffer* center,
|
|
Blip_Buffer* left, Blip_Buffer* right ) = 0;
|
|
virtual void update_eq( blip_eq_t const& ) = 0;
|
|
virtual blargg_err_t start_track_( int track ) = 0;
|
|
virtual blargg_err_t run_clocks( blip_time_t& time_io, int msec ) = 0;
|
|
protected:
|
|
blargg_err_t set_sample_rate_( long sample_rate );
|
|
void mute_voices_( int );
|
|
void set_equalizer_( equalizer_t const& );
|
|
blargg_err_t play_( long, sample_t* );
|
|
private:
|
|
Multi_Buffer* buf;
|
|
Multi_Buffer* stereo_buffer; // NULL if using custom buffer
|
|
long clock_rate_;
|
|
unsigned buf_changed_count;
|
|
int const* voice_types;
|
|
};
|
|
|
|
inline void Classic_Emu::set_buffer( Multi_Buffer* new_buf )
|
|
{
|
|
assert( !buf && new_buf );
|
|
buf = new_buf;
|
|
}
|
|
|
|
// ROM data handler, used by several Classic_Emu derivitives. Loads file data
|
|
// with padding on both sides, allowing direct use in bank mapping. The main purpose
|
|
// is to allow all file data to be loaded with only one read() call (for efficiency).
|
|
|
|
class Rom_Data_ {
|
|
public:
|
|
typedef unsigned char byte;
|
|
protected:
|
|
enum { pad_extra = 8 };
|
|
blargg_vector<byte> rom;
|
|
long file_size_;
|
|
blargg_long rom_addr;
|
|
blargg_long mask;
|
|
blargg_long size_; // TODO: eliminate
|
|
|
|
blargg_err_t load_rom_data_( Data_Reader& in, int header_size, void* header_out,
|
|
int fill, long pad_size );
|
|
void set_addr_( long addr, int unit );
|
|
};
|
|
|
|
template<int unit>
|
|
class Rom_Data : public Rom_Data_ {
|
|
enum { pad_size = unit + pad_extra };
|
|
public:
|
|
// Load file data, using already-loaded header 'h' if not NULL. Copy header
|
|
// from loaded file data into *out and fill unmapped bytes with 'fill'.
|
|
blargg_err_t load( Data_Reader& in, int header_size, void* header_out, int fill )
|
|
{
|
|
return load_rom_data_( in, header_size, header_out, fill, pad_size );
|
|
}
|
|
|
|
// Size of file data read in (excluding header)
|
|
long file_size() const { return file_size_; }
|
|
|
|
// Pointer to beginning of file data
|
|
byte* begin() const { return rom.begin() + pad_size; }
|
|
|
|
// Set address that file data should start at
|
|
void set_addr( long addr ) { set_addr_( addr, unit ); }
|
|
|
|
// Free data
|
|
void clear() { rom.clear(); }
|
|
|
|
// Size of data + start addr, rounded to a multiple of unit
|
|
long size() const { return size_; }
|
|
|
|
// Pointer to unmapped page filled with same value
|
|
byte* unmapped() { return rom.begin(); }
|
|
|
|
// Mask address to nearest power of two greater than size()
|
|
blargg_long mask_addr( blargg_long addr ) const
|
|
{
|
|
#ifdef check
|
|
check( addr <= mask );
|
|
#endif
|
|
return addr & mask;
|
|
}
|
|
|
|
// Pointer to page starting at addr. Returns unmapped() if outside data.
|
|
byte* at_addr( blargg_long addr )
|
|
{
|
|
blargg_ulong offset = mask_addr( addr ) - rom_addr;
|
|
if ( offset > blargg_ulong (rom.size() - pad_size) )
|
|
offset = 0; // unmapped
|
|
return &rom [offset];
|
|
}
|
|
};
|
|
|
|
#ifndef GME_APU_HOOK
|
|
#define GME_APU_HOOK( emu, addr, data ) ((void) 0)
|
|
#endif
|
|
|
|
#ifndef GME_FRAME_HOOK
|
|
#define GME_FRAME_HOOK( emu ) ((void) 0)
|
|
#else
|
|
#define GME_FRAME_HOOK_DEFINED 1
|
|
#endif
|
|
|
|
#endif
|