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_pad_template (element_class,
178 gst_static_pad_template_get (&sink_temp));
179 gst_element_class_add_pad_template (element_class,
180 gst_static_pad_template_get (&video_src_temp));
181 gst_element_class_add_pad_template (element_class,
182 gst_static_pad_template_get (&audio_src_temp));
184 gst_element_class_set_details_simple (element_class,
185 "DV system stream demuxer", "Codec/Demuxer",
186 "Uses libdv to separate DV audio from DV video (libdv.sourceforge.net)",
187 "Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim@fluendo.com>");
189 GST_DEBUG_CATEGORY_INIT (dvdemux_debug, "dvdemux", 0, "DV demuxer element");
193 gst_dvdemux_class_init (GstDVDemuxClass * klass)
195 GObjectClass *gobject_class;
196 GstElementClass *gstelement_class;
198 gobject_class = (GObjectClass *) klass;
199 gstelement_class = (GstElementClass *) klass;
201 gobject_class->finalize = gst_dvdemux_finalize;
203 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_dvdemux_change_state);
204 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_dvdemux_send_event);
208 gst_dvdemux_init (GstDVDemux * dvdemux, GstDVDemuxClass * g_class)
212 dvdemux->sinkpad = gst_pad_new_from_static_template (&sink_temp, "sink");
213 /* we can operate in pull and push mode so we install
214 * a custom activate function */
215 gst_pad_set_activate_function (dvdemux->sinkpad,
216 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate));
217 /* the function to activate in push mode */
218 gst_pad_set_activatepush_function (dvdemux->sinkpad,
219 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate_push));
220 /* the function to activate in pull mode */
221 gst_pad_set_activatepull_function (dvdemux->sinkpad,
222 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate_pull));
223 /* for push mode, this is the chain function */
224 gst_pad_set_chain_function (dvdemux->sinkpad,
225 GST_DEBUG_FUNCPTR (gst_dvdemux_chain));
226 /* handling events (in push mode only) */
227 gst_pad_set_event_function (dvdemux->sinkpad,
228 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_sink_event));
229 /* query functions */
230 gst_pad_set_query_function (dvdemux->sinkpad,
231 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_query));
232 gst_pad_set_query_type_function (dvdemux->sinkpad,
233 GST_DEBUG_FUNCPTR (gst_dvdemux_get_sink_query_types));
235 /* now add the pad */
236 gst_element_add_pad (GST_ELEMENT (dvdemux), dvdemux->sinkpad);
238 dvdemux->adapter = gst_adapter_new ();
240 /* we need 4 temp buffers for audio decoding which are of a static
241 * size and which we can allocate here */
242 for (i = 0; i < 4; i++) {
243 dvdemux->audio_buffers[i] =
244 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
249 gst_dvdemux_finalize (GObject * object)
254 dvdemux = GST_DVDEMUX (object);
256 g_object_unref (dvdemux->adapter);
258 /* clean up temp audio buffers */
259 for (i = 0; i < 4; i++) {
260 g_free (dvdemux->audio_buffers[i]);
263 G_OBJECT_CLASS (parent_class)->finalize (object);
266 /* reset to default values before starting streaming */
268 gst_dvdemux_reset (GstDVDemux * dvdemux)
270 dvdemux->frame_offset = 0;
271 dvdemux->audio_offset = 0;
272 dvdemux->video_offset = 0;
273 dvdemux->framecount = 0;
274 g_atomic_int_set (&dvdemux->found_header, 0);
275 dvdemux->frame_len = -1;
276 dvdemux->need_segment = FALSE;
277 dvdemux->new_media = FALSE;
278 dvdemux->framerate_numerator = 0;
279 dvdemux->framerate_denominator = 0;
281 dvdemux->frequency = 0;
282 dvdemux->channels = 0;
283 dvdemux->wide = FALSE;
284 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
285 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
289 gst_dvdemux_add_pad (GstDVDemux * dvdemux, GstStaticPadTemplate * template)
291 gboolean no_more_pads;
294 pad = gst_pad_new_from_static_template (template, template->name_template);
296 gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_dvdemux_src_query));
298 gst_pad_set_query_type_function (pad,
299 GST_DEBUG_FUNCPTR (gst_dvdemux_get_src_query_types));
300 gst_pad_set_event_function (pad,
301 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_src_event));
302 gst_pad_use_fixed_caps (pad);
303 gst_pad_set_active (pad, TRUE);
304 gst_element_add_pad (GST_ELEMENT (dvdemux), pad);
307 (dvdemux->videosrcpad != NULL && template == &audio_src_temp) ||
308 (dvdemux->audiosrcpad != NULL && template == &video_src_temp);
311 gst_element_no_more_pads (GST_ELEMENT (dvdemux));
313 gst_pad_push_event (pad, gst_event_new_new_segment (FALSE,
314 dvdemux->byte_segment.rate, GST_FORMAT_TIME,
315 dvdemux->time_segment.start, dvdemux->time_segment.stop,
316 dvdemux->time_segment.start));
319 gst_element_found_tags (GST_ELEMENT (dvdemux),
320 gst_tag_list_new_full (GST_TAG_CONTAINER_FORMAT, "DV", NULL));
327 gst_dvdemux_remove_pads (GstDVDemux * dvdemux)
329 if (dvdemux->videosrcpad) {
330 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->videosrcpad);
331 dvdemux->videosrcpad = NULL;
333 if (dvdemux->audiosrcpad) {
334 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->audiosrcpad);
335 dvdemux->audiosrcpad = NULL;
340 gst_dvdemux_src_convert (GstDVDemux * dvdemux, GstPad * pad,
341 GstFormat src_format, gint64 src_value, GstFormat * dest_format,
346 if (*dest_format == src_format || src_value == -1) {
347 *dest_value = src_value;
351 if (dvdemux->frame_len <= 0)
354 if (dvdemux->decoder == NULL)
357 GST_INFO_OBJECT (pad,
358 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
359 src_value, src_format, *dest_format);
361 switch (src_format) {
362 case GST_FORMAT_BYTES:
363 switch (*dest_format) {
