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use std::convert::TryFrom;
use std::fmt;
#[derive(PartialEq, Debug)]
pub enum AudioObjectTypeError {
EscapeValue,
TooLarge(u8),
}
#[derive(Eq, PartialEq, Copy, Clone)]
pub struct AudioObjectType(u8);
pub const AOT_ESCAPE_VALUE: u8 = 0b_11111;
impl From<AudioObjectType> for u8 {
fn from(v: AudioObjectType) -> Self {
v.0
}
}
impl TryFrom<u8> for AudioObjectType {
type Error = AudioObjectTypeError;
fn try_from(value: u8) -> Result<Self, Self::Error> {
match value {
AOT_ESCAPE_VALUE => Err(AudioObjectTypeError::EscapeValue),
96..=255 => Err(AudioObjectTypeError::TooLarge(value)),
_ => Ok(AudioObjectType(value)),
}
}
}
macro_rules! implement_aot {
(
$( $tag:literal $id:ident $desc:literal ),* ,
) => {
impl AudioObjectType {
$(
#[doc=$desc]
pub const $id: AudioObjectType = AudioObjectType($tag);
)*
}
impl fmt::Debug for AudioObjectType {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
match self.0 {
$(
$tag => write!(f, "{}({})", stringify!($id), $tag)
),* ,
_ => write!(f, "RESERVED({})", self.0),
}
}
}
}
}
implement_aot! {
0 NULL "Null",
1 AAC_MAIN "AAC main",
3 AAC_SSR "AAC SSR",
4 AAC_LTP "AAC LTP",
7 TWIN_VQ "TwinVQ",
8 CELP "CELP",
9 HVXC "HVXC",
5 SBR "SBR",
6 AAC_SCALABLE "AAC Scalable",
2 AAC_LC "AAC LC",
12 TTSI "TTSI",
13 MAIN_SYNTHETIC "Main synthetic",
14 WAVETABLE_SYNTHESIS "Wavetable synthesis",
15 GENERAL_MIDI "General MIDI",
16 ALGORITHMIC_SYNTHESIS_AND_AUDIO_FX "Algorithmic Synthesis and Audio FX",
17 ER_AAC_LC "ER AAC LC",
19 ER_AAC_LTP "ER AAC LTP",
20 ER_AAC_SCALABLE "ER AAC Scalable",
21 ER_TWIN_VQ "ER TwinVQ",
22 ER_BSAC "ER BSAC",
23 ER_AAC_LD "ER AAC LD",
24 ER_CELP "ER CELP",
25 ER_HVXC "ER HVXC",
26 ER_HILN "ER HILN",
27 ER_PARAMETRIC "ER Parametric",
28 SSC "SSC",
29 PS "PS",
30 MPEG_SURROUND "MPEG Surround",
32 LAYER1 "Layer-1",
34 LAYER3 "Layer-3",
35 DST "DST",
36 ALS "ALS",
37 SLS "SLS",
38 SLS_NON_CORE "SLS non-core",
39 ER_AAC_ELD "ER AAC ELD",
40 SMR_SIMPLE "SMR Simple",
41 SMR_MAIN "SMR Main",
42 USAC "Unified Speech and Audio Coding",
43 SAOC "Spatial Audio Object Coding",
44 LD_MPEG_SURROUND "Low Delay MPEG Surround",
45 SAOC_DE "Spatial Audio Object Coding Dialogue Enhancement",
46 AUDIO_SYNC "Audio synchronization tool",
}
#[cfg(test)]
mod tests {
use super::*;
use std::convert::TryFrom;
#[test]
fn escape_value() {
assert_eq!(
Err(AudioObjectTypeError::EscapeValue),
AudioObjectType::try_from(AOT_ESCAPE_VALUE)
);
}
}