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.
26 /* First, include the header file for the plugin, to bring in the
27 * object definition and other useful things.
31 #define NTSC_HEIGHT 480
32 #define NTSC_BUFFER 120000
33 #define NTSC_FRAMERATE 30000/1001
35 #define PAL_HEIGHT 576
36 #define PAL_BUFFER 144000
37 #define PAL_FRAMERATE 25.0
39 #define PAL_NORMAL_PAR_X 16
40 #define PAL_NORMAL_PAR_Y 15
41 #define PAL_WIDE_PAR_X 64
42 #define PAL_WIDE_PAR_Y 45
44 #define NTSC_NORMAL_PAR_X 80
45 #define NTSC_NORMAL_PAR_Y 89
46 #define NTSC_WIDE_PAR_X 320
47 #define NTSC_WIDE_PAR_Y 267
49 /* The ElementDetails structure gives a human-readable description
50 * of the plugin, as well as author and version data.
52 static GstElementDetails dvdec_details =
53 GST_ELEMENT_DETAILS ("DV (smpte314) decoder plugin",
54 "Codec/Decoder/Video",
55 "Uses libdv to decode DV video (libdv.sourceforge.net)",
56 "Erik Walthinsen <omega@cse.ogi.edu>\n" "Wim Taymans <wim.taymans@tvd.be>");
59 /* These are the signals that this element can fire. They are zero-
60 * based because the numbers themselves are private to the object.
61 * LAST_SIGNAL is used for initialization of the signal array.
69 #define DV_DEFAULT_QUALITY DV_QUALITY_BEST
70 #define DV_DEFAULT_DECODE_NTH 1
72 /* Arguments are identified the same way, but cannot be zero, so you
73 * must leave the ARG_0 entry in as a placeholder.
85 const gint qualities[] = {
89 DV_QUALITY_DC | DV_QUALITY_COLOR,
90 DV_QUALITY_AC_1 | DV_QUALITY_COLOR,
91 DV_QUALITY_AC_2 | DV_QUALITY_COLOR
94 /* The PadFactory structures describe what pads the element has or
95 * can have. They can be quite complex, but for this dvdec plugin
96 * they are rather simple.
98 static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
101 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true")
104 static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video",
107 GST_STATIC_CAPS ("video/x-raw-yuv, "
108 "format = (fourcc) YUY2, "
109 "width = (int) 720, "
111 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
113 "pixel-aspect-ratio=(fraction) { "
114 G_STRINGIFY (PAL_NORMAL_PAR_X) "/" G_STRINGIFY (PAL_NORMAL_PAR_Y) ","
115 G_STRINGIFY (PAL_WIDE_PAR_X) "/" G_STRINGIFY (PAL_WIDE_PAR_Y) ","
116 G_STRINGIFY (NTSC_NORMAL_PAR_X) "/" G_STRINGIFY (NTSC_NORMAL_PAR_Y) ","
117 G_STRINGIFY (NTSC_WIDE_PAR_X) "/" G_STRINGIFY (NTSC_WIDE_PAR_Y) "},"
118 "framerate = (double) [ 1.0, 60.0 ];"
119 //"framerate = (double) { "
120 //G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
125 "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", "
126 "red_mask = (int) 0x0000ff00, "
127 "green_mask = (int) 0x00ff0000, "
128 "blue_mask = (int) 0xff000000, "
129 "width = (int) 720, "
131 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
133 "pixel-aspect-ratio=(fraction) { "
134 G_STRINGIFY (PAL_NORMAL_PAR_X) "/" G_STRINGIFY (PAL_NORMAL_PAR_Y) ","
135 G_STRINGIFY (PAL_WIDE_PAR_X) "/" G_STRINGIFY (PAL_WIDE_PAR_Y) ","
136 G_STRINGIFY (NTSC_NORMAL_PAR_X) "/" G_STRINGIFY (NTSC_NORMAL_PAR_Y) ","
137 G_STRINGIFY (NTSC_WIDE_PAR_X) "/" G_STRINGIFY (NTSC_WIDE_PAR_Y) "},"
138 "framerate = (double) [ 1.0, 60.0 ];"
139 //"framerate = (double) { "
140 //G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
145 "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", "
146 "red_mask = (int) 0x00ff0000, "
147 "green_mask = (int) 0x0000ff00, "
148 "blue_mask = (int) 0x000000ff, "
149 "width = (int) 720, "
151 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
153 "pixel-aspect-ratio=(fraction) { "
154 G_STRINGIFY (PAL_NORMAL_PAR_X) "/" G_STRINGIFY (PAL_NORMAL_PAR_Y) ","
155 G_STRINGIFY (PAL_WIDE_PAR_X) "/" G_STRINGIFY (PAL_WIDE_PAR_Y) ","
156 G_STRINGIFY (NTSC_NORMAL_PAR_X) "/" G_STRINGIFY (NTSC_NORMAL_PAR_Y) ","
157 G_STRINGIFY (NTSC_WIDE_PAR_X) "/" G_STRINGIFY (NTSC_WIDE_PAR_Y) "},"
158 "framerate = (double) [ 1.0, 60.0 ]"
159 //"framerate = (double) { "
160 //G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
165 static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
168 GST_STATIC_CAPS ("audio/x-raw-int, "
171 "signed = (boolean) TRUE, "
172 "channels = (int) {2, 4}, "
173 "endianness = (int) " G_STRINGIFY (G_LITTLE_ENDIAN) ", "
174 "rate = (int) { 32000, 44100, 48000 }")
177 #define GST_TYPE_DVDEC_QUALITY (gst_dvdec_quality_get_type())
179 gst_dvdec_quality_get_type (void)
181 static GType qtype = 0;
184 static const GEnumValue values[] = {
185 {0, "DV_QUALITY_FASTEST", "Fastest decoding, low-quality mono"},
186 {1, "DV_QUALITY_AC_1", "Mono decoding using the first AC coefficient"},
187 {2, "DV_QUALITY_AC_2", "Highest quality mono decoding"},
188 {3, "DV_QUALITY_DC|DV_QUALITY_COLOUR", "Fastest colour decoding"},
189 {4, "DV_QUALITY_AC_1|DV_QUALITY_COLOUR",
190 "Colour, using only the first AC coefficient"},
191 {5, "DV_QUALITY_BEST", "Highest quality colour decoding"},
195 qtype = g_enum_register_static ("GstDVDecQualityEnum", values);
200 /* A number of functon prototypes are given so we can refer to them later. */
201 static void gst_dvdec_base_init (gpointer g_class);
202 static void gst_dvdec_class_init (GstDVDecClass * klass);
203 static void gst_dvdec_init (GstDVDec * dvdec);
205 static const GstQueryType *gst_dvdec_get_src_query_types (GstPad * pad);
206 static gboolean gst_dvdec_src_query (GstPad * pad, GstQueryType type,
207 GstFormat * format, gint64 * value);
208 static const GstFormat *gst_dvdec_get_formats (GstPad * pad);
209 static gboolean gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format,
210 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
211 static gboolean gst_dvdec_src_convert (GstPad * pad, GstFormat src_format,
212 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
214 static GstPadLinkReturn gst_dvdec_video_link (GstPad * pad,
215 const GstCaps * caps);
216 static GstCaps *gst_dvdec_video_getcaps (GstPad * pad);
218 static const GstEventMask *gst_dvdec_get_event_masks (GstPad * pad);
219 static gboolean gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event);
221 static void gst_dvdec_loop (GstElement * element);
223 static GstElementStateReturn gst_dvdec_change_state (GstElement * element);
225 static void gst_dvdec_set_property (GObject * object, guint prop_id,
226 const GValue * value, GParamSpec * pspec);
227 static void gst_dvdec_get_property (GObject * object, guint prop_id,
228 GValue * value, GParamSpec * pspec);
230 /* The parent class pointer needs to be kept around for some object
233 static GstElementClass *parent_class = NULL;
235 /* This array holds the ids of the signals registered for this object.
236 * The array indexes are based on the enum up above.
238 /*static guint gst_dvdec_signals[LAST_SIGNAL] = { 0 }; */
240 /* This function is used to register and subsequently return the type
241 * identifier for this object class. On first invocation, it will
242 * register the type, providing the name of the class, struct sizes,
243 * and pointers to the various functions that define the class.
246 gst_dvdec_get_type (void)
248 static GType dvdec_type = 0;
251 static const GTypeInfo dvdec_info = {
252 sizeof (GstDVDecClass),
255 (GClassInitFunc) gst_dvdec_class_init,
260 (GInstanceInitFunc) gst_dvdec_init,
264 g_type_register_static (GST_TYPE_ELEMENT, "GstDVDec", &dvdec_info, 0);
270 gst_dvdec_base_init (gpointer g_class)
272 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
274 /* The pad templates can be easily generated from the factories above,
275 * and then added to the list of padtemplates for the elementfactory.
276 * Note that the generated padtemplates are stored in static global
277 * variables, for the gst_dvdec_init function to use later on.
279 gst_element_class_add_pad_template (element_class,
280 gst_static_pad_template_get (&sink_temp));
281 gst_element_class_add_pad_template (element_class,
282 gst_static_pad_template_get (&video_src_temp));
283 gst_element_class_add_pad_template (element_class,
284 gst_static_pad_template_get (&audio_src_temp));
286 gst_element_class_set_details (element_class, &dvdec_details);
289 /* In order to create an instance of an object, the class must be
290 * initialized by this function. GObject will take care of running
291 * it, based on the pointer to the function provided above.
294 gst_dvdec_class_init (GstDVDecClass * klass)
296 /* Class pointers are needed to supply pointers to the private
297 * implementations of parent class methods.
299 GObjectClass *gobject_class;
300 GstElementClass *gstelement_class;
302 /* Since the dvdec class contains the parent classes, you can simply
303 * cast the pointer to get access to the parent classes.
305 gobject_class = (GObjectClass *) klass;
306 gstelement_class = (GstElementClass *) klass;
308 /* The parent class is needed for class method overrides. */
309 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
311 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_LUMA,
312 g_param_spec_boolean ("clamp_luma", "Clamp luma", "Clamp luma",
313 FALSE, G_PARAM_READWRITE));
314 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_CHROMA,
315 g_param_spec_boolean ("clamp_chroma", "Clamp chroma", "Clamp chroma",
316 FALSE, G_PARAM_READWRITE));
317 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY,
318 g_param_spec_enum ("quality", "Quality", "Decoding quality",
319 GST_TYPE_DVDEC_QUALITY, DV_DEFAULT_QUALITY, G_PARAM_READWRITE));
320 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_DECODE_NTH,
321 g_param_spec_int ("drop-factor", "Drop Factor", "Only decode Nth frame",
322 1, G_MAXINT, DV_DEFAULT_DECODE_NTH, G_PARAM_READWRITE));
324 gobject_class->set_property = gst_dvdec_set_property;
325 gobject_class->get_property = gst_dvdec_get_property;
327 gstelement_class->change_state = gst_dvdec_change_state;
329 /* table initialization, only do once */
333 /* This function is responsible for initializing a specific instance of
337 gst_dvdec_init (GstDVDec * dvdec)
341 dvdec->found_header = FALSE;
344 gst_pad_new_from_template (gst_static_pad_template_get (&sink_temp),
346 gst_pad_set_query_function (dvdec->sinkpad, NULL);
347 gst_pad_set_convert_function (dvdec->sinkpad,
348 GST_DEBUG_FUNCPTR (gst_dvdec_sink_convert));
349 gst_pad_set_formats_function (dvdec->sinkpad,
350 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
351 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->sinkpad);
354 gst_pad_new_from_template (gst_static_pad_template_get (&video_src_temp),
356 gst_pad_set_query_function (dvdec->videosrcpad,
357 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
358 gst_pad_set_query_type_function (dvdec->videosrcpad,
359 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
360 gst_pad_set_event_function (dvdec->videosrcpad,
361 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
362 gst_pad_set_event_mask_function (dvdec->videosrcpad,
363 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
364 gst_pad_set_convert_function (dvdec->videosrcpad,
365 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
366 gst_pad_set_formats_function (dvdec->videosrcpad,
367 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
368 gst_pad_set_getcaps_function (dvdec->videosrcpad,
369 GST_DEBUG_FUNCPTR (gst_dvdec_video_getcaps));
370 gst_pad_set_link_function (dvdec->videosrcpad,
371 GST_DEBUG_FUNCPTR (gst_dvdec_video_link));
372 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->videosrcpad);
375 gst_pad_new_from_template (gst_static_pad_template_get (&audio_src_temp),
377 gst_pad_set_query_function (dvdec->audiosrcpad,
378 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
379 gst_pad_set_query_type_function (dvdec->audiosrcpad,
380 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
381 gst_pad_set_event_function (dvdec->audiosrcpad,
382 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
383 gst_pad_set_event_mask_function (dvdec->audiosrcpad,
384 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
385 gst_pad_set_convert_function (dvdec->audiosrcpad,
386 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
387 gst_pad_set_formats_function (dvdec->audiosrcpad,
388 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
389 gst_pad_use_explicit_caps (dvdec->audiosrcpad);
390 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->audiosrcpad);
392 gst_element_set_loop_function (GST_ELEMENT (dvdec), gst_dvdec_loop);
396 dvdec->next_ts = 0LL;
397 dvdec->end_position = -1LL;
398 dvdec->need_discont = FALSE;
399 dvdec->new_media = FALSE;
400 dvdec->framerate = 0;
402 dvdec->frequency = 0;
405 dvdec->drop_factor = 1;
407 dvdec->clamp_luma = FALSE;
408 dvdec->clamp_chroma = FALSE;
409 dvdec->quality = DV_DEFAULT_QUALITY;
412 for (i = 0; i < 4; i++) {
413 dvdec->audio_buffers[i] =
414 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
418 static const GstFormat *
419 gst_dvdec_get_formats (GstPad * pad)
421 static const GstFormat src_formats[] = {
427 static const GstFormat sink_formats[] = {
434 return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
438 gst_dvdec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
439 GstFormat * dest_format, gint64 * dest_value)
444 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
445 if (dvdec->length == 0)
448 if (dvdec->decoder == NULL)
451 switch (src_format) {
452 case GST_FORMAT_BYTES:
453 switch (*dest_format) {
454 case GST_FORMAT_BYTES:
455 *dest_value = src_value;
457 case GST_FORMAT_DEFAULT:
458 case GST_FORMAT_TIME:
459 *dest_format = GST_FORMAT_TIME;
460 if (pad == dvdec->videosrcpad)
461 *dest_value = src_value * GST_SECOND /
462 (720 * dvdec->height * dvdec->bpp * dvdec->framerate /
464 else if (pad == dvdec->audiosrcpad)
465 *dest_value = src_value * GST_SECOND /
466 (2 * dvdec->frequency * dvdec->channels);
472 case GST_FORMAT_TIME:
473 switch (*dest_format) {
474 case GST_FORMAT_BYTES:
475 if (pad == dvdec->videosrcpad)
476 *dest_value = src_value * 720 * dvdec->height * dvdec->bpp *
477 dvdec->framerate / GST_SECOND;
478 else if (pad == dvdec->audiosrcpad)
479 *dest_value = 2 * src_value * dvdec->frequency *
480 dvdec->channels / GST_SECOND;
482 case GST_FORMAT_TIME:
483 case GST_FORMAT_DEFAULT:
484 *dest_format = GST_FORMAT_TIME;
485 *dest_value = src_value;
498 gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
499 GstFormat * dest_format, gint64 * dest_value)
504 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
506 if (dvdec->length == 0)
509 if (*dest_format == GST_FORMAT_DEFAULT)
510 *dest_format = GST_FORMAT_TIME;
512 switch (src_format) {
513 case GST_FORMAT_BYTES:
514 switch (*dest_format) {
515 case GST_FORMAT_TIME:
519 /* get frame number */
520 frame = src_value / dvdec->length;
522 *dest_value = (frame * GST_SECOND) / dvdec->framerate;
525 case GST_FORMAT_BYTES:
526 *dest_value = src_value;
532 case GST_FORMAT_TIME:
533 switch (*dest_format) {
534 case GST_FORMAT_BYTES:
538 /* calculate the frame */
539 frame = src_value * dvdec->framerate / GST_SECOND;
540 /* calculate the offset */
541 *dest_value = frame * dvdec->length;
544 case GST_FORMAT_TIME:
545 *dest_value = src_value;
557 static const GstQueryType *
558 gst_dvdec_get_src_query_types (GstPad * pad)
560 static const GstQueryType src_query_types[] = {
566 return src_query_types;
570 gst_dvdec_src_query (GstPad * pad, GstQueryType type,
571 GstFormat * format, gint64 * value)
576 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
579 case GST_QUERY_TOTAL:
584 GstFormat tmp_format;
589 len = gst_bytestream_length (dvdec->bs);
590 tmp_format = GST_FORMAT_TIME;
591 if (len == -1 || !gst_pad_convert (dvdec->sinkpad,
592 GST_FORMAT_BYTES, len, &tmp_format, value)) {
595 if (!gst_pad_convert (pad, GST_FORMAT_TIME, *value, format, value)) {
602 case GST_QUERY_POSITION:
606 gst_pad_convert (pad, GST_FORMAT_TIME, dvdec->next_ts, format,
618 static const GstEventMask *
619 gst_dvdec_get_event_masks (GstPad * pad)
621 static const GstEventMask src_event_masks[] = {
622 {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
625 static const GstEventMask sink_event_masks[] = {
627 {GST_EVENT_DISCONTINUOUS, 0},
628 {GST_EVENT_FLUSH, 0},
632 return (GST_PAD_IS_SRC (pad) ? src_event_masks : sink_event_masks);
636 gst_dvdec_handle_sink_event (GstDVDec * dvdec)
642 gst_bytestream_get_status (dvdec->bs, &remaining, &event);
644 type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
647 case GST_EVENT_FLUSH:
649 case GST_EVENT_FILLER:
651 /* Forward the event to output sinks */
652 if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
653 gst_event_ref (event);
654 gst_pad_push (dvdec->videosrcpad, GST_DATA (event));
656 if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
657 gst_event_ref (event);
658 gst_pad_push (dvdec->audiosrcpad, GST_DATA (event));
660 if (type == GST_EVENT_EOS) {
661 gst_element_set_eos (GST_ELEMENT (dvdec));
665 case GST_EVENT_DISCONTINUOUS:
668 gboolean found = FALSE;
671 format = GST_FORMAT_TIME;
672 /* try to get a timestamp from the discont formats */
673 for (i = 0; i < GST_EVENT_DISCONT_OFFSET_LEN (event); i++) {
674 if (gst_pad_convert (dvdec->sinkpad,
675 GST_EVENT_DISCONT_OFFSET (event, i).format,
676 GST_EVENT_DISCONT_OFFSET (event, i).value,
677 &format, &dvdec->next_ts)) {
684 dvdec->next_ts = 0LL;
686 dvdec->need_discont = TRUE;
690 return gst_pad_event_default (dvdec->sinkpad, event);
693 gst_event_unref (event);
698 gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event)
703 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
705 switch (GST_EVENT_TYPE (event)) {
706 case GST_EVENT_SEEK_SEGMENT:
711 /* first bring the format to time */
712 format = GST_FORMAT_TIME;
713 if (!gst_pad_convert (pad,
714 GST_EVENT_SEEK_FORMAT (event),
715 GST_EVENT_SEEK_ENDOFFSET (event), &format, &position)) {
716 /* could not convert seek format to time offset */
721 dvdec->end_position = position;
722 dvdec->loop = GST_EVENT_SEEK_TYPE (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
729 /* first bring the format to time */
730 format = GST_FORMAT_TIME;
731 if (!gst_pad_convert (pad,
732 GST_EVENT_SEEK_FORMAT (event),
733 GST_EVENT_SEEK_OFFSET (event), &format, &position)) {
734 /* could not convert seek format to time offset */
738 dvdec->next_ts = position;
739 /* then try to figure out the byteoffset for this time */
740 format = GST_FORMAT_BYTES;
741 if (!gst_pad_convert (dvdec->sinkpad, GST_FORMAT_TIME, position,
742 &format, &position)) {
743 /* could not convert seek format to byte offset */
748 if (!gst_bytestream_seek (dvdec->bs, position, GST_SEEK_METHOD_SET)) {
751 if (GST_EVENT_TYPE (event) != GST_EVENT_SEEK_SEGMENT)
752 dvdec->end_position = -1;
759 gst_event_unref (event);
764 gst_dvdec_video_getcaps (GstPad * pad)
768 GstPadTemplate *src_pad_template;
770 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
771 src_pad_template = gst_static_pad_template_get (&video_src_temp);
772 caps = gst_caps_copy (gst_pad_template_get_caps (src_pad_template));
774 if (dvdec->found_header) {
780 par_x = PAL_WIDE_PAR_X;
781 par_y = PAL_WIDE_PAR_Y;
783 par_x = PAL_NORMAL_PAR_X;
784 par_y = PAL_NORMAL_PAR_Y;
788 par_x = NTSC_WIDE_PAR_X;
789 par_y = NTSC_WIDE_PAR_Y;
791 par_x = NTSC_NORMAL_PAR_X;
792 par_y = NTSC_NORMAL_PAR_Y;
796 for (i = 0; i < gst_caps_get_size (caps); i++) {
797 GstStructure *structure = gst_caps_get_structure (caps, i);
799 gst_structure_set (structure,
800 "height", G_TYPE_INT, dvdec->height,
801 "framerate", G_TYPE_DOUBLE, dvdec->framerate / dvdec->drop_factor,
802 "pixel-aspect-ratio", GST_TYPE_FRACTION, par_x, par_y, NULL);
809 static GstPadLinkReturn
810 gst_dvdec_video_link (GstPad * pad, const GstCaps * caps)
813 GstStructure *structure;
818 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
820 /* if we did not find a header yet, return delayed */
821 if (!dvdec->found_header) {
822 return GST_PAD_LINK_DELAYED;
825 structure = gst_caps_get_structure (caps, 0);
827 if (!gst_structure_get_int (structure, "height", &height) ||
828 !gst_structure_get_double (structure, "framerate", &framerate))
829 return GST_PAD_LINK_REFUSED;
831 /* allow a margin of error for the framerate caused by float rounding errors */
832 if ((height != dvdec->height) ||
833 (fabs (framerate - (dvdec->framerate / dvdec->drop_factor)) > 0.00000001))
834 return GST_PAD_LINK_REFUSED;
836 if (strcmp (gst_structure_get_name (structure), "video/x-raw-rgb") == 0) {
839 gst_structure_get_int (structure, "bpp", &bpp);
841 dvdec->space = e_dv_color_rgb;
844 dvdec->space = e_dv_color_bgr0;
848 if (!gst_structure_get_fourcc (structure, "format", &fourcc))
849 return GST_PAD_LINK_REFUSED;
851 dvdec->space = e_dv_color_yuv;
855 return GST_PAD_LINK_OK;
859 gst_dvdec_push (GstDVDec * dvdec, GstBuffer * outbuf, GstPad * pad,
862 if ((dvdec->need_discont) || (dvdec->new_media)) {
865 discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, ts, NULL);
866 GST_EVENT_DISCONT_NEW_MEDIA (discont) = dvdec->new_media;
868 gst_pad_push (pad, GST_DATA (discont));
871 gst_pad_push (pad, GST_DATA (outbuf));
873 if ((dvdec->end_position != -1) && (dvdec->next_ts >= dvdec->end_position)) {
875 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_SEGMENT_DONE)));
877 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
882 gst_dvdec_loop (GstElement * element)
885 GstBuffer *buf, *outbuf;
888 guint32 length, got_bytes;
889 GstClockTime ts, duration;
893 dvdec = GST_DVDEC (element);
896 * Apparently dv_parse_header can read from the body of the frame
897 * too, so it needs more than header_size bytes. Wacky!
899 if (dvdec->found_header)
900 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
902 length = NTSC_BUFFER;
904 /* first read enough bytes to parse the header */
905 got_bytes = gst_bytestream_peek_bytes (dvdec->bs, &inframe, length);
906 if (got_bytes < length) {
907 gst_dvdec_handle_sink_event (dvdec);
910 if (dv_parse_header (dvdec->decoder, inframe) < 0) {
911 GST_ELEMENT_ERROR (dvdec, STREAM, DECODE, (NULL), (NULL));
915 /* after parsing the header we know the length of the data */
916 dvdec->PAL = dv_system_50_fields (dvdec->decoder);
917 dvdec->found_header = TRUE;
919 fps = (dvdec->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE);
920 height = (dvdec->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
921 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
922 wide = dv_format_wide (dvdec->decoder);
924 if (length != dvdec->length) {
925 dvdec->length = length;
926 gst_bytestream_size_hint (dvdec->bs, length);
929 /* then read the read data */
930 got_bytes = gst_bytestream_read (dvdec->bs, &buf, length);
931 if (got_bytes < length) {
932 gst_dvdec_handle_sink_event (dvdec);
937 dvdec->next_ts += GST_SECOND / fps;
938 duration = dvdec->next_ts - ts;
940 dv_parse_packs (dvdec->decoder, GST_BUFFER_DATA (buf));
941 if (dv_is_new_recording (dvdec->decoder, GST_BUFFER_DATA (buf)))
942 dvdec->new_media = TRUE;
943 if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
946 dv_decode_full_audio (dvdec->decoder, GST_BUFFER_DATA (buf),
947 dvdec->audio_buffers);
949 if ((dv_get_frequency (dvdec->decoder) != dvdec->frequency) ||
950 (dv_get_num_channels (dvdec->decoder) != dvdec->channels)) {
951 if (!gst_pad_set_explicit_caps (dvdec->audiosrcpad,
952 gst_caps_new_simple ("audio/x-raw-int",
953 "rate", G_TYPE_INT, dv_get_frequency (dvdec->decoder),
954 "depth", G_TYPE_INT, 16,
955 "width", G_TYPE_INT, 16,
956 "signed", G_TYPE_BOOLEAN, TRUE,
957 "channels", G_TYPE_INT, dv_get_num_channels (dvdec->decoder),
958 "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, NULL))) {
959 gst_buffer_unref (buf);
960 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL),
961 ("Failed to negotiate audio parameters for the DV audio stream"));
965 dvdec->frequency = dv_get_frequency (dvdec->decoder);
966 dvdec->channels = dv_get_num_channels (dvdec->decoder);
969 num_samples = dv_get_num_samples (dvdec->decoder);
975 outbuf = gst_buffer_new ();
976 GST_BUFFER_SIZE (outbuf) = dv_get_num_samples (dvdec->decoder) *
977 sizeof (gint16) * dv_get_num_channels (dvdec->decoder);
978 GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
980 a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
982 for (i = 0; i < num_samples; i++) {
983 for (j = 0; j < dv_get_num_channels (dvdec->decoder); j++) {
984 *(a_ptr++) = dvdec->audio_buffers[j][i];
988 GST_BUFFER_TIMESTAMP (outbuf) = ts;
989 GST_BUFFER_DURATION (outbuf) = duration;
990 GST_BUFFER_OFFSET (outbuf) = dvdec->audio_offset;
991 dvdec->audio_offset += num_samples;
992 GST_BUFFER_OFFSET_END (outbuf) = dvdec->audio_offset;
994 gst_dvdec_push (dvdec, outbuf, dvdec->audiosrcpad, ts);
997 dvdec->frequency = dv_get_frequency (dvdec->decoder);
998 dvdec->channels = dv_get_num_channels (dvdec->decoder);
1001 if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
1003 guint8 *outframe_ptrs[3];
1004 gint outframe_pitches[3];
1006 dvdec->framecount++;
1007 if (dvdec->framecount < dvdec->drop_factor) {
1011 dvdec->framecount = 0;
1013 if ((dvdec->framerate != fps) || (dvdec->height != height)
1014 || dvdec->wide != wide) {
1015 dvdec->height = height;
1016 dvdec->framerate = fps;
1019 if (GST_PAD_LINK_FAILED (gst_pad_renegotiate (dvdec->videosrcpad))) {
1020 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL), (NULL));
1025 outbuf = gst_buffer_new_and_alloc ((720 * height) * dvdec->bpp);
1027 outframe = GST_BUFFER_DATA (outbuf);
1029 outframe_ptrs[0] = outframe;
1030 outframe_pitches[0] = 720 * dvdec->bpp;
1032 /* the rest only matters for YUY2 */
1033 if (dvdec->bpp < 3) {
1034 outframe_ptrs[1] = outframe_ptrs[0] + 720 * height;
1035 outframe_ptrs[2] = outframe_ptrs[1] + 360 * height;
1037 outframe_pitches[1] = height / 2;
1038 outframe_pitches[2] = outframe_pitches[1];
1041 dv_decode_full_frame (dvdec->decoder, GST_BUFFER_DATA (buf),
1042 dvdec->space, outframe_ptrs, outframe_pitches);
1044 GST_BUFFER_TIMESTAMP (outbuf) = ts;
1045 GST_BUFFER_DURATION (outbuf) = duration * dvdec->drop_factor;
1047 gst_dvdec_push (dvdec, outbuf, dvdec->videosrcpad, ts);
1049 dvdec->height = height;
1050 dvdec->framerate = fps;
1055 if ((dvdec->end_position != -1) &&
1056 (dvdec->next_ts >= dvdec->end_position) && !dvdec->loop) {
1057 gst_element_set_eos (GST_ELEMENT (dvdec));
1060 dvdec->need_discont = FALSE;
1061 dvdec->new_media = FALSE;
1063 gst_buffer_unref (buf);
1066 static GstElementStateReturn
1067 gst_dvdec_change_state (GstElement * element)
1069 GstDVDec *dvdec = GST_DVDEC (element);
1071 switch (GST_STATE_TRANSITION (element)) {
1072 case GST_STATE_NULL_TO_READY:
1074 case GST_STATE_READY_TO_PAUSED:
1075 dvdec->bs = gst_bytestream_new (dvdec->sinkpad);
1077 dv_decoder_new (0, dvdec->clamp_luma, dvdec->clamp_chroma);
1078 dvdec->decoder->quality = qualities[dvdec->quality];
1079 dvdec->audio_offset = 0;
1080 dvdec->framecount = 0;
1082 * Enable this function call when libdv2 0.100 or higher is more
1085 /* dv_set_quality (dvdec->decoder, qualities [dvdec->quality]); */
1087 case GST_STATE_PAUSED_TO_PLAYING:
1089 case GST_STATE_PLAYING_TO_PAUSED:
1091 case GST_STATE_PAUSED_TO_READY:
1092 dv_decoder_free (dvdec->decoder);
1093 dvdec->decoder = NULL;
1094 dvdec->found_header = FALSE;
1095 gst_bytestream_destroy (dvdec->bs);
1098 case GST_STATE_READY_TO_NULL:
1104 return parent_class->change_state (element);
1107 /* Arguments are part of the Gtk+ object system, and these functions
1108 * enable the element to respond to various arguments.
1111 gst_dvdec_set_property (GObject * object, guint prop_id, const GValue * value,
1116 /* It's not null if we got it, but it might not be ours */
1117 g_return_if_fail (GST_IS_DVDEC (object));
1119 /* Get a pointer of the right type. */
1120 dvdec = GST_DVDEC (object);
1122 /* Check the argument id to see which argument we're setting. */
1124 case ARG_CLAMP_LUMA:
1125 dvdec->clamp_luma = g_value_get_boolean (value);
1127 case ARG_CLAMP_CHROMA:
1128 dvdec->clamp_chroma = g_value_get_boolean (value);
1131 dvdec->quality = g_value_get_enum (value);
1132 if ((dvdec->quality < 0) || (dvdec->quality > 5))
1135 case ARG_DECODE_NTH:
1136 dvdec->drop_factor = g_value_get_int (value);
1139 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1144 /* The set function is simply the inverse of the get fuction. */
1146 gst_dvdec_get_property (GObject * object, guint prop_id, GValue * value,
1151 /* It's not null if we got it, but it might not be ours */
1152 g_return_if_fail (GST_IS_DVDEC (object));
1153 dvdec = GST_DVDEC (object);
1156 case ARG_CLAMP_LUMA:
1157 g_value_set_boolean (value, dvdec->clamp_luma);
1159 case ARG_CLAMP_CHROMA:
1160 g_value_set_boolean (value, dvdec->clamp_chroma);
1163 g_value_set_enum (value, dvdec->quality);
1165 case ARG_DECODE_NTH:
1166 g_value_set_int (value, dvdec->drop_factor);
1169 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1174 /* This is the entry into the plugin itself. When the plugin loads,
1175 * this function is called to register everything that the plugin provides.
1178 plugin_init (GstPlugin * plugin)
1180 if (!gst_library_load ("gstbytestream"))
1183 if (!gst_element_register (plugin, "dvdec", GST_RANK_PRIMARY,
1184 gst_dvdec_get_type ()))
1190 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1193 "Uses libdv to decode DV video (libdv.sourceforge.net)",
1194 plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN);