playmidi.h

MIDI解码程序(用VC编写)

  /* For portamento */
  uint8 portamento_time_msb, portamento_time_lsb;
  int porta_control_ratio, porta_dpb;
  int32 last_note_fine;

  /* For Drum part */
  struct DrumParts *drums[128];

  /* For NRPN Vibrato */
  int32 vibrato_depth, vibrato_delay;
  float vibrato_ratio;

  /* For RPN */
  uint8 rpnmap[RPN_MAX_DATA_ADDR]; /* pseudo RPN address map */
  uint8 rpnmap_lsb[RPN_MAX_DATA_ADDR];
  uint8 lastlrpn, lastmrpn;
  int8  nrpn; /* 0:RPN, 1:NRPN, -1:Undefined */
  int rpn_7f7f_flag;		/* Boolean flag used for RPN 7F/7F */

  /* For channel envelope */
  int32 envelope_rate[6]; /* for Envelope Generator in mix.c
			   * 0: value for attack rate
			   * 2: value for decay rate
			   * 3: value for release rate
			   */

  int mapID;			/* Program map ID */
  AlternateAssign *altassign;	/* Alternate assign patch table */
  int32 lasttime;     /* Last sample time of computed voice on this channel */

  /* flag for random pan */
  int pan_random;

  /* for Voice LPF / Resonance */
  int8 param_resonance, param_cutoff_freq;	/* -64 ~ 63 */
  float cutoff_freq_coef, resonance_dB;

  int8 velocity_sense_depth, velocity_sense_offset;
  
  int8 scale_tuning[12], prev_scale_tuning;
  int8 temper_type;

  int8 soft_pedal;
  int8 sostenuto;
  int8 damper_mode;

  int8 tone_map0_number;
  FLOAT_T pitch_offset_fine;	/* in Hz */
  int8 assign_mode;

  int8 legato;	/* legato footswitch */
  int8 legato_flag;	/* note-on flag for legato */

  midi_controller mod, bend, caf, paf, cc1, cc2;

  ChannelBitMask channel_layer;
  int port_select;

  struct part_eq_xg eq_xg;

  int8 dry_level;
  int8 note_limit_high, note_limit_low;	/* Note Limit (Keyboard Range) */
  int8 vel_limit_high, vel_limit_low;	/* Velocity Limit */
  int32 rx;	/* Rx. ~ (Rcv ~) */

  int drum_effect_num;
  int8 drum_effect_flag;
  struct DrumPartEffect *drum_effect;

  int8 sysex_gs_msb_addr, sysex_gs_msb_val,
		sysex_xg_msb_addr, sysex_xg_msb_val, sysex_msb_addr, sysex_msb_val;
} Channel;

/* Causes the instrument's default panning to be used. */
#define NO_PANNING -1

typedef struct {
	int16 freq, last_freq, orig_freq;
	double reso_dB, last_reso_dB, orig_reso_dB, reso_lin; 
	int8 type;	/* filter type. 0: Off, 1: 12dB/oct, 2: 24dB/oct */ 
	int32 f, q, p;	/* coefficients in fixed-point */
	int32 b0, b1, b2, b3, b4;
	float gain;
	int8 start_flag;
} FilterCoefficients;

#define ENABLE_PAN_DELAY
#ifdef ENABLE_PAN_DELAY
#define PAN_DELAY_BUF_MAX 48	/* 0.5ms in 96kHz */
#endif	/* ENABLE_PAN_DELAY */

typedef struct {
  uint8
    status, channel, note, velocity;
  int vid, temper_instant;
  Sample *sample;
#if SAMPLE_LENGTH_BITS == 32 && TIMIDITY_HAVE_INT64
  int64 sample_offset;	/* sample_offset must be signed */
#else
  splen_t sample_offset;
#endif
  int32
    orig_frequency, frequency, sample_increment,
    envelope_volume, envelope_target, envelope_increment,
    tremolo_sweep, tremolo_sweep_position,
    tremolo_phase, tremolo_phase_increment,
    vibrato_sweep, vibrato_sweep_position;

  final_volume_t left_mix, right_mix;
#ifdef SMOOTH_MIXING
  int32 old_left_mix, old_right_mix,
     left_mix_offset, right_mix_offset,
     left_mix_inc, right_mix_inc;
#endif

  FLOAT_T
    left_amp, right_amp, tremolo_volume;
  int32
    vibrato_sample_increment[VIBRATO_SAMPLE_INCREMENTS], vibrato_delay;
  int
	vibrato_phase, orig_vibrato_control_ratio, vibrato_control_ratio,
    vibrato_depth, vibrato_control_counter,
    envelope_stage, control_counter, panning, panned;
  int16 tremolo_depth;

  /* for portamento */
  int porta_control_ratio, porta_control_counter, porta_dpb;
  int32 porta_pb;

  int delay; /* Note ON delay samples */
  int32 timeout;
  struct cache_hash *cache;

  uint8 chorus_link;	/* Chorus link */
  int8 proximate_flag;

  FilterCoefficients fc;

  FLOAT_T envelope_scale, last_envelope_volume;
  int32 inv_envelope_scale;

  int modenv_stage;
  int32
    modenv_volume, modenv_target, modenv_increment;
  FLOAT_T last_modenv_volume;
  int32 tremolo_delay, modenv_delay;

  int32 delay_counter;

#ifdef ENABLE_PAN_DELAY
  int32 *pan_delay_buf, pan_delay_rpt, pan_delay_wpt, pan_delay_spt;
#endif	/* ENABLE_PAN_DELAY */
} Voice;

/* Voice status options: */
#define VOICE_FREE	(1<<0)
#define VOICE_ON	(1<<1)
#define VOICE_SUSTAINED	(1<<2)
#define VOICE_OFF	(1<<3)
#define VOICE_DIE	(1<<4)

/* Voice panned options: */
#define PANNED_MYSTERY 0
#define PANNED_LEFT 1
#define PANNED_RIGHT 2
#define PANNED_CENTER 3
/* Anything but PANNED_MYSTERY only uses the left volume */

#define ISDRUMCHANNEL(c)  IS_SET_CHANNELMASK(drumchannels, c)

extern Channel channel[];
extern Voice *voice;

/* --module */
extern int opt_default_module;

enum {
	MODULE_TIMIDITY_DEFAULT = 0x0,
	/* GS modules */
	MODULE_SC55 = 0x1,
	MODULE_SC88 = 0x2,
	MODULE_SC88PRO = 0x3,
	MODULE_SC8850 = 0x4,
	/* XG modules */
	MODULE_MU50 = 0x10,
	MODULE_MU80 = 0x11,
	MODULE_MU90 = 0x12,
	MODULE_MU100 = 0x13,
	/* GM modules */
	MODULE_SBLIVE = 0x20,
	MODULE_SBAUDIGY = 0x21,
	/* Special modules */
	MODULE_TIMIDITY_SPECIAL1 = 0x70,
	MODULE_TIMIDITY_DEBUG = 0x7f,
};

static inline int get_module() {return opt_default_module;}

static inline int is_gs_module()
{
	int module = get_module();
    return (module >= MODULE_SC55 && module <= MODULE_MU100);
}

static inline int is_xg_module()
{
	int module = get_module();
    return (module >= MODULE_MU50 && module <= MODULE_MU100);
}

extern int32 control_ratio, amp_with_poly, amplification;

extern ChannelBitMask default_drumchannel_mask;
extern ChannelBitMask drumchannel_mask;
extern ChannelBitMask default_drumchannels;
extern ChannelBitMask drumchannels;

extern int adjust_panning_immediately;
extern int max_voices;
extern int voices, upper_voices;
extern int note_key_offset;
extern FLOAT_T midi_time_ratio;
extern int opt_modulation_wheel;
extern int opt_portamento;
extern int opt_nrpn_vibrato;
extern int opt_reverb_control;
extern int opt_chorus_control;
extern int opt_surround_chorus;
extern int opt_channel_pressure;
extern int opt_lpf_def;
extern int opt_overlap_voice_allow;
extern int opt_temper_control;
extern int opt_tva_attack;
extern int opt_tva_decay;
extern int opt_tva_release;
extern int opt_delay_control;
extern int opt_eq_control;
extern int opt_insertion_effect;
extern int opt_drum_effect;
extern int opt_env_attack;
extern int opt_modulation_envelope;
extern int noise_sharp_type;
extern int32 current_play_tempo;
extern int opt_realtime_playing;
extern int reduce_voice_threshold; /* msec */
extern int check_eot_flag;
extern int special_tonebank;
extern int default_tonebank;
extern int playmidi_seek_flag;
extern int effect_lr_mode;
extern int effect_lr_delay_msec;
extern int auto_reduce_polyphony;
extern int play_pause_flag;
extern int reduce_quality_flag;
extern int no_4point_interpolation;
extern ChannelBitMask channel_mute;
extern int temper_type_mute;
extern int8 current_keysig;
extern int8 current_temper_keysig;
extern int temper_adj;
extern int8 opt_init_keysig;
extern int8 opt_force_keysig;
extern int key_adjust;
extern FLOAT_T tempo_adjust;
extern int opt_pure_intonation;
extern int current_freq_table;
extern int32 opt_drum_power;
extern int opt_amp_compensation;
extern int opt_realtime_priority;	/* interface/alsaseq_c.c */
extern int opt_sequencer_ports;		/* interface/alsaseq_c.c */
extern int opt_user_volume_curve;
extern int opt_pan_delay;

extern int play_midi_file(char *fn);
extern void dumb_pass_playing_list(int number_of_files, char *list_of_files[]);
extern void default_ctl_lyric(int lyricid);
extern int check_apply_control(void);
extern void recompute_freq(int v);
extern int midi_drumpart_change(int ch, int isdrum);
extern void ctl_note_event(int noteID);
extern void ctl_mode_event(int type, int trace, long arg1, long arg2);
extern char *channel_instrum_name(int ch);
extern int get_reverb_level(int ch);
extern int get_chorus_level(int ch);
extern void playmidi_output_changed(int play_state);
extern Instrument *play_midi_load_instrument(int dr, int bk, int prog);
extern void midi_program_change(int ch, int prog);
extern void free_voice(int v);
extern void play_midi_setup_drums(int ch,int note);

/* For stream player */
extern void playmidi_stream_init(void);
extern void playmidi_tmr_reset(void);
extern int play_event(MidiEvent *ev);

extern void recompute_voice_filter(int);
extern int32 get_note_freq(Sample *, int);

extern void free_drum_effect(int);

#endif /* ___PLAYMIDI_H_ */