2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * <2005> Wim Taymans <wim@fluendo.com>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
28 #include <gst/audio/audio.h>
29 #include "gstdvdemux.h"
30 #include "gstsmptetimecode.h"
33 * SECTION:element-dvdemux
35 * dvdemux splits raw DV into its audio and video components. The audio will be
36 * decoded raw samples and the video will be encoded DV video.
38 * This element can operate in both push and pull mode depending on the
39 * capabilities of the upstream peer.
42 * <title>Example launch line</title>
44 * gst-launch-1.0 filesrc location=test.dv ! dvdemux name=demux ! queue ! audioconvert ! alsasink demux. ! queue ! dvdec ! xvimagesink
45 * ]| This pipeline decodes and renders the raw DV stream to an audio and a videosink.
49 /* DV output has two modes, normal and wide. The resolution is the same in both
50 * cases: 720 pixels wide by 576 pixels tall in PAL format, and 720x480 for
53 * Each of the modes has its own pixel aspect ratio, which is fixed in practice
54 * by ITU-R BT.601 (also known as "CCIR-601" or "Rec.601"). Or so claims a
55 * reference that I culled from the reliable "internet",
56 * http://www.mir.com/DMG/aspect.html. Normal PAL is 59/54 and normal NTSC is
57 * 10/11. Because the pixel resolution is the same for both cases, we can get
58 * the pixel aspect ratio for wide recordings by multiplying by the ratio of
59 * display aspect ratios, 16/9 (for wide) divided by 4/3 (for normal):
61 * Wide NTSC: 10/11 * (16/9)/(4/3) = 40/33
62 * Wide PAL: 59/54 * (16/9)/(4/3) = 118/81
64 * However, the pixel resolution coming out of a DV source does not combine with
65 * the standard pixel aspect ratios to give a proper display aspect ratio. An
66 * image 480 pixels tall, with a 4:3 display aspect ratio, will be 768 pixels
67 * wide. But, if we take the normal PAL aspect ratio of 59/54, and multiply it
68 * with the width of the DV image (720 pixels), we get 786.666..., which is
69 * nonintegral and too wide. The camera is not outputting a 4:3 image.
71 * If the video sink for this stream has fixed dimensions (such as for
72 * fullscreen playback, or for a java applet in a web page), you then have two
73 * choices. Either you show the whole image, but pad the image with black
74 * borders on the top and bottom (like watching a widescreen video on a 4:3
75 * device), or you crop the video to the proper ratio. Apparently the latter is
76 * the standard practice.
78 * For its part, GStreamer is concerned with accuracy and preservation of
79 * information. This element outputs the 720x576 or 720x480 video that it
80 * recieves, noting the proper aspect ratio. This should not be a problem for
81 * windowed applications, which can change size to fit the video. Applications
82 * with fixed size requirements should decide whether to crop or pad which
83 * an element such as videobox can do.
86 #define NTSC_HEIGHT 480
87 #define NTSC_BUFFER 120000
88 #define NTSC_FRAMERATE_NUMERATOR 30000
89 #define NTSC_FRAMERATE_DENOMINATOR 1001
91 #define PAL_HEIGHT 576
92 #define PAL_BUFFER 144000
93 #define PAL_FRAMERATE_NUMERATOR 25
94 #define PAL_FRAMERATE_DENOMINATOR 1
96 #define PAL_NORMAL_PAR_X 16
97 #define PAL_NORMAL_PAR_Y 15
98 #define PAL_WIDE_PAR_X 64
99 #define PAL_WIDE_PAR_Y 45
101 #define NTSC_NORMAL_PAR_X 8
102 #define NTSC_NORMAL_PAR_Y 9
103 #define NTSC_WIDE_PAR_X 32
104 #define NTSC_WIDE_PAR_Y 27
106 GST_DEBUG_CATEGORY_STATIC (dvdemux_debug);
107 #define GST_CAT_DEFAULT dvdemux_debug
109 static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
112 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true")
115 static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video",
118 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) false")
121 static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
124 GST_STATIC_CAPS ("audio/x-raw, "
125 "format = (string) " GST_AUDIO_NE (S16) ", "
126 "layout = (string) interleaved, "
127 "rate = (int) { 32000, 44100, 48000 }, " "channels = (int) {2, 4}")
131 #define gst_dvdemux_parent_class parent_class
132 G_DEFINE_TYPE (GstDVDemux, gst_dvdemux, GST_TYPE_ELEMENT);
134 static void gst_dvdemux_finalize (GObject * object);
136 /* query functions */
137 static gboolean gst_dvdemux_src_query (GstPad * pad, GstObject * parent,
139 static gboolean gst_dvdemux_sink_query (GstPad * pad, GstObject * parent,
142 /* convert functions */
143 static gboolean gst_dvdemux_sink_convert (GstDVDemux * demux,
144 GstFormat src_format, gint64 src_value, GstFormat dest_format,
145 gint64 * dest_value);
146 static gboolean gst_dvdemux_src_convert (GstDVDemux * demux, GstPad * pad,
147 GstFormat src_format, gint64 src_value, GstFormat dest_format,
148 gint64 * dest_value);
150 /* event functions */
151 static gboolean gst_dvdemux_send_event (GstElement * element, GstEvent * event);
152 static gboolean gst_dvdemux_handle_src_event (GstPad * pad, GstObject * parent,
154 static gboolean gst_dvdemux_handle_sink_event (GstPad * pad, GstObject * parent,
157 /* scheduling functions */
158 static void gst_dvdemux_loop (GstPad * pad);
159 static GstFlowReturn gst_dvdemux_flush (GstDVDemux * dvdemux);
160 static GstFlowReturn gst_dvdemux_chain (GstPad * pad, GstObject * parent,
163 /* state change functions */
164 static gboolean gst_dvdemux_sink_activate (GstPad * sinkpad,
166 static gboolean gst_dvdemux_sink_activate_mode (GstPad * sinkpad,
167 GstObject * parent, GstPadMode mode, gboolean active);
168 static GstStateChangeReturn gst_dvdemux_change_state (GstElement * element,
169 GstStateChange transition);
172 gst_dvdemux_class_init (GstDVDemuxClass * klass)
174 GObjectClass *gobject_class;
175 GstElementClass *gstelement_class;
177 gobject_class = (GObjectClass *) klass;
178 gstelement_class = (GstElementClass *) klass;
180 gobject_class->finalize = gst_dvdemux_finalize;
182 gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_dvdemux_change_state);
183 gstelement_class->send_event = GST_DEBUG_FUNCPTR (gst_dvdemux_send_event);
185 gst_element_class_add_static_pad_template (gstelement_class, &sink_temp);
186 gst_element_class_add_static_pad_template (gstelement_class, &video_src_temp);
187 gst_element_class_add_static_pad_template (gstelement_class, &audio_src_temp);
189 gst_element_class_set_static_metadata (gstelement_class,
190 "DV system stream demuxer", "Codec/Demuxer",
191 "Uses libdv to separate DV audio from DV video (libdv.sourceforge.net)",
192 "Erik Walthinsen <omega@cse.ogi.edu>, Wim Taymans <wim@fluendo.com>");
194 GST_DEBUG_CATEGORY_INIT (dvdemux_debug, "dvdemux", 0, "DV demuxer element");
