tr2/option: fix music resuming on volume change

Resolves #1707.

docs/tr2/CHANGELOG.md

@@ -28,6 +28,7 @@
     - removed hardcoded `0` key binding for flares
     - removed hardcoded cooldown of 15 frames for medipacks
 - changed text backend to accept named sequences (eg. "\{arrow up}" and similar)
+- changed inventory to pause the music rather than muting it (#1707)
 - improved FMV mode appearance - removed black scanlines (#1729)
 - improved FMV mode behavior - stopped switching screen resolutions (#1729)
 - improved screenshots: now saved in the screenshots/ directory with level titles and timestamps as JPG or PNG, similar to TR1X (#1773)
@@ -57,6 +58,7 @@
 - fixed a crash when firing grenades at Xian guards in statue form (#1561)
 - fixed harpoon bolts damaging inactive enemies (#1804)
 - fixed enemies that are run over by the skidoo not being counted in the statistics (#1772)
+- fixed sound settings resuming the music (#1707)
 
 ## [0.5](https://github.com/LostArtefacts/TRX/compare/afaf12a...tr2-0.5) - 2024-10-08
 - added `/sfx` command

src/tr2/game/inventory/common.c

@@ -208,7 +208,7 @@ int32_t __cdecl Inv_Display(int32_t inventory_mode)
 
     Sound_StopAllSamples();
     if (inventory_mode != INV_TITLE_MODE) {
-        Music_SetVolume(0);
+        Music_Pause();
     }
 
     switch (inventory_mode) {
@@ -765,7 +765,7 @@ int32_t __cdecl Inv_Display(int32_t inventory_mode)
 
     if (g_Inv_Chosen == NO_OBJECT) {
         if (inventory_mode != INV_TITLE_MODE && g_OptionMusicVolume != 0) {
-            Music_SetVolume(25 * g_OptionMusicVolume + 5);
+            Music_Unpause();
         }
         return 0;
     }
@@ -773,7 +773,7 @@ int32_t __cdecl Inv_Display(int32_t inventory_mode)
     switch (g_Inv_Chosen) {
     case O_PASSPORT_OPTION:
         if (g_Inv_ExtraData[0] == 1 && g_OptionMusicVolume != 0) {
-            Music_SetVolume(25 * g_OptionMusicVolume + 5);
+            Music_Unpause();
         }
         return 1;
 
@@ -801,8 +801,8 @@ int32_t __cdecl Inv_Display(int32_t inventory_mode)
         break;
     }
 
-    if (inventory_mode != INV_TITLE_MODE && g_OptionMusicVolume != 0) {
-        Music_SetVolume(25 * g_OptionMusicVolume + 5);
+    if (inventory_mode != INV_TITLE_MODE) {
+        Music_Unpause();
     }
     return 0;
 }

src/tr2/game/music.h

@@ -9,3 +9,5 @@ void __cdecl Music_Stop(void);
 bool __cdecl Music_PlaySynced(int16_t track_id);
 double __cdecl Music_GetTimestamp(void);
 void __cdecl Music_SetVolume(int32_t volume);
+void Music_Pause(void);
+void Music_Unpause(void);

src/tr2/game/music/music_main.c

@@ -179,3 +179,19 @@ void __cdecl Music_SetVolume(int32_t volume)
         Audio_Stream_SetVolume(m_AudioStreamID, m_MusicVolume);
     }
 }
+
+void Music_Pause(void)
+{
+    if (m_AudioStreamID < 0) {
+        return;
+    }
+    Audio_Stream_Pause(m_AudioStreamID);
+}
+
+void Music_Unpause(void)
+{
+    if (m_AudioStreamID < 0) {
+        return;
+    }
+    Audio_Stream_Unpause(m_AudioStreamID);
+}