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Robot Localization
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This class can be used to play a .wav file of your choice on a speaker of your choice and record simultaneously the response from 1 or more microphones. More...
Public Member Functions | |
| def | get_bytes_width (self, wf_out) |
| Returns wavfile byte width from its datatype. | |
| def | play_and_record (self) |
| Plays input file and records output channels. More... | |
| def | play_and_record_long (self) |
| Plays input file and records output channels, recording longer than input file is. More... | |
| def | save_wav_files (self, frames) |
| Saves frames in audio files. More... | |
| def | get_device_index (self, p) |
| Updates the audio device id to be used based on user input. More... | |
This class can be used to play a .wav file of your choice on a speaker of your choice and record simultaneously the response from 1 or more microphones.
The source and all microphones must be connected to a soundcard which is connected to your computer. (Or use your computer as a soundcard directly)
For each microphone channel, a output .wav-file is created.
Members:
input_file = path to .wav file to be played (sine sweep or other)
output_file = path to new file where data results are stored (with or without .wav ending)
[channels] = number of channels to be recorded (1 by default) the channels will be recorded in ascending order from 0 to n_channels-1 all channels will be saved in separate files (output_file0,1,2,...)
[index] = index of audio device to use (3 by default)
[rate] = sampling frequency in Hz (44100 by default)
[chunk] = chunk size (frames per buffer, 1024 by default)
[format_au] = format of output, in pyaudio.pa... notation (default: pyaudio.paInt16)
[format_np] = format of output, in numpy.... notation (default: np.int16)
| def Audio.Audio.get_device_index | ( | self, | |
| p | |||
| ) |
Updates the audio device id to be used based on user input.
Parameters: the audio-manager created with pyaudio
Returns: Nothing
| def Audio.Audio.play_and_record | ( | self | ) |
Plays input file and records output channels.
Same as play_and_record_long() but recording time is only as long as inputfile.
| def Audio.Audio.play_and_record_long | ( | self | ) |
Plays input file and records output channels, recording longer than input file is.
Returns:
frames, a list with #BUFFER elements (#BUFFER ~= Time of input_file * rate / chunk), each element is one frame with number of elements chunk*channels. The samples for different channels are stored in alternating order. (for channels x and o, one frame would be [xoxo ... xo])
if self.channels=1, each element of frames is one long string.
if self.channels>1, each element of frames is a list of format format_np.
| def Audio.Audio.save_wav_files | ( | self, | |
| frames | |||
| ) |
Saves frames in audio files.
Parameters:
frames, a list of #BUFFER elements, each element is one frame. (see output of play_and_record() for more details)
Returns: 1 if succeeded
1.8.11 
