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audio810 (7)
  • >> audio810 (7) ( Solaris man: Макропакеты и соглашения )
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    NAME

    audio810 - Intel ICH series, nVidia nForce series and AMD 8111 audio core support.
     
    

    DESCRIPTION

    The audio810 driver provides support for AC 97 audio controllers embedded in Intel ICH, nVidia nForce, and AMD 8111 chips.  

    APPLICATION PROGRAM INTERFACE

    This interface is described in the mixer(7I) and audio(7I) man pages.  

    Driver Versions

    Applications that open /dev/audio may use the AUDIO_GETDEV ioctl(2) to determine which audio device is being used. The audio810 driver returns the string SUNW,audio810 in the name field of the audio_device structure. The version field contains a letter "a" and the config field contains the string onboard1.

    Platform Ver.OutH. Phone Spkr.InMic.CD
    Sun W1100z/ W2100z workstation aYYYYYY

    Key to the above table: Ver. = Version. Out = Line Out. H. Phone = Head Phone. Spkr = Internal Speaker. In = Line In. Mic. = Microphone. CD = CD=ROM.

    The audio810 device provides support for the internal speaker, headphone, line out, line in, and microphone. The play.mod_ports and record.mod_ports fields of the audio_info structure (see audio(7I)) indicate which ports may be manipulated.  

    Audio Mixer Mode

    This driver supports the mixer mode only. (Compat mode is not supported).  

    Audio Data Formats

    The audio810 device supports 16-bit linear encodings in stereo. With the mixer enabled, a continuous range of sample rates from 5510 to 48000 Hz is supported. With the mixer disabled, only sample rate 48000 Hz is supported. This is limited by hardware capability. The device can be opened for simultaneous play and record whether the mixer is enabled or not.  

    Sample Granularity

    Because the audio810 device manipulates buffers of audio data, the reported input and output sample counts will vary at any given time from the actual sample count by no more than the size of the buffers the audio810 driver is transferring. In general, programs should not rely on the absolute accuracy of the play.samples and record.samples fields of the audio_info structure.  

    Interrupt Rate

    The driver determines how often play and record interrupts should take place. For playing audio, this determines how often and how much audio is requested from the audio mixer. The impact of interrupts on recording is minimal. However, if a very small read buffer size is set, the record interrupt rate should be increased to prevent the buffer from overflowing. The play and record interrupt rates are tunable in the /kernel/drv/audio810.conf file.  

    Audio Status Change Notification

    As described in the audio(7I) and mixer(7I) man pages, it is possible to request asynchronous notification of changes in the state of an audio device.  

    ERRORS

    audio810 errors are described in the audio(7I) man page.  

    FILES

    /dev/audio


     Symbolic link to the system's primary audio device. (Not necessarily an audio810 audio device).

    /dev/audioctl

    Control device for the primary audio device.

    /dev/sound/0

    Represents the first audio device on the system. (Not necessarily an audio810 audio device).

    /dev/sound/0ctl

    Audio control for /dev/sound/0.

    /usr/share/audio/samples

    Audio sample files.

    /kernel/drv/audio810.conf

    audio810 driver configuration file.

     

    ATTRIBUTES

    See attributes(5) for a descriptions of the following attributes:

    ATTRIBUTE TYPEATTRIBUTE VALUE

    ArchitecturePC-based system

    Availability

    Stability level

     

    SEE ALSO

    mixerctl(1), sdtaudiocontrol(1), ioctl(2), attributes(5), audio(7I), mixer(7I), streamio(7I)

    AMD-8111 HyperTransport I/O Hub Data Sheet --- Advanced Micro Devices Inc.

    ALC655 Specification --- Realtek Inc.

    http://www.sun.com/io  

    NOTES

    Some laptops (including Sony VAIO, among others), have their on-board amplifier powered down by default, meaning that audio is suppressed even if hardware and the audio810 driver are working normally. To correct this, set the ac97-invert-amp=1 property in the /kernel/drv/audio810.conf to power-up the amplifier.  

    DIAGNOSTICS

    In addition to being logged, the following messages may appear on the system console:

    init_state() play interrupt rate set too low

    The play interrupt rate in audio810.conf is set too low. It has been reset to the rate specified in the message. Update audio810.conf to a higher play interrupt rate.

    init_state() play interrupt rate set too high

    The play interrupt rate set in audio810.conf is set too high. It has been reset to the rate specified in the message. Update audio810.conf to a lower play interrupt rate.

    init_state() record interrupt rate set too low

    The record interrupt rate in audio810.conf is set too low. It has been reset to the rate specified in the message. Update audio810.conf to a higher record interrupt rate.

    init_state() record interrupt rate set too high

    The record interrupt rate in audio810.conf is set too high. It has been reset to the rate specified in the message. Update audio810.conf to a lower record interrupt rate.


     

    Index

    NAME
    DESCRIPTION
    APPLICATION PROGRAM INTERFACE
    Driver Versions
    Audio Mixer Mode
    Audio Data Formats
    Sample Granularity
    Interrupt Rate
    Audio Status Change Notification
    ERRORS
    FILES
    ATTRIBUTES
    SEE ALSO
    NOTES
    DIAGNOSTICS


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