| # Copyright 2014 The Chromium OS Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """This module provides the audio widgets used in audio tests.""" |
| |
| import abc |
| import copy |
| import logging |
| import os |
| import tempfile |
| |
| from autotest_lib.client.cros.audio import audio_data |
| from autotest_lib.client.cros.audio import audio_test_data |
| from autotest_lib.client.cros.audio import cras_configs |
| from autotest_lib.client.cros.audio import sox_utils |
| from autotest_lib.client.cros.chameleon import chameleon_audio_ids as ids |
| from autotest_lib.client.cros.chameleon import chameleon_port_finder |
| |
| |
| _CHAMELEON_FILE_PATH = os.path.join(os.path.dirname(__file__)) |
| |
| class AudioWidget(object): |
| """ |
| This class abstracts an audio widget in audio test framework. A widget |
| is identified by its audio port. The handler passed in at __init__ will |
| handle action on the audio widget. |
| |
| Properties: |
| audio_port: The AudioPort this AudioWidget resides in. |
| handler: The handler that handles audio action on the widget. It is |
| actually a (Chameleon/Cros)(Input/Output)WidgetHandler object. |
| |
| """ |
| def __init__(self, audio_port, handler): |
| """Initializes an AudioWidget on a AudioPort. |
| |
| @param audio_port: An AudioPort object. |
| @param handler: A WidgetHandler object which handles action on the widget. |
| |
| """ |
| self.audio_port = audio_port |
| self.handler = handler |
| |
| |
| @property |
| def port_id(self): |
| """Port id of this audio widget. |
| |
| @returns: A string. The port id defined in chameleon_audio_ids for this |
| audio widget. |
| """ |
| return self.audio_port.port_id |
| |
| |
| class AudioInputWidget(AudioWidget): |
| """ |
| This class abstracts an audio input widget. This class provides the audio |
| action that is available on an input audio port. |
| |
| Properties: |
| _remote_rec_path: The path to the recorded file on the remote host. |
| _rec_binary: The recorded binary data. |
| _rec_format: The recorded data format. A dict containing |
| file_type: 'raw' or 'wav'. |
| sample_format: 'S32_LE' for 32-bit signed integer in |
| little-endian. Refer to aplay manpage for |
| other formats. |
| channel: channel number. |
| rate: sampling rate. |
| |
| _channel_map: A list containing current channel map. Checks docstring |
| of channel_map method for details. |
| |
| """ |
| def __init__(self, *args, **kwargs): |
| """Initializes an AudioInputWidget.""" |
| super(AudioInputWidget, self).__init__(*args, **kwargs) |
| self._remote_rec_path = None |
| self._rec_binary = None |
| self._rec_format = None |
| self._channel_map = None |
| self._init_channel_map_without_link() |
| |
| |
| def start_recording(self): |
| """Starts recording.""" |
| self._remote_rec_path = None |
| self._rec_binary = None |
| self._rec_format = None |
| self.handler.start_recording() |
| |
| |
| def stop_recording(self): |
| """Stops recording.""" |
| self._remote_rec_path, self._rec_format = self.handler.stop_recording() |
| |
| |
| def read_recorded_binary(self): |
| """Gets recorded file from handler and fills _rec_binary.""" |
| self._rec_binary = self.handler.get_recorded_binary( |
| self._remote_rec_path, self._rec_format) |
| |
| |
| def save_file(self, file_path): |
| """Saves recorded data to a file. |
| |
| @param file_path: The path to save the file. |
| |
| """ |
| with open(file_path, 'wb') as f: |
| logging.debug('Saving recorded raw file to %s', file_path) |
| f.write(self._rec_binary) |
| |
| wav_file_path = file_path + '.wav' |
| logging.debug('Saving recorded wav file to %s', wav_file_path) |
| sox_utils.convert_raw_file( |
| path_src=file_path, |
| channels_src=self._channel, |
| rate_src=self._sampling_rate, |
| bits_src=self._sample_size_bits, |
