Transform a numpy array to a PCM bytestring
(data, rate, normalize)
| 145 | |
| 146 | @staticmethod |
| 147 | def _make_wav(data, rate, normalize): |
| 148 | """ Transform a numpy array to a PCM bytestring """ |
| 149 | from io import BytesIO |
| 150 | import wave |
| 151 | |
| 152 | try: |
| 153 | scaled, nchan = Audio._validate_and_normalize_with_numpy(data, normalize) |
| 154 | except ImportError: |
| 155 | scaled, nchan = Audio._validate_and_normalize_without_numpy(data, normalize) |
| 156 | |
| 157 | fp = BytesIO() |
| 158 | waveobj = wave.open(fp,mode='wb') |
| 159 | waveobj.setnchannels(nchan) |
| 160 | waveobj.setframerate(rate) |
| 161 | waveobj.setsampwidth(2) |
| 162 | waveobj.setcomptype('NONE','NONE') |
| 163 | waveobj.writeframes(scaled) |
| 164 | val = fp.getvalue() |
| 165 | waveobj.close() |
| 166 | |
| 167 | return val |
| 168 | |
| 169 | @staticmethod |
| 170 | def _validate_and_normalize_with_numpy(data, normalize) -> Tuple[bytes, int]: |
no test coverage detected