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remove unmaintained WASM support

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Same reasoning as outlined in #1254

> nobody is interested in actively maintaining or contributing to that today.

Signed-off-by: Stephen Gutekanst <stephen@hexops.com>
This commit is contained in:
Stephen Gutekanst 2024-08-24 23:17:51 -07:00
parent 984d4de3bd
commit 51e996db72
10 changed files with 6 additions and 978 deletions
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5
.github/workflows/m1_ci.yml vendored
View file

@ -26,5 +26,6 @@ jobs:
run: zig build test
- name: build
run: zig build
- name: build (WASM)
run: zig build -Dtarget=wasm32-freestanding-none
# TODO: get WASM builds working
# - name: build (WASM)
# run: zig build -Dtarget=wasm32-freestanding-none

2
build.zig
View file

@ -372,7 +372,6 @@ fn buildExamples(
core: bool = false,
name: []const u8,
deps: []const Dependency = &.{},
wasm: bool = false,
has_assets: bool = false,
}{
// Mach core examples
@ -388,7 +387,6 @@ fn buildExamples(
.{ .name = "sprite", .deps = &.{ .zigimg, .assets } },
.{ .name = "text", .deps = &.{.assets} },
}) |example| {
if (target.result.cpu.arch == .wasm32 and !example.wasm) continue;
const exe = b.addExecutable(.{
.name = if (example.core) b.fmt("core-{s}", .{example.name}) else example.name,
.root_source_file = if (example.core)

3
src/core/Timer.zig
View file

@ -1,7 +1,6 @@
const std = @import("std");
const builtin = @import("builtin");
const WasmTimer = @import("wasm/Timer.zig");
const PlatformTimer = if (builtin.cpu.arch == .wasm32) WasmTimer else NativeTimer;
const PlatformTimer = if (builtin.cpu.arch == .wasm32) @panic("TODO: support WASM") else NativeTimer;
const Timer = @This();

25
src/core/wasm/Timer.zig
View file

@ -1,25 +0,0 @@
const std = @import("std");
const js = @import("js.zig");
pub const Timer = @This();
initial: f64 = undefined,
pub fn start() !Timer {
return Timer{ .initial = js.machPerfNow() };
}
pub fn read(timer: *Timer) u64 {
return @intFromFloat((js.machPerfNow() - timer.initial) * std.time.ns_per_ms);
}
pub fn reset(timer: *Timer) void {
timer.initial = js.machPerfNow();
}
pub fn lap(timer: *Timer) u64 {
const now = js.machPerfNow();
const initial = timer.initial;
timer.initial = now;
return @as(u64, @intFromFloat(now - initial)) * std.time.ns_per_ms;
}

42
src/core/wasm/entrypoint.zig
View file

@ -1,42 +0,0 @@
// Check that the user's app matches the required interface.
comptime {
if (!@import("builtin").is_test) @import("mach").core.AppInterface(@import("app"));
}
// Forward "app" declarations into our namespace, such that @import("root").foo works as expected.
pub usingnamespace @import("app");
const App = @import("app").App;
const std = @import("std");
const mach = @import("mach");
const core = mach.core;
const gpu = mach.gpu;
var app: App = undefined;
export fn wasmInit() void {
App.init(&app) catch |err| @panic(@errorName(err));
}
export fn wasmUpdate() bool {
if (core.update(&app) catch |err| @panic(@errorName(err))) {
return true;
}
return false;
}
export fn wasmDeinit() void {
app.deinit();
}
// Define std_options.logFn if the user did not in their "app" main.zig
pub usingnamespace if (@hasDecl(App, "std_options")) struct {} else struct {
pub const std_options = std.Options{
.logFn = core.defaultLog,
};
};
// Define panic() if the user did not in their "app" main.zig
pub usingnamespace if (@hasDecl(App, "panic")) struct {} else struct {
pub const panic = core.defaultPanic;
};

42
src/core/wasm/js.zig
View file

@ -1,42 +0,0 @@
pub const CanvasId = u32;
pub extern "mach" fn machLogWrite(str: [*]const u8, len: u32) void;
pub extern "mach" fn machLogFlush() void;
pub extern "mach" fn machPanic(str: [*]const u8, len: u32) void;
pub extern "mach" fn machCanvasInit(selector_id: *u8) CanvasId;
pub extern "mach" fn machCanvasDeinit(canvas: CanvasId) void;
pub extern "mach" fn machCanvasFramebufferWidth(canvas: CanvasId) u32;
pub extern "mach" fn machCanvasFramebufferHeight(canvas: CanvasId) u32;
pub extern "mach" fn machCanvasSetTitle(canvas: CanvasId, title: [*]const u8, len: u32) void;
pub extern "mach" fn machCanvasSetDisplayMode(canvas: CanvasId, mode: u32) void;
pub extern "mach" fn machCanvasDisplayMode(canvas: CanvasId) u32;
pub extern "mach" fn machCanvasSetBorder(canvas: CanvasId, value: bool) void;
pub extern "mach" fn machCanvasBorder(canvas: CanvasId) bool;
pub extern "mach" fn machCanvasSetHeadless(canvas: CanvasId, value: bool) void;
pub extern "mach" fn machCanvasHeadless(canvas: CanvasId) bool;
pub extern "mach" fn machCanvasSetVsync(canvas: CanvasId, mode: u32) void;
pub extern "mach" fn machCanvasVsync(canvas: CanvasId) u32;
pub extern "mach" fn machCanvasSetSize(canvas: CanvasId, width: u32, height: u32) void;
pub extern "mach" fn machCanvasWidth(canvas: CanvasId) u32;
pub extern "mach" fn machCanvasHeight(canvas: CanvasId) u32;
pub extern "mach" fn machCanvasSetSizeLimit(canvas: CanvasId, min_width: i32, min_height: i32, max_width: i32, max_height: i32) void;
pub extern "mach" fn machCanvasMinWidth(canvas: CanvasId) u32;
pub extern "mach" fn machCanvasMinHeight(canvas: CanvasId) u32;
pub extern "mach" fn machCanvasMaxWidth(canvas: CanvasId) u32;
pub extern "mach" fn machCanvasMaxHeight(canvas: CanvasId) u32;
pub extern "mach" fn machSetCursorMode(canvas: CanvasId, mode: u32) void;
pub extern "mach" fn machCursorMode(canvas: CanvasId) u32;
pub extern "mach" fn machSetCursorShape(canvas: CanvasId, shape: u32) void;
pub extern "mach" fn machCursorShape(canvas: CanvasId) u32;
pub extern "mach" fn machJoystickName(idx: u8, dest: [*:0]u8, dest_len: usize) void;
pub extern "mach" fn machJoystickButtons(idx: u8, dest: [*]u8, dest_len: usize) void;
pub extern "mach" fn machJoystickAxes(idx: u8, dest: [*]f32, dest_len: usize) void;
pub extern "mach" fn machShouldClose() bool;
pub extern "mach" fn machHasEvent() bool;
pub extern "mach" fn machEventShift() i32;
pub extern "mach" fn machEventShiftFloat() f64;
pub extern "mach" fn machChangeShift() u32;
pub extern "mach" fn machPerfNow() f64;

569
src/core/wasm/mach.js
View file

@ -1,569 +0,0 @@
const text_decoder = new TextDecoder();
const text_encoder = new TextEncoder();
const mach = {
canvases: [],
wasm: undefined,
observer: undefined,
events: [],
changes: [],
log_buf: "",
init(wasm) {
mach.wasm = wasm;
mach.observer = new MutationObserver((mutables) => {
mutables.forEach((mutable) => {
mach.canvases.forEach((canvas) => {
if (mutable.target == canvas) {
if (mutable.attributeName === "width" ||
mutable.attributeName === "height" ||
mutable.attributeName === "style") {
mutable.target.dispatchEvent(new Event("mach-canvas-resize"));
}
}
});
})
})
},
getString(str, len) {
const memory = mach.wasm.exports.memory.buffer;
return text_decoder.decode(new Uint8Array(memory, str, len));
},
setString(str, buf) {
const memory = mach.wasm.exports.memory.buffer;
const strbuf = text_encoder.encode(str);
const outbuf = new Uint8Array(memory, buf, strbuf.length);
for (let i = 0; i < strbuf.length; i += 1) {
outbuf[i] = strbuf[i];
}
},
machLogWrite(str, len) {
mach.log_buf += mach.getString(str, len);
},
machLogFlush() {
console.log(mach.log_buf);
mach.log_buf = "";
},
machPanic(str, len) {
throw Error(mach.getString(str, len));
},
machCanvasInit(id) {
let canvas = document.createElement("canvas");
canvas.id = "#mach-canvas-" + mach.canvases.length;
canvas.style.border = "1px solid";
canvas.style.position = "absolute";
canvas.style.display = "block";
canvas.tabIndex = 1;
mach.observer.observe(canvas, { attributes: true });
mach.setString(canvas.id, id);
canvas.addEventListener("contextmenu", (ev) => ev.preventDefault());
canvas.addEventListener("keydown", (ev) => {
if (ev.repeat) {
mach.events.push(...[EventCode.key_repeat, convertKeyCode(ev.code)]);
} else {
mach.events.push(...[EventCode.key_press, convertKeyCode(ev.code)]);
}
});
canvas.addEventListener("keyup", (ev) => {
mach.events.push(...[EventCode.key_release, convertKeyCode(ev.code)]);
});
canvas.addEventListener("mousemove", (ev) => {
mach.events.push(...[EventCode.mouse_motion, ev.clientX, ev.clientY]);
});
canvas.addEventListener("mousedown", (ev) => {
mach.events.push(...[EventCode.mouse_press, ev.button]);
});
canvas.addEventListener("mouseup", (ev) => {
mach.events.push(...[EventCode.mouse_release, ev.button]);
});
canvas.addEventListener("wheel", (ev) => {
mach.events.push(...[EventCode.mouse_scroll, ev.deltaX, ev.deltaY]);
});
canvas.addEventListener("gamepadconnected", (ev) => {
mach.events.push(...[
EventCode.joystick_connected, ev.gamepad.index,
ev.gamepad.buttons.length, ev.gamepad.axes.length,
]);
});
canvas.addEventListener("gamepaddisconnected", (ev) => {
mach.events.push(...[EventCode.joystick_disconnected, ev.gamepad.index]);
});
canvas.addEventListener("mach-canvas-resize", (ev) => {
const cv_index = mach.canvases.findIndex((el) => el === ev.currentTarget);
const cv = mach.canvases[cv_index];
mach.events.push(...[EventCode.framebuffer_resize, cv.width, cv.height, window.devicePixelRatio]);
});
canvas.addEventListener("focus", (ev) => {
mach.events.push(...[EventCode.focus_gained]);
});
canvas.addEventListener("blur", (ev) => {
mach.events.push(...[EventCode.focus_lost]);
});
document.body.appendChild(canvas);
return mach.canvases.push(canvas) - 1;
},
machCanvasDeinit(canvas) {
if (mach.canvases[canvas] != undefined) {
mach.canvases.splice(canvas, 1);
}
},
machCanvasFramebufferWidth(canvas) {
const cv = mach.canvases[canvas];
return cv.width;
},
machCanvasFramebufferHeight(canvas) {
const cv = mach.canvases[canvas];
return cv.height;
},
machCanvasSetTitle(canvas, title, len) {
// TODO(wasm)
},
machCanvasSetDisplayMode(canvas, mode) {
const cv = mach.canvases[canvas];
switch (mode) {
case DisplayMode.windowed:
document.exitFullscreen();
break;
case DisplayMode.fullscreen:
cv.requestFullscreen();
break;
}
},
machCanvasDisplayMode(canvas) {
if (mach.canvases[canvas].fullscreenElement == null) {
return DisplayMode.windowed;
} else {
return DisplayMode.fullscreen;
}
},
machCanvasSetBorder(canvas, value) {
// TODO(wasm)
},
machCanvasBorder(canvas) {
// TODO(wasm)
},
machCanvasSetHeadless(canvas, value) {
// TODO(wasm)
},
machCanvasHeadless(canvas) {
// TODO(wasm)
},
machCanvasSetVSync(canvas, mode) {
// TODO(wasm)
},
machCanvasVSync(canvas) {
// TODO(wasm)
},
machCanvasSetSize(canvas, width, height) {
const cv = mach.canvases[canvas];
if (width > 0 && height > 0) {
cv.style.width = width + "px";
cv.style.height = height + "px";
cv.width = Math.floor(width * window.devicePixelRatio);
cv.height = Math.floor(height * window.devicePixelRatio);
}
},
machCanvasWidth(canvas) {
const cv = mach.canvases[canvas];
return cv.width / window.devicePixelRatio;
},
machCanvasHeight(canvas) {
const cv = mach.canvases[canvas];
return cv.height / window.devicePixelRatio;
},
machCanvasSetSizeLimit(canvas, min_width, min_height, max_width, max_height) {
const cv = mach.canvases[canvas];
if (min_width == -1) {
cv.style.minWidth = "inherit"
} else {
cv.style.minWidth = min_width + "px";
}
if (min_width == -1) {
cv.style.minHeight = "inherit"
} else {
cv.style.minHeight = min_height + "px";
}
if (min_width == -1) {
cv.style.maxWidth = "inherit"
} else {
cv.style.maxWidth = max_width + "px";
}
if (min_width == -1) {
cv.style.maxHeight = "inherit"
} else {
cv.style.maxHeight = max_height + "px";
}
},
machCanvasMinWidth(canvas) {
const cv = mach.canvases[canvas];
return cv.style.minWidth;
},
machCanvasMinHeight(canvas) {
const cv = mach.canvases[canvas];
return cv.style.minHeight;
},
machCanvasMaxWidth(canvas) {
const cv = mach.canvases[canvas];
return cv.style.maxWidth;
},
machCanvasMaxHeight(canvas) {
const cv = mach.canvases[canvas];
return cv.style.maxHeight;
},
machSetCursorMode(canvas, mode) {
const cv = mach.canvases[canvas];
switch (mode) {
case CursorMode.normal:
cv.style.cursor = 'default';
break;
case CursorMode.hidden:
cv.style.cursor = 'none';
break;
case CursorMode.hidden:
cv.style.cursor = 'none';
break;
}
},
machCursorMode(canvas) {
switch (mach.canvases[canvas].style.cursor) {
case 'none': return CursorMode.hidden;
default: return CursorMode.normal;
}
},
machSetCursorShape(canvas, shape) {
const cv = mach.canvases[canvas];
switch (shape) {
case CursorShape.arrow:
cv.style.cursor = 'default';
break;
case CursorShape.ibeam:
cv.style.cursor = 'text';
break;
case CursorShape.crosshair:
cv.style.cursor = 'crosshair';
break;
case CursorShape.pointing_hand:
cv.style.cursor = 'pointer';
break;
case CursorShape.resize_ew:
cv.style.cursor = 'ew-resize';
break;
case CursorShape.resize_ns:
cv.style.cursor = 'ns-resize';
break;
case CursorShape.resize_nwse:
cv.style.cursor = 'nwse-resize';
break;
case CursorShape.resize_nesw:
cv.style.cursor = 'nesw-resize';
break;
case CursorShape.resize_all:
cv.style.cursor = 'move';
break;
case CursorShape.not_allowed:
cv.style.cursor = 'not-allowed';
break;
}
},
machCursorShape(canvas) {
switch (mach.canvases[canvas].style.cursor) {
case 'default': return CursorShape.arrow;
case 'text': return CursorShape.ibeam;
case 'crosshair': return CursorShape.crosshair;
case 'pointer': return CursorShape.pointing_hand;
case 'ew-resize': return CursorShape.resize_ew;
case 'ns-resize': return CursorShape.resize_ns;
case 'nwse-resize': return CursorShape.resize_nwse;
case 'nesw-resize': return CursorShape.resize_nesw;
case 'move': return CursorShape.resize_all;
case 'not-allowed': return CursorShape.not_allowed;
}
},
machJoystickName(idx, dest, dest_len) {
const gamepads = navigator.getGamepads();
if( idx < 0 || idx > gamepads.length )
return;
if( gamepads[idx] === null || gamepads[idx] === undefined )
return;
const name = gamepads[idx].id;
const strbuf = text_encoder.encode(name).slice(0, dest_len);
const dstbuf = new Uint8Array(mach.wasm.exports.memory.buffer, dest, dest_len+1);
dstbuf.set(strbuf);
dstbuf[dest_len] = 0;
},
machJoystickButtons(idx, dest, dest_len) {
const gamepads = navigator.getGamepads();
if( idx < 0 || idx > gamepads.length )
return;
if( gamepads[idx] === null || gamepads[idx] === undefined )
return;
const buttons = gamepads[idx].buttons.map(x => x.pressed ? 1 : 0);
const count = Math.min(dest_len, buttons.length);
const dstbuf = new Uint8Array(mach.wasm.exports.memory.buffer, dest, count);
dstbuf.set(buttons);
},
machJoystickAxes(idx, dest, dest_len) {
const gamepads = navigator.getGamepads();
if( idx < 0 || idx > gamepads.length )
return;
if( gamepads[idx] === null || gamepads[idx] === undefined )
return;
const axes = gamepads[idx].axes;
const count = Math.min(dest_len, axes.length);
const dstbuf = new Float32Array(mach.wasm.exports.memory.buffer, dest, count);
dstbuf.set(axes);
},
machHasEvent() {
return mach.events.length > 0;
},
machEventShift() {
if (mach.machHasEvent())
return mach.events.shift();
return -1;
},
machEventShiftFloat() {
return mach.machEventShift();
},
machPerfNow() {
return performance.now();
},
};
function convertKeyCode(code) {
const k = Key[code];
if (k != undefined)
return k;
return 118; // Unknown
}
const EventCode = {
key_press: 0,
key_repeat: 1,
key_release: 2,
char_input: 3,
mouse_motion: 4,
mouse_press: 5,
mouse_release: 6,
mouse_scroll: 7,
joystick_connected: 8,
joystick_disconnected: 9,
framebuffer_resize: 10,
focus_gained: 11,
focus_lost: 12,
close: 13,
};
const Key = {
KeyA: 0,
KeyB: 1,
KeyC: 2,
KeyD: 3,
KeyE: 4,
KeyF: 5,
KeyG: 6,
KeyH: 7,
KeyI: 8,
KeyJ: 9,
KeyK: 10,
KeyL: 11,
KeyM: 12,
KeyN: 13,
KeyO: 14,
KeyP: 15,
KeyQ: 16,
KeyR: 17,
KeyS: 18,
KeyT: 19,
KeyU: 20,
KeyV: 21,
KeyW: 22,
KeyX: 23,
KeyY: 24,
KeyZ: 25,
Digit0: 26,
Digit1: 27,
Digit2: 28,
Digit3: 29,
Digit4: 30,
Digit5: 31,
Digit6: 32,
Digit7: 33,
Digit8: 34,
Digit9: 35,
F1: 36,
F2: 37,
F3: 38,
F4: 39,
F5: 40,
F6: 41,
F7: 42,
F8: 43,
F9: 44,
F10: 45,
F11: 46,
F12: 47,
F13: 48,
F14: 49,
F15: 50,
F16: 51,
F17: 52,
F18: 53,
F19: 54,
F20: 55,
F21: 56,
F22: 57,
F23: 58,
F24: 59,
F25: 60,
NumpadDivide: 61,
NumpadMultiply: 62,
NumpadSubtract: 63,
NumpadAdd: 64,
Numpad0: 65,
Numpad1: 66,
Numpad2: 67,
Numpad3: 68,
Numpad4: 69,
Numpad5: 70,
Numpad6: 71,
Numpad7: 72,
Numpad8: 73,
Numpad9: 74,
NumpadDecimal: 75,
NumpadEqual: 76,
NumpadEnter: 77,
Enter: 78,
Escape: 79,
Tab: 80,
ShiftLeft: 81,
ShiftRight: 82,
ControlLeft: 83,
ControlRight: 84,
AltLeft: 85,
AltRight: 86,
OSLeft: 87,
MetaLeft: 87,
OSRight: 88,
MetaRight: 88,
ContextMenu: 89,
NumLock: 90,
CapsLock: 91,
PrintScreen: 92,
ScrollLock: 93,
Pause: 94,
Delete: 95,
Home: 96,
End: 97,
PageUp: 98,
PageDown: 99,
Insert: 100,
ArrowLeft: 101,
ArrowRight: 102,
ArrowUp: 103,
ArrowDown: 104,
Backspace: 105,
Space: 106,
Minus: 107,
Equal: 108,
BracketLeft: 109,
BracketRight: 110,
Backslash: 111,
Semicolon: 112,
Quote: 113,
Comma: 114,
Period: 115,
Slash: 116,
Backquote: 117,
};
const DisplayMode = {
windowed: 0,
fullscreen: 1,
};
const CursorMode = {
normal: 0,
hidden: 1,
disabled: 2,
};
const CursorShape = {
arrow: 0,
ibeam: 1,
crosshair: 2,
pointing_hand: 3,
resize_ew: 4,
resize_ns: 5,
resize_nwse: 6,
resize_nesw: 7,
resize_all: 8,
not_allowed: 9,
};
export { mach };

9
src/gfx/font/main.zig
View file

@ -5,14 +5,9 @@ const math = mach.math;
const vec2 = math.vec2;
const Vec2 = math.Vec2;
pub const Font = FontInterface(if (@import("builtin").cpu.arch == .wasm32) {
@panic("TODO: implement wasm/Font.zig");
} else @import("native/Font.zig"));
pub const Font = FontInterface(if (@import("builtin").cpu.arch == .wasm32) @panic("TODO: implement wasm/Font.zig") else @import("native/Font.zig"));
pub const TextRun = TextRunInterface(if (@import("builtin").cpu.arch == .wasm32)
{
@panic("TODO: implement wasm/TextRun.zig");
} else @import("native/TextRun.zig"));
pub const TextRun = TextRunInterface(if (@import("builtin").cpu.arch == .wasm32) @panic("TODO: implement wasm/TextRun.zig") else @import("native/TextRun.zig"));
fn FontInterface(comptime T: type) type {
assertDecl(T, "initBytes", fn (font_bytes: []const u8) anyerror!T);

12
src/sysaudio/backends.zig
View file

@ -26,10 +26,6 @@ pub const Context = switch (builtin.os.tag) {
dummy: *@import("dummy.zig").Context,
},
.freestanding => switch (builtin.cpu.arch) {
.wasm32 => union(enum) {
webaudio: *@import("webaudio.zig").Context,
dummy: *@import("dummy.zig").Context,
},
else => union(enum) {
dummy: *@import("dummy.zig").Context,
},
@ -60,10 +56,6 @@ pub const Player = switch (builtin.os.tag) {
dummy: *@import("dummy.zig").Player,
},
.freestanding => switch (builtin.cpu.arch) {
.wasm32 => union(enum) {
webaudio: *@import("webaudio.zig").Player,
dummy: *@import("dummy.zig").Player,
},
else => union(enum) {
dummy: *@import("dummy.zig").Player,
},
@ -94,10 +86,6 @@ pub const Recorder = switch (builtin.os.tag) {
dummy: *@import("dummy.zig").Recorder,
},
.freestanding => switch (builtin.cpu.arch) {
.wasm32 => union(enum) {
webaudio: *@import("webaudio.zig").Recorder,
dummy: *@import("dummy.zig").Recorder,
},
else => union(enum) {
dummy: *@import("dummy.zig").Recorder,
},

275
src/sysaudio/webaudio.zig
View file

@ -1,275 +0,0 @@
const std = @import("std");
const js = @import("sysjs");
const main = @import("main.zig");
const backends = @import("backends.zig");
const util = @import("util.zig");
const default_sample_rate = 44_100; // Hz
const channel_size = 1024;
const channel_size_bytes = channel_size * @sizeOf(f32);
const default_playback = main.Device{
.id = "default-playback",
.name = "Default Device",
.mode = .playback,
.channels = undefined,
.formats = &.{.f32},
.sample_rate = .{
.min = 8_000,
.max = 96_000,
},
};
pub const Context = struct {
allocator: std.mem.Allocator,
devices_info: util.DevicesInfo,
pub fn init(allocator: std.mem.Allocator, options: main.Context.Options) !backends.Context {
_ = options;
const audio_context = js.global().get("AudioContext");
if (audio_context.is(.undefined))
return error.ConnectionRefused;
const ctx = try allocator.create(Context);
errdefer allocator.destroy(ctx);
ctx.* = .{
.allocator = allocator,
.devices_info = util.DevicesInfo.init(),
};
return .{ .webaudio = ctx };
}
pub fn deinit(ctx: *Context) void {
for (ctx.devices_info.list.items) |d|
freeDevice(ctx.allocator, d);
ctx.devices_info.list.deinit(ctx.allocator);
ctx.allocator.destroy(ctx);
}
pub fn refresh(ctx: *Context) !void {
for (ctx.devices_info.list.items) |d|
freeDevice(ctx.allocator, d);
ctx.devices_info.clear();
try ctx.devices_info.list.append(ctx.allocator, default_playback);
ctx.devices_info.list.items[0].channels = try ctx.allocator.alloc(main.ChannelPosition, 2);
ctx.devices_info.list.items[0].channels[0] = .front_left;
ctx.devices_info.list.items[0].channels[1] = .front_right;
ctx.devices_info.setDefault(.playback, 0);
}
pub fn devices(ctx: Context) []const main.Device {
return ctx.devices_info.list.items;
}
pub fn defaultDevice(ctx: Context, mode: main.Device.Mode) ?main.Device {
return ctx.devices_info.default(mode);
}
pub fn createPlayer(ctx: *Context, device: main.Device, writeFn: main.WriteFn, options: main.StreamOptions) !backends.Player {
const context_options = js.createMap();
defer context_options.deinit();
context_options.set("sampleRate", js.createNumber(options.sample_rate orelse default_sample_rate));
const audio_context = js.constructType("AudioContext", &.{context_options.toValue()});
const gain_node = audio_context.call("createGain", &.{
js.createNumber(1),
js.createNumber(0),
js.createNumber(device.channels.len),
}).view(.object);
const process_node = audio_context.call("createScriptProcessor", &.{
js.createNumber(channel_size),
js.createNumber(device.channels.len),
}).view(.object);
const player = try ctx.allocator.create(Player);
errdefer ctx.allocator.destroy(player);
var captures = try ctx.allocator.alloc(js.Value, 1);
captures[0] = js.createNumber(@intFromPtr(player));
const document = js.global().get("document").view(.object);
defer document.deinit();
const click_event_str = js.createString("click");
defer click_event_str.deinit();
const resume_on_click = js.createFunction(Player.resumeOnClick, captures);
_ = document.call("addEventListener", &.{ click_event_str.toValue(), resume_on_click.toValue() });
const audio_process_event = js.createFunction(Player.audioProcessEvent, captures);
defer audio_process_event.deinit();
process_node.set("onaudioprocess", audio_process_event.toValue());
player.* = .{
.allocator = ctx.allocator,
.audio_context = audio_context,
.process_node = process_node,
.gain_node = gain_node,
.process_captures = captures,
.resume_on_click = resume_on_click,
.buf = try ctx.allocator.alloc(u8, channel_size_bytes * device.channels.len),
.buf_js = js.constructType("Uint8Array", &.{js.createNumber(channel_size_bytes)}),
.is_paused = false,
.writeFn = writeFn,
.user_data = options.user_data,
.channels = device.channels,
.format = .f32,
.sample_rate = options.sample_rate orelse default_sample_rate,
};
return .{ .webaudio = player };
}
pub fn createRecorder(ctx: *Context, device: main.Device, readFn: main.ReadFn, options: main.StreamOptions) !backends.Recorder {
_ = readFn;
const recorder = try ctx.allocator.create(Recorder);
recorder.* = .{
.allocator = ctx.allocator,
.is_paused = false,
.vol = 1.0,
.channels = device.channels,
.format = options.format,
.sample_rate = options.sample_rate orelse default_sample_rate,
};
return .{ .webaudio = recorder };
}
};
pub const Player = struct {
allocator: std.mem.Allocator,
audio_context: js.Object,
process_node: js.Object,
gain_node: js.Object,
process_captures: []js.Value,
resume_on_click: js.Function,
buf: []u8,
buf_js: js.Object,
is_paused: bool,
writeFn: main.WriteFn,
user_data: ?*anyopaque,
channels: []main.ChannelPosition,
format: main.Format,
sample_rate: u24,
pub fn deinit(player: *Player) void {
player.resume_on_click.deinit();
player.buf_js.deinit();
player.gain_node.deinit();
player.process_node.deinit();
player.audio_context.deinit();
player.allocator.free(player.process_captures);
player.allocator.free(player.buf);
player.allocator.destroy(player);
}
pub fn start(player: *Player) !void {
const destination = player.audio_context.get("destination").view(.object);
defer destination.deinit();
_ = player.gain_node.call("connect", &.{destination.toValue()});
_ = player.process_node.call("connect", &.{player.gain_node.toValue()});
}
fn resumeOnClick(args: js.Object, _: usize, captures: []js.Value) js.Value {
const player = @as(*Player, @ptrFromInt(@as(usize, @intFromFloat(captures[0].view(.num)))));
player.play() catch {};
const document = js.global().get("document").view(.object);
defer document.deinit();
const event = args.getIndex(0).view(.object);
defer event.deinit();
_ = document.call("removeEventListener", &.{ event.toValue(), player.resume_on_click.toValue() });
return js.createUndefined();
}
fn audioProcessEvent(args: js.Object, _: usize, captures: []js.Value) js.Value {
const player = @as(*Player, @ptrFromInt(@as(usize, @intFromFloat(captures[0].view(.num)))));
const event = args.getIndex(0).view(.object);
defer event.deinit();
const output_buffer = event.get("outputBuffer").view(.object);
defer output_buffer.deinit();
player.writeFn(player.user_data, player.buf[0..channel_size]);
for (player.channels, 0..) |_, i| {
player.buf_js.copyBytes(player.buf[i * channel_size_bytes .. (i + 1) * channel_size_bytes]);
const buf_f32_js = js.constructType("Float32Array", &.{ player.buf_js.get("buffer"), player.buf_js.get("byteOffset"), js.createNumber(channel_size) });
defer buf_f32_js.deinit();
_ = output_buffer.call("copyToChannel", &.{ buf_f32_js.toValue(), js.createNumber(i) });
}
return js.createUndefined();
}
pub fn play(player: *Player) !void {
_ = player.audio_context.call("resume", &.{js.createUndefined()});
player.is_paused = false;
}
pub fn pause(player: *Player) !void {
_ = player.audio_context.call("suspend", &.{js.createUndefined()});
player.is_paused = true;
}
pub fn paused(player: *Player) bool {
return player.is_paused;
}
pub fn setVolume(player: *Player, vol: f32) !void {
const gain = player.gain_node.get("gain").view(.object);
defer gain.deinit();
gain.set("value", js.createNumber(vol));
}
pub fn volume(player: *Player) !f32 {
const gain = player.gain_node.get("gain").view(.object);
defer gain.deinit();
return @as(f32, @floatCast(gain.get("value").view(.num)));
}
};
pub const Recorder = struct {
allocator: std.mem.Allocator,
is_paused: bool,
vol: f32,
channels: []main.ChannelPosition,
format: main.Format,
sample_rate: u24,
pub fn deinit(recorder: *Recorder) void {
recorder.allocator.destroy(recorder);
}
pub fn start(recorder: *Recorder) !void {
_ = recorder;
}
pub fn record(recorder: *Recorder) !void {
recorder.is_paused = false;
}
pub fn pause(recorder: *Recorder) !void {
recorder.is_paused = true;
}
pub fn paused(recorder: *Recorder) bool {
return recorder.is_paused;
}
pub fn setVolume(recorder: *Recorder, vol: f32) !void {
recorder.vol = vol;
}
pub fn volume(recorder: *Recorder) !f32 {
return recorder.vol;
}
};
fn freeDevice(allocator: std.mem.Allocator, device: main.Device) void {
allocator.free(device.channels);
}