[media] v4l: add V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME

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>

diff --git a/Documentation/DocBook/media/v4l/controls.xml b/Documentation/DocBook/media/v4l/controls.xml
index 7a771492f2a5e80c1ca1fc16280caecbfd209e8b..361040e6b0f41aa0234372a33a38a59b719c6fe5 100644 (file)
--- a/Documentation/DocBook/media/v4l/controls.xml
+++ b/Documentation/DocBook/media/v4l/controls.xml
@@ -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>

diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 130e5badd5992bcfa9987cea07795eff749214d1..8b321e0aae62e2725357efc998054ef71d205e01 100644 (file)
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -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:

diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 2ae5c3ea179bc223db553e58b525237c9b4dad1c..b6a357a5f0532339835a4d18a0653fdb3a70908f 100644 (file)
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -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)