Transform a numpy array to a PCM bytestring
(data, rate, normalize)
| 129 | |
| 130 | @staticmethod |
| 131 | def _make_wav(data, rate, normalize): |
| 132 | """ Transform a numpy array to a PCM bytestring """ |
| 133 | from io import BytesIO |
| 134 | import wave |
| 135 | |
| 136 | try: |
| 137 | scaled, nchan = Audio._validate_and_normalize_with_numpy(data, normalize) |
| 138 | except ImportError: |
| 139 | scaled, nchan = Audio._validate_and_normalize_without_numpy(data, normalize) |
| 140 | |
| 141 | fp = BytesIO() |
| 142 | waveobj = wave.open(fp,mode='wb') |
| 143 | waveobj.setnchannels(nchan) |
| 144 | waveobj.setframerate(rate) |
| 145 | waveobj.setsampwidth(2) |
| 146 | waveobj.setcomptype('NONE','NONE') |
| 147 | waveobj.writeframes(scaled) |
| 148 | val = fp.getvalue() |
| 149 | waveobj.close() |
| 150 | |
| 151 | return val |
| 152 | |
| 153 | @staticmethod |
| 154 | def _validate_and_normalize_with_numpy(data, normalize): |
no test coverage detected