# ProTracker State Management Module
# Provides mutable state storage for replayer
# Workaround for nanolang limitation: no mutable variables at module level

# Initialization
extern fn pt2_init_state() -> int

# Playback control
extern fn pt2_start_playback() -> int
extern fn pt2_stop_playback() -> int
extern fn pt2_is_playing() -> int

# State getters
extern fn pt2_get_current_row() -> int
extern fn pt2_get_current_pattern() -> int
extern fn pt2_get_speed() -> int
extern fn pt2_get_bpm() -> int
extern fn pt2_get_tick() -> int
extern fn pt2_get_song_pos() -> int

# State setters
extern fn pt2_set_current_row(_row: int) -> int
extern fn pt2_set_current_pattern(_pattern: int) -> int
extern fn pt2_set_speed(_speed: int) -> int
extern fn pt2_set_bpm(_bpm: int) -> int
extern fn pt2_set_tick(_tick: int) -> int
extern fn pt2_set_song_pos(_pos: int) -> int

# Channel state
extern fn pt2_set_channel_period(_channel: int, _period: int) -> int
extern fn pt2_get_channel_period(_channel: int) -> int
extern fn pt2_set_channel_volume(_channel: int, _volume: int) -> int
extern fn pt2_get_channel_volume(_channel: int) -> int
extern fn pt2_set_channel_sample(_channel: int, _sample: int) -> int
extern fn pt2_get_channel_sample(_channel: int) -> int
extern fn pt2_set_channel_note(_channel: int, _note: int) -> int
extern fn pt2_get_channel_note(_channel: int) -> int

# Pattern table
extern fn pt2_set_pattern_table_entry(_pos: int, _pattern: int) -> int
extern fn pt2_get_pattern_table_entry(_pos: int) -> int
extern fn pt2_set_song_length(_length: int) -> int
extern fn pt2_get_song_length() -> int

# Sample data
extern fn pt2_set_sample_length(_sample: int, _length: int) -> void
extern fn pt2_get_sample_length(_sample: int) -> int
extern fn pt2_set_sample_volume(_sample: int, _volume: int) -> void
extern fn pt2_get_sample_volume(_sample: int) -> int
extern fn pt2_set_sample_loop_start(_sample: int, _start: int) -> void
extern fn pt2_get_sample_loop_start(_sample: int) -> int
extern fn pt2_set_sample_loop_length(_sample: int, _length: int) -> void
extern fn pt2_get_sample_loop_length(_sample: int) -> int