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_HWDEP
  10         tristate
  11
  12 config SND_RAWMIDI
  13         tristate
  14
  15 config 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.
  21 config SND_JACK
  22         bool
  23
  24 config 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
  35 config 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
  49 config SND_OSSEMUL
  50         select SOUND_OSS_CORE
  51         bool
  52
  53 config 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
  65 config 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
  78 config 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
  87 config 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
 101 config 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
 113 config 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
 121 config 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
 137 config 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
 150 config 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
 160 config SND_MAX_CARDS
 161         int "Max number of sound cards"
 162         range 4 256
 163         default 32
 164         depends on SND_DYNAMIC_MINORS
 165         help
 166           Specify the max number of sound cards that can be assigned
 167           on a single machine.
 168
 169 config SND_SUPPORT_OLD_API
 170         bool "Support old ALSA API"
 171         default y
 172         help
 173           Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
 174           or older).
 175
 176 config SND_VERBOSE_PROCFS
 177         bool "Verbose procfs contents"
 178         depends on PROC_FS
 179         default y
 180         help
 181           Say Y here to include code for verbose procfs contents (provides
 182           useful information to developers when a problem occurs).  On the
 183           other side, it makes the ALSA subsystem larger.
 184
 185 config SND_VERBOSE_PRINTK
 186         bool "Verbose printk"
 187         help
 188           Say Y here to enable verbose log messages.  These messages
 189           will help to identify source file and position containing
 190           printed messages.
 191
 192           You don't need this unless you're debugging ALSA.
 193
 194 config SND_DEBUG
 195         bool "Debug"
 196         help
 197           Say Y here to enable ALSA debug code.
 198
 199 config SND_DEBUG_VERBOSE
 200         bool "More verbose debug"
 201         depends on SND_DEBUG
 202         help
 203           Say Y here to enable extra-verbose debugging messages.
 204
 205           Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
 206           So, say Y only if you are ready to be annoyed.
 207
 208 config SND_PCM_XRUN_DEBUG
 209         bool "Enable PCM ring buffer overrun/underrun debugging"
 210         default n
 211         depends on SND_DEBUG && SND_VERBOSE_PROCFS
 212         help
 213           Say Y to enable the PCM ring buffer overrun/underrun debugging.
 214           It is usually not required, but if you have trouble with
 215           sound clicking when system is loaded, it may help to determine
 216           the process or driver which causes the scheduling gaps.
 217
 218 config SND_VMASTER
 219         bool
 220
 221 config SND_KCTL_JACK
 222         bool
 223
 224 config SND_DMA_SGBUF
 225         def_bool y
 226         depends on X86
 227
 228 source "sound/core/seq/Kconfig"