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 /* The ElementDetails structure gives a human-readable description
39 * of the plugin, as well as author and version data.
41 static GstElementDetails dvdec_details =
42 GST_ELEMENT_DETAILS ("DV (smpte314) decoder plugin",
43 "Codec/Decoder/Video",
44 "Uses libdv to decode DV video (libdv.sourceforge.net)",
45 "Erik Walthinsen <omega@cse.ogi.edu>\n" "Wim Taymans <wim.taymans@tvd.be>");
48 /* These are the signals that this element can fire. They are zero-
49 * based because the numbers themselves are private to the object.
50 * LAST_SIGNAL is used for initialization of the signal array.
58 /* Arguments are identified the same way, but cannot be zero, so you
59 * must leave the ARG_0 entry in as a placeholder.
70 const gint qualities[] = {
74 DV_QUALITY_DC | DV_QUALITY_COLOR,
75 DV_QUALITY_AC_1 | DV_QUALITY_COLOR,
76 DV_QUALITY_AC_2 | DV_QUALITY_COLOR
79 #define DV_QUALITY_DEFAULT 5
81 /* The PadFactory structures describe what pads the element has or
82 * can have. They can be quite complex, but for this dvdec plugin
83 * they are rather simple.
85 static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
88 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true")
91 static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video",
94 GST_STATIC_CAPS ("video/x-raw-yuv, "
95 "format = (fourcc) YUY2, "
98 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
100 "framerate = (double) { "
101 G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
106 "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", "
107 "red_mask = (int) 0x00ff0000, "
108 "green_mask = (int) 0x0000ff00, "
109 "blue_mask = (int) 0x000000ff, "
110 "width = (int) 720, "
112 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
114 "framerate = (double) { "
115 G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
120 "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", "
121 "red_mask = (int) 0x00ff0000, "
122 "green_mask = (int) 0x0000ff00, "
123 "blue_mask = (int) 0x000000ff, "
124 "width = (int) 720, "
126 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
128 "framerate = (double) { "
129 G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
133 static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
136 GST_STATIC_CAPS ("audio/x-raw-int, "
139 "signed = (boolean) TRUE, "
140 "channels = (int) 2, "
141 "endianness = (int) " G_STRINGIFY (G_LITTLE_ENDIAN) ", "
142 "rate = (int) [ 4000, 48000 ]")
145 #define GST_TYPE_DVDEC_QUALITY (gst_dvdec_quality_get_type())
147 gst_dvdec_quality_get_type (void)
149 static GType qtype = 0;
152 static const GEnumValue values[] = {
153 {0, "DV_QUALITY_FASTEST", "Fastest decoding, low-quality mono"},
154 {1, "DV_QUALITY_AC_1", "Mono decoding using the first AC coefficient"},
155 {2, "DV_QUALITY_AC_2", "Highest quality mono decoding"},
156 {3, "DV_QUALITY_DC|DV_QUALITY_COLOUR", "Fastest colour decoding"},
157 {4, "DV_QUALITY_AC_1|DV_QUALITY_COLOUR",
158 "Colour, using only the first AC coefficient"},
159 {5, "DV_QUALITY_BEST", "Highest quality colour decoding"},
163 qtype = g_enum_register_static ("GstDVDecQualityEnum", values);
168 /* A number of functon prototypes are given so we can refer to them later. */
169 static void gst_dvdec_base_init (gpointer g_class);
170 static void gst_dvdec_class_init (GstDVDecClass * klass);
171 static void gst_dvdec_init (GstDVDec * dvdec);
173 static const GstQueryType *gst_dvdec_get_src_query_types (GstPad * pad);
174 static gboolean gst_dvdec_src_query (GstPad * pad, GstQueryType type,
175 GstFormat * format, gint64 * value);
176 static const GstFormat *gst_dvdec_get_formats (GstPad * pad);
177 static gboolean gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format,
178 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
179 static gboolean gst_dvdec_src_convert (GstPad * pad, GstFormat src_format,
180 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
182 static GstPadLinkReturn gst_dvdec_video_link (GstPad * pad,
183 const GstCaps * caps);
184 static GstCaps *gst_dvdec_video_getcaps (GstPad * pad);
186 static const GstEventMask *gst_dvdec_get_event_masks (GstPad * pad);
187 static gboolean gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event);
189 static void gst_dvdec_loop (GstElement * element);
191 static GstElementStateReturn gst_dvdec_change_state (GstElement * element);
193 static void gst_dvdec_set_property (GObject * object, guint prop_id,
194 const GValue * value, GParamSpec * pspec);
195 static void gst_dvdec_get_property (GObject * object, guint prop_id,
196 GValue * value, GParamSpec * pspec);
198 /* The parent class pointer needs to be kept around for some object
201 static GstElementClass *parent_class = NULL;
203 /* This array holds the ids of the signals registered for this object.
