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 = {
35 "Parse an .au file into raw audio",
37 "Erik Walthinsen <omega@cse.ogi.edu>",
42 au_type_find (GstBuffer *buf, gpointer private)
45 gulong *head = (gulong *) GST_BUFFER_DATA (buf);
47 if (*head == 0x2e736e64 || *head == 0x646e732e)
48 new = gst_caps_new ("au_type_find", "audio/au", NULL);
53 /* typefactory for 'au' */
54 static GstTypeDefinition audefinition = {
61 GST_PAD_TEMPLATE_FACTORY (sink_factory_templ,
73 GST_PAD_TEMPLATE_FACTORY (src_factory_templ,
80 "format", GST_PROPS_STRING ("int"),
81 "law", GST_PROPS_INT_RANGE (0, 1),
82 "endianness", GST_PROPS_INT (G_BYTE_ORDER),
83 "signed", GST_PROPS_LIST(
84 GST_PROPS_BOOLEAN (FALSE),
85 GST_PROPS_BOOLEAN (TRUE)
87 "width", GST_PROPS_LIST(
91 "depth", GST_PROPS_LIST(
95 "rate", GST_PROPS_INT_RANGE (8000,48000),
96 "channels", GST_PROPS_INT_RANGE (1, 2)
100 /* AuParse signals and args */
111 static void gst_auparse_class_init (GstAuParseClass *klass);
112 static void gst_auparse_init (GstAuParse *auparse);
114 static void gst_auparse_chain (GstPad *pad,GstBuffer *buf);
116 static GstElementClass *parent_class = NULL;
117 /*static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; */
120 gst_auparse_get_type (void)
122 static GType auparse_type = 0;
125 static const GTypeInfo auparse_info = {
126 sizeof(GstAuParseClass), NULL,
128 (GClassInitFunc) gst_auparse_class_init,
133 (GInstanceInitFunc) gst_auparse_init,
135 auparse_type = g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info, 0);
141 gst_auparse_class_init (GstAuParseClass *klass)
143 GstElementClass *gstelement_class;
145 gstelement_class = (GstElementClass*) klass;
147 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
151 gst_auparse_init (GstAuParse *auparse)
153 auparse->sinkpad = gst_pad_new_from_template (
154 GST_PAD_TEMPLATE_GET (sink_factory_templ), "sink");
155 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
156 gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);
158 auparse->srcpad = gst_pad_new_from_template (
159 GST_PAD_TEMPLATE_GET (src_factory_templ), "src");
160 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
164 auparse->encoding = 0;
165 auparse->frequency = 0;
166 auparse->channels = 0;
170 gst_auparse_chain (GstPad *pad, GstBuffer *buf)
179 g_return_if_fail (pad != NULL);
180 g_return_if_fail (GST_IS_PAD (pad));
181 g_return_if_fail (buf != NULL);
183 auparse = GST_AUPARSE (gst_pad_get_parent (pad));
185 GST_DEBUG (0, "gst_auparse_chain: got buffer in '%s'",
186 gst_element_get_name (GST_ELEMENT (auparse)));
188 data = GST_BUFFER_DATA (buf);
189 size = GST_BUFFER_SIZE (buf);
191 /* if we haven't seen any data yet... */
192 if (auparse->size == 0) {
194 guint32 *head = (guint32 *)data;
196 /* normal format is big endian (au is a Sparc format) */
197 if (GUINT32_FROM_BE (*head) == 0x2e736e64) {
200 auparse->offset = GUINT32_FROM_BE (*head);
202 auparse->size = GUINT32_FROM_BE (*head);
204 auparse->encoding = GUINT32_FROM_BE (*head);
206 auparse->frequency = GUINT32_FROM_BE (*head);
208 auparse->channels = GUINT32_FROM_BE (*head);
211 /* but I wouldn't be surprised by a little endian version */
212 } else if (GUINT32_FROM_LE (head) == 0x2e736e64) {
216 auparse->offset = GUINT32_FROM_LE (*head);
218 auparse->size = GUINT32_FROM_LE (*head);
220 auparse->encoding = GUINT32_FROM_LE (*head);
222 auparse->frequency = GUINT32_FROM_LE (*head);
224 auparse->channels = GUINT32_FROM_LE (*head);
228 g_warning ("help, dunno what I'm looking at!\n");
229 gst_buffer_unref(buf);
233 g_print ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld\n",
234 auparse->offset,auparse->size,auparse->encoding,
235 auparse->frequency,auparse->channels);
236 GST_DEBUG (0, "offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
237 auparse->offset,auparse->size,auparse->encoding,
238 auparse->frequency,auparse->channels);
240 switch (auparse->encoding) {
257 g_warning ("help!, dont know how to deal with this format yet\n");
261 tempcaps = GST_CAPS_NEW ("auparse_src",
263 "format", GST_PROPS_STRING ("int"),
264 "endianness", GST_PROPS_INT (G_BYTE_ORDER),
265 "rate", GST_PROPS_INT (auparse->frequency),
266 "channels", GST_PROPS_INT (auparse->channels),
267 "law", GST_PROPS_INT (law),
268 "depth", GST_PROPS_INT (depth),
269 "width", GST_PROPS_INT (depth),
270 "signed", GST_PROPS_BOOLEAN (sign));
272 if (gst_pad_try_set_caps (auparse->srcpad, tempcaps) <= 0) {
273 gst_buffer_unref (buf);
274 gst_element_error (GST_ELEMENT (auparse), "could not set audio caps");
278 newbuf = gst_buffer_new ();
279 GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size-(auparse->offset));
280 memcpy (GST_BUFFER_DATA (newbuf), data+24, size-(auparse->offset));
281 GST_BUFFER_SIZE (newbuf) = size-(auparse->offset);
283 gst_buffer_unref (buf);
285 gst_pad_push (auparse->srcpad, newbuf);
289 gst_pad_push (auparse->srcpad, buf);
294 plugin_init (GModule *module, GstPlugin *plugin)
296 GstElementFactory *factory;
297 GstTypeFactory *type;
299 /* create the plugin structure */
300 /* create an elementfactory for the auparse element and list it */
301 factory = gst_element_factory_new ("auparse", GST_TYPE_AUPARSE,
302 &gst_auparse_details);
303 g_return_val_if_fail (factory != NULL, FALSE);
304 gst_element_factory_set_rank (factory, GST_ELEMENT_RANK_SECONDARY);
306 gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_factory_templ));
307 gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_factory_templ));
309 type = gst_type_factory_new (&audefinition);
311 gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory));
312 gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (type));
317 GstPluginDesc plugin_desc = {