Merge pull request #368 from jedgarpark/slideshows-soundtrack

slideshow for museum tour frame

Slideshows_Soundtrack/slideshows_soundtrack.py

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+import board
+from adafruit_slideshow import PlayBackOrder, SlideShow, PlayBackDirection
+import audioio
+import pulseio
+import touchio
+
+# Create the slideshow object that plays through once alphabetically.
+slideshow = SlideShow(board.DISPLAY, pulseio.PWMOut(board.TFT_BACKLIGHT), folder="/",
+                      loop=True, order=PlayBackOrder.ALPHABETICAL)
+
+# Create the touch objects on the first and last teeth
+back_button = touchio.TouchIn(board.TOUCH1)
+forward_button = touchio.TouchIn(board.TOUCH4)
+
+# Setup the speaker output
+a = audioio.AudioOut(board.SPEAKER)
+
+
+# Helper function that takes in the file name string, splits it at the period, and keeps only the
+# beginning of the string. i.e. kitten.bmp becomes kitten.
+def basename(file_name):
+    return file_name.rsplit('.', 1)[0]
+
+
+# Helper function to handle wav file playback
+def play_file(wav_file_name):
+    try:
+        data = open(wav_file_name, "rb")
+        wav = audioio.WaveFile(data)
+        a.play(wav)
+        print("Playing: " + wav_file_name)
+        while a.playing:
+            pass
+        a.stop()
+    except OSError:  # Error thrown if it finds a .bmp file with no corresponding .wav file
+        # Print the name of the .bmp file with no corresponding .wav file
+        print("No corresponding wav file:", slideshow.current_image_name)
+
+
+# Uses the basename() helper function to strip the .bmp from the file name and add .wav
+wav_file = basename(slideshow.current_image_name) + ".wav"
+# Uses the play_file() helper function to play the .wav name now saved to wav_file
+play_file(wav_file)
+
+while True:
+    # Touch the tooth on the right:
+    if forward_button.value:
+        # Sets the slideshow playback direction to forward
+        slideshow.direction = PlayBackDirection.FORWARD
+        # Advance the slideshow to the next image
+        slideshow.advance()
+        # Sets wav_file to the new corresponding .wav file
+        wav_file = basename(slideshow.current_image_name) + ".wav"
+        # Plays back the new file with the new image
+        play_file(wav_file)
+    # Touch the tooth on the left:
+    if back_button.value:
+        # Sets the slideshow playback direction to backward
+        slideshow.direction = PlayBackDirection.BACKWARD
+        # Advance to the previous image
+        slideshow.advance()
+        wav_file = basename(slideshow.current_image_name) + ".wav"
+        play_file(wav_file)