static GstFlowReturn
gst_rsvg_overlay_data_sink_chain (GstPad * pad, GstBuffer * buffer)
{
GstRsvgOverlay *overlay = GST_RSVG_OVERLAY (GST_PAD_PARENT (pad));
gst_adapter_push (overlay->adapter, buffer);
return GST_FLOW_OK;
}
static void
gst_rsvg_overlay_finalize (GObject * object)
{
GstRsvgOverlay *overlay = GST_RSVG_OVERLAY (object);
g_object_unref (overlay->adapter);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static gboolean
gst_rsvg_overlay_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
GstCaps * outcaps)
{
GstRsvgOverlay *overlay = GST_RSVG_OVERLAY (btrans);
return G_LIKELY (gst_video_format_parse_caps (incaps,
&overlay->caps_format, &overlay->caps_width, &overlay->caps_height));
}
static gboolean
gst_rsvg_overlay_stop (GstBaseTransform * btrans)
{
GstRsvgOverlay *overlay = GST_RSVG_OVERLAY (btrans);
if (overlay->handle) {
g_object_unref (overlay->handle);
g_object_unref (overlay->adapter);
overlay->handle = NULL;
}
return TRUE;
}
static void
gst_rsvg_overlay_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstRsvgOverlay *overlay = GST_RSVG_OVERLAY (object);
switch (prop_id) {
case PROP_X:
g_value_set_int (value, overlay->x_offset);
break;
case PROP_Y:
g_value_set_int (value, overlay->y_offset);
break;
case PROP_X_RELATIVE:
g_value_set_float (value, overlay->x_relative);
break;
case PROP_Y_RELATIVE:
g_value_set_float (value, overlay->y_relative);
break;
case PROP_WIDTH:
g_value_set_int (value, overlay->width);
break;
case PROP_HEIGHT:
g_value_set_int (value, overlay->height);
break;
case PROP_WIDTH_RELATIVE:
g_value_set_float (value, overlay->width_relative);
break;
case PROP_HEIGHT_RELATIVE:
g_value_set_float (value, overlay->height_relative);
break;
case PROP_FIT_TO_FRAME:
g_value_set_boolean (value, (overlay->width_relative == 1.0
&& overlay->height_relative == 1.0));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_rsvg_overlay_data_sink_event (GstPad * pad, GstObject * parent,
GstEvent * event)
{
GstRsvgOverlay *overlay = GST_RSVG_OVERLAY (GST_PAD_PARENT (pad));
GST_LOG_OBJECT (pad, "Got %s event", GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_EOS:{
guint data_size;
GST_RSVG_LOCK (overlay);
/* FIXME: rsvgdec looks for </svg> in data to determine the end
of SVG code. Should we really do the same here? IOW, could
data be sent and _pushed() before the EOS gets processed? */
data_size = gst_adapter_available (overlay->adapter);
if (data_size) {
gst_rsvg_overlay_set_svg_data (overlay,
(const gchar *) gst_adapter_take (overlay->adapter, data_size),
FALSE);
gst_adapter_clear (overlay->adapter);
}
GST_RSVG_UNLOCK (overlay);
}
break;
case GST_EVENT_FLUSH_STOP:
gst_adapter_clear (overlay->adapter);
break;
default:
break;
}
/* Dropping all events here */
gst_event_unref (event);
return TRUE;
}
static GstFlowReturn
gst_rsvg_overlay_transform_ip (GstBaseTransform * btrans, GstBuffer * buf)
{
GstRsvgOverlay *overlay = GST_RSVG_OVERLAY (btrans);
cairo_surface_t *surface;
cairo_t *cr;
double applied_x_offset = (double) overlay->x_offset;
double applied_y_offset = (double) overlay->y_offset;
int applied_width = overlay->width;
int applied_height = overlay->height;
GST_RSVG_LOCK (overlay);
if (!overlay->handle) {
GST_RSVG_UNLOCK (overlay);
return GST_FLOW_OK;
}
surface =
cairo_image_surface_create_for_data (GST_BUFFER_DATA (buf),
CAIRO_FORMAT_ARGB32, overlay->caps_width, overlay->caps_height,
overlay->caps_width * 4);
if (G_UNLIKELY (!surface))
return GST_FLOW_ERROR;
cr = cairo_create (surface);
if (G_UNLIKELY (!cr)) {
cairo_surface_destroy (surface);
return GST_FLOW_ERROR;
}
/* Compute relative dimensions if absolute dimensions are not set */
if (!applied_x_offset && overlay->x_relative) {
applied_x_offset = overlay->x_relative * overlay->caps_width;
}
if (!applied_y_offset && overlay->y_relative) {
applied_y_offset = overlay->y_relative * overlay->caps_height;
}
if (!applied_width && overlay->width_relative) {
applied_width = (int) (overlay->width_relative * overlay->caps_width);
}
if (!applied_height && overlay->height_relative) {
applied_height = (int) (overlay->height_relative * overlay->caps_height);
}
if (applied_x_offset || applied_y_offset) {
cairo_translate (cr, applied_x_offset, applied_y_offset);
}
/* Scale when necessary, i.e. an absolute or relative dimension has been specified. */
if ((applied_width || applied_height) && overlay->svg_width
&& overlay->svg_height) {
/* If may happen that only one of the dimension is specified. Use
the original SVG size for the other dimension. */
if (!applied_width)
applied_width = overlay->svg_width;
if (!applied_height)
applied_height = overlay->svg_height;
cairo_scale (cr, (double) applied_width / overlay->svg_width,
(double) applied_height / overlay->svg_height);
}
rsvg_handle_render_cairo (overlay->handle, cr);
GST_RSVG_UNLOCK (overlay);
cairo_destroy (cr);
cairo_surface_destroy (surface);
return GST_FLOW_OK;
}
static void
gst_rsvg_overlay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRsvgOverlay *overlay = GST_RSVG_OVERLAY (object);
GST_RSVG_LOCK (overlay);
switch (prop_id) {
case PROP_DATA:
{
gst_rsvg_overlay_set_svg_data (overlay, g_value_get_string (value),
FALSE);
break;
}
case PROP_FILENAME:
{
gst_rsvg_overlay_set_svg_data (overlay, g_value_get_string (value), TRUE);
break;
}
case PROP_FIT_TO_FRAME:
{
if (g_value_get_boolean (value)) {
overlay->x_offset = 0;
overlay->y_offset = 0;
overlay->x_relative = 0.0;
overlay->y_relative = 0.0;
overlay->width = 0;
overlay->height = 0;
overlay->width_relative = 1.0;
overlay->height_relative = 1.0;
} else {
overlay->width_relative = 0;
overlay->height_relative = 0;
}
break;
}
case PROP_X:
{
overlay->x_offset = g_value_get_int (value);
break;
}
case PROP_Y:
{
overlay->y_offset = g_value_get_int (value);
break;
}
case PROP_X_RELATIVE:
{
overlay->x_relative = g_value_get_float (value);
break;
}
case PROP_Y_RELATIVE:
{
overlay->y_relative = g_value_get_float (value);
break;
}
case PROP_WIDTH:
{
overlay->width = g_value_get_int (value);
break;
}
case PROP_HEIGHT:
{
overlay->height = g_value_get_int (value);
break;
}
case PROP_WIDTH_RELATIVE:
{
overlay->width_relative = g_value_get_float (value);
break;
}
case PROP_HEIGHT_RELATIVE:
{
overlay->height_relative = g_value_get_float (value);
break;
}
default:
{
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
GST_RSVG_UNLOCK (overlay);
}
static GstFlowReturn
gst_rsvg_overlay_transform_frame_ip (GstVideoFilter * vfilter,
GstVideoFrame * frame)
{
GstRsvgOverlay *overlay = GST_RSVG_OVERLAY (vfilter);
cairo_surface_t *surface;
cairo_t *cr;
double applied_x_offset = (double) overlay->x_offset;
double applied_y_offset = (double) overlay->y_offset;
int applied_width = overlay->width;
int applied_height = overlay->height;
GST_RSVG_LOCK (overlay);
if (!overlay->handle) {
GST_RSVG_UNLOCK (overlay);
return GST_FLOW_OK;
}
surface =
cairo_image_surface_create_for_data (GST_VIDEO_FRAME_PLANE_DATA (frame,
0), CAIRO_FORMAT_ARGB32, GST_VIDEO_FRAME_WIDTH (frame),
GST_VIDEO_FRAME_HEIGHT (frame), GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0));
if (G_UNLIKELY (!surface))
return GST_FLOW_ERROR;
cr = cairo_create (surface);
if (G_UNLIKELY (!cr)) {
cairo_surface_destroy (surface);
return GST_FLOW_ERROR;
}
/* Compute relative dimensions if absolute dimensions are not set */
if (!applied_x_offset && overlay->x_relative) {
applied_x_offset = overlay->x_relative * GST_VIDEO_FRAME_WIDTH (frame);
}
if (!applied_y_offset && overlay->y_relative) {
applied_y_offset = overlay->y_relative * GST_VIDEO_FRAME_HEIGHT (frame);
}
if (!applied_width && overlay->width_relative) {
applied_width =
(int) (overlay->width_relative * GST_VIDEO_FRAME_WIDTH (frame));
}
if (!applied_height && overlay->height_relative) {
applied_height =
(int) (overlay->height_relative * GST_VIDEO_FRAME_HEIGHT (frame));
}
if (applied_x_offset || applied_y_offset) {
cairo_translate (cr, applied_x_offset, applied_y_offset);
}
/* Scale when necessary, i.e. an absolute or relative dimension has been specified. */
if ((applied_width || applied_height) && overlay->svg_width
&& overlay->svg_height) {
/* If may happen that only one of the dimension is specified. Use
the original SVG size for the other dimension. */
if (!applied_width)
applied_width = overlay->svg_width;
if (!applied_height)
applied_height = overlay->svg_height;
cairo_scale (cr, (double) applied_width / overlay->svg_width,
(double) applied_height / overlay->svg_height);
}
rsvg_handle_render_cairo (overlay->handle, cr);
GST_RSVG_UNLOCK (overlay);
cairo_destroy (cr);
cairo_surface_destroy (surface);
return GST_FLOW_OK;
}