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58 lines
1.9 KiB
Python
58 lines
1.9 KiB
Python
###########################################
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# Project: CMSIS DSP Library
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# Title: WavSink.py
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# Description: Sink node for creating a wav
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#
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#
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# Target Processor: Cortex-M and Cortex-A cores
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# -------------------------------------------------------------------- */
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#
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# Copyright (C) 2021-2023 ARM Limited or its affiliates. All rights reserved.
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#
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# SPDX-License-Identifier: Apache-2.0
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#
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# Licensed under the Apache License, Version 2.0 (the License); you may
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# not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an AS IS BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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############################################
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from ..simu import *
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import wave
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import struct
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# Mono with 16 bits encoding
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class WavSink(GenericSink):
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def __init__(self,inputSize,fifoin,name,matplotlibBuffer):
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GenericSink.__init__(self,inputSize,fifoin)
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self._bufPos=0
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self._buffer=matplotlibBuffer
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self._file = wave.open(name,'w')
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self._file.setnchannels(1) # mono
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self._file.setsampwidth(2)
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self._file.setframerate(16000)
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def run(self):
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b=self.getReadBuffer()
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nextPos = self._bufPos + self._inputSize
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if (nextPos <= self._buffer.size):
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# Save output to buffer defined in custom.py
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# and used to display result with matplotlib
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self._buffer[self._bufPos:self._bufPos+self._inputSize]=b[:]
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self._bufPos = nextPos
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for sample in b:
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data = struct.pack('<h', sample)
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self._file.writeframesraw( data )
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return(0)
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def __del__(self):
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self._file.close() |