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 GstElementStateReturn gst_auparse_change_state (GstElement * element);
91 static GstElementClass *parent_class = NULL;
93 /*static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; */
96 gst_auparse_get_type (void)
98 static GType auparse_type = 0;
101 static const GTypeInfo auparse_info = {
102 sizeof (GstAuParseClass),
103 gst_auparse_base_init,
105 (GClassInitFunc) gst_auparse_class_init,
110 (GInstanceInitFunc) gst_auparse_init,
114 g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info,
121 gst_auparse_base_init (gpointer g_class)
123 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
125 gst_element_class_add_pad_template (element_class,
126 gst_static_pad_template_get (&gst_auparse_sink_template));
127 gst_element_class_add_pad_template (element_class,
128 gst_static_pad_template_get (&gst_auparse_src_template));
129 gst_element_class_set_details (element_class, &gst_auparse_details);
134 gst_auparse_class_init (GstAuParseClass * klass)
136 GstElementClass *gstelement_class;
138 gstelement_class = (GstElementClass *) klass;
140 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
142 gstelement_class->change_state = gst_auparse_change_state;
146 gst_auparse_init (GstAuParse * auparse)
149 gst_pad_new_from_template (gst_static_pad_template_get
150 (&gst_auparse_sink_template), "sink");
151 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
152 gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);
154 auparse->srcpad = NULL;
155 #if 0 /* FIXME: spider */
156 gst_pad_new_from_template (gst_static_pad_template_get
157 (&gst_auparse_src_template), "src");
158 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
159 gst_pad_use_explicit_caps (auparse->srcpad);
164 auparse->encoding = 0;
165 auparse->frequency = 0;
166 auparse->channels = 0;
170 gst_auparse_chain (GstPad * pad, GstData * _data)
172 GstBuffer *buf = GST_BUFFER (_data);
177 gint law = 0, depth = 0, ieee = 0;
182 g_return_if_fail (pad != NULL);
183 g_return_if_fail (GST_IS_PAD (pad));
184 g_return_if_fail (buf != NULL);
186 auparse = GST_AUPARSE (gst_pad_get_parent (pad));
188 GST_DEBUG ("gst_auparse_chain: got buffer in '%s'",
189 gst_element_get_name (GST_ELEMENT (auparse)));
191 data = GST_BUFFER_DATA (buf);
192 size = GST_BUFFER_SIZE (buf);
194 /* if we haven't seen any data yet... */
195 if (auparse->size == 0) {
197 guint32 *head = (guint32 *) data;
199 /* normal format is big endian (au is a Sparc format) */
200 if (GST_READ_UINT32_BE (head) == 0x2e736e64) { /* ".snd" */
203 auparse->offset = GST_READ_UINT32_BE (head);
205 /* Do not trust size, could be set to -1 : unknown */
206 auparse->size = GST_READ_UINT32_BE (head);
208 auparse->encoding = GST_READ_UINT32_BE (head);
210 auparse->frequency = GST_READ_UINT32_BE (head);
212 auparse->channels = GST_READ_UINT32_BE (head);
215 /* and of course, someone had to invent a little endian
216 * version. Used by DEC systems. */
217 } else if (GST_READ_UINT32_LE (head) == 0x0064732E) { /* other source say it is "dns." */
220 auparse->offset = GST_READ_UINT32_LE (head);
222 /* Do not trust size, could be set to -1 : unknown */
223 auparse->size = GST_READ_UINT32_LE (head);
225 auparse->encoding = GST_READ_UINT32_LE (head);
227 auparse->frequency = GST_READ_UINT32_LE (head);
229 auparse->channels = GST_READ_UINT32_LE (head);
233 GST_ELEMENT_ERROR (auparse, STREAM, WRONG_TYPE, (NULL), (NULL));
234 gst_buffer_unref (buf);
239 ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
240 auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
245 http://www.opengroup.org/public/pubs/external/auformat.html
246 http://astronomy.swin.edu.au/~pbourke/dataformats/au/
247 Solaris headers : /usr/include/audio/au.h
248 libsndfile : src/au.c
250 http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/AU/Samples.html
253 switch (auparse->encoding) {
255 case 1: /* 8-bit ISDN mu-law G.711 */
259 case 27: /* 8-bit ISDN A-law G.711 */
264 case 2: /* 8-bit linear PCM */
267 case 3: /* 16-bit linear PCM */
270 case 4: /* 24-bit linear PCM */
273 case 5: /* 32-bit linear PCM */
277 case 6: /* 32-bit IEEE floating point */
281 case 7: /* 64-bit IEEE floating point */
286 case 23: /* 4-bit CCITT G.721 ADPCM 32kbps -> modplug/libsndfile (compressed 8-bit mu-law) */
287 strcpy (layout, "g721");
289 case 24: /* 8-bit CCITT G.722 ADPCM -> rtp */
290 strcpy (layout, "g722");
292 case 25: /* 3-bit CCITT G.723.3 ADPCM 24kbps -> rtp/xine/modplug/libsndfile */
293 strcpy (layout, "g723_3");
295 case 26: /* 5-bit CCITT G.723.5 ADPCM 40kbps -> rtp/xine/modplug/libsndfile */
296 strcpy (layout, "g723_5");
299 case 8: /* Fragmented sample data */
300 case 9: /* AU_ENCODING_NESTED */
302 case 10: /* DSP program */
303 case 11: /* DSP 8-bit fixed point */
304 case 12: /* DSP 16-bit fixed point */
305 case 13: /* DSP 24-bit fixed point */
306 case 14: /* DSP 32-bit fixed point */
308 case 16: /* AU_ENCODING_DISPLAY : non-audio display data */
309 case 17: /* AU_ENCODING_MULAW_SQUELCH */
311 case 18: /* 16-bit linear with emphasis */
312 case 19: /* 16-bit linear compressed (NeXT) */
313 case 20: /* 16-bit linear with emphasis and compression */
315 case 21: /* Music kit DSP commands */
316 case 22: /* Music kit DSP commands samples */
319 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL), (NULL));
320 gst_buffer_unref (buf);
325 gst_pad_new_from_template (gst_static_pad_template_get
326 (&gst_auparse_src_template), "src");
327 gst_pad_use_explicit_caps (auparse->srcpad);
331 gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
332 "rate", G_TYPE_INT, auparse->frequency,
333 "channels", G_TYPE_INT, auparse->channels, NULL);
335 tempcaps = gst_caps_new_simple ("audio/x-raw-float",
336 "rate", G_TYPE_INT, auparse->frequency,
337 "channels", G_TYPE_INT, auparse->channels,
338 "endianness", G_TYPE_INT,
339 auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, "width", G_TYPE_INT,
340 depth, "buffer-frames", G_TYPE_INT, 0, NULL);
341 } else if (layout[0]) {
342 tempcaps = gst_caps_new_simple ("audio/x-adpcm",
343 "layout", G_TYPE_STRING, layout, NULL);
345 tempcaps = gst_caps_new_simple ("audio/x-raw-int",
346 "rate", G_TYPE_INT, auparse->frequency,
347 "channels", G_TYPE_INT, auparse->channels,
348 "endianness", G_TYPE_INT,
349 auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, "depth", G_TYPE_INT,
350 depth, "width", G_TYPE_INT, depth, "signed", G_TYPE_BOOLEAN, TRUE,
354 if (!gst_pad_set_explicit_caps (auparse->srcpad, tempcaps)) {
355 GST_ELEMENT_ERROR (auparse, CORE, NEGOTIATION, (NULL), (NULL));
356 gst_buffer_unref (buf);
357 gst_object_unref (GST_OBJECT (auparse->srcpad));
358 auparse->srcpad = NULL;
362 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
364 newbuf = gst_buffer_new ();
365 GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size - (auparse->offset));
366 memcpy (GST_BUFFER_DATA (newbuf), data + (auparse->offset),
367 size - (auparse->offset));
368 GST_BUFFER_SIZE (newbuf) = size - (auparse->offset);
370 gst_buffer_unref (buf);
372 gst_pad_push (auparse->srcpad, GST_DATA (newbuf));
376 gst_pad_push (auparse->srcpad, GST_DATA (buf));
379 static GstElementStateReturn
380 gst_auparse_change_state (GstElement * element)
382 GstAuParse *auparse = GST_AUPARSE (element);
384 switch (GST_STATE_TRANSITION (element)) {
385 case GST_STATE_PAUSED_TO_READY:
386 if (auparse->srcpad) {
387 gst_element_remove_pad (element, auparse->srcpad);
388 auparse->srcpad = NULL;
395 if (parent_class->change_state)
396 return parent_class->change_state (element);
398 return GST_STATE_SUCCESS;
402 plugin_init (GstPlugin * plugin)
404 if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
412 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
415 "parses au streams", plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)