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.
27 #include <gst/audio/audio.h>
28 #include "gstdvdemux.h"
29 #include "gstsmptetimecode.h"
32 * SECTION:element-dvdemux
34 * dvdemux splits raw DV into its audio and video components. The audio will be
35 * decoded raw samples and the video will be encoded DV video.
37 * This element can operate in both push and pull mode depending on the
38 * capabilities of the upstream peer.
41 * <title>Example launch line</title>
43 * gst-launch filesrc location=test.dv ! dvdemux name=demux ! queue ! audioconvert ! alsasink demux. ! queue ! dvdec ! xvimagesink
44 * ]| This pipeline decodes and renders the raw DV stream to an audio and a videosink.
47 * Last reviewed on 2006-02-27 (0.10.3)
50 /* DV output has two modes, normal and wide. The resolution is the same in both
51 * cases: 720 pixels wide by 576 pixels tall in PAL format, and 720x480 for
54 * Each of the modes has its own pixel aspect ratio, which is fixed in practice
55 * by ITU-R BT.601 (also known as "CCIR-601" or "Rec.601"). Or so claims a
56 * reference that I culled from the reliable "internet",
57 * http://www.mir.com/DMG/aspect.html. Normal PAL is 59/54 and normal NTSC is
58 * 10/11. Because the pixel resolution is the same for both cases, we can get
59 * the pixel aspect ratio for wide recordings by multiplying by the ratio of
60 * display aspect ratios, 16/9 (for wide) divided by 4/3 (for normal):
62 * Wide NTSC: 10/11 * (16/9)/(4/3) = 40/33
63 * Wide PAL: 59/54 * (16/9)/(4/3) = 118/81
65 * However, the pixel resolution coming out of a DV source does not combine with
66 * the standard pixel aspect ratios to give a proper display aspect ratio. An
67 * image 480 pixels tall, with a 4:3 display aspect ratio, will be 768 pixels
68 * wide. But, if we take the normal PAL aspect ratio of 59/54, and multiply it
69 * with the width of the DV image (720 pixels), we get 786.666..., which is
70 * nonintegral and too wide. The camera is not outputting a 4:3 image.
72 * If the video sink for this stream has fixed dimensions (such as for
73 * fullscreen playback, or for a java applet in a web page), you then have two
74 * choices. Either you show the whole image, but pad the image with black
75 * borders on the top and bottom (like watching a widescreen video on a 4:3
76 * device), or you crop the video to the proper ratio. Apparently the latter is
77 * the standard practice.
79 * For its part, GStreamer is concerned with accuracy and preservation of
80 * information. This element outputs the 720x576 or 720x480 video that it
81 * recieves, noting the proper aspect ratio. This should not be a problem for
82 * windowed applications, which can change size to fit the video. Applications
83 * with fixed size requirements should decide whether to crop or pad which
84 * an element such as videobox can do.
87 #define NTSC_HEIGHT 480
88 #define NTSC_BUFFER 120000
89 #define NTSC_FRAMERATE_NUMERATOR 30000
90 #define NTSC_FRAMERATE_DENOMINATOR 1001
92 #define PAL_HEIGHT 576
93 #define PAL_BUFFER 144000
94 #define PAL_FRAMERATE_NUMERATOR 25
95 #define PAL_FRAMERATE_DENOMINATOR 1
97 #define PAL_NORMAL_PAR_X 59
98 #define PAL_NORMAL_PAR_Y 54
99 #define PAL_WIDE_PAR_X 118
100 #define PAL_WIDE_PAR_Y 81
102 #define NTSC_NORMAL_PAR_X 10
103 #define NTSC_NORMAL_PAR_Y 11
104 #define NTSC_WIDE_PAR_X 40
105 #define NTSC_WIDE_PAR_Y 33
107 GST_DEBUG_CATEGORY_STATIC (dvdemux_debug);
108 #define GST_CAT_DEFAULT dvdemux_debug
110 static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
113 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true")
116 static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video",
119 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) false")
122 static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
125 GST_STATIC_CAPS ("audio/x-raw-int, "
128 "signed = (boolean) TRUE, "
129 "channels = (int) {2, 4}, "
130 "endianness = (int) " G_STRINGIFY (G_BYTE_ORDER) ", "
131 "rate = (int) { 32000, 44100, 48000 }")
135 GST_BOILERPLATE (GstDVDemux, gst_dvdemux, GstElement, GST_TYPE_ELEMENT);
137 static void gst_dvdemux_finalize (GObject * object);
139 /* query functions */
140 static const GstQueryType *gst_dvdemux_get_src_query_types (GstPad * pad);
141 static gboolean gst_dvdemux_src_query (GstPad * pad, GstQuery * query);
142 static const GstQueryType *gst_dvdemux_get_sink_query_types (GstPad * pad);
143 static gboolean gst_dvdemux_sink_query (GstPad * pad, GstQuery * query);
145 /* convert functions */
146 static gboolean gst_dvdemux_sink_convert (GstDVDemux * demux,
147 GstFormat src_format, gint64 src_value, GstFormat * dest_format,
148 gint64 * dest_value);
149 static gboolean gst_dvdemux_src_convert (GstDVDemux * demux, GstPad * pad,
150 GstFormat src_format, gint64 src_value, GstFormat * dest_format,
151 gint64 * dest_value);
153 /* event functions */
154 static gboolean gst_dvdemux_send_event (GstElement * element, GstEvent * event);
155 static gboolean gst_dvdemux_handle_src_event (GstPad * pad, GstEvent * event);
156 static gboolean gst_dvdemux_handle_sink_event (GstPad * pad, GstEvent * event);
158 /* scheduling functions */
159 static void gst_dvdemux_loop (GstPad * pad);
160 static GstFlowReturn gst_dvdemux_flush (GstDVDemux * dvdemux);
161 static GstFlowReturn gst_dvdemux_chain (GstPad * pad, GstBuffer * buffer);
163 /* state change functions */
164 static gboolean gst_dvdemux_sink_activate (GstPad * sinkpad);
165 static gboolean gst_dvdemux_sink_activate_push (GstPad * sinkpad,
167 static gboolean gst_dvdemux_sink_activate_pull (GstPad * sinkpad,
169 static GstStateChangeReturn gst_dvdemux_change_state (GstElement * element,
170 GstStateChange transition);
173 gst_dvdemux_base_init (gpointer g_class)
175 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
177 gst_element_class_add_static_pad_template (element_class, &sink_temp);
178 gst_element_class_add_static_pad_template (element_class,
180 gst_element_class_add_static_pad_template (element_class,
183 gst_element_class_set_details_simple (element_class,
184 "DV system stream demuxer", "Codec/Demuxer",
185 "Uses libdv to separate DV audio from DV video (libdv.sourceforge.net)",
186 "Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim@fluendo.com>");
