Effect of CONFIG_SND_PCM_OSS_PLUGINS

Effect of CONFIG_SND_PCM_OSS_PLUGINS

[Adrian McMenamin]

Unless CONFIG_SND_PCM_OSS_PLUGINS is set then with my driver the
userspace (and OSS) app mpg123 doesn't work properly - not outputting
any sound.

Is this likely to be a problem with my driver or with the app?

Adrian

Re: Effect of CONFIG_SND_PCM_OSS_PLUGINS

[Clemens Ladisch]

Adrian McMenamin wrote:
> Unless CONFIG_SND_PCM_OSS_PLUGINS is set then with my driver the
> userspace (and OSS) app mpg123 doesn't work properly - not outputting
> any sound.

This symbol enables (limited) automatic sample rate/format conversion.

Apparently, your sound device does not support any of mpg123's supported
sample formats.

> Is this likely to be a problem with my driver or with the app?

I would say that the problem is the missing CONFIG_SND_PCM_OSS_PLUGINS.
;-)

Well, your driver does support S16_LE, doesn't it?


Regards,
Clemens

Re: Effect of CONFIG_SND_PCM_OSS_PLUGINS

[Adrian McMenamin]

On 25/07/07, Clemens Ladisch <cladisch@fastmail.net> wrote:
> Adrian McMenamin wrote:
> > Unless CONFIG_SND_PCM_OSS_PLUGINS is set then with my driver the
> > userspace (and OSS) app mpg123 doesn't work properly - not outputting
> > any sound.
>
> This symbol enables (limited) automatic sample rate/format conversion.
>
> Apparently, your sound device does not support any of mpg123's supported
> sample formats.
>
> > Is this likely to be a problem with my driver or with the app?
>
> I would say that the problem is the missing CONFIG_SND_PCM_OSS_PLUGINS.
> ;-)
>
> Well, your driver does support S16_LE, doesn't it?
>
>
I think so

.formats =
	    (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
	     SNDRV_PCM_FMTBIT_IMA_ADPCM),

Re: Effect of CONFIG_SND_PCM_OSS_PLUGINS

[Clemens Ladisch]

Adrian McMenamin wrote:
> On 25/07/07, Clemens Ladisch <cladisch@fastmail.net> wrote:
> > Well, your driver does support S16_LE, doesn't it?
> 
> I think so
> 
> .formats =
> 	    (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
> 	     SNDRV_PCM_FMTBIT_IMA_ADPCM),

Looks OK.

What are the other snd_pcm_hardware settings?


Regards,
Clemens

Re: Effect of CONFIG_SND_PCM_OSS_PLUGINS

[Adrian McMenamin]

On 27/07/07, Clemens Ladisch <cladisch@fastmail.net> wrote:
> Adrian McMenamin wrote:
> > On 25/07/07, Clemens Ladisch <cladisch@fastmail.net> wrote:
> > > Well, your driver does support S16_LE, doesn't it?
> >
> > I think so
> >
> > .formats =
> >           (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
> >            SNDRV_PCM_FMTBIT_IMA_ADPCM),
>
> Looks OK.
>
> What are the other snd_pcm_hardware settings?
>

static struct snd_pcm_hardware snd_pcm_aica_playback_hw = {
	.info = (SNDRV_PCM_INFO_NONINTERLEAVED),
	.formats =
	    (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
	     SNDRV_PCM_FMTBIT_IMA_ADPCM),
	.rates = SNDRV_PCM_RATE_8000_48000,
	.rate_min = 8000,
	.rate_max = 48000,
	.channels_min = 1,
	.channels_max = 2,
	.buffer_bytes_max = AICA_BUFFER_SIZE,
	.period_bytes_min = AICA_PERIOD_SIZE,
	.period_bytes_max = AICA_PERIOD_SIZE,
	.periods_min = AICA_PERIOD_NUMBER,
	.periods_max = AICA_PERIOD_NUMBER,
};

