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 GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
43 GST_STATIC_CAPS ("audio/x-au")
46 #define GST_AU_PARSE_ALAW_PAD_TEMPLATE_CAPS \
48 "rate = (int) [ 8000, 192000 ], " \
49 "channels = (int) [ 1, 2 ]"
51 #define GST_AU_PARSE_MULAW_PAD_TEMPLATE_CAPS \
53 "rate = (int) [ 8000, 192000 ], " \
54 "channels = (int) [ 1, 2 ]"
56 /* Nothing to decode those ADPCM streams for now */
57 #define GST_AU_PARSE_ADPCM_PAD_TEMPLATE_CAPS \
59 "layout = (string) { g721, g722, g723_3, g723_5 }"
61 static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
64 GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; "
65 GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS ";"
66 GST_AU_PARSE_ALAW_PAD_TEMPLATE_CAPS ";"
67 GST_AU_PARSE_MULAW_PAD_TEMPLATE_CAPS ";"
68 GST_AU_PARSE_ADPCM_PAD_TEMPLATE_CAPS));
71 static void gst_au_parse_dispose (GObject * object);
72 static GstFlowReturn gst_au_parse_chain (GstPad * pad, GstBuffer * buf);
73 static GstStateChangeReturn gst_au_parse_change_state (GstElement * element,
74 GstStateChange transition);
75 static void gst_au_parse_reset (GstAuParse * auparse);
76 static gboolean gst_au_parse_src_query (GstPad * pad, GstQuery * query);
77 static gboolean gst_au_parse_src_event (GstPad * pad, GstEvent * event);
78 static gboolean gst_au_parse_sink_event (GstPad * pad, GstEvent * event);
79 static gboolean gst_au_parse_src_convert (GstAuParse * auparse,
80 GstFormat src_format, gint64 srcval, GstFormat dest_format,
83 #define gst_au_parse_parent_class parent_class
84 G_DEFINE_TYPE (GstAuParse, gst_au_parse, GST_TYPE_ELEMENT);
87 gst_au_parse_class_init (GstAuParseClass * klass)
89 GObjectClass *gobject_class;
90 GstElementClass *gstelement_class;
92 GST_DEBUG_CATEGORY_INIT (auparse_debug, "auparse", 0, ".au parser");
94 gobject_class = (GObjectClass *) klass;
95 gstelement_class = (GstElementClass *) klass;
97 gobject_class->dispose = gst_au_parse_dispose;
99 gstelement_class->change_state =
100 GST_DEBUG_FUNCPTR (gst_au_parse_change_state);
101 gst_element_class_add_pad_template (gstelement_class,
102 gst_static_pad_template_get (&sink_template));
103 gst_element_class_add_pad_template (gstelement_class,
104 gst_static_pad_template_get (&src_template));
105 gst_element_class_set_details_simple (gstelement_class,
107 "Codec/Demuxer/Audio",
108 "Parse an .au file into raw audio",
109 "Erik Walthinsen <omega@cse.ogi.edu>");
113 gst_au_parse_init (GstAuParse * auparse)
115 auparse->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
116 gst_pad_set_chain_function (auparse->sinkpad,
117 GST_DEBUG_FUNCPTR (gst_au_parse_chain));
118 gst_pad_set_event_function (auparse->sinkpad,
119 GST_DEBUG_FUNCPTR (gst_au_parse_sink_event));
120 gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
122 auparse->srcpad = gst_pad_new_from_static_template (&src_template, "src");
123 gst_pad_set_query_function (auparse->srcpad,
124 GST_DEBUG_FUNCPTR (gst_au_parse_src_query));
125 gst_pad_set_event_function (auparse->srcpad,
126 GST_DEBUG_FUNCPTR (gst_au_parse_src_event));
127 gst_pad_use_fixed_caps (auparse->srcpad);
128 gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
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)
150 auparse->buffer_offset = 0;
151 auparse->encoding = 0;
152 auparse->samplerate = 0;
153 auparse->channels = 0;