| path_dst=wav_file_path) |
| |
| |
| def get_binary(self): |
| """Gets recorded binary data. |
| |
| @returns: The recorded binary data. |
| |
| """ |
| return self._rec_binary |
| |
| |
| @property |
| def data_format(self): |
| """The recorded data format. |
| |
| @returns: The recorded data format. |
| |
| """ |
| return self._rec_format |
| |
| |
| @property |
| def channel_map(self): |
| """The recorded data channel map. |
| |
| @returns: The recorded channel map. A list containing channel mapping. |
| E.g. [1, 0, None, None, None, None, None, None] means |
| channel 0 of recorded data should be mapped to channel 1 of |
| data played to the recorder. Channel 1 of recorded data should |
| be mapped to channel 0 of data played to recorder. |
| Channel 2 to 7 of recorded data should be ignored. |
| |
| """ |
| return self._channel_map |
| |
| |
| @channel_map.setter |
| def channel_map(self, new_channel_map): |
| """Sets channel map. |
| |
| @param new_channel_map: A list containing new channel map. |
| |
| """ |
| self._channel_map = copy.deepcopy(new_channel_map) |
| |
| |
| def _init_channel_map_without_link(self): |
| """Initializes channel map without WidgetLink. |
| |
| WidgetLink sets channel map to a sink widget when the link combines |
| a source widget to a sink widget. For simple cases like internal |
| microphone on Cros device, or Mic port on Chameleon, the audio signal |
| is over the air, so we do not use link to combine the source to |
| the sink. We just set a default channel map in this case. |
| |
| """ |
| if self.port_id in [ids.ChameleonIds.MIC, ids.CrosIds.INTERNAL_MIC]: |
| self._channel_map = [0] |
| |
| |
| @property |
| def _sample_size_bytes(self): |
| """Gets sample size in bytes of recorded data.""" |
| return audio_data.SAMPLE_FORMATS[ |
| self._rec_format['sample_format']]['size_bytes'] |
| |
| |
| @property |
| def _sample_size_bits(self): |
| """Gets sample size in bits of recorded data.""" |
| return self._sample_size_bytes * 8 |
| |
| |
| @property |
| def _channel(self): |
| """Gets number of channels of recorded data.""" |
| return self._rec_format['channel'] |
| |
| |
| @property |
| def _sampling_rate(self): |
| """Gets sampling rate of recorded data.""" |
| return self._rec_format['rate'] |
| |
| |
| def remove_head(self, duration_secs): |
| """Removes a duration of recorded data from head. |
| |
| @param duration_secs: The duration in seconds to be removed from head. |
| |
| """ |
| offset = int(self._sampling_rate * duration_secs * |
| self._sample_size_bytes * self._channel) |
| self._rec_binary = self._rec_binary[offset:] |
| |
| |
| def lowpass_filter(self, frequency): |
| """Passes the recorded data to a lowpass filter. |
| |
| @param frequency: The 3dB frequency of lowpass filter. |
| |
| """ |
| with tempfile.NamedTemporaryFile( |
| prefix='original_') as original_file: |
| with tempfile.NamedTemporaryFile( |
| prefix='filtered_') as filtered_file: |
| |
| original_file.write(self._rec_binary) |
| original_file.flush() |
| |
| sox_utils.lowpass_filter( |
| original_file.name, self._channel, |
| self._sample_size_bits, self._sampling_rate, |
| filtered_file.name, frequency) |
| |
| self._rec_binary = filtered_file.read() |
| |
| |
| class AudioOutputWidget(AudioWidget): |
| """ |
| This class abstracts an audio output widget. This class provides the audio |
| action that is available on an output audio port. |
| |
| """ |
| def __init__(self, *args, **kwargs): |
| """Initializes an AudioOutputWidget.""" |
| super(AudioOutputWidget, self).__init__(*args, **kwargs) |
| self._remote_playback_path = None |
| |
| |
| def set_playback_data(self, test_data): |
| """Sets data to play. |
| |
| Sets the data to play in the handler and gets the remote file path. |
| |
| @param test_data: An AudioTestData object. |
| |
| """ |
| self._remote_playback_path = self.handler.set_playback_data(test_data) |
| |
| |
| def start_playback(self, blocking=False): |
| """Starts playing audio specified in previous set_playback_data call. |
| |
| @param blocking: Blocks this call until playback finishes. |
| |
| """ |
| self.handler.start_playback(self._remote_playback_path, blocking) |
| |
| |
| def stop_playback(self): |
| """Stops playing audio.""" |
| self.handler.stop_playback() |
| |
| |
| class WidgetHandler(object): |
| """This class abstracts handler for basic actions on widget.""" |
| __metaclass__ = abc.ABCMeta |
| |
| @abc.abstractmethod |
| def plug(self): |
| """Plug this widget.""" |
| pass |
| |
| |
| @abc.abstractmethod |
| def unplug(self): |
| """Unplug this widget.""" |
| pass |
| |
| |
| class ChameleonWidgetHandler(WidgetHandler): |
| """ |
| This class abstracts a Chameleon audio widget handler. |
| |
| Properties: |
| interface: A string that represents the interface name on |
| Chameleon, e.g. 'HDMI', 'LineIn', 'LineOut'. |
| scale: The scale is the scaling factor to be applied on the data of the |
| widget before playing or after recording. |
| _chameleon_board: A ChameleonBoard object to control Chameleon. |
| _port: A ChameleonPort object to control port on Chameleon. |
| |
| """ |
| # The mic port on chameleon has a small gain. We need to scale |
| # the recorded value up, otherwise, the recorded value will be |
| # too small and will be falsely judged as not meaningful in the |
| # processing, even when the recorded audio is clear. |
| _DEFAULT_MIC_SCALE = 50.0 |
| |
| def __init__(self, chameleon_board, interface): |
| """Initializes a ChameleonWidgetHandler. |
| |
| @param chameleon_board: A ChameleonBoard object. |
| @param interface: A string that represents the interface name on |
| Chameleon, e.g. 'HDMI', 'LineIn', 'LineOut'. |
| |
| """ |
| self.interface = interface |
| self._chameleon_board = chameleon_board |
| self._port = self._find_port(interface) |
| self.scale = None |
| self._init_scale_without_link() |
| |
| |
| @abc.abstractmethod |
| def _find_port(self, interface): |
| """Finds the port by interface.""" |
| pass |
| |
| |
| def plug(self): |
| """Plugs this widget.""" |
| self._port.plug() |
| |
| |
| def unplug(self): |
| """Unplugs this widget.""" |
| self._port.unplug() |
| |
| |
| def _init_scale_without_link(self): |
| """Initializes scale for widget handler not used with link. |
| |
| Audio widget link sets scale when it connects two audio widgets. |
| For audio widget not used with link, e.g. Mic on Chameleon, we set |
| a default scale here. |
| |
| """ |
| if self.interface == 'Mic': |
| self.scale = self._DEFAULT_MIC_SCALE |
| |
| |
| class ChameleonInputWidgetHandler(ChameleonWidgetHandler): |
| """ |
| This class abstracts a Chameleon audio input widget handler. |
| |
| """ |
| def start_recording(self): |
| """Starts recording.""" |
| self._port.start_capturing_audio() |
| |
| |
| def stop_recording(self): |
| """Stops recording. |
| |
| Gets remote recorded path and format from Chameleon. The format can |
| then be used in get_recorded_binary() |
| |
| @returns: A tuple (remote_path, data_format) for recorded data. |
| Refer to stop_capturing_audio call of ChameleonAudioInput. |
| |
| """ |
| return self._port.stop_capturing_audio() |
| |
| |
| def get_recorded_binary(self, remote_path, record_format): |
| """Gets remote recorded file binary. |
| |
| Reads file from Chameleon host and handles scale if needed. |
| |
| @param remote_path: The path to the recorded file on Chameleon. |
| @param record_format: The recorded data format. A dict containing |
| file_type: 'raw' or 'wav'. |
| sample_format: 'S32_LE' for 32-bit signed integer in |
| little-endian. Refer to aplay manpage for |
| other formats. |
| channel: channel number. |
| rate: sampling rate. |
| |
| @returns: The recorded binary. |
| |
| """ |
| with tempfile.NamedTemporaryFile(prefix='recorded_') as f: |
| self._chameleon_board.host.get_file(remote_path, f.name) |
| |
| # Handles scaling using audio_test_data. |
| test_data = audio_test_data.AudioTestData(record_format, f.name) |
| converted_test_data = test_data.convert(record_format, self.scale) |
| try: |
| return converted_test_data.get_binary() |
| finally: |
| converted_test_data.delete() |
| |
| |
| def _find_port(self, interface): |
| """Finds a Chameleon audio port by interface(port name). |
| |
| @param interface: string, the interface. e.g: HDMI. |
| |
| @returns: A ChameleonPort object. |
| |
| @raises: ValueError if port is not connected. |
| |
| """ |
| finder = chameleon_port_finder.ChameleonAudioInputFinder( |
| self._chameleon_board) |
| chameleon_port = finder.find_port(interface) |
| if not chameleon_port: |
| raise ValueError( |
| 'Port %s is not connected to Chameleon' % interface) |
| return chameleon_port |
| |
| |
| class ChameleonHDMIInputWidgetHandlerError(Exception): |
| """Error in ChameleonHDMIInputWidgetHandler.""" |
| |
| |
| class ChameleonHDMIInputWidgetHandler(ChameleonInputWidgetHandler): |
| """This class abstracts a Chameleon HDMI audio input widget handler.""" |
| _EDID_FILE_PATH = os.path.join( |
| _CHAMELEON_FILE_PATH, 'test_data/edids/HDMI_DELL_U2410.txt') |
| |
| def __init__(self, chameleon_board, interface, display_facade): |
| """Initializes a ChameleonHDMIInputWidgetHandler. |
| |
| @param chameleon_board: Pass to ChameleonInputWidgetHandler. |
| @param interface: Pass to ChameleonInputWidgetHandler. |
| @param display_facade: A DisplayFacadeRemoteAdapter to access |
| Cros device display functionality. |
| |
| """ |
| super(ChameleonHDMIInputWidgetHandler, self).__init__( |
| chameleon_board, interface) |
| self._display_facade = display_facade |
| self._hdmi_video_port = None |
| |
| self._find_video_port() |
| |
| |
| def _find_video_port(self): |
| """Finds HDMI as a video port.""" |
| finder = chameleon_port_finder.ChameleonVideoInputFinder( |
| self._chameleon_board, self._display_facade) |
| self._hdmi_video_port = finder.find_port(self.interface) |
| if not self._hdmi_video_port: |
| raise ChameleonHDMIInputWidgetHandlerError( |
| 'Can not find HDMI port, perhaps HDMI is not connected?') |
| |
| |
| def set_edid_for_audio(self): |
| """Sets the EDID suitable for audio test.""" |
| self._hdmi_video_port.set_edid_from_file(self._EDID_FILE_PATH) |
| |
| |
| def restore_edid(self): |
| """Restores the original EDID.""" |
| self._hdmi_video_port.restore_edid() |
| |
| |
| class ChameleonOutputWidgetHandler(ChameleonWidgetHandler): |
| """ |
| This class abstracts a Chameleon audio output widget handler. |
| |
| """ |
| def __init__(self, *args, **kwargs): |
| """Initializes an ChameleonOutputWidgetHandler.""" |
| super(ChameleonOutputWidgetHandler, self).__init__(*args, **kwargs) |
| self._test_data_for_chameleon_format = None |
| |
| |
| def set_playback_data(self, test_data): |
| """Sets data to play. |
| |
| Handles scale if needed. Creates a path and sends the scaled data to |
| Chameleon at that path. |
| |
| @param test_data: An AudioTestData object. |
| |
| @return: The remote data path on Chameleon. |
| |
| """ |
| self._test_data_for_chameleon_format = test_data.data_format |
| return self._scale_and_send_playback_data(test_data) |
| |
| |
| def _scale_and_send_playback_data(self, test_data): |
| """Sets data to play on Chameleon. |
| |
| Creates a path and sends the scaled test data to Chameleon at that path. |
| |
| @param test_data: An AudioTestData object. |
| |
| @return: The remote data path on Chameleon. |
| |
| """ |
| test_data_for_chameleon = test_data.convert( |
