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_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 # To be effective this also requires INPUT - users should say:
  28 #    select SND_JACK if INPUT=y || INPUT=SND
  29 # to avoid having to force INPUT on.
  30 config SND_JACK
  31         bool
  32
  33 config SND_SEQUENCER
  34         tristate "Sequencer support"
  35         select SND_TIMER
  36         help
  37           Say Y or M to enable MIDI sequencer and router support.  This
  38           feature allows routing and enqueueing of MIDI events.  Events
  39           can be processed at a given time.
  40
  41           Many programs require this feature, so you should enable it
  42           unless you know what you're doing.
  43
  44 config SND_SEQ_DUMMY
  45         tristate "Sequencer dummy client"
  46         depends on SND_SEQUENCER
  47         help
  48           Say Y here to enable the dummy sequencer client.  This client
  49           is a simple MIDI-through client: all normal input events are
  50           redirected to the output port immediately.
  51
  52           You don't need this unless you want to connect many MIDI
  53           devices or applications together.
  54
  55           To compile this driver as a module, choose M here: the module
  56           will be called snd-seq-dummy.
  57
  58 config SND_OSSEMUL
  59         select SOUND_OSS_CORE
  60         bool
  61
  62 config SND_MIXER_OSS
  63         tristate "OSS Mixer API"
  64         select SND_OSSEMUL
  65         help
  66           To enable OSS mixer API emulation (/dev/mixer*), say Y here
  67           and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  68
  69           Many programs still use the OSS API, so say Y.
  70
  71           To compile this driver as a module, choose M here: the module
  72           will be called snd-mixer-oss.
  73
  74 config SND_PCM_OSS
  75         tristate "OSS PCM (digital audio) API"
  76         select SND_OSSEMUL
  77         select SND_PCM
  78         help
  79           To enable OSS digital audio (PCM) emulation (/dev/dsp*), say Y
  80           here and read <file:Documentation/sound/alsa/OSS-Emulation.txt>.
  81
  82           Many programs still use the OSS API, so say Y.
  83
  84           To compile this driver as a module, choose M here: the module
  85           will be called snd-pcm-oss.
  86
  87 config SND_PCM_OSS_PLUGINS
  88         bool "OSS PCM (digital audio) API - Include plugin system"
  89         depends on SND_PCM_OSS
  90         default y
  91         help
  92           If you disable this option, the ALSA's OSS PCM API will not
  93           support conversion of channels, formats and rates. It will
  94           behave like most of new OSS/Free drivers in 2.4/2.6 kernels.
  95
  96 config SND_SEQUENCER_OSS
  97         bool "OSS Sequencer API"
  98         depends on SND_SEQUENCER
  99         select SND_OSSEMUL
 100         help
 101           Say Y here to enable OSS sequencer emulation (both
 102           /dev/sequencer and /dev/music interfaces).
 103
 104           Many programs still use the OSS API, so say Y.
 105
 106           If you choose M in "Sequencer support" (SND_SEQUENCER),
 107           this will be compiled as a module. The module will be called
 108           snd-seq-oss.
 109
 110 config SND_HRTIMER
 111         tristate "HR-timer backend support"
 112         depends on HIGH_RES_TIMERS
 113         select SND_TIMER
 114         help
 115           Say Y here to enable HR-timer backend for ALSA timer.  ALSA uses
 116           the hrtimer as a precise timing source. The ALSA sequencer code
 117           also can use this timing source.
 118
 119           To compile this driver as a module, choose M here: the module
 120           will be called snd-hrtimer.
 121
 122 config SND_SEQ_HRTIMER_DEFAULT
 123         bool "Use HR-timer as default sequencer timer"
 124         depends on SND_HRTIMER && SND_SEQUENCER
 125         default y
 126         help
 127           Say Y here to use the HR-timer backend as the default sequencer
 128           timer.
 129
 130 config SND_RTCTIMER
 131         tristate "RTC Timer support"
 132         depends on RTC
 133         select SND_TIMER
 134         help
 135           Say Y here to enable RTC timer support for ALSA.  ALSA uses
 136           the RTC timer as a precise timing source and maps the RTC
 137           timer to ALSA's timer interface.  The ALSA sequencer code also
 138           can use this timing source.
 139
 140           To compile this driver as a module, choose M here: the module
 141           will be called snd-rtctimer.
 142
 143           Note that this option is exclusive with the new RTC drivers
 144           (CONFIG_RTC_CLASS) since this requires the old API.
 145
 146 config SND_SEQ_RTCTIMER_DEFAULT
 147         bool "Use RTC as default sequencer timer"
 148         depends on SND_RTCTIMER && SND_SEQUENCER
 149         depends on !SND_SEQ_HRTIMER_DEFAULT
 150         default y
 151         help
 152           Say Y here to use the RTC timer as the default sequencer
 153           timer.  This is strongly recommended because it ensures
 154           precise MIDI timing even when the system timer runs at less
 155           than 1000 Hz.
 156
 157           If in doubt, say Y.
 158
 159 config SND_DYNAMIC_MINORS
 160         bool "Dynamic device file minor numbers"
 161         help
 162           If you say Y here, the minor numbers of ALSA device files in
 163           /dev/snd/ are allocated dynamically.  This allows you to have
 164           more than 8 sound cards, but requires a dynamic device file
 165           system like udev.
 166
 167           If you are unsure about this, say N here.
 168
 169 config SND_MAX_CARDS
 170         int "Max number of sound cards"
 171         range 4 256
 172         default 32
 173         depends on SND_DYNAMIC_MINORS
 174         help
 175           Specify the max number of sound cards that can be assigned
 176           on a single machine.
 177
 178 config SND_SUPPORT_OLD_API
 179         bool "Support old ALSA API"
 180         default y
 181         help
 182           Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
 183           or older).
 184
 185 config SND_PROC_FS
 186         bool "Sound Proc FS Support" if EXPERT
 187         depends on PROC_FS
 188         default y
 189         help
 190           Say 'N' to disable Sound proc FS, which may reduce code size about
 191           9KB on x86_64 platform.
 192           If unsure say Y.
 193
 194 config SND_VERBOSE_PROCFS
 195         bool "Verbose procfs contents"
 196         depends on SND_PROC_FS
 197         default y
 198         help
 199           Say Y here to include code for verbose procfs contents (provides
 200           useful information to developers when a problem occurs).  On the
 201           other side, it makes the ALSA subsystem larger.
 202
 203 config SND_VERBOSE_PRINTK
 204         bool "Verbose printk"
 205         help
 206           Say Y here to enable verbose log messages.  These messages
 207           will help to identify source file and position containing
 208           printed messages.
 209
 210           You don't need this unless you're debugging ALSA.
 211
 212 config SND_DEBUG
 213         bool "Debug"
 214         help
 215           Say Y here to enable ALSA debug code.
 216
 217 config SND_DEBUG_VERBOSE
 218         bool "More verbose debug"
 219         depends on SND_DEBUG
 220         help
 221           Say Y here to enable extra-verbose debugging messages.
 222
 223           Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
 224           So, say Y only if you are ready to be annoyed.
 225
 226 config SND_PCM_XRUN_DEBUG
 227         bool "Enable PCM ring buffer overrun/underrun debugging"
 228         default n
 229         depends on SND_DEBUG && SND_VERBOSE_PROCFS
 230         help
 231           Say Y to enable the PCM ring buffer overrun/underrun debugging.
 232           It is usually not required, but if you have trouble with
 233           sound clicking when system is loaded, it may help to determine
 234           the process or driver which causes the scheduling gaps.
 235
 236 config SND_VMASTER
 237         bool
 238
 239 config SND_DMA_SGBUF
 240         def_bool y
 241         depends on X86
 242
 243 source "sound/core/seq/Kconfig"