| # Copyright (c) 2013 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| import re |
| import shlex |
| |
| from autotest_lib.client.cros.audio import cmd_utils |
| |
| |
| ARECORD_PATH = '/usr/bin/arecord' |
| APLAY_PATH = '/usr/bin/aplay' |
| AMIXER_PATH = '/usr/bin/amixer' |
| CARD_NUM_RE = re.compile('(\d+) \[.*\]:.*') |
| DEV_NUM_RE = re.compile('.* \[.*\], device (\d+):.*') |
| CONTROL_NAME_RE = re.compile("name='(.*)'") |
| SCONTROL_NAME_RE = re.compile("Simple mixer control '(.*)'") |
| |
| |
| def _get_format_args(channels, bits, rate): |
| args = ['-c', str(channels)] |
| args += ['-f', 'S%d_LE' % bits] |
| args += ['-r', str(rate)] |
| return args |
| |
| |
| def get_num_soundcards(): |
| '''Returns the number of soundcards. |
| |
| Number of soundcards is parsed from /proc/asound/cards. |
| Sample content: |
| |
| 0 [PCH ]: HDA-Intel - HDA Intel PCH |
| HDA Intel PCH at 0xef340000 irq 103 |
| 1 [NVidia ]: HDA-Intel - HDA NVidia |
| HDA NVidia at 0xef080000 irq 36 |
| ''' |
| |
| card_id = None |
| with open('/proc/asound/cards', 'r') as f: |
| for line in f: |
| match = CARD_NUM_RE.search(line) |
| if match: |
| card_id = int(match.group(1)) |
| if card_id is None: |
| return 0 |
| else: |
| return card_id + 1 |
| |
| |
| def _get_soundcard_controls(card_id): |
| '''Gets the controls for a soundcard. |
| |
| @param card_id: Soundcard ID. |
| @raise RuntimeError: If failed to get soundcard controls. |
| |
| Controls for a soundcard is retrieved by 'amixer controls' command. |
| amixer output format: |
| |
| numid=32,iface=CARD,name='Front Headphone Jack' |
| numid=28,iface=CARD,name='Front Mic Jack' |
| numid=1,iface=CARD,name='HDMI/DP,pcm=3 Jack' |
| numid=8,iface=CARD,name='HDMI/DP,pcm=7 Jack' |
| |
| Controls with iface=CARD are parsed from the output and returned in a set. |
| ''' |
| |
| cmd = AMIXER_PATH + ' -c %d controls' % card_id |
| p = cmd_utils.popen(shlex.split(cmd), stdout=cmd_utils.PIPE) |
| output, _ = p.communicate() |
| if p.wait() != 0: |
| raise RuntimeError('amixer command failed') |
| |
| controls = set() |
| for line in output.splitlines(): |
| if not 'iface=CARD' in line: |
| continue |
| match = CONTROL_NAME_RE.search(line) |
| if match: |
| controls.add(match.group(1)) |
| return controls |
| |
| |
| def _get_soundcard_scontrols(card_id): |
| '''Gets the simple mixer controls for a soundcard. |
| |
| @param card_id: Soundcard ID. |
| @raise RuntimeError: If failed to get soundcard simple mixer controls. |
| |
| Simple mixer controls for a soundcard is retrieved by 'amixer scontrols' |
| command. amixer output format: |
| |
| Simple mixer control 'Master',0 |
| Simple mixer control 'Headphone',0 |
| Simple mixer control 'Speaker',0 |
| Simple mixer control 'PCM',0 |
| |
| Simple controls are parsed from the output and returned in a set. |
| ''' |
| |
| cmd = AMIXER_PATH + ' -c %d scontrols' % card_id |
| p = cmd_utils.popen(shlex.split(cmd), stdout=cmd_utils.PIPE) |
| output, _ = p.communicate() |
| if p.wait() != 0: |
| raise RuntimeError('amixer command failed') |
| |
| scontrols = set() |
| for line in output.splitlines(): |
| match = SCONTROL_NAME_RE.findall(line) |
| if match: |
| scontrols.add(match[0]) |
| return scontrols |
| |
| |
| def get_first_soundcard_with_control(cname, scname): |
| '''Returns the soundcard ID with matching control name. |
| |
| @param cname: Control name to look for. |
| @param scname: Simple control name to look for. |
| ''' |
| |
| cpat = re.compile(r'\b%s\b' % cname, re.IGNORECASE) |
| scpat = re.compile(r'\b%s\b' % scname, re.IGNORECASE) |
| for card_id in xrange(get_num_soundcards()): |
| for pat, func in [(cpat, _get_soundcard_controls), |
| (scpat, _get_soundcard_scontrols)]: |
| if any(pat.search(c) for c in func(card_id)): |
| return card_id |
| return None |
| |
| |
| def get_default_playback_device(): |
| '''Gets the first playback device. |
| |
| Returns the first playback device or None if it fails to find one. |
| ''' |
| |
| card_id = get_first_soundcard_with_control(cname='Headphone Jack', |
| scname='Headphone') |
| if card_id is None: |
| return None |
| return 'plughw:%d' % card_id |
| |
| |
| def get_default_record_device(): |
| '''Gets the first record device. |
| |
| Returns the first record device or None if it fails to find one. |
| ''' |
| |
| card_id = get_first_soundcard_with_control(cname='Mic Jack', scname='Mic') |
| if card_id is None: |
| return None |
| |
| # Get first device id of this card. |
| cmd = ARECORD_PATH + ' -l' |
| p = cmd_utils.popen(shlex.split(cmd), stdout=cmd_utils.PIPE) |
| output, _ = p.communicate() |
| if p.wait() != 0: |
| raise RuntimeError('arecord -l command failed') |
| |
| dev_id = 0 |
| for line in output.splitlines(): |
| if 'card %d:' % card_id in line: |
| match = DEV_NUM_RE.search(line) |
| if match: |
| dev_id = int(match.group(1)) |
| break |
| return 'plughw:%d,%d' % (card_id, dev_id) |
| |
| |
| def _get_sysdefault(cmd): |
| p = cmd_utils.popen(shlex.split(cmd), stdout=cmd_utils.PIPE) |
| output, _ = p.communicate() |
| if p.wait() != 0: |
| raise RuntimeError('%s failed' % cmd) |
| |
| for line in output.splitlines(): |
| if 'sysdefault' in line: |
| return line |
| return None |
| |
| |
| def get_sysdefault_playback_device(): |
| '''Gets the sysdefault device from aplay -L output.''' |
| |
| return _get_sysdefault(APLAY_PATH + ' -L') |
| |
| |
| def get_sysdefault_record_device(): |
| '''Gets the sysdefault device from arecord -L output.''' |
| |
| return _get_sysdefault(ARECORD_PATH + ' -L') |
| |
| |
| def playback(*args, **kwargs): |
| '''A helper funciton to execute playback_cmd. |
| |
| @param kwargs: kwargs passed to playback_cmd. |
| ''' |
| cmd_utils.execute(playback_cmd(*args, **kwargs)) |
| |
| |
| def playback_cmd( |
| input, duration=None, channels=2, bits=16, rate=48000, device=None): |
| '''Plays the given input audio by the ALSA utility: 'aplay'. |
| |
| @param input: The input audio to be played. |
| @param duration: The length of the playback (in seconds). |
| @param channels: The number of channels of the input audio. |
| @param bits: The number of bits of each audio sample. |
| @param rate: The sampling rate. |
| @param device: The device to play the audio on. |
| @raise RuntimeError: If no playback device is available. |
| ''' |
| args = [APLAY_PATH] |
| if duration is not None: |
| args += ['-d', str(duration)] |
| args += _get_format_args(channels, bits, rate) |
| if device is None: |
| device = get_default_playback_device() |
| if device is None: |
| raise RuntimeError('no playback device') |
| args += ['-D', device] |
| args += [input] |
| return args |
| |
| |
| def record(*args, **kwargs): |
| '''A helper function to execute record_cmd. |
| |
| @param kwargs: kwargs passed to record_cmd. |
| ''' |
| cmd_utils.execute(record_cmd(*args, **kwargs)) |
| |
| |
| def record_cmd( |
| output, duration=None, channels=1, bits=16, rate=48000, device=None): |
| '''Records the audio to the specified output by ALSA utility: 'arecord'. |
| |
| @param output: The filename where the recorded audio will be stored to. |
| @param duration: The length of the recording (in seconds). |
| @param channels: The number of channels of the recorded audio. |
| @param bits: The number of bits of each audio sample. |
| @param rate: The sampling rate. |
| @param device: The device used to recorded the audio from. |
| @raise RuntimeError: If no record device is available. |
| ''' |
| args = [ARECORD_PATH] |
| if duration is not None: |
| args += ['-d', str(duration)] |
| args += _get_format_args(channels, bits, rate) |
| if device is None: |
| device = get_default_record_device() |
| if device is None: |
| raise RuntimeError('no record device') |
| args += ['-D', device] |
| args += [output] |
| return args |
| |
| |
| def mixer_cmd(card_id, cmd): |
| '''Executes amixer command. |
| |
| @param card_id: Soundcard ID. |
| @param cmd: Amixer command to execute. |
| @raise RuntimeError: If failed to execute command. |
| |
| Amixer command like "set PCM 2dB+" with card_id 1 will be executed as: |
| amixer -c 1 set PCM 2dB+ |
| |
| Command output will be returned if any. |
| ''' |
| |
| cmd = AMIXER_PATH + ' -c %d ' % card_id + cmd |
| p = cmd_utils.popen(shlex.split(cmd), stdout=cmd_utils.PIPE) |
| output, _ = p.communicate() |
| if p.wait() != 0: |
| raise RuntimeError('amixer command failed') |
| return output |