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.
19 /* Element-Checklist-Version: 5 */
21 /* 2001/04/03 - Updated parseau to use caps nego
22 * Zaheer Merali <zaheer@grid9.net
31 #include <gstauparse.h>
32 #include <gst/audio/audio.h>
34 /* elementfactory information */
35 static GstElementDetails gst_auparse_details =
36 GST_ELEMENT_DETAILS (".au parser",
38 "Parse an .au file into raw audio",
39 "Erik Walthinsen <omega@cse.ogi.edu>");
41 static GstStaticPadTemplate gst_auparse_sink_template =
42 GST_STATIC_PAD_TEMPLATE ("sink",
45 GST_STATIC_CAPS ("audio/x-au")
48 static GstStaticPadTemplate gst_auparse_src_template =
49 GST_STATIC_PAD_TEMPLATE ("src",
52 GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; " /* does not support 24bit without patch */
53 GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS "; "
55 "rate = (int) [ 8000, 48000 ], "
56 "channels = (int) [ 1, 2 ]; "
58 "rate = (int) [ 8000, 48000 ], " "channels = (int) [ 1, 2 ]")
61 /* AuParse signals and args */
74 static void gst_auparse_base_init (gpointer g_class);
75 static void gst_auparse_class_init (GstAuParseClass * klass);
76 static void gst_auparse_init (GstAuParse * auparse);
78 static void gst_auparse_chain (GstPad * pad, GstData * _data);
80 static GstElementClass *parent_class = NULL;
82 /*static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; */
85 gst_auparse_get_type (void)
87 static GType auparse_type = 0;
90 static const GTypeInfo auparse_info = {
91 sizeof (GstAuParseClass),
92 gst_auparse_base_init,
94 (GClassInitFunc) gst_auparse_class_init,
99 (GInstanceInitFunc) gst_auparse_init,
103 g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info,
110 gst_auparse_base_init (gpointer g_class)
112 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
114 gst_element_class_add_pad_template (element_class,
115 gst_static_pad_template_get (&gst_auparse_sink_template));
116 gst_element_class_add_pad_template (element_class,
117 gst_static_pad_template_get (&gst_auparse_src_template));
118 gst_element_class_set_details (element_class, &gst_auparse_details);
123 gst_auparse_class_init (GstAuParseClass * klass)
125 GstElementClass *gstelement_class;
127 gstelement_class = (GstElementClass *) klass;
129 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
133 gst_auparse_init (GstAuParse * auparse)
136 gst_pad_new_from_template (gst_static_pad_template_get
137 (&gst_auparse_sink_template), "sink");
138 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
139 gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);
142 gst_pad_new_from_template (gst_static_pad_template_get
143 (&gst_auparse_src_template), "src");
144 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
145 gst_pad_use_explicit_caps (auparse->srcpad);
149 auparse->encoding = 0;
150 auparse->frequency = 0;
151 auparse->channels = 0;
155 gst_auparse_chain (GstPad * pad, GstData * _data)
157 GstBuffer *buf = GST_BUFFER (_data);
162 gint law, depth, ieee;
164 g_return_if_fail (pad != NULL);
165 g_return_if_fail (GST_IS_PAD (pad));
166 g_return_if_fail (buf != NULL);
168 auparse = GST_AUPARSE (gst_pad_get_parent (pad));
170 GST_DEBUG ("gst_auparse_chain: got buffer in '%s'",
171 gst_element_get_name (GST_ELEMENT (auparse)));
173 data = GST_BUFFER_DATA (buf);
174 size = GST_BUFFER_SIZE (buf);
176 /* if we haven't seen any data yet... */
177 if (auparse->size == 0) {
179 guint32 *head = (guint32 *) data;
181 /* normal format is big endian (au is a Sparc format) */
182 if (GUINT32_FROM_BE (*head) == 0x2e736e64) {
185 auparse->offset = GUINT32_FROM_BE (*head);
187 auparse->size = GUINT32_FROM_BE (*head);
189 auparse->encoding = GUINT32_FROM_BE (*head);
191 auparse->frequency = GUINT32_FROM_BE (*head);
193 auparse->channels = GUINT32_FROM_BE (*head);
196 /* and of course, someone had to invent a little endian
197 * version. Used by DEC systems. */
198 } else if (GUINT32_FROM_LE (*head) == 0x0064732E) {
201 auparse->offset = GUINT32_FROM_LE (*head);
203 auparse->size = GUINT32_FROM_LE (*head);
205 auparse->encoding = GUINT32_FROM_LE (*head);
207 auparse->frequency = GUINT32_FROM_LE (*head);
209 auparse->channels = GUINT32_FROM_LE (*head);
213 g_warning ("help, dunno what I'm looking at!\n");
214 gst_buffer_unref (buf);
219 ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld\n",
220 auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
223 ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
224 auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
229 http://www.opengroup.org/public/pubs/external/auformat.html
230 http://astronomy.swin.edu.au/~pbourke/dataformats/au/
232 http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/AU/Samples.html
235 switch (auparse->encoding) {
237 case 1: /* 8-bit ISDN mu-law */
242 case 2: /* 8-bit linear PCM */
246 case 3: /* 16-bit linear PCM */
250 case 4: /* 24-bit linear PCM */
254 case 5: /* 32-bit linear PCM */
259 case 27: /* 8-bit ISDN a-law */
264 case 6: /* 32 bit IEEE floating point */
268 case 7: /* 64 bit IEEE floating point */
273 case 23: /* 4 bit CCITT G721 ADPCM */
274 case 24: /* CCITT G722 ADPCM */
275 case 25: /* CCITT G723 ADPCM */
276 case 26: /* 5 bit CCITT G723 ADPCM */
279 g_warning ("help!, dont know how to deal with this format yet\n");
285 gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
286 "rate", G_TYPE_INT, auparse->frequency, "channels", G_TYPE_INT,
287 auparse->channels, NULL);
289 tempcaps = gst_caps_new_simple ("audio/x-raw-float",
290 "width", G_TYPE_INT, depth,
291 "endianness", G_TYPE_INT,
292 auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, NULL);
294 tempcaps = gst_caps_new_simple ("audio/x-raw-int",
295 "endianness", G_TYPE_INT,
296 auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, "rate", G_TYPE_INT,
297 auparse->frequency, "channels", G_TYPE_INT, auparse->channels,
298 "depth", G_TYPE_INT, depth, "width", G_TYPE_INT, depth, "signed",
299 G_TYPE_BOOLEAN, TRUE, NULL);
302 if (!gst_pad_set_explicit_caps (auparse->srcpad, tempcaps)) {
303 gst_buffer_unref (buf);
307 newbuf = gst_buffer_new ();
308 GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size - (auparse->offset));
309 memcpy (GST_BUFFER_DATA (newbuf), data + 24, size - (auparse->offset));
310 GST_BUFFER_SIZE (newbuf) = size - (auparse->offset);
312 gst_buffer_unref (buf);
314 gst_pad_push (auparse->srcpad, GST_DATA (newbuf));
318 gst_pad_push (auparse->srcpad, GST_DATA (buf));
323 plugin_init (GstPlugin * plugin)
325 if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
333 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
336 "parses au streams", plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN)