[PATCH] media: v4l2-ctrls: add control for dpcm predictor

[PATCH] media: v4l2-ctrls: add control for dpcm predictor

[Prabhakar Lad]

From: Lad, Prabhakar <prabhakar.lad@ti.com>

add V4L2_CID_DPCM_PREDICTOR control of type menu, which
determines the dpcm predictor. The predictor can be either
simple or advanced.

Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Cc: Sakari Ailus <sakari.ailus@iki.fi>
Cc: Hans Verkuil <hans.verkuil@cisco.com>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Hans de Goede <hdegoede@redhat.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
---
 This patches has one checkpatch warning for line over
 80 characters altough it can be avoided I have kept it
 for consistency.

 drivers/media/v4l2-core/v4l2-ctrls.c |    9 +++++++++
 include/linux/videodev2.h            |    5 +++++
 2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index b6a2ee7..2d7bc15 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -425,6 +425,11 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
 		"Gray",
 		NULL,
 	};
+	static const char * const dpcm_predictor[] = {
+		"Simple Predictor",
+		"Advanced Predictor",
+		NULL,
+	};
 
 	switch (id) {
 	case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
@@ -502,6 +507,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
 		return mpeg4_profile;
 	case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
 		return jpeg_chroma_subsampling;
+	case V4L2_CID_DPCM_PREDICTOR:
+		return dpcm_predictor;
 
 	default:
 		return NULL;
@@ -732,6 +739,7 @@ const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_IMAGE_PROC_CLASS:		return "Image Processing Controls";
 	case V4L2_CID_LINK_FREQ:		return "Link Frequency";
 	case V4L2_CID_PIXEL_RATE:		return "Pixel Rate";
+	case V4L2_CID_DPCM_PREDICTOR:		return "DPCM Predictor";
 
 	default:
 		return NULL;
@@ -832,6 +840,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 	case V4L2_CID_ISO_SENSITIVITY_AUTO:
 	case V4L2_CID_EXPOSURE_METERING:
 	case V4L2_CID_SCENE_MODE:
+	case V4L2_CID_DPCM_PREDICTOR:
 		*type = V4L2_CTRL_TYPE_MENU;
 		break;
 	case V4L2_CID_LINK_FREQ:
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index 6d6dfa7..4edb941 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -2000,6 +2000,11 @@ enum v4l2_jpeg_chroma_subsampling {
 
 #define V4L2_CID_LINK_FREQ			(V4L2_CID_IMAGE_PROC_CLASS_BASE + 1)
 #define V4L2_CID_PIXEL_RATE			(V4L2_CID_IMAGE_PROC_CLASS_BASE + 2)
+#define V4L2_CID_DPCM_PREDICTOR			(V4L2_CID_IMAGE_PROC_CLASS_BASE + 3)
+enum v4l2_dpcm_predictor {
+	V4L2_DPCM_PREDICTOR_SIMPLE	= 0,
+	V4L2_DPCM_PREDICTOR_ADVANCE	= 1,
+};
 
 /*
  *	T U N I N G
-- 
1.7.0.4

Re: [PATCH] media: v4l2-ctrls: add control for dpcm predictor

[Sylwester Nawrocki]

Hi Prabhakar,

On 08/29/2012 02:31 PM, Prabhakar Lad wrote:
> From: Lad, Prabhakar <prabhakar.lad@ti.com>
> 
> add V4L2_CID_DPCM_PREDICTOR control of type menu, which
> determines the dpcm predictor. The predictor can be either
> simple or advanced.

Thanks for the patch. I was expecting to find some information about
this new control in its DocBook documentation, but this part seems
to be missing here. :) Could you please add relevant entries in
Documentation/DocBook/media/v4l/controls.xml as well ?

--

Regards,
Sylwester

Re: [PATCH] media: v4l2-ctrls: add control for dpcm predictor

[Prabhakar Lad]

Hi Sylwester,

On Wednesday 29 August 2012 06:13 PM, Sylwester Nawrocki wrote:
> Hi Prabhakar,
> 
> On 08/29/2012 02:31 PM, Prabhakar Lad wrote:
>> From: Lad, Prabhakar <prabhakar.lad@ti.com>
>>
>> add V4L2_CID_DPCM_PREDICTOR control of type menu, which
>> determines the dpcm predictor. The predictor can be either
>> simple or advanced.
> 
> Thanks for the patch. I was expecting to find some information about
> this new control in its DocBook documentation, but this part seems
> to be missing here. :) Could you please add relevant entries in
> Documentation/DocBook/media/v4l/controls.xml as well ?
> 
Thanks for the catch :) I'll add it for v2.

Thanks and Regards,
--Prabhakar

> --
> 
> Regards,
> Sylwester
> 

Re: [PATCH] media: v4l2-ctrls: add control for dpcm predictor

[Sakari Ailus]

Hi Prabhakar,

Thanks for the patch.

On Wed, Aug 29, 2012 at 06:01:07PM +0530, Prabhakar Lad wrote:
> From: Lad, Prabhakar <prabhakar.lad@ti.com>
> 
> add V4L2_CID_DPCM_PREDICTOR control of type menu, which
> determines the dpcm predictor. The predictor can be either
> simple or advanced.
> 
> Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
> Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
> Cc: Sakari Ailus <sakari.ailus@iki.fi>
> Cc: Hans Verkuil <hans.verkuil@cisco.com>
> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
> Cc: Hans de Goede <hdegoede@redhat.com>
> Cc: Kyungmin Park <kyungmin.park@samsung.com>
> ---
>  This patches has one checkpatch warning for line over
>  80 characters altough it can be avoided I have kept it
>  for consistency.
> 
>  drivers/media/v4l2-core/v4l2-ctrls.c |    9 +++++++++
>  include/linux/videodev2.h            |    5 +++++
>  2 files changed, 14 insertions(+), 0 deletions(-)
> 
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index b6a2ee7..2d7bc15 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -425,6 +425,11 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
>  		"Gray",
>  		NULL,
>  	};
> +	static const char * const dpcm_predictor[] = {
> +		"Simple Predictor",
> +		"Advanced Predictor",
> +		NULL,
> +	};
>  
>  	switch (id) {
>  	case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
> @@ -502,6 +507,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
>  		return mpeg4_profile;
>  	case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
>  		return jpeg_chroma_subsampling;
> +	case V4L2_CID_DPCM_PREDICTOR:
> +		return dpcm_predictor;
>  
>  	default:
>  		return NULL;
> @@ -732,6 +739,7 @@ const char *v4l2_ctrl_get_name(u32 id)
>  	case V4L2_CID_IMAGE_PROC_CLASS:		return "Image Processing Controls";
>  	case V4L2_CID_LINK_FREQ:		return "Link Frequency";
>  	case V4L2_CID_PIXEL_RATE:		return "Pixel Rate";
> +	case V4L2_CID_DPCM_PREDICTOR:		return "DPCM Predictor";
>  
>  	default:
>  		return NULL;
> @@ -832,6 +840,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>  	case V4L2_CID_ISO_SENSITIVITY_AUTO:
>  	case V4L2_CID_EXPOSURE_METERING:
>  	case V4L2_CID_SCENE_MODE:
> +	case V4L2_CID_DPCM_PREDICTOR:
>  		*type = V4L2_CTRL_TYPE_MENU;
>  		break;
>  	case V4L2_CID_LINK_FREQ:
> diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
> index 6d6dfa7..4edb941 100644
> --- a/include/linux/videodev2.h
> +++ b/include/linux/videodev2.h
> @@ -2000,6 +2000,11 @@ enum v4l2_jpeg_chroma_subsampling {
>  
>  #define V4L2_CID_LINK_FREQ			(V4L2_CID_IMAGE_PROC_CLASS_BASE + 1)
>  #define V4L2_CID_PIXEL_RATE			(V4L2_CID_IMAGE_PROC_CLASS_BASE + 2)
> +#define V4L2_CID_DPCM_PREDICTOR			(V4L2_CID_IMAGE_PROC_CLASS_BASE + 3)
> +enum v4l2_dpcm_predictor {
> +	V4L2_DPCM_PREDICTOR_SIMPLE	= 0,
> +	V4L2_DPCM_PREDICTOR_ADVANCE	= 1,
> +};

s/ADVANCE/ADVANCED/ perhaps?

To add to Sylwester's comment on the documentation, I think this control
belongs to the image processing controls class.

Kind regards,

-- 
Sakari Ailus
e-mail: sakari.ailus@iki.fi	XMPP: sailus@retiisi.org.uk

Re: [PATCH] media: v4l2-ctrls: add control for dpcm predictor

[Prabhakar Lad]

Hi Sakari,

Thanks for the review.

On Wed, Aug 29, 2012 at 7:51 PM, Sakari Ailus <sakari.ailus@iki.fi> wrote:
> Hi Prabhakar,
>
> Thanks for the patch.
>
> On Wed, Aug 29, 2012 at 06:01:07PM +0530, Prabhakar Lad wrote:
>> From: Lad, Prabhakar <prabhakar.lad@ti.com>
>>
>> add V4L2_CID_DPCM_PREDICTOR control of type menu, which
>> determines the dpcm predictor. The predictor can be either
>> simple or advanced.
>>
>> Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
>> Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
>> Cc: Sakari Ailus <sakari.ailus@iki.fi>
>> Cc: Hans Verkuil <hans.verkuil@cisco.com>
>> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
>> Cc: Mauro Carvalho Chehab <mchehab@infradead.org>
>> Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
>> Cc: Hans de Goede <hdegoede@redhat.com>
>> Cc: Kyungmin Park <kyungmin.park@samsung.com>
>> ---
>>  This patches has one checkpatch warning for line over
>>  80 characters altough it can be avoided I have kept it
>>  for consistency.
>>
>>  drivers/media/v4l2-core/v4l2-ctrls.c |    9 +++++++++
>>  include/linux/videodev2.h            |    5 +++++
>>  2 files changed, 14 insertions(+), 0 deletions(-)
>>
>> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
>> index b6a2ee7..2d7bc15 100644
>> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
>> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
>> @@ -425,6 +425,11 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
>>               "Gray",
>>               NULL,
>>       };
>> +     static const char * const dpcm_predictor[] = {
>> +             "Simple Predictor",
>> +             "Advanced Predictor",
>> +             NULL,
>> +     };
>>
>>       switch (id) {
>>       case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
>> @@ -502,6 +507,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
>>               return mpeg4_profile;
>>       case V4L2_CID_JPEG_CHROMA_SUBSAMPLING:
>>               return jpeg_chroma_subsampling;
>> +     case V4L2_CID_DPCM_PREDICTOR:
>> +             return dpcm_predictor;
>>
>>       default:
>>               return NULL;
>> @@ -732,6 +739,7 @@ const char *v4l2_ctrl_get_name(u32 id)
>>       case V4L2_CID_IMAGE_PROC_CLASS:         return "Image Processing Controls";
>>       case V4L2_CID_LINK_FREQ:                return "Link Frequency";
>>       case V4L2_CID_PIXEL_RATE:               return "Pixel Rate";
>> +     case V4L2_CID_DPCM_PREDICTOR:           return "DPCM Predictor";
>>
>>       default:
>>               return NULL;
>> @@ -832,6 +840,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>>       case V4L2_CID_ISO_SENSITIVITY_AUTO:
>>       case V4L2_CID_EXPOSURE_METERING:
>>       case V4L2_CID_SCENE_MODE:
>> +     case V4L2_CID_DPCM_PREDICTOR:
>>               *type = V4L2_CTRL_TYPE_MENU;
>>               break;
>>       case V4L2_CID_LINK_FREQ:
>> diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
>> index 6d6dfa7..4edb941 100644
>> --- a/include/linux/videodev2.h
>> +++ b/include/linux/videodev2.h
>> @@ -2000,6 +2000,11 @@ enum v4l2_jpeg_chroma_subsampling {
>>
>>  #define V4L2_CID_LINK_FREQ                   (V4L2_CID_IMAGE_PROC_CLASS_BASE + 1)
>>  #define V4L2_CID_PIXEL_RATE                  (V4L2_CID_IMAGE_PROC_CLASS_BASE + 2)
>> +#define V4L2_CID_DPCM_PREDICTOR                      (V4L2_CID_IMAGE_PROC_CLASS_BASE + 3)
>> +enum v4l2_dpcm_predictor {
>> +     V4L2_DPCM_PREDICTOR_SIMPLE      = 0,
>> +     V4L2_DPCM_PREDICTOR_ADVANCE     = 1,
>> +};
>
> s/ADVANCE/ADVANCED/ perhaps?
>
Ok I'll make it ADVANCED.

> To add to Sylwester's comment on the documentation, I think this control
> belongs to the image processing controls class.
>
I have added it as part of image processing control class itself
(#define V4L2_CID_DPCM_PREDICTOR  (V4L2_CID_IMAGE_PROC_CLASS_BASE + 3)),
 I'll include the same in documentation as well.

Thanks and Regards,
--Prabhakar Lad

> Kind regards,
>
> --
> Sakari Ailus
> e-mail: sakari.ailus@iki.fi     XMPP: sailus@retiisi.org.uk
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