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 /* The PadFactory structures describe what pads the element has or
71 * can have. They can be quite complex, but for this dvdec plugin
72 * they are rather simple.
74 static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
77 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) true")
80 static GstStaticPadTemplate video_src_temp = GST_STATIC_PAD_TEMPLATE ("video",
83 GST_STATIC_CAPS ("video/x-raw-yuv, "
84 "format = (fourcc) YUY2, "
87 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
89 "framerate = (double) { "
90 G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
95 "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", "
96 "red_mask = (int) 0x00ff0000, "
97 "green_mask = (int) 0x0000ff00, "
98 "blue_mask = (int) 0x000000ff, "
101 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
103 "framerate = (double) { "
104 G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
109 "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", "
110 "red_mask = (int) 0x00ff0000, "
111 "green_mask = (int) 0x0000ff00, "
112 "blue_mask = (int) 0x000000ff, "
113 "width = (int) 720, "
115 G_STRINGIFY (NTSC_HEIGHT) ", " G_STRINGIFY (PAL_HEIGHT)
117 "framerate = (double) { "
118 G_STRINGIFY (PAL_FRAMERATE) ", " G_STRINGIFY (NTSC_FRAMERATE)
122 static GstStaticPadTemplate audio_src_temp = GST_STATIC_PAD_TEMPLATE ("audio",
125 GST_STATIC_CAPS ("audio/x-raw-int, "
128 "signed = (boolean) TRUE, "
129 "channels = (int) 2, "
130 "endianness = (int) " G_STRINGIFY (G_LITTLE_ENDIAN) ", "
131 "rate = (int) [ 4000, 48000 ]")
134 #define GST_TYPE_DVDEC_QUALITY (gst_dvdec_quality_get_type())
136 gst_dvdec_quality_get_type (void)
138 static GType qtype = 0;
141 static const GFlagsValue values[] = {
142 {DV_QUALITY_COLOR, "DV_QUALITY_COLOR", "Color or monochrome decoding"},
143 {DV_QUALITY_AC_1, "DV_QUALITY_AC_1", "AC 1 something"},
144 {DV_QUALITY_AC_2, "DV_QUALITY_AC_2", "AC 2 something"},
148 qtype = g_flags_register_static ("GstDVDecQualityFlags", values);
153 /* A number of functon prototypes are given so we can refer to them later. */
154 static void gst_dvdec_base_init (gpointer g_class);
155 static void gst_dvdec_class_init (GstDVDecClass * klass);
156 static void gst_dvdec_init (GstDVDec * dvdec);
158 static const GstQueryType *gst_dvdec_get_src_query_types (GstPad * pad);
159 static gboolean gst_dvdec_src_query (GstPad * pad, GstQueryType type,
160 GstFormat * format, gint64 * value);
161 static const GstFormat *gst_dvdec_get_formats (GstPad * pad);
162 static gboolean gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format,
163 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
164 static gboolean gst_dvdec_src_convert (GstPad * pad, GstFormat src_format,
165 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
167 static GstPadLinkReturn gst_dvdec_video_link (GstPad * pad,
168 const GstCaps * caps);
169 static GstCaps *gst_dvdec_video_getcaps (GstPad * pad);
171 static const GstEventMask *gst_dvdec_get_event_masks (GstPad * pad);
172 static gboolean gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event);
174 static void gst_dvdec_loop (GstElement * element);
176 static GstElementStateReturn gst_dvdec_change_state (GstElement * element);
178 static void gst_dvdec_set_property (GObject * object, guint prop_id,
179 const GValue * value, GParamSpec * pspec);
180 static void gst_dvdec_get_property (GObject * object, guint prop_id,
181 GValue * value, GParamSpec * pspec);
183 /* The parent class pointer needs to be kept around for some object
186 static GstElementClass *parent_class = NULL;
188 /* This array holds the ids of the signals registered for this object.
189 * The array indexes are based on the enum up above.
191 /*static guint gst_dvdec_signals[LAST_SIGNAL] = { 0 }; */
193 /* This function is used to register and subsequently return the type
194 * identifier for this object class. On first invocation, it will
195 * register the type, providing the name of the class, struct sizes,
196 * and pointers to the various functions that define the class.
199 gst_dvdec_get_type (void)
201 static GType dvdec_type = 0;
204 static const GTypeInfo dvdec_info = {
205 sizeof (GstDVDecClass),
208 (GClassInitFunc) gst_dvdec_class_init,
213 (GInstanceInitFunc) gst_dvdec_init,
217 g_type_register_static (GST_TYPE_ELEMENT, "GstDVDec", &dvdec_info, 0);
223 gst_dvdec_base_init (gpointer g_class)
225 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
227 /* The pad templates can be easily generated from the factories above,
228 * and then added to the list of padtemplates for the elementfactory.
229 * Note that the generated padtemplates are stored in static global
230 * variables, for the gst_dvdec_init function to use later on.
232 gst_element_class_add_pad_template (element_class,
233 gst_static_pad_template_get (&sink_temp));
234 gst_element_class_add_pad_template (element_class,
235 gst_static_pad_template_get (&video_src_temp));
236 gst_element_class_add_pad_template (element_class,
237 gst_static_pad_template_get (&audio_src_temp));
239 gst_element_class_set_details (element_class, &dvdec_details);
242 /* In order to create an instance of an object, the class must be
243 * initialized by this function. GObject will take care of running
244 * it, based on the pointer to the function provided above.
247 gst_dvdec_class_init (GstDVDecClass * klass)
249 /* Class pointers are needed to supply pointers to the private
250 * implementations of parent class methods.
252 GObjectClass *gobject_class;
253 GstElementClass *gstelement_class;
255 /* Since the dvdec class contains the parent classes, you can simply
256 * cast the pointer to get access to the parent classes.
258 gobject_class = (GObjectClass *) klass;
259 gstelement_class = (GstElementClass *) klass;
261 /* The parent class is needed for class method overrides. */
262 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
264 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_LUMA,
265 g_param_spec_boolean ("clamp_luma", "Clamp luma", "Clamp luma",
266 FALSE, G_PARAM_READWRITE));
267 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_CHROMA,
268 g_param_spec_boolean ("clamp_chroma", "Clamp chroma", "Clamp chroma",
269 FALSE, G_PARAM_READWRITE));
270 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY,
271 g_param_spec_flags ("quality", "Quality", "Decoding quality",
272 GST_TYPE_DVDEC_QUALITY, DV_QUALITY_BEST, G_PARAM_READWRITE));
274 gobject_class->set_property = gst_dvdec_set_property;
275 gobject_class->get_property = gst_dvdec_get_property;
277 gstelement_class->change_state = gst_dvdec_change_state;
279 /* table initialization, only do once */
283 /* This function is responsible for initializing a specific instance of
287 gst_dvdec_init (GstDVDec * dvdec)
291 dvdec->found_header = FALSE;
294 gst_pad_new_from_template (gst_static_pad_template_get (&sink_temp),
296 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->sinkpad);
297 gst_pad_set_query_function (dvdec->sinkpad, NULL);
298 gst_pad_set_convert_function (dvdec->sinkpad,
299 GST_DEBUG_FUNCPTR (gst_dvdec_sink_convert));
300 gst_pad_set_formats_function (dvdec->sinkpad,
301 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
304 gst_pad_new_from_template (gst_static_pad_template_get (&video_src_temp),
306 gst_pad_set_query_function (dvdec->videosrcpad,
307 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
308 gst_pad_set_query_type_function (dvdec->videosrcpad,
309 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
310 gst_pad_set_event_function (dvdec->videosrcpad,
311 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
312 gst_pad_set_event_mask_function (dvdec->videosrcpad,
313 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
314 gst_pad_set_convert_function (dvdec->videosrcpad,
315 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
316 gst_pad_set_formats_function (dvdec->videosrcpad,
317 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
318 gst_pad_set_getcaps_function (dvdec->videosrcpad,
319 GST_DEBUG_FUNCPTR (gst_dvdec_video_getcaps));
320 gst_pad_set_link_function (dvdec->videosrcpad,
321 GST_DEBUG_FUNCPTR (gst_dvdec_video_link));
322 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->videosrcpad);
325 gst_pad_new_from_template (gst_static_pad_template_get (&audio_src_temp),
