sawyer/picocalc-os-rs
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allow userapps to change sample rate of audio

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sawyer bristol
2025-11-19 11:02:44 -07:00
parent cf8c59f021
commit 50341507cd
4 changed files with 62 additions and 12 deletions
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11
kernel/src/syscalls.rs
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@@ -7,8 +7,8 @@ use embedded_sdmmc::LfnBuffer;
use heapless::spsc::Queue;
use userlib_sys::{
AUDIO_BUFFER_SAMPLES, Alloc, AudioBufferReady, CLayout, CPixel, Dealloc, DrawIter, FileLen,
GenRand, GetMs, ListDir, Print, ReadFile, RngRequest, SendAudioBuffer, SleepMs, WriteFile,
keyboard::*,
GenRand, GetMs, ListDir, Print, ReadFile, ReconfigureAudioSampleRate, RngRequest,
SendAudioBuffer, SleepMs, WriteFile, keyboard::*,
};
#[cfg(feature = "psram")]
@@ -18,7 +18,7 @@ use crate::heap::HEAP;
use core::alloc::GlobalAlloc;
use crate::{
audio::{AUDIO_BUFFER, AUDIO_BUFFER_READY, AUDIO_BUFFER_WRITTEN},
audio::{AUDIO_BUFFER, AUDIO_BUFFER_READY, AUDIO_BUFFER_SAMPLE_RATE, AUDIO_BUFFER_WRITTEN},
display::FRAMEBUFFER,
framebuffer::FB_PAUSED,
storage::{Dir, File, SDCARD},
@@ -333,6 +333,11 @@ pub extern "C" fn file_len(str: *const u8, len: usize) -> usize {
len as usize
}
const _: ReconfigureAudioSampleRate = reconfigure_audio_sample_rate;
pub extern "C" fn reconfigure_audio_sample_rate(sample_rate: u32) {
AUDIO_BUFFER_SAMPLE_RATE.store(sample_rate, Ordering::Release);
}
const _: AudioBufferReady = audio_buffer_ready;
pub extern "C" fn audio_buffer_ready() -> bool {
AUDIO_BUFFER_READY.load(Ordering::Acquire)