f8133792d6e624e8baa95a5b1bedaa43e3d65d34
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 /* mpeg2dec changed a struct name after 0.3.1, here's a workaround */
30 /* mpeg2dec also only defined MPEG2_RELEASE after 0.3.1
31 #if MPEG2_RELEASE < MPEG2_VERSION(0,3,2)
32 */
33 #ifndef MPEG2_RELEASE
34 #define MPEG2_VERSION(a,b,c) ((((a)&0xff)<<16)|(((b)&0xff)<<8)|((c)&0xff))
35 #define MPEG2_RELEASE MPEG2_VERSION(0,3,1)
36 typedef picture_t mpeg2_picture_t;
37 typedef gint mpeg2_state_t;
39 #define STATE_BUFFER 0
40 #endif
42 GST_DEBUG_CATEGORY_STATIC (mpeg2dec_debug);
43 #define GST_CAT_DEFAULT (mpeg2dec_debug)
45 /* table with framerates expressed as fractions */
46 static gint fpss[][2] = { {24000, 1001},
47 {24, 1}, {25, 1}, {30000, 1001},
48 {30, 1}, {50, 1}, {60000, 1001},
49 {60, 1}, {0, 1}
50 };
52 /* frame periods */
53 static guint frame_periods[] = {
54 1126125, 1125000, 1080000, 900900, 900000, 540000, 450450, 450000, 0
55 };
57 /* elementfactory information */
58 static GstElementDetails gst_mpeg2dec_details = {
59 "mpeg1 and mpeg2 video decoder",
60 "Codec/Decoder/Video",
61 "Uses libmpeg2 to decode MPEG video streams",
62 "Wim Taymans <wim.taymans@chello.be>",
63 };
65 /* Mpeg2dec signals and args */
66 enum
67 {
68 /* FILL ME */
69 LAST_SIGNAL
70 };
72 enum
73 {
74 ARG_0
75 /* FILL ME */
76 };
78 /* error out after receiving MAX_ERROR_COUNT STATE_INVALID return value
79 * from mpeg2_parse. -1 means never error out
80 */
81 #define MAX_ERROR_COUNT (5)
83 /*
84 * We can't use fractions in static pad templates, so
85 * we do something manual...
86 * FIXME: This is no longer true. We could use a normal pad template
87 * now
88 */
89 static GstPadTemplate *
90 src_templ (void)
91 {
92 static GstPadTemplate *templ = NULL;
94 if (!templ) {
95 GstCaps *caps;
96 GstStructure *structure;
97 GValue list = { 0 }
98 , fps = {
99 0}
100 , fmt = {
101 0};
102 char *fmts[] = { "YV12", "I420", "Y42B", NULL };
103 guint n;
105 caps = gst_caps_new_simple ("video/x-raw-yuv",
106 "format", GST_TYPE_FOURCC,
107 GST_MAKE_FOURCC ('I', '4', '2', '0'),
108 "width", GST_TYPE_INT_RANGE, 16, 4096,
109 "height", GST_TYPE_INT_RANGE, 16, 4096, NULL);
111 structure = gst_caps_get_structure (caps, 0);
113 g_value_init (&list, GST_TYPE_LIST);
114 g_value_init (&fps, GST_TYPE_FRACTION);
115 for (n = 0; fpss[n][0] != 0; n++) {
116 gst_value_set_fraction (&fps, fpss[n][0], fpss[n][1]);
117 gst_value_list_append_value (&list, &fps);
118 }
119 gst_structure_set_value (structure, "framerate", &list);
120 g_value_unset (&list);
121 g_value_unset (&fps);
123 g_value_init (&list, GST_TYPE_LIST);
124 g_value_init (&fmt, GST_TYPE_FOURCC);
125 for (n = 0; fmts[n] != NULL; n++) {
126 gst_value_set_fourcc (&fmt, GST_STR_FOURCC (fmts[n]));
127 gst_value_list_append_value (&list, &fmt);
128 }
129 gst_structure_set_value (structure, "format", &list);
130 g_value_unset (&list);
131 g_value_unset (&fmt);
133 templ = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, caps);
134 }
135 return templ;
136 }
138 #ifdef enable_user_data
139 static GstStaticPadTemplate user_data_template_factory =
140 GST_STATIC_PAD_TEMPLATE ("user_data",
141 GST_PAD_SRC,
142 GST_PAD_ALWAYS,
143 GST_STATIC_CAPS_ANY);
144 #endif
146 static GstStaticPadTemplate sink_template_factory =
147 GST_STATIC_PAD_TEMPLATE ("sink",
148 GST_PAD_SINK,
149 GST_PAD_ALWAYS,
150 GST_STATIC_CAPS ("video/mpeg, "
151 "mpegversion = (int) [ 1, 2 ], " "systemstream = (boolean) false")
152 );
154 static void gst_mpeg2dec_base_init (gpointer g_class);
155 static void gst_mpeg2dec_class_init (GstMpeg2decClass * klass);
156 static void gst_mpeg2dec_init (GstMpeg2dec * mpeg2dec);
158 static void gst_mpeg2dec_dispose (GObject * object);
159 static void gst_mpeg2dec_reset (GstMpeg2dec * mpeg2dec);
161 static void gst_mpeg2dec_set_property (GObject * object, guint prop_id,
162 const GValue * value, GParamSpec * pspec);
163 static void gst_mpeg2dec_get_property (GObject * object, guint prop_id,
164 GValue * value, GParamSpec * pspec);
165 static void gst_mpeg2dec_set_index (GstElement * element, GstIndex * index);
166 static GstIndex *gst_mpeg2dec_get_index (GstElement * element);
168 static gboolean gst_mpeg2dec_src_event (GstPad * pad, GstEvent * event);
169 static const GstQueryType *gst_mpeg2dec_get_src_query_types (GstPad * pad);
171 static gboolean gst_mpeg2dec_src_query (GstPad * pad, GstQuery * query);
173 static gboolean gst_mpeg2dec_sink_convert (GstPad * pad, GstFormat src_format,
174 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
175 static gboolean gst_mpeg2dec_src_convert (GstPad * pad, GstFormat src_format,
176 gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
178 static GstStateChangeReturn gst_mpeg2dec_change_state (GstElement * element,
179 GstStateChange transition);
181 static gboolean gst_mpeg2dec_sink_event (GstPad * pad, GstEvent * event);
182 static GstFlowReturn gst_mpeg2dec_chain (GstPad * pad, GstBuffer * buf);
184 //static gboolean gst_mpeg2dec_sink_query (GstPad * pad, GstQuery * query);
185 static GstCaps *gst_mpeg2dec_src_getcaps (GstPad * pad);
187 #if 0
188 static const GstFormat *gst_mpeg2dec_get_formats (GstPad * pad);
189 #endif
191 #if 0
192 static const GstEventMask *gst_mpeg2dec_get_event_masks (GstPad * pad);
193 #endif
195 static GstElementClass *parent_class = NULL;
197 static gboolean crop_buffer (GstMpeg2dec * mpeg2dec, GstBuffer ** buf);
199 /*static guint gst_mpeg2dec_signals[LAST_SIGNAL] = { 0 };*/
201 GType
202 gst_mpeg2dec_get_type (void)
203 {
204 static GType mpeg2dec_type = 0;
206 if (!mpeg2dec_type) {
207 static const GTypeInfo mpeg2dec_info = {
208 sizeof (GstMpeg2decClass),
209 gst_mpeg2dec_base_init,
210 NULL,
211 (GClassInitFunc) gst_mpeg2dec_class_init,
212 NULL,
213 NULL,
214 sizeof (GstMpeg2dec),
215 0,
216 (GInstanceInitFunc) gst_mpeg2dec_init,
217 };
219 mpeg2dec_type =
220 g_type_register_static (GST_TYPE_ELEMENT, "GstMpeg2dec", &mpeg2dec_info,
221 0);
222 }
224 GST_DEBUG_CATEGORY_INIT (mpeg2dec_debug, "mpeg2dec", 0,
225 "MPEG2 decoder element");
227 return mpeg2dec_type;
228 }
230 static void
231 gst_mpeg2dec_base_init (gpointer g_class)
232 {
233 GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
235 gst_element_class_add_pad_template (element_class, src_templ ());
236 gst_element_class_add_pad_template (element_class,
237 gst_static_pad_template_get (&sink_template_factory));
238 #ifdef enable_user_data
239 gst_element_class_add_pad_template (element_class,
240 gst_static_pad_template_get (&user_data_template_factory));
241 #endif
242 gst_element_class_set_details (element_class, &gst_mpeg2dec_details);
243 }
245 static void
246 gst_mpeg2dec_class_init (GstMpeg2decClass * klass)
247 {
248 GObjectClass *gobject_class;
249 GstElementClass *gstelement_class;
251 gobject_class = (GObjectClass *) klass;
252 gstelement_class = (GstElementClass *) klass;
254 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
256 gobject_class->set_property = gst_mpeg2dec_set_property;
257 gobject_class->get_property = gst_mpeg2dec_get_property;
258 gobject_class->dispose = gst_mpeg2dec_dispose;
260 gstelement_class->change_state = gst_mpeg2dec_change_state;
261 gstelement_class->set_index = gst_mpeg2dec_set_index;
262 gstelement_class->get_index = gst_mpeg2dec_get_index;
263 }
265 static void
266 gst_mpeg2dec_init (GstMpeg2dec * mpeg2dec)
267 {
268 /* create the sink and src pads */
269 mpeg2dec->sinkpad =
270 gst_pad_new_from_template (gst_static_pad_template_get
271 (&sink_template_factory), "sink");
272 gst_element_add_pad (GST_ELEMENT (mpeg2dec), mpeg2dec->sinkpad);
273 gst_pad_set_chain_function (mpeg2dec->sinkpad,
274 GST_DEBUG_FUNCPTR (gst_mpeg2dec_chain));
275 //gst_pad_set_query_function (mpeg2dec->sinkpad,
276 // GST_DEBUG_FUNCPTR (gst_mpeg2dec_get_sink_query));
277 gst_pad_set_event_function (mpeg2dec->sinkpad,
278 GST_DEBUG_FUNCPTR (gst_mpeg2dec_sink_event));
280 mpeg2dec->srcpad = gst_pad_new_from_template (src_templ (), "src");
281 gst_element_add_pad (GST_ELEMENT (mpeg2dec), mpeg2dec->srcpad);
282 gst_pad_set_getcaps_function (mpeg2dec->srcpad,
283 GST_DEBUG_FUNCPTR (gst_mpeg2dec_src_getcaps));
284 gst_pad_set_event_function (mpeg2dec->srcpad,
285 GST_DEBUG_FUNCPTR (gst_mpeg2dec_src_event));
286 gst_pad_set_query_type_function (mpeg2dec->srcpad,
287 GST_DEBUG_FUNCPTR (gst_mpeg2dec_get_src_query_types));
288 gst_pad_set_query_function (mpeg2dec->srcpad,
289 GST_DEBUG_FUNCPTR (gst_mpeg2dec_src_query));
291 #ifdef enable_user_data
292 mpeg2dec->userdatapad =
293 gst_pad_new_from_template (gst_static_pad_template_get
294 (&user_data_template_factory), "user_data");
295 gst_element_add_pad (GST_ELEMENT (mpeg2dec), mpeg2dec->userdatapad);
296 #endif
298 mpeg2dec->error_count = 0;
300 /* initialize the mpeg2dec acceleration */
301 }
303 static void
304 gst_mpeg2dec_dispose (GObject * object)
305 {
306 GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (object);
308 if (mpeg2dec->decoder) {
309 GST_DEBUG_OBJECT (mpeg2dec, "closing decoder");
310 mpeg2_close (mpeg2dec->decoder);
311 mpeg2dec->decoder = NULL;
312 }
314 G_OBJECT_CLASS (parent_class)->dispose (object);
315 }
317 static void
318 gst_mpeg2dec_reset (GstMpeg2dec * mpeg2dec)
319 {
320 /* reset the initial video state */
321 mpeg2dec->format = MPEG2DEC_FORMAT_NONE;
322 mpeg2dec->width = -1;
323 mpeg2dec->height = -1;
324 mpeg2dec->segment_start = 0;
325 mpeg2dec->segment_end = -1;
326 mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
327 mpeg2dec->frame_period = 0;
328 mpeg2dec->need_sequence = TRUE;
329 mpeg2dec->next_time = 0;
330 mpeg2dec->offset = 0;
331 mpeg2dec->error_count = 0;
332 mpeg2_reset (mpeg2dec->decoder, 1);
333 }
335 static void
336 gst_mpeg2dec_set_index (GstElement * element, GstIndex * index)
337 {
338 GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (element);
340 mpeg2dec->index = index;
342 gst_index_get_writer_id (index, GST_OBJECT (element), &mpeg2dec->index_id);
343 }
345 static GstIndex *
346 gst_mpeg2dec_get_index (GstElement * element)
347 {
348 GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (element);
350 return mpeg2dec->index;
351 }
353 /* see gst-plugins/gst/games/gstvideoimage.c, paint_setup_I420() */
354 #define I420_Y_ROWSTRIDE(width) (GST_ROUND_UP_4(width))
355 #define I420_U_ROWSTRIDE(width) (GST_ROUND_UP_8(width)/2)
356 #define I420_V_ROWSTRIDE(width) ((GST_ROUND_UP_8(I420_Y_ROWSTRIDE(width)))/2)
358 #define I420_Y_OFFSET(w,h) (0)
359 #define I420_U_OFFSET(w,h) (I420_Y_OFFSET(w,h)+(I420_Y_ROWSTRIDE(w)*GST_ROUND_UP_2(h)))
360 #define I420_V_OFFSET(w,h) (I420_U_OFFSET(w,h)+(I420_U_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
362 #define I420_SIZE(w,h) (I420_V_OFFSET(w,h)+(I420_V_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
364 static GstBuffer *
365 crop_copy_i420_buffer (GstMpeg2dec * mpeg2dec, GstBuffer * input)
366 {
367 GstBuffer *outbuf;
368 guint8 *dest, *src;
369 guint outsize, line;
371 outsize = I420_SIZE (mpeg2dec->width, mpeg2dec->height);
372 GST_LOG_OBJECT (mpeg2dec, "Copying input buffer %ux%u (%u) to output buffer "
373 "%ux%u (%u)", mpeg2dec->decoded_width, mpeg2dec->decoded_height,
374 GST_BUFFER_SIZE (input), mpeg2dec->width, mpeg2dec->height, outsize);
375 outbuf = gst_buffer_new_and_alloc (outsize);
377 /* Copy Y first */
378 src = GST_BUFFER_DATA (input);
379 dest = GST_BUFFER_DATA (outbuf);
380 for (line = 0; line < mpeg2dec->height; line++) {
381 memcpy (dest, src, mpeg2dec->width);
382 dest += I420_Y_ROWSTRIDE (mpeg2dec->width);
383 src += I420_Y_ROWSTRIDE (mpeg2dec->decoded_width);
384 }
386 /* U */
387 src = GST_BUFFER_DATA (input)
388 + I420_U_OFFSET (mpeg2dec->decoded_width, mpeg2dec->decoded_height);
389 dest = GST_BUFFER_DATA (outbuf)
390 + I420_U_OFFSET (mpeg2dec->width, mpeg2dec->height);
391 for (line = 0; line < mpeg2dec->height / 2; line++) {
392 memcpy (dest, src, mpeg2dec->width / 2);
393 dest += I420_U_ROWSTRIDE (mpeg2dec->width);
394 src += I420_U_ROWSTRIDE (mpeg2dec->decoded_width);
395 }
397 /* V */
398 src = GST_BUFFER_DATA (input)
399 + I420_V_OFFSET (mpeg2dec->decoded_width, mpeg2dec->decoded_height);
400 dest = GST_BUFFER_DATA (outbuf)
401 + I420_V_OFFSET (mpeg2dec->width, mpeg2dec->height);
402 for (line = 0; line < mpeg2dec->height / 2; line++) {
403 memcpy (dest, src, mpeg2dec->width / 2);
404 dest += I420_V_ROWSTRIDE (mpeg2dec->width);
405 src += I420_V_ROWSTRIDE (mpeg2dec->decoded_width);
406 }
408 return outbuf;
409 }
411 /* FIXME: this is unlikely to be right stride-wise and offset-wise */
412 static GstBuffer *
413 crop_copy_i422_buffer (GstMpeg2dec * mpeg2dec, GstBuffer * input)
414 {
415 GstBuffer *outbuf;
416 guint8 *in_data, *out_data;
417 guint line;
419 outbuf = gst_buffer_new_and_alloc (mpeg2dec->width * mpeg2dec->height * 2);
421 /* Copy Y first */
422 in_data = GST_BUFFER_DATA (input);
423 out_data = GST_BUFFER_DATA (outbuf);
424 for (line = 0; line < mpeg2dec->height; line++) {
425 memcpy (out_data, in_data, mpeg2dec->width);
426 out_data += mpeg2dec->width;
427 in_data += mpeg2dec->decoded_width;
428 }
430 /* Now copy U & V */
431 in_data = GST_BUFFER_DATA (input)
432 + mpeg2dec->decoded_width * mpeg2dec->decoded_height;
433 for (line = 0; line < mpeg2dec->height; line++) {
434 memcpy (out_data, in_data, mpeg2dec->width / 2);
435 memcpy (out_data + mpeg2dec->width * mpeg2dec->height / 2,
436 in_data + mpeg2dec->decoded_width * mpeg2dec->decoded_height / 2,
437 mpeg2dec->width / 2);
438 out_data += mpeg2dec->width / 2;
439 in_data += mpeg2dec->decoded_width / 2;
440 }
442 return outbuf;
443 }
445 static gboolean
446 crop_buffer (GstMpeg2dec * mpeg2dec, GstBuffer ** buf)
447 {
448 gboolean result = FALSE;
449 GstBuffer *input = *buf;
450 GstBuffer *outbuf = input;
452 /*We crop only if the target region is smaller than the input one */
453 if ((mpeg2dec->decoded_width > mpeg2dec->width) ||
454 (mpeg2dec->decoded_height > mpeg2dec->height)) {
455 /* If we don't know about the format, we just return the original
456 * buffer.
457 */
458 if (mpeg2dec->format == MPEG2DEC_FORMAT_I422 ||
459 mpeg2dec->format == MPEG2DEC_FORMAT_I420 ||
460 mpeg2dec->format == MPEG2DEC_FORMAT_YV12) {
461 /*FIXME: I have tried to use gst_buffer_copy_on_write, but it
462 * still have some artifact, so I'me allocating new buffer
463 * for each frame decoded...
464 */
465 if (mpeg2dec->format == MPEG2DEC_FORMAT_I422) {
466 outbuf = crop_copy_i422_buffer (mpeg2dec, input);
467 } else {
468 outbuf = crop_copy_i420_buffer (mpeg2dec, input);
469 }
471 gst_buffer_set_caps (outbuf, GST_PAD_CAPS (mpeg2dec->srcpad));
472 gst_buffer_stamp (outbuf, input);
474 *buf = outbuf;
475 result = TRUE;
476 }
477 }
479 return result;
480 }
482 static GstFlowReturn
483 gst_mpeg2dec_alloc_buffer (GstMpeg2dec * mpeg2dec, gint64 offset,
484 GstBuffer ** obuf)
485 {
486 GstBuffer *outbuf = NULL;
487 gint size = mpeg2dec->decoded_width * mpeg2dec->decoded_height;
488 guint8 *buf[3], *out = NULL;
489 GstFlowReturn ret = GST_FLOW_OK;
491 if (mpeg2dec->format == MPEG2DEC_FORMAT_I422) {
492 ret =
493 gst_pad_alloc_buffer_and_set_caps (mpeg2dec->srcpad,
494 GST_BUFFER_OFFSET_NONE, size * 2, GST_PAD_CAPS (mpeg2dec->srcpad),
495 &outbuf);
496 if (ret != GST_FLOW_OK)
497 goto no_buffer;
499 out = GST_BUFFER_DATA (outbuf);
501 buf[0] = out;
502 buf[1] = buf[0] + size;
503 buf[2] = buf[1] + size / 2;
505 } else {
506 ret =
507 gst_pad_alloc_buffer_and_set_caps (mpeg2dec->srcpad,
508 GST_BUFFER_OFFSET_NONE, (size * 3) / 2, GST_PAD_CAPS (mpeg2dec->srcpad),
509 &outbuf);
510 if (ret != GST_FLOW_OK)
511 goto no_buffer;
513 out = GST_BUFFER_DATA (outbuf);
515 buf[0] = out;
516 if (mpeg2dec->format == MPEG2DEC_FORMAT_I420) {
517 buf[0] = out;
518 buf[1] = buf[0] + size;
519 buf[2] = buf[1] + size / 4;
520 } else {
521 buf[0] = out;
522 buf[2] = buf[0] + size;
523 buf[1] = buf[2] + size / 4;
524 }
525 }
527 mpeg2_set_buf (mpeg2dec->decoder, buf, outbuf);
529 /* we store the original byteoffset of this picture in the stream here
530 * because we need it for indexing */
531 GST_BUFFER_OFFSET (outbuf) = offset;
533 done:
534 if (ret != GST_FLOW_OK) {
535 outbuf = NULL; /* just to asure NULL return, looking the path
536 above it happens only when gst_pad_alloc_buffer_and_set_caps
537 fails to alloc outbf */
538 }
539 *obuf = outbuf;
541 return ret;
543 /* ERRORS */
544 no_buffer:
545 {
546 if (GST_FLOW_IS_FATAL (ret)) {
547 GST_ELEMENT_ERROR (mpeg2dec, RESOURCE, FAILED, (NULL),
548 ("Failed to allocate memory for buffer, reason %s",
549 gst_flow_get_name (ret)));
550 }
551 goto done;
552 }
553 }
555 static gboolean
556 gst_mpeg2dec_negotiate_format (GstMpeg2dec * mpeg2dec)
557 {
558 GstCaps *caps;
559 guint32 fourcc;
560 const mpeg2_info_t *info;
561 const mpeg2_sequence_t *sequence;
563 info = mpeg2_info (mpeg2dec->decoder);
564 sequence = info->sequence;
566 if (sequence->width != sequence->chroma_width &&
567 sequence->height != sequence->chroma_height) {
568 fourcc = GST_STR_FOURCC ("I420");
569 mpeg2dec->format = MPEG2DEC_FORMAT_I420;
570 } else if (sequence->width == sequence->chroma_width ||
571 sequence->height == sequence->chroma_height) {
572 fourcc = GST_STR_FOURCC ("Y42B");
573 mpeg2dec->format = MPEG2DEC_FORMAT_I422;
574 } else {
575 g_warning ("mpeg2dec: 4:4:4 format not yet supported");
576 return (FALSE);
577 }
579 caps = gst_caps_new_simple ("video/x-raw-yuv",
580 "format", GST_TYPE_FOURCC, fourcc,
581 "width", G_TYPE_INT, mpeg2dec->width,
582 "height", G_TYPE_INT, mpeg2dec->height,
583 "pixel-aspect-ratio", GST_TYPE_FRACTION, mpeg2dec->pixel_width,
584 mpeg2dec->pixel_height,
585 "framerate", GST_TYPE_FRACTION, mpeg2dec->fps_n, mpeg2dec->fps_d, NULL);
587 gst_pad_set_caps (mpeg2dec->srcpad, caps);
588 gst_caps_unref (caps);
590 return TRUE;
591 }
593 static GstFlowReturn
594 handle_sequence (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info)
595 {
596 gint i;
597 GstBuffer *buf;
598 GstFlowReturn ret;
599 guint8 *dummybuf[3] = { NULL, NULL, NULL };
601 mpeg2dec->width = info->sequence->picture_width;
602 mpeg2dec->height = info->sequence->picture_height;
603 mpeg2dec->pixel_width = info->sequence->pixel_width;
604 mpeg2dec->pixel_height = info->sequence->pixel_height;
605 mpeg2dec->decoded_width = info->sequence->width;
606 mpeg2dec->decoded_height = info->sequence->height;
607 mpeg2dec->total_frames = 0;
609 /* find framerate */
610 for (i = 0; i < 9; i++) {
611 if (info->sequence->frame_period == frame_periods[i]) {
612 mpeg2dec->fps_n = fpss[i][0];
613 mpeg2dec->fps_d = fpss[i][1];
614 }
615 }
616 mpeg2dec->frame_period = info->sequence->frame_period * GST_USECOND / 27;
618 GST_DEBUG_OBJECT (mpeg2dec,
619 "sequence flags: %d, frame period: %d (%g), frame rate: %d/%d",
620 info->sequence->flags, info->sequence->frame_period,
621 (double) (mpeg2dec->frame_period) / GST_SECOND, mpeg2dec->fps_n,
622 mpeg2dec->fps_d);
623 GST_DEBUG_OBJECT (mpeg2dec, "profile: %02x, colour_primaries: %d",
624 info->sequence->profile_level_id, info->sequence->colour_primaries);
625 GST_DEBUG_OBJECT (mpeg2dec, "transfer chars: %d, matrix coef: %d",
626 info->sequence->transfer_characteristics,
627 info->sequence->matrix_coefficients);
629 if (!gst_mpeg2dec_negotiate_format (mpeg2dec))
630 goto negotiate_failed;
632 mpeg2_custom_fbuf (mpeg2dec->decoder, 1);
633 /* Pump in some null buffers, because otherwise libmpeg2 doesn't
634 * initialise the discard_fbuf->id */
635 mpeg2_set_buf (mpeg2dec->decoder, dummybuf, NULL);
636 mpeg2_set_buf (mpeg2dec->decoder, dummybuf, NULL);
637 mpeg2_set_buf (mpeg2dec->decoder, dummybuf, NULL);
639 ret = gst_mpeg2dec_alloc_buffer (mpeg2dec, mpeg2dec->offset, &buf);
640 if (ret != GST_FLOW_OK)
641 goto done;
643 /* libmpeg2 discards first buffer twice for some reason. */
644 gst_buffer_ref (buf);
646 mpeg2dec->need_sequence = FALSE;
648 done:
649 return ret;
651 negotiate_failed:
652 {
653 GST_ELEMENT_ERROR (mpeg2dec, CORE, NEGOTIATION, (NULL), (NULL));
654 ret = GST_FLOW_NOT_NEGOTIATED;
655 goto done;
656 }
657 }
659 static GstFlowReturn
660 handle_picture (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info)
661 {
662 gboolean key_frame = FALSE;
663 GstBuffer *outbuf;
664 GstFlowReturn ret;
666 GST_DEBUG_OBJECT (mpeg2dec, "handle picture");
668 if (info->current_picture) {
669 key_frame =
670 (info->current_picture->flags & PIC_MASK_CODING_TYPE) ==
671 PIC_FLAG_CODING_TYPE_I;
672 }
673 ret = gst_mpeg2dec_alloc_buffer (mpeg2dec, mpeg2dec->offset, &outbuf);
674 if (ret != GST_FLOW_OK)
675 goto done;
677 GST_DEBUG_OBJECT (mpeg2dec, "picture %s, outbuf %p, offset %"
678 G_GINT64_FORMAT,
679 key_frame ? ", kf," : " ", outbuf, GST_BUFFER_OFFSET (outbuf)
680 );
682 if (mpeg2dec->discont_state == MPEG2DEC_DISC_NEW_PICTURE && key_frame)
683 mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_KEYFRAME;
685 mpeg2_skip (mpeg2dec->decoder, 0);
687 done:
688 return ret;
689 }
691 static GstFlowReturn
692 handle_slice (GstMpeg2dec * mpeg2dec, const mpeg2_info_t * info)
693 {
694 GstBuffer *outbuf = NULL;
695 GstFlowReturn ret = GST_FLOW_OK;
697 GST_DEBUG_OBJECT (mpeg2dec, "picture slice/end %p %p %p %p",
698 info->display_fbuf,
699 info->display_picture, info->current_picture,
700 (info->display_fbuf ? info->display_fbuf->id : NULL));
702 if (info->display_fbuf && info->display_fbuf->id) {
703 const mpeg2_picture_t *picture;
704 gboolean key_frame = FALSE;
705 GstClockTime time;
707 outbuf = GST_BUFFER (info->display_fbuf->id);
709 picture = info->display_picture;
711 key_frame =
712 (picture->flags & PIC_MASK_CODING_TYPE) == PIC_FLAG_CODING_TYPE_I;
714 GST_DEBUG_OBJECT (mpeg2dec, "picture keyframe %d", key_frame);
716 if (!key_frame)
717 GST_BUFFER_FLAG_SET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
718 else
719 GST_BUFFER_FLAG_UNSET (outbuf, GST_BUFFER_FLAG_DELTA_UNIT);
721 if (mpeg2dec->discont_state == MPEG2DEC_DISC_NEW_KEYFRAME && key_frame)
722 mpeg2dec->discont_state = MPEG2DEC_DISC_NONE;
724 time = GST_CLOCK_TIME_NONE;
726 #if MPEG2_RELEASE < MPEG2_VERSION(0,4,0)
727 if (picture->flags & PIC_FLAG_PTS)
728 time = MPEG_TIME_TO_GST_TIME (picture->pts);
729 #else
730 if (picture->flags & PIC_FLAG_TAGS)
731 time = MPEG_TIME_TO_GST_TIME ((GstClockTime) (picture->
732 tag2) << 32 | picture->tag);
733 #endif
735 if (time == GST_CLOCK_TIME_NONE) {
736 time = mpeg2dec->next_time;
737 GST_DEBUG_OBJECT (mpeg2dec, "picture didn't have pts");
738 } else {
739 GST_DEBUG_OBJECT (mpeg2dec,
740 "picture had pts %" GST_TIME_FORMAT ", we had %"
741 GST_TIME_FORMAT, GST_TIME_ARGS (time),
742 GST_TIME_ARGS (mpeg2dec->next_time));
743 mpeg2dec->next_time = time;
744 }
745 GST_BUFFER_TIMESTAMP (outbuf) = time;
747 /* TODO set correct offset here based on frame number */
748 if (info->display_picture_2nd) {
749 GST_BUFFER_DURATION (outbuf) = (picture->nb_fields +
750 info->display_picture_2nd->nb_fields) * mpeg2dec->frame_period / 2;
751 } else {
752 GST_BUFFER_DURATION (outbuf) =
753 picture->nb_fields * mpeg2dec->frame_period / 2;
754 }
755 mpeg2dec->next_time += GST_BUFFER_DURATION (outbuf);
757 GST_DEBUG_OBJECT (mpeg2dec,
758 "picture: %s %s fields:%d off:%" G_GINT64_FORMAT " ts:%"
759 GST_TIME_FORMAT,
760 (picture->flags & PIC_FLAG_TOP_FIELD_FIRST ? "tff " : " "),
761 (picture->flags & PIC_FLAG_PROGRESSIVE_FRAME ? "prog" : " "),
762 picture->nb_fields, GST_BUFFER_OFFSET (outbuf),
763 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)));
765 if (mpeg2dec->index) {
766 gst_index_add_association (mpeg2dec->index, mpeg2dec->index_id,
767 (key_frame ? GST_ASSOCIATION_FLAG_KEY_UNIT : 0),
768 GST_FORMAT_BYTES, GST_BUFFER_OFFSET (outbuf),
769 GST_FORMAT_TIME, GST_BUFFER_TIMESTAMP (outbuf), 0);
770 }
772 if (picture->flags & PIC_FLAG_SKIP) {
773 GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer because of skip flag");
774 } else if (mpeg2dec->discont_state != MPEG2DEC_DISC_NONE) {
775 GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer, discont state %d",
776 mpeg2dec->discont_state);
777 } else if (mpeg2dec->next_time < mpeg2dec->segment_start) {
778 GST_DEBUG_OBJECT (mpeg2dec, "dropping buffer, next_time %"
779 GST_TIME_FORMAT " < segment_start %" GST_TIME_FORMAT,
780 GST_TIME_ARGS (mpeg2dec->next_time),
781 GST_TIME_ARGS (mpeg2dec->segment_start));
782 } else {
783 gboolean cropped_outbuf_different_from_outbuf = FALSE;
785 GST_LOG_OBJECT (mpeg2dec, "pushing buffer, timestamp %"
786 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
787 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (outbuf)),
788 GST_TIME_ARGS (GST_BUFFER_DURATION (outbuf)));
790 if ((mpeg2dec->decoded_height > mpeg2dec->height) ||
791 (mpeg2dec->decoded_width > mpeg2dec->width)) {
792 cropped_outbuf_different_from_outbuf = crop_buffer (mpeg2dec, &outbuf);
793 }
795 gst_buffer_ref (outbuf);
796 ret = gst_pad_push (mpeg2dec->srcpad, outbuf);
797 if (cropped_outbuf_different_from_outbuf)
798 gst_buffer_unref (outbuf);
799 }
800 }
802 if (info->discard_fbuf && info->discard_fbuf->id) {
803 GstBuffer *discard = GST_BUFFER (info->discard_fbuf->id);
805 gst_buffer_unref (discard);
806 GST_DEBUG_OBJECT (mpeg2dec, "Discarded buffer %p", discard);
807 }
808 return ret;
809 }
811 #if 0
812 static void
813 update_streaminfo (GstMpeg2dec * mpeg2dec)
814 {
815 GstCaps *caps;
816 GstProps *props;
817 GstPropsEntry *entry;
818 const mpeg2_info_t *info;
820 info = mpeg2_info (mpeg2dec->decoder);
822 props = gst_props_empty_new ();
824 entry =
825 gst_props_entry_new ("framerate",
826 G_TYPE_DOUBLE (GST_SECOND / (float) mpeg2dec->frame_period));
827 gst_props_add_entry (props, entry);
828 entry =
829 gst_props_entry_new ("bitrate",
830 G_TYPE_INT (info->sequence->byte_rate * 8));
831 gst_props_add_entry (props, entry);
833 caps = gst_caps_new ("mpeg2dec_streaminfo",
834 "application/x-gst-streaminfo", props);
836 gst_caps_replace_sink (&mpeg2dec->streaminfo, caps);
837 g_object_notify (G_OBJECT (mpeg2dec), "streaminfo");
838 }
839 #endif
841 static GstFlowReturn
842 gst_mpeg2dec_chain (GstPad * pad, GstBuffer * buf)
843 {
844 GstMpeg2dec *mpeg2dec;
845 guint32 size;
846 guint8 *data, *end;
847 GstClockTime pts;
848 const mpeg2_info_t *info;
849 mpeg2_state_t state;
850 gboolean done = FALSE;
851 GstFlowReturn ret = GST_FLOW_OK;
853 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
855 size = GST_BUFFER_SIZE (buf);
856 data = GST_BUFFER_DATA (buf);
857 pts = GST_BUFFER_TIMESTAMP (buf);
859 GST_LOG_OBJECT (mpeg2dec, "received buffer, timestamp %"
860 GST_TIME_FORMAT ", duration %" GST_TIME_FORMAT,
861 GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buf)),
862 GST_TIME_ARGS (GST_BUFFER_DURATION (buf)));
864 info = mpeg2dec->info;
865 end = data + size;
867 mpeg2dec->offset = GST_BUFFER_OFFSET (buf);
869 while (!done) {
870 GST_LOG_OBJECT (mpeg2dec, "calling parse");
871 state = mpeg2_parse (mpeg2dec->decoder);
872 GST_DEBUG_OBJECT (mpeg2dec, "parse state %d", state);
874 switch (state) {
875 case STATE_SEQUENCE:
876 ret = handle_sequence (mpeg2dec, info);
877 break;
878 case STATE_SEQUENCE_REPEATED:
879 GST_DEBUG_OBJECT (mpeg2dec, "sequence repeated");
880 break;
881 case STATE_GOP:
882 break;
883 case STATE_PICTURE:
884 ret = handle_picture (mpeg2dec, info);
885 break;
886 case STATE_SLICE_1ST:
887 GST_LOG_OBJECT (mpeg2dec, "1st slice of frame encountered");
888 break;
889 case STATE_PICTURE_2ND:
890 GST_LOG_OBJECT (mpeg2dec,
891 "Second picture header encountered. Decoding 2nd field");
892 break;
893 #if MPEG2_RELEASE >= MPEG2_VERSION (0, 4, 0)
894 case STATE_INVALID_END:
895 #endif
896 case STATE_END:
897 mpeg2dec->need_sequence = TRUE;
898 case STATE_SLICE:
899 ret = handle_slice (mpeg2dec, info);
900 break;
901 case STATE_BUFFER:
902 if (data == NULL) {
903 done = TRUE;
904 } else {
905 if (pts != GST_CLOCK_TIME_NONE) {
906 gint64 mpeg_pts = GST_TIME_TO_MPEG_TIME (pts);
908 GST_DEBUG_OBJECT (mpeg2dec,
909 "have pts: %" G_GINT64_FORMAT " (%" GST_TIME_FORMAT ")",
910 mpeg_pts, GST_TIME_ARGS (MPEG_TIME_TO_GST_TIME (mpeg_pts)));
912 #if MPEG2_RELEASE >= MPEG2_VERSION(0,4,0)
913 mpeg2_tag_picture (mpeg2dec->decoder, mpeg_pts & 0xffffffff,
914 mpeg_pts >> 32);
915 #else
916 mpeg2_pts (mpeg2dec->decoder, mpeg_pts);
917 #endif
918 } else {
919 GST_LOG ("no pts");
920 }
922 GST_LOG_OBJECT (mpeg2dec, "calling mpeg2_buffer");
923 mpeg2_buffer (mpeg2dec->decoder, data, end);
924 GST_LOG_OBJECT (mpeg2dec, "calling mpeg2_buffer done");
926 data = NULL;
927 }
928 break;
929 /* error */
930 case STATE_INVALID:
931 mpeg2dec->error_count++;
932 GST_WARNING_OBJECT (mpeg2dec, "Decoding error #%d",
933 mpeg2dec->error_count);
934 if (mpeg2dec->error_count >= MAX_ERROR_COUNT && MAX_ERROR_COUNT > 0) {
935 GST_WARNING_OBJECT (mpeg2dec, "Too many decoding errors");
936 goto exit_error;
937 }
938 goto exit;
939 default:
940 GST_ERROR_OBJECT (mpeg2dec, "Unknown libmpeg2 state %d, FIXME", state);
941 goto exit;
942 }
944 mpeg2dec->error_count = 0;
946 /*
947 * FIXME: should pass more information such as state the user data is from
948 */
949 #ifdef enable_user_data
950 if (info->user_data_len > 0) {
951 GstBuffer *udbuf = gst_buffer_new_and_alloc (info->user_data_len);
953 memcpy (GST_BUFFER_DATA (udbuf), info->user_data, info->user_data_len);
955 gst_pad_push (mpeg2dec->userdatapad, udbuf);
956 }
957 #endif
959 if (ret != GST_FLOW_OK) {
960 mpeg2_reset (mpeg2dec->decoder, 0);
961 break;
962 }
963 }
964 gst_buffer_unref (buf);
965 return ret;
967 exit:
968 gst_buffer_unref (buf);
969 return GST_FLOW_OK;
971 exit_error:
972 GST_ELEMENT_ERROR (mpeg2dec, STREAM, DECODE, (NULL), (NULL));
973 gst_buffer_unref (buf);
974 return GST_FLOW_ERROR;
975 }
977 static gboolean
978 gst_mpeg2dec_sink_event (GstPad * pad, GstEvent * event)
979 {
981 GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
982 gboolean ret = TRUE;
984 GST_DEBUG_OBJECT (mpeg2dec, "Got %s event on sink pad",
985 GST_EVENT_TYPE_NAME (event));
987 switch (GST_EVENT_TYPE (event)) {
988 case GST_EVENT_NEWSEGMENT:
989 {
990 mpeg2dec->next_time = -1;;
991 ret = gst_pad_event_default (pad, event);
992 break;
993 }
994 case GST_EVENT_FLUSH_START:
995 ret = gst_pad_event_default (pad, event);
996 break;
997 case GST_EVENT_FLUSH_STOP:
998 mpeg2dec->discont_state = MPEG2DEC_DISC_NEW_PICTURE;
999 mpeg2dec->next_time = -1;;
1000 mpeg2_reset (mpeg2dec->decoder, 0);
1001 ret = gst_pad_event_default (pad, event);
1002 break;
1003 case GST_EVENT_EOS:
1004 if (mpeg2dec->index && mpeg2dec->closed) {
1005 gst_index_commit (mpeg2dec->index, mpeg2dec->index_id);
1006 }
1007 ret = gst_pad_event_default (pad, event);
1008 break;
1009 default:
1010 ret = gst_pad_event_default (pad, event);
1011 break;
1012 }
1014 return ret;
1016 }
1018 static GstCaps *
1019 gst_mpeg2dec_src_getcaps (GstPad * pad)
1020 {
1021 GstCaps *caps;
1023 GST_OBJECT_LOCK (pad);
1024 if (!(caps = GST_PAD_CAPS (pad)))
1025 caps = (GstCaps *) gst_pad_get_pad_template_caps (pad);
1026 caps = gst_caps_ref (caps);
1027 GST_OBJECT_UNLOCK (pad);
1029 return caps;
1030 }
1032 static gboolean
1033 gst_mpeg2dec_sink_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
1034 GstFormat * dest_format, gint64 * dest_value)
1035 {
1036 gboolean res = TRUE;
1037 GstMpeg2dec *mpeg2dec;
1038 const mpeg2_info_t *info;
1040 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1042 if (mpeg2dec->decoder == NULL)
1043 return FALSE;
1045 if (src_format == *dest_format) {
1046 *dest_value = src_value;
1047 return TRUE;
1048 }
1050 info = mpeg2_info (mpeg2dec->decoder);
1052 switch (src_format) {
1053 case GST_FORMAT_BYTES:
1054 switch (*dest_format) {
1055 case GST_FORMAT_TIME:
1056 if (info->sequence && info->sequence->byte_rate) {
1057 *dest_value = GST_SECOND * src_value / info->sequence->byte_rate;
1058 break;
1059 }
1060 default:
1061 res = FALSE;
1062 }
1063 break;
1064 case GST_FORMAT_TIME:
1065 switch (*dest_format) {
1066 case GST_FORMAT_BYTES:
1067 if (info->sequence && info->sequence->byte_rate) {
1068 *dest_value = src_value * info->sequence->byte_rate / GST_SECOND;
1069 break;
1070 }
1071 default:
1072 res = FALSE;
1073 }
1074 break;
1075 default:
1076 res = FALSE;
1077 }
1078 return res;
1079 }
1082 static gboolean
1083 gst_mpeg2dec_src_convert (GstPad * pad, GstFormat src_format, gint64 src_value,
1084 GstFormat * dest_format, gint64 * dest_value)
1085 {
1086 gboolean res = TRUE;
1087 GstMpeg2dec *mpeg2dec;
1088 const mpeg2_info_t *info;
1089 guint64 scale = 1;
1091 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1093 if (mpeg2dec->decoder == NULL)
1094 return FALSE;
1096 if (src_format == *dest_format) {
1097 *dest_value = src_value;
1098 return TRUE;
1099 }
1101 info = mpeg2_info (mpeg2dec->decoder);
1103 switch (src_format) {
1104 case GST_FORMAT_BYTES:
1105 switch (*dest_format) {
1106 case GST_FORMAT_TIME:
1107 default:
1108 res = FALSE;
1109 }
1110 break;
1111 case GST_FORMAT_TIME:
1112 switch (*dest_format) {
1113 case GST_FORMAT_BYTES:
1114 scale = 6 * (mpeg2dec->width * mpeg2dec->height >> 2);
1115 case GST_FORMAT_DEFAULT:
1116 if (info->sequence && mpeg2dec->frame_period) {
1117 *dest_value = src_value * scale / mpeg2dec->frame_period;
1118 break;
1119 }
1120 default:
1121 res = FALSE;
1122 }
1123 break;
1124 case GST_FORMAT_DEFAULT:
1125 switch (*dest_format) {
1126 case GST_FORMAT_TIME:
1127 *dest_value = src_value * mpeg2dec->frame_period;
1128 break;
1129 case GST_FORMAT_BYTES:
1130 *dest_value =
1131 src_value * 6 * ((mpeg2dec->width * mpeg2dec->height) >> 2);
1132 break;
1133 default:
1134 res = FALSE;
1135 }
1136 break;
1137 default:
1138 res = FALSE;
1139 }
1140 return res;
1141 }
1143 static const GstQueryType *
1144 gst_mpeg2dec_get_src_query_types (GstPad * pad)
1145 {
1146 static const GstQueryType types[] = {
1147 GST_QUERY_POSITION,
1148 GST_QUERY_DURATION,
1149 0
1150 };
1152 return types;
1153 }
1155 static gboolean
1156 gst_mpeg2dec_src_query (GstPad * pad, GstQuery * query)
1157 {
1158 gboolean res = TRUE;
1159 GstMpeg2dec *mpeg2dec;
1161 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1163 switch (GST_QUERY_TYPE (query)) {
1164 case GST_QUERY_POSITION:
1165 {
1166 GstFormat format;
1167 gint64 cur;
1169 /* save requested format */
1170 gst_query_parse_position (query, &format, NULL);
1172 /* and convert to the requested format */
1173 if (!gst_mpeg2dec_src_convert (pad, GST_FORMAT_TIME,
1174 mpeg2dec->next_time, &format, &cur))
1175 goto error;
1177 gst_query_set_position (query, format, cur);
1179 GST_LOG_OBJECT (mpeg2dec,
1180 "position query: we return %llu (format %u)", cur, format);
1181 break;
1182 }
1183 case GST_QUERY_DURATION:
1184 {
1185 GstFormat format;
1186 GstFormat rformat;
1187 gint64 total, total_bytes;
1188 GstPad *peer;
1190 if ((peer = gst_pad_get_peer (mpeg2dec->sinkpad)) == NULL)
1191 goto error;
1193 /* send to peer */
1194 if ((res = gst_pad_query (peer, query))) {
1195 gst_object_unref (peer);
1196 goto done;
1197 } else {
1198 GST_LOG_OBJECT (mpeg2dec, "query on peer pad failed, trying bytes");
1199 }
1201 /* save requested format */
1202 gst_query_parse_duration (query, &format, NULL);
1204 /* query peer for total length in bytes */
1205 gst_query_set_duration (query, GST_FORMAT_BYTES, -1);
1207 if (!(res = gst_pad_query (peer, query))) {
1208 GST_LOG_OBJECT (mpeg2dec, "query on peer pad failed");
1209 gst_object_unref (peer);
1210 goto error;
1211 }
1212 gst_object_unref (peer);
1214 /* get the returned format */
1215 gst_query_parse_duration (query, &rformat, &total_bytes);
1216 GST_LOG_OBJECT (mpeg2dec, "peer pad returned total=%lld bytes",
1217 total_bytes);
1219 if (total_bytes != -1) {
1220 if (!gst_mpeg2dec_sink_convert (pad, GST_FORMAT_BYTES, total_bytes,
1221 &format, &total))
1222 goto error;
1223 } else {
1224 total = -1;
1225 }
1227 gst_query_set_duration (query, format, total);
1229 GST_LOG_OBJECT (mpeg2dec,
1230 "position query: we return %llu (format %u)", total, format);
1231 break;
1232 }
1233 default:
1234 res = gst_pad_query_default (pad, query);
1235 break;
1236 }
1237 done:
1238 return res;
1240 error:
1242 GST_DEBUG ("error handling query");
1243 return FALSE;
1244 }
1247 #if 0
1248 static const GstEventMask *
1249 gst_mpeg2dec_get_event_masks (GstPad * pad)
1250 {
1251 static const GstEventMask masks[] = {
1252 {GST_EVENT_SEEK, GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH},
1253 {GST_EVENT_NAVIGATION, GST_EVENT_FLAG_NONE},
1254 {0,}
1255 };
1257 return masks;
1258 }
1259 #endif
1261 static gboolean
1262 index_seek (GstPad * pad, GstEvent * event)
1263 {
1264 GstIndexEntry *entry;
1265 GstMpeg2dec *mpeg2dec;
1266 gdouble rate;
1267 GstFormat format;
1268 GstSeekFlags flags;
1269 GstSeekType cur_type, stop_type;
1270 gint64 cur, stop;
1272 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1274 gst_event_parse_seek (event, &rate, &format, &flags,
1275 &cur_type, &cur, &stop_type, &stop);
1277 entry = gst_index_get_assoc_entry (mpeg2dec->index, mpeg2dec->index_id,
1278 GST_INDEX_LOOKUP_BEFORE, GST_ASSOCIATION_FLAG_KEY_UNIT, format, cur);
1280 if ((entry) && gst_pad_is_linked (mpeg2dec->sinkpad)) {
1281 const GstFormat *peer_formats, *try_formats;
1283 /* since we know the exact byteoffset of the frame, make sure to seek on bytes first */
1284 const GstFormat try_all_formats[] = {
1285 GST_FORMAT_BYTES,
1286 GST_FORMAT_TIME,
1287 0
1288 };
1290 try_formats = try_all_formats;
1292 #if 0
1293 peer_formats = gst_pad_get_formats (GST_PAD_PEER (mpeg2dec->sinkpad));
1294 #else
1295 peer_formats = try_all_formats; /* FIXE ME */
1296 #endif
1298 while (gst_formats_contains (peer_formats, *try_formats)) {
1299 gint64 value;
1301 if (gst_index_entry_assoc_map (entry, *try_formats, &value)) {
1302 GstEvent *seek_event;
1304 GST_DEBUG_OBJECT (mpeg2dec, "index %s %" G_GINT64_FORMAT
1305 " -> %s %" G_GINT64_FORMAT,
1306 gst_format_get_details (format)->nick,
1307 cur, gst_format_get_details (*try_formats)->nick, value);
1309 /* lookup succeeded, create the seek */
1310 seek_event =
1311 gst_event_new_seek (rate, *try_formats, flags, cur_type, value,
1312 stop_type, stop);
1313 /* do the seek */
1314 if (gst_pad_push_event (mpeg2dec->sinkpad, seek_event)) {
1315 /* seek worked, we're done, loop will exit */
1316 #if 0
1317 mpeg2dec->segment_start = GST_EVENT_SEEK_OFFSET (event);
1318 #endif
1319 return TRUE;
1320 }
1321 }
1322 try_formats++;
1323 }
1324 }
1325 return FALSE;
1326 }
1329 static gboolean
1330 normal_seek (GstPad * pad, GstEvent * event)
1331 {
1332 gdouble rate;
1333 GstFormat format, conv;
1334 GstSeekFlags flags;
1335 GstSeekType cur_type, stop_type;
1336 gint64 cur, stop;
1337 gint64 time_cur, bytes_cur;
1338 gint64 time_stop, bytes_stop;
1339 gboolean res;
1340 GstMpeg2dec *mpeg2dec;
1341 GstEvent *peer_event;
1343 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1345 GST_DEBUG ("normal seek");
1347 gst_event_parse_seek (event, &rate, &format, &flags,
1348 &cur_type, &cur, &stop_type, &stop);
1350 conv = GST_FORMAT_TIME;
1351 if (!gst_mpeg2dec_src_convert (pad, format, cur, &conv, &time_cur))
1352 goto convert_failed;
1353 if (!gst_mpeg2dec_src_convert (pad, format, stop, &conv, &time_stop))
1354 goto convert_failed;
1356 GST_DEBUG ("seek to time %" GST_TIME_FORMAT "-%" GST_TIME_FORMAT,
1357 GST_TIME_ARGS (time_cur), GST_TIME_ARGS (time_stop));
1359 peer_event = gst_event_new_seek (rate, GST_FORMAT_TIME, flags,
1360 cur_type, time_cur, stop_type, time_stop);
1362 /* try seek on time then */
1363 if ((res = gst_pad_push_event (mpeg2dec->sinkpad, peer_event)))
1364 goto done;
1366 /* else we try to seek on bytes */
1367 conv = GST_FORMAT_BYTES;
1368 if (!gst_mpeg2dec_sink_convert (pad, GST_FORMAT_TIME, time_cur,
1369 &conv, &bytes_cur))
1370 goto convert_failed;
1371 if (!gst_mpeg2dec_sink_convert (pad, GST_FORMAT_TIME, time_stop,
1372 &conv, &bytes_stop))
1373 goto convert_failed;
1375 /* conversion succeeded, create the seek */
1376 peer_event =
1377 gst_event_new_seek (rate, GST_FORMAT_BYTES, flags,
1378 cur_type, bytes_cur, stop_type, bytes_stop);
1380 /* do the seek */
1381 res = gst_pad_push_event (mpeg2dec->sinkpad, peer_event);
1383 done:
1384 return res;
1386 /* ERRORS */
1387 convert_failed:
1388 {
1389 /* probably unsupported seek format */
1390 GST_DEBUG_OBJECT (mpeg2dec,
1391 "failed to convert format %u into GST_FORMAT_TIME", format);
1392 return FALSE;
1393 }
1394 }
1397 static gboolean
1398 gst_mpeg2dec_src_event (GstPad * pad, GstEvent * event)
1399 {
1400 gboolean res;
1401 GstMpeg2dec *mpeg2dec;
1403 mpeg2dec = GST_MPEG2DEC (GST_PAD_PARENT (pad));
1405 if (mpeg2dec->decoder == NULL)
1406 goto no_decoder;
1408 switch (GST_EVENT_TYPE (event)) {
1409 /* the all-formats seek logic */
1410 case GST_EVENT_SEEK:{
1411 gst_event_ref (event);
1412 if (!(res = gst_pad_event_default (pad, event))) {
1413 if (mpeg2dec->index)
1414 res = index_seek (pad, event);
1415 else
1416 res = normal_seek (pad, event);
1417 }
1418 gst_event_unref (event);
1419 break;
1420 }
1421 case GST_EVENT_NAVIGATION:
1422 /* Forward a navigation event unchanged */
1423 default:
1424 res = gst_pad_push_event (mpeg2dec->sinkpad, event);
1425 break;
1426 }
1427 return res;
1429 no_decoder:
1430 {
1431 GST_DEBUG_OBJECT (mpeg2dec, "no decoder, cannot handle event");
1432 gst_event_unref (event);
1433 return FALSE;
1434 }
1435 }
1437 static GstStateChangeReturn
1438 gst_mpeg2dec_change_state (GstElement * element, GstStateChange transition)
1439 {
1440 GstStateChangeReturn ret;
1441 GstMpeg2dec *mpeg2dec = GST_MPEG2DEC (element);
1443 switch (transition) {
1444 case GST_STATE_CHANGE_NULL_TO_READY:
1445 mpeg2_accel (MPEG2_ACCEL_DETECT);
1446 if ((mpeg2dec->decoder = mpeg2_init ()) == NULL)
1447 goto init_failed;
1448 mpeg2dec->info = mpeg2_info (mpeg2dec->decoder);
1449 break;
1450 case GST_STATE_CHANGE_READY_TO_PAUSED:
1451 gst_mpeg2dec_reset (mpeg2dec);
1452 break;
1453 case GST_STATE_CHANGE_PAUSED_TO_PLAYING:
1454 default:
1455 break;
1456 }
1458 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
1460 switch (transition) {
1461 case GST_STATE_CHANGE_PLAYING_TO_PAUSED:
1462 break;
1463 case GST_STATE_CHANGE_PAUSED_TO_READY:
1464 break;
1465 case GST_STATE_CHANGE_READY_TO_NULL:
1466 if (mpeg2dec->decoder) {
1467 mpeg2_close (mpeg2dec->decoder);
1468 mpeg2dec->decoder = NULL;
1469 mpeg2dec->info = NULL;
1470 }
1471 break;
1472 default:
1473 break;
1474 }
1475 return ret;
1477 /* ERRORS */
1478 init_failed:
1479 {
1480 GST_ELEMENT_ERROR (mpeg2dec, LIBRARY, INIT,
1481 (NULL), ("Failed to initialize libmpeg2 library"));
1482 return GST_STATE_CHANGE_FAILURE;
1483 }
1484 }
1486 static void
1487 gst_mpeg2dec_set_property (GObject * object, guint prop_id,
1488 const GValue * value, GParamSpec * pspec)
1489 {
1490 GstMpeg2dec *src;
1492 g_return_if_fail (GST_IS_MPEG2DEC (object));
1493 src = GST_MPEG2DEC (object);
1495 switch (prop_id) {
1496 default:
1497 break;
1498 }
1499 }
1501 static void
1502 gst_mpeg2dec_get_property (GObject * object, guint prop_id, GValue * value,
1503 GParamSpec * pspec)
1504 {
1505 GstMpeg2dec *mpeg2dec;
1507 g_return_if_fail (GST_IS_MPEG2DEC (object));
1508 mpeg2dec = GST_MPEG2DEC (object);
1510 switch (prop_id) {
1511 default:
1512 break;
1513 }
1514 }
1516 static gboolean
1517 plugin_init (GstPlugin * plugin)
1518 {
1519 if (!gst_element_register (plugin, "mpeg2dec", GST_RANK_SECONDARY,
1520 GST_TYPE_MPEG2DEC))
1521 return FALSE;
1523 return TRUE;
1524 }
1526 GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
1527 GST_VERSION_MINOR,
1528 "mpeg2dec",
1529 "LibMpeg2 decoder", plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN);