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video/convertframe: Add crop meta support via videocrop

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=759329
This commit is contained in:
Song Bing 2015-12-11 21:42:00 +08:00 committed by Sebastian Dröge
parent f0db396e63
commit a476145797
1 changed files with 56 additions and 9 deletions
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65
gst-libs/gst/video/convertframe.c
View file

@ -110,12 +110,23 @@ fail:
static GstElement *
build_convert_frame_pipeline (GstElement ** src_element,
GstElement ** sink_element, const GstCaps * from_caps,
const GstCaps * to_caps, GError ** err)
GstVideoCropMeta * cmeta, const GstCaps * to_caps, GError ** err)
{
GstElement *src = NULL, *csp = NULL, *vscale = NULL;
GstElement *sink = NULL, *encoder = NULL, *pipeline;
GstElement *vcrop = NULL, *csp = NULL, *csp2 = NULL, *vscale = NULL;
GstElement *src = NULL, *sink = NULL, *encoder = NULL, *pipeline;
GstVideoInfo info;
GError *error = NULL;
if (cmeta) {
if (!create_element ("videocrop", &vcrop, &error)) {
g_warning
("build_convert_frame_pipeline: Buffer has crop metadata but videocrop element is not found. Cropping will be disabled");
} else {
if (!create_element ("videoconvert", &csp2, &error))
goto no_elements;
}
}
/* videoscale is here to correct for the pixel-aspect-ratio for us */
GST_DEBUG ("creating elements");
if (!create_element ("appsrc", &src, &error) ||
@ -133,15 +144,42 @@ build_convert_frame_pipeline (GstElement ** src_element,
GST_DEBUG ("adding elements");
gst_bin_add_many (GST_BIN (pipeline), src, csp, vscale, sink, NULL);
if (vcrop)
gst_bin_add_many (GST_BIN (pipeline), vcrop, csp2, NULL);
/* set caps */
g_object_set (src, "caps", from_caps, NULL);
if (vcrop) {
gst_video_info_from_caps (&info, from_caps);
g_object_set (vcrop, "left", cmeta->x, NULL);
g_object_set (vcrop, "top", cmeta->y, NULL);
g_object_set (vcrop, "right", GST_VIDEO_INFO_WIDTH (&info) - cmeta->width,
NULL);
g_object_set (vcrop, "bottom",
GST_VIDEO_INFO_HEIGHT (&info) - cmeta->height, NULL);
GST_DEBUG ("crop meta [x,y,width,height]: %d %d %d %d", cmeta->x, cmeta->y,
cmeta->width, cmeta->height);
}
g_object_set (sink, "caps", to_caps, NULL);
/* FIXME: linking is still way too expensive, profile this properly */
GST_DEBUG ("linking src->csp");
if (!gst_element_link_pads (src, "src", csp, "sink"))
goto link_failed;
if (vcrop) {
GST_DEBUG ("linking src->csp2");
if (!gst_element_link_pads (src, "src", csp2, "sink"))
goto link_failed;
GST_DEBUG ("linking csp2->vcrop");
if (!gst_element_link_pads (csp2, "src", vcrop, "sink"))
goto link_failed;
GST_DEBUG ("linking vcrop->csp");
if (!gst_element_link_pads (vcrop, "src", csp, "sink"))
goto link_failed;
} else {
GST_DEBUG ("linking src->csp");
if (!gst_element_link_pads (src, "src", csp, "sink"))
goto link_failed;
}
GST_DEBUG ("linking csp->vscale");
if (!gst_element_link_pads_full (csp, "src", vscale, "sink",
@ -193,8 +231,12 @@ no_elements:
{
if (src)
gst_object_unref (src);
if (vcrop)
gst_object_unref (vcrop);
if (csp)
gst_object_unref (csp);
if (csp2)
gst_object_unref (csp2);
if (vscale)
gst_object_unref (vscale);
if (sink)
@ -209,7 +251,11 @@ no_elements:
no_pipeline:
{
gst_object_unref (src);
if (vcrop)
gst_object_unref (vcrop);
gst_object_unref (csp);
if (csp2)
gst_object_unref (csp2);
gst_object_unref (vscale);
gst_object_unref (sink);
@ -282,7 +328,8 @@ gst_video_convert_sample (GstSample * sample, const GstCaps * to_caps,
}
pipeline =
build_convert_frame_pipeline (&src, &sink, from_caps, to_caps_copy, &err);
build_convert_frame_pipeline (&src, &sink, from_caps,
gst_buffer_get_video_crop_meta (buf), to_caps_copy, &err);
if (!pipeline)
goto no_pipeline;
@ -646,8 +693,8 @@ gst_video_convert_sample_async (GstSample * sample,
}
pipeline =
build_convert_frame_pipeline (&src, &sink, from_caps, to_caps_copy,
&error);
build_convert_frame_pipeline (&src, &sink, from_caps,
gst_buffer_get_video_crop_meta (buf), to_caps_copy, &error);
if (!pipeline)
goto no_pipeline;