204 * The array indexes are based on the enum up above.
206 /*static guint gst_dvdec_signals[LAST_SIGNAL] = { 0 }; */
208 /* This function is used to register and subsequently return the type
209 * identifier for this object class. On first invocation, it will
210 * register the type, providing the name of the class, struct sizes,
211 * and pointers to the various functions that define the class.
214 gst_dvdec_get_type (void)
216 static GType dvdec_type = 0;
219 static const GTypeInfo dvdec_info = {
220 sizeof (GstDVDecClass),
223 (GClassInitFunc) gst_dvdec_class_init,
228 (GInstanceInitFunc) gst_dvdec_init,
232 g_type_register_static (GST_TYPE_ELEMENT, "GstDVDec", &dvdec_info, 0);
238 gst_dvdec_base_init (gpointer g_class)
240 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
242 /* The pad templates can be easily generated from the factories above,
243 * and then added to the list of padtemplates for the elementfactory.
244 * Note that the generated padtemplates are stored in static global
245 * variables, for the gst_dvdec_init function to use later on.
247 gst_element_class_add_pad_template (element_class,
248 gst_static_pad_template_get (&sink_temp));
249 gst_element_class_add_pad_template (element_class,
250 gst_static_pad_template_get (&video_src_temp));
251 gst_element_class_add_pad_template (element_class,
252 gst_static_pad_template_get (&audio_src_temp));
254 gst_element_class_set_details (element_class, &dvdec_details);
257 /* In order to create an instance of an object, the class must be
258 * initialized by this function. GObject will take care of running
259 * it, based on the pointer to the function provided above.
262 gst_dvdec_class_init (GstDVDecClass * klass)
264 /* Class pointers are needed to supply pointers to the private
265 * implementations of parent class methods.
267 GObjectClass *gobject_class;
268 GstElementClass *gstelement_class;
270 /* Since the dvdec class contains the parent classes, you can simply
271 * cast the pointer to get access to the parent classes.
273 gobject_class = (GObjectClass *) klass;
274 gstelement_class = (GstElementClass *) klass;
276 /* The parent class is needed for class method overrides. */
277 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
279 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_LUMA,
280 g_param_spec_boolean ("clamp_luma", "Clamp luma", "Clamp luma",
281 FALSE, G_PARAM_READWRITE));
282 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_CHROMA,
283 g_param_spec_boolean ("clamp_chroma", "Clamp chroma", "Clamp chroma",
284 FALSE, G_PARAM_READWRITE));
285 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY,
286 g_param_spec_enum ("quality", "Quality", "Decoding quality",
287 GST_TYPE_DVDEC_QUALITY, DV_QUALITY_DEFAULT, G_PARAM_READWRITE));
289 gobject_class->set_property = gst_dvdec_set_property;
290 gobject_class->get_property = gst_dvdec_get_property;
292 gstelement_class->change_state = gst_dvdec_change_state;
294 /* table initialization, only do once */
298 /* This function is responsible for initializing a specific instance of
302 gst_dvdec_init (GstDVDec * dvdec)
306 dvdec->found_header = FALSE;
309 gst_pad_new_from_template (gst_static_pad_template_get (&sink_temp),
311 gst_pad_set_query_function (dvdec->sinkpad, NULL);
312 gst_pad_set_convert_function (dvdec->sinkpad,
313 GST_DEBUG_FUNCPTR (gst_dvdec_sink_convert));
314 gst_pad_set_formats_function (dvdec->sinkpad,
315 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
316 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->sinkpad);
319 gst_pad_new_from_template (gst_static_pad_template_get (&video_src_temp),
321 gst_pad_set_query_function (dvdec->videosrcpad,
322 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
323 gst_pad_set_query_type_function (dvdec->videosrcpad,
324 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
325 gst_pad_set_event_function (dvdec->videosrcpad,
326 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
327 gst_pad_set_event_mask_function (dvdec->videosrcpad,
328 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
329 gst_pad_set_convert_function (dvdec->videosrcpad,
330 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
331 gst_pad_set_formats_function (dvdec->videosrcpad,
332 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
333 gst_pad_set_getcaps_function (dvdec->videosrcpad,
334 GST_DEBUG_FUNCPTR (gst_dvdec_video_getcaps));
335 gst_pad_set_link_function (dvdec->videosrcpad,
336 GST_DEBUG_FUNCPTR (gst_dvdec_video_link));
337 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->videosrcpad);
340 gst_pad_new_from_template (gst_static_pad_template_get (&audio_src_temp),
342 gst_pad_set_query_function (dvdec->audiosrcpad,
343 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
344 gst_pad_set_query_type_function (dvdec->audiosrcpad,
345 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
346 gst_pad_set_event_function (dvdec->audiosrcpad,
347 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
348 gst_pad_set_event_mask_function (dvdec->audiosrcpad,
349 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
350 gst_pad_set_convert_function (dvdec->audiosrcpad,
351 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
352 gst_pad_set_formats_function (dvdec->audiosrcpad,
353 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
354 gst_pad_use_explicit_caps (dvdec->audiosrcpad);
355 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->audiosrcpad);
357 gst_element_set_loop_function (GST_ELEMENT (dvdec), gst_dvdec_loop);
361 dvdec->next_ts = 0LL;
362 dvdec->end_position = -1LL;
363 dvdec->need_discont = FALSE;
364 dvdec->new_media = FALSE;
365 dvdec->framerate = 0;
367 dvdec->frequency = 0;
370 dvdec->clamp_luma = FALSE;
371 dvdec->clamp_chroma = FALSE;
372 dvdec->quality = DV_QUALITY_BEST;
375 for (i = 0; i < 4; i++) {
376 dvdec->audio_buffers[i] =
377 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
381 static const GstFormat *
382 gst_dvdec_get_formats (GstPad * pad)
384 static const GstFormat src_formats[] = {
390 static const GstFormat sink_formats[] = {
397 return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
401 gst_dvdec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
402 GstFormat * dest_format, gint64 * dest_value)
407 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
408 if (dvdec->length == 0)
411 if (dvdec->decoder == NULL)
414 switch (src_format) {
415 case GST_FORMAT_BYTES:
416 switch (*dest_format) {
417 case GST_FORMAT_BYTES:
418 *dest_value = src_value;
420 case GST_FORMAT_DEFAULT:
421 case GST_FORMAT_TIME:
422 *dest_format = GST_FORMAT_TIME;
423 if (pad == dvdec->videosrcpad)
424 *dest_value = src_value * GST_SECOND /
425 (720 * dvdec->height * dvdec->bpp * dvdec->framerate /
427 else if (pad == dvdec->audiosrcpad)
428 *dest_value = src_value * GST_SECOND /
429 (2 * dvdec->frequency * dvdec->channels);
435 case GST_FORMAT_TIME:
436 switch (*dest_format) {
437 case GST_FORMAT_BYTES:
438 if (pad == dvdec->videosrcpad)
439 *dest_value = src_value * 720 * dvdec->height * dvdec->bpp *
440 dvdec->framerate / GST_SECOND;
441 else if (pad == dvdec->audiosrcpad)
442 *dest_value = 2 * src_value * dvdec->frequency *
443 dvdec->channels / GST_SECOND;
445 case GST_FORMAT_TIME:
446 case GST_FORMAT_DEFAULT:
447 *dest_format = GST_FORMAT_TIME;
448 *dest_value = src_value;
461 gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
462 GstFormat * dest_format, gint64 * dest_value)
467 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
469 if (dvdec->length == 0)
472 if (*dest_format == GST_FORMAT_DEFAULT)
473 *dest_format = GST_FORMAT_TIME;
475 switch (src_format) {
476 case GST_FORMAT_BYTES:
477 switch (*dest_format) {
478 case GST_FORMAT_TIME:
482 /* get frame number */
483 frame = src_value / dvdec->length;
485 *dest_value = (frame * GST_SECOND) / dvdec->framerate;
488 case GST_FORMAT_BYTES:
489 *dest_value = src_value;
495 case GST_FORMAT_TIME:
496 switch (*dest_format) {
497 case GST_FORMAT_BYTES:
501 /* calculate the frame */
502 frame = src_value * dvdec->framerate / GST_SECOND;
503 /* calculate the offset */
504 *dest_value = frame * dvdec->length;
507 case GST_FORMAT_TIME:
508 *dest_value = src_value;
520 static const GstQueryType *
521 gst_dvdec_get_src_query_types (GstPad * pad)
523 static const GstQueryType src_query_types[] = {
529 return src_query_types;
533 gst_dvdec_src_query (GstPad * pad, GstQueryType type,
534 GstFormat * format, gint64 * value)
539 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
542 case GST_QUERY_TOTAL:
547 GstFormat tmp_format;
552 len = gst_bytestream_length (dvdec->bs);
553 tmp_format = GST_FORMAT_TIME;
554 if (len == -1 || !gst_pad_convert (dvdec->sinkpad,
555 GST_FORMAT_BYTES, len, &tmp_format, value)) {
558 if (!gst_pad_convert (pad, GST_FORMAT_TIME, *value, format, value)) {
565 case GST_QUERY_POSITION:
569 gst_pad_convert (pad, GST_FORMAT_TIME, dvdec->next_ts, format,
581 static const GstEventMask *
582 gst_dvdec_get_event_masks (GstPad * pad)
584 static const GstEventMask src_event_masks[] = {
585 {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
588 static const GstEventMask sink_event_masks[] = {
590 {GST_EVENT_DISCONTINUOUS, 0},
591 {GST_EVENT_FLUSH, 0},
595 return (GST_PAD_IS_SRC (pad) ? src_event_masks : sink_event_masks);
599 gst_dvdec_handle_sink_event (GstDVDec * dvdec)
605 gst_bytestream_get_status (dvdec->bs, &remaining, &event);
607 type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
610 case GST_EVENT_FLUSH:
612 case GST_EVENT_FILLER:
614 /* Forward the event to output sinks */
615 if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
616 gst_event_ref (event);
617 gst_pad_push (dvdec->videosrcpad, GST_DATA (event));
619 if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
620 gst_event_ref (event);
621 gst_pad_push (dvdec->audiosrcpad, GST_DATA (event));
625 case GST_EVENT_DISCONTINUOUS:
628 gboolean found = FALSE;
631 format = GST_FORMAT_TIME;
632 /* try to get a timestamp from the discont formats */
633 for (i = 0; i < GST_EVENT_DISCONT_OFFSET_LEN (event); i++) {
634 if (gst_pad_convert (dvdec->sinkpad,
635 GST_EVENT_DISCONT_OFFSET (event, i).format,
636 GST_EVENT_DISCONT_OFFSET (event, i).value,
637 &format, &dvdec->next_ts)) {
644 dvdec->next_ts = 0LL;
646 dvdec->need_discont = TRUE;
650 return gst_pad_event_default (dvdec->sinkpad, event);
653 gst_event_unref (event);
658 gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event)
663 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
665 switch (GST_EVENT_TYPE (event)) {
666 case GST_EVENT_SEEK_SEGMENT:
671 /* first bring the format to time */
672 format = GST_FORMAT_TIME;
673 if (!gst_pad_convert (pad,
674 GST_EVENT_SEEK_FORMAT (event),
675 GST_EVENT_SEEK_ENDOFFSET (event), &format, &position)) {
676 /* could not convert seek format to time offset */
681 dvdec->end_position = position;
682 dvdec->loop = GST_EVENT_SEEK_TYPE (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
689 /* first bring the format to time */
690 format = GST_FORMAT_TIME;
691 if (!gst_pad_convert (pad,
692 GST_EVENT_SEEK_FORMAT (event),
693 GST_EVENT_SEEK_OFFSET (event), &format, &position)) {
694 /* could not convert seek format to time offset */
698 dvdec->next_ts = position;
699 /* then try to figure out the byteoffset for this time */
700 format = GST_FORMAT_BYTES;
701 if (!gst_pad_convert (dvdec->sinkpad, GST_FORMAT_TIME, position,
702 &format, &position)) {
703 /* could not convert seek format to byte offset */
708 if (!gst_bytestream_seek (dvdec->bs, position, GST_SEEK_METHOD_SET)) {
711 if (GST_EVENT_TYPE (event) != GST_EVENT_SEEK_SEGMENT)
712 dvdec->end_position = -1;
719 gst_event_unref (event);
724 gst_dvdec_video_getcaps (GstPad * pad)
728 GstPadTemplate *src_pad_template;
730 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
731 src_pad_template = gst_static_pad_template_get (&video_src_temp);
732 caps = gst_caps_copy (gst_pad_template_get_caps (src_pad_template));
734 if (dvdec->found_header) {
738 for (i = 0; i < gst_caps_get_size (caps); i++) {
739 GstStructure *structure = gst_caps_get_structure (caps, i);
741 gst_structure_set (structure,
742 "height", G_TYPE_INT, dvdec->height,
743 "framerate", G_TYPE_DOUBLE, dvdec->framerate, NULL);
750 static GstPadLinkReturn
751 gst_dvdec_video_link (GstPad * pad, const GstCaps * caps)
754 GstStructure *structure;
759 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
761 /* if we did not find a header yet, return delayed */
762 if (!dvdec->found_header) {
763 return GST_PAD_LINK_DELAYED;
766 structure = gst_caps_get_structure (caps, 0);
768 if (!gst_structure_get_int (structure, "height", &height) ||
769 !gst_structure_get_double (structure, "framerate", &framerate))
770 return GST_PAD_LINK_REFUSED;
772 if ((height != dvdec->height) || (framerate != dvdec->framerate))
773 return GST_PAD_LINK_REFUSED;
775 if (strcmp (gst_structure_get_name (structure), "video/x-raw-rgb") == 0) {
778 gst_structure_get_int (structure, "bpp", &bpp);
780 dvdec->space = e_dv_color_rgb;
783 dvdec->space = e_dv_color_bgr0;
787 if (!gst_structure_get_fourcc (structure, "format", &fourcc))
788 return GST_PAD_LINK_REFUSED;
790 dvdec->space = e_dv_color_yuv;
794 return GST_PAD_LINK_OK;
798 gst_dvdec_push (GstDVDec * dvdec, GstBuffer * outbuf, GstPad * pad,
801 if ((dvdec->need_discont) || (dvdec->new_media)) {
804 discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, ts, NULL);
805 GST_EVENT_DISCONT_NEW_MEDIA (discont) = dvdec->new_media;
807 gst_pad_push (pad, GST_DATA (discont));
810 gst_pad_push (pad, GST_DATA (outbuf));
812 if ((dvdec->end_position != -1) && (dvdec->next_ts >= dvdec->end_position)) {
814 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_SEGMENT_DONE)));
816 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
821 gst_dvdec_loop (GstElement * element)
824 GstBuffer *buf, *outbuf;
827 guint32 length, got_bytes;
828 GstClockTime ts, duration;
831 dvdec = GST_DVDEC (element);
834 * Apparently dv_parse_header can read from the body of the frame
835 * too, so it needs more than header_size bytes. Wacky!
837 if (dvdec->found_header)
838 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
840 length = NTSC_BUFFER;
842 /* first read enough bytes to parse the header */
843 got_bytes = gst_bytestream_peek_bytes (dvdec->bs, &inframe, length);
844 if (got_bytes < length) {
845 gst_dvdec_handle_sink_event (dvdec);
848 if (dv_parse_header (dvdec->decoder, inframe) < 0) {
849 GST_ELEMENT_ERROR (dvdec, STREAM, DECODE, (NULL), (NULL));
853 /* after parsing the header we know the length of the data */
854 dvdec->PAL = dv_system_50_fields (dvdec->decoder);
855 dvdec->found_header = TRUE;
857 fps = (dvdec->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE);
858 height = (dvdec->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
859 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
861 if (length != dvdec->length) {
862 dvdec->length = length;
863 gst_bytestream_size_hint (dvdec->bs, length);
866 /* then read the read data */
867 got_bytes = gst_bytestream_read (dvdec->bs, &buf, length);
868 if (got_bytes < length) {
869 gst_dvdec_handle_sink_event (dvdec);
874 dvdec->next_ts += GST_SECOND / dvdec->framerate;
875 duration = dvdec->next_ts - ts;
877 dv_parse_packs (dvdec->decoder, GST_BUFFER_DATA (buf));
878 if (dv_is_new_recording (dvdec->decoder, GST_BUFFER_DATA (buf)))
879 dvdec->new_media = TRUE;
880 if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
883 dv_decode_full_audio (dvdec->decoder, GST_BUFFER_DATA (buf),
884 dvdec->audio_buffers);
886 if ((dv_get_frequency (dvdec->decoder) != dvdec->frequency) ||
887 (dv_get_num_channels (dvdec->decoder) != dvdec->channels)) {
888 if (!gst_pad_set_explicit_caps (dvdec->audiosrcpad,
889 gst_caps_new_simple ("audio/x-raw-int",
890 "rate", G_TYPE_INT, dv_get_frequency (dvdec->decoder),
891 "depth", G_TYPE_INT, 16,
892 "width", G_TYPE_INT, 16,
893 "signed", G_TYPE_BOOLEAN, TRUE,
894 "channels", G_TYPE_INT, dv_get_num_channels (dvdec->decoder),
895 "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, NULL))) {
896 gst_buffer_unref (buf);
897 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL),
898 ("Failed to negotiate audio parameters for the DV audio stream"));
902 dvdec->frequency = dv_get_frequency (dvdec->decoder);
903 dvdec->channels = dv_get_num_channels (dvdec->decoder);
906 num_samples = dv_get_num_samples (dvdec->decoder);
912 outbuf = gst_buffer_new ();
913 GST_BUFFER_SIZE (outbuf) = dv_get_num_samples (dvdec->decoder) *
914 sizeof (gint16) * dv_get_num_channels (dvdec->decoder);
915 GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
917 a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
919 for (i = 0; i < num_samples; i++) {
920 for (j = 0; j < dv_get_num_channels (dvdec->decoder); j++) {
921 *(a_ptr++) = dvdec->audio_buffers[j][i];
925 GST_BUFFER_TIMESTAMP (outbuf) = ts;
926 GST_BUFFER_DURATION (outbuf) = duration;
927 GST_BUFFER_OFFSET (outbuf) = dvdec->audio_offset;
928 dvdec->audio_offset += num_samples;
929 GST_BUFFER_OFFSET_END (outbuf) = dvdec->audio_offset;
931 gst_dvdec_push (dvdec, outbuf, dvdec->audiosrcpad, ts);
934 dvdec->frequency = dv_get_frequency (dvdec->decoder);
935 dvdec->channels = dv_get_num_channels (dvdec->decoder);
938 if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
940 guint8 *outframe_ptrs[3];
941 gint outframe_pitches[3];
943 if ((dvdec->framerate != fps) || (dvdec->height != height)) {
944 dvdec->height = height;
945 dvdec->framerate = fps;
947 if (GST_PAD_LINK_FAILED (gst_pad_renegotiate (dvdec->videosrcpad))) {
948 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL), (NULL));
953 outbuf = gst_buffer_new_and_alloc ((720 * height) * dvdec->bpp);
955 outframe = GST_BUFFER_DATA (outbuf);
957 outframe_ptrs[0] = outframe;
958 outframe_pitches[0] = 720 * dvdec->bpp;
960 /* the rest only matters for YUY2 */
961 if (dvdec->bpp < 3) {
962 outframe_ptrs[1] = outframe_ptrs[0] + 720 * height;
963 outframe_ptrs[2] = outframe_ptrs[1] + 360 * height;
965 outframe_pitches[1] = height / 2;
966 outframe_pitches[2] = outframe_pitches[1];
969 dv_decode_full_frame (dvdec->decoder, GST_BUFFER_DATA (buf),
970 dvdec->space, outframe_ptrs, outframe_pitches);
972 GST_BUFFER_TIMESTAMP (outbuf) = ts;
973 GST_BUFFER_DURATION (outbuf) = duration;
975 gst_dvdec_push (dvdec, outbuf, dvdec->videosrcpad, ts);
977 dvdec->height = height;
978 dvdec->framerate = fps;
981 if ((dvdec->end_position != -1) &&
982 (dvdec->next_ts >= dvdec->end_position) && !dvdec->loop) {
983 gst_element_set_eos (GST_ELEMENT (dvdec));
986 dvdec->need_discont = FALSE;
987 dvdec->new_media = FALSE;
989 gst_buffer_unref (buf);
992 static GstElementStateReturn
993 gst_dvdec_change_state (GstElement * element)
995 GstDVDec *dvdec = GST_DVDEC (element);
997 switch (GST_STATE_TRANSITION (element)) {
998 case GST_STATE_NULL_TO_READY:
1000 case GST_STATE_READY_TO_PAUSED:
1001 dvdec->bs = gst_bytestream_new (dvdec->sinkpad);
1003 dv_decoder_new (0, dvdec->clamp_luma, dvdec->clamp_chroma);
1004 dvdec->decoder->quality = qualities[dvdec->quality];
1005 dvdec->audio_offset = 0;
1007 * Enable this function call when libdv2 0.100 or higher is more
1010 /* dv_set_quality (dvdec->decoder, qualities [dvdec->quality]); */
1012 case GST_STATE_PAUSED_TO_PLAYING:
1014 case GST_STATE_PLAYING_TO_PAUSED:
1016 case GST_STATE_PAUSED_TO_READY:
1017 dv_decoder_free (dvdec->decoder);
1018 dvdec->decoder = NULL;
1019 dvdec->found_header = FALSE;
1020 gst_bytestream_destroy (dvdec->bs);
1023 case GST_STATE_READY_TO_NULL:
1029 return parent_class->change_state (element);
1032 /* Arguments are part of the Gtk+ object system, and these functions
1033 * enable the element to respond to various arguments.
1036 gst_dvdec_set_property (GObject * object, guint prop_id, const GValue * value,
1041 /* It's not null if we got it, but it might not be ours */
1042 g_return_if_fail (GST_IS_DVDEC (object));
1044 /* Get a pointer of the right type. */
1045 dvdec = GST_DVDEC (object);
1047 /* Check the argument id to see which argument we're setting. */
1049 case ARG_CLAMP_LUMA:
1050 dvdec->clamp_luma = g_value_get_boolean (value);
1052 case ARG_CLAMP_CHROMA:
1053 dvdec->clamp_chroma = g_value_get_boolean (value);
1056 dvdec->quality = g_value_get_enum (value);
1057 if ((dvdec->quality < 0) || (dvdec->quality > 5))
1061 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1066 /* The set function is simply the inverse of the get fuction. */
1068 gst_dvdec_get_property (GObject * object, guint prop_id, GValue * value,
1073 /* It's not null if we got it, but it might not be ours */
1074 g_return_if_fail (GST_IS_DVDEC (object));
1075 dvdec = GST_DVDEC (object);
1078 case ARG_CLAMP_LUMA:
1079 g_value_set_boolean (value, dvdec->clamp_luma);
1081 case ARG_CLAMP_CHROMA:
1082 g_value_set_boolean (value, dvdec->clamp_chroma);
1085 g_value_set_enum (value, dvdec->quality);
1088 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1093 /* This is the entry into the plugin itself. When the plugin loads,
1094 * this function is called to register everything that the plugin provides.
1097 plugin_init (GstPlugin * plugin)
1099 if (!gst_library_load ("gstbytestream"))
1102 if (!gst_element_register (plugin, "dvdec", GST_RANK_PRIMARY,
1103 gst_dvdec_get_type ()))
1109 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1112 "Uses libdv to decode DV video (libdv.sourceforge.net)",
1113 plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN);