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",
51 GST_PAD_SOMETIMES, /* FIXME: spider */
52 GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; " /* 24-bit PCM is barely supported by gstreamer actually */
53 GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS "; " /* 64-bit float is barely supported by gstreamer actually */
54 "audio/x-alaw, " "rate = (int) [ 8000, 192000 ], " "channels = (int) [ 1, 2 ]; " "audio/x-mulaw, " "rate = (int) [ 8000, 192000 ], " "channels = (int) [ 1, 2 ]" /*"; "
56 "layout = (string) { g721, g722, g723_3, g723_5 }" */ )
57 /* Nothing to decode those ADPCM streams for now */
60 /* 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 GstElementStateReturn gst_auparse_change_state (GstElement * element);
81 static GstElementClass *parent_class = NULL;
83 /*static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; */
86 gst_auparse_get_type (void)
88 static GType auparse_type = 0;
91 static const GTypeInfo auparse_info = {
92 sizeof (GstAuParseClass),
93 gst_auparse_base_init,
95 (GClassInitFunc) gst_auparse_class_init,
100 (GInstanceInitFunc) gst_auparse_init,
104 g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info,
111 gst_auparse_base_init (gpointer g_class)
113 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
115 gst_element_class_add_pad_template (element_class,
116 gst_static_pad_template_get (&gst_auparse_sink_template));
117 gst_element_class_add_pad_template (element_class,
118 gst_static_pad_template_get (&gst_auparse_src_template));
119 gst_element_class_set_details (element_class, &gst_auparse_details);
124 gst_auparse_class_init (GstAuParseClass * klass)
126 GstElementClass *gstelement_class;
128 gstelement_class = (GstElementClass *) klass;
130 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
132 gstelement_class->change_state = gst_auparse_change_state;
136 gst_auparse_init (GstAuParse * auparse)
139 gst_pad_new_from_template (gst_static_pad_template_get
140 (&gst_auparse_sink_template), "sink");
141 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
142 gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);
144 auparse->srcpad = NULL;
145 #if 0 /* FIXME: spider */
146 gst_pad_new_from_template (gst_static_pad_template_get
147 (&gst_auparse_src_template), "src");
148 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
149 gst_pad_use_explicit_caps (auparse->srcpad);
154 auparse->encoding = 0;
155 auparse->frequency = 0;
156 auparse->channels = 0;
160 gst_auparse_chain (GstPad * pad, GstData * _data)
162 GstBuffer *buf = GST_BUFFER (_data);
167 gint law = 0, depth, ieee = 0;
169 g_return_if_fail (pad != NULL);
170 g_return_if_fail (GST_IS_PAD (pad));
171 g_return_if_fail (buf != NULL);
173 auparse = GST_AUPARSE (gst_pad_get_parent (pad));
175 GST_DEBUG ("gst_auparse_chain: got buffer in '%s'",
176 gst_element_get_name (GST_ELEMENT (auparse)));
178 data = GST_BUFFER_DATA (buf);
179 size = GST_BUFFER_SIZE (buf);
181 /* if we haven't seen any data yet... */
182 if (auparse->size == 0) {
184 guint32 *head = (guint32 *) data;
186 /* normal format is big endian (au is a Sparc format) */
187 if (GUINT32_FROM_BE (*head) == 0x2e736e64) { /* ".snd" */
190 auparse->offset = GUINT32_FROM_BE (*head);
192 auparse->size = GUINT32_FROM_BE (*head); /* Do not trust size, could be set to -1 : unknown */
194 auparse->encoding = GUINT32_FROM_BE (*head);
196 auparse->frequency = GUINT32_FROM_BE (*head);
198 auparse->channels = GUINT32_FROM_BE (*head);
201 /* and of course, someone had to invent a little endian
202 * version. Used by DEC systems. */
203 } else if (GUINT32_FROM_LE (*head) == 0x0064732E) { /* other source say it is "dns." */
206 auparse->offset = GUINT32_FROM_LE (*head);
208 auparse->size = GUINT32_FROM_LE (*head); /* Do not trust size, could be set to -1 : unknown */
210 auparse->encoding = GUINT32_FROM_LE (*head);
212 auparse->frequency = GUINT32_FROM_LE (*head);
214 auparse->channels = GUINT32_FROM_LE (*head);
218 g_warning ("help, dunno what I'm looking at!\n");
219 gst_buffer_unref (buf);
224 ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
225 auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
230 http://www.opengroup.org/public/pubs/external/auformat.html
231 http://astronomy.swin.edu.au/~pbourke/dataformats/au/
232 Solaris headers : /usr/include/audio/au.h
233 libsndfile : src/au.c
235 http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/AU/Samples.html
238 switch (auparse->encoding) {
240 case 1: /* 8-bit ISDN mu-law G.711 */
244 case 27: /* 8-bit ISDN A-law G.711 */
249 case 2: /* 8-bit linear PCM */
252 case 3: /* 16-bit linear PCM */
255 case 4: /* 24-bit linear PCM */
258 case 5: /* 32-bit linear PCM */
262 case 6: /* 32-bit IEEE floating point */
266 case 7: /* 64-bit IEEE floating point */
271 case 8: /* Fragmented sample data */
272 case 9: /* AU_ENCODING_NESTED */
274 case 10: /* DSP program */
275 case 11: /* DSP 8-bit fixed point */
276 case 12: /* DSP 16-bit fixed point */
277 case 13: /* DSP 24-bit fixed point */
278 case 14: /* DSP 32-bit fixed point */
280 case 16: /* AU_ENCODING_DISPLAY : non-audio display data */
281 case 17: /* AU_ENCODING_MULAW_SQUELCH */
283 case 18: /* 16-bit linear with emphasis */
284 case 19: /* 16-bit linear compressed (NeXT) */
285 case 20: /* 16-bit linear with emphasis and compression */
287 case 21: /* Music kit DSP commands */
288 case 22: /* Music kit DSP commands samples */
290 case 23: /* 4-bit CCITT G.721 ADPCM 32kbps -> modplug/libsndfile (compressed 8-bit mu-law) */
291 case 24: /* 8-bit CCITT G.722 ADPCM -> rtp */
292 case 25: /* 3-bit CCITT G.723.3 ADPCM 24kbps -> rtp/xine/modplug/libsndfile */
293 case 26: /* 5-bit CCITT G.723.5 ADPCM 40kbps -> rtp/xine/modplug/libsndfile */
296 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL), (NULL));
297 gst_buffer_unref (buf);
302 gst_pad_new_from_template (gst_static_pad_template_get
303 (&gst_auparse_src_template), "src");
304 gst_pad_use_explicit_caps (auparse->srcpad);
308 gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
309 "rate", G_TYPE_INT, auparse->frequency, "channels", G_TYPE_INT,
310 auparse->channels, NULL);
312 tempcaps = gst_caps_new_simple ("audio/x-raw-float",
313 "width", G_TYPE_INT, depth,
314 "endianness", G_TYPE_INT,
315 auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, NULL);
318 tempcaps = gst_caps_new_simple ("audio/x-adpcm",
319 "layout", G_TYPE_STRING, layout, NULL);
322 tempcaps = gst_caps_new_simple ("audio/x-raw-int",
323 "endianness", G_TYPE_INT,
324 auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, "rate", G_TYPE_INT,
325 auparse->frequency, "channels", G_TYPE_INT, auparse->channels,
326 "depth", G_TYPE_INT, depth, "width", G_TYPE_INT, depth, "signed",
327 G_TYPE_BOOLEAN, TRUE, NULL);
330 if (!gst_pad_set_explicit_caps (auparse->srcpad, tempcaps)) {
331 gst_buffer_unref (buf);
332 gst_object_unref (GST_OBJECT (auparse->srcpad));
333 auparse->srcpad = NULL;
337 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
339 newbuf = gst_buffer_new ();
340 GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size - (auparse->offset));
341 memcpy (GST_BUFFER_DATA (newbuf), data + (auparse->offset),
342 size - (auparse->offset));
343 GST_BUFFER_SIZE (newbuf) = size - (auparse->offset);
345 gst_buffer_unref (buf);
347 gst_pad_push (auparse->srcpad, GST_DATA (newbuf));
351 gst_pad_push (auparse->srcpad, GST_DATA (buf));
354 static GstElementStateReturn
355 gst_auparse_change_state (GstElement * element)
357 GstAuParse *auparse = GST_AUPARSE (element);
359 switch (GST_STATE_TRANSITION (element)) {
360 case GST_STATE_PAUSED_TO_READY:
361 if (auparse->srcpad) {
362 gst_element_remove_pad (element, auparse->srcpad);
363 auparse->srcpad = NULL;
370 if (parent_class->change_state)
371 return parent_class->change_state (element);
373 return GST_STATE_SUCCESS;
377 plugin_init (GstPlugin * plugin)
379 if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
387 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
390 "parses au streams", plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN)