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
30 #include <gstauparse.h>
31 #include <gst/audio/audio.h>
33 /* elementfactory information */
34 static GstElementDetails gst_auparse_details = GST_ELEMENT_DETAILS (
37 "Parse an .au file into raw audio",
38 "Erik Walthinsen <omega@cse.ogi.edu>"
41 static GstStaticPadTemplate gst_auparse_sink_template =
42 GST_STATIC_PAD_TEMPLATE (
46 GST_STATIC_CAPS ( "audio/x-au" )
49 static GstStaticPadTemplate gst_auparse_src_template =
50 GST_STATIC_PAD_TEMPLATE (
55 GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; "
57 "rate = (int) [ 8000, 48000 ], "
58 "channels = (int) [ 1, 2 ]"
62 /* AuParse signals and args */
73 static void gst_auparse_base_init (gpointer g_class);
74 static void gst_auparse_class_init (GstAuParseClass *klass);
75 static void gst_auparse_init (GstAuParse *auparse);
77 static void gst_auparse_chain (GstPad *pad,GstData *_data);
79 static GstElementClass *parent_class = NULL;
80 /*static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; */
83 gst_auparse_get_type (void)
85 static GType auparse_type = 0;
88 static const GTypeInfo auparse_info = {
89 sizeof(GstAuParseClass),
90 gst_auparse_base_init,
92 (GClassInitFunc) gst_auparse_class_init,
97 (GInstanceInitFunc) gst_auparse_init,
99 auparse_type = g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info, 0);
105 gst_auparse_base_init (gpointer g_class)
107 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
109 gst_element_class_add_pad_template (element_class,
110 gst_static_pad_template_get (&gst_auparse_sink_template));
111 gst_element_class_add_pad_template (element_class,
112 gst_static_pad_template_get (&gst_auparse_src_template));
113 gst_element_class_set_details (element_class, &gst_auparse_details);
118 gst_auparse_class_init (GstAuParseClass *klass)
120 GstElementClass *gstelement_class;
122 gstelement_class = (GstElementClass*) klass;
124 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
128 gst_auparse_init (GstAuParse *auparse)
130 auparse->sinkpad = gst_pad_new_from_template (
131 gst_static_pad_template_get (&gst_auparse_sink_template), "sink");
132 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
133 gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);
135 auparse->srcpad = gst_pad_new_from_template (
136 gst_static_pad_template_get (&gst_auparse_src_template), "src");
137 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
141 auparse->encoding = 0;
142 auparse->frequency = 0;
143 auparse->channels = 0;
147 gst_auparse_chain (GstPad *pad, GstData *_data)
149 GstBuffer *buf = GST_BUFFER (_data);
157 g_return_if_fail (pad != NULL);
158 g_return_if_fail (GST_IS_PAD (pad));
159 g_return_if_fail (buf != NULL);
161 auparse = GST_AUPARSE (gst_pad_get_parent (pad));
163 GST_DEBUG ("gst_auparse_chain: got buffer in '%s'",
164 gst_element_get_name (GST_ELEMENT (auparse)));
166 data = GST_BUFFER_DATA (buf);
167 size = GST_BUFFER_SIZE (buf);
169 /* if we haven't seen any data yet... */
170 if (auparse->size == 0) {
172 guint32 *head = (guint32 *)data;
174 /* normal format is big endian (au is a Sparc format) */
175 if (GUINT32_FROM_BE (*head) == 0x2e736e64) {
178 auparse->offset = GUINT32_FROM_BE (*head);
180 auparse->size = GUINT32_FROM_BE (*head);
182 auparse->encoding = GUINT32_FROM_BE (*head);
184 auparse->frequency = GUINT32_FROM_BE (*head);
186 auparse->channels = GUINT32_FROM_BE (*head);
189 /* and of course, someone had to invent a little endian
190 * version. Used by DEC systems. */
191 } else if (GUINT32_FROM_LE (*head) == 0x0064732E) {
195 auparse->offset = GUINT32_FROM_LE (*head);
197 auparse->size = GUINT32_FROM_LE (*head);
199 auparse->encoding = GUINT32_FROM_LE (*head);
201 auparse->frequency = GUINT32_FROM_LE (*head);
203 auparse->channels = GUINT32_FROM_LE (*head);
207 g_warning ("help, dunno what I'm looking at!\n");
208 gst_buffer_unref(buf);
212 g_print ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld\n",
213 auparse->offset,auparse->size,auparse->encoding,
214 auparse->frequency,auparse->channels);
215 GST_DEBUG ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
216 auparse->offset,auparse->size,auparse->encoding,
217 auparse->frequency,auparse->channels);
219 switch (auparse->encoding) {
236 g_warning ("help!, dont know how to deal with this format yet\n");
241 tempcaps = gst_caps_new_simple ("audio/x-alaw",
242 "rate", G_TYPE_INT, auparse->frequency,
243 "channels", G_TYPE_INT, auparse->channels, NULL);
245 tempcaps = gst_caps_new_simple ("audio/x-raw-int",
246 "endianness", G_TYPE_INT, G_BIG_ENDIAN,
247 "rate", G_TYPE_INT, auparse->frequency,
248 "channels", G_TYPE_INT, auparse->channels,
249 "depth", G_TYPE_INT, depth,
250 "width", G_TYPE_INT, depth,
251 "signed", G_TYPE_BOOLEAN, sign, NULL);
254 if (gst_pad_try_set_caps (auparse->srcpad, tempcaps) <= 0) {
255 gst_buffer_unref (buf);
256 gst_element_error (GST_ELEMENT (auparse), "could not set audio caps");
260 newbuf = gst_buffer_new ();
261 GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size-(auparse->offset));
262 memcpy (GST_BUFFER_DATA (newbuf), data+24, size-(auparse->offset));
263 GST_BUFFER_SIZE (newbuf) = size-(auparse->offset);
265 gst_buffer_unref (buf);
267 gst_pad_push (auparse->srcpad, GST_DATA (newbuf));
271 gst_pad_push (auparse->srcpad, GST_DATA (buf));
276 plugin_init (GstPlugin *plugin)
278 if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,