Sound (Linux): add dirty support

CMakeLists.txt

@@ -70,6 +70,7 @@ cmake_dependent_option(ENABLE_OPENCL "Enable opencl" ON "LINUX OR BSD OR WIN32"
 cmake_dependent_option(ENABLE_LIBCJSON "Enable libcjson" ON "LINUX OR WIN32" OFF)
 cmake_dependent_option(ENABLE_LIBNM "Enable libnm" ON "LINUX" OFF)
 cmake_dependent_option(ENABLE_FREETYPE "Enable freetype" ON "ANDROID" OFF)
+cmake_dependent_option(ENABLE_ALSA "Enable alsa-lib" ON "LINUX" OFF)
 cmake_dependent_option(ENABLE_THREADS "Enable multithreading" ON "Threads_FOUND AND NOT ANDROID" OFF)
 cmake_dependent_option(ENABLE_BUFFER "Enable stdout buffer" ON "LINUX OR APPLE OR BSD OR WIN32 OR ANDROID" OFF)
 cmake_dependent_option(USE_WIN_NTAPI "Allow using internal NTAPI" ON "WIN32" OFF)
@@ -342,7 +343,7 @@ if(LINUX)
         src/detection/poweradapter/poweradapter_nosupport.c
         src/detection/processes/processes_linux.c
         src/detection/qt.c
-        src/detection/sound/sound_nosupport.c
+        src/detection/sound/sound_linux.c
         src/detection/swap/swap_linux.c
         src/detection/temps/temps_linux.c
         src/detection/terminalfont/terminalfont_linux.c
@@ -662,6 +663,10 @@ ff_lib_enable(FREETYPE
     "freetype2"
     "FreeType2"
 )
+ff_lib_enable(ALSA
+    "alsa"
+    "ALSA"
+)
 
 if(ENABLE_THREADS)
     target_compile_definitions(libfastfetch PRIVATE FF_HAVE_THREADS)

completions/bash

@@ -379,6 +379,7 @@ __fastfetch_completion()
         "--lib-glx"
         "--lib-osmesa"
         "--lib-opencl"
+        "--lib-alsa"
         "--battery-dir"
     )
 

src/common/init.c

@@ -140,6 +140,7 @@ static void defaultConfig(FFinstance* instance)
     ffStrbufInitA(&instance->config.libOpenCL, 0);
     ffStrbufInitA(&instance->config.libcJSON, 0);
     ffStrbufInitA(&instance->config.libfreetype, 0);
+    ffStrbufInit(&instance->config.libAlsa);
     ffStrbufInit(&instance->config.libwlanapi);
     ffStrbufInit(&instance->config.libnm);
 
@@ -407,6 +408,7 @@ static void destroyConfig(FFinstance* instance)
     ffStrbufDestroy(&instance->config.libOpenCL);
     ffStrbufDestroy(&instance->config.libcJSON);
     ffStrbufDestroy(&instance->config.libfreetype);
+    ffStrbufDestroy(&instance->config.libAlsa);
     ffStrbufDestroy(&instance->config.libwlanapi);
     ffStrbufDestroy(&instance->config.libnm);
 
@@ -512,6 +514,9 @@ void ffListFeatures()
         #ifdef FF_HAVE_FREETYPE
             "freetype\n"
         #endif
+        #ifdef FF_HAVE_ALSA
+            "alsa-lib\n"
+        #endif
         #ifdef FF_HAVE_LIBNM
             "libnm\n"
         #endif

src/data/config_user.txt

@@ -426,4 +426,5 @@
 #--lib-osmesa /usr/lib/libOSMesa.so
 #--lib-opencl /usr/lib/libOpenCL.so
 #--lib-cjson /usr/lib/libcjson.so
+#--lib-cjson /usr/lib/libasound.so
 #--lib-freetype /data/data/com.termux/files/usr/lib

src/data/help.txt

@@ -98,6 +98,8 @@ Library options: Set the path of a library to load
     --lib-osmesa <path>
     --lib-opencl <path>
     --lib-cjson <path>
+    --lib-alsa <path>
+    --lib-freetype <path>
 
