linux/sound/core/Kconfig
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   1# ALSA soundcard-configuration
   2config SND_TIMER
   3        tristate
   4
   5config SND_PCM
   6        tristate
   7        select SND_TIMER
   8
   9config SND_HWDEP
  10        tristate
  11
  12config SND_RAWMIDI
  13        tristate
  14
  15config SND_COMPRESS_OFFLOAD
  16        tristate
  17
  18# To be effective this also requires INPUT - users should say:
  19#    select SND_JACK if INPUT=y || INPUT=SND
  20# to avoid having to force INPUT on.
  21config SND_JACK
  22        bool
  23
  24config SND_SEQUENCER
  25        tristate "Sequencer support"
  26        select SND_TIMER
  27        help
  28          Say Y or M to enable MIDI sequencer and router support.  This
  29          feature allows routing and enqueueing of MIDI events.  Events
  30          can be processed at a given time.
  31
  32          Many programs require this feature, so you should enable it
  33          unless you know what you're doing.
  34
  35config SND_SEQ_DUMMY
  36        tristate "Sequencer dummy client"
  37        depends on SND_SEQUENCER
  38        help
  39          Say Y here to enable the dummy sequencer client.  This client
  40          is a simple MIDI-through client: all normal input events are
  41          redirected to the output port immediately.
  42
  43          You don't need this unless you want to connect many MIDI
  44          devices or applications together.
  45
  46          To compile this driver as a module, choose M here: the module
  47          will be called snd-seq-dummy.
  48
  49config SND_OSSEMUL
  50        select SOUND_OSS_CORE
  51        bool
  52
  53config SND_MIXER_OSS
  54        tristate "OSS Mixer API"
  55        select SND_OSSEMUL
  56        help
  57          To enable OSS mixer API emulation (/dev/mixer*), say Y here
  58          and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  59
  60          Many programs still use the OSS API, so say Y.
  61
  62          To compile this driver as a module, choose M here: the module
  63          will be called snd-mixer-oss.
  64
  65config SND_PCM_OSS
  66        tristate "OSS PCM (digital audio) API"
  67        select SND_OSSEMUL
  68        select SND_PCM
  69        help
  70          To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
  71          here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  72
  73          Many programs still use the OSS API, so say Y.
  74
  75          To compile this driver as a module, choose M here: the module
  76          will be called snd-pcm-oss.
  77
  78config SND_PCM_OSS_PLUGINS
  79        bool "OSS PCM (digital audio) API - Include plugin system"
  80        depends on SND_PCM_OSS
  81        default y
  82        help
  83          If you disable this option, the ALSA's OSS PCM API will not
  84          support conversion of channels, formats and rates. It will
  85          behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
  86
  87config SND_SEQUENCER_OSS
  88        bool "OSS Sequencer API"
  89        depends on SND_SEQUENCER
  90        select SND_OSSEMUL
  91        help
  92          Say Y here to enable OSS sequencer emulation (both
  93          /dev/sequencer and /dev/music interfaces).
  94
  95          Many programs still use the OSS API, so say Y.
  96
  97          If you choose M in "Sequencer support" (SND_SEQUENCER),
  98          this will be compiled as a module. The module will be called
  99          snd-seq-oss.
 100
 101config SND_HRTIMER
 102        tristate "HR-timer backend support"
 103        depends on HIGH_RES_TIMERS
 104        select SND_TIMER
 105        help
 106          Say Y here to enable HR-timer backend for ALSA timer.  ALSA uses
 107          the hrtimer as a precise timing source. The ALSA sequencer code
 108          also can use this timing source.
 109
 110          To compile this driver as a module, choose M here: the module
 111          will be called snd-hrtimer.
 112
 113config SND_SEQ_HRTIMER_DEFAULT
 114        bool "Use HR-timer as default sequencer timer"
 115        depends on SND_HRTIMER && SND_SEQUENCER
 116        default y
 117        help
 118          Say Y here to use the HR-timer backend as the default sequencer
 119          timer.
 120
 121config SND_RTCTIMER
 122        tristate "RTC Timer support"
 123        depends on RTC
 124        select SND_TIMER
 125        help
 126          Say Y here to enable RTC timer support for ALSA.  ALSA uses
 127          the RTC timer as a precise timing source and maps the RTC
 128          timer to ALSA's timer interface.  The ALSA sequencer code also
 129          can use this timing source.
 130
 131          To compile this driver as a module, choose M here: the module
 132          will be called snd-rtctimer.
 133
 134          Note that this option is exclusive with the new RTC drivers
 135          (CONFIG_RTC_CLASS) since this requires the old API.
 136
 137config SND_SEQ_RTCTIMER_DEFAULT
 138        bool "Use RTC as default sequencer timer"
 139        depends on SND_RTCTIMER && SND_SEQUENCER
 140        depends on !SND_SEQ_HRTIMER_DEFAULT
 141        default y
 142        help
 143          Say Y here to use the RTC timer as the default sequencer
 144          timer.  This is strongly recommended because it ensures
 145          precise MIDI timing even when the system timer runs at less
 146          than 1000 Hz.
 147
 148          If in doubt, say Y.
 149
 150config SND_DYNAMIC_MINORS
 151        bool "Dynamic device file minor numbers"
 152        help
 153          If you say Y here, the minor numbers of ALSA device files in
 154          /dev/snd/ are allocated dynamically.  This allows you to have
 155          more than 8 sound cards, but requires a dynamic device file
 156          system like udev.
 157
 158          If you are unsure about this, say N here.
 159
 160config SND_SUPPORT_OLD_API
 161        bool "Support old ALSA API"
 162        default y
 163        help
 164          Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
 165          or older).
 166
 167config SND_VERBOSE_PROCFS
 168        bool "Verbose procfs contents"
 169        depends on PROC_FS
 170        default y
 171        help
 172          Say Y here to include code for verbose procfs contents (provides
 173          useful information to developers when a problem occurs).  On the
 174          other side, it makes the ALSA subsystem larger.
 175
 176config SND_VERBOSE_PRINTK
 177        bool "Verbose printk"
 178        help
 179          Say Y here to enable verbose log messages.  These messages
 180          will help to identify source file and position containing
 181          printed messages.
 182
 183          You don't need this unless you're debugging ALSA.
 184
 185config SND_DEBUG
 186        bool "Debug"
 187        help
 188          Say Y here to enable ALSA debug code.
 189
 190config SND_DEBUG_VERBOSE
 191        bool "More verbose debug"
 192        depends on SND_DEBUG
 193        help
 194          Say Y here to enable extra-verbose debugging messages.
 195          
 196          Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
 197          So, say Y only if you are ready to be annoyed.
 198
 199config SND_PCM_XRUN_DEBUG
 200        bool "Enable PCM ring buffer overrun/underrun debugging"
 201        default n
 202        depends on SND_DEBUG && SND_VERBOSE_PROCFS
 203        help
 204          Say Y to enable the PCM ring buffer overrun/underrun debugging.
 205          It is usually not required, but if you have trouble with
 206          sound clicking when system is loaded, it may help to determine
 207          the process or driver which causes the scheduling gaps.
 208
 209config SND_VMASTER
 210        bool
 211
 212config SND_KCTL_JACK
 213        bool
 214
 215config SND_DMA_SGBUF
 216        def_bool y
 217        depends on X86
 218
 219source "sound/core/seq/Kconfig"
 220
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