2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
25 /* First, include the header file for the plugin, to bring in the
26 * object definition and other useful things.
30 #define NTSC_HEIGHT 480
31 #define NTSC_BUFFER 120000
32 #define NTSC_FRAMERATE 29.997
34 #define PAL_HEIGHT 576
35 #define PAL_BUFFER 144000
36 #define PAL_FRAMERATE 25.0
38 #define PAL_NORMAL_PAR_X 16
39 #define PAL_NORMAL_PAR_Y 15
40 #define PAL_WIDE_PAR_X 64
41 #define PAL_WIDE_PAR_Y 45
43 #define NTSC_NORMAL_PAR_X 80
44 #define NTSC_NORMAL_PAR_Y 89
45 #define NTSC_WIDE_PAR_X 320
46 #define NTSC_WIDE_PAR_Y 267
48 /* The ElementDetails structure gives a human-readable description
49 * of the plugin, as well as author and version data.
51 static GstElementDetails dvdec_details =
52 GST_ELEMENT_DETAILS ("DV (smpte314) decoder plugin",
53 "Codec/Decoder/Video",
54 "Uses libdv to decode DV video (libdv.sourceforge.net)",
55 "Erik Walthinsen <omega@cse.ogi.edu>\n" "Wim Taymans <wim.taymans@tvd.be>");
58 /* These are the signals that this element can fire. They are zero-
59 * based because the numbers themselves are private to the object.
60 * LAST_SIGNAL is used for initialization of the signal array.
68 #define DV_DEFAULT_QUALITY DV_QUALITY_BEST
69 #define DV_DEFAULT_DECODE_NTH 1
71 /* Arguments are identified the same way, but cannot be zero, so you
72 * must leave the ARG_0 entry in as a placeholder.
84 const gint qualities[] = {
88 DV_QUALITY_DC | DV_QUALITY_COLOR,
89 DV_QUALITY_AC_1 | DV_QUALITY_COLOR,
90 DV_QUALITY_AC_2 | DV_QUALITY_COLOR
93 /* The PadFactory structures describe what pads the element has or
94 * can have. They can be quite complex, but for this dvdec plugin
95 * they are rather simple.
97 static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
100 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true")
103 static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video",
106 GST_STATIC_CAPS ("video/x-raw-yuv, "
107 "format = (fourcc) YUY2, "
108 "width = (int) 720, "
110 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
112 "pixel-aspect-ratio=(fraction) { "
113 G_STRINGIFY (PAL_NORMAL_PAR_X) "/" G_STRINGIFY (PAL_NORMAL_PAR_Y) ","
114 G_STRINGIFY (PAL_WIDE_PAR_X) "/" G_STRINGIFY (PAL_WIDE_PAR_Y) ","
115 G_STRINGIFY (NTSC_NORMAL_PAR_X) "/" G_STRINGIFY (NTSC_NORMAL_PAR_Y) ","
116 G_STRINGIFY (NTSC_WIDE_PAR_X) "/" G_STRINGIFY (NTSC_WIDE_PAR_Y) "},"
117 "framerate = (double) [ 1.0, 60.0 ];"
118 //"framerate = (double) { "
119 //G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
124 "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", "
125 "red_mask = (int) 0x00ff0000, "
126 "green_mask = (int) 0x0000ff00, "
127 "blue_mask = (int) 0x000000ff, "
128 "width = (int) 720, "
130 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
132 "pixel-aspect-ratio=(fraction) { "
133 G_STRINGIFY (PAL_NORMAL_PAR_X) "/" G_STRINGIFY (PAL_NORMAL_PAR_Y) ","
134 G_STRINGIFY (PAL_WIDE_PAR_X) "/" G_STRINGIFY (PAL_WIDE_PAR_Y) ","
135 G_STRINGIFY (NTSC_NORMAL_PAR_X) "/" G_STRINGIFY (NTSC_NORMAL_PAR_Y) ","
136 G_STRINGIFY (NTSC_WIDE_PAR_X) "/" G_STRINGIFY (NTSC_WIDE_PAR_Y) "},"
137 "framerate = (double) [ 1.0, 60.0 ];"
138 //"framerate = (double) { "
139 //G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
144 "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", "
145 "red_mask = (int) 0x00ff0000, "
146 "green_mask = (int) 0x0000ff00, "
147 "blue_mask = (int) 0x000000ff, "
148 "width = (int) 720, "
150 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
152 "pixel-aspect-ratio=(fraction) { "
153 G_STRINGIFY (PAL_NORMAL_PAR_X) "/" G_STRINGIFY (PAL_NORMAL_PAR_Y) ","
154 G_STRINGIFY (PAL_WIDE_PAR_X) "/" G_STRINGIFY (PAL_WIDE_PAR_Y) ","
155 G_STRINGIFY (NTSC_NORMAL_PAR_X) "/" G_STRINGIFY (NTSC_NORMAL_PAR_Y) ","
156 G_STRINGIFY (NTSC_WIDE_PAR_X) "/" G_STRINGIFY (NTSC_WIDE_PAR_Y) "},"
157 "framerate = (double) [ 1.0, 60.0 ]"
158 //"framerate = (double) { "
159 //G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
164 static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
167 GST_STATIC_CAPS ("audio/x-raw-int, "
170 "signed = (boolean) TRUE, "
171 "channels = (int) 2, "
172 "endianness = (int) " G_STRINGIFY (G_LITTLE_ENDIAN) ", "
173 "rate = (int) [ 4000, 48000 ]")
176 #define GST_TYPE_DVDEC_QUALITY (gst_dvdec_quality_get_type())
178 gst_dvdec_quality_get_type (void)
180 static GType qtype = 0;
183 static const GEnumValue values[] = {
184 {0, "DV_QUALITY_FASTEST", "Fastest decoding, low-quality mono"},
185 {1, "DV_QUALITY_AC_1", "Mono decoding using the first AC coefficient"},
186 {2, "DV_QUALITY_AC_2", "Highest quality mono decoding"},
187 {3, "DV_QUALITY_DC|DV_QUALITY_COLOUR", "Fastest colour decoding"},
188 {4, "DV_QUALITY_AC_1|DV_QUALITY_COLOUR",
189 "Colour, using only the first AC coefficient"},
190 {5, "DV_QUALITY_BEST", "Highest quality colour decoding"},
194 qtype = g_enum_register_static ("GstDVDecQualityEnum", values);
199 /* A number of functon prototypes are given so we can refer to them later. */
200 static void gst_dvdec_base_init (gpointer g_class);
201 static void gst_dvdec_class_init (GstDVDecClass * klass);
202 static void gst_dvdec_init (GstDVDec * dvdec);
204 static const GstQueryType *gst_dvdec_get_src_query_types (GstPad * pad);
205 static gboolean gst_dvdec_src_query (GstPad * pad, GstQueryType type,
206 GstFormat * format, gint64 * value);
207 static const GstFormat *gst_dvdec_get_formats (GstPad * pad);
208 static gboolean gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format,
209 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
210 static gboolean gst_dvdec_src_convert (GstPad * pad, GstFormat src_format,
211 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
213 static GstPadLinkReturn gst_dvdec_video_link (GstPad * pad,
214 const GstCaps * caps);
215 static GstCaps *gst_dvdec_video_getcaps (GstPad * pad);
217 static const GstEventMask *gst_dvdec_get_event_masks (GstPad * pad);
218 static gboolean gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event);
220 static void gst_dvdec_loop (GstElement * element);
222 static GstElementStateReturn gst_dvdec_change_state (GstElement * element);
224 static void gst_dvdec_set_property (GObject * object, guint prop_id,
225 const GValue * value, GParamSpec * pspec);
226 static void gst_dvdec_get_property (GObject * object, guint prop_id,
227 GValue * value, GParamSpec * pspec);
229 /* The parent class pointer needs to be kept around for some object
232 static GstElementClass *parent_class = NULL;
234 /* This array holds the ids of the signals registered for this object.
235 * The array indexes are based on the enum up above.
237 /*static guint gst_dvdec_signals[LAST_SIGNAL] = { 0 }; */
239 /* This function is used to register and subsequently return the type
240 * identifier for this object class. On first invocation, it will
241 * register the type, providing the name of the class, struct sizes,
242 * and pointers to the various functions that define the class.
245 gst_dvdec_get_type (void)
247 static GType dvdec_type = 0;
250 static const GTypeInfo dvdec_info = {
251 sizeof (GstDVDecClass),
254 (GClassInitFunc) gst_dvdec_class_init,
259 (GInstanceInitFunc) gst_dvdec_init,
263 g_type_register_static (GST_TYPE_ELEMENT, "GstDVDec", &dvdec_info, 0);
269 gst_dvdec_base_init (gpointer g_class)
271 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
273 /* The pad templates can be easily generated from the factories above,
274 * and then added to the list of padtemplates for the elementfactory.
275 * Note that the generated padtemplates are stored in static global
276 * variables, for the gst_dvdec_init function to use later on.
278 gst_element_class_add_pad_template (element_class,
279 gst_static_pad_template_get (&sink_temp));
280 gst_element_class_add_pad_template (element_class,
281 gst_static_pad_template_get (&video_src_temp));
282 gst_element_class_add_pad_template (element_class,
283 gst_static_pad_template_get (&audio_src_temp));
285 gst_element_class_set_details (element_class, &dvdec_details);
288 /* In order to create an instance of an object, the class must be
289 * initialized by this function. GObject will take care of running
290 * it, based on the pointer to the function provided above.
293 gst_dvdec_class_init (GstDVDecClass * klass)
295 /* Class pointers are needed to supply pointers to the private
296 * implementations of parent class methods.
298 GObjectClass *gobject_class;
299 GstElementClass *gstelement_class;
301 /* Since the dvdec class contains the parent classes, you can simply
302 * cast the pointer to get access to the parent classes.
304 gobject_class = (GObjectClass *) klass;
305 gstelement_class = (GstElementClass *) klass;
307 /* The parent class is needed for class method overrides. */
308 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
310 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_LUMA,
311 g_param_spec_boolean ("clamp_luma", "Clamp luma", "Clamp luma",
312 FALSE, G_PARAM_READWRITE));
313 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_CHROMA,
314 g_param_spec_boolean ("clamp_chroma", "Clamp chroma", "Clamp chroma",
315 FALSE, G_PARAM_READWRITE));
316 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY,
317 g_param_spec_enum ("quality", "Quality", "Decoding quality",
318 GST_TYPE_DVDEC_QUALITY, DV_DEFAULT_QUALITY, G_PARAM_READWRITE));
319 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DECODE_NTH,
320 g_param_spec_int ("drop-factor", "Drop Factor", "Only decode Nth frame",
321 1, G_MAXINT, DV_DEFAULT_DECODE_NTH, G_PARAM_READWRITE));
323 gobject_class->set_property = gst_dvdec_set_property;
324 gobject_class->get_property = gst_dvdec_get_property;
326 gstelement_class->change_state = gst_dvdec_change_state;
328 /* table initialization, only do once */
332 /* This function is responsible for initializing a specific instance of
336 gst_dvdec_init (GstDVDec * dvdec)
340 dvdec->found_header = FALSE;
343 gst_pad_new_from_template (gst_static_pad_template_get (&sink_temp),
345 gst_pad_set_query_function (dvdec->sinkpad, NULL);
346 gst_pad_set_convert_function (dvdec->sinkpad,
347 GST_DEBUG_FUNCPTR (gst_dvdec_sink_convert));
348 gst_pad_set_formats_function (dvdec->sinkpad,
349 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
350 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->sinkpad);
353 gst_pad_new_from_template (gst_static_pad_template_get (&video_src_temp),
355 gst_pad_set_query_function (dvdec->videosrcpad,
356 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
357 gst_pad_set_query_type_function (dvdec->videosrcpad,
358 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
359 gst_pad_set_event_function (dvdec->videosrcpad,
360 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
361 gst_pad_set_event_mask_function (dvdec->videosrcpad,
362 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
363 gst_pad_set_convert_function (dvdec->videosrcpad,
364 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
365 gst_pad_set_formats_function (dvdec->videosrcpad,
366 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
367 gst_pad_set_getcaps_function (dvdec->videosrcpad,
368 GST_DEBUG_FUNCPTR (gst_dvdec_video_getcaps));
369 gst_pad_set_link_function (dvdec->videosrcpad,
370 GST_DEBUG_FUNCPTR (gst_dvdec_video_link));
371 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->videosrcpad);
374 gst_pad_new_from_template (gst_static_pad_template_get (&audio_src_temp),
376 gst_pad_set_query_function (dvdec->audiosrcpad,
377 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
378 gst_pad_set_query_type_function (dvdec->audiosrcpad,
379 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
380 gst_pad_set_event_function (dvdec->audiosrcpad,
381 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
382 gst_pad_set_event_mask_function (dvdec->audiosrcpad,
383 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
384 gst_pad_set_convert_function (dvdec->audiosrcpad,
385 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
386 gst_pad_set_formats_function (dvdec->audiosrcpad,
387 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
388 gst_pad_use_explicit_caps (dvdec->audiosrcpad);
389 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->audiosrcpad);
391 gst_element_set_loop_function (GST_ELEMENT (dvdec), gst_dvdec_loop);
395 dvdec->next_ts = 0LL;
396 dvdec->end_position = -1LL;
397 dvdec->need_discont = FALSE;
398 dvdec->new_media = FALSE;
399 dvdec->framerate = 0;
401 dvdec->frequency = 0;
404 dvdec->drop_factor = 1;
406 dvdec->clamp_luma = FALSE;
407 dvdec->clamp_chroma = FALSE;
408 dvdec->quality = DV_DEFAULT_QUALITY;
411 for (i = 0; i < 4; i++) {
412 dvdec->audio_buffers[i] =
413 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
417 static const GstFormat *
418 gst_dvdec_get_formats (GstPad * pad)
420 static const GstFormat src_formats[] = {
426 static const GstFormat sink_formats[] = {
433 return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
437 gst_dvdec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
438 GstFormat * dest_format, gint64 * dest_value)
443 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
444 if (dvdec->length == 0)
447 if (dvdec->decoder == NULL)
450 switch (src_format) {
451 case GST_FORMAT_BYTES:
452 switch (*dest_format) {
453 case GST_FORMAT_BYTES:
454 *dest_value = src_value;
456 case GST_FORMAT_DEFAULT:
457 case GST_FORMAT_TIME:
458 *dest_format = GST_FORMAT_TIME;
459 if (pad == dvdec->videosrcpad)
460 *dest_value = src_value * GST_SECOND /
461 (720 * dvdec->height * dvdec->bpp * dvdec->framerate /
463 else if (pad == dvdec->audiosrcpad)
464 *dest_value = src_value * GST_SECOND /
465 (2 * dvdec->frequency * dvdec->channels);
471 case GST_FORMAT_TIME:
472 switch (*dest_format) {
473 case GST_FORMAT_BYTES:
474 if (pad == dvdec->videosrcpad)
475 *dest_value = src_value * 720 * dvdec->height * dvdec->bpp *
476 dvdec->framerate / GST_SECOND;
477 else if (pad == dvdec->audiosrcpad)
478 *dest_value = 2 * src_value * dvdec->frequency *
479 dvdec->channels / GST_SECOND;
481 case GST_FORMAT_TIME:
482 case GST_FORMAT_DEFAULT:
483 *dest_format = GST_FORMAT_TIME;
484 *dest_value = src_value;
497 gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
498 GstFormat * dest_format, gint64 * dest_value)
503 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
505 if (dvdec->length == 0)
508 if (*dest_format == GST_FORMAT_DEFAULT)
509 *dest_format = GST_FORMAT_TIME;
511 switch (src_format) {
512 case GST_FORMAT_BYTES:
513 switch (*dest_format) {
514 case GST_FORMAT_TIME:
518 /* get frame number */
519 frame = src_value / dvdec->length;
521 *dest_value = (frame * GST_SECOND) / dvdec->framerate;
524 case GST_FORMAT_BYTES:
525 *dest_value = src_value;
531 case GST_FORMAT_TIME:
532 switch (*dest_format) {
533 case GST_FORMAT_BYTES:
537 /* calculate the frame */
538 frame = src_value * dvdec->framerate / GST_SECOND;
539 /* calculate the offset */
540 *dest_value = frame * dvdec->length;
543 case GST_FORMAT_TIME:
544 *dest_value = src_value;
556 static const GstQueryType *
557 gst_dvdec_get_src_query_types (GstPad * pad)
559 static const GstQueryType src_query_types[] = {
565 return src_query_types;
569 gst_dvdec_src_query (GstPad * pad, GstQueryType type,
570 GstFormat * format, gint64 * value)
575 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
578 case GST_QUERY_TOTAL:
583 GstFormat tmp_format;
588 len = gst_bytestream_length (dvdec->bs);
589 tmp_format = GST_FORMAT_TIME;
590 if (len == -1 || !gst_pad_convert (dvdec->sinkpad,
591 GST_FORMAT_BYTES, len, &tmp_format, value)) {
594 if (!gst_pad_convert (pad, GST_FORMAT_TIME, *value, format, value)) {
601 case GST_QUERY_POSITION:
605 gst_pad_convert (pad, GST_FORMAT_TIME, dvdec->next_ts, format,
617 static const GstEventMask *
618 gst_dvdec_get_event_masks (GstPad * pad)
620 static const GstEventMask src_event_masks[] = {
621 {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
624 static const GstEventMask sink_event_masks[] = {
626 {GST_EVENT_DISCONTINUOUS, 0},
627 {GST_EVENT_FLUSH, 0},
631 return (GST_PAD_IS_SRC (pad) ? src_event_masks : sink_event_masks);
635 gst_dvdec_handle_sink_event (GstDVDec * dvdec)
641 gst_bytestream_get_status (dvdec->bs, &remaining, &event);
643 type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
646 case GST_EVENT_FLUSH:
648 case GST_EVENT_FILLER:
650 /* Forward the event to output sinks */
651 if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
652 gst_event_ref (event);
653 gst_pad_push (dvdec->videosrcpad, GST_DATA (event));
655 if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
656 gst_event_ref (event);
657 gst_pad_push (dvdec->audiosrcpad, GST_DATA (event));
661 case GST_EVENT_DISCONTINUOUS:
664 gboolean found = FALSE;
667 format = GST_FORMAT_TIME;
668 /* try to get a timestamp from the discont formats */
669 for (i = 0; i < GST_EVENT_DISCONT_OFFSET_LEN (event); i++) {
670 if (gst_pad_convert (dvdec->sinkpad,
671 GST_EVENT_DISCONT_OFFSET (event, i).format,
672 GST_EVENT_DISCONT_OFFSET (event, i).value,
673 &format, &dvdec->next_ts)) {
680 dvdec->next_ts = 0LL;
682 dvdec->need_discont = TRUE;
686 return gst_pad_event_default (dvdec->sinkpad, event);
689 gst_event_unref (event);
694 gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event)
699 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
701 switch (GST_EVENT_TYPE (event)) {
702 case GST_EVENT_SEEK_SEGMENT:
707 /* first bring the format to time */
708 format = GST_FORMAT_TIME;
709 if (!gst_pad_convert (pad,
710 GST_EVENT_SEEK_FORMAT (event),
711 GST_EVENT_SEEK_ENDOFFSET (event), &format, &position)) {
712 /* could not convert seek format to time offset */
717 dvdec->end_position = position;
718 dvdec->loop = GST_EVENT_SEEK_TYPE (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
725 /* first bring the format to time */
726 format = GST_FORMAT_TIME;
727 if (!gst_pad_convert (pad,
728 GST_EVENT_SEEK_FORMAT (event),
729 GST_EVENT_SEEK_OFFSET (event), &format, &position)) {
730 /* could not convert seek format to time offset */
734 dvdec->next_ts = position;
735 /* then try to figure out the byteoffset for this time */
736 format = GST_FORMAT_BYTES;
737 if (!gst_pad_convert (dvdec->sinkpad, GST_FORMAT_TIME, position,
738 &format, &position)) {
739 /* could not convert seek format to byte offset */
744 if (!gst_bytestream_seek (dvdec->bs, position, GST_SEEK_METHOD_SET)) {
747 if (GST_EVENT_TYPE (event) != GST_EVENT_SEEK_SEGMENT)
748 dvdec->end_position = -1;
755 gst_event_unref (event);
760 gst_dvdec_video_getcaps (GstPad * pad)
764 GstPadTemplate *src_pad_template;
766 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
767 src_pad_template = gst_static_pad_template_get (&video_src_temp);
768 caps = gst_caps_copy (gst_pad_template_get_caps (src_pad_template));
770 if (dvdec->found_header) {
776 par_x = PAL_WIDE_PAR_X;
777 par_y = PAL_WIDE_PAR_Y;
779 par_x = PAL_NORMAL_PAR_X;
780 par_y = PAL_NORMAL_PAR_Y;
784 par_x = NTSC_WIDE_PAR_X;
785 par_y = NTSC_WIDE_PAR_Y;
787 par_x = NTSC_NORMAL_PAR_X;
788 par_y = NTSC_NORMAL_PAR_Y;
792 for (i = 0; i < gst_caps_get_size (caps); i++) {
793 GstStructure *structure = gst_caps_get_structure (caps, i);
795 gst_structure_set (structure,
796 "height", G_TYPE_INT, dvdec->height,
797 "framerate", G_TYPE_DOUBLE, dvdec->framerate / dvdec->drop_factor,
798 "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
805 static GstPadLinkReturn
806 gst_dvdec_video_link (GstPad * pad, const GstCaps * caps)
809 GstStructure *structure;
814 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
816 /* if we did not find a header yet, return delayed */
817 if (!dvdec->found_header) {
818 return GST_PAD_LINK_DELAYED;
821 structure = gst_caps_get_structure (caps, 0);
823 if (!gst_structure_get_int (structure, "height", &height) ||
824 !gst_structure_get_double (structure, "framerate", &framerate))
825 return GST_PAD_LINK_REFUSED;
827 if ((height != dvdec->height)
828 || (framerate != dvdec->framerate / dvdec->drop_factor))
829 return GST_PAD_LINK_REFUSED;
831 if (strcmp (gst_structure_get_name (structure), "video/x-raw-rgb") == 0) {
834 gst_structure_get_int (structure, "bpp", &bpp);
836 dvdec->space = e_dv_color_rgb;
839 dvdec->space = e_dv_color_bgr0;
843 if (!gst_structure_get_fourcc (structure, "format", &fourcc))
844 return GST_PAD_LINK_REFUSED;
846 dvdec->space = e_dv_color_yuv;
850 return GST_PAD_LINK_OK;
854 gst_dvdec_push (GstDVDec * dvdec, GstBuffer * outbuf, GstPad * pad,
857 if ((dvdec->need_discont) || (dvdec->new_media)) {
860 discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, ts, NULL);
861 GST_EVENT_DISCONT_NEW_MEDIA (discont) = dvdec->new_media;
863 gst_pad_push (pad, GST_DATA (discont));
866 gst_pad_push (pad, GST_DATA (outbuf));
868 if ((dvdec->end_position != -1) && (dvdec->next_ts >= dvdec->end_position)) {
870 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_SEGMENT_DONE)));
872 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
877 gst_dvdec_loop (GstElement * element)
880 GstBuffer *buf, *outbuf;
883 guint32 length, got_bytes;
884 GstClockTime ts, duration;
888 dvdec = GST_DVDEC (element);
891 * Apparently dv_parse_header can read from the body of the frame
892 * too, so it needs more than header_size bytes. Wacky!
894 if (dvdec->found_header)
895 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
897 length = NTSC_BUFFER;
899 /* first read enough bytes to parse the header */
900 got_bytes = gst_bytestream_peek_bytes (dvdec->bs, &inframe, length);
901 if (got_bytes < length) {
902 gst_dvdec_handle_sink_event (dvdec);
905 if (dv_parse_header (dvdec->decoder, inframe) < 0) {
906 GST_ELEMENT_ERROR (dvdec, STREAM, DECODE, (NULL), (NULL));
910 /* after parsing the header we know the length of the data */
911 dvdec->PAL = dv_system_50_fields (dvdec->decoder);
912 dvdec->found_header = TRUE;
914 fps = (dvdec->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE);
915 height = (dvdec->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
916 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
917 wide = dv_format_wide (dvdec->decoder);
919 if (length != dvdec->length) {
920 dvdec->length = length;
921 gst_bytestream_size_hint (dvdec->bs, length);
924 /* then read the read data */
925 got_bytes = gst_bytestream_read (dvdec->bs, &buf, length);
926 if (got_bytes < length) {
927 gst_dvdec_handle_sink_event (dvdec);
932 dvdec->next_ts += GST_SECOND / fps;
933 duration = dvdec->next_ts - ts;
935 dv_parse_packs (dvdec->decoder, GST_BUFFER_DATA (buf));
936 if (dv_is_new_recording (dvdec->decoder, GST_BUFFER_DATA (buf)))
937 dvdec->new_media = TRUE;
938 if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
941 dv_decode_full_audio (dvdec->decoder, GST_BUFFER_DATA (buf),
942 dvdec->audio_buffers);
944 if ((dv_get_frequency (dvdec->decoder) != dvdec->frequency) ||
945 (dv_get_num_channels (dvdec->decoder) != dvdec->channels)) {
946 if (!gst_pad_set_explicit_caps (dvdec->audiosrcpad,
947 gst_caps_new_simple ("audio/x-raw-int",
948 "rate", G_TYPE_INT, dv_get_frequency (dvdec->decoder),
949 "depth", G_TYPE_INT, 16,
950 "width", G_TYPE_INT, 16,
951 "signed", G_TYPE_BOOLEAN, TRUE,
952 "channels", G_TYPE_INT, dv_get_num_channels (dvdec->decoder),
953 "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, NULL))) {
954 gst_buffer_unref (buf);
955 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL),
956 ("Failed to negotiate audio parameters for the DV audio stream"));
960 dvdec->frequency = dv_get_frequency (dvdec->decoder);
961 dvdec->channels = dv_get_num_channels (dvdec->decoder);
964 num_samples = dv_get_num_samples (dvdec->decoder);
970 outbuf = gst_buffer_new ();
971 GST_BUFFER_SIZE (outbuf) = dv_get_num_samples (dvdec->decoder) *
972 sizeof (gint16) * dv_get_num_channels (dvdec->decoder);
973 GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
975 a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
977 for (i = 0; i < num_samples; i++) {
978 for (j = 0; j < dv_get_num_channels (dvdec->decoder); j++) {
979 *(a_ptr++) = dvdec->audio_buffers[j][i];
983 GST_BUFFER_TIMESTAMP (outbuf) = ts;
984 GST_BUFFER_DURATION (outbuf) = duration;
985 GST_BUFFER_OFFSET (outbuf) = dvdec->audio_offset;
986 dvdec->audio_offset += num_samples;
987 GST_BUFFER_OFFSET_END (outbuf) = dvdec->audio_offset;
989 gst_dvdec_push (dvdec, outbuf, dvdec->audiosrcpad, ts);
992 dvdec->frequency = dv_get_frequency (dvdec->decoder);
993 dvdec->channels = dv_get_num_channels (dvdec->decoder);
996 if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
998 guint8 *outframe_ptrs[3];
999 gint outframe_pitches[3];
1001 dvdec->framecount++;
1002 if (dvdec->framecount < dvdec->drop_factor) {
1006 dvdec->framecount = 0;
1008 if ((dvdec->framerate != fps) || (dvdec->height != height)
1009 || dvdec->wide != wide) {
1010 dvdec->height = height;
1011 dvdec->framerate = fps;
1014 if (GST_PAD_LINK_FAILED (gst_pad_renegotiate (dvdec->videosrcpad))) {
1015 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL), (NULL));
1020 outbuf = gst_buffer_new_and_alloc ((720 * height) * dvdec->bpp);
1022 outframe = GST_BUFFER_DATA (outbuf);
1024 outframe_ptrs[0] = outframe;
1025 outframe_pitches[0] = 720 * dvdec->bpp;
1027 /* the rest only matters for YUY2 */
1028 if (dvdec->bpp < 3) {
1029 outframe_ptrs[1] = outframe_ptrs[0] + 720 * height;
1030 outframe_ptrs[2] = outframe_ptrs[1] + 360 * height;
1032 outframe_pitches[1] = height / 2;
1033 outframe_pitches[2] = outframe_pitches[1];
1036 dv_decode_full_frame (dvdec->decoder, GST_BUFFER_DATA (buf),
1037 dvdec->space, outframe_ptrs, outframe_pitches);
1039 GST_BUFFER_TIMESTAMP (outbuf) = ts;
1040 GST_BUFFER_DURATION (outbuf) = duration * dvdec->drop_factor;
1042 gst_dvdec_push (dvdec, outbuf, dvdec->videosrcpad, ts);
1044 dvdec->height = height;
1045 dvdec->framerate = fps;
1050 if ((dvdec->end_position != -1) &&
1051 (dvdec->next_ts >= dvdec->end_position) && !dvdec->loop) {
1052 gst_element_set_eos (GST_ELEMENT (dvdec));
1055 dvdec->need_discont = FALSE;
1056 dvdec->new_media = FALSE;
1058 gst_buffer_unref (buf);
1061 static GstElementStateReturn
1062 gst_dvdec_change_state (GstElement * element)
1064 GstDVDec *dvdec = GST_DVDEC (element);
1066 switch (GST_STATE_TRANSITION (element)) {
1067 case GST_STATE_NULL_TO_READY:
1069 case GST_STATE_READY_TO_PAUSED:
1070 dvdec->bs = gst_bytestream_new (dvdec->sinkpad);
1072 dv_decoder_new (0, dvdec->clamp_luma, dvdec->clamp_chroma);
1073 dvdec->decoder->quality = qualities[dvdec->quality];
1074 dvdec->audio_offset = 0;
1075 dvdec->framecount = 0;
1077 * Enable this function call when libdv2 0.100 or higher is more
1080 /* dv_set_quality (dvdec->decoder, qualities [dvdec->quality]); */
1082 case GST_STATE_PAUSED_TO_PLAYING:
1084 case GST_STATE_PLAYING_TO_PAUSED:
1086 case GST_STATE_PAUSED_TO_READY:
1087 dv_decoder_free (dvdec->decoder);
1088 dvdec->decoder = NULL;
1089 dvdec->found_header = FALSE;
1090 gst_bytestream_destroy (dvdec->bs);
1093 case GST_STATE_READY_TO_NULL:
1099 return parent_class->change_state (element);
1102 /* Arguments are part of the Gtk+ object system, and these functions
1103 * enable the element to respond to various arguments.
1106 gst_dvdec_set_property (GObject * object, guint prop_id, const GValue * value,
1111 /* It's not null if we got it, but it might not be ours */
1112 g_return_if_fail (GST_IS_DVDEC (object));
1114 /* Get a pointer of the right type. */
1115 dvdec = GST_DVDEC (object);
1117 /* Check the argument id to see which argument we're setting. */
1119 case ARG_CLAMP_LUMA:
1120 dvdec->clamp_luma = g_value_get_boolean (value);
1122 case ARG_CLAMP_CHROMA:
1123 dvdec->clamp_chroma = g_value_get_boolean (value);
1126 dvdec->quality = g_value_get_enum (value);
1127 if ((dvdec->quality < 0) || (dvdec->quality > 5))
1130 case ARG_DECODE_NTH:
1131 dvdec->drop_factor = g_value_get_int (value);
1134 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1139 /* The set function is simply the inverse of the get fuction. */
1141 gst_dvdec_get_property (GObject * object, guint prop_id, GValue * value,
1146 /* It's not null if we got it, but it might not be ours */
1147 g_return_if_fail (GST_IS_DVDEC (object));
1148 dvdec = GST_DVDEC (object);
1151 case ARG_CLAMP_LUMA:
1152 g_value_set_boolean (value, dvdec->clamp_luma);
1154 case ARG_CLAMP_CHROMA:
1155 g_value_set_boolean (value, dvdec->clamp_chroma);
1158 g_value_set_enum (value, dvdec->quality);
1160 case ARG_DECODE_NTH:
1161 g_value_set_int (value, dvdec->drop_factor);
1164 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1169 /* This is the entry into the plugin itself. When the plugin loads,
1170 * this function is called to register everything that the plugin provides.
1173 plugin_init (GstPlugin * plugin)
1175 if (!gst_library_load ("gstbytestream"))
1178 if (!gst_element_register (plugin, "dvdec", GST_RANK_PRIMARY,
1179 gst_dvdec_get_type ()))
1185 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1188 "Uses libdv to decode DV video (libdv.sourceforge.net)",
1189 plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN);