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Subject[PATCH 1/2] v4l2-ctrl: Add decoder conceal color control
Date
Add decoder v4l2 control to set conceal color.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
.../media/v4l/ext-ctrls-codec.rst | 20 +++++++++++++++++++
drivers/media/v4l2-core/v4l2-ctrls.c | 9 +++++++++
include/uapi/linux/v4l2-controls.h | 1 +
3 files changed, 30 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index 00944e97d638..994650052333 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -674,6 +674,26 @@ 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 conceal color in YUV color space. It describes the
+ client preference of error conceal color in case of error where
+ reference frame is missing. The decoder would paint the reference
+ buffer with preferred color and use it for future decoding.
+ Applicable to decoders.
+
+.. flat-table::
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - Bit 0:15
+ - Y luminance
+ * - Bit 16:31
+ - Cb chrominance
+ * - Bit 32:47
+ - Cr chrominance
+ * - Bit 48:63
+ - Must be zero
+
``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.
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index 016cf6204cbb..a3b9d28a00b7 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -945,6 +945,7 @@ 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";
@@ -1430,6 +1431,14 @@ 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 8bit 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;
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 039c0d7add1b..5e5a3068be2d 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -428,6 +428,7 @@ enum v4l2_mpeg_video_multi_slice_mode {
#define V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE (V4L2_CID_CODEC_BASE+228)
#define V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME (V4L2_CID_CODEC_BASE+229)
#define V4L2_CID_MPEG_VIDEO_BASELAYER_PRIORITY_ID (V4L2_CID_CODEC_BASE+230)
+#define V4L2_CID_MPEG_VIDEO_DEC_CONCEAL_COLOR (V4L2_CID_CODEC_BASE+231)

/* CIDs for the MPEG-2 Part 2 (H.262) codec */
#define V4L2_CID_MPEG_VIDEO_MPEG2_LEVEL (V4L2_CID_CODEC_BASE+270)
--
2.25.1
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