188 GST_DEBUG_CATEGORY_INIT (dvdemux_debug, "dvdemux", 0, "DV demuxer element");
192 gst_dvdemux_class_init (GstDVDemuxClass * klass)
194 GObjectClass *gobject_class;
195 GstElementClass *gstelement_class;
197 gobject_class = (GObjectClass *) klass;
198 gstelement_class = (GstElementClass *) klass;
200 gobject_class->finalize = gst_dvdemux_finalize;
202 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_dvdemux_change_state);
203 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_dvdemux_send_event);
207 gst_dvdemux_init (GstDVDemux * dvdemux, GstDVDemuxClass * g_class)
211 dvdemux->sinkpad = gst_pad_new_from_static_template (&sink_temp, "sink");
212 /* we can operate in pull and push mode so we install
213 * a custom activate function */
214 gst_pad_set_activate_function (dvdemux->sinkpad,
215 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate));
216 /* the function to activate in push mode */
217 gst_pad_set_activatepush_function (dvdemux->sinkpad,
218 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate_push));
219 /* the function to activate in pull mode */
220 gst_pad_set_activatepull_function (dvdemux->sinkpad,
221 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate_pull));
222 /* for push mode, this is the chain function */
223 gst_pad_set_chain_function (dvdemux->sinkpad,
224 GST_DEBUG_FUNCPTR (gst_dvdemux_chain));
225 /* handling events (in push mode only) */
226 gst_pad_set_event_function (dvdemux->sinkpad,
227 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_sink_event));
228 /* query functions */
229 gst_pad_set_query_function (dvdemux->sinkpad,
230 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_query));
231 gst_pad_set_query_type_function (dvdemux->sinkpad,
232 GST_DEBUG_FUNCPTR (gst_dvdemux_get_sink_query_types));
234 /* now add the pad */
235 gst_element_add_pad (GST_ELEMENT (dvdemux), dvdemux->sinkpad);
237 dvdemux->adapter = gst_adapter_new ();
239 /* we need 4 temp buffers for audio decoding which are of a static
240 * size and which we can allocate here */
241 for (i = 0; i < 4; i++) {
242 dvdemux->audio_buffers[i] =
243 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
248 gst_dvdemux_finalize (GObject * object)
253 dvdemux = GST_DVDEMUX (object);
255 g_object_unref (dvdemux->adapter);
257 /* clean up temp audio buffers */
258 for (i = 0; i < 4; i++) {
259 g_free (dvdemux->audio_buffers[i]);
262 G_OBJECT_CLASS (parent_class)->finalize (object);
265 /* reset to default values before starting streaming */
267 gst_dvdemux_reset (GstDVDemux * dvdemux)
269 dvdemux->frame_offset = 0;
270 dvdemux->audio_offset = 0;
271 dvdemux->video_offset = 0;
272 dvdemux->framecount = 0;
273 g_atomic_int_set (&dvdemux->found_header, 0);
274 dvdemux->frame_len = -1;
275 dvdemux->need_segment = FALSE;
276 dvdemux->new_media = FALSE;
277 dvdemux->framerate_numerator = 0;
278 dvdemux->framerate_denominator = 0;
280 dvdemux->frequency = 0;
281 dvdemux->channels = 0;
282 dvdemux->wide = FALSE;
283 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
284 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
288 gst_dvdemux_add_pad (GstDVDemux * dvdemux, GstStaticPadTemplate * template)
290 gboolean no_more_pads;
293 pad = gst_pad_new_from_static_template (template, template->name_template);
295 gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_dvdemux_src_query));
297 gst_pad_set_query_type_function (pad,
298 GST_DEBUG_FUNCPTR (gst_dvdemux_get_src_query_types));
299 gst_pad_set_event_function (pad,
300 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_src_event));
301 gst_pad_use_fixed_caps (pad);
302 gst_pad_set_active (pad, TRUE);
303 gst_element_add_pad (GST_ELEMENT (dvdemux), pad);
306 (dvdemux->videosrcpad != NULL && template == &audio_src_temp) ||
307 (dvdemux->audiosrcpad != NULL && template == &video_src_temp);
310 gst_element_no_more_pads (GST_ELEMENT (dvdemux));
312 gst_pad_push_event (pad, gst_event_new_new_segment (FALSE,
313 dvdemux->byte_segment.rate, GST_FORMAT_TIME,
314 dvdemux->time_segment.start, dvdemux->time_segment.stop,
315 dvdemux->time_segment.start));
318 gst_element_found_tags (GST_ELEMENT (dvdemux),
319 gst_tag_list_new_full (GST_TAG_CONTAINER_FORMAT, "DV", NULL));
326 gst_dvdemux_remove_pads (GstDVDemux * dvdemux)
328 if (dvdemux->videosrcpad) {
329 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->videosrcpad);
330 dvdemux->videosrcpad = NULL;
332 if (dvdemux->audiosrcpad) {
333 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->audiosrcpad);
334 dvdemux->audiosrcpad = NULL;
339 gst_dvdemux_src_convert (GstDVDemux * dvdemux, GstPad * pad,
340 GstFormat src_format, gint64 src_value, GstFormat * dest_format,
345 if (*dest_format == src_format || src_value == -1) {
346 *dest_value = src_value;
350 if (dvdemux->frame_len <= 0)
353 if (dvdemux->decoder == NULL)
356 GST_INFO_OBJECT (pad,
357 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
358 src_value, src_format, *dest_format);
360 switch (src_format) {
361 case GST_FORMAT_BYTES:
362 switch (*dest_format) {
363 case GST_FORMAT_DEFAULT:
364 if (pad == dvdemux->videosrcpad)
365 *dest_value = src_value / dvdemux->frame_len;
366 else if (pad == dvdemux->audiosrcpad)
367 *dest_value = src_value / (2 * dvdemux->channels);
369 case GST_FORMAT_TIME:
370 *dest_format = GST_FORMAT_TIME;
371 if (pad == dvdemux->videosrcpad)
372 *dest_value = gst_util_uint64_scale (src_value,
373 GST_SECOND * dvdemux->framerate_denominator,
374 dvdemux->frame_len * dvdemux->framerate_numerator);
375 else if (pad == dvdemux->audiosrcpad)
376 *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND,
377 2 * dvdemux->frequency * dvdemux->channels);
383 case GST_FORMAT_TIME:
384 switch (*dest_format) {
385 case GST_FORMAT_BYTES:
386 if (pad == dvdemux->videosrcpad)
387 *dest_value = gst_util_uint64_scale (src_value,
388 dvdemux->frame_len * dvdemux->framerate_numerator,
389 dvdemux->framerate_denominator * GST_SECOND);
390 else if (pad == dvdemux->audiosrcpad)
391 *dest_value = gst_util_uint64_scale_int (src_value,
392 2 * dvdemux->frequency * dvdemux->channels, GST_SECOND);
394 case GST_FORMAT_DEFAULT:
395 if (pad == dvdemux->videosrcpad) {
397 *dest_value = gst_util_uint64_scale (src_value,
398 dvdemux->framerate_numerator,
399 dvdemux->framerate_denominator * GST_SECOND);
