2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
20 #include <gst/gstpipeline.h>
21 #include <gst/gstsink.h>
22 #include <gst/gstutils.h>
23 #include <gst/gsttype.h>
27 GstElementDetails gst_pipeline_details = {
30 "Complete pipeline object",
32 "Erik Walthinsen <omega@cse.ogi.edu>",
37 /* Pipeline signals and args */
49 static void gst_pipeline_class_init(GstPipelineClass *klass);
50 static void gst_pipeline_init(GstPipeline *pipeline);
52 static GstElementStateReturn gst_pipeline_change_state(GstElement *element);
54 static void gst_pipeline_prepare(GstPipeline *pipeline);
56 static void gst_pipeline_have_type(GstSink *sink, GstSink *sink2, gpointer data);
57 static void gst_pipeline_pads_autoplug(GstElement *src, GstElement *sink);
59 static GstBin *parent_class = NULL;
60 //static guint gst_pipeline_signals[LAST_SIGNAL] = { 0 };
63 gst_pipeline_get_type(void) {
64 static GtkType pipeline_type = 0;
67 static const GtkTypeInfo pipeline_info = {
70 sizeof(GstPipelineClass),
71 (GtkClassInitFunc)gst_pipeline_class_init,
72 (GtkObjectInitFunc)gst_pipeline_init,
75 (GtkClassInitFunc)NULL,
77 pipeline_type = gtk_type_unique(gst_bin_get_type(),&pipeline_info);
83 gst_pipeline_class_init(GstPipelineClass *klass) {
84 GstElementClass *gstelement_class;
86 gstelement_class = (GstElementClass*)klass;
88 parent_class = gtk_type_class(gst_bin_get_type());
90 gstelement_class->change_state = gst_pipeline_change_state;
91 gstelement_class->elementfactory = gst_elementfactory_find("pipeline");
94 static void gst_pipeline_init(GstPipeline *pipeline) {
96 pipeline->sinks = NULL;
102 * @name: name of new pipeline
104 * Create a new pipeline with the given name.
106 * Returns: newly created GstPipeline
108 GstElement *gst_pipeline_new(guchar *name) {
109 GstPipeline *pipeline;
111 pipeline = gtk_type_new(gst_pipeline_get_type());
112 gst_element_set_name(GST_ELEMENT(pipeline),name);
113 return GST_ELEMENT(pipeline);
116 static void gst_pipeline_prepare(GstPipeline *pipeline) {
117 g_print("GstPipeline: preparing pipeline \"%s\" for playing\n",
118 gst_element_get_name(GST_ELEMENT(pipeline)));
121 static void gst_pipeline_have_type(GstSink *sink, GstSink *sink2, gpointer data) {
122 g_print("GstPipeline: pipeline have type %p\n", (gboolean *)data);
124 *(gboolean *)data = TRUE;
127 static guint16 gst_pipeline_typefind(GstPipeline *pipeline, GstElement *element) {
128 gboolean found = FALSE;
129 GstElement *typefind;
132 g_print("GstPipeline: typefind for element \"%s\" %p\n",
133 gst_element_get_name(element), &found);
135 typefind = gst_elementfactory_make("typefind","typefind");
136 g_return_val_if_fail(typefind != NULL, FALSE);
138 gtk_signal_connect(GTK_OBJECT(typefind),"have_type",
139 GTK_SIGNAL_FUNC(gst_pipeline_have_type), &found);
141 gst_pad_connect(gst_element_get_pad(element,"src"),
142 gst_element_get_pad(typefind,"sink"));
144 gst_bin_add(GST_BIN(pipeline), typefind);
146 gst_bin_create_plan(GST_BIN(pipeline));
147 gst_element_set_state(GST_ELEMENT(element),GST_STATE_READY);
148 gst_element_set_state(GST_ELEMENT(element),GST_STATE_PLAYING);
150 // keep pushing buffers... the have_type signal handler will set the found flag
152 gst_src_push(GST_SRC(element));
155 gst_element_set_state(GST_ELEMENT(element),GST_STATE_NULL);
158 type_id = gst_util_get_int_arg(GTK_OBJECT(typefind),"type");
159 gst_pad_set_type_id(gst_element_get_pad(element, "src"), type_id);
162 gst_pad_disconnect(gst_element_get_pad(element,"src"),
163 gst_element_get_pad(typefind,"sink"));
164 gst_bin_remove(GST_BIN(pipeline), typefind);
165 gst_object_unref(GST_OBJECT(typefind));
170 static void gst_pipeline_pads_autoplug_func(GstElement *src, GstPad *pad, GstElement *sink) {
173 gboolean connected = FALSE;
175 g_print("gstpipeline: autoplug pad connect function type %d\n", pad->type);
177 sinkpads = gst_element_get_pad_list(sink);
179 sinkpad = (GstPad *)sinkpads->data;
181 // if we have a match, connect the pads
182 if (sinkpad->type == pad->type &&
183 sinkpad->direction == GST_PAD_SINK &&
184 !GST_PAD_CONNECTED(sinkpad))
186 gst_pad_connect(pad, sinkpad);
187 g_print("gstpipeline: autoconnect pad \"%s\" (%d) in element %s <-> ", pad->name,
188 pad->type, gst_element_get_name(src));
189 g_print("pad \"%s\" (%d) in element %s\n", sinkpad->name, sinkpad->type,
190 gst_element_get_name(sink));
194 sinkpads = g_list_next(sinkpads);
198 g_print("gstpipeline: no path to sinks for type %d\n", pad->type);
202 static void gst_pipeline_pads_autoplug(GstElement *src, GstElement *sink) {
203 GList *srcpads, *sinkpads;
204 gboolean connected = FALSE;
206 srcpads = gst_element_get_pad_list(src);
209 GstPad *srcpad = (GstPad *)srcpads->data;
212 if (srcpad->direction == GST_PAD_SRC && !GST_PAD_CONNECTED(srcpad)) {
214 sinkpads = gst_element_get_pad_list(sink);
215 // FIXME could O(n) if the types were sorted...
217 sinkpad = (GstPad *)sinkpads->data;
219 // if we have a match, connect the pads
220 if (sinkpad->type == srcpad->type &&
221 sinkpad->direction == GST_PAD_SINK &&
222 !GST_PAD_CONNECTED(sinkpad)) {
223 gst_pad_connect(srcpad, sinkpad);
224 g_print("gstpipeline: autoconnect pad \"%s\" (%d) in element %s <-> ",
225 srcpad->name, srcpad->type, gst_element_get_name(src));
226 g_print("pad \"%s\" (%d) in element %s\n", sinkpad->name,
227 sinkpad->type, gst_element_get_name(sink));
231 sinkpads = g_list_next(sinkpads);
234 srcpads = g_list_next(srcpads);
239 g_print("gstpipeline: delaying pad connections\n");
240 gtk_signal_connect(GTK_OBJECT(src),"new_pad",
241 GTK_SIGNAL_FUNC(gst_pipeline_pads_autoplug_func), sink);
246 * gst_pipeline_add_src:
247 * @pipeline: the pipeline to add the src to
248 * @src: the src to add to the pipeline
250 * Adds a src element to the pipeline. This element
251 * will be used as a src for autoplugging. If you add more
252 * than one src element, the previously added element will
255 void gst_pipeline_add_src(GstPipeline *pipeline, GstElement *src)
257 g_return_if_fail(pipeline != NULL);
258 g_return_if_fail(GST_IS_PIPELINE(pipeline));
259 g_return_if_fail(src != NULL);
260 g_return_if_fail(GST_IS_ELEMENT(src));
263 printf("gstpipeline: *WARNING* removing previously added element \"%s\"\n",
264 gst_element_get_name(pipeline->src));
265 gst_bin_remove(GST_BIN(pipeline), pipeline->src);
268 gst_bin_add(GST_BIN(pipeline), src);
272 * gst_pipeline_add_sink:
273 * @pipeline: the pipeline to add the sink to
274 * @sink: the sink to add to the pipeline
276 * Adds a sink element to the pipeline. This element
277 * will be used as a sink for autoplugging
279 void gst_pipeline_add_sink(GstPipeline *pipeline, GstElement *sink)
281 g_return_if_fail(pipeline != NULL);
282 g_return_if_fail(GST_IS_PIPELINE(pipeline));
283 g_return_if_fail(sink != NULL);
284 g_return_if_fail(GST_IS_ELEMENT(sink));
286 pipeline->sinks = g_list_prepend(pipeline->sinks, sink);
287 gst_bin_add(GST_BIN(pipeline), sink);
291 * gst_pipeline_autoplug:
292 * @pipeline: the pipeline to autoplug
294 * Constructs a complete pipeline by automatically
295 * detecting the plugins needed.
297 * Returns: a gboolean indicating success or failure.
299 gboolean gst_pipeline_autoplug(GstPipeline *pipeline) {
301 GstElement *element, *srcelement = NULL, *sinkelement= NULL;
303 GstElementFactory *factory;
305 guint16 src_type = 0, sink_type = 0;
306 gboolean complete = FALSE;
308 g_return_val_if_fail(pipeline != NULL, FALSE);
309 g_return_val_if_fail(GST_IS_PIPELINE(pipeline), FALSE);
311 g_print("GstPipeline: autopluging pipeline \"%s\"\n",
312 gst_element_get_name(GST_ELEMENT(pipeline)));
315 // fase 1, run typedetect on the source if needed...
316 if (!pipeline->src) {
317 g_print("GstPipeline: no source detected, can't autoplug pipeline \"%s\"\n",
318 gst_element_get_name(GST_ELEMENT(pipeline)));
322 factory = gst_element_get_factory(pipeline->src);
324 src_types = factory->src_types;
325 if (src_types == NULL) {
326 g_print("GstPipeline: source \"%s\" has no MIME type, running typefind...\n",
327 gst_element_get_name(pipeline->src));
329 src_type = gst_pipeline_typefind(pipeline, pipeline->src);
332 g_print("GstPipeline: source \"%s\" type found %d\n", gst_element_get_name(pipeline->src),
336 g_print("GstPipeline: source \"%s\" has no type\n", gst_element_get_name(pipeline->src));
342 // FIXME loop over types and find paths...
343 src_types = g_list_next(src_types);
347 srcelement = pipeline->src;
349 elements = pipeline->sinks;
351 // fase 2, loop over all the sinks..
356 element = GST_ELEMENT(elements->data);
358 pads = gst_element_get_pad_list(element);
361 pad = (GstPad *)pads->data;
363 if (pad->direction == GST_PAD_SINK) {
364 sink_type = gst_pad_get_type_id(pad);
365 sinkelement = element;
369 pads = g_list_next(pads);
371 elements = g_list_next(elements);
374 factories = gst_type_get_sink_to_src(src_type, sink_type);
377 // fase 3: find elements to form a pad
379 factory = (GstElementFactory *)(factories->data);
381 g_print("GstPipeline: factory \"%s\"\n", factory->name);
383 element = gst_elementfactory_create(factory, factory->name);
384 gst_bin_add(GST_BIN(pipeline), element);
386 gst_pipeline_pads_autoplug(srcelement, element);
388 srcelement = element;
390 factories = g_list_next(factories);
396 gst_pipeline_pads_autoplug(srcelement, sinkelement);
400 g_print("GstPipeline: unable to autoplug pipeline \"%s\"\n",
401 gst_element_get_name(GST_ELEMENT(pipeline)));
405 static GstElementStateReturn gst_pipeline_change_state(GstElement *element) {
406 GstPipeline *pipeline;
408 g_return_val_if_fail(GST_IS_PIPELINE(element), FALSE);
409 pipeline = GST_PIPELINE(element);
412 switch (GST_STATE_PENDING(pipeline)) {
413 case GST_STATE_READY:
414 // we need to set up internal state
415 gst_pipeline_prepare(pipeline);
421 if (GST_ELEMENT_CLASS(parent_class)->change_state)
422 return GST_ELEMENT_CLASS(parent_class)->change_state(element);
423 return GST_STATE_SUCCESS;
428 * gst_pipeline_iterate:
429 * @pipeline: GstPipeline to iterate
431 * Cause the pipeline's contents to be run through one full 'iteration'.
433 void gst_pipeline_iterate(GstPipeline *pipeline) {
434 g_return_if_fail(pipeline != NULL);
435 g_return_if_fail(GST_IS_PIPELINE(pipeline));