Limit speed when no audio device is open. Fix #63

drhelius · Nov 10, 2024 · 2ce95b8 · 2ce95b8
1 parent 3efd2dc
commit 2ce95b8
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Showing 5 changed files with 25 additions and 1 deletion.
diff --git a/platforms/audio-shared/sound_queue.cpp b/platforms/audio-shared/sound_queue.cpp
@@ -164,6 +164,16 @@ int SoundQueue::GetSampleCount()
     return m_buffer_size * m_buffer_count - buffer_free;
 }
 
+int16_t* SoundQueue::GetCurrentlyPlaying()
+{
+    return m_currently_playing;
+}
+
+bool SoundQueue::IsOpen()
+{
+    return m_sound_open;
+}
+
 void SoundQueue::Write(int16_t* samples, int count, bool sync)
 {
     if (!m_sound_open)

diff --git a/platforms/audio-shared/sound_queue.h b/platforms/audio-shared/sound_queue.h
@@ -34,6 +34,7 @@ class SoundQueue
     void Write(int16_t* samples, int count, bool sync);
     int GetSampleCount();
     int16_t* GetCurrentlyPlaying();
+    bool IsOpen();
 
 private:
     int16_t* volatile m_buffers;

diff --git a/platforms/desktop-shared/application.cpp b/platforms/desktop-shared/application.cpp
@@ -774,12 +774,19 @@ static void render(void)
 
 static void frame_throttle(void)
 {
-    if (emu_is_empty() || emu_is_paused() || config_emulator.ffwd)
+    if (emu_is_empty() || emu_is_paused() || !emu_is_audio_open() || config_emulator.ffwd)
     {
         float elapsed = (float)((frame_time_end - frame_time_start) * 1000) / SDL_GetPerformanceFrequency();
 
         float min = 16.666f;
 
+        if (!emu_is_audio_open())
+        {
+            GC_RuntimeInfo runtime;
+            emu_get_runtime(runtime);
+            min = runtime.region == Region_NTSC ? 16.666f : 20.0f;
+        }
+
         if (config_emulator.ffwd)
         {
             switch (config_emulator.ffwd_speed)

diff --git a/platforms/desktop-shared/emu.cpp b/platforms/desktop-shared/emu.cpp
@@ -208,6 +208,11 @@ bool emu_is_audio_enabled(void)
     return audio_enabled;
 }
 
+bool emu_is_audio_open(void)
+{
+    return sound_queue->IsOpen();
+}
+
 void emu_palette(GC_Color* palette)
 {
     gearcoleco->GetVideo()->SetCustomPalette(palette);

diff --git a/platforms/desktop-shared/emu.h b/platforms/desktop-shared/emu.h
@@ -60,6 +60,7 @@ EXTERN void emu_dissasemble_rom(void);
 EXTERN void emu_audio_mute(bool mute);
 EXTERN void emu_audio_reset(void);
 EXTERN bool emu_is_audio_enabled(void);
+EXTERN bool emu_is_audio_open(void);
 EXTERN void emu_palette(GC_Color* palette);
 EXTERN void emu_predefined_palette(int palette);
 EXTERN void emu_save_ram(const char* file_path);