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media: v4l2-ctrl: Add frame-skip std encoder control
Adds encoders standard v4l2 control for frame-skip. The control is a copy of a custom encoder control so that other v4l2 encoder drivers can use it. Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org> Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Stanimir Varbanov
Mauro Carvalho Chehab
parent
69ff4b2caa
commit
44f5b2fffc
3 changed files with 54 additions and 0 deletions
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@ -602,6 +602,40 @@ enum v4l2_mpeg_video_bitrate_mode -
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Encoder will decide the appropriate quantization parameter and
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bitrate to produce requested frame quality.
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``V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE (enum)``
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enum v4l2_mpeg_video_frame_skip_mode -
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Indicates in what conditions the encoder should skip frames. If
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encoding a frame would cause the encoded stream to be larger then a
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chosen data limit then the frame will be skipped. Possible values
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are:
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.. tabularcolumns:: |p{9.2cm}|p{8.3cm}|
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.. raw:: latex
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\small
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.. flat-table::
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:header-rows: 0
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:stub-columns: 0
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* - ``V4L2_MPEG_FRAME_SKIP_MODE_DISABLED``
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- Frame skip mode is disabled.
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* - ``V4L2_MPEG_FRAME_SKIP_MODE_LEVEL_LIMIT``
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- Frame skip mode enabled and buffer limit is set by the chosen
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level and is defined by the standard.
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* - ``V4L2_MPEG_FRAME_SKIP_MODE_BUF_LIMIT``
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- Frame skip mode enabled and buffer limit is set by the
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:ref:`VBV (MPEG1/2/4) <v4l2-mpeg-video-vbv-size>` or
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:ref:`CPB (H264) buffer size <v4l2-mpeg-video-h264-cpb-size>` control.
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.. raw:: latex
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\normalsize
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``V4L2_CID_MPEG_VIDEO_TEMPORAL_DECIMATION (integer)``
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For every captured frame, skip this many subsequent frames (default
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0).
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@ -1173,6 +1207,8 @@ enum v4l2_mpeg_video_h264_entropy_mode -
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Quantization parameter for an B frame for MPEG4. Valid range: from 1
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to 31.
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.. _v4l2-mpeg-video-vbv-size:
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``V4L2_CID_MPEG_VIDEO_VBV_SIZE (integer)``
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The Video Buffer Verifier size in kilobytes, it is used as a
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limitation of frame skip. The VBV is defined in the standard as a
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@ -1210,6 +1246,8 @@ enum v4l2_mpeg_video_h264_entropy_mode -
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Force a key frame for the next queued buffer. Applicable to
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encoders. This is a general, codec-agnostic keyframe control.
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.. _v4l2-mpeg-video-h264-cpb-size:
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``V4L2_CID_MPEG_VIDEO_H264_CPB_SIZE (integer)``
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The Coded Picture Buffer size in kilobytes, it is used as a
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limitation of frame skip. The CPB is defined in the H264 standard as
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@ -591,6 +591,12 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
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"External",
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NULL,
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};
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static const char * const mpeg_video_frame_skip[] = {
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"Disabled",
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"Level Limit",
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"VBV/CPB Limit",
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NULL,
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};
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switch (id) {
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case V4L2_CID_MPEG_AUDIO_SAMPLING_FREQ:
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@ -652,6 +658,8 @@ const char * const *v4l2_ctrl_get_menu(u32 id)
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return flash_strobe_source;
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case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
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return header_mode;
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case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:
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return mpeg_video_frame_skip;
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case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
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return multi_slice;
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case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
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@ -846,6 +854,7 @@ const char *v4l2_ctrl_get_name(u32 id)
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case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE: return "H264 MB Level Rate Control";
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case V4L2_CID_MPEG_VIDEO_HEADER_MODE: return "Sequence Header Mode";
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case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC: return "Max Number of Reference Pics";
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case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE: return "Frame Skip Mode";
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case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP: return "H263 I-Frame QP Value";
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case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP: return "H263 P-Frame QP Value";
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case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP: return "H263 B-Frame QP Value";
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@ -1268,6 +1277,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
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case V4L2_CID_FLASH_LED_MODE:
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case V4L2_CID_FLASH_STROBE_SOURCE:
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case V4L2_CID_MPEG_VIDEO_HEADER_MODE:
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case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:
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case V4L2_CID_MPEG_VIDEO_MULTI_SLICE_MODE:
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case V4L2_CID_MPEG_VIDEO_H264_ENTROPY_MODE:
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case V4L2_CID_MPEG_VIDEO_H264_LEVEL:
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@ -744,6 +744,12 @@ enum v4l2_cid_mpeg_video_hevc_size_of_length_field {
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#define V4L2_CID_MPEG_VIDEO_REF_NUMBER_FOR_PFRAMES (V4L2_CID_MPEG_BASE + 643)
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#define V4L2_CID_MPEG_VIDEO_PREPEND_SPSPPS_TO_IDR (V4L2_CID_MPEG_BASE + 644)
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#define V4L2_CID_MPEG_VIDEO_CONSTANT_QUALITY (V4L2_CID_MPEG_BASE + 645)
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#define V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE (V4L2_CID_MPEG_BASE + 646)
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enum v4l2_mpeg_video_frame_skip_mode {
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V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_DISABLED = 0,
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V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT = 1,
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V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT = 2,
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};
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/* MPEG-class control IDs specific to the CX2341x driver as defined by V4L2 */
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#define V4L2_CID_MPEG_CX2341X_BASE (V4L2_CTRL_CLASS_MPEG | 0x1000)
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