327 gst_pad_set_query_function (dvdec->audiosrcpad,
328 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
329 gst_pad_set_query_type_function (dvdec->audiosrcpad,
330 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
331 gst_pad_set_event_function (dvdec->audiosrcpad,
332 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
333 gst_pad_set_event_mask_function (dvdec->audiosrcpad,
334 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
335 gst_pad_set_convert_function (dvdec->audiosrcpad,
336 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
337 gst_pad_set_formats_function (dvdec->audiosrcpad,
338 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
339 gst_pad_use_explicit_caps (dvdec->audiosrcpad);
340 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->audiosrcpad);
342 gst_element_set_loop_function (GST_ELEMENT (dvdec), gst_dvdec_loop);
345 dvdec->next_ts = 0LL;
346 dvdec->end_position = -1LL;
347 dvdec->need_discont = FALSE;
348 dvdec->framerate = 0;
350 dvdec->frequency = 0;
353 dvdec->clamp_luma = FALSE;
354 dvdec->clamp_chroma = FALSE;
355 dvdec->quality = DV_QUALITY_BEST;
358 for (i = 0; i < 4; i++) {
359 dvdec->audio_buffers[i] =
360 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
364 static const GstFormat *
365 gst_dvdec_get_formats (GstPad * pad)
367 static const GstFormat src_formats[] = {
373 static const GstFormat sink_formats[] = {
379 return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
383 gst_dvdec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
384 GstFormat * dest_format, gint64 * dest_value)
390 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
392 if (dvdec->length == 0)
395 if (dvdec->decoder == NULL)
398 switch (src_format) {
399 case GST_FORMAT_BYTES:
400 switch (*dest_format) {
401 case GST_FORMAT_TIME:
406 case GST_FORMAT_TIME:
407 switch (*dest_format) {
408 case GST_FORMAT_BYTES:
409 if (pad == dvdec->videosrcpad)
410 scale = 720 * dvdec->height * dvdec->bpp;
411 else if (pad == dvdec->audiosrcpad)
412 scale = dvdec->decoder->audio->num_channels * 2;
414 case GST_FORMAT_DEFAULT:
415 if (pad == dvdec->videosrcpad)
416 *dest_value = src_value * dvdec->framerate * scale / GST_SECOND;
417 else if (pad == dvdec->audiosrcpad)
419 src_value * dvdec->decoder->audio->frequency * scale /
433 gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
434 GstFormat * dest_format, gint64 * dest_value)
439 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
441 if (dvdec->length == 0)
444 switch (src_format) {
445 case GST_FORMAT_BYTES:
446 switch (*dest_format) {
447 case GST_FORMAT_TIME:
451 /* get frame number */
452 frame = src_value / dvdec->length;
454 *dest_value = (frame * GST_SECOND) / dvdec->framerate;
461 case GST_FORMAT_TIME:
462 switch (*dest_format) {
463 case GST_FORMAT_BYTES:
467 /* calculate the frame */
468 frame = src_value * dvdec->framerate / GST_SECOND;
469 /* calculate the offset */
470 *dest_value = frame * dvdec->length;
483 static const GstQueryType *
484 gst_dvdec_get_src_query_types (GstPad * pad)
486 static const GstQueryType src_query_types[] = {
492 return src_query_types;
496 gst_dvdec_src_query (GstPad * pad, GstQueryType type,
497 GstFormat * format, gint64 * value)
502 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
505 case GST_QUERY_TOTAL:
510 GstFormat tmp_format;
512 len = gst_bytestream_length (dvdec->bs);
513 tmp_format = GST_FORMAT_TIME;
514 if (len == -1 || !gst_pad_convert (dvdec->sinkpad,
515 GST_FORMAT_BYTES, len, &tmp_format, value)) {
518 if (!gst_pad_convert (pad, GST_FORMAT_TIME, *value, format, value)) {
525 case GST_QUERY_POSITION:
529 gst_pad_convert (pad, GST_FORMAT_TIME, dvdec->next_ts, format,
541 static const GstEventMask *
542 gst_dvdec_get_event_masks (GstPad * pad)
544 static const GstEventMask src_event_masks[] = {
545 {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
548 static const GstEventMask sink_event_masks[] = {
550 {GST_EVENT_DISCONTINUOUS, 0},
551 {GST_EVENT_FLUSH, 0},
555 return (GST_PAD_IS_SRC (pad) ? src_event_masks : sink_event_masks);
559 gst_dvdec_handle_sink_event (GstDVDec * dvdec)
565 gst_bytestream_get_status (dvdec->bs, &remaining, &event);
567 type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
570 case GST_EVENT_FLUSH:
572 case GST_EVENT_DISCONTINUOUS:
575 gboolean found = FALSE;
578 format = GST_FORMAT_TIME;
579 /* try to get a timestamp from the discont formats */
580 for (i = 0; i < GST_EVENT_DISCONT_OFFSET_LEN (event); i++) {
581 if (gst_pad_convert (dvdec->sinkpad,
582 GST_EVENT_DISCONT_OFFSET (event, i).format,
583 GST_EVENT_DISCONT_OFFSET (event, i).value,
584 &format, &dvdec->next_ts)) {
591 dvdec->next_ts = 0LL;
593 dvdec->need_discont = TRUE;
597 return gst_pad_event_default (dvdec->sinkpad, event);
600 gst_event_unref (event);
605 gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event)
610 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
612 switch (GST_EVENT_TYPE (event)) {
613 case GST_EVENT_SEEK_SEGMENT:
618 /* first bring the format to time */
619 format = GST_FORMAT_TIME;
620 if (!gst_pad_convert (pad,
621 GST_EVENT_SEEK_FORMAT (event),
622 GST_EVENT_SEEK_ENDOFFSET (event), &format, &position)) {
623 /* could not convert seek format to time offset */
628 dvdec->end_position = position;
629 dvdec->loop = GST_EVENT_SEEK_TYPE (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
636 /* first bring the format to time */
637 format = GST_FORMAT_TIME;
638 if (!gst_pad_convert (pad,
639 GST_EVENT_SEEK_FORMAT (event),
640 GST_EVENT_SEEK_OFFSET (event), &format, &position)) {
641 /* could not convert seek format to time offset */
645 dvdec->next_ts = position;
646 /* then try to figure out the byteoffset for this time */
647 format = GST_FORMAT_BYTES;
648 if (!gst_pad_convert (dvdec->sinkpad, GST_FORMAT_TIME, position,
649 &format, &position)) {
650 /* could not convert seek format to byte offset */
655 if (!gst_bytestream_seek (dvdec->bs, position, GST_SEEK_METHOD_SET)) {
658 if (GST_EVENT_TYPE (event) != GST_EVENT_SEEK_SEGMENT)
659 dvdec->end_position = -1;
666 gst_event_unref (event);
671 gst_dvdec_video_getcaps (GstPad * pad)
675 GstPadTemplate *src_pad_template;
677 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
678 src_pad_template = gst_static_pad_template_get (&video_src_temp);
679 caps = gst_caps_copy (gst_pad_template_get_caps (src_pad_template));
681 if (dvdec->found_header) {
685 for (i = 0; i < gst_caps_get_size (caps); i++) {
686 GstStructure *structure = gst_caps_get_structure (caps, i);
688 gst_structure_set (structure,
689 "height", G_TYPE_INT, dvdec->height,
690 "framerate", G_TYPE_DOUBLE, dvdec->framerate, NULL);
697 static GstPadLinkReturn
698 gst_dvdec_video_link (GstPad * pad, const GstCaps * caps)
701 GstStructure *structure;
706 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
708 /* if we did not find a header yet, return delayed */
709 if (!dvdec->found_header) {
710 return GST_PAD_LINK_DELAYED;
713 structure = gst_caps_get_structure (caps, 0);
715 if (!gst_structure_get_int (structure, "height", &height) ||
716 !gst_structure_get_double (structure, "framerate", &framerate))
717 return GST_PAD_LINK_REFUSED;
719 if ((height != dvdec->height) || (framerate != dvdec->framerate))
720 return GST_PAD_LINK_REFUSED;
722 if (strcmp (gst_structure_get_name (structure), "video/x-raw-rgb") == 0) {
725 gst_structure_get_int (structure, "bpp", &bpp);
727 dvdec->space = e_dv_color_rgb;
730 dvdec->space = e_dv_color_bgr0;
734 if (!gst_structure_get_fourcc (structure, "format", &fourcc))
735 return GST_PAD_LINK_REFUSED;
737 dvdec->space = e_dv_color_yuv;
741 return GST_PAD_LINK_OK;
745 gst_dvdec_push (GstDVDec * dvdec, GstBuffer * outbuf, GstPad * pad,
748 GST_BUFFER_TIMESTAMP (outbuf) = ts;
750 if (dvdec->need_discont) {
753 discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, ts, NULL);
754 gst_pad_push (pad, GST_DATA (discont));
757 gst_pad_push (pad, GST_DATA (outbuf));
759 if ((dvdec->end_position != -1) && (dvdec->next_ts >= dvdec->end_position)) {
761 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_SEGMENT_DONE)));
763 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
768 gst_dvdec_loop (GstElement * element)
771 GstBuffer *buf, *outbuf;
774 guint32 length, got_bytes;
779 dvdec = GST_DVDEC (element);
782 * Apparently dv_parse_header can read from the body of the frame
783 * too, so it needs more than header_size bytes. Wacky!
785 if (dvdec->found_header)
786 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
788 length = NTSC_BUFFER;
790 /* first read enough bytes to parse the header */
791 got_bytes = gst_bytestream_peek_bytes (dvdec->bs, &inframe, length);
792 if (got_bytes < length) {
793 gst_dvdec_handle_sink_event (dvdec);
796 if (dv_parse_header (dvdec->decoder, inframe) < 0) {
797 GST_ELEMENT_ERROR (dvdec, STREAM, DECODE, (NULL), (NULL));
801 /* after parsing the header we know the length of the data */
802 dvdec->PAL = dv_system_50_fields (dvdec->decoder);
803 dvdec->found_header = TRUE;
805 fps = (dvdec->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE);
806 height = (dvdec->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
807 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
809 if ((dvdec->framerate != fps) || (dvdec->height != height)) {
810 dvdec->height = height;
811 dvdec->framerate = fps;
813 if (GST_PAD_LINK_FAILED (gst_pad_renegotiate (dvdec->videosrcpad))) {
814 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL), (NULL));
819 if (length != dvdec->length) {
820 dvdec->length = length;
821 gst_bytestream_size_hint (dvdec->bs, length);
824 /* then read the read data */
825 got_bytes = gst_bytestream_read (dvdec->bs, &buf, length);
826 if (got_bytes < length) {
827 gst_dvdec_handle_sink_event (dvdec);
831 format = GST_FORMAT_TIME;
832 gst_pad_query (dvdec->videosrcpad, GST_QUERY_POSITION, &format, &ts);
834 dvdec->next_ts += GST_SECOND / dvdec->framerate;
836 dv_parse_packs (dvdec->decoder, GST_BUFFER_DATA (buf));
838 if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
842 dv_decode_full_audio (dvdec->decoder, GST_BUFFER_DATA (buf),
843 dvdec->audio_buffers);
845 if ((dvdec->decoder->audio->frequency != dvdec->frequency) ||
846 (dvdec->decoder->audio->num_channels != dvdec->channels)) {
847 if (!gst_pad_set_explicit_caps (dvdec->audiosrcpad,
848 gst_caps_new_simple ("audio/x-raw-int",
849 "rate", G_TYPE_INT, dvdec->decoder->audio->frequency,
850 "depth", G_TYPE_INT, 16,
851 "width", G_TYPE_INT, 16,
852 "signed", G_TYPE_BOOLEAN, TRUE,
853 "channels", G_TYPE_INT, dvdec->decoder->audio->num_channels,
854 "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, NULL))) {
855 gst_buffer_unref (buf);
856 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL), (NULL));
860 dvdec->frequency = dvdec->decoder->audio->frequency;
861 dvdec->channels = dvdec->decoder->audio->num_channels;
864 outbuf = gst_buffer_new ();
865 GST_BUFFER_SIZE (outbuf) = dvdec->decoder->audio->samples_this_frame *
866 sizeof (gint16) * dvdec->decoder->audio->num_channels;
867 GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
869 a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
871 for (i = 0; i < dvdec->decoder->audio->samples_this_frame; i++) {
872 for (j = 0; j < dvdec->decoder->audio->num_channels; j++) {
873 *(a_ptr++) = dvdec->audio_buffers[j][i];
876 gst_dvdec_push (dvdec, outbuf, dvdec->audiosrcpad, ts);
879 if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
881 guint8 *outframe_ptrs[3];
882 gint outframe_pitches[3];
884 outbuf = gst_buffer_new_and_alloc ((720 * height) * dvdec->bpp);
886 outframe = GST_BUFFER_DATA (outbuf);
888 outframe_ptrs[0] = outframe;
889 outframe_pitches[0] = 720 * dvdec->bpp;
891 /* the rest only matters for YUY2 */
892 if (dvdec->bpp < 3) {
893 outframe_ptrs[1] = outframe_ptrs[0] + 720 * height;
894 outframe_ptrs[2] = outframe_ptrs[1] + 360 * height;
896 outframe_pitches[1] = height / 2;
897 outframe_pitches[2] = outframe_pitches[1];
900 dv_decode_full_frame (dvdec->decoder, GST_BUFFER_DATA (buf),
901 dvdec->space, outframe_ptrs, outframe_pitches);
903 gst_dvdec_push (dvdec, outbuf, dvdec->videosrcpad, ts);
906 if ((dvdec->end_position != -1) &&
907 (dvdec->next_ts >= dvdec->end_position) && !dvdec->loop) {
908 gst_element_set_eos (GST_ELEMENT (dvdec));
911 if (dvdec->need_discont) {
912 dvdec->need_discont = FALSE;
915 gst_buffer_unref (buf);
918 static GstElementStateReturn
919 gst_dvdec_change_state (GstElement * element)
921 GstDVDec *dvdec = GST_DVDEC (element);
923 switch (GST_STATE_TRANSITION (element)) {
924 case GST_STATE_NULL_TO_READY:
926 case GST_STATE_READY_TO_PAUSED:
927 dvdec->bs = gst_bytestream_new (dvdec->sinkpad);
929 dv_decoder_new (0, dvdec->clamp_luma, dvdec->clamp_chroma);
930 dvdec->decoder->quality = dvdec->quality;
932 * Enable this function call when libdv2 0.100 or higher is more
935 /* dv_set_quality (dvdec->decoder, dvdec->quality); */
937 case GST_STATE_PAUSED_TO_PLAYING:
939 case GST_STATE_PLAYING_TO_PAUSED:
941 case GST_STATE_PAUSED_TO_READY:
942 dv_decoder_free (dvdec->decoder);
943 dvdec->decoder = NULL;
944 dvdec->found_header = FALSE;
945 gst_bytestream_destroy (dvdec->bs);
947 case GST_STATE_READY_TO_NULL:
953 parent_class->change_state (element);
955 return GST_STATE_SUCCESS;
958 /* Arguments are part of the Gtk+ object system, and these functions
959 * enable the element to respond to various arguments.
962 gst_dvdec_set_property (GObject * object, guint prop_id, const GValue * value,
967 /* It's not null if we got it, but it might not be ours */
968 g_return_if_fail (GST_IS_DVDEC (object));
970 /* Get a pointer of the right type. */
971 dvdec = GST_DVDEC (object);
973 /* Check the argument id to see which argument we're setting. */
976 dvdec->clamp_luma = g_value_get_boolean (value);
978 case ARG_CLAMP_CHROMA:
979 dvdec->clamp_chroma = g_value_get_boolean (value);
982 dvdec->quality = g_value_get_flags (value);
985 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
990 /* The set function is simply the inverse of the get fuction. */
992 gst_dvdec_get_property (GObject * object, guint prop_id, GValue * value,
997 /* It's not null if we got it, but it might not be ours */
998 g_return_if_fail (GST_IS_DVDEC (object));
999 dvdec = GST_DVDEC (object);
1002 case ARG_CLAMP_LUMA:
1003 g_value_set_boolean (value, dvdec->clamp_luma);
1005 case ARG_CLAMP_CHROMA:
1006 g_value_set_boolean (value, dvdec->clamp_chroma);
1009 g_value_set_flags (value, dvdec->quality);
1012 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1017 /* This is the entry into the plugin itself. When the plugin loads,
1018 * this function is called to register everything that the plugin provides.
1021 plugin_init (GstPlugin * plugin)
1023 if (!gst_library_load ("gstbytestream"))
1026 if (!gst_element_register (plugin, "dvdec", GST_RANK_PRIMARY,
1027 gst_dvdec_get_type ()))
1033 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1036 "Uses libdv to decode DV video (libdv.sourceforge.net)",
1037 plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN);