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         select GCD
   9
  10 config SND_HWDEP
  11         tristate
  12
  13 config 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.
  19 config SND_JACK
  20         bool
  21
  22 config 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
  33 config 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
  47 config SND_OSSEMUL
  48         select SOUND_OSS_CORE
  49         bool
  50
  51 config 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
  63 config 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
  76 config 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
  85 config 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
  99 config 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
 111 config 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
 119 config 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
 135 config 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
 148 config 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
 158 config SND_COMPRESS_OFFLOAD
 159         tristate "ALSA Compressed audio offload support"
 160         default n
 161         help
 162           If you want support for offloading compressed audio and have such
 163           a hardware, then you should say Y here and also to the DSP driver
 164           of your platform.
 165
 166           If you are unsure about this, say N here.
 167
 168 config SND_SUPPORT_OLD_API
 169         bool "Support old ALSA API"
 170         default y
 171         help
 172           Say Y here to support the obsolete ALSA PCM API (ver.0.9.0 rc3
 173           or older).
 174
 175 config SND_VERBOSE_PROCFS
 176         bool "Verbose procfs contents"
 177         depends on PROC_FS
 178         default y
 179         help
 180           Say Y here to include code for verbose procfs contents (provides
 181           useful information to developers when a problem occurs).  On the
 182           other side, it makes the ALSA subsystem larger.
 183
 184 config SND_VERBOSE_PRINTK
 185         bool "Verbose printk"
 186         help
 187           Say Y here to enable verbose log messages.  These messages
 188           will help to identify source file and position containing
 189           printed messages.
 190
 191           You don't need this unless you're debugging ALSA.
 192
 193 config SND_DEBUG
 194         bool "Debug"
 195         help
 196           Say Y here to enable ALSA debug code.
 197
 198 config SND_DEBUG_VERBOSE
 199         bool "More verbose debug"
 200         depends on SND_DEBUG
 201         help
 202           Say Y here to enable extra-verbose debugging messages.
 203
 204           Let me repeat: it enables EXTRA-VERBOSE DEBUGGING messages.
 205           So, say Y only if you are ready to be annoyed.
 206
 207 config SND_PCM_XRUN_DEBUG
 208         bool "Enable PCM ring buffer overrun/underrun debugging"
 209         default n
 210         depends on SND_DEBUG && SND_VERBOSE_PROCFS
 211         help
 212           Say Y to enable the PCM ring buffer overrun/underrun debugging.
 213           It is usually not required, but if you have trouble with
 214           sound clicking when system is loaded, it may help to determine
 215           the process or driver which causes the scheduling gaps.
 216
 217 config SND_VMASTER
 218         bool
 219
 220 config SND_KCTL_JACK
 221         bool
 222
 223 config SND_DMA_SGBUF
 224         def_bool y
 225         depends on X86
 226
 227 source "sound/core/seq/Kconfig"