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 /* 2001/04/03 - Updated parseau to use caps nego
21 * Zaheer Merali <zaheer@grid9.net
27 #include <gstauparse.h>
30 /* elementfactory information */
31 static GstElementDetails gst_auparse_details = {
34 "Parse an .au file into raw audio",
36 "Erik Walthinsen <omega@cse.ogi.edu>",
41 au_type_find (GstBuffer *buf, gpointer private)
44 gulong *head = (gulong *) GST_BUFFER_DATA (buf);
46 if (*head == 0x2e736e64 || *head == 0x646e732e)
47 new = gst_caps_new ("au_type_find", "audio/au", NULL);
52 /* typefactory for 'au' */
53 static GstTypeDefinition audefinition = {
60 GST_PAD_TEMPLATE_FACTORY (sink_factory_templ,
72 GST_PAD_TEMPLATE_FACTORY (src_factory_templ,
79 "format", GST_PROPS_STRING ("int"),
80 "law", GST_PROPS_INT_RANGE (0, 1),
81 "endianness", GST_PROPS_INT (G_BYTE_ORDER),
82 "signed", GST_PROPS_LIST(
83 GST_PROPS_BOOLEAN (FALSE),
84 GST_PROPS_BOOLEAN (TRUE)
86 "width", GST_PROPS_LIST(
90 "depth", GST_PROPS_LIST(
94 "rate", GST_PROPS_INT_RANGE (8000,48000),
95 "channels", GST_PROPS_INT_RANGE (1, 2)
99 /* AuParse signals and args */
110 static void gst_auparse_class_init (GstAuParseClass *klass);
111 static void gst_auparse_init (GstAuParse *auparse);
113 static void gst_auparse_chain (GstPad *pad,GstBuffer *buf);
115 static GstElementClass *parent_class = NULL;
116 /*static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; */
119 gst_auparse_get_type (void)
121 static GType auparse_type = 0;
124 static const GTypeInfo auparse_info = {
125 sizeof(GstAuParseClass), NULL,
127 (GClassInitFunc) gst_auparse_class_init,
132 (GInstanceInitFunc) gst_auparse_init,
134 auparse_type = g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info, 0);
140 gst_auparse_class_init (GstAuParseClass *klass)
142 GstElementClass *gstelement_class;
144 gstelement_class = (GstElementClass*) klass;
146 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
150 gst_auparse_init (GstAuParse *auparse)
152 auparse->sinkpad = gst_pad_new_from_template (
153 GST_PAD_TEMPLATE_GET (sink_factory_templ), "sink");
154 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
155 gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);
157 auparse->srcpad = gst_pad_new_from_template (
158 GST_PAD_TEMPLATE_GET (src_factory_templ), "src");
159 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
163 auparse->encoding = 0;
164 auparse->frequency = 0;
165 auparse->channels = 0;
169 gst_auparse_chain (GstPad *pad, GstBuffer *buf)
178 g_return_if_fail (pad != NULL);
179 g_return_if_fail (GST_IS_PAD (pad));
180 g_return_if_fail (buf != NULL);
182 auparse = GST_AUPARSE (gst_pad_get_parent (pad));
184 GST_DEBUG (0, "gst_auparse_chain: got buffer in '%s'",
185 gst_element_get_name (GST_ELEMENT (auparse)));
187 data = GST_BUFFER_DATA (buf);
188 size = GST_BUFFER_SIZE (buf);
190 /* if we haven't seen any data yet... */
191 if (auparse->size == 0) {
193 gulong *head = (gulong *)data;
195 /* normal format is big endian (au is a Sparc format) */
196 if (GULONG_FROM_BE (*head) == 0x2e736e64) {
199 auparse->offset = GULONG_FROM_BE (*head);
201 auparse->size = GULONG_FROM_BE (*head);
203 auparse->encoding = GULONG_FROM_BE (*head);
205 auparse->frequency = GULONG_FROM_BE (*head);
207 auparse->channels = GULONG_FROM_BE (*head);
210 /* but I wouldn't be surprised by a little endian version */
211 } else if (GULONG_FROM_LE (head) == 0x2e736e64) {
215 auparse->offset = GULONG_FROM_LE (*head);
217 auparse->size = GULONG_FROM_LE (*head);
219 auparse->encoding = GULONG_FROM_LE (*head);
221 auparse->frequency = GULONG_FROM_LE (*head);
223 auparse->channels = GULONG_FROM_LE (*head);
227 g_warning ("help, dunno what I'm looking at!\n");
228 gst_buffer_unref(buf);
232 g_print ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld\n",
233 auparse->offset,auparse->size,auparse->encoding,
234 auparse->frequency,auparse->channels);
235 GST_DEBUG (0, "offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
236 auparse->offset,auparse->size,auparse->encoding,
237 auparse->frequency,auparse->channels);
239 switch (auparse->encoding) {
256 g_warning ("help!, dont know how to deal with this format yet\n");
260 tempcaps = GST_CAPS_NEW ("auparse_src",
262 "format", GST_PROPS_STRING ("int"),
263 "endianness", GST_PROPS_INT (G_BYTE_ORDER),
264 "rate", GST_PROPS_INT (auparse->frequency),
265 "channels", GST_PROPS_INT (auparse->channels),
266 "law", GST_PROPS_INT (law),
267 "depth", GST_PROPS_INT (depth),
268 "width", GST_PROPS_INT (depth),
269 "signed", GST_PROPS_BOOLEAN (sign));
271 if (!gst_pad_try_set_caps (auparse->srcpad, tempcaps)) {
272 gst_buffer_unref (buf);
273 gst_element_error (GST_ELEMENT (auparse), "could not set audio caps");
277 newbuf = gst_buffer_new ();
278 GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size-(auparse->offset));
279 memcpy (GST_BUFFER_DATA (newbuf), data+24, size-(auparse->offset));
280 GST_BUFFER_SIZE (newbuf) = size-(auparse->offset);
282 gst_buffer_unref (buf);
284 gst_pad_push (auparse->srcpad, newbuf);
288 gst_pad_push (auparse->srcpad, buf);
293 plugin_init (GModule *module, GstPlugin *plugin)
295 GstElementFactory *factory;
296 GstTypeFactory *type;
298 /* create the plugin structure */
299 /* create an elementfactory for the auparse element and list it */
300 factory = gst_element_factory_new ("auparse", GST_TYPE_AUPARSE,
301 &gst_auparse_details);
302 g_return_val_if_fail (factory != NULL, FALSE);
304 gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_factory_templ));
305 gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_factory_templ));
307 type = gst_type_factory_new (&audefinition);
309 gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
310 gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (type));
315 GstPluginDesc plugin_desc = {