| self._test_data_for_chameleon_format, self.scale) |
| |
| try: |
| with tempfile.NamedTemporaryFile(prefix='audio_') as f: |
| self._chameleon_board.host.send_file( |
| test_data_for_chameleon.path, f.name) |
| return f.name |
| finally: |
| test_data_for_chameleon.delete() |
| |
| |
| def start_playback(self, path, blocking=False): |
| """Starts playback. |
| |
| @param path: The path to the file to play on Chameleon. |
| @param blocking: Blocks this call until playback finishes. |
| |
| """ |
| if blocking: |
| raise NotImplementedError( |
| 'Blocking playback on chameleon is not supported') |
| |
| self._port.start_playing_audio( |
| path, self._test_data_for_chameleon_format) |
| |
| |
| def stop_playback(self): |
| """Stops playback.""" |
| self._port.stop_playing_audio() |
| |
| |
| def _find_port(self, interface): |
| """Finds a Chameleon audio port by interface(port name). |
| |
| @param interface: string, the interface. e.g: LineOut. |
| |
| @returns: A ChameleonPort object. |
| |
| @raises: ValueError if port is not connected. |
| |
| """ |
| finder = chameleon_port_finder.ChameleonAudioOutputFinder( |
| self._chameleon_board) |
| chameleon_port = finder.find_port(interface) |
| if not chameleon_port: |
| raise ValueError( |
| 'Port %s is not connected to Chameleon' % interface) |
| return chameleon_port |
| |
| |
| class ChameleonLineOutOutputWidgetHandler(ChameleonOutputWidgetHandler): |
| """ |
| This class abstracts a Chameleon usb audio output widget handler. |
| |
| """ |
| |
| _DEFAULT_DATA_FORMAT = dict(file_type='raw', |
| sample_format='S32_LE', |
| channel=8, |
| rate=48000) |
| |
| def set_playback_data(self, test_data): |
| """Sets data to play. |
| |
| Handles scale if needed. Creates a path and sends the scaled data to |
| Chameleon at that path. |
| |
| @param test_data: An AudioTestData object. |
| |
| @return: The remote data path on Chameleon. |
| |
| """ |
| self._test_data_for_chameleon_format = self._DEFAULT_DATA_FORMAT |
| return self._scale_and_send_playback_data(test_data) |
| |
| |
| |
| class CrosWidgetHandler(WidgetHandler): |
| """ |
| This class abstracts a Cros device audio widget handler. |
| |
| Properties: |
| _audio_facade: An AudioFacadeRemoteAdapter to access Cros device |
| audio functionality. |
| _plug_handler: A PlugHandler for performing plug and unplug. |
| |
| """ |
| def __init__(self, audio_facade, plug_handler): |
| """Initializes a CrosWidgetHandler. |
| |
| @param audio_facade: An AudioFacadeRemoteAdapter to access Cros device |
| audio functionality. |
| @param plug_handler: A PlugHandler object for plug and unplug. |
| |
| """ |
| self._audio_facade = audio_facade |
| self._plug_handler = plug_handler |
| |
| |
| def plug(self): |
| """Plugs this widget.""" |
| logging.info('CrosWidgetHandler: plug') |
| self._plug_handler.plug() |
| |
| |
| def unplug(self): |
| """Unplugs this widget.""" |
| logging.info('CrosWidgetHandler: unplug') |
| self._plug_handler.unplug() |
| |
| |
| class PlugHandler(object): |
| """This class abstracts plug/unplug action for widgets on Cros device. |
| |
| This class will be used by CrosWidgetHandler when performinng plug/unplug. |
| |
| """ |
| def __init__(self): |
| """Initializes a PlugHandler.""" |
| |
| |
| def plug(self): |
| """Plugs in the widget/device.""" |
| raise NotImplementedError('plug() not implemented.') |
| |
| |
| def unplug(self): |
| """Unplugs the widget/device.""" |
| raise NotImplementedError('unplug() not implemented.') |
| |
| |
| class DummyPlugHandler(PlugHandler): |
| """A dummy class that does not do anything for plug() or unplug(). |
| |
| This class can be used by Cros widgets that have alternative ways of |
| performing plug and unplug. |
| |
| """ |
| |
| def plug(self): |
| """Does nothing for plug.""" |
| logging.info('DummyPlugHandler: plug') |
| |
| |
| def unplug(self): |
| """Does nothing for unplug.""" |
| logging.info('DummyPlugHandler: unplug') |
| |
| |
| class JackPluggerPlugHandler(PlugHandler): |
| """This class abstracts plug/unplug action with motor on Cros device. |
| |
| Properties: |
| _jack_plugger: A JackPlugger object to access the jack plugger robot |
| |
| """ |
| |
| def __init__(self, jack_plugger): |
| """Initializes a JackPluggerPlugHandler. |
| |
| @param jack_plugger: A JackPlugger object |
| """ |
| self._jack_plugger = jack_plugger |
| |
| |
| def plug(self): |
| """plugs in the jack to the cros device.""" |
| self._jack_plugger.plug() |
| |
| |
| def unplug(self): |
| """Unplugs the jack from the cros device.""" |
| self._jack_plugger.unplug() |
| |
| |
| class CrosInputWidgetHandlerError(Exception): |
| """Error in CrosInputWidgetHandler.""" |
| |
| |
| class CrosInputWidgetHandler(CrosWidgetHandler): |
| """ |
| This class abstracts a Cros device audio input widget handler. |
| |
| """ |
| _DEFAULT_DATA_FORMAT = dict(file_type='raw', |
| sample_format='S16_LE', |
| channel=1, |
| rate=48000) |
| |
| def start_recording(self): |
| """Starts recording audio.""" |
| self._audio_facade.start_recording(self._DEFAULT_DATA_FORMAT) |
| |
| |
| def stop_recording(self): |
| """Stops recording audio. |
| |
| @returns: |
| A tuple (remote_path, format). |
| remote_path: The path to the recorded file on Cros device. |
| format: A dict containing: |
| file_type: 'raw'. |
| sample_format: 'S16_LE' for 16-bit signed integer in |
| little-endian. |
| channel: channel number. |
| rate: sampling rate. |
| |
| """ |
| return self._audio_facade.stop_recording(), self._DEFAULT_DATA_FORMAT |
| |
| |
| def get_recorded_binary(self, remote_path, record_format): |
| """Gets remote recorded file binary. |
| |
| Gets and reads recorded file from Cros device. |
| |
| @param remote_path: The path to the recorded file on Cros device. |
| @param record_format: The recorded data format. A dict containing |
| file_type: 'raw' or 'wav'. |
| sample_format: 'S32_LE' for 32-bit signed integer in |
| little-endian. Refer to aplay manpage for |
| other formats. |
| channel: channel number. |
| rate: sampling rate. |
| |
| @returns: The recorded binary. |
| |
| @raises: CrosInputWidgetHandlerError if record_format is not correct. |
| """ |
| if record_format != self._DEFAULT_DATA_FORMAT: |
| raise CrosInputWidgetHandlerError( |
| 'Record format %r is not valid' % record_format) |
| |
| with tempfile.NamedTemporaryFile(prefix='recorded_') as f: |
| self._audio_facade.get_recorded_file(remote_path, f.name) |
| return open(f.name).read() |
| |
| |
| class CrosUSBInputWidgetHandler(CrosInputWidgetHandler): |
| """ |
| This class abstracts a Cros device audio input widget handler. |
| |
| """ |
| _DEFAULT_DATA_FORMAT = dict(file_type='raw', |
| sample_format='S16_LE', |
| channel=2, |
| rate=48000) |
| |
| |
| class CrosIntMicInputWidgetHandler(CrosInputWidgetHandler): |
| """ |
| This class abstracts a Cros device audio input widget handler on int mic. |
| |
| """ |
| def __init__(self, audio_facade, plug_handler, system_facade): |
| """Initializes a CrosWidgetHandler. |
| |
| @param audio_facade: An AudioFacadeRemoteAdapter to access Cros device |
| audio functionality. |
| @param plug_handler: A PlugHandler object for plug and unplug. |
| @param system_facade: A SystemFacadeRemoteAdapter to access Cros device |
| audio functionality. |
| |
| """ |
| super(CrosIntMicInputWidgetHandler, self).__init__( |
| audio_facade, plug_handler) |
| self._system_facade = system_facade |
| |
| |
| def set_proper_gain(self): |
| """Sets a proper gain. |
| |
| On some boards, the default gain is too high. It relies on automatic |
| gain control in application level to adjust the gain. Since there is no |
