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., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
25 /* FIXME 0.11: suppress warnings for deprecated API such as GStaticRecMutex
26 * with newer GLib versions (>= 2.31.0) */
27 #define GLIB_DISABLE_DEPRECATION_WARNINGS
32 #include <gst/audio/audio.h>
33 #include "gstdvdemux.h"
34 #include "gstsmptetimecode.h"
37 * SECTION:element-dvdemux
39 * dvdemux splits raw DV into its audio and video components. The audio will be
40 * decoded raw samples and the video will be encoded DV video.
42 * This element can operate in both push and pull mode depending on the
43 * capabilities of the upstream peer.
46 * <title>Example launch line</title>
48 * gst-launch filesrc location=test.dv ! dvdemux name=demux ! queue ! audioconvert ! alsasink demux. ! queue ! dvdec ! xvimagesink
49 * ]| This pipeline decodes and renders the raw DV stream to an audio and a videosink.
52 * Last reviewed on 2006-02-27 (0.10.3)
55 /* DV output has two modes, normal and wide. The resolution is the same in both
56 * cases: 720 pixels wide by 576 pixels tall in PAL format, and 720x480 for
59 * Each of the modes has its own pixel aspect ratio, which is fixed in practice
60 * by ITU-R BT.601 (also known as "CCIR-601" or "Rec.601"). Or so claims a
61 * reference that I culled from the reliable "internet",
62 * http://www.mir.com/DMG/aspect.html. Normal PAL is 59/54 and normal NTSC is
63 * 10/11. Because the pixel resolution is the same for both cases, we can get
64 * the pixel aspect ratio for wide recordings by multiplying by the ratio of
65 * display aspect ratios, 16/9 (for wide) divided by 4/3 (for normal):
67 * Wide NTSC: 10/11 * (16/9)/(4/3) = 40/33
68 * Wide PAL: 59/54 * (16/9)/(4/3) = 118/81
70 * However, the pixel resolution coming out of a DV source does not combine with
71 * the standard pixel aspect ratios to give a proper display aspect ratio. An
72 * image 480 pixels tall, with a 4:3 display aspect ratio, will be 768 pixels
73 * wide. But, if we take the normal PAL aspect ratio of 59/54, and multiply it
74 * with the width of the DV image (720 pixels), we get 786.666..., which is
75 * nonintegral and too wide. The camera is not outputting a 4:3 image.
77 * If the video sink for this stream has fixed dimensions (such as for
78 * fullscreen playback, or for a java applet in a web page), you then have two
79 * choices. Either you show the whole image, but pad the image with black
80 * borders on the top and bottom (like watching a widescreen video on a 4:3
81 * device), or you crop the video to the proper ratio. Apparently the latter is
82 * the standard practice.
84 * For its part, GStreamer is concerned with accuracy and preservation of
85 * information. This element outputs the 720x576 or 720x480 video that it
86 * recieves, noting the proper aspect ratio. This should not be a problem for
87 * windowed applications, which can change size to fit the video. Applications
88 * with fixed size requirements should decide whether to crop or pad which
89 * an element such as videobox can do.
92 #define NTSC_HEIGHT 480
93 #define NTSC_BUFFER 120000
94 #define NTSC_FRAMERATE_NUMERATOR 30000
95 #define NTSC_FRAMERATE_DENOMINATOR 1001
97 #define PAL_HEIGHT 576
98 #define PAL_BUFFER 144000
99 #define PAL_FRAMERATE_NUMERATOR 25
100 #define PAL_FRAMERATE_DENOMINATOR 1
102 #define PAL_NORMAL_PAR_X 59
103 #define PAL_NORMAL_PAR_Y 54
104 #define PAL_WIDE_PAR_X 118
105 #define PAL_WIDE_PAR_Y 81
107 #define NTSC_NORMAL_PAR_X 10
108 #define NTSC_NORMAL_PAR_Y 11
109 #define NTSC_WIDE_PAR_X 40
110 #define NTSC_WIDE_PAR_Y 33
112 GST_DEBUG_CATEGORY_STATIC (dvdemux_debug);
113 #define GST_CAT_DEFAULT dvdemux_debug
115 static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
118 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true")
121 static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video",
124 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) false")
127 static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
130 GST_STATIC_CAPS ("audio/x-raw-int, "
133 "signed = (boolean) TRUE, "
134 "channels = (int) {2, 4}, "
135 "endianness = (int) " G_STRINGIFY (G_BYTE_ORDER) ", "
136 "rate = (int) { 32000, 44100, 48000 }")
140 GST_BOILERPLATE (GstDVDemux, gst_dvdemux, GstElement, GST_TYPE_ELEMENT);
142 static void gst_dvdemux_finalize (GObject * object);
144 /* query functions */
145 static const GstQueryType *gst_dvdemux_get_src_query_types (GstPad * pad);
146 static gboolean gst_dvdemux_src_query (GstPad * pad, GstQuery * query);
147 static const GstQueryType *gst_dvdemux_get_sink_query_types (GstPad * pad);
148 static gboolean gst_dvdemux_sink_query (GstPad * pad, GstQuery * query);
150 /* convert functions */
151 static gboolean gst_dvdemux_sink_convert (GstDVDemux * demux,
152 GstFormat src_format, gint64 src_value, GstFormat * dest_format,
153 gint64 * dest_value);
154 static gboolean gst_dvdemux_src_convert (GstDVDemux * demux, GstPad * pad,
155 GstFormat src_format, gint64 src_value, GstFormat * dest_format,
156 gint64 * dest_value);
158 /* event functions */
159 static gboolean gst_dvdemux_send_event (GstElement * element, GstEvent * event);
160 static gboolean gst_dvdemux_handle_src_event (GstPad * pad, GstEvent * event);
161 static gboolean gst_dvdemux_handle_sink_event (GstPad * pad, GstEvent * event);
163 /* scheduling functions */
164 static void gst_dvdemux_loop (GstPad * pad);
165 static GstFlowReturn gst_dvdemux_flush (GstDVDemux * dvdemux);
166 static GstFlowReturn gst_dvdemux_chain (GstPad * pad, GstBuffer * buffer);
168 /* state change functions */
169 static gboolean gst_dvdemux_sink_activate (GstPad * sinkpad);
170 static gboolean gst_dvdemux_sink_activate_push (GstPad * sinkpad,
172 static gboolean gst_dvdemux_sink_activate_pull (GstPad * sinkpad,
174 static GstStateChangeReturn gst_dvdemux_change_state (GstElement * element,
175 GstStateChange transition);
178 gst_dvdemux_base_init (gpointer g_class)
180 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
182 gst_element_class_add_static_pad_template (element_class, &sink_temp);
183 gst_element_class_add_static_pad_template (element_class,
185 gst_element_class_add_static_pad_template (element_class,
188 gst_element_class_set_details_simple (element_class,
189 "DV system stream demuxer", "Codec/Demuxer",
190 "Uses libdv to separate DV audio from DV video (libdv.sourceforge.net)",
191 "Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim@fluendo.com>");
193 GST_DEBUG_CATEGORY_INIT (dvdemux_debug, "dvdemux", 0, "DV demuxer element");
197 gst_dvdemux_class_init (GstDVDemuxClass * klass)
199 GObjectClass *gobject_class;
200 GstElementClass *gstelement_class;
202 gobject_class = (GObjectClass *) klass;
203 gstelement_class = (GstElementClass *) klass;
205 gobject_class->finalize = gst_dvdemux_finalize;
207 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_dvdemux_change_state);
208 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_dvdemux_send_event);
212 gst_dvdemux_init (GstDVDemux * dvdemux, GstDVDemuxClass * g_class)
216 dvdemux->sinkpad = gst_pad_new_from_static_template (&sink_temp, "sink");
217 /* we can operate in pull and push mode so we install
218 * a custom activate function */
219 gst_pad_set_activate_function (dvdemux->sinkpad,
220 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate));
221 /* the function to activate in push mode */
222 gst_pad_set_activatepush_function (dvdemux->sinkpad,
223 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate_push));
224 /* the function to activate in pull mode */
225 gst_pad_set_activatepull_function (dvdemux->sinkpad,
226 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate_pull));
227 /* for push mode, this is the chain function */
228 gst_pad_set_chain_function (dvdemux->sinkpad,
229 GST_DEBUG_FUNCPTR (gst_dvdemux_chain));
230 /* handling events (in push mode only) */
231 gst_pad_set_event_function (dvdemux->sinkpad,
232 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_sink_event));
233 /* query functions */
234 gst_pad_set_query_function (dvdemux->sinkpad,
235 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_query));
236 gst_pad_set_query_type_function (dvdemux->sinkpad,
237 GST_DEBUG_FUNCPTR (gst_dvdemux_get_sink_query_types));
239 /* now add the pad */
240 gst_element_add_pad (GST_ELEMENT (dvdemux), dvdemux->sinkpad);
242 dvdemux->adapter = gst_adapter_new ();
244 /* we need 4 temp buffers for audio decoding which are of a static
245 * size and which we can allocate here */
246 for (i = 0; i < 4; i++) {
247 dvdemux->audio_buffers[i] =
248 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
253 gst_dvdemux_finalize (GObject * object)
258 dvdemux = GST_DVDEMUX (object);
260 g_object_unref (dvdemux->adapter);
262 /* clean up temp audio buffers */
263 for (i = 0; i < 4; i++) {
264 g_free (dvdemux->audio_buffers[i]);
267 G_OBJECT_CLASS (parent_class)->finalize (object);
270 /* reset to default values before starting streaming */
272 gst_dvdemux_reset (GstDVDemux * dvdemux)
274 dvdemux->frame_offset = 0;
275 dvdemux->audio_offset = 0;
276 dvdemux->video_offset = 0;
277 dvdemux->framecount = 0;
278 g_atomic_int_set (&dvdemux->found_header, 0);
279 dvdemux->frame_len = -1;
280 dvdemux->need_segment = FALSE;
281 dvdemux->new_media = FALSE;
282 dvdemux->framerate_numerator = 0;
283 dvdemux->framerate_denominator = 0;
285 dvdemux->frequency = 0;
286 dvdemux->channels = 0;
287 dvdemux->wide = FALSE;
288 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
289 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
293 gst_dvdemux_add_pad (GstDVDemux * dvdemux, GstStaticPadTemplate * template)
295 gboolean no_more_pads;
298 pad = gst_pad_new_from_static_template (template, template->name_template);
300 gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_dvdemux_src_query));
302 gst_pad_set_query_type_function (pad,
303 GST_DEBUG_FUNCPTR (gst_dvdemux_get_src_query_types));
304 gst_pad_set_event_function (pad,
305 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_src_event));
306 gst_pad_use_fixed_caps (pad);
307 gst_pad_set_active (pad, TRUE);
308 gst_element_add_pad (GST_ELEMENT (dvdemux), pad);
311 (dvdemux->videosrcpad != NULL && template == &audio_src_temp) ||
312 (dvdemux->audiosrcpad != NULL && template == &video_src_temp);
315 gst_element_no_more_pads (GST_ELEMENT (dvdemux));
317 gst_pad_push_event (pad, gst_event_new_new_segment (FALSE,
318 dvdemux->byte_segment.rate, GST_FORMAT_TIME,
319 dvdemux->time_segment.start, dvdemux->time_segment.stop,
320 dvdemux->time_segment.start));
323 gst_element_found_tags (GST_ELEMENT (dvdemux),
324 gst_tag_list_new_full (GST_TAG_CONTAINER_FORMAT, "DV", NULL));
331 gst_dvdemux_remove_pads (GstDVDemux * dvdemux)
333 if (dvdemux->videosrcpad) {
334 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->videosrcpad);
335 dvdemux->videosrcpad = NULL;
337 if (dvdemux->audiosrcpad) {
338 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->audiosrcpad);
339 dvdemux->audiosrcpad = NULL;
344 gst_dvdemux_src_convert (GstDVDemux * dvdemux, GstPad * pad,
345 GstFormat src_format, gint64 src_value, GstFormat * dest_format,
350 if (*dest_format == src_format || src_value == -1) {
351 *dest_value = src_value;
355 if (dvdemux->frame_len <= 0)
358 if (dvdemux->decoder == NULL)
361 GST_INFO_OBJECT (pad,
362 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
363 src_value, src_format, *dest_format);
365 switch (src_format) {
366 case GST_FORMAT_BYTES:
367 switch (*dest_format) {
368 case GST_FORMAT_DEFAULT:
369 if (pad == dvdemux->videosrcpad)
370 *dest_value = src_value / dvdemux->frame_len;
371 else if (pad == dvdemux->audiosrcpad)
372 *dest_value = src_value / (2 * dvdemux->channels);
374 case GST_FORMAT_TIME:
375 *dest_format = GST_FORMAT_TIME;
376 if (pad == dvdemux->videosrcpad)
377 *dest_value = gst_util_uint64_scale (src_value,
378 GST_SECOND * dvdemux->framerate_denominator,
379 dvdemux->frame_len * dvdemux->framerate_numerator);
380 else if (pad == dvdemux->audiosrcpad)
381 *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND,
382 2 * dvdemux->frequency * dvdemux->channels);
388 case GST_FORMAT_TIME:
389 switch (*dest_format) {
390 case GST_FORMAT_BYTES:
391 if (pad == dvdemux->videosrcpad)
392 *dest_value = gst_util_uint64_scale (src_value,
393 dvdemux->frame_len * dvdemux->framerate_numerator,
394 dvdemux->framerate_denominator * GST_SECOND);
395 else if (pad == dvdemux->audiosrcpad)
396 *dest_value = gst_util_uint64_scale_int (src_value,
397 2 * dvdemux->frequency * dvdemux->channels, GST_SECOND);
399 case GST_FORMAT_DEFAULT:
400 if (pad == dvdemux->videosrcpad) {
402 *dest_value = gst_util_uint64_scale (src_value,
403 dvdemux->framerate_numerator,
404 dvdemux->framerate_denominator * GST_SECOND);
407 } else if (pad == dvdemux->audiosrcpad) {
408 *dest_value = gst_util_uint64_scale (src_value,
409 dvdemux->frequency, GST_SECOND);
416 case GST_FORMAT_DEFAULT:
417 switch (*dest_format) {
418 case GST_FORMAT_TIME:
419 if (pad == dvdemux->videosrcpad) {
420 *dest_value = gst_util_uint64_scale (src_value,
421 GST_SECOND * dvdemux->framerate_denominator,
422 dvdemux->framerate_numerator);
423 } else if (pad == dvdemux->audiosrcpad) {
425 *dest_value = gst_util_uint64_scale (src_value,
426 GST_SECOND, dvdemux->frequency);
431 case GST_FORMAT_BYTES:
432 if (pad == dvdemux->videosrcpad) {
433 *dest_value = src_value * dvdemux->frame_len;
434 } else if (pad == dvdemux->audiosrcpad) {
435 *dest_value = src_value * 2 * dvdemux->channels;
447 GST_INFO_OBJECT (pad,
448 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
449 *dest_format, *dest_value, res);
455 GST_INFO ("source conversion failed");
461 gst_dvdemux_sink_convert (GstDVDemux * dvdemux, GstFormat src_format,
462 gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
466 GST_DEBUG_OBJECT (dvdemux, "%d -> %d", src_format, *dest_format);
467 GST_INFO_OBJECT (dvdemux,
468 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
469 src_value, src_format, *dest_format);
471 if (*dest_format == GST_FORMAT_DEFAULT)
472 *dest_format = GST_FORMAT_TIME;
474 if (*dest_format == src_format || src_value == -1) {
475 *dest_value = src_value;
479 if (dvdemux->frame_len <= 0)
482 switch (src_format) {
483 case GST_FORMAT_BYTES:
484 switch (*dest_format) {
485 case GST_FORMAT_TIME:
489 /* get frame number, rounds down so don't combine this
490 * line and the next line. */
491 frame = src_value / dvdemux->frame_len;
493 *dest_value = gst_util_uint64_scale (frame,
494 GST_SECOND * dvdemux->framerate_denominator,
495 dvdemux->framerate_numerator);
502 case GST_FORMAT_TIME:
503 switch (*dest_format) {
504 case GST_FORMAT_BYTES:
508 /* calculate the frame */
510 gst_util_uint64_scale (src_value, dvdemux->framerate_numerator,
511 dvdemux->framerate_denominator * GST_SECOND);
513 /* calculate the offset from the rounded frame */
514 *dest_value = frame * dvdemux->frame_len;
524 GST_INFO_OBJECT (dvdemux,
525 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
526 *dest_format, *dest_value, res);
533 GST_INFO_OBJECT (dvdemux, "sink conversion failed");
538 static const GstQueryType *
539 gst_dvdemux_get_src_query_types (GstPad * pad)
541 static const GstQueryType src_query_types[] = {
548 return src_query_types;
552 gst_dvdemux_src_query (GstPad * pad, GstQuery * query)
557 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
559 switch (GST_QUERY_TYPE (query)) {
560 case GST_QUERY_POSITION:
565 /* get target format */
566 gst_query_parse_position (query, &format, NULL);
568 /* bring the position to the requested format. */
569 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
570 GST_FORMAT_TIME, dvdemux->time_segment.last_stop,
573 gst_query_set_position (query, format, cur);
576 case GST_QUERY_DURATION:
582 /* First ask the peer in the original format */
583 if (!gst_pad_peer_query (dvdemux->sinkpad, query)) {
584 /* get target format */
585 gst_query_parse_duration (query, &format, NULL);
587 /* change query to bytes to perform on peer */
588 gst_query_set_duration (query, GST_FORMAT_BYTES, -1);
590 /* Now ask the peer in BYTES format and try to convert */
591 if (!gst_pad_peer_query (dvdemux->sinkpad, query)) {
595 /* get peer total length */
596 gst_query_parse_duration (query, NULL, &end);
598 /* convert end to requested format */
601 if (!(res = gst_dvdemux_sink_convert (dvdemux,
602 GST_FORMAT_BYTES, end, &format2, &end))) {
605 gst_query_set_duration (query, format, end);
610 case GST_QUERY_CONVERT:
612 GstFormat src_fmt, dest_fmt;
613 gint64 src_val, dest_val;
615 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
617 gst_dvdemux_src_convert (dvdemux, pad, src_fmt, src_val,
618 &dest_fmt, &dest_val)))
620 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
624 res = gst_pad_query_default (pad, query);
627 gst_object_unref (dvdemux);
634 gst_object_unref (dvdemux);
635 GST_DEBUG ("error source query");
640 static const GstQueryType *
641 gst_dvdemux_get_sink_query_types (GstPad * pad)
643 static const GstQueryType sink_query_types[] = {
648 return sink_query_types;
652 gst_dvdemux_sink_query (GstPad * pad, GstQuery * query)
657 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
659 switch (GST_QUERY_TYPE (query)) {
660 case GST_QUERY_CONVERT:
662 GstFormat src_fmt, dest_fmt;
663 gint64 src_val, dest_val;
665 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
667 gst_dvdemux_sink_convert (dvdemux, src_fmt, src_val, &dest_fmt,
670 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
674 res = gst_pad_query_default (pad, query);
677 gst_object_unref (dvdemux);
684 gst_object_unref (dvdemux);
685 GST_DEBUG ("error handling sink query");
690 /* takes ownership of the event */
692 gst_dvdemux_push_event (GstDVDemux * dvdemux, GstEvent * event)
694 gboolean res = FALSE;
696 if (dvdemux->videosrcpad) {
697 gst_event_ref (event);
698 res |= gst_pad_push_event (dvdemux->videosrcpad, event);
701 if (dvdemux->audiosrcpad)
702 res |= gst_pad_push_event (dvdemux->audiosrcpad, event);
704 gst_event_unref (event);
710 gst_dvdemux_handle_sink_event (GstPad * pad, GstEvent * event)
712 GstDVDemux *dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
715 switch (GST_EVENT_TYPE (event)) {
716 case GST_EVENT_FLUSH_START:
717 /* we are not blocking on anything exect the push() calls
718 * to the peer which will be unblocked by forwarding the
720 res = gst_dvdemux_push_event (dvdemux, event);
722 case GST_EVENT_FLUSH_STOP:
723 gst_adapter_clear (dvdemux->adapter);
724 GST_DEBUG ("cleared adapter");
725 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
726 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
727 res = gst_dvdemux_push_event (dvdemux, event);
729 case GST_EVENT_NEWSEGMENT:
734 gint64 start, stop, time;
736 /* parse byte start and stop positions */
737 gst_event_parse_new_segment (event, &update, &rate, &format,
738 &start, &stop, &time);
741 case GST_FORMAT_BYTES:
742 gst_segment_set_newsegment (&dvdemux->byte_segment, update,
743 rate, format, start, stop, time);
745 /* the update can always be sent */
749 update = gst_event_new_new_segment (TRUE,
750 dvdemux->time_segment.rate, dvdemux->time_segment.format,
751 dvdemux->time_segment.start, dvdemux->time_segment.last_stop,
752 dvdemux->time_segment.time);
754 gst_dvdemux_push_event (dvdemux, update);
756 /* and queue a SEGMENT before sending the next set of buffers, we
757 * cannot convert to time yet as we might not know the size of the
759 dvdemux->need_segment = TRUE;
761 gst_event_unref (event);
763 case GST_FORMAT_TIME:
764 gst_segment_set_newsegment (&dvdemux->time_segment, update,
765 rate, format, start, stop, time);
767 /* and we can just forward this time event */
768 res = gst_dvdemux_push_event (dvdemux, event);
771 gst_event_unref (event);
772 /* cannot accept this format */
779 /* flush any pending data, should be nothing left. */
780 gst_dvdemux_flush (dvdemux);
782 res = gst_dvdemux_push_event (dvdemux, event);
783 /* and clear the adapter */
784 gst_adapter_clear (dvdemux->adapter);
787 res = gst_dvdemux_push_event (dvdemux, event);
791 gst_object_unref (dvdemux);
796 /* convert a pair of values on the given srcpad */
798 gst_dvdemux_convert_src_pair (GstDVDemux * dvdemux, GstPad * pad,
799 GstFormat src_format, gint64 src_start, gint64 src_stop,
800 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
804 GST_INFO ("starting conversion of start");
805 /* bring the format to time on srcpad. */
806 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
807 src_format, src_start, &dst_format, dst_start))) {
810 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
812 GST_INFO ("starting conversion of stop");
813 /* bring the format to time on srcpad. */
814 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
815 src_format, src_stop, &dst_format, dst_stop))) {
816 /* could not convert seek format to time offset */
819 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
824 /* convert a pair of values on the sinkpad */
826 gst_dvdemux_convert_sink_pair (GstDVDemux * dvdemux,
827 GstFormat src_format, gint64 src_start, gint64 src_stop,
828 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
832 GST_INFO ("starting conversion of start");
833 /* bring the format to time on srcpad. */
834 if (!(res = gst_dvdemux_sink_convert (dvdemux,
835 src_format, src_start, &dst_format, dst_start))) {
838 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
840 GST_INFO ("starting conversion of stop");
841 /* bring the format to time on srcpad. */
842 if (!(res = gst_dvdemux_sink_convert (dvdemux,
843 src_format, src_stop, &dst_format, dst_stop))) {
844 /* could not convert seek format to time offset */
847 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
852 /* convert a pair of values on the srcpad to a pair of
853 * values on the sinkpad
856 gst_dvdemux_convert_src_to_sink (GstDVDemux * dvdemux, GstPad * pad,
857 GstFormat src_format, gint64 src_start, gint64 src_stop,
858 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
863 conv = GST_FORMAT_TIME;
864 /* convert to TIME intermediate format */
865 if (!(res = gst_dvdemux_convert_src_pair (dvdemux, pad,
866 src_format, src_start, src_stop, conv, dst_start, dst_stop))) {
867 /* could not convert format to time offset */
870 /* convert to dst format on sinkpad */
871 if (!(res = gst_dvdemux_convert_sink_pair (dvdemux,
872 conv, *dst_start, *dst_stop, dst_format, dst_start, dst_stop))) {
873 /* could not convert format to time offset */
882 gst_dvdemux_convert_segment (GstDVDemux * dvdemux, GstSegment * src,
885 dest->rate = src->rate;
886 dest->abs_rate = src->abs_rate;
887 dest->flags = src->flags;
893 /* handle seek in push base mode.
895 * Convert the time seek to a bytes seek and send it
897 * Does not take ownership of the event.
900 gst_dvdemux_handle_push_seek (GstDVDemux * dvdemux, GstPad * pad,
903 gboolean res = FALSE;
907 GstSeekType cur_type, stop_type;
909 gint64 start_position, end_position;
912 gst_event_parse_seek (event, &rate, &format, &flags,
913 &cur_type, &cur, &stop_type, &stop);
915 /* First try if upstream can handle time based seeks */
916 if (format == GST_FORMAT_TIME)
917 res = gst_pad_push_event (dvdemux->sinkpad, gst_event_ref (event));
920 /* we convert the start/stop on the srcpad to the byte format
921 * on the sinkpad and forward the event */
922 res = gst_dvdemux_convert_src_to_sink (dvdemux, pad,
923 format, cur, stop, GST_FORMAT_BYTES, &start_position, &end_position);
927 /* now this is the updated seek event on bytes */
928 newevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
929 cur_type, start_position, stop_type, end_position);
931 res = gst_pad_push_event (dvdemux->sinkpad, newevent);
937 /* position ourselves to the configured segment, used in pull mode.
938 * The input segment is in TIME format. We convert the time values
939 * to bytes values into our byte_segment which we use to pull data from
943 gst_dvdemux_do_seek (GstDVDemux * demux, GstSegment * segment)
948 /* position to value configured is last_stop, this will round down
949 * to the byte position where the frame containing the given
950 * timestamp can be found. */
951 format = GST_FORMAT_BYTES;
952 res = gst_dvdemux_sink_convert (demux,
953 segment->format, segment->last_stop,
954 &format, &demux->byte_segment.last_stop);
958 /* update byte segment start */
959 gst_dvdemux_sink_convert (demux,
960 segment->format, segment->start, &format, &demux->byte_segment.start);
962 /* update byte segment stop */
963 gst_dvdemux_sink_convert (demux,
964 segment->format, segment->stop, &format, &demux->byte_segment.stop);
966 /* update byte segment time */
967 gst_dvdemux_sink_convert (demux,
968 segment->format, segment->time, &format, &demux->byte_segment.time);
970 /* calculate current frame number */
971 format = GST_FORMAT_DEFAULT;
972 gst_dvdemux_src_convert (demux, demux->videosrcpad,
973 segment->format, segment->start, &format, &demux->video_offset);
975 /* calculate current audio number */
976 format = GST_FORMAT_DEFAULT;
977 gst_dvdemux_src_convert (demux, demux->audiosrcpad,
978 segment->format, segment->start, &format, &demux->audio_offset);
980 /* every DV frame corresponts with one video frame */
981 demux->frame_offset = demux->video_offset;
987 /* handle seek in pull base mode.
989 * Does not take ownership of the event.
992 gst_dvdemux_handle_pull_seek (GstDVDemux * demux, GstPad * pad,
999 GstSeekType cur_type, stop_type;
1003 GstSegment seeksegment;
1005 GST_DEBUG_OBJECT (demux, "doing seek");
1007 /* first bring the event format to TIME, our native format
1008 * to perform the seek on */
1012 gst_event_parse_seek (event, &rate, &format, &flags,
1013 &cur_type, &cur, &stop_type, &stop);
1015 /* can't seek backwards yet */
1019 /* convert input format to TIME */
1020 conv = GST_FORMAT_TIME;
1021 if (!(gst_dvdemux_convert_src_pair (demux, pad,
1022 format, cur, stop, conv, &cur, &stop)))
1025 format = GST_FORMAT_TIME;
1030 flush = flags & GST_SEEK_FLAG_FLUSH;
1032 /* send flush start */
1034 gst_dvdemux_push_event (demux, gst_event_new_flush_start ());
1036 gst_pad_pause_task (demux->sinkpad);
1038 /* grab streaming lock, this should eventually be possible, either
1039 * because the task is paused or our streaming thread stopped
1040 * because our peer is flushing. */
1041 GST_PAD_STREAM_LOCK (demux->sinkpad);
1043 /* make copy into temp structure, we can only update the main one
1044 * when the subclass actually could to the seek. */
1045 memcpy (&seeksegment, &demux->time_segment, sizeof (GstSegment));
1047 /* now configure the seek segment */
1049 gst_segment_set_seek (&seeksegment, rate, format, flags,
1050 cur_type, cur, stop_type, stop, &update);
1053 GST_DEBUG_OBJECT (demux, "segment configured from %" G_GINT64_FORMAT
1054 " to %" G_GINT64_FORMAT ", position %" G_GINT64_FORMAT,
1055 seeksegment.start, seeksegment.stop, seeksegment.last_stop);
1057 /* do the seek, segment.last_stop contains new position. */
1058 res = gst_dvdemux_do_seek (demux, &seeksegment);
1060 /* and prepare to continue streaming */
1062 /* send flush stop, peer will accept data and events again. We
1063 * are not yet providing data as we still have the STREAM_LOCK. */
1064 gst_dvdemux_push_event (demux, gst_event_new_flush_stop ());
1065 } else if (res && demux->running) {
1066 /* we are running the current segment and doing a non-flushing seek,
1067 * close the segment first based on the last_stop. */
1068 GST_DEBUG_OBJECT (demux, "closing running segment %" G_GINT64_FORMAT
1069 " to %" G_GINT64_FORMAT, demux->time_segment.start,
1070 demux->time_segment.last_stop);
1072 gst_dvdemux_push_event (demux,
1073 gst_event_new_new_segment (TRUE,
1074 demux->time_segment.rate, demux->time_segment.format,
1075 demux->time_segment.start, demux->time_segment.last_stop,
1076 demux->time_segment.time));
1079 /* if successfull seek, we update our real segment and push
1080 * out the new segment. */
1082 memcpy (&demux->time_segment, &seeksegment, sizeof (GstSegment));
1084 if (demux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1085 gst_element_post_message (GST_ELEMENT_CAST (demux),
1086 gst_message_new_segment_start (GST_OBJECT_CAST (demux),
1087 demux->time_segment.format, demux->time_segment.last_stop));
1089 if ((stop = demux->time_segment.stop) == -1)
1090 stop = demux->time_segment.duration;
1092 GST_INFO_OBJECT (demux,
1093 "Saving newsegment event to be sent in streaming thread");
1095 if (demux->pending_segment)
1096 gst_event_unref (demux->pending_segment);
1098 demux->pending_segment = gst_event_new_new_segment (FALSE,
1099 demux->time_segment.rate, demux->time_segment.format,
1100 demux->time_segment.last_stop, stop, demux->time_segment.time);
1102 demux->need_segment = FALSE;
1105 demux->running = TRUE;
1106 /* and restart the task in case it got paused explicitely or by
1107 * the FLUSH_START event we pushed out. */
1108 gst_pad_start_task (demux->sinkpad, (GstTaskFunction) gst_dvdemux_loop,
1111 /* and release the lock again so we can continue streaming */
1112 GST_PAD_STREAM_UNLOCK (demux->sinkpad);
1119 GST_DEBUG_OBJECT (demux, "negative playback rate %lf not supported.", rate);
1124 GST_DEBUG_OBJECT (demux, "cannot convert to TIME format, seek aborted.");
1130 gst_dvdemux_send_event (GstElement * element, GstEvent * event)
1132 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1133 gboolean res = FALSE;
1135 switch (GST_EVENT_TYPE (event)) {
1136 case GST_EVENT_SEEK:
1138 /* checking header and configuring the seek must be atomic */
1139 GST_OBJECT_LOCK (dvdemux);
1140 if (g_atomic_int_get (&dvdemux->found_header) == 0) {
1143 event_p = &dvdemux->seek_event;
1145 /* We don't have pads yet. Keep the event. */
1146 GST_INFO_OBJECT (dvdemux, "Keeping the seek event for later");
1148 gst_event_replace (event_p, event);
1149 GST_OBJECT_UNLOCK (dvdemux);
1153 GST_OBJECT_UNLOCK (dvdemux);
1155 if (dvdemux->seek_handler) {
1156 res = dvdemux->seek_handler (dvdemux, dvdemux->videosrcpad, event);
1157 gst_event_unref (event);
1163 res = GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
1170 /* handle an event on the source pad, it's most likely a seek */
1172 gst_dvdemux_handle_src_event (GstPad * pad, GstEvent * event)
1174 gboolean res = TRUE;
1175 GstDVDemux *dvdemux;
1177 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1179 switch (GST_EVENT_TYPE (event)) {
1180 case GST_EVENT_SEEK:
1181 /* seek handler is installed based on scheduling mode */
1182 if (dvdemux->seek_handler)
1183 res = dvdemux->seek_handler (dvdemux, pad, event);
1188 /* we can't really (yet) do QoS */
1191 case GST_EVENT_NAVIGATION:
1192 /* no navigation either... */
1196 res = gst_pad_push_event (dvdemux->sinkpad, event);
1201 gst_event_unref (event);
1203 gst_object_unref (dvdemux);
1208 /* does not take ownership of buffer */
1209 static GstFlowReturn
1210 gst_dvdemux_demux_audio (GstDVDemux * dvdemux, GstBuffer * buffer,
1217 data = GST_BUFFER_DATA (buffer);
1219 dv_decode_full_audio (dvdemux->decoder, data, dvdemux->audio_buffers);
1221 if (G_LIKELY ((num_samples = dv_get_num_samples (dvdemux->decoder)) > 0)) {
1225 gint frequency, channels;
1227 if (G_UNLIKELY (dvdemux->audiosrcpad == NULL))
1228 dvdemux->audiosrcpad = gst_dvdemux_add_pad (dvdemux, &audio_src_temp);
1230 /* get initial format or check if format changed */
1231 frequency = dv_get_frequency (dvdemux->decoder);
1232 channels = dv_get_num_channels (dvdemux->decoder);
1234 if (G_UNLIKELY ((frequency != dvdemux->frequency)
1235 || (channels != dvdemux->channels))) {
1238 dvdemux->frequency = frequency;
1239 dvdemux->channels = channels;
1241 /* and set new caps */
1242 caps = gst_caps_new_simple ("audio/x-raw-int",
1243 "rate", G_TYPE_INT, frequency,
1244 "depth", G_TYPE_INT, 16,
1245 "width", G_TYPE_INT, 16,
1246 "signed", G_TYPE_BOOLEAN, TRUE,
1247 "channels", G_TYPE_INT, channels,
1248 "endianness", G_TYPE_INT, G_BYTE_ORDER, NULL);
1249 gst_pad_set_caps (dvdemux->audiosrcpad, caps);
1250 gst_caps_unref (caps);
1253 outbuf = gst_buffer_new_and_alloc (num_samples *
1254 sizeof (gint16) * dvdemux->channels);
1256 a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
1258 for (i = 0; i < num_samples; i++) {
1259 for (j = 0; j < dvdemux->channels; j++) {
1260 *(a_ptr++) = dvdemux->audio_buffers[j][i];
1264 GST_DEBUG ("pushing audio %" GST_TIME_FORMAT,
1265 GST_TIME_ARGS (dvdemux->time_segment.last_stop));
1267 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.last_stop;
1268 GST_BUFFER_DURATION (outbuf) = duration;
1269 GST_BUFFER_OFFSET (outbuf) = dvdemux->audio_offset;
1270 dvdemux->audio_offset += num_samples;
1271 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->audio_offset;
1273 if (dvdemux->new_media)
1274 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1275 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dvdemux->audiosrcpad));
1277 ret = gst_pad_push (dvdemux->audiosrcpad, outbuf);
1286 /* takes ownership of buffer */
1287 static GstFlowReturn
1288 gst_dvdemux_demux_video (GstDVDemux * dvdemux, GstBuffer * buffer,
1294 GstFlowReturn ret = GST_FLOW_OK;
1296 if (G_UNLIKELY (dvdemux->videosrcpad == NULL))
1297 dvdemux->videosrcpad = gst_dvdemux_add_pad (dvdemux, &video_src_temp);
1300 /* framerate is already up-to-date */
1301 height = dvdemux->decoder->height;
1302 wide = dv_format_wide (dvdemux->decoder);
1304 /* see if anything changed */
1305 if (G_UNLIKELY ((dvdemux->height != height) || dvdemux->wide != wide)) {
1309 dvdemux->height = height;
1310 dvdemux->wide = wide;
1312 if (dvdemux->decoder->system == e_dv_system_625_50) {
1314 par_x = PAL_WIDE_PAR_X;
1315 par_y = PAL_WIDE_PAR_Y;
1317 par_x = PAL_NORMAL_PAR_X;
1318 par_y = PAL_NORMAL_PAR_Y;
1322 par_x = NTSC_WIDE_PAR_X;
1323 par_y = NTSC_WIDE_PAR_Y;
1325 par_x = NTSC_NORMAL_PAR_X;
1326 par_y = NTSC_NORMAL_PAR_Y;
1330 caps = gst_caps_new_simple ("video/x-dv",
1331 "systemstream", G_TYPE_BOOLEAN, FALSE,
1332 "width", G_TYPE_INT, 720,
1333 "height", G_TYPE_INT, height,
1334 "framerate", GST_TYPE_FRACTION, dvdemux->framerate_numerator,
1335 dvdemux->framerate_denominator,
1336 "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
1337 gst_pad_set_caps (dvdemux->videosrcpad, caps);
1338 gst_caps_unref (caps);
1341 /* takes ownership of buffer here, we just need to modify
1343 outbuf = gst_buffer_make_metadata_writable (buffer);
1345 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.last_stop;
1346 GST_BUFFER_OFFSET (outbuf) = dvdemux->video_offset;
1347 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->video_offset + 1;
1348 GST_BUFFER_DURATION (outbuf) = duration;
1350 if (dvdemux->new_media)
1351 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1352 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dvdemux->videosrcpad));
1354 GST_DEBUG ("pushing video %" GST_TIME_FORMAT,
1355 GST_TIME_ARGS (dvdemux->time_segment.last_stop));
1357 ret = gst_pad_push (dvdemux->videosrcpad, outbuf);
1359 dvdemux->video_offset++;
1365 get_ssyb_offset (int dif, int ssyb)
1369 offset = dif * 12000; /* to dif */
1370 offset += 80 * (1 + (ssyb / 6)); /* to subcode pack */
1371 offset += 3; /* past header */
1372 offset += 8 * (ssyb % 6); /* to ssyb */
1378 gst_dvdemux_get_timecode (GstDVDemux * dvdemux, GstBuffer * buffer,
1379 GstSMPTETimeCode * timecode)
1381 guint8 *data = GST_BUFFER_DATA (buffer);
1384 int n_difs = dvdemux->decoder->num_dif_seqs;
1386 for (dif = 0; dif < n_difs; dif++) {
1387 offset = get_ssyb_offset (dif, 3);
1388 if (data[offset + 3] == 0x13) {
1389 timecode->frames = ((data[offset + 4] >> 4) & 0x3) * 10 +
1390 (data[offset + 4] & 0xf);
1391 timecode->seconds = ((data[offset + 5] >> 4) & 0x3) * 10 +
1392 (data[offset + 5] & 0xf);
1393 timecode->minutes = ((data[offset + 6] >> 4) & 0x3) * 10 +
1394 (data[offset + 6] & 0xf);
1395 timecode->hours = ((data[offset + 7] >> 4) & 0x3) * 10 +
1396 (data[offset + 7] & 0xf);
1397 GST_DEBUG ("got timecode %" GST_SMPTE_TIME_CODE_FORMAT,
1398 GST_SMPTE_TIME_CODE_ARGS (timecode));
1407 gst_dvdemux_is_new_media (GstDVDemux * dvdemux, GstBuffer * buffer)
1409 guint8 *data = GST_BUFFER_DATA (buffer);
1414 n_difs = dvdemux->decoder->num_dif_seqs;
1416 for (dif = 0; dif < n_difs; dif++) {
1418 aaux_offset = (dif * 12000) + (6 + 16 * 1) * 80 + 3;
1420 aaux_offset = (dif * 12000) + (6 + 16 * 4) * 80 + 3;
1422 if (data[aaux_offset + 0] == 0x51) {
1423 if ((data[aaux_offset + 2] & 0x80) == 0)
1431 /* takes ownership of buffer */
1432 static GstFlowReturn
1433 gst_dvdemux_demux_frame (GstDVDemux * dvdemux, GstBuffer * buffer)
1435 GstClockTime next_ts;
1436 GstFlowReturn aret, vret, ret;
1439 GstSMPTETimeCode timecode;
1442 if (G_UNLIKELY (dvdemux->need_segment)) {
1446 /* convert to time and store as start/end_timestamp */
1447 format = GST_FORMAT_TIME;
1448 if (!(gst_dvdemux_convert_sink_pair (dvdemux,
1449 GST_FORMAT_BYTES, dvdemux->byte_segment.start,
1450 dvdemux->byte_segment.stop, format,
1451 &dvdemux->time_segment.start, &dvdemux->time_segment.stop)))
1454 dvdemux->time_segment.rate = dvdemux->byte_segment.rate;
1455 dvdemux->time_segment.abs_rate = dvdemux->byte_segment.abs_rate;
1456 dvdemux->time_segment.last_stop = dvdemux->time_segment.start;
1458 /* calculate current frame number */
1459 format = GST_FORMAT_DEFAULT;
1460 if (!(gst_dvdemux_src_convert (dvdemux, dvdemux->videosrcpad,
1461 GST_FORMAT_TIME, dvdemux->time_segment.start,
1462 &format, &dvdemux->frame_offset)))
1465 GST_DEBUG_OBJECT (dvdemux, "sending segment start: %" GST_TIME_FORMAT
1466 ", stop: %" GST_TIME_FORMAT ", time: %" GST_TIME_FORMAT,
1467 GST_TIME_ARGS (dvdemux->time_segment.start),
1468 GST_TIME_ARGS (dvdemux->time_segment.stop),
1469 GST_TIME_ARGS (dvdemux->time_segment.start));
1471 event = gst_event_new_new_segment (FALSE, dvdemux->byte_segment.rate,
1472 GST_FORMAT_TIME, dvdemux->time_segment.start,
1473 dvdemux->time_segment.stop, dvdemux->time_segment.start);
1474 gst_dvdemux_push_event (dvdemux, event);
1476 dvdemux->need_segment = FALSE;
1479 gst_dvdemux_get_timecode (dvdemux, buffer, &timecode);
1480 gst_smpte_time_code_get_frame_number (
1481 (dvdemux->decoder->system == e_dv_system_625_50) ?
1482 GST_SMPTE_TIME_CODE_SYSTEM_25 : GST_SMPTE_TIME_CODE_SYSTEM_30,
1483 &frame_number, &timecode);
1485 next_ts = gst_util_uint64_scale_int (
1486 (dvdemux->frame_offset + 1) * GST_SECOND,
1487 dvdemux->framerate_denominator, dvdemux->framerate_numerator);
1488 duration = next_ts - dvdemux->time_segment.last_stop;
1490 data = GST_BUFFER_DATA (buffer);
1492 dv_parse_packs (dvdemux->decoder, data);
1493 dvdemux->new_media = FALSE;
1494 if (gst_dvdemux_is_new_media (dvdemux, buffer) &&
1495 dvdemux->frames_since_new_media > 2) {
1496 dvdemux->new_media = TRUE;
1497 dvdemux->frames_since_new_media = 0;
1499 dvdemux->frames_since_new_media++;
1501 /* does not take ownership of buffer */
1502 aret = ret = gst_dvdemux_demux_audio (dvdemux, buffer, duration);
1503 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)) {
1504 gst_buffer_unref (buffer);
1508 /* takes ownership of buffer */
1509 vret = ret = gst_dvdemux_demux_video (dvdemux, buffer, duration);
1510 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED))
1513 /* if both are not linked, we stop */
1514 if (G_UNLIKELY (aret == GST_FLOW_NOT_LINKED && vret == GST_FLOW_NOT_LINKED)) {
1515 ret = GST_FLOW_NOT_LINKED;
1519 gst_segment_set_last_stop (&dvdemux->time_segment, GST_FORMAT_TIME, next_ts);
1520 dvdemux->frame_offset++;
1522 /* check for the end of the segment */
1523 if (dvdemux->time_segment.stop != -1 && next_ts > dvdemux->time_segment.stop)
1524 ret = GST_FLOW_UNEXPECTED;
1534 GST_DEBUG ("error generating new_segment event");
1535 gst_buffer_unref (buffer);
1536 return GST_FLOW_ERROR;
1540 /* flush any remaining data in the adapter, used in chain based scheduling mode */
1541 static GstFlowReturn
1542 gst_dvdemux_flush (GstDVDemux * dvdemux)
1544 GstFlowReturn ret = GST_FLOW_OK;
1546 while (gst_adapter_available (dvdemux->adapter) >= dvdemux->frame_len) {
1550 /* get the accumulated bytes */
1551 data = gst_adapter_peek (dvdemux->adapter, dvdemux->frame_len);
1553 /* parse header to know the length and other params */
1554 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0))
1555 goto parse_header_error;
1557 /* after parsing the header we know the length of the data */
1558 length = dvdemux->frame_len = dvdemux->decoder->frame_size;
1559 if (dvdemux->decoder->system == e_dv_system_625_50) {
1560 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1561 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1563 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1564 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1566 g_atomic_int_set (&dvdemux->found_header, 1);
1568 /* let demux_video set the height, it needs to detect when things change so
1569 * it can reset caps */
1571 /* if we still have enough for a frame, start decoding */
1572 if (G_LIKELY (gst_adapter_available (dvdemux->adapter) >= length)) {
1575 data = gst_adapter_take (dvdemux->adapter, length);
1577 /* create buffer for the remainder of the code */
1578 buffer = gst_buffer_new ();
1579 GST_BUFFER_DATA (buffer) = (guint8 *) data;
1580 GST_BUFFER_SIZE (buffer) = length;
1581 GST_BUFFER_MALLOCDATA (buffer) = (guint8 *) data;
1583 /* and decode the buffer, takes ownership */
1584 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1585 if (G_UNLIKELY (ret != GST_FLOW_OK))
1595 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1596 (NULL), ("Error parsing DV header"));
1597 return GST_FLOW_ERROR;
1601 /* streaming operation:
1603 * accumulate data until we have a frame, then decode.
1605 static GstFlowReturn
1606 gst_dvdemux_chain (GstPad * pad, GstBuffer * buffer)
1608 GstDVDemux *dvdemux;
1610 GstClockTime timestamp;
1612 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1614 /* a discontinuity in the stream, we need to get rid of
1615 * accumulated data in the adapter and assume a new frame
1616 * starts after the discontinuity */
1617 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)))
1618 gst_adapter_clear (dvdemux->adapter);
1620 /* a timestamp always should be respected */
1621 timestamp = GST_BUFFER_TIMESTAMP (buffer);
1622 if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
1623 gst_segment_set_last_stop (&dvdemux->time_segment, GST_FORMAT_TIME,
1625 /* FIXME, adjust frame_offset and other counters */
1628 gst_adapter_push (dvdemux->adapter, buffer);
1630 /* Apparently dv_parse_header can read from the body of the frame
1631 * too, so it needs more than header_size bytes. Wacky!
1633 if (G_UNLIKELY (dvdemux->frame_len == -1)) {
1634 /* if we don't know the length of a frame, we assume it is
1635 * the NTSC_BUFFER length, as this is enough to figure out
1636 * if this is PAL or NTSC */
1637 dvdemux->frame_len = NTSC_BUFFER;
1640 /* and try to flush pending frames */
1641 ret = gst_dvdemux_flush (dvdemux);
1643 gst_object_unref (dvdemux);
1648 /* pull based operation.
1650 * Read header first to figure out the frame size. Then read
1651 * and decode full frames.
1654 gst_dvdemux_loop (GstPad * pad)
1657 GstDVDemux *dvdemux;
1658 GstBuffer *buffer = NULL;
1661 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1663 if (G_UNLIKELY (g_atomic_int_get (&dvdemux->found_header) == 0)) {
1664 GST_DEBUG_OBJECT (dvdemux, "pulling first buffer");
1665 /* pull in NTSC sized buffer to figure out the frame
1667 ret = gst_pad_pull_range (dvdemux->sinkpad,
1668 dvdemux->byte_segment.last_stop, NTSC_BUFFER, &buffer);
1669 if (G_UNLIKELY (ret != GST_FLOW_OK))
1672 /* check buffer size, don't want to read small buffers */
1673 if (G_UNLIKELY (GST_BUFFER_SIZE (buffer) < NTSC_BUFFER))
1676 data = GST_BUFFER_DATA (buffer);
1678 /* parse header to know the length and other params */
1679 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0))
1680 goto parse_header_error;
1682 /* after parsing the header we know the length of the data */
1683 dvdemux->frame_len = dvdemux->decoder->frame_size;
1684 if (dvdemux->decoder->system == e_dv_system_625_50) {
1685 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1686 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1688 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1689 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1691 dvdemux->need_segment = TRUE;
1693 /* see if we need to read a larger part */
1694 if (dvdemux->frame_len != NTSC_BUFFER) {
1695 gst_buffer_unref (buffer);
1702 /* setting header and prrforming the seek must be atomic */
1703 GST_OBJECT_LOCK (dvdemux);
1704 /* got header now */
1705 g_atomic_int_set (&dvdemux->found_header, 1);
1707 /* now perform pending seek if any. */
1708 event = dvdemux->seek_event;
1710 gst_event_ref (event);
1711 GST_OBJECT_UNLOCK (dvdemux);
1714 if (!gst_dvdemux_handle_pull_seek (dvdemux, dvdemux->videosrcpad,
1716 GST_ELEMENT_WARNING (dvdemux, STREAM, DECODE, (NULL),
1717 ("Error perfoming initial seek"));
1719 gst_event_unref (event);
1721 /* and we need to pull a new buffer in all cases. */
1723 gst_buffer_unref (buffer);
1731 if (G_UNLIKELY (dvdemux->pending_segment)) {
1733 /* now send the newsegment */
1734 GST_DEBUG_OBJECT (dvdemux, "Sending newsegment from");
1736 gst_dvdemux_push_event (dvdemux, dvdemux->pending_segment);
1737 dvdemux->pending_segment = NULL;
1740 if (G_LIKELY (buffer == NULL)) {
1741 GST_DEBUG_OBJECT (dvdemux, "pulling buffer at offset %" G_GINT64_FORMAT,
1742 dvdemux->byte_segment.last_stop);
1744 ret = gst_pad_pull_range (dvdemux->sinkpad,
1745 dvdemux->byte_segment.last_stop, dvdemux->frame_len, &buffer);
1746 if (ret != GST_FLOW_OK)
1749 /* check buffer size, don't want to read small buffers */
1750 if (GST_BUFFER_SIZE (buffer) < dvdemux->frame_len)
1753 /* and decode the buffer */
1754 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1755 if (G_UNLIKELY (ret != GST_FLOW_OK))
1758 /* and position ourselves for the next buffer */
1759 dvdemux->byte_segment.last_stop += dvdemux->frame_len;
1762 gst_object_unref (dvdemux);
1769 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1770 (NULL), ("Error parsing DV header"));
1771 gst_buffer_unref (buffer);
1772 dvdemux->running = FALSE;
1773 gst_pad_pause_task (dvdemux->sinkpad);
1774 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1779 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1780 (NULL), ("Error reading buffer"));
1781 gst_buffer_unref (buffer);
1782 dvdemux->running = FALSE;
1783 gst_pad_pause_task (dvdemux->sinkpad);
1784 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1789 GST_INFO_OBJECT (dvdemux, "pausing task, %s", gst_flow_get_name (ret));
1790 dvdemux->running = FALSE;
1791 gst_pad_pause_task (dvdemux->sinkpad);
1792 if (ret == GST_FLOW_UNEXPECTED) {
1793 GST_LOG_OBJECT (dvdemux, "got eos");
1794 /* perform EOS logic */
1795 if (dvdemux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1796 gst_element_post_message (GST_ELEMENT (dvdemux),
1797 gst_message_new_segment_done (GST_OBJECT_CAST (dvdemux),
1798 dvdemux->time_segment.format, dvdemux->time_segment.last_stop));
1800 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1802 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
1803 /* for fatal errors or not-linked we post an error message */
1804 GST_ELEMENT_ERROR (dvdemux, STREAM, FAILED,
1805 (NULL), ("streaming stopped, reason %s", gst_flow_get_name (ret)));
1806 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1813 gst_dvdemux_sink_activate_push (GstPad * sinkpad, gboolean active)
1815 GstDVDemux *demux = GST_DVDEMUX (gst_pad_get_parent (sinkpad));
1818 demux->seek_handler = gst_dvdemux_handle_push_seek;
1820 demux->seek_handler = NULL;
1822 gst_object_unref (demux);
1828 gst_dvdemux_sink_activate_pull (GstPad * sinkpad, gboolean active)
1830 GstDVDemux *demux = GST_DVDEMUX (gst_pad_get_parent (sinkpad));
1833 demux->running = TRUE;
1834 demux->seek_handler = gst_dvdemux_handle_pull_seek;
1835 gst_pad_start_task (sinkpad, (GstTaskFunction) gst_dvdemux_loop, sinkpad);
1837 demux->seek_handler = NULL;
1838 gst_pad_stop_task (sinkpad);
1839 demux->running = FALSE;
1842 gst_object_unref (demux);
1847 /* decide on push or pull based scheduling */
1849 gst_dvdemux_sink_activate (GstPad * sinkpad)
1853 if (gst_pad_check_pull_range (sinkpad))
1854 ret = gst_pad_activate_pull (sinkpad, TRUE);
1856 ret = gst_pad_activate_push (sinkpad, 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 = 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;