[alsa-devel] patch for jack plugin

[Takashi Iwai]

At Thu, 29 Dec 2011 16:12:04 +0000,
Fons Adriaensen wrote:
> 
> The following patch will make snd_pcm_poll_descriptors_revents()
> return the correct value when used on a jack plugin device.
> The current version returns POLLIN regardless of capture or
> playback.

Applied now.  Thanks.


Takashi

> 
> 
> --- pcm_jack_orig.c     2011-12-29 16:42:07.000000000 +0100
> +++ pcm_jack.c  2011-12-29 16:51:18.000000000 +0100
> @@ -77,17 +77,18 @@
>         return 0;
>  }
>  
> -static int snd_pcm_jack_poll_revents(snd_pcm_ioplug_t *io ATTRIBUTE_UNUSED,
> +static int snd_pcm_jack_poll_revents(snd_pcm_ioplug_t *io,
>                                      struct pollfd *pfds, unsigned int nfds,
>                                      unsigned short *revents)
>  {
>         static char buf[1];
>  
>         assert(pfds && nfds == 1 && revents);
> -
>         read(pfds[0].fd, buf, 1);
> -
> -       *revents = pfds[0].revents;
> +       *revents = pfds[0].revents & ~(POLLIN | POLLOUT);
> +        if (pfds[0].revents & POLLIN) {
> +           *revents |= (io->stream == SND_PCM_STREAM_PLAYBACK) ? POLLOUT : POLLIN;
> +       }
>         return 0;
>  }
>  
> 
> 
> Ciao,
> 
> 
> -- 
> FA
> 
> Vor uns liegt ein weites Tal, die Sonne scheint - ein Glitzerstrahl.
> 
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