198 gst_dvdemux_init (GstDVDemux * dvdemux)
202 dvdemux->sinkpad = gst_pad_new_from_static_template (&sink_temp, "sink");
203 /* we can operate in pull and push mode so we install
204 * a custom activate function */
205 gst_pad_set_activate_function (dvdemux->sinkpad,
206 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate));
207 /* the function to activate in push mode */
208 gst_pad_set_activatemode_function (dvdemux->sinkpad,
209 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_activate_mode));
210 /* for push mode, this is the chain function */
211 gst_pad_set_chain_function (dvdemux->sinkpad,
212 GST_DEBUG_FUNCPTR (gst_dvdemux_chain));
213 /* handling events (in push mode only) */
214 gst_pad_set_event_function (dvdemux->sinkpad,
215 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_sink_event));
216 /* query functions */
217 gst_pad_set_query_function (dvdemux->sinkpad,
218 GST_DEBUG_FUNCPTR (gst_dvdemux_sink_query));
220 /* now add the pad */
221 gst_element_add_pad (GST_ELEMENT (dvdemux), dvdemux->sinkpad);
223 dvdemux->adapter = gst_adapter_new ();
225 /* we need 4 temp buffers for audio decoding which are of a static
226 * size and which we can allocate here */
227 for (i = 0; i < 4; i++) {
228 dvdemux->audio_buffers[i] =
229 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
234 gst_dvdemux_finalize (GObject * object)
239 dvdemux = GST_DVDEMUX (object);
241 g_object_unref (dvdemux->adapter);
243 /* clean up temp audio buffers */
244 for (i = 0; i < 4; i++) {
245 g_free (dvdemux->audio_buffers[i]);
248 G_OBJECT_CLASS (parent_class)->finalize (object);
251 /* reset to default values before starting streaming */
253 gst_dvdemux_reset (GstDVDemux * dvdemux)
255 dvdemux->frame_offset = 0;
256 dvdemux->audio_offset = 0;
257 dvdemux->video_offset = 0;
258 dvdemux->discont = TRUE;
259 g_atomic_int_set (&dvdemux->found_header, 0);
260 dvdemux->frame_len = -1;
261 dvdemux->need_segment = FALSE;
262 dvdemux->new_media = FALSE;
263 dvdemux->framerate_numerator = 0;
264 dvdemux->framerate_denominator = 0;
266 dvdemux->frequency = 0;
267 dvdemux->channels = 0;
268 dvdemux->wide = FALSE;
269 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
270 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
271 dvdemux->segment_seqnum = 0;
272 dvdemux->upstream_time_segment = FALSE;
273 dvdemux->have_group_id = FALSE;
274 dvdemux->group_id = G_MAXUINT;
278 have_group_id (GstDVDemux * demux)
282 event = gst_pad_get_sticky_event (demux->sinkpad, GST_EVENT_STREAM_START, 0);
284 if (gst_event_parse_group_id (event, &demux->group_id))
285 demux->have_group_id = TRUE;
287 demux->have_group_id = FALSE;
288 gst_event_unref (event);
289 } else if (!demux->have_group_id) {
290 demux->have_group_id = TRUE;
291 demux->group_id = gst_util_group_id_next ();
294 return demux->have_group_id;
298 gst_dvdemux_add_pad (GstDVDemux * dvdemux, GstStaticPadTemplate * template,
301 gboolean no_more_pads;
305 gchar rec_datetime[40];
308 pad = gst_pad_new_from_static_template (template, template->name_template);
310 gst_pad_set_query_function (pad, GST_DEBUG_FUNCPTR (gst_dvdemux_src_query));
312 gst_pad_set_event_function (pad,
313 GST_DEBUG_FUNCPTR (gst_dvdemux_handle_src_event));
314 gst_pad_use_fixed_caps (pad);
315 gst_pad_set_active (pad, TRUE);
318 gst_pad_create_stream_id (pad,
319 GST_ELEMENT_CAST (dvdemux),
320 template == &video_src_temp ? "video" : "audio");
321 event = gst_event_new_stream_start (stream_id);
322 if (have_group_id (dvdemux))
323 gst_event_set_group_id (event, dvdemux->group_id);
324 gst_pad_push_event (pad, event);
327 gst_pad_set_caps (pad, caps);
329 gst_pad_push_event (pad, gst_event_new_segment (&dvdemux->time_segment));
331 gst_element_add_pad (GST_ELEMENT (dvdemux), pad);
334 (dvdemux->videosrcpad != NULL && template == &audio_src_temp) ||
335 (dvdemux->audiosrcpad != NULL && template == &video_src_temp);
338 gst_element_no_more_pads (GST_ELEMENT (dvdemux));
343 tags = gst_tag_list_new (GST_TAG_CONTAINER_FORMAT, "DV", NULL);
344 gst_tag_list_set_scope (tags, GST_TAG_SCOPE_GLOBAL);
346 if (dv_get_recording_datetime (dvdemux->decoder, rec_datetime)) {
347 rec_dt = gst_date_time_new_from_iso8601_string (rec_datetime);
349 gst_tag_list_add (tags, GST_TAG_MERGE_REPLACE, GST_TAG_DATE_TIME,
351 gst_date_time_unref (rec_dt);
355 if (dvdemux->videosrcpad)
356 gst_pad_push_event (dvdemux->videosrcpad,
357 gst_event_new_tag (gst_tag_list_ref (tags)));
358 if (dvdemux->audiosrcpad)
359 gst_pad_push_event (dvdemux->audiosrcpad,
360 gst_event_new_tag (gst_tag_list_ref (tags)));
361 gst_tag_list_unref (tags);
368 gst_dvdemux_remove_pads (GstDVDemux * dvdemux)
370 if (dvdemux->videosrcpad) {
371 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->videosrcpad);
372 dvdemux->videosrcpad = NULL;
374 if (dvdemux->audiosrcpad) {
375 gst_element_remove_pad (GST_ELEMENT (dvdemux), dvdemux->audiosrcpad);
376 dvdemux->audiosrcpad = NULL;
381 gst_dvdemux_src_convert (GstDVDemux * dvdemux, GstPad * pad,
382 GstFormat src_format, gint64 src_value, GstFormat dest_format,
387 if (dest_format == src_format || src_value == -1) {
388 *dest_value = src_value;
392 if (dvdemux->frame_len <= 0)
395 if (dvdemux->decoder == NULL)
398 GST_INFO_OBJECT (pad,
399 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
400 src_value, src_format, dest_format);
402 switch (src_format) {
403 case GST_FORMAT_BYTES:
404 switch (dest_format) {
405 case GST_FORMAT_DEFAULT:
406 if (pad == dvdemux->videosrcpad)
407 *dest_value = src_value / dvdemux->frame_len;
408 else if (pad == dvdemux->audiosrcpad)
409 *dest_value = src_value / (2 * dvdemux->channels);
411 case GST_FORMAT_TIME:
412 if (pad == dvdemux->videosrcpad)
413 *dest_value = gst_util_uint64_scale (src_value,
414 GST_SECOND * dvdemux->framerate_denominator,
415 dvdemux->frame_len * dvdemux->framerate_numerator);
416 else if (pad == dvdemux->audiosrcpad)
417 *dest_value = gst_util_uint64_scale_int (src_value, GST_SECOND,
418 2 * dvdemux->frequency * dvdemux->channels);
424 case GST_FORMAT_TIME:
425 switch (dest_format) {
426 case GST_FORMAT_BYTES:
427 if (pad == dvdemux->videosrcpad)
428 *dest_value = gst_util_uint64_scale (src_value,
429 dvdemux->frame_len * dvdemux->framerate_numerator,
430 dvdemux->framerate_denominator * GST_SECOND);
431 else if (pad == dvdemux->audiosrcpad)
432 *dest_value = gst_util_uint64_scale_int (src_value,
433 2 * dvdemux->frequency * dvdemux->channels, GST_SECOND);
435 case GST_FORMAT_DEFAULT:
436 if (pad == dvdemux->videosrcpad) {
438 *dest_value = gst_util_uint64_scale (src_value,
439 dvdemux->framerate_numerator,
440 dvdemux->framerate_denominator * GST_SECOND);
443 } else if (pad == dvdemux->audiosrcpad) {
444 *dest_value = gst_util_uint64_scale (src_value,
445 dvdemux->frequency, GST_SECOND);
452 case GST_FORMAT_DEFAULT:
453 switch (dest_format) {
454 case GST_FORMAT_TIME:
455 if (pad == dvdemux->videosrcpad) {
456 *dest_value = gst_util_uint64_scale (src_value,
457 GST_SECOND * dvdemux->framerate_denominator,
458 dvdemux->framerate_numerator);
459 } else if (pad == dvdemux->audiosrcpad) {
461 *dest_value = gst_util_uint64_scale (src_value,
462 GST_SECOND, dvdemux->frequency);
467 case GST_FORMAT_BYTES:
468 if (pad == dvdemux->videosrcpad) {
469 *dest_value = src_value * dvdemux->frame_len;
470 } else if (pad == dvdemux->audiosrcpad) {
471 *dest_value = src_value * 2 * dvdemux->channels;
483 GST_INFO_OBJECT (pad,
484 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
485 dest_format, *dest_value, res);
491 GST_INFO ("source conversion failed");
497 gst_dvdemux_sink_convert (GstDVDemux * dvdemux, GstFormat src_format,
498 gint64 src_value, GstFormat dest_format, gint64 * dest_value)
502 GST_DEBUG_OBJECT (dvdemux, "%d -> %d", src_format, dest_format);
503 GST_INFO_OBJECT (dvdemux,
504 "src_value:%" G_GINT64_FORMAT ", src_format:%d, dest_format:%d",
505 src_value, src_format, dest_format);
507 if (dest_format == src_format || src_value == -1) {
508 *dest_value = src_value;
512 if (dvdemux->frame_len <= 0)
515 switch (src_format) {
516 case GST_FORMAT_BYTES:
517 switch (dest_format) {
518 case GST_FORMAT_TIME:
522 /* get frame number, rounds down so don't combine this
523 * line and the next line. */
524 frame = src_value / dvdemux->frame_len;
526 *dest_value = gst_util_uint64_scale (frame,
527 GST_SECOND * dvdemux->framerate_denominator,
528 dvdemux->framerate_numerator);
535 case GST_FORMAT_TIME:
536 switch (dest_format) {
537 case GST_FORMAT_BYTES:
541 /* calculate the frame */
543 gst_util_uint64_scale (src_value, dvdemux->framerate_numerator,
544 dvdemux->framerate_denominator * GST_SECOND);
546 /* calculate the offset from the rounded frame */
547 *dest_value = frame * dvdemux->frame_len;
557 GST_INFO_OBJECT (dvdemux,
558 "Result : dest_format:%d, dest_value:%" G_GINT64_FORMAT ", res:%d",
559 dest_format, *dest_value, res);
566 GST_INFO_OBJECT (dvdemux, "sink conversion failed");
572 gst_dvdemux_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
577 dvdemux = GST_DVDEMUX (parent);
579 switch (GST_QUERY_TYPE (query)) {
580 case GST_QUERY_POSITION:
585 /* get target format */
586 gst_query_parse_position (query, &format, NULL);
588 /* bring the position to the requested format. */
589 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
590 GST_FORMAT_TIME, dvdemux->time_segment.position,
593 gst_query_set_position (query, format, cur);
596 case GST_QUERY_DURATION:
602 /* First ask the peer in the original format */
603 if (!gst_pad_peer_query (dvdemux->sinkpad, query)) {
604 /* get target format */
605 gst_query_parse_duration (query, &format, NULL);
607 /* Now ask the peer in BYTES format and try to convert */
608 pquery = gst_query_new_duration (GST_FORMAT_BYTES);
609 if (!gst_pad_peer_query (dvdemux->sinkpad, pquery)) {
610 gst_query_unref (pquery);
614 /* get peer total length */
615 gst_query_parse_duration (pquery, NULL, &end);
616 gst_query_unref (pquery);
618 /* convert end to requested format */
620 if (!(res = gst_dvdemux_sink_convert (dvdemux,
621 GST_FORMAT_BYTES, end, format, &end))) {
624 gst_query_set_duration (query, format, end);
629 case GST_QUERY_CONVERT:
631 GstFormat src_fmt, dest_fmt;
632 gint64 src_val, dest_val;
634 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
636 gst_dvdemux_src_convert (dvdemux, pad, src_fmt, src_val,
637 dest_fmt, &dest_val)))
639 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
642 case GST_QUERY_SEEKING:
648 gst_query_parse_seeking (query, &fmt, NULL, NULL, NULL);
650 /* We can only handle TIME seeks really */
651 if (fmt != GST_FORMAT_TIME) {
652 gst_query_set_seeking (query, fmt, FALSE, -1, -1);
656 /* First ask upstream */
657 if (gst_pad_peer_query (dvdemux->sinkpad, query)) {
658 gst_query_parse_seeking (query, NULL, &seekable, NULL, NULL);
667 peerquery = gst_query_new_seeking (GST_FORMAT_BYTES);
668 seekable = gst_pad_peer_query (dvdemux->sinkpad, peerquery);
671 gst_query_parse_seeking (peerquery, NULL, &seekable, NULL, NULL);
672 gst_query_unref (peerquery);
675 peerquery = gst_query_new_duration (GST_FORMAT_TIME);
676 seekable = gst_dvdemux_src_query (pad, parent, peerquery);
681 gst_query_parse_duration (peerquery, NULL, &duration);
682 gst_query_set_seeking (query, GST_FORMAT_TIME, seekable, 0, duration);
684 gst_query_set_seeking (query, GST_FORMAT_TIME, FALSE, -1, -1);
687 gst_query_unref (peerquery);
689 gst_query_set_seeking (query, GST_FORMAT_TIME, FALSE, -1, -1);
694 res = gst_pad_query_default (pad, parent, query);
703 GST_DEBUG ("error source query");
709 gst_dvdemux_sink_query (GstPad * pad, GstObject * parent, GstQuery * query)
714 dvdemux = GST_DVDEMUX (parent);
716 switch (GST_QUERY_TYPE (query)) {
717 case GST_QUERY_CONVERT:
719 GstFormat src_fmt, dest_fmt;
720 gint64 src_val, dest_val;
722 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
724 gst_dvdemux_sink_convert (dvdemux, src_fmt, src_val, dest_fmt,
727 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
731 res = gst_pad_query_default (pad, parent, query);
740 GST_DEBUG ("error handling sink query");
745 /* takes ownership of the event */
747 gst_dvdemux_push_event (GstDVDemux * dvdemux, GstEvent * event)
749 gboolean res = FALSE;
751 if (dvdemux->videosrcpad) {
752 gst_event_ref (event);
753 res |= gst_pad_push_event (dvdemux->videosrcpad, event);
756 if (dvdemux->audiosrcpad)
757 res |= gst_pad_push_event (dvdemux->audiosrcpad, event);
759 gst_event_unref (event);
767 gst_dvdemux_handle_sink_event (GstPad * pad, GstObject * parent,
770 GstDVDemux *dvdemux = GST_DVDEMUX (parent);
773 switch (GST_EVENT_TYPE (event)) {
774 case GST_EVENT_FLUSH_START:
775 /* we are not blocking on anything exect the push() calls
776 * to the peer which will be unblocked by forwarding the
778 res = gst_dvdemux_push_event (dvdemux, event);
780 case GST_EVENT_FLUSH_STOP:
781 gst_adapter_clear (dvdemux->adapter);
782 GST_DEBUG ("cleared adapter");
783 gst_segment_init (&dvdemux->byte_segment, GST_FORMAT_BYTES);
784 gst_segment_init (&dvdemux->time_segment, GST_FORMAT_TIME);
785 dvdemux->discont = TRUE;
786 res = gst_dvdemux_push_event (dvdemux, event);
788 case GST_EVENT_SEGMENT:
790 const GstSegment *segment;
792 gst_event_parse_segment (event, &segment);
793 switch (segment->format) {
794 case GST_FORMAT_BYTES:
795 gst_segment_copy_into (segment, &dvdemux->byte_segment);
796 dvdemux->need_segment = TRUE;
797 dvdemux->segment_seqnum = gst_event_get_seqnum (event);
798 gst_event_unref (event);
800 case GST_FORMAT_TIME:
801 gst_segment_copy_into (segment, &dvdemux->time_segment);
803 dvdemux->upstream_time_segment = TRUE;
804 dvdemux->segment_seqnum = gst_event_get_seqnum (event);
806 /* and we can just forward this time event */
807 res = gst_dvdemux_push_event (dvdemux, event);
810 gst_event_unref (event);
811 /* cannot accept this format */
818 /* flush any pending data, should be nothing left. */
819 gst_dvdemux_flush (dvdemux);
821 res = gst_dvdemux_push_event (dvdemux, event);
822 /* and clear the adapter */
823 gst_adapter_clear (dvdemux->adapter);
826 gst_event_unref (event);
829 res = gst_dvdemux_push_event (dvdemux, event);
836 /* convert a pair of values on the given srcpad */
838 gst_dvdemux_convert_src_pair (GstDVDemux * dvdemux, GstPad * pad,
839 GstFormat src_format, gint64 src_start, gint64 src_stop,
840 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
844 GST_INFO ("starting conversion of start");
845 /* bring the format to time on srcpad. */
846 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
847 src_format, src_start, dst_format, dst_start))) {
850 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
852 GST_INFO ("starting conversion of stop");
853 /* bring the format to time on srcpad. */
854 if (!(res = gst_dvdemux_src_convert (dvdemux, pad,
855 src_format, src_stop, dst_format, dst_stop))) {
856 /* could not convert seek format to time offset */
859 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
864 /* convert a pair of values on the sinkpad */
866 gst_dvdemux_convert_sink_pair (GstDVDemux * dvdemux,
867 GstFormat src_format, gint64 src_start, gint64 src_stop,
868 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
872 GST_INFO ("starting conversion of start");
873 /* bring the format to time on srcpad. */
874 if (!(res = gst_dvdemux_sink_convert (dvdemux,
875 src_format, src_start, dst_format, dst_start))) {
878 GST_INFO ("Finished conversion of start: %" G_GINT64_FORMAT, *dst_start);
880 GST_INFO ("starting conversion of stop");
881 /* bring the format to time on srcpad. */
882 if (!(res = gst_dvdemux_sink_convert (dvdemux,
883 src_format, src_stop, dst_format, dst_stop))) {
884 /* could not convert seek format to time offset */
887 GST_INFO ("Finished conversion of stop: %" G_GINT64_FORMAT, *dst_stop);
892 /* convert a pair of values on the srcpad to a pair of
893 * values on the sinkpad
896 gst_dvdemux_convert_src_to_sink (GstDVDemux * dvdemux, GstPad * pad,
897 GstFormat src_format, gint64 src_start, gint64 src_stop,
898 GstFormat dst_format, gint64 * dst_start, gint64 * dst_stop)
903 conv = GST_FORMAT_TIME;
904 /* convert to TIME intermediate format */
905 if (!(res = gst_dvdemux_convert_src_pair (dvdemux, pad,
906 src_format, src_start, src_stop, conv, dst_start, dst_stop))) {
907 /* could not convert format to time offset */
910 /* convert to dst format on sinkpad */
911 if (!(res = gst_dvdemux_convert_sink_pair (dvdemux,
912 conv, *dst_start, *dst_stop, dst_format, dst_start, dst_stop))) {
913 /* could not convert format to time offset */
922 gst_dvdemux_convert_segment (GstDVDemux * dvdemux, GstSegment * src,
925 dest->rate = src->rate;
926 dest->abs_rate = src->abs_rate;
927 dest->flags = src->flags;
933 /* handle seek in push base mode.
935 * Convert the time seek to a bytes seek and send it
937 * Does not take ownership of the event.
940 gst_dvdemux_handle_push_seek (GstDVDemux * dvdemux, GstPad * pad,
943 gboolean res = FALSE;
947 GstSeekType cur_type, stop_type;
949 gint64 start_position, end_position;
952 gst_event_parse_seek (event, &rate, &format, &flags,
953 &cur_type, &cur, &stop_type, &stop);
955 /* First try if upstream can handle time based seeks */
956 if (format == GST_FORMAT_TIME)
957 res = gst_pad_push_event (dvdemux->sinkpad, gst_event_ref (event));
960 /* we convert the start/stop on the srcpad to the byte format
961 * on the sinkpad and forward the event */
962 res = gst_dvdemux_convert_src_to_sink (dvdemux, pad,
963 format, cur, stop, GST_FORMAT_BYTES, &start_position, &end_position);
967 /* now this is the updated seek event on bytes */
968 newevent = gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
969 cur_type, start_position, stop_type, end_position);
970 gst_event_set_seqnum (newevent, gst_event_get_seqnum (event));
972 res = gst_pad_push_event (dvdemux->sinkpad, newevent);
979 gst_dvdemux_update_frame_offsets (GstDVDemux * dvdemux, GstClockTime timestamp)
981 /* calculate current frame number */
982 gst_dvdemux_src_convert (dvdemux, dvdemux->videosrcpad,
983 dvdemux->time_segment.format, timestamp,
984 GST_FORMAT_DEFAULT, &dvdemux->video_offset);
986 /* calculate current audio number */
987 gst_dvdemux_src_convert (dvdemux, dvdemux->audiosrcpad,
988 dvdemux->time_segment.format, timestamp,
989 GST_FORMAT_DEFAULT, &dvdemux->audio_offset);
991 /* every DV frame corresponts with one video frame */
992 dvdemux->frame_offset = dvdemux->video_offset;
995 /* position ourselves to the configured segment, used in pull mode.
996 * The input segment is in TIME format. We convert the time values
997 * to bytes values into our byte_segment which we use to pull data from
1001 gst_dvdemux_do_seek (GstDVDemux * demux, GstSegment * segment)
1006 /* position to value configured is last_stop, this will round down
1007 * to the byte position where the frame containing the given
1008 * timestamp can be found. */
1009 format = GST_FORMAT_BYTES;
1010 res = gst_dvdemux_sink_convert (demux,
1011 segment->format, segment->position,
1012 format, (gint64 *) & demux->byte_segment.position);
1016 /* update byte segment start */
1017 gst_dvdemux_sink_convert (demux,
1018 segment->format, segment->start, format,
1019 (gint64 *) & demux->byte_segment.start);
1021 /* update byte segment stop */
1022 gst_dvdemux_sink_convert (demux,
1023 segment->format, segment->stop, format,
1024 (gint64 *) & demux->byte_segment.stop);
1026 /* update byte segment time */
1027 gst_dvdemux_sink_convert (demux,
1028 segment->format, segment->time, format,
1029 (gint64 *) & demux->byte_segment.time);
1031 gst_dvdemux_update_frame_offsets (demux, segment->start);
1033 demux->discont = TRUE;
1039 /* handle seek in pull base mode.
1041 * Does not take ownership of the event.
1044 gst_dvdemux_handle_pull_seek (GstDVDemux * demux, GstPad * pad,
1051 GstSeekType cur_type, stop_type;
1055 GstSegment seeksegment;
1056 GstEvent *new_event;
1058 GST_DEBUG_OBJECT (demux, "doing seek");
1060 /* first bring the event format to TIME, our native format
1061 * to perform the seek on */
1065 gst_event_parse_seek (event, &rate, &format, &flags,
1066 &cur_type, &cur, &stop_type, &stop);
1068 /* can't seek backwards yet */
1072 /* convert input format to TIME */
1073 conv = GST_FORMAT_TIME;
1074 if (!(gst_dvdemux_convert_src_pair (demux, pad,
1075 format, cur, stop, conv, &cur, &stop)))
1078 format = GST_FORMAT_TIME;
1083 demux->segment_seqnum = gst_event_get_seqnum (event);
1085 flush = flags & GST_SEEK_FLAG_FLUSH;
1087 /* send flush start */
1089 new_event = gst_event_new_flush_start ();
1090 gst_event_set_seqnum (new_event, demux->segment_seqnum);
1091 gst_dvdemux_push_event (demux, new_event);
1093 gst_pad_pause_task (demux->sinkpad);
1096 /* grab streaming lock, this should eventually be possible, either
1097 * because the task is paused or our streaming thread stopped
1098 * because our peer is flushing. */
1099 GST_PAD_STREAM_LOCK (demux->sinkpad);
1101 /* make copy into temp structure, we can only update the main one
1102 * when the subclass actually could to the seek. */
1103 memcpy (&seeksegment, &demux->time_segment, sizeof (GstSegment));
1105 /* now configure the seek segment */
1107 gst_segment_do_seek (&seeksegment, rate, format, flags,
1108 cur_type, cur, stop_type, stop, &update);
1111 GST_DEBUG_OBJECT (demux, "segment configured from %" G_GINT64_FORMAT
1112 " to %" G_GINT64_FORMAT ", position %" G_GINT64_FORMAT,
1113 seeksegment.start, seeksegment.stop, seeksegment.position);
1115 /* do the seek, segment.position contains new position. */
1116 res = gst_dvdemux_do_seek (demux, &seeksegment);
1118 /* and prepare to continue streaming */
1120 /* send flush stop, peer will accept data and events again. We
1121 * are not yet providing data as we still have the STREAM_LOCK. */
1122 new_event = gst_event_new_flush_stop (TRUE);
1123 gst_event_set_seqnum (new_event, demux->segment_seqnum);
1124 gst_dvdemux_push_event (demux, new_event);
1127 /* if successfull seek, we update our real segment and push
1128 * out the new segment. */
1130 memcpy (&demux->time_segment, &seeksegment, sizeof (GstSegment));
1132 if (demux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1133 GstMessage *message;
1135 message = gst_message_new_segment_start (GST_OBJECT_CAST (demux),
1136 demux->time_segment.format, demux->time_segment.position);
1137 gst_message_set_seqnum (message, demux->segment_seqnum);
1138 gst_element_post_message (GST_ELEMENT_CAST (demux), message);
1140 if ((stop = demux->time_segment.stop) == -1)
1141 stop = demux->time_segment.duration;
1143 GST_INFO_OBJECT (demux,
1144 "Saving newsegment event to be sent in streaming thread");
1146 if (demux->pending_segment)
1147 gst_event_unref (demux->pending_segment);
1149 demux->pending_segment = gst_event_new_segment (&demux->time_segment);
1150 gst_event_set_seqnum (demux->pending_segment, demux->segment_seqnum);
1152 demux->need_segment = FALSE;
1155 /* and restart the task in case it got paused explicitely or by
1156 * the FLUSH_START event we pushed out. */
1157 gst_pad_start_task (demux->sinkpad, (GstTaskFunction) gst_dvdemux_loop,
1158 demux->sinkpad, NULL);
1160 /* and release the lock again so we can continue streaming */
1161 GST_PAD_STREAM_UNLOCK (demux->sinkpad);
1168 GST_DEBUG_OBJECT (demux, "negative playback rate %lf not supported.", rate);
1173 GST_DEBUG_OBJECT (demux, "cannot convert to TIME format, seek aborted.");
1179 gst_dvdemux_send_event (GstElement * element, GstEvent * event)
1181 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1182 gboolean res = FALSE;
1184 switch (GST_EVENT_TYPE (event)) {
1185 case GST_EVENT_SEEK:
1187 /* checking header and configuring the seek must be atomic */
1188 GST_OBJECT_LOCK (dvdemux);
1189 if (g_atomic_int_get (&dvdemux->found_header) == 0) {
1192 event_p = &dvdemux->seek_event;
1194 /* We don't have pads yet. Keep the event. */
1195 GST_INFO_OBJECT (dvdemux, "Keeping the seek event for later");
1197 gst_event_replace (event_p, event);
1198 GST_OBJECT_UNLOCK (dvdemux);
1202 GST_OBJECT_UNLOCK (dvdemux);
1204 if (dvdemux->seek_handler)
1205 res = dvdemux->seek_handler (dvdemux, dvdemux->videosrcpad, event);
1206 gst_event_unref (event);
1211 res = GST_ELEMENT_CLASS (parent_class)->send_event (element, event);
1218 /* handle an event on the source pad, it's most likely a seek */
1220 gst_dvdemux_handle_src_event (GstPad * pad, GstObject * parent,
1223 gboolean res = FALSE;
1224 GstDVDemux *dvdemux;
1226 dvdemux = GST_DVDEMUX (parent);
1228 switch (GST_EVENT_TYPE (event)) {
1229 case GST_EVENT_SEEK:
1230 /* seek handler is installed based on scheduling mode */
1231 if (dvdemux->seek_handler)
1232 res = dvdemux->seek_handler (dvdemux, pad, event);
1233 gst_event_unref (event);
1236 res = gst_pad_push_event (dvdemux->sinkpad, event);
1243 /* does not take ownership of buffer */
1244 static GstFlowReturn
1245 gst_dvdemux_demux_audio (GstDVDemux * dvdemux, GstBuffer * buffer,
1252 gst_buffer_map (buffer, &map, GST_MAP_READ);
1253 dv_decode_full_audio (dvdemux->decoder, map.data, dvdemux->audio_buffers);
1254 gst_buffer_unmap (buffer, &map);
1256 if (G_LIKELY ((num_samples = dv_get_num_samples (dvdemux->decoder)) > 0)) {
1260 gint frequency, channels;
1262 /* get initial format or check if format changed */
1263 frequency = dv_get_frequency (dvdemux->decoder);
1264 channels = dv_get_num_channels (dvdemux->decoder);
1266 if (G_UNLIKELY ((dvdemux->audiosrcpad == NULL)
1267 || (frequency != dvdemux->frequency)
1268 || (channels != dvdemux->channels))) {
1272 dvdemux->frequency = frequency;
1273 dvdemux->channels = channels;
1275 gst_audio_info_init (&info);
1276 gst_audio_info_set_format (&info, GST_AUDIO_FORMAT_S16LE,
1277 frequency, channels, NULL);
1278 caps = gst_audio_info_to_caps (&info);
1279 if (G_UNLIKELY (dvdemux->audiosrcpad == NULL)) {
1280 dvdemux->audiosrcpad =
1281 gst_dvdemux_add_pad (dvdemux, &audio_src_temp, caps);
1283 gst_pad_set_caps (dvdemux->audiosrcpad, caps);
1285 gst_caps_unref (caps);
1288 outbuf = gst_buffer_new_and_alloc (num_samples *
1289 sizeof (gint16) * dvdemux->channels);
1291 gst_buffer_map (outbuf, &map, GST_MAP_WRITE);
1292 a_ptr = (gint16 *) map.data;
1294 for (i = 0; i < num_samples; i++) {
1295 for (j = 0; j < dvdemux->channels; j++) {
1296 *(a_ptr++) = dvdemux->audio_buffers[j][i];
1299 gst_buffer_unmap (outbuf, &map);
1301 GST_DEBUG ("pushing audio %" GST_TIME_FORMAT,
1302 GST_TIME_ARGS (dvdemux->time_segment.position));
1304 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.position;
1305 GST_BUFFER_DURATION (outbuf) = duration;
1306 GST_BUFFER_OFFSET (outbuf) = dvdemux->audio_offset;
1307 dvdemux->audio_offset += num_samples;
1308 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->audio_offset;
1310 if (dvdemux->new_media || dvdemux->discont)
1311 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1313 ret = gst_pad_push (dvdemux->audiosrcpad, outbuf);
1322 /* takes ownership of buffer */
1323 static GstFlowReturn
1324 gst_dvdemux_demux_video (GstDVDemux * dvdemux, GstBuffer * buffer,
1330 GstFlowReturn ret = GST_FLOW_OK;
1333 /* framerate is already up-to-date */
1334 height = dvdemux->decoder->height;
1335 wide = dv_format_wide (dvdemux->decoder);
1337 /* see if anything changed */
1338 if (G_UNLIKELY ((dvdemux->videosrcpad == NULL) || (dvdemux->height != height)
1339 || dvdemux->wide != wide)) {
1343 dvdemux->height = height;
1344 dvdemux->wide = wide;
1346 if (dvdemux->decoder->system == e_dv_system_625_50) {
1348 par_x = PAL_WIDE_PAR_X;
1349 par_y = PAL_WIDE_PAR_Y;
1351 par_x = PAL_NORMAL_PAR_X;
1352 par_y = PAL_NORMAL_PAR_Y;
1356 par_x = NTSC_WIDE_PAR_X;
1357 par_y = NTSC_WIDE_PAR_Y;
1359 par_x = NTSC_NORMAL_PAR_X;
1360 par_y = NTSC_NORMAL_PAR_Y;
1364 caps = gst_caps_new_simple ("video/x-dv",
1365 "systemstream", G_TYPE_BOOLEAN, FALSE,
1366 "width", G_TYPE_INT, 720,
1367 "height", G_TYPE_INT, height,
1368 "framerate", GST_TYPE_FRACTION, dvdemux->framerate_numerator,
1369 dvdemux->framerate_denominator,
1370 "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
1372 if (G_UNLIKELY (dvdemux->videosrcpad == NULL)) {
1373 dvdemux->videosrcpad =
1374 gst_dvdemux_add_pad (dvdemux, &video_src_temp, caps);
1376 gst_pad_set_caps (dvdemux->videosrcpad, caps);
1378 gst_caps_unref (caps);
1381 /* takes ownership of buffer here, we just need to modify
1383 outbuf = gst_buffer_make_writable (buffer);
1385 GST_BUFFER_TIMESTAMP (outbuf) = dvdemux->time_segment.position;
1386 GST_BUFFER_OFFSET (outbuf) = dvdemux->video_offset;
1387 GST_BUFFER_OFFSET_END (outbuf) = dvdemux->video_offset + 1;
1388 GST_BUFFER_DURATION (outbuf) = duration;
1390 if (dvdemux->new_media || dvdemux->discont)
1391 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
1393 GST_DEBUG ("pushing video %" GST_TIME_FORMAT,
1394 GST_TIME_ARGS (dvdemux->time_segment.position));
1396 ret = gst_pad_push (dvdemux->videosrcpad, outbuf);
1398 dvdemux->video_offset++;
1404 get_ssyb_offset (int dif, int ssyb)
1408 offset = dif * 12000; /* to dif */
1409 offset += 80 * (1 + (ssyb / 6)); /* to subcode pack */
1410 offset += 3; /* past header */
1411 offset += 8 * (ssyb % 6); /* to ssyb */
1417 gst_dvdemux_get_timecode (GstDVDemux * dvdemux, GstBuffer * buffer,
1418 GstSMPTETimeCode * timecode)
1424 int n_difs = dvdemux->decoder->num_dif_seqs;
1426 gst_buffer_map (buffer, &map, GST_MAP_READ);
1428 for (dif = 0; dif < n_difs; dif++) {
1429 offset = get_ssyb_offset (dif, 3);
1430 if (data[offset + 3] == 0x13) {
1431 timecode->frames = ((data[offset + 4] >> 4) & 0x3) * 10 +
1432 (data[offset + 4] & 0xf);
1433 timecode->seconds = ((data[offset + 5] >> 4) & 0x3) * 10 +
1434 (data[offset + 5] & 0xf);
1435 timecode->minutes = ((data[offset + 6] >> 4) & 0x3) * 10 +
1436 (data[offset + 6] & 0xf);
1437 timecode->hours = ((data[offset + 7] >> 4) & 0x3) * 10 +
1438 (data[offset + 7] & 0xf);
1439 GST_DEBUG ("got timecode %" GST_SMPTE_TIME_CODE_FORMAT,
1440 GST_SMPTE_TIME_CODE_ARGS (timecode));
1441 gst_buffer_unmap (buffer, &map);
1446 gst_buffer_unmap (buffer, &map);
1451 gst_dvdemux_is_new_media (GstDVDemux * dvdemux, GstBuffer * buffer)
1459 n_difs = dvdemux->decoder->num_dif_seqs;
1461 gst_buffer_map (buffer, &map, GST_MAP_READ);
1463 for (dif = 0; dif < n_difs; dif++) {
1465 aaux_offset = (dif * 12000) + (6 + 16 * 1) * 80 + 3;
1467 aaux_offset = (dif * 12000) + (6 + 16 * 4) * 80 + 3;
1469 if (data[aaux_offset + 0] == 0x51) {
1470 if ((data[aaux_offset + 2] & 0x80) == 0) {
1471 gst_buffer_unmap (buffer, &map);
1477 gst_buffer_unmap (buffer, &map);
1481 /* takes ownership of buffer */
1482 static GstFlowReturn
1483 gst_dvdemux_demux_frame (GstDVDemux * dvdemux, GstBuffer * buffer)
1485 GstClockTime next_ts;
1486 GstFlowReturn aret, vret, ret;
1489 GstSMPTETimeCode timecode;
1492 if (dvdemux->need_segment) {
1496 g_assert (!dvdemux->upstream_time_segment);
1498 /* convert to time and store as start/end_timestamp */
1499 format = GST_FORMAT_TIME;
1500 if (!(gst_dvdemux_convert_sink_pair (dvdemux,
1501 GST_FORMAT_BYTES, dvdemux->byte_segment.start,
1502 dvdemux->byte_segment.stop, format,
1503 (gint64 *) & dvdemux->time_segment.start,
1504 (gint64 *) & dvdemux->time_segment.stop)))
1507 dvdemux->time_segment.time = dvdemux->time_segment.start;
1508 dvdemux->time_segment.rate = dvdemux->byte_segment.rate;
1510 gst_dvdemux_sink_convert (dvdemux,
1511 GST_FORMAT_BYTES, dvdemux->byte_segment.position,
1512 GST_FORMAT_TIME, (gint64 *) & dvdemux->time_segment.position);
1514 gst_dvdemux_update_frame_offsets (dvdemux, dvdemux->time_segment.position);
1516 GST_DEBUG_OBJECT (dvdemux, "sending segment start: %" GST_TIME_FORMAT
1517 ", stop: %" GST_TIME_FORMAT ", time: %" GST_TIME_FORMAT,
1518 GST_TIME_ARGS (dvdemux->time_segment.start),
1519 GST_TIME_ARGS (dvdemux->time_segment.stop),
1520 GST_TIME_ARGS (dvdemux->time_segment.start));
1522 event = gst_event_new_segment (&dvdemux->time_segment);
1523 if (dvdemux->segment_seqnum)
1524 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1525 gst_dvdemux_push_event (dvdemux, event);
1527 dvdemux->need_segment = FALSE;
1530 gst_dvdemux_get_timecode (dvdemux, buffer, &timecode);
1531 gst_smpte_time_code_get_frame_number (
1532 (dvdemux->decoder->system == e_dv_system_625_50) ?
1533 GST_SMPTE_TIME_CODE_SYSTEM_25 : GST_SMPTE_TIME_CODE_SYSTEM_30,
1534 &frame_number, &timecode);
1536 next_ts = gst_util_uint64_scale_int (
1537 (dvdemux->frame_offset + 1) * GST_SECOND,
1538 dvdemux->framerate_denominator, dvdemux->framerate_numerator);
1539 duration = next_ts - dvdemux->time_segment.position;
1541 gst_buffer_map (buffer, &map, GST_MAP_READ);
1542 dv_parse_packs (dvdemux->decoder, map.data);
1543 gst_buffer_unmap (buffer, &map);
1544 dvdemux->new_media = FALSE;
1545 if (gst_dvdemux_is_new_media (dvdemux, buffer) &&
1546 dvdemux->frames_since_new_media > 2) {
1547 dvdemux->new_media = TRUE;
1548 dvdemux->frames_since_new_media = 0;
1550 dvdemux->frames_since_new_media++;
1552 /* does not take ownership of buffer */
1553 aret = ret = gst_dvdemux_demux_audio (dvdemux, buffer, duration);
1554 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED)) {
1555 gst_buffer_unref (buffer);
1559 /* takes ownership of buffer */
1560 vret = ret = gst_dvdemux_demux_video (dvdemux, buffer, duration);
1561 if (G_UNLIKELY (ret != GST_FLOW_OK && ret != GST_FLOW_NOT_LINKED))
1564 /* if both are not linked, we stop */
1565 if (G_UNLIKELY (aret == GST_FLOW_NOT_LINKED && vret == GST_FLOW_NOT_LINKED)) {
1566 ret = GST_FLOW_NOT_LINKED;
1570 dvdemux->discont = FALSE;
1571 dvdemux->time_segment.position = next_ts;
1572 dvdemux->frame_offset++;
1574 /* check for the end of the segment */
1575 if (dvdemux->time_segment.stop != -1 && next_ts > dvdemux->time_segment.stop)
1586 GST_DEBUG ("error generating new_segment event");
1587 gst_buffer_unref (buffer);
1588 return GST_FLOW_ERROR;
1592 /* flush any remaining data in the adapter, used in chain based scheduling mode */
1593 static GstFlowReturn
1594 gst_dvdemux_flush (GstDVDemux * dvdemux)
1596 GstFlowReturn ret = GST_FLOW_OK;
1598 while (gst_adapter_available (dvdemux->adapter) >= dvdemux->frame_len) {
1602 /* get the accumulated bytes */
1603 data = gst_adapter_map (dvdemux->adapter, dvdemux->frame_len);
1605 /* parse header to know the length and other params */
1606 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, data) < 0)) {
1607 gst_adapter_unmap (dvdemux->adapter);
1608 goto parse_header_error;
1610 gst_adapter_unmap (dvdemux->adapter);
1612 /* after parsing the header we know the length of the data */
1613 length = dvdemux->frame_len = dvdemux->decoder->frame_size;
1614 if (dvdemux->decoder->system == e_dv_system_625_50) {
1615 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1616 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1618 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1619 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1621 g_atomic_int_set (&dvdemux->found_header, 1);
1623 /* let demux_video set the height, it needs to detect when things change so
1624 * it can reset caps */
1626 /* if we still have enough for a frame, start decoding */
1627 if (G_LIKELY (gst_adapter_available (dvdemux->adapter) >= length)) {
1630 buffer = gst_adapter_take_buffer (dvdemux->adapter, length);
1632 /* and decode the buffer, takes ownership */
1633 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1634 if (G_UNLIKELY (ret != GST_FLOW_OK))
1644 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1645 (NULL), ("Error parsing DV header"));
1646 return GST_FLOW_ERROR;
1650 /* streaming operation:
1652 * accumulate data until we have a frame, then decode.
1654 static GstFlowReturn
1655 gst_dvdemux_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
1657 GstDVDemux *dvdemux;
1659 GstClockTime timestamp;
1661 dvdemux = GST_DVDEMUX (parent);
1663 /* a discontinuity in the stream, we need to get rid of
1664 * accumulated data in the adapter and assume a new frame
1665 * starts after the discontinuity */
1666 if (G_UNLIKELY (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT))) {
1667 gst_adapter_clear (dvdemux->adapter);
1668 dvdemux->discont = TRUE;
1670 /* Should recheck where we are */
1671 if (!dvdemux->upstream_time_segment)
1672 dvdemux->need_segment = TRUE;
1675 /* a timestamp always should be respected */
1676 timestamp = GST_BUFFER_TIMESTAMP (buffer);
1677 if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
1678 dvdemux->time_segment.position = timestamp;
1680 if (dvdemux->discont)
1681 gst_dvdemux_update_frame_offsets (dvdemux,
1682 dvdemux->time_segment.position);
1683 } else if (dvdemux->upstream_time_segment && dvdemux->discont) {
1684 /* This will probably fail later to provide correct
1685 * timestamps and/or durations but also should not happen */
1686 GST_ERROR_OBJECT (dvdemux,
1687 "Upstream provides TIME segment but no PTS after discont");
1690 gst_adapter_push (dvdemux->adapter, buffer);
1692 /* Apparently dv_parse_header can read from the body of the frame
1693 * too, so it needs more than header_size bytes. Wacky!
1695 if (G_UNLIKELY (dvdemux->frame_len == -1)) {
1696 /* if we don't know the length of a frame, we assume it is
1697 * the NTSC_BUFFER length, as this is enough to figure out
1698 * if this is PAL or NTSC */
1699 dvdemux->frame_len = NTSC_BUFFER;
1702 /* and try to flush pending frames */
1703 ret = gst_dvdemux_flush (dvdemux);
1708 /* pull based operation.
1710 * Read header first to figure out the frame size. Then read
1711 * and decode full frames.
1714 gst_dvdemux_loop (GstPad * pad)
1717 GstDVDemux *dvdemux;
1718 GstBuffer *buffer = NULL;
1721 dvdemux = GST_DVDEMUX (gst_pad_get_parent (pad));
1723 if (G_UNLIKELY (g_atomic_int_get (&dvdemux->found_header) == 0)) {
1724 GST_DEBUG_OBJECT (dvdemux, "pulling first buffer");
1725 /* pull in NTSC sized buffer to figure out the frame
1727 ret = gst_pad_pull_range (dvdemux->sinkpad,
1728 dvdemux->byte_segment.position, NTSC_BUFFER, &buffer);
1729 if (G_UNLIKELY (ret != GST_FLOW_OK))
1732 /* check buffer size, don't want to read small buffers */
1733 if (G_UNLIKELY (gst_buffer_get_size (buffer) < NTSC_BUFFER))
1736 gst_buffer_map (buffer, &map, GST_MAP_READ);
1737 /* parse header to know the length and other params */
1738 if (G_UNLIKELY (dv_parse_header (dvdemux->decoder, map.data) < 0)) {
1739 gst_buffer_unmap (buffer, &map);
1740 goto parse_header_error;
1742 gst_buffer_unmap (buffer, &map);
1744 /* after parsing the header we know the length of the data */
1745 dvdemux->frame_len = dvdemux->decoder->frame_size;
1746 if (dvdemux->decoder->system == e_dv_system_625_50) {
1747 dvdemux->framerate_numerator = PAL_FRAMERATE_NUMERATOR;
1748 dvdemux->framerate_denominator = PAL_FRAMERATE_DENOMINATOR;
1750 dvdemux->framerate_numerator = NTSC_FRAMERATE_NUMERATOR;
1751 dvdemux->framerate_denominator = NTSC_FRAMERATE_DENOMINATOR;
1753 dvdemux->need_segment = TRUE;
1755 /* see if we need to read a larger part */
1756 if (dvdemux->frame_len != NTSC_BUFFER) {
1757 gst_buffer_unref (buffer);
1764 /* setting header and prrforming the seek must be atomic */
1765 GST_OBJECT_LOCK (dvdemux);
1766 /* got header now */
1767 g_atomic_int_set (&dvdemux->found_header, 1);
1769 /* now perform pending seek if any. */
1770 event = dvdemux->seek_event;
1772 gst_event_ref (event);
1773 GST_OBJECT_UNLOCK (dvdemux);
1776 if (!gst_dvdemux_handle_pull_seek (dvdemux, dvdemux->videosrcpad,
1778 GST_ELEMENT_WARNING (dvdemux, STREAM, DECODE, (NULL),
1779 ("Error perfoming initial seek"));
1781 gst_event_unref (event);
1783 /* and we need to pull a new buffer in all cases. */
1785 gst_buffer_unref (buffer);
1792 if (G_UNLIKELY (dvdemux->pending_segment)) {
1794 /* now send the newsegment */
1795 GST_DEBUG_OBJECT (dvdemux, "Sending newsegment from");
1797 gst_dvdemux_push_event (dvdemux, dvdemux->pending_segment);
1798 dvdemux->pending_segment = NULL;
1801 if (G_LIKELY (buffer == NULL)) {
1802 GST_DEBUG_OBJECT (dvdemux, "pulling buffer at offset %" G_GINT64_FORMAT,
1803 dvdemux->byte_segment.position);
1805 ret = gst_pad_pull_range (dvdemux->sinkpad,
1806 dvdemux->byte_segment.position, dvdemux->frame_len, &buffer);
1807 if (ret != GST_FLOW_OK)
1810 /* check buffer size, don't want to read small buffers */
1811 if (gst_buffer_get_size (buffer) < dvdemux->frame_len)
1814 /* and decode the buffer */
1815 ret = gst_dvdemux_demux_frame (dvdemux, buffer);
1816 if (G_UNLIKELY (ret != GST_FLOW_OK))
1819 /* and position ourselves for the next buffer */
1820 dvdemux->byte_segment.position += dvdemux->frame_len;
1823 gst_object_unref (dvdemux);
1832 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1833 (NULL), ("Error parsing DV header"));
1834 gst_buffer_unref (buffer);
1835 gst_pad_pause_task (dvdemux->sinkpad);
1836 event = gst_event_new_eos ();
1837 if (dvdemux->segment_seqnum)
1838 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1839 gst_dvdemux_push_event (dvdemux, event);
1846 GST_ELEMENT_ERROR (dvdemux, STREAM, DECODE,
1847 (NULL), ("Error reading buffer"));
1848 gst_buffer_unref (buffer);
1849 gst_pad_pause_task (dvdemux->sinkpad);
1850 event = gst_event_new_eos ();
1851 if (dvdemux->segment_seqnum)
1852 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1853 gst_dvdemux_push_event (dvdemux, event);
1858 GST_INFO_OBJECT (dvdemux, "pausing task, %s", gst_flow_get_name (ret));
1859 gst_pad_pause_task (dvdemux->sinkpad);
1860 if (ret == GST_FLOW_EOS) {
1861 GST_LOG_OBJECT (dvdemux, "got eos");
1862 /* so align our position with the end of it, if there is one
1863 * this ensures a subsequent will arrive at correct base/acc time */
1864 if (dvdemux->time_segment.rate > 0.0 &&
1865 GST_CLOCK_TIME_IS_VALID (dvdemux->time_segment.stop))
1866 dvdemux->time_segment.position = dvdemux->time_segment.stop;
1867 else if (dvdemux->time_segment.rate < 0.0)
1868 dvdemux->time_segment.position = dvdemux->time_segment.start;
1869 /* perform EOS logic */
1870 if (dvdemux->time_segment.flags & GST_SEEK_FLAG_SEGMENT) {
1871 GstMessage *message;
1874 event = gst_event_new_segment_done (dvdemux->time_segment.format,
1875 dvdemux->time_segment.position);
1876 if (dvdemux->segment_seqnum)
1877 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1879 message = gst_message_new_segment_done (GST_OBJECT_CAST (dvdemux),
1880 dvdemux->time_segment.format, dvdemux->time_segment.position);
1881 if (dvdemux->segment_seqnum)
1882 gst_message_set_seqnum (message, dvdemux->segment_seqnum);
1884 gst_element_post_message (GST_ELEMENT (dvdemux), message);
1885 gst_dvdemux_push_event (dvdemux, event);
1887 GstEvent *event = gst_event_new_eos ();
1888 if (dvdemux->segment_seqnum)
1889 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1890 gst_dvdemux_push_event (dvdemux, event);
1892 } else if (ret == GST_FLOW_NOT_LINKED || ret < GST_FLOW_EOS) {
1893 GstEvent *event = gst_event_new_eos ();
1894 /* for fatal errors or not-linked we post an error message */
1895 GST_ELEMENT_FLOW_ERROR (dvdemux, ret);
1896 if (dvdemux->segment_seqnum)
1897 gst_event_set_seqnum (event, dvdemux->segment_seqnum);
1898 gst_dvdemux_push_event (dvdemux, event);
1905 gst_dvdemux_sink_activate_mode (GstPad * sinkpad, GstObject * parent,
1906 GstPadMode mode, gboolean active)
1909 GstDVDemux *demux = GST_DVDEMUX (parent);
1912 case GST_PAD_MODE_PULL:
1914 demux->seek_handler = gst_dvdemux_handle_pull_seek;
1915 res = gst_pad_start_task (sinkpad,
1916 (GstTaskFunction) gst_dvdemux_loop, sinkpad, NULL);
1918 demux->seek_handler = NULL;
1919 res = gst_pad_stop_task (sinkpad);
1922 case GST_PAD_MODE_PUSH:
1924 GST_DEBUG_OBJECT (demux, "activating push/chain function");
1925 demux->seek_handler = gst_dvdemux_handle_push_seek;
1927 GST_DEBUG_OBJECT (demux, "deactivating push/chain function");
1928 demux->seek_handler = NULL;
1939 /* decide on push or pull based scheduling */
1941 gst_dvdemux_sink_activate (GstPad * sinkpad, GstObject * parent)
1946 query = gst_query_new_scheduling ();
1948 if (!gst_pad_peer_query (sinkpad, query)) {
1949 gst_query_unref (query);
1953 pull_mode = gst_query_has_scheduling_mode_with_flags (query,
1954 GST_PAD_MODE_PULL, GST_SCHEDULING_FLAG_SEEKABLE);
1955 gst_query_unref (query);
1960 GST_DEBUG_OBJECT (sinkpad, "activating pull");
1961 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PULL, TRUE);
1965 GST_DEBUG_OBJECT (sinkpad, "activating push");
1966 return gst_pad_activate_mode (sinkpad, GST_PAD_MODE_PUSH, TRUE);
1970 static GstStateChangeReturn
1971 gst_dvdemux_change_state (GstElement * element, GstStateChange transition)
1973 GstDVDemux *dvdemux = GST_DVDEMUX (element);
1974 GstStateChangeReturn ret;
1976 switch (transition) {
1977 case GST_STATE_CHANGE_NULL_TO_READY:
1979 case GST_STATE_CHANGE_READY_TO_PAUSED:
1980 dvdemux->decoder = dv_decoder_new (0, FALSE, FALSE);
1981 dv_set_error_log (dvdemux->decoder, NULL);
1982 gst_dvdemux_reset (dvdemux);
1984 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1990 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1992 switch (transition) {
1993 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1995 case GST_STATE_CHANGE_PAUSED_TO_READY:
1996 gst_adapter_clear (dvdemux->adapter);
1997 dv_decoder_free (dvdemux->decoder);
1998 dvdemux->decoder = NULL;
2000 gst_dvdemux_remove_pads (dvdemux);
2002 case GST_STATE_CHANGE_READY_TO_NULL:
2006 event_p = &dvdemux->seek_event;
2007 gst_event_replace (event_p, NULL);
2008 if (dvdemux->pending_segment)
2009 gst_event_unref (dvdemux->pending_segment);
2010 dvdemux->pending_segment = NULL;