Re: [daisy, master 2/2] gstreamer1.0-plugins-good: optimize delay in v4l2src

[Karthik Ramanan <a0393906@ti.com>]

On further thought, I think this applies only to daisy.
Please ignore the merge request into master.

On 27-Jul-15 3:54 PM, Karthik Ramanan wrote:
> Signed-off-by: Karthik Ramanan <a0393906@ti.com>
> ---
>   ...0002-gstv4l2src-Optimize-delay-in-capture.patch |   31 ++++++++++++++++++++
>   .../gstreamer1.0-plugins-good_1.2.3.bbappend       |    5 ++--
>   2 files changed, 34 insertions(+), 2 deletions(-)
>   create mode 100644 meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good/0002-gstv4l2src-Optimize-delay-in-capture.patch
>
> diff --git a/meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good/0002-gstv4l2src-Optimize-delay-in-capture.patch b/meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good/0002-gstv4l2src-Optimize-delay-in-capture.patch
> new file mode 100644
> index 0000000..07c2f24
> --- /dev/null
> +++ b/meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good/0002-gstv4l2src-Optimize-delay-in-capture.patch
> @@ -0,0 +1,31 @@
> +From e989ef6143b222df6eb79bab626fc972d6513ead Mon Sep 17 00:00:00 2001
> +From: Pooja Prajod <a0132412@ti.com>
> +Date: Wed, 4 Mar 2015 16:40:26 +0530
> +Subject: [PATCH 2/2] gstv4l2src: Optimize delay in capture
> +
> +This patch reduces the delay in capture by reducing
> +the S_FMT ioctls for determining whether its interlaced capture.
> +It assumes capture is not interlaced if driver is vip
> +
> +Signed-off-by: Pooja Prajod <a0132412@ti.com>
> +---
> + sys/v4l2/gstv4l2object.c |    3 +++
> + 1 file changed, 3 insertions(+)
> +
> +diff --git a/sys/v4l2/gstv4l2object.c b/sys/v4l2/gstv4l2object.c
> +index c3ed422..77d75c2 100644
> +--- a/sys/v4l2/gstv4l2object.c
> ++++ b/sys/v4l2/gstv4l2object.c
> +@@ -1706,6 +1706,9 @@ gst_v4l2_object_probe_caps_for_format_and_size (GstV4l2Object * v4l2object,
> +      * causes expensive and slow USB IO, so don't probe them for interlaced
> +      */
> +     interlaced = FALSE;
> ++  } else if (!strcmp ((char *) v4l2object->vcap.driver, "vip")) {
> ++    /* Interlaced detection using VIDIOC_TRY/S_FMT */
> ++    interlaced = FALSE;
> +   } else {
> +     /* Interlaced detection using VIDIOC_TRY/S_FMT */
> +     if (!gst_v4l2_object_get_nearest_size (v4l2object, pixelformat,
> +--
> +1.7.9.5
> +
> diff --git a/meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good_1.2.3.bbappend b/meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good_1.2.3.bbappend
> index 0548aa9..6b8df1d 100644
> --- a/meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good_1.2.3.bbappend
> +++ b/meta-arago-extras/recipes-multimedia/gstreamer/gstreamer1.0-plugins-good_1.2.3.bbappend
> @@ -1,6 +1,7 @@
>   FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
>
>   SRC_URI_append = " \
> -        file://0001-Adds-GST_V4L2_IO_DMABUF-mode-support-in-capture.patch"
> +        file://0001-Adds-GST_V4L2_IO_DMABUF-mode-support-in-capture.patch \
> +        file://0002-gstv4l2src-Optimize-delay-in-capture.patch"
>
> -PR_append = "-arago0"
> +PR_append = "-arago1"
>