402 } else if (pad == dvdemux->audiosrcpad) {
403 *dest_value = gst_util_uint64_scale (src_value,
404 dvdemux->frequency, GST_SECOND);
411 case GST_FORMAT_DEFAULT:
412 switch (*dest_format) {
413 case GST_FORMAT_TIME:
414 if (pad == dvdemux->videosrcpad) {
415 *dest_value = gst_util_uint64_scale (src_value,
416 GST_SECOND * dvdemux->framerate_denominator,
417 dvdemux->framerate_numerator);
418 } else if (pad == dvdemux->audiosrcpad) {
420 *dest_value = gst_util_uint64_scale (src_value,
421 GST_SECOND, dvdemux->frequency);
426 case GST_FORMAT_BYTES:
427 if (pad == dvdemux->videosrcpad) {
428 *dest_value = src_value * dvdemux->frame_len;
429 } else if (pad == dvdemux->audiosrcpad) {
430 *dest_value = src_value * 2 * dvdemux->channels;
442 GST_INFO_OBJECT (pad,
443 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
444 *dest_format, *dest_value, res);
450 GST_INFO ("source conversion failed");
456 gst_dvdemux_sink_convert (GstDVDemux * dvdemux, GstFormat src_format,
457 gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
461 GST_DEBUG_OBJECT (dvdemux, "%d -> %d", src_format, *dest_format);
462 GST_INFO_OBJECT (dvdemux,
463 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
464 src_value, src_format, *dest_format);
466 if (*dest_format == GST_FORMAT_DEFAULT)
467 *dest_format = GST_FORMAT_TIME;
469 if (*dest_format == src_format || src_value == -1) {
470 *dest_value = src_value;
474 if (dvdemux->frame_len <= 0)
477 switch (src_format) {
478 case GST_FORMAT_BYTES:
479 switch (*dest_format) {
480 case GST_FORMAT_TIME:
484 /* get frame number, rounds down so don't combine this
485 * line and the next line. */
486 frame = src_value / dvdemux->frame_len;
488 *dest_value = gst_util_uint64_scale (frame,
489 GST_SECOND * dvdemux->framerate_denominator,
490 dvdemux->framerate_numerator);
497 case GST_FORMAT_TIME:
498 switch (*dest_format) {
499 case GST_FORMAT_BYTES:
503 /* calculate the frame */
505 gst_util_uint64_scale (src_value, dvdemux->framerate_numerator,
506 dvdemux->framerate_denominator * GST_SECOND);
508 /* calculate the offset from the rounded frame */
509 *dest_value = frame * dvdemux->frame_len;
519 GST_INFO_OBJECT (dvdemux,
520 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
521 *dest_format, *dest_value, res);
528 GST_INFO_OBJECT (dvdemux, "sink conversion failed");
533 static const GstQueryType *
534 gst_dvdemux_get_src_query_types (GstPad * pad)
536 static const GstQueryType src_query_types[] = {
543 return src_query_types;
547 gst_dvdemux_src_query (GstPad * pad, GstQuery * query)
552 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
554 switch (GST_QUERY_TYPE (query)) {
555 case GST_QUERY_POSITION:
560 /* get target format */
561 gst_query_parse_position (query, &format, NULL);
563 /* bring the position to the requested format. */
564 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
565 GST_FORMAT_TIME, dvdemux->time_segment.last_stop,
568 gst_query_set_position (query, format, cur);
571 case GST_QUERY_DURATION:
577 /* First ask the peer in the original format */
578 if (!gst_pad_peer_query (dvdemux->sinkpad, query)) {
579 /* get target format */
580 gst_query_parse_duration (query, &format, NULL);
582 /* change query to bytes to perform on peer */
583 gst_query_set_duration (query, GST_FORMAT_BYTES, -1);
585 /* Now ask the peer in BYTES format and try to convert */
586 if (!gst_pad_peer_query (dvdemux->sinkpad, query)) {
590 /* get peer total length */
591 gst_query_parse_duration (query, NULL, &end);
593 /* convert end to requested format */
596 if (!(res = gst_dvdemux_sink_convert (dvdemux,
597 GST_FORMAT_BYTES, end, &format2, &end))) {
600 gst_query_set_duration (query, format, end);
605 case GST_QUERY_CONVERT:
607 GstFormat src_fmt, dest_fmt;
608 gint64 src_val, dest_val;
610 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
612 gst_dvdemux_src_convert (dvdemux, pad, src_fmt, src_val,
613 &dest_fmt, &dest_val)))
615 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
619 res = gst_pad_query_default (pad, query);
622 gst_object_unref (dvdemux);
629 gst_object_unref (dvdemux);
630 GST_DEBUG ("error source query");
635 static const GstQueryType *
636 gst_dvdemux_get_sink_query_types (GstPad * pad)
638 static const GstQueryType sink_query_types[] = {
643 return sink_query_types;
647 gst_dvdemux_sink_query (GstPad * pad, GstQuery * query)
652 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
654 switch (GST_QUERY_TYPE (query)) {
655 case GST_QUERY_CONVERT:
657 GstFormat src_fmt, dest_fmt;
658 gint64 src_val, dest_val;
660 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
662 gst_dvdemux_sink_convert (dvdemux, src_fmt, src_val, &dest_fmt,
665 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
669 res = gst_pad_query_default (pad, query);
672 gst_object_unref (dvdemux);
679 gst_object_unref (dvdemux);
680 GST_DEBUG ("error handling sink query");
685 /* takes ownership of the event */
687 gst_dvdemux_push_event (GstDVDemux * dvdemux, GstEvent * event)
689 gboolean res = FALSE;
691 if (dvdemux->videosrcpad) {
692 gst_event_ref (event);
693 res |= gst_pad_push_event (dvdemux->videosrcpad, event);
696 if (dvdemux->audiosrcpad)
697 res |= gst_pad_push_event (dvdemux->audiosrcpad, event);
699 gst_event_unref (event);
705 gst_dvdemux_handle_sink_event (GstPad * pad, GstEvent * event)
707 GstDVDemux *dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
710 switch (GST_EVENT_TYPE (event)) {
711 case GST_EVENT_FLUSH_START:
712 /* we are not blocking on anything exect the push() calls
713 * to the peer which will be unblocked by forwarding the
715 res = gst_dvdemux_push_event (dvdemux, event);
717 case GST_EVENT_FLUSH_STOP:
718 gst_adapter_clear (dvdemux->adapter);
719 GST_DEBUG ("cleared adapter");
720 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
721 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
722 res = gst_dvdemux_push_event (dvdemux, event);
724 case GST_EVENT_NEWSEGMENT:
729 gint64 start, stop, time;
731 /* parse byte start and stop positions */
732 gst_event_parse_new_segment (event, &update, &rate, &format,
733 &start, &stop, &time);
736 case GST_FORMAT_BYTES:
737 gst_segment_set_newsegment (&dvdemux->byte_segment, update,
738 rate, format, start, stop, time);
740 /* the update can always be sent */
