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use super::time_code::*;
use super::util::*;
/// A fairly limited set of messages, generally for device synchronization.
/// Used in [`MidiMsg`](crate::MidiMsg).
#[derive(Debug, Clone, Copy, PartialEq)]
pub enum SystemCommonMsg {
/// The first of 8 "quarter frame" messages, which are meant to be sent 4 per "frame".
/// These messages function similarly to [`SystemRealTimeMsg::TimingClock`](crate::SystemRealTimeMsg::TimingClock)
/// but additionally indicate the specific point in the playback that they refer to, as well
/// as the frame rate. This means that a full `TimeCode` is send over the course of two frames.
///
/// They are sent in reverse order if time is playing in reverse.
TimeCodeQuarterFrame1(TimeCode),
TimeCodeQuarterFrame2(TimeCode),
TimeCodeQuarterFrame3(TimeCode),
TimeCodeQuarterFrame4(TimeCode),
TimeCodeQuarterFrame5(TimeCode),
TimeCodeQuarterFrame6(TimeCode),
TimeCodeQuarterFrame7(TimeCode),
TimeCodeQuarterFrame8(TimeCode),
/// Indicate the song position, in MIDI beats, where 1 MIDI beat = 6 MIDI clocks. 0-16383
SongPosition(u16),
/// Select a song numbered 0-127.
SongSelect(u8),
/// Request that the oscillators of an analog synth be tuned.
TuneRequest,
}
impl SystemCommonMsg {
pub(crate) fn extend_midi(&self, v: &mut Vec<u8>) {
match self {
SystemCommonMsg::TimeCodeQuarterFrame1(qf) => {
v.push(0xF1);
v.push(qf.to_nibbles()[0]);
}
SystemCommonMsg::TimeCodeQuarterFrame2(qf) => {
v.push(0xF1);
v.push(qf.to_nibbles()[1]);
}
SystemCommonMsg::TimeCodeQuarterFrame3(qf) => {
v.push(0xF1);
v.push(qf.to_nibbles()[2]);
}
SystemCommonMsg::TimeCodeQuarterFrame4(qf) => {
v.push(0xF1);
v.push(qf.to_nibbles()[3]);
}
SystemCommonMsg::TimeCodeQuarterFrame5(qf) => {
v.push(0xF1);
v.push(qf.to_nibbles()[4]);
}
SystemCommonMsg::TimeCodeQuarterFrame6(qf) => {
v.push(0xF1);
v.push(qf.to_nibbles()[5]);
}
SystemCommonMsg::TimeCodeQuarterFrame7(qf) => {
v.push(0xF1);
v.push(qf.to_nibbles()[6]);
}
SystemCommonMsg::TimeCodeQuarterFrame8(qf) => {
v.push(0xF1);
v.push(qf.to_nibbles()[7]);
}
SystemCommonMsg::SongPosition(pos) => {
v.push(0xF2);
push_u14(*pos, v);
}
SystemCommonMsg::SongSelect(song) => {
v.push(0xF3);
v.push(to_u7(*song));
}
SystemCommonMsg::TuneRequest => v.push(0xF6),
}
}
pub(crate) fn from_midi(_m: &[u8]) -> Result<(Self, usize), &str> {
Err("TODO: not implemented")
}
}
#[cfg(test)]
mod tests {
use super::super::*;
#[test]
fn serialize_system_common_msg() {
assert_eq!(
MidiMsg::SystemCommon {
msg: SystemCommonMsg::TuneRequest
}
.to_midi(),
vec![0xF6]
);
assert_eq!(
MidiMsg::SystemCommon {
msg: SystemCommonMsg::SongSelect(69)
}
.to_midi(),
vec![0xF3, 69]
);
assert_eq!(
MidiMsg::SystemCommon {
msg: SystemCommonMsg::SongPosition(1000)
}
.to_midi(),
vec![0xF2, 0x68, 0x07]
);
let frame = TimeCode {
frames: 40, // Should be limited to 29: 0b00011101
seconds: 58, // 0b00111010
minutes: 20, // 0b00010100
hours: 25, // Should be limited to 23: 0b00010111
code_type: TimeCodeType::DF30, // 0b01000000
};
assert_eq!(
MidiMsg::SystemCommon {
msg: SystemCommonMsg::TimeCodeQuarterFrame1(frame)
}
.to_midi(),
vec![0xF1, 0b1101]
);
assert_eq!(
MidiMsg::SystemCommon {
msg: SystemCommonMsg::TimeCodeQuarterFrame2(frame)
}
.to_midi(),
vec![0xF1, 0b00010000 + 0b0001]
);
assert_eq!(
MidiMsg::SystemCommon {
msg: SystemCommonMsg::TimeCodeQuarterFrame3(frame)
}
.to_midi(),
vec![0xF1, 0b00100000 + 0b1010]
);
assert_eq!(
MidiMsg::SystemCommon {
msg: SystemCommonMsg::TimeCodeQuarterFrame4(frame)
}
.to_midi(),
vec![0xF1, 0b00110000 + 0b0011]
);
assert_eq!(
MidiMsg::SystemCommon {
msg: SystemCommonMsg::TimeCodeQuarterFrame5(frame)
}
.to_midi(),
vec![0xF1, 0b01000000 + 0b0100]
);
assert_eq!(
MidiMsg::SystemCommon {
msg: SystemCommonMsg::TimeCodeQuarterFrame6(frame)
}
.to_midi(),
vec![0xF1, 0b01010000 + 0b0001]
);
assert_eq!(
MidiMsg::SystemCommon {
msg: SystemCommonMsg::TimeCodeQuarterFrame7(frame)
}
.to_midi(),
vec![0xF1, 0b01100000 + 0b0111]
);
assert_eq!(
MidiMsg::SystemCommon {
msg: SystemCommonMsg::TimeCodeQuarterFrame8(frame)
}
.to_midi(),
vec![0xF1, 0b01110000 + 0b0101]
);
}
}