1 /* -*- mOde: C; tab-width: 2; indent-tabs-mode: t; c-basic-offset: 2 -*- */
2 /* GStreamer .wav encoder
3 * Copyright (C) <2002> Iain Holmes <iain@prettypeople.org>
4 * Copyright (C) <2006> Tim-Philipp Müller <tim centricular net>
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 * Boston, MA 02111-1307, USA.
23 * SECTION:element-wavenc
25 * Format a audio stream into the wav format.
33 #include "gstwavenc.h"
35 #include <gst/riff/riff-media.h>
37 GST_DEBUG_CATEGORY_STATIC (wavenc_debug);
38 #define GST_CAT_DEFAULT wavenc_debug
42 guint8 id[4]; /* RIFF */
44 guint8 wav_id[4]; /* WAVE */
57 guint32 dwSamplesPerSec;
58 guint32 dwAvgBytesPerSec;
60 guint16 wBitsPerSample; /* Only for PCM */
65 struct riff_struct riff;
66 struct chunk_struct format;
67 struct common_struct common;
68 struct chunk_struct data;
71 /* FIXME: mono doesn't produce correct files it seems, at least mplayer xruns */
72 /* Max. of two channels, more channels need WAVFORMATEX with
73 * channel layout, which we do not support yet */
76 "rate = (int) [ 1, MAX ], " \
77 "channels = (int) [ 1, 2 ], " \
78 "endianness = (int) LITTLE_ENDIAN, " \
79 "width = (int) 32, " \
80 "depth = (int) 32, " \
81 "signed = (boolean) true" \
84 "rate = (int) [ 1, MAX ], " \
85 "channels = (int) [ 1, 2 ], " \
86 "endianness = (int) LITTLE_ENDIAN, " \
87 "width = (int) 24, " \
88 "depth = (int) 24, " \
89 "signed = (boolean) true" \
92 "rate = (int) [ 1, MAX ], " \
93 "channels = (int) [ 1, 2 ], " \
94 "endianness = (int) LITTLE_ENDIAN, " \
95 "width = (int) 16, " \
96 "depth = (int) 16, " \
97 "signed = (boolean) true" \
100 "rate = (int) [ 1, MAX ], " \
101 "channels = (int) [ 1, 2 ], " \
102 "width = (int) 8, " \
103 "depth = (int) 8, " \
104 "signed = (boolean) false" \
106 "audio/x-raw-float, " \
107 "rate = (int) [ 1, MAX ], " \
108 "channels = (int) [ 1, 2 ], " \
109 "endianness = (int) LITTLE_ENDIAN, " \
110 "width = (int) { 32, 64 }; " \
112 "rate = (int) [ 8000, 192000 ], " \
113 "channels = (int) [ 1, 2 ], " \
114 "width = (int) 8, " \
115 "depth = (int) 8, " \
116 "signed = (boolean) false; " \
118 "rate = (int) [ 8000, 192000 ], " \
119 "channels = (int) [ 1, 2 ], " \
120 "width = (int) 8, " \
121 "depth = (int) 8, " \
122 "signed = (boolean) false"
125 static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
128 GST_STATIC_CAPS (SINK_CAPS)
131 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
134 GST_STATIC_CAPS ("audio/x-wav")
137 #define gst_wavenc_parent_class parent_class
138 G_DEFINE_TYPE (GstWavEnc, gst_wavenc, GST_TYPE_ELEMENT);
140 static GstFlowReturn gst_wavenc_chain (GstPad * pad, GstBuffer * buf);
141 static gboolean gst_wavenc_event (GstPad * pad, GstEvent * event);
142 static GstStateChangeReturn gst_wavenc_change_state (GstElement * element,
143 GstStateChange transition);
144 static gboolean gst_wavenc_sink_setcaps (GstPad * pad, GstCaps * caps);
147 gst_wavenc_class_init (GstWavEncClass * klass)
149 GstElementClass *element_class;
151 element_class = (GstElementClass *) klass;
153 element_class->change_state = GST_DEBUG_FUNCPTR (gst_wavenc_change_state);
155 gst_element_class_set_details_simple (element_class, "WAV audio muxer",
157 "Encode raw audio into WAV", "Iain Holmes <iain@prettypeople.org>");
159 gst_element_class_add_pad_template (element_class,
160 gst_static_pad_template_get (&src_factory));
161 gst_element_class_add_pad_template (element_class,
162 gst_static_pad_template_get (&sink_factory));
164 GST_DEBUG_CATEGORY_INIT (wavenc_debug, "wavenc", 0, "WAV encoder element");
168 gst_wavenc_init (GstWavEnc * wavenc)
170 wavenc->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
171 gst_pad_set_chain_function (wavenc->sinkpad,
172 GST_DEBUG_FUNCPTR (gst_wavenc_chain));
173 gst_pad_set_event_function (wavenc->sinkpad,
174 GST_DEBUG_FUNCPTR (gst_wavenc_event));
175 gst_pad_use_fixed_caps (wavenc->sinkpad);
176 gst_element_add_pad (GST_ELEMENT (wavenc), wavenc->sinkpad);
178 wavenc->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
179 gst_pad_use_fixed_caps (wavenc->srcpad);
180 gst_pad_set_caps (wavenc->srcpad,
181 gst_static_pad_template_get_caps (&src_factory));
182 gst_element_add_pad (GST_ELEMENT (wavenc), wavenc->srcpad);
185 #define WAV_HEADER_LEN 44
188 gst_wavenc_create_header_buf (GstWavEnc * wavenc, guint audio_data_size)
190 struct wave_header wave;
194 buf = gst_buffer_new_and_alloc (WAV_HEADER_LEN);
195 header = gst_buffer_map (buf, NULL, NULL, GST_MAP_WRITE);
196 memset (header, 0, WAV_HEADER_LEN);
198 wave.common.wChannels = wavenc->channels;
199 wave.common.wBitsPerSample = wavenc->width;
200 wave.common.dwSamplesPerSec = wavenc->rate;
202 /* Fill out our wav-header with some information */
203 memcpy (wave.riff.id, "RIFF", 4);
204 wave.riff.len = audio_data_size + WAV_HEADER_LEN - 8;
205 memcpy (wave.riff.wav_id, "WAVE", 4);
207 memcpy (wave.format.id, "fmt ", 4);
208 wave.format.len = 16;
210 wave.common.wFormatTag = wavenc->format;
211 wave.common.wBlockAlign = (wavenc->width / 8) * wave.common.wChannels;
212 wave.common.dwAvgBytesPerSec =
213 wave.common.wBlockAlign * wave.common.dwSamplesPerSec;
215 memcpy (wave.data.id, "data", 4);
216 wave.data.len = audio_data_size;
218 memcpy (header, (char *) wave.riff.id, 4);
219 GST_WRITE_UINT32_LE (header + 4, wave.riff.len);
220 memcpy (header + 8, (char *) wave.riff.wav_id, 4);
221 memcpy (header + 12, (char *) wave.format.id, 4);
222 GST_WRITE_UINT32_LE (header + 16, wave.format.len);
223 GST_WRITE_UINT16_LE (header + 20, wave.common.wFormatTag);
224 GST_WRITE_UINT16_LE (header + 22, wave.common.wChannels);
225 GST_WRITE_UINT32_LE (header + 24, wave.common.dwSamplesPerSec);
226 GST_WRITE_UINT32_LE (header + 28, wave.common.dwAvgBytesPerSec);
227 GST_WRITE_UINT16_LE (header + 32, wave.common.wBlockAlign);
228 GST_WRITE_UINT16_LE (header + 34, wave.common.wBitsPerSample);
229 memcpy (header + 36, (char *) wave.data.id, 4);
230 GST_WRITE_UINT32_LE (header + 40, wave.data.len);
232 gst_buffer_unmap (buf, header, -1);
238 gst_wavenc_push_header (GstWavEnc * wavenc, guint audio_data_size)
244 /* seek to beginning of file */
245 gst_segment_init (&segment, GST_FORMAT_BYTES);
246 gst_pad_push_event (wavenc->srcpad, gst_event_new_segment (&segment));
248 GST_DEBUG_OBJECT (wavenc, "writing header with datasize=%u", audio_data_size);
250 outbuf = gst_wavenc_create_header_buf (wavenc, audio_data_size);
251 GST_BUFFER_OFFSET (outbuf) = 0;
253 ret = gst_pad_push (wavenc->srcpad, outbuf);
255 if (ret != GST_FLOW_OK) {
256 GST_WARNING_OBJECT (wavenc, "push header failed: flow = %s",
257 gst_flow_get_name (ret));
264 gst_wavenc_sink_setcaps (GstPad * pad, GstCaps * caps)
267 GstStructure *structure;
269 gint chans, rate, width;
272 wavenc = GST_WAVENC (gst_pad_get_parent (pad));
274 ccaps = gst_pad_get_current_caps (pad);
275 if (wavenc->sent_header && ccaps && !gst_caps_can_intersect (caps, ccaps)) {
276 gst_caps_unref (ccaps);
277 GST_WARNING_OBJECT (wavenc, "cannot change format in middle of stream");
281 gst_caps_unref (ccaps);
283 GST_DEBUG_OBJECT (wavenc, "got caps: %" GST_PTR_FORMAT, caps);
285 structure = gst_caps_get_structure (caps, 0);
286 name = gst_structure_get_name (structure);
288 if (!gst_structure_get_int (structure, "channels", &chans) ||
289 !gst_structure_get_int (structure, "rate", &rate)) {
290 GST_WARNING_OBJECT (wavenc, "caps incomplete");
294 if (strcmp (name, "audio/x-raw-int") == 0) {
295 if (!gst_structure_get_int (structure, "width", &width)) {
296 GST_WARNING_OBJECT (wavenc, "caps incomplete");
299 wavenc->format = GST_RIFF_WAVE_FORMAT_PCM;
300 wavenc->width = width;
301 } else if (strcmp (name, "audio/x-raw-float") == 0) {
302 if (!gst_structure_get_int (structure, "width", &width)) {
303 GST_WARNING_OBJECT (wavenc, "caps incomplete");
306 wavenc->format = GST_RIFF_WAVE_FORMAT_IEEE_FLOAT;
307 wavenc->width = width;
308 } else if (strcmp (name, "audio/x-alaw") == 0) {
309 wavenc->format = GST_RIFF_WAVE_FORMAT_ALAW;
311 } else if (strcmp (name, "audio/x-mulaw") == 0) {
312 wavenc->format = GST_RIFF_WAVE_FORMAT_MULAW;
315 GST_WARNING_OBJECT (wavenc, "Unsupported format %s", name);
319 wavenc->channels = chans;
322 GST_LOG_OBJECT (wavenc,
323 "accepted caps: format=0x%04x chans=%u width=%u rate=%u",
324 wavenc->format, wavenc->channels, wavenc->width, wavenc->rate);
326 gst_object_unref (wavenc);
330 gst_object_unref (wavenc);
341 GST_RIFF_INFO_IARL, "Location"}, {
342 GST_RIFF_INFO_IART, "Artist"}, {
343 GST_RIFF_INFO_ICMS, "Commissioner"}, {
344 GST_RIFF_INFO_ICMT, "Comment"}, {
345 GST_RIFF_INFO_ICOP, "Copyright"}, {
346 GST_RIFF_INFO_ICRD, "Creation Date"}, {
347 GST_RIFF_INFO_IENG, "Engineer"}, {
348 GST_RIFF_INFO_IGNR, "Genre"}, {
349 GST_RIFF_INFO_IKEY, "Keywords"}, {
350 GST_RIFF_INFO_INAM, "Title"}, {
351 GST_RIFF_INFO_IPRD, "Product"}, {
352 GST_RIFF_INFO_ISBJ, "Subject"}, {
353 GST_RIFF_INFO_ISFT, "Software"}, {
354 GST_RIFF_INFO_ITCH, "Technician"}
358 get_id_from_name (const char *name)
362 for (i = 0; i < G_N_ELEMENTS (maps); i++) {
363 if (strcasecmp (maps[i].name, name) == 0) {
372 write_metadata (GstWavEnc * wavenc)
377 gboolean need_to_write = FALSE;
379 info_str = g_string_new ("LIST INFO");
381 for (props = wavenc->metadata->properties->properties; props;
382 props = props->next) {
383 GstPropsEntry *entry = props->data;
387 name = gst_props_entry_get_name (entry);
388 id = get_id_from_name (name);
394 need_to_write = TRUE; /* We've got at least one entry */
396 gst_props_entry_get_string (entry, &text);
397 len = strlen (text) + 1; /* The length in the file includes the \0 */
399 tmp = g_strdup_printf ("%" GST_FOURCC_FORMAT "%d%s", GST_FOURCC_ARGS (id),
400 GUINT32_TO_LE (len), text);
401 g_string_append (info_str, tmp);
404 /* Check that we end on an even boundary */
405 req = ((len + 8) + 1) & ~1;
406 for (i = 0; i < req - len; i++) {
407 g_string_append_printf (info_str, "%c", 0);
417 /* Now we've got all the strings together, we can write our length in */
418 info_str->str[4] = GUINT32_TO_LE (total);
420 buf = gst_buffer_new ();
421 gst_buffer_set_data (buf, info_str->str, info_str->len);
423 gst_pad_push (wavenc->srcpad, GST_DATA (buf));
424 g_string_free (info_str, FALSE);
429 write_cues (GstWavEnc * wavenc)
431 GString *cue_string, *point_string;
434 int num_cues, total = 4;
436 if (gst_props_get (wavenc->metadata->properties,
437 "cues", &cue_list, NULL) == FALSE) {
438 /* No cues, move along please, nothing to see here */
442 /* Space for 'cue ', chunk size and number of cuepoints */
443 cue_string = g_string_new ("cue ");
444 #define CUEPOINT_SIZE 24
445 point_string = g_string_sized_new (CUEPOINT_SIZE);
447 for (c = cue_list, num_cues = 0; c; c = c->next, num_cues++) {
448 GstCaps *cue_caps = c->data;
451 gst_props_get (cue_caps->properties, "position", &pos, NULL);
453 point_string->str[0] = GUINT32_TO_LE (num_cues + 1);
454 point_string->str[4] = GUINT32_TO_LE (0);
455 /* Fixme: There is probably a macro for this */
456 point_string->str[8] = 'd';
457 point_string->str[9] = 'a';
458 point_string->str[10] = 't';
459 point_string->str[11] = 'a';
460 point_string->str[12] = GUINT32_TO_LE (0);
461 point_string->str[16] = GUINT32_TO_LE (0);
462 point_string->str[20] = GUINT32_TO_LE (pos);
464 total += CUEPOINT_SIZE;
467 /* Set the length and chunk size */
468 cue_string->str[4] = GUINT32_TO_LE (total);
469 cue_string->str[8] = GUINT32_TO_LE (num_cues);
470 /* Stick the cue points on the end */
471 g_string_append (cue_string, point_string->str);
472 g_string_free (point_string, TRUE);
474 buf = gst_buffer_new ();
475 gst_buffer_set_data (buf, cue_string->str, cue_string->len);
477 gst_pad_push (wavenc->srcpad, GST_DATA (buf));
478 g_string_free (cue_string, FALSE);
482 write_labels (GstWavEnc * wavenc)
489 info_str = g_string_new ("LIST adtl");
490 if (gst_props_get (wavenc->metadata->properties, "ltxts", &caps, NULL)) {
494 for (p = caps, i = 1; p; p = p->next, i++) {
495 GstCaps *ltxt_caps = p->data;
500 gst_props_get (ltxt_caps->properties, "name", &label, NULL);
501 len = strlen (label);
504 ltxt = g_string_new ("ltxt ");
505 ltxt->str[8] = GUINT32_TO_LE (i); /* Identifier */
506 ltxt->str[12] = GUINT32_TO_LE (0); /* Sample Length */
507 ltxt->str[16] = GUINT32_TO_LE (0); /* FIXME: Don't save the purpose yet */
508 ltxt->str[20] = GUINT16_TO_LE (0); /* Country */
509 ltxt->str[22] = GUINT16_TO_LE (0); /* Language */
510 ltxt->str[24] = GUINT16_TO_LE (0); /* Dialect */
511 ltxt->str[26] = GUINT16_TO_LE (0); /* Code Page */
512 g_string_append (ltxt, label);
517 ltxt->str[4] = GUINT32_TO_LE (len);
519 /* Check that we end on an even boundary */
520 req = ((len + 8) + 1) & ~1;
521 for (j = 0; j < req - len; j++) {
522 g_string_append_printf (ltxt, "%c", 0);
527 g_string_append (info_str, ltxt->str);
528 g_string_free (ltxt, TRUE);
532 if (gst_props_get (wavenc->metadata->properties, "labels", &caps, NULL)) {
536 for (p = caps, i = 1; p; p = p->next, i++) {
537 GstCaps *labl_caps = p->data;
542 gst_props_get (labl_caps->properties, "name", &label, NULL);
543 len = strlen (label);
546 labl = g_string_new ("labl ");
547 labl->str[8] = GUINT32_TO_LE (i);
548 g_string_append (labl, label);
553 labl->str[4] = GUINT32_TO_LE (len);
556 req = ((len + 8) + 1) & ~1;
557 for (j = 0; j < req - len; j++) {
558 g_string_append_printf (labl, "%c", 0);
563 g_string_append (info_str, labl->str);
564 g_string_free (labl, TRUE);
568 if (gst_props_get (wavenc->metadata->properties, "notes", &caps, NULL)) {
572 for (p = caps, i = 1; p; p = p->next, i++) {
573 GstCaps *note_caps = p->data;
578 gst_props_get (note_caps->properties, "name", &label, NULL);
579 len = strlen (label);
582 note = g_string_new ("note ");
583 note->str[8] = GUINT32_TO_LE (i);
584 g_string_append (note, label);
589 note->str[4] = GUINT32_TO_LE (len);
592 req = ((len + 8) + 1) & ~1;
593 for (j = 0; j < req - len; j++) {
594 g_string_append_printf (note, "%c", 0);
599 g_string_append (info_str, note->str);
600 g_string_free (note, TRUE);
604 info_str->str[4] = GUINT32_TO_LE (total);
606 buf = gst_buffer_new ();
607 gst_buffer_set_data (buf, info_str->str, info_str->len);
609 gst_pad_push (wavenc->srcpad, GST_DATA (buf));
610 g_string_free (info_str, FALSE);
615 gst_wavenc_event (GstPad * pad, GstEvent * event)
620 wavenc = GST_WAVENC (gst_pad_get_parent (pad));
622 switch (GST_EVENT_TYPE (event)) {
627 gst_event_parse_caps (event, &caps);
628 gst_wavenc_sink_setcaps (pad, caps);
630 /* have our own src caps */
631 gst_event_unref (event);
635 GST_DEBUG_OBJECT (wavenc, "got EOS");
637 /* Write our metadata if we have any */
638 if (wavenc->metadata) {
639 write_metadata (wavenc);
641 write_labels (wavenc);
644 /* write header with correct length values */
645 gst_wavenc_push_header (wavenc, wavenc->length);
647 /* we're done with this file */
648 wavenc->finished_properly = TRUE;
650 /* and forward the EOS event */
651 res = gst_pad_event_default (pad, event);
654 case GST_EVENT_SEGMENT:
655 /* Just drop it, it's probably in TIME format
656 * anyway. We'll send our own newsegment event */
657 gst_event_unref (event);
660 res = gst_pad_event_default (pad, event);
664 gst_object_unref (wavenc);
669 gst_wavenc_chain (GstPad * pad, GstBuffer * buf)
671 GstWavEnc *wavenc = GST_WAVENC (GST_PAD_PARENT (pad));
672 GstFlowReturn flow = GST_FLOW_OK;
674 g_return_val_if_fail (wavenc->channels > 0, GST_FLOW_WRONG_STATE);
676 if (!wavenc->sent_header) {
677 /* use bogus size initially, we'll write the real
678 * header when we get EOS and know the exact length */
679 flow = gst_wavenc_push_header (wavenc, 0x7FFF0000);
681 /* starting a file, means we have to finish it properly */
682 wavenc->finished_properly = FALSE;
684 if (flow != GST_FLOW_OK)
687 GST_DEBUG_OBJECT (wavenc, "wrote dummy header");
688 wavenc->sent_header = TRUE;
691 GST_LOG_OBJECT (wavenc, "pushing %u bytes raw audio, ts=%" GST_TIME_FORMAT,
692 gst_buffer_get_size (buf), GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)));
694 buf = gst_buffer_make_writable (buf);
696 GST_BUFFER_OFFSET (buf) = WAV_HEADER_LEN + wavenc->length;
697 GST_BUFFER_OFFSET_END (buf) = GST_BUFFER_OFFSET_NONE;
699 wavenc->length += gst_buffer_get_size (buf);
701 flow = gst_pad_push (wavenc->srcpad, buf);
706 static GstStateChangeReturn
707 gst_wavenc_change_state (GstElement * element, GstStateChange transition)
709 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
710 GstWavEnc *wavenc = GST_WAVENC (element);
712 switch (transition) {
713 case GST_STATE_CHANGE_NULL_TO_READY:
715 wavenc->channels = 0;
719 wavenc->sent_header = FALSE;
720 /* its true because we haven't writen anything */
721 wavenc->finished_properly = TRUE;
727 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
728 if (ret != GST_STATE_CHANGE_SUCCESS)
731 switch (transition) {
732 case GST_STATE_CHANGE_PAUSED_TO_READY:
733 if (!wavenc->finished_properly) {
734 GST_ELEMENT_WARNING (wavenc, STREAM, MUX,
735 ("Wav stream not finished properly"),
736 ("Wav stream not finished properly, no EOS received "
748 plugin_init (GstPlugin * plugin)
750 return gst_element_register (plugin, "wavenc", GST_RANK_PRIMARY,
754 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
757 "Encode raw audio into WAV",
758 plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)