#define AICA_BUFFER_SIZE 0x8000
#define AICA_PERIOD_SIZE 0x800
#define AICA_PERIOD_NUMBER 16

Re: Effect of CONFIG_SND_PCM_OSS_PLUGINS

[Takashi Iwai]

At Fri, 27 Jul 2007 08:15:13 +0100,
Adrian McMenamin wrote:
> 
> On 27/07/07, Clemens Ladisch <cladisch@fastmail.net> wrote:
> > Adrian McMenamin wrote:
> > > On 25/07/07, Clemens Ladisch <cladisch@fastmail.net> wrote:
> > > > Well, your driver does support S16_LE, doesn't it?
> > >
> > > I think so
> > >
> > > .formats =
> > >           (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
> > >            SNDRV_PCM_FMTBIT_IMA_ADPCM),
> >
> > Looks OK.
> >
> > What are the other snd_pcm_hardware settings?
> >
> 
> static struct snd_pcm_hardware snd_pcm_aica_playback_hw = {
> 	.info = (SNDRV_PCM_INFO_NONINTERLEAVED),

This one.


Takashi

Re: Effect of CONFIG_SND_PCM_OSS_PLUGINS

[Adrian McMenamin]

On 27/07/07, Takashi Iwai <tiwai@suse.de> wrote:
> At Fri, 27 Jul 2007 08:15:13 +0100,
> Adrian McMenamin wrote:
> >
> > On 27/07/07, Clemens Ladisch <cladisch@fastmail.net> wrote:
> > > Adrian McMenamin wrote:
> > > > On 25/07/07, Clemens Ladisch <cladisch@fastmail.net> wrote:
> > > > > Well, your driver does support S16_LE, doesn't it?
> > > >
> > > > I think so
> > > >
> > > > .formats =
> > > >           (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
> > > >            SNDRV_PCM_FMTBIT_IMA_ADPCM),
> > >
> > > Looks OK.
> > >
> > > What are the other snd_pcm_hardware settings?
> > >
> >
> > static struct snd_pcm_hardware snd_pcm_aica_playback_hw = {
> >       .info = (SNDRV_PCM_INFO_NONINTERLEAVED),
>
> This one.
>
Sorry. "This one" what? Is this the reason why mpg123 has difficulties
without the plugin? As long as it is not a fault with the driver as
opposed to a reflection of the hardware, then I am happy.

Re: Effect of CONFIG_SND_PCM_OSS_PLUGINS

[Takashi Iwai]

At Fri, 27 Jul 2007 10:50:29 +0100,
Adrian McMenamin wrote:
> 
> On 27/07/07, Takashi Iwai <tiwai@suse.de> wrote:
> > At Fri, 27 Jul 2007 08:15:13 +0100,
> > Adrian McMenamin wrote:
> > >
> > > On 27/07/07, Clemens Ladisch <cladisch@fastmail.net> wrote:
> > > > Adrian McMenamin wrote:
> > > > > On 25/07/07, Clemens Ladisch <cladisch@fastmail.net> wrote:
> > > > > > Well, your driver does support S16_LE, doesn't it?
> > > > >
> > > > > I think so
> > > > >
> > > > > .formats =
> > > > >           (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE |
> > > > >            SNDRV_PCM_FMTBIT_IMA_ADPCM),
> > > >
> > > > Looks OK.
> > > >
> > > > What are the other snd_pcm_hardware settings?
> > > >
> > >
> > > static struct snd_pcm_hardware snd_pcm_aica_playback_hw = {
> > >       .info = (SNDRV_PCM_INFO_NONINTERLEAVED),
> >
> > This one.
> >
> Sorry. "This one" what? Is this the reason why mpg123 has difficulties
> without the plugin? As long as it is not a fault with the driver as
> opposed to a reflection of the hardware, then I am happy.

You need a conversion from INTERLEAVED to NONINTERLEAVED.


Takashi