Le blog de Jean David TECHER, un Réunionnais à Saint-Priest/Lyon

1. About options

Options are settable through environment variables.

Example:

  export QEMU_AUDIO_DRV=wav
  export QEMU_WAV_PATH=$HOME/tune.wa

v (for csh replace export with setenv in the above)

  qemu ...

2. Audio options

Parameter	Type	Default Value	Description
QEMU_AUDIO_DAC_FIXED_SETTINGS	boolean	1	Use fixed settings for host DAC
QEMU_AUDIO_DAC_FIXED_FREQ	integer	44100	Frequency for fixed host DAC
QEMU_AUDIO_DAC_FIXED_FMT	format	S16	One ofU8 S8 U16 S16 U32 S32 - Format for fixed host DAC
QEMU_AUDIO_DAC_FIXED_CHANNELS	integer	2	Number of channels for fixed DAC (1 - mono,2 - stereo)
QEMU_AUDIO_DAC_VOICES	integer	1	Number of voices for DAC
QEMU_AUDIO_DAC_TRY_POLL	boolean	1	Attempt using poll mode for DAC
QEMU_AUDIO_ADC_FIXED_SETTINGS	boolean	1	Use fixed settings for host ADC
QEMU_AUDIO_ADC_FIXED_FREQ	integer	44100	Frequency for fixed host ADC
QEMU_AUDIO_ADC_FIXED_FMT	format	S16	One of U8 S8 U16 S16 U32 S32 - Format for fixed host ADC
QEMU_AUDIO_ADC_FIXED_CHANNELS	integer	2	Number of channels for fixed ADC (1 - mono , 2 - stereo)
QEMU_AUDIO_ADC_VOICES	integer	1	Number of voices for ADC
QEMU_AUDIO_ADC_TRY_POLL	boolean	1	Attempt using poll mode for ADC
QEMU_AUDIO_TIMER_PERIOD	integer	100	Timer period in HZ (0 - use lowest possible)

3. Available drivers:

3.a) ALSA

Description: ALSA http://www.alsa-project.org

• Theoretically supports many playback voices
• Theoretically supports many capture voices.

Parameter	Type	Default Value	Description
QEMU_ALSA_DAC_SIZE_IN_USEC	boolean	0	DAC period/buffer size in microseconds (otherwise in frames)
QEMU_ALSA_DAC_PERIOD_SIZE	integer	1024	DAC period size (0 to go with system default)
QEMU_ALSA_DAC_BUFFER_SIZE	integer	4096	DAC buffer size (0 to go with system default)
QEMU_ALSA_ADC_SIZE_IN_USEC	boolean	0	ADC period/buffer size in microseconds (otherwise in frames)
QEMU_ALSA_ADC_PERIOD_SIZE	integer	0	ADC period size (0 to go with system default)
QEMU_ALSA_ADC_BUFFER_SIZE	integer	0	ADC buffer size (0 to go with system default)
QEMU_ALSA_THRESHOLD	integer	0	(undocumented)
QEMU_ALSA_DAC_DEV	string	default	DAC device name (for instance dmix)
QEMU_ALSA_ADC_DEV	string	default	ADC device name

3.b) PA (Pulse Audio)

Name: pa Description: http://www.pulseaudio.org/

• Theoretically supports many playback voices
• Theoretically supports many capture voices

Parameter	Type	Default Value	Description
QEMU_PA_SAMPLES	integer	4096	buffer size in samples
QEMU_PA_SERVER	string	(not set)	server address
QEMU_PA_SINK	string	(not set)	sink device name
QEMU_PA_SOURCE	string	(not set)	source device name

3.c) SDL

Name: sdl Description: SDL http://www.libsdl.org

• One playback voice
• Does not support capture

Parameter	Type	Default Value	Description
QEMU_SDL_SAMPLES	integer	1024	Size of SDL buffer in samples

3.d) None

Name: none Description: Timer based audio emulation

• Theoretically supports many playback voices
• Theoretically supports many capture voices

3.e) WAV

Name: wav Description: WAV renderer http://wikipedia.org/wiki/WAV

• One playback voice
• Does not support capture

Parameter	Type	Default Value	Description
QEMU_WAV_FREQUENCY	integer	44100	Frequency
QEMU_WAV_FORMAT	format	S16	(one of: U8 S8 U16 S16 U32 S32) Format
QEMU_WAV_DAC_FIXED_CHANNELS	integer	2	Number of channels (1 - mono, 2 - stereo)
QEMU_WAV_PATH	string	qemu.wav	Path to wave file

4. Help from Linux shell

Use option -audio-help to get help shown below

root@amdgaming:~# /opt/qemu/2.4.0.1/bin/qemu-system-i386 -audio-help
Audio options:
  QEMU_AUDIO_DAC_FIXED_SETTINGS: boolean, default = 1
    Use fixed settings for host DAC
  QEMU_AUDIO_DAC_FIXED_FREQ: integer, default = 44100
    Frequency for fixed host DAC
  QEMU_AUDIO_DAC_FIXED_FMT: format, default = S16, (one of: U8 S8 U16 S16 U32 S32)
    Format for fixed host DAC
  QEMU_AUDIO_DAC_FIXED_CHANNELS: integer, default = 2
    Number of channels for fixed DAC (1 - mono, 2 - stereo)
  QEMU_AUDIO_DAC_VOICES: integer, default = 1
    Number of voices for DAC
  QEMU_AUDIO_DAC_TRY_POLL: boolean, default = 1
    Attempt using poll mode for DAC
  QEMU_AUDIO_ADC_FIXED_SETTINGS: boolean, default = 1
    Use fixed settings for host ADC
  QEMU_AUDIO_ADC_FIXED_FREQ: integer, default = 44100
    Frequency for fixed host ADC
  QEMU_AUDIO_ADC_FIXED_FMT: format, default = S16, (one of: U8 S8 U16 S16 U32 S32)
    Format for fixed host ADC
  QEMU_AUDIO_ADC_FIXED_CHANNELS: integer, default = 2
    Number of channels for fixed ADC (1 - mono, 2 - stereo)
  QEMU_AUDIO_ADC_VOICES: integer, default = 1
    Number of voices for ADC
  QEMU_AUDIO_ADC_TRY_POLL: boolean, default = 1
    Attempt using poll mode for ADC
  QEMU_AUDIO_TIMER_PERIOD: integer, default = 100
    Timer period in HZ (0 - use lowest possible)

Available drivers:
Name: alsa
Description: ALSA http://www.alsa-project.org
Theoretically supports many playback voices
Theoretically supports many capture voices
Options:
  QEMU_ALSA_DAC_SIZE_IN_USEC: boolean, default = 0
    DAC period/buffer size in microseconds (otherwise in frames)
  QEMU_ALSA_DAC_PERIOD_SIZE: integer, default = 1024
    DAC period size (0 to go with system default)
  QEMU_ALSA_DAC_BUFFER_SIZE: integer, default = 4096
    DAC buffer size (0 to go with system default)
  QEMU_ALSA_ADC_SIZE_IN_USEC: boolean, default = 0
    ADC period/buffer size in microseconds (otherwise in frames)
  QEMU_ALSA_ADC_PERIOD_SIZE: integer, default = 0
    ADC period size (0 to go with system default)
  QEMU_ALSA_ADC_BUFFER_SIZE: integer, default = 0
    ADC buffer size (0 to go with system default)
  QEMU_ALSA_THRESHOLD: integer, default = 0
    (undocumented)
  QEMU_ALSA_DAC_DEV: string, default = default
    DAC device name (for instance dmix)
  QEMU_ALSA_ADC_DEV: string, default = default
    ADC device name

Name: pa
Description: http://www.pulseaudio.org/
Theoretically supports many playback voices
Theoretically supports many capture voices
Options:
  QEMU_PA_SAMPLES: integer, default = 4096
    buffer size in samples
  QEMU_PA_SERVER: string, default = (not set)
    server address
  QEMU_PA_SINK: string, default = (not set)
    sink device name
  QEMU_PA_SOURCE: string, default = (not set)
    source device name

Name: sdl
Description: SDL http://www.libsdl.org
One playback voice
Does not support capture
Options:
  QEMU_SDL_SAMPLES: integer, default = 1024
    Size of SDL buffer in samples

Name: none
Description: Timer based audio emulation
Theoretically supports many playback voices
Theoretically supports many capture voices
No options

Name: wav
Description: WAV renderer http://wikipedia.org/wiki/WAV
One playback voice
Does not support capture
Options:
  QEMU_WAV_FREQUENCY: integer, default = 44100
    Frequency
  QEMU_WAV_FORMAT: format, default = S16, (one of: U8 S8 U16 S16 U32 S32)
    Format
  QEMU_WAV_DAC_FIXED_CHANNELS: integer, default = 2
    Number of channels (1 - mono, 2 - stereo)
  QEMU_WAV_PATH: string, default = qemu.wav
    Path to wave file

Options are settable through environment variables.
Example:
  export QEMU_AUDIO_DRV=wav
  export QEMU_WAV_PATH=$HOME/tune.wav
(for csh replace export with setenv in the above)
  qemu ...

Voir à  http://www.dailymotion.com/playlist/x4139m_nls7749_cobra-space-adventures-fr/1#video=xn5uxq

I love this song

• Set up environment -- nodejs is already built --

  export PATH=/opt/nodejs/0.12.7/bin/:$PATH
  export LD_LIBRARY_PATH=/opt/nodejs/0.12.7/lib/:/usr/local/lib/:/lib/:/usr/lib
  

• Download latest sources from github

  git clone https://github.com/etianen/html5media.git
  cd html5media/
  

• Install gulp and a couple of dependencies

  npm install  gulp gulp-uglify gulp-rename gulp-concat gulp-clean gulp-minify-css gulp-shell gulp-jshint gulp-less gulp-recess gulp-replace

• Build html5media (refer to https://github.com/etianen/html5media/blob/master/BUILDING.markdown)

  gulp build

  
• Once build is complete you should have everything located in build folder