[Linux-kernel-mentees] [PATCH] v4l2-ctl: support for metadata output

Vandana BN bnvandana at gmail.com
Thu Oct 3 07:06:15 UTC 2019


Adds support to test metadata output format V4L2_META_FMT_VIVID.

Signed-off-by: Vandana BN <bnvandana at gmail.com>
---
 contrib/freebsd/include/linux/videodev2.h |  1 +
 include/linux/videodev2.h                 |  1 +
 utils/v4l2-ctl/v4l2-ctl-meta.cpp          | 31 +++++++++++++++++++++++
 utils/v4l2-ctl/v4l2-ctl-streaming.cpp     | 12 ++++++---
 utils/v4l2-ctl/v4l2-ctl.h                 |  1 +
 5 files changed, 43 insertions(+), 3 deletions(-)

diff --git a/contrib/freebsd/include/linux/videodev2.h b/contrib/freebsd/include/linux/videodev2.h
index 0c12d27f..d14ca0aa 100644
--- a/contrib/freebsd/include/linux/videodev2.h
+++ b/contrib/freebsd/include/linux/videodev2.h
@@ -783,6 +783,7 @@ struct v4l2_pix_format {
 #define V4L2_META_FMT_VSP1_HGT    v4l2_fourcc('V', 'S', 'P', 'T') /* R-Car VSP1 2-D Histogram */
 #define V4L2_META_FMT_UVC         v4l2_fourcc('U', 'V', 'C', 'H') /* UVC Payload Header metadata */
 #define V4L2_META_FMT_D4XX        v4l2_fourcc('D', '4', 'X', 'X') /* D4XX Payload Header metadata */
+#define V4L2_META_FMT_VIVID       v4l2_fourcc('V', 'I', 'V', 'D') /* Vivid Output Metadata */
 
 /* priv field value to indicates that subsequent fields are valid. */
 #define V4L2_PIX_FMT_PRIV_MAGIC		0xfeedcafe
diff --git a/include/linux/videodev2.h b/include/linux/videodev2.h
index e2847759..be4727da 100644
--- a/include/linux/videodev2.h
+++ b/include/linux/videodev2.h
@@ -749,6 +749,7 @@ struct v4l2_pix_format {
 #define V4L2_META_FMT_VSP1_HGT    v4l2_fourcc('V', 'S', 'P', 'T') /* R-Car VSP1 2-D Histogram */
 #define V4L2_META_FMT_UVC         v4l2_fourcc('U', 'V', 'C', 'H') /* UVC Payload Header metadata */
 #define V4L2_META_FMT_D4XX        v4l2_fourcc('D', '4', 'X', 'X') /* D4XX Payload Header metadata */
+#define V4L2_META_FMT_VIVID       v4l2_fourcc('V', 'I', 'V', 'D') /* Vivid Output Metadata */
 
 /* priv field value to indicates that subsequent fields are valid. */
 #define V4L2_PIX_FMT_PRIV_MAGIC		0xfeedcafe
diff --git a/utils/v4l2-ctl/v4l2-ctl-meta.cpp b/utils/v4l2-ctl/v4l2-ctl-meta.cpp
index eae7438f..2b5781a7 100644
--- a/utils/v4l2-ctl/v4l2-ctl-meta.cpp
+++ b/utils/v4l2-ctl/v4l2-ctl-meta.cpp
@@ -139,10 +139,18 @@ struct vivid_uvc_meta_buf {
 #define UVC_STREAM_SCR	(1 << 3)
 #define UVC_STREAM_PTS	(1 << 2)
 
+struct vivid_meta_out_buf {
+        __u8      brightness;
+        __u8      contrast;
+        __u8      saturation;
+        __s16     hue;
+};
+
 void print_meta_buffer(FILE *f, cv4l_buffer &buf, cv4l_fmt &fmt, cv4l_queue &q)
 {
 	struct vivid_uvc_meta_buf *vbuf;
 	int buf_off = 0;
+	struct vivid_meta_out_buf *vbuf_out;
 
 	switch (fmt.g_pixelformat()) {
 	case V4L2_META_FMT_UVC:
@@ -164,5 +172,28 @@ void print_meta_buffer(FILE *f, cv4l_buffer &buf, cv4l_fmt &fmt, cv4l_queue &q)
 				le16toh(*(__u16*)(vbuf->buf + buf_off + 4)));
 		fprintf(f, "\n");
 		break;
+	case V4L2_META_FMT_VIVID:
+		fprintf(f, "VIVID:");
+		vbuf_out = (vivid_meta_out_buf *)q.g_dataptr(buf.g_index(), 0);
+
+		fprintf(f, " brightness: %u", vbuf_out->brightness);
+		fprintf(f, " contrast: %u", vbuf_out->contrast);
+		fprintf(f, " saturation: %u", vbuf_out->saturation);
+		fprintf(f, " hue: %d\n", vbuf_out->hue);
+		break;
+	}
+}
+
+void meta_fillbuffer(int idx, cv4l_fmt &fmt, cv4l_queue &q)
+{
+	struct vivid_meta_out_buf *vbuf;
+	switch (fmt.g_pixelformat()) {
+		case V4L2_META_FMT_VIVID:
+			vbuf = (vivid_meta_out_buf *)q.g_dataptr(idx, 0);
+			vbuf->brightness = 228;
+			vbuf->contrast = 228;
+			vbuf->saturation = 228;
+			vbuf->hue = 100;
+			break;
 	}
 }
diff --git a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
index 47b7d3f8..fc82d483 100644
--- a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
+++ b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
@@ -1146,6 +1146,7 @@ static int do_setup_out_buffers(cv4l_fd &fd, cv4l_queue &q, FILE *fin, bool qbuf
 	bool can_fill = false;
 	bool is_video = q.g_type() == V4L2_BUF_TYPE_VIDEO_OUTPUT ||
 			q.g_type() == V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
+	bool is_meta = q.g_type() == V4L2_BUF_TYPE_META_OUTPUT;
 
 	if (q.obtain_bufs(&fd))
 		return QUEUE_ERROR;
@@ -1177,7 +1178,6 @@ static int do_setup_out_buffers(cv4l_fd &fd, cv4l_queue &q, FILE *fin, bool qbuf
 	if (V4L2_FIELD_HAS_T_OR_B(field))
 		output_field = (stream_out_std & V4L2_STD_525_60) ?
 			V4L2_FIELD_BOTTOM : V4L2_FIELD_TOP;
-
 	if (is_video) {
 		tpg_init(&tpg, 640, 360);
 		tpg_alloc(&tpg, fmt.g_width());
@@ -1244,6 +1244,9 @@ static int do_setup_out_buffers(cv4l_fd &fd, cv4l_queue &q, FILE *fin, bool qbuf
 		if (fin && !fill_buffer_from_file(fd, q, buf, fmt, fin))
 			return QUEUE_STOPPED;
 
+		if (is_meta)
+			meta_fillbuffer(i, fmt, q);
+
 		if (fmt.g_pixelformat() == V4L2_PIX_FMT_FWHT_STATELESS) {
 			int media_fd = mi_get_media_fd(fd.g_fd());
 
@@ -1266,7 +1269,6 @@ static int do_setup_out_buffers(cv4l_fd &fd, cv4l_queue &q, FILE *fin, bool qbuf
 		}
 		if (qbuf) {
 			fps_timestamps fps_ts;
-
 			set_time_stamp(buf);
 			if (fd.qbuf(buf))
 				return QUEUE_ERROR;
@@ -1480,6 +1482,7 @@ static int do_handle_out(cv4l_fd &fd, cv4l_queue &q, FILE *fin, cv4l_buffer *cap
 			 bool stopped, bool ignore_count_skip)
 {
 	cv4l_buffer buf(q);
+	bool is_meta = q.g_type() == V4L2_BUF_TYPE_META_OUTPUT;
 	int ret = 0;
 
 	if (cap) {
@@ -1522,6 +1525,7 @@ static int do_handle_out(cv4l_fd &fd, cv4l_queue &q, FILE *fin, cv4l_buffer *cap
 			fprintf(stderr, ", dropped buffers: %u", dropped);
 		fprintf(stderr, "\n");
 	}
+
 	if (stopped)
 		return 0;
 
@@ -1542,6 +1546,8 @@ static int do_handle_out(cv4l_fd &fd, cv4l_queue &q, FILE *fin, cv4l_buffer *cap
 			tpg_fillbuffer(&tpg, stream_out_std, j,
 				       (u8 *)q.g_dataptr(buf.g_index(), j));
 	}
+	if (is_meta)
+		meta_fillbuffer(buf.g_index(), fmt, q);
 
 	if (fmt.g_pixelformat() == V4L2_PIX_FMT_FWHT_STATELESS) {
 		if (ioctl(buf.g_request_fd(), MEDIA_REQUEST_IOC_REINIT, NULL)) {
@@ -2039,7 +2045,7 @@ static void streaming_set_out(cv4l_fd &fd, cv4l_fd &exp_fd)
 
 	if (!(capabilities & (V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_VIDEO_OUTPUT_MPLANE |
 			      V4L2_CAP_VBI_OUTPUT | V4L2_CAP_SLICED_VBI_OUTPUT |
-			      V4L2_CAP_SDR_OUTPUT |
+			      V4L2_CAP_SDR_OUTPUT | V4L2_CAP_META_OUTPUT |
 			      V4L2_CAP_VIDEO_M2M | V4L2_CAP_VIDEO_M2M_MPLANE))) {
 		fprintf(stderr, "unsupported stream type\n");
 		return;
diff --git a/utils/v4l2-ctl/v4l2-ctl.h b/utils/v4l2-ctl/v4l2-ctl.h
index 2c861d82..a12a2ba7 100644
--- a/utils/v4l2-ctl/v4l2-ctl.h
+++ b/utils/v4l2-ctl/v4l2-ctl.h
@@ -409,6 +409,7 @@ void meta_set(cv4l_fd &fd);
 void meta_get(cv4l_fd &fd);
 void meta_list(cv4l_fd &fd);
 void print_meta_buffer(FILE *f, cv4l_buffer &buf, cv4l_fmt &fmt, cv4l_queue &q);
+void meta_fillbuffer(int idx, cv4l_fmt &fmt, cv4l_queue &q);
 
 // v4l2-ctl-subdev.cpp
 void subdev_usage(void);
-- 
2.17.1



More information about the Linux-kernel-mentees mailing list