[common/logging] Simplify logging logic and fix issues when logging before system is created (#3688)

- our logging code was bigger than spdlog itself, why???? just keep it simple
- fix issues when logging before logging system is even started
- removes the "initialized logging twice" issue
- removes uneeded indirection in file logging
- uses direct formatting instead of jumping hoopla-around the fmt::format() ressult
- code duplication and dead code removal as usual

I did explore dup2() but I think it's not worth the hassle
I did try `fwopen()` but it's better if things are just kept as-is.

there is a lot of noise because I removed a bunch of redundant files on logging and just put everything in one file

now normally this wouldn't be a good idea, however consider: the complexity of logging; it's less than 500 lines... does it really need a whole subsystem?!?!?! ITS JUST LOGGING

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/3688
Reviewed-by: crueter <crueter@eden-emu.dev>
Reviewed-by: DraVee <chimera@dravee.dev>
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

src/audio_core/adsp/apps/audio_renderer/audio_renderer.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
@@ -11,7 +11,7 @@
 #include "audio_core/audio_core.h"
 #include "audio_core/common/common.h"
 #include "audio_core/sink/sink.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/thread.h"
 #include "core/core.h"
 #include "core/core_timing.h"

src/audio_core/adsp/apps/opus/opus_decoder.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
@@ -12,7 +12,7 @@
 #include "audio_core/adsp/apps/opus/shared_memory.h"
 #include "audio_core/audio_core.h"
 #include "audio_core/common/common.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/thread.h"
 #include "core/core.h"
 #include "core/core_timing.h"

src/audio_core/in/audio_in_system.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
@@ -9,7 +9,7 @@
 #include "audio_core/audio_event.h"
 #include "audio_core/audio_manager.h"
 #include "audio_core/in/audio_in_system.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "core/core.h"
 #include "core/core_timing.h"
 #include "core/hle/kernel/k_event.h"

src/audio_core/out/audio_out_system.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
@@ -9,7 +9,7 @@
 #include "audio_core/audio_event.h"
 #include "audio_core/audio_manager.h"
 #include "audio_core/out/audio_out_system.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "core/core.h"
 #include "core/core_timing.h"
 #include "core/hle/kernel/k_event.h"

src/audio_core/renderer/command/data_source/decode.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
@@ -10,7 +10,7 @@
 #include "audio_core/renderer/command/data_source/decode.h"
 #include "audio_core/renderer/command/resample/resample.h"
 #include "common/fixed_point.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scratch_buffer.h"
 #include "core/guest_memory.h"
 #include "core/memory.h"

src/audio_core/renderer/command/mix/mix_ramp.cpp

@@ -1,10 +1,13 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "audio_core/adsp/apps/audio_renderer/command_list_processor.h"
 #include "audio_core/renderer/command/mix/mix_ramp.h"
 #include "common/fixed_point.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 
 namespace AudioCore::Renderer {
 

src/audio_core/renderer/command/mix/volume.cpp

@@ -1,10 +1,13 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "audio_core/adsp/apps/audio_renderer/command_list_processor.h"
 #include "audio_core/renderer/command/mix/volume.h"
 #include "common/fixed_point.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 
 namespace AudioCore::Renderer {
 /**

src/audio_core/renderer/nodes/node_states.cpp

@@ -1,8 +1,11 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2022 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include "audio_core/renderer/nodes/node_states.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 
 namespace AudioCore::Renderer {
 

src/audio_core/sink/cubeb_sink.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -10,7 +10,7 @@
 #include "audio_core/common/common.h"
 #include "audio_core/sink/cubeb_sink.h"
 #include "audio_core/sink/sink_stream.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scope_exit.h"
 #include "core/core.h"
 

src/audio_core/sink/oboe_sink.cpp

@@ -1,3 +1,6 @@
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
+// SPDX-License-Identifier: GPL-3.0-or-later
+
 // SPDX-FileCopyrightText: Copyright 2023 yuzu Emulator Project
 // SPDX-License-Identifier: GPL-2.0-or-later
 
@@ -9,7 +12,7 @@
 #include "audio_core/common/common.h"
 #include "audio_core/sink/oboe_sink.h"
 #include "audio_core/sink/sink_stream.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scope_exit.h"
 #include "core/core.h"
 

src/audio_core/sink/sdl2_sink.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -12,7 +12,7 @@
 #include "audio_core/common/common.h"
 #include "audio_core/sink/sdl2_sink.h"
 #include "audio_core/sink/sink_stream.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/scope_exit.h"
 #include "core/core.h"
 

src/audio_core/sink/sink_details.cpp

@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: Copyright 2025 Eden Emulator Project
+// SPDX-FileCopyrightText: Copyright 2026 Eden Emulator Project
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 // SPDX-FileCopyrightText: Copyright 2018 yuzu Emulator Project
@@ -20,7 +20,7 @@
 #include "audio_core/sink/sdl2_sink.h"
 #endif
 #include "audio_core/sink/null_sink.h"
-#include "common/logging/log.h"
+#include "common/logging.h"
 #include "common/settings_enums.h"
 
 namespace AudioCore::Sink {