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media: v4l2-ctrl: Add decoder conceal color control

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Add decoder v4l2 control to set conceal color.

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 2021-01-20 12:09:48 +01:00 committed by Mauro Carvalho Chehab
parent 15447d18b1
commit b52051a409
3 changed files with 43 additions and 0 deletions
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33
Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
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@ -674,6 +674,39 @@ enum v4l2_mpeg_video_frame_skip_mode -
is currently displayed (decoded). This value is reset to 0 whenever
the decoder is started.
``V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR (integer64)``
This control sets the conceal color in YUV color space. It describes
the client preference of the error conceal color in case of an error
where the reference frame is missing. The decoder should fill the
reference buffer with the preferred color and use it for future
decoding. The control is using 16 bits per channel.
Applicable to decoders.
.. flat-table::
:header-rows: 0
:stub-columns: 0
* -
- 8bit format
- 10bit format
- 12bit format
* - Y luminance
- Bit 0:7
- Bit 0:9
- Bit 0:11
* - Cb chrominance
- Bit 16:23
- Bit 16:25
- Bit 16:27
* - Cr chrominance
- Bit 32:39
- Bit 32:41
- Bit 32:43
* - Must be zero
- Bit 48:63
- Bit 48:63
- Bit 48:63
``V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE (boolean)``
If enabled the decoder expects to receive a single slice per buffer,
otherwise the decoder expects a single frame in per buffer.

9
drivers/media/v4l2-core/v4l2-ctrls.c
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@ -955,6 +955,7 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_MPEG_VIDEO_VBV_SIZE: return "VBV Buffer Size";
case V4L2_CID_MPEG_VIDEO_DEC_PTS: return "Video Decoder PTS";
case V4L2_CID_MPEG_VIDEO_DEC_FRAME: return "Video Decoder Frame Count";
case V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR: return "Video Decoder Conceal Color";
case V4L2_CID_MPEG_VIDEO_VBV_DELAY: return "Initial Delay for VBV Control";
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";
@ -1458,6 +1459,14 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
*max = 0x7fffffffffffffffLL;
*step = 1;
break;
case V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR:
*type = V4L2_CTRL_TYPE_INTEGER64;
*min = 0;
/* default for 8 bit black, luma is 16, chroma is 128 */
*def = 0x8000800010LL;
*max = 0xffffffffffffLL;
*step = 1;
break;
case V4L2_CID_PIXEL_RATE:
*type = V4L2_CTRL_TYPE_INTEGER64;
*flags |= V4L2_CTRL_FLAG_READ_ONLY;

1
include/uapi/linux/v4l2-controls.h
View File

@ -432,6 +432,7 @@ enum v4l2_mpeg_video_multi_slice_mode {
#define V4L2_CID_MPEG_VIDEO_LTR_COUNT (V4L2_CID_CODEC_BASE+232)
#define V4L2_CID_MPEG_VIDEO_FRAME_LTR_INDEX (V4L2_CID_CODEC_BASE+233)
#define V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES (V4L2_CID_CODEC_BASE+234)
#define V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR (V4L2_CID_CODEC_BASE+235)
/* CIDs for the MPEG-2 Part 2 (H.262) codec */
#define V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL (V4L2_CID_CODEC_BASE+270)