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 Abbas Merali <zaheerabbas at merali dot org>
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 "; "
53 /* we don't use GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS
54 because of min buffer-frames which is 1, not 0 */
56 "rate = (int) [ 1, MAX ], "
57 "channels = (int) [ 1, MAX ], "
58 "endianness = (int) { LITTLE_ENDIAN , BIG_ENDIAN }, "
59 "width = (int) { 32, 64 }, "
60 "buffer-frames = (int) [ 0, MAX]" "; "
62 "rate = (int) [ 8000, 192000 ], "
63 "channels = (int) [ 1, 2 ]" "; "
65 "rate = (int) [ 8000, 192000 ], " "channels = (int) [ 1, 2 ]" "; "
66 /* Nothing to decode those ADPCM streams for now */
67 "audio/x-adpcm, " "layout = (string) { g721, g722, g723_3, g723_5 }")
70 /* AuParse signals and args */
83 static void gst_auparse_base_init (gpointer g_class);
84 static void gst_auparse_class_init (GstAuParseClass * klass);
85 static void gst_auparse_init (GstAuParse * auparse);
87 static void gst_auparse_chain (GstPad * pad, GstData * _data);
89 static GstStateChangeReturn gst_auparse_change_state (GstElement * element,
90 GstStateChange transition);
92 static GstElementClass *parent_class = NULL;
94 /*static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; */
97 gst_auparse_get_type (void)
99 static GType auparse_type = 0;
102 static const GTypeInfo auparse_info = {
103 sizeof (GstAuParseClass),
104 gst_auparse_base_init,
106 (GClassInitFunc) gst_auparse_class_init,
111 (GInstanceInitFunc) gst_auparse_init,
115 g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info,
122 gst_auparse_base_init (gpointer g_class)
124 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
126 gst_element_class_add_pad_template (element_class,
127 gst_static_pad_template_get (&gst_auparse_sink_template));
128 gst_element_class_add_pad_template (element_class,
129 gst_static_pad_template_get (&gst_auparse_src_template));
130 gst_element_class_set_details (element_class, &gst_auparse_details);
135 gst_auparse_class_init (GstAuParseClass * klass)
137 GstElementClass *gstelement_class;
139 gstelement_class = (GstElementClass *) klass;
141 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
143 gstelement_class->change_state = gst_auparse_change_state;
147 gst_auparse_init (GstAuParse * auparse)
150 gst_pad_new_from_template (gst_static_pad_template_get
151 (&gst_auparse_sink_template), "sink");
152 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
153 gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);
155 auparse->srcpad = NULL;
156 #if 0 /* FIXME: spider */
157 gst_pad_new_from_template (gst_static_pad_template_get
158 (&gst_auparse_src_template), "src");
159 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
160 gst_pad_use_explicit_caps (auparse->srcpad);
165 auparse->encoding = 0;
166 auparse->frequency = 0;
167 auparse->channels = 0;
171 gst_auparse_chain (GstPad * pad, GstData * _data)
173 GstBuffer *buf = GST_BUFFER (_data);
178 gint law = 0, depth = 0, ieee = 0;
183 g_return_if_fail (pad != NULL);
184 g_return_if_fail (GST_IS_PAD (pad));
185 g_return_if_fail (buf != NULL);
187 auparse = GST_AUPARSE (gst_pad_get_parent (pad));
189 GST_DEBUG ("gst_auparse_chain: got buffer in '%s'",
190 gst_element_get_name (GST_ELEMENT (auparse)));
192 data = GST_BUFFER_DATA (buf);
193 size = GST_BUFFER_SIZE (buf);
195 /* if we haven't seen any data yet... */
196 if (auparse->size == 0) {
198 guint32 *head = (guint32 *) data;
200 /* normal format is big endian (au is a Sparc format) */
201 if (GST_READ_UINT32_BE (head) == 0x2e736e64) { /* ".snd" */
204 auparse->offset = GST_READ_UINT32_BE (head);
206 /* Do not trust size, could be set to -1 : unknown */
207 auparse->size = GST_READ_UINT32_BE (head);
209 auparse->encoding = GST_READ_UINT32_BE (head);
211 auparse->frequency = GST_READ_UINT32_BE (head);
213 auparse->channels = GST_READ_UINT32_BE (head);
216 /* and of course, someone had to invent a little endian
217 * version. Used by DEC systems. */
218 } else if (GST_READ_UINT32_LE (head) == 0x0064732E) { /* other source say it is "dns." */
221 auparse->offset = GST_READ_UINT32_LE (head);
223 /* Do not trust size, could be set to -1 : unknown */
224 auparse->size = GST_READ_UINT32_LE (head);
226 auparse->encoding = GST_READ_UINT32_LE (head);
228 auparse->frequency = GST_READ_UINT32_LE (head);
230 auparse->channels = GST_READ_UINT32_LE (head);
234 GST_ELEMENT_ERROR (auparse, STREAM, WRONG_TYPE, (NULL), (NULL));
235 gst_buffer_unref (buf);
240 ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
241 auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
246 http://www.opengroup.org/public/pubs/external/auformat.html
247 http://astronomy.swin.edu.au/~pbourke/dataformats/au/
248 Solaris headers : /usr/include/audio/au.h
249 libsndfile : src/au.c
251 http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/AU/Samples.html
254 switch (auparse->encoding) {
256 case 1: /* 8-bit ISDN mu-law G.711 */
260 case 27: /* 8-bit ISDN A-law G.711 */
265 case 2: /* 8-bit linear PCM */
268 case 3: /* 16-bit linear PCM */
271 case 4: /* 24-bit linear PCM */
274 case 5: /* 32-bit linear PCM */
278 case 6: /* 32-bit IEEE floating point */
282 case 7: /* 64-bit IEEE floating point */
287 case 23: /* 4-bit CCITT G.721 ADPCM 32kbps -> modplug/libsndfile (compressed 8-bit mu-law) */
288 strcpy (layout, "g721");
290 case 24: /* 8-bit CCITT G.722 ADPCM -> rtp */
291 strcpy (layout, "g722");
293 case 25: /* 3-bit CCITT G.723.3 ADPCM 24kbps -> rtp/xine/modplug/libsndfile */
294 strcpy (layout, "g723_3");
296 case 26: /* 5-bit CCITT G.723.5 ADPCM 40kbps -> rtp/xine/modplug/libsndfile */
297 strcpy (layout, "g723_5");
300 case 8: /* Fragmented sample data */
301 case 9: /* AU_ENCODING_NESTED */
303 case 10: /* DSP program */
304 case 11: /* DSP 8-bit fixed point */
305 case 12: /* DSP 16-bit fixed point */
306 case 13: /* DSP 24-bit fixed point */
307 case 14: /* DSP 32-bit fixed point */
309 case 16: /* AU_ENCODING_DISPLAY : non-audio display data */
310 case 17: /* AU_ENCODING_MULAW_SQUELCH */
312 case 18: /* 16-bit linear with emphasis */
313 case 19: /* 16-bit linear compressed (NeXT) */
314 case 20: /* 16-bit linear with emphasis and compression */
316 case 21: /* Music kit DSP commands */
317 case 22: /* Music kit DSP commands samples */
320 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL), (NULL));
321 gst_buffer_unref (buf);
326 gst_pad_new_from_template (gst_static_pad_template_get
327 (&gst_auparse_src_template), "src");
328 gst_pad_use_explicit_caps (auparse->srcpad);
332 gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
333 "rate", G_TYPE_INT, auparse->frequency,
334 "channels", G_TYPE_INT, auparse->channels, NULL);
336 tempcaps = gst_caps_new_simple ("audio/x-raw-float",
337 "rate", G_TYPE_INT, auparse->frequency,
338 "channels", G_TYPE_INT, auparse->channels,
339 "endianness", G_TYPE_INT,
340 auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, "width", G_TYPE_INT,
341 depth, "buffer-frames", G_TYPE_INT, 0, NULL);
342 } else if (layout[0]) {
343 tempcaps = gst_caps_new_simple ("audio/x-adpcm",
344 "layout", G_TYPE_STRING, layout, NULL);
346 tempcaps = gst_caps_new_simple ("audio/x-raw-int",
347 "rate", G_TYPE_INT, auparse->frequency,
348 "channels", G_TYPE_INT, auparse->channels,
349 "endianness", G_TYPE_INT,
350 auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, "depth", G_TYPE_INT,
351 depth, "width", G_TYPE_INT, depth, "signed", G_TYPE_BOOLEAN, TRUE,
355 if (!gst_pad_set_explicit_caps (auparse->srcpad, tempcaps)) {
356 GST_ELEMENT_ERROR (auparse, CORE, NEGOTIATION, (NULL), (NULL));
357 gst_buffer_unref (buf);
358 gst_object_unref (GST_OBJECT (auparse->srcpad));
359 auparse->srcpad = NULL;
363 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
365 newbuf = gst_buffer_new ();
366 GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size - (auparse->offset));
367 memcpy (GST_BUFFER_DATA (newbuf), data + (auparse->offset),
368 size - (auparse->offset));
369 GST_BUFFER_SIZE (newbuf) = size - (auparse->offset);
371 gst_buffer_unref (buf);
373 gst_pad_push (auparse->srcpad, GST_DATA (newbuf));
377 gst_pad_push (auparse->srcpad, GST_DATA (buf));
380 static GstStateChangeReturn
381 gst_auparse_change_state (GstElement * element, GstStateChange transition)
383 GstAuParse *auparse = GST_AUPARSE (element);
385 switch (transition) {
386 case GST_STATE_CHANGE_PAUSED_TO_READY:
387 if (auparse->srcpad) {
388 gst_element_remove_pad (element, auparse->srcpad);
389 auparse->srcpad = NULL;
396 if (parent_class->change_state)
397 return parent_class->change_state (element, transition);
399 return GST_STATE_CHANGE_SUCCESS;
403 plugin_init (GstPlugin * plugin)
405 if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
413 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
416 "parses au streams", plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)