From a560a610d9e3f48f22bd3a895da76e27a49896a3 Mon Sep 17 00:00:00 2001
From: Geoffrey McRae <geoff@hostfission.com>
Date: Thu, 27 Jan 2022 17:57:30 +1100
Subject: [PATCH] [client] audio: allow building without any audio support

---
 client/CMakeLists.txt | 14 ++++++++++----
 client/src/audio.c    |  4 ++++
 client/src/audio.h    | 10 ++++++++++
 client/src/main.c     |  2 ++
 4 files changed, 26 insertions(+), 4 deletions(-)

diff --git a/client/CMakeLists.txt b/client/CMakeLists.txt
index 4e003972..ac0bef16 100644
--- a/client/CMakeLists.txt
+++ b/client/CMakeLists.txt
@@ -26,7 +26,6 @@ include(UninstallTarget)
 
 find_package(PkgConfig)
 pkg_check_modules(FONTCONFIG REQUIRED IMPORTED_TARGET fontconfig)
-pkg_check_modules(SAMPLERATE REQUIRED IMPORTED_TARGET samplerate)
 
 option(ENABLE_OPENGL "Enable the OpenGL renderer"       ON)
 add_feature_info(ENABLE_OPENGL ENABLE_OPENGL "Legacy OpenGL renderer.")
@@ -152,7 +151,6 @@ add_subdirectory("${PROJECT_TOP}/repos/cimgui"    "${CMAKE_BINARY_DIR}/cimgui" E
 
 add_subdirectory(displayservers)
 add_subdirectory(renderers)
-add_subdirectory(audiodevs)
 
 add_executable(looking-glass-client ${SOURCES})
 
@@ -161,16 +159,24 @@ target_compile_definitions(looking-glass-client PRIVATE CIMGUI_DEFINE_ENUMS_AND_
 target_link_libraries(looking-glass-client
 	${EXE_FLAGS}
 	PkgConfig::FONTCONFIG
-	PkgConfig::SAMPLERATE
 	lg_common
 	displayservers
 	lgmp
 	purespice
 	renderers
 	cimgui
-	audiodevs
 )
 
+if (ENABLE_PIPEWIRE OR ENABLE_PULSEAUDIO)
+	add_definitions(-D ENABLE_AUDIO)
+	add_subdirectory(audiodevs)
+	pkg_check_modules(SAMPLERATE REQUIRED IMPORTED_TARGET samplerate)
+	target_link_libraries(looking-glass-client
+		PkgConfig::SAMPLERATE
+		audiodevs
+	)
+endif()
+
 install(TARGETS looking-glass-client
 	RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
 	COMPONENT binary)
diff --git a/client/src/audio.c b/client/src/audio.c
index 587fad01..2df83a9a 100644
--- a/client/src/audio.c
+++ b/client/src/audio.c
@@ -18,6 +18,8 @@
  * Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
+#if ENABLE_AUDIO
+
 #include "audio.h"
 #include "main.h"
 #include "common/array.h"
@@ -691,3 +693,5 @@ void audio_tick(unsigned long long tickCount)
 
   app_invalidateGraphs();
 }
+
+#endif
diff --git a/client/src/audio.h b/client/src/audio.h
index e4ebccb6..6e256130 100644
--- a/client/src/audio.h
+++ b/client/src/audio.h
@@ -18,6 +18,8 @@
  * Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
+#if ENABLE_AUDIO
+
 #include <stdbool.h>
 #include <purespice.h>
 
@@ -39,3 +41,11 @@ void audio_recordVolume(int channels, const uint16_t volume[]);
 void audio_recordMute(bool mute);
 
 void audio_tick(unsigned long long tickCount);
+
+#else
+
+static inline void audio_init(void) {}
+static inline void audio_free(void) {}
+static inline void audio_tick(unsigned long long tickCount) {}
+
+#endif
diff --git a/client/src/main.c b/client/src/main.c
index c543e62b..ec22f15b 100644
--- a/client/src/main.c
+++ b/client/src/main.c
@@ -870,6 +870,7 @@ int spiceThread(void * arg)
       .release = cb_spiceRelease,
       .request = cb_spiceRequest
     },
+#if ENABLE_AUDIO
     .playback =
     {
       .enable = audio_supportsPlayback(),
@@ -887,6 +888,7 @@ int spiceThread(void * arg)
       .mute   = audio_recordMute,
       .stop   = audio_recordStop
     }
+#endif
   };
 
   if (!purespice_connect(&config))