364 case GST_FORMAT_DEFAULT:
365 if (pad == dvdemux->videosrcpad)
366 *dest_value = src_value / dvdemux->frame_len;
367 else if (pad == dvdemux->audiosrcpad)
368 *dest_value = src_value / (2 * dvdemux->channels);
370 case GST_FORMAT_TIME:
371 *dest_format = GST_FORMAT_TIME;
372 if (pad == dvdemux->videosrcpad)
373 *dest_value = gst_util_uint64_scale (src_value,
374 GST_SECOND * dvdemux->framerate_denominator,
375 dvdemux->frame_len * dvdemux->framerate_numerator);
376 else if (pad == dvdemux->audiosrcpad)
377 *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND,
378 2 * dvdemux->frequency * dvdemux->channels);
384 case GST_FORMAT_TIME:
385 switch (*dest_format) {
386 case GST_FORMAT_BYTES:
387 if (pad == dvdemux->videosrcpad)
388 *dest_value = gst_util_uint64_scale (src_value,
389 dvdemux->frame_len * dvdemux->framerate_numerator,
390 dvdemux->framerate_denominator * GST_SECOND);
391 else if (pad == dvdemux->audiosrcpad)
392 *dest_value = gst_util_uint64_scale_int (src_value,
393 2 * dvdemux->frequency * dvdemux->channels, GST_SECOND);
395 case GST_FORMAT_DEFAULT:
396 if (pad == dvdemux->videosrcpad) {
398 *dest_value = gst_util_uint64_scale (src_value,
399 dvdemux->framerate_numerator,
400 dvdemux->framerate_denominator * GST_SECOND);
403 } else if (pad == dvdemux->audiosrcpad) {
404 *dest_value = gst_util_uint64_scale (src_value,
405 dvdemux->frequency, GST_SECOND);
412 case GST_FORMAT_DEFAULT:
413 switch (*dest_format) {
414 case GST_FORMAT_TIME:
415 if (pad == dvdemux->videosrcpad) {
416 *dest_value = gst_util_uint64_scale (src_value,
417 GST_SECOND * dvdemux->framerate_denominator,
418 dvdemux->framerate_numerator);
419 } else if (pad == dvdemux->audiosrcpad) {
421 *dest_value = gst_util_uint64_scale (src_value,
422 GST_SECOND, dvdemux->frequency);
427 case GST_FORMAT_BYTES:
428 if (pad == dvdemux->videosrcpad) {
429 *dest_value = src_value * dvdemux->frame_len;
430 } else if (pad == dvdemux->audiosrcpad) {
431 *dest_value = src_value * 2 * dvdemux->channels;
443 GST_INFO_OBJECT (pad,
444 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
445 *dest_format, *dest_value, res);
451 GST_INFO ("source conversion failed");
457 gst_dvdemux_sink_convert (GstDVDemux * dvdemux, GstFormat src_format,
458 gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
462 GST_DEBUG_OBJECT (dvdemux, "%d -> %d", src_format, *dest_format);
463 GST_INFO_OBJECT (dvdemux,
464 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
465 src_value, src_format, *dest_format);
467 if (*dest_format == GST_FORMAT_DEFAULT)
468 *dest_format = GST_FORMAT_TIME;
470 if (*dest_format == src_format || src_value == -1) {
471 *dest_value = src_value;
475 if (dvdemux->frame_len <= 0)
478 switch (src_format) {
479 case GST_FORMAT_BYTES:
480 switch (*dest_format) {
481 case GST_FORMAT_TIME:
485 /* get frame number, rounds down so don't combine this
486 * line and the next line. */
487 frame = src_value / dvdemux->frame_len;
489 *dest_value = gst_util_uint64_scale (frame,
490 GST_SECOND * dvdemux->framerate_denominator,
491 dvdemux->framerate_numerator);
498 case GST_FORMAT_TIME:
499 switch (*dest_format) {
500 case GST_FORMAT_BYTES:
504 /* calculate the frame */
506 gst_util_uint64_scale (src_value, dvdemux->framerate_numerator,
507 dvdemux->framerate_denominator * GST_SECOND);
509 /* calculate the offset from the rounded frame */
510 *dest_value = frame * dvdemux->frame_len;
520 GST_INFO_OBJECT (dvdemux,
521 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
522 *dest_format, *dest_value, res);
529 GST_INFO_OBJECT (dvdemux, "sink conversion failed");
534 static const GstQueryType *
535 gst_dvdemux_get_src_query_types (GstPad * pad)
537 static const GstQueryType src_query_types[] = {
544 return src_query_types;
548 gst_dvdemux_src_query (GstPad * pad, GstQuery * query)
553 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
555 switch (GST_QUERY_TYPE (query)) {
556 case GST_QUERY_POSITION:
561 /* get target format */
562 gst_query_parse_position (query, &format, NULL);
564 /* bring the position to the requested format. */
565 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
566 GST_FORMAT_TIME, dvdemux->time_segment.last_stop,
569 gst_query_set_position (query, format, cur);
572 case GST_QUERY_DURATION:
578 /* First ask the peer in the original format */
579 if (!gst_pad_peer_query (dvdemux->sinkpad, query)) {
580 /* get target format */
581 gst_query_parse_duration (query, &format, NULL);
583 /* change query to bytes to perform on peer */
584 gst_query_set_duration (query, GST_FORMAT_BYTES, -1);
586 /* Now ask the peer in BYTES format and try to convert */
587 if (!gst_pad_peer_query (dvdemux->sinkpad, query)) {
591 /* get peer total length */
592 gst_query_parse_duration (query, NULL, &end);
594 /* convert end to requested format */
597 if (!(res = gst_dvdemux_sink_convert (dvdemux,
598 GST_FORMAT_BYTES, end, &format2, &end))) {
601 gst_query_set_duration (query, format, end);
606 case GST_QUERY_CONVERT:
608 GstFormat src_fmt, dest_fmt;
609 gint64 src_val, dest_val;
611 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
613 gst_dvdemux_src_convert (dvdemux, pad, src_fmt, src_val,
614 &dest_fmt, &dest_val)))
616 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
620 res = gst_pad_query_default (pad, query);
623 gst_object_unref (dvdemux);
630 gst_object_unref (dvdemux);
631 GST_DEBUG ("error source query");
636 static const GstQueryType *
637 gst_dvdemux_get_sink_query_types (GstPad * pad)
639 static const GstQueryType sink_query_types[] = {
644 return sink_query_types;
648 gst_dvdemux_sink_query (GstPad * pad, GstQuery * query)
