linux-kernel - [PATCH v2 2/2] media: v4l2-ctrl: Add layer wise bitrate controls for h264

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Date:   Mon, 21 Sep 2020 18:34:00 +0530
From:   Dikshita Agarwal <dikshita@...eaurora.org>
To:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org
Cc:     mchehab@...nel.org, hverkuil-cisco@...all.nl,
        ezequiel@...labora.com, stanimir.varbanov@...aro.org,
        vgarodia@...eaurora.org, majja@...eaurora.org,
        Dikshita Agarwal <dikshita@...eaurora.org>
Subject: [PATCH v2 2/2] media: v4l2-ctrl: Add layer wise bitrate controls for h264

Adds bitrate control for all coding layers for h264
same as hevc.

Signed-off-by: Dikshita Agarwal <dikshita@...eaurora.org>
---
 .../userspace-api/media/v4l/ext-ctrls-codec.rst      | 20 ++++++++++++++++++++
 drivers/media/v4l2-core/v4l2-ctrls.c                 |  7 +++++++
 include/uapi/linux/v4l2-controls.h                   |  8 ++++++++
 3 files changed, 35 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index 26f8220..690b066 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -1513,6 +1513,26 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
     * - Bit 16:32
       - Layer number
 
+``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L0_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 0 for H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L1_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 1 for H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L2_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 2 for H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L3_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 3 for H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L4_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 4 for H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L5_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 5 for H264 encoder.
+
+``V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L6_BR (integer)``
+    Indicates bit rate for hierarchical coding layer 6 for H264 encoder.
 
 .. _v4l2-mpeg-h264:
 
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index abef73e..9296294 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -922,6 +922,13 @@ const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP:		return "H264 P-Frame Maximum QP Value";
 	case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MIN_QP:		return "H264 B-Frame Minimum QP Value";
 	case V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MAX_QP:		return "H264 B-Frame Maximum QP Value";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L0_BR:	return "H264 Hierarchical Lay 0 BitRate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L1_BR:	return "H264 Hierarchical Lay 1 BitRate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L2_BR:	return "H264 Hierarchical Lay 2 BitRate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L3_BR:	return "H264 Hierarchical Lay 3 BitRate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L4_BR:	return "H264 Hierarchical Lay 4 BitRate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L5_BR:	return "H264 Hierarchical Lay 5 BitRate";
+	case V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L6_BR:	return "H264 Hierarchical Lay 6 BitRate";
 	case V4L2_CID_MPEG_VIDEO_H264_SPS:			return "H264 Sequence Parameter Set";
 	case V4L2_CID_MPEG_VIDEO_H264_PPS:			return "H264 Picture Parameter Set";
 	case V4L2_CID_MPEG_VIDEO_H264_SCALING_MATRIX:		return "H264 Scaling Matrix";
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 7ba05fe..b869b54 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -580,12 +580,20 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type {
 #define V4L2_CID_MPEG_VIDEO_H264_P_FRAME_MAX_QP	(V4L2_CID_MPEG_BASE+388)
 #define V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MIN_QP	(V4L2_CID_MPEG_BASE+389)
 #define V4L2_CID_MPEG_VIDEO_H264_B_FRAME_MAX_QP	(V4L2_CID_MPEG_BASE+390)
+#define V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L0_BR	(V4L2_CID_MPEG_BASE + 391)
+#define V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L1_BR	(V4L2_CID_MPEG_BASE + 392)
+#define V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L2_BR	(V4L2_CID_MPEG_BASE + 393)
+#define V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L3_BR	(V4L2_CID_MPEG_BASE + 394)
+#define V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L4_BR	(V4L2_CID_MPEG_BASE + 395)
+#define V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L5_BR	(V4L2_CID_MPEG_BASE + 396)
+#define V4L2_CID_MPEG_VIDEO_H264_HIER_CODING_L6_BR	(V4L2_CID_MPEG_BASE + 397)
 #define V4L2_CID_MPEG_VIDEO_MPEG4_I_FRAME_QP	(V4L2_CID_MPEG_BASE+400)
 #define V4L2_CID_MPEG_VIDEO_MPEG4_P_FRAME_QP	(V4L2_CID_MPEG_BASE+401)
 #define V4L2_CID_MPEG_VIDEO_MPEG4_B_FRAME_QP	(V4L2_CID_MPEG_BASE+402)
 #define V4L2_CID_MPEG_VIDEO_MPEG4_MIN_QP	(V4L2_CID_MPEG_BASE+403)
 #define V4L2_CID_MPEG_VIDEO_MPEG4_MAX_QP	(V4L2_CID_MPEG_BASE+404)
 #define V4L2_CID_MPEG_VIDEO_MPEG4_LEVEL		(V4L2_CID_MPEG_BASE+405)
+
 enum v4l2_mpeg_video_mpeg4_level {
 	V4L2_MPEG_VIDEO_MPEG4_LEVEL_0	= 0,
 	V4L2_MPEG_VIDEO_MPEG4_LEVEL_0B	= 1,
-- 
1.9.1