feat(sound): redesign with separate device profiles page (#1500)

crates/cosmic-pipewire/src/spa_utils.rs

@@ -0,0 +1,152 @@
+// Copyright 2025 System76 <info@system76.com>
+// SPDX-License-Identifier: MPL-2.0
+
+use libspa::pod::Pod;
+use std::ffi::CStr;
+
+/// Read a `Pod`'s string if it contains a string.
+pub fn string_from_pod(pod: &Pod) -> Option<String> {
+    if !pod.is_string() {
+        return None;
+    }
+
+    let mut cstr = std::ptr::null();
+
+    unsafe {
+        // SAFETY: Pod is checked to be a string beforehand
+        if libspa_sys::spa_pod_get_string(pod.as_raw_ptr(), &mut cstr) == 0 {
+            if !cstr.is_null() {
+                return Some(String::from_utf8_lossy(CStr::from_ptr(cstr).to_bytes()).into_owned());
+            }
+        }
+    }
+
+    None
+}
+
+/// SAFETY: Must be absolutely certain that the array is a compatible array.
+pub unsafe fn array_from_pod<CType: Copy>(pod: &Pod) -> Option<Vec<CType>> {
+    if !pod.is_array() {
+        return None;
+    }
+
+    let mut len = 0;
+
+    unsafe {
+        let array: *mut CType = libspa_sys::spa_pod_get_array(pod.as_raw_ptr(), &mut len).cast();
+
+        if array.is_null() {
+            return None;
+        }
+
+        Some(std::slice::from_raw_parts(array, len as usize).to_vec())
+    }
+}
+
+#[repr(u32)]
+#[derive(Copy, Clone, Debug, Default, Hash, Eq, PartialEq)]
+pub enum Channel {
+    #[default]
+    UNKNOWN = 0, // unspecified
+    NA,          // N/A, silent
+    MONO,        // mono stream
+    FL,          // front left
+    FR,          // front right
+    FC,          // front center
+    LFE,         // LFE
+    SL,          // side left
+    SR,          // side right
+    FLC,         // front left center
+    FRC,         // front right center
+    RC,          // rear center
+    RL,          // rear left
+    RR,          // rear right
+    TC,          // top center
+    TFL,         // top front left
+    TFC,         // top front center
+    TFR,         // top front right
+    TRL,         // top rear left
+    TRC,         // top rear center
+    TRR,         // top rear right
+    RLC,         // rear left center
+    RRC,         // rear right center
+    FLW,         // front left wide
+    FRW,         // front right wide
+    LFE2,        // LFE 2
+    FLH,         // front left high
+    FCH,         // front center high
+    FRH,         // front right high
+    TFLC,        // top front left center
+    TFRC,        // top front right center
+    TSL,         // top side left
+    TSR,         // top side right
+    LLFE,        // left LFE
+    RLFE,        // right LFE
+    BC,          // bottom center
+    BLC,         // bottom left center
+    BRC = 37,    // bottom right center
+    AUX0 = 4096, // aux channels
+    AUX1,
+    AUX2,
+    AUX3,
+    AUX4,
+    AUX5,
+    AUX6,
+    AUX7,
+    AUX8,
+    AUX9,
+    AUX10,
+    AUX11,
+    AUX12,
+    AUX13,
+    AUX14,
+    AUX15,
+    AUX16,
+    AUX17,
+    AUX18,
+    AUX19,
+    AUX20,
+    AUX21,
+    AUX22,
+    AUX23,
+    AUX24,
+    AUX25,
+    AUX26,
+    AUX27,
+    AUX28,
+    AUX29,
+    AUX30,
+    AUX31,
+    AUX32,
+    AUX33,
+    AUX34,
+    AUX35,
+    AUX36,
+    AUX37,
+    AUX38,
+    AUX39,
+    AUX40,
+    AUX41,
+    AUX42,
+    AUX43,
+    AUX44,
+    AUX45,
+    AUX46,
+    AUX47,
+    AUX48,
+    AUX49,
+    AUX50,
+    AUX51,
+    AUX52,
+    AUX53,
+    AUX54,
+    AUX55,
+    AUX56,
+    AUX57,
+    AUX58,
+    AUX59,
+    AUX60,
+    AUX61,
+    AUX62,
+    AUX63 = 4159,
+}