653 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
655 switch (GST_QUERY_TYPE (query)) {
656 case GST_QUERY_CONVERT:
658 GstFormat src_fmt, dest_fmt;
659 gint64 src_val, dest_val;
661 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
663 gst_dvdemux_sink_convert (dvdemux, src_fmt, src_val, &dest_fmt,
666 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
670 res = gst_pad_query_default (pad, query);
673 gst_object_unref (dvdemux);
680 gst_object_unref (dvdemux);
681 GST_DEBUG ("error handling sink query");
686 /* takes ownership of the event */
688 gst_dvdemux_push_event (GstDVDemux * dvdemux, GstEvent * event)
690 gboolean res = FALSE;
692 if (dvdemux->videosrcpad) {
693 gst_event_ref (event);
694 res |= gst_pad_push_event (dvdemux->videosrcpad, event);
697 if (dvdemux->audiosrcpad)
698 res |= gst_pad_push_event (dvdemux->audiosrcpad, event);
700 gst_event_unref (event);
706 gst_dvdemux_handle_sink_event (GstPad * pad, GstEvent * event)
708 GstDVDemux *dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
711 switch (GST_EVENT_TYPE (event)) {
712 case GST_EVENT_FLUSH_START:
713 /* we are not blocking on anything exect the push() calls
714 * to the peer which will be unblocked by forwarding the
716 res = gst_dvdemux_push_event (dvdemux, event);
718 case GST_EVENT_FLUSH_STOP:
719 gst_adapter_clear (dvdemux->adapter);
720 GST_DEBUG ("cleared adapter");
721 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
722 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
723 res = gst_dvdemux_push_event (dvdemux, event);
725 case GST_EVENT_NEWSEGMENT:
730 gint64 start, stop, time;
732 /* parse byte start and stop positions */
733 gst_event_parse_new_segment (event, &update, &rate, &format,
734 &start, &stop, &time);
737 case GST_FORMAT_BYTES:
738 gst_segment_set_newsegment (&dvdemux->byte_segment, update,
739 rate, format, start, stop, time);
741 /* the update can always be sent */
745 update = gst_event_new_new_segment (TRUE,
746 dvdemux->time_segment.rate, dvdemux->time_segment.format,
747 dvdemux->time_segment.start, dvdemux->time_segment.last_stop,
748 dvdemux->time_segment.time);
750 gst_dvdemux_push_event (dvdemux, update);
752 /* and queue a SEGMENT before sending the next set of buffers, we
753 * cannot convert to time yet as we might not know the size of the
755 dvdemux->need_segment = TRUE;
757 gst_event_unref (event);
759 case GST_FORMAT_TIME:
760 gst_segment_set_newsegment (&dvdemux->time_segment, update,
761 rate, format, start, stop, time);
763 /* and we can just forward this time event */
764 res = gst_dvdemux_push_event (dvdemux, event);
767 gst_event_unref (event);
768 /* cannot accept this format */
775 /* flush any pending data, should be nothing left. */
776 gst_dvdemux_flush (dvdemux);
778 res = gst_dvdemux_push_event (dvdemux, event);
779 /* and clear the adapter */
780 gst_adapter_clear (dvdemux->adapter);
783 res = gst_dvdemux_push_event (dvdemux, event);
787 gst_object_unref (dvdemux);
792 /* convert a pair of values on the given srcpad */
794 gst_dvdemux_convert_src_pair (GstDVDemux * dvdemux, GstPad * pad,
795 GstFormat src_format, gint64 src_start, gint64 src_stop,
796 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
800 GST_INFO ("starting conversion of start");
801 /* bring the format to time on srcpad. */
802 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
803 src_format, src_start, &dst_format, dst_start))) {
806 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
808 GST_INFO ("starting conversion of stop");
809 /* bring the format to time on srcpad. */
810 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
811 src_format, src_stop, &dst_format, dst_stop))) {
812 /* could not convert seek format to time offset */
815 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
820 /* convert a pair of values on the sinkpad */
822 gst_dvdemux_convert_sink_pair (GstDVDemux * dvdemux,
823 GstFormat src_format, gint64 src_start, gint64 src_stop,
824 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
828 GST_INFO ("starting conversion of start");
829 /* bring the format to time on srcpad. */
830 if (!(res = gst_dvdemux_sink_convert (dvdemux,
831 src_format, src_start, &dst_format, dst_start))) {
834 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
836 GST_INFO ("starting conversion of stop");
837 /* bring the format to time on srcpad. */
838 if (!(res = gst_dvdemux_sink_convert (dvdemux,
839 src_format, src_stop, &dst_format, dst_stop))) {
840 /* could not convert seek format to time offset */
843 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
848 /* convert a pair of values on the srcpad to a pair of
849 * values on the sinkpad
852 gst_dvdemux_convert_src_to_sink (GstDVDemux * dvdemux, GstPad * pad,
853 GstFormat src_format, gint64 src_start, gint64 src_stop,
854 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
859 conv = GST_FORMAT_TIME;
860 /* convert to TIME intermediate format */
861 if (!(res = gst_dvdemux_convert_src_pair (dvdemux, pad,
862 src_format, src_start, src_stop, conv, dst_start, dst_stop))) {
863 /* could not convert format to time offset */
866 /* convert to dst format on sinkpad */
867 if (!(res = gst_dvdemux_convert_sink_pair (dvdemux,
868 conv, *dst_start, *dst_stop, dst_format, dst_start, dst_stop))) {
869 /* could not convert format to time offset */
878 gst_dvdemux_convert_segment (GstDVDemux * dvdemux, GstSegment * src,
881 dest->rate = src->rate;
882 dest->abs_rate = src->abs_rate;
883 dest->flags = src->flags;
889 /* handle seek in push base mode.
891 * Convert the time seek to a bytes seek and send it
893 * Does not take ownership of the event.
