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//
// Globals.
//
static int step_counter = 0;
int trig_selection_loc = 0;
int param_selection_loc = 0;
int channel_selection_loc = 0;
int pattern_selection_loc = 0;
int right_col_selection_loc = 0;
int play_status = 0;
int current_pattern = 0;
int next_pattern = 0;
int current_bank = 0;
u32 last_trig_loc = 0;
u32 last_channel_loc = 0;
u32 last_pattern_loc = 0;
u32 last_right_col_loc = 0;
u32 last_step_counter = 0;
bool clear_screen = true;
//
// Color indexes.
//
#define COL_BG 0
#define COL_FG 1
#define COL_ACC_0 2
#define COL_ACC_1 3
#define COL_ACC_2 4
#define COL_OFF 5
#define CHAN_W 19
#define CHAN_H 8
#define CHAN_START_X 30
#define CHAN_START_Y 95
#define CHAN_OFFSET_Y 15
#define TRIG_W 15
#define TRIG_H 22
#define TRIG_START_X 59
#define TRIG_START_Y 95
#define TRIG_OFFSET_X (TRIG_W + 3)
#define TRIG_OFFSET_Y (TRIG_H + 8)
#define PIANO_W 170
#define PIANO_H 20
#define PIANO_START_X 30
#define PIANO_START_Y 67
#define PIANO_NOTE_W 2
#define PARAMS_W 170
#define PARAMS_H 64
#define PARAMS_START_X 30
#define PARAMS_START_Y 1
#define R_SIDEBAR_X ((TRIG_START_X) + (TRIG_OFFSET_X) * 8 + 4)
#define L_SIDEBAR_X ((CHAN_START_X) - 26)
#define PAT_START_X (L_SIDEBAR_X + 4)
#define PAT_START_Y 18
#define PAT_W 14
#define PAT_H 10
#define PAT_OFFSET_Y 17
#define R_COL_W 24
#define BPM_START_X (R_SIDEBAR_X)
#define BPM_START_Y (TRIG_START_Y + TRIG_H + 8)
#define BPM_H 22
#define PLAY_START_X (R_SIDEBAR_X)
#define PLAY_START_Y (TRIG_START_Y + 12)
#define STOP_START_X (R_SIDEBAR_X + 14)
#define STOP_START_Y (TRIG_START_Y + 12)
#define PLAY_STOP_W (10)
#define PLAY_STOP_H (10)
#define BANK_START_X (R_SIDEBAR_X + 5)
#define BANK_START_Y (PAT_START_Y)
#define SEQ_N_CHANNELS 4
enum RIGHT_COL_LOC {
R_COL_BPM = 0,
R_COL_STOP = 1,
R_COL_PLAY = 2,
R_COL_BANK_D = 3,
R_COL_BANK_C = 4,
R_COL_BANK_B = 5,
R_COL_BANK_A = 6,
};
// Input handling works using a FSM. The input handler is switched to whichever
// function controls each section. For example, channel selection or trigger
// selection.
typedef void (*InputHandler)(void);
InputHandler input_handler;
void handle_trigger_selection(void);
void handle_channel_selection(void);
void handle_pattern_selection(void);
void handle_param_selection_sq1(void);
void handle_param_selection_sq2(void);
void handle_param_selection_wave(void);
void handle_param_selection_noise(void);
void handle_right_col_selection(void);
void handle_param_selection_ch1(void);
void handle_param_selection_ch2(void);
void handle_param_selection_ch3(void);
void handle_param_selection_ch4(void);
typedef enum Scene {
SCENE_SEQUENCER = 0,
SCENE_SETTINGS,
} Scene;
static Scene scene = SCENE_SEQUENCER;
static Scene next_scene = SCENE_SEQUENCER;
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