diff mbox series

[v4,19/21] media: vicodec: Introducing stateless fwht defs and structs

Message ID 20190225222210.121713-10-dafna3@gmail.com (mailing list archive)
State New, archived
Headers show
Series add support to stateless decoder | expand

Commit Message

Dafna Hirschfeld Feb. 25, 2019, 10:22 p.m. UTC 
Add structs and definitions needed to implement stateless
decoder for fwht.

Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
---
 drivers/media/platform/vicodec/vicodec-core.c | 23 ++++++++-----
 drivers/media/v4l2-core/v4l2-ctrls.c          | 10 ++++++
 include/media/fwht-ctrls.h                    | 32 +++++++++++++++++++
 include/media/v4l2-ctrls.h                    |  4 ++-
 include/uapi/linux/v4l2-controls.h            |  3 ++
 include/uapi/linux/videodev2.h                |  1 +
 6 files changed, 64 insertions(+), 9 deletions(-)
 create mode 100644 include/media/fwht-ctrls.h

Comments

Hans Verkuil Feb. 26, 2019, 9 a.m. UTC | #1 
On 2/25/19 11:22 PM, Dafna Hirschfeld wrote:
> Add structs and definitions needed to implement stateless
> decoder for fwht.
> 
> Signed-off-by: Dafna Hirschfeld <dafna3@gmail.com>
> ---
>  drivers/media/platform/vicodec/vicodec-core.c | 23 ++++++++-----
>  drivers/media/v4l2-core/v4l2-ctrls.c          | 10 ++++++
>  include/media/fwht-ctrls.h                    | 32 +++++++++++++++++++
>  include/media/v4l2-ctrls.h                    |  4 ++-
>  include/uapi/linux/v4l2-controls.h            |  3 ++
>  include/uapi/linux/videodev2.h                |  1 +
>  6 files changed, 64 insertions(+), 9 deletions(-)
>  create mode 100644 include/media/fwht-ctrls.h
> 
> diff --git a/drivers/media/platform/vicodec/vicodec-core.c b/drivers/media/platform/vicodec/vicodec-core.c
> index 5998b9e86cda..5d6f0cdc2064 100644
> --- a/drivers/media/platform/vicodec/vicodec-core.c
> +++ b/drivers/media/platform/vicodec/vicodec-core.c
> @@ -64,6 +64,10 @@ static const struct v4l2_fwht_pixfmt_info pixfmt_fwht = {
>  	V4L2_PIX_FMT_FWHT, 0, 3, 1, 1, 1, 1, 1, 0, 1
>  };
>  
> +static const struct v4l2_fwht_pixfmt_info pixfmt_stateless_fwht = {
> +	V4L2_PIX_FMT_FWHT_STATELESS, 0, 3, 1, 1, 1, 1, 1, 0, 1
> +};
> +
>  static void vicodec_dev_release(struct device *dev)
>  {
>  }
> @@ -1510,10 +1514,6 @@ static int queue_init(void *priv, struct vb2_queue *src_vq,
>  	return vb2_queue_init(dst_vq);
>  }
>  
> -#define VICODEC_CID_CUSTOM_BASE		(V4L2_CID_MPEG_BASE | 0xf000)
> -#define VICODEC_CID_I_FRAME_QP		(VICODEC_CID_CUSTOM_BASE + 0)
> -#define VICODEC_CID_P_FRAME_QP		(VICODEC_CID_CUSTOM_BASE + 1)
> -
>  static int vicodec_s_ctrl(struct v4l2_ctrl *ctrl)
>  {
>  	struct vicodec_ctx *ctx = container_of(ctrl->handler,
> @@ -1523,10 +1523,10 @@ static int vicodec_s_ctrl(struct v4l2_ctrl *ctrl)
>  	case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
>  		ctx->state.gop_size = ctrl->val;
>  		return 0;
> -	case VICODEC_CID_I_FRAME_QP:
> +	case V4L2_CID_FWHT_I_FRAME_QP:
>  		ctx->state.i_frame_qp = ctrl->val;
>  		return 0;
> -	case VICODEC_CID_P_FRAME_QP:
> +	case V4L2_CID_FWHT_P_FRAME_QP:
>  		ctx->state.p_frame_qp = ctrl->val;
>  		return 0;
>  	}
> @@ -1539,7 +1539,7 @@ static const struct v4l2_ctrl_ops vicodec_ctrl_ops = {
>  
>  static const struct v4l2_ctrl_config vicodec_ctrl_i_frame = {
>  	.ops = &vicodec_ctrl_ops,
> -	.id = VICODEC_CID_I_FRAME_QP,
> +	.id = V4L2_CID_FWHT_I_FRAME_QP,
>  	.name = "FWHT I-Frame QP Value",
>  	.type = V4L2_CTRL_TYPE_INTEGER,
>  	.min = 1,

This struct and...

