From 9f0a5825f063b16642caa32fdef76ddb7bafb27f Mon Sep 17 00:00:00 2001
From: loki <loki@fakeemail.com>
Date: Fri, 24 Jan 2020 23:17:05 +0100
Subject: [PATCH] Select audio endpoint based on config option audio_sink on
 Windows

---
 assets/sunshine.conf                 |  6 +++++-
 sunshine/platform/windows_wasapi.cpp | 26 +++++++++++++++++++-------
 2 files changed, 24 insertions(+), 8 deletions(-)

diff --git a/assets/sunshine.conf b/assets/sunshine.conf
index 461b950d..29f2a12a 100644
--- a/assets/sunshine.conf
+++ b/assets/sunshine.conf
@@ -62,9 +62,13 @@ fec_percentage = 10
 # If you do not specify this variable, pulseaudio will select the default monitor device.
 #
 # You can find the name of the audio sink using the following command:
+# !! Linux only !!
 # pacmd list-sources | grep "name:"
 # audio_sink = alsa_output.pci-0000_09_00.3.analog-stereo.monitor
-
+#
+# !! Windows only !!
+# tools\audio-info.exe
+# audio_sink = {0.0.0.00000000}.{FD47D9CC-4218-4135-9CE2-0C195C87405B}
 
 # !! Windows only !!
 # You can select the video card you want to stream:
diff --git a/sunshine/platform/windows_wasapi.cpp b/sunshine/platform/windows_wasapi.cpp
index ca105fd9..4c773a33 100644
--- a/sunshine/platform/windows_wasapi.cpp
+++ b/sunshine/platform/windows_wasapi.cpp
@@ -6,8 +6,11 @@
 #include <mmdeviceapi.h>
 #include <audioclient.h>
 
+#include <codecvt>
+
 #include <synchapi.h>
 
+#include "sunshine/config.h"
 #include "sunshine/main.h"
 #include "common.h"
 
@@ -83,14 +86,23 @@ public:
     }
 
     device_t::pointer device_p{};
-    status = device_enum->GetDefaultAudioEndpoint(
-      eRender,
-      eConsole,
-      &device_p);
+
+    if(config::audio.sink.empty()) {
+      status = device_enum->GetDefaultAudioEndpoint(
+        eRender,
+        eConsole,
+        &device_p);
+    }
+    else {
+      std::wstring_convert<std::codecvt_utf8_utf16<wchar_t>, wchar_t> converter;
+      auto wstring_device_id = converter.from_bytes(config::audio.sink);
+
+      status = device_enum->GetDevice(wstring_device_id.c_str(), &device_p);
+    }
     device.reset(device_p);
 
     if (FAILED(status)) {
-      BOOST_LOG(error) << "Couldn't create Device [0x"sv << util::hex(status).to_string_view() << ']';
+      BOOST_LOG(error) << "Couldn't create audio Device [0x"sv << util::hex(status).to_string_view() << ']';
 
       return -1;
     }
@@ -104,7 +116,7 @@ public:
     audio_client.reset(audio_client_p);
 
     if (FAILED(status)) {
-      BOOST_LOG(error) << "Couldn't activate Device [0x"sv << util::hex(status).to_string_view() << ']';
+      BOOST_LOG(error) << "Couldn't activate audio Device [0x"sv << util::hex(status).to_string_view() << ']';
 
       return -1;
     }
@@ -167,7 +179,7 @@ public:
     std::uint32_t frames;
     status = audio_client->GetBufferSize(&frames);
     if (FAILED(status)) {
-      BOOST_LOG(error) << "Couldn't acquire the number of frames [0x"sv << util::hex(status).to_string_view() << ']';
+      BOOST_LOG(error) << "Couldn't acquire the number of audio frames [0x"sv << util::hex(status).to_string_view() << ']';
 
       return -1;
     }