Merge pull request #3153 from kivy/core-audio-avplayer

core/audio: new pure-python/pyobjus AVFoundation audio player

kivy/__init__.py

@@ -186,7 +186,9 @@ kivy_options = {
     'video': (
         'gstplayer', 'ffmpeg', 'ffpyplayer', 'gi', 'pygst', 'pyglet',
         'null'),
-    'audio': ('gstplayer', 'pygame', 'gi', 'pygst', 'ffpyplayer', 'sdl2'),
+    'audio': (
+        'gstplayer', 'pygame', 'gi', 'pygst', 'ffpyplayer', 'sdl2',
+        'avplayer'),
     'image': ('tex', 'imageio', 'dds', 'gif', 'sdl2', 'pygame', 'pil', 'ffpy'),
     'camera': ('opencv', 'gi', 'pygst', 'videocapture', 'avfoundation'),
     'spelling': ('enchant', 'osxappkit', ),

kivy/core/audio/__init__.py

@@ -40,6 +40,7 @@ from kivy.compat import PY2
 from kivy.resources import resource_find
 from kivy.properties import StringProperty, NumericProperty, OptionProperty, \
     AliasProperty, BooleanProperty
+from kivy.utils import platform
 from kivy.setupconfig import USE_SDL2
 
 
@@ -193,7 +194,8 @@ class Sound(EventDispatcher):
 # Little trick here, don't activate gstreamer on window
 # seem to have lot of crackle or something...
 audio_libs = []
-
+if platform in ('macosx', 'ios'):
+    audio_libs += [('avplayer', 'audio_avplayer')]
 # from now on, prefer our gstplayer instead of gi/pygst.
 try:
     from kivy.lib.gstplayer import GstPlayer  # NOQA

kivy/core/audio/audio_avplayer.py

@@ -0,0 +1,71 @@
+'''
+AudioAvplayer: implementation of Sound using pyobjus / AVFoundation.
+Works on iOS / OSX.
+'''
+
+__all__ = ('SoundAvplayer', )
+
+from kivy.core.audio import Sound, SoundLoader
+from pyobjus import autoclass
+from pyobjus.dylib_manager import load_framework, INCLUDE
+import sys
+
+load_framework(INCLUDE.AVFoundation)
+AVAudioPlayer = autoclass("AVAudioPlayer")
+NSURL = autoclass("NSURL")
+NSString = autoclass("NSString")
+
+
+class SoundAvplayer(Sound):
+    @staticmethod
+    def extensions():
+        # taken from https://developer.apple.com/library/ios/documentation/MusicAudio/Conceptual/CoreAudioOverview/SupportedAudioFormatsMacOSX/SupportedAudioFormatsMacOSX.html
+        return ("aac", "adts", "aif", "aiff", "aifc", "caf", "mp3", "mp4",
+                "m4a", "snd", "au", "sd2", "wav")
+
+    def __init__(self, **kwargs):
+        self._avplayer = None
+        super(SoundAvplayer, self).__init__(**kwargs)
+
+    def load(self):
+        self.unload()
+        fn = NSString.alloc().initWithUTF8String_(self.filename)
+        url = NSURL.alloc().initFileURLWithPath_(fn)
+        self._avplayer = AVAudioPlayer.alloc().initWithContentsOfURL_error_(url, None)
+
+    def unload(self):
+        self.stop()
+        self._avplayer = None
+
+    def play(self):
+        if not self._avplayer:
+            return
+        self._avplayer.play()
+        super(SoundAvplayer, self).play()
+
+    def stop(self):
+        if not self._avplayer:
+            return
+        self._avplayer.stop()
+        super(SoundAvplayer, self).stop()
+
+    def seek(self, position):
+        if not self._avplayer:
+            return
+        self._avplayer.playAtTime_(float(position))
+
+    def get_pos(self):
+        if self._avplayer:
+            return self._avplayer.currentTime
+        return super(SoundAvplayer, self).get_pos()
+
+    def on_volume(self, instance, volume):
+        if self._avplayer:
+            self._avplayer.volume = float(volume)
+
+    def _get_length(self):
+        if self._avplayer:
+            return self._avplayer.duration
+        return super(SoundAvplayer, self)._get_length()
+
+SoundLoader.register(SoundAvplayer)