896 gst_dvdemux_handle_push_seek (GstDVDemux * dvdemux, GstPad * pad,
899 gboolean res = FALSE;
903 GstSeekType cur_type, stop_type;
905 gint64 start_position, end_position;
908 gst_event_parse_seek (event, &rate, &format, &flags,
909 &cur_type, &cur, &stop_type, &stop);
911 /* First try if upstream can handle time based seeks */
912 if (format == GST_FORMAT_TIME)
913 res = gst_pad_push_event (dvdemux->sinkpad, gst_event_ref (event));
916 /* we convert the start/stop on the srcpad to the byte format
917 * on the sinkpad and forward the event */
918 res = gst_dvdemux_convert_src_to_sink (dvdemux, pad,
919 format, cur, stop, GST_FORMAT_BYTES, &start_position, &end_position);
923 /* now this is the updated seek event on bytes */
924 newevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
925 cur_type, start_position, stop_type, end_position);
927 res = gst_pad_push_event (dvdemux->sinkpad, newevent);
933 /* position ourselves to the configured segment, used in pull mode.
934 * The input segment is in TIME format. We convert the time values
935 * to bytes values into our byte_segment which we use to pull data from
939 gst_dvdemux_do_seek (GstDVDemux * demux, GstSegment * segment)
944 /* position to value configured is last_stop, this will round down
945 * to the byte position where the frame containing the given
946 * timestamp can be found. */
947 format = GST_FORMAT_BYTES;
948 res = gst_dvdemux_sink_convert (demux,
949 segment->format, segment->last_stop,
950 &format, &demux->byte_segment.last_stop);
954 /* update byte segment start */
955 gst_dvdemux_sink_convert (demux,
956 segment->format, segment->start, &format, &demux->byte_segment.start);
958 /* update byte segment stop */
959 gst_dvdemux_sink_convert (demux,
960 segment->format, segment->stop, &format, &demux->byte_segment.stop);
962 /* update byte segment time */
963 gst_dvdemux_sink_convert (demux,
964 segment->format, segment->time, &format, &demux->byte_segment.time);
966 /* calculate current frame number */
967 format = GST_FORMAT_DEFAULT;
968 gst_dvdemux_src_convert (demux, demux->videosrcpad,
969 segment->format, segment->start, &format, &demux->video_offset);
971 /* calculate current audio number */
972 format = GST_FORMAT_DEFAULT;
973 gst_dvdemux_src_convert (demux, demux->audiosrcpad,
974 segment->format, segment->start, &format, &demux->audio_offset);
976 /* every DV frame corresponts with one video frame */
977 demux->frame_offset = demux->video_offset;
983 /* handle seek in pull base mode.
985 * Does not take ownership of the event.
988 gst_dvdemux_handle_pull_seek (GstDVDemux * demux, GstPad * pad,
995 GstSeekType cur_type, stop_type;
999 GstSegment seeksegment;
1001 GST_DEBUG_OBJECT (demux, "doing seek");
1003 /* first bring the event format to TIME, our native format
1004 * to perform the seek on */
1008 gst_event_parse_seek (event, &rate, &format, &flags,
1009 &cur_type, &cur, &stop_type, &stop);
1011 /* can't seek backwards yet */
1015 /* convert input format to TIME */
1016 conv = GST_FORMAT_TIME;
1017 if (!(gst_dvdemux_convert_src_pair (demux, pad,
1018 format, cur, stop, conv, &cur, &stop)))
1021 format = GST_FORMAT_TIME;
1026 flush = flags & GST_SEEK_FLAG_FLUSH;
1028 /* send flush start */
1030 gst_dvdemux_push_event (demux, gst_event_new_flush_start ());
1032 gst_pad_pause_task (demux->sinkpad);
1034 /* grab streaming lock, this should eventually be possible, either
1035 * because the task is paused or our streaming thread stopped
1036 * because our peer is flushing. */
1037 GST_PAD_STREAM_LOCK (demux->sinkpad);
1039 /* make copy into temp structure, we can only update the main one
1040 * when the subclass actually could to the seek. */
1041 memcpy (&seeksegment, &demux->time_segment, sizeof (GstSegment));
1043 /* now configure the seek segment */
1045 gst_segment_set_seek (&seeksegment, rate, format, flags,
1046 cur_type, cur, stop_type, stop, &update);
1049 GST_DEBUG_OBJECT (demux, "segment configured from %" G_GINT64_FORMAT
1050 " to %" G_GINT64_FORMAT ", position %" G_GINT64_FORMAT,
1051 seeksegment.start, seeksegment.stop, seeksegment.last_stop);
1053 /* do the seek, segment.last_stop contains new position. */
1054 res = gst_dvdemux_do_seek (demux, &seeksegment);
1056 /* and prepare to continue streaming */
1058 /* send flush stop, peer will accept data and events again. We
1059 * are not yet providing data as we still have the STREAM_LOCK. */
1060 gst_dvdemux_push_event (demux, gst_event_new_flush_stop ());
1061 } else if (res && demux->running) {
1062 /* we are running the current segment and doing a non-flushing seek,
1063 * close the segment first based on the last_stop. */
1064 GST_DEBUG_OBJECT (demux, "closing running segment %" G_GINT64_FORMAT
1065 " to %" G_GINT64_FORMAT, demux->time_segment.start,
1066 demux->time_segment.last_stop);
1068 gst_dvdemux_push_event (demux,
1069 gst_event_new_new_segment (TRUE,
1070 demux->time_segment.rate, demux->time_segment.format,
1071 demux->time_segment.start, demux->time_segment.last_stop,
1072 demux->time_segment.time));
1075 /* if successfull seek, we update our real segment and push
