1 files changed, 385 insertions, 0 deletions
diff --git a/plugins/gme/game-music-emu-0.6pre/gme/Sap_Emu.cpp b/plugins/gme/game-music-emu-0.6pre/gme/Sap_Emu.cpp
new file mode 100644
index 00000000..ba2a164c
--- /dev/null
+++ b/plugins/gme/game-music-emu-0.6pre/gme/Sap_Emu.cpp
@@ -0,0 +1,385 @@
+// Game_Music_Emu 0.6-pre. http://www.slack.net/~ant/
+
+#include "Sap_Emu.h"
+
+#include "blargg_endian.h"
+
+/* Copyright (C) 2006-2008 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"
+
+Sap_Emu::Sap_Emu()
+{
+	set_type( gme_sap_type );
+	set_silence_lookahead( 6 );
+}
+
+Sap_Emu::~Sap_Emu() { }
+
+// Track info
+
+// Returns 16 or greater if not hex. Handles uppercase and lowercase.
+// Thoroughly tested and rejects ALL non-hex characters.
+inline int from_hex_char( int h )
+{
+	h -= 0x30;
+	if ( (unsigned) h > 9 )
+		h = ((h - 0x11) & 0xDF) + 10;
+	return h;
+}
+
+static int from_hex( byte const in [] )
+{
+	int result = 0;
+	for ( int n = 4; n--; )
+	{
+		int h = from_hex_char( *in++ );
+		if ( h > 15 )
+			return -1;
+		result = result * 0x10 + h;
+	}
+	return result;
+}
+
+static int parse_int( byte const* io [], byte const* end )
+{
+	byte const* in = *io;
+	int n = 0;
+	while ( in < end )
+	{
+		int dig = *in - '0';
+		if ( (unsigned) dig > 9 )
+			break;
+		++in;
+		n = n * 10 + dig;
+	}
+	if ( in == *io )
+		n = -1; // no numeric characters
+	*io = in;
+	return n;
+}
+
+static int from_dec( byte const in [], byte const* end )
+{
+	int n = parse_int( &in, end );
+	if ( in < end )
+		n = -1;
+	return n;
+}
+
+static void parse_string( byte const in [], byte const* end, int len, char out [] )
+{
+	byte const* start = in;
+	if ( *in++ == '\"' )
+	{
+		start++;
+		while ( in < end && *in != '\"' )
+			in++;
+	}
+	else
+	{
+		in = end;
+	}
+	len = min( len - 1, int (in - start) );
+	out [len] = 0;
+	memcpy( out, start, len );
+}
+
+static int parse_time( byte const in [], byte const* end )
+{
+	int minutes = parse_int( &in, end );
+	if ( minutes < 0 || *in != ':' )
+		return 0;
+	
+	++in;
+	int seconds = parse_int( &in, end );
+	if ( seconds < 0 )
+		return 0;
+	
+	int time = minutes * 60000 + seconds * 1000;
+	if ( *in == '.' )
+	{
+		byte const* start = ++in;
+		int msec = parse_int( &in, end );
+		if ( msec >= 0 )
+		{
+			// allow 1-3 digits
+			for ( int n = in - start; n < 3; n++ )
+				msec *= 10;
+			time += msec;
+		}
+	}
+	
+	while ( in < end && *in <= ' ' )
+		++in;
+	
+	if ( end - in >= 4 && !memcmp( in, "LOOP", 4 ) )
+		time = -time;
+	
+	return time;
+}
+
+static blargg_err_t parse_info( byte const in [], int size, Sap_Emu::info_t* out )
+{
+	out->track_count   = 1;
+	out->author    [0] = 0;
+	out->name      [0] = 0;
+	out->copyright [0] = 0;
+	
+	for ( int i = 0; i < Sap_Emu::max_tracks; i++ )
+		out->track_times [i] = 0;
+	
+	if ( size < 16 || memcmp( in, "SAP\x0D\x0A", 5 ) )
+		return blargg_err_file_type;
+	
+	int time_count = 0;
+	byte const* file_end = in + size - 5;
+	in += 5;
+	while ( in < file_end && (in [0] != 0xFF || in [1] != 0xFF) )
+	{
+		byte const* line_end = in;
+		while ( line_end < file_end && *line_end != 0x0D )
+			line_end++;
+		
+		char const* tag = (char const*) in;
+		while ( in < line_end && *in > ' ' )
+			in++;
+		int tag_len = (char const*) in - tag;
+		
+		while ( in < line_end && *in <= ' ' ) in++;
+		
+		if ( tag_len <= 0 )
+		{
+			// skip line
+		}
+		else if ( !strncmp( "TIME", tag, tag_len ) && time_count < Sap_Emu::max_tracks )
+		{
+			out->track_times [time_count++] = parse_time( in, line_end );
+		}
+		else if ( !strncmp( "INIT", tag, tag_len ) )
+		{
+			out->init_addr = from_hex( in );
+			if ( (unsigned) out->init_addr >= 0x10000 )
+				return BLARGG_ERR( BLARGG_ERR_FILE_CORRUPT, "init address" );
+		}
+		else if ( !strncmp( "PLAYER", tag, tag_len ) )
+		{
+			out->play_addr = from_hex( in );
+			if ( (unsigned) out->play_addr >= 0x10000 )
+				return BLARGG_ERR( BLARGG_ERR_FILE_CORRUPT, "play address" );
+		}
+		else if ( !strncmp( "MUSIC", tag, tag_len ) )
+		{
+			out->music_addr = from_hex( in );
+			if ( (unsigned) out->music_addr >= 0x10000 )
+				return BLARGG_ERR( BLARGG_ERR_FILE_CORRUPT, "music address" );
+		}
+		else if ( !strncmp( "SONGS", tag, tag_len ) )
+		{
+			out->track_count = from_dec( in, line_end );
+			if ( out->track_count <= 0 )
+				return BLARGG_ERR( BLARGG_ERR_FILE_CORRUPT, "track count" );
+		}
+		else if ( !strncmp( "TYPE", tag, tag_len ) )
+		{
+			switch ( out->type = *in )
+			{
+			case 'S':
+				out->type = 'C';
+			case 'B':
+			case 'C':
+			case 'D':
+				break;
+			
+			default:
+				return BLARGG_ERR( BLARGG_ERR_FILE_FEATURE, "player type" );
+			}
+		}
+		else if ( !strncmp( "STEREO", tag, tag_len ) )
+		{
+			out->stereo = true;
+		}
+		else if ( !strncmp( "FASTPLAY", tag, tag_len ) )
+		{
+			out->fastplay = from_dec( in, line_end );
+			if ( out->fastplay <= 0 )
+				return BLARGG_ERR( BLARGG_ERR_FILE_CORRUPT, "fastplay value" );
+		}
+		else if ( !strncmp( "AUTHOR", tag, tag_len ) )
+		{
+			parse_string( in, line_end, sizeof out->author, out->author );
+		}
+		else if ( !strncmp( "NAME", tag, tag_len ) )
+		{
+			parse_string( in, line_end, sizeof out->name, out->name );
+		}
+		else if ( !strncmp( "DATE", tag, tag_len ) )
+		{
+			parse_string( in, line_end, sizeof out->copyright, out->copyright );
+		}
+		
+		in = line_end + 2;
+	}
+	
+	if ( in [0] != 0xFF || in [1] != 0xFF )
+		return BLARGG_ERR( BLARGG_ERR_FILE_CORRUPT, "ROM data missing" );
+	out->rom_data = in + 2;
+	
+	return blargg_ok;
+}
+
+static void copy_sap_fields( Sap_Emu::info_t const& in, track_info_t* out )
+{
+	Gme_File::copy_field_( out->game,      in.name );
+	Gme_File::copy_field_( out->author,    in.author );
+	Gme_File::copy_field_( out->copyright, in.copyright );
+}
+
+blargg_err_t Sap_Emu::track_info_( track_info_t* out, int track ) const
+{
+	copy_sap_fields( info_, out );
+	
+	if ( track < max_tracks )
+	{
+		int time = info_.track_times [track];
+		if ( time )
+		{
+			if ( time > 0 )
+			{
