From: Holger Schemel <info@artsoft.org>
Date: Mon, 22 Apr 2024 19:13:23 +0000 (+0200)
Subject: added setup option to select 22500 or 44100 Hz audio sample rate
X-Git-Tag: 4.4.0.0-test-1~49
X-Git-Url: https://git.artsoft.org/?a=commitdiff_plain;h=a1f6dc934c786646efbae4d30177665e3859d38b;p=rocksndiamonds.git

added setup option to select 22500 or 44100 Hz audio sample rate
---

diff --git a/src/files.c b/src/files.c
index ce6928b7..5ae706b9 100644
--- a/src/files.c
+++ b/src/files.c
@@ -10867,6 +10867,10 @@ static struct TokenInfo global_setup_tokens[] =
     TYPE_INTEGER,
     &setup.volume_music,			"volume_music"
   },
+  {
+    TYPE_SWITCH,
+    &setup.audio_sample_rate_44100,		"audio_sample_rate_44100"
+  },
   {
     TYPE_SWITCH,
     &setup.network_mode,			"network_mode"
@@ -11662,6 +11666,7 @@ static void setSetupInfoToDefaults(struct SetupInfo *si)
   si->volume_simple = 100;		// percent
   si->volume_loops = 100;		// percent
   si->volume_music = 100;		// percent
+  si->audio_sample_rate_44100 = FALSE;
 
   si->network_mode = FALSE;
   si->network_player_nr = 0;		// first player
diff --git a/src/libgame/sdl.c b/src/libgame/sdl.c
index 76c70cc4..a19defa3 100644
--- a/src/libgame/sdl.c
+++ b/src/libgame/sdl.c
@@ -2512,8 +2512,10 @@ void SDLOpenAudio(void)
     return;
   }
 
-  if (Mix_OpenAudio(DEFAULT_AUDIO_SAMPLE_RATE, MIX_DEFAULT_FORMAT,
-		    AUDIO_NUM_CHANNELS_STEREO,
+  // set audio sample rate for mixer
+  audio.sample_rate = (setup.audio_sample_rate_44100 ? 44100 : 22050);
+
+  if (Mix_OpenAudio(audio.sample_rate, MIX_DEFAULT_FORMAT, AUDIO_NUM_CHANNELS_STEREO,
 		    setup.system.audio_fragment_size) < 0)
   {
     Warn("Mix_OpenAudio() failed: %s", SDL_GetError());
@@ -2543,6 +2545,12 @@ void SDLCloseAudio(void)
   SDL_QuitSubSystem(SDL_INIT_AUDIO);
 }
 
+void SDLReopenAudio(void)
+{
+  SDLCloseAudio();
+  SDLOpenAudio();
+}
+
 
 // ============================================================================
 // event functions
diff --git a/src/libgame/sdl.h b/src/libgame/sdl.h
index 2caf6af0..bbbaa767 100644
--- a/src/libgame/sdl.h
+++ b/src/libgame/sdl.h
@@ -445,6 +445,7 @@ void SDLSetMouseCursor(struct MouseCursorInfo *);
 
 void SDLOpenAudio(void);
 void SDLCloseAudio(void);
+void SDLReopenAudio(void);
 
 void SDLWaitEvent(Event *);
 void SDLCorrectRawMousePosition(int *, int *);
diff --git a/src/libgame/system.c b/src/libgame/system.c
index 37fe3a77..a1f009f7 100644
--- a/src/libgame/system.c
+++ b/src/libgame/system.c
@@ -1668,6 +1668,8 @@ void OpenAudio(void)
   audio.device_name = NULL;
   audio.device_fd = -1;
 
+  audio.sample_rate = DEFAULT_AUDIO_SAMPLE_RATE;
+
   audio.num_channels = 0;
   audio.music_channel = 0;
   audio.first_sound_channel = 0;
diff --git a/src/libgame/system.h b/src/libgame/system.h
index 6706f201..d8ca9a29 100644
--- a/src/libgame/system.h
+++ b/src/libgame/system.h
@@ -1114,6 +1114,8 @@ struct AudioSystemInfo
   char *device_name;
   int device_fd;
 
+  int sample_rate;
+
   int num_channels;
   int music_channel;
   int first_sound_channel;
@@ -1541,6 +1543,7 @@ struct SetupInfo
   int volume_simple;
   int volume_loops;
   int volume_music;
+  boolean audio_sample_rate_44100;
 
   boolean network_mode;
   int network_player_nr;
diff --git a/src/screens.c b/src/screens.c
index ea44e566..c7a69c30 100644
--- a/src/screens.c
+++ b/src/screens.c
@@ -8083,6 +8083,8 @@ static struct TokenInfo setup_info_sound[] =
   { TYPE_ENTER_LIST,	execSetupChooseVolumeMusic,	"Music Volume:"			},
   { TYPE_STRING,	&volume_music_text,		""				},
   { TYPE_EMPTY,		NULL,				""				},
+  { TYPE_SWITCH,	&setup.audio_sample_rate_44100,	"44100 Hz audio mixing:"	},
+  { TYPE_EMPTY,		NULL,				""				},
   { TYPE_LEAVE_MENU,	execSetupMain, 			"Back"				},
 
   { 0,			NULL,				NULL				}
@@ -8535,6 +8537,10 @@ static void changeSetupValue(int screen_pos, int setup_info_pos_raw, int dx)
   if (si->value == &setup.fullscreen)
     ToggleFullscreenIfNeeded();
 
+  // audio sample rate may have changed at this point
+  if (si->value == &setup.audio_sample_rate_44100)
+    ToggleAudioSampleRateIfNeeded();
+
   // network mode may have changed at this point
   if (si->value == &setup.network_mode)
     ToggleNetworkModeIfNeeded();
diff --git a/src/tools.c b/src/tools.c
index 39976f9d..7c81b8f7 100644
--- a/src/tools.c
+++ b/src/tools.c
@@ -11431,6 +11431,27 @@ void PlaySoundSelecting(void)
 #endif
 }
 
+void ToggleAudioSampleRateIfNeeded(void)
+{
+  int setup_audio_sample_rate = (setup.audio_sample_rate_44100 ? 44100 : 22050);
+
+  // if setup and audio sample rate are already matching, nothing do do
+  if ((setup_audio_sample_rate == audio.sample_rate) ||
+      !audio.sound_available)
+    return;
+
+#if 1
+  // apparently changing the audio output sample rate does not work at runtime,
+  // so currently the program has to be restarted to apply the new sample rate
+  Request("Please restart the program to change audio sample rate!", REQ_CONFIRM);
+#else
+  SDLReopenAudio();
+
+  // set setup value according to successfully changed audio sample rate
+  setup.audio_sample_rate_44100 = (audio.sample_rate == 44100);
+#endif
+}
+
 void ToggleFullscreenIfNeeded(void)
 {
   // if setup and video fullscreen state are already matching, nothing do do
diff --git a/src/tools.h b/src/tools.h
index cc503c0a..67e0d8c5 100644
--- a/src/tools.h
+++ b/src/tools.h
@@ -304,6 +304,7 @@ void ResetFontStatus(void);
 
 void SetLevelSetInfo(char *, int);
 
+void ToggleAudioSampleRateIfNeeded(void);
 void ToggleFullscreenIfNeeded(void);
 void ChangeWindowScalingIfNeeded(void);
 void ChangeVsyncModeIfNeeded(void);