From 3cf70771cb45cc16ec33ffe44e7a1a4799d8f395 Mon Sep 17 00:00:00 2001 From: Jules Laplace Date: Tue, 23 Jun 2020 23:18:07 +0200 Subject: adding web app base --- animism-align/cli/commands/peaks/parse.py | 39 +++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) create mode 100644 animism-align/cli/commands/peaks/parse.py (limited to 'animism-align/cli/commands/peaks/parse.py') diff --git a/animism-align/cli/commands/peaks/parse.py b/animism-align/cli/commands/peaks/parse.py new file mode 100644 index 0000000..dc9a0a2 --- /dev/null +++ b/animism-align/cli/commands/peaks/parse.py @@ -0,0 +1,39 @@ +""" +Extract peaks from an MP3 file. +""" + +import click + +from app.site.builder import build_site, build_file + +@click.command() +@click.option('-i', '--input', 'fp_in', required=False, + help='Input file') +@click.pass_context +def cli(ctx, fp_in): + """Extract peaks from an MP3 file. + """ + import os + import math + import librosa + import numpy + import json + + from app.settings import app_cfg + + print(f"Loading {fp_in}") + y, sr = librosa.load(fp_in, sr=None) + + sr_10 = math.floor(sr / 10) + steps = math.floor(y.shape[0] / sr_10) + + peaks = numpy.ndarray(steps * 2) + + for i in range(steps): + offset = i * sr_10 + slice = y[offset:offset + sr_10] + peaks[i * 2] = float('%.3f' % slice.min()) + peaks[i * 2 + 1] = float('%.3f' % slice.max()) + + with open(os.path.join(app_cfg.DIR_DATA_STORE, 'peaks.json'), 'w') as fp_out: + json.dump(peaks.tolist(), fp_out, separators=(',', ':')) -- cgit v1.2.3-70-g09d2