+				out->loop_length = 0;
+			}
+			else
+			{
+				time = -time;
+				out->loop_length = time;
+			}
+			out->length = time;
+		}
+	}
+	return blargg_ok;
+}
+
+struct Sap_File : Gme_Info_
+{
+	Sap_Emu::info_t info;
+	
+	Sap_File() { set_type( gme_sap_type ); }
+	
+	blargg_err_t load_mem_( byte const begin [], int size )
+	{
+		RETURN_ERR( parse_info( begin, size, &info ) );
+		set_track_count( info.track_count );
+		return blargg_ok;
+	}
+	
+	blargg_err_t track_info_( track_info_t* out, int ) const
+	{
+		copy_sap_fields( info, out );
+		return blargg_ok;
+	}
+};
+
+static Music_Emu* new_sap_emu () { return BLARGG_NEW Sap_Emu ; }
+static Music_Emu* new_sap_file() { return BLARGG_NEW Sap_File; }
+
+gme_type_t_ const gme_sap_type [1] = {{ "Atari XL", 0, &new_sap_emu, &new_sap_file, "SAP", 1 }};
+
+// Setup
+
+blargg_err_t Sap_Emu::load_mem_( byte const in [], int size )
+{
+	file_end = in + size;
+	
+	info_.warning    = NULL;
+	info_.type       = 'B';
+	info_.stereo     = false;
+	info_.init_addr  = -1;
+	info_.play_addr  = -1;
+	info_.music_addr = -1;
+	info_.fastplay   = 312;
+	RETURN_ERR( parse_info( in, size, &info_ ) );
+	
+	set_warning( info_.warning );
+	set_track_count( info_.track_count );
+	set_voice_count( Sap_Apu::osc_count << info_.stereo );
+	core.apu_impl().volume( gain() );
+	
+	static const char* const names [Sap_Apu::osc_count * 2] = {
+		"Wave 1", "Wave 2", "Wave 3", "Wave 4",
+		"Wave 5", "Wave 6", "Wave 7", "Wave 8",
+	};
+	set_voice_names( names );
+	
+	static int const types [Sap_Apu::osc_count * 2] = {
+		wave_type+1, wave_type+2, wave_type+3, wave_type+0,
+		wave_type+5, wave_type+6, wave_type+7, wave_type+4,
+	};
+	set_voice_types( types );
+	
+	return setup_buffer( 1773447 );
+}
+
+void Sap_Emu::update_eq( blip_eq_t const& eq )
+{
+	core.apu_impl().synth.treble_eq( eq );
+}
+
+void Sap_Emu::set_voice( int i, Blip_Buffer* center, Blip_Buffer* left, Blip_Buffer* right )
+{
+	int i2 = i - Sap_Apu::osc_count;
+	if ( i2 >= 0 )
+		core.apu2().set_output( i2, right );
+	else
+		core.apu().set_output( i, (info_.stereo ? left : center) );
+}
+
+// Emulation
+
+void Sap_Emu::set_tempo_( double t )
+{
+	core.set_tempo( t );
+}
+
+blargg_err_t Sap_Emu::start_track_( int track )
+{
+	RETURN_ERR( Classic_Emu::start_track_( track ) );
+	
+	core.setup_ram();
+	
+	// Copy file data to RAM
+	byte const* in = info_.rom_data;
+	while ( file_end - in >= 5 )
+	{
+		int start = get_le16( in );
+		int end   = get_le16( in + 2 );
+		//dprintf( "Block $%04X-$%04X\n", start, end );
+		in += 4;
+		int len = end - start + 1;
+		if ( (unsigned) len > (unsigned) (file_end - in) )
+		{
+			set_warning( "Invalid file data block" );
+			break;
+		}
+		
+		memcpy( core.ram() + start, in, len );
+		in += len;
+		if ( file_end - in >= 2 && in [0] == 0xFF && in [1] == 0xFF )
+			in += 2;
+	}
+	
+	return core.start_track( track, info_ );
+}
+
+blargg_err_t Sap_Emu::run_clocks( blip_time_t& duration, int )
+{
+	return core.end_frame( duration );
+}