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Change algorithm to detect fade point

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This commit is contained in:
Keith Edmunds 2021-08-14 23:52:31 +01:00
parent b4da349a8c
commit 427afee8da
1 changed files with 6 additions and 4 deletions
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10
app/songdb.py
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@ -168,11 +168,10 @@ def leading_silence(audio_segment, silence_threshold=Config.DBFS_SILENCE,
return min(trim_ms, len(audio_segment)) return min(trim_ms, len(audio_segment))
def fade_point(audio_segment, fade_threshold=Config.DBFS_FADE, def fade_point(audio_segment, chunk_size=Config.AUDIO_SEGMENT_CHUNK_SIZE):
chunk_size=Config.AUDIO_SEGMENT_CHUNK_SIZE):
""" """
Returns the millisecond/index of the point where the fade is down to Returns the millisecond/index of the point where the volume drops below
fade_threshold and doesn't get louder again. the maximum and doesn't get louder again.
audio_segment - the sdlg_search_database_uiegment to find silence in audio_segment - the sdlg_search_database_uiegment to find silence in
fade_threshold - the upper bound for how quiet is silent in dFBS fade_threshold - the upper bound for how quiet is silent in dFBS
chunk_size - chunk size for interating over the segment in ms chunk_size - chunk size for interating over the segment in ms
@ -182,6 +181,9 @@ def fade_point(audio_segment, fade_threshold=Config.DBFS_FADE,
segment_length = audio_segment.duration_seconds * 1000 # ms segment_length = audio_segment.duration_seconds * 1000 # ms
trim_ms = segment_length - chunk_size trim_ms = segment_length - chunk_size
max_vol = audio_segment.dBFS
fade_threshold = max_vol
while ( while (
audio_segment[trim_ms:trim_ms + chunk_size].dBFS < fade_threshold audio_segment[trim_ms:trim_ms + chunk_size].dBFS < fade_threshold
and trim_ms > 0): # noqa W503 and trim_ms > 0): # noqa W503