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Commit 574adad

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author
tippesi
committed
Update with new postprocessor
1 parent d93b598 commit 574adad

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4 files changed

+22
-11
lines changed

4 files changed

+22
-11
lines changed

‎README.md‎

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Original file line numberDiff line numberDiff line change
@@ -1 +1,9 @@
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# Python Audio
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## What you need
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- Python 3.6.x installed (PyAudio won't work with 3.7.x)
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- PyAudio installed
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## What you get
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- Tiny framework which allows to play with audio effects
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- Easy to integratge postprocessing steps per audio stream
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## Example
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Have a look at main.py

‎audio.py‎

Lines changed: 11 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -12,6 +12,7 @@ class Audio():
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"""
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"""
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def __init__(self, filename, chunksize, paudio):
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filestream = wave.open(filename, "rb")
@@ -23,6 +24,7 @@ def __init__(self, filename, chunksize, paudio):
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self.progress = 0.0
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self.pitch = 1.0
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self.loop = False
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self.channels = filestream.getnchannels()
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self.frequency = filestream.getframerate()
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self.postprocessing = []
@@ -62,7 +64,14 @@ def __del__(self):
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self._audiostream.close()
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def update(self):
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self.progress = self.progress % float(len(self._audiodata))
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# Check if playback should be in a loop
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if self.loop:
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self.progress = self.progress % float(len(self._audiodata))
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else:
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if self.progress >= len(self._audiodata):
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return
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# Depending on the pitch we want to process a different number of samples
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readout = self.pitch * float(self._chunksize)
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index = math.floor(self.progress)
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count = math.ceil(readout)
@@ -75,12 +84,11 @@ def update(self):
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for postprocessor in self.postprocessing:
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subdata = postprocessor.apply(subdata, self.channels, self.frequency)
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# Check values are in their specified range
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# Check if values are in their specified range
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for i in range(0, len(subdata)):
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subdata[i] = max(min(subdata[i], self._maxvalue), -self._maxvalue)
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fmt = self._endianness + self._type * len(subdata)
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audiodata = struct.pack(fmt, *subdata)
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print(audiodata)
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self._audiostream.write(audiodata)
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self.progress += readout

‎main.py‎

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Original file line numberDiff line numberDiff line change
@@ -1,14 +1,14 @@
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import audio
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from audioimportAudio
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from postprocessing.volume_postprocessing import VolumePostprocessing
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from postprocessing.channel_sine_postprocessing import ChannelSinePostprocessing
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import pyaudio
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paudio = pyaudio.PyAudio()
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audio = audio.Audio("MenuTheme2_final.wav", 1024, paudio)
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audio = Audio("MenuTheme2_final.wav", 2048, paudio)
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# audio.postprocessing.append(VolumePostprocessing(1.0))
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audio.postprocessing.append(ChannelSinePostprocessing(0.1))
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audio.postprocessing.append(ChannelSinePostprocessing(0.5))
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while True:
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audio.update()

‎postprocessing/channel_sine_postprocessing.py‎

Lines changed: 0 additions & 5 deletions
Original file line numberDiff line numberDiff line change
@@ -20,15 +20,10 @@ def apply(self, data, channels, frequency):
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leftVolume = 0.5 * math.sin(deltatime) + 0.5
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rightVolume = 1.0 - leftVolume
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# print(leftVolume)
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for i in range(0, len(data)):
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"""
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if i % 2:
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data[i] = int(float(data[i]) * leftVolume)
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else:
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data[i] = int(float(data[i]) * rightVolume)
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"""
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data[i] = data[i] & 255
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return data

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