--- /dev/null
+/* GStreamer
+ * Copyright (C) <2009> Sebastian Dröge <sebastian.droege@collabora.co.uk>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstrsvgdec.h"
+
+#include <string.h>
+
+GST_DEBUG_CATEGORY_STATIC (rsvgdec_debug);
+#define GST_CAT_DEFAULT rsvgdec_debug
+
+static GstStaticPadTemplate sink_factory =
+ GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+ GST_STATIC_CAPS ("image/svg+xml; image/svg"));
+
+static GstStaticPadTemplate src_factory =
+GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+#if G_BYTE_ORDER == G_LITTLE_ENDIAN
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRA)
+#else
+ GST_STATIC_CAPS (GST_VIDEO_CAPS_ARGB)
+#endif
+ );
+
+GST_BOILERPLATE (GstRsvgDec, gst_rsvg_dec, GstElement, GST_TYPE_ELEMENT);
+
+static void gst_rsvg_dec_reset (GstRsvgDec * rsvg);
+
+static GstFlowReturn gst_rsvg_dec_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_rsvg_dec_sink_set_caps (GstPad * pad, GstCaps * caps);
+static gboolean gst_rsvg_dec_sink_event (GstPad * pad, GstEvent * event);
+
+static gboolean gst_rsvg_dec_src_event (GstPad * pad, GstEvent * event);
+static gboolean gst_rsvg_dec_src_query (GstPad * pad, GstQuery * query);
+static const GstQueryType *gst_rsvg_dec_src_query_type (GstPad * pad);
+static gboolean gst_rsvg_dec_src_set_caps (GstPad * pad, GstCaps * caps);
+
+static GstStateChangeReturn gst_rsvg_dec_change_state (GstElement * element,
+ GstStateChange transition);
+
+static void gst_rsvg_dec_finalize (GObject * object);
+
+static void
+gst_rsvg_dec_base_init (gpointer g_class)
+{
+ GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+ gst_element_class_set_details_simple (element_class,
+ "SVG image decoder", "Codec/Decoder/Image",
+ "Uses librsvg to decode SVG images",
+ "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
+
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&sink_factory));
+ gst_element_class_add_pad_template (element_class,
+ gst_static_pad_template_get (&src_factory));
+}
+
+static void
+gst_rsvg_dec_class_init (GstRsvgDecClass * klass)
+{
+ GstElementClass *element_class = (GstElementClass *) klass;
+ GObjectClass *gobject_class = (GObjectClass *) klass;
+
+ GST_DEBUG_CATEGORY_INIT (rsvgdec_debug, "rsvgdec", 0, "RSVG decoder");
+
+ gobject_class->finalize = gst_rsvg_dec_finalize;
+ element_class->change_state = GST_DEBUG_FUNCPTR (gst_rsvg_dec_change_state);
+}
+
+static void
+gst_rsvg_dec_init (GstRsvgDec * rsvg, GstRsvgDecClass * klass)
+{
+ rsvg->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
+ gst_pad_set_setcaps_function (rsvg->sinkpad, gst_rsvg_dec_sink_set_caps);
+ gst_pad_set_event_function (rsvg->sinkpad, gst_rsvg_dec_sink_event);
+ gst_pad_set_chain_function (rsvg->sinkpad, gst_rsvg_dec_chain);
+ gst_element_add_pad (GST_ELEMENT (rsvg), rsvg->sinkpad);
+
+ rsvg->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
+ gst_pad_set_event_function (rsvg->srcpad, gst_rsvg_dec_src_event);
+ gst_pad_set_query_function (rsvg->srcpad, gst_rsvg_dec_src_query);
+ gst_pad_set_query_type_function (rsvg->srcpad, gst_rsvg_dec_src_query_type);
+ gst_pad_set_setcaps_function (rsvg->srcpad, gst_rsvg_dec_src_set_caps);
+ gst_element_add_pad (GST_ELEMENT (rsvg), rsvg->srcpad);
+
+ rsvg->adapter = gst_adapter_new ();
+
+ gst_rsvg_dec_reset (rsvg);
+}
+
+static void
+gst_rsvg_dec_finalize (GObject * object)
+{
+ GstRsvgDec *rsvg = GST_RSVG_DEC (object);
+
+ if (rsvg->adapter) {
