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:
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 if ((peer = gst_pad_get_peer (dvdemux->sinkpad))) {
586 /* ask peer for total length */
587 if (!(res = gst_pad_query (peer, query))) {
588 gst_object_unref (peer);
592 /* get peer total length */
593 gst_query_parse_duration (query, NULL, &end);
595 gst_object_unref (peer);
597 /* convert end to requested format */
600 if (!(res = gst_dvdemux_sink_convert (dvdemux,
601 GST_FORMAT_BYTES, end, &format2, &end))) {
608 gst_query_set_duration (query, format, end);
611 case GST_QUERY_CONVERT:
613 GstFormat src_fmt, dest_fmt;
614 gint64 src_val, dest_val;
616 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
618 gst_dvdemux_src_convert (dvdemux, pad, src_fmt, src_val,
619 &dest_fmt, &dest_val)))
621 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
625 res = gst_pad_query_default (pad, query);
628 gst_object_unref (dvdemux);
635 gst_object_unref (dvdemux);
636 GST_DEBUG ("error source query");
641 static const GstQueryType *
642 gst_dvdemux_get_sink_query_types (GstPad * pad)
644 static const GstQueryType sink_query_types[] = {
649 return sink_query_types;
653 gst_dvdemux_sink_query (GstPad * pad, GstQuery * query)
658 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
660 switch (GST_QUERY_TYPE (query)) {
661 case GST_QUERY_CONVERT:
663 GstFormat src_fmt, dest_fmt;
664 gint64 src_val, dest_val;
666 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
668 gst_dvdemux_sink_convert (dvdemux, src_fmt, src_val, &dest_fmt,
671 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
675 res = gst_pad_query_default (pad, query);
678 gst_object_unref (dvdemux);
685 gst_object_unref (dvdemux);
686 GST_DEBUG ("error handling sink query");
691 /* takes ownership of the event */
693 gst_dvdemux_push_event (GstDVDemux * dvdemux, GstEvent * event)
695 gboolean res = FALSE;
697 if (dvdemux->videosrcpad) {
698 gst_event_ref (event);
699 res |= gst_pad_push_event (dvdemux->videosrcpad, event);
702 if (dvdemux->audiosrcpad)
703 res |= gst_pad_push_event (dvdemux->audiosrcpad, event);
705 gst_event_unref (event);
711 gst_dvdemux_handle_sink_event (GstPad * pad, GstEvent * event)
713 GstDVDemux *dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
716 switch (GST_EVENT_TYPE (event)) {
717 case GST_EVENT_FLUSH_START:
718 /* we are not blocking on anything exect the push() calls
719 * to the peer which will be unblocked by forwarding the
721 res = gst_dvdemux_push_event (dvdemux, event);
723 case GST_EVENT_FLUSH_STOP:
724 gst_adapter_clear (dvdemux->adapter);
725 GST_DEBUG ("cleared adapter");
726 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
727 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
728 res = gst_dvdemux_push_event (dvdemux, event);
730 case GST_EVENT_NEWSEGMENT:
735 gint64 start, stop, time;
737 /* parse byte start and stop positions */
738 gst_event_parse_new_segment (event, &update, &rate, &format,
739 &start, &stop, &time);
742 case GST_FORMAT_BYTES:
743 gst_segment_set_newsegment (&dvdemux->byte_segment, update,
744 rate, format, start, stop, time);
746 /* the update can always be sent */
750 update = gst_event_new_new_segment (TRUE,
751 dvdemux->time_segment.rate, dvdemux->time_segment.format,
752 dvdemux->time_segment.start, dvdemux->time_segment.last_stop,
753 dvdemux->time_segment.time);
755 gst_dvdemux_push_event (dvdemux, update);
757 /* and queue a SEGMENT before sending the next set of buffers, we
758 * cannot convert to time yet as we might not know the size of the
760 dvdemux->need_segment = TRUE;
762 gst_event_unref (event);
764 case GST_FORMAT_TIME:
765 gst_segment_set_newsegment (&dvdemux->time_segment, update,
766 rate, format, start, stop, time);
768 /* and we can just forward this time event */
769 res = gst_dvdemux_push_event (dvdemux, event);
772 gst_event_unref (event);
773 /* cannot accept this format */
780 /* flush any pending data, should be nothing left. */
781 gst_dvdemux_flush (dvdemux);
783 res = gst_dvdemux_push_event (dvdemux, event);
784 /* and clear the adapter */
785 gst_adapter_clear (dvdemux->adapter);
788 res = gst_dvdemux_push_event (dvdemux, event);
792 gst_object_unref (dvdemux);
797 /* convert a pair of values on the given srcpad */
799 gst_dvdemux_convert_src_pair (GstDVDemux * dvdemux, GstPad * pad,
800 GstFormat src_format, gint64 src_start, gint64 src_stop,
801 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
805 GST_INFO ("starting conversion of start");
806 /* bring the format to time on srcpad. */
807 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
808 src_format, src_start, &dst_format, dst_start))) {
811 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
813 GST_INFO ("starting conversion of stop");
814 /* bring the format to time on srcpad. */
815 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
816 src_format, src_stop, &dst_format, dst_stop))) {
817 /* could not convert seek format to time offset */
820 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
825 /* convert a pair of values on the sinkpad */
827 gst_dvdemux_convert_sink_pair (GstDVDemux * dvdemux,
828 GstFormat src_format, gint64 src_start, gint64 src_stop,
829 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
833 GST_INFO ("starting conversion of start");
834 /* bring the format to time on srcpad. */
835 if (!(res = gst_dvdemux_sink_convert (dvdemux,
836 src_format, src_start, &dst_format, dst_start))) {
839 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
841 GST_INFO ("starting conversion of stop");
842 /* bring the format to time on srcpad. */
843 if (!(res = gst_dvdemux_sink_convert (dvdemux,
844 src_format, src_stop, &dst_format, dst_stop))) {
845 /* could not convert seek format to time offset */
848 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
853 /* convert a pair of values on the srcpad to a pair of
854 * values on the sinkpad
857 gst_dvdemux_convert_src_to_sink (GstDVDemux * dvdemux, GstPad * pad,
858 GstFormat src_format, gint64 src_start, gint64 src_stop,
859 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
864 conv = GST_FORMAT_TIME;
865 /* convert to TIME intermediate format */
866 if (!(res = gst_dvdemux_convert_src_pair (dvdemux, pad,
867 src_format, src_start, src_stop, conv, dst_start, dst_stop))) {
868 /* could not convert format to time offset */
871 /* convert to dst format on sinkpad */
872 if (!(res = gst_dvdemux_convert_sink_pair (dvdemux,
873 conv, *dst_start, *dst_stop, dst_format, dst_start, dst_stop))) {
874 /* could not convert format to time offset */
883 gst_dvdemux_convert_segment (GstDVDemux * dvdemux, GstSegment * src,
886 dest->rate = src->rate;
887 dest->abs_rate = src->abs_rate;
888 dest->flags = src->flags;
894 /* handle seek in push base mode.
896 * Convert the time seek to a bytes seek and send it
898 * Does not take ownership of the event.
901 gst_dvdemux_handle_push_seek (GstDVDemux * dvdemux, GstPad * pad,
904 gboolean res = FALSE;
908 GstSeekType cur_type, stop_type;
910 gint64 start_position, end_position;
913 gst_event_parse_seek (event, &rate, &format, &flags,
914 &cur_type, &cur, &stop_type, &stop);
916 /* First try if upstream can handle time based seeks */
917 if (format == GST_FORMAT_TIME)
918 res = gst_pad_push_event (dvdemux->sinkpad, gst_event_ref (event));
921 /* we convert the start/stop on the srcpad to the byte format
922 * on the sinkpad and forward the event */
923 res = gst_dvdemux_convert_src_to_sink (dvdemux, pad,
924 format, cur, stop, GST_FORMAT_BYTES, &start_position, &end_position);
928 /* now this is the updated seek event on bytes */
929 newevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
930 cur_type, start_position, stop_type, end_position);
932 res = gst_pad_push_event (dvdemux->sinkpad, newevent);
938 /* position ourselves to the configured segment, used in pull mode.
939 * The input segment is in TIME format. We convert the time values
940 * to bytes values into our byte_segment which we use to pull data from
944 gst_dvdemux_do_seek (GstDVDemux * demux, GstSegment * segment)
949 /* position to value configured is last_stop, this will round down
950 * to the byte position where the frame containing the given
951 * timestamp can be found. */
952 format = GST_FORMAT_BYTES;
953 res = gst_dvdemux_sink_convert (demux,
954 segment->format, segment->last_stop,
955 &format, &demux->byte_segment.last_stop);
959 /* update byte segment start */
960 gst_dvdemux_sink_convert (demux,
961 segment->format, segment->start, &format, &demux->byte_segment.start);
963 /* update byte segment stop */
964 gst_dvdemux_sink_convert (demux,
965 segment->format, segment->stop, &format, &demux->byte_segment.stop);
967 /* update byte segment time */
968 gst_dvdemux_sink_convert (demux,
969 segment->format, segment->time, &format, &demux->byte_segment.time);
971 /* calculate current frame number */
972 format = GST_FORMAT_DEFAULT;
973 gst_dvdemux_src_convert (demux, demux->videosrcpad,
974 segment->format, segment->start, &format, &demux->video_offset);
976 /* calculate current audio number */
977 format = GST_FORMAT_DEFAULT;
978 gst_dvdemux_src_convert (demux, demux->audiosrcpad,
979 segment->format, segment->start, &format, &demux->audio_offset);
981 /* every DV frame corresponts with one video frame */
982 demux->frame_offset = demux->video_offset;
988 /* handle seek in pull base mode.
990 * Does not take ownership of the event.
993 gst_dvdemux_handle_pull_seek (GstDVDemux * demux, GstPad * pad,
1000 GstSeekType cur_type, stop_type;
1004 GstSegment seeksegment;
1006 GST_DEBUG_OBJECT (demux, "doing seek");
1008 /* first bring the event format to TIME, our native format
1009 * to perform the seek on */
1013 gst_event_parse_seek (event, &rate, &format, &flags,
1014 &cur_type, &cur, &stop_type, &stop);
1016 /* can't seek backwards yet */
1020 /* convert input format to TIME */
1021 conv = GST_FORMAT_TIME;
1022 if (!(gst_dvdemux_convert_src_pair (demux, pad,
1023 format, cur, stop, conv, &cur, &stop)))
1026 format = GST_FORMAT_TIME;
1031 flush = flags & GST_SEEK_FLAG_FLUSH;
1033 /* send flush start */
1035 gst_dvdemux_push_event (demux, gst_event_new_flush_start ());
1037 gst_pad_pause_task (demux->sinkpad);
1039 /* grab streaming lock, this should eventually be possible, either
1040 * because the task is paused or our streaming thread stopped
1041 * because our peer is flushing. */
1042 GST_PAD_STREAM_LOCK (demux->sinkpad);
1044 /* make copy into temp structure, we can only update the main one
1045 * when the subclass actually could to the seek. */
1046 memcpy (&seeksegment, &demux->time_segment, sizeof (GstSegment));
1048 /* now configure the seek segment */
1050 gst_segment_set_seek (&seeksegment, rate, format, flags,
1051 cur_type, cur, stop_type, stop, &update);
1054 GST_DEBUG_OBJECT (demux, "segment configured from %" G_GINT64_FORMAT
1055 " to %" G_GINT64_FORMAT ", position %" G_GINT64_FORMAT,
1056 seeksegment.start, seeksegment.stop, seeksegment.last_stop);
1058 /* do the seek, segment.last_stop contains new position. */
1059 res = gst_dvdemux_do_seek (demux, &seeksegment);
1061 /* and prepare to continue streaming */
1063 /* send flush stop, peer will accept data and events again. We
1064 * are not yet providing data as we still have the STREAM_LOCK. */
1065 gst_dvdemux_push_event (demux, gst_event_new_flush_stop ());
1066 } else if (res && demux->running) {
1067 /* we are running the current segment and doing a non-flushing seek,
1068 * close the segment first based on the last_stop. */
1069 GST_DEBUG_OBJECT (demux, "closing running segment %" G_GINT64_FORMAT
1070 " to %" G_GINT64_FORMAT, demux->time_segment.start,
1071 demux->time_segment.last_stop);
1073 gst_dvdemux_push_event (demux,
1074 gst_event_new_new_segment (TRUE,
1075 demux->time_segment.rate, demux->time_segment.format,
1076 demux->time_segment.start, demux->time_segment.last_stop,
1077 demux->time_segment.time));
1080 /* if successfull seek, we update our real segment and push
1081 * out the new segment. */
1083 memcpy (&demux->time_segment, &seeksegment, sizeof (GstSegment));
1085 if (demux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1086 gst_element_post_message (GST_ELEMENT_CAST (demux),
1087 gst_message_new_segment_start (GST_OBJECT_CAST (demux),
1088 demux->time_segment.format, demux->time_segment.last_stop));
1090 if ((stop = demux->time_segment.stop) == -1)
1091 stop = demux->time_segment.duration;
1093 GST_INFO_OBJECT (demux,
1094 "Saving newsegment event to be sent in streaming thread");
1096 if (demux->pending_segment)
1097 gst_event_unref (demux->pending_segment);
1099 demux->pending_segment = gst_event_new_new_segment (FALSE,
1100 demux->time_segment.rate, demux->time_segment.format,
1101 demux->time_segment.last_stop, stop, demux->time_segment.time);
1103 demux->need_segment = FALSE;
1106 demux->running = TRUE;
1107 /* and restart the task in case it got paused explicitely or by
1108 * the FLUSH_START event we pushed out. */
1109 gst_pad_start_task (demux->sinkpad, (GstTaskFunction) gst_dvdemux_loop,
1112 /* and release the lock again so we can continue streaming */
1113 GST_PAD_STREAM_UNLOCK (demux->sinkpad);
1120 GST_DEBUG_OBJECT (demux, "negative playback rate %lf not supported.", rate);
1125 GST_DEBUG_OBJECT (demux, "cannot convert to TIME format, seek aborted.");
1131 gst_dvdemux_send_event (GstElement * element, GstEvent * event)
1133 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1134 gboolean res = FALSE;
