Re: [Qemu-devel] [PATCH, resend] [STABLE] Sync OSS_GETVERSION handling with head

[malc <av1474@comtv.ru>]

On Sun, 18 Apr 2010, Aurelien Jarno wrote:

> On Sun, Apr 11, 2010 at 06:17:32PM +0200, Juergen Lock wrote:
> > As suggested by Andreas F?rber, here is a cumulative patch that syncs
> > OSS_GETVERSION handling with head by merging the following commits:
> > 
> > 1. oss: issue OSS_GETVERSION ioctl only when needed
> >    6d246526ce3c145b2831285def6983f5de6190d3
> > 
> > 2. oss: fix fragment setting
> >    3d709fe73a77c40e263b3af6e650fd4b519c3562
> > 
> > 3. Workaround for broken OSS_GETVERSION on FreeBSD, part two
> >    72ff25e4e98d6dba9286d032b9ff5432553bbad5
> > 
> > Signed-off-by: Juergen Lock <nox@jelal.kn-bremen.de>
> 
> I would actually prefer a patch series instead of a cumulative patch, so
> that we can match commits between HEAD and stable-0.12.
> 
> Also malc, do you have any comment on that?

I don't get this: what is that i need to comment on? The patches were
commited to master, so i don't have anything against them.

> 
> > --- a/audio/ossaudio.c
> > +++ b/audio/ossaudio.c
> > @@ -38,6 +38,10 @@
> >  #define AUDIO_CAP "oss"
> >  #include "audio_int.h"
> >  
> > +#if defined OSS_GETVERSION && defined SNDCTL_DSP_POLICY
> > +#define USE_DSP_POLICY
> > +#endif
> > +
> >  typedef struct OSSVoiceOut {
> >      HWVoiceOut hw;
> >      void *pcm_buf;
> > @@ -236,14 +240,39 @@ static void oss_dump_info (struct oss_pa
> >  }
> >  #endif
> >  
> > +#ifdef USE_DSP_POLICY
> > +static int oss_get_version (int fd, int *version, const char *typ)
> > +{
> > +    if (ioctl (fd, OSS_GETVERSION, &version)) {
> > +#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
> > +        /*
> > +         * Looks like atm (20100109) FreeBSD knows OSS_GETVERSION
> > +         * since 7.x, but currently only on the mixer device (or in
> > +         * the Linuxolator), and in the native version that part of
> > +         * the code is in fact never reached so the ioctl fails anyway.
> > +         * Until this is fixed, just check the errno and if its what
> > +         * FreeBSD's sound drivers return atm assume they are new enough.
> > +         */
> > +        if (errno == EINVAL) {
> > +            *version = 0x040000;
> > +            return 0;
> > +        }
> > +#endif
> > +        oss_logerr2 (errno, typ, "Failed to get OSS version\n");
> > +        return -1;
> > +    }
> > +    return 0;
> > +}
> > +#endif
> > +
> >  static int oss_open (int in, struct oss_params *req,
> >                       struct oss_params *obt, int *pfd)
> >  {
> >      int fd;
> > -    int version;
> >      int oflags = conf.exclusive ? O_EXCL : 0;
> >      audio_buf_info abinfo;
> >      int fmt, freq, nchannels;
> > +    int setfragment = 1;
> >      const char *dspname = in ? conf.devpath_in : conf.devpath_out;
> >      const char *typ = in ? "ADC" : "DAC";
> >  
> > @@ -281,27 +310,30 @@ static int oss_open (int in, struct oss_
> >          goto err;
> >      }
> >  
> > -    if (ioctl (fd, OSS_GETVERSION, &version)) {
> > -        oss_logerr2 (errno, typ, "Failed to get OSS version\n");
> > -        version = 0;
> > -    }
> > +#ifdef USE_DSP_POLICY
> > +    if (conf.policy >= 0) {
> > +        int version;
> >  
> > -    if (conf.debug) {
> > -        dolog ("OSS version = %#x\n", version);
> > -    }
> > +        if (!oss_get_version (fd, &version, typ)) {
> > +            if (conf.debug) {
> > +                dolog ("OSS version = %#x\n", version);
> > +            }
> >  
> > -#ifdef SNDCTL_DSP_POLICY
> > -    if (conf.policy >= 0 && version >= 0x040000) {
> > -        int policy = conf.policy;
> > -        if (ioctl (fd, SNDCTL_DSP_POLICY, &policy)) {
> > -            oss_logerr2 (errno, typ, "Failed to set timing policy to %d\n",
> > -                         conf.policy);
> > -            goto err;
> > +            if (version >= 0x040000) {
> > +                int policy = conf.policy;
> > +                if (ioctl (fd, SNDCTL_DSP_POLICY, &policy)) {
> > +                    oss_logerr2 (errno, typ,
> > +                                 "Failed to set timing policy to %d\n",
> > +                                 conf.policy);
> > +                    goto err;
> > +                }
> > +                setfragment = 0;
> > +            }
> >          }
> >      }
> > -    else
> >  #endif
> > -    {
> > +
> > +    if (setfragment) {
> >          int mmmmssss = (req->nfrags << 16) | ctz32 (req->fragsize);
> >          if (ioctl (fd, SNDCTL_DSP_SETFRAGMENT, &mmmmssss)) {
> >              oss_logerr2 (errno, typ, "Failed to set buffer length (%d, %d)\n",
> > @@ -857,7 +889,7 @@ static struct audio_option oss_options[]
> >          .valp  = &conf.exclusive,
> >          .descr = "Open device in exclusive mode (vmix wont work)"
> >      },
> > -#ifdef SNDCTL_DSP_POLICY
> > +#ifdef USE_DSP_POLICY
> >      {
> >          .name  = "POLICY",
> >          .tag   = AUD_OPT_INT,
> > 
> > 
> > 
> 
> 

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