LXR linux/sound/core/Kconfig

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