> @@ -1550,7 +1550,7 @@ static const struct v4l2_ctrl_config vicodec_ctrl_i_frame = {
>  
>  static const struct v4l2_ctrl_config vicodec_ctrl_p_frame = {
>  	.ops = &vicodec_ctrl_ops,
> -	.id = VICODEC_CID_P_FRAME_QP,
> +	.id = V4L2_CID_FWHT_I_FRAME_QP,
>  	.name = "FWHT P-Frame QP Value",
>  	.type = V4L2_CTRL_TYPE_INTEGER,
>  	.min = 1,
> @@ -1559,6 +1559,13 @@ static const struct v4l2_ctrl_config vicodec_ctrl_p_frame = {
>  	.step = 1,
>  };

... and this struct can be removed since these controls are now part of the
v4l2-ctrls.c core. Use v4l2_ctrl_new_std instead of v4l2_ctrl_new_custom
to create them.

>  
> +static const struct v4l2_ctrl_config vicodec_ctrl_stateless_state = {
> +	.id		= V4L2_CID_MPEG_VIDEO_FWHT_PARAMS,
> +	.elem_size	= sizeof(struct v4l2_ctrl_fwht_params),
> +	.name		= "FWHT-Stateless State Params",
> +	.type		= V4L2_CTRL_TYPE_FWHT_PARAMS,

Drop these last two fields since the control framework will provide them.

> +};
> +
>  /*
>   * File operations
>   */
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index 54d66dbc2a31..d5027775c24a 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -849,6 +849,7 @@ const char *v4l2_ctrl_get_name(u32 id)
>  	case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:		return "Force Key Frame";
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS:		return "MPEG-2 Slice Parameters";
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION:		return "MPEG-2 Quantization Matrices";
> +	case V4L2_CID_MPEG_VIDEO_FWHT_PARAMS:			return "FWHT stateless parameters";

"FWHT Stateless Parameters" (capital S and P)

I'm missing support for V4L2_CID_FWHT_I_FRAME_QP and V4L2_CID_FWHT_P_FRAME_QP here.

>  
>  	/* VPX controls */
>  	case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:		return "VPX Number of Partitions";
> @@ -1303,6 +1304,9 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>  	case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION:
>  		*type = V4L2_CTRL_TYPE_MPEG2_QUANTIZATION;
>  		break;
> +	case V4L2_CID_MPEG_VIDEO_FWHT_PARAMS:
> +		*type = V4L2_CTRL_TYPE_FWHT_PARAMS;
> +		break;
>  	default:
>  		*type = V4L2_CTRL_TYPE_INTEGER;
>  		break;
> @@ -1669,6 +1673,9 @@ static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
>  	case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
>  		return 0;
>  
> +	case V4L2_CTRL_TYPE_FWHT_PARAMS:
> +		return 0;
> +
>  	default:
>  		return -EINVAL;
>  	}
> @@ -2249,6 +2256,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
>  	case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
>  		elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantization);
>  		break;
> +	case V4L2_CTRL_TYPE_FWHT_PARAMS:
> +		elem_size = sizeof(struct v4l2_ctrl_fwht_params);
> +		break;
>  	default:
>  		if (type < V4L2_CTRL_COMPOUND_TYPES)
>  			elem_size = sizeof(s32);
> diff --git a/include/media/fwht-ctrls.h b/include/media/fwht-ctrls.h
> new file mode 100644
> index 000000000000..0aee2782f49c
> --- /dev/null
> +++ b/include/media/fwht-ctrls.h
> @@ -0,0 +1,32 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * These are the FWHT state controls for use with stateless FWHT
> + * codec drivers.
> + *
> + * It turns out that these structs are not stable yet and will undergo
> + * more changes. So keep them private until they are stable and ready to
> + * become part of the official public API.
> + */
> +
> +#ifndef _FWHT_CTRLS_H_
> +#define _FWHT_CTRLS_H_
> +
> +#define V4L2_CTRL_TYPE_FWHT_PARAMS 0x0105
> +
> +#define V4L2_CID_MPEG_VIDEO_FWHT_PARAMS	(V4L2_CID_MPEG_BASE + 292)
> +
> +struct v4l2_ctrl_fwht_params {
> +	__u64 backward_ref_ts;
> +	__u32 version;
> +	__u32 width;
> +	__u32 height;
> +	__u32 flags;
> +	__u32 colorspace;
> +	__u32 xfer_func;
> +	__u32 ycbcr_enc;
> +	__u32 quantization;
> +	__u32 comp_frame_size;
> +};
> +
> +
> +#endif
> diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
> index c40dcf79b5b9..4dad20658feb 100644
> --- a/include/media/v4l2-ctrls.h
> +++ b/include/media/v4l2-ctrls.h
> @@ -23,10 +23,11 @@
>  #include <media/media-request.h>
>  
>  /*
> - * Include the mpeg2 stateless codec compound control definitions.
> + * Include the mpeg2 and fwht stateless codec compound control definitions.
>   * This will move to the public headers once this API is fully stable.
>   */
>  #include <media/mpeg2-ctrls.h>
> +#include <media/fwht-ctrls.h>
>  
>  /* forward references */
>  struct file;
> @@ -60,6 +61,7 @@ union v4l2_ctrl_ptr {
>  	char *p_char;
>  	struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
>  	struct v4l2_ctrl_mpeg2_quantization *p_mpeg2_quantization;
> +	struct v4l2_ctrl_fwht_params *p_fwht_params;
>  	void *p;
>  };
>  
> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> index 06479f2fb3ae..e6c16a79f718 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -404,6 +404,9 @@ enum v4l2_mpeg_video_multi_slice_mode {
>  #define V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE		(V4L2_CID_MPEG_BASE+228)
>  #define V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME		(V4L2_CID_MPEG_BASE+229)
>  

Add this comment here:

/* CIDs for the FWHT codec as used by the vicodec driver. */

> +#define V4L2_CID_FWHT_I_FRAME_QP             (V4L2_CID_MPEG_BASE + 290)
> +#define V4L2_CID_FWHT_P_FRAME_QP             (V4L2_CID_MPEG_BASE + 291)
> +
>  #define V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP		(V4L2_CID_MPEG_BASE+300)
>  #define V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP		(V4L2_CID_MPEG_BASE+301)
>  #define V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP		(V4L2_CID_MPEG_BASE+302)
> diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
> index 97e6a6a968ba..1ac3c22d883a 100644
> --- a/include/uapi/linux/videodev2.h
> +++ b/include/uapi/linux/videodev2.h
> @@ -669,6 +669,7 @@ struct v4l2_pix_format {
>  #define V4L2_PIX_FMT_VP9      v4l2_fourcc('V', 'P', '9', '0') /* VP9 */
>  #define V4L2_PIX_FMT_HEVC     v4l2_fourcc('H', 'E', 'V', 'C') /* HEVC aka H.265 */
>  #define V4L2_PIX_FMT_FWHT     v4l2_fourcc('F', 'W', 'H', 'T') /* Fast Walsh Hadamard Transform (vicodec) */
> +#define V4L2_PIX_FMT_FWHT_STATELESS     v4l2_fourcc('S', 'F', 'W', 'H') /* Stateless FWHT (vicodec) */
>  
>  /*  Vendor-specific formats   */
>  #define V4L2_PIX_FMT_CPIA1    v4l2_fourcc('C', 'P', 'I', 'A') /* cpia1 YUV */
> 

Regards,

	Hans
diff mbox series

Patch

diff --git a/drivers/media/platform/vicodec/vicodec-core.c b/drivers/media/platform/vicodec/vicodec-core.c
index 5998b9e86cda..5d6f0cdc2064 100644
--- a/drivers/media/platform/vicodec/vicodec-core.c
+++ b/drivers/media/platform/vicodec/vicodec-core.c
@@ -64,6 +64,10 @@  static const struct v4l2_fwht_pixfmt_info pixfmt_fwht = {
 	V4L2_PIX_FMT_FWHT, 0, 3, 1, 1, 1, 1, 1, 0, 1
 };
 
+static const struct v4l2_fwht_pixfmt_info pixfmt_stateless_fwht = {
+	V4L2_PIX_FMT_FWHT_STATELESS, 0, 3, 1, 1, 1, 1, 1, 0, 1
+};
+
 static void vicodec_dev_release(struct device *dev)
 {
 }
@@ -1510,10 +1514,6 @@  static int queue_init(void *priv, struct vb2_queue *src_vq,
 	return vb2_queue_init(dst_vq);
 }
 
-#define VICODEC_CID_CUSTOM_BASE		(V4L2_CID_MPEG_BASE | 0xf000)
-#define VICODEC_CID_I_FRAME_QP		(VICODEC_CID_CUSTOM_BASE + 0)
-#define VICODEC_CID_P_FRAME_QP		(VICODEC_CID_CUSTOM_BASE + 1)
-
 static int vicodec_s_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct vicodec_ctx *ctx = container_of(ctrl->handler,
@@ -1523,10 +1523,10 @@  static int vicodec_s_ctrl(struct v4l2_ctrl *ctrl)
 	case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
 		ctx->state.gop_size = ctrl->val;
 		return 0;
-	case VICODEC_CID_I_FRAME_QP:
+	case V4L2_CID_FWHT_I_FRAME_QP:
 		ctx->state.i_frame_qp = ctrl->val;
 		return 0;
-	case VICODEC_CID_P_FRAME_QP:
+	case V4L2_CID_FWHT_P_FRAME_QP:
 		ctx->state.p_frame_qp = ctrl->val;
 		return 0;
 	}
@@ -1539,7 +1539,7 @@  static const struct v4l2_ctrl_ops vicodec_ctrl_ops = {
 
 static const struct v4l2_ctrl_config vicodec_ctrl_i_frame = {
 	.ops = &vicodec_ctrl_ops,
-	.id = VICODEC_CID_I_FRAME_QP,
+	.id = V4L2_CID_FWHT_I_FRAME_QP,
 	.name = "FWHT I-Frame QP Value",
 	.type = V4L2_CTRL_TYPE_INTEGER,
 	.min = 1,
@@ -1550,7 +1550,7 @@  static const struct v4l2_ctrl_config vicodec_ctrl_i_frame = {
 
 static const struct v4l2_ctrl_config vicodec_ctrl_p_frame = {
 	.ops = &vicodec_ctrl_ops,
-	.id = VICODEC_CID_P_FRAME_QP,
+	.id = V4L2_CID_FWHT_I_FRAME_QP,
 	.name = "FWHT P-Frame QP Value",
 	.type = V4L2_CTRL_TYPE_INTEGER,
 	.min = 1,
@@ -1559,6 +1559,13 @@  static const struct v4l2_ctrl_config vicodec_ctrl_p_frame = {
 	.step = 1,
 };
 
+static const struct v4l2_ctrl_config vicodec_ctrl_stateless_state = {
+	.id		= V4L2_CID_MPEG_VIDEO_FWHT_PARAMS,
+	.elem_size	= sizeof(struct v4l2_ctrl_fwht_params),
+	.name		= "FWHT-Stateless State Params",
+	.type		= V4L2_CTRL_TYPE_FWHT_PARAMS,
+};
+
 /*
  * File operations
  */
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 54d66dbc2a31..d5027775c24a 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -849,6 +849,7 @@  const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:		return "Force Key Frame";
 	case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS:		return "MPEG-2 Slice Parameters";
 	case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION:		return "MPEG-2 Quantization Matrices";
+	case V4L2_CID_MPEG_VIDEO_FWHT_PARAMS:			return "FWHT stateless parameters";
 
 	/* VPX controls */
 	case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS:		return "VPX Number of Partitions";
@@ -1303,6 +1304,9 @@  void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 	case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTIZATION:
 		*type = V4L2_CTRL_TYPE_MPEG2_QUANTIZATION;
 		break;
+	case V4L2_CID_MPEG_VIDEO_FWHT_PARAMS:
+		*type = V4L2_CTRL_TYPE_FWHT_PARAMS;
+		break;
 	default:
 		*type = V4L2_CTRL_TYPE_INTEGER;
 		break;
@@ -1669,6 +1673,9 @@  static int std_validate(const struct v4l2_ctrl *ctrl, u32 idx,
 	case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
 		return 0;
 
+	case V4L2_CTRL_TYPE_FWHT_PARAMS:
+		return 0;
+
 	default:
 		return -EINVAL;
 	}
@@ -2249,6 +2256,9 @@  static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
 	case V4L2_CTRL_TYPE_MPEG2_QUANTIZATION:
 		elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantization);
 		break;
+	case V4L2_CTRL_TYPE_FWHT_PARAMS:
+		elem_size = sizeof(struct v4l2_ctrl_fwht_params);
+		break;
 	default:
 		if (type < V4L2_CTRL_COMPOUND_TYPES)
 			elem_size = sizeof(s32);
diff --git a/include/media/fwht-ctrls.h b/include/media/fwht-ctrls.h
new file mode 100644
index 000000000000..0aee2782f49c
--- /dev/null
+++ b/include/media/fwht-ctrls.h
@@ -0,0 +1,32 @@ 
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * These are the FWHT state controls for use with stateless FWHT
+ * codec drivers.
+ *
+ * It turns out that these structs are not stable yet and will undergo
+ * more changes. So keep them private until they are stable and ready to
+ * become part of the official public API.
+ */
+
+#ifndef _FWHT_CTRLS_H_
+#define _FWHT_CTRLS_H_
+
+#define V4L2_CTRL_TYPE_FWHT_PARAMS 0x0105
+
+#define V4L2_CID_MPEG_VIDEO_FWHT_PARAMS	(V4L2_CID_MPEG_BASE + 292)
+
+struct v4l2_ctrl_fwht_params {
+	__u64 backward_ref_ts;
+	__u32 version;
+	__u32 width;
+	__u32 height;
+	__u32 flags;
+	__u32 colorspace;
+	__u32 xfer_func;
+	__u32 ycbcr_enc;
+	__u32 quantization;
+	__u32 comp_frame_size;
+};
+
+
+#endif
diff --git a/include/media/v4l2-ctrls.h b/include/media/v4l2-ctrls.h
index c40dcf79b5b9..4dad20658feb 100644
--- a/include/media/v4l2-ctrls.h
+++ b/include/media/v4l2-ctrls.h
@@ -23,10 +23,11 @@ 
 #include <media/media-request.h>
 
 /*
- * Include the mpeg2 stateless codec compound control definitions.
+ * Include the mpeg2 and fwht stateless codec compound control definitions.
  * This will move to the public headers once this API is fully stable.
  */
 #include <media/mpeg2-ctrls.h>
+#include <media/fwht-ctrls.h>
 
 /* forward references */
 struct file;
@@ -60,6 +61,7 @@  union v4l2_ctrl_ptr {
 	char *p_char;
 	struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
 	struct v4l2_ctrl_mpeg2_quantization *p_mpeg2_quantization;
+	struct v4l2_ctrl_fwht_params *p_fwht_params;
 	void *p;
 };
 
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 06479f2fb3ae..e6c16a79f718 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -404,6 +404,9 @@  enum v4l2_mpeg_video_multi_slice_mode {
 #define V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE		(V4L2_CID_MPEG_BASE+228)
 #define V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME		(V4L2_CID_MPEG_BASE+229)
 
+#define V4L2_CID_FWHT_I_FRAME_QP             (V4L2_CID_MPEG_BASE + 290)
+#define V4L2_CID_FWHT_P_FRAME_QP             (V4L2_CID_MPEG_BASE + 291)
+
 #define V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP		(V4L2_CID_MPEG_BASE+300)
 #define V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP		(V4L2_CID_MPEG_BASE+301)
 #define V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP		(V4L2_CID_MPEG_BASE+302)
diff --git a/include/uapi/linux/videodev2.h b/include/uapi/linux/videodev2.h
index 97e6a6a968ba..1ac3c22d883a 100644
--- a/include/uapi/linux/videodev2.h
+++ b/include/uapi/linux/videodev2.h
@@ -669,6 +669,7 @@  struct v4l2_pix_format {
 #define V4L2_PIX_FMT_VP9      v4l2_fourcc('V', 'P', '9', '0') /* VP9 */
 #define V4L2_PIX_FMT_HEVC     v4l2_fourcc('H', 'E', 'V', 'C') /* HEVC aka H.265 */
 #define V4L2_PIX_FMT_FWHT     v4l2_fourcc('F', 'W', 'H', 'T') /* Fast Walsh Hadamard Transform (vicodec) */
+#define V4L2_PIX_FMT_FWHT_STATELESS     v4l2_fourcc('S', 'F', 'W', 'H') /* Stateless FWHT (vicodec) */
 
 /*  Vendor-specific formats   */
 #define V4L2_PIX_FMT_CPIA1    v4l2_fourcc('C', 'P', 'I', 'A') /* cpia1 YUV */