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) 0x000000ff, "
97 "green_mask = (int) 0x0000ff00, "
98 "blue_mask = (int) 0x00ff0000, "
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) 0x000000ff, "
111 "green_mask = (int) 0x0000ff00, "
112 "blue_mask = (int) 0x00ff0000, "
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"},
147 qtype = g_flags_register_static ("GstDVDecQualityFlags", values);
152 /* A number of functon prototypes are given so we can refer to them later. */
153 static void gst_dvdec_base_init (gpointer g_class);
154 static void gst_dvdec_class_init (GstDVDecClass * klass);
155 static void gst_dvdec_init (GstDVDec * dvdec);
157 static const GstQueryType *gst_dvdec_get_src_query_types (GstPad * pad);
158 static gboolean gst_dvdec_src_query (GstPad * pad, GstQueryType type,
159 GstFormat * format, gint64 * value);
160 static const GstFormat *gst_dvdec_get_formats (GstPad * pad);
161 static gboolean gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format,
162 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
163 static gboolean gst_dvdec_src_convert (GstPad * pad, GstFormat src_format,
164 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
166 static GstPadLinkReturn gst_dvdec_video_link (GstPad * pad,
167 const GstCaps * caps);
168 static GstCaps *gst_dvdec_video_getcaps (GstPad * pad);
170 static const GstEventMask *gst_dvdec_get_event_masks (GstPad * pad);
171 static gboolean gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event);
173 static void gst_dvdec_loop (GstElement * element);
175 static GstElementStateReturn gst_dvdec_change_state (GstElement * element);
177 static void gst_dvdec_set_property (GObject * object, guint prop_id,
178 const GValue * value, GParamSpec * pspec);
179 static void gst_dvdec_get_property (GObject * object, guint prop_id,
180 GValue * value, GParamSpec * pspec);
182 /* The parent class pointer needs to be kept around for some object
185 static GstElementClass *parent_class = NULL;
187 /* This array holds the ids of the signals registered for this object.
188 * The array indexes are based on the enum up above.
190 /*static guint gst_dvdec_signals[LAST_SIGNAL] = { 0 }; */
192 /* This function is used to register and subsequently return the type
193 * identifier for this object class. On first invocation, it will
194 * register the type, providing the name of the class, struct sizes,
195 * and pointers to the various functions that define the class.
198 gst_dvdec_get_type (void)
200 static GType dvdec_type = 0;
203 static const GTypeInfo dvdec_info = {
204 sizeof (GstDVDecClass),
207 (GClassInitFunc) gst_dvdec_class_init,
212 (GInstanceInitFunc) gst_dvdec_init,
215 g_type_register_static (GST_TYPE_ELEMENT, "GstDVDec", &dvdec_info, 0);
221 gst_dvdec_base_init (gpointer g_class)
223 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
225 /* The pad templates can be easily generated from the factories above,
226 * and then added to the list of padtemplates for the elementfactory.
227 * Note that the generated padtemplates are stored in static global
228 * variables, for the gst_dvdec_init function to use later on.
230 gst_element_class_add_pad_template (element_class,
231 gst_static_pad_template_get (&sink_temp));
232 gst_element_class_add_pad_template (element_class,
233 gst_static_pad_template_get (&video_src_temp));
234 gst_element_class_add_pad_template (element_class,
235 gst_static_pad_template_get (&audio_src_temp));
237 gst_element_class_set_details (element_class, &dvdec_details);
240 /* In order to create an instance of an object, the class must be
241 * initialized by this function. GObject will take care of running
242 * it, based on the pointer to the function provided above.
245 gst_dvdec_class_init (GstDVDecClass * klass)
247 /* Class pointers are needed to supply pointers to the private
248 * implementations of parent class methods.
250 GObjectClass *gobject_class;
251 GstElementClass *gstelement_class;
253 /* Since the dvdec class contains the parent classes, you can simply
254 * cast the pointer to get access to the parent classes.
