51c47e66d6522f0eac92148cf39875c26aa0b4ec
1 /* GStreamer
2 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
3 *
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.
8 *
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.
13 *
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.
18 */
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
23 #include <string.h>
25 #include <inttypes.h>
27 #include "gstmpeg2dec.h"
29 /* 16byte-aligns a buffer for libmpeg2 */
30 #define ALIGN_16(p) ((void *)(((uintptr_t)(p) + 15) & ~((uintptr_t)15)))
32 /* mpeg2dec changed a struct name after 0.3.1, here's a workaround */
33 /* mpeg2dec also only defined MPEG2_RELEASE after 0.3.1
34 #if MPEG2_RELEASE < MPEG2_VERSION(0,3,2)
35 */
36 #ifndef MPEG2_RELEASE
37 #define MPEG2_VERSION(a,b,c) ((((a)&0xff)<<16)|(((b)&0xff)<<8)|((c)&0xff))
38 #define MPEG2_RELEASE MPEG2_VERSION(0,3,1)
39 typedef picture_t mpeg2_picture_t;
40 typedef gint mpeg2_state_t;
42 #define STATE_BUFFER 0
43 #endif
45 GST_DEBUG_CATEGORY_STATIC (mpeg2dec_debug);
46 #define GST_CAT_DEFAULT (mpeg2dec_debug)
48 /* Send a warning message about decoding errors after receiving this many
49 * STATE_INVALID return values from mpeg2_parse. -1 means never.
50 */
51 #define WARN_THRESHOLD (5)
53 //#define enable_user_data
54 #ifdef enable_user_data
55 static GstStaticPadTemplate user_data_template_factory =
56 GST_STATIC_PAD_TEMPLATE ("user_data",
57 GST_PAD_SRC,
58 GST_PAD_ALWAYS,
59 GST_STATIC_CAPS_ANY);
60 #endif
62 static GstStaticPadTemplate sink_template_factory =
63 GST_STATIC_PAD_TEMPLATE ("sink",
64 GST_PAD_SINK,
65 GST_PAD_ALWAYS,
66 GST_STATIC_CAPS ("video/mpeg, "
67 "mpegversion = (int) [ 1, 2 ], " "systemstream = (boolean) false")
68 );
70 static GstStaticPadTemplate src_template_factory =
71 GST_STATIC_PAD_TEMPLATE ("src",
72 GST_PAD_SRC,
73 GST_PAD_ALWAYS,
74 GST_STATIC_CAPS ("video/x-raw-yuv, "
75 "format = (fourcc) { YV12, I420, Y42B, Y444 }, "
76 "width = (int) [ 16, 4096 ], "
77 "height = (int) [ 16, 4096 ], "
78 "framerate = (fraction) [ 0/1, 2147483647/1 ]")
79 );
81 static void gst_mpeg2dec_base_init (gpointer g_class);
82 static void gst_mpeg2dec_class_init (GstMpeg2decClass * klass);
83 static void gst_mpeg2dec_init (GstMpeg2dec * mpeg2dec);
85 static void gst_mpeg2dec_finalize (GObject * object);
86 static void gst_mpeg2dec_reset (GstMpeg2dec * mpeg2dec);
88 static void gst_mpeg2dec_set_index (GstElement * element, GstIndex * index);
89 static GstIndex *gst_mpeg2dec_get_index (GstElement * element);
91 static gboolean gst_mpeg2dec_src_event (GstPad * pad, GstEvent * event);
92 static const GstQueryType *gst_mpeg2dec_get_src_query_types (GstPad * pad);
94 static gboolean gst_mpeg2dec_src_query (GstPad * pad, GstQuery * query);
96 static gboolean gst_mpeg2dec_sink_convert (GstPad * pad, GstFormat src_format,
97 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
98 static gboolean gst_mpeg2dec_src_convert (GstPad * pad, GstFormat src_format,
99 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
101 static GstStateChangeReturn gst_mpeg2dec_change_state (GstElement * element,
102 GstStateChange transition);
104 static gboolean gst_mpeg2dec_sink_event (GstPad * pad, GstEvent * event);
105 static gboolean gst_mpeg2dec_setcaps (GstPad * pad, GstCaps * caps);
106 static GstFlowReturn gst_mpeg2dec_chain (GstPad * pad, GstBuffer * buf);
108 static void clear_buffers (GstMpeg2dec * mpeg2dec);
110 //static gboolean gst_mpeg2dec_sink_query (GstPad * pad, GstQuery * query);
112 #if 0
113 static const GstFormat *gst_mpeg2dec_get_formats (GstPad * pad);
114 #endif
116 #if 0
117 static const GstEventMask *gst_mpeg2dec_get_event_masks (GstPad * pad);
118 #endif
120 static GstElementClass *parent_class = NULL;
122 static gboolean gst_mpeg2dec_crop_buffer (GstMpeg2dec * dec, GstBuffer ** buf);
124 /*static guint gst_mpeg2dec_signals[LAST_SIGNAL] = { 0 };*/
126 GType
127 gst_mpeg2dec_get_type (void)
128 {
129 static GType mpeg2dec_type = 0;
131 if (!mpeg2dec_type) {
132 static const GTypeInfo mpeg2dec_info = {
133 sizeof (GstMpeg2decClass),
134 gst_mpeg2dec_base_init,
135 NULL,
136 (GClassInitFunc) gst_mpeg2dec_class_init,
137 NULL,
138 NULL,
139 sizeof (GstMpeg2dec),
140 0,
141 (GInstanceInitFunc) gst_mpeg2dec_init,
142 };
144 mpeg2dec_type =
145 g_type_register_static (GST_TYPE_ELEMENT, "GstMpeg2dec", &mpeg2dec_info,
146 0);
147 }
149 GST_DEBUG_CATEGORY_INIT (mpeg2dec_debug, "mpeg2dec", 0,
150 "MPEG2 decoder element");
152 return mpeg2dec_type;
153 }
155 static void
156 gst_mpeg2dec_base_init (gpointer g_class)
157 {
158 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
160 gst_element_class_add_static_pad_template (element_class,
161 &src_template_factory);
162 gst_element_class_add_static_pad_template (element_class,
163 &sink_template_factory);
164 #ifdef enable_user_data
165 gst_element_class_add_static_pad_template (element_class,
166 &user_data_template_factory);
167 #endif
168 gst_element_class_set_details_simple (element_class,
169 "mpeg1 and mpeg2 video decoder", "Codec/Decoder/Video",
170 "Uses libmpeg2 to decode MPEG video streams",
171 "Wim Taymans <wim.taymans@chello.be>");
172 }
174 static void
175 gst_mpeg2dec_class_init (GstMpeg2decClass * klass)
176 {
177 GObjectClass *gobject_class;
178 GstElementClass *gstelement_class;
180 gobject_class = (GObjectClass *) klass;
181 gstelement_class = (GstElementClass *) klass;
183 parent_class = g_type_class_peek_parent (klass);
185 gobject_class->finalize = gst_mpeg2dec_finalize;
187 gstelement_class->change_state = gst_mpeg2dec_change_state;
188 gstelement_class->set_index = gst_mpeg2dec_set_index;
189 gstelement_class->get_index = gst_mpeg2dec_get_index;
190 }
192 static void
193 gst_mpeg2dec_init (GstMpeg2dec * mpeg2dec)
194 {
195 /* create the sink and src pads */
196 mpeg2dec->sinkpad =
197 gst_pad_new_from_static_template (&sink_template_factory, "sink");
198 gst_pad_set_chain_function (mpeg2dec->sinkpad,
199 GST_DEBUG_FUNCPTR (gst_mpeg2dec_chain));
200 #if 0
201 gst_pad_set_query_function (mpeg2dec->sinkpad,
202 GST_DEBUG_FUNCPTR (gst_mpeg2dec_get_sink_query));
203 #endif
204 gst_pad_set_event_function (mpeg2dec->sinkpad,
205 GST_DEBUG_FUNCPTR (gst_mpeg2dec_sink_event));
206 gst_pad_set_setcaps_function (mpeg2dec->sinkpad,
207 GST_DEBUG_FUNCPTR (gst_mpeg2dec_setcaps));
208 gst_element_add_pad (GST_ELEMENT (mpeg2dec), mpeg2dec->sinkpad);
210 mpeg2dec->srcpad =
211 gst_pad_new_from_static_template (&src_template_factory, "src");
212 gst_pad_set_event_function (mpeg2dec->srcpad,
213 GST_DEBUG_FUNCPTR (gst_mpeg2dec_src_event));
214 gst_pad_set_query_type_function (mpeg2dec->srcpad,
215 GST_DEBUG_FUNCPTR (gst_mpeg2dec_get_src_query_types));
216 gst_pad_set_query_function (mpeg2dec->srcpad,
217 GST_DEBUG_FUNCPTR (gst_mpeg2dec_src_query));
218 gst_pad_use_fixed_caps (mpeg2dec->srcpad);
219 gst_element_add_pad (GST_ELEMENT (mpeg2dec), mpeg2dec->srcpad);
221 #ifdef enable_user_data
222 mpeg2dec->userdatapad =
223 gst_pad_new_from_static_template (&user_data_template_factory,
224 "user_data");
225 gst_element_add_pad (GST_ELEMENT (mpeg2dec), mpeg2dec->userdatapad);
226 #endif
228 mpeg2dec->error_count = 0;
229 mpeg2dec->can_allocate_aligned = TRUE;
231 /* initialize the mpeg2dec acceleration */
232 }
234 static void
235 gst_mpeg2dec_finalize (GObject * object)
236 {
237 GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (object);
239 if (mpeg2dec->index) {
240 gst_object_unref (mpeg2dec->index);
241 mpeg2dec->index = NULL;
242 mpeg2dec->index_id = 0;
243 }
245 if (mpeg2dec->decoder) {
246 GST_DEBUG_OBJECT (mpeg2dec, "closing decoder");
247 mpeg2_close (mpeg2dec->decoder);
248 mpeg2dec->decoder = NULL;
249 }
250 clear_buffers (mpeg2dec);
251 g_free (mpeg2dec->dummybuf[3]);
252 mpeg2dec->dummybuf[3] = NULL;
254 G_OBJECT_CLASS (parent_class)->finalize (object);
255 }
257 static void
258 gst_mpeg2dec_reset (GstMpeg2dec * mpeg2dec)
259 {
260 if (mpeg2dec->index) {
261 gst_object_unref (mpeg2dec->index);
262 mpeg2dec->index = NULL;
263 mpeg2dec->index_id = 0;
264 }
266 /* reset the initial video state */
267 mpeg2dec->format = GST_VIDEO_FORMAT_UNKNOWN;
268 mpeg2dec->width = -1;
269 mpeg2dec->height = -1;
270 gst_segment_init (&mpeg2dec->segment, GST_FORMAT_UNDEFINED);
271 mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
272 mpeg2dec->frame_period = 0;
273 mpeg2dec->need_sequence = TRUE;
274 mpeg2dec->next_time = -1;
275 mpeg2dec->offset = 0;
276 mpeg2dec->error_count = 0;
277 mpeg2dec->can_allocate_aligned = TRUE;
278 mpeg2_reset (mpeg2dec->decoder, 1);
279 }
281 static void
282 gst_mpeg2dec_qos_reset (GstMpeg2dec * mpeg2dec)
283 {
284 GST_OBJECT_LOCK (mpeg2dec);
285 mpeg2dec->proportion = 1.0;
286 mpeg2dec->earliest_time = -1;
287 mpeg2dec->dropped = 0;
288 mpeg2dec->processed = 0;
289 GST_OBJECT_UNLOCK (mpeg2dec);
290 }
292 static void
293 gst_mpeg2dec_set_index (GstElement * element, GstIndex * index)
294 {
295 GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (element);
297 GST_OBJECT_LOCK (mpeg2dec);
298 if (mpeg2dec->index)
299 gst_object_unref (mpeg2dec->index);
300 mpeg2dec->index = NULL;
301 mpeg2dec->index_id = 0;
302 if (index) {
303 mpeg2dec->index = gst_object_ref (index);
304 }
305 GST_OBJECT_UNLOCK (mpeg2dec);
306 /* object lock might be taken again */
307 if (index)
308 gst_index_get_writer_id (index, GST_OBJECT (element), &mpeg2dec->index_id);
309 }
311 static GstIndex *
312 gst_mpeg2dec_get_index (GstElement * element)
313 {
314 GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (element);
316 return (mpeg2dec->index) ? gst_object_ref (mpeg2dec->index) : NULL;
317 }
319 static GstFlowReturn
320 gst_mpeg2dec_crop_buffer (GstMpeg2dec * dec, GstBuffer ** buf)
321 {
322 GstFlowReturn flow_ret;
323 GstBuffer *inbuf = *buf;
324 GstBuffer *outbuf;
325 guint outsize, c;
327 outsize = gst_video_format_get_size (dec->format, dec->width, dec->height);
329 GST_LOG_OBJECT (dec, "Copying input buffer %ux%u (%u) to output buffer "
330 "%ux%u (%u)", dec->decoded_width, dec->decoded_height,
331 GST_BUFFER_SIZE (inbuf), dec->width, dec->height, outsize);
333 flow_ret = gst_pad_alloc_buffer_and_set_caps (dec->srcpad,
334 GST_BUFFER_OFFSET_NONE, outsize, GST_PAD_CAPS (dec->srcpad), &outbuf);
336 if (G_UNLIKELY (flow_ret != GST_FLOW_OK))
337 return flow_ret;
339 for (c = 0; c < 3; c++) {
340 const guint8 *src;
341 guint8 *dest;
342 guint stride_in, stride_out;
343 guint c_height, c_width, line;
345 src =
346 GST_BUFFER_DATA (inbuf) +
347 gst_video_format_get_component_offset (dec->format, c,
348 dec->decoded_width, dec->decoded_height);
349 dest =
350 GST_BUFFER_DATA (outbuf) +
351 gst_video_format_get_component_offset (dec->format, c, dec->width,
352 dec->height);
353 stride_out = gst_video_format_get_row_stride (dec->format, c, dec->width);
354 stride_in =
355 gst_video_format_get_row_stride (dec->format, c, dec->decoded_width);
356 c_height =
357 gst_video_format_get_component_height (dec->format, c, dec->height);
358 c_width = gst_video_format_get_component_width (dec->format, c, dec->width);
360 for (line = 0; line < c_height; line++) {
361 memcpy (dest, src, c_width);
362 dest += stride_out;
363 src += stride_in;
364 }
365 }
367 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (dec->srcpad));
368 gst_buffer_copy_metadata (outbuf, inbuf,
369 GST_BUFFER_COPY_TIMESTAMPS | GST_BUFFER_COPY_FLAGS);
371 gst_buffer_unref (*buf);
372 *buf = outbuf;
374 return GST_FLOW_OK;
375 }
377 static GstFlowReturn
378 gst_mpeg2dec_alloc_sized_buf (GstMpeg2dec * mpeg2dec, guint size,
379 GstBuffer ** obuf)
380 {
381 if (mpeg2dec->can_allocate_aligned
382 && mpeg2dec->decoded_width == mpeg2dec->width
383 && mpeg2dec->decoded_height == mpeg2dec->height) {
384 GstFlowReturn ret;
386 ret = gst_pad_alloc_buffer_and_set_caps (mpeg2dec->srcpad,
387 GST_BUFFER_OFFSET_NONE, size, GST_PAD_CAPS (mpeg2dec->srcpad), obuf);
388 if (ret != GST_FLOW_OK) {
389 return ret;
390 }
392 /* libmpeg2 needs 16 byte aligned buffers... test for this here
393 * and if it fails only a single time create our own buffers from
394 * there on below that are correctly aligned */
395 if (((uintptr_t) GST_BUFFER_DATA (*obuf)) % 16 == 0) {
396 GST_LOG_OBJECT (mpeg2dec, "return 16 byte aligned buffer");
397 return ret;
398 }
400 GST_DEBUG_OBJECT (mpeg2dec,
401 "can't get 16 byte aligned buffers, creating our own ones");
402 gst_buffer_unref (*obuf);
403 mpeg2dec->can_allocate_aligned = FALSE;
404 }
406 /* can't use gst_pad_alloc_buffer() here because the output buffer will
407 * either be cropped later or be bigger than expected (for the alignment),
408 * and basetransform-based elements will complain about the wrong unit size
409 * when not operating in passthrough mode */
410 *obuf = gst_buffer_new_and_alloc (size + 15);
411 GST_BUFFER_DATA (*obuf) = (guint8 *) ALIGN_16 (GST_BUFFER_DATA (*obuf));
412 GST_BUFFER_SIZE (*obuf) = size;
413 gst_buffer_set_caps (*obuf, GST_PAD_CAPS (mpeg2dec->srcpad));
415 return GST_FLOW_OK;
416 }
418 static GstFlowReturn
419 gst_mpeg2dec_alloc_buffer (GstMpeg2dec * mpeg2dec, gint64 offset,
420 GstBuffer ** obuf)
421 {
422 GstBuffer *outbuf = NULL;
423 guint8 *buf[3];
424 GstFlowReturn ret = GST_FLOW_OK;
426 ret = gst_mpeg2dec_alloc_sized_buf (mpeg2dec, mpeg2dec->size, &outbuf);
427 if (ret != GST_FLOW_OK)
428 goto no_buffer;
430 buf[0] = GST_BUFFER_DATA (outbuf);
431 buf[1] = buf[0] + mpeg2dec->u_offs;
432 buf[2] = buf[0] + mpeg2dec->v_offs;
434 GST_DEBUG_OBJECT (mpeg2dec, "set_buf: %p %p %p, outbuf %p",
435 buf[0], buf[1], buf[2], outbuf);
437 mpeg2_set_buf (mpeg2dec->decoder, buf, outbuf);
439 /* we store the original byteoffset of this picture in the stream here
440 * because we need it for indexing */
441 GST_BUFFER_OFFSET (outbuf) = offset;
443 *obuf = outbuf;
444 return ret;
446 /* ERRORS */
447 no_buffer:
448 {
449 if (ret != GST_FLOW_WRONG_STATE && ret != GST_FLOW_UNEXPECTED &&
450 ret != GST_FLOW_NOT_LINKED) {
451 GST_ELEMENT_ERROR (mpeg2dec, RESOURCE, FAILED, (NULL),
452 ("Failed to allocate memory for buffer, reason %s",
453 gst_flow_get_name (ret)));
454 }
455 GST_DEBUG_OBJECT (mpeg2dec, "no output buffer, reason %s",
456 gst_flow_get_name (ret));
457 mpeg2_set_buf (mpeg2dec->decoder, mpeg2dec->dummybuf, NULL);
458 *obuf = NULL;
459 return ret;
460 }
461 }
463 static gboolean
464 gst_mpeg2dec_negotiate_format (GstMpeg2dec * mpeg2dec)
465 {
466 GstCaps *caps;
467 guint32 fourcc;
468 const mpeg2_info_t *info;
469 const mpeg2_sequence_t *sequence;
471 info = mpeg2_info (mpeg2dec->decoder);
472 sequence = info->sequence;
474 if (sequence->width != sequence->chroma_width &&
475 sequence->height != sequence->chroma_height) {
476 mpeg2dec->format = GST_VIDEO_FORMAT_I420;
477 } else if ((sequence->width == sequence->chroma_width &&
478 sequence->height != sequence->chroma_height) ||
479 (sequence->width != sequence->chroma_width &&
480 sequence->height == sequence->chroma_height)) {
481 mpeg2dec->format = GST_VIDEO_FORMAT_Y42B;
482 } else {
483 mpeg2dec->format = GST_VIDEO_FORMAT_Y444;
484 }
486 fourcc = gst_video_format_to_fourcc (mpeg2dec->format);
487 mpeg2dec->size = gst_video_format_get_size (mpeg2dec->format,
488 mpeg2dec->decoded_width, mpeg2dec->decoded_height);
489 mpeg2dec->u_offs = gst_video_format_get_component_offset (mpeg2dec->format, 1,
490 mpeg2dec->decoded_width, mpeg2dec->decoded_height);
491 mpeg2dec->v_offs = gst_video_format_get_component_offset (mpeg2dec->format, 2,
492 mpeg2dec->decoded_width, mpeg2dec->decoded_height);
494 if (mpeg2dec->pixel_width == 0 || mpeg2dec->pixel_height == 0) {
495 GValue par = { 0, };
496 GValue dar = { 0, };
497 GValue dimensions = { 0, };
499 /* assume display aspect ratio (DAR) of 4:3 */
500 g_value_init (&dar, GST_TYPE_FRACTION);
501 gst_value_set_fraction (&dar, 4, 3);
502 g_value_init (&dimensions, GST_TYPE_FRACTION);
503 gst_value_set_fraction (&dimensions, mpeg2dec->height, mpeg2dec->width);
505 g_value_init (&par, GST_TYPE_FRACTION);
506 if (!gst_value_fraction_multiply (&par, &dar, &dimensions)) {
507 gst_value_set_fraction (&dimensions, 1, 1);
508 }
510 mpeg2dec->pixel_width = gst_value_get_fraction_numerator (&par);
511 mpeg2dec->pixel_height = gst_value_get_fraction_denominator (&par);
513 GST_WARNING_OBJECT (mpeg2dec, "Unknown pixel-aspect-ratio, assuming %d:%d",
514 mpeg2dec->pixel_width, mpeg2dec->pixel_height);
516 g_value_unset (&par);
517 g_value_unset (&dar);
518 g_value_unset (&dimensions);
519 }
521 caps = gst_caps_new_simple ("video/x-raw-yuv",
522 "format", GST_TYPE_FOURCC, fourcc,
523 "width", G_TYPE_INT, mpeg2dec->width,
524 "height", G_TYPE_INT, mpeg2dec->height,
525 "pixel-aspect-ratio", GST_TYPE_FRACTION, mpeg2dec->pixel_width,
526 mpeg2dec->pixel_height,
527 "framerate", GST_TYPE_FRACTION, mpeg2dec->fps_n, mpeg2dec->fps_d,
528 "interlaced", G_TYPE_BOOLEAN, mpeg2dec->interlaced, NULL);
530 gst_pad_set_caps (mpeg2dec->srcpad, caps);
531 gst_caps_unref (caps);
533 return TRUE;
534 }
536 static void
537 init_dummybuf (GstMpeg2dec * mpeg2dec)
538 {
539 g_free (mpeg2dec->dummybuf[3]);
541 /* libmpeg2 needs 16 byte aligned buffers... care for this here */
542 mpeg2dec->dummybuf[3] = g_malloc0 (mpeg2dec->size + 15);
543 mpeg2dec->dummybuf[0] = ALIGN_16 (mpeg2dec->dummybuf[3]);
544 mpeg2dec->dummybuf[1] = mpeg2dec->dummybuf[0] + mpeg2dec->u_offs;
545 mpeg2dec->dummybuf[2] = mpeg2dec->dummybuf[0] + mpeg2dec->v_offs;
546 }
548 static GstFlowReturn
549 handle_sequence (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info)
550 {
551 GstFlowReturn ret = GST_FLOW_OK;
553 if (info->sequence->frame_period == 0) {
554 GST_WARNING_OBJECT (mpeg2dec, "Frame period is 0!");
555 ret = GST_FLOW_ERROR;
556 goto done;
557 }
559 mpeg2dec->width = info->sequence->picture_width;
560 mpeg2dec->height = info->sequence->picture_height;
561 mpeg2dec->decoded_width = info->sequence->width;
562 mpeg2dec->decoded_height = info->sequence->height;
563 mpeg2dec->total_frames = 0;
565 /* don't take the sequence PAR if we already have one from the sink caps */
566 if (!mpeg2dec->have_par) {
567 mpeg2dec->pixel_width = info->sequence->pixel_width;
568 mpeg2dec->pixel_height = info->sequence->pixel_height;
569 }
571 /* mpeg2 video can only be from 16x16 to 4096x4096. Everything
572 * else is a corrupted files */
573 if (mpeg2dec->width > 4096 || mpeg2dec->width < 16 ||
574 mpeg2dec->height > 4096 || mpeg2dec->height < 16) {
575 GST_ERROR_OBJECT (mpeg2dec, "Invalid frame dimensions: %d x %d",
576 mpeg2dec->width, mpeg2dec->height);
577 return GST_FLOW_ERROR;
578 }
580 /* set framerate */
581 mpeg2dec->fps_n = 27000000;
582 mpeg2dec->fps_d = info->sequence->frame_period;
583 mpeg2dec->frame_period = info->sequence->frame_period * GST_USECOND / 27;
585 mpeg2dec->interlaced =
586 !(info->sequence->flags & SEQ_FLAG_PROGRESSIVE_SEQUENCE);
588 GST_DEBUG_OBJECT (mpeg2dec,
589 "sequence flags: %d, frame period: %d (%g), frame rate: %d/%d",
590 info->sequence->flags, info->sequence->frame_period,
591 (double) (mpeg2dec->frame_period) / GST_SECOND, mpeg2dec->fps_n,
592 mpeg2dec->fps_d);
593 GST_DEBUG_OBJECT (mpeg2dec, "profile: %02x, colour_primaries: %d",
594 info->sequence->profile_level_id, info->sequence->colour_primaries);
595 GST_DEBUG_OBJECT (mpeg2dec, "transfer chars: %d, matrix coef: %d",
596 info->sequence->transfer_characteristics,
597 info->sequence->matrix_coefficients);
598 GST_DEBUG_OBJECT (mpeg2dec,
599 "FLAGS: CONSTRAINED_PARAMETERS:%d, PROGRESSIVE_SEQUENCE:%d",
600 info->sequence->flags & SEQ_FLAG_CONSTRAINED_PARAMETERS,
601 info->sequence->flags & SEQ_FLAG_PROGRESSIVE_SEQUENCE);
602 GST_DEBUG_OBJECT (mpeg2dec, "FLAGS: LOW_DELAY:%d, COLOUR_DESCRIPTION:%d",
603 info->sequence->flags & SEQ_FLAG_LOW_DELAY,
604 info->sequence->flags & SEQ_FLAG_COLOUR_DESCRIPTION);
606 if (!gst_mpeg2dec_negotiate_format (mpeg2dec))
607 goto negotiate_failed;
609 mpeg2_custom_fbuf (mpeg2dec->decoder, 1);
611 init_dummybuf (mpeg2dec);
613 /* Pump in some null buffers, because otherwise libmpeg2 doesn't
614 * initialise the discard_fbuf->id */
615 mpeg2_set_buf (mpeg2dec->decoder, mpeg2dec->dummybuf, NULL);
616 mpeg2_set_buf (mpeg2dec->decoder, mpeg2dec->dummybuf, NULL);
617 mpeg2_set_buf (mpeg2dec->decoder, mpeg2dec->dummybuf, NULL);
619 mpeg2dec->need_sequence = FALSE;
621 done:
622 return ret;
624 negotiate_failed:
625 {
626 GST_ELEMENT_ERROR (mpeg2dec, CORE, NEGOTIATION, (NULL), (NULL));
627 ret = GST_FLOW_NOT_NEGOTIATED;
628 goto done;
629 }
630 }
632 static void
633 clear_buffers (GstMpeg2dec * mpeg2dec)
634 {
635 gint i;
636 GstBuffer **bufpen;
638 for (i = 0; i < 4; i++) {
639 bufpen = &mpeg2dec->ip_buffers[i];
640 if (*bufpen)
641 gst_buffer_unref (*bufpen);
642 *bufpen = NULL;
643 }
644 bufpen = &mpeg2dec->b_buffer;
645 if (*bufpen)
646 gst_buffer_unref (*bufpen);
647 *bufpen = NULL;
648 }
650 static void
651 clear_queued (GstMpeg2dec * mpeg2dec)
652 {
653 g_list_foreach (mpeg2dec->queued, (GFunc) gst_mini_object_unref, NULL);
654 g_list_free (mpeg2dec->queued);
655 mpeg2dec->queued = NULL;
656 }
658 static GstFlowReturn
659 flush_queued (GstMpeg2dec * mpeg2dec)
660 {
661 GstFlowReturn res = GST_FLOW_OK;
663 while (mpeg2dec->queued) {
664 GstBuffer *buf = GST_BUFFER_CAST (mpeg2dec->queued->data);
666 GST_LOG_OBJECT (mpeg2dec, "pushing buffer %p, timestamp %"
667 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT, buf,
668 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
669 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
671 /* iterate ouput queue an push downstream */
672 res = gst_pad_push (mpeg2dec->srcpad, buf);
674 mpeg2dec->queued = g_list_delete_link (mpeg2dec->queued, mpeg2dec->queued);
675 }
676 return res;
677 }
679 static GstFlowReturn
680 handle_picture (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info)
681 {
682 gboolean key_frame = FALSE;
683 GstBuffer *outbuf, **bufpen;
684 GstFlowReturn ret;
685 gint type;
687 ret = gst_mpeg2dec_alloc_buffer (mpeg2dec, mpeg2dec->offset, &outbuf);
688 if (ret != GST_FLOW_OK)
689 goto no_buffer;
691 if (info->current_picture) {
692 type = info->current_picture->flags & PIC_MASK_CODING_TYPE;
693 } else {
694 type = 0;
695 }
697 GST_DEBUG_OBJECT (mpeg2dec, "handle picture type %d", type);
699 key_frame = type == PIC_FLAG_CODING_TYPE_I;
701 switch (type) {
702 case PIC_FLAG_CODING_TYPE_I:
703 mpeg2_skip (mpeg2dec->decoder, 0);
704 if (mpeg2dec->segment.rate < 0.0) {
705 /* negative rate, flush the queued pictures in reverse */
706 GST_DEBUG_OBJECT (mpeg2dec, "flushing queued buffers");
707 flush_queued (mpeg2dec);
708 }
709 case PIC_FLAG_CODING_TYPE_P:
710 bufpen = &mpeg2dec->ip_buffers[mpeg2dec->ip_bufpos];
711 GST_DEBUG_OBJECT (mpeg2dec, "I/P unref %p, ref %p", *bufpen, outbuf);
712 if (*bufpen)
713 gst_buffer_unref (*bufpen);
714 *bufpen = outbuf;
715 mpeg2dec->ip_bufpos = (mpeg2dec->ip_bufpos + 1) & 3;
716 break;
717 case PIC_FLAG_CODING_TYPE_B:
718 bufpen = &mpeg2dec->b_buffer;
719 GST_DEBUG_OBJECT (mpeg2dec, "B unref %p, ref %p", *bufpen, outbuf);
720 if (*bufpen)
721 gst_buffer_unref (*bufpen);
722 *bufpen = outbuf;
723 break;
724 default:
725 break;
726 }
728 GST_DEBUG_OBJECT (mpeg2dec, "picture %s, outbuf %p, offset %"
729 G_GINT64_FORMAT,
730 key_frame ? ", kf," : " ", outbuf, GST_BUFFER_OFFSET (outbuf)
731 );
733 if (mpeg2dec->discont_state == MPEG2DEC_DISC_NEW_PICTURE && key_frame) {
734 mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_KEYFRAME;
735 }
737 return ret;
739 no_buffer:
740 {
741 return ret;
742 }
743 }
745 /* try to clip the buffer to the segment boundaries */
746 static gboolean
747 clip_buffer (GstMpeg2dec * dec, GstBuffer * buf)
748 {
749 gboolean res = TRUE;
750 GstClockTime in_ts, in_dur, stop;
751 gint64 cstart, cstop;
753 in_ts = GST_BUFFER_TIMESTAMP (buf);
754 in_dur = GST_BUFFER_DURATION (buf);
756 GST_LOG_OBJECT (dec,
757 "timestamp:%" GST_TIME_FORMAT " , duration:%" GST_TIME_FORMAT,
758 GST_TIME_ARGS (in_ts), GST_TIME_ARGS (in_dur));
760 /* can't clip without TIME segment */
761 if (dec->segment.format != GST_FORMAT_TIME)
762 goto beach;
764 /* we need a start time */
765 if (!GST_CLOCK_TIME_IS_VALID (in_ts))
766 goto beach;
768 /* generate valid stop, if duration unknown, we have unknown stop */
769 stop =
770 GST_CLOCK_TIME_IS_VALID (in_dur) ? (in_ts + in_dur) : GST_CLOCK_TIME_NONE;
772 /* now clip */
773 if (!(res = gst_segment_clip (&dec->segment, GST_FORMAT_TIME,
774 in_ts, stop, &cstart, &cstop)))
775 goto beach;
777 /* update timestamp and possibly duration if the clipped stop time is
778 * valid */
779 GST_BUFFER_TIMESTAMP (buf) = cstart;
780 if (GST_CLOCK_TIME_IS_VALID (cstop))
781 GST_BUFFER_DURATION (buf) = cstop - cstart;
783 beach:
784 GST_LOG_OBJECT (dec, "%sdropping", (res ? "not " : ""));
785 return res;
786 }
788 static GstFlowReturn
789 handle_slice (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info)
790 {
791 GstBuffer *outbuf = NULL;
792 GstFlowReturn ret = GST_FLOW_OK;
793 const mpeg2_picture_t *picture;
794 gboolean key_frame = FALSE;
795 GstClockTime time;
797 GST_DEBUG_OBJECT (mpeg2dec, "picture slice/end %p %p %p %p",
798 info->display_fbuf,
799 info->display_picture, info->current_picture,
800 (info->display_fbuf ? info->display_fbuf->id : NULL));
802 if (!info->display_fbuf || !info->display_fbuf->id)
803 goto no_display;
805 outbuf = GST_BUFFER (info->display_fbuf->id);
807 picture = info->display_picture;
809 key_frame = (picture->flags & PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_I;
811 GST_DEBUG_OBJECT (mpeg2dec, "picture flags: %d, type: %d, keyframe: %d",
812 picture->flags, picture->flags & PIC_MASK_CODING_TYPE, key_frame);
814 if (key_frame) {
815 GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
816 mpeg2_skip (mpeg2dec->decoder, 0);
817 } else {
818 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
819 }
821 if (mpeg2dec->discont_state == MPEG2DEC_DISC_NEW_KEYFRAME && key_frame)
822 mpeg2dec->discont_state = MPEG2DEC_DISC_NONE;
824 time = GST_CLOCK_TIME_NONE;
826 #if MPEG2_RELEASE < MPEG2_VERSION(0,4,0)
827 if (picture->flags & PIC_FLAG_PTS) {
828 time = MPEG_TIME_TO_GST_TIME (picture->pts);
829 GST_DEBUG_OBJECT (mpeg2dec, "picture pts %" G_GUINT64_FORMAT
830 ", time %" GST_TIME_FORMAT, picture->pts, GST_TIME_ARGS (time));
831 }
832 #else
833 if (picture->flags & PIC_FLAG_TAGS) {
834 guint64 pts = (((guint64) picture->tag2) << 32) | picture->tag;
836 time = MPEG_TIME_TO_GST_TIME (pts);
837 GST_DEBUG_OBJECT (mpeg2dec, "picture tags %" G_GUINT64_FORMAT
838 ", time %" GST_TIME_FORMAT, pts, GST_TIME_ARGS (time));
839 }
840 #endif
842 if (time == GST_CLOCK_TIME_NONE) {
843 time = mpeg2dec->next_time;
844 GST_DEBUG_OBJECT (mpeg2dec, "picture didn't have pts");
845 } else {
846 GST_DEBUG_OBJECT (mpeg2dec,
847 "picture had pts %" GST_TIME_FORMAT ", we had %"
848 GST_TIME_FORMAT, GST_TIME_ARGS (time),
849 GST_TIME_ARGS (mpeg2dec->next_time));
850 mpeg2dec->next_time = time;
851 }
852 GST_BUFFER_TIMESTAMP (outbuf) = time;
854 /* TODO set correct offset here based on frame number */
855 if (info->display_picture_2nd) {
856 GST_BUFFER_DURATION (outbuf) = (picture->nb_fields +
857 info->display_picture_2nd->nb_fields) * mpeg2dec->frame_period / 2;
858 } else {
859 GST_BUFFER_DURATION (outbuf) =
860 picture->nb_fields * mpeg2dec->frame_period / 2;
861 }
862 mpeg2dec->next_time += GST_BUFFER_DURATION (outbuf);
864 if (picture->flags & PIC_FLAG_TOP_FIELD_FIRST)
865 GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_TFF);
867 #if MPEG2_RELEASE >= MPEG2_VERSION(0,5,0)
868 /* repeat field introduced in 0.5.0 */
869 if (picture->flags & PIC_FLAG_REPEAT_FIRST_FIELD)
870 GST_BUFFER_FLAG_SET (outbuf, GST_VIDEO_BUFFER_RFF);
871 #endif
873 GST_DEBUG_OBJECT (mpeg2dec,
874 "picture: %s %s %s %s %s fields:%d off:%" G_GINT64_FORMAT " ts:%"
875 GST_TIME_FORMAT,
876 (picture->flags & PIC_FLAG_PROGRESSIVE_FRAME ? "prog" : " "),
877 (picture->flags & PIC_FLAG_TOP_FIELD_FIRST ? "tff" : " "),
878 #if MPEG2_RELEASE >= MPEG2_VERSION(0,5,0)
879 (picture->flags & PIC_FLAG_REPEAT_FIRST_FIELD ? "rff" : " "),
880 #else
881 "unknown rff",
882 #endif
883 (picture->flags & PIC_FLAG_SKIP ? "skip" : " "),
884 (picture->flags & PIC_FLAG_COMPOSITE_DISPLAY ? "composite" : " "),
885 picture->nb_fields, GST_BUFFER_OFFSET (outbuf),
886 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)));
888 if (mpeg2dec->index) {
889 gst_index_add_association (mpeg2dec->index, mpeg2dec->index_id,
890 (key_frame ? GST_ASSOCIATION_FLAG_KEY_UNIT :
891 GST_ASSOCIATION_FLAG_DELTA_UNIT),
892 GST_FORMAT_BYTES, GST_BUFFER_OFFSET (outbuf),
893 GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (outbuf), 0);
894 }
896 if (picture->flags & PIC_FLAG_SKIP)
897 goto skip;
899 if (mpeg2dec->discont_state != MPEG2DEC_DISC_NONE)
900 goto drop;
902 /* check for clipping */
903 if (!clip_buffer (mpeg2dec, outbuf))
904 goto clipped;
906 if (GST_CLOCK_TIME_IS_VALID (time)) {
907 gboolean need_skip;
908 GstClockTime qostime;
910 /* qos needs to be done on running time */
911 qostime = gst_segment_to_running_time (&mpeg2dec->segment, GST_FORMAT_TIME,
912 time);
914 GST_OBJECT_LOCK (mpeg2dec);
915 /* check for QoS, don't perform the last steps of getting and
916 * pushing the buffers that are known to be late. */
917 /* FIXME, we can also entirely skip decoding if the next valid buffer is
918 * known to be after a keyframe (using the granule_shift) */
919 need_skip = mpeg2dec->earliest_time != -1
920 && qostime <= mpeg2dec->earliest_time;
921 GST_OBJECT_UNLOCK (mpeg2dec);
923 if (need_skip) {
924 GstMessage *qos_msg;
925 guint64 stream_time;
926 gint64 jitter;
928 mpeg2dec->dropped++;
930 stream_time =
931 gst_segment_to_stream_time (&mpeg2dec->segment, GST_FORMAT_TIME,
932 time);
933 jitter = GST_CLOCK_DIFF (qostime, mpeg2dec->earliest_time);
935 qos_msg =
936 gst_message_new_qos (GST_OBJECT_CAST (mpeg2dec), FALSE, qostime,
937 stream_time, time, GST_BUFFER_DURATION (outbuf));
938 gst_message_set_qos_values (qos_msg, jitter, mpeg2dec->proportion,
939 1000000);
940 gst_message_set_qos_stats (qos_msg, GST_FORMAT_BUFFERS,
941 mpeg2dec->processed, mpeg2dec->dropped);
942 gst_element_post_message (GST_ELEMENT_CAST (mpeg2dec), qos_msg);
944 goto dropping_qos;
945 }
946 }
948 mpeg2dec->processed++;
950 /* ref before pushing it out, so we still have the ref in our
951 * array of buffers */
952 gst_buffer_ref (outbuf);
954 /* do cropping if the target region is smaller than the input one */
955 if (mpeg2dec->decoded_width != mpeg2dec->width ||
956 mpeg2dec->decoded_height != mpeg2dec->height) {
957 GST_DEBUG_OBJECT (mpeg2dec, "cropping buffer");
958 ret = gst_mpeg2dec_crop_buffer (mpeg2dec, &outbuf);
959 if (ret != GST_FLOW_OK)
960 goto done;
961 }
963 if (mpeg2dec->segment.rate >= 0.0) {
964 /* forward: push right away */
965 GST_LOG_OBJECT (mpeg2dec, "pushing buffer %p, timestamp %"
966 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
967 outbuf,
968 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
969 GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
970 GST_LOG_OBJECT (mpeg2dec, "... with flags %x", GST_BUFFER_FLAGS (outbuf));
972 ret = gst_pad_push (mpeg2dec->srcpad, outbuf);
973 GST_DEBUG_OBJECT (mpeg2dec, "pushed with result %s",
974 gst_flow_get_name (ret));
975 } else {
976 /* reverse: queue, we'll push in reverse when we receive the next (previous)
977 * keyframe. */
978 GST_DEBUG_OBJECT (mpeg2dec, "queued frame");
979 mpeg2dec->queued = g_list_prepend (mpeg2dec->queued, outbuf);
980 ret = GST_FLOW_OK;
981 }
983 done:
985 return ret;
987 /* special cases */
988 no_display:
989 {
990 GST_DEBUG_OBJECT (mpeg2dec, "no picture to display");
991 return GST_FLOW_OK;
992 }
993 skip:
994 {
995 GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer because of skip flag");
996 return GST_FLOW_OK;
997 }
998 drop:
999 {
1000 GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer, discont state %d",
1001 mpeg2dec->discont_state);
1002 return GST_FLOW_OK;
1003 }
1004 clipped:
1005 {
1006 GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer, clipped");
1007 return GST_FLOW_OK;
1008 }
1009 dropping_qos:
1010 {
1011 GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer because of QoS");
1012 return GST_FLOW_OK;
1013 }
1014 }
1016 #if 0
1017 static void
1018 update_streaminfo (GstMpeg2dec * mpeg2dec)
1019 {
1020 GstCaps *caps;
1021 GstProps *props;
1022 GstPropsEntry *entry;
1023 const mpeg2_info_t *info;
1025 info = mpeg2_info (mpeg2dec->decoder);
1027 props = gst_props_empty_new ();
1029 entry =
1030 gst_props_entry_new ("framerate",
1031 G_TYPE_DOUBLE (GST_SECOND / (float) mpeg2dec->frame_period));
1032 gst_props_add_entry (props, entry);
1033 entry =
1034 gst_props_entry_new ("bitrate",
1035 G_TYPE_INT (info->sequence->byte_rate * 8));
1036 gst_props_add_entry (props, entry);
1038 caps = gst_caps_new ("mpeg2dec_streaminfo",
1039 "application/x-gst-streaminfo", props);
1041 gst_caps_replace_sink (&mpeg2dec->streaminfo, caps);
1042 g_object_notify (G_OBJECT (mpeg2dec), "streaminfo");
1043 }
1044 #endif
1046 static GstFlowReturn
1047 gst_mpeg2dec_chain (GstPad * pad, GstBuffer * buf)
1048 {
1049 GstMpeg2dec *mpeg2dec;
1050 guint32 size;
1051 guint8 *data, *end;
1052 GstClockTime pts;
1053 const mpeg2_info_t *info;
1054 mpeg2_state_t state;
1055 gboolean done = FALSE;
1056 GstFlowReturn ret = GST_FLOW_OK;
1058 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1060 size = GST_BUFFER_SIZE (buf);
1061 data = GST_BUFFER_DATA (buf);
1062 pts = GST_BUFFER_TIMESTAMP (buf);
1064 if (GST_BUFFER_IS_DISCONT (buf)) {
1065 GST_LOG_OBJECT (mpeg2dec, "DISCONT, reset decoder");
1066 /* when we receive a discont, reset our state as to not create too much
1067 * distortion in the picture due to missing packets */
1068 mpeg2_reset (mpeg2dec->decoder, 0);
1069 mpeg2_skip (mpeg2dec->decoder, 1);
1070 mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
1071 }
1073 GST_LOG_OBJECT (mpeg2dec, "received buffer, timestamp %"
1074 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
1075 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
1076 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
1078 info = mpeg2dec->info;
1079 end = data + size;
1081 mpeg2dec->offset = GST_BUFFER_OFFSET (buf);
1083 if (pts != GST_CLOCK_TIME_NONE) {
1084 gint64 mpeg_pts = GST_TIME_TO_MPEG_TIME (pts);
1086 GST_DEBUG_OBJECT (mpeg2dec,
1087 "have pts: %" G_GINT64_FORMAT " (%" GST_TIME_FORMAT ")",
1088 mpeg_pts, GST_TIME_ARGS (MPEG_TIME_TO_GST_TIME (mpeg_pts)));
1090 #if MPEG2_RELEASE >= MPEG2_VERSION(0,4,0)
1091 mpeg2_tag_picture (mpeg2dec->decoder, mpeg_pts & 0xffffffff,
1092 mpeg_pts >> 32);
1093 #else
1094 mpeg2_pts (mpeg2dec->decoder, mpeg_pts);
1095 #endif
1096 } else {
1097 GST_LOG ("no pts");
1098 }
1100 GST_LOG_OBJECT (mpeg2dec, "calling mpeg2_buffer");
1101 mpeg2_buffer (mpeg2dec->decoder, data, end);
1102 GST_LOG_OBJECT (mpeg2dec, "calling mpeg2_buffer done");
1104 while (!done) {
1105 GST_LOG_OBJECT (mpeg2dec, "calling parse");
1106 state = mpeg2_parse (mpeg2dec->decoder);
1107 GST_DEBUG_OBJECT (mpeg2dec, "parse state %d", state);
1109 switch (state) {
1110 #if MPEG2_RELEASE >= MPEG2_VERSION (0, 5, 0)
1111 case STATE_SEQUENCE_MODIFIED:
1112 GST_DEBUG_OBJECT (mpeg2dec, "sequence modified");
1113 /* fall through */
1114 #endif
1115 case STATE_SEQUENCE:
1116 ret = handle_sequence (mpeg2dec, info);
1117 /* if there is an error handling the sequence
1118 * reset the decoder, maybe something more elegant
1119 * could be done.
1120 */
1121 if (ret == GST_FLOW_ERROR) {
1122 mpeg2dec->error_count++;
1123 GST_WARNING_OBJECT (mpeg2dec, "Decoding error #%d",
1124 mpeg2dec->error_count);
1125 if (mpeg2dec->error_count >= WARN_THRESHOLD && WARN_THRESHOLD > 0) {
1126 GST_ELEMENT_WARNING (mpeg2dec, STREAM, DECODE,
1127 ("%d consecutive decoding errors", mpeg2dec->error_count),
1128 (NULL));
1129 }
1130 mpeg2_reset (mpeg2dec->decoder, 0);
1131 mpeg2_skip (mpeg2dec->decoder, 1);
1132 mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
1134 goto exit;
1135 }
1136 break;
1137 case STATE_SEQUENCE_REPEATED:
1138 GST_DEBUG_OBJECT (mpeg2dec, "sequence repeated");
1139 break;
1140 case STATE_GOP:
1141 GST_DEBUG_OBJECT (mpeg2dec, "gop");
1142 break;
1143 case STATE_PICTURE:
1144 ret = handle_picture (mpeg2dec, info);
1145 break;
1146 case STATE_SLICE_1ST:
1147 GST_LOG_OBJECT (mpeg2dec, "1st slice of frame encountered");
1148 break;
1149 case STATE_PICTURE_2ND:
1150 GST_LOG_OBJECT (mpeg2dec,
1151 "Second picture header encountered. Decoding 2nd field");
1152 break;
1153 #if MPEG2_RELEASE >= MPEG2_VERSION (0, 4, 0)
1154 case STATE_INVALID_END:
1155 GST_DEBUG_OBJECT (mpeg2dec, "invalid end");
1156 #endif
1157 case STATE_END:
1158 GST_DEBUG_OBJECT (mpeg2dec, "end");
1159 mpeg2dec->need_sequence = TRUE;
1160 case STATE_SLICE:
1161 ret = handle_slice (mpeg2dec, info);
1162 break;
1163 case STATE_BUFFER:
1164 done = TRUE;
1165 break;
1166 /* error */
1167 case STATE_INVALID:
1168 /* FIXME: at some point we should probably send newsegment events to
1169 * let downstream know that parts of the stream are missing */
1170 mpeg2dec->error_count++;
1171 GST_WARNING_OBJECT (mpeg2dec, "Decoding error #%d",
1172 mpeg2dec->error_count);
1173 if (mpeg2dec->error_count >= WARN_THRESHOLD && WARN_THRESHOLD > 0) {
1174 GST_ELEMENT_WARNING (mpeg2dec, STREAM, DECODE,
1175 ("%d consecutive decoding errors", mpeg2dec->error_count),
1176 (NULL));
1177 }
1178 continue;
1179 default:
1180 GST_ERROR_OBJECT (mpeg2dec, "Unknown libmpeg2 state %d, FIXME", state);
1181 goto exit;
1182 }
1184 mpeg2dec->error_count = 0;
1186 /*
1187 * FIXME: should pass more information such as state the user data is from
1188 */
1189 #ifdef enable_user_data
1190 if (info->user_data_len > 0) {
1191 GstBuffer *udbuf = gst_buffer_new_and_alloc (info->user_data_len);
1193 memcpy (GST_BUFFER_DATA (udbuf), info->user_data, info->user_data_len);
1195 gst_pad_push (mpeg2dec->userdatapad, udbuf);
1196 }
1197 #endif
1199 if (ret != GST_FLOW_OK) {
1200 GST_DEBUG_OBJECT (mpeg2dec, "exit loop, reason %s",
1201 gst_flow_get_name (ret));
1202 break;
1203 }
1204 }
1205 done:
1206 gst_buffer_unref (buf);
1207 return ret;
1209 /* errors */
1210 exit:
1211 {
1212 ret = GST_FLOW_OK;
1213 goto done;
1214 }
1215 }
1217 static gboolean
1218 gst_mpeg2dec_sink_event (GstPad * pad, GstEvent * event)
1219 {
1220 GstMpeg2dec *mpeg2dec;
1221 gboolean ret = TRUE;
1223 mpeg2dec = GST_MPEG2DEC (gst_pad_get_parent (pad));
1225 GST_DEBUG_OBJECT (mpeg2dec, "Got %s event on sink pad",
1226 GST_EVENT_TYPE_NAME (event));
1228 switch (GST_EVENT_TYPE (event)) {
1229 case GST_EVENT_NEWSEGMENT:
1230 {
1231 gboolean update;
1232 GstFormat format;
1233 gdouble rate, arate;
1234 gint64 start, stop, time;
1236 gst_event_parse_new_segment_full (event, &update, &rate, &arate, &format,
1237 &start, &stop, &time);
1239 /* we need TIME and a positive rate */
1240 if (format != GST_FORMAT_TIME)
1241 goto newseg_wrong_format;
1243 /* now configure the values */
1244 gst_segment_set_newsegment_full (&mpeg2dec->segment, update,
1245 rate, arate, format, start, stop, time);
1247 GST_DEBUG_OBJECT (mpeg2dec,
1248 "Pushing newseg rate %g, applied rate %g, format %d, start %"
1249 G_GINT64_FORMAT ", stop %" G_GINT64_FORMAT ", pos %" G_GINT64_FORMAT,
1250 rate, arate, format, start, stop, time);
1252 ret = gst_pad_push_event (mpeg2dec->srcpad, event);
1253 break;
1254 }
1255 case GST_EVENT_FLUSH_START:
1256 ret = gst_pad_push_event (mpeg2dec->srcpad, event);
1257 break;
1258 case GST_EVENT_FLUSH_STOP:
1259 {
1260 mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
1261 mpeg2dec->next_time = -1;;
1262 gst_mpeg2dec_qos_reset (mpeg2dec);
1263 mpeg2_reset (mpeg2dec->decoder, 0);
1264 mpeg2_skip (mpeg2dec->decoder, 1);
1265 clear_queued (mpeg2dec);
1266 ret = gst_pad_push_event (mpeg2dec->srcpad, event);
1267 break;
1268 }
1269 case GST_EVENT_EOS:
1270 if (mpeg2dec->index && mpeg2dec->closed) {
1271 gst_index_commit (mpeg2dec->index, mpeg2dec->index_id);
1272 }
1273 ret = gst_pad_push_event (mpeg2dec->srcpad, event);
1274 break;
1275 default:
1276 ret = gst_pad_push_event (mpeg2dec->srcpad, event);
1277 break;
1278 }
1280 done:
1281 gst_object_unref (mpeg2dec);
1283 return ret;
1285 /* ERRORS */
1286 newseg_wrong_format:
1287 {
1288 GST_DEBUG_OBJECT (mpeg2dec, "received non TIME newsegment");
1289 gst_event_unref (event);
1290 goto done;
1291 }
1292 }
1294 static gboolean
1295 gst_mpeg2dec_setcaps (GstPad * pad, GstCaps * caps)
1296 {
1297 GstMpeg2dec *mpeg2dec;
1298 GstStructure *s;
1300 mpeg2dec = GST_MPEG2DEC (gst_pad_get_parent (pad));
1302 s = gst_caps_get_structure (caps, 0);
1304 /* parse the par, this overrides the encoded par */
1305 mpeg2dec->have_par = gst_structure_get_fraction (s, "pixel-aspect-ratio",
1306 &mpeg2dec->pixel_width, &mpeg2dec->pixel_height);
1308 gst_object_unref (mpeg2dec);
1310 return TRUE;
1311 }
1313 static gboolean
1314 gst_mpeg2dec_sink_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
1315 GstFormat * dest_format, gint64 * dest_value)
1316 {
1317 gboolean res = TRUE;
1318 GstMpeg2dec *mpeg2dec;
1319 const mpeg2_info_t *info;
1321 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1323 if (mpeg2dec->decoder == NULL)
1324 return FALSE;
1326 if (src_format == *dest_format) {
1327 *dest_value = src_value;
1328 return TRUE;
1329 }
1331 info = mpeg2_info (mpeg2dec->decoder);
1333 switch (src_format) {
1334 case GST_FORMAT_BYTES:
1335 switch (*dest_format) {
1336 case GST_FORMAT_TIME:
1337 if (info->sequence && info->sequence->byte_rate) {
1338 *dest_value =
1339 gst_util_uint64_scale (GST_SECOND, src_value,
1340 info->sequence->byte_rate);
1341 GST_WARNING_OBJECT (mpeg2dec, "dest_value:%" GST_TIME_FORMAT,
1342 GST_TIME_ARGS (*dest_value));
1343 break;
1344 } else if (info->sequence)
1345 GST_WARNING_OBJECT (mpeg2dec,
1346 "Cannot convert from BYTES to TIME since we don't know the bitrate at this point.");
1347 default:
1348 res = FALSE;
1349 }
1350 break;
1351 case GST_FORMAT_TIME:
1352 switch (*dest_format) {
1353 case GST_FORMAT_BYTES:
1354 if (info->sequence && info->sequence->byte_rate) {
1355 *dest_value =
1356 gst_util_uint64_scale_int (src_value, info->sequence->byte_rate,
1357 GST_SECOND);
1358 break;
1359 } else if (info->sequence)
1360 GST_WARNING_OBJECT (mpeg2dec,
1361 "Cannot convert from TIME to BYTES since we don't know the bitrate at this point.");
1362 default:
1363 res = FALSE;
1364 }
1365 break;
1366 default:
1367 res = FALSE;
1368 }
1369 return res;
1370 }
1373 static gboolean
1374 gst_mpeg2dec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
1375 GstFormat * dest_format, gint64 * dest_value)
1376 {
1377 gboolean res = TRUE;
1378 GstMpeg2dec *mpeg2dec;
1379 const mpeg2_info_t *info;
1380 guint64 scale = 1;
1382 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1384 if (mpeg2dec->decoder == NULL)
1385 return FALSE;
1387 if (src_format == *dest_format) {
1388 *dest_value = src_value;
1389 return TRUE;
1390 }
1392 info = mpeg2_info (mpeg2dec->decoder);
1394 switch (src_format) {
1395 case GST_FORMAT_BYTES:
1396 switch (*dest_format) {
1397 case GST_FORMAT_TIME:
1398 default:
1399 res = FALSE;
1400 }
1401 break;
1402 case GST_FORMAT_TIME:
1403 switch (*dest_format) {
1404 case GST_FORMAT_BYTES:
1405 scale = 6 * (mpeg2dec->width * mpeg2dec->height >> 2);
1406 case GST_FORMAT_DEFAULT:
1407 if (info->sequence && mpeg2dec->frame_period) {
1408 *dest_value =
1409 gst_util_uint64_scale_int (src_value, scale,
1410 mpeg2dec->frame_period);
1411 break;
1412 }
1413 default:
1414 res = FALSE;
1415 }
1416 break;
1417 case GST_FORMAT_DEFAULT:
1418 switch (*dest_format) {
1419 case GST_FORMAT_TIME:
1420 *dest_value = src_value * mpeg2dec->frame_period;
1421 break;
1422 case GST_FORMAT_BYTES:
1423 *dest_value =
1424 src_value * 6 * ((mpeg2dec->width * mpeg2dec->height) >> 2);
1425 break;
1426 default:
1427 res = FALSE;
1428 }
1429 break;
1430 default:
1431 res = FALSE;
1432 }
1433 return res;
1434 }
1436 static const GstQueryType *
1437 gst_mpeg2dec_get_src_query_types (GstPad * pad)
1438 {
1439 static const GstQueryType types[] = {
1440 GST_QUERY_POSITION,
1441 GST_QUERY_DURATION,
1442 0
1443 };
1445 return types;
1446 }
1448 static gboolean
1449 gst_mpeg2dec_src_query (GstPad * pad, GstQuery * query)
1450 {
1451 gboolean res = TRUE;
1452 GstMpeg2dec *mpeg2dec;
1454 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1456 switch (GST_QUERY_TYPE (query)) {
1457 case GST_QUERY_POSITION:
1458 {
1459 GstFormat format;
1460 gint64 cur;
1462 /* First, we try to ask upstream, which might know better, especially in
1463 * the case of DVDs, with multiple chapter */
1464 if ((res = gst_pad_peer_query (mpeg2dec->sinkpad, query)))
1465 break;
1467 /* save requested format */
1468 gst_query_parse_position (query, &format, NULL);
1470 /* and convert to the requested format */
1471 if (!gst_mpeg2dec_src_convert (pad, GST_FORMAT_TIME,
1472 mpeg2dec->next_time, &format, &cur))
1473 goto error;
1475 cur = gst_segment_to_stream_time (&mpeg2dec->segment, format, cur);
1476 if (cur == -1)
1477 goto error;
1479 gst_query_set_position (query, format, cur);
1481 GST_LOG_OBJECT (mpeg2dec,
1482 "position query: we return %" G_GUINT64_FORMAT " (format %u)", cur,
1483 format);
1484 break;
1485 }
1486 case GST_QUERY_DURATION:
1487 {
1488 GstFormat format;
1489 GstFormat rformat;
1490 gint64 total, total_bytes;
1491 GstPad *peer;
1493 if ((peer = gst_pad_get_peer (mpeg2dec->sinkpad)) == NULL)
1494 goto error;
1496 /* save requested format */
1497 gst_query_parse_duration (query, &format, NULL);
1499 /* send to peer */
1500 if ((res = gst_pad_query (peer, query))) {
1501 gst_object_unref (peer);
1502 goto done;
1503 } else {
1504 GST_LOG_OBJECT (mpeg2dec, "query on peer pad failed, trying bytes");
1505 }
1507 /* query peer for total length in bytes */
1508 gst_query_set_duration (query, GST_FORMAT_BYTES, -1);
1510 if (!(res = gst_pad_query (peer, query))) {
1511 GST_LOG_OBJECT (mpeg2dec, "query on peer pad failed");
1512 gst_object_unref (peer);
1513 goto error;
1514 }
1515 gst_object_unref (peer);
1517 /* get the returned format */
1518 gst_query_parse_duration (query, &rformat, &total_bytes);
1519 GST_LOG_OBJECT (mpeg2dec,
1520 "peer pad returned total=%" G_GINT64_FORMAT " bytes", total_bytes);
1522 if (total_bytes != -1) {
1523 if (!gst_mpeg2dec_sink_convert (pad, GST_FORMAT_BYTES, total_bytes,
1524 &format, &total))
1525 goto error;
1526 } else {
1527 total = -1;
1528 }
1530 gst_query_set_duration (query, format, total);
1532 GST_LOG_OBJECT (mpeg2dec,
1533 "position query: we return %" G_GUINT64_FORMAT " (format %u)", total,
1534 format);
1535 break;
1536 }
1537 default:
1538 res = gst_pad_query_default (pad, query);
1539 break;
1540 }
1541 done:
1542 return res;
1544 error:
1546 GST_DEBUG ("error handling query");
1547 return FALSE;
1548 }
1551 #if 0
1552 static const GstEventMask *
1553 gst_mpeg2dec_get_event_masks (GstPad * pad)
1554 {
1555 static const GstEventMask masks[] = {
1556 {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
1557 {GST_EVENT_NAVIGATION, GST_EVENT_FLAG_NONE},
1558 {0,}
1559 };
1561 return masks;
1562 }
1563 #endif
1565 static gboolean
1566 index_seek (GstPad * pad, GstEvent * event)
1567 {
1568 GstIndexEntry *entry;
1569 GstMpeg2dec *mpeg2dec;
1570 gdouble rate;
1571 GstFormat format;
1572 GstSeekFlags flags;
1573 GstSeekType cur_type, stop_type;
1574 gint64 cur, stop;
1576 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1578 gst_event_parse_seek (event, &rate, &format, &flags,
1579 &cur_type, &cur, &stop_type, &stop);
1581 entry = gst_index_get_assoc_entry (mpeg2dec->index, mpeg2dec->index_id,
1582 GST_INDEX_LOOKUP_BEFORE, GST_ASSOCIATION_FLAG_KEY_UNIT, format, cur);
1584 if ((entry) && gst_pad_is_linked (mpeg2dec->sinkpad)) {
1585 const GstFormat *peer_formats, *try_formats;
1587 /* since we know the exact byteoffset of the frame, make sure to seek on bytes first */
1588 const GstFormat try_all_formats[] = {
1589 GST_FORMAT_BYTES,
1590 GST_FORMAT_TIME,
1591 0
1592 };
1594 try_formats = try_all_formats;
1596 #if 0
1597 peer_formats = gst_pad_get_formats (GST_PAD_PEER (mpeg2dec->sinkpad));
1598 #else
1599 peer_formats = try_all_formats; /* FIXE ME */
1600 #endif
1602 while (gst_formats_contains (peer_formats, *try_formats)) {
1603 gint64 value;
1605 if (gst_index_entry_assoc_map (entry, *try_formats, &value)) {
1606 GstEvent *seek_event;
1608 GST_DEBUG_OBJECT (mpeg2dec, "index %s %" G_GINT64_FORMAT
1609 " -> %s %" G_GINT64_FORMAT,
1610 gst_format_get_details (format)->nick,
1611 cur, gst_format_get_details (*try_formats)->nick, value);
1613 /* lookup succeeded, create the seek */
1614 seek_event =
1615 gst_event_new_seek (rate, *try_formats, flags, cur_type, value,
1616 stop_type, stop);
1617 /* do the seek */
1618 if (gst_pad_push_event (mpeg2dec->sinkpad, seek_event)) {
1619 /* seek worked, we're done, loop will exit */
1620 #if 0
1621 mpeg2dec->segment_start = GST_EVENT_SEEK_OFFSET (event);
1622 #endif
1623 return TRUE;
1624 }
1625 }
1626 try_formats++;
1627 }
1628 }
1629 return FALSE;
1630 }
1632 static gboolean
1633 normal_seek (GstPad * pad, GstEvent * event)
1634 {
1635 gdouble rate;
1636 GstFormat format, conv;
1637 GstSeekFlags flags;
1638 GstSeekType cur_type, stop_type;
1639 gint64 cur, stop;
1640 gint64 time_cur, bytes_cur;
1641 gint64 time_stop, bytes_stop;
1642 gboolean res;
1643 GstMpeg2dec *mpeg2dec;
1644 GstEvent *peer_event;
1646 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1648 GST_DEBUG ("normal seek");
1650 gst_event_parse_seek (event, &rate, &format, &flags,
1651 &cur_type, &cur, &stop_type, &stop);
1653 conv = GST_FORMAT_TIME;
1654 if (!gst_mpeg2dec_src_convert (pad, format, cur, &conv, &time_cur))
1655 goto convert_failed;
1656 if (!gst_mpeg2dec_src_convert (pad, format, stop, &conv, &time_stop))
1657 goto convert_failed;
1659 GST_DEBUG ("seek to time %" GST_TIME_FORMAT "-%" GST_TIME_FORMAT,
1660 GST_TIME_ARGS (time_cur), GST_TIME_ARGS (time_stop));
1662 peer_event = gst_event_new_seek (rate, GST_FORMAT_TIME, flags,
1663 cur_type, time_cur, stop_type, time_stop);
1665 /* try seek on time then */
1666 if ((res = gst_pad_push_event (mpeg2dec->sinkpad, peer_event)))
1667 goto done;
1669 /* else we try to seek on bytes */
1670 conv = GST_FORMAT_BYTES;
1671 if (!gst_mpeg2dec_sink_convert (pad, GST_FORMAT_TIME, time_cur,
1672 &conv, &bytes_cur))
1673 goto convert_failed;
1674 if (!gst_mpeg2dec_sink_convert (pad, GST_FORMAT_TIME, time_stop,
1675 &conv, &bytes_stop))
1676 goto convert_failed;
1678 /* conversion succeeded, create the seek */
1679 peer_event =
1680 gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
1681 cur_type, bytes_cur, stop_type, bytes_stop);
1683 /* do the seek */
1684 res = gst_pad_push_event (mpeg2dec->sinkpad, peer_event);
1686 done:
1687 return res;
1689 /* ERRORS */
1690 convert_failed:
1691 {
1692 /* probably unsupported seek format */
1693 GST_DEBUG_OBJECT (mpeg2dec,
1694 "failed to convert format %u into GST_FORMAT_TIME", format);
1695 return FALSE;
1696 }
1697 }
1700 static gboolean
1701 gst_mpeg2dec_src_event (GstPad * pad, GstEvent * event)
1702 {
1703 gboolean res;
1704 GstMpeg2dec *mpeg2dec;
1706 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1708 if (mpeg2dec->decoder == NULL)
1709 goto no_decoder;
1711 switch (GST_EVENT_TYPE (event)) {
1712 /* the all-formats seek logic */
1713 case GST_EVENT_SEEK:{
1714 gst_event_ref (event);
1715 if (!(res = gst_pad_push_event (mpeg2dec->sinkpad, event))) {
1716 if (mpeg2dec->index)
1717 res = index_seek (pad, event);
1718 else
1719 res = normal_seek (pad, event);
1720 }
1721 gst_event_unref (event);
1722 break;
1723 }
1724 case GST_EVENT_QOS:
1725 {
1726 gdouble proportion;
1727 GstClockTimeDiff diff;
1728 GstClockTime timestamp;
1730 gst_event_parse_qos (event, &proportion, &diff, ×tamp);
1732 GST_OBJECT_LOCK (mpeg2dec);
1733 mpeg2dec->proportion = proportion;
1734 mpeg2dec->earliest_time = timestamp + diff;
1735 GST_OBJECT_UNLOCK (mpeg2dec);
1737 GST_DEBUG_OBJECT (mpeg2dec,
1738 "got QoS %" GST_TIME_FORMAT ", %" G_GINT64_FORMAT,
1739 GST_TIME_ARGS (timestamp), diff);
1741 res = gst_pad_push_event (mpeg2dec->sinkpad, event);
1742 break;
1743 }
1744 case GST_EVENT_NAVIGATION:
1745 /* Forward a navigation event unchanged */
1746 default:
1747 res = gst_pad_push_event (mpeg2dec->sinkpad, event);
1748 break;
1749 }
1750 return res;
1752 no_decoder:
1753 {
1754 GST_DEBUG_OBJECT (mpeg2dec, "no decoder, cannot handle event");
1755 gst_event_unref (event);
1756 return FALSE;
1757 }
1758 }
1760 static GstStateChangeReturn
1761 gst_mpeg2dec_change_state (GstElement * element, GstStateChange transition)
1762 {
1763 GstStateChangeReturn ret;
1764 GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (element);
1766 switch (transition) {
1767 case GST_STATE_CHANGE_NULL_TO_READY:
1768 mpeg2_accel (MPEG2_ACCEL_DETECT);
1769 if ((mpeg2dec->decoder = mpeg2_init ()) == NULL)
1770 goto init_failed;
1771 mpeg2dec->info = mpeg2_info (mpeg2dec->decoder);
1772 break;
1773 case GST_STATE_CHANGE_READY_TO_PAUSED:
1774 gst_mpeg2dec_reset (mpeg2dec);
1775 gst_mpeg2dec_qos_reset (mpeg2dec);
1776 break;
1777 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1778 default:
1779 break;
1780 }
1782 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1784 switch (transition) {
1785 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1786 break;
1787 case GST_STATE_CHANGE_PAUSED_TO_READY:
1788 gst_mpeg2dec_qos_reset (mpeg2dec);
1789 clear_queued (mpeg2dec);
1790 break;
1791 case GST_STATE_CHANGE_READY_TO_NULL:
1792 if (mpeg2dec->decoder) {
1793 mpeg2_close (mpeg2dec->decoder);
1794 mpeg2dec->decoder = NULL;
1795 mpeg2dec->info = NULL;
1796 }
1797 clear_buffers (mpeg2dec);
1798 break;
1799 default:
1800 break;
1801 }
1802 return ret;
1804 /* ERRORS */
1805 init_failed:
1806 {
1807 GST_ELEMENT_ERROR (mpeg2dec, LIBRARY, INIT,
1808 (NULL), ("Failed to initialize libmpeg2 library"));
1809 return GST_STATE_CHANGE_FAILURE;
1810 }
1811 }
1813 static gboolean
1814 plugin_init (GstPlugin * plugin)
1815 {
1816 if (!gst_element_register (plugin, "mpeg2dec", GST_RANK_PRIMARY,
1817 GST_TYPE_MPEG2DEC))
1818 return FALSE;
1820 return TRUE;
1821 }
1823 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1824 GST_VERSION_MINOR,
1825 "mpeg2dec",
1826 "LibMpeg2 decoder", plugin_init, VERSION, "GPL", GST_PACKAGE_NAME,
1827 GST_PACKAGE_ORIGIN);