1 /* GStreamer Jasper based j2k image decoder
2 * Copyright (C) 2008 Mark Nauwelaerts <mnauw@users.sf.net>
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.
21 * SECTION:element-jasperdec
23 * Decodes jpeg2000 images.
30 #include <gst/video/video.h>
33 #include <jasper/jasper.h>
35 #include "gstjasperdec.h"
37 GST_DEBUG_CATEGORY_STATIC (gst_jasper_dec_debug);
38 #define GST_CAT_DEFAULT gst_jasper_dec_debug
45 /* FIXME 0.11: Use a single caps name for jpeg2000 codestreams
46 * and drop the "boxed" variant
49 static GstStaticPadTemplate gst_jasper_dec_sink_template =
50 GST_STATIC_PAD_TEMPLATE ("sink",
53 GST_STATIC_CAPS ("image/x-j2c, "
54 "framerate = " GST_VIDEO_FPS_RANGE ", "
57 "framerate = " GST_VIDEO_FPS_RANGE ", "
58 "fields = (int) 1; " "image/jp2")
61 static GstStaticPadTemplate gst_jasper_dec_src_template =
62 GST_STATIC_PAD_TEMPLATE ("src",
65 GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB "; " GST_VIDEO_CAPS_BGR "; "
66 GST_VIDEO_CAPS_RGBx "; " GST_VIDEO_CAPS_xRGB "; "
67 GST_VIDEO_CAPS_BGRx "; " GST_VIDEO_CAPS_xBGR "; "
68 GST_VIDEO_CAPS_YUV ("{ I420, YV12, YUY2, UYVY, Y41B, Y42B, v308 }"))
71 static void gst_jasper_dec_reset (GstJasperDec * dec);
72 static GstStateChangeReturn gst_jasper_dec_change_state (GstElement * element,
73 GstStateChange transition);
74 static gboolean gst_jasper_dec_sink_setcaps (GstPad * pad, GstCaps * caps);
75 static GstFlowReturn gst_jasper_dec_chain (GstPad * pad, GstBuffer * buffer);
76 static gboolean gst_jasper_dec_src_event (GstPad * pad, GstEvent * event);
77 static gboolean gst_jasper_dec_sink_event (GstPad * pad, GstEvent * event);
78 static void gst_jasper_dec_update_qos (GstJasperDec * dec, gdouble proportion,
80 static void gst_jasper_dec_reset_qos (GstJasperDec * dec);
81 static void gst_jasper_dec_read_qos (GstJasperDec * dec, gdouble * proportion,
85 * keep original naming but use unique name here for a happy type system
88 typedef GstJasperDec GstJp2kDec;
89 typedef GstJasperDecClass GstJp2kDecClass;
91 GST_BOILERPLATE (GstJp2kDec, gst_jasper_dec, GstElement, GST_TYPE_ELEMENT);
94 gst_jasper_dec_base_init (gpointer g_class)
96 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
98 gst_element_class_add_static_pad_template (element_class,
99 &gst_jasper_dec_src_template);
100 gst_element_class_add_static_pad_template (element_class,
101 &gst_jasper_dec_sink_template);
102 gst_element_class_set_details_simple (element_class,
103 "Jasper JPEG2000 image decoder", "Codec/Decoder/Image",
104 "Decodes JPEG2000 encoded images using jasper",
105 "Mark Nauwelaerts <mnauw@users.sf.net>");
108 /* initialize the plugin's class */
110 gst_jasper_dec_class_init (GstJasperDecClass * klass)
112 GstElementClass *gstelement_class;
114 gstelement_class = (GstElementClass *) klass;
116 GST_DEBUG_CATEGORY_INIT (gst_jasper_dec_debug, "jp2kdec", 0,
117 "Jasper JPEG2000 decoder");
119 gstelement_class->change_state =
120 GST_DEBUG_FUNCPTR (gst_jasper_dec_change_state);
124 gst_jasper_dec_init (GstJasperDec * dec, GstJasperDecClass * klass)
127 gst_pad_new_from_static_template (&gst_jasper_dec_sink_template, "sink");
128 gst_pad_set_setcaps_function (dec->sinkpad,
129 GST_DEBUG_FUNCPTR (gst_jasper_dec_sink_setcaps));
130 gst_pad_set_chain_function (dec->sinkpad,
131 GST_DEBUG_FUNCPTR (gst_jasper_dec_chain));
132 gst_pad_set_event_function (dec->sinkpad,
133 GST_DEBUG_FUNCPTR (gst_jasper_dec_sink_event));
134 gst_element_add_pad (GST_ELEMENT (dec), dec->sinkpad);
137 gst_pad_new_from_static_template (&gst_jasper_dec_src_template, "src");
138 gst_pad_use_fixed_caps (dec->srcpad);
139 gst_pad_set_event_function (dec->srcpad,
140 GST_DEBUG_FUNCPTR (gst_jasper_dec_src_event));
141 gst_element_add_pad (GST_ELEMENT (dec), dec->srcpad);
143 dec->codec_data = NULL;
145 gst_jasper_dec_reset (dec);
149 gst_jasper_dec_reset (GstJasperDec * dec)
152 gst_buffer_unref (dec->codec_data);
153 dec->codec_data = NULL;
158 dec->clrspc = JAS_CLRSPC_UNKNOWN;
159 dec->format = GST_VIDEO_FORMAT_UNKNOWN;
160 gst_jasper_dec_reset_qos (dec);
161 gst_segment_init (&dec->segment, GST_FORMAT_TIME);
166 gst_jasper_dec_sink_setcaps (GstPad * pad, GstCaps * caps)
169 const GValue *framerate;
171 const gchar *mimetype;
174 dec = GST_JASPER_DEC (GST_PAD_PARENT (pad));
175 s = gst_caps_get_structure (caps, 0);
176 mimetype = gst_structure_get_name (s);
178 /* reset negotiation */
181 dec->format = GST_VIDEO_FORMAT_UNKNOWN;
182 if (dec->codec_data) {
183 gst_buffer_unref (dec->codec_data);
184 dec->codec_data = NULL;
187 if (!strcmp (mimetype, "image/x-j2c") || !strcmp (mimetype, "image/x-jpc")) {
188 const GValue *codec_data;
191 /* we only handle single field, packetized input */
192 if (gst_structure_get_value (s, "framerate") == NULL)
194 if (gst_structure_get_int (s, "fields", &fields) && fields != 1)
197 if (!gst_structure_get_fourcc (s, "fourcc", &fourcc))
200 case GST_MAKE_FOURCC ('s', 'R', 'G', 'B'):
201 dec->clrspc = JAS_CLRSPC_SRGB;
203 case GST_MAKE_FOURCC ('s', 'Y', 'U', 'V'):
204 dec->clrspc = JAS_CLRSPC_SYCBCR;
211 dec->fmt = jas_image_strtofmt ((char *) "jpc");
212 /* strip the j2c box stuff it is embedded in */
213 if (!strcmp (mimetype, "image/x-jpc"))
218 codec_data = gst_structure_get_value (s, "codec_data");
220 dec->codec_data = gst_value_get_buffer (codec_data);
221 gst_buffer_ref (dec->codec_data);
223 } else if (!strcmp (mimetype, "image/jp2"))
224 dec->fmt = jas_image_strtofmt ((char *) "jp2");
229 if ((framerate = gst_structure_get_value (s, "framerate")) != NULL) {
230 dec->framerate_numerator = gst_value_get_fraction_numerator (framerate);
231 dec->framerate_denominator = gst_value_get_fraction_denominator (framerate);
232 GST_DEBUG_OBJECT (dec, "got framerate of %d/%d fps => packetized mode",
233 dec->framerate_numerator, dec->framerate_denominator);
235 dec->framerate_numerator = 0;
236 dec->framerate_denominator = 1;
237 GST_DEBUG_OBJECT (dec, "no framerate, assuming single image");
244 GST_WARNING_OBJECT (dec, "refused caps %" GST_PTR_FORMAT, caps);
250 gst_jasper_dec_negotiate (GstJasperDec * dec, jas_image_t * image)
252 GstFlowReturn flow_ret = GST_FLOW_OK;
253 gint width, height, channels;
255 gboolean negotiate = FALSE;
257 GstCaps *allowed_caps, *caps;
259 width = jas_image_width (image);
260 height = jas_image_height (image);
261 channels = jas_image_numcmpts (image);
263 GST_LOG_OBJECT (dec, "%d x %d, %d components", width, height, channels);
265 /* jp2c bitstream has no real colour space info (kept in container),
266 * so decoder may only pretend to know, where it really does not */
267 if (!jas_clrspc_isunknown (dec->clrspc)) {
268 clrspc = dec->clrspc;
269 GST_DEBUG_OBJECT (dec, "forcing container supplied colour space %d",
271 jas_image_setclrspc (image, clrspc);
273 clrspc = jas_image_clrspc (image);
275 if (!width || !height || !channels || jas_clrspc_isunknown (clrspc))
278 if (dec->width != width || dec->height != height ||
279 dec->channels != channels || dec->clrspc != clrspc)
285 for (i = 0; i < channels; i++) {
286 gint cheight, cwidth, depth, sgnd;
288 cheight = jas_image_cmptheight (image, i);
289 cwidth = jas_image_cmptwidth (image, i);
290 depth = jas_image_cmptprec (image, i);
291 sgnd = jas_image_cmptsgnd (image, i);
293 GST_LOG_OBJECT (dec, "image component %d, %dx%d, depth %d, sgnd %d", i,
294 cwidth, cheight, depth, sgnd);
296 if (depth != 8 || sgnd)
299 if (dec->cheight[i] != cheight || dec->cwidth[i] != cwidth) {
300 dec->cheight[i] = cheight;
301 dec->cwidth[i] = cwidth;
306 if (!negotiate && dec->format != GST_VIDEO_FORMAT_UNKNOWN)
309 /* clear and refresh to new state */
310 flow_ret = GST_FLOW_NOT_NEGOTIATED;
311 dec->format = GST_VIDEO_FORMAT_UNKNOWN;
313 dec->height = height;
314 dec->channels = channels;
316 /* retrieve allowed caps, and find the first one that reasonably maps
317 * to the parameters of the colourspace */
318 caps = gst_pad_get_allowed_caps (dec->srcpad);
320 GST_DEBUG_OBJECT (dec, "... but no peer, using template caps");
321 /* need to copy because get_allowed_caps returns a ref,
322 and get_pad_template_caps doesn't */
323 caps = gst_caps_copy (gst_pad_get_pad_template_caps (dec->srcpad));
325 /* avoid lists of fourcc, etc */
326 allowed_caps = gst_caps_normalize (caps);
327 gst_caps_unref (caps);
329 GST_LOG_OBJECT (dec, "allowed source caps %" GST_PTR_FORMAT, allowed_caps);
331 for (i = 0; i < gst_caps_get_size (allowed_caps); i++) {
332 GstVideoFormat format;
336 gst_caps_unref (caps);
337 caps = gst_caps_copy_nth (allowed_caps, i);
338 /* sigh, ds and _parse_caps need fixed caps for parsing, fixate */
339 gst_pad_fixate_caps (dec->srcpad, caps);
340 GST_LOG_OBJECT (dec, "checking caps %" GST_PTR_FORMAT, caps);
341 if (!gst_video_format_parse_caps (caps, &format, NULL, NULL))
343 if (gst_video_format_is_rgb (format) &&
344 jas_clrspc_fam (clrspc) == JAS_CLRSPC_FAM_RGB) {
345 GST_DEBUG_OBJECT (dec, "trying RGB");
346 if ((dec->cmpt[0] = jas_image_getcmptbytype (image,
347 JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_RGB_R))) < 0 ||
348 (dec->cmpt[1] = jas_image_getcmptbytype (image,
349 JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_RGB_G))) < 0 ||
350 (dec->cmpt[2] = jas_image_getcmptbytype (image,
351 JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_RGB_B))) < 0) {
352 GST_DEBUG_OBJECT (dec, "missing RGB color component");
355 } else if (gst_video_format_is_yuv (format) &&
356 jas_clrspc_fam (clrspc) == JAS_CLRSPC_FAM_YCBCR) {
357 GST_DEBUG_OBJECT (dec, "trying YUV");
358 if ((dec->cmpt[0] = jas_image_getcmptbytype (image,
359 JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_YCBCR_Y))) < 0 ||
360 (dec->cmpt[1] = jas_image_getcmptbytype (image,
361 JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_YCBCR_CB))) < 0 ||
362 (dec->cmpt[2] = jas_image_getcmptbytype (image,
363 JAS_IMAGE_CT_COLOR (JAS_CLRSPC_CHANIND_YCBCR_CR))) < 0) {
364 GST_DEBUG_OBJECT (dec, "missing YUV color component");
369 /* match format with validity checks */
371 for (j = 0; j < channels; j++) {
375 if (dec->cwidth[cmpt] != gst_video_format_get_component_width (format, j,
377 dec->cheight[cmpt] != gst_video_format_get_component_height (format,
381 /* commit to this format */
383 dec->format = format;
389 gst_caps_unref (caps);
390 gst_caps_unref (allowed_caps);
392 if (dec->format != GST_VIDEO_FORMAT_UNKNOWN) {
393 /* cache some video format properties */
394 for (j = 0; j < channels; ++j) {
395 dec->offset[j] = gst_video_format_get_component_offset (dec->format, j,
396 dec->width, dec->height);
397 dec->inc[j] = gst_video_format_get_pixel_stride (dec->format, j);
398 dec->stride[j] = gst_video_format_get_row_stride (dec->format, j,
401 dec->image_size = gst_video_format_get_size (dec->format, width, height);
402 dec->alpha = gst_video_format_has_alpha (dec->format);
406 dec->buf = g_new0 (glong, dec->width);
408 caps = gst_video_format_new_caps (dec->format, dec->width, dec->height,
409 dec->framerate_numerator, dec->framerate_denominator, 1, 1);
411 GST_DEBUG_OBJECT (dec, "Set format to %d, size to %dx%d", dec->format,
412 dec->width, dec->height);
414 if (!gst_pad_set_caps (dec->srcpad, caps))
415 flow_ret = GST_FLOW_NOT_NEGOTIATED;
417 flow_ret = GST_FLOW_OK;
419 gst_caps_unref (caps);
428 GST_DEBUG_OBJECT (dec, "Failed to process decoded image.");
429 flow_ret = GST_FLOW_NOT_NEGOTIATED;
434 GST_DEBUG_OBJECT (dec, "Decoded image has unsupported colour space.");
435 GST_ELEMENT_ERROR (dec, STREAM, DECODE, (NULL), ("Unsupported colorspace"));
436 flow_ret = GST_FLOW_ERROR;
442 gst_jasper_dec_get_picture (GstJasperDec * dec, guint8 * data,
443 guint size, GstBuffer ** outbuf)
445 GstFlowReturn ret = GST_FLOW_OK;
446 jas_stream_t *stream = NULL;
447 jas_image_t *image = NULL;
450 g_return_val_if_fail (outbuf != NULL, GST_FLOW_ERROR);
454 if (!(stream = jas_stream_memopen ((gpointer) data, size)))
457 if (!(image = jas_image_decode (stream, dec->fmt, (char *) "")))
460 ret = gst_jasper_dec_negotiate (dec, image);
461 if (ret != GST_FLOW_OK)
464 ret = gst_pad_alloc_buffer_and_set_caps (dec->srcpad,
465 GST_BUFFER_OFFSET_NONE,
466 dec->image_size, GST_PAD_CAPS (dec->srcpad), outbuf);
468 if (ret != GST_FLOW_OK)
472 memset (GST_BUFFER_DATA (*outbuf), 0xff, dec->image_size);
474 for (i = 0; i < dec->channels; ++i) {
475 gint x, y, cwidth, cheight, inc, stride, cmpt;
476 guint8 *row_pix, *out_pix;
480 stride = dec->stride[i];
482 cheight = dec->cheight[cmpt];
483 cwidth = dec->cwidth[cmpt];
486 "retrieve component %d<=%d, size %dx%d, offset %d, inc %d, stride %d",
487 i, cmpt, cwidth, cheight, dec->offset[i], inc, stride);
489 out_pix = GST_BUFFER_DATA (*outbuf) + dec->offset[i];
491 for (y = 0; y < cheight; y++) {
494 if (jas_image_readcmpt2 (image, i, 0, y, cwidth, 1, dec->buf))
496 for (x = 0; x < cwidth; x++) {
501 out_pix = row_pix + stride;
505 GST_LOG_OBJECT (dec, "all components retrieved");
509 jas_image_destroy (image);
511 jas_stream_close (stream);
518 GST_DEBUG_OBJECT (dec, "Failed to create inputstream.");
523 GST_DEBUG_OBJECT (dec, "Failed to decode image.");
528 GST_DEBUG_OBJECT (dec, "Failed to process decoded image.");
534 gst_buffer_unref (*outbuf);
536 GST_ELEMENT_WARNING (dec, STREAM, DECODE, (NULL), (NULL));
542 GST_DEBUG_OBJECT (dec, "Failed to create outbuffer - %s",
543 gst_flow_get_name (ret));
548 GST_DEBUG_OBJECT (dec, "Failed to determine output caps.");
553 /* Perform qos calculations before decoding the next frame. Returns TRUE if the
554 * frame should be decoded, FALSE if the frame can be dropped entirely */
556 gst_jasper_dec_do_qos (GstJasperDec * dec, GstClockTime timestamp)
558 GstClockTime qostime, earliest_time;
561 /* no timestamp, can't do QoS => decode frame */
562 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (timestamp))) {
563 GST_LOG_OBJECT (dec, "invalid timestamp, can't do QoS, decode frame");
567 /* get latest QoS observation values */
568 gst_jasper_dec_read_qos (dec, &proportion, &earliest_time);
570 /* skip qos if we have no observation (yet) => decode frame */
571 if (G_UNLIKELY (!GST_CLOCK_TIME_IS_VALID (earliest_time))) {
572 GST_LOG_OBJECT (dec, "no observation yet, decode frame");
576 /* qos is done on running time */
577 qostime = gst_segment_to_running_time (&dec->segment, GST_FORMAT_TIME,
580 /* see how our next timestamp relates to the latest qos timestamp */
581 GST_LOG_OBJECT (dec, "qostime %" GST_TIME_FORMAT ", earliest %"
582 GST_TIME_FORMAT, GST_TIME_ARGS (qostime), GST_TIME_ARGS (earliest_time));
584 if (qostime != GST_CLOCK_TIME_NONE && qostime <= earliest_time) {
585 GST_DEBUG_OBJECT (dec, "we are late, drop frame");
589 GST_LOG_OBJECT (dec, "decode frame");
594 gst_jasper_dec_chain (GstPad * pad, GstBuffer * buf)
597 GstFlowReturn ret = GST_FLOW_OK;
599 GstBuffer *outbuf = NULL;
604 dec = GST_JASPER_DEC (GST_PAD_PARENT (pad));
609 ts = GST_BUFFER_TIMESTAMP (buf);
611 GST_LOG_OBJECT (dec, "buffer with ts: %" GST_TIME_FORMAT, GST_TIME_ARGS (ts));
613 if (GST_BUFFER_FLAG_IS_SET (buf, GST_BUFFER_FLAG_DISCONT))
616 decode = gst_jasper_dec_do_qos (dec, ts);
618 /* FIXME: do clipping */
620 if (G_UNLIKELY (!decode)) {
625 /* strip possible prefix */
629 tmp = gst_buffer_create_sub (buf, dec->strip,
630 GST_BUFFER_SIZE (buf) - dec->strip);
631 gst_buffer_copy_metadata (tmp, buf, GST_BUFFER_COPY_TIMESTAMPS);
632 gst_buffer_unref (buf);
635 /* preprend possible codec_data */
636 if (dec->codec_data) {
639 tmp = gst_buffer_merge (dec->codec_data, buf);
640 gst_buffer_copy_metadata (tmp, buf, GST_BUFFER_COPY_TIMESTAMPS);
641 gst_buffer_unref (buf);
645 /* now really feed the data to decoder */
646 data = GST_BUFFER_DATA (buf);
647 size = GST_BUFFER_SIZE (buf);
649 ret = gst_jasper_dec_get_picture (dec, data, size, &outbuf);
652 gst_buffer_copy_metadata (outbuf, buf, GST_BUFFER_COPY_TIMESTAMPS);
654 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DISCONT);
655 dec->discont = FALSE;
658 if (ret == GST_FLOW_OK)
659 ret = gst_pad_push (dec->srcpad, outbuf);
661 gst_buffer_unref (outbuf);
665 gst_buffer_unref (buf);
672 GST_ELEMENT_ERROR (dec, CORE, NEGOTIATION, (NULL),
673 ("format wasn't negotiated before chain function"));
674 ret = GST_FLOW_NOT_NEGOTIATED;
680 gst_jasper_dec_update_qos (GstJasperDec * dec, gdouble proportion,
683 GST_OBJECT_LOCK (dec);
684 dec->proportion = proportion;
685 dec->earliest_time = time;
686 GST_OBJECT_UNLOCK (dec);
690 gst_jasper_dec_reset_qos (GstJasperDec * dec)
692 gst_jasper_dec_update_qos (dec, 0.5, GST_CLOCK_TIME_NONE);
696 gst_jasper_dec_read_qos (GstJasperDec * dec, gdouble * proportion,
699 GST_OBJECT_LOCK (dec);
700 *proportion = dec->proportion;
701 *time = dec->earliest_time;
702 GST_OBJECT_UNLOCK (dec);
706 gst_jasper_dec_src_event (GstPad * pad, GstEvent * event)
711 dec = GST_JASPER_DEC (gst_pad_get_parent (pad));
713 switch (GST_EVENT_TYPE (event)) {
715 GstClockTimeDiff diff;
716 GstClockTime timestamp;
719 gst_event_parse_qos (event, &proportion, &diff, ×tamp);
721 gst_jasper_dec_update_qos (dec, proportion, timestamp + diff);
728 res = gst_pad_push_event (dec->sinkpad, event);
730 gst_object_unref (dec);
735 gst_jasper_dec_sink_event (GstPad * pad, GstEvent * event)
738 gboolean res = FALSE;
740 dec = GST_JASPER_DEC (gst_pad_get_parent (pad));
742 switch (GST_EVENT_TYPE (event)) {
743 case GST_EVENT_FLUSH_STOP:
744 gst_jasper_dec_reset_qos (dec);
745 gst_segment_init (&dec->segment, GST_FORMAT_TIME);
748 case GST_EVENT_NEWSEGMENT:{
751 gint64 start, stop, time;
754 gst_event_parse_new_segment_full (event, &update, &rate, &arate, &fmt,
755 &start, &stop, &time);
758 case GST_FORMAT_TIME:
759 /* great, our native segment format */
761 case GST_FORMAT_BYTES:
763 if (start != 0 || time != 0)
764 goto invalid_bytes_segment;
765 /* create bogus segment in TIME format, starting from 0 */
766 gst_event_unref (event);
767 fmt = GST_FORMAT_TIME;
771 event = gst_event_new_new_segment (update, rate, fmt, start, stop,
779 gst_segment_set_newsegment_full (&dec->segment, update, rate, arate,
780 fmt, start, stop, time);
782 GST_DEBUG_OBJECT (dec, "NEWSEGMENT %" GST_SEGMENT_FORMAT, &dec->segment);
789 res = gst_pad_push_event (dec->srcpad, event);
793 gst_object_unref (dec);
799 GST_WARNING_OBJECT (dec, "unknown format received in NEWSEGMENT event");
800 gst_event_unref (event);
803 invalid_bytes_segment:
805 GST_WARNING_OBJECT (dec, "can't handle NEWSEGMENT event in BYTES format "
806 "with a non-0 start or non-0 time value");
807 gst_event_unref (event);
812 static GstStateChangeReturn
813 gst_jasper_dec_change_state (GstElement * element, GstStateChange transition)
815 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
816 GstJasperDec *dec = GST_JASPER_DEC (element);
818 switch (transition) {
819 case GST_STATE_CHANGE_NULL_TO_READY:
823 case GST_STATE_CHANGE_READY_TO_PAUSED:
829 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
830 if (ret == GST_STATE_CHANGE_FAILURE)
833 switch (transition) {
834 case GST_STATE_CHANGE_PAUSED_TO_READY:
835 gst_jasper_dec_reset (dec);
837 case GST_STATE_CHANGE_READY_TO_NULL:
849 GST_ELEMENT_ERROR (dec, LIBRARY, INIT, (NULL), (NULL));
850 return GST_STATE_CHANGE_FAILURE;