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",
37 "Codec/Demuxer/Audio",
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 ], "
55 "channels = (int) [ 1, 2 ]" "; " "audio/x-mulaw, "
56 "rate = (int) [ 8000, 192000 ], " "channels = (int) [ 1, 2 ]" "; "
57 /* Nothing to decode those ADPCM streams for now */
58 "audio/x-adpcm, " "layout = (string) { g721, g722, g723_3, g723_5 }")
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 GstElementStateReturn gst_auparse_change_state (GstElement * element);
82 static GstElementClass *parent_class = NULL;
84 /*static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; */
87 gst_auparse_get_type (void)
89 static GType auparse_type = 0;
92 static const GTypeInfo auparse_info = {
93 sizeof (GstAuParseClass),
94 gst_auparse_base_init,
96 (GClassInitFunc) gst_auparse_class_init,
101 (GInstanceInitFunc) gst_auparse_init,
105 g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info,
112 gst_auparse_base_init (gpointer g_class)
114 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
116 gst_element_class_add_pad_template (element_class,
117 gst_static_pad_template_get (&gst_auparse_sink_template));
118 gst_element_class_add_pad_template (element_class,
119 gst_static_pad_template_get (&gst_auparse_src_template));
120 gst_element_class_set_details (element_class, &gst_auparse_details);
125 gst_auparse_class_init (GstAuParseClass * klass)
127 GstElementClass *gstelement_class;
129 gstelement_class = (GstElementClass *) klass;
131 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
133 gstelement_class->change_state = gst_auparse_change_state;
137 gst_auparse_init (GstAuParse * auparse)
140 gst_pad_new_from_template (gst_static_pad_template_get
141 (&gst_auparse_sink_template), "sink");
142 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
143 gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);
145 auparse->srcpad = NULL;
146 #if 0 /* FIXME: spider */
147 gst_pad_new_from_template (gst_static_pad_template_get
148 (&gst_auparse_src_template), "src");
149 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
150 gst_pad_use_explicit_caps (auparse->srcpad);
155 auparse->encoding = 0;
156 auparse->frequency = 0;
157 auparse->channels = 0;
161 gst_auparse_chain (GstPad * pad, GstData * _data)
163 GstBuffer *buf = GST_BUFFER (_data);
168 gint law = 0, depth, ieee = 0;
173 g_return_if_fail (pad != NULL);
174 g_return_if_fail (GST_IS_PAD (pad));
175 g_return_if_fail (buf != NULL);
177 auparse = GST_AUPARSE (gst_pad_get_parent (pad));
179 GST_DEBUG ("gst_auparse_chain: got buffer in '%s'",
180 gst_element_get_name (GST_ELEMENT (auparse)));
182 data = GST_BUFFER_DATA (buf);
183 size = GST_BUFFER_SIZE (buf);
185 /* if we haven't seen any data yet... */
186 if (auparse->size == 0) {
188 guint32 *head = (guint32 *) data;
190 /* normal format is big endian (au is a Sparc format) */
191 if (GST_READ_UINT32_BE (head) == 0x2e736e64) { /* ".snd" */
194 auparse->offset = GST_READ_UINT32_BE (head);
196 /* Do not trust size, could be set to -1 : unknown */
197 auparse->size = GST_READ_UINT32_BE (head);
199 auparse->encoding = GST_READ_UINT32_BE (head);
201 auparse->frequency = GST_READ_UINT32_BE (head);
203 auparse->channels = GST_READ_UINT32_BE (head);
206 /* and of course, someone had to invent a little endian
207 * version. Used by DEC systems. */
208 } else if (GST_READ_UINT32_LE (head) == 0x0064732E) { /* other source say it is "dns." */
211 auparse->offset = GST_READ_UINT32_LE (head);
213 /* Do not trust size, could be set to -1 : unknown */
214 auparse->size = GST_READ_UINT32_LE (head);
216 auparse->encoding = GST_READ_UINT32_LE (*head);
218 auparse->frequency = GST_READ_UINT32_LE (*head);
220 auparse->channels = GST_READ_UINT32_LE (*head);
224 g_warning ("help, dunno what I'm looking at!\n");
225 gst_buffer_unref (buf);
230 ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
231 auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
236 http://www.opengroup.org/public/pubs/external/auformat.html
237 http://astronomy.swin.edu.au/~pbourke/dataformats/au/
238 Solaris headers : /usr/include/audio/au.h
239 libsndfile : src/au.c
241 http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/AU/Samples.html
244 switch (auparse->encoding) {
246 case 1: /* 8-bit ISDN mu-law G.711 */
250 case 27: /* 8-bit ISDN A-law G.711 */
255 case 2: /* 8-bit linear PCM */
258 case 3: /* 16-bit linear PCM */
261 case 4: /* 24-bit linear PCM */
264 case 5: /* 32-bit linear PCM */
268 case 6: /* 32-bit IEEE floating point */
272 case 7: /* 64-bit IEEE floating point */
277 case 23: /* 4-bit CCITT G.721 ADPCM 32kbps -> modplug/libsndfile (compressed 8-bit mu-law) */
278 strcpy (layout, "g721");
280 case 24: /* 8-bit CCITT G.722 ADPCM -> rtp */
281 strcpy (layout, "g722");
283 case 25: /* 3-bit CCITT G.723.3 ADPCM 24kbps -> rtp/xine/modplug/libsndfile */
284 strcpy (layout, "g723_3");
286 case 26: /* 5-bit CCITT G.723.5 ADPCM 40kbps -> rtp/xine/modplug/libsndfile */
287 strcpy (layout, "g723_5");
290 case 8: /* Fragmented sample data */
291 case 9: /* AU_ENCODING_NESTED */
293 case 10: /* DSP program */
294 case 11: /* DSP 8-bit fixed point */
295 case 12: /* DSP 16-bit fixed point */
296 case 13: /* DSP 24-bit fixed point */
297 case 14: /* DSP 32-bit fixed point */
299 case 16: /* AU_ENCODING_DISPLAY : non-audio display data */
300 case 17: /* AU_ENCODING_MULAW_SQUELCH */
302 case 18: /* 16-bit linear with emphasis */
303 case 19: /* 16-bit linear compressed (NeXT) */
304 case 20: /* 16-bit linear with emphasis and compression */
306 case 21: /* Music kit DSP commands */
307 case 22: /* Music kit DSP commands samples */
310 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL), (NULL));
311 gst_buffer_unref (buf);
316 gst_pad_new_from_template (gst_static_pad_template_get
317 (&gst_auparse_src_template), "src");
318 gst_pad_use_explicit_caps (auparse->srcpad);
322 gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
323 "rate", G_TYPE_INT, auparse->frequency, "channels", G_TYPE_INT,
324 auparse->channels, NULL);
326 tempcaps = gst_caps_new_simple ("audio/x-raw-float",
327 "width", G_TYPE_INT, depth,
328 "endianness", G_TYPE_INT,
329 auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, NULL);
330 } else if (layout[0]) {
331 tempcaps = gst_caps_new_simple ("audio/x-adpcm",
332 "layout", G_TYPE_STRING, layout, NULL);
334 tempcaps = gst_caps_new_simple ("audio/x-raw-int",
335 "endianness", G_TYPE_INT,
336 auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, "rate", G_TYPE_INT,
337 auparse->frequency, "channels", G_TYPE_INT, auparse->channels,
338 "depth", G_TYPE_INT, depth, "width", G_TYPE_INT, depth, "signed",
339 G_TYPE_BOOLEAN, TRUE, NULL);
342 if (!gst_pad_set_explicit_caps (auparse->srcpad, tempcaps)) {
343 gst_buffer_unref (buf);
344 gst_object_unref (GST_OBJECT (auparse->srcpad));
345 auparse->srcpad = NULL;
349 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
351 newbuf = gst_buffer_new ();
352 GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size - (auparse->offset));
353 memcpy (GST_BUFFER_DATA (newbuf), data + (auparse->offset),
354 size - (auparse->offset));
355 GST_BUFFER_SIZE (newbuf) = size - (auparse->offset);
357 gst_buffer_unref (buf);
359 gst_pad_push (auparse->srcpad, GST_DATA (newbuf));
363 gst_pad_push (auparse->srcpad, GST_DATA (buf));
366 static GstElementStateReturn
367 gst_auparse_change_state (GstElement * element)
369 GstAuParse *auparse = GST_AUPARSE (element);
371 switch (GST_STATE_TRANSITION (element)) {
372 case GST_STATE_PAUSED_TO_READY:
373 if (auparse->srcpad) {
374 gst_element_remove_pad (element, auparse->srcpad);
375 auparse->srcpad = NULL;
382 if (parent_class->change_state)
383 return parent_class->change_state (element);
385 return GST_STATE_SUCCESS;
389 plugin_init (GstPlugin * plugin)
391 if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
399 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
402 "parses au streams", plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN)