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
24 * Parses .au files mostly originating from sun os based computers.
34 #include "gstauparse.h"
35 #include <gst/audio/audio.h>
37 GST_DEBUG_CATEGORY_STATIC (auparse_debug);
38 #define GST_CAT_DEFAULT (auparse_debug)
40 static const GstElementDetails gst_au_parse_details =
41 GST_ELEMENT_DETAILS ("AU audio demuxer",
42 "Codec/Demuxer/Audio",
43 "Parse an .au file into raw audio",
44 "Erik Walthinsen <omega@cse.ogi.edu>");
46 static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
49 GST_STATIC_CAPS ("audio/x-au")
52 #define GST_AU_PARSE_ALAW_PAD_TEMPLATE_CAPS \
54 "rate = (int) [ 8000, 192000 ], " \
55 "channels = (int) [ 1, 2 ]"
57 #define GST_AU_PARSE_MULAW_PAD_TEMPLATE_CAPS \
59 "rate = (int) [ 8000, 192000 ], " \
60 "channels = (int) [ 1, 2 ]"
62 /* Nothing to decode those ADPCM streams for now */
63 #define GST_AU_PARSE_ADPCM_PAD_TEMPLATE_CAPS \
65 "layout = (string) { g721, g722, g723_3, g723_5 }"
67 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
70 GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; "
71 GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS ";"
72 GST_AU_PARSE_ALAW_PAD_TEMPLATE_CAPS ";"
73 GST_AU_PARSE_MULAW_PAD_TEMPLATE_CAPS ";"
74 GST_AU_PARSE_ADPCM_PAD_TEMPLATE_CAPS));
77 static void gst_au_parse_dispose (GObject * object);
78 static GstFlowReturn gst_au_parse_chain (GstPad * pad, GstBuffer * buf);
79 static GstStateChangeReturn gst_au_parse_change_state (GstElement * element,
80 GstStateChange transition);
81 static void gst_au_parse_reset (GstAuParse * auparse);
82 static gboolean gst_au_parse_remove_srcpad (GstAuParse * auparse);
83 static gboolean gst_au_parse_add_srcpad (GstAuParse * auparse, GstCaps * caps);
84 static gboolean gst_au_parse_src_query (GstPad * pad, GstQuery * query);
85 static gboolean gst_au_parse_src_event (GstPad * pad, GstEvent * event);
86 static gboolean gst_au_parse_sink_event (GstPad * pad, GstEvent * event);
88 GST_BOILERPLATE (GstAuParse, gst_au_parse, GstElement, GST_TYPE_ELEMENT);
91 gst_au_parse_base_init (gpointer g_class)
93 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
95 gst_element_class_add_pad_template (element_class,
96 gst_static_pad_template_get (&sink_template));
97 gst_element_class_add_pad_template (element_class,
98 gst_static_pad_template_get (&src_template));
99 gst_element_class_set_details (element_class, &gst_au_parse_details);
101 GST_DEBUG_CATEGORY_INIT (auparse_debug, "auparse", 0, ".au parser");
105 gst_au_parse_class_init (GstAuParseClass * klass)
107 GObjectClass *gobject_class;
108 GstElementClass *gstelement_class;
110 gobject_class = (GObjectClass *) klass;
111 gstelement_class = (GstElementClass *) klass;
113 gobject_class->dispose = gst_au_parse_dispose;
115 gstelement_class->change_state =
116 GST_DEBUG_FUNCPTR (gst_au_parse_change_state);
120 gst_au_parse_init (GstAuParse * auparse, GstAuParseClass * klass)
122 auparse->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
123 gst_pad_set_chain_function (auparse->sinkpad,
124 GST_DEBUG_FUNCPTR (gst_au_parse_chain));
125 gst_pad_set_event_function (auparse->sinkpad,
126 GST_DEBUG_FUNCPTR (gst_au_parse_sink_event));
127 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
129 auparse->srcpad = NULL;
130 auparse->adapter = gst_adapter_new ();
131 gst_au_parse_reset (auparse);
135 gst_au_parse_dispose (GObject * object)
137 GstAuParse *au = GST_AU_PARSE (object);
139 if (au->adapter != NULL) {
140 g_object_unref (au->adapter);
143 G_OBJECT_CLASS (parent_class)->dispose (object);
147 gst_au_parse_reset (GstAuParse * auparse)
149 gst_au_parse_remove_srcpad (auparse);
152 auparse->buffer_offset = 0;
153 auparse->encoding = 0;
154 auparse->samplerate = 0;
155 auparse->channels = 0;
157 gst_adapter_clear (auparse->adapter);
159 /* gst_segment_init (&auparse->segment, GST_FORMAT_TIME); */
163 gst_au_parse_add_srcpad (GstAuParse * auparse, GstCaps * new_caps)
165 GstPad *srcpad = NULL;
167 if (auparse->src_caps && gst_caps_is_equal (new_caps, auparse->src_caps)) {
168 GST_LOG_OBJECT (auparse, "same caps, nothing to do");
172 gst_caps_replace (&auparse->src_caps, new_caps);
173 if (auparse->srcpad != NULL) {
174 GST_DEBUG_OBJECT (auparse, "Changing src pad caps to %" GST_PTR_FORMAT,
176 gst_pad_set_caps (auparse->srcpad, auparse->src_caps);
179 if (auparse->srcpad == NULL) {
180 srcpad = auparse->srcpad =
181 gst_pad_new_from_static_template (&src_template, "src");
182 g_return_val_if_fail (auparse->srcpad != NULL, FALSE);
185 gst_pad_set_query_type_function (auparse->srcpad,
186 GST_DEBUG_FUNCPTR (gst_au_parse_src_get_query_types));
188 gst_pad_set_query_function (auparse->srcpad,
189 GST_DEBUG_FUNCPTR (gst_au_parse_src_query));
190 gst_pad_set_event_function (auparse->srcpad,
191 GST_DEBUG_FUNCPTR (gst_au_parse_src_event));
193 gst_pad_use_fixed_caps (auparse->srcpad);
194 gst_pad_set_active (auparse->srcpad, TRUE);
196 if (auparse->src_caps)
197 gst_pad_set_caps (auparse->srcpad, auparse->src_caps);
199 GST_DEBUG_OBJECT (auparse, "Adding src pad with caps %" GST_PTR_FORMAT,
202 gst_object_ref (auparse->srcpad);
203 if (!gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad))
205 gst_element_no_more_pads (GST_ELEMENT (auparse));
212 gst_au_parse_remove_srcpad (GstAuParse * auparse)
216 if (auparse->srcpad != NULL) {
217 GST_DEBUG_OBJECT (auparse, "Removing src pad");
218 res = gst_element_remove_pad (GST_ELEMENT (auparse), auparse->srcpad);
219 g_return_val_if_fail (res != FALSE, FALSE);
220 gst_object_unref (auparse->srcpad);
221 auparse->srcpad = NULL;
228 gst_au_parse_parse_header (GstAuParse * auparse)
233 gchar layout[7] = { 0, };
234 gint law = 0, depth = 0, ieee = 0;
236 head = (guint8 *) gst_adapter_peek (auparse->adapter, 24);
237 g_assert (head != NULL);
239 GST_DEBUG_OBJECT (auparse, "[%c%c%c%c]", head[0], head[1], head[2], head[3]);
241 switch (GST_READ_UINT32_BE (head)) {
242 /* normal format is big endian (au is a Sparc format) */
243 case 0x2e736e64:{ /* ".snd" */
244 auparse->endianness = G_BIG_ENDIAN;
247 /* and of course, someone had to invent a little endian
248 * version. Used by DEC systems. */
249 case 0x646e732e: /* dns. */
250 case 0x0064732e:{ /* other source say it is "dns." */
251 auparse->endianness = G_LITTLE_ENDIAN;
259 auparse->offset = GST_READ_UINT32_BE (head + 4);
260 /* Do not trust size, could be set to -1 : unknown */
261 size = GST_READ_UINT32_BE (head + 8);
262 auparse->encoding = GST_READ_UINT32_BE (head + 12);
263 auparse->samplerate = GST_READ_UINT32_BE (head + 16);
264 auparse->channels = GST_READ_UINT32_BE (head + 20);
266 if (auparse->samplerate < 8000 || auparse->samplerate > 192000)
267 goto unsupported_sample_rate;
269 if (auparse->channels < 1 || auparse->channels > 2)
270 goto unsupported_number_of_channels;
272 GST_DEBUG_OBJECT (auparse, "offset %" G_GINT64_FORMAT ", size %u, "
273 "encoding %u, frequency %u, channels %u", auparse->offset, size,
274 auparse->encoding, auparse->samplerate, auparse->channels);
277 * http://www.opengroup.org/public/pubs/external/auformat.html
278 * http://astronomy.swin.edu.au/~pbourke/dataformats/au/
279 * Solaris headers : /usr/include/audio/au.h
280 * libsndfile : src/au.c
283 * http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/AU/Samples.html
286 switch (auparse->encoding) {
287 case 1: /* 8-bit ISDN mu-law G.711 */
291 case 27: /* 8-bit ISDN A-law G.711 */
296 case 2: /* 8-bit linear PCM */
299 case 3: /* 16-bit linear PCM */
302 case 4: /* 24-bit linear PCM */
305 case 5: /* 32-bit linear PCM */
309 case 6: /* 32-bit IEEE floating point */
313 case 7: /* 64-bit IEEE floating point */
318 case 23: /* 4-bit CCITT G.721 ADPCM 32kbps -> modplug/libsndfile (compressed 8-bit mu-law) */
319 strcpy (layout, "g721");
321 case 24: /* 8-bit CCITT G.722 ADPCM -> rtp */
322 strcpy (layout, "g722");
324 case 25: /* 3-bit CCITT G.723.3 ADPCM 24kbps -> rtp/xine/modplug/libsndfile */
325 strcpy (layout, "g723_3");
327 case 26: /* 5-bit CCITT G.723.5 ADPCM 40kbps -> rtp/xine/modplug/libsndfile */
328 strcpy (layout, "g723_5");
331 case 8: /* Fragmented sample data */
332 case 9: /* AU_ENCODING_NESTED */
334 case 10: /* DSP program */
335 case 11: /* DSP 8-bit fixed point */
336 case 12: /* DSP 16-bit fixed point */
337 case 13: /* DSP 24-bit fixed point */
338 case 14: /* DSP 32-bit fixed point */
340 case 16: /* AU_ENCODING_DISPLAY : non-audio display data */
341 case 17: /* AU_ENCODING_MULAW_SQUELCH */
343 case 18: /* 16-bit linear with emphasis */
344 case 19: /* 16-bit linear compressed (NeXT) */
345 case 20: /* 16-bit linear with emphasis and compression */
347 case 21: /* Music kit DSP commands */
348 case 22: /* Music kit DSP commands samples */
356 gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
357 "rate", G_TYPE_INT, auparse->samplerate,
358 "channels", G_TYPE_INT, auparse->channels, NULL);
359 auparse->sample_size = auparse->channels;
361 tempcaps = gst_caps_new_simple ("audio/x-raw-float",
362 "rate", G_TYPE_INT, auparse->samplerate,
363 "channels", G_TYPE_INT, auparse->channels,
364 "endianness", G_TYPE_INT, auparse->endianness,
365 "width", G_TYPE_INT, depth, NULL);
366 auparse->sample_size = auparse->channels * depth / 8;
367 } else if (layout[0]) {
368 tempcaps = gst_caps_new_simple ("audio/x-adpcm",
369 "layout", G_TYPE_STRING, layout, NULL);
370 auparse->sample_size = 0;
372 tempcaps = gst_caps_new_simple ("audio/x-raw-int",
373 "rate", G_TYPE_INT, auparse->samplerate,
374 "channels", G_TYPE_INT, auparse->channels,
375 "endianness", G_TYPE_INT, auparse->endianness,
376 "depth", G_TYPE_INT, depth, "width", G_TYPE_INT, depth,
377 /* FIXME: signed TRUE even for 8-bit PCM? */
378 "signed", G_TYPE_BOOLEAN, TRUE, NULL);
379 auparse->sample_size = auparse->channels * depth / 8;
382 GST_DEBUG_OBJECT (auparse, "sample_size=%d", auparse->sample_size);
384 if (!gst_au_parse_add_srcpad (auparse, tempcaps))
387 GST_DEBUG_OBJECT (auparse, "offset=%" G_GINT64_FORMAT, auparse->offset);
388 gst_adapter_flush (auparse->adapter, auparse->offset);
390 gst_caps_unref (tempcaps);
396 GST_ELEMENT_ERROR (auparse, STREAM, WRONG_TYPE, (NULL), (NULL));
397 return GST_FLOW_ERROR;
399 unsupported_sample_rate:
401 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL),
402 ("Unsupported samplerate: %u", auparse->samplerate));
403 return GST_FLOW_ERROR;
405 unsupported_number_of_channels:
407 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL),
408 ("Unsupported number of channels: %u", auparse->channels));
409 return GST_FLOW_ERROR;
413 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL),
414 ("Unsupported encoding: %u", auparse->encoding));
415 return GST_FLOW_ERROR;
419 GST_ELEMENT_ERROR (auparse, STREAM, FAILED, (NULL),
420 ("Failed to add srcpad"));
421 gst_caps_unref (tempcaps);
422 return GST_FLOW_ERROR;
426 #define AU_HEADER_SIZE 24
429 gst_au_parse_chain (GstPad * pad, GstBuffer * buf)
431 GstFlowReturn ret = GST_FLOW_OK;
433 gint avail, sendnow = 0;
435 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
437 GST_LOG_OBJECT (auparse, "got buffer of size %u", GST_BUFFER_SIZE (buf));
439 gst_adapter_push (auparse->adapter, buf);
442 /* if we haven't seen any data yet... */
443 if (auparse->srcpad == NULL) {
444 if (gst_adapter_available (auparse->adapter) < AU_HEADER_SIZE) {
445 GST_DEBUG_OBJECT (auparse, "need more data to parse header");
450 ret = gst_au_parse_parse_header (auparse);
451 if (ret != GST_FLOW_OK)
454 gst_pad_push_event (auparse->srcpad,
455 gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_DEFAULT,
456 0, GST_CLOCK_TIME_NONE, 0));
459 avail = gst_adapter_available (auparse->adapter);
461 if (auparse->sample_size > 0) {
462 /* Ensure we push a buffer that's a multiple of the frame size downstream */
463 sendnow = avail - (avail % auparse->sample_size);
465 /* It's something non-trivial (such as ADPCM), we don't understand it, so
466 * just push downstream and assume it will know what to do with it */
474 ret = gst_pad_alloc_buffer_and_set_caps (auparse->srcpad,
475 auparse->buffer_offset, sendnow, GST_PAD_CAPS (auparse->srcpad),
478 if (ret != GST_FLOW_OK) {
479 GST_DEBUG_OBJECT (auparse, "pad alloc flow: %s", gst_flow_get_name (ret));
483 data = gst_adapter_peek (auparse->adapter, sendnow);
484 memcpy (GST_BUFFER_DATA (outbuf), data, sendnow);
485 gst_adapter_flush (auparse->adapter, sendnow);
487 auparse->buffer_offset += sendnow;
489 ret = gst_pad_push (auparse->srcpad, outbuf);
494 gst_object_unref (auparse);
499 gst_au_parse_src_convert (GstAuParse * auparse, GstFormat src_format,
500 gint64 srcval, GstFormat dest_format, gint64 * destval)
504 guint samplesize, rate;
506 if (dest_format == src_format) {
511 GST_OBJECT_LOCK (auparse);
512 samplesize = auparse->sample_size;
513 offset = auparse->offset;
514 rate = auparse->samplerate;
515 GST_OBJECT_UNLOCK (auparse);
517 if (samplesize == 0 || rate == 0) {
518 GST_LOG_OBJECT (auparse, "cannot convert, sample_size or rate unknown");
522 switch (src_format) {
523 case GST_FORMAT_BYTES:
524 srcval /= samplesize;
526 case GST_FORMAT_DEFAULT:{
527 switch (dest_format) {
528 case GST_FORMAT_BYTES:
529 *destval = srcval * samplesize;
531 case GST_FORMAT_TIME:
532 *destval = gst_util_uint64_scale_int (srcval, GST_SECOND, rate);
540 case GST_FORMAT_TIME:{
541 switch (dest_format) {
542 case GST_FORMAT_BYTES:
544 gst_util_uint64_scale_int (srcval, rate * samplesize, GST_SECOND);
546 case GST_FORMAT_DEFAULT:
547 *destval = gst_util_uint64_scale_int (srcval, rate, GST_SECOND);
562 GST_DEBUG_OBJECT (auparse, "could not convert from %s to %s format",
563 gst_format_get_name (src_format), gst_format_get_name (dest_format));
570 gst_au_parse_src_query (GstPad * pad, GstQuery * query)
573 gboolean ret = FALSE;
575 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
577 switch (GST_QUERY_TYPE (query)) {
578 case GST_QUERY_DURATION:{
579 GstFormat bformat = GST_FORMAT_BYTES;
583 gst_query_parse_duration (query, &format, NULL);
584 if (!gst_pad_query_peer_duration (auparse->sinkpad, &bformat, &len)) {
585 GST_DEBUG_OBJECT (auparse, "failed to query upstream length");
588 GST_OBJECT_LOCK (auparse);
589 len -= auparse->offset;
590 GST_OBJECT_UNLOCK (auparse);
592 ret = gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, len,
596 gst_query_set_duration (query, format, val);
600 case GST_QUERY_POSITION:{
601 GstFormat bformat = GST_FORMAT_BYTES;
605 gst_query_parse_position (query, &format, NULL);
606 if (!gst_pad_query_peer_position (auparse->sinkpad, &bformat, &pos)) {
607 GST_DEBUG_OBJECT (auparse, "failed to query upstream position");
610 GST_OBJECT_LOCK (auparse);
611 pos -= auparse->offset;
612 GST_OBJECT_UNLOCK (auparse);
614 ret = gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, pos,
618 gst_query_set_position (query, format, val);
623 ret = gst_pad_query_default (pad, query);
627 gst_object_unref (auparse);
632 gst_au_parse_handle_seek (GstAuParse * auparse, GstEvent * event)
634 GstSeekType start_type, stop_type;
640 gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
643 if (format != GST_FORMAT_TIME) {
644 GST_DEBUG_OBJECT (auparse, "only support seeks in TIME format");
648 /* FIXME: implement seeking */
653 gst_au_parse_sink_event (GstPad * pad, GstEvent * event)
658 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
660 switch (GST_EVENT_TYPE (event)) {
662 ret = gst_pad_event_default (pad, event);
666 gst_object_unref (auparse);
671 gst_au_parse_src_event (GstPad * pad, GstEvent * event)
676 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
678 switch (GST_EVENT_TYPE (event)) {
680 ret = gst_au_parse_handle_seek (auparse, event);
683 ret = gst_pad_event_default (pad, event);
687 gst_object_unref (auparse);
691 static GstStateChangeReturn
692 gst_au_parse_change_state (GstElement * element, GstStateChange transition)
694 GstAuParse *auparse = GST_AU_PARSE (element);
695 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
697 ret = parent_class->change_state (element, transition);
698 if (ret == GST_STATE_CHANGE_FAILURE)
701 switch (transition) {
702 case GST_STATE_CHANGE_PAUSED_TO_READY:
703 gst_au_parse_reset (auparse);
712 plugin_init (GstPlugin * plugin)
714 if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
715 GST_TYPE_AU_PARSE)) {
722 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
725 "parses au streams", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,