2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * <2005> Wim Taymans <wim@fluendo.com>
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., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
28 #include <gst/audio/audio.h>
29 #include "gstdvdemux.h"
30 #include "gstsmptetimecode.h"
33 * SECTION:element-dvdemux
35 * dvdemux splits raw DV into its audio and video components. The audio will be
36 * decoded raw samples and the video will be encoded DV video.
38 * This element can operate in both push and pull mode depending on the
39 * capabilities of the upstream peer.
42 * <title>Example launch line</title>
44 * gst-launch-1.0 filesrc location=test.dv ! dvdemux name=demux ! queue ! audioconvert ! alsasink demux. ! queue ! dvdec ! xvimagesink
45 * ]| This pipeline decodes and renders the raw DV stream to an audio and a videosink.
49 /* DV output has two modes, normal and wide. The resolution is the same in both
50 * cases: 720 pixels wide by 576 pixels tall in PAL format, and 720x480 for
53 * Each of the modes has its own pixel aspect ratio, which is fixed in practice
54 * by ITU-R BT.601 (also known as "CCIR-601" or "Rec.601"). Or so claims a
55 * reference that I culled from the reliable "internet",
56 * http://www.mir.com/DMG/aspect.html. Normal PAL is 59/54 and normal NTSC is
57 * 10/11. Because the pixel resolution is the same for both cases, we can get
58 * the pixel aspect ratio for wide recordings by multiplying by the ratio of
59 * display aspect ratios, 16/9 (for wide) divided by 4/3 (for normal):
61 * Wide NTSC: 10/11 * (16/9)/(4/3) = 40/33
62 * Wide PAL: 59/54 * (16/9)/(4/3) = 118/81
64 * However, the pixel resolution coming out of a DV source does not combine with
65 * the standard pixel aspect ratios to give a proper display aspect ratio. An
66 * image 480 pixels tall, with a 4:3 display aspect ratio, will be 768 pixels
67 * wide. But, if we take the normal PAL aspect ratio of 59/54, and multiply it
68 * with the width of the DV image (720 pixels), we get 786.666..., which is
69 * nonintegral and too wide. The camera is not outputting a 4:3 image.
71 * If the video sink for this stream has fixed dimensions (such as for
72 * fullscreen playback, or for a java applet in a web page), you then have two
73 * choices. Either you show the whole image, but pad the image with black
74 * borders on the top and bottom (like watching a widescreen video on a 4:3
75 * device), or you crop the video to the proper ratio. Apparently the latter is
76 * the standard practice.
78 * For its part, GStreamer is concerned with accuracy and preservation of
79 * information. This element outputs the 720x576 or 720x480 video that it
80 * recieves, noting the proper aspect ratio. This should not be a problem for
81 * windowed applications, which can change size to fit the video. Applications
82 * with fixed size requirements should decide whether to crop or pad which
83 * an element such as videobox can do.
86 #define NTSC_HEIGHT 480
87 #define NTSC_BUFFER 120000
88 #define NTSC_FRAMERATE_NUMERATOR 30000
89 #define NTSC_FRAMERATE_DENOMINATOR 1001
91 #define PAL_HEIGHT 576
92 #define PAL_BUFFER 144000
93 #define PAL_FRAMERATE_NUMERATOR 25
94 #define PAL_FRAMERATE_DENOMINATOR 1
96 #define PAL_NORMAL_PAR_X 16
97 #define PAL_NORMAL_PAR_Y 15
98 #define PAL_WIDE_PAR_X 64
99 #define PAL_WIDE_PAR_Y 45
101 #define NTSC_NORMAL_PAR_X 8
102 #define NTSC_NORMAL_PAR_Y 9
103 #define NTSC_WIDE_PAR_X 32
104 #define NTSC_WIDE_PAR_Y 27
106 GST_DEBUG_CATEGORY_STATIC (dvdemux_debug);
107 #define GST_CAT_DEFAULT dvdemux_debug
109 static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
112 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true")
115 static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video",
118 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) false")
121 static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
124 GST_STATIC_CAPS ("audio/x-raw, "
125 "format = (string) " GST_AUDIO_NE (S16) ", "
126 "layout = (string) interleaved, "
127 "rate = (int) { 32000, 44100, 48000 }, " "channels = (int) {2, 4}")
131 #define gst_dvdemux_parent_class parent_class
132 G_DEFINE_TYPE (GstDVDemux, gst_dvdemux, GST_TYPE_ELEMENT);
134 static void gst_dvdemux_finalize (GObject * object);
136 /* query functions */
137 static gboolean gst_dvdemux_src_query (GstPad * pad, GstObject * parent,
139 static gboolean gst_dvdemux_sink_query (GstPad * pad, GstObject * parent,
142 /* convert functions */
143 static gboolean gst_dvdemux_sink_convert (GstDVDemux * demux,
144 GstFormat src_format, gint64 src_value, GstFormat dest_format,
145 gint64 * dest_value);
146 static gboolean gst_dvdemux_src_convert (GstDVDemux * demux, GstPad * pad,
147 GstFormat src_format, gint64 src_value, GstFormat dest_format,
148 gint64 * dest_value);
150 /* event functions */
151 static gboolean gst_dvdemux_send_event (GstElement * element, GstEvent * event);
152 static gboolean gst_dvdemux_handle_src_event (GstPad * pad, GstObject * parent,
154 static gboolean gst_dvdemux_handle_sink_event (GstPad * pad, GstObject * parent,
157 /* scheduling functions */
158 static void gst_dvdemux_loop (GstPad * pad);
159 static GstFlowReturn gst_dvdemux_flush (GstDVDemux * dvdemux);
160 static GstFlowReturn gst_dvdemux_chain (GstPad * pad, GstObject * parent,
163 /* state change functions */
164 static gboolean gst_dvdemux_sink_activate (GstPad * sinkpad,
166 static gboolean gst_dvdemux_sink_activate_mode (GstPad * sinkpad,
167 GstObject * parent, GstPadMode mode, gboolean active);
168 static GstStateChangeReturn gst_dvdemux_change_state (GstElement * element,
169 GstStateChange transition);
172 gst_dvdemux_class_init (GstDVDemuxClass * klass)
174 GObjectClass *gobject_class;
175 GstElementClass *gstelement_class;
177 gobject_class = (GObjectClass *) klass;
178 gstelement_class = (GstElementClass *) klass;
180 gobject_class->finalize = gst_dvdemux_finalize;
182 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_dvdemux_change_state);
183 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_dvdemux_send_event);
185 gst_element_class_add_static_pad_template (gstelement_class, &sink_temp);
186 gst_element_class_add_static_pad_template (gstelement_class, &video_src_temp);
187 gst_element_class_add_static_pad_template (gstelement_class, &audio_src_temp);
189 gst_element_class_set_static_metadata (gstelement_class,
190 "DV system stream demuxer", "Codec/Demuxer",
191 "Uses libdv to separate DV audio from DV video (libdv.sourceforge.net)",
192 "Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim@fluendo.com>");
194 GST_DEBUG_CATEGORY_INIT (dvdemux_debug, "dvdemux", 0, "DV demuxer element");
198 gst_dvdemux_init (GstDVDemux * dvdemux)
202 dvdemux->sinkpad = gst_pad_new_from_static_template (&sink_temp, "sink");
203 /* we can operate in pull and push mode so we install
204 * a custom activate function */
205 gst_pad_set_activate_function (dvdemux->sinkpad,
206 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate));
207 /* the function to activate in push mode */
208 gst_pad_set_activatemode_function (dvdemux->sinkpad,
209 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate_mode));
210 /* for push mode, this is the chain function */
211 gst_pad_set_chain_function (dvdemux->sinkpad,
212 GST_DEBUG_FUNCPTR (gst_dvdemux_chain));
213 /* handling events (in push mode only) */
214 gst_pad_set_event_function (dvdemux->sinkpad,
215 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_sink_event));
216 /* query functions */
217 gst_pad_set_query_function (dvdemux->sinkpad,
218 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_query));
220 /* now add the pad */
221 gst_element_add_pad (GST_ELEMENT (dvdemux), dvdemux->sinkpad);
223 dvdemux->adapter = gst_adapter_new ();
225 /* we need 4 temp buffers for audio decoding which are of a static
226 * size and which we can allocate here */
227 for (i = 0; i < 4; i++) {
228 dvdemux->audio_buffers[i] =
229 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
234 gst_dvdemux_finalize (GObject * object)
239 dvdemux = GST_DVDEMUX (object);
241 g_object_unref (dvdemux->adapter);
243 /* clean up temp audio buffers */
244 for (i = 0; i < 4; i++) {
245 g_free (dvdemux->audio_buffers[i]);
248 G_OBJECT_CLASS (parent_class)->finalize (object);
251 /* reset to default values before starting streaming */
253 gst_dvdemux_reset (GstDVDemux * dvdemux)
255 dvdemux->frame_offset = 0;
256 dvdemux->audio_offset = 0;
257 dvdemux->video_offset = 0;
258 g_atomic_int_set (&dvdemux->found_header, 0);
259 dvdemux->frame_len = -1;
260 dvdemux->need_segment = FALSE;
261 dvdemux->new_media = FALSE;
262 dvdemux->framerate_numerator = 0;
263 dvdemux->framerate_denominator = 0;
265 dvdemux->frequency = 0;
266 dvdemux->channels = 0;
267 dvdemux->wide = FALSE;
268 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
269 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
270 dvdemux->have_group_id = FALSE;
271 dvdemux->group_id = G_MAXUINT;
275 have_group_id (GstDVDemux * demux)
279 event = gst_pad_get_sticky_event (demux->sinkpad, GST_EVENT_STREAM_START, 0);
281 if (gst_event_parse_group_id (event, &demux->group_id))
282 demux->have_group_id = TRUE;
284 demux->have_group_id = FALSE;
285 gst_event_unref (event);
286 } else if (!demux->have_group_id) {
287 demux->have_group_id = TRUE;
288 demux->group_id = gst_util_group_id_next ();
291 return demux->have_group_id;
295 gst_dvdemux_add_pad (GstDVDemux * dvdemux, GstStaticPadTemplate * template,
298 gboolean no_more_pads;
302 gchar rec_datetime[40];
305 pad = gst_pad_new_from_static_template (template, template->name_template);
307 gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_dvdemux_src_query));
309 gst_pad_set_event_function (pad,
310 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_src_event));
311 gst_pad_use_fixed_caps (pad);
312 gst_pad_set_active (pad, TRUE);
315 gst_pad_create_stream_id (pad,
316 GST_ELEMENT_CAST (dvdemux),
317 template == &video_src_temp ? "video" : "audio");
318 event = gst_event_new_stream_start (stream_id);
319 if (have_group_id (dvdemux))
320 gst_event_set_group_id (event, dvdemux->group_id);
321 gst_pad_push_event (pad, event);
324 gst_pad_set_caps (pad, caps);
326 gst_pad_push_event (pad, gst_event_new_segment (&dvdemux->time_segment));
328 gst_element_add_pad (GST_ELEMENT (dvdemux), pad);
331 (dvdemux->videosrcpad != NULL && template == &audio_src_temp) ||
332 (dvdemux->audiosrcpad != NULL && template == &video_src_temp);
335 gst_element_no_more_pads (GST_ELEMENT (dvdemux));
340 tags = gst_tag_list_new (GST_TAG_CONTAINER_FORMAT, "DV", NULL);
341 gst_tag_list_set_scope (tags, GST_TAG_SCOPE_GLOBAL);
343 if (dv_get_recording_datetime (dvdemux->decoder, rec_datetime)) {
344 rec_dt = gst_date_time_new_from_iso8601_string (rec_datetime);
346 gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE, GST_TAG_DATE_TIME,
348 gst_date_time_unref (rec_dt);
352 if (dvdemux->videosrcpad)
353 gst_pad_push_event (dvdemux->videosrcpad,
354 gst_event_new_tag (gst_tag_list_ref (tags)));
355 if (dvdemux->audiosrcpad)
356 gst_pad_push_event (dvdemux->audiosrcpad,
357 gst_event_new_tag (gst_tag_list_ref (tags)));
358 gst_tag_list_unref (tags);
365 gst_dvdemux_remove_pads (GstDVDemux * dvdemux)
367 if (dvdemux->videosrcpad) {
368 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->videosrcpad);
369 dvdemux->videosrcpad = NULL;
371 if (dvdemux->audiosrcpad) {
372 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->audiosrcpad);
373 dvdemux->audiosrcpad = NULL;
378 gst_dvdemux_src_convert (GstDVDemux * dvdemux, GstPad * pad,
379 GstFormat src_format, gint64 src_value, GstFormat dest_format,
384 if (dest_format == src_format || src_value == -1) {
385 *dest_value = src_value;
389 if (dvdemux->frame_len <= 0)
392 if (dvdemux->decoder == NULL)
395 GST_INFO_OBJECT (pad,
396 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
397 src_value, src_format, dest_format);
399 switch (src_format) {
400 case GST_FORMAT_BYTES:
401 switch (dest_format) {
402 case GST_FORMAT_DEFAULT:
403 if (pad == dvdemux->videosrcpad)
404 *dest_value = src_value / dvdemux->frame_len;
405 else if (pad == dvdemux->audiosrcpad)
406 *dest_value = src_value / (2 * dvdemux->channels);
408 case GST_FORMAT_TIME:
409 if (pad == dvdemux->videosrcpad)
410 *dest_value = gst_util_uint64_scale (src_value,
411 GST_SECOND * dvdemux->framerate_denominator,
412 dvdemux->frame_len * dvdemux->framerate_numerator);
413 else if (pad == dvdemux->audiosrcpad)
414 *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND,
415 2 * dvdemux->frequency * dvdemux->channels);
421 case GST_FORMAT_TIME:
422 switch (dest_format) {
423 case GST_FORMAT_BYTES:
424 if (pad == dvdemux->videosrcpad)
425 *dest_value = gst_util_uint64_scale (src_value,
426 dvdemux->frame_len * dvdemux->framerate_numerator,
427 dvdemux->framerate_denominator * GST_SECOND);
428 else if (pad == dvdemux->audiosrcpad)
429 *dest_value = gst_util_uint64_scale_int (src_value,
430 2 * dvdemux->frequency * dvdemux->channels, GST_SECOND);
432 case GST_FORMAT_DEFAULT:
433 if (pad == dvdemux->videosrcpad) {
435 *dest_value = gst_util_uint64_scale (src_value,
436 dvdemux->framerate_numerator,
437 dvdemux->framerate_denominator * GST_SECOND);
440 } else if (pad == dvdemux->audiosrcpad) {
441 *dest_value = gst_util_uint64_scale (src_value,
442 dvdemux->frequency, GST_SECOND);
449 case GST_FORMAT_DEFAULT:
450 switch (dest_format) {
451 case GST_FORMAT_TIME:
452 if (pad == dvdemux->videosrcpad) {
453 *dest_value = gst_util_uint64_scale (src_value,
454 GST_SECOND * dvdemux->framerate_denominator,
455 dvdemux->framerate_numerator);
456 } else if (pad == dvdemux->audiosrcpad) {
458 *dest_value = gst_util_uint64_scale (src_value,
459 GST_SECOND, dvdemux->frequency);
464 case GST_FORMAT_BYTES:
465 if (pad == dvdemux->videosrcpad) {
466 *dest_value = src_value * dvdemux->frame_len;
467 } else if (pad == dvdemux->audiosrcpad) {
468 *dest_value = src_value * 2 * dvdemux->channels;
480 GST_INFO_OBJECT (pad,
481 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
482 dest_format, *dest_value, res);
488 GST_INFO ("source conversion failed");
494 gst_dvdemux_sink_convert (GstDVDemux * dvdemux, GstFormat src_format,
495 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
499 GST_DEBUG_OBJECT (dvdemux, "%d -> %d", src_format, dest_format);
500 GST_INFO_OBJECT (dvdemux,
501 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
502 src_value, src_format, dest_format);
504 if (dest_format == src_format || src_value == -1) {
505 *dest_value = src_value;
509 if (dvdemux->frame_len <= 0)
512 switch (src_format) {
513 case GST_FORMAT_BYTES:
514 switch (dest_format) {
515 case GST_FORMAT_TIME:
519 /* get frame number, rounds down so don't combine this
520 * line and the next line. */
521 frame = src_value / dvdemux->frame_len;
523 *dest_value = gst_util_uint64_scale (frame,
524 GST_SECOND * dvdemux->framerate_denominator,
525 dvdemux->framerate_numerator);
532 case GST_FORMAT_TIME:
533 switch (dest_format) {
534 case GST_FORMAT_BYTES:
538 /* calculate the frame */
540 gst_util_uint64_scale (src_value, dvdemux->framerate_numerator,
541 dvdemux->framerate_denominator * GST_SECOND);
543 /* calculate the offset from the rounded frame */
544 *dest_value = frame * dvdemux->frame_len;
554 GST_INFO_OBJECT (dvdemux,
555 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
556 dest_format, *dest_value, res);
563 GST_INFO_OBJECT (dvdemux, "sink conversion failed");
569 gst_dvdemux_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
574 dvdemux = GST_DVDEMUX (parent);
576 switch (GST_QUERY_TYPE (query)) {
577 case GST_QUERY_POSITION:
582 /* get target format */
583 gst_query_parse_position (query, &format, NULL);
585 /* bring the position to the requested format. */
586 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
587 GST_FORMAT_TIME, dvdemux->time_segment.position,
590 gst_query_set_position (query, format, cur);
593 case GST_QUERY_DURATION:
599 /* First ask the peer in the original format */
600 if (!gst_pad_peer_query (dvdemux->sinkpad, query)) {
601 /* get target format */
602 gst_query_parse_duration (query, &format, NULL);
604 /* Now ask the peer in BYTES format and try to convert */
605 pquery = gst_query_new_duration (GST_FORMAT_BYTES);
606 if (!gst_pad_peer_query (dvdemux->sinkpad, pquery)) {
607 gst_query_unref (pquery);
611 /* get peer total length */
612 gst_query_parse_duration (pquery, NULL, &end);
613 gst_query_unref (pquery);
615 /* convert end to requested format */
617 if (!(res = gst_dvdemux_sink_convert (dvdemux,
618 GST_FORMAT_BYTES, end, format, &end))) {
621 gst_query_set_duration (query, format, end);
626 case GST_QUERY_CONVERT:
628 GstFormat src_fmt, dest_fmt;
629 gint64 src_val, dest_val;
631 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
633 gst_dvdemux_src_convert (dvdemux, pad, src_fmt, src_val,
634 dest_fmt, &dest_val)))
636 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
640 res = gst_pad_query_default (pad, parent, query);
649 GST_DEBUG ("error source query");
655 gst_dvdemux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
660 dvdemux = GST_DVDEMUX (parent);
662 switch (GST_QUERY_TYPE (query)) {
663 case GST_QUERY_CONVERT:
665 GstFormat src_fmt, dest_fmt;
666 gint64 src_val, dest_val;
668 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
670 gst_dvdemux_sink_convert (dvdemux, src_fmt, src_val, dest_fmt,
673 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
677 res = gst_pad_query_default (pad, parent, query);
686 GST_DEBUG ("error handling sink query");
691 /* takes ownership of the event */
693 gst_dvdemux_push_event (GstDVDemux * dvdemux, GstEvent * event)
695 gboolean res = FALSE;
697 if (dvdemux->videosrcpad) {
698 gst_event_ref (event);
699 res |= gst_pad_push_event (dvdemux->videosrcpad, event);
702 if (dvdemux->audiosrcpad)
703 res |= gst_pad_push_event (dvdemux->audiosrcpad, event);
705 gst_event_unref (event);
713 gst_dvdemux_handle_sink_event (GstPad * pad, GstObject * parent,
716 GstDVDemux *dvdemux = GST_DVDEMUX (parent);
719 switch (GST_EVENT_TYPE (event)) {
720 case GST_EVENT_FLUSH_START:
721 /* we are not blocking on anything exect the push() calls
722 * to the peer which will be unblocked by forwarding the
724 res = gst_dvdemux_push_event (dvdemux, event);
726 case GST_EVENT_FLUSH_STOP:
727 gst_adapter_clear (dvdemux->adapter);
728 GST_DEBUG ("cleared adapter");
729 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
730 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
731 res = gst_dvdemux_push_event (dvdemux, event);
733 case GST_EVENT_SEGMENT:
735 const GstSegment *segment;
737 gst_event_parse_segment (event, &segment);
738 switch (segment->format) {
739 case GST_FORMAT_BYTES:
740 gst_segment_copy_into (segment, &dvdemux->byte_segment);
741 dvdemux->need_segment = TRUE;
742 gst_event_unref (event);
744 case GST_FORMAT_TIME:
745 gst_segment_copy_into (segment, &dvdemux->time_segment);
747 /* and we can just forward this time event */
748 res = gst_dvdemux_push_event (dvdemux, event);
751 gst_event_unref (event);
752 /* cannot accept this format */
759 /* flush any pending data, should be nothing left. */
760 gst_dvdemux_flush (dvdemux);
762 res = gst_dvdemux_push_event (dvdemux, event);
763 /* and clear the adapter */
764 gst_adapter_clear (dvdemux->adapter);
767 gst_event_unref (event);
770 res = gst_dvdemux_push_event (dvdemux, event);
777 /* convert a pair of values on the given srcpad */
779 gst_dvdemux_convert_src_pair (GstDVDemux * dvdemux, GstPad * pad,
780 GstFormat src_format, gint64 src_start, gint64 src_stop,
781 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
785 GST_INFO ("starting conversion of start");
786 /* bring the format to time on srcpad. */
787 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
788 src_format, src_start, dst_format, dst_start))) {
791 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
793 GST_INFO ("starting conversion of stop");
794 /* bring the format to time on srcpad. */
795 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
796 src_format, src_stop, dst_format, dst_stop))) {
797 /* could not convert seek format to time offset */
800 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
805 /* convert a pair of values on the sinkpad */
807 gst_dvdemux_convert_sink_pair (GstDVDemux * dvdemux,
808 GstFormat src_format, gint64 src_start, gint64 src_stop,
809 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
813 GST_INFO ("starting conversion of start");
814 /* bring the format to time on srcpad. */
815 if (!(res = gst_dvdemux_sink_convert (dvdemux,
816 src_format, src_start, dst_format, dst_start))) {
819 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
821 GST_INFO ("starting conversion of stop");
822 /* bring the format to time on srcpad. */
823 if (!(res = gst_dvdemux_sink_convert (dvdemux,
824 src_format, src_stop, dst_format, dst_stop))) {
825 /* could not convert seek format to time offset */
828 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
833 /* convert a pair of values on the srcpad to a pair of
834 * values on the sinkpad
837 gst_dvdemux_convert_src_to_sink (GstDVDemux * dvdemux, GstPad * pad,
838 GstFormat src_format, gint64 src_start, gint64 src_stop,
839 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
844 conv = GST_FORMAT_TIME;
845 /* convert to TIME intermediate format */
846 if (!(res = gst_dvdemux_convert_src_pair (dvdemux, pad,
847 src_format, src_start, src_stop, conv, dst_start, dst_stop))) {
848 /* could not convert format to time offset */
851 /* convert to dst format on sinkpad */
852 if (!(res = gst_dvdemux_convert_sink_pair (dvdemux,
853 conv, *dst_start, *dst_stop, dst_format, dst_start, dst_stop))) {
854 /* could not convert format to time offset */
863 gst_dvdemux_convert_segment (GstDVDemux * dvdemux, GstSegment * src,
866 dest->rate = src->rate;
867 dest->abs_rate = src->abs_rate;
868 dest->flags = src->flags;
874 /* handle seek in push base mode.
876 * Convert the time seek to a bytes seek and send it
878 * Does not take ownership of the event.
881 gst_dvdemux_handle_push_seek (GstDVDemux * dvdemux, GstPad * pad,
884 gboolean res = FALSE;
888 GstSeekType cur_type, stop_type;
890 gint64 start_position, end_position;
893 gst_event_parse_seek (event, &rate, &format, &flags,
894 &cur_type, &cur, &stop_type, &stop);
896 /* First try if upstream can handle time based seeks */
897 if (format == GST_FORMAT_TIME)
898 res = gst_pad_push_event (dvdemux->sinkpad, gst_event_ref (event));
901 /* we convert the start/stop on the srcpad to the byte format
902 * on the sinkpad and forward the event */
903 res = gst_dvdemux_convert_src_to_sink (dvdemux, pad,
904 format, cur, stop, GST_FORMAT_BYTES, &start_position, &end_position);
908 /* now this is the updated seek event on bytes */
909 newevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
910 cur_type, start_position, stop_type, end_position);
912 res = gst_pad_push_event (dvdemux->sinkpad, newevent);
918 /* position ourselves to the configured segment, used in pull mode.
919 * The input segment is in TIME format. We convert the time values
920 * to bytes values into our byte_segment which we use to pull data from
924 gst_dvdemux_do_seek (GstDVDemux * demux, GstSegment * segment)
929 /* position to value configured is last_stop, this will round down
930 * to the byte position where the frame containing the given
931 * timestamp can be found. */
932 format = GST_FORMAT_BYTES;
933 res = gst_dvdemux_sink_convert (demux,
934 segment->format, segment->position,
935 format, (gint64 *) & demux->byte_segment.position);
939 /* update byte segment start */
940 gst_dvdemux_sink_convert (demux,
941 segment->format, segment->start, format,
942 (gint64 *) & demux->byte_segment.start);
944 /* update byte segment stop */
945 gst_dvdemux_sink_convert (demux,
946 segment->format, segment->stop, format,
947 (gint64 *) & demux->byte_segment.stop);
949 /* update byte segment time */
950 gst_dvdemux_sink_convert (demux,
951 segment->format, segment->time, format,
952 (gint64 *) & demux->byte_segment.time);
954 /* calculate current frame number */
955 format = GST_FORMAT_DEFAULT;
956 gst_dvdemux_src_convert (demux, demux->videosrcpad,
957 segment->format, segment->start, format, &demux->video_offset);
959 /* calculate current audio number */
960 format = GST_FORMAT_DEFAULT;
961 gst_dvdemux_src_convert (demux, demux->audiosrcpad,
962 segment->format, segment->start, format, &demux->audio_offset);
964 /* every DV frame corresponts with one video frame */
965 demux->frame_offset = demux->video_offset;
971 /* handle seek in pull base mode.
973 * Does not take ownership of the event.
976 gst_dvdemux_handle_pull_seek (GstDVDemux * demux, GstPad * pad,
983 GstSeekType cur_type, stop_type;
987 GstSegment seeksegment;
989 GST_DEBUG_OBJECT (demux, "doing seek");
991 /* first bring the event format to TIME, our native format
992 * to perform the seek on */
996 gst_event_parse_seek (event, &rate, &format, &flags,
997 &cur_type, &cur, &stop_type, &stop);
999 /* can't seek backwards yet */
1003 /* convert input format to TIME */
1004 conv = GST_FORMAT_TIME;
1005 if (!(gst_dvdemux_convert_src_pair (demux, pad,
1006 format, cur, stop, conv, &cur, &stop)))
1009 format = GST_FORMAT_TIME;
1014 flush = flags & GST_SEEK_FLAG_FLUSH;
1016 /* send flush start */
1018 gst_dvdemux_push_event (demux, gst_event_new_flush_start ());
1020 gst_pad_pause_task (demux->sinkpad);
1022 /* grab streaming lock, this should eventually be possible, either
1023 * because the task is paused or our streaming thread stopped
1024 * because our peer is flushing. */
1025 GST_PAD_STREAM_LOCK (demux->sinkpad);
1027 /* make copy into temp structure, we can only update the main one
1028 * when the subclass actually could to the seek. */
1029 memcpy (&seeksegment, &demux->time_segment, sizeof (GstSegment));
1031 /* now configure the seek segment */
1033 gst_segment_do_seek (&seeksegment, rate, format, flags,
1034 cur_type, cur, stop_type, stop, &update);
1037 GST_DEBUG_OBJECT (demux, "segment configured from %" G_GINT64_FORMAT
1038 " to %" G_GINT64_FORMAT ", position %" G_GINT64_FORMAT,
1039 seeksegment.start, seeksegment.stop, seeksegment.position);
1041 /* do the seek, segment.position contains new position. */
1042 res = gst_dvdemux_do_seek (demux, &seeksegment);
1044 /* and prepare to continue streaming */
1046 /* send flush stop, peer will accept data and events again. We
1047 * are not yet providing data as we still have the STREAM_LOCK. */
1048 gst_dvdemux_push_event (demux, gst_event_new_flush_stop (TRUE));
1051 /* if successfull seek, we update our real segment and push
1052 * out the new segment. */
1054 memcpy (&demux->time_segment, &seeksegment, sizeof (GstSegment));
1056 if (demux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1057 gst_element_post_message (GST_ELEMENT_CAST (demux),
1058 gst_message_new_segment_start (GST_OBJECT_CAST (demux),
1059 demux->time_segment.format, demux->time_segment.position));
1061 if ((stop = demux->time_segment.stop) == -1)
1062 stop = demux->time_segment.duration;
1064 GST_INFO_OBJECT (demux,
1065 "Saving newsegment event to be sent in streaming thread");
1067 if (demux->pending_segment)
1068 gst_event_unref (demux->pending_segment);
1070 demux->pending_segment = gst_event_new_segment (&demux->time_segment);
1072 demux->need_segment = FALSE;
1075 /* and restart the task in case it got paused explicitely or by
1076 * the FLUSH_START event we pushed out. */
1077 gst_pad_start_task (demux->sinkpad, (GstTaskFunction) gst_dvdemux_loop,
1078 demux->sinkpad, NULL);
1080 /* and release the lock again so we can continue streaming */
1081 GST_PAD_STREAM_UNLOCK (demux->sinkpad);
1088 GST_DEBUG_OBJECT (demux, "negative playback rate %lf not supported.", rate);
1093 GST_DEBUG_OBJECT (demux, "cannot convert to TIME format, seek aborted.");
1099 gst_dvdemux_send_event (GstElement * element, GstEvent * event)
1101 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1102 gboolean res = FALSE;
1104 switch (GST_EVENT_TYPE (event)) {
1105 case GST_EVENT_SEEK:
1107 /* checking header and configuring the seek must be atomic */
1108 GST_OBJECT_LOCK (dvdemux);
1109 if (g_atomic_int_get (&dvdemux->found_header) == 0) {
1112 event_p = &dvdemux->seek_event;
1114 /* We don't have pads yet. Keep the event. */
1115 GST_INFO_OBJECT (dvdemux, "Keeping the seek event for later");
1117 gst_event_replace (event_p, event);
1118 GST_OBJECT_UNLOCK (dvdemux);
1122 GST_OBJECT_UNLOCK (dvdemux);
1124 if (dvdemux->seek_handler) {
1125 res = dvdemux->seek_handler (dvdemux, dvdemux->videosrcpad, event);
1126 gst_event_unref (event);
1132 res = GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
1139 /* handle an event on the source pad, it's most likely a seek */
1141 gst_dvdemux_handle_src_event (GstPad * pad, GstObject * parent,
1144 gboolean res = TRUE;
1145 GstDVDemux *dvdemux;
1147 dvdemux = GST_DVDEMUX (parent);
1149 switch (GST_EVENT_TYPE (event)) {
1150 case GST_EVENT_SEEK:
1151 /* seek handler is installed based on scheduling mode */
1152 if (dvdemux->seek_handler)
1153 res = dvdemux->seek_handler (dvdemux, pad, event);
1158 /* we can't really (yet) do QoS */
1161 case GST_EVENT_NAVIGATION:
1162 case GST_EVENT_CAPS:
1163 /* no navigation or caps either... */
1167 res = gst_pad_push_event (dvdemux->sinkpad, event);
1172 gst_event_unref (event);
1177 /* does not take ownership of buffer */
1178 static GstFlowReturn
1179 gst_dvdemux_demux_audio (GstDVDemux * dvdemux, GstBuffer * buffer,
1186 gst_buffer_map (buffer, &map, GST_MAP_READ);
1187 dv_decode_full_audio (dvdemux->decoder, map.data, dvdemux->audio_buffers);
1188 gst_buffer_unmap (buffer, &map);
1190 if (G_LIKELY ((num_samples = dv_get_num_samples (dvdemux->decoder)) > 0)) {
1194 gint frequency, channels;
1196 /* get initial format or check if format changed */
1197 frequency = dv_get_frequency (dvdemux->decoder);
1198 channels = dv_get_num_channels (dvdemux->decoder);
1200 if (G_UNLIKELY ((dvdemux->audiosrcpad == NULL)
1201 || (frequency != dvdemux->frequency)
1202 || (channels != dvdemux->channels))) {
1206 dvdemux->frequency = frequency;
1207 dvdemux->channels = channels;
1209 gst_audio_info_init (&info);
1210 gst_audio_info_set_format (&info, GST_AUDIO_FORMAT_S16LE,
1211 frequency, channels, NULL);
1212 caps = gst_audio_info_to_caps (&info);
1213 if (G_UNLIKELY (dvdemux->audiosrcpad == NULL)) {
1214 dvdemux->audiosrcpad =
1215 gst_dvdemux_add_pad (dvdemux, &audio_src_temp, caps);
1217 gst_pad_set_caps (dvdemux->audiosrcpad, caps);
1219 gst_caps_unref (caps);
1222 outbuf = gst_buffer_new_and_alloc (num_samples *
1223 sizeof (gint16) * dvdemux->channels);
1225 gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
1226 a_ptr = (gint16 *) map.data;
1228 for (i = 0; i < num_samples; i++) {
1229 for (j = 0; j < dvdemux->channels; j++) {
1230 *(a_ptr++) = dvdemux->audio_buffers[j][i];
1233 gst_buffer_unmap (outbuf, &map);
1235 GST_DEBUG ("pushing audio %" GST_TIME_FORMAT,
1236 GST_TIME_ARGS (dvdemux->time_segment.position));
1238 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.position;
1239 GST_BUFFER_DURATION (outbuf) = duration;
1240 GST_BUFFER_OFFSET (outbuf) = dvdemux->audio_offset;
1241 dvdemux->audio_offset += num_samples;
1242 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->audio_offset;
1244 if (dvdemux->new_media)
1245 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1247 ret = gst_pad_push (dvdemux->audiosrcpad, outbuf);
1256 /* takes ownership of buffer */
1257 static GstFlowReturn
1258 gst_dvdemux_demux_video (GstDVDemux * dvdemux, GstBuffer * buffer,
1264 GstFlowReturn ret = GST_FLOW_OK;
1267 /* framerate is already up-to-date */
1268 height = dvdemux->decoder->height;
1269 wide = dv_format_wide (dvdemux->decoder);
1271 /* see if anything changed */
1272 if (G_UNLIKELY ((dvdemux->videosrcpad == NULL) || (dvdemux->height != height)
1273 || dvdemux->wide != wide)) {
1277 dvdemux->height = height;
1278 dvdemux->wide = wide;
1280 if (dvdemux->decoder->system == e_dv_system_625_50) {
1282 par_x = PAL_WIDE_PAR_X;
1283 par_y = PAL_WIDE_PAR_Y;
1285 par_x = PAL_NORMAL_PAR_X;
1286 par_y = PAL_NORMAL_PAR_Y;
1290 par_x = NTSC_WIDE_PAR_X;
1291 par_y = NTSC_WIDE_PAR_Y;
1293 par_x = NTSC_NORMAL_PAR_X;
1294 par_y = NTSC_NORMAL_PAR_Y;
1298 caps = gst_caps_new_simple ("video/x-dv",
1299 "systemstream", G_TYPE_BOOLEAN, FALSE,
1300 "width", G_TYPE_INT, 720,
1301 "height", G_TYPE_INT, height,
1302 "framerate", GST_TYPE_FRACTION, dvdemux->framerate_numerator,
1303 dvdemux->framerate_denominator,
1304 "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
1306 if (G_UNLIKELY (dvdemux->videosrcpad == NULL)) {
1307 dvdemux->videosrcpad =
1308 gst_dvdemux_add_pad (dvdemux, &video_src_temp, caps);
1310 gst_pad_set_caps (dvdemux->videosrcpad, caps);
1312 gst_caps_unref (caps);
1315 /* takes ownership of buffer here, we just need to modify
1317 outbuf = gst_buffer_make_writable (buffer);
1319 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.position;
1320 GST_BUFFER_OFFSET (outbuf) = dvdemux->video_offset;
1321 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->video_offset + 1;
1322 GST_BUFFER_DURATION (outbuf) = duration;
1324 if (dvdemux->new_media)
1325 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1327 GST_DEBUG ("pushing video %" GST_TIME_FORMAT,
1328 GST_TIME_ARGS (dvdemux->time_segment.position));
1330 ret = gst_pad_push (dvdemux->videosrcpad, outbuf);
1332 dvdemux->video_offset++;
1338 get_ssyb_offset (int dif, int ssyb)
1342 offset = dif * 12000; /* to dif */
1343 offset += 80 * (1 + (ssyb / 6)); /* to subcode pack */
1344 offset += 3; /* past header */
1345 offset += 8 * (ssyb % 6); /* to ssyb */
1351 gst_dvdemux_get_timecode (GstDVDemux * dvdemux, GstBuffer * buffer,
1352 GstSMPTETimeCode * timecode)
1358 int n_difs = dvdemux->decoder->num_dif_seqs;
1360 gst_buffer_map (buffer, &map, GST_MAP_READ);
1362 for (dif = 0; dif < n_difs; dif++) {
1363 offset = get_ssyb_offset (dif, 3);
1364 if (data[offset + 3] == 0x13) {
1365 timecode->frames = ((data[offset + 4] >> 4) & 0x3) * 10 +
1366 (data[offset + 4] & 0xf);
1367 timecode->seconds = ((data[offset + 5] >> 4) & 0x3) * 10 +
1368 (data[offset + 5] & 0xf);
1369 timecode->minutes = ((data[offset + 6] >> 4) & 0x3) * 10 +
1370 (data[offset + 6] & 0xf);
1371 timecode->hours = ((data[offset + 7] >> 4) & 0x3) * 10 +
1372 (data[offset + 7] & 0xf);
1373 GST_DEBUG ("got timecode %" GST_SMPTE_TIME_CODE_FORMAT,
1374 GST_SMPTE_TIME_CODE_ARGS (timecode));
1375 gst_buffer_unmap (buffer, &map);
1380 gst_buffer_unmap (buffer, &map);
1385 gst_dvdemux_is_new_media (GstDVDemux * dvdemux, GstBuffer * buffer)
1393 n_difs = dvdemux->decoder->num_dif_seqs;
1395 gst_buffer_map (buffer, &map, GST_MAP_READ);
1397 for (dif = 0; dif < n_difs; dif++) {
1399 aaux_offset = (dif * 12000) + (6 + 16 * 1) * 80 + 3;
1401 aaux_offset = (dif * 12000) + (6 + 16 * 4) * 80 + 3;
1403 if (data[aaux_offset + 0] == 0x51) {
1404 if ((data[aaux_offset + 2] & 0x80) == 0) {
1405 gst_buffer_unmap (buffer, &map);
1411 gst_buffer_unmap (buffer, &map);
1415 /* takes ownership of buffer */
1416 static GstFlowReturn
1417 gst_dvdemux_demux_frame (GstDVDemux * dvdemux, GstBuffer * buffer)
1419 GstClockTime next_ts;
1420 GstFlowReturn aret, vret, ret;
1423 GstSMPTETimeCode timecode;
1426 if (G_UNLIKELY (dvdemux->need_segment)) {
1429 /* convert to time and store as start/end_timestamp */
1430 format = GST_FORMAT_TIME;
1431 if (!(gst_dvdemux_convert_sink_pair (dvdemux,
1432 GST_FORMAT_BYTES, dvdemux->byte_segment.start,
1433 dvdemux->byte_segment.stop, format,
1434 (gint64 *) & dvdemux->time_segment.start,
1435 (gint64 *) & dvdemux->time_segment.stop)))
1438 dvdemux->time_segment.rate = dvdemux->byte_segment.rate;
1439 dvdemux->time_segment.position = dvdemux->time_segment.start;
1441 /* calculate current frame number */
1442 format = GST_FORMAT_DEFAULT;
1443 if (!(gst_dvdemux_src_convert (dvdemux, dvdemux->videosrcpad,
1444 GST_FORMAT_TIME, dvdemux->time_segment.start,
1445 format, &dvdemux->frame_offset)))
1448 GST_DEBUG_OBJECT (dvdemux, "sending segment start: %" GST_TIME_FORMAT
1449 ", stop: %" GST_TIME_FORMAT ", time: %" GST_TIME_FORMAT,
1450 GST_TIME_ARGS (dvdemux->time_segment.start),
1451 GST_TIME_ARGS (dvdemux->time_segment.stop),
1452 GST_TIME_ARGS (dvdemux->time_segment.start));
1454 gst_dvdemux_push_event (dvdemux,
1455 gst_event_new_segment (&dvdemux->time_segment));
1457 dvdemux->need_segment = FALSE;
1460 gst_dvdemux_get_timecode (dvdemux, buffer, &timecode);
1461 gst_smpte_time_code_get_frame_number (
1462 (dvdemux->decoder->system == e_dv_system_625_50) ?
1463 GST_SMPTE_TIME_CODE_SYSTEM_25 : GST_SMPTE_TIME_CODE_SYSTEM_30,
1464 &frame_number, &timecode);
1466 next_ts = gst_util_uint64_scale_int (
1467 (dvdemux->frame_offset + 1) * GST_SECOND,
1468 dvdemux->framerate_denominator, dvdemux->framerate_numerator);
1469 duration = next_ts - dvdemux->time_segment.position;
1471 gst_buffer_map (buffer, &map, GST_MAP_READ);
1472 dv_parse_packs (dvdemux->decoder, map.data);
1473 gst_buffer_unmap (buffer, &map);
1474 dvdemux->new_media = FALSE;
1475 if (gst_dvdemux_is_new_media (dvdemux, buffer) &&
1476 dvdemux->frames_since_new_media > 2) {
1477 dvdemux->new_media = TRUE;
1478 dvdemux->frames_since_new_media = 0;
1480 dvdemux->frames_since_new_media++;
1482 /* does not take ownership of buffer */
1483 aret = ret = gst_dvdemux_demux_audio (dvdemux, buffer, duration);
1484 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)) {
1485 gst_buffer_unref (buffer);
1489 /* takes ownership of buffer */
1490 vret = ret = gst_dvdemux_demux_video (dvdemux, buffer, duration);
1491 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED))
1494 /* if both are not linked, we stop */
1495 if (G_UNLIKELY (aret == GST_FLOW_NOT_LINKED && vret == GST_FLOW_NOT_LINKED)) {
1496 ret = GST_FLOW_NOT_LINKED;
1500 dvdemux->time_segment.position = next_ts;
1501 dvdemux->frame_offset++;
1503 /* check for the end of the segment */
1504 if (dvdemux->time_segment.stop != -1 && next_ts > dvdemux->time_segment.stop)
1515 GST_DEBUG ("error generating new_segment event");
1516 gst_buffer_unref (buffer);
1517 return GST_FLOW_ERROR;
1521 /* flush any remaining data in the adapter, used in chain based scheduling mode */
1522 static GstFlowReturn
1523 gst_dvdemux_flush (GstDVDemux * dvdemux)
1525 GstFlowReturn ret = GST_FLOW_OK;
1527 while (gst_adapter_available (dvdemux->adapter) >= dvdemux->frame_len) {
1531 /* get the accumulated bytes */
1532 data = gst_adapter_map (dvdemux->adapter, dvdemux->frame_len);
1534 /* parse header to know the length and other params */
1535 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0)) {
1536 gst_adapter_unmap (dvdemux->adapter);
1537 goto parse_header_error;
1539 gst_adapter_unmap (dvdemux->adapter);
1541 /* after parsing the header we know the length of the data */
1542 length = dvdemux->frame_len = dvdemux->decoder->frame_size;
1543 if (dvdemux->decoder->system == e_dv_system_625_50) {
1544 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1545 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1547 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1548 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1550 g_atomic_int_set (&dvdemux->found_header, 1);
1552 /* let demux_video set the height, it needs to detect when things change so
1553 * it can reset caps */
1555 /* if we still have enough for a frame, start decoding */
1556 if (G_LIKELY (gst_adapter_available (dvdemux->adapter) >= length)) {
1559 buffer = gst_adapter_take_buffer (dvdemux->adapter, length);
1561 /* and decode the buffer, takes ownership */
1562 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1563 if (G_UNLIKELY (ret != GST_FLOW_OK))
1573 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1574 (NULL), ("Error parsing DV header"));
1575 return GST_FLOW_ERROR;
1579 /* streaming operation:
1581 * accumulate data until we have a frame, then decode.
1583 static GstFlowReturn
1584 gst_dvdemux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
1586 GstDVDemux *dvdemux;
1588 GstClockTime timestamp;
1590 dvdemux = GST_DVDEMUX (parent);
1592 /* a discontinuity in the stream, we need to get rid of
1593 * accumulated data in the adapter and assume a new frame
1594 * starts after the discontinuity */
1595 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)))
1596 gst_adapter_clear (dvdemux->adapter);
1598 /* a timestamp always should be respected */
1599 timestamp = GST_BUFFER_TIMESTAMP (buffer);
1600 if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
1601 dvdemux->time_segment.position = timestamp;
1602 /* FIXME, adjust frame_offset and other counters */
1605 gst_adapter_push (dvdemux->adapter, buffer);
1607 /* Apparently dv_parse_header can read from the body of the frame
1608 * too, so it needs more than header_size bytes. Wacky!
1610 if (G_UNLIKELY (dvdemux->frame_len == -1)) {
1611 /* if we don't know the length of a frame, we assume it is
1612 * the NTSC_BUFFER length, as this is enough to figure out
1613 * if this is PAL or NTSC */
1614 dvdemux->frame_len = NTSC_BUFFER;
1617 /* and try to flush pending frames */
1618 ret = gst_dvdemux_flush (dvdemux);
1623 /* pull based operation.
1625 * Read header first to figure out the frame size. Then read
1626 * and decode full frames.
1629 gst_dvdemux_loop (GstPad * pad)
1632 GstDVDemux *dvdemux;
1633 GstBuffer *buffer = NULL;
1636 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1638 if (G_UNLIKELY (g_atomic_int_get (&dvdemux->found_header) == 0)) {
1639 GST_DEBUG_OBJECT (dvdemux, "pulling first buffer");
1640 /* pull in NTSC sized buffer to figure out the frame
1642 ret = gst_pad_pull_range (dvdemux->sinkpad,
1643 dvdemux->byte_segment.position, NTSC_BUFFER, &buffer);
1644 if (G_UNLIKELY (ret != GST_FLOW_OK))
1647 /* check buffer size, don't want to read small buffers */
1648 if (G_UNLIKELY (gst_buffer_get_size (buffer) < NTSC_BUFFER))
1651 gst_buffer_map (buffer, &map, GST_MAP_READ);
1652 /* parse header to know the length and other params */
1653 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, map.data) < 0)) {
1654 gst_buffer_unmap (buffer, &map);
1655 goto parse_header_error;
1657 gst_buffer_unmap (buffer, &map);
1659 /* after parsing the header we know the length of the data */
1660 dvdemux->frame_len = dvdemux->decoder->frame_size;
1661 if (dvdemux->decoder->system == e_dv_system_625_50) {
1662 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1663 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1665 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1666 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1668 dvdemux->need_segment = TRUE;
1670 /* see if we need to read a larger part */
1671 if (dvdemux->frame_len != NTSC_BUFFER) {
1672 gst_buffer_unref (buffer);
1679 /* setting header and prrforming the seek must be atomic */
1680 GST_OBJECT_LOCK (dvdemux);
1681 /* got header now */
1682 g_atomic_int_set (&dvdemux->found_header, 1);
1684 /* now perform pending seek if any. */
1685 event = dvdemux->seek_event;
1687 gst_event_ref (event);
1688 GST_OBJECT_UNLOCK (dvdemux);
1691 if (!gst_dvdemux_handle_pull_seek (dvdemux, dvdemux->videosrcpad,
1693 GST_ELEMENT_WARNING (dvdemux, STREAM, DECODE, (NULL),
1694 ("Error perfoming initial seek"));
1696 gst_event_unref (event);
1698 /* and we need to pull a new buffer in all cases. */
1700 gst_buffer_unref (buffer);
1707 if (G_UNLIKELY (dvdemux->pending_segment)) {
1709 /* now send the newsegment */
1710 GST_DEBUG_OBJECT (dvdemux, "Sending newsegment from");
1712 gst_dvdemux_push_event (dvdemux, dvdemux->pending_segment);
1713 dvdemux->pending_segment = NULL;
1716 if (G_LIKELY (buffer == NULL)) {
1717 GST_DEBUG_OBJECT (dvdemux, "pulling buffer at offset %" G_GINT64_FORMAT,
1718 dvdemux->byte_segment.position);
1720 ret = gst_pad_pull_range (dvdemux->sinkpad,
1721 dvdemux->byte_segment.position, dvdemux->frame_len, &buffer);
1722 if (ret != GST_FLOW_OK)
1725 /* check buffer size, don't want to read small buffers */
1726 if (gst_buffer_get_size (buffer) < dvdemux->frame_len)
1729 /* and decode the buffer */
1730 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1731 if (G_UNLIKELY (ret != GST_FLOW_OK))
1734 /* and position ourselves for the next buffer */
1735 dvdemux->byte_segment.position += dvdemux->frame_len;
1738 gst_object_unref (dvdemux);
1745 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1746 (NULL), ("Error parsing DV header"));
1747 gst_buffer_unref (buffer);
1748 gst_pad_pause_task (dvdemux->sinkpad);
1749 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1754 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1755 (NULL), ("Error reading buffer"));
1756 gst_buffer_unref (buffer);
1757 gst_pad_pause_task (dvdemux->sinkpad);
1758 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1763 GST_INFO_OBJECT (dvdemux, "pausing task, %s", gst_flow_get_name (ret));
1764 gst_pad_pause_task (dvdemux->sinkpad);
1765 if (ret == GST_FLOW_EOS) {
1766 GST_LOG_OBJECT (dvdemux, "got eos");
1767 /* so align our position with the end of it, if there is one
1768 * this ensures a subsequent will arrive at correct base/acc time */
1769 if (dvdemux->time_segment.rate > 0.0 &&
1770 GST_CLOCK_TIME_IS_VALID (dvdemux->time_segment.stop))
1771 dvdemux->time_segment.position = dvdemux->time_segment.stop;
1772 else if (dvdemux->time_segment.rate < 0.0)
1773 dvdemux->time_segment.position = dvdemux->time_segment.start;
1774 /* perform EOS logic */
1775 if (dvdemux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1776 gst_element_post_message (GST_ELEMENT (dvdemux),
1777 gst_message_new_segment_done (GST_OBJECT_CAST (dvdemux),
1778 dvdemux->time_segment.format, dvdemux->time_segment.position));
1779 gst_dvdemux_push_event (dvdemux,
1780 gst_event_new_segment_done (dvdemux->time_segment.format,
1781 dvdemux->time_segment.position));
1783 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1785 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
1786 /* for fatal errors or not-linked we post an error message */
1787 GST_ELEMENT_ERROR (dvdemux, STREAM, FAILED,
1788 (NULL), ("streaming stopped, reason %s", gst_flow_get_name (ret)));
1789 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1796 gst_dvdemux_sink_activate_mode (GstPad * sinkpad, GstObject * parent,
1797 GstPadMode mode, gboolean active)
1800 GstDVDemux *demux = GST_DVDEMUX (parent);
1803 case GST_PAD_MODE_PULL:
1805 demux->seek_handler = gst_dvdemux_handle_pull_seek;
1806 res = gst_pad_start_task (sinkpad,
1807 (GstTaskFunction) gst_dvdemux_loop, sinkpad, NULL);
1809 demux->seek_handler = NULL;
1810 res = gst_pad_stop_task (sinkpad);
1813 case GST_PAD_MODE_PUSH:
1815 GST_DEBUG_OBJECT (demux, "activating push/chain function");
1816 demux->seek_handler = gst_dvdemux_handle_push_seek;
1818 GST_DEBUG_OBJECT (demux, "deactivating push/chain function");
1819 demux->seek_handler = NULL;
1830 /* decide on push or pull based scheduling */
1832 gst_dvdemux_sink_activate (GstPad * sinkpad, GstObject * parent)
1837 query = gst_query_new_scheduling ();
1839 if (!gst_pad_peer_query (sinkpad, query)) {
1840 gst_query_unref (query);
1844 pull_mode = gst_query_has_scheduling_mode_with_flags (query,
1845 GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);
1846 gst_query_unref (query);
1851 GST_DEBUG_OBJECT (sinkpad, "activating pull");
1852 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
1856 GST_DEBUG_OBJECT (sinkpad, "activating push");
1857 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
1861 static GstStateChangeReturn
1862 gst_dvdemux_change_state (GstElement * element, GstStateChange transition)
1864 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1865 GstStateChangeReturn ret;
1867 switch (transition) {
1868 case GST_STATE_CHANGE_NULL_TO_READY:
1870 case GST_STATE_CHANGE_READY_TO_PAUSED:
1871 dvdemux->decoder = dv_decoder_new (0, FALSE, FALSE);
1872 dv_set_error_log (dvdemux->decoder, NULL);
1873 gst_dvdemux_reset (dvdemux);
1875 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1881 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1883 switch (transition) {
1884 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1886 case GST_STATE_CHANGE_PAUSED_TO_READY:
1887 gst_adapter_clear (dvdemux->adapter);
1888 dv_decoder_free (dvdemux->decoder);
1889 dvdemux->decoder = NULL;
1891 gst_dvdemux_remove_pads (dvdemux);
1893 case GST_STATE_CHANGE_READY_TO_NULL:
1897 event_p = &dvdemux->seek_event;
1898 gst_event_replace (event_p, NULL);
1899 if (dvdemux->pending_segment)
1900 gst_event_unref (dvdemux->pending_segment);
1901 dvdemux->pending_segment = NULL;