├── .coveragerc ├── .github ├── ISSUE_TEMPLATE │ ├── bug_report.md │ └── feature_request.md └── workflows │ ├── format.yml │ └── run_tests.yml ├── .gitignore ├── .readthedocs.yaml ├── LICENSE ├── README.md ├── docs ├── Makefile ├── build │ ├── doctrees │ │ ├── environment.pickle │ │ ├── index.doctree │ │ ├── modules.doctree │ │ └── simplestretch.doctree │ └── html │ │ ├── .buildinfo │ │ ├── _sources │ │ ├── index.rst.txt │ │ ├── modules.rst.txt │ │ └── simplestretch.rst.txt │ │ ├── _static │ │ ├── _sphinx_javascript_frameworks_compat.js │ │ ├── basic.css │ │ ├── css │ │ │ ├── badge_only.css │ │ │ ├── fonts │ │ │ │ ├── Roboto-Slab-Bold.woff │ │ │ │ ├── Roboto-Slab-Bold.woff2 │ │ │ │ ├── Roboto-Slab-Regular.woff │ │ │ │ ├── Roboto-Slab-Regular.woff2 │ │ │ │ ├── fontawesome-webfont.eot │ │ │ │ ├── fontawesome-webfont.svg │ │ │ │ ├── fontawesome-webfont.ttf │ │ │ │ ├── fontawesome-webfont.woff │ │ │ │ ├── fontawesome-webfont.woff2 │ │ │ │ ├── lato-bold-italic.woff │ │ │ │ ├── lato-bold-italic.woff2 │ │ │ │ ├── lato-bold.woff │ │ │ │ ├── lato-bold.woff2 │ │ │ │ ├── lato-normal-italic.woff │ │ │ │ ├── lato-normal-italic.woff2 │ │ │ │ ├── lato-normal.woff │ │ │ │ └── lato-normal.woff2 │ │ │ └── theme.css │ │ ├── doctools.js │ │ ├── documentation_options.js │ │ ├── file.png │ │ ├── jquery.js │ │ ├── js │ │ │ ├── badge_only.js │ │ │ ├── html5shiv-printshiv.min.js │ │ │ ├── html5shiv.min.js │ │ │ └── theme.js │ │ ├── language_data.js │ │ ├── minus.png │ │ ├── plus.png │ │ ├── pygments.css │ │ ├── searchtools.js │ │ └── sphinx_highlight.js │ │ ├── genindex.html │ │ ├── index.html │ │ ├── modules.html │ │ ├── objects.inv │ │ ├── py-modindex.html │ │ ├── search.html │ │ ├── searchindex.js │ │ └── simplestretch.html ├── make.bat ├── requirements.txt └── source │ ├── conf.py │ ├── index.rst │ ├── modules.rst │ └── simplestretch.rst ├── pyproject.toml ├── requirements.txt ├── src └── simplestretch │ ├── __init__.py │ └── cli.py └── tests ├── sample_files ├── 440hz.mp3 └── 440hz.wav ├── test_files ├── speedup_save_test.wav └── stretch_save_test.wav ├── test_speedup.py └── test_stretch.py /.coveragerc: -------------------------------------------------------------------------------- 1 | [run] 2 | relative_files = true -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/bug_report.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Bug report 3 | about: Report a bug to help improve the project 4 | title: "" 5 | labels: bug 6 | assignees: '' 7 | 8 | --- 9 | 10 | Thanks for opening an issue ❤️ 11 | 12 | Write a short description of the bug in the issue title 13 | 14 | **Describe the bug** 15 | Describe the bug in length here. 16 | 17 | **Expected behavior** 18 | Describe what you expected to happen. 19 | 20 | **Real behavior** 21 | Describe what actually happens. 22 | 23 | **To Reproduce** 24 | List the steps needed to reproduce the bug: 25 | 1. ... 26 | 2. ... 27 | etc... 28 | 29 | **Context/Environment** 30 | Write here the information about the environment in which the bug happens, such as: 31 | - Your operating system: 32 | - Your python version: 33 | 34 | **Screenshots** 35 | If applicable, add screenshots to help explain your problem. 36 | 37 | **Additional context** 38 | Add any other context about the problem that you think might be relevant. -------------------------------------------------------------------------------- /.github/ISSUE_TEMPLATE/feature_request.md: -------------------------------------------------------------------------------- 1 | --- 2 | name: Feature request 3 | about: Suggest an idea you'd like to see added to this project 4 | title: "" 5 | labels: enhancement 6 | assignees: '' 7 | --- 8 | 9 | Thanks for opening an issue ❤️ 10 | 11 | Write a short description of your feature in the issue title 12 | 13 | **Describe the feature you'd like** 14 | Describe in length the feature you'd like to see added to this project. 15 | 16 | **Is your feature request related to a problem?** 17 | If applicable, describe the problem you have when using this project, and how this feature would solve it. 18 | Ex.: It always frustrates me how... 19 | 20 | **Additional context** 21 | Add any other context or screenshots about the feature request you think might be relevant. -------------------------------------------------------------------------------- /.github/workflows/format.yml: -------------------------------------------------------------------------------- 1 | name: Format code with black 2 | 3 | on: 4 | push: 5 | branches: [ "main" ] 6 | 7 | jobs: 8 | format: 9 | name: Format code 10 | 11 | permissions: 12 | contents: write 13 | pull-requests: write 14 | 15 | uses: Mews/.github/.github/workflows/format-python.yaml@main -------------------------------------------------------------------------------- /.github/workflows/run_tests.yml: -------------------------------------------------------------------------------- 1 | name: Tests 2 | 3 | on: 4 | push: 5 | branches: [ "main" ] 6 | pull_request: 7 | branches: [ "main" ] 8 | 9 | jobs: 10 | call-run-python-tests: 11 | name: Run tests 12 | 13 | permissions: 14 | contents: write 15 | 16 | uses: Mews/.github/.github/workflows/run-python-tests.yaml@main 17 | with: 18 | tests_dir: "tests/" 19 | python_versions: '["3.10", "3.12"]' 20 | os_list: '["ubuntu-latest", "windows-latest", "macos-latest"]' 21 | create_coverage_comment: true 22 | -------------------------------------------------------------------------------- /.gitignore: -------------------------------------------------------------------------------- 1 | **/__pycache__ 2 | dist 3 | **/.coverage -------------------------------------------------------------------------------- /.readthedocs.yaml: -------------------------------------------------------------------------------- 1 | version: "2" 2 | 3 | build: 4 | os: "ubuntu-22.04" 5 | tools: 6 | python: "3.12" 7 | 8 | python: 9 | install: 10 | - 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But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | 2 | # simpleaudiostretch 3 | [![Tests badge](https://github.com/Mews/simpleaudiostretch/actions/workflows/run_tests.yml/badge.svg)](https://github.com/Mews/simpleaudiostretch/actions/workflows/run_tests.yml) 4 | [![Coverage badge](https://raw.githubusercontent.com/Mews/simpleaudiostretch/python-coverage-comment-action-data/badge.svg)](https://htmlpreview.github.io/?https://github.com/Mews/simpleaudiostretch/blob/python-coverage-comment-action-data/htmlcov/index.html) 5 | [![Documentation badge](https://readthedocs.org/projects/simpleaudiostretch/badge/?version=latest&style=flat-default)](https://simpleaudiostretch.readthedocs.io/en/latest/simplestretch.html) 6 | [![PyPI Version](https://img.shields.io/pypi/v/simpleaudiostretch?label=pypi%20package)](https://pypi.python.org/pypi/simpleaudiostretch) 7 | [![PyPI Downloads](https://img.shields.io/pypi/dm/simpleaudiostretch)](https://pypi.python.org/pypi/simpleaudiostretch) 8 | 9 | A simple python package to stretch audio files and change their speed. 10 | 11 | ## Installation 12 | 13 | You can install the package by running the command `pip install simpleaudiostretch` 14 | 15 | ## Features 16 | 17 | - Supports many different audio formats, including mp3, wav, and also raw audio data in the form of numpy ndarrays. 18 | - Its really fast, especially when working with raw audio data. 19 | ## Documentation 20 | 21 | The full documentation for this package can be found [here](https://simpleaudiostretch.readthedocs.io/en/latest/simplestretch.html). 22 | # Usage/Examples 23 | ## Python 24 | This is an example on how you might use this library\ 25 | In this example we take a file called `song.mp3` and make it twice as long: 26 | ```python 27 | import simplestretch 28 | 29 | # A factor of 2 means the song becomes twice as long 30 | simplestretch.stretch_audio("song.mp3", 2, "out.wav") 31 | ``` 32 | 33 | You might also have the raw audio data, in which case you could do the following: 34 | ```python 35 | import simplestretch, soundfile 36 | 37 | # In this example we use soundfile to get the audio data 38 | # But you can use any numpy ndarray representing audio 39 | audio_data, samplerate = soundfile.read("song.mp3") 40 | 41 | # When working with raw audio data 42 | # You will also need to pass the audio's sample rate to the function 43 | simplestretch.stretch_audio(audio_data, 2, output="out.wav", samplerate=samplerate) 44 | ``` 45 | 46 | You can also work with changes in speed rather than changes in length through the `speedup_audio` method: 47 | ```python 48 | import simplestretch 49 | 50 | # In this example we make the song twice as fast rather than twice as long 51 | simplestretch.speedup_audio("song.mp3", 2, "out.wav") 52 | ``` 53 | ## CLI 54 | 55 | You can also use the command line interface to stretch your audios, through the `simplestretch` command. 56 | 57 | ### Required Arguments 58 | 59 | | Short | Long | Description | Type | 60 | |-------|------------|-----------------------------------|--------| 61 | | `-a` | `--audio` | Path to the audio file | String | 62 | | `-f` | `--factor` | Factor for the change in audio length/speed | Float | 63 | | `-o` | `--output` | Path for the output file | String | 64 | 65 | ### Optional Arguments 66 | 67 | | Short | Long | Description | Type | 68 | |-------|-----------|------------------------------------|---------| 69 | | `-s` | `--speed` | Use this flag to target audio speed instead of length | Boolean | 70 | 71 | ### Example Commands 72 | 73 | To stretch an audio file to 1.5 times its original size and save it: 74 | 75 | ```sh 76 | simplestretch -a path/to/audio/file -f 1.5 -o path/to/output/file 77 | ``` 78 | 79 | To speed up an audio file to 2 times speed and save it: 80 | 81 | ```sh 82 | simplestretch -a path/to/audio/file -f 2 -o path/to/output/file -s 83 | ``` 84 | # Support 85 | If you have any issues using this package or would like to request features, you can [open an issue](https://github.com/Mews/simpleaudiostretch/issues/new) or contact me through [my discord!](https://discord.com/users/467268976523739157) 86 | 87 | -------------------------------------------------------------------------------- /docs/Makefile: -------------------------------------------------------------------------------- 1 | # Minimal makefile for Sphinx documentation 2 | # 3 | 4 | # You can set these variables from the command line, and also 5 | # from the environment for the first two. 6 | SPHINXOPTS ?= 7 | SPHINXBUILD ?= sphinx-build 8 | SOURCEDIR = source 9 | BUILDDIR = build 10 | 11 | # Put it first so that "make" without argument is like "make help". 12 | help: 13 | @$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O) 14 | 15 | .PHONY: help Makefile 16 | 17 | # Catch-all target: route all unknown targets to Sphinx using the new 18 | # "make mode" option. $(O) is meant as a shortcut for $(SPHINXOPTS). 19 | %: Makefile 20 | @$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O) 21 | -------------------------------------------------------------------------------- /docs/build/doctrees/environment.pickle: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Mews/simpleaudiostretch/edf6bd51b4b2edc920dc35528cb4d0fc6c2450fc/docs/build/doctrees/environment.pickle -------------------------------------------------------------------------------- /docs/build/doctrees/index.doctree: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Mews/simpleaudiostretch/edf6bd51b4b2edc920dc35528cb4d0fc6c2450fc/docs/build/doctrees/index.doctree -------------------------------------------------------------------------------- /docs/build/doctrees/modules.doctree: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Mews/simpleaudiostretch/edf6bd51b4b2edc920dc35528cb4d0fc6c2450fc/docs/build/doctrees/modules.doctree -------------------------------------------------------------------------------- /docs/build/doctrees/simplestretch.doctree: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Mews/simpleaudiostretch/edf6bd51b4b2edc920dc35528cb4d0fc6c2450fc/docs/build/doctrees/simplestretch.doctree -------------------------------------------------------------------------------- /docs/build/html/.buildinfo: -------------------------------------------------------------------------------- 1 | # Sphinx build info version 1 2 | # This file hashes the configuration used when building these files. When it is not found, a full rebuild will be done. 3 | config: 76172d5cae02ba333af5e0d496b5f6ab 4 | tags: 645f666f9bcd5a90fca523b33c5a78b7 5 | -------------------------------------------------------------------------------- /docs/build/html/_sources/index.rst.txt: -------------------------------------------------------------------------------- 1 | .. simpleaudiostretch documentation master file, created by 2 | sphinx-quickstart on Wed Jun 5 09:28:38 2024. 