2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 * <2005> Wim Taymans <wim@fluendo.com>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 * Boston, MA 02111-1307, USA.
22 * SECTION:element-dvdec
26 * dvdec decodes DV video into raw video. The element expects a full DV frame
27 * as input, which is 120000 bytes for NTSC and 144000 for PAL video.
30 * This element can perform simple frame dropping with the drop-factor
31 * property. Setting this property to a value N > 1 will only decode every
34 * <title>Example launch line</title>
37 * gst-launch filesrc location=test.dv ! dvdemux name=demux ! dvdec ! xvimagesink
39 * This pipeline decodes and renders the raw DV stream to a videosink.
41 * Last reviewed on 2006-02-28 (0.10.3)
54 static const GstElementDetails dvdec_details =
55 GST_ELEMENT_DETAILS ("DV video decoder",
56 "Codec/Decoder/Video",
57 "Uses libdv to decode DV video (smpte314) (libdv.sourceforge.net)",
58 "Erik Walthinsen <omega@cse.ogi.edu>," "Wim Taymans <wim@fluendo.com>");
60 /* sizes of one input buffer */
61 #define NTSC_BUFFER 120000
62 #define PAL_BUFFER 144000
64 #define DV_DEFAULT_QUALITY DV_QUALITY_BEST
65 #define DV_DEFAULT_DECODE_NTH 1
67 GST_DEBUG_CATEGORY (dvdec_debug);
68 #define GST_CAT_DEFAULT dvdec_debug
79 const gint qualities[] = {
83 DV_QUALITY_DC | DV_QUALITY_COLOR,
84 DV_QUALITY_AC_1 | DV_QUALITY_COLOR,
85 DV_QUALITY_AC_2 | DV_QUALITY_COLOR
88 static GstStaticPadTemplate sink_temp = GST_STATIC_PAD_TEMPLATE ("sink",
91 GST_STATIC_CAPS ("video/x-dv, systemstream = (boolean) false")
94 static GstStaticPadTemplate src_temp = GST_STATIC_PAD_TEMPLATE ("src",
97 GST_STATIC_CAPS ("video/x-raw-yuv, "
98 "format = (fourcc) YUY2, "
100 "framerate = (fraction) [ 1/1, 60/1 ];"
104 "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", "
105 "red_mask = (int) 0x0000ff00, "
106 "green_mask = (int) 0x00ff0000, "
107 "blue_mask = (int) 0xff000000, "
108 "width = (int) 720, "
109 "framerate = (fraction) [ 1/1, 60/1 ];"
113 "endianness = (int) " G_STRINGIFY (G_BIG_ENDIAN) ", "
114 "red_mask = (int) 0x00ff0000, "
115 "green_mask = (int) 0x0000ff00, "
116 "blue_mask = (int) 0x000000ff, "
117 "width = (int) 720, " "framerate = (fraction) [ 1/1, 60/1 ]")
120 #define GST_TYPE_DVDEC_QUALITY (gst_dvdec_quality_get_type())
122 gst_dvdec_quality_get_type (void)
124 static GType qtype = 0;
127 static const GEnumValue values[] = {
128 {0, "Monochrome, DC (Fastest)", "fastest"},
129 {1, "Monochrome, first AC coefficient", "monochrome-ac"},
130 {2, "Monochrome, highest quality", "monochrome-best"},
131 {3, "Colour, DC, fastest", "colour-fastest"},
132 {4, "Colour, using only the first AC coefficient", "colour-ac"},
133 {5, "Highest quality colour decoding", "best"},
137 qtype = g_enum_register_static ("GstDVDecQualityEnum", values);
142 GST_BOILERPLATE (GstDVDec, gst_dvdec, GstElement, GST_TYPE_ELEMENT);
144 static gboolean gst_dvdec_sink_setcaps (GstPad * pad, GstCaps * caps);
145 static GstFlowReturn gst_dvdec_chain (GstPad * pad, GstBuffer * buffer);
146 static gboolean gst_dvdec_sink_event (GstPad * pad, GstEvent * event);
148 static GstStateChangeReturn gst_dvdec_change_state (GstElement * element,
149 GstStateChange transition);
151 static void gst_dvdec_set_property (GObject * object, guint prop_id,
152 const GValue * value, GParamSpec * pspec);
153 static void gst_dvdec_get_property (GObject * object, guint prop_id,
154 GValue * value, GParamSpec * pspec);
157 gst_dvdec_base_init (gpointer g_class)
159 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
161 gst_element_class_add_pad_template (element_class,
162 gst_static_pad_template_get (&sink_temp));
163 gst_element_class_add_pad_template (element_class,
164 gst_static_pad_template_get (&src_temp));
166 gst_element_class_set_details (element_class, &dvdec_details);
168 GST_DEBUG_CATEGORY_INIT (dvdec_debug, "dvdec", 0, "DV decoding element");
172 gst_dvdec_class_init (GstDVDecClass * klass)
174 GObjectClass *gobject_class;
175 GstElementClass *gstelement_class;
177 gobject_class = (GObjectClass *) klass;
178 gstelement_class = (GstElementClass *) klass;
180 gobject_class->set_property = gst_dvdec_set_property;
181 gobject_class->get_property = gst_dvdec_get_property;
183 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CLAMP_LUMA,
184 g_param_spec_boolean ("clamp_luma", "Clamp luma", "Clamp luma",
185 FALSE, G_PARAM_READWRITE));
186 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_CLAMP_CHROMA,
187 g_param_spec_boolean ("clamp_chroma", "Clamp chroma", "Clamp chroma",
188 FALSE, G_PARAM_READWRITE));
189 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_QUALITY,
190 g_param_spec_enum ("quality", "Quality", "Decoding quality",
191 GST_TYPE_DVDEC_QUALITY, DV_DEFAULT_QUALITY, G_PARAM_READWRITE));
192 g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_DECODE_NTH,
193 g_param_spec_int ("drop-factor", "Drop Factor", "Only decode Nth frame",
194 1, G_MAXINT, DV_DEFAULT_DECODE_NTH, G_PARAM_READWRITE));
196 gstelement_class->change_state = gst_dvdec_change_state;
198 /* table initialization, only do once */
203 gst_dvdec_init (GstDVDec * dvdec, GstDVDecClass * g_class)
206 gst_pad_new_from_template (gst_static_pad_template_get (&sink_temp),
208 gst_pad_set_setcaps_function (dvdec->sinkpad,
209 GST_DEBUG_FUNCPTR (gst_dvdec_sink_setcaps));
210 gst_pad_set_chain_function (dvdec->sinkpad, gst_dvdec_chain);
211 gst_pad_set_event_function (dvdec->sinkpad, gst_dvdec_sink_event);
212 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->sinkpad);
215 gst_pad_new_from_template (gst_static_pad_template_get (&src_temp),
218 gst_pad_use_fixed_caps (dvdec->srcpad);
220 gst_element_add_pad (GST_ELEMENT (dvdec), dvdec->srcpad);
222 dvdec->framerate_numerator = 0;
223 dvdec->framerate_denominator = 0;
226 dvdec->drop_factor = 1;
228 dvdec->clamp_luma = FALSE;
229 dvdec->clamp_chroma = FALSE;
230 dvdec->quality = DV_DEFAULT_QUALITY;
234 gst_dvdec_sink_setcaps (GstPad * pad, GstCaps * caps)
239 gboolean gotpar = FALSE;
240 const GValue *par = NULL, *rate = NULL;
242 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
244 /* first parse the caps */
245 s = gst_caps_get_structure (caps, 0);
247 if (!gst_structure_get_int (s, "height", &dvdec->height))
249 if ((par = gst_structure_get_value (s, "pixel-aspect-ratio")))
251 if (!(rate = gst_structure_get_value (s, "framerate")))
254 dvdec->framerate_numerator = gst_value_get_fraction_numerator (rate);
255 dvdec->framerate_denominator = gst_value_get_fraction_denominator (rate);
257 /* ignoring rgb, bgr0 for now */
261 othercaps = gst_caps_new_simple ("video/x-raw-yuv",
262 "format", GST_TYPE_FOURCC, GST_STR_FOURCC ("YUY2"),
263 "width", G_TYPE_INT, 720,
264 "height", G_TYPE_INT, dvdec->height,
265 "framerate", GST_TYPE_FRACTION, dvdec->framerate_numerator,
266 dvdec->framerate_denominator, NULL);
268 gst_structure_set_value (gst_caps_get_structure (othercaps, 0),
269 "pixel-aspect-ratio", par);
271 gst_pad_set_caps (dvdec->srcpad, othercaps);
273 gst_caps_unref (othercaps);
275 gst_object_unref (dvdec);
281 gst_object_unref (dvdec);
288 gst_dvdec_sink_event (GstPad * pad, GstEvent * event)
293 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
295 switch (GST_EVENT_TYPE (event)) {
296 case GST_EVENT_NEWSEGMENT:{
300 gint64 start, stop, position;
302 /* Once -good depends on core >= 0.10.6, use newsegment_full */
303 gst_event_parse_new_segment (event, &update, &rate, &format,
304 &start, &stop, &position);
305 GST_DEBUG_OBJECT (dvdec, "Got NEWSEGMENT [%" GST_TIME_FORMAT
306 " - %" GST_TIME_FORMAT " / %" GST_TIME_FORMAT "]",
307 GST_TIME_ARGS (start), GST_TIME_ARGS (stop),
308 GST_TIME_ARGS (position));
309 gst_segment_set_newsegment (dvdec->segment, update, rate, format,
310 start, stop, position);
317 res = gst_pad_push_event (dvdec->srcpad, event);
323 gst_dvdec_chain (GstPad * pad, GstBuffer * buf)
328 guint8 *outframe_ptrs[3];
329 gint outframe_pitches[3];
331 GstFlowReturn ret = GST_FLOW_OK;
333 gint64 cstart, cstop;
335 dvdec = GST_DVDEC (gst_pad_get_parent (pad));
336 inframe = GST_BUFFER_DATA (buf);
338 /* buffer should be at least the size of one NTSC frame, this should
339 * be enough to decode the header. */
340 if (G_UNLIKELY (GST_BUFFER_SIZE (buf) < NTSC_BUFFER))
343 /* preliminary dropping. unref and return if outside of configured segment */
344 if ((dvdec->segment->format == GST_FORMAT_TIME) &&
345 (!(gst_segment_clip (dvdec->segment, GST_FORMAT_TIME,
346 GST_BUFFER_TIMESTAMP (buf),
347 GST_BUFFER_TIMESTAMP (buf) + GST_BUFFER_DURATION (buf),
351 if (G_UNLIKELY (dv_parse_header (dvdec->decoder, inframe) < 0))
352 goto parse_header_error;
354 /* check the buffer is of right size after we know if we are
355 * dealing with PAL or NTSC */
356 length = (dvdec->PAL ? PAL_BUFFER : NTSC_BUFFER);
357 if (G_UNLIKELY (GST_BUFFER_SIZE (buf) < length))
360 dv_parse_packs (dvdec->decoder, inframe);
362 if (dvdec->video_offset % dvdec->drop_factor != 0)
366 gst_pad_alloc_buffer_and_set_caps (dvdec->srcpad, 0,
367 (720 * dvdec->height) * dvdec->bpp,
368 GST_PAD_CAPS (dvdec->srcpad), &outbuf);
369 if (G_UNLIKELY (ret != GST_FLOW_OK))
372 outframe = GST_BUFFER_DATA (outbuf);
374 outframe_ptrs[0] = outframe;
375 outframe_pitches[0] = 720 * dvdec->bpp;
377 /* the rest only matters for YUY2 */
378 if (dvdec->bpp < 3) {
379 outframe_ptrs[1] = outframe_ptrs[0] + 720 * dvdec->height;
380 outframe_ptrs[2] = outframe_ptrs[1] + 360 * dvdec->height;
382 outframe_pitches[1] = dvdec->height / 2;
383 outframe_pitches[2] = outframe_pitches[1];
386 GST_DEBUG_OBJECT (dvdec, "decoding and pushing buffer");
387 dv_decode_full_frame (dvdec->decoder, inframe,
388 e_dv_color_yuv, outframe_ptrs, outframe_pitches);
390 GST_BUFFER_OFFSET (outbuf) = GST_BUFFER_OFFSET (buf);
391 GST_BUFFER_OFFSET_END (outbuf) = GST_BUFFER_OFFSET_END (buf);
392 GST_BUFFER_TIMESTAMP (outbuf) = cstart;
393 GST_BUFFER_DURATION (outbuf) = cstop - cstart;
395 ret = gst_pad_push (dvdec->srcpad, outbuf);
398 dvdec->video_offset++;
401 gst_buffer_unref (buf);
402 gst_object_unref (dvdec);
409 GST_ELEMENT_ERROR (dvdec, STREAM, DECODE,
410 (NULL), ("Input buffer too small"));
411 ret = GST_FLOW_ERROR;
416 GST_ELEMENT_ERROR (dvdec, STREAM, DECODE,
417 (NULL), ("Error parsing DV header"));
418 ret = GST_FLOW_ERROR;
423 GST_DEBUG_OBJECT (dvdec, "could not allocate buffer");
429 GST_DEBUG_OBJECT (dvdec,
430 "dropping buffer since it's out of the configured segment");
435 static GstStateChangeReturn
436 gst_dvdec_change_state (GstElement * element, GstStateChange transition)
438 GstDVDec *dvdec = GST_DVDEC (element);
439 GstStateChangeReturn ret;
442 switch (transition) {
443 case GST_STATE_CHANGE_NULL_TO_READY:
445 case GST_STATE_CHANGE_READY_TO_PAUSED:
447 dv_decoder_new (0, dvdec->clamp_luma, dvdec->clamp_chroma);
448 dvdec->decoder->quality = qualities[dvdec->quality];
449 dv_set_error_log (dvdec->decoder, NULL);
450 dvdec->segment = gst_segment_new ();
451 gst_segment_init (dvdec->segment, GST_FORMAT_UNDEFINED);
453 * Enable this function call when libdv2 0.100 or higher is more
456 /* dv_set_quality (dvdec->decoder, qualities [dvdec->quality]); */
458 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
464 ret = parent_class->change_state (element, transition);
466 switch (transition) {
467 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
469 case GST_STATE_CHANGE_PAUSED_TO_READY:
470 dv_decoder_free (dvdec->decoder);
471 dvdec->decoder = NULL;
472 gst_segment_free (dvdec->segment);
473 dvdec->segment = NULL;
475 case GST_STATE_CHANGE_READY_TO_NULL:
484 gst_dvdec_set_property (GObject * object, guint prop_id, const GValue * value,
487 GstDVDec *dvdec = GST_DVDEC (object);
490 case PROP_CLAMP_LUMA:
491 dvdec->clamp_luma = g_value_get_boolean (value);
493 case PROP_CLAMP_CHROMA:
494 dvdec->clamp_chroma = g_value_get_boolean (value);
497 dvdec->quality = g_value_get_enum (value);
498 if ((dvdec->quality < 0) || (dvdec->quality > 5))
501 case PROP_DECODE_NTH:
502 dvdec->drop_factor = g_value_get_int (value);
505 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
511 gst_dvdec_get_property (GObject * object, guint prop_id, GValue * value,
514 GstDVDec *dvdec = GST_DVDEC (object);
517 case PROP_CLAMP_LUMA:
518 g_value_set_boolean (value, dvdec->clamp_luma);
520 case PROP_CLAMP_CHROMA:
521 g_value_set_boolean (value, dvdec->clamp_chroma);
524 g_value_set_enum (value, dvdec->quality);
526 case PROP_DECODE_NTH:
527 g_value_set_int (value, dvdec->drop_factor);
530 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);