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Diffstat (limited to 'apps/codecs/libgme/ay_emu.h')
-rw-r--r--apps/codecs/libgme/ay_emu.h71
1 files changed, 34 insertions, 37 deletions
diff --git a/apps/codecs/libgme/ay_emu.h b/apps/codecs/libgme/ay_emu.h
index b320e69653..7334167876 100644
--- a/apps/codecs/libgme/ay_emu.h
+++ b/apps/codecs/libgme/ay_emu.h
@@ -10,14 +10,12 @@
10#include "z80_cpu.h" 10#include "z80_cpu.h"
11#include "ay_apu.h" 11#include "ay_apu.h"
12#include "m3u_playlist.h" 12#include "m3u_playlist.h"
13 13#include "track_filter.h"
14typedef short sample_t;
15 14
16// 64K memory to load code and data into before starting track. Caller 15// 64K memory to load code and data into before starting track. Caller
17// must parse the AY file. 16// must parse the AY file.
18enum { mem_size = 0x10000 }; 17enum { mem_size = 0x10000 };
19enum { ram_addr = 0x4000 }; // where official RAM starts 18enum { ram_addr = 0x4000 }; // where official RAM starts
20enum { buf_size = 2048 };
21 19
22// AY file header 20// AY file header
23enum { header_size = 0x14 }; 21enum { header_size = 0x14 };
@@ -62,43 +60,30 @@ struct Ay_Emu {
62 bool cpc_mode; 60 bool cpc_mode;
63 61
64 // general 62 // general
65 int max_initial_silence;
66 int voice_count; 63 int voice_count;
64 int const* voice_types;
67 int mute_mask_; 65 int mute_mask_;
68 int tempo; 66 int tempo;
69 int gain; 67 int gain;
70 68
71 long sample_rate; 69 int sample_rate;
72 70
73 // track-specific 71 // track-specific
74 int current_track; 72 int current_track;
75 int track_count; 73 int track_count;
76 blargg_long out_time; // number of samples played since start of track 74
77 blargg_long emu_time; // number of samples emulator has generated since start of track 75 int clock_rate_;
78 volatile bool track_ended;
79 bool emu_track_ended_; // emulator has reached end of track
80
81 // fading
82 blargg_long fade_start;
83 int fade_step;
84
85 // silence detection
86 bool ignore_silence;
87 int silence_lookahead; // speed to run emulator when looking ahead for silence
88 long silence_time; // number of samples where most recent silence began
89 long silence_count; // number of samples of silence to play before using buf
90 long buf_remain; // number of samples left in silence buffer
91
92 long clock_rate_;
93 unsigned buf_changed_count; 76 unsigned buf_changed_count;
94 77
95 // M3u Playlist 78 // M3u Playlist
96 struct M3u_Playlist m3u; 79 struct M3u_Playlist m3u;
97 80
98 // large items 81 // large items
82 struct setup_t tfilter;
83 struct Track_Filter track_filter;
84
99 struct Ay_Apu apu; 85 struct Ay_Apu apu;
100 sample_t buf [buf_size]; 86 struct Multi_Buffer stereo_buf; // NULL if using custom buffer
101 struct Stereo_Buffer stereo_buf; // NULL if using custom buffer
102 struct Z80_Cpu cpu; 87 struct Z80_Cpu cpu;
103 struct mem_t mem; 88 struct mem_t mem;
104}; 89};
@@ -106,46 +91,58 @@ struct Ay_Emu {
106// Basic functionality (see Gme_File.h for file loading/track info functions) 91// Basic functionality (see Gme_File.h for file loading/track info functions)
107void Ay_init( struct Ay_Emu* this ); 92void Ay_init( struct Ay_Emu* this );
108 93
109blargg_err_t Ay_load_mem( struct Ay_Emu* this, byte const in [], int size ); 94blargg_err_t Ay_load_mem( struct Ay_Emu* this, byte const in [], long size );
110 95
111// Set output sample rate. Must be called only once before loading file. 96// Set output sample rate. Must be called only once before loading file.
112blargg_err_t Ay_set_sample_rate( struct Ay_Emu* this, long sample_rate ); 97blargg_err_t Ay_set_sample_rate( struct Ay_Emu* this, int sample_rate );
113 98
114// Start a track, where 0 is the first track. Also clears warning string. 99// Start a track, where 0 is the first track. Also clears warning string.
115blargg_err_t Ay_start_track( struct Ay_Emu* this, int track ); 100blargg_err_t Ay_start_track( struct Ay_Emu* this, int track );
116 101
117// Generate 'count' samples info 'buf'. Output is in stereo. Any emulation 102// Generate 'count' samples info 'buf'. Output is in stereo. Any emulation
118// errors set warning string, and major errors also end track. 103// errors set warning string, and major errors also end track.
119blargg_err_t Ay_play( struct Ay_Emu* this, long count, sample_t* buf ); 104blargg_err_t Ay_play( struct Ay_Emu* this, int count, sample_t* buf );
120 105
121 106
122// Track status/control 107// Track status/control
123 108
124// Number of milliseconds (1000 msec = 1 second) played since beginning of track 109// Number of milliseconds (1000 msec = 1 second) played since beginning of track
125long Track_tell( struct Ay_Emu* this ); 110int Track_tell( struct Ay_Emu* this );
126 111
127// Seek to new time in track. Seeking backwards or far forward can take a while. 112// Seek to new time in track. Seeking backwards or far forward can take a while.
128blargg_err_t Track_seek( struct Ay_Emu* this, long msec ); 113blargg_err_t Track_seek( struct Ay_Emu* this, int msec );
129 114
130// Skip n samples 115// Skip n samples
131blargg_err_t Track_skip( struct Ay_Emu* this, long n ); 116blargg_err_t Track_skip( struct Ay_Emu* this, int n );
132 117
133// Set start time and length of track fade out. Once fade ends track_ended() returns 118// Set start time and length of track fade out. Once fade ends track_ended() returns
134// true. Fade time can be changed while track is playing. 119// true. Fade time can be changed while track is playing.
135void Track_set_fade( struct Ay_Emu* this, long start_msec, long length_msec ); 120void Track_set_fade( struct Ay_Emu* this, int start_msec, int length_msec );
121
122// True if a track has reached its end
123static inline bool Track_ended( struct Ay_Emu* this )
124{
125 return track_ended( &this->track_filter );
126}
127
128// Disables automatic end-of-track detection and skipping of silence at beginning
129static inline void Track_ignore_silence( struct Ay_Emu* this, bool disable )
130{
131 this->track_filter.silence_ignored_ = disable;
132}
136 133
137// Get track length in milliseconds 134// Get track length in milliseconds
138long Track_get_length( struct Ay_Emu* this, int n ); 135int Track_get_length( struct Ay_Emu* this, int n );
139 136
140// Sound customization 137// Sound customization
141 138
142// Adjust song tempo, where 1.0 = normal, 0.5 = half speed, 2.0 = double speed. 139// Adjust song tempo, where 1.0 = normal, 0.5 = half speed, 2.0 = double speed.
143// Track length as returned by track_info() assumes a tempo of 1.0. 140// Track length as returned by track_info() assumes a tempo of 1.0.
144void Sound_set_tempo( struct Ay_Emu* this, int t ); 141void Sound_set_tempo( struct Ay_Emu* this, int t );
145 142
146// Mute/unmute voice i, where voice 0 is first voice 143// Mute/unmute voice i, where voice 0 is first voice
147void Sound_mute_voice( struct Ay_Emu* this, int index, bool mute ); 144void Sound_mute_voice( struct Ay_Emu* this, int index, bool mute );
148 145
149// Set muting state of all voices at once using a bit mask, where -1 mutes them all, 146// Set muting state of all voices at once using a bit mask, where -1 mutes them all,
150// 0 unmutes them all, 0x01 mutes just the first voice, etc. 147// 0 unmutes them all, 0x01 mutes just the first voice, etc.
151void Sound_mute_voices( struct Ay_Emu* this, int mask ); 148void Sound_mute_voices( struct Ay_Emu* this, int mask );
@@ -168,5 +165,5 @@ static inline void disable_beeper( struct Ay_Emu *this )
168 this->beeper_mask = 0; 165 this->beeper_mask = 0;
169 this->last_beeper = 0; 166 this->last_beeper = 0;
170} 167}
171 168
172#endif 169#endif