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import dataclasses
import math
@dataclasses.dataclass
class SequenceConfig:
# general
duration: float
# audio
sampling_rate: int
spectrogram_frame_rate: int
latent_downsample_rate: int = 2
# visual
clip_frame_rate: int = 8
sync_frame_rate: int = 25
sync_num_frames_per_segment: int = 16
sync_step_size: int = 8
sync_downsample_rate: int = 2
@property
def num_audio_frames(self) -> int:
# we need an integer number of latents
return self.latent_seq_len * self.spectrogram_frame_rate * self.latent_downsample_rate
@property
def latent_seq_len(self) -> int:
return int(
math.ceil(self.duration * self.sampling_rate / self.spectrogram_frame_rate /
self.latent_downsample_rate))
@property
def clip_seq_len(self) -> int:
return int(self.duration * self.clip_frame_rate)
@property
def sync_seq_len(self) -> int:
num_frames = self.duration * self.sync_frame_rate
num_segments = (num_frames - self.sync_num_frames_per_segment) // self.sync_step_size + 1
return int(num_segments * self.sync_num_frames_per_segment / self.sync_downsample_rate)
CONFIG_16K = SequenceConfig(duration=8.0, sampling_rate=16000, spectrogram_frame_rate=256)
CONFIG_44K = SequenceConfig(duration=8.0, sampling_rate=44100, spectrogram_frame_rate=512)
if __name__ == '__main__':
assert CONFIG_16K.latent_seq_len == 250
assert CONFIG_16K.clip_seq_len == 64
assert CONFIG_16K.sync_seq_len == 192
assert CONFIG_16K.num_audio_frames == 128000
assert CONFIG_44K.latent_seq_len == 345
assert CONFIG_44K.clip_seq_len == 64
assert CONFIG_44K.sync_seq_len == 192
assert CONFIG_44K.num_audio_frames == 353280
print('Passed')
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