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Subject: media: v4l2-ctrls: Add control for AUD generation
Author:  Stanimir Varbanov <[email protected]>
Date:    Tue Nov 24 01:01:37 2020 +0100

Add a control to enable inserting of AUD NALU into encoded
bitstream.

Reviewed-by: Hans Verkuil <[email protected]>
Signed-off-by: Stanimir Varbanov <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>

 Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst | 5 +++++
 drivers/media/v4l2-core/v4l2-ctrls.c                      | 2 ++
 include/uapi/linux/v4l2-controls.h                        | 1 +
 3 files changed, 8 insertions(+)

---

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst 
b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index 86b23caf4be1..9963c1c9a4d5 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -694,6 +694,11 @@ enum v4l2_mpeg_video_frame_skip_mode -
     of display order, in addition the hardware may still be using the
     returned buffer as a reference picture for subsequent frames.
 
+``V4L2_CID_MPEG_VIDEO_AU_DELIMITER (boolean)``
+    If enabled then, AUD (Access Unit Delimiter) NALUs will be generated.
+    That could be useful to find the start of a frame without having to
+    fully parse each NALU. Applicable to the H264 and HEVC encoders.
+
 ``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)``
     Enable writing sample aspect ratio in the Video Usability
     Information. Applicable to the H264 encoder.
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c 
b/drivers/media/v4l2-core/v4l2-ctrls.c
index 524e7abeba89..ca50e21e2838 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -876,6 +876,7 @@ const char *v4l2_ctrl_get_name(u32 id)
        case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:               return "Frame 
Skip Mode";
        case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY:             return "Display 
Delay";
        case V4L2_CID_MPEG_VIDEO_DEC_DISPLAY_DELAY_ENABLE:      return "Display 
Delay Enable";
+       case V4L2_CID_MPEG_VIDEO_AU_DELIMITER:                  return 
"Generate Access Unit Delimiters";
        case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP:               return "H263 
I-Frame QP Value";
        case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP:               return "H263 
P-Frame QP Value";
        case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP:               return "H263 
B-Frame QP Value";
@@ -1250,6 +1251,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum 
v4l2_ctrl_type *type,
        case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
        case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
        case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER:
+       case V4L2_CID_MPEG_VIDEO_AU_DELIMITER:
        case V4L2_CID_WIDE_DYNAMIC_RANGE:
        case V4L2_CID_IMAGE_STABILIZATION:
        case V4L2_CID_RDS_RECEPTION:
diff --git a/include/uapi/linux/v4l2-controls.h 
b/include/uapi/linux/v4l2-controls.h
index 987fbd946e4c..6f8c08507bf4 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -428,6 +428,7 @@ enum v4l2_mpeg_video_multi_slice_mode {
 #define V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE          
(V4L2_CID_CODEC_BASE+228)
 #define V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME            
(V4L2_CID_CODEC_BASE+229)
 #define V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID      
(V4L2_CID_CODEC_BASE+230)
+#define V4L2_CID_MPEG_VIDEO_AU_DELIMITER               
(V4L2_CID_CODEC_BASE+231)
 
 /* CIDs for the MPEG-2 Part 2 (H.262) codec */
 #define V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL                        
(V4L2_CID_CODEC_BASE+270)

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