Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

Hi Mark On Fri, Jul 7, 2023 at 11:13 AM Shengjiu Wang wrote: > Hi Mark > > On Tue, Jul 4, 2023 at 12:03 PM Shengjiu Wang > wrote: > >> >> >> On Tue, Jul 4, 2023 at 1:59 AM Mark Brown wrote: >> >>> On Mon, Jul 03, 2023 at 03:12:55PM +0200, Hans Verkuil wrote: >>> >>> > My main concern is that t

Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

Hi Mark On Tue, Jul 4, 2023 at 12:03 PM Shengjiu Wang wrote: > > > On Tue, Jul 4, 2023 at 1:59 AM Mark Brown wrote: > >> On Mon, Jul 03, 2023 at 03:12:55PM +0200, Hans Verkuil wrote: >> >> > My main concern is that these cross-subsystem drivers are a pain to >> > maintain. So there have to be g

Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

On Tue, Jul 4, 2023 at 1:59 AM Mark Brown wrote: > On Mon, Jul 03, 2023 at 03:12:55PM +0200, Hans Verkuil wrote: > > > My main concern is that these cross-subsystem drivers are a pain to > > maintain. So there have to be good reasons to do this. > > > Also it is kind of weird to have to use the V

Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

On Mon, Jul 3, 2023 at 9:25 PM Takashi Iwai wrote: > On Mon, 03 Jul 2023 15:12:55 +0200, > Hans Verkuil wrote: > > > > On 03/07/2023 14:53, Mark Brown wrote: > > > On Mon, Jul 03, 2023 at 02:07:10PM +0200, Takashi Iwai wrote: > > >> Shengjiu Wang wrote: > > > > > >>> There is no such memory to me

Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

Hi Sakari On Fri, Jun 30, 2023 at 6:05 PM Sakari Ailus wrote: > Hi Shengjiu, > > On Thu, Jun 29, 2023 at 09:37:48AM +0800, Shengjiu Wang wrote: > > Audio signal processing has the requirement for memory to > > memory similar as Video. > > > > This patch is to add this support in v4l2 framework,

Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

On Mon, Jul 03, 2023 at 03:12:55PM +0200, Hans Verkuil wrote: > My main concern is that these cross-subsystem drivers are a pain to > maintain. So there have to be good reasons to do this. > Also it is kind of weird to have to use the V4L2 API in userspace to > deal with a specific audio conversi

Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

On Mon, 03 Jul 2023 15:12:55 +0200, Hans Verkuil wrote: > > On 03/07/2023 14:53, Mark Brown wrote: > > On Mon, Jul 03, 2023 at 02:07:10PM +0200, Takashi Iwai wrote: > >> Shengjiu Wang wrote: > > > >>> There is no such memory to memory interface defined in ALSA.  Seems > >>> ALSA is not designed f

Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

On 03/07/2023 14:53, Mark Brown wrote: > On Mon, Jul 03, 2023 at 02:07:10PM +0200, Takashi Iwai wrote: >> Shengjiu Wang wrote: > >>> There is no such memory to memory interface defined in ALSA.  Seems >>> ALSA is not designed for M2M cases. > >> There is no restriction to implement memory-to-memo

Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

On Mon, Jul 03, 2023 at 02:07:10PM +0200, Takashi Iwai wrote: > Shengjiu Wang wrote: > > There is no such memory to memory interface defined in ALSA.  Seems > > ALSA is not designed for M2M cases. > There is no restriction to implement memory-to-memory capture in ALSA > framework. It'd be a matt

Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

On Mon, 03 Jul 2023 11:54:22 +0200, Shengjiu Wang wrote: > > > Hi Sakari > > On Fri, Jun 30, 2023 at 6:05 PM Sakari Ailus wrote: > > Hi Shengjiu, > > On Thu, Jun 29, 2023 at 09:37:48AM +0800, Shengjiu Wang wrote: > > Audio signal processing has the requirement for memory to >

Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

On 03/07/2023 11:54, Shengjiu Wang wrote: > Hi Sakari > > On Fri, Jun 30, 2023 at 6:05 PM Sakari Ailus > wrote: > > Hi Shengjiu, > > On Thu, Jun 29, 2023 at 09:37:48AM +0800, Shengjiu Wang wrote: > > Audio signal processing has the requirement for memory

Re: [PATCH 1/6] media: v4l2: Add audio capture and output support

Hi Shengjiu, On Thu, Jun 29, 2023 at 09:37:48AM +0800, Shengjiu Wang wrote: > Audio signal processing has the requirement for memory to > memory similar as Video. > > This patch is to add this support in v4l2 framework, defined > new buffer type V4L2_BUF_TYPE_AUDIO_CAPTURE and > V4L2_BUF_TYPE_AUD