Add audio devices

include/GsrInfo.hpp

@@ -62,5 +62,12 @@ namespace gsr {
         NO_DRM_CARD
     };
 
+    struct AudioDevice {
+        std::string name;
+        std::string description;
+    };
+
     GsrInfoExitStatus get_gpu_screen_recorder_info(GsrInfo *gsr_info);
+
+    std::vector<AudioDevice> get_audio_devices();
 }

include/Theme.hpp

@@ -15,5 +15,6 @@ namespace gsr {
     };
 
     void init_theme(const gsr::GsrInfo &gsr_info);
+    void deinit_theme();
     const Theme& get_theme();
 }

src/GsrInfo.cpp

@@ -176,4 +176,44 @@ namespace gsr {
 
         return GsrInfoExitStatus::FAILED_TO_RUN_COMMAND;
     }
+
+    static AudioDevice parse_audio_device_line(const std::string &line) {
+        AudioDevice audio_device;
+        const size_t space_index = line.find(' ');
+        if(space_index == std::string::npos)
+            return audio_device;
+
+        const std::string_view audio_input_name = {line.c_str(), space_index};
+        const std::string_view audio_input_description = {line.c_str() + space_index + 1, line.size() - (space_index + 1)};
+        audio_device.name.assign(audio_input_name.data(), audio_input_name.size());
+        audio_device.description.assign(audio_input_description.data(), audio_input_description.size());
+        return audio_device;
+    }
+
+    std::vector<AudioDevice> get_audio_devices() {
+        std::vector<AudioDevice> audio_devices;
+
+        FILE *f = popen("gpu-screen-recorder --list-audio-devices", "r");
+        if(!f) {
+            fprintf(stderr, "error: 'gpu-screen-recorder --info' failed\n");
+            return audio_devices;
+        }
+
+        char output[16384];
+        ssize_t bytes_read = fread(output, 1, sizeof(output) - 1, f);
+        if(bytes_read < 0 || ferror(f)) {
+            fprintf(stderr, "error: failed to read 'gpu-screen-recorder --info' output\n");
+            pclose(f);
+            return audio_devices;
+        }
+        output[bytes_read] = '\0';
+
+        string_split_char(output, '\n', [&](std::string_view line) {
+            const std::string line_str(line.data(), line.size());
+            audio_devices.push_back(parse_audio_device_line(line_str));
+            return true;
+        });
+
+        return audio_devices;
+    }
 }

src/Theme.cpp

@@ -3,32 +3,39 @@
 #include <assert.h>
 
 namespace gsr {
-    static Theme theme;
-    static bool initialized = false;
+    static Theme *theme = nullptr;
 
     void init_theme(const gsr::GsrInfo &gsr_info) {
+        assert(!theme);
+        theme = new Theme();
+
         switch(gsr_info.gpu_info.vendor) {
             case gsr::GpuVendor::UNKNOWN: {
                 break;
             }
             case gsr::GpuVendor::AMD: {
-                theme.tint_color = mgl::Color(221, 0, 49);
+                theme->tint_color = mgl::Color(221, 0, 49);
                 break;
             }
             case gsr::GpuVendor::INTEL: {
-                theme.tint_color = mgl::Color(8, 109, 183);
+                theme->tint_color = mgl::Color(8, 109, 183);
                 break;
             }
             case gsr::GpuVendor::NVIDIA: {
-                theme.tint_color = mgl::Color(118, 185, 0);
+                theme->tint_color = mgl::Color(118, 185, 0);
                 break;
             }
         }
-        initialized = true;
+    }
+
+    void deinit_theme() {
+        assert(theme);
+        delete theme;
+        theme = nullptr;
     }
 
     const Theme& get_theme() {
-        assert(initialized);
-        return theme;
+        assert(theme);
+        return *theme;
     }
 }

src/main.cpp

@@ -149,6 +149,9 @@ int main(int argc, char **argv) {
         fprintf(stderr, "error: failed to get gpu-screen-recorder info\n");
         exit(1);
     }
+
+    const std::vector<gsr::AudioDevice> audio_devices = gsr::get_audio_devices();
+
     gsr::init_theme(gsr_info);
 
     std::string program_root_dir = dirname(argv[0]);
@@ -482,6 +485,11 @@ int main(int argc, char **argv) {
         gsr::Page *settings_content_page = settings_content_pages[i];
 
         auto record_area_box = std::make_unique<gsr::ComboBox>(&title_font);
+        record_area_box->set_position(mgl::vec2f(50.0f, 50.0f));
+
+        const mgl::vec2f record_area_pos = record_area_box->get_position();
+        const mgl::vec2f record_area_size = record_area_box->get_size();
+
         if(gsr_info.supported_capture_options.window)
             record_area_box->add_item("Window", "window");
         if(gsr_info.supported_capture_options.focused)
@@ -497,6 +505,13 @@ int main(int argc, char **argv) {
             record_area_box->add_item("Desktop portal", "portal");
         settings_content_page->add_widget(std::move(record_area_box));
 
+        auto audio_device_box = std::make_unique<gsr::ComboBox>(&title_font);
+        audio_device_box->set_position(record_area_pos + mgl::vec2f(0.0f, record_area_size.y + 50.0f));
+        for(const auto &audio_device : audio_devices) {
+            audio_device_box->add_item(audio_device.description, audio_device.name);
+        }
+        settings_content_page->add_widget(std::move(audio_device_box));
+
         auto back_button = std::make_unique<gsr::Button>(&title_font, "Back", mgl::vec2f(window_size.x / 10, window_size.y / 15), gsr::get_theme().scrollable_page_bg_color);
         back_button->set_position(settings_page_position + mgl::vec2f(settings_page_size.x + window_size.x / 50, 0.0f).floor());
         back_button->on_click = settings_back_button_callback;
@@ -622,5 +637,6 @@ int main(int argc, char **argv) {
     }
 
     fprintf(stderr, "shutting down!\n");
+    gsr::deinit_theme();
     return 0;
 }