Sound data structure for SNDDRV. More...

Collaboration diagram for Sound data structure:

Data Structures
struct	snd_Instrument
	Instrument (timbre) table. More...

struct	snd_p_table
	Pitch bend table. More...

struct	snd_SoundAssets
	Container of list of musics, instruments, arpeggio tables, and period tables. More...

struct	snd_Music
	Container of a music data. More...

struct	snd_Track
	A fragment of single channel music score. More...

struct	snd_SpeedTrack
	A special track to control speed of tracks. More...

struct	snd_EventTrack
	A special track to control event trigger of tracks. More...

struct	snd_Pattern
	A track pattern, that corresponds to a sub-score of a music. More...

struct	snd_Pattern.specialChannels

struct	snd_Pattern.channels

Macros
#define	vec(T)
	Define a type generic vector (as named struct).

#define	vec_fields(T)
	Define fields (member variables) of a type generic vector.

Typedefs
typedef struct snd_Instrument	snd_Instrument
	Instrument (timbre) table.

typedef struct snd_p_table	snd_PitchBend
	Type alias for arpeggio/pitch-bend table.

typedef struct snd_p_table	snd_PeriodBend
	Type alias for wave-length/period modification table.

typedef struct snd_SoundAssets	snd_SoundAssets
	Container of musics, instruments, pitch-bend tables, and period-bend tables.

typedef struct snd_Music	snd_Music
	Container of a music data.

typedef struct snd_Track	snd_Track
	A fragment of single channel music score.

typedef struct snd_SpeedTrack	snd_SpeedTrack
	A special track to control speed of tracks.

typedef struct snd_EventTrack	snd_EventTrack
	A special track to control event trigger of tracks.

typedef struct snd_Pattern	snd_Pattern
	A track pattern, that corresponds to a sub-score of a music.

Detailed Description

Sound data structure for SNDDRV.

Data Structure Documentation

◆ snd_Instrument

struct snd_Instrument

Instrument (timbre) table.

An instrument table defines a time series data of an instrument's sound.

An instrument table contains 3 part of data streams:

ad_part: Attack to Decay phase.
That starts on NoteOn message.
s_part : Sustain phase. (optional)
That starts after ad_part and loopbacks until on NoteOff message.
r_part : Release phase. (optional)
That starts on NoteOff message.

Definition at line 64 of file snd_i_table.h.

Data Fields
const uint8_t	wait	Wait counts (ticks per data chunk). This determines the speed to process the instrument data stream: if `wait = 0`, data is processed every ticks. if `wait = 1`, data is processed every 2 ticks. if `wait = n`, data is processed every n+1 ticks.
const uint8_t *	ad_part	Pointer to Atack..Decay part of data stream.
const uint8_t *	s_part	Pointer to Sustain part of data stream. (loop part)
const uint8_t *	r_part	Pointer to Release part of data stream.

◆ snd_p_table

struct snd_p_table

Pitch bend table.

A pitch bend table defines a time series data of a pitch envelope such as pitch slide (pitch bend), vibrato, arpeggio.

An pitch bend table contains 3 part of data streams:

ad_part: Attack to Decay phase.
That starts on NoteOn message.
s_part : Sustain phase. (optional)
That starts after ad_part and loopbacks until on NoteOff message.
r_part : Release phase. (optional)
That starts on NoteOff message.

Definition at line 56 of file snd_p_table.h.

Data Fields
const uint8_t	wait	Wait counts (ticks per data chunk). This determines the speed to process the pitch bend data stream: if `wait = 0`, data is processed every ticks. if `wait = 1`, data is processed every 2 ticks. if `wait = n`, data is processed every n+1 ticks.
const int16_t *	ad_part	Pointer to Atack..Decay part of data stream.
const int16_t *	s_part	Pointer to Sustain part of data stream. (loop part)
const int16_t *	r_part	Pointer to Release part of data stream.

◆ snd_SoundAssets

struct snd_SoundAssets

Container of list of musics, instruments, arpeggio tables, and period tables.

A snd_SoundAssets object contains:

one or more instruments,
zero or more pitch-bend tables,
zero or more period-bend tables, and
one or more musics that shares and refers the above.

Definition at line 117 of file snd_sound.h.

Collaboration diagram for snd_SoundAssets:

Data Fields
struct vec_snd_PitchBend	pitchBendTables
struct vec_snd_PeriodBend	periodBendTables
struct vec_snd_Instrument	instruments
struct vec_snd_Music	musics

◆ snd_Music

struct snd_Music

Container of a music data.

A snd_Music object represents one music.

A snd_Music object contains:

all tracks refered in the music, and
all special tracks refered in the music.
a series of patterns that defines which track is played on which channel.

Ex. Defining a music my_music as of snd_Music type.

static const snd_Music my_music = {
  .replayRate = 60,    // [Hz]
  .speedTracks = {
    .length = ...,     // number of speed tracks
    .data = ...,       // pointer to an array of `snd_SpeedTrack`s
  },
  .eventTracks = {
    .length = ...,     // number of event tracks
    .data = ...,       // pointer to an array of `snd_EventTrack`s
  },
  .tracks = {
    .length = ...,     // number of tracks
    .data = ...,       // pointer to an array of `snd_Track`s
  },
  .patterns = {
    .length = ...,     // number of track patterns.
    .data = ...,       // pointer to an array of `snd_Pattern`s.
  },
  .initialSpeed = 5,
  .isLoop = false,
  .loopToIndex = 0,
};

Definition at line 161 of file snd_sound.h.

Collaboration diagram for snd_Music:

Data Fields
const uint8_t	format_version	Version number of this data format to be used for future compatibility. Note Currently not used, the `format_version` must be `0`.
const uint8_t	replayRate	Default player frequency that author expecting, in [Hz].
struct vec_snd_SpeedTrack	speedTracks
struct vec_snd_EventTrack	eventTracks
struct vec_snd_Track	tracks
struct vec_snd_Pattern	patterns
const uint8_t	initialSpeed	default wait count per line [tick].
const uint8_t	isLoop	`true` if loopback to the `loopToIndex` at the end of music.
const uint8_t	loopToIndex	pattern index of the beggining of loop.

◆ snd_Pattern

struct snd_Pattern

A track pattern, that corresponds to a sub-score of a music.

A snd_Pattern defines which track is played on which channel.
A vector / series of snd_Patterns corresponds to a full-score of a music.

Definition at line 217 of file snd_sound.h.

Data Fields
uint8_t	height	Number of effective lines of track(s).
struct snd_Pattern.specialChannels	specialChannels
struct snd_Pattern.channels	channels[3]

◆ snd_Pattern.specialChannels

struct snd_Pattern.specialChannels

Definition at line 219 of file snd_sound.h.

Data Fields
uint8_t	speedTrack	Index to the speed track.
uint8_t	eventTrack	Index to the event track.

◆ snd_Pattern.channels

struct snd_Pattern.channels

Definition at line 223 of file snd_sound.h.

Data Fields
uint8_t	track	Index to the track.
int16_t	detune	Pitch shift [1/256 semi-note].

Macro Definition Documentation

◆ vec

#define vec ( T )

Value:

  struct vec_ ## T {                                \
    vec_fields(T);                                  \
  }

Define a type generic vector (as named struct).

Parameters

T typename

Note: THIS MACRO IS INTERNAL USE ONLY and it will be undefined at the last of snd_sound.h.

Definition at line 89 of file snd_sound.h.

◆ vec_fields

#define vec_fields ( T )

Value:

                         \
  const size_t length;                              \

           \  const T * data

Define fields (member variables) of a type generic vector.

Parameters

T typename

Note: THIS MACRO IS INTERNAL USE ONLY and it will be undefined at the last of snd_sound.h.

Definition at line 102 of file snd_sound.h.

Typedef Documentation

◆ snd_Instrument

typedef struct snd_Instrument snd_Instrument

Instrument (timbre) table.

An instrument table defines a time series data of an instrument's sound.

An instrument table contains 3 part of data streams:

ad_part: Attack to Decay phase.
That starts on NoteOn message.
s_part : Sustain phase. (optional)
That starts after ad_part and loopbacks until on NoteOff message.
r_part : Release phase. (optional)
That starts on NoteOff message.

Definition at line 46 of file snd_i_table.h.

◆ snd_PitchBend

typedef struct snd_p_table snd_PitchBend

Type alias for arpeggio/pitch-bend table.

Definition at line 33 of file snd_p_table.h.

◆ snd_PeriodBend

typedef struct snd_p_table snd_PeriodBend

Type alias for wave-length/period modification table.

Definition at line 37 of file snd_p_table.h.

◆ snd_SoundAssets

typedef struct snd_SoundAssets snd_SoundAssets

Container of musics, instruments, pitch-bend tables, and period-bend tables.

A snd_SoundAssets object contains:

one or more instruments,
zero or more pitch-bend tables,
zero or more period-bend tables, and
one or more musics that shares and refers the above.

Definition at line 43 of file snd_sound.h.

◆ snd_Music

typedef struct snd_Music snd_Music

Container of a music data.

A snd_Music object represents one music.

A snd_Music object contains:

all tracks refered in the music, and
all special tracks refered in the music item.
a series of patterns that defines which track is played on which channel.

Definition at line 55 of file snd_sound.h.

◆ snd_Track

typedef struct snd_Track snd_Track

A fragment of single channel music score.

Definition at line 60 of file snd_sound.h.

◆ snd_SpeedTrack

typedef struct snd_SpeedTrack snd_SpeedTrack

A special track to control speed of tracks.

Definition at line 65 of file snd_sound.h.

◆ snd_EventTrack

typedef struct snd_EventTrack snd_EventTrack

A special track to control event trigger of tracks.

Note: unused yet.

Definition at line 71 of file snd_sound.h.

◆ snd_Pattern

typedef struct snd_Pattern snd_Pattern

A track pattern, that corresponds to a sub-score of a music.

A snd_Pattern defines which track is played on which channel.
A vector / series of snd_Patterns corresponds to a full-score of a music.

Definition at line 79 of file snd_sound.h.

Data Structures

Macros

Typedefs

Detailed Description

Data Structure Documentation

◆ snd_Instrument

◆ snd_p_table

◆ snd_SoundAssets

◆ snd_Music

◆ snd_Pattern

◆ snd_Pattern.specialChannels

◆ snd_Pattern.channels

Macro Definition Documentation

◆ vec

◆ vec_fields

Typedef Documentation

◆ snd_Instrument

◆ snd_PitchBend

◆ snd_PeriodBend

◆ snd_SoundAssets

◆ snd_Music

◆ snd_Track

◆ snd_SpeedTrack

◆ snd_EventTrack

◆ snd_Pattern