+ gst_object_unref (rsvg->adapter);
+ rsvg->adapter = NULL;
+ }
+
+ G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static void
+gst_rsvg_dec_reset (GstRsvgDec * dec)
+{
+ gst_adapter_clear (dec->adapter);
+ dec->width = dec->height = 0;
+ dec->fps_n = 0;
+ dec->fps_d = 1;
+ dec->timestamp_offset = GST_CLOCK_TIME_NONE;
+ dec->frame_count = 0;
+
+ gst_segment_init (&dec->segment, GST_FORMAT_UNDEFINED);
+ dec->need_newsegment = TRUE;
+
+ g_list_foreach (dec->pending_events, (GFunc) gst_mini_object_unref, NULL);
+ g_list_free (dec->pending_events);
+ dec->pending_events = NULL;
+
+ if (dec->pending_tags) {
+ gst_tag_list_free (dec->pending_tags);
+ dec->pending_tags = NULL;
+ }
+}
+
+static GstFlowReturn
+gst_rsvg_decode_image (GstRsvgDec * rsvg, const guint8 * data, guint size,
+ GstBuffer ** buffer)
+{
+ GstFlowReturn ret = GST_FLOW_OK;
+ cairo_t *cr;
+ cairo_surface_t *surface;
+ RsvgHandle *handle;
+ GError *error = NULL;
+ RsvgDimensionData dimension;
+ gdouble scalex, scaley;
+ const gchar *title = NULL, *comment = NULL;
+
+ handle = rsvg_handle_new_from_data (data, size, &error);
+ if (!handle) {
+ GST_ERROR_OBJECT (rsvg, "Failed to parse SVG image: %s", error->message);
+ g_error_free (error);
+ return GST_FLOW_ERROR;
+ }
+
+ title = rsvg_handle_get_title (handle);
+ comment = rsvg_handle_get_desc (handle);
+
+ if (title || comment) {
+ if (!rsvg->pending_tags)
+ rsvg->pending_tags = gst_tag_list_new ();
+
+ if (title && *title)
+ gst_tag_list_add (rsvg->pending_tags, GST_TAG_MERGE_REPLACE_ALL,
+ GST_TAG_TITLE, title, NULL);
+ if (comment && *comment)
+ gst_tag_list_add (rsvg->pending_tags, GST_TAG_MERGE_REPLACE_ALL,
+ GST_TAG_COMMENT, comment, NULL);
+ }
+
+ rsvg_handle_get_dimensions (handle, &dimension);
+ if (rsvg->width != dimension.width || rsvg->height != dimension.height) {
+ GstCaps *caps1, *caps2, *caps3;
+ GstStructure *s;
+
+ caps1 = gst_caps_copy (gst_pad_get_pad_template_caps (rsvg->srcpad));
+ caps2 = gst_pad_peer_get_caps (rsvg->srcpad);
+ if (caps2) {
+ caps3 = gst_caps_intersect (caps1, caps2);
+ gst_caps_unref (caps1);
+ gst_caps_unref (caps2);
+ caps1 = caps3;
+ caps3 = NULL;
+ }
+
+ if (gst_caps_is_empty (caps1)) {
+ GST_ERROR_OBJECT (rsvg, "Unable to negotiate a format");
+ gst_caps_unref (caps1);
+ g_object_unref (handle);
+ return GST_FLOW_NOT_NEGOTIATED;
+ }
+
+ caps2 = gst_caps_copy (gst_pad_get_pad_template_caps (rsvg->srcpad));
+ s = gst_caps_get_structure (caps2, 0);
+ gst_structure_set (s, "width", G_TYPE_INT, dimension.width, "height",
+ G_TYPE_INT, dimension.height, "framerate", GST_TYPE_FRACTION, 0, 1,
+ NULL);
+ caps3 = gst_caps_intersect (caps1, caps2);
+ if (!gst_caps_is_empty (caps3)) {
+ gst_caps_truncate (caps3);
+ gst_pad_set_caps (rsvg->srcpad, caps3);
+ gst_caps_unref (caps1);
+ gst_caps_unref (caps2);
+ gst_caps_unref (caps3);
+ rsvg->width = dimension.width;
+ rsvg->height = dimension.height;
+ } else {
+ gst_caps_unref (caps2);
+ gst_caps_unref (caps3);
+ gst_caps_truncate (caps1);
+
+ s = gst_caps_get_structure (caps1, 0);
+ gst_structure_set (s, "framerate", GST_TYPE_FRACTION, 0, 1, NULL);
+
+ if (!gst_caps_is_fixed (caps1)
+ && (!gst_structure_fixate_field_nearest_int (s, "width",
+ dimension.width)
+ || !gst_structure_fixate_field_nearest_int (s, "height",
+ dimension.height))) {
+ g_object_unref (handle);
+ GST_ERROR_OBJECT (rsvg, "Failed to fixate caps");
+ return GST_FLOW_NOT_NEGOTIATED;
+ }
+ gst_pad_set_caps (rsvg->srcpad, caps1);
+ gst_structure_get_int (s, "width", &rsvg->width);
+ gst_structure_get_int (s, "height", &rsvg->height);
+ gst_caps_unref (caps1);
+ }
+ }
+
+ if ((ret = gst_pad_alloc_buffer_and_set_caps (rsvg->srcpad,
+ GST_BUFFER_OFFSET_NONE,
+ rsvg->width * rsvg->height * 4,
+ GST_PAD_CAPS (rsvg->srcpad), buffer)) != GST_FLOW_OK) {
+ g_object_unref (handle);
+ GST_ERROR_OBJECT (rsvg, "Buffer allocation failed %s",
+ gst_flow_get_name (ret));
+ return ret;
+ }
+
+ surface =
+ cairo_image_surface_create_for_data (GST_BUFFER_DATA (*buffer),
+ CAIRO_FORMAT_ARGB32, rsvg->width, rsvg->height, rsvg->width * 4);
+
+ cr = cairo_create (surface);
+ cairo_set_operator (cr, CAIRO_OPERATOR_CLEAR);
+ cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.0);
+ cairo_paint (cr);
+ cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
+ cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 1.0);
+
+ scalex = scaley = 1.0;
+ if (rsvg->width != dimension.width) {
+ scalex = ((gdouble) rsvg->width) / ((gdouble) dimension.width);
+ }
+ if (rsvg->height != dimension.height) {
+ scaley = ((gdouble) rsvg->height) / ((gdouble) dimension.height);
+ }
+ cairo_scale (cr, scalex, scaley);
+ rsvg_handle_render_cairo (handle, cr);
+
+ g_object_unref (handle);
+ cairo_destroy (cr);
+ cairo_surface_destroy (surface);
+
+ return ret;
+}
+
+static GstFlowReturn
+gst_rsvg_dec_chain (GstPad * pad, GstBuffer * buffer)
+{
+ GstRsvgDec *rsvg = GST_RSVG_DEC (gst_pad_get_parent (pad));
+ gboolean completed = FALSE;
+ const guint8 *data;
+ guint size;
+ gboolean ret = GST_FLOW_OK;
+
+ if (rsvg->timestamp_offset == GST_CLOCK_TIME_NONE) {
+ if (GST_BUFFER_TIMESTAMP_IS_VALID (buffer))
+ rsvg->timestamp_offset = GST_BUFFER_TIMESTAMP (buffer);
+ else
+ rsvg->timestamp_offset = 0;
+ }
+
+ gst_adapter_push (rsvg->adapter, buffer);
+
+ size = gst_adapter_available (rsvg->adapter);
+
+ /* "<svg></svg>" */
+ while (size >= 5 + 6 && ret == GST_FLOW_OK) {
+ guint i;
+
+ data = gst_adapter_peek (rsvg->adapter, size);
+ for (i = size - 6; i >= 5; i--) {
+ if (memcmp (data + i, "</svg>", 6) == 0) {
+ completed = TRUE;
+ size = i + 6;
+ break;
+ }
+ }
+
+ if (completed) {
+ GstBuffer *outbuf = NULL;
+
+ data = gst_adapter_peek (rsvg->adapter, size);
+
+ ret = gst_rsvg_decode_image (rsvg, data, size, &outbuf);
+ if (ret != GST_FLOW_OK)
+ break;
+
+
+ if (rsvg->fps_n != 0) {
+ GST_BUFFER_TIMESTAMP (outbuf) =
+ rsvg->timestamp_offset + gst_util_uint64_scale (rsvg->frame_count,
+ rsvg->fps_d, rsvg->fps_n * GST_SECOND);
+ GST_BUFFER_DURATION (outbuf) =
+ gst_util_uint64_scale (rsvg->frame_count, rsvg->fps_d,
+ rsvg->fps_n * GST_SECOND);
+ } else {
+ GST_BUFFER_TIMESTAMP (outbuf) = 0;
+ }
+ rsvg->frame_count++;
+
+ if (rsvg->need_newsegment) {
+ gst_pad_push_event (rsvg->srcpad,
+ gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_TIME, 0, -1, 0));
+ rsvg->need_newsegment = FALSE;
+ }
+
+ if (rsvg->pending_events) {
+ GList *l;
+
+ for (l = rsvg->pending_events; l; l = l->next)
+ gst_pad_push_event (rsvg->srcpad, l->data);
+ g_list_free (rsvg->pending_events);
+ rsvg->pending_events = NULL;
+ }
+
+ if (rsvg->pending_tags) {
+ gst_element_found_tags (GST_ELEMENT_CAST (rsvg), rsvg->pending_tags);
+ rsvg->pending_tags = NULL;
+ }
+
+ ret = gst_pad_push (rsvg->srcpad, outbuf);
+ if (ret != GST_FLOW_OK)
+ break;
+
+ gst_adapter_flush (rsvg->adapter, size);
+ size = gst_adapter_available (rsvg->adapter);
+ continue;
+ } else {
+ break;
+ }
+ }
+
+ gst_object_unref (rsvg);
+
+ return GST_FLOW_OK;
+}
+
+static gboolean
+gst_rsvg_dec_sink_set_caps (GstPad * pad, GstCaps * caps)
+{
+ GstRsvgDec *rsvg = GST_RSVG_DEC (gst_pad_get_parent (pad));
+ gboolean ret = TRUE;
+ GstStructure *s = gst_caps_get_structure (caps, 0);
+
+ gst_structure_get_fraction (s, "framerate", &rsvg->fps_n, &rsvg->fps_d);
+
+ gst_object_unref (rsvg);
+
+ return ret;
+}
+
+static gboolean
+gst_rsvg_dec_sink_event (GstPad * pad, GstEvent * event)
+{
+ GstRsvgDec *rsvg = GST_RSVG_DEC (gst_pad_get_parent (pad));
+ gboolean res = FALSE;
+
+ switch (GST_EVENT_TYPE (event)) {
+ case GST_EVENT_NEWSEGMENT:{
+ gdouble rate, arate;
+ gboolean update;
+ gint64 start, stop, position;
+ GstFormat fmt;
+
+ gst_event_parse_new_segment_full (event, &update, &rate, &arate, &fmt,
+ &start, &stop, &position);
+
+ gst_segment_set_newsegment_full (&rsvg->segment, update, rate, arate,
+ fmt, start, stop, position);
+
+ if (fmt == GST_FORMAT_TIME) {
+ rsvg->need_newsegment = FALSE;
+ res = gst_pad_push_event (rsvg->srcpad, event);
+ } else {
+ gst_event_unref (event);
+ res = TRUE;
+ }
+ break;
+ }
+ case GST_EVENT_EOS:
+ case GST_EVENT_FLUSH_STOP:
+ gst_adapter_clear (rsvg->adapter);
+ /* fall through */
+ case GST_EVENT_FLUSH_START:
+ res = gst_pad_push_event (rsvg->srcpad, event);
+ break;
+ default:
+ if (GST_PAD_CAPS (rsvg->srcpad)) {
+ res = gst_pad_push_event (rsvg->srcpad, event);
+ } else {
+ res = TRUE;
+ rsvg->pending_events = g_list_append (rsvg->pending_events, event);
+ }
+ break;
+ }
+
+ gst_object_unref (rsvg);
+
+ return res;
+}
+
+static gboolean
+gst_rsvg_dec_src_event (GstPad * pad, GstEvent * event)
+{
+ GstRsvgDec *rsvg = GST_RSVG_DEC (gst_pad_get_parent (pad));
+ gboolean res = FALSE;
+
+ switch (GST_EVENT_TYPE (event)) {
+ default:
+ res = gst_pad_push_event (rsvg->sinkpad, event);
+ break;
+ }
+
+ gst_object_unref (rsvg);
+
+ return res;
+}
+
+static const GstQueryType *
+gst_rsvg_dec_src_query_type (GstPad * pad)
+{
+ static const GstQueryType query_types[] = {
+ (GstQueryType) 0
+ };
+
+ return query_types;
+}
+
+static gboolean
+gst_rsvg_dec_src_query (GstPad * pad, GstQuery * query)
+{
+ GstRsvgDec *rsvg = GST_RSVG_DEC (gst_pad_get_parent (pad));
+ gboolean res = TRUE;
+
+ switch (GST_QUERY_TYPE (query)) {
+ default:
+ res = gst_pad_query_default (pad, query);
+ break;
+ }
+
+ gst_object_unref (rsvg);
+
+ return res;
+}
+
+static gboolean
+gst_rsvg_dec_src_set_caps (GstPad * pad, GstCaps * caps)
+{
+ GstRsvgDec *rsvg = GST_RSVG_DEC (gst_pad_get_parent (pad));
+ gboolean ret = TRUE;
+ GstStructure *s = gst_caps_get_structure (caps, 0);
+
+ ret &= gst_structure_get_int (s, "width", &rsvg->width);
+ ret &= gst_structure_get_int (s, "height", &rsvg->height);
+
+ gst_object_unref (rsvg);
+
+ return ret;
+}
+
+static GstStateChangeReturn
+gst_rsvg_dec_change_state (GstElement * element, GstStateChange transition)
+{
+ GstStateChangeReturn res;
+ GstRsvgDec *dec = GST_RSVG_DEC (element);
+
+ switch (transition) {
+ case GST_STATE_CHANGE_READY_TO_PAUSED:
+ break;
+ default:
+ break;
+ }
+
+ res = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+ if (res == GST_STATE_CHANGE_FAILURE)
+ return res;
+
+ switch (transition) {
+ case GST_STATE_CHANGE_PAUSED_TO_READY:
+ gst_rsvg_dec_reset (dec);
+ break;
+ default:
+ break;
+ }
+
+ return res;
+}