1 /* GStreamer OGM parsing
2 * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
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.
29 #include <gst/tag/tag.h>
30 #include <gst/riff/riff-media.h>
31 #include <gst/riff/riff-read.h>
33 GST_DEBUG_CATEGORY_STATIC (gst_ogm_parse_debug);
34 #define GST_CAT_DEFAULT gst_ogm_parse_debug
36 #define GST_TYPE_OGM_VIDEO_PARSE (gst_ogm_video_parse_get_type())
37 #define GST_IS_OGM_VIDEO_PARSE(obj) \
38 (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_OGM_VIDEO_PARSE))
40 #define GST_TYPE_OGM_AUDIO_PARSE (gst_ogm_audio_parse_get_type())
41 #define GST_IS_OGM_AUDIO_PARSE(obj) \
42 (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_OGM_AUDIO_PARSE))
44 #define GST_TYPE_OGM_TEXT_PARSE (gst_ogm_text_parse_get_type())
45 #define GST_IS_OGM_TEXT_PARSE(obj) \
46 (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_OGM_TEXT_PARSE))
48 #define GST_TYPE_OGM_PARSE (gst_ogm_parse_get_type())
49 #define GST_OGM_PARSE(obj) \
50 (G_TYPE_CHECK_INSTANCE_CAST((obj), GST_TYPE_OGM_PARSE, GstOgmParse))
51 #define GST_OGM_PARSE_CLASS(klass) \
52 (G_TYPE_CHECK_CLASS_CAST((klass), GST_TYPE_OGM_PARSE, GstOgmParse))
53 #define GST_IS_OGM_PARSE(obj) \
54 (G_TYPE_CHECK_INSTANCE_TYPE((obj), GST_TYPE_OGM_PARSE))
55 #define GST_IS_OGM_PARSE_CLASS(klass) \
56 (G_TYPE_CHECK_CLASS_TYPE((klass), GST_TYPE_OGM_PARSE))
57 #define GST_OGM_PARSE_GET_CLASS(obj) \
58 (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_OGM_PARSE, GstOgmParseClass))
60 static const GstElementDetails gst_ogm_audio_parse_details =
61 GST_ELEMENT_DETAILS ("OGM audio stream parser",
62 "Codec/Decoder/Audio",
63 "parse an OGM audio header and stream",
64 "GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
66 static const GstElementDetails gst_ogm_video_parse_details =
67 GST_ELEMENT_DETAILS ("OGM video stream parser",
68 "Codec/Decoder/Video",
69 "parse an OGM video header and stream",
70 "GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
72 static const GstElementDetails gst_ogm_text_parse_details =
73 GST_ELEMENT_DETAILS ("OGM text stream parser",
74 "Codec/Decoder/Subtitle",
75 "parse an OGM text header and stream",
76 "GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
78 typedef struct _stream_header_video
82 } stream_header_video;
84 typedef struct _stream_header_audio
88 gint32 avgbytespersec;
89 } stream_header_audio;
91 /* sizeof(stream_header) might differ due to structure packing and
92 * alignment differences on some architectures, so not using that */
93 #define OGM_STREAM_HEADER_SIZE (8+4+4+8+8+4+4+4+8)
95 typedef struct _stream_header
100 /* size of the structure */
103 /* in reference time */
106 gint64 samples_per_unit;
112 gint32 bits_per_sample;
116 stream_header_video video;
117 stream_header_audio audio;
118 /* text has no additional data */
122 typedef struct _GstOgmParse
127 GstPad *srcpad, *sinkpad;
128 GstPadTemplate *srcpadtempl;
130 /* we need to cache events that we receive before creating the source pad */
131 GList *cached_events;
136 /* expected next granulepos (used for timestamp guessing) */
137 guint64 next_granulepos;
140 typedef struct _GstOgmParseClass
142 GstElementClass parent_class;
145 static GstStaticPadTemplate sink_factory_video =
146 GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
147 GST_STATIC_CAPS ("application/x-ogm-video"));
148 static GstStaticPadTemplate sink_factory_audio =
149 GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
150 GST_STATIC_CAPS ("application/x-ogm-audio"));
151 static GstStaticPadTemplate sink_factory_text =
152 GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
153 GST_STATIC_CAPS ("application/x-ogm-text"));
154 static GstPadTemplate *video_src_templ, *audio_src_templ, *text_src_templ;
156 static GType gst_ogm_audio_parse_get_type (void);
157 static GType gst_ogm_video_parse_get_type (void);
158 static GType gst_ogm_text_parse_get_type (void);
159 static GType gst_ogm_parse_get_type (void);
161 static void gst_ogm_audio_parse_base_init (GstOgmParseClass * klass);
162 static void gst_ogm_video_parse_base_init (GstOgmParseClass * klass);
163 static void gst_ogm_text_parse_base_init (GstOgmParseClass * klass);
164 static void gst_ogm_parse_class_init (GstOgmParseClass * klass);
165 static void gst_ogm_parse_init (GstOgmParse * ogm);
166 static void gst_ogm_video_parse_init (GstOgmParse * ogm);
167 static void gst_ogm_audio_parse_init (GstOgmParse * ogm);
168 static void gst_ogm_text_parse_init (GstOgmParse * ogm);
170 static const GstQueryType *gst_ogm_parse_get_sink_querytypes (GstPad * pad);
171 static gboolean gst_ogm_parse_sink_event (GstPad * pad, GstEvent * event);
172 static gboolean gst_ogm_parse_sink_query (GstPad * pad, GstQuery * query);
173 static gboolean gst_ogm_parse_sink_convert (GstPad * pad, GstFormat src_format,
174 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
176 static GstFlowReturn gst_ogm_parse_chain (GstPad * pad, GstBuffer * buffer);
178 static GstStateChangeReturn gst_ogm_parse_change_state (GstElement * element,
179 GstStateChange transition);
181 static GstElementClass *parent_class = NULL;
184 gst_ogm_parse_get_type (void)
186 static GType ogm_parse_type = 0;
188 if (!ogm_parse_type) {
189 static const GTypeInfo ogm_parse_info = {
190 sizeof (GstOgmParseClass),
193 (GClassInitFunc) gst_ogm_parse_class_init,
196 sizeof (GstOgmParse),
198 (GInstanceInitFunc) gst_ogm_parse_init,
202 g_type_register_static (GST_TYPE_ELEMENT,
203 "GstOgmParse", &ogm_parse_info, 0);
206 return ogm_parse_type;
210 gst_ogm_audio_parse_get_type (void)
212 static GType ogm_audio_parse_type = 0;
214 if (!ogm_audio_parse_type) {
215 static const GTypeInfo ogm_audio_parse_info = {
216 sizeof (GstOgmParseClass),
217 (GBaseInitFunc) gst_ogm_audio_parse_base_init,
222 sizeof (GstOgmParse),
224 (GInstanceInitFunc) gst_ogm_audio_parse_init,
227 ogm_audio_parse_type =
228 g_type_register_static (GST_TYPE_OGM_PARSE,
229 "GstOgmAudioParse", &ogm_audio_parse_info, 0);
232 return ogm_audio_parse_type;
