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"},
162 qtype = g_enum_register_static ("GstDVDecQualityEnum", values);
167 /* A number of functon prototypes are given so we can refer to them later. */
168 static void gst_dvdec_base_init (gpointer g_class);
169 static void gst_dvdec_class_init (GstDVDecClass * klass);
170 static void gst_dvdec_init (GstDVDec * dvdec);
172 static const GstQueryType *gst_dvdec_get_src_query_types (GstPad * pad);
173 static gboolean gst_dvdec_src_query (GstPad * pad, GstQueryType type,
174 GstFormat * format, gint64 * value);
175 static const GstFormat *gst_dvdec_get_formats (GstPad * pad);
176 static gboolean gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format,
177 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
178 static gboolean gst_dvdec_src_convert (GstPad * pad, GstFormat src_format,
179 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
181 static GstPadLinkReturn gst_dvdec_video_link (GstPad * pad,
182 const GstCaps * caps);
183 static GstCaps *gst_dvdec_video_getcaps (GstPad * pad);
185 static const GstEventMask *gst_dvdec_get_event_masks (GstPad * pad);
186 static gboolean gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event);
188 static void gst_dvdec_loop (GstElement * element);
190 static GstElementStateReturn gst_dvdec_change_state (GstElement * element);
192 static void gst_dvdec_set_property (GObject * object, guint prop_id,
193 const GValue * value, GParamSpec * pspec);
194 static void gst_dvdec_get_property (GObject * object, guint prop_id,
195 GValue * value, GParamSpec * pspec);
197 /* The parent class pointer needs to be kept around for some object
200 static GstElementClass *parent_class = NULL;
202 /* This array holds the ids of the signals registered for this object.
203 * The array indexes are based on the enum up above.
205 /*static guint gst_dvdec_signals[LAST_SIGNAL] = { 0 }; */
207 /* This function is used to register and subsequently return the type
208 * identifier for this object class. On first invocation, it will
209 * register the type, providing the name of the class, struct sizes,
210 * and pointers to the various functions that define the class.
213 gst_dvdec_get_type (void)
215 static GType dvdec_type = 0;
218 static const GTypeInfo dvdec_info = {
219 sizeof (GstDVDecClass),
222 (GClassInitFunc) gst_dvdec_class_init,
227 (GInstanceInitFunc) gst_dvdec_init,
231 g_type_register_static (GST_TYPE_ELEMENT, "GstDVDec", &dvdec_info, 0);
237 gst_dvdec_base_init (gpointer g_class)
239 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
241 /* The pad templates can be easily generated from the factories above,
242 * and then added to the list of padtemplates for the elementfactory.
243 * Note that the generated padtemplates are stored in static global
244 * variables, for the gst_dvdec_init function to use later on.
246 gst_element_class_add_pad_template (element_class,
247 gst_static_pad_template_get (&sink_temp));
248 gst_element_class_add_pad_template (element_class,
249 gst_static_pad_template_get (&video_src_temp));
250 gst_element_class_add_pad_template (element_class,
251 gst_static_pad_template_get (&audio_src_temp));
253 gst_element_class_set_details (element_class, &dvdec_details);
256 /* In order to create an instance of an object, the class must be
257 * initialized by this function. GObject will take care of running
258 * it, based on the pointer to the function provided above.
261 gst_dvdec_class_init (GstDVDecClass * klass)
263 /* Class pointers are needed to supply pointers to the private
264 * implementations of parent class methods.
266 GObjectClass *gobject_class;
267 GstElementClass *gstelement_class;
269 /* Since the dvdec class contains the parent classes, you can simply
270 * cast the pointer to get access to the parent classes.
