``I am trying to repeatedly play a very small sound sample (1/60th of a second) using tcod's sdl.audio module.
Since I am having trouble synchronizing the audio buffer, I decided to try the pull approach with a callback.
Here is a minimal example :
import tcod
import tcod.sdl.audio
import numpy as np
from scipy import signal
device = tcod.sdl.audio.open(callback=True)
sample_rate = device.frequency
n_samples = device.buffer_samples
duration = n_samples // sample_rate
print(device.format)
t = np.linspace(0, duration, n_samples, endpoint=False)
wave = signal.square(t * 2 * np.pi * 440).astype(device.format)
wave = device.convert(wave)
def pull_wave(device: tcod.sdl.audio.AudioDevice, stream: np.ndarray):
stream.data = wave.data
device.callback = pull_waveAnd here is the error I am getting (same as with the more complicated usage inside my application) :
Exception ignored from cffi callback <function _sdl_audio_callback at 0x00000181C7418D30>:
Traceback (most recent call last):
File "C:\Users\Splatpope\AppData\Roaming\Python\Python39\site-packages\tcod\sdl\audio.py", line 486, in _sdl_audio_callback
data: _AudioCallbackUserdata = ffi.from_handle(userdata)()
TypeError: '_AudioCallbackUserdata' object is not callable
forrtl: error (200): program aborting due to control-C event
Image PC Routine Line Source
libifcoremd.dll 00007FFF7C4BDF54 Unknown Unknown Unknown
KERNELBASE.dll 00007FFFD5A929F3 Unknown Unknown Unknown
KERNEL32.DLL 00007FFFD66E7614 Unknown Unknown Unknown
ntdll.dll 00007FFFD81E26A1 Unknown Unknown Unknown
Platform : Windows 10
Python version : 3.9.13
tcod version from pip : 15.0.1
Notes :
- I have not managed to find any examples of audio callback usage with python-tcod anywhere, so my implementation might be flawed
``I am trying to repeatedly play a very small sound sample (1/60th of a second) using tcod's sdl.audio module.
Since I am having trouble synchronizing the audio buffer, I decided to try the pull approach with a callback.
Here is a minimal example :
And here is the error I am getting (same as with the more complicated usage inside my application) :
Platform : Windows 10
Python version : 3.9.13
tcod version from pip : 15.0.1
Notes :