Hi Vandana,
I did some testing with several webcams and there is only one more thing
to do:
On 9/24/19 11:14 AM, Vandana BN wrote:
> Print UVC Metadata information in verbose mode.
>
> Signed-off-by: Vandana BN <bnvandana@xxxxxxxxx>
> ---
> Changes since v6:
> Not to print PTS/SCR if not present.
> Remove loop in print_meta_buffer()
> Changes since v5:
> Use proper print format.
> split fprintf.
> Changes since v4:
> Print PTS and SCR info.
> ---
> utils/v4l2-ctl/v4l2-ctl-meta.cpp | 39 +++++++++++++++++++++++++++
> utils/v4l2-ctl/v4l2-ctl-streaming.cpp | 14 +++++-----
> utils/v4l2-ctl/v4l2-ctl.h | 1 +
> 3 files changed, 48 insertions(+), 6 deletions(-)
>
> diff --git a/utils/v4l2-ctl/v4l2-ctl-meta.cpp b/utils/v4l2-ctl/v4l2-ctl-meta.cpp
> index 75fbd6f4..eae7438f 100644
> --- a/utils/v4l2-ctl/v4l2-ctl-meta.cpp
> +++ b/utils/v4l2-ctl/v4l2-ctl-meta.cpp
> @@ -127,3 +127,42 @@ void meta_list(cv4l_fd &fd)
> print_video_formats(fd, V4L2_BUF_TYPE_META_OUTPUT);
> }
> }
> +
> +struct vivid_uvc_meta_buf {
> + __u64 ns;
> + __u16 sof;
> + __u8 length;
> + __u8 flags;
> + __u8 buf[10];
> +};
> +
> +#define UVC_STREAM_SCR (1 << 3)
> +#define UVC_STREAM_PTS (1 << 2)
> +
> +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;
> +
> + switch (fmt.g_pixelformat()) {
> + case V4L2_META_FMT_UVC:
> + fprintf(f, "UVC: ");
> + vbuf = (vivid_uvc_meta_buf *)q.g_dataptr(buf.g_index(), 0);
> +
> + fprintf(f, "%.6fs sof: %4d len: %u flags: 0x%02x",
> + (double)vbuf->ns / 1000000000.0,
> + vbuf->sof,
> + vbuf->length,
> + vbuf->flags);
> + if (vbuf->flags & UVC_STREAM_PTS) {
> + fprintf(f, " PTS: %u", le32toh(*(__u32*)(vbuf->buf)));
> + buf_off = 4;
> + }
> + if (vbuf->flags & UVC_STREAM_SCR)
> + fprintf(f, " STC: %u SOF counter: %u",
> + le32toh(*(__u32*)(vbuf->buf + buf_off)),
> + le16toh(*(__u16*)(vbuf->buf + buf_off + 4)));
> + fprintf(f, "\n");
> + break;
> + }
> +}
> diff --git a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
> index 11157434..46d53f23 100644
> --- a/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
> +++ b/utils/v4l2-ctl/v4l2-ctl-streaming.cpp
> @@ -540,9 +540,9 @@ static void print_buffer(FILE *f, struct v4l2_buffer &buf)
> fprintf(f, "\n");
> }
>
> -static void print_concise_buffer(FILE *f, cv4l_buffer &buf,
> - fps_timestamps &fps_ts, int comp_perc,
> - bool skip_ts = false)
> +static void print_concise_buffer(FILE *f, cv4l_buffer &buf, cv4l_fmt &fmt,
> + cv4l_queue &q, fps_timestamps &fps_ts,
> + int comp_perc, bool skip_ts = false)
> {
> static double last_ts;
>
> @@ -592,6 +592,8 @@ static void print_concise_buffer(FILE *f, cv4l_buffer &buf,
> if (fl)
> fprintf(f, " (%s)", bufferflags2s(fl).c_str());
> fprintf(f, "\n");
> + if (v4l_type_is_meta(buf.g_type()))
Don't call print_meta_buffer if V4L2_BUF_FLAG_ERROR is set, or if bytesused == 0, since
in that case the buffer doesn't contain valid data.
> + print_meta_buffer(f, buf, fmt, q);
> }
>
> static void stream_buf_caps(cv4l_fd &fd, unsigned buftype)
> @@ -1390,7 +1392,7 @@ static int do_handle_cap(cv4l_fd &fd, cv4l_queue &q, FILE *fout, int *index,
> if (!(buf.g_flags() & V4L2_BUF_FLAG_ERROR))
> break;
> if (verbose)
> - print_concise_buffer(stderr, buf, fps_ts, -1);
> + print_concise_buffer(stderr, buf, fmt, q, fps_ts, -1);
> if (fd.qbuf(buf))
> return QUEUE_ERROR;
> }
> @@ -1412,7 +1414,7 @@ static int do_handle_cap(cv4l_fd &fd, cv4l_queue &q, FILE *fout, int *index,
> else if (buf.g_flags() & V4L2_BUF_FLAG_BFRAME)
> ch = 'B';
> if (verbose) {
> - print_concise_buffer(stderr, buf, fps_ts,
> + print_concise_buffer(stderr, buf, fmt, q, fps_ts,
> host_fd_to >= 0 ? 100 - comp_perc / comp_perc_count : -1);
> comp_perc_count = comp_perc = 0;
> }
> @@ -1502,7 +1504,7 @@ static int do_handle_out(cv4l_fd &fd, cv4l_queue &q, FILE *fin, cv4l_buffer *cap
> double ts_secs = buf.g_timestamp().tv_sec + buf.g_timestamp().tv_usec / 1000000.0;
> fps_ts.add_ts(ts_secs, buf.g_sequence(), buf.g_field());
> if (verbose)
> - print_concise_buffer(stderr, buf, fps_ts, -1);
> + print_concise_buffer(stderr, buf, fmt, q, fps_ts, -1);
>
> for (unsigned j = 0; j < buf.g_num_planes(); j++)
> buf.s_bytesused(buf.g_length(j), j);
> diff --git a/utils/v4l2-ctl/v4l2-ctl.h b/utils/v4l2-ctl/v4l2-ctl.h
> index 5797d784..36051566 100644
> --- a/utils/v4l2-ctl/v4l2-ctl.h
> +++ b/utils/v4l2-ctl/v4l2-ctl.h
> @@ -406,6 +406,7 @@ void meta_cmd(int ch, char *optarg);
> 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);
>
> // v4l2-ctl-subdev.cpp
> void subdev_usage(void);
>
