2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
25 #include "gstfilesrc.h"
36 /**********************************************************************
37 * GStreamer Default File Source
40 * This source uses mmap(2) to efficiently load data from a file.
41 * To do this without seriously polluting the applications' memory
42 * space, it must do so in smaller chunks, say 1-4MB at a time.
43 * Buffers are then subdivided from these mmap'd chunks, to directly
44 * make use of the mmap.
46 * To handle refcounting so that the mmap can be freed at the appropriate
47 * time, a buffer will be created for each mmap'd region, and all new
48 * buffers will be sub-buffers of this top-level buffer. As they are
49 * freed, the refcount goes down on the mmap'd buffer and its free()
50 * function is called, which will call munmap(2) on itself.
52 * If a buffer happens to cross the boundaries of an mmap'd region, we
53 * have to decide whether it's more efficient to copy the data into a
54 * new buffer, or mmap() just that buffer. There will have to be a
55 * breakpoint size to determine which will be done. The mmap() size
56 * has a lot to do with this as well, because you end up in double-
57 * jeopardy: the larger the outgoing buffer, the more data to copy when
58 * it overlaps, *and* the more frequently you'll have buffers that *do*
61 * Seeking is another tricky aspect to do efficiently. The initial
62 * implementation of this source won't make use of these features, however.
63 * The issue is that if an application seeks backwards in a file, *and*
64 * that region of the file is covered by an mmap that hasn't been fully
65 * deallocated, we really should re-use it. But keeping track of these
66 * regions is tricky because we have to lock the structure that holds
67 * them. We need to settle on a locking primitive (GMutex seems to be
68 * a really good option...), then we can do that.
72 GstElementDetails gst_filesrc_details = {
76 "Read from arbitrary point in a file",
78 "Erik Walthinsen <omega@cse.ogi.edu>",
82 /* #define fs_print(format,args...) g_print(format, ## args) */
83 #define fs_print(format,args...)
85 /* FileSrc signals and args */
102 GST_EVENT_MASK_FUNCTION (gst_filesrc_get_event_mask,
103 { GST_EVENT_SEEK, GST_SEEK_METHOD_CUR |
104 GST_SEEK_METHOD_SET |
105 GST_SEEK_METHOD_END |
106 GST_SEEK_FLAG_FLUSH },
107 { GST_EVENT_FLUSH, 0 },
108 { GST_EVENT_SIZE, 0 }
111 GST_PAD_QUERY_TYPE_FUNCTION (gst_filesrc_get_query_types,
113 GST_PAD_QUERY_POSITION
116 GST_FORMATS_FUNCTION (gst_filesrc_get_formats,
120 static void gst_filesrc_class_init (GstFileSrcClass *klass);
121 static void gst_filesrc_init (GstFileSrc *filesrc);
122 static void gst_filesrc_dispose (GObject *object);
124 static void gst_filesrc_set_property (GObject *object, guint prop_id,
125 const GValue *value, GParamSpec *pspec);
126 static void gst_filesrc_get_property (GObject *object, guint prop_id,
127 GValue *value, GParamSpec *pspec);
129 static GstBuffer * gst_filesrc_get (GstPad *pad);
130 static gboolean gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event);
131 static gboolean gst_filesrc_srcpad_query (GstPad *pad, GstPadQueryType type,
132 GstFormat *format, gint64 *value);
134 static GstElementStateReturn gst_filesrc_change_state (GstElement *element);
137 static GstElementClass *parent_class = NULL;
138 /*static guint gst_filesrc_signals[LAST_SIGNAL] = { 0 };*/
141 gst_filesrc_get_type(void)
143 static GType filesrc_type = 0;
146 static const GTypeInfo filesrc_info = {
147 sizeof(GstFileSrcClass), NULL,
149 (GClassInitFunc)gst_filesrc_class_init,
154 (GInstanceInitFunc)gst_filesrc_init,
156 filesrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFileSrc", &filesrc_info, 0);
162 gst_filesrc_class_init (GstFileSrcClass *klass)
164 GObjectClass *gobject_class;
165 GstElementClass *gstelement_class;
167 gobject_class = (GObjectClass*)klass;
168 gstelement_class = (GstElementClass*)klass;
170 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
172 gst_element_class_install_std_props (
173 GST_ELEMENT_CLASS (klass),
174 "fd", ARG_FD, G_PARAM_READABLE,
175 "offset", ARG_OFFSET, G_PARAM_READWRITE,
176 "filesize", ARG_FILESIZE, G_PARAM_READABLE,
177 "location", ARG_LOCATION, G_PARAM_READWRITE,
178 "blocksize", ARG_BLOCKSIZE, G_PARAM_READWRITE,
179 "mmapsize", ARG_MAPSIZE, G_PARAM_READWRITE,
180 "touch", ARG_TOUCH, G_PARAM_READWRITE,
183 gobject_class->dispose = gst_filesrc_dispose;
184 gobject_class->set_property = gst_filesrc_set_property;
185 gobject_class->get_property = gst_filesrc_get_property;
187 gstelement_class->change_state = gst_filesrc_change_state;
191 gst_filesrc_bufcmp (gconstpointer a, gconstpointer b)
193 /* GstBuffer *bufa = (GstBuffer *)a, *bufb = (GstBuffer *)b;*/
195 /* sort first by offset, then in reverse by size */
196 if (GST_BUFFER_OFFSET(a) < GST_BUFFER_OFFSET(b)) return -1;
197 else if (GST_BUFFER_OFFSET(a) > GST_BUFFER_OFFSET(b)) return 1;
198 else if (GST_BUFFER_SIZE(a) > GST_BUFFER_SIZE(b)) return -1;
199 else if (GST_BUFFER_SIZE(a) < GST_BUFFER_SIZE(b)) return 1;
204 gst_filesrc_init (GstFileSrc *src)
206 src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
207 gst_pad_set_get_function (src->srcpad, gst_filesrc_get);
208 gst_pad_set_event_function (src->srcpad, gst_filesrc_srcpad_event);
209 gst_pad_set_event_mask_function (src->srcpad, gst_filesrc_get_event_mask);
210 gst_pad_set_query_function (src->srcpad, gst_filesrc_srcpad_query);
211 gst_pad_set_query_type_function (src->srcpad, gst_filesrc_get_query_types);
212 gst_pad_set_formats_function (src->srcpad, gst_filesrc_get_formats);
213 gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
215 src->pagesize = getpagesize();
217 src->filename = NULL;
222 src->block_size = 4096;
226 src->mapsize = 4 * 1024 * 1024; /* default is 4MB */
228 src->map_regions = g_tree_new (gst_filesrc_bufcmp);
229 src->map_regions_lock = g_mutex_new();
231 src->seek_happened = FALSE;
235 gst_filesrc_dispose (GObject *object)
239 src = GST_FILESRC (object);
241 G_OBJECT_CLASS (parent_class)->dispose (object);
243 g_tree_destroy (src->map_regions);
244 g_mutex_free (src->map_regions_lock);
246 g_free (src->filename);
251 gst_filesrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
255 /* it's not null if we got it, but it might not be ours */
256 g_return_if_fail (GST_IS_FILESRC (object));
258 src = GST_FILESRC (object);
262 /* the element must be stopped in order to do this */
263 g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
265 if (src->filename) g_free (src->filename);
266 /* clear the filename if we get a NULL (is that possible?) */
267 if (g_value_get_string (value) == NULL) {
268 gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL);
269 src->filename = NULL;
270 /* otherwise set the new filename */
272 src->filename = g_strdup (g_value_get_string (value));
274 g_object_notify (G_OBJECT (src), "location");
277 src->block_size = g_value_get_ulong (value);
278 g_object_notify (G_OBJECT (src), "blocksize");
281 src->curoffset = g_value_get_int64 (value);
282 g_object_notify (G_OBJECT (src), "offset");
285 if ((src->mapsize % src->pagesize) == 0) {
286 src->mapsize = g_value_get_ulong (value);
287 g_object_notify (G_OBJECT (src), "mmapsize");
289 GST_INFO(0, "invalid mapsize, must a multiple of pagesize, which is %d\n",src->pagesize);
293 src->touch = g_value_get_boolean (value);
294 g_object_notify (G_OBJECT (src), "touch");
302 gst_filesrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
306 /* it's not null if we got it, but it might not be ours */
307 g_return_if_fail (GST_IS_FILESRC (object));
309 src = GST_FILESRC (object);
313 g_value_set_string (value, src->filename);
316 g_value_set_int64 (value, src->filelen);
319 g_value_set_int (value, src->fd);
322 g_value_set_ulong (value, src->block_size);
325 g_value_set_int64 (value, src->curoffset);
328 g_value_set_ulong (value, src->mapsize);
331 g_value_set_boolean (value, src->touch);
334 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
340 gst_filesrc_free_parent_mmap (GstBuffer *buf)
342 GstFileSrc *src = GST_FILESRC(GST_BUFFER_POOL_PRIVATE(buf));
344 fs_print ("freeing mmap()d buffer at %d+%d\n",GST_BUFFER_OFFSET(buf),GST_BUFFER_SIZE(buf));
346 /* remove the buffer from the list of available mmap'd regions */
347 g_mutex_lock(src->map_regions_lock);
348 g_tree_remove(src->map_regions,buf);
349 /* check to see if the tree is empty */
350 if (g_tree_nnodes(src->map_regions) == 0) {
351 /* we have to free the bufferpool we don't have yet */
353 g_mutex_unlock(src->map_regions_lock);
356 /* madvise to tell the kernel what to do with it */
357 madvise(GST_BUFFER_DATA(buf),GST_BUFFER_SIZE(buf),MADV_DONTNEED);
359 /* now unmap the memory */
360 munmap(GST_BUFFER_DATA(buf),GST_BUFFER_MAXSIZE(buf));
362 GST_BUFFER_DATA (buf) = NULL;
364 gst_buffer_default_free (buf);
368 gst_filesrc_map_region (GstFileSrc *src, off_t offset, size_t size)
373 g_return_val_if_fail (offset >= 0, NULL);
375 fs_print ("mapping region %08llx+%08x from file into memory\n",offset,size);
377 /* time to allocate a new mapbuf */
378 buf = gst_buffer_new();
379 /* mmap() the data into this new buffer */
380 GST_BUFFER_DATA(buf) = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
381 if (GST_BUFFER_DATA(buf) == NULL) {
382 gst_element_error (GST_ELEMENT (src), "couldn't map file");
383 } else if (GST_BUFFER_DATA(buf) == MAP_FAILED) {
384 gst_element_error (GST_ELEMENT (src), "mmap (0x%x, %d, 0x%llx) : %s",
385 size, src->fd, offset, strerror (errno));
387 #ifdef MADV_SEQUENTIAL
388 /* madvise to tell the kernel what to do with it */
389 retval = madvise(GST_BUFFER_DATA(buf),GST_BUFFER_SIZE(buf),MADV_SEQUENTIAL);
391 /* fill in the rest of the fields */
392 GST_BUFFER_FLAG_SET(buf, GST_BUFFER_READONLY);
393 GST_BUFFER_FLAG_SET(buf, GST_BUFFER_ORIGINAL);
394 GST_BUFFER_SIZE(buf) = size;
395 GST_BUFFER_MAXSIZE(buf) = size;
396 GST_BUFFER_OFFSET(buf) = offset;
397 GST_BUFFER_TIMESTAMP(buf) = -1LL;
398 GST_BUFFER_POOL_PRIVATE(buf) = src;
399 GST_BUFFER_FREE_FUNC(buf) = (GstDataFreeFunction) gst_filesrc_free_parent_mmap;
401 g_mutex_lock(src->map_regions_lock);
402 g_tree_insert(src->map_regions,buf,buf);
403 g_mutex_unlock(src->map_regions_lock);
409 gst_filesrc_map_small_region (GstFileSrc *src, off_t offset, size_t size)
415 /* printf("attempting to map a small buffer at %d+%d\n",offset,size); */
417 /* if the offset starts at a non-page boundary, we have to special case */
418 if ((mod = offset % src->pagesize)) {
421 mapbase = offset - mod;
422 mapsize = ((size + mod + src->pagesize - 1) / src->pagesize) * src->pagesize;
423 /* printf("not on page boundaries, resizing map to %d+%d\n",mapbase,mapsize);*/
424 map = gst_filesrc_map_region(src, mapbase, mapsize);
425 ret = gst_buffer_create_sub (map, offset - mapbase, size);
427 gst_buffer_unref (map);
432 return gst_filesrc_map_region(src,offset,size);
440 /* This allows us to search for a potential mmap region. */
442 gst_filesrc_search_region_match (gpointer a, gpointer b)
444 GstFileSrcRegion *r = (GstFileSrcRegion *)b;
446 /* trying to walk b down the tree, current node is a */
447 if (r->offset < GST_BUFFER_OFFSET(a)) return -1;
448 else if (r->offset >= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 1;
449 else if ((r->offset + r->size) <= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 0;
456 * @pad: #GstPad to push a buffer from
458 * Push a new buffer from the filesrc at the current offset.
461 gst_filesrc_get (GstPad *pad)
464 GstBuffer *buf = NULL, *map;
466 off_t readend,mapstart,mapend;
467 GstFileSrcRegion region;
470 g_return_val_if_fail (pad != NULL, NULL);
471 src = GST_FILESRC (gst_pad_get_parent (pad));
472 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), NULL);
475 if (src->seek_happened) {
478 src->seek_happened = FALSE;
479 GST_DEBUG (GST_CAT_EVENT, "filesrc sending discont\n");
480 event = gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, src->curoffset, NULL);
481 GST_EVENT_DISCONT_NEW_MEDIA (event) = FALSE;
482 src->need_flush = FALSE;
483 return GST_BUFFER (event);
485 /* check for flush */
486 if (src->need_flush) {
487 src->need_flush = FALSE;
488 GST_DEBUG (GST_CAT_EVENT, "filesrc sending flush\n");
489 return GST_BUFFER (gst_event_new_flush ());
493 if (src->curoffset == src->filelen) {
494 GST_DEBUG (0, "filesrc eos %lld %lld\n", src->curoffset, src->filelen);
495 gst_element_set_eos (GST_ELEMENT (src));
496 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
499 /* calculate end pointers so we don't have to do so repeatedly later */
500 readsize = src->block_size;
501 readend = src->curoffset + src->block_size; /* note this is the byte *after* the read */
502 mapstart = GST_BUFFER_OFFSET(src->mapbuf);
503 mapend = mapstart + GST_BUFFER_SIZE(src->mapbuf); /* note this is the byte *after* the map */
505 /* check to see if we're going to overflow the end of the file */
506 if (readend > src->filelen) {
507 readsize = src->filelen - src->curoffset;
508 readend = src->curoffset + readsize;
511 /* if the start is past the mapstart */
512 if (src->curoffset >= mapstart) {
513 /* if the end is before the mapend, the buffer is in current mmap region... */
514 /* ('cause by definition if readend is in the buffer, so's readstart) */
515 if (readend <= mapend) {
516 fs_print ("read buf %llu+%d lives in current mapbuf %lld+%d, creating subbuffer of mapbuf\n",
517 src->curoffset, readsize, mapstart, GST_BUFFER_SIZE(src->mapbuf));
518 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - GST_BUFFER_OFFSET(src->mapbuf),
521 /* if the start actually is within the current mmap region, map an overlap buffer */
522 } else if (src->curoffset < mapend) {
523 fs_print ("read buf %llu+%d starts in mapbuf %d+%d but ends outside, creating new mmap\n",
524 src->curoffset,readsize,GST_BUFFER_OFFSET(src->mapbuf),GST_BUFFER_SIZE(src->mapbuf));
525 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
528 /* the only other option is that buffer is totally outside, which means we search for it */
530 /* now we can assume that the start is *before* the current mmap region */
531 /* if the readend is past mapstart, we have two options */
532 } else if (readend >= mapstart) {
533 /* either the read buffer overlaps the start of the mmap region */
534 /* or the read buffer fully contains the current mmap region */
535 /* either way, it's really not relevant, we just create a new region anyway*/
536 fs_print ("read buf %llu+%d starts before mapbuf %d+%d, but overlaps it\n",
537 src->curoffset,readsize,GST_BUFFER_OFFSET(src->mapbuf),GST_BUFFER_SIZE(src->mapbuf));
538 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
541 /* then deal with the case where the read buffer is totally outside */
543 /* first check to see if there's a map that covers the right region already */
544 fs_print ("searching for mapbuf to cover %llu+%d\n",src->curoffset,readsize);
545 region.offset = src->curoffset;
546 region.size = readsize;
547 map = g_tree_search (src->map_regions,
548 (GCompareFunc) gst_filesrc_search_region_match,
551 /* if we found an exact match, subbuffer it */
553 fs_print ("found mapbuf at %d+%d, creating subbuffer\n",GST_BUFFER_OFFSET(map),GST_BUFFER_SIZE(map));
554 buf = gst_buffer_create_sub (map, src->curoffset - GST_BUFFER_OFFSET(map), readsize);
556 /* otherwise we need to create something out of thin air */
558 /* if the read buffer crosses a mmap region boundary, create a one-off region */
559 if ((src->curoffset / src->mapsize) != (readend / src->mapsize)) {
560 fs_print ("read buf %llu+%d crosses a %d-byte boundary, creating a one-off\n",
561 src->curoffset,readsize,src->mapsize);
562 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
564 /* otherwise we will create a new mmap region and set it to the default */
568 off_t nextmap = src->curoffset - (src->curoffset % src->mapsize);
569 fs_print ("read buf %llu+%d in new mapbuf at %llu+%d, mapping and subbuffering\n",
570 src->curoffset, readsize, nextmap, src->mapsize);
571 /* first, we're done with the old mapbuf */
572 gst_buffer_unref(src->mapbuf);
573 mapsize = src->mapsize;
575 /* double the mapsize as long as the readsize is smaller */
576 while (readsize - (src->curoffset - nextmap) > mapsize) {
577 fs_print ("readsize smaller then mapsize %08x %d\n", readsize, mapsize);
580 /* create a new one */
581 src->mapbuf = gst_filesrc_map_region (src, nextmap, mapsize);
583 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - nextmap, readsize);
588 /* if we need to touch the buffer (to bring it into memory), do so */
590 volatile guchar *p = GST_BUFFER_DATA (buf), c;
591 for (i=0;i<GST_BUFFER_SIZE(buf);i+=src->pagesize)
595 /* we're done, return the buffer */
596 src->curoffset += GST_BUFFER_SIZE(buf);
597 g_object_notify (G_OBJECT (src), "offset");
601 /* open the file and mmap it, necessary to go to READY state */
603 gst_filesrc_open_file (GstFileSrc *src)
605 g_return_val_if_fail (!GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
607 GST_DEBUG(0, "opening file %s",src->filename);
610 src->fd = open (src->filename, O_RDONLY);
612 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" (%s)",
613 src->filename, strerror (errno), NULL);
616 /* check if it is a regular file, otherwise bail out */
617 struct stat stat_results;
619 fstat(src->fd, &stat_results);
621 if (!S_ISREG(stat_results.st_mode)) {
622 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" failed. it isn't a regular file",
623 src->filename, NULL);
628 /* find the file length */
629 src->filelen = lseek (src->fd, 0, SEEK_END);
630 lseek (src->fd, 0, SEEK_SET);
632 /* allocate the first mmap'd region */
633 src->mapbuf = gst_filesrc_map_region (src, 0, src->mapsize);
637 /* now notify of the changes */
638 g_object_freeze_notify (G_OBJECT (src));
639 g_object_notify (G_OBJECT (src), "filesize");
640 g_object_notify (G_OBJECT (src), "offset");
641 g_object_thaw_notify (G_OBJECT (src));
643 GST_FLAG_SET (src, GST_FILESRC_OPEN);
648 /* unmap and close the file */
650 gst_filesrc_close_file (GstFileSrc *src)
652 g_return_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN));
657 /* zero out a lot of our state */
661 /* and notify that things changed */
662 g_object_freeze_notify (G_OBJECT (src));
663 g_object_notify (G_OBJECT (src), "filesize");
664 g_object_notify (G_OBJECT (src), "offset");
665 g_object_thaw_notify (G_OBJECT (src));
668 gst_buffer_unref (src->mapbuf);
670 GST_FLAG_UNSET (src, GST_FILESRC_OPEN);
674 static GstElementStateReturn
675 gst_filesrc_change_state (GstElement *element)
677 GstFileSrc *src = GST_FILESRC(element);
679 switch (GST_STATE_TRANSITION (element)) {
680 case GST_STATE_NULL_TO_READY:
682 case GST_STATE_READY_TO_NULL:
684 case GST_STATE_READY_TO_PAUSED:
685 if (!GST_FLAG_IS_SET (element, GST_FILESRC_OPEN)) {
686 if (!gst_filesrc_open_file (GST_FILESRC (element)))
687 return GST_STATE_FAILURE;
690 case GST_STATE_PAUSED_TO_READY:
691 if (GST_FLAG_IS_SET (element, GST_FILESRC_OPEN))
692 gst_filesrc_close_file (GST_FILESRC (element));
693 src->seek_happened = TRUE;
699 if (GST_ELEMENT_CLASS (parent_class)->change_state)
700 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
702 return GST_STATE_SUCCESS;
706 gst_filesrc_srcpad_query (GstPad *pad, GstPadQueryType type,
707 GstFormat *format, gint64 *value)
709 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
712 case GST_PAD_QUERY_TOTAL:
713 if (*format != GST_FORMAT_BYTES) {
716 *value = src->filelen;
718 case GST_PAD_QUERY_POSITION:
719 if (*format != GST_FORMAT_BYTES) {
722 *value = src->curoffset;
732 gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
734 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
736 GST_DEBUG(0, "event %d", GST_EVENT_TYPE (event));
738 switch (GST_EVENT_TYPE (event)) {
743 if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_BYTES) {
747 offset = GST_EVENT_SEEK_OFFSET (event);
749 switch (GST_EVENT_SEEK_METHOD (event)) {
750 case GST_SEEK_METHOD_SET:
751 if (offset > src->filelen)
753 src->curoffset = offset;
754 GST_DEBUG(0, "seek set pending to %lld", src->curoffset);
756 case GST_SEEK_METHOD_CUR:
757 if (offset + src->curoffset > src->filelen)
759 src->curoffset += offset;
760 GST_DEBUG(0, "seek cur pending to %lld", src->curoffset);
762 case GST_SEEK_METHOD_END:
763 if (ABS (offset) > src->filelen)
765 src->curoffset = src->filelen - ABS (offset);
766 GST_DEBUG(0, "seek end pending to %lld", src->curoffset);
772 g_object_notify (G_OBJECT (src), "offset");
773 src->seek_happened = TRUE;
774 src->need_flush = GST_EVENT_SEEK_FLAGS(event) & GST_SEEK_FLAG_FLUSH;
778 if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
781 src->block_size = GST_EVENT_SIZE_VALUE (event);
782 g_object_notify (G_OBJECT (src), "blocksize");
784 case GST_EVENT_FLUSH:
785 src->need_flush = TRUE;
791 gst_event_unref (event);
795 gst_event_unref (event);