static void
gst_compositor_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstCompositorPad *pad = GST_COMPOSITOR_PAD (object);
switch (prop_id) {
case PROP_PAD_XPOS:
pad->xpos = g_value_get_int (value);
break;
case PROP_PAD_YPOS:
pad->ypos = g_value_get_int (value);
break;
case PROP_PAD_WIDTH:
pad->width = g_value_get_int (value);
break;
case PROP_PAD_HEIGHT:
pad->height = g_value_get_int (value);
break;
case PROP_PAD_ALPHA:
pad->alpha = g_value_get_double (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstCaps *
_update_caps (GstVideoAggregator * vagg, GstCaps * caps)
{
GList *l;
gint best_width = -1, best_height = -1;
GstVideoInfo info;
GstCaps *ret = NULL;
gst_video_info_from_caps (&info, caps);
GST_OBJECT_LOCK (vagg);
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
GstVideoAggregatorPad *vaggpad = l->data;
GstCompositorPad *compositor_pad = GST_COMPOSITOR_PAD (vaggpad);
gint this_width, this_height;
gint width, height;
width = GST_VIDEO_INFO_WIDTH (&vaggpad->info);
height = GST_VIDEO_INFO_HEIGHT (&vaggpad->info);
if (width == 0 || height == 0)
continue;
this_width = width + MAX (compositor_pad->xpos, 0);
this_height = height + MAX (compositor_pad->ypos, 0);
if (best_width < this_width)
best_width = this_width;
if (best_height < this_height)
best_height = this_height;
}
GST_OBJECT_UNLOCK (vagg);
if (best_width > 0 && best_height > 0) {
info.width = best_width;
info.height = best_height;
if (set_functions (GST_COMPOSITOR (vagg), &info))
ret = gst_video_info_to_caps (&info);
}
return ret;
}
static void
gst_compositor_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstCompositorPad *pad = GST_COMPOSITOR_PAD (object);
switch (prop_id) {
case PROP_PAD_ZORDER:
g_value_set_uint (value, pad->zorder);
break;
case PROP_PAD_XPOS:
g_value_set_int (value, pad->xpos);
break;
case PROP_PAD_YPOS:
g_value_set_int (value, pad->ypos);
break;
case PROP_PAD_ALPHA:
g_value_set_double (value, pad->alpha);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
pad_height = gst_util_uint64_scale_int (pad_width, dar_d, dar_n);
} else {
pad_width = gst_util_uint64_scale_int (pad_height, dar_n, dar_d);
}
*width = pad_width;
*height = pad_height;
}
static gboolean
gst_compositor_pad_set_info (GstVideoAggregatorPad * pad,
GstVideoAggregator * vagg G_GNUC_UNUSED,
GstVideoInfo * current_info, GstVideoInfo * wanted_info)
{
GstCompositor *comp = GST_COMPOSITOR (vagg);
GstCompositorPad *cpad = GST_COMPOSITOR_PAD (pad);
gchar *colorimetry, *best_colorimetry;
const gchar *chroma, *best_chroma;
gint width, height;
if (!current_info->finfo)
return TRUE;
if (GST_VIDEO_INFO_FORMAT (current_info) == GST_VIDEO_FORMAT_UNKNOWN)
return TRUE;
if (cpad->convert)
gst_video_converter_free (cpad->convert);
cpad->convert = NULL;
static GstFlowReturn
gst_compositor_aggregate_frames (GstVideoAggregator * vagg, GstBuffer * outbuf)
{
GList *l;
GstCompositor *self = GST_COMPOSITOR (vagg);
BlendFunction composite;
GstVideoFrame out_frame, *outframe;
if (!gst_video_frame_map (&out_frame, &vagg->info, outbuf, GST_MAP_WRITE)) {
return GST_FLOW_ERROR;
}
outframe = &out_frame;
/* default to blending */
composite = self->blend;
switch (self->background) {
case COMPOSITOR_BACKGROUND_CHECKER:
self->fill_checker (outframe);
break;
case COMPOSITOR_BACKGROUND_BLACK:
self->fill_color (outframe, 16, 128, 128);
break;
case COMPOSITOR_BACKGROUND_WHITE:
self->fill_color (outframe, 240, 128, 128);
break;
case COMPOSITOR_BACKGROUND_TRANSPARENT:
{
guint i, plane, num_planes, height;
num_planes = GST_VIDEO_FRAME_N_PLANES (outframe);
for (plane = 0; plane < num_planes; ++plane) {
guint8 *pdata;
gsize rowsize, plane_stride;
pdata = GST_VIDEO_FRAME_PLANE_DATA (outframe, plane);
plane_stride = GST_VIDEO_FRAME_PLANE_STRIDE (outframe, plane);
rowsize = GST_VIDEO_FRAME_COMP_WIDTH (outframe, plane)
* GST_VIDEO_FRAME_COMP_PSTRIDE (outframe, plane);
height = GST_VIDEO_FRAME_COMP_HEIGHT (outframe, plane);
for (i = 0; i < height; ++i) {
memset (pdata, 0, rowsize);
pdata += plane_stride;
}
}
/* use overlay to keep background transparent */
composite = self->overlay;
break;
}
}
GST_OBJECT_LOCK (vagg);
for (l = GST_ELEMENT (vagg)->sinkpads; l; l = l->next) {
GstVideoAggregatorPad *pad = l->data;
GstCompositorPad *compo_pad = GST_COMPOSITOR_PAD (pad);
if (pad->aggregated_frame != NULL) {
composite (pad->aggregated_frame, compo_pad->xpos, compo_pad->ypos,
compo_pad->alpha, outframe);
}
}
GST_OBJECT_UNLOCK (vagg);
gst_video_frame_unmap (outframe);
return GST_FLOW_OK;
}
