synthio: Add adafruit_wave and use it in the manual test
This commit is contained in:
Jeff Epler
parent
93b0e5b746
commit
91978522c5
3
.gitmodules
vendored
3
.gitmodules
vendored
@ -338,3 +338,6 @@
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[submodule "frozen/circuitpython-pcf85063a"]
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path = frozen/circuitpython-pcf85063a
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url = https://github.com/bablokb/circuitpython-pcf85063a
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[submodule "frozen/Adafruit_CircuitPython_Wave"]
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path = frozen/Adafruit_CircuitPython_Wave
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url = http://github.com/adafruit/Adafruit_CircuitPython_Wave.git
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1
frozen/Adafruit_CircuitPython_Wave
Submodule
1
frozen/Adafruit_CircuitPython_Wave
Submodule
@ -0,0 +1 @@
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Subproject commit 02b748f2e6826dc442c842885e58b07ad10d9287
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@ -1 +0,0 @@
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../wave/audioop.py
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@ -1 +0,0 @@
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../wave/chunk.py
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@ -1,8 +1,14 @@
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import sys
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sys.path.insert(
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0, f"{__file__.rpartition('/')[0] or '.'}/../../../../frozen/Adafruit_CircuitPython_Wave"
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)
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import random
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import audiocore
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import synthio
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from ulab import numpy as np
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import wave
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import adafruit_wave as wave
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SAMPLE_SIZE = 1024
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VOLUME = 14700
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@ -1 +0,0 @@
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../wave/wave.py
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@ -1,11 +0,0 @@
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# SPDX-FileCopyrightText: 2023 Guido van Rossum <guido@cwi.nl> and others.
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#
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# SPDX-License-Identifier: PSF-2.0
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import struct
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def byteswap(data, sampwidth):
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print(data)
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raise
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ch = "I" if sampwidth == 16 else "H"
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@ -1,173 +0,0 @@
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# SPDX-FileCopyrightText: 2023 Guido van Rossum <guido@cwi.nl> and others.
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#
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# SPDX-License-Identifier: PSF-2.0
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"""Simple class to read IFF chunks.
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An IFF chunk (used in formats such as AIFF, TIFF, RMFF (RealMedia File
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Format)) has the following structure:
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+----------------+
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| ID (4 bytes) |
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+----------------+
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| size (4 bytes) |
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+----------------+
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| data |
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| ... |
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+----------------+
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The ID is a 4-byte string which identifies the type of chunk.
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The size field (a 32-bit value, encoded using big-endian byte order)
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gives the size of the whole chunk, including the 8-byte header.
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Usually an IFF-type file consists of one or more chunks. The proposed
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usage of the Chunk class defined here is to instantiate an instance at
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the start of each chunk and read from the instance until it reaches
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the end, after which a new instance can be instantiated. At the end
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of the file, creating a new instance will fail with an EOFError
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exception.
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Usage:
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while True:
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try:
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chunk = Chunk(file)
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except EOFError:
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break
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chunktype = chunk.getname()
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while True:
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data = chunk.read(nbytes)
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if not data:
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pass
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# do something with data
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The interface is file-like. The implemented methods are:
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read, close, seek, tell, isatty.
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Extra methods are: skip() (called by close, skips to the end of the chunk),
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getname() (returns the name (ID) of the chunk)
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The __init__ method has one required argument, a file-like object
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(including a chunk instance), and one optional argument, a flag which
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specifies whether or not chunks are aligned on 2-byte boundaries. The
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default is 1, i.e. aligned.
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"""
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class Chunk:
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def __init__(self, file, align=True, bigendian=True, inclheader=False):
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import struct
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self.closed = False
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self.align = align # whether to align to word (2-byte) boundaries
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if bigendian:
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strflag = ">"
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else:
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strflag = "<"
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self.file = file
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self.chunkname = file.read(4)
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if len(self.chunkname) < 4:
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raise EOFError
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try:
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self.chunksize = struct.unpack_from(strflag + "L", file.read(4))[0]
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except struct.error:
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raise EOFError from None
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if inclheader:
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self.chunksize = self.chunksize - 8 # subtract header
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self.size_read = 0
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try:
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self.offset = self.file.tell()
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except (AttributeError, OSError):
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self.seekable = False
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else:
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self.seekable = True
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def getname(self):
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"""Return the name (ID) of the current chunk."""
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return self.chunkname
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def getsize(self):
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"""Return the size of the current chunk."""
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return self.chunksize
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def close(self):
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if not self.closed:
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try:
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self.skip()
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finally:
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self.closed = True
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def isatty(self):
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if self.closed:
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raise ValueError("I/O operation on closed file")
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return False
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def seek(self, pos, whence=0):
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"""Seek to specified position into the chunk.
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Default position is 0 (start of chunk).
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If the file is not seekable, this will result in an error.
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"""
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if self.closed:
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raise ValueError("I/O operation on closed file")
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if not self.seekable:
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raise OSError("cannot seek")
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if whence == 1:
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pos = pos + self.size_read
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elif whence == 2:
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pos = pos + self.chunksize
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if pos < 0 or pos > self.chunksize:
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raise RuntimeError
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self.file.seek(self.offset + pos, 0)
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self.size_read = pos
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def tell(self):
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if self.closed:
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raise ValueError("I/O operation on closed file")
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return self.size_read
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def read(self, size=-1):
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"""Read at most size bytes from the chunk.
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If size is omitted or negative, read until the end
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of the chunk.
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"""
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if self.closed:
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raise ValueError("I/O operation on closed file")
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if self.size_read >= self.chunksize:
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return b""
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if size < 0:
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size = self.chunksize - self.size_read
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if size > self.chunksize - self.size_read:
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size = self.chunksize - self.size_read
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data = self.file.read(size)
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self.size_read = self.size_read + len(data)
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if self.size_read == self.chunksize and self.align and (self.chunksize & 1):
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dummy = self.file.read(1)
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self.size_read = self.size_read + len(dummy)
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return data
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def skip(self):
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"""Skip the rest of the chunk.
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If you are not interested in the contents of the chunk,
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this method should be called so that the file points to
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the start of the next chunk.
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"""
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if self.closed:
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raise ValueError("I/O operation on closed file")
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if self.seekable:
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try:
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n = self.chunksize - self.size_read
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# maybe fix alignment
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if self.align and (self.chunksize & 1):
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n = n + 1
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self.file.seek(n, 1)
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self.size_read = self.size_read + n
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return
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except OSError:
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pass
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while self.size_read < self.chunksize:
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n = min(8192, self.chunksize - self.size_read)
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dummy = self.read(n)
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if not dummy:
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raise EOFError
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@ -1,7 +1,13 @@
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import sys
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sys.path.insert(
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0, f"{__file__.rpartition('/')[0] or '.'}/../../../../frozen/Adafruit_CircuitPython_Wave"
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)
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import audiocore
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import synthio
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from ulab import numpy as np
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import wave
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import adafruit_wave as wave
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SAMPLE_SIZE = 1024
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VOLUME = 32700
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@ -1,550 +0,0 @@
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# SPDX-FileCopyrightText: 2023 Guido van Rossum <guido@cwi.nl> and others.
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#
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# SPDX-License-Identifier: PSF-2.0
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"""Stuff to parse WAVE files.
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Usage.
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Reading WAVE files:
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f = wave.open(file, 'r')
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where file is either the name of a file or an open file pointer.
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The open file pointer must have methods read(), seek(), and close().
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When the setpos() and rewind() methods are not used, the seek()
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method is not necessary.
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This returns an instance of a class with the following public methods:
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getnchannels() -- returns number of audio channels (1 for
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mono, 2 for stereo)
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getsampwidth() -- returns sample width in bytes
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getframerate() -- returns sampling frequency
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getnframes() -- returns number of audio frames
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getcomptype() -- returns compression type ('NONE' for linear samples)
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getcompname() -- returns human-readable version of
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compression type ('not compressed' linear samples)
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getparams() -- returns a namedtuple consisting of all of the
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above in the above order
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getmarkers() -- returns None (for compatibility with the
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aifc module)
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getmark(id) -- raises an error since the mark does not
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exist (for compatibility with the aifc module)
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readframes(n) -- returns at most n frames of audio
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rewind() -- rewind to the beginning of the audio stream
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setpos(pos) -- seek to the specified position
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tell() -- return the current position
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close() -- close the instance (make it unusable)
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The position returned by tell() and the position given to setpos()
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are compatible and have nothing to do with the actual position in the
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file.
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The close() method is called automatically when the class instance
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is destroyed.
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Writing WAVE files:
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f = wave.open(file, 'w')
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where file is either the name of a file or an open file pointer.
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The open file pointer must have methods write(), tell(), seek(), and
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close().
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This returns an instance of a class with the following public methods:
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setnchannels(n) -- set the number of channels
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setsampwidth(n) -- set the sample width
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setframerate(n) -- set the frame rate
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setnframes(n) -- set the number of frames
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setcomptype(type, name)
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-- set the compression type and the
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human-readable compression type
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setparams(tuple)
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-- set all parameters at once
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tell() -- return current position in output file
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writeframesraw(data)
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-- write audio frames without patching up the
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file header
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writeframes(data)
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-- write audio frames and patch up the file header
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close() -- patch up the file header and close the
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output file
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You should set the parameters before the first writeframesraw or
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writeframes. The total number of frames does not need to be set,
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but when it is set to the correct value, the header does not have to
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be patched up.
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It is best to first set all parameters, perhaps possibly the
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compression type, and then write audio frames using writeframesraw.
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When all frames have been written, either call writeframes(b'') or
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close() to patch up the sizes in the header.
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The close() method is called automatically when the class instance
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is destroyed.
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"""
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from chunk import Chunk
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from collections import namedtuple
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import audioop
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import builtins
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import struct
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import sys
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__all__ = ["open", "Error", "Wave_read", "Wave_write"]
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class Error(Exception):
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pass
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WAVE_FORMAT_PCM = 0x0001
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_array_fmts = None, "b", "h", None, "i"
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_wave_params = namedtuple(
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"_wave_params", "nchannels sampwidth framerate nframes comptype compname"
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)
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class Wave_read:
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"""Variables used in this class:
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These variables are available to the user though appropriate
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methods of this class:
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_file -- the open file with methods read(), close(), and seek()
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set through the __init__() method
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_nchannels -- the number of audio channels
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available through the getnchannels() method
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_nframes -- the number of audio frames
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available through the getnframes() method
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_sampwidth -- the number of bytes per audio sample
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available through the getsampwidth() method
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_framerate -- the sampling frequency
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available through the getframerate() method
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_comptype -- the AIFF-C compression type ('NONE' if AIFF)
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available through the getcomptype() method
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_compname -- the human-readable AIFF-C compression type
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available through the getcomptype() method
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_soundpos -- the position in the audio stream
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available through the tell() method, set through the
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setpos() method
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These variables are used internally only:
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_fmt_chunk_read -- 1 iff the FMT chunk has been read
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_data_seek_needed -- 1 iff positioned correctly in audio
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file for readframes()
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_data_chunk -- instantiation of a chunk class for the DATA chunk
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_framesize -- size of one frame in the file
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"""
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def initfp(self, file):
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self._convert = None
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self._soundpos = 0
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self._file = Chunk(file, bigendian=0)
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if self._file.getname() != b"RIFF":
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raise Error("file does not start with RIFF id")
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if self._file.read(4) != b"WAVE":
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raise Error("not a WAVE file")
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self._fmt_chunk_read = 0
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self._data_chunk = None
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while 1:
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self._data_seek_needed = 1
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try:
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chunk = Chunk(self._file, bigendian=0)
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except EOFError:
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break
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chunkname = chunk.getname()
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if chunkname == b"fmt ":
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self._read_fmt_chunk(chunk)
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self._fmt_chunk_read = 1
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elif chunkname == b"data":
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if not self._fmt_chunk_read:
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raise Error("data chunk before fmt chunk")
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self._data_chunk = chunk
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self._nframes = chunk.chunksize // self._framesize
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self._data_seek_needed = 0
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break
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chunk.skip()
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if not self._fmt_chunk_read or not self._data_chunk:
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raise Error("fmt chunk and/or data chunk missing")
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def __init__(self, f):
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self._i_opened_the_file = None
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if isinstance(f, str):
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f = builtins.open(f, "rb")
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self._i_opened_the_file = f
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# else, assume it is an open file object already
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try:
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self.initfp(f)
|
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except:
|
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if self._i_opened_the_file:
|
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f.close()
|
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raise
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|
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def __del__(self):
|
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self.close()
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|
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def __enter__(self):
|
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return self
|
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|
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def __exit__(self, *args):
|
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self.close()
|
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|
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#
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# User visible methods.
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#
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def getfp(self):
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return self._file
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def rewind(self):
|
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self._data_seek_needed = 1
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self._soundpos = 0
|
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|
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def close(self):
|
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self._file = None
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file = self._i_opened_the_file
|
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if file:
|
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self._i_opened_the_file = None
|
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file.close()
|
||||
|
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def tell(self):
|
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return self._soundpos
|
||||
|
||||
def getnchannels(self):
|
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return self._nchannels
|
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|
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def getnframes(self):
|
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return self._nframes
|
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|
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def getsampwidth(self):
|
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return self._sampwidth
|
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|
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def getframerate(self):
|
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return self._framerate
|
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|
||||
def getcomptype(self):
|
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return self._comptype
|
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|
||||
def getcompname(self):
|
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return self._compname
|
||||
|
||||
def getparams(self):
|
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return _wave_params(
|
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self.getnchannels(),
|
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self.getsampwidth(),
|
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self.getframerate(),
|
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self.getnframes(),
|
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self.getcomptype(),
|
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self.getcompname(),
|
||||
)
|
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|
||||
def getmarkers(self):
|
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return None
|
||||
|
||||
def getmark(self, id):
|
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raise Error("no marks")
|
||||
|
||||
def setpos(self, pos):
|
||||
if pos < 0 or pos > self._nframes:
|
||||
raise Error("position not in range")
|
||||
self._soundpos = pos
|
||||
self._data_seek_needed = 1
|
||||
|
||||
def readframes(self, nframes):
|
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if self._data_seek_needed:
|
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self._data_chunk.seek(0, 0)
|
||||
pos = self._soundpos * self._framesize
|
||||
if pos:
|
||||
self._data_chunk.seek(pos, 0)
|
||||
self._data_seek_needed = 0
|
||||
if nframes == 0:
|
||||
return b""
|
||||
data = self._data_chunk.read(nframes * self._framesize)
|
||||
if self._sampwidth != 1 and sys.byteorder == "big":
|
||||
data = audioop.byteswap(data, self._sampwidth)
|
||||
if self._convert and data:
|
||||
data = self._convert(data)
|
||||
self._soundpos = self._soundpos + len(data) // (self._nchannels * self._sampwidth)
|
||||
return data
|
||||
|
||||
#
|
||||
# Internal methods.
|
||||
#
|
||||
|
||||
def _read_fmt_chunk(self, chunk):
|
||||
try:
|
||||
(
|
||||
wFormatTag,
|
||||
self._nchannels,
|
||||
self._framerate,
|
||||
dwAvgBytesPerSec,
|
||||
wBlockAlign,
|
||||
) = struct.unpack_from("<HHLLH", chunk.read(14))
|
||||
except struct.error:
|
||||
raise EOFError from None
|
||||
if wFormatTag == WAVE_FORMAT_PCM:
|
||||
try:
|
||||
sampwidth = struct.unpack_from("<H", chunk.read(2))[0]
|
||||
except struct.error:
|
||||
raise EOFError from None
|
||||
self._sampwidth = (sampwidth + 7) // 8
|
||||
if not self._sampwidth:
|
||||
raise Error("bad sample width")
|
||||
else:
|
||||
raise Error("unknown format: %r" % (wFormatTag,))
|
||||
if not self._nchannels:
|
||||
raise Error("bad # of channels")
|
||||
self._framesize = self._nchannels * self._sampwidth
|
||||
self._comptype = "NONE"
|
||||
self._compname = "not compressed"
|
||||
|
||||
|
||||
class Wave_write:
|
||||
"""Variables used in this class:
|
||||
|
||||
These variables are user settable through appropriate methods
|
||||
of this class:
|
||||
_file -- the open file with methods write(), close(), tell(), seek()
|
||||
set through the __init__() method
|
||||
_comptype -- the AIFF-C compression type ('NONE' in AIFF)
|
||||
set through the setcomptype() or setparams() method
|
||||
_compname -- the human-readable AIFF-C compression type
|
||||
set through the setcomptype() or setparams() method
|
||||
_nchannels -- the number of audio channels
|
||||
set through the setnchannels() or setparams() method
|
||||
_sampwidth -- the number of bytes per audio sample
|
||||
set through the setsampwidth() or setparams() method
|
||||
_framerate -- the sampling frequency
|
||||
set through the setframerate() or setparams() method
|
||||
_nframes -- the number of audio frames written to the header
|
||||
set through the setnframes() or setparams() method
|
||||
|
||||
These variables are used internally only:
|
||||
_datalength -- the size of the audio samples written to the header
|
||||
_nframeswritten -- the number of frames actually written
|
||||
_datawritten -- the size of the audio samples actually written
|
||||
"""
|
||||
|
||||
def __init__(self, f):
|
||||
self._i_opened_the_file = None
|
||||
if isinstance(f, str):
|
||||
f = builtins.open(f, "wb")
|
||||
self._i_opened_the_file = f
|
||||
try:
|
||||
self.initfp(f)
|
||||
except:
|
||||
if self._i_opened_the_file:
|
||||
f.close()
|
||||
raise
|
||||
|
||||
def initfp(self, file):
|
||||
self._file = file
|
||||
self._convert = None
|
||||
self._nchannels = 0
|
||||
self._sampwidth = 0
|
||||
self._framerate = 0
|
||||
self._nframes = 0
|
||||
self._nframeswritten = 0
|
||||
self._datawritten = 0
|
||||
self._datalength = 0
|
||||
self._headerwritten = False
|
||||
|
||||
def __del__(self):
|
||||
self.close()
|
||||
|
||||
def __enter__(self):
|
||||
return self
|
||||
|
||||
def __exit__(self, *args):
|
||||
self.close()
|
||||
|
||||
#
|
||||
# User visible methods.
|
||||
#
|
||||
def setnchannels(self, nchannels):
|
||||
if self._datawritten:
|
||||
raise Error("cannot change parameters after starting to write")
|
||||
if nchannels < 1:
|
||||
raise Error("bad # of channels")
|
||||
self._nchannels = nchannels
|
||||
|
||||
def getnchannels(self):
|
||||
if not self._nchannels:
|
||||
raise Error("number of channels not set")
|
||||
return self._nchannels
|
||||
|
||||
def setsampwidth(self, sampwidth):
|
||||
if self._datawritten:
|
||||
raise Error("cannot change parameters after starting to write")
|
||||
if sampwidth < 1 or sampwidth > 4:
|
||||
raise Error("bad sample width")
|
||||
self._sampwidth = sampwidth
|
||||
|
||||
def getsampwidth(self):
|
||||
if not self._sampwidth:
|
||||
raise Error("sample width not set")
|
||||
return self._sampwidth
|
||||
|
||||
def setframerate(self, framerate):
|
||||
if self._datawritten:
|
||||
raise Error("cannot change parameters after starting to write")
|
||||
if framerate <= 0:
|
||||
raise Error("bad frame rate")
|
||||
self._framerate = int(round(framerate))
|
||||
|
||||
def getframerate(self):
|
||||
if not self._framerate:
|
||||
raise Error("frame rate not set")
|
||||
return self._framerate
|
||||
|
||||
def setnframes(self, nframes):
|
||||
if self._datawritten:
|
||||
raise Error("cannot change parameters after starting to write")
|
||||
self._nframes = nframes
|
||||
|
||||
def getnframes(self):
|
||||
return self._nframeswritten
|
||||
|
||||
def setcomptype(self, comptype, compname):
|
||||
if self._datawritten:
|
||||
raise Error("cannot change parameters after starting to write")
|
||||
if comptype not in ("NONE",):
|
||||
raise Error("unsupported compression type")
|
||||
self._comptype = comptype
|
||||
self._compname = compname
|
||||
|
||||
def getcomptype(self):
|
||||
return self._comptype
|
||||
|
||||
def getcompname(self):
|
||||
return self._compname
|
||||
|
||||
def setparams(self, params):
|
||||
nchannels, sampwidth, framerate, nframes, comptype, compname = params
|
||||
if self._datawritten:
|
||||
raise Error("cannot change parameters after starting to write")
|
||||
self.setnchannels(nchannels)
|
||||
self.setsampwidth(sampwidth)
|
||||
self.setframerate(framerate)
|
||||
self.setnframes(nframes)
|
||||
self.setcomptype(comptype, compname)
|
||||
|
||||
def getparams(self):
|
||||
if not self._nchannels or not self._sampwidth or not self._framerate:
|
||||
raise Error("not all parameters set")
|
||||
return _wave_params(
|
||||
self._nchannels,
|
||||
self._sampwidth,
|
||||
self._framerate,
|
||||
self._nframes,
|
||||
self._comptype,
|
||||
self._compname,
|
||||
)
|
||||
|
||||
def setmark(self, id, pos, name):
|
||||
raise Error("setmark() not supported")
|
||||
|
||||
def getmark(self, id):
|
||||
raise Error("no marks")
|
||||
|
||||
def getmarkers(self):
|
||||
return None
|
||||
|
||||
def tell(self):
|
||||
return self._nframeswritten
|
||||
|
||||
def writeframesraw(self, data):
|
||||
if not isinstance(data, (bytes, bytearray)):
|
||||
data = memoryview(data).cast("B")
|
||||
self._ensure_header_written(len(data))
|
||||
nframes = len(data) // (self._sampwidth * self._nchannels)
|
||||
if self._convert:
|
||||
data = self._convert(data)
|
||||
if self._sampwidth != 1 and sys.byteorder == "big":
|
||||
data = audioop.byteswap(data, self._sampwidth)
|
||||
self._file.write(data)
|
||||
self._datawritten += len(data)
|
||||
self._nframeswritten = self._nframeswritten + nframes
|
||||
|
||||
def writeframes(self, data):
|
||||
self.writeframesraw(data)
|
||||
if self._datalength != self._datawritten:
|
||||
self._patchheader()
|
||||
|
||||
def close(self):
|
||||
try:
|
||||
if self._file:
|
||||
self._ensure_header_written(0)
|
||||
if self._datalength != self._datawritten:
|
||||
self._patchheader()
|
||||
self._file.flush()
|
||||
finally:
|
||||
self._file = None
|
||||
file = self._i_opened_the_file
|
||||
if file:
|
||||
self._i_opened_the_file = None
|
||||
file.close()
|
||||
|
||||
#
|
||||
# Internal methods.
|
||||
#
|
||||
|
||||
def _ensure_header_written(self, datasize):
|
||||
if not self._headerwritten:
|
||||
if not self._nchannels:
|
||||
raise Error("# channels not specified")
|
||||
if not self._sampwidth:
|
||||
raise Error("sample width not specified")
|
||||
if not self._framerate:
|
||||
raise Error("sampling rate not specified")
|
||||
self._write_header(datasize)
|
||||
|
||||
def _write_header(self, initlength):
|
||||
assert not self._headerwritten
|
||||
self._file.write(b"RIFF")
|
||||
if not self._nframes:
|
||||
self._nframes = initlength // (self._nchannels * self._sampwidth)
|
||||
self._datalength = self._nframes * self._nchannels * self._sampwidth
|
||||
try:
|
||||
self._form_length_pos = self._file.tell()
|
||||
except (AttributeError, OSError):
|
||||
self._form_length_pos = None
|
||||
self._file.write(
|
||||
struct.pack(
|
||||
"<L4s4sLHHLLHH4s",
|
||||
36 + self._datalength,
|
||||
b"WAVE",
|
||||
b"fmt ",
|
||||
16,
|
||||
WAVE_FORMAT_PCM,
|
||||
self._nchannels,
|
||||
self._framerate,
|
||||
self._nchannels * self._framerate * self._sampwidth,
|
||||
self._nchannels * self._sampwidth,
|
||||
self._sampwidth * 8,
|
||||
b"data",
|
||||
)
|
||||
)
|
||||
if self._form_length_pos is not None:
|
||||
self._data_length_pos = self._file.tell()
|
||||
self._file.write(struct.pack("<L", self._datalength))
|
||||
self._headerwritten = True
|
||||
|
||||
def _patchheader(self):
|
||||
assert self._headerwritten
|
||||
if self._datawritten == self._datalength:
|
||||
return
|
||||
curpos = self._file.tell()
|
||||
self._file.seek(self._form_length_pos, 0)
|
||||
self._file.write(struct.pack("<L", 36 + self._datawritten))
|
||||
self._file.seek(self._data_length_pos, 0)
|
||||
self._file.write(struct.pack("<L", self._datawritten))
|
||||
self._file.seek(curpos, 0)
|
||||
self._datalength = self._datawritten
|
||||
|
||||
|
||||
def open(f, mode=None):
|
||||
if mode is None:
|
||||
if hasattr(f, "mode"):
|
||||
mode = f.mode
|
||||
else:
|
||||
mode = "rb"
|
||||
if mode in ("r", "rb"):
|
||||
return Wave_read(f)
|
||||
elif mode in ("w", "wb"):
|
||||
return Wave_write(f)
|
||||
else:
|
||||
raise Error("mode must be 'r', 'rb', 'w', or 'wb'")
|
||||
Loading…
Reference in New Issue
Block a user