256 gobject_class = (GObjectClass *) klass;
257 gstelement_class = (GstElementClass *) klass;
259 /* The parent class is needed for class method overrides. */
260 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
262 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_LUMA,
263 g_param_spec_boolean ("clamp_luma", "Clamp luma", "Clamp luma",
264 FALSE, G_PARAM_READWRITE));
265 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_CHROMA,
266 g_param_spec_boolean ("clamp_chroma", "Clamp chroma", "Clamp chroma",
267 FALSE, G_PARAM_READWRITE));
268 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY,
269 g_param_spec_flags ("quality", "Quality", "Decoding quality",
270 GST_TYPE_DVDEC_QUALITY, DV_QUALITY_BEST, G_PARAM_READWRITE));
272 gobject_class->set_property = gst_dvdec_set_property;
273 gobject_class->get_property = gst_dvdec_get_property;
275 gstelement_class->change_state = gst_dvdec_change_state;
277 /* table initialization, only do once */
281 /* This function is responsible for initializing a specific instance of
285 gst_dvdec_init (GstDVDec * dvdec)
289 dvdec->found_header = FALSE;
292 gst_pad_new_from_template (gst_static_pad_template_get (&sink_temp),
294 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->sinkpad);
295 gst_pad_set_query_function (dvdec->sinkpad, NULL);
296 gst_pad_set_convert_function (dvdec->sinkpad,
297 GST_DEBUG_FUNCPTR (gst_dvdec_sink_convert));
298 gst_pad_set_formats_function (dvdec->sinkpad,
299 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
302 gst_pad_new_from_template (gst_static_pad_template_get (&video_src_temp),
304 gst_pad_set_query_function (dvdec->videosrcpad,
305 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
306 gst_pad_set_query_type_function (dvdec->videosrcpad,
307 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
308 gst_pad_set_event_function (dvdec->videosrcpad,
309 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
310 gst_pad_set_event_mask_function (dvdec->videosrcpad,
311 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
312 gst_pad_set_convert_function (dvdec->videosrcpad,
313 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
314 gst_pad_set_formats_function (dvdec->videosrcpad,
315 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
316 gst_pad_set_getcaps_function (dvdec->videosrcpad,
317 GST_DEBUG_FUNCPTR (gst_dvdec_video_getcaps));
318 gst_pad_set_link_function (dvdec->videosrcpad,
319 GST_DEBUG_FUNCPTR (gst_dvdec_video_link));
320 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->videosrcpad);
323 gst_pad_new_from_template (gst_static_pad_template_get (&audio_src_temp),
325 gst_pad_set_query_function (dvdec->audiosrcpad,
326 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
327 gst_pad_set_query_type_function (dvdec->audiosrcpad,
328 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
329 gst_pad_set_event_function (dvdec->audiosrcpad,
330 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
331 gst_pad_set_event_mask_function (dvdec->audiosrcpad,
332 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
333 gst_pad_set_convert_function (dvdec->audiosrcpad,
334 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
335 gst_pad_set_formats_function (dvdec->audiosrcpad,
336 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
337 gst_pad_use_explicit_caps (dvdec->audiosrcpad);
338 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->audiosrcpad);
340 gst_element_set_loop_function (GST_ELEMENT (dvdec), gst_dvdec_loop);
343 dvdec->next_ts = 0LL;
344 dvdec->end_position = -1LL;
345 dvdec->need_discont = FALSE;
346 dvdec->framerate = 0;
348 dvdec->frequency = 0;
351 dvdec->clamp_luma = FALSE;
352 dvdec->clamp_chroma = FALSE;
353 dvdec->quality = DV_QUALITY_BEST;
356 for (i = 0; i < 4; i++) {
357 dvdec->audio_buffers[i] =
358 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
362 static const GstFormat *
363 gst_dvdec_get_formats (GstPad * pad)
365 static const GstFormat src_formats[] = {
371 static const GstFormat sink_formats[] = {
377 return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
381 gst_dvdec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
382 GstFormat * dest_format, gint64 * dest_value)
388 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
390 if (dvdec->length == 0)
393 if (dvdec->decoder == NULL)
396 switch (src_format) {
397 case GST_FORMAT_BYTES:
398 switch (*dest_format) {
399 case GST_FORMAT_TIME:
404 case GST_FORMAT_TIME:
405 switch (*dest_format) {
406 case GST_FORMAT_BYTES:
407 if (pad == dvdec->videosrcpad)
408 scale = 720 * dvdec->height * dvdec->bpp;
409 else if (pad == dvdec->audiosrcpad)
410 scale = dvdec->decoder->audio->num_channels * 2;
412 case GST_FORMAT_DEFAULT:
413 if (pad == dvdec->videosrcpad)
414 *dest_value = src_value * dvdec->framerate * scale / GST_SECOND;
415 else if (pad == dvdec->audiosrcpad)
417 src_value * dvdec->decoder->audio->frequency * scale /
431 gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
432 GstFormat * dest_format, gint64 * dest_value)
437 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
439 if (dvdec->length == 0)
442 switch (src_format) {
443 case GST_FORMAT_BYTES:
444 switch (*dest_format) {
445 case GST_FORMAT_TIME:
449 /* get frame number */
450 frame = src_value / dvdec->length;
452 *dest_value = (frame * GST_SECOND) / dvdec->framerate;
459 case GST_FORMAT_TIME:
460 switch (*dest_format) {
461 case GST_FORMAT_BYTES:
465 /* calculate the frame */
466 frame = src_value * dvdec->framerate / GST_SECOND;
467 /* calculate the offset */
468 *dest_value = frame * dvdec->length;
481 static const GstQueryType *
482 gst_dvdec_get_src_query_types (GstPad * pad)
484 static const GstQueryType src_query_types[] = {
489 return src_query_types;
493 gst_dvdec_src_query (GstPad * pad, GstQueryType type,
494 GstFormat * format, gint64 * value)
499 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
502 case GST_QUERY_TOTAL:
507 GstFormat tmp_format;
509 len = gst_bytestream_length (dvdec->bs);
510 tmp_format = GST_FORMAT_TIME;
511 if (len == -1 || !gst_pad_convert (dvdec->sinkpad,
512 GST_FORMAT_BYTES, len, &tmp_format, value)) {
515 if (!gst_pad_convert (pad, GST_FORMAT_TIME, *value, format, value)) {
522 case GST_QUERY_POSITION:
526 gst_pad_convert (pad, GST_FORMAT_TIME, dvdec->next_ts, format,
538 static const GstEventMask *
539 gst_dvdec_get_event_masks (GstPad * pad)
541 static const GstEventMask src_event_masks[] = {
542 {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
545 static const GstEventMask sink_event_masks[] = {
547 {GST_EVENT_DISCONTINUOUS, 0},
548 {GST_EVENT_FLUSH, 0},
552 return (GST_PAD_IS_SRC (pad) ? src_event_masks : sink_event_masks);
556 gst_dvdec_handle_sink_event (GstDVDec * dvdec)
562 gst_bytestream_get_status (dvdec->bs, &remaining, &event);
564 type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
567 case GST_EVENT_FLUSH:
569 case GST_EVENT_DISCONTINUOUS:
572 gboolean found = FALSE;
575 format = GST_FORMAT_TIME;
576 /* try to get a timestamp from the discont formats */
577 for (i = 0; i < GST_EVENT_DISCONT_OFFSET_LEN (event); i++) {
578 if (gst_pad_convert (dvdec->sinkpad,
579 GST_EVENT_DISCONT_OFFSET (event, i).format,
580 GST_EVENT_DISCONT_OFFSET (event, i).value,
581 &format, &dvdec->next_ts)) {
588 dvdec->next_ts = 0LL;
590 dvdec->need_discont = TRUE;
594 return gst_pad_event_default (dvdec->sinkpad, event);
597 gst_event_unref (event);
602 gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event)
607 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
609 switch (GST_EVENT_TYPE (event)) {
610 case GST_EVENT_SEEK_SEGMENT:
615 /* first bring the format to time */
616 format = GST_FORMAT_TIME;
617 if (!gst_pad_convert (pad,
618 GST_EVENT_SEEK_FORMAT (event),
619 GST_EVENT_SEEK_ENDOFFSET (event), &format, &position)) {
620 /* could not convert seek format to time offset */
625 dvdec->end_position = position;
626 dvdec->loop = GST_EVENT_SEEK_TYPE (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
633 /* first bring the format to time */
634 format = GST_FORMAT_TIME;
635 if (!gst_pad_convert (pad,
636 GST_EVENT_SEEK_FORMAT (event),
637 GST_EVENT_SEEK_OFFSET (event), &format, &position)) {
638 /* could not convert seek format to time offset */
642 dvdec->next_ts = position;
643 /* then try to figure out the byteoffset for this time */
644 format = GST_FORMAT_BYTES;
645 if (!gst_pad_convert (dvdec->sinkpad, GST_FORMAT_TIME, position,
646 &format, &position)) {
647 /* could not convert seek format to byte offset */
652 if (!gst_bytestream_seek (dvdec->bs, position, GST_SEEK_METHOD_SET)) {
655 if (GST_EVENT_TYPE (event) != GST_EVENT_SEEK_SEGMENT)
656 dvdec->end_position = -1;
663 gst_event_unref (event);
668 gst_dvdec_video_getcaps (GstPad * pad)
672 GstPadTemplate *src_pad_template;
674 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
675 src_pad_template = gst_static_pad_template_get (&video_src_temp);
676 caps = gst_caps_copy (gst_pad_template_get_caps (src_pad_template));
678 if (dvdec->found_header) {
682 for (i = 0; i < gst_caps_get_size (caps); i++) {
683 GstStructure *structure = gst_caps_get_structure (caps, i);
685 gst_structure_set (structure,
686 "height", G_TYPE_INT, dvdec->height,
687 "framerate", G_TYPE_DOUBLE, dvdec->framerate, NULL);
694 static GstPadLinkReturn
695 gst_dvdec_video_link (GstPad * pad, const GstCaps * caps)
698 GstStructure *structure;
703 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
705 /* if we did not find a header yet, return delayed */
706 if (!dvdec->found_header) {
707 return GST_PAD_LINK_DELAYED;
710 structure = gst_caps_get_structure (caps, 0);
712 /* it worked, try to find what it was again */
713 if (!gst_structure_get_fourcc (structure, "format", &fourcc) ||
714 !gst_structure_get_int (structure, "height", &height) ||
715 !gst_structure_get_double (structure, "framerate", &framerate))
716 return GST_PAD_LINK_REFUSED;
718 if ((height != dvdec->height) || (framerate != dvdec->framerate))
719 return GST_PAD_LINK_REFUSED;
721 if (fourcc == GST_STR_FOURCC ("RGB ")) {
724 gst_structure_get_int (structure, "bpp", &bpp);
726 dvdec->space = e_dv_color_rgb;
729 dvdec->space = e_dv_color_bgr0;
733 dvdec->space = e_dv_color_yuv;
737 return GST_PAD_LINK_OK;
741 gst_dvdec_push (GstDVDec * dvdec, GstBuffer * outbuf, GstPad * pad,
744 GST_BUFFER_TIMESTAMP (outbuf) = ts;
746 if (dvdec->need_discont) {
749 discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, ts, NULL);
750 gst_pad_push (pad, GST_DATA (discont));
753 gst_pad_push (pad, GST_DATA (outbuf));
755 if ((dvdec->end_position != -1) && (dvdec->next_ts >= dvdec->end_position)) {
757 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_SEGMENT_DONE)));
759 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
764 gst_dvdec_loop (GstElement * element)
767 GstBuffer *buf, *outbuf;
770 guint32 length, got_bytes;
775 dvdec = GST_DVDEC (element);
777 /* first read enough bytes to parse the header */
778 got_bytes = gst_bytestream_peek_bytes (dvdec->bs, &inframe, header_size);
779 if (got_bytes < header_size) {
780 gst_dvdec_handle_sink_event (dvdec);
783 if (dv_parse_header (dvdec->decoder, inframe) < 0) {
784 GST_ELEMENT_ERROR (dvdec, STREAM, DECODE, (NULL), (NULL));
788 /* after parsing the header we know the length of the data */
789 dvdec->PAL = dv_system_50_fields (dvdec->decoder);
790 dvdec->found_header = TRUE;
792 fps = (dvdec->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE);
793 height = (dvdec->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
794 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
796 if ((dvdec->framerate != fps) || (dvdec->height != height)) {
797 dvdec->height = height;
798 dvdec->framerate = fps;
800 if (GST_PAD_LINK_FAILED (gst_pad_renegotiate (dvdec->videosrcpad))) {
801 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL), (NULL));
806 if (length != dvdec->length) {
807 dvdec->length = length;
808 gst_bytestream_size_hint (dvdec->bs, length);
811 /* then read the read data */
812 got_bytes = gst_bytestream_read (dvdec->bs, &buf, length);
813 if (got_bytes < length) {
814 gst_dvdec_handle_sink_event (dvdec);
818 format = GST_FORMAT_TIME;
819 gst_pad_query (dvdec->videosrcpad, GST_QUERY_POSITION, &format, &ts);
821 dvdec->next_ts += GST_SECOND / dvdec->framerate;
823 dv_parse_packs (dvdec->decoder, GST_BUFFER_DATA (buf));
825 if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
829 dv_decode_full_audio (dvdec->decoder, GST_BUFFER_DATA (buf),
830 dvdec->audio_buffers);
832 if ((dvdec->decoder->audio->frequency != dvdec->frequency) ||
833 (dvdec->decoder->audio->num_channels != dvdec->channels)) {
834 if (!gst_pad_set_explicit_caps (dvdec->audiosrcpad,
835 gst_caps_new_simple ("audio/x-raw-int",
836 "rate", G_TYPE_INT, dvdec->decoder->audio->frequency,
837 "depth", G_TYPE_INT, 16,
838 "width", G_TYPE_INT, 16,
839 "signed", G_TYPE_BOOLEAN, TRUE,
840 "channels", G_TYPE_INT, dvdec->decoder->audio->num_channels,
841 "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, NULL))) {
842 gst_buffer_unref (buf);
843 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL), (NULL));
847 dvdec->frequency = dvdec->decoder->audio->frequency;
848 dvdec->channels = dvdec->decoder->audio->num_channels;
851 outbuf = gst_buffer_new ();
852 GST_BUFFER_SIZE (outbuf) = dvdec->decoder->audio->samples_this_frame *
853 sizeof (gint16) * dvdec->decoder->audio->num_channels;
854 GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
856 a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
858 for (i = 0; i < dvdec->decoder->audio->samples_this_frame; i++) {
859 for (j = 0; j < dvdec->decoder->audio->num_channels; j++) {
860 *(a_ptr++) = dvdec->audio_buffers[j][i];
863 gst_dvdec_push (dvdec, outbuf, dvdec->audiosrcpad, ts);
866 if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
868 guint8 *outframe_ptrs[3];
869 gint outframe_pitches[3];
871 outbuf = gst_buffer_new_and_alloc ((720 * height) * dvdec->bpp);
873 outframe = GST_BUFFER_DATA (outbuf);
875 outframe_ptrs[0] = outframe;
876 outframe_pitches[0] = 720 * dvdec->bpp;
878 /* the rest only matters for YUY2 */
879 if (dvdec->bpp < 3) {
880 outframe_ptrs[1] = outframe_ptrs[0] + 720 * height;
881 outframe_ptrs[2] = outframe_ptrs[1] + 360 * height;
883 outframe_pitches[1] = height / 2;
884 outframe_pitches[2] = outframe_pitches[1];
887 dv_decode_full_frame (dvdec->decoder, GST_BUFFER_DATA (buf),
888 dvdec->space, outframe_ptrs, outframe_pitches);
890 gst_dvdec_push (dvdec, outbuf, dvdec->videosrcpad, ts);
893 if ((dvdec->end_position != -1) &&
894 (dvdec->next_ts >= dvdec->end_position) && !dvdec->loop) {
895 gst_element_set_eos (GST_ELEMENT (dvdec));
898 if (dvdec->need_discont) {
899 dvdec->need_discont = FALSE;
902 gst_buffer_unref (buf);
905 static GstElementStateReturn
906 gst_dvdec_change_state (GstElement * element)
908 GstDVDec *dvdec = GST_DVDEC (element);
910 switch (GST_STATE_TRANSITION (element)) {
911 case GST_STATE_NULL_TO_READY:
913 case GST_STATE_READY_TO_PAUSED:
914 dvdec->bs = gst_bytestream_new (dvdec->sinkpad);
916 dv_decoder_new (0, dvdec->clamp_luma, dvdec->clamp_chroma);
917 dvdec->decoder->quality = dvdec->quality;
919 case GST_STATE_PAUSED_TO_PLAYING:
921 case GST_STATE_PLAYING_TO_PAUSED:
923 case GST_STATE_PAUSED_TO_READY:
924 dv_decoder_free (dvdec->decoder);
925 dvdec->decoder = NULL;
926 dvdec->found_header = FALSE;
927 gst_bytestream_destroy (dvdec->bs);
929 case GST_STATE_READY_TO_NULL:
935 parent_class->change_state (element);
937 return GST_STATE_SUCCESS;
940 /* Arguments are part of the Gtk+ object system, and these functions
941 * enable the element to respond to various arguments.
944 gst_dvdec_set_property (GObject * object, guint prop_id, const GValue * value,
949 /* It's not null if we got it, but it might not be ours */
950 g_return_if_fail (GST_IS_DVDEC (object));
952 /* Get a pointer of the right type. */
953 dvdec = GST_DVDEC (object);
955 /* Check the argument id to see which argument we're setting. */
958 dvdec->clamp_luma = g_value_get_boolean (value);
960 case ARG_CLAMP_CHROMA:
961 dvdec->clamp_chroma = g_value_get_boolean (value);
964 dvdec->quality = g_value_get_flags (value);
967 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
972 /* The set function is simply the inverse of the get fuction. */
974 gst_dvdec_get_property (GObject * object, guint prop_id, GValue * value,
979 /* It's not null if we got it, but it might not be ours */
980 g_return_if_fail (GST_IS_DVDEC (object));
981 dvdec = GST_DVDEC (object);
985 g_value_set_boolean (value, dvdec->clamp_luma);
987 case ARG_CLAMP_CHROMA:
988 g_value_set_boolean (value, dvdec->clamp_chroma);
991 g_value_set_flags (value, dvdec->quality);
994 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
999 /* This is the entry into the plugin itself. When the plugin loads,
1000 * this function is called to register everything that the plugin provides.
1003 plugin_init (GstPlugin * plugin)
1005 if (!gst_library_load ("gstbytestream"))
1008 if (!gst_element_register (plugin, "dvdec", GST_RANK_PRIMARY,
1009 gst_dvdec_get_type ()))
1015 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1018 "Uses libdv to decode DV video (libdv.sourceforge.net)",
1019 plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN);