From 13b57d62a5b4070d91abf000bd5456d0ee00de5a Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Tue, 17 Oct 2017 22:29:19 -0700
Subject: [PATCH] Fixed bug 2909 - Mix_PauseMusic and Mix_ResumeMusic not
 working on MIDI (.mid)

Philipp Wiesemann

This is a patch to make Mix_PauseMusic() and Mix_ResumeMusic() work with the Windows native MIDI decoder.
---
 music_nativemidi.c                | 14 ++++++++++++--
 native_midi/native_midi.h         |  2 ++
 native_midi/native_midi_haiku.cpp | 11 +++++++++++
 native_midi/native_midi_mac.c     |  8 ++++++++
 native_midi/native_midi_macosx.c  |  8 ++++++++
 native_midi/native_midi_win32.c   | 14 ++++++++++++++
 6 files changed, 55 insertions(+), 2 deletions(-)

diff --git a/music_nativemidi.c b/music_nativemidi.c
index 48d05655..72c3c19c 100644
--- a/music_nativemidi.c
+++ b/music_nativemidi.c
@@ -53,6 +53,16 @@ static SDL_bool NATIVEMIDI_IsPlaying(void *context)
     return native_midi_active() ? SDL_TRUE : SDL_FALSE;
 }
 
+static void NATIVEMIDI_Pause(void *context)
+{
+    native_midi_pause();
+}
+
+static void NATIVEMIDI_Resume(void *context)
+{
+    native_midi_resume();
+}
+
 static void NATIVEMIDI_Stop(void *context)
 {
     native_midi_stop();
@@ -81,8 +91,8 @@ Mix_MusicInterface Mix_MusicInterface_NATIVEMIDI =
     NATIVEMIDI_IsPlaying,
     NULL,   /* GetAudio */
     NULL,   /* Seek */
-    NULL,   /* Pause */
-    NULL,   /* Resume */
+    NATIVEMIDI_Pause,
+    NATIVEMIDI_Resume,
     NATIVEMIDI_Stop,
     NATIVEMIDI_Delete,
     NULL,   /* Close */
diff --git a/native_midi/native_midi.h b/native_midi/native_midi.h
index 3517829a..92d25359 100644
--- a/native_midi/native_midi.h
+++ b/native_midi/native_midi.h
@@ -30,6 +30,8 @@ int native_midi_detect(void);
 NativeMidiSong *native_midi_loadsong_RW(SDL_RWops *src, int freesrc);
 void native_midi_freesong(NativeMidiSong *song);
 void native_midi_start(NativeMidiSong *song, int loops);
+void native_midi_pause(void);
+void native_midi_resume(void);
 void native_midi_stop(void);
 int native_midi_active(void);
 void native_midi_setvolume(int volume);
diff --git a/native_midi/native_midi_haiku.cpp b/native_midi/native_midi_haiku.cpp
index 65de5f5e..81b847e9 100644
--- a/native_midi/native_midi_haiku.cpp
+++ b/native_midi/native_midi_haiku.cpp
@@ -253,6 +253,7 @@ void native_midi_freesong(NativeMidiSong *song)
   delete song->store;
   delete song; song = 0;
 }
+
 void native_midi_start(NativeMidiSong *song, int loops)
 {
   native_midi_stop();
@@ -261,6 +262,15 @@ void native_midi_start(NativeMidiSong *song, int loops)
   song->store->Start();
   currentSong = song;
 }
+
+void native_midi_pause(void)
+{
+}
+
+void native_midi_resume(void)
+{
+}
+
 void native_midi_stop(void)
 {
   if (currentSong == NULL) return;
@@ -270,6 +280,7 @@ void native_midi_stop(void)
     usleep(1000);
   currentSong = NULL;
 }
+
 int native_midi_active(void)
 {
   if (currentSong == NULL) return 0;
diff --git a/native_midi/native_midi_mac.c b/native_midi/native_midi_mac.c
index a9ef6443..24a39423 100644
--- a/native_midi/native_midi_mac.c
+++ b/native_midi/native_midi_mac.c
@@ -242,6 +242,14 @@ void native_midi_start(NativeMidiSong *song, int loops)
     SDL_PauseAudio(0);
 }
 
+void native_midi_pause(void)
+{
+}
+
+void native_midi_resume(void)
+{
+}
+
 void native_midi_stop(void)
 {
     if (gTunePlayer == NULL)
diff --git a/native_midi/native_midi_macosx.c b/native_midi/native_midi_macosx.c
index 5d432d28..6ee31e0e 100644
--- a/native_midi/native_midi_macosx.c
+++ b/native_midi/native_midi_macosx.c
@@ -287,6 +287,14 @@ void native_midi_start(NativeMidiSong *song, int loops)
     SDL_PauseAudio(0);
 }
 
+void native_midi_pause(void)
+{
+}
+
+void native_midi_resume(void)
+{
+}
+
 void native_midi_stop(void)
 {
     if (currentsong) {
diff --git a/native_midi/native_midi_win32.c b/native_midi/native_midi_win32.c
index 047711d4..44bb055d 100644
--- a/native_midi/native_midi_win32.c
+++ b/native_midi/native_midi_win32.c
@@ -272,6 +272,20 @@ void native_midi_start(NativeMidiSong *song, int loops)
   }
 }
 
+void native_midi_pause(void)
+{
+  if (!hMidiStream)
+    return;
+  midiStreamPause(hMidiStream);
+}
+
+void native_midi_resume(void)
+{
+  if (!hMidiStream)
+    return;
+  midiStreamRestart(hMidiStream);
+}
+
 void native_midi_stop(void)
 {
   if (!hMidiStream)