1076 * out the new segment. */
1078 memcpy (&demux->time_segment, &seeksegment, sizeof (GstSegment));
1080 if (demux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1081 gst_element_post_message (GST_ELEMENT_CAST (demux),
1082 gst_message_new_segment_start (GST_OBJECT_CAST (demux),
1083 demux->time_segment.format, demux->time_segment.last_stop));
1085 if ((stop = demux->time_segment.stop) == -1)
1086 stop = demux->time_segment.duration;
1088 GST_INFO_OBJECT (demux,
1089 "Saving newsegment event to be sent in streaming thread");
1091 if (demux->pending_segment)
1092 gst_event_unref (demux->pending_segment);
1094 demux->pending_segment = gst_event_new_new_segment (FALSE,
1095 demux->time_segment.rate, demux->time_segment.format,
1096 demux->time_segment.last_stop, stop, demux->time_segment.time);
1098 demux->need_segment = FALSE;
1101 demux->running = TRUE;
1102 /* and restart the task in case it got paused explicitely or by
1103 * the FLUSH_START event we pushed out. */
1104 gst_pad_start_task (demux->sinkpad, (GstTaskFunction) gst_dvdemux_loop,
1107 /* and release the lock again so we can continue streaming */
1108 GST_PAD_STREAM_UNLOCK (demux->sinkpad);
1115 GST_DEBUG_OBJECT (demux, "negative playback rate %lf not supported.", rate);
1120 GST_DEBUG_OBJECT (demux, "cannot convert to TIME format, seek aborted.");
1126 gst_dvdemux_send_event (GstElement * element, GstEvent * event)
1128 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1129 gboolean res = FALSE;
1131 switch (GST_EVENT_TYPE (event)) {
1132 case GST_EVENT_SEEK:
1134 /* checking header and configuring the seek must be atomic */
1135 GST_OBJECT_LOCK (dvdemux);
1136 if (g_atomic_int_get (&dvdemux->found_header) == 0) {
1139 event_p = &dvdemux->seek_event;
1141 /* We don't have pads yet. Keep the event. */
1142 GST_INFO_OBJECT (dvdemux, "Keeping the seek event for later");
1144 gst_event_replace (event_p, event);
1145 GST_OBJECT_UNLOCK (dvdemux);
1149 GST_OBJECT_UNLOCK (dvdemux);
1151 if (dvdemux->seek_handler) {
1152 res = dvdemux->seek_handler (dvdemux, dvdemux->videosrcpad, event);
1153 gst_event_unref (event);
1159 res = GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
1166 /* handle an event on the source pad, it's most likely a seek */
1168 gst_dvdemux_handle_src_event (GstPad * pad, GstEvent * event)
1170 gboolean res = TRUE;
1171 GstDVDemux *dvdemux;
1173 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1175 switch (GST_EVENT_TYPE (event)) {
1176 case GST_EVENT_SEEK:
1177 /* seek handler is installed based on scheduling mode */
1178 if (dvdemux->seek_handler)
1179 res = dvdemux->seek_handler (dvdemux, pad, event);
1184 /* we can't really (yet) do QoS */
1187 case GST_EVENT_NAVIGATION:
1188 /* no navigation either... */
1192 res = gst_pad_push_event (dvdemux->sinkpad, event);
1197 gst_event_unref (event);
1199 gst_object_unref (dvdemux);
1204 /* does not take ownership of buffer */
1205 static GstFlowReturn
1206 gst_dvdemux_demux_audio (GstDVDemux * dvdemux, GstBuffer * buffer,
1213 data = GST_BUFFER_DATA (buffer);
1215 dv_decode_full_audio (dvdemux->decoder, data, dvdemux->audio_buffers);
1217 if (G_LIKELY ((num_samples = dv_get_num_samples (dvdemux->decoder)) > 0)) {
1221 gint frequency, channels;
1223 if (G_UNLIKELY (dvdemux->audiosrcpad == NULL))
1224 dvdemux->audiosrcpad = gst_dvdemux_add_pad (dvdemux, &audio_src_temp);
1226 /* get initial format or check if format changed */
1227 frequency = dv_get_frequency (dvdemux->decoder);
1228 channels = dv_get_num_channels (dvdemux->decoder);
1230 if (G_UNLIKELY ((frequency != dvdemux->frequency)
1231 || (channels != dvdemux->channels))) {
1234 dvdemux->frequency = frequency;
1235 dvdemux->channels = channels;
1237 /* and set new caps */
1238 caps = gst_caps_new_simple ("audio/x-raw-int",
1239 "rate", G_TYPE_INT, frequency,
1240 "depth", G_TYPE_INT, 16,
1241 "width", G_TYPE_INT, 16,
1242 "signed", G_TYPE_BOOLEAN, TRUE,
1243 "channels", G_TYPE_INT, channels,
1244 "endianness", G_TYPE_INT, G_BYTE_ORDER, NULL);
1245 gst_pad_set_caps (dvdemux->audiosrcpad, caps);
1246 gst_caps_unref (caps);
1249 outbuf = gst_buffer_new_and_alloc (num_samples *
1250 sizeof (gint16) * dvdemux->channels);
1252 a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
1254 for (i = 0; i < num_samples; i++) {
1255 for (j = 0; j < dvdemux->channels; j++) {
1256 *(a_ptr++) = dvdemux->audio_buffers[j][i];
1260 GST_DEBUG ("pushing audio %" GST_TIME_FORMAT,
1261 GST_TIME_ARGS (dvdemux->time_segment.last_stop));
1263 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.last_stop;
1264 GST_BUFFER_DURATION (outbuf) = duration;
1265 GST_BUFFER_OFFSET (outbuf) = dvdemux->audio_offset;
1266 dvdemux->audio_offset += num_samples;
1267 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->audio_offset;
1269 if (dvdemux->new_media)
1270 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1271 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dvdemux->audiosrcpad));
1273 ret = gst_pad_push (dvdemux->audiosrcpad, outbuf);
1282 /* takes ownership of buffer */
1283 static GstFlowReturn
