The CSC API (Colorspace conversion) allows userspace to try
to configure the ycbcr/hsv_enc function and the quantization
for capture devices. This patch adds support to the CSC API
in vivid.
Using the CSC API, userspace is allowed to do the following:
1. Set the ycbcr_enc function for YUV formats.
2. Set the hsv_enc function for HSV formats
3. Set the quantization for YUV and RGB formats.
Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@xxxxxxxxxxxxx>
---
.../media/test-drivers/vivid/vivid-vid-cap.c | 49 +++++++++++++++++--
.../test-drivers/vivid/vivid-vid-common.c | 20 ++++++++
2 files changed, 65 insertions(+), 4 deletions(-)
diff --git a/drivers/media/test-drivers/vivid/vivid-vid-cap.c b/drivers/media/test-drivers/vivid/vivid-vid-cap.c
index e94beef008c8..8a43d7ebe53f 100644
--- a/drivers/media/test-drivers/vivid/vivid-vid-cap.c
+++ b/drivers/media/test-drivers/vivid/vivid-vid-cap.c
@@ -549,6 +549,29 @@ int vivid_g_fmt_vid_cap(struct file *file, void *priv,
return 0;
}
+static bool vivid_is_hsv_enc_valid(__u8 hsv_enc)
+{
+ if (hsv_enc == V4L2_HSV_ENC_180 || hsv_enc == V4L2_HSV_ENC_256)
+ return true;
+ return false;
+}
+
+static bool vivid_is_ycbcr_enc_valid(__u8 ycbcr_enc)
+{
+ /* V4L2_YCBCR_ENC_SMPTE240M is the last ycbcr_enc enum */
+ if (ycbcr_enc && ycbcr_enc <= V4L2_YCBCR_ENC_SMPTE240M)
+ return true;
+ return false;
+}
+
+static bool vivid_is_quant_valid(__u8 quantization)
+{
+ if (quantization == V4L2_QUANTIZATION_FULL_RANGE ||
+ quantization == V4L2_QUANTIZATION_LIM_RANGE)
+ return true;
+ return false;
+}
+
int vivid_try_fmt_vid_cap(struct file *file, void *priv,
struct v4l2_format *f)
{
@@ -560,6 +583,7 @@ int vivid_try_fmt_vid_cap(struct file *file, void *priv,
unsigned factor = 1;
unsigned w, h;
unsigned p;
+ bool user_set_csc = !!(mp->flags & V4L2_PIX_FMT_FLAG_SET_CSC);
fmt = vivid_get_format(dev, mp->pixelformat);
if (!fmt) {
@@ -634,12 +658,23 @@ int vivid_try_fmt_vid_cap(struct file *file, void *priv,
(fmt->bit_depth[0] / fmt->vdownsampling[0]);
mp->colorspace = vivid_colorspace_cap(dev);
- if (fmt->color_enc == TGP_COLOR_ENC_HSV)
- mp->hsv_enc = vivid_hsv_enc_cap(dev);
- else
+ if (fmt->color_enc == TGP_COLOR_ENC_HSV) {
+ if (!user_set_csc || !vivid_is_hsv_enc_valid(mp->hsv_enc))
+ mp->hsv_enc = vivid_hsv_enc_cap(dev);
+ } else if (fmt->color_enc == TGP_COLOR_ENC_YCBCR) {
+ if (!user_set_csc || !vivid_is_ycbcr_enc_valid(mp->ycbcr_enc))
+ mp->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
+ } else {
mp->ycbcr_enc = vivid_ycbcr_enc_cap(dev);
+ }
mp->xfer_func = vivid_xfer_func_cap(dev);
- mp->quantization = vivid_quantization_cap(dev);
+ if (fmt->color_enc == TGP_COLOR_ENC_YCBCR ||
+ fmt->color_enc == TGP_COLOR_ENC_RGB) {
+ if (!user_set_csc || !vivid_is_quant_valid(mp->quantization))
+ mp->quantization = vivid_quantization_cap(dev);
+ } else {
+ mp->quantization = vivid_quantization_cap(dev);
+ }
memset(mp->reserved, 0, sizeof(mp->reserved));
return 0;
}
@@ -769,6 +804,12 @@ int vivid_s_fmt_vid_cap(struct file *file, void *priv,
if (vivid_is_sdtv_cap(dev))
dev->tv_field_cap = mp->field;
tpg_update_mv_step(&dev->tpg);
+ dev->tpg.quantization = mp->quantization;
+ if (dev->fmt_cap->color_enc == TGP_COLOR_ENC_YCBCR)
+ dev->tpg.ycbcr_enc = mp->ycbcr_enc;
+ else
+ dev->tpg.hsv_enc = mp->hsv_enc;
+
return 0;
}
diff --git a/drivers/media/test-drivers/vivid/vivid-vid-common.c b/drivers/media/test-drivers/vivid/vivid-vid-common.c
index 76b0be670ebb..19aacb180e67 100644
--- a/drivers/media/test-drivers/vivid/vivid-vid-common.c
+++ b/drivers/media/test-drivers/vivid/vivid-vid-common.c
@@ -920,6 +920,26 @@ int vivid_enum_fmt_vid(struct file *file, void *priv,
fmt = &vivid_formats[f->index];
f->pixelformat = fmt->fourcc;
+
+ if (f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE &&
+ f->type != V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE)
+ return 0;
+ /*
+ * For capture devices, we support the CSC API.
+ * We allow userspace to:
+ * 1. set the ycbcr_enc on yuv format
+ * 2. set the hsv_enc on hsv format
+ * 3. set the quantization on yuv and rgb formats
+ */
+ if (fmt->color_enc == TGP_COLOR_ENC_YCBCR) {
+ f->flags |= V4L2_FMT_FLAG_CSC_YCBCR_ENC;
+ f->flags |= V4L2_FMT_FLAG_CSC_QUANTIZATION;
+ } else if (fmt->color_enc == TGP_COLOR_ENC_HSV) {
+ f->flags |= V4L2_FMT_FLAG_CSC_HSV_ENC;
+ } else if (fmt->color_enc == TGP_COLOR_ENC_RGB) {
+ f->flags |= V4L2_FMT_FLAG_CSC_QUANTIZATION;
+ }
+
return 0;
}
--
2.17.1
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