| automatic gain control in the test, we set a proper gain before |
| recording. |
| |
| """ |
| board = self._system_facade.get_current_board() |
| proper_gain = cras_configs.get_proper_internal_mic_gain(board) |
| |
| if proper_gain is None: |
| logging.debug('No proper gain for %s', board) |
| return |
| |
| logging.debug('Set gain to %f dB on internal mic for %s ', |
| proper_gain / 100, board) |
| self._audio_facade.set_input_gain(proper_gain) |
| |
| |
| def start_recording(self): |
| """Starts recording audio with proper gain.""" |
| self.set_proper_gain() |
| self._audio_facade.start_recording(self._DEFAULT_DATA_FORMAT) |
| |
| |
| class CrosHotwordingWidgetHandler(CrosInputWidgetHandler): |
| """ |
| This class abstracts a Cros device audio input widget handler on hotwording. |
| |
| """ |
| _DEFAULT_DATA_FORMAT = dict(file_type='raw', |
| sample_format='S16_LE', |
| channel=1, |
| rate=16000) |
| |
| def __init__(self, audio_facade, plug_handler, system_facade): |
| """Initializes a CrosWidgetHandler. |
| |
| @param audio_facade: An AudioFacadeRemoteAdapter to access Cros device |
| audio functionality. |
| @param plug_handler: A PlugHandler object for plug and unplug. |
| @param system_facade: A SystemFacadeRemoteAdapter to access Cros device |
| system functionality. |
| |
| """ |
| super(CrosHotwordingWidgetHandler, self).__init__( |
| audio_facade, plug_handler) |
| self._system_facade = system_facade |
| |
| |
| def start_listening(self): |
| """Start listening to hotword.""" |
| self._audio_facade.start_listening(self._DEFAULT_DATA_FORMAT) |
| |
| |
| def stop_listening(self): |
| """Stops listening to hotword.""" |
| return self._audio_facade.stop_listening(), self._DEFAULT_DATA_FORMAT |
| |
| |
| class CrosOutputWidgetHandlerError(Exception): |
| """The error in CrosOutputWidgetHandler.""" |
| pass |
| |
| |
| class CrosOutputWidgetHandler(CrosWidgetHandler): |
| """ |
| This class abstracts a Cros device audio output widget handler. |
| |
| """ |
| _DEFAULT_DATA_FORMAT = dict(file_type='raw', |
| sample_format='S16_LE', |
| channel=2, |
| rate=48000) |
| |
| def set_playback_data(self, test_data): |
| """Sets data to play. |
| |
| @param test_data: An AudioTestData object. |
| |
| @returns: The remote file path on Cros device. |
| |
| """ |
| # TODO(cychiang): Do format conversion on Cros device if this is |
| # needed. |
| if test_data.data_format != self._DEFAULT_DATA_FORMAT: |
| raise CrosOutputWidgetHandlerError( |
| 'File format conversion for cros device is not supported.') |
| return self._audio_facade.set_playback_file(test_data.path) |
| |
| |
| def start_playback(self, path, blocking=False): |
| """Starts playing audio. |
| |
| @param path: The path to the file to play on Cros device. |
| @param blocking: Blocks this call until playback finishes. |
| |
| """ |
| self._audio_facade.playback(path, self._DEFAULT_DATA_FORMAT, blocking) |
| |
| |
| def stop_playback(self): |
| """Stops playing audio.""" |
| self._audio_facade.stop_playback() |
| |
| |
| class PeripheralWidgetHandler(object): |
| """ |
| This class abstracts an action handler on peripheral. |
| Currently, as there is no action to take on the peripheral speaker and mic, |
| this class serves as a place-holder. |
| |
| """ |
| pass |
| |
| |
| class PeripheralWidget(AudioWidget): |
| """ |
| This class abstracts a peripheral widget which only acts passively like |
| peripheral speaker or microphone, or acts transparently like bluetooth |
| module on audio board which relays the audio siganl between Chameleon board |
| and Cros device. This widget does not provide playback/record function like |
| AudioOutputWidget or AudioInputWidget. The main purpose of this class is |
| an identifier to find the correct AudioWidgetLink to do the real work. |
| """ |
| pass |