1284 gst_dvdemux_demux_video (GstDVDemux * dvdemux, GstBuffer * buffer,
1290 GstFlowReturn ret = GST_FLOW_OK;
1292 if (G_UNLIKELY (dvdemux->videosrcpad == NULL))
1293 dvdemux->videosrcpad = gst_dvdemux_add_pad (dvdemux, &video_src_temp);
1296 /* framerate is already up-to-date */
1297 height = dvdemux->decoder->height;
1298 wide = dv_format_wide (dvdemux->decoder);
1300 /* see if anything changed */
1301 if (G_UNLIKELY ((dvdemux->height != height) || dvdemux->wide != wide)) {
1305 dvdemux->height = height;
1306 dvdemux->wide = wide;
1308 if (dvdemux->decoder->system == e_dv_system_625_50) {
1310 par_x = PAL_WIDE_PAR_X;
1311 par_y = PAL_WIDE_PAR_Y;
1313 par_x = PAL_NORMAL_PAR_X;
1314 par_y = PAL_NORMAL_PAR_Y;
1318 par_x = NTSC_WIDE_PAR_X;
1319 par_y = NTSC_WIDE_PAR_Y;
1321 par_x = NTSC_NORMAL_PAR_X;
1322 par_y = NTSC_NORMAL_PAR_Y;
1326 caps = gst_caps_new_simple ("video/x-dv",
1327 "systemstream", G_TYPE_BOOLEAN, FALSE,
1328 "width", G_TYPE_INT, 720,
1329 "height", G_TYPE_INT, height,
1330 "framerate", GST_TYPE_FRACTION, dvdemux->framerate_numerator,
1331 dvdemux->framerate_denominator,
1332 "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
1333 gst_pad_set_caps (dvdemux->videosrcpad, caps);
1334 gst_caps_unref (caps);
1337 /* takes ownership of buffer here, we just need to modify
1339 outbuf = gst_buffer_make_metadata_writable (buffer);
1341 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.last_stop;
1342 GST_BUFFER_OFFSET (outbuf) = dvdemux->video_offset;
1343 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->video_offset + 1;
1344 GST_BUFFER_DURATION (outbuf) = duration;
1346 if (dvdemux->new_media)
1347 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1348 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dvdemux->videosrcpad));
1350 GST_DEBUG ("pushing video %" GST_TIME_FORMAT,
1351 GST_TIME_ARGS (dvdemux->time_segment.last_stop));
1353 ret = gst_pad_push (dvdemux->videosrcpad, outbuf);
1355 dvdemux->video_offset++;
1361 get_ssyb_offset (int dif, int ssyb)
1365 offset = dif * 12000; /* to dif */
1366 offset += 80 * (1 + (ssyb / 6)); /* to subcode pack */
1367 offset += 3; /* past header */
1368 offset += 8 * (ssyb % 6); /* to ssyb */
1374 gst_dvdemux_get_timecode (GstDVDemux * dvdemux, GstBuffer * buffer,
1375 GstSMPTETimeCode * timecode)
1377 guint8 *data = GST_BUFFER_DATA (buffer);
1380 int n_difs = dvdemux->decoder->num_dif_seqs;
1382 for (dif = 0; dif < n_difs; dif++) {
1383 offset = get_ssyb_offset (dif, 3);
1384 if (data[offset + 3] == 0x13) {
1385 timecode->frames = ((data[offset + 4] >> 4) & 0x3) * 10 +
1386 (data[offset + 4] & 0xf);
1387 timecode->seconds = ((data[offset + 5] >> 4) & 0x3) * 10 +
1388 (data[offset + 5] & 0xf);
1389 timecode->minutes = ((data[offset + 6] >> 4) & 0x3) * 10 +
1390 (data[offset + 6] & 0xf);
1391 timecode->hours = ((data[offset + 7] >> 4) & 0x3) * 10 +
1392 (data[offset + 7] & 0xf);
1393 GST_DEBUG ("got timecode %" GST_SMPTE_TIME_CODE_FORMAT,
1394 GST_SMPTE_TIME_CODE_ARGS (timecode));
1403 gst_dvdemux_is_new_media (GstDVDemux * dvdemux, GstBuffer * buffer)
1405 guint8 *data = GST_BUFFER_DATA (buffer);
1410 n_difs = dvdemux->decoder->num_dif_seqs;
1412 for (dif = 0; dif < n_difs; dif++) {
1414 aaux_offset = (dif * 12000) + (6 + 16 * 1) * 80 + 3;
1416 aaux_offset = (dif * 12000) + (6 + 16 * 4) * 80 + 3;
1418 if (data[aaux_offset + 0] == 0x51) {
1419 if ((data[aaux_offset + 2] & 0x80) == 0)
1427 /* takes ownership of buffer */
1428 static GstFlowReturn
1429 gst_dvdemux_demux_frame (GstDVDemux * dvdemux, GstBuffer * buffer)
1431 GstClockTime next_ts;
1432 GstFlowReturn aret, vret, ret;
1435 GstSMPTETimeCode timecode;
1438 if (G_UNLIKELY (dvdemux->need_segment)) {
1442 /* convert to time and store as start/end_timestamp */
1443 format = GST_FORMAT_TIME;
1444 if (!(gst_dvdemux_convert_sink_pair (dvdemux,
1445 GST_FORMAT_BYTES, dvdemux->byte_segment.start,
1446 dvdemux->byte_segment.stop, format,
1447 &dvdemux->time_segment.start, &dvdemux->time_segment.stop)))
1450 dvdemux->time_segment.rate = dvdemux->byte_segment.rate;
1451 dvdemux->time_segment.abs_rate = dvdemux->byte_segment.abs_rate;
1452 dvdemux->time_segment.last_stop = dvdemux->time_segment.start;
1454 /* calculate current frame number */
1455 format = GST_FORMAT_DEFAULT;
1456 if (!(gst_dvdemux_src_convert (dvdemux, dvdemux->videosrcpad,
1457 GST_FORMAT_TIME, dvdemux->time_segment.start,
1458 &format, &dvdemux->frame_offset)))
1461 GST_DEBUG_OBJECT (dvdemux, "sending segment start: %" GST_TIME_FORMAT
1462 ", stop: %" GST_TIME_FORMAT ", time: %" GST_TIME_FORMAT,
1463 GST_TIME_ARGS (dvdemux->time_segment.start),
1464 GST_TIME_ARGS (dvdemux->time_segment.stop),
1465 GST_TIME_ARGS (dvdemux->time_segment.start));
1467 event = gst_event_new_new_segment (FALSE, dvdemux->byte_segment.rate,
1468 GST_FORMAT_TIME, dvdemux->time_segment.start,
1469 dvdemux->time_segment.stop, dvdemux->time_segment.start);
1470 gst_dvdemux_push_event (dvdemux, event);
1472 dvdemux->need_segment = FALSE;
1475 gst_dvdemux_get_timecode (dvdemux, buffer, &timecode);
1476 gst_smpte_time_code_get_frame_number (
1477 (dvdemux->decoder->system == e_dv_system_625_50) ?
1478 GST_SMPTE_TIME_CODE_SYSTEM_25 : GST_SMPTE_TIME_CODE_SYSTEM_30,
1479 &frame_number, &timecode);
1481 next_ts = gst_util_uint64_scale_int (
1482 (dvdemux->frame_offset + 1) * GST_SECOND,
1483 dvdemux->framerate_denominator, dvdemux->framerate_numerator);
1484 duration = next_ts - dvdemux->time_segment.last_stop;
1486 data = GST_BUFFER_DATA (buffer);
1488 dv_parse_packs (dvdemux->decoder, data);
1489 dvdemux->new_media = FALSE;
1490 if (gst_dvdemux_is_new_media (dvdemux, buffer) &&
1491 dvdemux->frames_since_new_media > 2) {
1492 dvdemux->new_media = TRUE;
1493 dvdemux->frames_since_new_media = 0;
1495 dvdemux->frames_since_new_media++;
1497 /* does not take ownership of buffer */
1498 aret = ret = gst_dvdemux_demux_audio (dvdemux, buffer, duration);
1499 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)) {
1500 gst_buffer_unref (buffer);
1504 /* takes ownership of buffer */
1505 vret = ret = gst_dvdemux_demux_video (dvdemux, buffer, duration);
1506 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED))
1509 /* if both are not linked, we stop */
1510 if (G_UNLIKELY (aret == GST_FLOW_NOT_LINKED && vret == GST_FLOW_NOT_LINKED)) {
1511 ret = GST_FLOW_NOT_LINKED;
1515 gst_segment_set_last_stop (&dvdemux->time_segment, GST_FORMAT_TIME, next_ts);
1516 dvdemux->frame_offset++;
1518 /* check for the end of the segment */
1519 if (dvdemux->time_segment.stop != -1 && next_ts > dvdemux->time_segment.stop)
1520 ret = GST_FLOW_UNEXPECTED;
1530 GST_DEBUG ("error generating new_segment event");
1531 gst_buffer_unref (buffer);
1532 return GST_FLOW_ERROR;
1536 /* flush any remaining data in the adapter, used in chain based scheduling mode */
1537 static GstFlowReturn
1538 gst_dvdemux_flush (GstDVDemux * dvdemux)
1540 GstFlowReturn ret = GST_FLOW_OK;
1542 while (gst_adapter_available (dvdemux->adapter) >= dvdemux->frame_len) {
1546 /* get the accumulated bytes */
1547 data = gst_adapter_peek (dvdemux->adapter, dvdemux->frame_len);
1549 /* parse header to know the length and other params */
1550 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0))
1551 goto parse_header_error;
1553 /* after parsing the header we know the length of the data */
1554 length = dvdemux->frame_len = dvdemux->decoder->frame_size;
1555 if (dvdemux->decoder->system == e_dv_system_625_50) {
1556 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1557 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1559 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1560 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1562 g_atomic_int_set (&dvdemux->found_header, 1);
1564 /* let demux_video set the height, it needs to detect when things change so
1565 * it can reset caps */
1567 /* if we still have enough for a frame, start decoding */
1568 if (G_LIKELY (gst_adapter_available (dvdemux->adapter) >= length)) {
1571 data = gst_adapter_take (dvdemux->adapter, length);
1573 /* create buffer for the remainder of the code */
1574 buffer = gst_buffer_new ();
1575 GST_BUFFER_DATA (buffer) = (guint8 *) data;
1576 GST_BUFFER_SIZE (buffer) = length;
1577 GST_BUFFER_MALLOCDATA (buffer) = (guint8 *) data;
1579 /* and decode the buffer, takes ownership */
1580 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1581 if (G_UNLIKELY (ret != GST_FLOW_OK))
1591 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1592 (NULL), ("Error parsing DV header"));
1593 return GST_FLOW_ERROR;
1597 /* streaming operation:
1599 * accumulate data until we have a frame, then decode.
1601 static GstFlowReturn
1602 gst_dvdemux_chain (GstPad * pad, GstBuffer * buffer)
1604 GstDVDemux *dvdemux;
1606 GstClockTime timestamp;
1608 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1610 /* a discontinuity in the stream, we need to get rid of
1611 * accumulated data in the adapter and assume a new frame
1612 * starts after the discontinuity */
1613 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)))
1614 gst_adapter_clear (dvdemux->adapter);
1616 /* a timestamp always should be respected */
1617 timestamp = GST_BUFFER_TIMESTAMP (buffer);
1618 if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
1619 gst_segment_set_last_stop (&dvdemux->time_segment, GST_FORMAT_TIME,
1621 /* FIXME, adjust frame_offset and other counters */
1624 gst_adapter_push (dvdemux->adapter, buffer);
1626 /* Apparently dv_parse_header can read from the body of the frame
1627 * too, so it needs more than header_size bytes. Wacky!
1629 if (G_UNLIKELY (dvdemux->frame_len == -1)) {
1630 /* if we don't know the length of a frame, we assume it is
1631 * the NTSC_BUFFER length, as this is enough to figure out
1632 * if this is PAL or NTSC */
1633 dvdemux->frame_len = NTSC_BUFFER;
1636 /* and try to flush pending frames */
1637 ret = gst_dvdemux_flush (dvdemux);
1639 gst_object_unref (dvdemux);
1644 /* pull based operation.
1646 * Read header first to figure out the frame size. Then read
1647 * and decode full frames.
1650 gst_dvdemux_loop (GstPad * pad)
1653 GstDVDemux *dvdemux;
1654 GstBuffer *buffer = NULL;
1657 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1659 if (G_UNLIKELY (g_atomic_int_get (&dvdemux->found_header) == 0)) {
1660 GST_DEBUG_OBJECT (dvdemux, "pulling first buffer");
1661 /* pull in NTSC sized buffer to figure out the frame
1663 ret = gst_pad_pull_range (dvdemux->sinkpad,
1664 dvdemux->byte_segment.last_stop, NTSC_BUFFER, &buffer);
1665 if (G_UNLIKELY (ret != GST_FLOW_OK))
1668 /* check buffer size, don't want to read small buffers */
1669 if (G_UNLIKELY (GST_BUFFER_SIZE (buffer) < NTSC_BUFFER))
1672 data = GST_BUFFER_DATA (buffer);
1674 /* parse header to know the length and other params */
1675 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0))
1676 goto parse_header_error;
1678 /* after parsing the header we know the length of the data */
1679 dvdemux->frame_len = dvdemux->decoder->frame_size;
1680 if (dvdemux->decoder->system == e_dv_system_625_50) {
1681 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1682 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1684 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1685 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1687 dvdemux->need_segment = TRUE;
1689 /* see if we need to read a larger part */
1690 if (dvdemux->frame_len != NTSC_BUFFER) {
1691 gst_buffer_unref (buffer);
1698 /* setting header and prrforming the seek must be atomic */
1699 GST_OBJECT_LOCK (dvdemux);
1700 /* got header now */
1701 g_atomic_int_set (&dvdemux->found_header, 1);
1703 /* now perform pending seek if any. */
1704 event = dvdemux->seek_event;
1706 gst_event_ref (event);
1707 GST_OBJECT_UNLOCK (dvdemux);
1710 if (!gst_dvdemux_handle_pull_seek (dvdemux, dvdemux->videosrcpad,
1712 GST_ELEMENT_WARNING (dvdemux, STREAM, DECODE, (NULL),
1713 ("Error perfoming initial seek"));
1715 gst_event_unref (event);
1717 /* and we need to pull a new buffer in all cases. */
1719 gst_buffer_unref (buffer);
1727 if (G_UNLIKELY (dvdemux->pending_segment)) {
1729 /* now send the newsegment */
1730 GST_DEBUG_OBJECT (dvdemux, "Sending newsegment from");
1732 gst_dvdemux_push_event (dvdemux, dvdemux->pending_segment);
1733 dvdemux->pending_segment = NULL;
1736 if (G_LIKELY (buffer == NULL)) {
1737 GST_DEBUG_OBJECT (dvdemux, "pulling buffer at offset %" G_GINT64_FORMAT,
1738 dvdemux->byte_segment.last_stop);
1740 ret = gst_pad_pull_range (dvdemux->sinkpad,
1741 dvdemux->byte_segment.last_stop, dvdemux->frame_len, &buffer);
1742 if (ret != GST_FLOW_OK)
1745 /* check buffer size, don't want to read small buffers */
1746 if (GST_BUFFER_SIZE (buffer) < dvdemux->frame_len)
1749 /* and decode the buffer */
1750 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1751 if (G_UNLIKELY (ret != GST_FLOW_OK))
1754 /* and position ourselves for the next buffer */
1755 dvdemux->byte_segment.last_stop += dvdemux->frame_len;
1758 gst_object_unref (dvdemux);
1765 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1766 (NULL), ("Error parsing DV header"));
1767 gst_buffer_unref (buffer);
1768 dvdemux->running = FALSE;
1769 gst_pad_pause_task (dvdemux->sinkpad);
1770 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1775 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1776 (NULL), ("Error reading buffer"));
1777 gst_buffer_unref (buffer);
1778 dvdemux->running = FALSE;
1779 gst_pad_pause_task (dvdemux->sinkpad);
1780 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1785 GST_INFO_OBJECT (dvdemux, "pausing task, %s", gst_flow_get_name (ret));
1786 dvdemux->running = FALSE;
1787 gst_pad_pause_task (dvdemux->sinkpad);
1788 if (ret == GST_FLOW_UNEXPECTED) {
1789 GST_LOG_OBJECT (dvdemux, "got eos");
1790 /* perform EOS logic */
1791 if (dvdemux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1792 gst_element_post_message (GST_ELEMENT (dvdemux),
1793 gst_message_new_segment_done (GST_OBJECT_CAST (dvdemux),
1794 dvdemux->time_segment.format, dvdemux->time_segment.last_stop));
1796 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1798 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
1799 /* for fatal errors or not-linked we post an error message */
1800 GST_ELEMENT_ERROR (dvdemux, STREAM, FAILED,
1801 (NULL), ("streaming stopped, reason %s", gst_flow_get_name (ret)));
1802 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1809 gst_dvdemux_sink_activate_push (GstPad * sinkpad, gboolean active)
1811 GstDVDemux *demux = GST_DVDEMUX (gst_pad_get_parent (sinkpad));
1814 demux->seek_handler = gst_dvdemux_handle_push_seek;
1816 demux->seek_handler = NULL;
1818 gst_object_unref (demux);
1824 gst_dvdemux_sink_activate_pull (GstPad * sinkpad, gboolean active)
1826 GstDVDemux *demux = GST_DVDEMUX (gst_pad_get_parent (sinkpad));
1829 demux->running = TRUE;
1830 demux->seek_handler = gst_dvdemux_handle_pull_seek;
1831 gst_pad_start_task (sinkpad, (GstTaskFunction) gst_dvdemux_loop, sinkpad);
1833 demux->seek_handler = NULL;
1834 gst_pad_stop_task (sinkpad);
1835 demux->running = FALSE;
1838 gst_object_unref (demux);
1843 /* decide on push or pull based scheduling */
1845 gst_dvdemux_sink_activate (GstPad * sinkpad)
1849 if (gst_pad_check_pull_range (sinkpad))
1850 ret = gst_pad_activate_pull (sinkpad, TRUE);
1852 ret = gst_pad_activate_push (sinkpad, TRUE);
1857 static GstStateChangeReturn
1858 gst_dvdemux_change_state (GstElement * element, GstStateChange transition)
1860 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1861 GstStateChangeReturn ret;
1863 switch (transition) {
1864 case GST_STATE_CHANGE_NULL_TO_READY:
1866 case GST_STATE_CHANGE_READY_TO_PAUSED:
1867 dvdemux->decoder = dv_decoder_new (0, FALSE, FALSE);
1868 dv_set_error_log (dvdemux->decoder, NULL);
1869 gst_dvdemux_reset (dvdemux);
1871 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1877 ret = parent_class->change_state (element, transition);
1879 switch (transition) {
1880 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1882 case GST_STATE_CHANGE_PAUSED_TO_READY:
1883 gst_adapter_clear (dvdemux->adapter);
1884 dv_decoder_free (dvdemux->decoder);
1885 dvdemux->decoder = NULL;
1887 gst_dvdemux_remove_pads (dvdemux);
1889 case GST_STATE_CHANGE_READY_TO_NULL:
1893 event_p = &dvdemux->seek_event;
1894 gst_event_replace (event_p, NULL);
1895 if (dvdemux->pending_segment)
1896 gst_event_unref (dvdemux->pending_segment);
1897 dvdemux->pending_segment = NULL;