Added some SDL_Mixer calls:

- `Mix_Playing`
- `Mix_Pause`
- `Mix_Pause`
- `Mix_Resume`

2 files changed, 78 insertions, 4 deletions

diff --git a/src/library_sdl.js b/src/library_sdl.js
index e02e1e62..1cb41071 100644
--- a/src/library_sdl.js
+++ b/src/library_sdl.js
@@ -1434,10 +1434,72 @@ var LibrarySDL = {
     return (SDL.music.audio && !SDL.music.audio.paused) ? 1 : 0;
   },
 
+  // http://www.libsdl.org/projects/SDL_mixer/docs/SDL_mixer_38.html#SEC38
+  // "Note: Does not check if the channel has been paused."
+  Mix_Playing: function(id) {
+    if (id === -1)
+    {
+        var count = 0;
+        for (var i = 0; i<SDL.audios.length;i++)
+          count += SDL.Mix_Playing(i);
+        return count;
+    }
+    var info = SDL.audios[id];
+    if (info && info.audio && !info.audio.playing)
+      return 1;
+    return 0;
+  },
+  
+  Mix_Pause: function(id) {
+    if (id === -1)
+    {
+        for (var i = 0; i<SDL.audios.length;i++)
+          SDL.Mix_Pause(i);
+        return;
+    }
+    var info = SDL.audios[id];
+    if (info && info.audio)
+    {
+      console.log("paused " + id);
+      info.audio.pause();
+    }
+  },
+  
+  // http://www.libsdl.org/projects/SDL_mixer/docs/SDL_mixer_39.html#SEC39
+  Mix_Paused: function(id) {
+    if (id === -1)
+    {
+        var pausedCount = 0;
+        for (var i = 0; i<SDL.audios.length;i++)
+          pausedCount += SDL.Mix_Paused(i);
+        return pausedCount;
+    }
+    var info = SDL.audios[id];
+    if (info && info.audio && info.audio.paused)
+      return 1;
+    return 0;
+  },
+
   Mix_PausedMusic: function() {
     return (SDL.music.audio && SDL.music.audio.paused) ? 1 : 0;
   },
 
+  // http://www.libsdl.org/projects/SDL_mixer/docs/SDL_mixer_33.html#SEC33
+  Mix_Resume: function(id) {
+    if (id === -1)
+    {
+        for (var i = 0; i<SDL.audios.length;i++)
+          SDL.Mix_Resume(i);
+        return;
+    }
+    var info = SDL.audios[id];
+    if (info && info.audio)
+    {
+      console.log("resumed " + id);
+      info.audio.play();
+    }
+  },
+
   // SDL TTF
 
   TTF_Init: function() { return 0 },
diff --git a/tests/sdl_audio.c b/tests/sdl_audio.c
index 938df3c4..ce3bf5a9 100644
--- a/tests/sdl_audio.c
+++ b/tests/sdl_audio.c
@@ -6,13 +6,14 @@
 
 Mix_Chunk *sound, *sound2;
 
-void play2();
+int play2();
 
-void play() {
+int play() {
   int channel = Mix_PlayChannel(-1, sound, 1);
   assert(channel == 0);
 
   emscripten_run_script("setTimeout(Module['_play2'], 500)");
+  return channel;
 }
 
 void done(int channel) {
@@ -22,11 +23,12 @@ void done(int channel) {
   REPORT_RESULT();
 }
 
-void play2() {
+int play2() {
   Mix_ChannelFinished(done);
 
   int channel2 = Mix_PlayChannel(-1, sound2, 1);
   assert(channel2 == 1);
+  return channel2;
 }
 
 int main(int argc, char **argv) {
@@ -40,7 +42,17 @@ int main(int argc, char **argv) {
   sound2 = Mix_LoadWAV("sound2.wav");
   assert(sound);
 
-  play();
+  int channel = play();
+  printf( "Pausing Channel %d", channel );
+  Mix_Pause(channel);
+  int paused = Mix_Paused(channel);
+  printf( "Channel %d %s", channel, paused ? "is paused" : "is NOT paused" );
+  assert(paused);
+  Mix_Resume(channel);
+  paused = Mix_Paused(channel);
+  printf( "Channel %d %s", channel, paused ? "is paused" : "is NOT paused" );
+  assert(paused == 0);
+
   if (argc == 12121) play2(); // keep it alive
 
   emscripten_run_script("element = document.createElement('input');"