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;
161 auparse->float_swap = 0;
163 gst_adapter_clear (auparse->adapter);
165 /* gst_segment_init (&auparse->segment, GST_FORMAT_TIME); */
169 gst_au_parse_add_srcpad (GstAuParse * auparse, GstCaps * new_caps)
171 GstPad *srcpad = NULL;
173 if (auparse->src_caps && gst_caps_is_equal (new_caps, auparse->src_caps)) {
174 GST_LOG_OBJECT (auparse, "same caps, nothing to do");
178 gst_caps_replace (&auparse->src_caps, new_caps);
179 if (auparse->srcpad != NULL) {
180 GST_DEBUG_OBJECT (auparse, "Changing src pad caps to %" GST_PTR_FORMAT,
182 gst_pad_set_caps (auparse->srcpad, auparse->src_caps);
185 if (auparse->srcpad == NULL) {
186 srcpad = auparse->srcpad =
187 gst_pad_new_from_static_template (&src_template, "src");
188 g_return_val_if_fail (auparse->srcpad != NULL, FALSE);
191 gst_pad_set_query_type_function (auparse->srcpad,
192 GST_DEBUG_FUNCPTR (gst_au_parse_src_get_query_types));
194 gst_pad_set_query_function (auparse->srcpad,
195 GST_DEBUG_FUNCPTR (gst_au_parse_src_query));
196 gst_pad_set_event_function (auparse->srcpad,
197 GST_DEBUG_FUNCPTR (gst_au_parse_src_event));
199 gst_pad_use_fixed_caps (auparse->srcpad);
200 gst_pad_set_active (auparse->srcpad, TRUE);
202 if (auparse->src_caps)
203 gst_pad_set_caps (auparse->srcpad, auparse->src_caps);
205 GST_DEBUG_OBJECT (auparse, "Adding src pad with caps %" GST_PTR_FORMAT,
208 gst_object_ref (auparse->srcpad);
209 if (!gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad))
211 gst_element_no_more_pads (GST_ELEMENT (auparse));
218 gst_au_parse_remove_srcpad (GstAuParse * auparse)
222 if (auparse->srcpad != NULL) {
223 GST_DEBUG_OBJECT (auparse, "Removing src pad");
224 res = gst_element_remove_pad (GST_ELEMENT (auparse), auparse->srcpad);
225 g_return_val_if_fail (res != FALSE, FALSE);
226 gst_object_unref (auparse->srcpad);
227 auparse->srcpad = NULL;
234 gst_au_parse_parse_header (GstAuParse * auparse)
239 gchar layout[7] = { 0, };
240 gint law = 0, depth = 0, ieee = 0;
242 head = (guint8 *) gst_adapter_peek (auparse->adapter, 24);
243 g_assert (head != NULL);
245 GST_DEBUG_OBJECT (auparse, "[%c%c%c%c]", head[0], head[1], head[2], head[3]);
247 switch (GST_READ_UINT32_BE (head)) {
248 /* normal format is big endian (au is a Sparc format) */
249 case 0x2e736e64:{ /* ".snd" */
250 auparse->endianness = G_BIG_ENDIAN;
253 /* and of course, someone had to invent a little endian
254 * version. Used by DEC systems. */
255 case 0x646e732e: /* dns. */
256 case 0x0064732e:{ /* other source say it is "dns." */
257 auparse->endianness = G_LITTLE_ENDIAN;
265 auparse->offset = GST_READ_UINT32_BE (head + 4);
266 /* Do not trust size, could be set to -1 : unknown */
267 size = GST_READ_UINT32_BE (head + 8);
268 auparse->encoding = GST_READ_UINT32_BE (head + 12);
269 auparse->samplerate = GST_READ_UINT32_BE (head + 16);
270 auparse->channels = GST_READ_UINT32_BE (head + 20);
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 auparse->float_swap = 0;
288 switch (auparse->encoding) {
289 case 1: /* 8-bit ISDN mu-law G.711 */
293 case 27: /* 8-bit ISDN A-law G.711 */
298 case 2: /* 8-bit linear PCM */
301 case 3: /* 16-bit linear PCM */
304 case 4: /* 24-bit linear PCM */
307 case 5: /* 32-bit linear PCM */
311 case 6: /* 32-bit IEEE floating point */
315 case 7: /* 64-bit IEEE floating point */
320 case 23: /* 4-bit CCITT G.721 ADPCM 32kbps -> modplug/libsndfile (compressed 8-bit mu-law) */
321 strcpy (layout, "g721");
323 case 24: /* 8-bit CCITT G.722 ADPCM -> rtp */
324 strcpy (layout, "g722");
326 case 25: /* 3-bit CCITT G.723.3 ADPCM 24kbps -> rtp/xine/modplug/libsndfile */
327 strcpy (layout, "g723_3");
329 case 26: /* 5-bit CCITT G.723.5 ADPCM 40kbps -> rtp/xine/modplug/libsndfile */
330 strcpy (layout, "g723_5");
333 case 8: /* Fragmented sample data */
334 case 9: /* AU_ENCODING_NESTED */
336 case 10: /* DSP program */
337 case 11: /* DSP 8-bit fixed point */
338 case 12: /* DSP 16-bit fixed point */
339 case 13: /* DSP 24-bit fixed point */
340 case 14: /* DSP 32-bit fixed point */
342 case 16: /* AU_ENCODING_DISPLAY : non-audio display data */
343 case 17: /* AU_ENCODING_MULAW_SQUELCH */
345 case 18: /* 16-bit linear with emphasis */
346 case 19: /* 16-bit linear compressed (NeXT) */
347 case 20: /* 16-bit linear with emphasis and compression */
349 case 21: /* Music kit DSP commands */
350 case 22: /* Music kit DSP commands samples */
358 gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
359 "rate", G_TYPE_INT, auparse->samplerate,
360 "channels", G_TYPE_INT, auparse->channels, NULL);
361 auparse->sample_size = auparse->channels;
363 tempcaps = gst_caps_new_simple ("audio/x-raw-float",
364 "rate", G_TYPE_INT, auparse->samplerate,
365 "channels", G_TYPE_INT, auparse->channels,
366 "endianness", G_TYPE_INT, G_BYTE_ORDER,
367 "width", G_TYPE_INT, depth, NULL);
368 auparse->sample_size = auparse->channels * depth / 8;
369 if (auparse->endianness != G_BYTE_ORDER) {
370 GST_DEBUG_OBJECT (auparse, "need to swap float byte order ourselves!");
371 auparse->float_swap = depth;
373 } else if (layout[0]) {
374 tempcaps = gst_caps_new_simple ("audio/x-adpcm",
375 "layout", G_TYPE_STRING, layout, NULL);
376 auparse->sample_size = 0;
378 tempcaps = gst_caps_new_simple ("audio/x-raw-int",
379 "rate", G_TYPE_INT, auparse->samplerate,
380 "channels", G_TYPE_INT, auparse->channels,
381 "endianness", G_TYPE_INT, auparse->endianness,
382 "depth", G_TYPE_INT, depth, "width", G_TYPE_INT, depth,
383 /* FIXME: signed TRUE even for 8-bit PCM? */
384 "signed", G_TYPE_BOOLEAN, TRUE, NULL);
385 auparse->sample_size = auparse->channels * depth / 8;
388 GST_DEBUG_OBJECT (auparse, "sample_size=%d", auparse->sample_size);
390 if (!gst_au_parse_add_srcpad (auparse, tempcaps))
393 GST_DEBUG_OBJECT (auparse, "offset=%" G_GINT64_FORMAT, auparse->offset);
394 gst_adapter_flush (auparse->adapter, auparse->offset);
396 gst_caps_unref (tempcaps);
402 GST_ELEMENT_ERROR (auparse, STREAM, WRONG_TYPE, (NULL), (NULL));
403 return GST_FLOW_ERROR;
407 GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL), (NULL));
408 return GST_FLOW_ERROR;
412 GST_ELEMENT_ERROR (auparse, STREAM, FAILED, (NULL),
413 ("Failed to add srcpad"));
414 gst_caps_unref (tempcaps);
415 return GST_FLOW_ERROR;
419 #define AU_HEADER_SIZE 24
422 gst_au_parse_chain (GstPad * pad, GstBuffer * buf)
424 GstFlowReturn ret = GST_FLOW_OK;
426 gint avail, sendnow = 0;
428 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
430 GST_LOG_OBJECT (auparse, "got buffer of size %u", GST_BUFFER_SIZE (buf));
432 gst_adapter_push (auparse->adapter, buf);
435 /* if we haven't seen any data yet... */
436 if (auparse->srcpad == NULL) {
437 if (gst_adapter_available (auparse->adapter) < AU_HEADER_SIZE) {
438 GST_DEBUG_OBJECT (auparse, "need more data to parse header");
443 ret = gst_au_parse_parse_header (auparse);
444 if (ret != GST_FLOW_OK)
447 gst_pad_push_event (auparse->srcpad,
448 gst_event_new_new_segment (FALSE, 1.0, GST_FORMAT_DEFAULT,
449 0, GST_CLOCK_TIME_NONE, 0));
452 avail = gst_adapter_available (auparse->adapter);
454 if (auparse->sample_size > 0) {
455 /* Ensure we push a buffer that's a multiple of the frame size downstream */
456 sendnow = avail - (avail % auparse->sample_size);
458 /* It's something non-trivial (such as ADPCM), we don't understand it, so
459 * just push downstream and assume it will know what to do with it */
467 ret = gst_pad_alloc_buffer_and_set_caps (auparse->srcpad,
468 auparse->buffer_offset, sendnow, GST_PAD_CAPS (auparse->srcpad),
471 if (ret != GST_FLOW_OK) {
472 GST_DEBUG_OBJECT (auparse, "pad alloc flow: %s", gst_flow_get_name (ret));
476 data = gst_adapter_peek (auparse->adapter, sendnow);
478 /* audioconvert only handles floats in native endianness ... */
479 switch (auparse->float_swap) {
481 guint32 *indata = (guint32 *) data;
482 guint32 *outdata = (guint32 *) GST_BUFFER_DATA (outbuf);
485 for (i = 0; i < (sendnow / sizeof (guint32)); ++i) {
486 outdata[i] = GUINT32_SWAP_LE_BE (indata[i]);
491 guint64 *indata = (guint64 *) data;
492 guint64 *outdata = (guint64 *) GST_BUFFER_DATA (outbuf);
495 for (i = 0; i < (sendnow / sizeof (guint64)); ++i) {
496 outdata[i] = GUINT64_SWAP_LE_BE (indata[i]);
501 memcpy (GST_BUFFER_DATA (outbuf), data, sendnow);
506 gst_adapter_flush (auparse->adapter, sendnow);
508 auparse->buffer_offset += sendnow;
510 ret = gst_pad_push (auparse->srcpad, outbuf);
515 gst_object_unref (auparse);
520 gst_au_parse_src_convert (GstAuParse * auparse, GstFormat src_format,
521 gint64 srcval, GstFormat dest_format, gint64 * destval)
525 guint samplesize, rate;
527 if (dest_format == src_format) {
532 GST_OBJECT_LOCK (auparse);
533 samplesize = auparse->sample_size;
534 offset = auparse->offset;
535 rate = auparse->samplerate;
536 GST_OBJECT_UNLOCK (auparse);
538 if (samplesize == 0 || rate == 0) {
539 GST_LOG_OBJECT (auparse, "cannot convert, sample_size or rate unknown");
543 switch (src_format) {
544 case GST_FORMAT_BYTES:
545 srcval /= samplesize;
547 case GST_FORMAT_DEFAULT:{
548 switch (dest_format) {
549 case GST_FORMAT_BYTES:
550 *destval = srcval * samplesize;
552 case GST_FORMAT_TIME:
553 *destval = gst_util_uint64_scale_int (srcval, GST_SECOND, rate);
561 case GST_FORMAT_TIME:{
562 switch (dest_format) {
563 case GST_FORMAT_BYTES:
565 gst_util_uint64_scale_int (srcval, rate * samplesize, GST_SECOND);
567 case GST_FORMAT_DEFAULT:
568 *destval = gst_util_uint64_scale_int (srcval, rate, GST_SECOND);
583 GST_DEBUG_OBJECT (auparse, "could not convert from %s to %s format",
584 gst_format_get_name (src_format), gst_format_get_name (dest_format));
591 gst_au_parse_src_query (GstPad * pad, GstQuery * query)
594 gboolean ret = FALSE;
596 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
598 switch (GST_QUERY_TYPE (query)) {
599 case GST_QUERY_DURATION:{
600 GstFormat bformat = GST_FORMAT_BYTES;
604 gst_query_parse_duration (query, &format, NULL);
605 if (!gst_pad_query_peer_duration (auparse->sinkpad, &bformat, &len)) {
606 GST_DEBUG_OBJECT (auparse, "failed to query upstream length");
609 GST_OBJECT_LOCK (auparse);
610 len -= auparse->offset;
611 GST_OBJECT_UNLOCK (auparse);
613 ret = gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, len,
617 gst_query_set_duration (query, format, val);
621 case GST_QUERY_POSITION:{
622 GstFormat bformat = GST_FORMAT_BYTES;
626 gst_query_parse_position (query, &format, NULL);
627 if (!gst_pad_query_peer_position (auparse->sinkpad, &bformat, &pos)) {
628 GST_DEBUG_OBJECT (auparse, "failed to query upstream position");
631 GST_OBJECT_LOCK (auparse);
632 pos -= auparse->offset;
633 GST_OBJECT_UNLOCK (auparse);
635 ret = gst_au_parse_src_convert (auparse, GST_FORMAT_BYTES, pos,
639 gst_query_set_position (query, format, val);
644 ret = gst_pad_query_default (pad, query);
648 gst_object_unref (auparse);
653 gst_au_parse_handle_seek (GstAuParse * auparse, GstEvent * event)
655 GstSeekType start_type, stop_type;
661 gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
664 if (format != GST_FORMAT_TIME) {
665 GST_DEBUG_OBJECT (auparse, "only support seeks in TIME format");
669 /* FIXME: implement seeking */
674 gst_au_parse_sink_event (GstPad * pad, GstEvent * event)
679 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
681 switch (GST_EVENT_TYPE (event)) {
683 ret = gst_pad_event_default (pad, event);
687 gst_object_unref (auparse);
692 gst_au_parse_src_event (GstPad * pad, GstEvent * event)
697 auparse = GST_AU_PARSE (gst_pad_get_parent (pad));
699 switch (GST_EVENT_TYPE (event)) {
701 ret = gst_au_parse_handle_seek (auparse, event);
704 ret = gst_pad_event_default (pad, event);
708 gst_object_unref (auparse);
712 static GstStateChangeReturn
713 gst_au_parse_change_state (GstElement * element, GstStateChange transition)
715 GstAuParse *auparse = GST_AU_PARSE (element);
716 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
718 ret = parent_class->change_state (element, transition);
719 if (ret == GST_STATE_CHANGE_FAILURE)
722 switch (transition) {
723 case GST_STATE_CHANGE_PAUSED_TO_READY:
724 gst_au_parse_reset (auparse);
733 plugin_init (GstPlugin * plugin)
735 if (!gst_element_register (plugin, "auparse", GST_RANK_SECONDARY,
736 GST_TYPE_AU_PARSE)) {
743 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
746 "parses au streams", plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME,