sound/core/Kconfig

   1 # ALSA soundcard-configuration
   2 config SND_TIMER
   3         tristate
   4
   5 config SND_PCM
   6         tristate
   7         select SND_TIMER if SND_PCM_TIMER
   8
   9 config SND_PCM_ELD
  10         bool
  11
  12 config SND_PCM_IEC958
  13         bool
  14
  15 config SND_DMAENGINE_PCM
  16         tristate
  17
  18 config SND_HWDEP
  19         tristate
  20
  21 config SND_RAWMIDI
  22         tristate
  23
  24 config SND_COMPRESS_OFFLOAD
  25         tristate
  26
  27 config SND_JACK
  28         bool
  29
  30 # enable input device support in jack layer
  31 config SND_JACK_INPUT_DEV
  32         bool
  33         depends on SND_JACK
  34         default y if INPUT=y || INPUT=SND
  35
  36 config SND_SEQUENCER
  37         tristate "Sequencer support"
  38         select SND_TIMER
  39         help
  40           Say Y or M to enable MIDI sequencer and router support.  This
  41           feature allows routing and enqueueing of MIDI events.  Events
  42           can be processed at a given time.
  43
  44           Many programs require this feature, so you should enable it
  45           unless you know what you're doing.
  46
  47 config SND_SEQ_DUMMY
  48         tristate "Sequencer dummy client"
  49         depends on SND_SEQUENCER
  50         help
  51           Say Y here to enable the dummy sequencer client.  This client
  52           is a simple MIDI-through client: all normal input events are
  53           redirected to the output port immediately.
  54
  55           You don't need this unless you want to connect many MIDI
  56           devices or applications together.
  57
  58           To compile this driver as a module, choose M here: the module
  59           will be called snd-seq-dummy.
  60
  61 config SND_OSSEMUL
  62         select SOUND_OSS_CORE
  63         bool
  64
  65 config SND_MIXER_OSS
  66         tristate "OSS Mixer API"
  67         select SND_OSSEMUL
  68         help
  69           To enable OSS mixer API emulation (/dev/mixer*), say Y here
  70           and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  71
  72           Many programs still use the OSS API, so say Y.
  73
  74           To compile this driver as a module, choose M here: the module
  75           will be called snd-mixer-oss.
  76
  77 config SND_PCM_OSS
  78         tristate "OSS PCM (digital audio) API"
  79         select SND_OSSEMUL
  80         select SND_PCM
  81         help
  82           To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
  83           here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  84
  85           Many programs still use the OSS API, so say Y.
  86
  87           To compile this driver as a module, choose M here: the module
  88           will be called snd-pcm-oss.
  89
  90 config SND_PCM_OSS_PLUGINS
  91         bool "OSS PCM (digital audio) API - Include plugin system"
  92         depends on SND_PCM_OSS
  93         default y
  94         help
  95           If you disable this option, the ALSA's OSS PCM API will not
  96           support conversion of channels, formats and rates. It will
  97           behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
  98
  99 config SND_PCM_TIMER
 100         bool "PCM timer interface" if EXPERT
 101         default y
 102         help
 103           If you disable this option, pcm timer will be unavailable, so
 104           those stubs that use pcm timer (e.g. dmix, dsnoop & co) may work
 105           incorrectlly.
 106
 107           For some embedded devices, we may disable it to reduce memory
 108           footprint, about 20KB on x86_64 platform.
 109
 110 config SND_SEQUENCER_OSS
 111         bool "OSS Sequencer API"
 112         depends on SND_SEQUENCER
 113         select SND_OSSEMUL
 114         help
 115           Say Y here to enable OSS sequencer emulation (both
 116           /dev/sequencer and /dev/music interfaces).
 117
 118           Many programs still use the OSS API, so say Y.
 119
 120           If you choose M in "Sequencer support" (SND_SEQUENCER),
 121           this will be compiled as a module. The module will be called
 122           snd-seq-oss.
 123
 124 config SND_HRTIMER
 125         tristate "HR-timer backend support"
 126         depends on HIGH_RES_TIMERS
 127         select SND_TIMER
 128         help
 129           Say Y here to enable HR-timer backend for ALSA timer.  ALSA uses
 130           the hrtimer as a precise timing source. The ALSA sequencer code
 131           also can use this timing source.
 132
 133           To compile this driver as a module, choose M here: the module
 134           will be called snd-hrtimer.
 135
 136 config SND_SEQ_HRTIMER_DEFAULT
 137         bool "Use HR-timer as default sequencer timer"
 138         depends on SND_HRTIMER && SND_SEQUENCER
 139         default y
 140         help
 141           Say Y here to use the HR-timer backend as the default sequencer
 142           timer.
 143
 144 config SND_DYNAMIC_MINORS
 145         bool "Dynamic device file minor numbers"
 146         help
 147           If you say Y here, the minor numbers of ALSA device files in
 148           /dev/snd/ are allocated dynamically.  This allows you to have
 149           more than 8 sound cards, but requires a dynamic device file
 150           system like udev.
 151
 152           If you are unsure about this, say N here.
 153
 154 config SND_MAX_CARDS
 155         int "Max number of sound cards"
 156         range 4 256
 157         default 32
 158         depends on SND_DYNAMIC_MINORS
 159         help
 160           Specify the max number of sound cards that can be assigned
 161           on a single machine.
 162
 163 config SND_SUPPORT_OLD_API
 164         bool "Support old ALSA API"
 165         default y
 166         help
 167           Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
 168           or older).
 169
 170 config SND_PROC_FS
 171         bool "Sound Proc FS Support" if EXPERT
 172         depends on PROC_FS
 173         default y
 174         help
 175           Say 'N' to disable Sound proc FS, which may reduce code size about
 176           9KB on x86_64 platform.
 177           If unsure say Y.
 178
 179 config SND_VERBOSE_PROCFS
 180         bool "Verbose procfs contents"
 181         depends on SND_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_DMA_SGBUF
 225         def_bool y
 226         depends on X86
 227
 228 source "sound/core/seq/Kconfig"