 Module specific options:
     --title-fqdn <?value>:                   Set if the title should use fully qualified domain name. Default is false

src/detection/sound/sound_linux.c

@@ -0,0 +1,89 @@
+#include "sound.h"
+
+#ifdef FF_HAVE_ALSA
+
+#include "common/library.h"
+#include "common/io.h"
+
+#include <alsa/asoundlib.h>
+
+static const char* doDetectSound(const FFinstance* instance, FFlist* devices)
+{
+    FF_LIBRARY_LOAD(asound, &instance->config.libAlsa, "dlopen asound failed", "libasound" FF_LIBRARY_EXTENSION, 2);
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(asound, snd_mixer_open);
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(asound, snd_mixer_attach);
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(asound, snd_mixer_selem_register);
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(asound, snd_mixer_load);
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(asound, snd_mixer_first_elem);
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(asound, snd_mixer_elem_next);
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(asound, snd_mixer_selem_is_active);
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(asound, snd_mixer_selem_get_playback_volume_range);
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(asound, snd_mixer_selem_get_playback_volume);
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(asound, snd_mixer_selem_get_name);
+    FF_LIBRARY_LOAD_SYMBOL_MESSAGE(asound, snd_mixer_close);
+
+    snd_mixer_t *mixer;
+    if (ffsnd_mixer_open(&mixer, 0) < 0)
+        return "snd_mixer_open() failed";
+
+    if (ffsnd_mixer_attach(mixer, "default") < 0)
+    {
+        ffsnd_mixer_close(mixer);
+        return "snd_mixer_attach(\"default\") failed";
+    }
+
+    if (ffsnd_mixer_selem_register(mixer, NULL, NULL) < 0)
+    {
+        ffsnd_mixer_close(mixer);
+        return "snd_mixer_selem_register() failed";
+    }
+
+    if (ffsnd_mixer_load(mixer) < 0)
+    {
+        ffsnd_mixer_close(mixer);
+        return "snd_mixer_load() failed";
+    }
+
+    for (snd_mixer_elem_t* elem = ffsnd_mixer_first_elem(mixer); elem; elem = ffsnd_mixer_elem_next(elem))
+    {
+        if (!ffsnd_mixer_selem_is_active(elem))
+            continue;
+
+        long min, max;
+        if (ffsnd_mixer_selem_get_playback_volume_range(elem, &min, &max) < 0)
+            continue;
+
+        long volume;
+        if (ffsnd_mixer_selem_get_playback_volume(elem, 0, &volume) < 0)
+            continue;
+
+        const char* name = ffsnd_mixer_selem_get_name(elem);
+
+        FFSoundDevice* device = (FFSoundDevice*) ffListAdd(devices);
+        device->main = strcmp(name, "Master") == 0;
+        device->volume = (uint8_t) ((double)(volume - min) * 100.0 / (double)(max - min) + 0.5);
+        ffStrbufInitS(&device->name, name);
+        ffStrbufInit(&device->manufacturer);
+    }
+
+    ffsnd_mixer_close(mixer);
+    return NULL;
+}
+
+#endif // FF_HAVE_ALSA
+
+const char* ffDetectSound(FF_MAYBE_UNUSED const FFinstance* instance, FF_MAYBE_UNUSED FFlist* devices /* List of FFSoundDevice */)
+{
+    #ifdef FF_HAVE_ALSA
+
+    ffSuppressIO(true);
+    const char* error = doDetectSound(instance, devices);
+    ffSuppressIO(false);
+    return error;
+
+    #else
+
+    return "Fastfetch was built without alsa support";
+
+    #endif
+}

src/fastfetch.h

@@ -164,6 +164,7 @@ typedef struct FFconfig
     FFstrbuf libOpenCL;
     FFstrbuf libcJSON;
     FFstrbuf libfreetype;
+    FFstrbuf libAlsa;
     FFstrbuf libwlanapi;
     FFstrbuf libnm;