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// Game_Music_Emu 0.6-pre. http://www.slack.net/~ant/
#include "Gbs_Emu.h"
/* Copyright (C) 2003-2009 Shay Green. This module is free software; you
can redistribute it and/or modify it under the terms of the GNU Lesser
General Public License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version. This
module 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 Lesser General Public License for more
details. You should have received a copy of the GNU Lesser General Public
License along with this module; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */
#include "blargg_source.h"
Gbs_Emu::equalizer_t const Gbs_Emu::handheld_eq = { -47.0, 2000 };
Gbs_Emu::equalizer_t const Gbs_Emu::cgb_eq = { 0.0, 300 };
Gbs_Emu::equalizer_t const Gbs_Emu::headphones_eq = { 0.0, 30 }; // DMG
Gbs_Emu::Gbs_Emu()
{
sound_hardware = sound_gbs;
enable_clicking( false );
set_type( gme_gbs_type );
set_silence_lookahead( 6 );
set_max_initial_silence( 21 );
set_gain( 1.2 );
// kind of midway between headphones and speaker
static equalizer_t const eq = { -1.0, 120 };
set_equalizer( eq );
}
Gbs_Emu::~Gbs_Emu() { }
void Gbs_Emu::unload()
{
core_.unload();
Music_Emu::unload();
}
// Track info
static void copy_gbs_fields( Gbs_Emu::header_t const& h, track_info_t* out )
{
GME_COPY_FIELD( h, out, game );
GME_COPY_FIELD( h, out, author );
GME_COPY_FIELD( h, out, copyright );
}
blargg_err_t Gbs_Emu::track_info_( track_info_t* out, int ) const
{
copy_gbs_fields( header(), out );
return blargg_ok;
}
struct Gbs_File : Gme_Info_
{
Gbs_Emu::header_t h;
Gbs_File() { set_type( gme_gbs_type ); }
blargg_err_t load_( Data_Reader& in )
{
blargg_err_t err = in.read( &h, h.size );
if ( err )
return (blargg_is_err_type( err, blargg_err_file_eof ) ? blargg_err_file_type : err);
set_track_count( h.track_count );
if ( !h.valid_tag() )
return blargg_err_file_type;
return blargg_ok;
}
blargg_err_t track_info_( track_info_t* out, int ) const
{
copy_gbs_fields( h, out );
return blargg_ok;
}
};
static Music_Emu* new_gbs_emu () { return BLARGG_NEW Gbs_Emu ; }
static Music_Emu* new_gbs_file() { return BLARGG_NEW Gbs_File; }
gme_type_t_ const gme_gbs_type [1] = {{ "Game Boy", 0, &new_gbs_emu, &new_gbs_file, "GBS", 1 }};
// Setup
blargg_err_t Gbs_Emu::load_( Data_Reader& in )
{
RETURN_ERR( core_.load( in ) );
set_warning( core_.warning() );
set_track_count( header().track_count );
set_voice_count( Gb_Apu::osc_count );
core_.apu().volume( gain() );
static const char* const names [Gb_Apu::osc_count] = {
"Square 1", "Square 2", "Wave", "Noise"
};
set_voice_names( names );
static int const types [Gb_Apu::osc_count] = {
wave_type+1, wave_type+2, wave_type+3, mixed_type+1
};
set_voice_types( types );
return setup_buffer( 4194304 );
}
void Gbs_Emu::update_eq( blip_eq_t const& eq )
{
core_.apu().treble_eq( eq );
}
void Gbs_Emu::set_voice( int i, Blip_Buffer* c, Blip_Buffer* l, Blip_Buffer* r )
{
core_.apu().set_output( i, c, l, r );
}
void Gbs_Emu::set_tempo_( double t )
{
core_.set_tempo( t );
}
blargg_err_t Gbs_Emu::start_track_( int track )
{
sound_t mode = sound_hardware;
if ( mode == sound_gbs )
mode = (header().timer_mode & 0x80) ? sound_cgb : sound_dmg;
RETURN_ERR( core_.start_track( track, (Gb_Apu::mode_t) mode ) );
// clear buffer AFTER track is started, eliminating initial click
return Classic_Emu::start_track_( track );
}
blargg_err_t Gbs_Emu::run_clocks( blip_time_t& duration, int )
{
return core_.end_frame( duration );
}
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