Medium-level API: Add support for various new functions

main/low/lib/reaper/more_reaper_plugin_functions.h

@@ -5,8 +5,8 @@
 // specifically in a hook installed by Audio_RegHardwareHook, or if in a VST/etc and IsInRealTimeAudio() returns TRUE.
 // The API:
 
-midi_Input *(*GetMidiInput)(int idx);
-midi_Output *(*GetMidiOutput)(int idx);
+midi_Input* (* GetMidiInput)(int idx);
+midi_Output* (* GetMidiOutput)(int idx);
 
 /*
     You should call the above GetMidi*put() before you use them, to verify the device is still open.
@@ -16,18 +16,48 @@ midi_Output *(*GetMidiOutput)(int idx);
 */
 
 // fxDoReaperPresetAction(parentid, "preset name",0);  // will save the preset to 'preset name'
-int (*fxDoReaperPresetAction)(void* fx, const char* name, int flag);
+// NOT USED YET
+int (* fxDoReaperPresetAction)(void* fx, const char* name, int flag);
 
 // - extra_flags can have 1 set to signify "do not refresh the toolbar/menus" -- if you do a batch of updates you'd set 1 for everything except the final one
 // - all changes do not persist. If the user customizes the menu after your change was added, then it does persist, because the user customization makes it stick.
 // - toolbarflags: &1= animate if enabled-state, &2=animate if disabled-state, &0x7f8 is the animation mode
 // - returns true on success or false on failure
-bool (*AddCustomMenuOrToolbarItem)(const char *menuname, int pos, int command_id, int toolbarflags, const char *str, const char *iconfn, int extra_flags);
+bool (* AddCustomMenuOrToolbarItem)(const char* menuname,
+    int pos,
+    int command_id,
+    int toolbarflags,
+    const char* str,
+    const char* iconfn,
+    int extra_flags);
 
 // - extra_flags can have 1 set to signify "do not refresh the toolbar/menus" -- if you do a batch of updates you'd set 1 for everything except the final one
 // - all changes do not persist. If the user customizes the menu after your change was added, then it does persist, because the user customization makes it stick.
 // - returns true on success or false on failure
-bool (*DeleteCustomMenuOrToolbarItem)(const char *menuname, int pos, int extra_flags);
+bool (* DeleteCustomMenuOrToolbarItem)(const char* menuname, int pos, int extra_flags);
 
 // - returns true on success or false on failure
-bool (*GetCustomMenuOrToolbarItem)(const char *menuname, int pos, int *commandOutOptional, int *toolbarFlagsOutOptional, const char **strOutOptional, const char **iconFnOutOptional);
+bool (* GetCustomMenuOrToolbarItem)(const char* menuname,
+    int pos,
+    int* commandOutOptional,
+    int* toolbarFlagsOutOptional,
+    const char** strOutOptional,
+    const char** iconFnOutOptional);
+
+// You can use this to step through times ahead of the current playback time, loopcnt will get updated on a loop or autoseek etc.
+//
+// double nextpos = old_pos;
+// INT64 lc = GetPlayLoopCnt(proj, NULL);
+// int ret = AdvancePlaybackPosition(proj, old_pos, &next_pos, &lc, 0.0 /* or srate */, NULL, NULL);
+// ret 1 if looped sel, 2 if looped project, 4 if loopendskip, 8 if smoothseek, 16 if fade audition (all during this block)
+// next_pos and lc updated so you can call again to look farther ahead
+int (* AdvancePlaybackPosition)(ReaProject* __proj,
+    double opos,
+    double* npos,
+    INT64* loopcnt,
+    double srate,
+    int* max_spls,
+    int* sf);
+
+// Not really sure what this does, but it should be used in combination with AdvancePlaybackPosition.
+INT64 (* GetPlayLoopCnt)(ReaProject* __proj, void* something);