272 gobject_class = (GObjectClass *) klass;
273 gstelement_class = (GstElementClass *) klass;
275 /* The parent class is needed for class method overrides. */
276 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
278 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_LUMA,
279 g_param_spec_boolean ("clamp_luma", "Clamp luma", "Clamp luma",
280 FALSE, G_PARAM_READWRITE));
281 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_CLAMP_CHROMA,
282 g_param_spec_boolean ("clamp_chroma", "Clamp chroma", "Clamp chroma",
283 FALSE, G_PARAM_READWRITE));
284 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_QUALITY,
285 g_param_spec_enum ("quality", "Quality", "Decoding quality",
286 GST_TYPE_DVDEC_QUALITY, DV_QUALITY_DEFAULT, G_PARAM_READWRITE));
288 gobject_class->set_property = gst_dvdec_set_property;
289 gobject_class->get_property = gst_dvdec_get_property;
291 gstelement_class->change_state = gst_dvdec_change_state;
293 /* table initialization, only do once */
297 /* This function is responsible for initializing a specific instance of
301 gst_dvdec_init (GstDVDec * dvdec)
305 dvdec->found_header = FALSE;
308 gst_pad_new_from_template (gst_static_pad_template_get (&sink_temp),
310 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->sinkpad);
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));
318 gst_pad_new_from_template (gst_static_pad_template_get (&video_src_temp),
320 gst_pad_set_query_function (dvdec->videosrcpad,
321 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
322 gst_pad_set_query_type_function (dvdec->videosrcpad,
323 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
324 gst_pad_set_event_function (dvdec->videosrcpad,
325 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
326 gst_pad_set_event_mask_function (dvdec->videosrcpad,
327 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
328 gst_pad_set_convert_function (dvdec->videosrcpad,
329 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
330 gst_pad_set_formats_function (dvdec->videosrcpad,
331 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
332 gst_pad_set_getcaps_function (dvdec->videosrcpad,
333 GST_DEBUG_FUNCPTR (gst_dvdec_video_getcaps));
334 gst_pad_set_link_function (dvdec->videosrcpad,
335 GST_DEBUG_FUNCPTR (gst_dvdec_video_link));
336 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->videosrcpad);
339 gst_pad_new_from_template (gst_static_pad_template_get (&audio_src_temp),
341 gst_pad_set_query_function (dvdec->audiosrcpad,
342 GST_DEBUG_FUNCPTR (gst_dvdec_src_query));
343 gst_pad_set_query_type_function (dvdec->audiosrcpad,
344 GST_DEBUG_FUNCPTR (gst_dvdec_get_src_query_types));
345 gst_pad_set_event_function (dvdec->audiosrcpad,
346 GST_DEBUG_FUNCPTR (gst_dvdec_handle_src_event));
347 gst_pad_set_event_mask_function (dvdec->audiosrcpad,
348 GST_DEBUG_FUNCPTR (gst_dvdec_get_event_masks));
349 gst_pad_set_convert_function (dvdec->audiosrcpad,
350 GST_DEBUG_FUNCPTR (gst_dvdec_src_convert));
351 gst_pad_set_formats_function (dvdec->audiosrcpad,
352 GST_DEBUG_FUNCPTR (gst_dvdec_get_formats));
353 gst_pad_use_explicit_caps (dvdec->audiosrcpad);
354 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->audiosrcpad);
356 gst_element_set_loop_function (GST_ELEMENT (dvdec), gst_dvdec_loop);
359 dvdec->next_ts = 0LL;
360 dvdec->end_position = -1LL;
361 dvdec->need_discont = FALSE;
362 dvdec->framerate = 0;
364 dvdec->frequency = 0;
367 dvdec->clamp_luma = FALSE;
368 dvdec->clamp_chroma = FALSE;
369 dvdec->quality = DV_QUALITY_BEST;
372 for (i = 0; i < 4; i++) {
373 dvdec->audio_buffers[i] =
374 (gint16 *) g_malloc (DV_AUDIO_MAX_SAMPLES * sizeof (gint16));
378 static const GstFormat *
379 gst_dvdec_get_formats (GstPad * pad)
381 static const GstFormat src_formats[] = {
387 static const GstFormat sink_formats[] = {
393 return (GST_PAD_IS_SRC (pad) ? src_formats : sink_formats);
397 gst_dvdec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
398 GstFormat * dest_format, gint64 * dest_value)
404 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
406 if (dvdec->length == 0)
409 if (dvdec->decoder == NULL)
412 switch (src_format) {
413 case GST_FORMAT_BYTES:
414 switch (*dest_format) {
415 case GST_FORMAT_TIME:
420 case GST_FORMAT_TIME:
421 switch (*dest_format) {
422 case GST_FORMAT_BYTES:
423 if (pad == dvdec->videosrcpad)
424 scale = 720 * dvdec->height * dvdec->bpp;
425 else if (pad == dvdec->audiosrcpad)
426 scale = dvdec->decoder->audio->num_channels * 2;
428 case GST_FORMAT_DEFAULT:
429 *dest_format = GST_FORMAT_TIME;
430 if (pad == dvdec->videosrcpad)
431 *dest_value = src_value * dvdec->framerate * scale / GST_SECOND;
432 else if (pad == dvdec->audiosrcpad)
434 src_value * dvdec->decoder->audio->frequency * scale /
448 gst_dvdec_sink_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
449 GstFormat * dest_format, gint64 * dest_value)
454 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
456 if (dvdec->length == 0)
459 switch (src_format) {
460 case GST_FORMAT_BYTES:
461 switch (*dest_format) {
462 case GST_FORMAT_TIME:
466 /* get frame number */
467 frame = src_value / dvdec->length;
469 *dest_value = (frame * GST_SECOND) / dvdec->framerate;
476 case GST_FORMAT_TIME:
477 switch (*dest_format) {
478 case GST_FORMAT_BYTES:
482 /* calculate the frame */
483 frame = src_value * dvdec->framerate / GST_SECOND;
484 /* calculate the offset */
485 *dest_value = frame * dvdec->length;
498 static const GstQueryType *
499 gst_dvdec_get_src_query_types (GstPad * pad)
501 static const GstQueryType src_query_types[] = {
507 return src_query_types;
511 gst_dvdec_src_query (GstPad * pad, GstQueryType type,
512 GstFormat * format, gint64 * value)
517 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
520 case GST_QUERY_TOTAL:
525 GstFormat tmp_format;
527 len = gst_bytestream_length (dvdec->bs);
528 tmp_format = GST_FORMAT_TIME;
529 if (len == -1 || !gst_pad_convert (dvdec->sinkpad,
530 GST_FORMAT_BYTES, len, &tmp_format, value)) {
533 if (!gst_pad_convert (pad, GST_FORMAT_TIME, *value, format, value)) {
540 case GST_QUERY_POSITION:
544 gst_pad_convert (pad, GST_FORMAT_TIME, dvdec->next_ts, format,
556 static const GstEventMask *
557 gst_dvdec_get_event_masks (GstPad * pad)
559 static const GstEventMask src_event_masks[] = {
560 {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
563 static const GstEventMask sink_event_masks[] = {
565 {GST_EVENT_DISCONTINUOUS, 0},
566 {GST_EVENT_FLUSH, 0},
570 return (GST_PAD_IS_SRC (pad) ? src_event_masks : sink_event_masks);
574 gst_dvdec_handle_sink_event (GstDVDec * dvdec)
580 gst_bytestream_get_status (dvdec->bs, &remaining, &event);
582 type = event ? GST_EVENT_TYPE (event) : GST_EVENT_UNKNOWN;
585 case GST_EVENT_FLUSH:
587 case GST_EVENT_DISCONTINUOUS:
590 gboolean found = FALSE;
593 format = GST_FORMAT_TIME;
594 /* try to get a timestamp from the discont formats */
595 for (i = 0; i < GST_EVENT_DISCONT_OFFSET_LEN (event); i++) {
596 if (gst_pad_convert (dvdec->sinkpad,
597 GST_EVENT_DISCONT_OFFSET (event, i).format,
598 GST_EVENT_DISCONT_OFFSET (event, i).value,
599 &format, &dvdec->next_ts)) {
606 dvdec->next_ts = 0LL;
608 dvdec->need_discont = TRUE;
612 return gst_pad_event_default (dvdec->sinkpad, event);
615 gst_event_unref (event);
620 gst_dvdec_handle_src_event (GstPad * pad, GstEvent * event)
625 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
627 switch (GST_EVENT_TYPE (event)) {
628 case GST_EVENT_SEEK_SEGMENT:
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_ENDOFFSET (event), &format, &position)) {
638 /* could not convert seek format to time offset */
643 dvdec->end_position = position;
644 dvdec->loop = GST_EVENT_SEEK_TYPE (event) & GST_SEEK_FLAG_SEGMENT_LOOP;
651 /* first bring the format to time */
652 format = GST_FORMAT_TIME;
653 if (!gst_pad_convert (pad,
654 GST_EVENT_SEEK_FORMAT (event),
655 GST_EVENT_SEEK_OFFSET (event), &format, &position)) {
656 /* could not convert seek format to time offset */
660 dvdec->next_ts = position;
661 /* then try to figure out the byteoffset for this time */
662 format = GST_FORMAT_BYTES;
663 if (!gst_pad_convert (dvdec->sinkpad, GST_FORMAT_TIME, position,
664 &format, &position)) {
665 /* could not convert seek format to byte offset */
670 if (!gst_bytestream_seek (dvdec->bs, position, GST_SEEK_METHOD_SET)) {
673 if (GST_EVENT_TYPE (event) != GST_EVENT_SEEK_SEGMENT)
674 dvdec->end_position = -1;
681 gst_event_unref (event);
686 gst_dvdec_video_getcaps (GstPad * pad)
690 GstPadTemplate *src_pad_template;
692 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
693 src_pad_template = gst_static_pad_template_get (&video_src_temp);
694 caps = gst_caps_copy (gst_pad_template_get_caps (src_pad_template));
696 if (dvdec->found_header) {
700 for (i = 0; i < gst_caps_get_size (caps); i++) {
701 GstStructure *structure = gst_caps_get_structure (caps, i);
703 gst_structure_set (structure,
704 "height", G_TYPE_INT, dvdec->height,
705 "framerate", G_TYPE_DOUBLE, dvdec->framerate, NULL);
712 static GstPadLinkReturn
713 gst_dvdec_video_link (GstPad * pad, const GstCaps * caps)
716 GstStructure *structure;
721 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
723 /* if we did not find a header yet, return delayed */
724 if (!dvdec->found_header) {
725 return GST_PAD_LINK_DELAYED;
728 structure = gst_caps_get_structure (caps, 0);
730 if (!gst_structure_get_int (structure, "height", &height) ||
731 !gst_structure_get_double (structure, "framerate", &framerate))
732 return GST_PAD_LINK_REFUSED;
734 if ((height != dvdec->height) || (framerate != dvdec->framerate))
735 return GST_PAD_LINK_REFUSED;
737 if (strcmp (gst_structure_get_name (structure), "video/x-raw-rgb") == 0) {
740 gst_structure_get_int (structure, "bpp", &bpp);
742 dvdec->space = e_dv_color_rgb;
745 dvdec->space = e_dv_color_bgr0;
749 if (!gst_structure_get_fourcc (structure, "format", &fourcc))
750 return GST_PAD_LINK_REFUSED;
752 dvdec->space = e_dv_color_yuv;
756 return GST_PAD_LINK_OK;
760 gst_dvdec_push (GstDVDec * dvdec, GstBuffer * outbuf, GstPad * pad,
763 GST_BUFFER_TIMESTAMP (outbuf) = ts;
765 if (dvdec->need_discont) {
768 discont = gst_event_new_discontinuous (FALSE, GST_FORMAT_TIME, ts, NULL);
769 gst_pad_push (pad, GST_DATA (discont));
772 gst_pad_push (pad, GST_DATA (outbuf));
774 if ((dvdec->end_position != -1) && (dvdec->next_ts >= dvdec->end_position)) {
776 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_SEGMENT_DONE)));
778 gst_pad_push (pad, GST_DATA (gst_event_new (GST_EVENT_EOS)));
783 gst_dvdec_loop (GstElement * element)
786 GstBuffer *buf, *outbuf;
789 guint32 length, got_bytes;
793 dvdec = GST_DVDEC (element);
796 * Apparently dv_parse_header can read from the body of the frame
797 * too, so it needs more than header_size bytes. Wacky!
799 if (dvdec->found_header)
800 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
802 length = NTSC_BUFFER;
804 /* first read enough bytes to parse the header */
805 got_bytes = gst_bytestream_peek_bytes (dvdec->bs, &inframe, length);
806 if (got_bytes < length) {
807 gst_dvdec_handle_sink_event (dvdec);
810 if (dv_parse_header (dvdec->decoder, inframe) < 0) {
811 GST_ELEMENT_ERROR (dvdec, STREAM, DECODE, (NULL), (NULL));
815 /* after parsing the header we know the length of the data */
816 dvdec->PAL = dv_system_50_fields (dvdec->decoder);
817 dvdec->found_header = TRUE;
819 fps = (dvdec->PAL ? PAL_FRAMERATE : NTSC_FRAMERATE);
820 height = (dvdec->PAL ? PAL_HEIGHT : NTSC_HEIGHT);
821 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
823 if (length != dvdec->length) {
824 dvdec->length = length;
825 gst_bytestream_size_hint (dvdec->bs, length);
828 /* then read the read data */
829 got_bytes = gst_bytestream_read (dvdec->bs, &buf, length);
830 if (got_bytes < length) {
831 gst_dvdec_handle_sink_event (dvdec);
836 dvdec->next_ts += GST_SECOND / dvdec->framerate;
838 dv_parse_packs (dvdec->decoder, GST_BUFFER_DATA (buf));
840 if (GST_PAD_IS_LINKED (dvdec->audiosrcpad)) {
844 dv_decode_full_audio (dvdec->decoder, GST_BUFFER_DATA (buf),
845 dvdec->audio_buffers);
847 if ((dvdec->decoder->audio->frequency != dvdec->frequency) ||
848 (dvdec->decoder->audio->num_channels != dvdec->channels)) {
849 if (!gst_pad_set_explicit_caps (dvdec->audiosrcpad,
850 gst_caps_new_simple ("audio/x-raw-int",
851 "rate", G_TYPE_INT, dvdec->decoder->audio->frequency,
852 "depth", G_TYPE_INT, 16,
853 "width", G_TYPE_INT, 16,
854 "signed", G_TYPE_BOOLEAN, TRUE,
855 "channels", G_TYPE_INT, dvdec->decoder->audio->num_channels,
856 "endianness", G_TYPE_INT, G_LITTLE_ENDIAN, NULL))) {
857 gst_buffer_unref (buf);
858 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL), (NULL));
862 dvdec->frequency = dvdec->decoder->audio->frequency;
863 dvdec->channels = dvdec->decoder->audio->num_channels;
866 outbuf = gst_buffer_new ();
867 GST_BUFFER_SIZE (outbuf) = dvdec->decoder->audio->samples_this_frame *
868 sizeof (gint16) * dvdec->decoder->audio->num_channels;
869 GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
871 a_ptr = (gint16 *) GST_BUFFER_DATA (outbuf);
873 for (i = 0; i < dvdec->decoder->audio->samples_this_frame; i++) {
874 for (j = 0; j < dvdec->decoder->audio->num_channels; j++) {
875 *(a_ptr++) = dvdec->audio_buffers[j][i];
878 gst_dvdec_push (dvdec, outbuf, dvdec->audiosrcpad, ts);
881 if (GST_PAD_IS_LINKED (dvdec->videosrcpad)) {
883 guint8 *outframe_ptrs[3];
884 gint outframe_pitches[3];
886 if ((dvdec->framerate != fps) || (dvdec->height != height)) {
887 dvdec->height = height;
888 dvdec->framerate = fps;
890 if (GST_PAD_LINK_FAILED (gst_pad_renegotiate (dvdec->videosrcpad))) {
891 GST_ELEMENT_ERROR (dvdec, CORE, NEGOTIATION, (NULL), (NULL));
896 outbuf = gst_buffer_new_and_alloc ((720 * height) * dvdec->bpp);
898 outframe = GST_BUFFER_DATA (outbuf);
900 outframe_ptrs[0] = outframe;
901 outframe_pitches[0] = 720 * dvdec->bpp;
903 /* the rest only matters for YUY2 */
904 if (dvdec->bpp < 3) {
905 outframe_ptrs[1] = outframe_ptrs[0] + 720 * height;
906 outframe_ptrs[2] = outframe_ptrs[1] + 360 * height;
908 outframe_pitches[1] = height / 2;
909 outframe_pitches[2] = outframe_pitches[1];
912 dv_decode_full_frame (dvdec->decoder, GST_BUFFER_DATA (buf),
913 dvdec->space, outframe_ptrs, outframe_pitches);
915 gst_dvdec_push (dvdec, outbuf, dvdec->videosrcpad, ts);
918 if ((dvdec->end_position != -1) &&
919 (dvdec->next_ts >= dvdec->end_position) && !dvdec->loop) {
920 gst_element_set_eos (GST_ELEMENT (dvdec));
923 if (dvdec->need_discont) {
924 dvdec->need_discont = FALSE;
927 gst_buffer_unref (buf);
930 static GstElementStateReturn
931 gst_dvdec_change_state (GstElement * element)
933 GstDVDec *dvdec = GST_DVDEC (element);
935 switch (GST_STATE_TRANSITION (element)) {
936 case GST_STATE_NULL_TO_READY:
938 case GST_STATE_READY_TO_PAUSED:
939 dvdec->bs = gst_bytestream_new (dvdec->sinkpad);
941 dv_decoder_new (0, dvdec->clamp_luma, dvdec->clamp_chroma);
942 dvdec->decoder->quality = qualities[dvdec->quality];
944 * Enable this function call when libdv2 0.100 or higher is more
947 /* dv_set_quality (dvdec->decoder, qualities [dvdec->quality]); */
949 case GST_STATE_PAUSED_TO_PLAYING:
951 case GST_STATE_PLAYING_TO_PAUSED:
953 case GST_STATE_PAUSED_TO_READY:
954 dv_decoder_free (dvdec->decoder);
955 dvdec->decoder = NULL;
956 dvdec->found_header = FALSE;
957 gst_bytestream_destroy (dvdec->bs);
959 case GST_STATE_READY_TO_NULL:
965 return parent_class->change_state (element);
968 /* Arguments are part of the Gtk+ object system, and these functions
969 * enable the element to respond to various arguments.
972 gst_dvdec_set_property (GObject * object, guint prop_id, const GValue * value,
977 /* It's not null if we got it, but it might not be ours */
978 g_return_if_fail (GST_IS_DVDEC (object));
980 /* Get a pointer of the right type. */
981 dvdec = GST_DVDEC (object);
983 /* Check the argument id to see which argument we're setting. */
986 dvdec->clamp_luma = g_value_get_boolean (value);
988 case ARG_CLAMP_CHROMA:
989 dvdec->clamp_chroma = g_value_get_boolean (value);
992 dvdec->quality = g_value_get_enum (value);
993 if ((dvdec->quality < 0) || (dvdec->quality > 5))
997 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1002 /* The set function is simply the inverse of the get fuction. */
1004 gst_dvdec_get_property (GObject * object, guint prop_id, GValue * value,
1009 /* It's not null if we got it, but it might not be ours */
1010 g_return_if_fail (GST_IS_DVDEC (object));
1011 dvdec = GST_DVDEC (object);
1014 case ARG_CLAMP_LUMA:
1015 g_value_set_boolean (value, dvdec->clamp_luma);
1017 case ARG_CLAMP_CHROMA:
1018 g_value_set_boolean (value, dvdec->clamp_chroma);
1021 g_value_set_enum (value, dvdec->quality);
1024 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
1029 /* This is the entry into the plugin itself. When the plugin loads,
1030 * this function is called to register everything that the plugin provides.
1033 plugin_init (GstPlugin * plugin)
1035 if (!gst_library_load ("gstbytestream"))
1038 if (!gst_element_register (plugin, "dvdec", GST_RANK_PRIMARY,
1039 gst_dvdec_get_type ()))
1045 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1048 "Uses libdv to decode DV video (libdv.sourceforge.net)",
1049 plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN);