2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
30 #include "gstidentity.h"
32 GST_DEBUG_CATEGORY_STATIC (gst_identity_debug);
33 #define GST_CAT_DEFAULT gst_identity_debug
35 GstElementDetails gst_identity_details = GST_ELEMENT_DETAILS (
38 "Pass data without modification",
39 "Erik Walthinsen <omega@cse.ogi.edu>"
43 /* Identity signals and args */
64 static void gst_identity_base_init (gpointer g_class);
65 static void gst_identity_class_init (GstIdentityClass *klass);
66 static void gst_identity_init (GstIdentity *identity);
68 static void gst_identity_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
69 static void gst_identity_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
71 static void gst_identity_chain (GstPad *pad, GstData *_data);
73 static GstElementClass *parent_class = NULL;
74 static guint gst_identity_signals[LAST_SIGNAL] = { 0 };
77 gst_identity_get_type (void)
79 static GType identity_type = 0;
82 static const GTypeInfo identity_info = {
83 sizeof(GstIdentityClass),
84 gst_identity_base_init,
86 (GClassInitFunc)gst_identity_class_init,
91 (GInstanceInitFunc)gst_identity_init,
93 identity_type = g_type_register_static (GST_TYPE_ELEMENT, "GstIdentity", &identity_info, 0);
95 GST_DEBUG_CATEGORY_INIT (gst_identity_debug, "identity", 0, "identity element");
101 gst_identity_base_init (gpointer g_class)
103 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
105 gst_element_class_set_details (gstelement_class, &gst_identity_details);
108 gst_identity_class_init (GstIdentityClass *klass)
110 GObjectClass *gobject_class;
112 gobject_class = G_OBJECT_CLASS (klass);
114 parent_class = g_type_class_peek_parent (klass);
116 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOOP_BASED,
117 g_param_spec_boolean ("loop-based", "Loop-based",
118 "Set to TRUE to use loop-based rather than chain-based scheduling",
119 TRUE, G_PARAM_READWRITE));
120 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SLEEP_TIME,
121 g_param_spec_uint ("sleep-time", "Sleep time", "Microseconds to sleep between processing",
122 0, G_MAXUINT, 0, G_PARAM_READWRITE));
123 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DUPLICATE,
124 g_param_spec_uint ("duplicate", "Duplicate Buffers", "Push the buffers N times",
125 0, G_MAXUINT, 1, G_PARAM_READWRITE));
126 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_ERROR_AFTER,
127 g_param_spec_int ("error_after", "Error After", "Error after N buffers",
128 G_MININT, G_MAXINT, -1, G_PARAM_READWRITE));
129 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DROP_PROBABILITY,
130 g_param_spec_float ("drop_probability", "Drop Probability", "The Probability a buffer is dropped",
131 0.0, 1.0, 0.0, G_PARAM_READWRITE));
132 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_SILENT,
133 g_param_spec_boolean ("silent", "silent", "silent",
134 FALSE, G_PARAM_READWRITE));
135 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LAST_MESSAGE,
136 g_param_spec_string ("last-message", "last-message", "last-message",
137 NULL, G_PARAM_READABLE));
138 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DUMP,
139 g_param_spec_boolean("dump", "Dump", "Dump buffer contents",
140 FALSE, G_PARAM_READWRITE));
141 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DELAY_CAPSNEGO,
142 g_param_spec_boolean("delay_capsnego", "Delay Caps Nego", "Delay capsnegotiation to loop/chain function",
143 FALSE, G_PARAM_READWRITE));
145 gst_identity_signals[SIGNAL_HANDOFF] =
146 g_signal_new ("handoff", G_TYPE_FROM_CLASS(klass), G_SIGNAL_RUN_LAST,
147 G_STRUCT_OFFSET (GstIdentityClass, handoff), NULL, NULL,
148 gst_marshal_VOID__POINTER, G_TYPE_NONE, 1,
151 gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_identity_set_property);
152 gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_identity_get_property);
156 gst_identity_getcaps (GstPad *pad)
158 GstIdentity *identity;
162 identity = GST_IDENTITY (gst_pad_get_parent (pad));
164 if (identity->delay_capsnego) {
168 otherpad = (pad == identity->srcpad ? identity->sinkpad : identity->srcpad);
169 peer = GST_PAD_PEER (otherpad);
172 return gst_pad_get_caps (peer);
174 return gst_caps_new_any ();
178 static GstPadLinkReturn
179 gst_identity_link (GstPad *pad, const GstCaps *caps)
181 GstIdentity *identity;
183 identity = GST_IDENTITY (gst_pad_get_parent (pad));
185 if (gst_caps_is_fixed (caps)) {
186 if (identity->delay_capsnego && GST_PAD_IS_SINK (pad)) {
187 identity->srccaps = gst_caps_copy (caps);
189 return GST_PAD_LINK_OK;
194 otherpad = (pad == identity->srcpad ? identity->sinkpad : identity->srcpad);
196 return gst_pad_try_set_caps (otherpad, caps);
200 return GST_PAD_LINK_DELAYED;
204 gst_identity_init (GstIdentity *identity)
206 identity->sinkpad = gst_pad_new ("sink", GST_PAD_SINK);
207 gst_element_add_pad (GST_ELEMENT (identity), identity->sinkpad);
208 gst_pad_set_chain_function (identity->sinkpad, GST_DEBUG_FUNCPTR (gst_identity_chain));
209 gst_pad_set_link_function (identity->sinkpad, gst_identity_link);
210 gst_pad_set_getcaps_function (identity->sinkpad, gst_identity_getcaps);
