sysaudio: add webaudio backend
This commit is contained in:
Ali Chraghi
Stephen Gutekanst
parent
052d3a7da8
commit
f9b3ac2106
11 changed files with 841 additions and 487 deletions
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@ -18,7 +18,7 @@ pub const Context = struct {
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const Watcher = struct {
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deviceChangeFn: main.DeviceChangeFn,
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userdata: ?*anyopaque,
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user_data: ?*anyopaque,
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};
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pub fn init(allocator: std.mem.Allocator, options: main.Context.Options) !backends.BackendContext {
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@ -44,7 +44,7 @@ pub const Context = struct {
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.default_source = null,
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.watcher = if (options.deviceChangeFn) |dcf| .{
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.deviceChangeFn = dcf,
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.userdata = options.userdata,
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.user_data = options.user_data,
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} else null,
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};
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@ -97,13 +97,13 @@ pub const Context = struct {
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return .{ .pulseaudio = self };
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}
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fn subscribeOp(_: ?*c.pa_context, _: c.pa_subscription_event_type_t, _: u32, userdata: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Context, @alignCast(@alignOf(*Context), userdata.?));
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self.watcher.?.deviceChangeFn(self.watcher.?.userdata);
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fn subscribeOp(_: ?*c.pa_context, _: c.pa_subscription_event_type_t, _: u32, user_data: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Context, @alignCast(@alignOf(*Context), user_data.?));
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self.watcher.?.deviceChangeFn(self.watcher.?.user_data);
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}
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fn contextStateOp(ctx: ?*c.pa_context, userdata: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Context, @alignCast(@alignOf(*Context), userdata.?));
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fn contextStateOp(ctx: ?*c.pa_context, user_data: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Context, @alignCast(@alignOf(*Context), user_data.?));
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self.ctx_state = c.pa_context_get_state(ctx);
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c.pa_threaded_mainloop_signal(self.main_loop, 0);
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@ -159,8 +159,8 @@ pub const Context = struct {
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}
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}
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fn serverInfoOp(_: ?*c.pa_context, info: [*c]const c.pa_server_info, userdata: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Context, @alignCast(@alignOf(*Context), userdata.?));
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fn serverInfoOp(_: ?*c.pa_context, info: [*c]const c.pa_server_info, user_data: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Context, @alignCast(@alignOf(*Context), user_data.?));
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defer c.pa_threaded_mainloop_signal(self.main_loop, 0);
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self.default_sink = self.allocator.dupeZ(u8, std.mem.span(info.*.default_sink_name)) catch return;
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@ -170,8 +170,8 @@ pub const Context = struct {
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};
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}
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fn sinkInfoOp(_: ?*c.pa_context, info: [*c]const c.pa_sink_info, eol: c_int, userdata: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Context, @alignCast(@alignOf(*Context), userdata.?));
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fn sinkInfoOp(_: ?*c.pa_context, info: [*c]const c.pa_sink_info, eol: c_int, user_data: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Context, @alignCast(@alignOf(*Context), user_data.?));
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if (eol != 0) {
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c.pa_threaded_mainloop_signal(self.main_loop, 0);
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return;
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@ -180,8 +180,8 @@ pub const Context = struct {
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self.deviceInfoOp(info, .playback) catch return;
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}
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fn sourceInfoOp(_: ?*c.pa_context, info: [*c]const c.pa_source_info, eol: c_int, userdata: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Context, @alignCast(@alignOf(*Context), userdata.?));
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fn sourceInfoOp(_: ?*c.pa_context, info: [*c]const c.pa_source_info, eol: c_int, user_data: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Context, @alignCast(@alignOf(*Context), user_data.?));
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if (eol != 0) {
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c.pa_threaded_mainloop_signal(self.main_loop, 0);
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return;
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@ -274,19 +274,22 @@ pub const Context = struct {
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}
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}
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return .{
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.pulseaudio = .{
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.main_loop = self.main_loop,
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.ctx = self.ctx,
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.stream = stream.?,
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._channels = device.channels,
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._format = format,
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.sample_rate = sample_rate,
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.writeFn = writeFn,
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.write_ptr = undefined,
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.vol = 1.0,
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},
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var player = try self.allocator.create(Player);
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player.* = .{
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.allocator = self.allocator,
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.main_loop = self.main_loop,
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.ctx = self.ctx,
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.stream = stream.?,
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.write_ptr = undefined,
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.vol = 1.0,
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.sample_rate = sample_rate,
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.writeFn = writeFn,
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.user_data = options.user_data,
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.channels = device.channels,
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.format = format,
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.write_step = format.frameSize(device.channels.len),
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};
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return .{ .pulseaudio = player };
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}
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const StreamStatus = struct {
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@ -298,8 +301,8 @@ pub const Context = struct {
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},
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};
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fn streamStateOp(stream: ?*c.pa_stream, userdata: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*StreamStatus, @alignCast(@alignOf(*StreamStatus), userdata.?));
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fn streamStateOp(stream: ?*c.pa_stream, user_data: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*StreamStatus, @alignCast(@alignOf(*StreamStatus), user_data.?));
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switch (c.pa_stream_get_state(stream)) {
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c.PA_STREAM_UNCONNECTED,
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@ -320,15 +323,19 @@ pub const Context = struct {
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};
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pub const Player = struct {
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allocator: std.mem.Allocator,
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main_loop: *c.pa_threaded_mainloop,
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ctx: *c.pa_context,
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stream: *c.pa_stream,
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_channels: []main.Channel,
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_format: main.Format,
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sample_rate: u24,
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writeFn: main.WriteFn,
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write_ptr: [*]u8,
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vol: f32,
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sample_rate: u24,
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writeFn: main.WriteFn,
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user_data: ?*anyopaque,
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channels: []main.Channel,
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format: main.Format,
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write_step: u8,
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pub fn deinit(self: *Player) void {
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c.pa_threaded_mainloop_lock(self.main_loop);
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@ -352,9 +359,8 @@ pub const Player = struct {
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c.pa_stream_set_write_callback(self.stream, playbackStreamWriteOp, self);
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}
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fn playbackStreamWriteOp(_: ?*c.pa_stream, nbytes: usize, userdata: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Player, @alignCast(@alignOf(*Player), userdata.?));
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var parent = @fieldParentPtr(main.Player, "data", @ptrCast(*backends.BackendPlayer, self));
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fn playbackStreamWriteOp(_: ?*c.pa_stream, nbytes: usize, user_data: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Player, @alignCast(@alignOf(*Player), user_data.?));
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var frames_left = nbytes;
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while (frames_left > 0) {
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@ -371,12 +377,12 @@ pub const Player = struct {
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return;
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}
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for (self.channels()) |*ch, i| {
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ch.*.ptr = self.write_ptr + self.format().frameSize(i);
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for (self.channels) |*ch, i| {
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ch.*.ptr = self.write_ptr + self.format.frameSize(i);
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}
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const frames = chunk_size / self.format().frameSize(self.channels().len);
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self.writeFn(parent, frames);
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const frames = chunk_size / self.format.frameSize(self.channels.len);
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self.writeFn(self.user_data, frames);
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if (c.pa_stream_write(self.stream, self.write_ptr, chunk_size, null, 0, c.PA_SEEK_RELATIVE) != 0) {
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if (std.debug.runtime_safety) unreachable;
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@ -422,7 +428,7 @@ pub const Player = struct {
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var cvolume: c.pa_cvolume = undefined;
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_ = c.pa_cvolume_init(&cvolume);
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_ = c.pa_cvolume_set(&cvolume, @intCast(c_uint, self.channels().len), c.pa_sw_volume_from_linear(vol));
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_ = c.pa_cvolume_set(&cvolume, @intCast(c_uint, self.channels.len), c.pa_sw_volume_from_linear(vol));
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performOperation(
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self.main_loop,
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@ -436,8 +442,8 @@ pub const Player = struct {
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);
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}
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fn successOp(_: ?*c.pa_context, success: c_int, userdata: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Player, @alignCast(@alignOf(*Player), userdata.?));
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fn successOp(_: ?*c.pa_context, success: c_int, user_data: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Player, @alignCast(@alignOf(*Player), user_data.?));
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if (success == 1)
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c.pa_threaded_mainloop_signal(self.main_loop, 0);
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}
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@ -459,8 +465,8 @@ pub const Player = struct {
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return self.vol;
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}
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fn sinkInputInfoOp(_: ?*c.pa_context, info: [*c]const c.pa_sink_input_info, eol: c_int, userdata: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Player, @alignCast(@alignOf(*Player), userdata.?));
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fn sinkInputInfoOp(_: ?*c.pa_context, info: [*c]const c.pa_sink_input_info, eol: c_int, user_data: ?*anyopaque) callconv(.C) void {
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var self = @ptrCast(*Player, @alignCast(@alignOf(*Player), user_data.?));
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if (eol != 0) {
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c.pa_threaded_mainloop_signal(self.main_loop, 0);
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@ -470,19 +476,6 @@ pub const Player = struct {
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self.vol = @intToFloat(f32, info.*.volume.values[0]) / @intToFloat(f32, c.PA_VOLUME_NORM);
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}
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pub fn writeRaw(self: *Player, channel: main.Channel, frame: usize, sample: anytype) void {
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var ptr = channel.ptr + self.format().frameSize(self.channels().len) * frame;
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std.mem.bytesAsValue(@TypeOf(sample), ptr[0..@sizeOf(@TypeOf(sample))]).* = sample;
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}
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pub fn channels(self: Player) []main.Channel {
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return self._channels;
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}
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pub fn format(self: Player) main.Format {
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return self._format;
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}
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pub fn sampleRate(self: Player) u24 {
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return self.sample_rate;
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}
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@ -552,7 +545,7 @@ pub fn toPAFormat(format: main.Format) !c.pa_sample_format_t {
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.i32 => if (is_little) c.PA_SAMPLE_S32LE else c.PA_SAMPLE_S32BE,
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.f32 => if (is_little) c.PA_SAMPLE_FLOAT32LE else c.PA_SAMPLE_FLOAT32BE,
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.f64, .i8 => error.Invalid,
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.i8 => error.Invalid,
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};
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}
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