Unable to add sound for opengl renderer

[k4pran]

Description of bug / unexpected behavior

When going through cairo's tests the below one failed that was testing sound, it doesn't seem to have implemented some of cairo's logic to add sound to a movie file.

I was trying to run the following test with opengl:

def test_add_sound(using_opengl_renderer, tmpdir):
    # create sound file
    sound_loc = Path(tmpdir, "noise.wav")
    f = wave.open(str(sound_loc), "w")
    f.setparams((2, 2, 44100, 0, "NONE", "not compressed"))
    for _ in range(22050):  # half a second of sound
        packed_value = struct.pack("h", 14242)
        f.writeframes(packed_value)
        f.writeframes(packed_value)

    f.close()

    scene = Scene()
    scene.add_sound(sound_loc)

Which results in

AttributeError: 'OpenGLRenderer' object has no attribute 'time'

Expected behavior

How to reproduce the issue

Code for reproducing the problem

class Example(Scene):
    def construct(self):
        self.add_sound("path/to/soundfile")

Additional media files

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Logs

Terminal output

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System specifications

System Details

• OS (with version, e.g Windows 10 v2004 or macOS 10.15 (Catalina)):
• RAM:
• Python version (python/py/python3 --version):
• Installed modules (provide output from pip list):

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LaTeX details

• LaTeX distribution (e.g. TeX Live 2020):
• Installed LaTeX packages:

FFMPEG

Output of ffmpeg -version:

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Additional comments