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[media] v4l: add V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME

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Some drivers also need a control like
V4L2_CID_MPEG_MFC51_VIDEO_FORCE_FRAME_TYPE to force an encoder
key frame. Add a general V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME
so the new drivers and applications can use it.

Signed-off-by: Wu-Cheng Li <wuchengli@chromium.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Wu-Cheng Li 2016-01-19 05:07:09 -02:00 committed by Mauro Carvalho Chehab
parent 3e71da19f9
commit cedc12108b
3 changed files with 11 additions and 0 deletions
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8
Documentation/DocBook/media/v4l/controls.xml
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@ -2329,6 +2329,14 @@ to search and match for the present Macroblock (MB) in the reference picture. Th
vertical search range for motion estimation module in video encoder.</entry>
</row>
<row><entry></entry></row>
<row id="v4l2-mpeg-video-force-key-frame">
<entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME</constant>&nbsp;</entry>
<entry>button</entry>
</row><row><entry spanname="descr">Force a key frame for the next queued buffer. Applicable to encoders.
This is a general, codec-agnostic keyframe control.</entry>
</row>
<row><entry></entry></row>
<row>
<entry spanname="id"><constant>V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE</constant>&nbsp;</entry>

2
drivers/media/v4l2-core/v4l2-ctrls.c
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@ -758,6 +758,7 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE: return "Horizontal MV Search Range";
case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE: return "Vertical MV Search Range";
case V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER: return "Repeat Sequence Header";
case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME: return "Force Key Frame";
/* VPX controls */
case V4L2_CID_MPEG_VIDEO_VPX_NUM_PARTITIONS: return "VPX Number of Partitions";
@ -998,6 +999,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
*type = V4L2_CTRL_TYPE_INTEGER;
break;
case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
case V4L2_CID_PAN_RESET:
case V4L2_CID_TILT_RESET:
case V4L2_CID_FLASH_STROBE:

1
include/uapi/linux/v4l2-controls.h
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@ -390,6 +390,7 @@ enum v4l2_mpeg_video_multi_slice_mode {
#define V4L2_CID_MPEG_VIDEO_REPEAT_SEQ_HEADER (V4L2_CID_MPEG_BASE+226)
#define V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE (V4L2_CID_MPEG_BASE+227)
#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_H263_I_FRAME_QP (V4L2_CID_MPEG_BASE+300)
#define V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP (V4L2_CID_MPEG_BASE+301)