From owner-cvs-all  Sun May 27 10:22: 5 2001
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From: Cameron Grant <cg@FreeBSD.org>
Date: Sun, 27 May 2001 10:22:01 -0700 (PDT)
To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org
Subject: cvs commit: src/sys/dev/sound/pcm vchan.c vchan.h channel.c
         channel.h channel_if.m dsp.c dsp.h fake.c sound.c sound.h
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cg          2001/05/27 10:22:01 PDT

  Modified files:
    sys/dev/sound/pcm    channel.c channel.h channel_if.m dsp.c 
                         dsp.h fake.c sound.c sound.h 
  Added files:
    sys/dev/sound/pcm    vchan.c vchan.h 
  Log:
  beginnings of virtual playback channel support
  
  instead of using two malloced arrays for storing channel lists, use an
  slist.  convert the sndstat device to use sbufs and optionally provide more
  detail about channel state.
  
  vchans are software mixed playback channels.  they are not enabled by this
  commit.  they use the feeder infrastructure to emulate normal playback
  channels in a manner transparent to applications, whilst providing as many
  channels are desired, especially suitable for devices with only one hardware
  playback channel.  in the future they will provide additional features.
  
  those wishing to test this functionality will need to add vchan.c to
  sys/conf/files and use 'sysctl -w hw.snd.pcm0.vchans' to enable it.
  
  blocksize and auto-rate selection are not yet supported.
  
  Revision  Changes    Path
  1.56      +114 -23   src/sys/dev/sound/pcm/channel.c
  1.18      +23 -3     src/sys/dev/sound/pcm/channel.h
  1.4       +19 -2     src/sys/dev/sound/pcm/channel_if.m
  1.36      +47 -38    src/sys/dev/sound/pcm/dsp.c
  1.4       +2 -2      src/sys/dev/sound/pcm/dsp.h
  1.9       +2 -2      src/sys/dev/sound/pcm/fake.c
  1.43      +294 -146  src/sys/dev/sound/pcm/sound.c
  1.30      +18 -4     src/sys/dev/sound/pcm/sound.h


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