155 gst_adapter_clear (auparse->adapter);
157 /* gst_segment_init (&auparse->segment, GST_FORMAT_TIME); */
161 gst_au_parse_negotiate_srcpad (GstAuParse * auparse, GstCaps * new_caps)
163 if (auparse->src_caps && gst_caps_is_equal (new_caps, auparse->src_caps)) {
164 GST_LOG_OBJECT (auparse, "same caps, nothing to do");
168 gst_caps_replace (&auparse->src_caps, new_caps);
169 GST_DEBUG_OBJECT (auparse, "Changing src pad caps to %" GST_PTR_FORMAT,
171 gst_pad_set_caps (auparse->srcpad, auparse->src_caps);
177 gst_au_parse_parse_header (GstAuParse * auparse)
182 gchar layout[7] = { 0, };
183 gint law = 0, depth = 0, ieee = 0;
185 head = (guint8 *) gst_adapter_map (auparse->adapter, 24);
186 g_assert (head != NULL);
188 GST_DEBUG_OBJECT (auparse, "[%c%c%c%c]", head[0], head[1], head[2], head[3]);
190 switch (GST_READ_UINT32_BE (head)) {
191 /* normal format is big endian (au is a Sparc format) */
192 case 0x2e736e64:{ /* ".snd" */
193 auparse->endianness = G_BIG_ENDIAN;
196 /* and of course, someone had to invent a little endian
197 * version. Used by DEC systems. */
198 case 0x646e732e: /* dns. */
199 case 0x0064732e:{ /* other source say it is "dns." */
200 auparse->endianness = G_LITTLE_ENDIAN;
208 auparse->offset = GST_READ_UINT32_BE (head + 4);
209 /* Do not trust size, could be set to -1 : unknown
210 * otherwise: filesize = size + auparse->offset
212 size = GST_READ_UINT32_BE (head + 8);
213 auparse->encoding = GST_READ_UINT32_BE (head + 12);
214 auparse->samplerate = GST_READ_UINT32_BE (head + 16);
215 auparse->channels = GST_READ_UINT32_BE (head + 20);
217 if (auparse->samplerate < 8000 || auparse->samplerate > 192000)
218 goto unsupported_sample_rate;
220 if (auparse->channels < 1 || auparse->channels > 2)
221 goto unsupported_number_of_channels;
223 GST_DEBUG_OBJECT (auparse, "offset %" G_GINT64_FORMAT ", size %u, "
224 "encoding %u, frequency %u, channels %u", auparse->offset, size,
225 auparse->encoding, auparse->samplerate, auparse->channels);
228 * http://www.opengroup.org/public/pubs/external/auformat.html
229 * http://astronomy.swin.edu.au/~pbourke/dataformats/au/
230 * Solaris headers : /usr/include/audio/au.h
231 * libsndfile : src/au.c
234 * http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/AU/Samples.html
237 switch (auparse->encoding) {
238 case 1: /* 8-bit ISDN mu-law G.711 */
242 case 27: /* 8-bit ISDN A-law G.711 */
247 case 2: /* 8-bit linear PCM */
250 case 3: /* 16-bit linear PCM */
253 case 4: /* 24-bit linear PCM */
256 case 5: /* 32-bit linear PCM */
260 case 6: /* 32-bit IEEE floating point */
264 case 7: /* 64-bit IEEE floating point */
269 case 23: /* 4-bit CCITT G.721 ADPCM 32kbps -> modplug/libsndfile (compressed 8-bit mu-law) */
270 strcpy (layout, "g721");
272 case 24: /* 8-bit CCITT G.722 ADPCM -> rtp */
273 strcpy (layout, "g722");
275 case 25: /* 3-bit CCITT G.723.3 ADPCM 24kbps -> rtp/xine/modplug/libsndfile */
276 strcpy (layout, "g723_3");
278 case 26: /* 5-bit CCITT G.723.5 ADPCM 40kbps -> rtp/xine/modplug/libsndfile */
279 strcpy (layout, "g723_5");
282 case 8: /* Fragmented sample data */
283 case 9: /* AU_ENCODING_NESTED */
285 case 10: /* DSP program */
286 case 11: /* DSP 8-bit fixed point */
287 case 12: /* DSP 16-bit fixed point */
288 case 13: /* DSP 24-bit fixed point */
289 case 14: /* DSP 32-bit fixed point */
291 case 16: /* AU_ENCODING_DISPLAY : non-audio display data */
292 case 17: /* AU_ENCODING_MULAW_SQUELCH */
294 case 18: /* 16-bit linear with emphasis */
295 case 19: /* 16-bit linear compressed (NeXT) */
296 case 20: /* 16-bit linear with emphasis and compression */
298 case 21: /* Music kit DSP commands */
299 case 22: /* Music kit DSP commands samples */
307 gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
308 "rate", G_TYPE_INT, auparse->samplerate,
309 "channels", G_TYPE_INT, auparse->channels, NULL);
310 auparse->sample_size = auparse->channels;
312 tempcaps = gst_caps_new_simple ("audio/x-raw-float",
313 "rate", G_TYPE_INT, auparse->samplerate,
314 "channels", G_TYPE_INT, auparse->channels,
315 "endianness", G_TYPE_INT, auparse->endianness,
316 "width", G_TYPE_INT, depth, NULL);
317 auparse->sample_size = auparse->channels * depth / 8;
318 } else if (layout[0]) {
319 tempcaps = gst_caps_new_simple ("audio/x-adpcm",
320 "layout", G_TYPE_STRING, layout, NULL);
321 auparse->sample_size = 0;
323 tempcaps = gst_caps_new_simple ("audio/x-raw-int",
324 "rate", G_TYPE_INT, auparse->samplerate,
325 "channels", G_TYPE_INT, auparse->channels,
326 "endianness", G_TYPE_INT, auparse->endianness,
327 "depth", G_TYPE_INT, depth, "width", G_TYPE_INT, depth,
328 /* FIXME: signed TRUE even for 8-bit PCM? */
329 "signed", G_TYPE_BOOLEAN, TRUE, NULL);
330 auparse->sample_size = auparse->channels * depth / 8;
333 GST_DEBUG_OBJECT (auparse, "sample_size=%d", auparse->sample_size);
335 gst_au_parse_negotiate_srcpad (auparse, tempcaps);
337 GST_DEBUG_OBJECT (auparse, "offset=%" G_GINT64_FORMAT, auparse->offset);
338 gst_adapter_unmap (auparse->adapter, auparse->offset);
340 gst_caps_unref (tempcaps);
346 gst_adapter_unmap (auparse->adapter, 0);
347 GST_ELEMENT_ERROR (auparse, STREAM, WRONG_TYPE, (NULL), (NULL));
348 return GST_FLOW_ERROR;
350 unsupported_sample_rate:
352 gst_adapter_unmap (auparse->adapter, 0);
353 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL),
354 ("Unsupported samplerate: %u", auparse->samplerate));
355 return GST_FLOW_ERROR;
357 unsupported_number_of_channels:
359 gst_adapter_unmap (auparse->adapter, 0);
360 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL),
361 ("Unsupported number of channels: %u", auparse->channels));
362 return GST_FLOW_ERROR;
366 gst_adapter_unmap (auparse->adapter, 0);
367 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL),
368 ("Unsupported encoding: %u", auparse->encoding));
369 return GST_FLOW_ERROR;
373 #define AU_HEADER_SIZE 24
376 gst_au_parse_chain (GstPad * pad, GstBuffer * buf)
378 GstFlowReturn ret = GST_FLOW_OK;
380 gint avail, sendnow = 0;
386 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
388 GST_LOG_OBJECT (auparse, "got buffer of size %u", gst_buffer_get_size (buf));
390 gst_adapter_push (auparse->adapter, buf);
393 /* if we haven't seen any data yet... */
394 if (!gst_pad_has_current_caps (auparse->srcpad)) {
395 if (gst_adapter_available (auparse->adapter) < AU_HEADER_SIZE) {
396 GST_DEBUG_OBJECT (auparse, "need more data to parse header");
401 ret = gst_au_parse_parse_header (auparse);
402 if (ret != GST_FLOW_OK)
405 gst_segment_init (&segment, GST_FORMAT_TIME);
406 gst_pad_push_event (auparse->srcpad, gst_event_new_segment (&segment));
409 avail = gst_adapter_available (auparse->adapter);
411 if (auparse->sample_size > 0) {
412 /* Ensure we push a buffer that's a multiple of the frame size downstream */
413 sendnow = avail - (avail % auparse->sample_size);
415 /* It's something non-trivial (such as ADPCM), we don't understand it, so
416 * just push downstream and assume it will know what to do with it */
424 outbuf = gst_adapter_take_buffer (auparse->adapter, sendnow);
425 outbuf = gst_buffer_make_writable (outbuf);
427 pos = auparse->buffer_offset - auparse->offset;
430 if (auparse->sample_size > 0 && auparse->samplerate > 0) {
431 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, pos,
432 GST_FORMAT_DEFAULT, &offset);
433 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, pos,
434 GST_FORMAT_TIME, ×tamp);
435 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES,
436 sendnow, GST_FORMAT_TIME, &duration);
438 GST_BUFFER_OFFSET (outbuf) = offset;
439 GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
440 GST_BUFFER_DURATION (outbuf) = duration;
443 auparse->buffer_offset += sendnow;
445 ret = gst_pad_push (auparse->srcpad, outbuf);
450 gst_object_unref (auparse);
455 gst_au_parse_src_convert (GstAuParse * auparse, GstFormat src_format,
456 gint64 srcval, GstFormat dest_format, gint64 * destval)
459 guint samplesize, rate;
461 if (dest_format == src_format) {
466 GST_OBJECT_LOCK (auparse);
467 samplesize = auparse->sample_size;
468 rate = auparse->samplerate;
469 GST_OBJECT_UNLOCK (auparse);
471 if (samplesize == 0 || rate == 0) {
472 GST_LOG_OBJECT (auparse, "cannot convert, sample_size or rate unknown");
476 switch (src_format) {
477 case GST_FORMAT_BYTES:
478 srcval /= samplesize;
480 case GST_FORMAT_DEFAULT:{
481 switch (dest_format) {
482 case GST_FORMAT_DEFAULT:
485 case GST_FORMAT_BYTES:
486 *destval = srcval * samplesize;
488 case GST_FORMAT_TIME:
489 *destval = gst_util_uint64_scale_int (srcval, GST_SECOND, rate);
497 case GST_FORMAT_TIME:{
498 switch (dest_format) {
499 case GST_FORMAT_BYTES:
500 *destval = samplesize *
501 gst_util_uint64_scale_int (srcval, rate, GST_SECOND);
503 case GST_FORMAT_DEFAULT:
504 *destval = gst_util_uint64_scale_int (srcval, rate, GST_SECOND);
519 GST_DEBUG_OBJECT (auparse, "could not convert from %s to %s format",
520 gst_format_get_name (src_format), gst_format_get_name (dest_format));
527 gst_au_parse_src_query (GstPad * pad, GstQuery * query)
530 gboolean ret = FALSE;
532 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
534 switch (GST_QUERY_TYPE (query)) {
535 case GST_QUERY_DURATION:{
539 gst_query_parse_duration (query, &format, NULL);
540 if (!gst_pad_query_peer_duration (auparse->sinkpad, GST_FORMAT_BYTES,
542 GST_DEBUG_OBJECT (auparse, "failed to query upstream length");
545 GST_OBJECT_LOCK (auparse);
546 len -= auparse->offset;
547 GST_OBJECT_UNLOCK (auparse);
550 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, len, format,
554 gst_query_set_duration (query, format, val);
558 case GST_QUERY_POSITION:{
562 gst_query_parse_position (query, &format, NULL);
563 if (!gst_pad_query_peer_position (auparse->sinkpad, GST_FORMAT_BYTES,
565 GST_DEBUG_OBJECT (auparse, "failed to query upstream position");
568 GST_OBJECT_LOCK (auparse);
569 pos -= auparse->offset;
570 GST_OBJECT_UNLOCK (auparse);
572 ret = gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, pos,
576 gst_query_set_position (query, format, val);
580 case GST_QUERY_SEEKING:{
583 gst_query_parse_seeking (query, &format, NULL, NULL, NULL);
584 /* FIXME: query duration in 'format'
585 gst_query_set_seeking (query, format, TRUE, 0, duration);
587 gst_query_set_seeking (query, format, TRUE, 0, GST_CLOCK_TIME_NONE);
592 ret = gst_pad_query_default (pad, query);
596 gst_object_unref (auparse);
601 gst_au_parse_handle_seek (GstAuParse * auparse, GstEvent * event)
603 GstSeekType start_type, stop_type;
610 gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
613 if (format != GST_FORMAT_TIME) {
614 GST_DEBUG_OBJECT (auparse, "only support seeks in TIME format");
618 res = gst_au_parse_src_convert (auparse, GST_FORMAT_TIME, start,
619 GST_FORMAT_BYTES, &start);
622 res = gst_au_parse_src_convert (auparse, GST_FORMAT_TIME, stop,
623 GST_FORMAT_BYTES, &stop);
626 GST_INFO_OBJECT (auparse,
627 "seeking: %" G_GINT64_FORMAT " ... %" G_GINT64_FORMAT, start, stop);
629 event = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags, start_type, start,
631 res = gst_pad_push_event (auparse->sinkpad, event);
636 gst_au_parse_sink_event (GstPad * pad, GstEvent * event)
641 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
643 switch (GST_EVENT_TYPE (event)) {
646 /* discard, we'll come up with proper src caps */
647 gst_event_unref (event);
650 case GST_EVENT_SEGMENT:
652 gint64 start, stop, offset = 0;
654 GstEvent *new_event = NULL;
656 /* some debug output */
657 gst_event_copy_segment (event, &segment);
658 GST_DEBUG_OBJECT (auparse, "received newsegment %" GST_SEGMENT_FORMAT,
661 start = segment.start;
663 if (auparse->sample_size > 0) {
666 start -= auparse->offset;
667 start = MAX (start, 0);
670 stop -= auparse->offset;
671 stop = MAX (stop, 0);
673 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, start,
674 GST_FORMAT_TIME, &start);
675 gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, stop,
676 GST_FORMAT_TIME, &stop);
679 GST_INFO_OBJECT (auparse,
680 "new segment: %" GST_TIME_FORMAT " ... %" GST_TIME_FORMAT,
681 GST_TIME_ARGS (start), GST_TIME_ARGS (stop));
683 gst_segment_init (&segment, GST_FORMAT_TIME);
684 segment.start = segment.time = start;
686 new_event = gst_event_new_segment (&segment);
688 ret = gst_pad_push_event (auparse->srcpad, new_event);
690 auparse->buffer_offset = offset;
692 gst_event_unref (event);
696 if (!auparse->srcpad) {
697 GST_ELEMENT_ERROR (auparse, STREAM, WRONG_TYPE,
698 ("No valid input found before end of stream"), (NULL));
702 ret = gst_pad_event_default (pad, event);
706 gst_object_unref (auparse);
711 gst_au_parse_src_event (GstPad * pad, GstEvent * event)
716 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
718 switch (GST_EVENT_TYPE (event)) {
720 ret = gst_au_parse_handle_seek (auparse, event);
723 ret = gst_pad_event_default (pad, event);
727 gst_object_unref (auparse);
731 static GstStateChangeReturn
732 gst_au_parse_change_state (GstElement * element, GstStateChange transition)
734 GstAuParse *auparse = GST_AU_PARSE (element);
735 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
737 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
738 if (ret == GST_STATE_CHANGE_FAILURE)
741 switch (transition) {
742 case GST_STATE_CHANGE_PAUSED_TO_READY:
743 gst_au_parse_reset (auparse);
752 plugin_init (GstPlugin * plugin)
754 if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
755 GST_TYPE_AU_PARSE)) {
762 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
765 "parses au streams", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,