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larme · Aug 31, 2020 · 5ed4e2a · 5ed4e2a
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diff --git a/.gitignore b/.gitignore
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+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+cover/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
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+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
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+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+.pybuilder/
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+#   For a library or package, you might want to ignore these files since the code is
+#   intended to run in multiple environments; otherwise, check them in:
+# .python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if having platform-specific dependencies or dependencies
+#   having no cross-platform support, pipenv may install dependencies that don't work, or not
+#   install all needed dependencies.
+#Pipfile.lock
+
+# PEP 582; used by e.g. github.com/David-OConnor/pyflow
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.env
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
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+# Spyder project settings
+.spyderproject
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+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
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+# Pyre type checker
+.pyre/
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+# pytype static type analyzer
+.pytype/
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+# Cython debug symbols
+cython_debug/
diff --git a/fakebox/__init__.py b/fakebox/__init__.py
diff --git a/fakebox/conf.py b/fakebox/conf.py
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+DEFAULT_SAMPLE_RATE = 44100
+DEFAULT_BIT_N = 16
diff --git a/fakebox/dsp.py b/fakebox/dsp.py
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+import abc
+
+import numpy as np
+
+from fakebox.conf import DEFAULT_SAMPLE_RATE, DEFAULT_BIT_N
+
+DSPFloat = np.float64
+DSPZero = DSPFloat(0.0)
+DSPOne_L = DSPFloat(1.0 - 1e-8)
+
+class DSPContext(object):
+
+    def __init__(self, sample_rate=DEFAULT_SAMPLE_RATE, bit_n=DEFAULT_BIT_N):
+        self.sample_rate = sample_rate
+        self.bit_n = bit_n
+        self.sample_step = 0
+
+    def tick(self):
+        self.sample_step += 1
+
+
+ctx = DSPContext()
+
+
+class DSPObj(abc.ABC):
+
+    def __init__(self):
+
+        try:
+            self.in_n + self.out_n
+        except AttributeError:
+            raise NotImplementedError
+
+        self._ctx = ctx
+        self.counter = 0
+        self.in_buffer = np.zeros(self.in_n, dtype=DSPFloat)
+        self.out_buffer = np.zeros(self.out_n, dtype=DSPFloat)
+
+    def reset(self):
+        self.counter = 0
+        self.in_buffer = np.zeros(self.in_n, dtype=DSPFloat)
+        self.out_buffer = np.zeros(self.out_n, dtype=DSPFloat)
+
+    @abc.abstractmethod
+    def _tick(self, ins):
+        raise NotImplementedError
+
+    def tick(self):
+        outs = self._tick(self.in_buffer)
+        self.out_buffer[:] = outs
+        self.in_buffer[:] = DSPZero
+        self.counter += 1
+
+    @property
+    def sample_rate(self):
+        return self._ctx.sample_rate
+
+    @property
+    def bit_n(self):
+        return self._ctx.bit_n
+
diff --git a/fakebox/utils.py b/fakebox/utils.py
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+import numpy as np
+from scipy.io.wavfile import write
+
+import fakebox.dsp as dsp
+
+def test(dsp_ctx=dsp.ctx):
+    return dsp.ctx.sample_rate
+
+def init_waveform(duration=None, sample_n=None, ctx=dsp.ctx):
+
+    assert(duration or sample_n)
+
+    sample_rate = ctx.sample_rate
+
+    if duration:
+        sample_n = int(round(duration * sample_rate))
+
+    return np.zeros(sample_n, dtype=dsp.DSPFloat)
+
+
+def save_waveform(waveform, path, quiet_factor=0.5, ctx=dsp.ctx):
+
+    bit_n = ctx.bit_n
+    sample_rate = ctx.sample_rate
+    waveform_quiet = waveform * quiet_factor
+    waveform_integers = np.int16(waveform_quiet * (2 ** (bit_n - 1) - 1))
+    write(path, sample_rate, waveform_integers)
diff --git a/requirements.txt b/requirements.txt
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+scipy>=1.0
diff --git a/setup.py b/setup.py
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+from setuptools import setup
+
+setup(name='fakebox',
+      version='0.1',
+      description='toy dsp library in python',
+      url='http://github.com/larme/fakebox',
+      author='Zhao Shenyang',
+      author_email='dev@zsy.im',
+      license='MIT',
+      packages=['fakebox'],
+      install_requires=[
+          'numpy>=1.0',
+          'scipy>=1.0',
+      ],
+      zip_safe=False)
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		DEFAULT_SAMPLE_RATE = 44100
		DEFAULT_BIT_N = 16