These flag are added
* V4L2_CID_MPEG_VIDEO_VFR_ENABLE
* V4L2_CID_MPEG_VIDEO_VFR_MIN_FRAMERATE
One is to set variable frame rate enable or not, another is to control
minimal frame rate that video encoder should keep per second.
Signed-off-by: Fish Lin <linfish@xxxxxxxxxx>
---
Documentation/media/uapi/v4l/ext-ctrls-codec.rst | 9 +++++++++
drivers/media/v4l2-core/v4l2-ctrls.c | 3 +++
include/uapi/linux/v4l2-controls.h | 3 +++
3 files changed, 15 insertions(+)
diff --git a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
index c97fb7923be5..4bc013d71b67 100644
--- a/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
+++ b/Documentation/media/uapi/v4l/ext-ctrls-codec.rst
@@ -620,7 +620,16 @@ enum v4l2_mpeg_video_bitrate_mode -
* - Bit 24:31
- Must be zero.
+.. _v4l2-mpeg-video-variable-framerate:
+``V4L2_CID_MPEG_VIDEO_VFR_ENABLE (boolean)``
+ Set variable framerate enable or not. When enabled, video encoder is able
+ to drop frames based on some mechanism, like frame similarity or bitrate
+ control (default disable).
+
+``V4L2_CID_MPEG_VIDEO_VFR_MIN_FRAMERATE (integer)``
+ Minimal kept frame per second when variable framerate is enabled (default
+ is input framerate).
.. _v4l2-mpeg-video-dec-pts:
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index b79d3bbd8350..566c6552c9a0 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -786,6 +786,8 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
+ case V4L2_CID_MPEG_VIDEO_VFR_ENABLE: return "Variable Frame Rate Enable";
+ case V4L2_CID_MPEG_VIDEO_VFR_MIN_FRAMERATE: return "VFR Minimal Frame Rate";
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";
@@ -1108,6 +1110,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
+ case V4L2_CID_MPEG_VIDEO_VFR_ENABLE:
case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
case V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE:
case V4L2_CID_MPEG_VIDEO_MPEG4_QPEL:
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 06479f2fb3ae..f1bf52eb0152 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_MPEG_VIDEO_VFR_ENABLE (V4L2_CID_MPEG_BASE + 250)
+#define V4L2_CID_MPEG_VIDEO_VFR_MIN_FRAMERATE (V4L2_CID_MPEG_BASE + 251)
+
#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)
--
2.21.0.225.g810b269d1ac-goog