236 gst_ogm_video_parse_get_type (void)
238 static GType ogm_video_parse_type = 0;
240 if (!ogm_video_parse_type) {
241 static const GTypeInfo ogm_video_parse_info = {
242 sizeof (GstOgmParseClass),
243 (GBaseInitFunc) gst_ogm_video_parse_base_init,
248 sizeof (GstOgmParse),
250 (GInstanceInitFunc) gst_ogm_video_parse_init,
253 ogm_video_parse_type =
254 g_type_register_static (GST_TYPE_OGM_PARSE,
255 "GstOgmVideoParse", &ogm_video_parse_info, 0);
258 return ogm_video_parse_type;
262 gst_ogm_text_parse_get_type (void)
264 static GType ogm_text_parse_type = 0;
266 if (!ogm_text_parse_type) {
267 static const GTypeInfo ogm_text_parse_info = {
268 sizeof (GstOgmParseClass),
269 (GBaseInitFunc) gst_ogm_text_parse_base_init,
274 sizeof (GstOgmParse),
276 (GInstanceInitFunc) gst_ogm_text_parse_init,
279 ogm_text_parse_type =
280 g_type_register_static (GST_TYPE_OGM_PARSE,
281 "GstOgmTextParse", &ogm_text_parse_info, 0);
284 return ogm_text_parse_type;
288 gst_ogm_audio_parse_base_init (GstOgmParseClass * klass)
290 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
291 GstCaps *caps = gst_riff_create_audio_template_caps ();
293 gst_element_class_set_details (element_class, &gst_ogm_audio_parse_details);
295 gst_element_class_add_pad_template (element_class,
296 gst_static_pad_template_get (&sink_factory_audio));
297 audio_src_templ = gst_pad_template_new ("src",
298 GST_PAD_SRC, GST_PAD_SOMETIMES, caps);
299 gst_element_class_add_pad_template (element_class, audio_src_templ);
303 gst_ogm_video_parse_base_init (GstOgmParseClass * klass)
305 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
306 GstCaps *caps = gst_riff_create_video_template_caps ();
308 gst_element_class_set_details (element_class, &gst_ogm_video_parse_details);
310 gst_element_class_add_pad_template (element_class,
311 gst_static_pad_template_get (&sink_factory_video));
312 video_src_templ = gst_pad_template_new ("src",
313 GST_PAD_SRC, GST_PAD_SOMETIMES, caps);
314 gst_element_class_add_pad_template (element_class, video_src_templ);
318 gst_ogm_text_parse_base_init (GstOgmParseClass * klass)
320 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
321 GstCaps *caps = gst_caps_new_simple ("text/plain", NULL, NULL);
323 gst_element_class_set_details (element_class, &gst_ogm_text_parse_details);
325 gst_element_class_add_pad_template (element_class,
326 gst_static_pad_template_get (&sink_factory_text));
327 text_src_templ = gst_pad_template_new ("src",
328 GST_PAD_SRC, GST_PAD_SOMETIMES, caps);
329 gst_element_class_add_pad_template (element_class, text_src_templ);
333 gst_ogm_parse_class_init (GstOgmParseClass * klass)
335 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
337 parent_class = g_type_class_peek_parent (klass);
339 gstelement_class->change_state =
340 GST_DEBUG_FUNCPTR (gst_ogm_parse_change_state);
344 gst_ogm_parse_init (GstOgmParse * ogm)
346 memset (&ogm->hdr, 0, sizeof (ogm->hdr));
347 ogm->next_granulepos = 0;
349 ogm->cached_events = NULL;
353 gst_ogm_audio_parse_init (GstOgmParse * ogm)
355 ogm->sinkpad = gst_pad_new_from_static_template (&sink_factory_audio, "sink");
356 gst_pad_set_query_function (ogm->sinkpad,
357 GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_query));
358 gst_pad_set_chain_function (ogm->sinkpad,
359 GST_DEBUG_FUNCPTR (gst_ogm_parse_chain));
360 gst_pad_set_event_function (ogm->sinkpad,
361 GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_event));
362 gst_element_add_pad (GST_ELEMENT (ogm), ogm->sinkpad);
365 ogm->srcpadtempl = audio_src_templ;
369 gst_ogm_video_parse_init (GstOgmParse * ogm)
371 ogm->sinkpad = gst_pad_new_from_static_template (&sink_factory_video, "sink");
372 gst_pad_set_query_function (ogm->sinkpad,
373 GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_query));
374 gst_pad_set_chain_function (ogm->sinkpad,
375 GST_DEBUG_FUNCPTR (gst_ogm_parse_chain));
376 gst_pad_set_event_function (ogm->sinkpad,
377 GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_event));
378 gst_element_add_pad (GST_ELEMENT (ogm), ogm->sinkpad);
381 ogm->srcpadtempl = video_src_templ;
385 gst_ogm_text_parse_init (GstOgmParse * ogm)
387 ogm->sinkpad = gst_pad_new_from_static_template (&sink_factory_text, "sink");
388 gst_pad_set_query_type_function (ogm->sinkpad,
389 gst_ogm_parse_get_sink_querytypes);
390 gst_pad_set_query_function (ogm->sinkpad,
391 GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_query));
392 gst_pad_set_chain_function (ogm->sinkpad,
393 GST_DEBUG_FUNCPTR (gst_ogm_parse_chain));
394 gst_pad_set_event_function (ogm->sinkpad,
395 GST_DEBUG_FUNCPTR (gst_ogm_parse_sink_event));
396 gst_element_add_pad (GST_ELEMENT (ogm), ogm->sinkpad);
399 ogm->srcpadtempl = text_src_templ;
402 static const GstQueryType *
403 gst_ogm_parse_get_sink_querytypes (GstPad * pad)
405 static const GstQueryType types[] = {
414 gst_ogm_parse_sink_convert (GstPad * pad,
415 GstFormat src_format, gint64 src_value,
416 GstFormat * dest_format, gint64 * dest_value)
418 gboolean res = FALSE;
419 GstOgmParse *ogm = GST_OGM_PARSE (gst_pad_get_parent (pad));
421 switch (src_format) {
422 case GST_FORMAT_DEFAULT:
423 switch (*dest_format) {
424 case GST_FORMAT_TIME:
425 switch (ogm->hdr.streamtype[0]) {
427 *dest_value = GST_SECOND * src_value / ogm->hdr.samples_per_unit;
432 *dest_value = (GST_SECOND / 10000000) *
433 ogm->hdr.time_unit * src_value;
444 case GST_FORMAT_TIME:
445 switch (*dest_format) {
446 case GST_FORMAT_DEFAULT:
447 switch (ogm->hdr.streamtype[0]) {
449 *dest_value = ogm->hdr.samples_per_unit * src_value / GST_SECOND;
454 *dest_value = src_value /
455 ((GST_SECOND / 10000000) * ogm->hdr.time_unit);
470 gst_object_unref (ogm);
475 gst_ogm_parse_sink_query (GstPad * pad, GstQuery * query)
477 GstOgmParse *ogm = GST_OGM_PARSE (gst_pad_get_parent (pad));
479 gboolean res = FALSE;
481 switch (GST_QUERY_TYPE (query)) {
482 case GST_QUERY_POSITION:
486 gst_query_parse_position (query, &format, NULL);
488 if (format != GST_FORMAT_DEFAULT && format != GST_FORMAT_TIME)
491 if ((res = gst_ogm_parse_sink_convert (pad,
492 GST_FORMAT_DEFAULT, ogm->next_granulepos, &format, &val))) {
493 /* don't know the total length here.. */
494 gst_query_set_position (query, format, val);
498 case GST_QUERY_CONVERT:
500 GstFormat src_fmt, dest_fmt;
501 gint64 src_val, dest_val;
504 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
505 if ((res = gst_ogm_parse_sink_convert (pad, src_fmt, src_val,
506 &dest_fmt, &dest_val))) {
507 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
512 res = gst_pad_query_default (pad, query);
516 gst_object_unref (ogm);
521 gst_ogm_parse_stream_header (GstOgmParse * ogm, const guint8 * data, guint size)
523 GstCaps *caps = NULL;
526 if (size < OGM_STREAM_HEADER_SIZE)
527 goto buffer_too_small;
529 if (!memcmp (data, "video\000\000\000", 8)) {
530 ogm->hdr.s.video.width = GST_READ_UINT32_LE (&data[44]);
531 ogm->hdr.s.video.height = GST_READ_UINT32_LE (&data[48]);
532 } else if (!memcmp (data, "audio\000\000\000", 8)) {
533 ogm->hdr.s.audio.channels = GST_READ_UINT32_LE (&data[44]);
534 ogm->hdr.s.audio.blockalign = GST_READ_UINT32_LE (&data[46]);
535 ogm->hdr.s.audio.avgbytespersec = GST_READ_UINT32_LE (&data[48]);
536 } else if (!memcmp (data, "text\000\000\000\000", 8)) {
541 memcpy (ogm->hdr.streamtype, &data[0], 8);
542 memcpy (ogm->hdr.subtype, &data[8], 4);
543 ogm->hdr.subtype[4] = '\0';
544 ogm->hdr.size = GST_READ_UINT32_LE (&data[12]);
545 ogm->hdr.time_unit = GST_READ_UINT64_LE (&data[16]);
546 ogm->hdr.samples_per_unit = GST_READ_UINT64_LE (&data[24]);
547 ogm->hdr.default_len = GST_READ_UINT32_LE (&data[32]);
548 ogm->hdr.buffersize = GST_READ_UINT32_LE (&data[36]);
549 ogm->hdr.bits_per_sample = GST_READ_UINT32_LE (&data[40]);
551 switch (ogm->hdr.streamtype[0]) {
555 if (sscanf (ogm->hdr.subtype, "%04x", &codec_id) != 1) {
556 GST_WARNING_OBJECT (ogm, "cannot parse subtype %s", ogm->hdr.subtype);
560 gst_riff_create_audio_caps (codec_id, NULL, NULL, NULL, NULL, NULL);
563 GST_WARNING_OBJECT (ogm, "no audio caps for codec %u found", codec_id);
564 caps = gst_caps_new_simple ("audio/x-ogm-unknown", "codec_id",
565 G_TYPE_INT, (gint) codec_id, NULL);
568 gst_caps_set_simple (caps,
569 "channels", G_TYPE_INT, ogm->hdr.s.audio.channels,
570 "rate", G_TYPE_INT, ogm->hdr.samples_per_unit, NULL);
572 GST_LOG_OBJECT (ogm, "Type: %s, subtype: 0x%04x, channels: %d, "
573 "samplerate: %d, blockalign: %d, bps: %d, caps = %" GST_PTR_FORMAT,
574 ogm->hdr.streamtype, codec_id, ogm->hdr.s.audio.channels,
575 (gint) ogm->hdr.samples_per_unit, ogm->hdr.s.audio.blockalign,
576 ogm->hdr.s.audio.avgbytespersec, caps);
583 fourcc = GST_MAKE_FOURCC (ogm->hdr.subtype[0],
584 ogm->hdr.subtype[1], ogm->hdr.subtype[2], ogm->hdr.subtype[3]);
586 caps = gst_riff_create_video_caps (fourcc, NULL, NULL, NULL, NULL, NULL);
589 GST_WARNING_OBJECT (ogm, "could not find video caps for fourcc %"
590 GST_FOURCC_FORMAT, GST_FOURCC_ARGS (fourcc));
591 caps = gst_caps_new_simple ("video/x-ogm-unknown", "fourcc",
592 GST_TYPE_FOURCC, fourcc, NULL);
596 GST_LOG_OBJECT (ogm, "Type: %s, subtype: %" GST_FOURCC_FORMAT
597 ", size: %dx%d, timeunit: %" G_GINT64_FORMAT
598 " (fps: %lf), s/u: %" G_GINT64_FORMAT ", "
599 "def.len: %d, bufsize: %d, bps: %d, caps = %" GST_PTR_FORMAT,
600 ogm->hdr.streamtype, GST_FOURCC_ARGS (fourcc),
601 ogm->hdr.s.video.width, ogm->hdr.s.video.height,
602 ogm->hdr.time_unit, 10000000. / ogm->hdr.time_unit,
603 ogm->hdr.samples_per_unit, ogm->hdr.default_len,
604 ogm->hdr.buffersize, ogm->hdr.bits_per_sample, caps);
606 /* GST_TYPE_FRACTION contains gint */
607 if (ogm->hdr.time_unit > G_MAXINT || ogm->hdr.time_unit < G_MININT)
608 GST_WARNING_OBJECT (ogm, "timeunit is out of range");
610 time_unit = (gint) CLAMP (ogm->hdr.time_unit, G_MININT, G_MAXINT);
611 gst_caps_set_simple (caps,
612 "width", G_TYPE_INT, ogm->hdr.s.video.width,
613 "height", G_TYPE_INT, ogm->hdr.s.video.height,
614 "framerate", GST_TYPE_FRACTION, 10000000, time_unit, NULL);
618 GST_LOG_OBJECT (ogm, "Type: %s, s/u: %" G_GINT64_FORMAT
619 ", timeunit=%" G_GINT64_FORMAT,
620 ogm->hdr.streamtype, ogm->hdr.samples_per_unit, ogm->hdr.time_unit);
621 caps = gst_caps_new_simple ("text/plain", NULL);
625 g_assert_not_reached ();
632 GstCaps *current_caps = GST_PAD_CAPS (ogm->srcpad);
634 if (current_caps && caps && !gst_caps_is_equal (current_caps, caps)) {
635 GST_WARNING_OBJECT (ogm, "Already an existing pad %s:%s",
636 GST_DEBUG_PAD_NAME (ogm->srcpad));
637 gst_pad_set_active (ogm->srcpad, FALSE);
638 gst_element_remove_pad (GST_ELEMENT (ogm), ogm->srcpad);
641 GST_DEBUG_OBJECT (ogm, "Existing pad has the same caps, do nothing");
645 if (ogm->srcpad == NULL) {
646 GList *l, *cached_events;
648 ogm->srcpad = gst_pad_new_from_template (ogm->srcpadtempl, "src");
649 gst_pad_use_fixed_caps (ogm->srcpad);
650 gst_pad_set_caps (ogm->srcpad, caps);
651 gst_pad_set_active (ogm->srcpad, TRUE);
652 gst_element_add_pad (GST_ELEMENT (ogm), ogm->srcpad);
653 GST_INFO_OBJECT (ogm, "Added pad %s:%s with caps %" GST_PTR_FORMAT,
654 GST_DEBUG_PAD_NAME (ogm->srcpad), caps);
656 GST_OBJECT_LOCK (ogm);
657 cached_events = ogm->cached_events;
658 ogm->cached_events = NULL;
659 GST_OBJECT_UNLOCK (ogm);
661 for (l = cached_events; l; l = l->next) {
662 GstEvent *event = GST_EVENT_CAST (l->data);
664 GST_DEBUG_OBJECT (ogm, "Pushing cached event %" GST_PTR_FORMAT, event);
665 gst_pad_push_event (ogm->srcpad, event);
667 g_list_free (cached_events);
672 tags = gst_tag_list_new ();
673 gst_tag_list_add (tags, GST_TAG_MERGE_APPEND, GST_TAG_SUBTITLE_CODEC,
675 gst_element_found_tags_for_pad (GST_ELEMENT (ogm), ogm->srcpad, tags);
679 gst_caps_unref (caps);
686 GST_ELEMENT_ERROR (ogm, STREAM, WRONG_TYPE, ("Buffer too small"), (NULL));
687 return GST_FLOW_ERROR;
691 GST_ELEMENT_ERROR (ogm, STREAM, DECODE, (NULL), ("unknown ogm format"));
692 return GST_FLOW_ERROR;
697 gst_ogm_parse_comment_packet (GstOgmParse * ogm, GstBuffer * buf)
701 if (ogm->srcpad == NULL) {
702 GST_DEBUG ("no source pad");
703 return GST_FLOW_WRONG_STATE;
706 /* if this is not a subtitle stream, push the vorbiscomment packet
707 * on downstream, the respective decoder will handle it; if it is
708 * a subtitle stream, we will have to handle the comment ourself */
709 if (ogm->hdr.streamtype[0] == 't') {
712 tags = gst_tag_list_from_vorbiscomment_buffer (buf,
713 (guint8 *) "\003vorbis", 7, NULL);
716 GST_DEBUG_OBJECT (ogm, "tags = %" GST_PTR_FORMAT, tags);
717 gst_element_found_tags_for_pad (GST_ELEMENT (ogm), ogm->srcpad, tags);
719 GST_DEBUG_OBJECT (ogm, "failed to extract tags from vorbis comment");
721 /* do not push packet downstream, just let parent unref it */
724 buf = gst_buffer_copy (buf);
725 gst_buffer_set_caps (buf, GST_PAD_CAPS (ogm->srcpad));
726 ret = gst_pad_push (ogm->srcpad, buf);
733 gst_ogm_text_parse_strip_trailing_zeroes (GstOgmParse * ogm, GstBuffer * buf)
738 g_assert (gst_buffer_is_metadata_writable (buf));
740 /* zeroes are not valid UTF-8 characters, so strip them from output */
741 data = GST_BUFFER_DATA (buf);
742 size = GST_BUFFER_SIZE (buf);
743 while (size > 0 && data[size - 1] == '\0') {
747 GST_BUFFER_SIZE (buf) = size;
751 gst_ogm_parse_data_packet (GstOgmParse * ogm, GstBuffer * buf)
757 guint size, len, n, xsize = 0;
759 data = GST_BUFFER_DATA (buf);
760 size = GST_BUFFER_SIZE (buf);
762 if ((data[0] & 0x01) != 0)
763 goto invalid_startcode;
766 len = ((data[0] & 0xc0) >> 6) | ((data[0] & 0x02) << 1);
767 keyframe = (((data[0] & 0x08) >> 3) != 0);
769 if ((1 + len) > size)
770 goto buffer_too_small;
772 for (n = len; n > 0; n--) {
773 xsize = (xsize << 8) | data[n];
776 GST_LOG_OBJECT (ogm, "[0x%02x] samples: %d, hdrbytes: %d, datasize: %d",
777 data[0], xsize, len, size - len - 1);
779 sbuf = gst_buffer_create_sub (buf, len + 1, size - len - 1);
781 if (GST_BUFFER_OFFSET_END_IS_VALID (buf))
782 ogm->next_granulepos = GST_BUFFER_OFFSET_END (buf);
784 switch (ogm->hdr.streamtype[0]) {
787 GstClockTime ts, next_ts;
790 samples = (ogm->hdr.streamtype[0] == 'v') ? 1 : xsize;
793 GST_BUFFER_FLAG_SET (sbuf, GST_BUFFER_FLAG_DELTA_UNIT);
796 /* shouldn't this be granulepos - samples? (tpm) */
797 ts = gst_util_uint64_scale (ogm->next_granulepos,
798 ogm->hdr.time_unit * GST_SECOND, 10000000);
799 next_ts = gst_util_uint64_scale (ogm->next_granulepos + samples,
800 ogm->hdr.time_unit * GST_SECOND, 10000000);
802 GST_BUFFER_TIMESTAMP (sbuf) = ts;
803 GST_BUFFER_DURATION (sbuf) = next_ts - ts;
805 ogm->next_granulepos += samples;
807 if (ogm->hdr.streamtype[0] == 't') {
808 gst_ogm_text_parse_strip_trailing_zeroes (ogm, sbuf);
813 GstClockTime ts, next_ts;
815 /* shouldn't this be granulepos - samples? (tpm) */
816 ts = gst_util_uint64_scale_int (ogm->next_granulepos,
817 GST_SECOND, ogm->hdr.samples_per_unit);
818 next_ts = gst_util_uint64_scale_int (ogm->next_granulepos + xsize,
819 GST_SECOND, ogm->hdr.samples_per_unit);
821 GST_BUFFER_TIMESTAMP (sbuf) = ts;
822 GST_BUFFER_DURATION (sbuf) = next_ts - ts;
824 ogm->next_granulepos += xsize;
828 g_assert_not_reached ();
833 gst_buffer_set_caps (sbuf, GST_PAD_CAPS (ogm->srcpad));
834 GST_LOG_OBJECT (ogm, "Pushing buffer with ts=%" GST_TIME_FORMAT,
835 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (sbuf)));
836 ret = gst_pad_push (ogm->srcpad, sbuf);
837 if (ret != GST_FLOW_OK) {
838 GST_DEBUG_OBJECT (ogm, "Flow on %s:%s = %s",
839 GST_DEBUG_PAD_NAME (ogm->srcpad), gst_flow_get_name (ret));
842 ret = GST_FLOW_WRONG_STATE;
850 GST_ELEMENT_ERROR (ogm, STREAM, DECODE, (NULL),
851 ("unexpected packet startcode 0x%02x", data[0]));
852 return GST_FLOW_ERROR;
856 GST_ELEMENT_ERROR (ogm, STREAM, DECODE, (NULL),
857 ("buffer too small, len+1=%u, size=%u", len + 1, size));
858 return GST_FLOW_ERROR;
863 gst_ogm_parse_chain (GstPad * pad, GstBuffer * buf)
865 GstFlowReturn ret = GST_FLOW_OK;
866 GstOgmParse *ogm = GST_OGM_PARSE (GST_PAD_PARENT (pad));
867 guint8 *data = GST_BUFFER_DATA (buf);
868 guint size = GST_BUFFER_SIZE (buf);
871 goto buffer_too_small;
873 GST_LOG_OBJECT (ogm, "Packet with start code 0x%02x", data[0]);
877 ret = gst_ogm_parse_stream_header (ogm, data + 1, size - 1);
881 ret = gst_ogm_parse_comment_packet (ogm, buf);
885 ret = gst_ogm_parse_data_packet (ogm, buf);
890 gst_buffer_unref (buf);
892 if (ret != GST_FLOW_OK) {
893 GST_DEBUG_OBJECT (ogm, "Flow: %s", gst_flow_get_name (ret));
901 GST_ELEMENT_ERROR (ogm, STREAM, DECODE, (NULL), ("buffer too small"));
902 gst_buffer_unref (buf);
903 return GST_FLOW_ERROR;
908 gst_ogm_parse_sink_event (GstPad * pad, GstEvent * event)
910 GstOgmParse *ogm = GST_OGM_PARSE (gst_pad_get_parent (pad));
913 GST_LOG_OBJECT (ogm, "processing %s event", GST_EVENT_TYPE_NAME (event));
915 GST_OBJECT_LOCK (ogm);
916 if (ogm->srcpad == NULL) {
917 ogm->cached_events = g_list_append (ogm->cached_events, event);
918 GST_OBJECT_UNLOCK (ogm);
921 GST_OBJECT_UNLOCK (ogm);
922 res = gst_pad_event_default (pad, event);
925 gst_object_unref (ogm);
929 static GstStateChangeReturn
930 gst_ogm_parse_change_state (GstElement * element, GstStateChange transition)
932 GstStateChangeReturn ret;
933 GstOgmParse *ogm = GST_OGM_PARSE (element);
935 ret = parent_class->change_state (element, transition);
936 if (ret != GST_STATE_CHANGE_SUCCESS)
939 switch (transition) {
940 case GST_STATE_CHANGE_PAUSED_TO_READY:
942 gst_pad_set_active (ogm->srcpad, FALSE);
943 gst_element_remove_pad (element, ogm->srcpad);
946 memset (&ogm->hdr, 0, sizeof (ogm->hdr));
947 ogm->next_granulepos = 0;
948 g_list_foreach (ogm->cached_events, (GFunc) gst_mini_object_unref, NULL);
949 g_list_free (ogm->cached_events);
950 ogm->cached_events = NULL;
960 gst_ogm_parse_plugin_init (GstPlugin * plugin)
964 GST_DEBUG_CATEGORY_INIT (gst_ogm_parse_debug, "ogmparse", 0, "ogm parser");
966 return gst_element_register (plugin, "ogmaudioparse", GST_RANK_PRIMARY,
967 GST_TYPE_OGM_AUDIO_PARSE) &&
968 gst_element_register (plugin, "ogmvideoparse", GST_RANK_PRIMARY,
969 GST_TYPE_OGM_VIDEO_PARSE) &&
970 gst_element_register (plugin, "ogmtextparse", GST_RANK_PRIMARY,
971 GST_TYPE_OGM_TEXT_PARSE);