linux-kernel - [PATCH 3/4] media: uapi: hevc: Add segment address field

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Date:   Sat, 26 Oct 2019 19:47:02 +0200
From:   Jernej Skrabec <jernej.skrabec@...l.net>
To:     mripard@...nel.org, paul.kocialkowski@...tlin.com
Cc:     mchehab@...nel.org, hverkuil-cisco@...all.nl,
        gregkh@...uxfoundation.org, wens@...e.org, p.zabel@...gutronix.de,
        ezequiel@...labora.com, boris.brezillon@...labora.com,
        linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-sunxi@...glegroups.com
Subject: [PATCH 3/4] media: uapi: hevc: Add segment address field

If HEVC frame consists of multiple slices, segment address has to be
known in order to properly decode it.

Add segment address field to slice parameters.

Signed-off-by: Jernej Skrabec <jernej.skrabec@...l.net>
---
 Documentation/media/uapi/v4l/ext-ctrls-codec.rst | 5 ++++-
 include/media/hevc-ctrls.h                       | 5 ++++-
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
index 382e85e16444..99e4a7099614 100644
--- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
+++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
@@ -3971,6 +3971,9 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
     * - __u32
       - ``data_bit_offset``
       - Offset (in bits) to the video data in the current slice data.
+    * - __u32
+      - ``slice_segment_addr``
+      -
     * - __u8
       - ``nal_unit_type``
       -
@@ -4048,7 +4051,7 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
       - ``num_rps_poc_lt_curr``
       - The number of reference pictures in the long-term set.
     * - __u8
-      - ``padding[7]``
+      - ``padding[5]``
       - Applications and drivers must set this to zero.
     * - struct :c:type:`v4l2_hevc_dpb_entry`
       - ``dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
diff --git a/include/media/hevc-ctrls.h b/include/media/hevc-ctrls.h
index 1592e52c3614..3e2e32098312 100644
--- a/include/media/hevc-ctrls.h
+++ b/include/media/hevc-ctrls.h
@@ -167,6 +167,9 @@ struct v4l2_ctrl_hevc_slice_params {
 	__u32	bit_size;
 	__u32	data_bit_offset;
 
+	/* ISO/IEC 23008-2, ITU-T Rec. H.265: General slice segment header */
+	__u32	slice_segment_addr;
+
 	/* ISO/IEC 23008-2, ITU-T Rec. H.265: NAL unit header */
 	__u8	nal_unit_type;
 	__u8	nuh_temporal_id_plus1;
@@ -200,7 +203,7 @@ struct v4l2_ctrl_hevc_slice_params {
 	__u8	num_rps_poc_st_curr_after;
 	__u8	num_rps_poc_lt_curr;
 
-	__u8	padding;
+	__u8	padding[5];
 
 	/* ISO/IEC 23008-2, ITU-T Rec. H.265: General slice segment header */
 	struct v4l2_hevc_dpb_entry dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
-- 
2.23.0