3 | You can adapt this file completely to your liking, but it should at least 4 | contain the root `toctree` directive. 5 | 6 | Welcome to simpleaudiostretch's documentation! 7 | ============================================== 8 | 9 | .. toctree:: 10 | :maxdepth: 2 11 | :caption: Contents: 12 | 13 | 14 | 15 | Indices and tables 16 | ================== 17 | 18 | * :ref:`genindex` 19 | * :ref:`modindex` 20 | * :ref:`search` 21 | -------------------------------------------------------------------------------- /docs/build/html/_sources/modules.rst.txt: -------------------------------------------------------------------------------- 1 | simplestretch 2 | ============= 3 | 4 | .. toctree:: 5 | :maxdepth: 4 6 | 7 | simplestretch 8 | -------------------------------------------------------------------------------- /docs/build/html/_sources/simplestretch.rst.txt: -------------------------------------------------------------------------------- 1 | simplestretch package 2 | ===================== 3 | 4 | Module contents 5 | --------------- 6 | 7 | .. automodule:: simplestretch 8 | :members: 9 | :undoc-members: 10 | :show-inheritance: 11 | -------------------------------------------------------------------------------- /docs/build/html/_static/_sphinx_javascript_frameworks_compat.js: -------------------------------------------------------------------------------- 1 | /* Compatability shim for jQuery and underscores.js. 2 | * 3 | * Copyright Sphinx contributors 4 | * Released under the two clause BSD licence 5 | */ 6 | 7 | /** 8 | * small helper function to urldecode strings 9 | * 10 | * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/decodeURIComponent#Decoding_query_parameters_from_a_URL 11 | */ 12 | jQuery.urldecode = function(x) { 13 | if (!x) { 14 | return x 15 | } 16 | return decodeURIComponent(x.replace(/\+/g, ' ')); 17 | }; 18 | 19 | /** 20 | * small helper function to urlencode strings 21 | */ 22 | jQuery.urlencode = encodeURIComponent; 23 | 24 | /** 25 | * This function returns the parsed url parameters of the 26 | * current request. 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left; 263 | } 264 | 265 | .first { 266 | margin-top: 0 !important; 267 | } 268 | 269 | p.rubric { 270 | margin-top: 30px; 271 | font-weight: bold; 272 | } 273 | 274 | img.align-left, figure.align-left, .figure.align-left, object.align-left { 275 | clear: left; 276 | float: left; 277 | margin-right: 1em; 278 | } 279 | 280 | img.align-right, figure.align-right, .figure.align-right, object.align-right { 281 | clear: right; 282 | float: right; 283 | margin-left: 1em; 284 | } 285 | 286 | img.align-center, figure.align-center, .figure.align-center, object.align-center { 287 | display: block; 288 | margin-left: auto; 289 | margin-right: auto; 290 | } 291 | 292 | img.align-default, figure.align-default, .figure.align-default { 293 | display: block; 294 | margin-left: auto; 295 | margin-right: auto; 296 | } 297 | 298 | .align-left { 299 | text-align: left; 300 | } 301 | 302 | .align-center { 303 | text-align: center; 304 | } 305 | 306 | .align-default { 307 | text-align: center; 308 | } 309 | 310 | .align-right { 311 | text-align: right; 312 | } 313 | 314 | /* -- sidebars -------------------------------------------------------------- */ 315 | 316 | div.sidebar, 317 | aside.sidebar { 318 | margin: 0 0 0.5em 1em; 319 | border: 1px solid #ddb; 320 | padding: 7px; 321 | background-color: #ffe; 322 | width: 40%; 323 | float: right; 324 | clear: right; 325 | overflow-x: auto; 326 | } 327 | 328 | p.sidebar-title { 329 | font-weight: bold; 330 | } 331 | 332 | nav.contents, 333 | aside.topic, 334 | div.admonition, div.topic, blockquote { 335 | clear: left; 336 | } 337 | 338 | /* -- topics ---------------------------------------------------------------- */ 339 | 340 | nav.contents, 341 | aside.topic, 342 | div.topic { 343 | border: 1px solid #ccc; 344 | padding: 7px; 345 | margin: 10px 0 10px 0; 346 | } 347 | 348 | p.topic-title { 349 | font-size: 1.1em; 350 | font-weight: bold; 351 | margin-top: 10px; 352 | } 353 | 354 | /* -- admonitions ----------------------------------------------------------- */ 355 | 356 | div.admonition { 357 | margin-top: 10px; 358 | margin-bottom: 10px; 359 | padding: 7px; 360 | } 361 | 362 | div.admonition dt { 363 | font-weight: bold; 364 | } 365 | 366 | p.admonition-title { 367 | margin: 0px 10px 5px 0px; 368 | font-weight: bold; 369 | } 370 | 371 | div.body p.centered { 372 | text-align: center; 373 | margin-top: 25px; 374 | } 375 | 376 | /* -- content of sidebars/topics/admonitions -------------------------------- */ 377 | 378 | div.sidebar > :last-child, 379 | aside.sidebar > :last-child, 380 | nav.contents > :last-child, 381 | aside.topic > :last-child, 382 | div.topic > :last-child, 383 | div.admonition > :last-child { 384 | margin-bottom: 0; 385 | } 386 | 387 | div.sidebar::after, 388 | aside.sidebar::after, 389 | nav.contents::after, 390 | aside.topic::after, 391 | div.topic::after, 392 | div.admonition::after, 393 | blockquote::after { 394 | display: block; 395 | content: ''; 396 | clear: both; 397 | } 398 | 399 | /* -- tables ---------------------------------------------------------------- */ 400 | 401 | table.docutils { 402 | margin-top: 10px; 403 | margin-bottom: 10px; 404 | border: 0; 405 | border-collapse: collapse; 406 | } 407 | 408 | table.align-center { 409 | margin-left: auto; 410 | margin-right: auto; 411 | } 412 | 413 | table.align-default { 414 | margin-left: auto; 415 | margin-right: auto; 416 | } 417 | 418 | table caption span.caption-number { 419 | font-style: italic; 420 | } 421 | 422 | table caption span.caption-text { 423 | } 424 | 425 | table.docutils td, table.docutils th { 426 | padding: 1px 8px 1px 5px; 427 | border-top: 0; 428 | border-left: 0; 429 | border-right: 0; 430 | border-bottom: 1px solid #aaa; 431 | } 432 | 433 | th { 434 | text-align: left; 435 | padding-right: 5px; 436 | } 437 | 438 | table.citation { 439 | border-left: solid 1px gray; 440 | margin-left: 1px; 441 | } 442 | 443 | table.citation td { 444 | border-bottom: none; 445 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493 | -moz-hyphens: manual; 494 | -ms-hyphens: manual; 495 | -webkit-hyphens: manual; 496 | hyphens: manual; 497 | } 498 | 499 | /* -- hlist styles ---------------------------------------------------------- */ 500 | 501 | table.hlist { 502 | margin: 1em 0; 503 | } 504 | 505 | table.hlist td { 506 | vertical-align: top; 507 | } 508 | 509 | /* -- object description styles --------------------------------------------- */ 510 | 511 | .sig { 512 | font-family: 'Consolas', 'Menlo', 'DejaVu Sans Mono', 'Bitstream Vera Sans Mono', monospace; 513 | } 514 | 515 | .sig-name, code.descname { 516 | background-color: transparent; 517 | font-weight: bold; 518 | } 519 | 520 | .sig-name { 521 | font-size: 1.1em; 522 | } 523 | 524 | code.descname { 525 | font-size: 1.2em; 526 | } 527 | 528 | .sig-prename, code.descclassname { 529 | background-color: transparent; 530 | } 531 | 532 | .optional { 533 | font-size: 1.3em; 534 | } 535 | 536 | .sig-paren { 537 | font-size: larger; 538 | } 539 | 540 | 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2007-2023 by the Sphinx team, see AUTHORS. 8 | * :license: BSD, see LICENSE for details. 9 | * 10 | */ 11 | "use strict"; 12 | 13 | const BLACKLISTED_KEY_CONTROL_ELEMENTS = new Set([ 14 | "TEXTAREA", 15 | "INPUT", 16 | "SELECT", 17 | "BUTTON", 18 | ]); 19 | 20 | const _ready = (callback) => { 21 | if (document.readyState !== "loading") { 22 | callback(); 23 | } else { 24 | document.addEventListener("DOMContentLoaded", callback); 25 | } 26 | }; 27 | 28 | /** 29 | * Small JavaScript module for the documentation. 30 | */ 31 | const Documentation = { 32 | init: () => { 33 | Documentation.initDomainIndexTable(); 34 | Documentation.initOnKeyListeners(); 35 | }, 36 | 37 | /** 38 | * i18n support 39 | */ 40 | TRANSLATIONS: {}, 41 | PLURAL_EXPR: (n) => (n === 1 ? 0 : 1), 42 | LOCALE: "unknown", 43 | 44 | // gettext and ngettext don't access this so that the functions 45 | // can safely bound to a different name (_ = Documentation.gettext) 46 | gettext: (string) => { 47 | const translated = Documentation.TRANSLATIONS[string]; 48 | switch (typeof translated) { 49 | case "undefined": 50 | return string; // no translation 51 | case "string": 52 | return translated; // translation exists 53 | default: 54 | return translated[0]; // (singular, plural) translation tuple exists 55 | } 56 | }, 57 | 58 | ngettext: (singular, plural, n) => { 59 | const translated = Documentation.TRANSLATIONS[singular]; 60 | if (typeof translated !== "undefined") 61 | return translated[Documentation.PLURAL_EXPR(n)]; 62 | return n === 1 ? singular : plural; 63 | }, 64 | 65 | addTranslations: (catalog) => { 66 | Object.assign(Documentation.TRANSLATIONS, catalog.messages); 67 | Documentation.PLURAL_EXPR = new Function( 68 | "n", 69 | `return (${catalog.plural_expr})` 70 | ); 71 | Documentation.LOCALE = catalog.locale; 72 | }, 73 | 74 | /** 75 | * helper function to focus on search bar 76 | */ 77 | focusSearchBar: () => { 78 | document.querySelectorAll("input[name=q]")[0]?.focus(); 79 | }, 80 | 81 | /** 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109 | if (re2.test(stem)) { 110 | w = stem; 111 | re2 = /(at|bl|iz)$/; 112 | re3 = new RegExp("([^aeiouylsz])\\1$"); 113 | re4 = new RegExp("^" + C + v + "[^aeiouwxy]$"); 114 | if (re2.test(w)) 115 | w = w + "e"; 116 | else if (re3.test(w)) { 117 | re = /.$/; 118 | w = w.replace(re,""); 119 | } 120 | else if (re4.test(w)) 121 | w = w + "e"; 122 | } 123 | } 124 | 125 | // Step 1c 126 | re = /^(.+?)y$/; 127 | if (re.test(w)) { 128 | var fp = re.exec(w); 129 | stem = fp[1]; 130 | re = new RegExp(s_v); 131 | if (re.test(stem)) 132 | w = stem + "i"; 133 | } 134 | 135 | // Step 2 136 | re = /^(.+?)(ational|tional|enci|anci|izer|bli|alli|entli|eli|ousli|ization|ation|ator|alism|iveness|fulness|ousness|aliti|iviti|biliti|logi)$/; 137 | if (re.test(w)) { 138 | var fp = re.exec(w); 139 | stem = fp[1]; 140 | suffix = fp[2]; 141 | re = new RegExp(mgr0); 142 | if (re.test(stem)) 143 | w = stem + step2list[suffix]; 144 | } 145 | 146 | // Step 3 147 | re = /^(.+?)(icate|ative|alize|iciti|ical|ful|ness)$/; 148 | if (re.test(w)) { 149 | var fp = re.exec(w); 150 | stem = fp[1]; 151 | suffix = fp[2]; 152 | re = new RegExp(mgr0); 153 | if (re.test(stem)) 154 | w = stem + step3list[suffix]; 155 | } 156 | 157 | // Step 4 158 | re = /^(.+?)(al|ance|ence|er|ic|able|ible|ant|ement|ment|ent|ou|ism|ate|iti|ous|ive|ize)$/; 159 | re2 = /^(.+?)(s|t)(ion)$/; 160 | if (re.test(w)) { 161 | var fp = re.exec(w); 162 | stem = fp[1]; 163 | re = new RegExp(mgr1); 164 | if (re.test(stem)) 165 | w = stem; 166 | } 167 | else if (re2.test(w)) { 168 | var fp = re2.exec(w); 169 | stem = fp[1] + fp[2]; 170 | re2 = new RegExp(mgr1); 171 | if (re2.test(stem)) 172 | w = stem; 173 | } 174 | 175 | // Step 5 176 | re = /^(.+?)e$/; 177 | if (re.test(w)) { 178 | var fp = re.exec(w); 179 | stem = fp[1]; 180 | re = new RegExp(mgr1); 181 | re2 = new RegExp(meq1); 182 | re3 = new RegExp("^" + C + v + "[^aeiouwxy]$"); 183 | if (re.test(stem) || (re2.test(stem) && !(re3.test(stem)))) 184 | w = stem; 185 | } 186 | re = /ll$/; 187 | re2 = new RegExp(mgr1); 188 | if (re.test(w) && re2.test(w)) { 189 | re = /.