sound/core/Kconfig

   1 # ALSA soundcard-configuration
   2 config SND_TIMER
   3         tristate
   4
   5 config SND_PCM
   6         tristate
   7         select SND_TIMER
   8
   9 config SND_DMAENGINE_PCM
  10         tristate
  11
  12 config SND_HWDEP
  13         tristate
  14
  15 config SND_RAWMIDI
  16         tristate
  17
  18 config SND_COMPRESS_OFFLOAD
  19         tristate
  20
  21 # To be effective this also requires INPUT - users should say:
  22 #    select SND_JACK if INPUT=y || INPUT=SND
  23 # to avoid having to force INPUT on.
  24 config SND_JACK
  25         bool
  26
  27 config SND_SEQUENCER
  28         tristate "Sequencer support"
  29         select SND_TIMER
  30         help
  31           Say Y or M to enable MIDI sequencer and router support.  This
  32           feature allows routing and enqueueing of MIDI events.  Events
  33           can be processed at a given time.
  34
  35           Many programs require this feature, so you should enable it
  36           unless you know what you're doing.
  37
  38 config SND_SEQ_DUMMY
  39         tristate "Sequencer dummy client"
  40         depends on SND_SEQUENCER
  41         help
  42           Say Y here to enable the dummy sequencer client.  This client
  43           is a simple MIDI-through client: all normal input events are
  44           redirected to the output port immediately.
  45
  46           You don't need this unless you want to connect many MIDI
  47           devices or applications together.
  48
  49           To compile this driver as a module, choose M here: the module
  50           will be called snd-seq-dummy.
  51
  52 config SND_OSSEMUL
  53         select SOUND_OSS_CORE
  54         bool
  55
  56 config SND_MIXER_OSS
  57         tristate "OSS Mixer API"
  58         select SND_OSSEMUL
  59         help
  60           To enable OSS mixer API emulation (/dev/mixer*), say Y here
  61           and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  62
  63           Many programs still use the OSS API, so say Y.
  64
  65           To compile this driver as a module, choose M here: the module
  66           will be called snd-mixer-oss.
  67
  68 config SND_PCM_OSS
  69         tristate "OSS PCM (digital audio) API"
  70         select SND_OSSEMUL
  71         select SND_PCM
  72         help
  73           To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
  74           here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  75
  76           Many programs still use the OSS API, so say Y.
  77
  78           To compile this driver as a module, choose M here: the module
  79           will be called snd-pcm-oss.
  80
  81 config SND_PCM_OSS_PLUGINS
  82         bool "OSS PCM (digital audio) API - Include plugin system"
  83         depends on SND_PCM_OSS
  84         default y
  85         help
  86           If you disable this option, the ALSA's OSS PCM API will not
  87           support conversion of channels, formats and rates. It will
  88           behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
  89
  90 config SND_SEQUENCER_OSS
  91         bool "OSS Sequencer API"
  92         depends on SND_SEQUENCER
  93         select SND_OSSEMUL
  94         help
  95           Say Y here to enable OSS sequencer emulation (both
  96           /dev/sequencer and /dev/music interfaces).
  97
  98           Many programs still use the OSS API, so say Y.
  99
 100           If you choose M in "Sequencer support" (SND_SEQUENCER),
 101           this will be compiled as a module. The module will be called
 102           snd-seq-oss.
 103
 104 config SND_HRTIMER
 105         tristate "HR-timer backend support"
 106         depends on HIGH_RES_TIMERS
 107         select SND_TIMER
 108         help
 109           Say Y here to enable HR-timer backend for ALSA timer.  ALSA uses
 110           the hrtimer as a precise timing source. The ALSA sequencer code
 111           also can use this timing source.
 112
 113           To compile this driver as a module, choose M here: the module
 114           will be called snd-hrtimer.
 115
 116 config SND_SEQ_HRTIMER_DEFAULT
 117         bool "Use HR-timer as default sequencer timer"
 118         depends on SND_HRTIMER && SND_SEQUENCER
 119         default y
 120         help
 121           Say Y here to use the HR-timer backend as the default sequencer
 122           timer.
 123
 124 config SND_RTCTIMER
 125         tristate "RTC Timer support"
 126         depends on RTC
 127         select SND_TIMER
 128         help
 129           Say Y here to enable RTC timer support for ALSA.  ALSA uses
 130           the RTC timer as a precise timing source and maps the RTC
 131           timer to ALSA's timer interface.  The ALSA sequencer code also
 132           can use this timing source.
 133
 134           To compile this driver as a module, choose M here: the module
 135           will be called snd-rtctimer.
 136
 137           Note that this option is exclusive with the new RTC drivers
 138           (CONFIG_RTC_CLASS) since this requires the old API.
 139
 140 config SND_SEQ_RTCTIMER_DEFAULT
 141         bool "Use RTC as default sequencer timer"
 142         depends on SND_RTCTIMER && SND_SEQUENCER
 143         depends on !SND_SEQ_HRTIMER_DEFAULT
 144         default y
 145         help
 146           Say Y here to use the RTC timer as the default sequencer
 147           timer.  This is strongly recommended because it ensures
 148           precise MIDI timing even when the system timer runs at less
 149           than 1000 Hz.
 150
 151           If in doubt, say Y.
 152
 153 config SND_DYNAMIC_MINORS
 154         bool "Dynamic device file minor numbers"
 155         help
 156           If you say Y here, the minor numbers of ALSA device files in
 157           /dev/snd/ are allocated dynamically.  This allows you to have
 158           more than 8 sound cards, but requires a dynamic device file
 159           system like udev.
 160
 161           If you are unsure about this, say N here.
 162
 163 config SND_MAX_CARDS
 164         int "Max number of sound cards"
 165         range 4 256
 166         default 32
 167         depends on SND_DYNAMIC_MINORS
 168         help
 169           Specify the max number of sound cards that can be assigned
 170           on a single machine.
 171
 172 config SND_SUPPORT_OLD_API
 173         bool "Support old ALSA API"
 174         default y
 175         help
 176           Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
 177           or older).
 178
 179 config SND_VERBOSE_PROCFS
 180         bool "Verbose procfs contents"
 181         depends on PROC_FS
 182         default y
 183         help
 184           Say Y here to include code for verbose procfs contents (provides
 185           useful information to developers when a problem occurs).  On the
 186           other side, it makes the ALSA subsystem larger.
 187
 188 config SND_VERBOSE_PRINTK
 189         bool "Verbose printk"
 190         help
 191           Say Y here to enable verbose log messages.  These messages
 192           will help to identify source file and position containing
 193           printed messages.
 194
 195           You don't need this unless you're debugging ALSA.
 196
 197 config SND_DEBUG
 198         bool "Debug"
 199         help
 200           Say Y here to enable ALSA debug code.
 201
 202 config SND_DEBUG_VERBOSE
 203         bool "More verbose debug"
 204         depends on SND_DEBUG
 205         help
 206           Say Y here to enable extra-verbose debugging messages.
 207
 208           Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
 209           So, say Y only if you are ready to be annoyed.
 210
 211 config SND_PCM_XRUN_DEBUG
 212         bool "Enable PCM ring buffer overrun/underrun debugging"
 213         default n
 214         depends on SND_DEBUG && SND_VERBOSE_PROCFS
 215         help
 216           Say Y to enable the PCM ring buffer overrun/underrun debugging.
 217           It is usually not required, but if you have trouble with
 218           sound clicking when system is loaded, it may help to determine
 219           the process or driver which causes the scheduling gaps.
 220
 221 config SND_VMASTER
 222         bool
 223
 224 config SND_KCTL_JACK
 225         bool
 226
 227 config SND_DMA_SGBUF
 228         def_bool y
 229         depends on X86
 230
 231 source "sound/core/seq/Kconfig"