1136 switch (GST_EVENT_TYPE (event)) {
1137 case GST_EVENT_SEEK:
1139 /* checking header and configuring the seek must be atomic */
1140 GST_OBJECT_LOCK (dvdemux);
1141 if (g_atomic_int_get (&dvdemux->found_header) == 0) {
1144 event_p = &dvdemux->seek_event;
1146 /* We don't have pads yet. Keep the event. */
1147 GST_INFO_OBJECT (dvdemux, "Keeping the seek event for later");
1149 gst_event_replace (event_p, event);
1150 GST_OBJECT_UNLOCK (dvdemux);
1154 GST_OBJECT_UNLOCK (dvdemux);
1156 if (dvdemux->seek_handler) {
1157 res = dvdemux->seek_handler (dvdemux, dvdemux->videosrcpad, event);
1158 gst_event_unref (event);
1164 res = GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
1171 /* handle an event on the source pad, it's most likely a seek */
1173 gst_dvdemux_handle_src_event (GstPad * pad, GstEvent * event)
1175 gboolean res = TRUE;
1176 GstDVDemux *dvdemux;
1178 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1180 switch (GST_EVENT_TYPE (event)) {
1181 case GST_EVENT_SEEK:
1182 /* seek handler is installed based on scheduling mode */
1183 if (dvdemux->seek_handler)
1184 res = dvdemux->seek_handler (dvdemux, pad, event);
1189 /* we can't really (yet) do QoS */
1192 case GST_EVENT_NAVIGATION:
1193 /* no navigation either... */
1197 res = gst_pad_push_event (dvdemux->sinkpad, event);
1202 gst_event_unref (event);
1204 gst_object_unref (dvdemux);
1209 /* does not take ownership of buffer */
1210 static GstFlowReturn
1211 gst_dvdemux_demux_audio (GstDVDemux * dvdemux, GstBuffer * buffer,
1218 data = GST_BUFFER_DATA (buffer);
1220 dv_decode_full_audio (dvdemux->decoder, data, dvdemux->audio_buffers);
1222 if (G_LIKELY ((num_samples = dv_get_num_samples (dvdemux->decoder)) > 0)) {
1226 gint frequency, channels;
1228 if (G_UNLIKELY (dvdemux->audiosrcpad == NULL))
1229 dvdemux->audiosrcpad = gst_dvdemux_add_pad (dvdemux, &audio_src_temp);
1231 /* get initial format or check if format changed */
1232 frequency = dv_get_frequency (dvdemux->decoder);
1233 channels = dv_get_num_channels (dvdemux->decoder);
1235 if (G_UNLIKELY ((frequency != dvdemux->frequency)
1236 || (channels != dvdemux->channels))) {
1239 dvdemux->frequency = frequency;
1240 dvdemux->channels = channels;
1242 /* and set new caps */
1243 caps = gst_caps_new_simple ("audio/x-raw-int",
1244 "rate", G_TYPE_INT, frequency,
1245 "depth", G_TYPE_INT, 16,
1246 "width", G_TYPE_INT, 16,
1247 "signed", G_TYPE_BOOLEAN, TRUE,
1248 "channels", G_TYPE_INT, channels,
1249 "endianness", G_TYPE_INT, G_BYTE_ORDER, NULL);
1250 gst_pad_set_caps (dvdemux->audiosrcpad, caps);
1251 gst_caps_unref (caps);
1254 outbuf = gst_buffer_new_and_alloc (num_samples *
1255 sizeof (gint16) * dvdemux->channels);
1257 a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
1259 for (i = 0; i < num_samples; i++) {
1260 for (j = 0; j < dvdemux->channels; j++) {
1261 *(a_ptr++) = dvdemux->audio_buffers[j][i];
1265 GST_DEBUG ("pushing audio %" GST_TIME_FORMAT,
1266 GST_TIME_ARGS (dvdemux->time_segment.last_stop));
1268 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.last_stop;
1269 GST_BUFFER_DURATION (outbuf) = duration;
1270 GST_BUFFER_OFFSET (outbuf) = dvdemux->audio_offset;
1271 dvdemux->audio_offset += num_samples;
1272 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->audio_offset;
1274 if (dvdemux->new_media)
1275 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1276 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dvdemux->audiosrcpad));
1278 ret = gst_pad_push (dvdemux->audiosrcpad, outbuf);
1287 /* takes ownership of buffer */
1288 static GstFlowReturn
1289 gst_dvdemux_demux_video (GstDVDemux * dvdemux, GstBuffer * buffer,
1295 GstFlowReturn ret = GST_FLOW_OK;
1297 if (G_UNLIKELY (dvdemux->videosrcpad == NULL))
1298 dvdemux->videosrcpad = gst_dvdemux_add_pad (dvdemux, &video_src_temp);
1301 /* framerate is already up-to-date */
1302 height = dvdemux->decoder->height;
1303 wide = dv_format_wide (dvdemux->decoder);
1305 /* see if anything changed */
1306 if (G_UNLIKELY ((dvdemux->height != height) || dvdemux->wide != wide)) {
1310 dvdemux->height = height;
1311 dvdemux->wide = wide;
1313 if (dvdemux->decoder->system == e_dv_system_625_50) {
1315 par_x = PAL_WIDE_PAR_X;
1316 par_y = PAL_WIDE_PAR_Y;
1318 par_x = PAL_NORMAL_PAR_X;
1319 par_y = PAL_NORMAL_PAR_Y;
1323 par_x = NTSC_WIDE_PAR_X;
1324 par_y = NTSC_WIDE_PAR_Y;
1326 par_x = NTSC_NORMAL_PAR_X;
1327 par_y = NTSC_NORMAL_PAR_Y;
1331 caps = gst_caps_new_simple ("video/x-dv",
1332 "systemstream", G_TYPE_BOOLEAN, FALSE,
1333 "width", G_TYPE_INT, 720,
1334 "height", G_TYPE_INT, height,
1335 "framerate", GST_TYPE_FRACTION, dvdemux->framerate_numerator,
1336 dvdemux->framerate_denominator,
1337 "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
1338 gst_pad_set_caps (dvdemux->videosrcpad, caps);
1339 gst_caps_unref (caps);
1342 /* takes ownership of buffer here, we just need to modify
1344 outbuf = gst_buffer_make_metadata_writable (buffer);
1346 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.last_stop;
1347 GST_BUFFER_OFFSET (outbuf) = dvdemux->video_offset;
1348 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->video_offset + 1;
1349 GST_BUFFER_DURATION (outbuf) = duration;
1351 if (dvdemux->new_media)
1352 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1353 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dvdemux->videosrcpad));
1355 GST_DEBUG ("pushing video %" GST_TIME_FORMAT,
1356 GST_TIME_ARGS (dvdemux->time_segment.last_stop));
1358 ret = gst_pad_push (dvdemux->videosrcpad, outbuf);
1360 dvdemux->video_offset++;
1366 get_ssyb_offset (int dif, int ssyb)
1370 offset = dif * 12000; /* to dif */
1371 offset += 80 * (1 + (ssyb / 6)); /* to subcode pack */
1372 offset += 3; /* past header */
1373 offset += 8 * (ssyb % 6); /* to ssyb */
1379 gst_dvdemux_get_timecode (GstDVDemux * dvdemux, GstBuffer * buffer,
1380 GstSMPTETimeCode * timecode)
1382 guint8 *data = GST_BUFFER_DATA (buffer);
1385 int n_difs = dvdemux->decoder->num_dif_seqs;
1387 for (dif = 0; dif < n_difs; dif++) {
1388 offset = get_ssyb_offset (dif, 3);
1389 if (data[offset + 3] == 0x13) {
1390 timecode->frames = ((data[offset + 4] >> 4) & 0x3) * 10 +
1391 (data[offset + 4] & 0xf);
1392 timecode->seconds = ((data[offset + 5] >> 4) & 0x3) * 10 +
1393 (data[offset + 5] & 0xf);
1394 timecode->minutes = ((data[offset + 6] >> 4) & 0x3) * 10 +
1395 (data[offset + 6] & 0xf);
1396 timecode->hours = ((data[offset + 7] >> 4) & 0x3) * 10 +
1397 (data[offset + 7] & 0xf);
1398 GST_DEBUG ("got timecode %" GST_SMPTE_TIME_CODE_FORMAT,
1399 GST_SMPTE_TIME_CODE_ARGS (timecode));
1408 gst_dvdemux_is_new_media (GstDVDemux * dvdemux, GstBuffer * buffer)
1410 guint8 *data = GST_BUFFER_DATA (buffer);
1415 n_difs = dvdemux->decoder->num_dif_seqs;
1417 for (dif = 0; dif < n_difs; dif++) {
1419 aaux_offset = (dif * 12000) + (6 + 16 * 1) * 80 + 3;
1421 aaux_offset = (dif * 12000) + (6 + 16 * 4) * 80 + 3;
1423 if (data[aaux_offset + 0] == 0x51) {
1424 if ((data[aaux_offset + 2] & 0x80) == 0)
1432 /* takes ownership of buffer */
1433 static GstFlowReturn
1434 gst_dvdemux_demux_frame (GstDVDemux * dvdemux, GstBuffer * buffer)
1436 GstClockTime next_ts;
1437 GstFlowReturn aret, vret, ret;
1440 GstSMPTETimeCode timecode;
1443 if (G_UNLIKELY (dvdemux->need_segment)) {
1447 /* convert to time and store as start/end_timestamp */
1448 format = GST_FORMAT_TIME;
1449 if (!(gst_dvdemux_convert_sink_pair (dvdemux,
1450 GST_FORMAT_BYTES, dvdemux->byte_segment.start,
1451 dvdemux->byte_segment.stop, format,
1452 &dvdemux->time_segment.start, &dvdemux->time_segment.stop)))
1455 dvdemux->time_segment.rate = dvdemux->byte_segment.rate;
1456 dvdemux->time_segment.abs_rate = dvdemux->byte_segment.abs_rate;
1457 dvdemux->time_segment.last_stop = dvdemux->time_segment.start;
1459 /* calculate current frame number */
1460 format = GST_FORMAT_DEFAULT;
1461 if (!(gst_dvdemux_src_convert (dvdemux, dvdemux->videosrcpad,
1462 GST_FORMAT_TIME, dvdemux->time_segment.start,
1463 &format, &dvdemux->frame_offset)))
1466 GST_DEBUG_OBJECT (dvdemux, "sending segment start: %" GST_TIME_FORMAT
1467 ", stop: %" GST_TIME_FORMAT ", time: %" GST_TIME_FORMAT,
1468 GST_TIME_ARGS (dvdemux->time_segment.start),
1469 GST_TIME_ARGS (dvdemux->time_segment.stop),
1470 GST_TIME_ARGS (dvdemux->time_segment.start));
1472 event = gst_event_new_new_segment (FALSE, dvdemux->byte_segment.rate,
1473 GST_FORMAT_TIME, dvdemux->time_segment.start,
1474 dvdemux->time_segment.stop, dvdemux->time_segment.start);
1475 gst_dvdemux_push_event (dvdemux, event);
1477 dvdemux->need_segment = FALSE;
1480 gst_dvdemux_get_timecode (dvdemux, buffer, &timecode);
1481 gst_smpte_time_code_get_frame_number (
1482 (dvdemux->decoder->system == e_dv_system_625_50) ?
1483 GST_SMPTE_TIME_CODE_SYSTEM_25 : GST_SMPTE_TIME_CODE_SYSTEM_30,
1484 &frame_number, &timecode);
1486 next_ts = gst_util_uint64_scale_int (
1487 (dvdemux->frame_offset + 1) * GST_SECOND,
1488 dvdemux->framerate_denominator, dvdemux->framerate_numerator);
1489 duration = next_ts - dvdemux->time_segment.last_stop;
1491 data = GST_BUFFER_DATA (buffer);
1493 dv_parse_packs (dvdemux->decoder, data);
1494 dvdemux->new_media = FALSE;
1495 if (gst_dvdemux_is_new_media (dvdemux, buffer) &&
1496 dvdemux->frames_since_new_media > 2) {
1497 dvdemux->new_media = TRUE;
1498 dvdemux->frames_since_new_media = 0;
1500 dvdemux->frames_since_new_media++;
1502 /* does not take ownership of buffer */
1503 aret = ret = gst_dvdemux_demux_audio (dvdemux, buffer, duration);
1504 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)) {
1505 gst_buffer_unref (buffer);
1509 /* takes ownership of buffer */
1510 vret = ret = gst_dvdemux_demux_video (dvdemux, buffer, duration);
1511 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED))
1514 /* if both are not linked, we stop */
1515 if (G_UNLIKELY (aret == GST_FLOW_NOT_LINKED && vret == GST_FLOW_NOT_LINKED)) {
1516 ret = GST_FLOW_NOT_LINKED;
1520 gst_segment_set_last_stop (&dvdemux->time_segment, GST_FORMAT_TIME, next_ts);
1521 dvdemux->frame_offset++;
1523 /* check for the end of the segment */
1524 if (dvdemux->time_segment.stop != -1 && next_ts > dvdemux->time_segment.stop)
1525 ret = GST_FLOW_UNEXPECTED;
1535 GST_DEBUG ("error generating new_segment event");
1536 gst_buffer_unref (buffer);
1537 return GST_FLOW_ERROR;
1541 /* flush any remaining data in the adapter, used in chain based scheduling mode */
1542 static GstFlowReturn
1543 gst_dvdemux_flush (GstDVDemux * dvdemux)
1545 GstFlowReturn ret = GST_FLOW_OK;
1547 while (gst_adapter_available (dvdemux->adapter) >= dvdemux->frame_len) {
1551 /* get the accumulated bytes */
1552 data = gst_adapter_peek (dvdemux->adapter, dvdemux->frame_len);
1554 /* parse header to know the length and other params */
1555 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0))
1556 goto parse_header_error;
1558 /* after parsing the header we know the length of the data */
1559 length = dvdemux->frame_len = dvdemux->decoder->frame_size;
1560 if (dvdemux->decoder->system == e_dv_system_625_50) {
1561 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1562 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1564 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1565 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1567 g_atomic_int_set (&dvdemux->found_header, 1);
1569 /* let demux_video set the height, it needs to detect when things change so
1570 * it can reset caps */
1572 /* if we still have enough for a frame, start decoding */
1573 if (G_LIKELY (gst_adapter_available (dvdemux->adapter) >= length)) {
1576 data = gst_adapter_take (dvdemux->adapter, length);
1578 /* create buffer for the remainder of the code */
1579 buffer = gst_buffer_new ();
1580 GST_BUFFER_DATA (buffer) = (guint8 *) data;
1581 GST_BUFFER_SIZE (buffer) = length;
1582 GST_BUFFER_MALLOCDATA (buffer) = (guint8 *) data;
1584 /* and decode the buffer, takes ownership */
1585 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1586 if (G_UNLIKELY (ret != GST_FLOW_OK))
1596 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1597 (NULL), ("Error parsing DV header"));
1598 return GST_FLOW_ERROR;
1602 /* streaming operation:
1604 * accumulate data until we have a frame, then decode.
1606 static GstFlowReturn
1607 gst_dvdemux_chain (GstPad * pad, GstBuffer * buffer)
1609 GstDVDemux *dvdemux;
1611 GstClockTime timestamp;
1613 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1615 /* a discontinuity in the stream, we need to get rid of
1616 * accumulated data in the adapter and assume a new frame
1617 * starts after the discontinuity */
1618 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)))
1619 gst_adapter_clear (dvdemux->adapter);
1621 /* a timestamp always should be respected */
1622 timestamp = GST_BUFFER_TIMESTAMP (buffer);
1623 if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
1624 gst_segment_set_last_stop (&dvdemux->time_segment, GST_FORMAT_TIME,
1626 /* FIXME, adjust frame_offset and other counters */
1629 gst_adapter_push (dvdemux->adapter, buffer);
1631 /* Apparently dv_parse_header can read from the body of the frame
1632 * too, so it needs more than header_size bytes. Wacky!
1634 if (G_UNLIKELY (dvdemux->frame_len == -1)) {
1635 /* if we don't know the length of a frame, we assume it is
1636 * the NTSC_BUFFER length, as this is enough to figure out
1637 * if this is PAL or NTSC */
1638 dvdemux->frame_len = NTSC_BUFFER;
1641 /* and try to flush pending frames */
1642 ret = gst_dvdemux_flush (dvdemux);
1644 gst_object_unref (dvdemux);
1649 /* pull based operation.
1651 * Read header first to figure out the frame size. Then read
1652 * and decode full frames.
1655 gst_dvdemux_loop (GstPad * pad)
1658 GstDVDemux *dvdemux;
1659 GstBuffer *buffer = NULL;
1662 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1664 if (G_UNLIKELY (g_atomic_int_get (&dvdemux->found_header) == 0)) {
1665 GST_DEBUG_OBJECT (dvdemux, "pulling first buffer");
1666 /* pull in NTSC sized buffer to figure out the frame
1668 ret = gst_pad_pull_range (dvdemux->sinkpad,
1669 dvdemux->byte_segment.last_stop, NTSC_BUFFER, &buffer);
1670 if (G_UNLIKELY (ret != GST_FLOW_OK))
1673 /* check buffer size, don't want to read small buffers */
1674 if (G_UNLIKELY (GST_BUFFER_SIZE (buffer) < NTSC_BUFFER))
1677 data = GST_BUFFER_DATA (buffer);
1679 /* parse header to know the length and other params */
1680 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0))
1681 goto parse_header_error;
1683 /* after parsing the header we know the length of the data */
1684 dvdemux->frame_len = dvdemux->decoder->frame_size;
1685 if (dvdemux->decoder->system == e_dv_system_625_50) {
1686 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1687 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1689 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1690 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1692 dvdemux->need_segment = TRUE;
1694 /* see if we need to read a larger part */
1695 if (dvdemux->frame_len != NTSC_BUFFER) {
1696 gst_buffer_unref (buffer);
1703 /* setting header and prrforming the seek must be atomic */
1704 GST_OBJECT_LOCK (dvdemux);
1705 /* got header now */
1706 g_atomic_int_set (&dvdemux->found_header, 1);
1708 /* now perform pending seek if any. */
1709 event = dvdemux->seek_event;
1711 gst_event_ref (event);
1712 GST_OBJECT_UNLOCK (dvdemux);
1715 if (!gst_dvdemux_handle_pull_seek (dvdemux, dvdemux->videosrcpad,
1717 GST_ELEMENT_WARNING (dvdemux, STREAM, DECODE, (NULL),
1718 ("Error perfoming initial seek"));
1720 gst_event_unref (event);
1722 /* and we need to pull a new buffer in all cases. */
1724 gst_buffer_unref (buffer);
1732 if (G_UNLIKELY (dvdemux->pending_segment)) {
1734 /* now send the newsegment */
1735 GST_DEBUG_OBJECT (dvdemux, "Sending newsegment from");
1737 gst_dvdemux_push_event (dvdemux, dvdemux->pending_segment);
1738 dvdemux->pending_segment = NULL;
1741 if (G_LIKELY (buffer == NULL)) {
1742 GST_DEBUG_OBJECT (dvdemux, "pulling buffer at offset %" G_GINT64_FORMAT,
1743 dvdemux->byte_segment.last_stop);
1745 ret = gst_pad_pull_range (dvdemux->sinkpad,
1746 dvdemux->byte_segment.last_stop, dvdemux->frame_len, &buffer);
1747 if (ret != GST_FLOW_OK)
1750 /* check buffer size, don't want to read small buffers */
1751 if (GST_BUFFER_SIZE (buffer) < dvdemux->frame_len)
1754 /* and decode the buffer */
1755 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1756 if (G_UNLIKELY (ret != GST_FLOW_OK))
1759 /* and position ourselves for the next buffer */
1760 dvdemux->byte_segment.last_stop += dvdemux->frame_len;
1763 gst_object_unref (dvdemux);
1770 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1771 (NULL), ("Error parsing DV header"));
1772 gst_buffer_unref (buffer);
1773 dvdemux->running = FALSE;
1774 gst_pad_pause_task (dvdemux->sinkpad);
1775 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1780 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1781 (NULL), ("Error reading buffer"));
1782 gst_buffer_unref (buffer);
1783 dvdemux->running = FALSE;
1784 gst_pad_pause_task (dvdemux->sinkpad);
1785 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1790 GST_INFO_OBJECT (dvdemux, "pausing task, %s", gst_flow_get_name (ret));
1791 dvdemux->running = FALSE;
1792 gst_pad_pause_task (dvdemux->sinkpad);
1793 if (ret == GST_FLOW_UNEXPECTED) {
1794 GST_LOG_OBJECT (dvdemux, "got eos");
1795 /* perform EOS logic */
1796 if (dvdemux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1797 gst_element_post_message (GST_ELEMENT (dvdemux),
1798 gst_message_new_segment_done (GST_OBJECT_CAST (dvdemux),
1799 dvdemux->time_segment.format, dvdemux->time_segment.last_stop));
1801 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1803 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_UNEXPECTED) {
1804 /* for fatal errors or not-linked we post an error message */
1805 GST_ELEMENT_ERROR (dvdemux, STREAM, FAILED,
1806 (NULL), ("streaming stopped, reason %s", gst_flow_get_name (ret)));
1807 gst_dvdemux_push_event (dvdemux, gst_event_new_eos ());
1814 gst_dvdemux_sink_activate_push (GstPad * sinkpad, gboolean active)
1816 GstDVDemux *demux = GST_DVDEMUX (gst_pad_get_parent (sinkpad));
1819 demux->seek_handler = gst_dvdemux_handle_push_seek;
1821 demux->seek_handler = NULL;
1823 gst_object_unref (demux);
1829 gst_dvdemux_sink_activate_pull (GstPad * sinkpad, gboolean active)
1831 GstDVDemux *demux = GST_DVDEMUX (gst_pad_get_parent (sinkpad));
1834 demux->running = TRUE;
1835 demux->seek_handler = gst_dvdemux_handle_pull_seek;
1836 gst_pad_start_task (sinkpad, (GstTaskFunction) gst_dvdemux_loop, sinkpad);
1838 demux->seek_handler = NULL;
1839 gst_pad_stop_task (sinkpad);
1840 demux->running = FALSE;
1843 gst_object_unref (demux);
1848 /* decide on push or pull based scheduling */
1850 gst_dvdemux_sink_activate (GstPad * sinkpad)
1854 if (gst_pad_check_pull_range (sinkpad))
1855 ret = gst_pad_activate_pull (sinkpad, TRUE);
1857 ret = gst_pad_activate_push (sinkpad, TRUE);
1862 static GstStateChangeReturn
1863 gst_dvdemux_change_state (GstElement * element, GstStateChange transition)
1865 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1866 GstStateChangeReturn ret;
1868 switch (transition) {
1869 case GST_STATE_CHANGE_NULL_TO_READY:
1871 case GST_STATE_CHANGE_READY_TO_PAUSED:
1872 dvdemux->decoder = dv_decoder_new (0, FALSE, FALSE);
1873 dv_set_error_log (dvdemux->decoder, NULL);
1874 gst_dvdemux_reset (dvdemux);
1876 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1882 ret = parent_class->change_state (element, transition);
1884 switch (transition) {
1885 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1887 case GST_STATE_CHANGE_PAUSED_TO_READY:
1888 gst_adapter_clear (dvdemux->adapter);
1889 dv_decoder_free (dvdemux->decoder);
1890 dvdemux->decoder = NULL;
1892 gst_dvdemux_remove_pads (dvdemux);
1894 case GST_STATE_CHANGE_READY_TO_NULL:
1898 event_p = &dvdemux->seek_event;
1899 gst_event_replace (event_p, NULL);
1900 if (dvdemux->pending_segment)
1901 gst_event_unref (dvdemux->pending_segment);
1902 dvdemux->pending_segment = NULL;