$/; 190 | w = w.replace(re,""); 191 | } 192 | 193 | // and turn initial Y back to y 194 | if (firstch == "y") 195 | w = firstch.toLowerCase() + w.substr(1); 196 | return w; 197 | } 198 | } 199 | 200 | -------------------------------------------------------------------------------- /docs/build/html/_static/minus.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Mews/simpleaudiostretch/edf6bd51b4b2edc920dc35528cb4d0fc6c2450fc/docs/build/html/_static/minus.png -------------------------------------------------------------------------------- /docs/build/html/_static/plus.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Mews/simpleaudiostretch/edf6bd51b4b2edc920dc35528cb4d0fc6c2450fc/docs/build/html/_static/plus.png -------------------------------------------------------------------------------- /docs/build/html/_static/pygments.css: -------------------------------------------------------------------------------- 1 | pre { line-height: 125%; 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12 | 13 | /** 14 | * Simple result scoring code. 15 | */ 16 | if (typeof Scorer === "undefined") { 17 | var Scorer = { 18 | // Implement the following function to further tweak the score for each result 19 | // The function takes a result array [docname, title, anchor, descr, score, filename] 20 | // and returns the new score. 21 | /* 22 | score: result => { 23 | const [docname, title, anchor, descr, score, filename] = result 24 | return score 25 | }, 26 | */ 27 | 28 | // query matches the full name of an object 29 | objNameMatch: 11, 30 | // or matches in the last dotted part of the object name 31 | objPartialMatch: 6, 32 | // Additive scores depending on the priority of the object 33 | objPrio: { 34 | 0: 15, // used to be importantResults 35 | 1: 5, // used to be objectResults 36 | 2: -5, // used to be unimportantResults 37 | }, 38 | // Used when the priority is not in the mapping. 39 | objPrioDefault: 0, 40 | 41 | // query found in title 42 | title: 15, 43 | partialTitle: 7, 44 | // query found in terms 45 | term: 5, 46 | partialTerm: 2, 47 | }; 48 | } 49 | 50 | const _removeChildren = (element) => { 51 | while (element && element.lastChild) element.removeChild(element.lastChild); 52 | }; 53 | 54 | /** 55 | * See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions#escaping 56 | */ 57 | const _escapeRegExp = (string) => 58 | string.replace(/[.*+\-?^${}()|[\]\\]/g, "\\$&"); // $& means the whole matched string 59 | 60 | const _displayItem = (item, searchTerms, highlightTerms) => { 61 | const docBuilder = DOCUMENTATION_OPTIONS.BUILDER; 62 | const docFileSuffix = DOCUMENTATION_OPTIONS.FILE_SUFFIX; 63 | const docLinkSuffix = DOCUMENTATION_OPTIONS.LINK_SUFFIX; 64 | const showSearchSummary = DOCUMENTATION_OPTIONS.SHOW_SEARCH_SUMMARY; 65 | const contentRoot = document.documentElement.dataset.content_root; 66 | 67 | const [docName, title, anchor, descr, score, _filename] = item; 68 | 69 | let listItem = document.createElement("li"); 70 | let requestUrl; 71 | let linkUrl; 72 | if (docBuilder === "dirhtml") { 73 | // dirhtml builder 74 | let dirname = docName + "/"; 75 | if (dirname.match(/\/index\/$/)) 76 | dirname = dirname.substring(0, dirname.length - 6); 77 | else if (dirname === "index/") dirname = ""; 78 | requestUrl = contentRoot + dirname; 79 | linkUrl = requestUrl; 80 | } else { 81 | // normal html builders 82 | requestUrl = contentRoot + docName + docFileSuffix; 83 | linkUrl = docName + docLinkSuffix; 84 | } 85 | let linkEl = listItem.appendChild(document.createElement("a")); 86 | linkEl.href = linkUrl + anchor; 87 | linkEl.dataset.score = score; 88 | linkEl.innerHTML = title; 89 | if (descr) { 90 | listItem.appendChild(document.createElement("span")).innerHTML = 91 | " (" + descr + ")"; 92 | // highlight search terms in the description 93 | if (SPHINX_HIGHLIGHT_ENABLED) // set in sphinx_highlight.js 94 | highlightTerms.forEach((term) => _highlightText(listItem, term, "highlighted")); 95 | } 96 | else if (showSearchSummary) 97 | fetch(requestUrl) 98 | .then((responseData) => responseData.text()) 99 | .then((data) => { 100 | if (data) 101 | listItem.appendChild( 102 | Search.makeSearchSummary(data, searchTerms) 103 | ); 104 | // highlight search terms in the summary 105 | if (SPHINX_HIGHLIGHT_ENABLED) // set in sphinx_highlight.js 106 | highlightTerms.forEach((term) => _highlightText(listItem, term, "highlighted")); 107 | }); 108 | Search.output.appendChild(listItem); 109 | }; 110 | const _finishSearch = (resultCount) => { 111 | Search.stopPulse(); 112 | Search.title.innerText = _("Search Results"); 113 | if (!resultCount) 114 | Search.status.innerText = Documentation.gettext( 115 | "Your search did not match any documents. Please make sure that all words are spelled correctly and that you've selected enough categories." 116 | ); 117 | else 118 | Search.status.innerText = _( 119 | `Search finished, found ${resultCount} page(s) matching the search query.` 120 | ); 121 | }; 122 | const _displayNextItem = ( 123 | results, 124 | resultCount, 125 | searchTerms, 126 | highlightTerms, 127 | ) => { 128 | // results left, load the summary and display it 129 | // this is intended to be dynamic (don't sub resultsCount) 130 | if (results.length) { 131 | _displayItem(results.pop(), searchTerms, highlightTerms); 132 | setTimeout( 133 | () => _displayNextItem(results, resultCount, searchTerms, highlightTerms), 134 | 5 135 | ); 136 | } 137 | // search finished, update title and status message 138 | else _finishSearch(resultCount); 139 | }; 140 | 141 | /** 142 | * Default splitQuery function. Can be overridden in ``sphinx.search`` with a 143 | * custom function per language. 144 | * 145 | * The regular expression works by splitting the string on consecutive characters 146 | * that are not Unicode letters, numbers, underscores, or emoji characters. 147 | * This is the same as ``\W+`` in Python, preserving the surrogate pair area. 148 | */ 149 | if (typeof splitQuery === "undefined") { 150 | var splitQuery = (query) => query 151 | .split(/[^\p{Letter}\p{Number}_\p{Emoji_Presentation}]+/gu) 152 | .filter(term => term) // remove remaining empty strings 153 | } 154 | 155 | /** 156 | * Search Module 157 | */ 158 | const Search = { 159 | _index: null, 160 | _queued_query: null, 161 | _pulse_status: -1, 162 | 163 | htmlToText: (htmlString) => { 164 | const htmlElement = new DOMParser().parseFromString(htmlString, 'text/html'); 165 | htmlElement.querySelectorAll(".headerlink").forEach((el) => { el.remove() }); 166 | const docContent = htmlElement.querySelector('[role="main"]'); 167 | if (docContent !== undefined) return docContent.textContent; 168 | console.warn( 169 | "Content block not found. Sphinx search tries to obtain it via '[role=main]'. Could you check your theme or template." 170 | ); 171 | return ""; 172 | }, 173 | 174 | init: () => { 175 | const query = new URLSearchParams(window.location.search).get("q"); 176 | document 177 | .querySelectorAll('input[name="q"]') 178 | .forEach((el) => (el.value = query)); 179 | if (query) Search.performSearch(query); 180 | }, 181 | 182 | loadIndex: (url) => 183 | (document.body.appendChild(document.createElement("script")).src = url), 184 | 185 | setIndex: (index) => { 186 | Search._index = index; 187 | if (Search._queued_query !== null) { 188 | const query = Search._queued_query; 189 | Search._queued_query = null; 190 | Search.query(query); 191 | } 192 | }, 193 | 194 | hasIndex: () => Search._index !== null, 195 | 196 | deferQuery: (query) => (Search._queued_query = query), 197 | 198 | stopPulse: () => (Search._pulse_status = -1), 199 | 200 | startPulse: () => { 201 | if (Search._pulse_status >= 0) return; 202 | 203 | const pulse = () => { 204 | Search._pulse_status = (Search._pulse_status + 1) % 4; 205 | Search.dots.innerText = ".".repeat(Search._pulse_status); 206 | if (Search._pulse_status >= 0) window.setTimeout(pulse, 500); 207 | }; 208 | pulse(); 209 | }, 210 | 211 | /** 212 | * perform a search for something (or wait until index is loaded) 213 | */ 214 | performSearch: (query) => { 215 | // create the required interface elements 216 | const searchText = document.createElement("h2"); 217 | searchText.textContent = _("Searching"); 218 | const searchSummary = document.createElement("p"); 219 | searchSummary.classList.add("search-summary"); 220 | searchSummary.innerText = ""; 221 | const searchList = document.createElement("ul"); 222 | searchList.classList.add("search"); 223 | 224 | const out = document.getElementById("search-results"); 225 | Search.title = out.appendChild(searchText); 226 | Search.dots = Search.title.appendChild(document.createElement("span")); 227 | Search.status = out.appendChild(searchSummary); 228 | Search.output = out.appendChild(searchList); 229 | 230 | const searchProgress = document.getElementById("search-progress"); 231 | // Some themes don't use the search progress node 232 | if (searchProgress) { 233 | searchProgress.innerText = _("Preparing search..."); 234 | } 235 | Search.startPulse(); 236 | 237 | // index already loaded, the browser was quick! 238 | if (Search.hasIndex()) Search.query(query); 239 | else Search.deferQuery(query); 240 | }, 241 | 242 | /** 243 | * execute search (requires search index to be loaded) 244 | */ 245 | query: (query) => { 246 | const filenames = Search._index.filenames; 247 | const docNames = Search._index.docnames; 248 | const titles = Search._index.titles; 249 | const allTitles = Search._index.alltitles; 250 | const indexEntries = Search._index.indexentries; 251 | 252 | // stem the search terms and add them to the correct list 253 | const stemmer = new Stemmer(); 254 | const searchTerms = new Set(); 255 | const excludedTerms = new Set(); 256 | const highlightTerms = new Set(); 257 | const objectTerms = new Set(splitQuery(query.toLowerCase().trim())); 258 | splitQuery(query.trim()).forEach((queryTerm) => { 259 | const queryTermLower = queryTerm.toLowerCase(); 260 | 261 | // maybe skip this "word" 262 | // stopwords array is from language_data.js 263 | if ( 264 | stopwords.indexOf(queryTermLower) !== -1 || 265 | queryTerm.match(/^\d+$/) 266 | ) 267 | return; 268 | 269 | // stem the word 270 | let word = stemmer.stemWord(queryTermLower); 271 | // select the correct list 272 | if (word[0] === "-") excludedTerms.add(word.substr(1)); 273 | else { 274 | searchTerms.add(word); 275 | highlightTerms.add(queryTermLower); 276 | } 277 | }); 278 | 279 | if (SPHINX_HIGHLIGHT_ENABLED) { // set in sphinx_highlight.js 280 | localStorage.setItem("sphinx_highlight_terms", [...highlightTerms].join(" ")) 281 | } 282 | 283 | // console.debug("SEARCH: searching for:"); 284 | // console.info("required: ", [...searchTerms]); 285 | // console.info("excluded: ", [...excludedTerms]); 286 | 287 | // array of [docname, title, anchor, descr, score, filename] 288 | let results = []; 289 | _removeChildren(document.getElementById("search-progress")); 290 | 291 | const queryLower = query.toLowerCase(); 292 | for (const [title, foundTitles] of Object.entries(allTitles)) { 293 | if (title.toLowerCase().includes(queryLower) && (queryLower.length >= title.length/2)) { 294 | for (const [file, id] of foundTitles) { 295 | let score = Math.round(100 * queryLower.length / title.length) 296 | results.push([ 297 | docNames[file], 298 | titles[file] !== title ? `${titles[file]} > ${title}` : title, 299 | id !== null ? "#" + id : "", 300 | null, 301 | score, 302 | filenames[file], 303 | ]); 304 | } 305 | } 306 | } 307 | 308 | // search for explicit entries in index directives 309 | for (const [entry, foundEntries] of Object.entries(indexEntries)) { 310 | if (entry.includes(queryLower) && (queryLower.length >= entry.length/2)) { 311 | for (const [file, id] of foundEntries) { 312 | let score = Math.round(100 * queryLower.length / entry.length) 313 | results.push([ 314 | docNames[file], 315 | titles[file], 316 | id ? "#" + id : "", 317 | null, 318 | score, 319 | filenames[file], 320 | ]); 321 | } 322 | } 323 | } 324 | 325 | // lookup as object 326 | objectTerms.forEach((term) => 327 | results.push(...Search.performObjectSearch(term, objectTerms)) 328 | ); 329 | 330 | // lookup as search terms in fulltext 331 | results.push(...Search.performTermsSearch(searchTerms, excludedTerms)); 332 | 333 | // let the scorer override scores with a custom scoring function 334 | if (Scorer.score) results.forEach((item) => (item[4] = Scorer.score(item))); 335 | 336 | // now sort the results by score (in opposite order of appearance, since the 337 | // display function below uses pop() to retrieve items) and then 338 | // alphabetically 339 | results.sort((a, b) => { 340 | const leftScore = a[4]; 341 | const rightScore = b[4]; 342 | if (leftScore === rightScore) { 343 | // same score: sort alphabetically 344 | const leftTitle = a[1].toLowerCase(); 345 | const rightTitle = b[1].toLowerCase(); 346 | if (leftTitle === rightTitle) return 0; 347 | return leftTitle > rightTitle ? -1 : 1; // inverted is intentional 348 | } 349 | return leftScore > rightScore ? 1 : -1; 350 | }); 351 | 352 | // remove duplicate search results 353 | // note the reversing of results, so that in the case of duplicates, the highest-scoring entry is kept 354 | let seen = new Set(); 355 | results = results.reverse().reduce((acc, result) => { 356 | let resultStr = result.slice(0, 4).concat([result[5]]).map(v => String(v)).join(','); 357 | if (!seen.has(resultStr)) { 358 | acc.push(result); 359 | seen.add(resultStr); 360 | } 361 | return acc; 362 | }, []); 363 | 364 | results = results.reverse(); 365 | 366 | // for debugging 367 | //Search.lastresults = results.slice(); // a copy 368 | // console.info("search results:", Search.lastresults); 369 | 370 | // print the results 371 | _displayNextItem(results, results.length, searchTerms, highlightTerms); 372 | }, 373 | 374 | /** 375 | * search for object names 376 | */ 377 | performObjectSearch: (object, objectTerms) => { 378 | const filenames = Search._index.filenames; 379 | const docNames = Search._index.docnames; 380 | const objects = Search._index.objects; 381 | const objNames = Search._index.objnames; 382 | const titles = Search._index.titles; 383 | 384 | const results = []; 385 | 386 | const objectSearchCallback = (prefix, match) => { 387 | const name = match[4] 388 | const fullname = (prefix ? prefix + "." : "") + name; 389 | const fullnameLower = fullname.toLowerCase(); 390 | if (fullnameLower.indexOf(object) < 0) return; 391 | 392 | let score = 0; 393 | const parts = fullnameLower.split("."); 394 | 395 | // check for different match types: exact matches of full name or 396 | // "last name" (i.e. last dotted part) 397 | if (fullnameLower === object || parts.slice(-1)[0] === object) 398 | score += Scorer.objNameMatch; 399 | else if (parts.slice(-1)[0].indexOf(object) > -1) 400 | score += Scorer.objPartialMatch; // matches in last name 401 | 402 | const objName = objNames[match[1]][2]; 403 | const title = titles[match[0]]; 404 | 405 | // If more than one term searched for, we require other words to be 406 | // found in the name/title/description 407 | const otherTerms = new Set(objectTerms); 408 | otherTerms.delete(object); 409 | if (otherTerms.size > 0) { 410 | const haystack = `${prefix} ${name} ${objName} ${title}`.toLowerCase(); 411 | if ( 412 | [...otherTerms].some((otherTerm) => haystack.indexOf(otherTerm) < 0) 413 | ) 414 | return; 415 | } 416 | 417 | let anchor = match[3]; 418 | if (anchor === "") anchor = fullname; 419 | else if (anchor === "-") anchor = objNames[match[1]][1] + "-" + fullname; 420 | 421 | const descr = objName + _(", in ") + title; 422 | 423 | // add custom score for some objects according to scorer 424 | if (Scorer.objPrio.hasOwnProperty(match[2])) 425 | score += Scorer.objPrio[match[2]]; 426 | else score += Scorer.objPrioDefault; 427 | 428 | results.push([ 429 | docNames[match[0]], 430 | fullname, 431 | "#" + anchor, 432 | descr, 433 | score, 434 | filenames[match[0]], 435 | ]); 436 | }; 437 | Object.keys(objects).forEach((prefix) => 438 | objects[prefix].forEach((array) => 439 | objectSearchCallback(prefix, array) 440 | ) 441 | ); 442 | return results; 443 | }, 444 | 445 | /** 446 | * search for full-text terms in the index 447 | */ 448 | performTermsSearch: (searchTerms, excludedTerms) => { 449 | // prepare search 450 | const terms = Search._index.terms; 451 | const titleTerms = Search._index.titleterms; 452 | const filenames = Search._index.filenames; 453 | const docNames = Search._index.docnames; 454 | const titles = Search._index.titles; 455 | 456 | const scoreMap = new Map(); 457 | const fileMap = new Map(); 458 | 459 | // perform the search on the required terms 460 | searchTerms.forEach((word) => { 461 | const files = []; 462 | const arr = [ 463 | { files: terms[word], score: Scorer.term }, 464 | { files: titleTerms[word], score: Scorer.title }, 465 | ]; 466 | // add support for partial matches 467 | if (word.length > 2) { 468 | const escapedWord = _escapeRegExp(word); 469 | Object.keys(terms).forEach((term) => { 470 | if (term.match(escapedWord) && !terms[word]) 471 | arr.push({ files: terms[term], score: Scorer.partialTerm }); 472 | }); 473 | Object.keys(titleTerms).forEach((term) => { 474 | if (term.match(escapedWord) && !titleTerms[word]) 475 | arr.push({ files: titleTerms[word], score: Scorer.partialTitle }); 476 | }); 477 | } 478 | 479 | // no match but word was a required one 480 | if (arr.every((record) => record.files === undefined)) return; 481 | 482 | // found search word in contents 483 | arr.forEach((record) => { 484 | if (record.files === undefined) return; 485 | 486 | let recordFiles = record.files; 487 | if (recordFiles.length === undefined) recordFiles = [recordFiles]; 488 | files.push(...recordFiles); 489 | 490 | // set score for the word in each file 491 | recordFiles.forEach((file) => { 492 | if (!scoreMap.has(file)) scoreMap.set(file, {}); 493 | scoreMap.get(file)[word] = record.score; 494 | }); 495 | }); 496 | 497 | // create the mapping 498 | files.forEach((file) => { 499 | if (fileMap.has(file) && fileMap.get(file).indexOf(word) === -1) 500 | fileMap.get(file).push(word); 501 | else fileMap.set(file, [word]); 502 | }); 503 | }); 504 | 505 | // now check if the files don't contain excluded terms 506 | const results = []; 507 | for (const [file, wordList] of fileMap) { 508 | // check if all requirements are matched 509 | 510 | // as search terms with length < 3 are discarded 511 | const filteredTermCount = [...searchTerms].filter( 512 | (term) => term.length > 2 513 | ).length; 514 | if ( 515 | wordList.length !== searchTerms.size && 516 | wordList.length !== filteredTermCount 517 | ) 518 | continue; 519 | 520 | // ensure that none of the excluded terms is in the search result 521 | if ( 522 | [...excludedTerms].some( 523 | (term) => 524 | terms[term] === file || 525 | titleTerms[term] === file || 526 | (terms[term] || []).includes(file) || 527 | (titleTerms[term] || []).includes(file) 528 | ) 529 | ) 530 | break; 531 | 532 | // select one (max) score for the file. 533 | const score = Math.max(...wordList.map((w) => scoreMap.get(file)[w])); 534 | // add result to the result list 535 | results.push([ 536 | docNames[file], 537 | titles[file], 538 | "", 539 | null, 540 | score, 541 | filenames[file], 542 | ]); 543 | } 544 | return results; 545 | }, 546 | 547 | /** 548 | * helper function to return a node containing the 549 | * search summary for a given text. keywords is a list 550 | * of stemmed words. 551 | */ 552 | makeSearchSummary: (htmlText, keywords) => { 553 | const text = Search.htmlToText(htmlText); 554 | if (text === "") return null; 555 | 556 | const textLower = text.toLowerCase(); 557 | const actualStartPosition = [...keywords] 558 | .map((k) => textLower.indexOf(k.toLowerCase())) 559 | .filter((i) => i > -1) 560 | .slice(-1)[0]; 561 | const startWithContext = Math.max(actualStartPosition - 120, 0); 562 | 563 | const top = startWithContext === 0 ? "" : "..."; 564 | const tail = startWithContext + 240 < text.length ? "..." : ""; 565 | 566 | let summary = document.createElement("p"); 567 | summary.classList.add("context"); 568 | summary.textContent = top + text.substr(startWithContext, 240).trim() + tail; 569 | 570 | return summary; 571 | }, 572 | }; 573 | 574 | _ready(Search.init); 575 | -------------------------------------------------------------------------------- /docs/build/html/_static/sphinx_highlight.js: -------------------------------------------------------------------------------- 1 | /* Highlighting utilities for Sphinx HTML documentation. */ 2 | "use strict"; 3 | 4 | const SPHINX_HIGHLIGHT_ENABLED = true 5 | 6 | /** 7 | * highlight a given string on a node by wrapping it in 8 | * span elements with the given class name. 9 | */ 10 | const _highlight = (node, addItems, text, className) => { 11 | if (node.nodeType === Node.TEXT_NODE) { 12 | const val = node.nodeValue; 13 | const parent = node.parentNode; 14 | const pos = val.toLowerCase().indexOf(text); 15 | if ( 16 | pos >= 0 && 17 | !parent.classList.contains(className) && 18 | !parent.classList.contains("nohighlight") 19 | ) { 20 | let span; 21 | 22 | const closestNode = parent.closest("body, svg, foreignObject"); 23 | const isInSVG = closestNode && closestNode.matches("svg"); 24 | if (isInSVG) { 25 | span = document.createElementNS("http://www.w3.org/2000/svg", "tspan"); 26 | } else { 27 | span = document.createElement("span"); 28 | span.classList.add(className); 29 | } 30 | 31 | span.appendChild(document.createTextNode(val.substr(pos, text.length))); 32 | const rest = document.createTextNode(val.substr(pos + text.length)); 33 | parent.insertBefore( 34 | span, 35 | parent.insertBefore( 36 | rest, 37 | node.nextSibling 38 | ) 39 | ); 40 | node.nodeValue = val.substr(0, pos); 41 | /* There may be more occurrences of search term in this node. So call this 42 | * function recursively on the remaining fragment. 43 | */ 44 | _highlight(rest, addItems, text, className); 45 | 46 | if (isInSVG) { 47 | const rect = document.createElementNS( 48 | "http://www.w3.org/2000/svg", 49 | "rect" 50 | ); 51 | const bbox = parent.getBBox(); 52 | rect.x.baseVal.value = bbox.x; 53 | rect.y.baseVal.value = bbox.y; 54 | rect.width.baseVal.value = bbox.width; 55 | rect.height.baseVal.value = bbox.height; 56 | rect.setAttribute("class", className); 57 | addItems.push({ parent: parent, target: rect }); 58 | } 59 | } 60 | } else if (node.matches && !node.matches("button, select, textarea")) { 61 | node.childNodes.forEach((el) => _highlight(el, addItems, text, className)); 62 | } 63 | }; 64 | const _highlightText = (thisNode, text, className) => { 65 | let addItems = []; 66 | _highlight(thisNode, addItems, text, className); 67 | addItems.forEach((obj) => 68 | obj.parent.insertAdjacentElement("beforebegin", obj.target) 69 | ); 70 | }; 71 | 72 | /** 73 | * Small JavaScript module for the documentation. 74 | */ 75 | const SphinxHighlight = { 76 | 77 | /** 78 | * highlight the search words provided in localstorage in the text 79 | */ 80 | highlightSearchWords: () => { 81 | if (!SPHINX_HIGHLIGHT_ENABLED) return; // bail if no highlight 82 | 83 | // get and clear terms from localstorage 84 | const url = new URL(window.location); 85 | const highlight = 86 | localStorage.getItem("sphinx_highlight_terms") 87 | || url.searchParams.get("highlight") 88 | || ""; 89 | localStorage.removeItem("sphinx_highlight_terms") 90 | url.searchParams.delete("highlight"); 91 | window.history.replaceState({}, "", url); 92 | 93 | // get individual terms from highlight string 94 | const terms = highlight.toLowerCase().split(/\s+/).filter(x => x); 95 | if (terms.length === 0) return; // nothing to do 96 | 97 | // There should never be more than one element matching "div.body" 98 | const divBody = document.querySelectorAll("div.body"); 99 | const body = divBody.length ? divBody[0] : document.querySelector("body"); 100 | window.setTimeout(() => { 101 | terms.forEach((term) => _highlightText(body, term, "highlighted")); 102 | }, 10); 103 | 104 | const searchBox = document.getElementById("searchbox"); 105 | if (searchBox === null) return; 106 | searchBox.appendChild( 107 | document 108 | .createRange() 109 | .createContextualFragment( 110 | '

' + 111 | '' + 112 | _("Hide Search Matches") + 113 | "

" 114 | ) 115 | ); 116 | }, 117 | 118 | /** 119 | * helper function to hide the search marks again 120 | */ 121 | hideSearchWords: () => { 122 | document 123 | .querySelectorAll("#searchbox .highlight-link") 124 | .forEach((el) => el.remove()); 125 | document 126 | .querySelectorAll("span.highlighted") 127 | .forEach((el) => el.classList.remove("highlighted")); 128 | localStorage.removeItem("sphinx_highlight_terms") 129 | }, 130 | 131 | initEscapeListener: () => { 132 | // only install a listener if it is really needed 133 | if (!DOCUMENTATION_OPTIONS.ENABLE_SEARCH_SHORTCUTS) return; 134 | 135 | document.addEventListener("keydown", (event) => { 136 | // bail for input elements 137 | if (BLACKLISTED_KEY_CONTROL_ELEMENTS.has(document.activeElement.tagName)) return; 138 | // bail with special keys 139 | if (event.shiftKey || event.altKey || event.ctrlKey || event.metaKey) return; 140 | if (DOCUMENTATION_OPTIONS.ENABLE_SEARCH_SHORTCUTS && (event.key === "Escape")) { 141 | SphinxHighlight.hideSearchWords(); 142 | event.preventDefault(); 143 | } 144 | }); 145 | }, 146 | }; 147 | 148 | _ready(() => { 149 | /* Do not call highlightSearchWords() when we are on the search page. 150 | * It will highlight words from the *previous* search query. 151 | */ 152 | if (typeof Search === "undefined") SphinxHighlight.highlightSearchWords(); 153 | SphinxHighlight.initEscapeListener(); 154 | }); 155 | -------------------------------------------------------------------------------- /docs/build/html/genindex.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | Index — simpleaudiostretch 0.1.0 documentation 7 | 8 | 9 | 10 | 11 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 |
27 | 49 | 50 |
54 | 55 |
56 |
57 |
58 |
    59 |
    • 60 |
  • Index
    • 61 |
  • 62 |
    • 63 |
64 |
65 |
66 |
67 |
68 | 69 | 70 |

Index

71 | 72 |
73 | M 74 | | S 75 | 76 |
77 |

M

78 | 79 | 88 |
89 | 90 |

S

91 | 92 | 101 | 107 |
    93 |
  • 94 | simplestretch 95 | 96 |
    • 100 |
108 | 109 | 110 | 111 |
112 |
113 |
114 | 115 |
116 | 117 |
118 |

© Copyright 2024, Mews.

119 |
120 | 121 | Built with Sphinx using a 122 | theme 123 | provided by Read the Docs. 124 | 125 | 126 |
127 |
128 |
129 |
130 |
131 | 136 | 137 | 138 | -------------------------------------------------------------------------------- /docs/build/html/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | Welcome to simpleaudiostretch’s documentation! — simpleaudiostretch 0.1.0 documentation 8 | 9 | 10 | 11 | 12 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 54 | 55 |
59 | 60 |
61 |
62 |
63 |
    64 |
    • 65 |
  • Welcome to simpleaudiostretch’s documentation!
    • 66 |
  • 67 | View page source 68 |
    • 69 |
70 |
71 |
72 |
73 |
74 | 75 |
76 |

Welcome to simpleaudiostretch’s documentation!

77 |
78 |
79 |
80 |
81 |

Indices and tables

82 | 87 |
88 | 89 | 90 |
91 |
92 |
93 | 94 |
95 | 96 |
97 |

© Copyright 2024, Mews.

98 |
99 | 100 | Built with Sphinx using a 101 | theme 102 | provided by Read the Docs. 103 | 104 | 105 |
106 |
107 |
108 |
109 |
110 | 115 | 116 | 117 | -------------------------------------------------------------------------------- /docs/build/html/modules.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | simplestretch — simpleaudiostretch 0.1.0 documentation 8 | 9 | 10 | 11 | 12 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 53 | 54 |
58 | 59 |
60 |
61 |
62 | 69 |
70 |
71 |
72 |
73 | 74 |
75 |

simplestretch

76 |
77 | 87 |
88 |
89 | 90 | 91 |
92 |
93 |
94 | 95 |
96 | 97 |
98 |

© Copyright 2024, Mews.

99 |
100 | 101 | Built with Sphinx using a 102 | theme 103 | provided by Read the Docs. 104 | 105 | 106 |
107 |
108 |
109 |
110 |
111 | 116 | 117 | 118 | -------------------------------------------------------------------------------- /docs/build/html/objects.inv: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Mews/simpleaudiostretch/edf6bd51b4b2edc920dc35528cb4d0fc6c2450fc/docs/build/html/objects.inv -------------------------------------------------------------------------------- /docs/build/html/py-modindex.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | Python Module Index — simpleaudiostretch 0.1.0 documentation 7 | 8 | 9 | 10 | 11 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 28 | 29 | 30 | 31 | 32 | 33 |
34 | 56 | 57 |
61 | 62 |
63 |
64 |
65 |
    66 |
    • 67 |
  • Python Module Index
    • 68 |
  • 69 |
    • 70 |
71 |
72 |
73 |
74 |
75 | 76 | 77 |

Python Module Index

78 | 79 |
80 | s 81 |
82 | 83 | 84 | 85 | 87 | 88 | 89 | 92 |
 
86 | s
90 | simplestretch 91 |
93 | 94 | 95 |
96 |
97 |
98 | 99 |
100 | 101 |
102 |

© Copyright 2024, Mews.

103 |
104 | 105 | Built with Sphinx using a 106 | theme 107 | provided by Read the Docs. 108 | 109 | 110 |
111 |
112 |
113 |
114 |
115 | 120 | 121 | 122 | -------------------------------------------------------------------------------- /docs/build/html/search.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | Search — simpleaudiostretch 0.1.0 documentation 7 | 8 | 9 | 10 | 11 | 12 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 |
30 | 52 | 53 |
57 | 58 |
59 |
60 |
61 |
    62 |
    • 63 |
  • Search
    • 64 |
  • 65 |
    • 66 |
67 |
68 |
69 |
70 |
71 | 72 | 79 | 80 | 81 |
82 | 83 |
84 | 85 |
86 |
87 |
88 | 89 |
90 | 91 |
92 |

© Copyright 2024, Mews.

93 |
94 | 95 | Built with Sphinx using a 96 | theme 97 | provided by Read the Docs. 98 | 99 | 100 |
101 |
102 |
103 |
104 |
105 | 110 | 113 | 114 | 115 | 116 | 117 | 118 | 119 | -------------------------------------------------------------------------------- /docs/build/html/searchindex.js: -------------------------------------------------------------------------------- 1 | Search.setIndex({"docnames": ["index", "modules", "simplestretch"], "filenames": ["index.rst", "modules.rst", "simplestretch.rst"], "titles": ["Welcome to simpleaudiostretch\u2019s documentation!", "simplestretch", "simplestretch package"], "terms": {"index": 0, "modul": [0, 1], "search": 0, "page": 0, "packag": 1, "content": 1, "speedup_audio": [1, 2], "stretch_audio": [1, 2], "audio": 2, "str": 2, "numpi": 2, "ndarrai": 2, "factor": 2, "float": 2, "output": 2, "none": 2, "sampler": 2, "int": 2, "tupl": 2, "thi": 2, "function": 2, "i": 2, "us": 2, "chang": 2, "an": 2, "": 2, "speed": 2, "certain": 2, "becaus": 2, "doesn": 2, "t": 2, "appli": 2, "ani": 2, "resampl": 2, "similar": 2, "algorithm": 2, "veri": 2, "low": 2, "around": 2, "0": 2, "2": 2, "lower": 2, "qualiti": 2, "might": 2, "decreas": 2, "notic": 2, "paramet": 2, "The": 2, "sped": 2, "up": 2, "down": 2, "you": 2, "can": 2, "provid": 2, "either": 2, "path": 2, "file": 2, "contain": 2, "your": 2, "raw": 2, "sound": 2, "data": 2, "which": 2, "For": 2, "exampl": 2, "make": 2, "twice": 2, "fast": 2, "5": 2, "half": 2, "option": 2, "save": 2, "If": 2, "argument": 2, "pass": 2, "wont": 2, "sampl": 2, "rate": 2, "origin": 2, "onli": 2, "need": 2, "ve": 2, "otherwis": 2, "determin": 2, "automat": 2, "return": 2, "A": 2, "whether": 2, "get": 2, "type": 2, "stretch": 2, "length": 2, "high": 2, "higher": 2, "long": 2}, "objects": {"": [[2, 0, 0, "-", "simplestretch"]], "simplestretch": [[2, 1, 1, "", "speedup_audio"], [2, 1, 1, "", "stretch_audio"]]}, "objtypes": {"0": "py:module", "1": "py:function"}, "objnames": {"0": ["py", "module", "Python module"], "1": ["py", "function", "Python function"]}, "titleterms": {"welcom": 0, "simpleaudiostretch": 0, "": 0, "document": 0, "indic": 0, "tabl": 0, "simplestretch": [1, 2], "packag": 2, "modul": 2, "content": 2}, "envversion": {"sphinx.domains.c": 3, "sphinx.domains.changeset": 1, "sphinx.domains.citation": 1, "sphinx.domains.cpp": 9, "sphinx.domains.index": 1, "sphinx.domains.javascript": 3, "sphinx.domains.math": 2, "sphinx.domains.python": 4, "sphinx.domains.rst": 2, "sphinx.domains.std": 2, "sphinx": 60}, "alltitles": {"Welcome to simpleaudiostretch\u2019s documentation!": [[0, "welcome-to-simpleaudiostretch-s-documentation"]], "Indices and tables": [[0, "indices-and-tables"]], "simplestretch": [[1, "simplestretch"]], "simplestretch package": [[2, "simplestretch-package"]], "Module contents": [[2, "module-simplestretch"]]}, "indexentries": {"module": [[2, "module-simplestretch"]], "simplestretch": [[2, "module-simplestretch"]], "speedup_audio() (in module simplestretch)": [[2, "simplestretch.speedup_audio"]], "stretch_audio() (in module simplestretch)": [[2, "simplestretch.stretch_audio"]]}}) -------------------------------------------------------------------------------- /docs/build/html/simplestretch.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | 6 | 7 | simplestretch package — simpleaudiostretch 0.1.0 documentation 8 | 9 | 10 | 11 | 12 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 |
28 | 60 | 61 |
65 | 66 |
67 |
68 |
69 | 76 |
77 |
78 |
79 |
80 | 81 |
82 |

simplestretch package

83 |
84 |

Module contents

85 |
86 |
87 | simplestretch.speedup_audio(audio: str | numpy.ndarray, factor: float, output: str | None = None, samplerate: int | None = None) → Tuple[numpy.ndarray, int]
88 |

This function is used to change an audio’s speed by a certain factor.

89 |

Because this function doesn’t apply any resampling or similar algorithms, for very low factors (around 0.2 or lower) the audio quality might decrease noticeably.

90 |
91 |
Parameters:
92 |
    93 |

  • audio (str | numpy.ndarray) –

    The audio to be sped up or down.

    94 |

    You can provide either a path to a file containing your audio, or the raw sound data as a numpy ndarray.

    95 |

    • 96 |

  • factor (float) –

    This is the factor by which the speed of the audio will be changed.

    97 |

    For example, a factor of 2 will make the audio twice as fast, and a factor of 0.5 will make the audio half as fast.

    98 |

    • 99 |

  • output (str, optional) –

    This is the path to which the sped up audio will be saved.

    100 |

    If no argument is passed, it wont save the audio to a file.

    101 |

    • 102 |

  • samplerate (int, optional) –

    The sample rate of the original audio.

    103 |

    You only need to pass this argument if you’ve provided a numpy ndarray as the audio. Otherwise, it will be determined automatically.

    104 |

    • 105 |
106 |
107 |
Returns:
108 |

A tuple containing the sped up audio data and sample rate.

109 |

This is returned whether or not the audio gets saved to a file.

110 |

111 |
112 |
Return type:
113 |

Tuple[ndarray, int]

114 |
115 |
116 |
117 | 118 |
119 |
120 | simplestretch.stretch_audio(audio: str | numpy.ndarray, factor: float, output: str | None = None, samplerate: int | None = None) → Tuple[numpy.ndarray, int]
121 |

This function is used to stretch an audio’s length by a certain factor.

122 |

Because this function doesn’t apply any resampling or similar algorithms, for very high factors (around 5 or higher) the audio quality might decrease noticeably.

123 |
124 |
Parameters:
125 |
    126 |

  • audio (str | numpy.ndarray) –

    The audio to be stretched.

    127 |

    You can provide either a path to a file containing your audio, or the raw sound data as a numpy ndarray.

    128 |

    • 129 |

  • factor (float) –

    This is the factor by which the length of the audio will be changed.

    130 |

    For example, a factor of 2 will make the audio twice as long, and a factor of 0.5 will make the audio half as long.

    131 |

    • 132 |

  • output (str, optional) –

    This is the path to which the stretched audio will be saved.

    133 |

    If no argument is passed, it wont save the audio to a file.

    134 |

    • 135 |

  • samplerate (int, optional) –

    The sample rate of the original audio.

    136 |

    You only need to pass this argument if you’ve provided a numpy ndarray as the audio. Otherwise, it will be determined automatically.

    137 |

    • 138 |
139 |
140 |
Returns:
141 |

A tuple containing the stretched audio data and sample rate.

142 |

This is returned whether or not the audio gets saved to a file.

143 |

144 |
145 |
Return type:
146 |

Tuple[ndarray, int]

147 |
148 |
149 |
150 | 151 |
152 |
153 | 154 | 155 |
156 |
157 |
158 | 159 |
160 | 161 |
162 |

© Copyright 2024, Mews.

163 |
164 | 165 | Built with Sphinx using a 166 | theme 167 | provided by Read the Docs. 168 | 169 | 170 |
171 |
172 |
173 |
174 |
175 | 180 | 181 | 182 | -------------------------------------------------------------------------------- /docs/make.bat: -------------------------------------------------------------------------------- 1 | @ECHO OFF 2 | 3 | pushd %~dp0 4 | 5 | REM Command file for Sphinx documentation 6 | 7 | if "%SPHINXBUILD%" == "" ( 8 | set SPHINXBUILD=sphinx-build 9 | ) 10 | set SOURCEDIR=source 11 | set BUILDDIR=build 12 | 13 | %SPHINXBUILD% >NUL 2>NUL 14 | if errorlevel 9009 ( 15 | echo. 16 | echo.The 'sphinx-build' command was not found. Make sure you have Sphinx 17 | echo.installed, then set the SPHINXBUILD environment variable to point 18 | echo.to the full path of the 'sphinx-build' executable. Alternatively you 19 | echo.may add the Sphinx directory to PATH. 20 | echo. 21 | echo.If you don't have Sphinx installed, grab it from 22 | echo.https://www.sphinx-doc.org/ 23 | exit /b 1 24 | ) 25 | 26 | if "%1" == "" goto help 27 | 28 | %SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O% 29 | goto end 30 | 31 | :help 32 | %SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O% 33 | 34 | :end 35 | popd 36 | -------------------------------------------------------------------------------- /docs/requirements.txt: -------------------------------------------------------------------------------- 1 | sphinx_rtd_theme==2.0.0 2 | -------------------------------------------------------------------------------- /docs/source/conf.py: -------------------------------------------------------------------------------- 1 | # Tell sphinx and rtd where to find source code 2 | import pathlib 3 | import sys 4 | 5 | sys.path.append( 6 | (pathlib.Path(__file__).parent.parent.parent / "src").resolve().as_posix() 7 | ) 8 | 9 | # Configuration file for the Sphinx documentation builder. 10 | # 11 | # For the full list of built-in configuration values, see the documentation: 12 | # https://www.sphinx-doc.org/en/master/usage/configuration.html 13 | 14 | # -- Project information ----------------------------------------------------- 15 | # https://www.sphinx-doc.org/en/master/usage/configuration.html#project-information 16 | 17 | project = "simpleaudiostretch" 18 | copyright = "2024, Mews" 19 | author = "Mews" 20 | release = "0.1.0" 21 | 22 | # -- General configuration --------------------------------------------------- 23 | # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration 24 | import sphinx_rtd_theme 25 | 26 | extensions = ["sphinx.ext.autodoc", "sphinx_rtd_theme", "sphinx.ext.autosummary"] 27 | 28 | templates_path = ["_templates"] 29 | exclude_patterns = [] 30 | 31 | autodoc_mock_imports = ["numpy", "soundfile"] 32 | 33 | # -- Options for HTML output ------------------------------------------------- 34 | # https://www.sphinx-doc.org/en/master/usage/configuration.html#options-for-html-output 35 | 36 | html_theme = "sphinx_rtd_theme" 37 | html_static_path = ["_static"] 38 | -------------------------------------------------------------------------------- /docs/source/index.rst: -------------------------------------------------------------------------------- 1 | .. simpleaudiostretch documentation master file, created by 2 | sphinx-quickstart on Wed Jun 5 09:28:38 2024. 3 | You can adapt this file completely to your liking, but it should at least 4 | contain the root `toctree` directive. 5 | 6 | Welcome to simpleaudiostretch's documentation! 7 | ============================================== 8 | 9 | .. toctree:: 10 | :maxdepth: 2 11 | :caption: Contents: 12 | 13 | 14 | 15 | Indices and tables 16 | ================== 17 | 18 | * :ref:`genindex` 19 | * :ref:`modindex` 20 | * :ref:`search` 21 | -------------------------------------------------------------------------------- /docs/source/modules.rst: -------------------------------------------------------------------------------- 1 | simplestretch 2 | ============= 3 | 4 | .. toctree:: 5 | :maxdepth: 4 6 | 7 | simplestretch 8 | -------------------------------------------------------------------------------- /docs/source/simplestretch.rst: -------------------------------------------------------------------------------- 1 | simplestretch package 2 | ===================== 3 | 4 | Module contents 5 | --------------- 6 | 7 | .. automodule:: simplestretch 8 | :members: 9 | :undoc-members: 10 | :show-inheritance: 11 | -------------------------------------------------------------------------------- /pyproject.toml: -------------------------------------------------------------------------------- 1 | [build-system] 2 | requires = ["hatchling"] 3 | build-backend = "hatchling.build" 4 | 5 | [tool.hatch.build.targets.wheel] 6 | packages = ["src/simplestretch"] 7 | 8 | [project.scripts] 9 | simplestretch = "simplestretch.cli:main" 10 | 11 | [project] 12 | name = "simpleaudiostretch" 13 | version = "0.2.4" 14 | authors = [ 15 | { name="Mews", email="tiraraspas@gmail.com" }, 16 | ] 17 | description = "A small package to stretch audio" 18 | readme = "README.md" 19 | requires-python = ">=3.8" 20 | classifiers = [ 21 | "Programming Language :: Python :: 3", 22 | "License :: OSI Approved :: GNU General Public License v3 (GPLv3)", 23 | "Operating System :: OS Independent", 24 | ] 25 | dependencies = [ 26 | "soundfile", 27 | "numpy", 28 | ] 29 | keywords = ["audio", "speed", "stretch", "wav", "mp3", "sound"] 30 | 31 | [project.urls] 32 | Homepage = "https://github.com/Mews/simpleaudiostretch" 33 | Issues = "https://github.com/Mews/simpleaudiostretch/issues" -------------------------------------------------------------------------------- /requirements.txt: -------------------------------------------------------------------------------- 1 | numpy==1.26.4 2 | soundfile==0.12.1 3 | coverage==7.5.3 -------------------------------------------------------------------------------- /src/simplestretch/__init__.py: -------------------------------------------------------------------------------- 1 | import pathlib 2 | from typing import Optional, Tuple, Union 3 | 4 | import soundfile 5 | from numpy import ndarray 6 | 7 | 8 | def stretch_audio( 9 | audio: Union[str, ndarray], 10 | factor: float, 11 | output: Optional[str] = None, 12 | samplerate: Optional[int] = None, 13 | ) -> Tuple[ndarray, int]: 14 | """This function is used to stretch an audio's length by a certain factor.\n 15 | Because this function doesn't apply any resampling or similar algorithms, for very high factors (around 5 or higher) the audio quality might decrease noticeably. 16 | 17 | :param audio: The audio to be stretched.\n 18 | You can provide either a path to a file containing your audio, or the raw sound data as a numpy ndarray. 19 | :type audio: str | numpy.ndarray 20 | 21 | :param factor: This is the factor by which the length of the audio will be changed.\n 22 | For example, a factor of 2 will make the audio twice as long, and a factor of 0.5 will make the audio half as long. 23 | :type factor: float 24 | 25 | :param output: This is the path to which the stretched audio will be saved.\n 26 | If no argument is passed, it wont save the audio to a file. 27 | :type output: str, optional 28 | 29 | :param samplerate: The sample rate of the original audio.\n 30 | You only need to pass this argument if you've provided a numpy ndarray as the audio. Otherwise, it will be determined automatically. 31 | :type samplerate: int, optional 32 | 33 | :return: A tuple containing the stretched audio data and sample rate.\n 34 | This is returned whether or not the audio gets saved to a file. 35 | :rtype: Tuple[ndarray, int] 36 | 37 | """ 38 | 39 | # Type checks 40 | if not (isinstance(audio, str) or isinstance(audio, ndarray)): 41 | raise TypeError("'audio' must be the path to a audio file or a numpy ndarray") 42 | 43 | if factor <= 0: 44 | raise ValueError("'factor' must be greater than 0") 45 | 46 | if isinstance(audio, ndarray) and not isinstance(samplerate, int): 47 | try: 48 | samplerate = int(samplerate) 49 | except: 50 | raise TypeError( 51 | f"You must provide a valid sample rate when working with raw audio data (Not {type(samplerate)})" 52 | ) 53 | 54 | # If a file path is provided, load it as a ndarray using soundfile 55 | if isinstance(audio, str): 56 | audio, samplerate = soundfile.read(audio) 57 | 58 | stretched_samplerate = round(samplerate / factor) 59 | 60 | if isinstance(output, str): 61 | try: 62 | soundfile.write(output, audio, samplerate=stretched_samplerate) 63 | except soundfile.LibsndfileError as exc: 64 | # Delete invalid file 65 | pathlib.Path(output).unlink() 66 | 67 | exc.prefix += "\n(Try saving it as a .wav file instead)\n" 68 | 69 | raise exc 70 | 71 | return (audio, stretched_samplerate) 72 | 73 | 74 | def speedup_audio( 75 | audio: Union[str, ndarray], 76 | factor: float, 77 | output: Optional[str] = None, 78 | samplerate: Optional[int] = None, 79 | ) -> Tuple[ndarray, int]: 80 | """This function is used to change an audio's speed by a certain factor.\n 81 | Because this function doesn't apply any resampling or similar algorithms, for very low factors (around 0.2 or lower) the audio quality might decrease noticeably. 82 | 83 | :param audio: The audio to be sped up or down.\n 84 | You can provide either a path to a file containing your audio, or the raw sound data as a numpy ndarray. 85 | :type audio: str | numpy.ndarray 86 | 87 | :param factor: This is the factor by which the speed of the audio will be changed.\n 88 | For example, a factor of 2 will make the audio twice as fast, and a factor of 0.5 will make the audio half as fast. 89 | :type factor: float 90 | 91 | :param output: This is the path to which the sped up audio will be saved.\n 92 | If no argument is passed, it wont save the audio to a file. 93 | :type output: str, optional 94 | 95 | :param samplerate: The sample rate of the original audio.\n 96 | You only need to pass this argument if you've provided a numpy ndarray as the audio. Otherwise, it will be determined automatically. 97 | :type samplerate: int, optional 98 | 99 | :return: A tuple containing the sped up audio data and sample rate.\n 100 | This is returned whether or not the audio gets saved to a file. 101 | :rtype: Tuple[ndarray, int] 102 | 103 | """ 104 | 105 | # Type checks 106 | if factor <= 0: 107 | raise ValueError("'factor' must be greater than 0") 108 | 109 | # Stretch audio to match the specified speedup factor 110 | return stretch_audio( 111 | audio=audio, factor=1 / factor, output=output, samplerate=samplerate 112 | ) 113 | -------------------------------------------------------------------------------- /src/simplestretch/cli.py: -------------------------------------------------------------------------------- 1 | import argparse 2 | 3 | from . import speedup_audio, stretch_audio 4 | 5 | 6 | def main(): 7 | parser = argparse.ArgumentParser("Stretch an audio file or speed it up or down") 8 | 9 | parser.add_argument( 10 | "-a", "--audio", required=True, type=str, help="Path to the audio file" 11 | ) 12 | parser.add_argument( 13 | "-f", 14 | "--factor", 15 | required=True, 16 | type=float, 17 | help="Factor for the change in audio length/speed", 18 | ) 19 | parser.add_argument( 20 | "-o", "--output", required=True, type=str, help="Path for the output file" 21 | ) 22 | parser.add_argument( 23 | "-s", 24 | "--speed", 25 | action="store_true", 26 | help="If this is passed, the factor will be applied to the speed of the audio rather than the length", 27 | ) 28 | 29 | args = parser.parse_args() 30 | 31 | if args.speed: 32 | speedup_audio(audio=args.audio, factor=args.factor, output=args.output) 33 | 34 | else: 35 | stretch_audio(audio=args.audio, factor=args.factor, output=args.output) 36 | -------------------------------------------------------------------------------- /tests/sample_files/440hz.mp3: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Mews/simpleaudiostretch/edf6bd51b4b2edc920dc35528cb4d0fc6c2450fc/tests/sample_files/440hz.mp3 -------------------------------------------------------------------------------- /tests/sample_files/440hz.wav: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Mews/simpleaudiostretch/edf6bd51b4b2edc920dc35528cb4d0fc6c2450fc/tests/sample_files/440hz.wav -------------------------------------------------------------------------------- /tests/test_files/speedup_save_test.wav: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Mews/simpleaudiostretch/edf6bd51b4b2edc920dc35528cb4d0fc6c2450fc/tests/test_files/speedup_save_test.wav -------------------------------------------------------------------------------- /tests/test_files/stretch_save_test.wav: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/Mews/simpleaudiostretch/edf6bd51b4b2edc920dc35528cb4d0fc6c2450fc/tests/test_files/stretch_save_test.wav -------------------------------------------------------------------------------- /tests/test_speedup.py: -------------------------------------------------------------------------------- 1 | """ 2 | Audio tone files from https://www.mediacollege.com/audio/tone/download/ 3 | """ 4 | 5 | import os 6 | import sys 7 | 8 | sys.path.insert( 9 | 0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "src")) 10 | ) 11 | 12 | import pathlib 13 | 14 | import numpy as np 15 | import pytest 16 | import soundfile 17 | 18 | from simplestretch import speedup_audio 19 | 20 | 21 | class TestStretch: 22 | # Create a simple audio signal for testing 23 | sine_samplerate = 44100 24 | duration = 2 # seconds 25 | t = np.linspace(0, duration, int(sine_samplerate * duration), endpoint=False) 26 | sine_audio = 0.5 * np.sin(2 * np.pi * 440 * t) # Generate a 440 Hz sine wave 27 | 28 | def test_speedup_audio_raw(self): 29 | factor = 2 30 | 31 | spedup_audio, spedup_samplerate = speedup_audio( 32 | audio=self.sine_audio, factor=factor, samplerate=self.sine_samplerate 33 | ) 34 | 35 | assert self.sine_audio.all() == spedup_audio.all() 36 | 37 | assert round(self.sine_samplerate / (1 / factor)) == spedup_samplerate 38 | 39 | def test_speedup_audio_file_wav(self): 40 | factor = 2 41 | file = "tests/sample_files/440hz.wav" 42 | 43 | audio, samplerate = soundfile.read(file) 44 | 45 | spedup_audio, spedup_samplerate = speedup_audio(audio=file, factor=factor) 46 | 47 | assert audio.all() == spedup_audio.all() 48 | 49 | assert round(samplerate / (1 / factor)) == spedup_samplerate 50 | 51 | def test_speedup_audio_file_mp3(self): 52 | factor = 2 53 | file = "tests/sample_files/440hz.wav" 54 | 55 | audio, samplerate = soundfile.read(file) 56 | 57 | spedup_audio, spedup_samplerate = speedup_audio(audio=file, factor=factor) 58 | 59 | assert audio.all() == spedup_audio.all() 60 | 61 | assert round(samplerate / (1 / factor)) == spedup_samplerate 62 | 63 | def test_speedup_save_audio_file(self): 64 | factor = 2 65 | out_file = "tests/test_files/speedup_save_test.wav" 66 | 67 | speedup_audio( 68 | audio=self.sine_audio, 69 | factor=factor, 70 | output=out_file, 71 | samplerate=self.sine_samplerate, 72 | ) 73 | 74 | # Assert the file exists 75 | path = pathlib.Path(out_file) 76 | assert path.is_file() 77 | 78 | # Assert the file contents are correct 79 | out_audio, out_samplerate = soundfile.read(out_file) 80 | 81 | assert self.sine_audio.all() == out_audio.all() 82 | 83 | assert round(self.sine_samplerate / (1 / factor)) == out_samplerate 84 | 85 | def test_speedup_invalid_factor_zero(self): 86 | with pytest.raises(ValueError): 87 | speedup_audio( 88 | audio=self.sine_audio, factor=0, samplerate=self.sine_samplerate 89 | ) 90 | 91 | def test_speedup_invalid_factor_negative(self): 92 | with pytest.raises(ValueError): 93 | speedup_audio( 94 | audio=self.sine_audio, factor=-1, samplerate=self.sine_samplerate 95 | ) 96 | -------------------------------------------------------------------------------- /tests/test_stretch.py: -------------------------------------------------------------------------------- 1 | """ 2 | Audio tone files from https://www.mediacollege.com/audio/tone/download/ 3 | """ 4 | 5 | import os 6 | import sys 7 | 8 | sys.path.insert( 9 | 0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..", "src")) 10 | ) 11 | 12 | import pathlib 13 | 14 | import numpy as np 15 | import pytest 16 | import soundfile 17 | 18 | from simplestretch import stretch_audio 19 | 20 | 21 | class TestStretch: 22 | # Create a simple audio signal for testing 23 | sine_samplerate = 44100 24 | duration = 2 # seconds 25 | t = np.linspace(0, duration, int(sine_samplerate * duration), endpoint=False) 26 | sine_audio = 0.5 * np.sin(2 * np.pi * 440 * t) # Generate a 440 Hz sine wave 27 | 28 | def test_stretch_audio_raw(self): 29 | factor = 2 30 | 31 | stretched_audio, stretched_samplerate = stretch_audio( 32 | audio=self.sine_audio, factor=factor, samplerate=self.sine_samplerate 33 | ) 34 | 35 | assert self.sine_audio.all() == stretched_audio.all() 36 | 37 | assert round(self.sine_samplerate / factor) == stretched_samplerate 38 | 39 | def test_stretch_audio_file_wav(self): 40 | factor = 2 41 | file = "tests/sample_files/440hz.wav" 42 | 43 | audio, samplerate = soundfile.read(file) 44 | 45 | stretched_audio, stretched_samplerate = stretch_audio(audio=file, factor=factor) 46 | 47 | assert audio.all() == stretched_audio.all() 48 | 49 | assert round(samplerate / factor) == stretched_samplerate 50 | 51 | def test_stretch_audio_file_mp3(self): 52 | factor = 2 53 | file = "tests/sample_files/440hz.mp3" 54 | 55 | audio, samplerate = soundfile.read(file) 56 | 57 | stretched_audio, stretched_samplerate = stretch_audio(audio=file, factor=factor) 58 | 59 | assert audio.all() == stretched_audio.all() 60 | 61 | assert round(samplerate / factor) == stretched_samplerate 62 | 63 | def test_stretch_save_audio_file_wav(self): 64 | factor = 2 65 | out_file = "tests/test_files/stretch_save_test.wav" 66 | 67 | stretch_audio( 68 | audio=self.sine_audio, 69 | factor=factor, 70 | output=out_file, 71 | samplerate=self.sine_samplerate, 72 | ) 73 | 74 | # Assert the file exists 75 | path = pathlib.Path(out_file) 76 | assert path.is_file() 77 | 78 | # Assert the file contents are correct 79 | out_audio, out_samplerate = soundfile.read(out_file) 80 | 81 | assert self.sine_audio.all() == out_audio.all() 82 | 83 | assert round(self.sine_samplerate / factor) == out_samplerate 84 | 85 | def test_stretch_invalid_audio_type(self): 86 | factor = 2 87 | 88 | # Pass an invalid audio data type 89 | with pytest.raises(TypeError): 90 | stretch_audio(audio=None, factor=factor, samplerate=self.sine_samplerate) 91 | 92 | def test_stretch_invalid_factor_zero(self): 93 | with pytest.raises(ValueError): 94 | stretch_audio( 95 | audio=self.sine_audio, factor=0, samplerate=self.sine_samplerate 96 | ) 97 | 98 | def test_stretch_invalid_factor_negative(self): 99 | with pytest.raises(ValueError): 100 | stretch_audio( 101 | audio=self.sine_audio, factor=-1, samplerate=self.sine_samplerate 102 | ) 103 | 104 | def test_stretch_raw_data_no_samplerate(self): 105 | factor = 2 106 | 107 | with pytest.raises(TypeError): 108 | stretch_audio(audio=self.sine_audio, factor=factor) 109 | 110 | def test_stretch_raw_data_invalid_samplerate(self): 111 | factor = 2 112 | 113 | with pytest.raises(TypeError): 114 | stretch_audio(audio=self.sine_audio, factor=factor, samplerate="") 115 | 116 | def test_stretch_raw_data_float_samplerate(self): 117 | factor = 2 118 | 119 | stretched_audio, stretched_samplerate = stretch_audio( 120 | audio=self.sine_audio, factor=factor, samplerate=float(self.sine_samplerate) 121 | ) 122 | 123 | assert self.sine_audio.all() == stretched_audio.all() 124 | 125 | assert round(self.sine_samplerate / factor) == stretched_samplerate 126 | 127 | def test_stretch_save_invalid_mp3_samplerate(self): 128 | factor = 0.5 129 | 130 | out_file = "tests/test_files/stretch_invalid_mp3_save_test.mp3" 131 | 132 | with pytest.raises(soundfile.LibsndfileError): 133 | stretch_audio( 134 | audio=self.sine_audio, 135 | factor=factor, 136 | output=out_file, 137 | samplerate=self.sine_samplerate, 138 | ) 139 | 140 | # Assert file was deleted 141 | assert not pathlib.Path(out_file).exists() 142 | --------------------------------------------------------------------------------