744 update = gst_event_new_new_segment (TRUE,
745 dvdemux->time_segment.rate, dvdemux->time_segment.format,
746 dvdemux->time_segment.start, dvdemux->time_segment.last_stop,
747 dvdemux->time_segment.time);
749 gst_dvdemux_push_event (dvdemux, update);
751 /* and queue a SEGMENT before sending the next set of buffers, we
752 * cannot convert to time yet as we might not know the size of the
754 dvdemux->need_segment = TRUE;
756 gst_event_unref (event);
758 case GST_FORMAT_TIME:
759 gst_segment_set_newsegment (&dvdemux->time_segment, update,
760 rate, format, start, stop, time);
762 /* and we can just forward this time event */
763 res = gst_dvdemux_push_event (dvdemux, event);
766 gst_event_unref (event);
767 /* cannot accept this format */
774 /* flush any pending data, should be nothing left. */
775 gst_dvdemux_flush (dvdemux);
777 res = gst_dvdemux_push_event (dvdemux, event);
778 /* and clear the adapter */
779 gst_adapter_clear (dvdemux->adapter);
782 res = gst_dvdemux_push_event (dvdemux, event);
786 gst_object_unref (dvdemux);
791 /* convert a pair of values on the given srcpad */
793 gst_dvdemux_convert_src_pair (GstDVDemux * dvdemux, GstPad * pad,
794 GstFormat src_format, gint64 src_start, gint64 src_stop,
795 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
799 GST_INFO ("starting conversion of start");
800 /* bring the format to time on srcpad. */
801 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
802 src_format, src_start, &dst_format, dst_start))) {
805 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
807 GST_INFO ("starting conversion of stop");
808 /* bring the format to time on srcpad. */
809 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
810 src_format, src_stop, &dst_format, dst_stop))) {
811 /* could not convert seek format to time offset */
814 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
819 /* convert a pair of values on the sinkpad */
821 gst_dvdemux_convert_sink_pair (GstDVDemux * dvdemux,
822 GstFormat src_format, gint64 src_start, gint64 src_stop,
823 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
827 GST_INFO ("starting conversion of start");
828 /* bring the format to time on srcpad. */
829 if (!(res = gst_dvdemux_sink_convert (dvdemux,
830 src_format, src_start, &dst_format, dst_start))) {
833 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
835 GST_INFO ("starting conversion of stop");
836 /* bring the format to time on srcpad. */
837 if (!(res = gst_dvdemux_sink_convert (dvdemux,
838 src_format, src_stop, &dst_format, dst_stop))) {
839 /* could not convert seek format to time offset */
842 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
847 /* convert a pair of values on the srcpad to a pair of
848 * values on the sinkpad
851 gst_dvdemux_convert_src_to_sink (GstDVDemux * dvdemux, GstPad * pad,
852 GstFormat src_format, gint64 src_start, gint64 src_stop,
853 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
858 conv = GST_FORMAT_TIME;
859 /* convert to TIME intermediate format */
860 if (!(res = gst_dvdemux_convert_src_pair (dvdemux, pad,
861 src_format, src_start, src_stop, conv, dst_start, dst_stop))) {
862 /* could not convert format to time offset */
865 /* convert to dst format on sinkpad */
866 if (!(res = gst_dvdemux_convert_sink_pair (dvdemux,
867 conv, *dst_start, *dst_stop, dst_format, dst_start, dst_stop))) {
868 /* could not convert format to time offset */
877 gst_dvdemux_convert_segment (GstDVDemux * dvdemux, GstSegment * src,
880 dest->rate = src->rate;
881 dest->abs_rate = src->abs_rate;
882 dest->flags = src->flags;
888 /* handle seek in push base mode.
890 * Convert the time seek to a bytes seek and send it
892 * Does not take ownership of the event.
895 gst_dvdemux_handle_push_seek (GstDVDemux * dvdemux, GstPad * pad,
898 gboolean res = FALSE;
902 GstSeekType cur_type, stop_type;
904 gint64 start_position, end_position;
907 gst_event_parse_seek (event, &rate, &format, &flags,
908 &cur_type, &cur, &stop_type, &stop);
910 /* First try if upstream can handle time based seeks */
911 if (format == GST_FORMAT_TIME)
912 res = gst_pad_push_event (dvdemux->sinkpad, gst_event_ref (event));
915 /* we convert the start/stop on the srcpad to the byte format
916 * on the sinkpad and forward the event */
917 res = gst_dvdemux_convert_src_to_sink (dvdemux, pad,
918 format, cur, stop, GST_FORMAT_BYTES, &start_position, &end_position);
922 /* now this is the updated seek event on bytes */
923 newevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
924 cur_type, start_position, stop_type, end_position);
926 res = gst_pad_push_event (dvdemux->sinkpad, newevent);
932 /* position ourselves to the configured segment, used in pull mode.
933 * The input segment is in TIME format. We convert the time values
934 * to bytes values into our byte_segment which we use to pull data from
938 gst_dvdemux_do_seek (GstDVDemux * demux, GstSegment * segment)
943 /* position to value configured is last_stop, this will round down
944 * to the byte position where the frame containing the given
945 * timestamp can be found. */
946 format = GST_FORMAT_BYTES;
947 res = gst_dvdemux_sink_convert (demux,
948 segment->format, segment->last_stop,
949 &format, &demux->byte_segment.last_stop);
953 /* update byte segment start */
954 gst_dvdemux_sink_convert (demux,
955 segment->format, segment->start, &format, &demux->byte_segment.start);
957 /* update byte segment stop */
958 gst_dvdemux_sink_convert (demux,
959 segment->format, segment->stop, &format, &demux->byte_segment.stop);
961 /* update byte segment time */
962 gst_dvdemux_sink_convert (demux,
963 segment->format, segment->time, &format, &demux->byte_segment.time);
965 /* calculate current frame number */
966 format = GST_FORMAT_DEFAULT;
967 gst_dvdemux_src_convert (demux, demux->videosrcpad,
968 segment->format, segment->start, &format, &demux->video_offset);
970 /* calculate current audio number */
971 format = GST_FORMAT_DEFAULT;
972 gst_dvdemux_src_convert (demux, demux->audiosrcpad,
973 segment->format, segment->start, &format, &demux->audio_offset);
975 /* every DV frame corresponts with one video frame */
976 demux->frame_offset = demux->video_offset;
982 /* handle seek in pull base mode.
984 * Does not take ownership of the event.
987 gst_dvdemux_handle_pull_seek (GstDVDemux * demux, GstPad * pad,
994 GstSeekType cur_type, stop_type;
998 GstSegment seeksegment;
1000 GST_DEBUG_OBJECT (demux, "doing seek");
1002 /* first bring the event format to TIME, our native format
1003 * to perform the seek on */
1007 gst_event_parse_seek (event, &rate, &format, &flags,
1008 &cur_type, &cur, &stop_type, &stop);
1010 /* can't seek backwards yet */
1014 /* convert input format to TIME */
1015 conv = GST_FORMAT_TIME;
1016 if (!(gst_dvdemux_convert_src_pair (demux, pad,
1017 format, cur, stop, conv, &cur, &stop)))
1020 format = GST_FORMAT_TIME;
1025 flush = flags & GST_SEEK_FLAG_FLUSH;
1027 /* send flush start */
1029 gst_dvdemux_push_event (demux, gst_event_new_flush_start ());
1031 gst_pad_pause_task (demux->sinkpad);
1033 /* grab streaming lock, this should eventually be possible, either
1034 * because the task is paused or our streaming thread stopped
1035 * because our peer is flushing. */
1036 GST_PAD_STREAM_LOCK (demux->sinkpad);
1038 /* make copy into temp structure, we can only update the main one
1039 * when the subclass actually could to the seek. */
1040 memcpy (&seeksegment, &demux->time_segment, sizeof (GstSegment));
1042 /* now configure the seek segment */
1044 gst_segment_set_seek (&seeksegment, rate, format, flags,
1045 cur_type, cur, stop_type, stop, &update);
1048 GST_DEBUG_OBJECT (demux, "segment configured from %" G_GINT64_FORMAT
1049 " to %" G_GINT64_FORMAT ", position %" G_GINT64_FORMAT,
1050 seeksegment.start, seeksegment.stop, seeksegment.last_stop);
1052 /* do the seek, segment.last_stop contains new position. */
1053 res = gst_dvdemux_do_seek (demux, &seeksegment);
1055 /* and prepare to continue streaming */
1057 /* send flush stop, peer will accept data and events again. We
1058 * are not yet providing data as we still have the STREAM_LOCK. */
1059 gst_dvdemux_push_event (demux, gst_event_new_flush_stop ());
1060 } else if (res && demux->running) {
1061 /* we are running the current segment and doing a non-flushing seek,
1062 * close the segment first based on the last_stop. */
1063 GST_DEBUG_OBJECT (demux, "closing running segment %" G_GINT64_FORMAT
1064 " to %" G_GINT64_FORMAT, demux->time_segment.start,
1065 demux->time_segment.last_stop);
1067 gst_dvdemux_push_event (demux,
1068 gst_event_new_new_segment (TRUE,
1069 demux->time_segment.rate, demux->time_segment.format,
1070 demux->time_segment.start, demux->time_segment.last_stop,
1071 demux->time_segment.time));
1074 /* if successfull seek, we update our real segment and push
1075 * out the new segment. */
1077 memcpy (&demux->time_segment, &seeksegment, sizeof (GstSegment));
1079 if (demux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1080 gst_element_post_message (GST_ELEMENT_CAST (demux),
1081 gst_message_new_segment_start (GST_OBJECT_CAST (demux),
1082 demux->time_segment.format, demux->time_segment.last_stop));
1084 if ((stop = demux->time_segment.stop) == -1)
1085 stop = demux->time_segment.duration;
1087 GST_INFO_OBJECT (demux,
1088 "Saving newsegment event to be sent in streaming thread");
1090 if (demux->pending_segment)
1091 gst_event_unref (demux->pending_segment);
1093 demux->pending_segment = gst_event_new_new_segment (FALSE,
1094 demux->time_segment.rate, demux->time_segment.format,
1095 demux->time_segment.last_stop, stop, demux->time_segment.time);
1097 demux->need_segment = FALSE;
1100 demux->running = TRUE;
1101 /* and restart the task in case it got paused explicitely or by
1102 * the FLUSH_START event we pushed out. */
1103 gst_pad_start_task (demux->sinkpad, (GstTaskFunction) gst_dvdemux_loop,
1106 /* and release the lock again so we can continue streaming */
1107 GST_PAD_STREAM_UNLOCK (demux->sinkpad);
1114 GST_DEBUG_OBJECT (demux, "negative playback rate %lf not supported.", rate);
1119 GST_DEBUG_OBJECT (demux, "cannot convert to TIME format, seek aborted.");
1125 gst_dvdemux_send_event (GstElement * element, GstEvent * event)
1127 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1128 gboolean res = FALSE;
1130 switch (GST_EVENT_TYPE (event)) {
1131 case GST_EVENT_SEEK:
1133 /* checking header and configuring the seek must be atomic */
1134 GST_OBJECT_LOCK (dvdemux);
1135 if (g_atomic_int_get (&dvdemux->found_header) == 0) {
1138 event_p = &dvdemux->seek_event;
1140 /* We don't have pads yet. Keep the event. */
1141 GST_INFO_OBJECT (dvdemux, "Keeping the seek event for later");
1143 gst_event_replace (event_p, event);
1144 GST_OBJECT_UNLOCK (dvdemux);
1148 GST_OBJECT_UNLOCK (dvdemux);
1150 if (dvdemux->seek_handler) {
1151 res = dvdemux->seek_handler (dvdemux, dvdemux->videosrcpad, event);
1152 gst_event_unref (event);
1158 res = GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
1165 /* handle an event on the source pad, it's most likely a seek */
1167 gst_dvdemux_handle_src_event (GstPad * pad, GstEvent * event)
1169 gboolean res = TRUE;
1170 GstDVDemux *dvdemux;
1172 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1174 switch (GST_EVENT_TYPE (event)) {
1175 case GST_EVENT_SEEK:
1176 /* seek handler is installed based on scheduling mode */
1177 if (dvdemux->seek_handler)
1178 res = dvdemux->seek_handler (dvdemux, pad, event);
1183 /* we can't really (yet) do QoS */
1186 case GST_EVENT_NAVIGATION:
1187 /* no navigation either... */
1191 res = gst_pad_push_event (dvdemux->sinkpad, event);
1196 gst_event_unref (event);
1198 gst_object_unref (dvdemux);
1203 /* does not take ownership of buffer */
1204 static GstFlowReturn
1205 gst_dvdemux_demux_audio (GstDVDemux * dvdemux, GstBuffer * buffer,
1212 data = GST_BUFFER_DATA (buffer);
1214 dv_decode_full_audio (dvdemux->decoder, data, dvdemux->audio_buffers);
1216 if (G_LIKELY ((num_samples = dv_get_num_samples (dvdemux->decoder)) > 0)) {
1220 gint frequency, channels;
1222 if (G_UNLIKELY (dvdemux->audiosrcpad == NULL))
1223 dvdemux->audiosrcpad = gst_dvdemux_add_pad (dvdemux, &audio_src_temp);
1225 /* get initial format or check if format changed */
1226 frequency = dv_get_frequency (dvdemux->decoder);
1227 channels = dv_get_num_channels (dvdemux->decoder);
1229 if (G_UNLIKELY ((frequency != dvdemux->frequency)
1230 || (channels != dvdemux->channels))) {
1233 dvdemux->frequency = frequency;
1234 dvdemux->channels = channels;
1236 /* and set new caps */
1237 caps = gst_caps_new_simple ("audio/x-raw-int",
1238 "rate", G_TYPE_INT, frequency,
1239 "depth", G_TYPE_INT, 16,
1240 "width", G_TYPE_INT, 16,
1241 "signed", G_TYPE_BOOLEAN, TRUE,
1242 "channels", G_TYPE_INT, channels,
1243 "endianness", G_TYPE_INT, G_BYTE_ORDER, NULL);
1244 gst_pad_set_caps (dvdemux->audiosrcpad, caps);
1245 gst_caps_unref (caps);
1248 outbuf = gst_buffer_new_and_alloc (num_samples *
1249 sizeof (gint16) * dvdemux->channels);
1251 a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
1253 for (i = 0; i < num_samples; i++) {
1254 for (j = 0; j < dvdemux->channels; j++) {
1255 *(a_ptr++) = dvdemux->audio_buffers[j][i];
1259 GST_DEBUG ("pushing audio %" GST_TIME_FORMAT,
1260 GST_TIME_ARGS (dvdemux->time_segment.last_stop));
1262 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.last_stop;
1263 GST_BUFFER_DURATION (outbuf) = duration;
1264 GST_BUFFER_OFFSET (outbuf) = dvdemux->audio_offset;
1265 dvdemux->audio_offset += num_samples;
1266 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->audio_offset;
1268 if (dvdemux->new_media)
1269 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1270 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dvdemux->audiosrcpad));
1272 ret = gst_pad_push (dvdemux->audiosrcpad, outbuf);
1281 /* takes ownership of buffer */
1282 static GstFlowReturn
1283 gst_dvdemux_demux_video (GstDVDemux * dvdemux, GstBuffer * buffer,
1289 GstFlowReturn ret = GST_FLOW_OK;
1291 if (G_UNLIKELY (dvdemux->videosrcpad == NULL))
1292 dvdemux->videosrcpad = gst_dvdemux_add_pad (dvdemux, &video_src_temp);
1295 /* framerate is already up-to-date */
1296 height = dvdemux->decoder->height;
1297 wide = dv_format_wide (dvdemux->decoder);
1299 /* see if anything changed */
1300 if (G_UNLIKELY ((dvdemux->height != height) || dvdemux->wide != wide)) {
1304 dvdemux->height = height;
1305 dvdemux->wide = wide;
1307 if (dvdemux->decoder->system == e_dv_system_625_50) {
1309 par_x = PAL_WIDE_PAR_X;
1310 par_y = PAL_WIDE_PAR_Y;
1312 par_x = PAL_NORMAL_PAR_X;
1313 par_y = PAL_NORMAL_PAR_Y;
1317 par_x = NTSC_WIDE_PAR_X;
1318 par_y = NTSC_WIDE_PAR_Y;
1320 par_x = NTSC_NORMAL_PAR_X;
1321 par_y = NTSC_NORMAL_PAR_Y;
1325 caps = gst_caps_new_simple ("video/x-dv",
1326 "systemstream", G_TYPE_BOOLEAN, FALSE,
1327 "width", G_TYPE_INT, 720,
1328 "height", G_TYPE_INT, height,
1329 "framerate", GST_TYPE_FRACTION, dvdemux->framerate_numerator,
1330 dvdemux->framerate_denominator,
1331 "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
1332 gst_pad_set_caps (dvdemux->videosrcpad, caps);
1333 gst_caps_unref (caps);
1336 /* takes ownership of buffer here, we just need to modify
1338 outbuf = gst_buffer_make_metadata_writable (buffer);
1340 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.last_stop;
1341 GST_BUFFER_OFFSET (outbuf) = dvdemux->video_offset;
1342 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->video_offset + 1;
1343 GST_BUFFER_DURATION (outbuf) = duration;
1345 if (dvdemux->new_media)
1346 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1347 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dvdemux->videosrcpad));
1349 GST_DEBUG ("pushing video %" GST_TIME_FORMAT,
1350 GST_TIME_ARGS (dvdemux->time_segment.last_stop));
1352 ret = gst_pad_push (dvdemux->videosrcpad, outbuf);
1354 dvdemux->video_offset++;
1360 get_ssyb_offset (int dif, int ssyb)
1364 offset = dif * 12000; /* to dif */
1365 offset += 80 * (1 + (ssyb / 6)); /* to subcode pack */
1366 offset += 3; /* past header */
1367 offset += 8 * (ssyb % 6); /* to ssyb */
1373 gst_dvdemux_get_timecode (GstDVDemux * dvdemux, GstBuffer * buffer,
1374 GstSMPTETimeCode * timecode)
1376 guint8 *data = GST_BUFFER_DATA (buffer);
1379 int n_difs = dvdemux->decoder->num_dif_seqs;
1381 for (dif = 0; dif < n_difs; dif++) {
1382 offset = get_ssyb_offset (dif, 3);
1383 if (data[offset + 3] == 0x13) {
1384 timecode->frames = ((data[offset + 4] >> 4) & 0x3) * 10 +
1385 (data[offset + 4] & 0xf);
1386 timecode->seconds = ((data[offset + 5] >> 4) & 0x3) * 10 +
1387 (data[offset + 5] & 0xf);
1388 timecode->minutes = ((data[offset + 6] >> 4) & 0x3) * 10 +
1389 (data[offset + 6] & 0xf);
1390 timecode->hours = ((data[offset + 7] >> 4) & 0x3) * 10 +
1391 (data[offset + 7] & 0xf);
1392 GST_DEBUG ("got timecode %" GST_SMPTE_TIME_CODE_FORMAT,
1393 GST_SMPTE_TIME_CODE_ARGS (timecode));
1402 gst_dvdemux_is_new_media (GstDVDemux * dvdemux, GstBuffer * buffer)
1404 guint8 *data = GST_BUFFER_DATA (buffer);
1409 n_difs = dvdemux->decoder->num_dif_seqs;
1411 for (dif = 0; dif < n_difs; dif++) {
1413 aaux_offset = (dif * 12000) + (6 + 16 * 1) * 80 + 3;
1415 aaux_offset = (dif * 12000) + (6 + 16 * 4) * 80 + 3;
1417 if (data[aaux_offset + 0] == 0x51) {
1418 if ((data[aaux_offset + 2] & 0x80) == 0)
1426 /* takes ownership of buffer */
1427 static GstFlowReturn
1428 gst_dvdemux_demux_frame (GstDVDemux * dvdemux, GstBuffer * buffer)
1430 GstClockTime next_ts;
1431 GstFlowReturn aret, vret, ret;
1434 GstSMPTETimeCode timecode;
1437 if (G_UNLIKELY (dvdemux->need_segment)) {
1441 /* convert to time and store as start/end_timestamp */
1442 format = GST_FORMAT_TIME;
1443 if (!(gst_dvdemux_convert_sink_pair (dvdemux,
1444 GST_FORMAT_BYTES, dvdemux->byte_segment.start,
1445 dvdemux->byte_segment.stop, format,
1446 &dvdemux->time_segment.start, &dvdemux->time_segment.stop)))
1449 dvdemux->time_segment.rate = dvdemux->byte_segment.rate;
1450 dvdemux->time_segment.abs_rate = dvdemux->byte_segment.abs_rate;
1451 dvdemux->time_segment.last_stop = dvdemux->time_segment.start;
1453 /* calculate current frame number */
1454 format = GST_FORMAT_DEFAULT;
1455 if (!(gst_dvdemux_src_convert (dvdemux, dvdemux->videosrcpad,
1456 GST_FORMAT_TIME, dvdemux->time_segment.start,
1457 &format, &dvdemux->frame_offset)))
1460 GST_DEBUG_OBJECT (dvdemux, "sending segment start: %" GST_TIME_FORMAT
1461 ", stop: %" GST_TIME_FORMAT ", time: %" GST_TIME_FORMAT,
1462 GST_TIME_ARGS (dvdemux->time_segment.start),
1463 GST_TIME_ARGS (dvdemux->time_segment.stop),
1464 GST_TIME_ARGS (dvdemux->time_segment.start));
1466 event = gst_event_new_new_segment (FALSE, dvdemux->byte_segment.rate,
1467 GST_FORMAT_TIME, dvdemux->time_segment.start,
1468 dvdemux->time_segment.stop, dvdemux->time_segment.start);
1469 gst_dvdemux_push_event (dvdemux, event);
1471 dvdemux->need_segment = FALSE;
1474 gst_dvdemux_get_timecode (dvdemux, buffer, &timecode);
1475 gst_smpte_time_code_get_frame_number (
1476 (dvdemux->decoder->system == e_dv_system_625_50) ?
1477 GST_SMPTE_TIME_CODE_SYSTEM_25 : GST_SMPTE_TIME_CODE_SYSTEM_30,
1478 &frame_number, &timecode);
1480 next_ts = gst_util_uint64_scale_int (
1481 (dvdemux->frame_offset + 1) * GST_SECOND,
1482 dvdemux->framerate_denominator, dvdemux->framerate_numerator);
1483 duration = next_ts - dvdemux->time_segment.last_stop;
1485 data = GST_BUFFER_DATA (buffer);
1487 dv_parse_packs (dvdemux->decoder, data);
1488 dvdemux->new_media = FALSE;
1489 if (gst_dvdemux_is_new_media (dvdemux, buffer) &&
1490 dvdemux->frames_since_new_media > 2) {
1491 dvdemux->new_media = TRUE;
1492 dvdemux->frames_since_new_media = 0;
1494 dvdemux->frames_since_new_media++;
1496 /* does not take ownership of buffer */
1497 aret = ret = gst_dvdemux_demux_audio (dvdemux, buffer, duration);
1498 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)) {
1499 gst_buffer_unref (buffer);
1503 /* takes ownership of buffer */
1504 vret = ret = gst_dvdemux_demux_video (dvdemux, buffer, duration);
1505 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED))
1508 /* if both are not linked, we stop */
1509 if (G_UNLIKELY (aret == GST_FLOW_NOT_LINKED && vret == GST_FLOW_NOT_LINKED)) {
1510 ret = GST_FLOW_NOT_LINKED;
1514 gst_segment_set_last_stop (&dvdemux->time_segment, GST_FORMAT_TIME, next_ts);
1515 dvdemux->frame_offset++;
1517 /* check for the end of the segment */
1518 if (dvdemux->time_segment.stop != -1 && next_ts > dvdemux->time_segment.stop)
1519 ret = GST_FLOW_UNEXPECTED;
1529 GST_DEBUG ("error generating new_segment event");
1530 gst_buffer_unref (buffer);
1531 return GST_FLOW_ERROR;
1535 /* flush any remaining data in the adapter, used in chain based scheduling mode */
1536 static GstFlowReturn
1537 gst_dvdemux_flush (GstDVDemux * dvdemux)
1539 GstFlowReturn ret = GST_FLOW_OK;
1541 while (gst_adapter_available (dvdemux->adapter) >= dvdemux->frame_len) {
1545 /* get the accumulated bytes */
1546 data = gst_adapter_peek (dvdemux->adapter, dvdemux->frame_len);
1548 /* parse header to know the length and other params */
1549 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0))
1550 goto parse_header_error;
1552 /* after parsing the header we know the length of the data */
1553 length = dvdemux->frame_len = dvdemux->decoder->frame_size;
1554 if (dvdemux->decoder->system == e_dv_system_625_50) {
1555 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1556 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1558 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1559 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1561 g_atomic_int_set (&dvdemux->found_header, 1);
1563 /* let demux_video set the height, it needs to detect when things change so
1564 * it can reset caps */
1566 /* if we still have enough for a frame, start decoding */
1567 if (G_LIKELY (gst_adapter_available (dvdemux->adapter) >= length)) {
1570 data = gst_adapter_take (dvdemux->adapter, length);
1572 /* create buffer for the remainder of the code */
1573 buffer = gst_buffer_new ();
1574 GST_BUFFER_DATA (buffer) = (guint8 *) data;
1575 GST_BUFFER_SIZE (buffer) = length;
1576 GST_BUFFER_MALLOCDATA (buffer) = (guint8 *) data;
1578 /* and decode the buffer, takes ownership */
1579 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1580 if (G_UNLIKELY (ret != GST_FLOW_OK))
1590 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1591 (NULL), ("Error parsing DV header"));
1592 return GST_FLOW_ERROR;
1596 /* streaming operation:
1598 * accumulate data until we have a frame, then decode.
1600 static GstFlowReturn
1601 gst_dvdemux_chain (GstPad * pad, GstBuffer * buffer)
1603 GstDVDemux *dvdemux;
1605 GstClockTime timestamp;
1607 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1609 /* a discontinuity in the stream, we need to get rid of
1610 * accumulated data in the adapter and assume a new frame
1611 * starts after the discontinuity */
1612 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)))
1613 gst_adapter_clear (dvdemux->adapter);
1615 /* a timestamp always should be respected */
1616 timestamp = GST_BUFFER_TIMESTAMP (buffer);
1617 if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
1618 gst_segment_set_last_stop (&dvdemux->time_segment, GST_FORMAT_TIME,
1620 /* FIXME, adjust frame_offset and other counters */
1623 gst_adapter_push (dvdemux->adapter, buffer);
1625 /* Apparently dv_parse_header can read from the body of the frame
1626 * too, so it needs more than header_size bytes. Wacky!
1628 if (G_UNLIKELY (dvdemux->frame_len == -1)) {
1629 /* if we don't know the length of a frame, we assume it is
1630 * the NTSC_BUFFER length, as this is enough to figure out
1631 * if this is PAL or NTSC */
1632 dvdemux->frame_len = NTSC_BUFFER;
1635 /* and try to flush pending frames */
1636 ret = gst_dvdemux_flush (dvdemux);
1638 gst_object_unref (dvdemux);
1643 /* pull based operation.
1645 * Read header first to figure out the frame size. Then read
1646 * and decode full frames.
1649 gst_dvdemux_loop (GstPad * pad)
1652 GstDVDemux *dvdemux;
1653 GstBuffer *buffer = NULL;
1656 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1658 if (G_UNLIKELY (g_atomic_int_get (&dvdemux->found_header) == 0)) {
1659 GST_DEBUG_OBJECT (dvdemux, "pulling first buffer");
1660 /* pull in NTSC sized buffer to figure out the frame
1662 ret = gst_pad_pull_range (dvdemux->sinkpad,
1663 dvdemux->byte_segment.last_stop, NTSC_BUFFER, &buffer);
1664 if (G_UNLIKELY (ret != GST_FLOW_OK))
1667 /* check buffer size, don't want to read small buffers */
1668 if (G_UNLIKELY (GST_BUFFER_SIZE (buffer) < NTSC_BUFFER))
1671 data = GST_BUFFER_DATA (buffer);
1673 /* parse header to know the length and other params */
1674 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0))
1675 goto parse_header_error;
1677 /* after parsing the header we know the length of the data */
1678 dvdemux->frame_len = dvdemux->decoder->frame_size;
1679 if (dvdemux->decoder->system == e_dv_system_625_50) {
1680 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1681 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1683 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1684 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1686 dvdemux->need_segment = TRUE;
1688 /* see if we need to read a larger part */
1689 if (dvdemux->frame_len != NTSC_BUFFER) {
1690 gst_buffer_unref (buffer);
1697 /* setting header and prrforming the seek must be atomic */
1698 GST_OBJECT_LOCK (dvdemux);
1699 /* got header now */
1700 g_atomic_int_set (&dvdemux->found_header, 1);
1702 /* now perform pending seek if any. */
1703 event = dvdemux->seek_event;
1705 gst_event_ref (event);
1706 GST_OBJECT_UNLOCK (dvdemux);
1709 if (!gst_dvdemux_handle_pull_seek (dvdemux, dvdemux->videosrcpad,
1711 GST_ELEMENT_WARNING (dvdemux, STREAM, DECODE, (NULL),
1712 ("Error perfoming initial seek"));
1714 gst_event_unref (event);
1716 /* and we need to pull a new buffer in all cases. */
1718 gst_buffer_unref (buffer);
1726 if (G_UNLIKELY (dvdemux->pending_segment)) {
1728 /* now send the newsegment */
1729 GST_DEBUG_OBJECT (dvdemux, "Sending newsegment from");
1731 gst_dvdemux_push_event (dvdemux, dvdemux->pending_segment);
1732 dvdemux->pending_segment = NULL;
1735 if (G_LIKELY (buffer == NULL)) {
1736 GST_DEBUG_OBJECT (dvdemux, "pulling buffer at offset %" G_GINT64_FORMAT,
1737 dvdemux->byte_segment.last_stop);
1739 ret = gst_pad_pull_range (dvdemux->sinkpad,
1740 dvdemux->byte_segment.last_stop, dvdemux->frame_len, &buffer);
1741 if (ret != GST_FLOW_OK)
1744 /* check buffer size, don't want to read small buffers */
1745 if (GST_BUFFER_SIZE (buffer) < dvdemux->frame_len)
1748 /* and decode the buffer */
1749 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1750 if (G_UNLIKELY (ret != GST_FLOW_OK))
1753 /* and position ourselves for the next buffer */
1754 dvdemux->byte_segment.last_stop += dvdemux->frame_len;
1757 gst_object_unref (dvdemux);
1764 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1765 (NULL), ("Error parsing DV header"));
1766 gst_buffer_unref (buffer);
1767 dvdemux->running = FALSE;
1768 gst_pad_pause_task (dvdemux->sinkpad);
1769 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1774 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1775 (NULL), ("Error reading buffer"));
1776 gst_buffer_unref (buffer);
1777 dvdemux->running = FALSE;
1778 gst_pad_pause_task (dvdemux->sinkpad);
1779 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1784 GST_INFO_OBJECT (dvdemux, "pausing task, %s", gst_flow_get_name (ret));
1785 dvdemux->running = FALSE;
1786 gst_pad_pause_task (dvdemux->sinkpad);
1787 if (ret == GST_FLOW_UNEXPECTED) {
1788 GST_LOG_OBJECT (dvdemux, "got eos");
1789 /* perform EOS logic */
1790 if (dvdemux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1791 gst_element_post_message (GST_ELEMENT (dvdemux),
1792 gst_message_new_segment_done (GST_OBJECT_CAST (dvdemux),
1793 dvdemux->time_segment.format, dvdemux->time_segment.last_stop));
1795 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1797 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
1798 /* for fatal errors or not-linked we post an error message */
1799 GST_ELEMENT_ERROR (dvdemux, STREAM, FAILED,
1800 (NULL), ("streaming stopped, reason %s", gst_flow_get_name (ret)));
1801 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1808 gst_dvdemux_sink_activate_push (GstPad * sinkpad, gboolean active)
1810 GstDVDemux *demux = GST_DVDEMUX (gst_pad_get_parent (sinkpad));
1813 demux->seek_handler = gst_dvdemux_handle_push_seek;
1815 demux->seek_handler = NULL;
1817 gst_object_unref (demux);
1823 gst_dvdemux_sink_activate_pull (GstPad * sinkpad, gboolean active)
1825 GstDVDemux *demux = GST_DVDEMUX (gst_pad_get_parent (sinkpad));
1828 demux->running = TRUE;
1829 demux->seek_handler = gst_dvdemux_handle_pull_seek;
1830 gst_pad_start_task (sinkpad, (GstTaskFunction) gst_dvdemux_loop, sinkpad);
1832 demux->seek_handler = NULL;
1833 gst_pad_stop_task (sinkpad);
1834 demux->running = FALSE;
1837 gst_object_unref (demux);
1842 /* decide on push or pull based scheduling */
1844 gst_dvdemux_sink_activate (GstPad * sinkpad)
1848 if (gst_pad_check_pull_range (sinkpad))
1849 ret = gst_pad_activate_pull (sinkpad, TRUE);
1851 ret = gst_pad_activate_push (sinkpad, TRUE);
1856 static GstStateChangeReturn
1857 gst_dvdemux_change_state (GstElement * element, GstStateChange transition)
1859 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1860 GstStateChangeReturn ret;
1862 switch (transition) {
1863 case GST_STATE_CHANGE_NULL_TO_READY:
1865 case GST_STATE_CHANGE_READY_TO_PAUSED:
1866 dvdemux->decoder = dv_decoder_new (0, FALSE, FALSE);
1867 dv_set_error_log (dvdemux->decoder, NULL);
1868 gst_dvdemux_reset (dvdemux);
1870 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1876 ret = parent_class->change_state (element, transition);
1878 switch (transition) {
1879 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1881 case GST_STATE_CHANGE_PAUSED_TO_READY:
1882 gst_adapter_clear (dvdemux->adapter);
1883 dv_decoder_free (dvdemux->decoder);
1884 dvdemux->decoder = NULL;
1886 gst_dvdemux_remove_pads (dvdemux);
1888 case GST_STATE_CHANGE_READY_TO_NULL:
1892 event_p = &dvdemux->seek_event;
1893 gst_event_replace (event_p, NULL);
1894 if (dvdemux->pending_segment)
1895 gst_event_unref (dvdemux->pending_segment);
1896 dvdemux->pending_segment = NULL;