pacmog

pacmog is a decoding library for the PCM file.
Designed for use in playing the PCM file embedded in microcontroller firmware.
Rust has an include_bytes! macro to embed the byte sequence in the program. Using it, PCM files can be embedded in firmware and used for playback.

Format	Status
WAV 16bit	✅
WAV 24bit	✅
WAV 32bit	✅
WAV 32bit float	✅
WAV 64bit float	✅
IMA ADPCM	✅
AIFF 16bit	✅
AIFF 24bit	✅
AIFF 32bit	✅
AIFF 32bit float	✅
AIFF 64bit float	✅

Example

cargo run --example beep

Low-level: Read the sample at an arbitrary position

use pacmog::PcmReader;

let wav = include_bytes!("../tests/resources/Sine440Hz_1ch_48000Hz_16.wav");
let mut input = &wav[..];
let reader = PcmReader::new(&mut input)?;
let specs = reader.get_pcm_specs();
let num_samples = specs.num_samples;
let num_channels = specs.num_channels;
println!("PCM info: {:?}", specs);

for sample in 0..num_samples {
    for channel in 0..num_channels {
        let sample_value: f32 = reader.read_sample(channel, sample)?;
        println!("{}", sample_value);
    }
}

High-level: PcmPlayer

use pacmog::{PcmPlayer, PcmReader};

let wav = include_bytes!("../tests/resources/Sine440Hz_1ch_48000Hz_16.wav");
let mut input = &wav[..];
let reader = PcmReader::new(&mut input)?;
let mut player = PcmPlayer::new(reader);
let specs = player.reader.get_pcm_specs();
let num_samples = specs.num_samples;
player.set_loop_playing(true);
let mut buffer: [f32; 2] = [0.0f32; 2];
let buf = buffer.as_mut_slice();

for sample in 0..num_samples {
   player.get_next_frame(buf)?;
}

no_std

pacmog works with no_std by default.
No setup is needed.