2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * Copyright (C) <2006> Tim-Philipp Müller <tim centricular net>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
22 * SECTION:element-auparse
23 * @short_description: .au file parser
39 #include "gstauparse.h"
40 #include <gst/audio/audio.h>
42 GST_DEBUG_CATEGORY_STATIC (auparse_debug);
43 #define GST_CAT_DEFAULT (auparse_debug)
45 static const GstElementDetails gst_au_parse_details =
46 GST_ELEMENT_DETAILS ("AU audio demuxer",
47 "Codec/Demuxer/Audio",
48 "Parse an .au file into raw audio",
49 "Erik Walthinsen <omega@cse.ogi.edu>");
51 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
54 GST_STATIC_CAPS ("audio/x-au")
57 #define GST_AU_PARSE_ALAW_PAD_TEMPLATE_CAPS \
59 "rate = (int) [ 8000, 192000 ], " \
60 "channels = (int) [ 1, 2 ]"
62 #define GST_AU_PARSE_MULAW_PAD_TEMPLATE_CAPS \
64 "rate = (int) [ 8000, 192000 ], " \
65 "channels = (int) [ 1, 2 ]"
67 /* Nothing to decode those ADPCM streams for now */
68 #define GST_AU_PARSE_ADPCM_PAD_TEMPLATE_CAPS \
70 "layout = (string) { g721, g722, g723_3, g723_5 }"
72 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
75 GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; "
76 GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS ";"
77 GST_AU_PARSE_ALAW_PAD_TEMPLATE_CAPS ";"
78 GST_AU_PARSE_MULAW_PAD_TEMPLATE_CAPS ";"
79 GST_AU_PARSE_ADPCM_PAD_TEMPLATE_CAPS));
82 static void gst_au_parse_dispose (GObject * object);
83 static GstFlowReturn gst_au_parse_chain (GstPad * pad, GstBuffer * buf);
84 static GstStateChangeReturn gst_au_parse_change_state (GstElement * element,
85 GstStateChange transition);
86 static void gst_au_parse_reset (GstAuParse * auparse);
87 static gboolean gst_au_parse_remove_srcpad (GstAuParse * auparse);
88 static gboolean gst_au_parse_add_srcpad (GstAuParse * auparse, GstCaps * caps);
89 static gboolean gst_au_parse_src_query (GstPad * pad, GstQuery * query);
90 static gboolean gst_au_parse_src_event (GstPad * pad, GstEvent * event);
91 static gboolean gst_au_parse_sink_event (GstPad * pad, GstEvent * event);
93 GST_BOILERPLATE (GstAuParse, gst_au_parse, GstElement, GST_TYPE_ELEMENT);
96 gst_au_parse_base_init (gpointer g_class)
98 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
100 gst_element_class_add_pad_template (element_class,
101 gst_static_pad_template_get (&sink_template));
102 gst_element_class_add_pad_template (element_class,
103 gst_static_pad_template_get (&src_template));
104 gst_element_class_set_details (element_class, &gst_au_parse_details);
106 GST_DEBUG_CATEGORY_INIT (auparse_debug, "auparse", 0, ".au parser");
110 gst_au_parse_class_init (GstAuParseClass * klass)
112 GObjectClass *gobject_class;
113 GstElementClass *gstelement_class;
115 gobject_class = (GObjectClass *) klass;
116 gstelement_class = (GstElementClass *) klass;
118 gobject_class->dispose = gst_au_parse_dispose;
120 gstelement_class->change_state =
121 GST_DEBUG_FUNCPTR (gst_au_parse_change_state);
125 gst_au_parse_init (GstAuParse * auparse, GstAuParseClass * klass)
127 auparse->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
128 gst_pad_set_chain_function (auparse->sinkpad,
129 GST_DEBUG_FUNCPTR (gst_au_parse_chain));
130 gst_pad_set_event_function (auparse->sinkpad,
131 GST_DEBUG_FUNCPTR (gst_au_parse_sink_event));
132 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
134 auparse->srcpad = NULL;
135 auparse->adapter = gst_adapter_new ();
136 gst_au_parse_reset (auparse);
140 gst_au_parse_dispose (GObject * object)
142 GstAuParse *au = GST_AU_PARSE (object);
144 if (au->adapter != NULL) {
145 g_object_unref (au->adapter);
148 G_OBJECT_CLASS (parent_class)->dispose (object);
152 gst_au_parse_reset (GstAuParse * auparse)
154 gst_au_parse_remove_srcpad (auparse);
157 auparse->buffer_offset = 0;
158 auparse->encoding = 0;
159 auparse->samplerate = 0;
160 auparse->channels = 0;
162 gst_adapter_clear (auparse->adapter);
164 /* gst_segment_init (&auparse->segment, GST_FORMAT_TIME); */
168 gst_au_parse_add_srcpad (GstAuParse * auparse, GstCaps * new_caps)
170 GstPad *srcpad = NULL;
172 if (auparse->src_caps && gst_caps_is_equal (new_caps, auparse->src_caps)) {
173 GST_LOG_OBJECT (auparse, "same caps, nothing to do");
177 gst_caps_replace (&auparse->src_caps, new_caps);
178 if (auparse->srcpad != NULL) {
179 GST_DEBUG_OBJECT (auparse, "Changing src pad caps to %" GST_PTR_FORMAT,
181 gst_pad_set_caps (auparse->srcpad, auparse->src_caps);
184 if (auparse->srcpad == NULL) {
185 srcpad = auparse->srcpad =
186 gst_pad_new_from_static_template (&src_template, "src");
187 g_return_val_if_fail (auparse->srcpad != NULL, FALSE);
190 gst_pad_set_query_type_function (auparse->srcpad,
191 GST_DEBUG_FUNCPTR (gst_au_parse_src_get_query_types));
193 gst_pad_set_query_function (auparse->srcpad,
194 GST_DEBUG_FUNCPTR (gst_au_parse_src_query));
195 gst_pad_set_event_function (auparse->srcpad,
196 GST_DEBUG_FUNCPTR (gst_au_parse_src_event));
198 gst_pad_use_fixed_caps (auparse->srcpad);
199 gst_pad_set_active (auparse->srcpad, TRUE);
201 if (auparse->src_caps)
202 gst_pad_set_caps (auparse->srcpad, auparse->src_caps);
204 GST_DEBUG_OBJECT (auparse, "Adding src pad with caps %" GST_PTR_FORMAT,
207 gst_object_ref (auparse->srcpad);
208 if (!gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad))
210 gst_element_no_more_pads (GST_ELEMENT (auparse));
217 gst_au_parse_remove_srcpad (GstAuParse * auparse)
221 if (auparse->srcpad != NULL) {
222 GST_DEBUG_OBJECT (auparse, "Removing src pad");
223 res = gst_element_remove_pad (GST_ELEMENT (auparse), auparse->srcpad);
224 g_return_val_if_fail (res != FALSE, FALSE);
225 gst_object_unref (auparse->srcpad);
226 auparse->srcpad = NULL;
233 gst_au_parse_parse_header (GstAuParse * auparse)
238 gchar layout[7] = { 0, };
239 gint law = 0, depth = 0, ieee = 0;
241 head = (guint8 *) gst_adapter_peek (auparse->adapter, 24);
242 g_assert (head != NULL);
244 GST_DEBUG_OBJECT (auparse, "[%c%c%c%c]", head[0], head[1], head[2], head[3]);
246 switch (GST_READ_UINT32_BE (head)) {
247 /* normal format is big endian (au is a Sparc format) */
248 case 0x2e736e64:{ /* ".snd" */
249 auparse->endianness = G_BIG_ENDIAN;
252 /* and of course, someone had to invent a little endian
253 * version. Used by DEC systems. */
254 case 0x646e732e: /* dns. */
255 case 0x0064732e:{ /* other source say it is "dns." */
256 auparse->endianness = G_LITTLE_ENDIAN;
264 auparse->offset = GST_READ_UINT32_BE (head + 4);
265 /* Do not trust size, could be set to -1 : unknown */
266 size = GST_READ_UINT32_BE (head + 8);
267 auparse->encoding = GST_READ_UINT32_BE (head + 12);
268 auparse->samplerate = GST_READ_UINT32_BE (head + 16);
269 auparse->channels = GST_READ_UINT32_BE (head + 20);
271 GST_DEBUG_OBJECT (auparse, "offset %" G_GINT64_FORMAT ", size %u, "
272 "encoding %u, frequency %u, channels %u", auparse->offset, size,
273 auparse->encoding, auparse->samplerate, auparse->channels);
276 * http://www.opengroup.org/public/pubs/external/auformat.html
277 * http://astronomy.swin.edu.au/~pbourke/dataformats/au/
278 * Solaris headers : /usr/include/audio/au.h
279 * libsndfile : src/au.c
282 * http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/AU/Samples.html
285 switch (auparse->encoding) {
286 case 1: /* 8-bit ISDN mu-law G.711 */
290 case 27: /* 8-bit ISDN A-law G.711 */
295 case 2: /* 8-bit linear PCM */
298 case 3: /* 16-bit linear PCM */
301 case 4: /* 24-bit linear PCM */
304 case 5: /* 32-bit linear PCM */
308 case 6: /* 32-bit IEEE floating point */
312 case 7: /* 64-bit IEEE floating point */
317 case 23: /* 4-bit CCITT G.721 ADPCM 32kbps -> modplug/libsndfile (compressed 8-bit mu-law) */
318 strcpy (layout, "g721");
320 case 24: /* 8-bit CCITT G.722 ADPCM -> rtp */
321 strcpy (layout, "g722");
323 case 25: /* 3-bit CCITT G.723.3 ADPCM 24kbps -> rtp/xine/modplug/libsndfile */
324 strcpy (layout, "g723_3");
326 case 26: /* 5-bit CCITT G.723.5 ADPCM 40kbps -> rtp/xine/modplug/libsndfile */
327 strcpy (layout, "g723_5");
330 case 8: /* Fragmented sample data */
331 case 9: /* AU_ENCODING_NESTED */
333 case 10: /* DSP program */
334 case 11: /* DSP 8-bit fixed point */
335 case 12: /* DSP 16-bit fixed point */
336 case 13: /* DSP 24-bit fixed point */
337 case 14: /* DSP 32-bit fixed point */
339 case 16: /* AU_ENCODING_DISPLAY : non-audio display data */
340 case 17: /* AU_ENCODING_MULAW_SQUELCH */
342 case 18: /* 16-bit linear with emphasis */
343 case 19: /* 16-bit linear compressed (NeXT) */
344 case 20: /* 16-bit linear with emphasis and compression */
346 case 21: /* Music kit DSP commands */
347 case 22: /* Music kit DSP commands samples */
355 gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
356 "rate", G_TYPE_INT, auparse->samplerate,
357 "channels", G_TYPE_INT, auparse->channels, NULL);
358 auparse->sample_size = auparse->channels;
360 tempcaps = gst_caps_new_simple ("audio/x-raw-float",
361 "rate", G_TYPE_INT, auparse->samplerate,
362 "channels", G_TYPE_INT, auparse->channels,
363 "endianness", G_TYPE_INT, auparse->endianness,
364 "width", G_TYPE_INT, depth, NULL);
365 auparse->sample_size = auparse->channels * depth / 8;
366 } else if (layout[0]) {
367 tempcaps = gst_caps_new_simple ("audio/x-adpcm",
368 "layout", G_TYPE_STRING, layout, NULL);
369 auparse->sample_size = 0;
371 tempcaps = gst_caps_new_simple ("audio/x-raw-int",
372 "rate", G_TYPE_INT, auparse->samplerate,
373 "channels", G_TYPE_INT, auparse->channels,
374 "endianness", G_TYPE_INT, auparse->endianness,
375 "depth", G_TYPE_INT, depth, "width", G_TYPE_INT, depth,
376 /* FIXME: signed TRUE even for 8-bit PCM? */
377 "signed", G_TYPE_BOOLEAN, TRUE, NULL);
378 auparse->sample_size = auparse->channels * depth / 8;
381 GST_DEBUG_OBJECT (auparse, "sample_size=%d", auparse->sample_size);
383 if (!gst_au_parse_add_srcpad (auparse, tempcaps))
386 GST_DEBUG_OBJECT (auparse, "offset=%" G_GINT64_FORMAT, auparse->offset);
387 gst_adapter_flush (auparse->adapter, auparse->offset);
389 gst_caps_unref (tempcaps);
395 GST_ELEMENT_ERROR (auparse, STREAM, WRONG_TYPE, (NULL), (NULL));
396 return GST_FLOW_ERROR;
400 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL), (NULL));
401 return GST_FLOW_ERROR;
405 GST_ELEMENT_ERROR (auparse, STREAM, FAILED, (NULL),
406 ("Failed to add srcpad"));
407 gst_caps_unref (tempcaps);
408 return GST_FLOW_ERROR;
412 #define AU_HEADER_SIZE 24
415 gst_au_parse_chain (GstPad * pad, GstBuffer * buf)
417 GstFlowReturn ret = GST_FLOW_OK;
419 gint avail, sendnow = 0;
421 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
423 GST_LOG_OBJECT (auparse, "got buffer of size %u", GST_BUFFER_SIZE (buf));
425 gst_adapter_push (auparse->adapter, buf);
428 /* if we haven't seen any data yet... */
429 if (auparse->srcpad == NULL) {
430 if (gst_adapter_available (auparse->adapter) < AU_HEADER_SIZE) {
431 GST_DEBUG_OBJECT (auparse, "need more data to parse header");
436 ret = gst_au_parse_parse_header (auparse);
437 if (ret != GST_FLOW_OK)
440 gst_pad_push_event (auparse->srcpad,
441 gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_DEFAULT,
442 0, GST_CLOCK_TIME_NONE, 0));
445 avail = gst_adapter_available (auparse->adapter);
447 if (auparse->sample_size > 0) {
448 /* Ensure we push a buffer that's a multiple of the frame size downstream */
449 sendnow = avail - (avail % auparse->sample_size);
451 /* It's something non-trivial (such as ADPCM), we don't understand it, so
452 * just push downstream and assume it will know what to do with it */
460 ret = gst_pad_alloc_buffer_and_set_caps (auparse->srcpad,
461 auparse->buffer_offset, sendnow, GST_PAD_CAPS (auparse->srcpad),
464 if (ret != GST_FLOW_OK) {
465 GST_DEBUG_OBJECT (auparse, "pad alloc flow: %s", gst_flow_get_name (ret));
469 data = gst_adapter_peek (auparse->adapter, sendnow);
470 memcpy (GST_BUFFER_DATA (outbuf), data, sendnow);
471 gst_adapter_flush (auparse->adapter, sendnow);
473 auparse->buffer_offset += sendnow;
475 ret = gst_pad_push (auparse->srcpad, outbuf);
480 gst_object_unref (auparse);
485 gst_au_parse_src_convert (GstAuParse * auparse, GstFormat src_format,
486 gint64 srcval, GstFormat dest_format, gint64 * destval)
490 guint samplesize, rate;
492 if (dest_format == src_format) {
497 GST_OBJECT_LOCK (auparse);
498 samplesize = auparse->sample_size;
499 offset = auparse->offset;
500 rate = auparse->samplerate;
501 GST_OBJECT_UNLOCK (auparse);
503 if (samplesize == 0 || rate == 0) {
504 GST_LOG_OBJECT (auparse, "cannot convert, sample_size or rate unknown");
508 switch (src_format) {
509 case GST_FORMAT_BYTES:
510 srcval /= samplesize;
512 case GST_FORMAT_DEFAULT:{
513 switch (dest_format) {
514 case GST_FORMAT_BYTES:
515 *destval = srcval * samplesize;
517 case GST_FORMAT_TIME:
518 *destval = gst_util_uint64_scale_int (srcval, GST_SECOND, rate);
526 case GST_FORMAT_TIME:{
527 switch (dest_format) {
528 case GST_FORMAT_BYTES:
530 gst_util_uint64_scale_int (srcval, rate * samplesize, GST_SECOND);
532 case GST_FORMAT_DEFAULT:
533 *destval = gst_util_uint64_scale_int (srcval, rate, GST_SECOND);
548 GST_DEBUG_OBJECT (auparse, "could not convert from %s to %s format",
549 gst_format_get_name (src_format), gst_format_get_name (dest_format));
556 gst_au_parse_src_query (GstPad * pad, GstQuery * query)
559 gboolean ret = FALSE;
561 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
563 switch (GST_QUERY_TYPE (query)) {
564 case GST_QUERY_DURATION:{
565 GstFormat bformat = GST_FORMAT_BYTES;
569 gst_query_parse_duration (query, &format, NULL);
570 if (!gst_pad_query_peer_duration (auparse->sinkpad, &bformat, &len)) {
571 GST_DEBUG_OBJECT (auparse, "failed to query upstream length");
574 GST_OBJECT_LOCK (auparse);
575 len -= auparse->offset;
576 GST_OBJECT_UNLOCK (auparse);
578 ret = gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, len,
582 gst_query_set_duration (query, format, val);
586 case GST_QUERY_POSITION:{
587 GstFormat bformat = GST_FORMAT_BYTES;
591 gst_query_parse_position (query, &format, NULL);
592 if (!gst_pad_query_peer_position (auparse->sinkpad, &bformat, &pos)) {
593 GST_DEBUG_OBJECT (auparse, "failed to query upstream position");
596 GST_OBJECT_LOCK (auparse);
597 pos -= auparse->offset;
598 GST_OBJECT_UNLOCK (auparse);
600 ret = gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, pos,
604 gst_query_set_position (query, format, val);
609 ret = gst_pad_query_default (pad, query);
613 gst_object_unref (auparse);
618 gst_au_parse_handle_seek (GstAuParse * auparse, GstEvent * event)
620 GstSeekType start_type, stop_type;
626 gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
629 if (format != GST_FORMAT_TIME) {
630 GST_DEBUG_OBJECT (auparse, "only support seeks in TIME format");
634 /* FIXME: implement seeking */
639 gst_au_parse_sink_event (GstPad * pad, GstEvent * event)
644 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
646 switch (GST_EVENT_TYPE (event)) {
648 ret = gst_pad_event_default (pad, event);
652 gst_object_unref (auparse);
657 gst_au_parse_src_event (GstPad * pad, GstEvent * event)
662 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
664 switch (GST_EVENT_TYPE (event)) {
666 ret = gst_au_parse_handle_seek (auparse, event);
669 ret = gst_pad_event_default (pad, event);
673 gst_object_unref (auparse);
677 static GstStateChangeReturn
678 gst_au_parse_change_state (GstElement * element, GstStateChange transition)
680 GstAuParse *auparse = GST_AU_PARSE (element);
681 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
683 ret = parent_class->change_state (element, transition);
684 if (ret == GST_STATE_CHANGE_FAILURE)
687 switch (transition) {
688 case GST_STATE_CHANGE_PAUSED_TO_READY:
689 gst_au_parse_reset (auparse);
698 plugin_init (GstPlugin * plugin)
700 if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
701 GST_TYPE_AU_PARSE)) {
708 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
711 "parses au streams", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,