From 011f105bee60346bacd3466cb188b60b31872859 Mon Sep 17 00:00:00 2001
From: Rekai Musuka <rekai@musuka.dev>
Date: Fri, 21 Oct 2022 05:13:09 -0300
Subject: [PATCH] feat(config): add config option to mute ZBA

---
 example.toml     |  2 ++
 src/config.zig   |  3 +++
 src/platform.zig | 10 ++++++++--
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/example.toml b/example.toml
index 8e3aa00..cbf5c31 100644
--- a/example.toml
+++ b/example.toml
@@ -4,6 +4,8 @@
 win_scale = 4
 # Enable VSYNC on the UI thread
 vsync = true
+# Mute ZBA
+mute = false
 
 [Guest]
 # Sync Emulation to Audio 
diff --git a/src/config.zig b/src/config.zig
index 0573d40..3434e0c 100644
--- a/src/config.zig
+++ b/src/config.zig
@@ -18,6 +18,8 @@ const Config = struct {
         ///
         /// Note: This does not affect whether Emulation is synced to 59Hz
         vsync: bool = true,
+        /// Mute ZBA
+        mute: bool = false,
     };
 
     // Settings realted to the emulation itself
@@ -59,6 +61,7 @@ pub fn load(allocator: Allocator, config_path: []const u8) !void {
     if (table.keys.get("Host")) |host| {
         if (host.Table.keys.get("win_scale")) |scale| state.host.win_scale = scale.Integer;
         if (host.Table.keys.get("vsync")) |vsync| state.host.vsync = vsync.Boolean;
+        if (host.Table.keys.get("mute")) |mute| state.host.mute = mute.Boolean;
     }
 
     if (table.keys.get("Guest")) |guest| {
diff --git a/src/platform.zig b/src/platform.zig
index d623748..b587fc4 100644
--- a/src/platform.zig
+++ b/src/platform.zig
@@ -178,10 +178,16 @@ const Audio = struct {
 
     export fn callback(userdata: ?*anyopaque, stream: [*c]u8, len: c_int) void {
         const apu = @ptrCast(*Apu, @alignCast(@alignOf(*Apu), userdata));
-        _ = SDL.SDL_AudioStreamGet(apu.stream, stream, len);
+
+        // TODO: Find a better way to mute this
+        if (!config.config().host.mute) {
+            _ = SDL.SDL_AudioStreamGet(apu.stream, stream, len);
+        } else {
+            // FIXME: I don't think this hack to remove DC Offset is acceptable :thinking:
+            std.mem.set(u8, stream[0..@intCast(usize, len)], 0x40);
+        }
 
         // If we don't write anything, play silence otherwise garbage will be played
-        // FIXME: I don't think this hack to remove DC Offset is acceptable :thinking:
         // if (written == 0) std.mem.set(u8, stream[0..@intCast(usize, len)], 0x40);
     }
 };