212 identity->srcpad = gst_pad_new ("src", GST_PAD_SRC);
213 gst_element_add_pad (GST_ELEMENT (identity), identity->srcpad);
214 gst_pad_set_link_function (identity->srcpad, gst_identity_link);
215 gst_pad_set_getcaps_function (identity->srcpad, gst_identity_getcaps);
217 identity->loop_based = FALSE;
218 identity->sleep_time = 0;
219 identity->duplicate = 1;
220 identity->error_after = -1;
221 identity->drop_probability = 0.0;
222 identity->silent = FALSE;
223 identity->dump = FALSE;
224 identity->last_message = NULL;
225 identity->delay_capsnego = FALSE;
226 identity->srccaps = NULL;
230 gst_identity_chain (GstPad *pad, GstData *_data)
232 GstBuffer *buf = GST_BUFFER (_data);
233 GstIdentity *identity;
236 g_return_if_fail (pad != NULL);
237 g_return_if_fail (GST_IS_PAD (pad));
238 g_return_if_fail (buf != NULL);
240 identity = GST_IDENTITY (gst_pad_get_parent (pad));
242 if (identity->delay_capsnego && identity->srccaps) {
243 if (gst_pad_try_set_caps (identity->srcpad, identity->srccaps) <= 0) {
244 if (!gst_pad_recover_caps_error (identity->srcpad, identity->srccaps)) {
245 gst_buffer_unref (buf);
249 identity->srccaps = NULL;
252 if (identity->error_after >= 0) {
253 identity->error_after--;
254 if (identity->error_after == 0) {
255 gst_buffer_unref (buf);
256 gst_element_error (GST_ELEMENT (identity), "errored after iterations as requested");
261 if (identity->drop_probability > 0.0) {
262 if ((gfloat)(1.0*rand()/(RAND_MAX)) < identity->drop_probability) {
263 if (identity->last_message != NULL) {
264 g_free (identity->last_message);
266 identity->last_message = g_strdup_printf ("dropping ******* (%s:%s)i (%d bytes, %"
268 GST_DEBUG_PAD_NAME (identity->sinkpad), GST_BUFFER_SIZE (buf), GST_BUFFER_TIMESTAMP (buf));
269 g_object_notify (G_OBJECT (identity), "last-message");
270 gst_buffer_unref (buf);
274 if (identity->dump) {
275 gst_util_dump_mem (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
278 for (i = identity->duplicate; i; i--) {
279 if (!identity->silent) {
280 g_free (identity->last_message);
281 identity->last_message = g_strdup_printf ("chain ******* (%s:%s)i (%d bytes, %"
283 GST_DEBUG_PAD_NAME (identity->sinkpad), GST_BUFFER_SIZE (buf), GST_BUFFER_TIMESTAMP (buf));
284 g_object_notify (G_OBJECT (identity), "last-message");
287 g_signal_emit (G_OBJECT (identity), gst_identity_signals[SIGNAL_HANDOFF], 0,
291 gst_buffer_ref (buf);
293 gst_pad_push (identity->srcpad, GST_DATA (buf));
295 if (identity->sleep_time)
296 g_usleep (identity->sleep_time);
301 gst_identity_loop (GstElement *element)
303 GstIdentity *identity;
306 g_return_if_fail (element != NULL);
307 g_return_if_fail (GST_IS_IDENTITY (element));
309 identity = GST_IDENTITY (element);
311 buf = GST_BUFFER (gst_pad_pull (identity->sinkpad));
312 if (GST_IS_EVENT (buf)) {
313 GstEvent *event = GST_EVENT (buf);
315 if (GST_EVENT_IS_INTERRUPT (event)) {
316 gst_event_unref (event);
319 gst_pad_event_default (identity->sinkpad, event);
323 gst_identity_chain (identity->sinkpad, GST_DATA (buf));
328 gst_identity_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
330 GstIdentity *identity;
332 /* it's not null if we got it, but it might not be ours */
333 g_return_if_fail (GST_IS_IDENTITY (object));
335 identity = GST_IDENTITY (object);
339 identity->loop_based = g_value_get_boolean (value);
340 if (identity->loop_based) {
341 gst_element_set_loop_function (GST_ELEMENT (identity), gst_identity_loop);
342 gst_pad_set_chain_function (identity->sinkpad, NULL);
345 gst_pad_set_chain_function (identity->sinkpad, gst_identity_chain);
346 gst_element_set_loop_function (GST_ELEMENT (identity), NULL);
350 identity->sleep_time = g_value_get_uint (value);
353 identity->silent = g_value_get_boolean (value);
356 identity->duplicate = g_value_get_uint (value);
359 identity->dump = g_value_get_boolean (value);
361 case ARG_DELAY_CAPSNEGO:
362 identity->delay_capsnego = g_value_get_boolean (value);
364 case ARG_ERROR_AFTER:
365 identity->error_after = g_value_get_int (value);
367 case ARG_DROP_PROBABILITY:
368 identity->drop_probability = g_value_get_float (value);
375 static void gst_identity_get_property(GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) {
376 GstIdentity *identity;
378 /* it's not null if we got it, but it might not be ours */
379 g_return_if_fail (GST_IS_IDENTITY (object));
381 identity = GST_IDENTITY (object);
385 g_value_set_boolean (value, identity->loop_based);
388 g_value_set_uint (value, identity->sleep_time);
391 g_value_set_uint (value, identity->duplicate);
393 case ARG_ERROR_AFTER:
394 g_value_set_int (value, identity->error_after);
396 case ARG_DROP_PROBABILITY:
397 g_value_set_float (value, identity->drop_probability);
400 g_value_set_boolean (value, identity->silent);
403 g_value_set_boolean (value, identity->dump);
405 case ARG_DELAY_CAPSNEGO:
406 g_value_set_boolean (value, identity->delay_capsnego);
408 case ARG_LAST_MESSAGE:
409 g_value_set_string (value, identity->last_message);
412 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);