[alsa-devel] Query about SNDRV_PCM_FORMAT_GSM
Hi,
I see SNDRV_PCM_FORMAT_GSM is defined in asound.h. However, I do not find any reference to this macro except pcm_misc.c. I am curious how bps info(i.e 4.75 kbit/s) is passed down to the ALSA driver. Any pointers?
Thanks Patrick
At Wed, 22 Jun 2011 00:39:27 -0700, Patrick Lai wrote:
Hi,
I see SNDRV_PCM_FORMAT_GSM is defined in asound.h. However, I do not find any reference to this macro except pcm_misc.c. I am curious how bps info(i.e 4.75 kbit/s) is passed down to the ALSA driver. Any pointers?
This is a vapor format until now, just reserved for the future implementation :)
Takashi
On Wed, Jun 22, 2011 at 11:54:56AM +0200, Takashi Iwai wrote:
Patrick Lai wrote:
I see SNDRV_PCM_FORMAT_GSM is defined in asound.h. However, I do not find any reference to this macro except pcm_misc.c. I am curious how bps info(i.e 4.75 kbit/s) is passed down to the ALSA driver. Any pointers?
This is a vapor format until now, just reserved for the future implementation :)
It may make sense to handle this in a similar way to MP3s and so on - the Intel guys were working on generalising the interface in their out of tree driver to be usable for other things, though they've not posted anything yet.
At Wed, 22 Jun 2011 12:58:33 +0100, Mark Brown wrote:
On Wed, Jun 22, 2011 at 11:54:56AM +0200, Takashi Iwai wrote:
Patrick Lai wrote:
I see SNDRV_PCM_FORMAT_GSM is defined in asound.h. However, I do not find any reference to this macro except pcm_misc.c. I am curious how bps info(i.e 4.75 kbit/s) is passed down to the ALSA driver. Any pointers?
This is a vapor format until now, just reserved for the future implementation :)
It may make sense to handle this in a similar way to MP3s and so on - the Intel guys were working on generalising the interface in their out of tree driver to be usable for other things, though they've not posted anything yet.
Yeah, this has been worked since years ago, so it'd be great if it comes out finally. Then we need to settle down the proper definition of these non-standard formats.
Takashi
participants (3)
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Mark Brown -
Patrick Lai -
Takashi Iwai