Fix SDL Web Audio to work on Safari 6.0.5. That browser does not implement the AudioBufferSourceNode.start() method, but only has the older .noteOn() method, and the audio ctors don't come out as functions, but strongly typed ctor objects.

1 files changed, 9 insertions, 4 deletions

diff --git a/src/library_sdl.js b/src/library_sdl.js
index b50073be..364349b6 100644
--- a/src/library_sdl.js
+++ b/src/library_sdl.js
@@ -1746,9 +1746,9 @@ var LibrarySDL = {
         // Initialize Web Audio API if we haven't done so yet. Note: Only initialize Web Audio context ever once on the web page,
         // since initializing multiple times fails on Chrome saying 'audio resources have been exhausted'.
         if (!SDL.audioContext) {
-          if (typeof(AudioContext) === 'function') {
+          if (typeof(AudioContext) !== 'undefined') {
             SDL.audioContext = new AudioContext();
-          } else if (typeof(webkitAudioContext) === 'function') {
+          } else if (typeof(webkitAudioContext) !== 'undefined') {
             SDL.audioContext = new webkitAudioContext();
           } else {
             throw 'Web Audio API is not available!';
@@ -1791,7 +1791,12 @@ var LibrarySDL = {
             }
 #endif
             var playtime = Math.max(curtime, SDL.audio.nextPlayTime);
-            SDL.audio.soundSource[SDL.audio.nextSoundSource]['start'](playtime);
+            var ss = SDL.audio.soundSource[SDL.audio.nextSoundSource];
+            if (typeof ss['start'] !== 'undefined') {
+              ss['start'](playtime);
+            } else if (typeof ss['noteOn'] !== 'undefined') {
+              ss['noteOn'](playtime);
+            }
             var buffer_duration = sizeSamplesPerChannel / SDL.audio.freq;
             SDL.audio.nextPlayTime = playtime + buffer_duration;
             // Timer will be scheduled before the buffer completed playing.
@@ -1864,7 +1869,7 @@ var LibrarySDL = {
     } else if (!SDL.audio.timer && !SDL.audio.scriptProcessorNode) {
       // If we are using the same sampling frequency as the native sampling rate of the Web Audio graph is using, we can feed our buffers via
       // Web Audio ScriptProcessorNode, which is a pull-mode API that calls back to our code to get audio data.
-      if (SDL.audioContext !== undefined && SDL.audio.freq == SDL.audioContext['sampleRate']) {
+      if (SDL.audioContext !== undefined && SDL.audio.freq == SDL.audioContext['sampleRate'] && typeof SDL.audioContext['createScriptProcessor'] !== 'undefined') {
         var sizeSamplesPerChannel = SDL.audio.bufferSize / SDL.audio.bytesPerSample / SDL.audio.channels; // How many samples per a single channel fit in the cb buffer?
         SDL.audio.scriptProcessorNode = SDL.audioContext['createScriptProcessor'](sizeSamplesPerChannel, 0, SDL.audio.channels);
         SDL.audio.scriptProcessorNode['onaudioprocess'] = function (e) {