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 = {
75 "Read from arbitrary point in a file",
77 "Erik Walthinsen <omega@cse.ogi.edu>",
81 /* #define fs_print(format,args...) g_print(format, ## args) */
82 #define fs_print(format,args...)
84 /* FileSrc signals and args */
101 static void gst_filesrc_class_init (GstFileSrcClass *klass);
102 static void gst_filesrc_init (GstFileSrc *filesrc);
103 static void gst_filesrc_dispose (GObject *object);
105 static void gst_filesrc_set_property (GObject *object, guint prop_id,
106 const GValue *value, GParamSpec *pspec);
107 static void gst_filesrc_get_property (GObject *object, guint prop_id,
108 GValue *value, GParamSpec *pspec);
110 static GstBuffer * gst_filesrc_get (GstPad *pad);
111 static const GstFormat* gst_filesrc_get_formats (GstPad *pad);
112 static gboolean gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event);
113 static gboolean gst_filesrc_srcpad_query (GstPad *pad, GstPadQueryType type,
114 GstSeekType *format, gint64 *value);
116 static GstElementStateReturn gst_filesrc_change_state (GstElement *element);
119 static GstElementClass *parent_class = NULL;
120 /*static guint gst_filesrc_signals[LAST_SIGNAL] = { 0 };*/
123 gst_filesrc_get_type(void)
125 static GType filesrc_type = 0;
128 static const GTypeInfo filesrc_info = {
129 sizeof(GstFileSrcClass), NULL,
131 (GClassInitFunc)gst_filesrc_class_init,
136 (GInstanceInitFunc)gst_filesrc_init,
138 filesrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFileSrc", &filesrc_info, 0);
144 gst_filesrc_class_init (GstFileSrcClass *klass)
146 GObjectClass *gobject_class;
147 GstElementClass *gstelement_class;
149 gobject_class = (GObjectClass*)klass;
150 gstelement_class = (GstElementClass*)klass;
152 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
154 gst_element_class_install_std_props (
155 GST_ELEMENT_CLASS (klass),
156 "fd", ARG_FD, G_PARAM_READABLE,
157 "offset", ARG_OFFSET, G_PARAM_READWRITE,
158 "filesize", ARG_FILESIZE, G_PARAM_READABLE,
159 "location", ARG_LOCATION, G_PARAM_READWRITE,
160 "blocksize", ARG_BLOCKSIZE, G_PARAM_READWRITE,
161 "mmapsize", ARG_MAPSIZE, G_PARAM_READWRITE,
162 "touch", ARG_TOUCH, G_PARAM_READWRITE,
165 gobject_class->dispose = gst_filesrc_dispose;
166 gobject_class->set_property = gst_filesrc_set_property;
167 gobject_class->get_property = gst_filesrc_get_property;
169 gstelement_class->change_state = gst_filesrc_change_state;
173 gst_filesrc_bufcmp (gconstpointer a, gconstpointer b)
175 /* GstBuffer *bufa = (GstBuffer *)a, *bufb = (GstBuffer *)b;*/
177 /* sort first by offset, then in reverse by size */
178 if (GST_BUFFER_OFFSET(a) < GST_BUFFER_OFFSET(b)) return -1;
179 else if (GST_BUFFER_OFFSET(a) > GST_BUFFER_OFFSET(b)) return 1;
180 else if (GST_BUFFER_SIZE(a) > GST_BUFFER_SIZE(b)) return -1;
181 else if (GST_BUFFER_SIZE(a) < GST_BUFFER_SIZE(b)) return 1;
185 static const GstEventMask*
186 gst_filesrc_get_event_mask (GstPad *pad)
188 static GstEventMask gst_filesrc_event_mask[] = {
189 { GST_EVENT_SEEK, GST_SEEK_METHOD_CUR |
190 GST_SEEK_METHOD_SET |
191 GST_SEEK_METHOD_END |
192 GST_SEEK_FLAG_FLUSH },
193 { GST_EVENT_FLUSH, 0 },
194 { GST_EVENT_SIZE, 0 },
198 return gst_filesrc_event_mask;
201 static const GstPadQueryType*
202 gst_filesrc_get_query_types (GstPad *pad)
204 static GstPadQueryType gst_filesrc_query_types[] = {
206 GST_PAD_QUERY_POSITION,
210 return gst_filesrc_query_types;
214 gst_filesrc_init (GstFileSrc *src)
216 src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
217 gst_pad_set_get_function (src->srcpad, gst_filesrc_get);
218 gst_pad_set_event_function (src->srcpad, gst_filesrc_srcpad_event);
219 gst_pad_set_event_mask_function (src->srcpad, gst_filesrc_get_event_mask);
220 gst_pad_set_query_function (src->srcpad, gst_filesrc_srcpad_query);
221 gst_pad_set_query_type_function (src->srcpad, gst_filesrc_get_query_types);
222 gst_pad_set_formats_function (src->srcpad, gst_filesrc_get_formats);
223 gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
225 src->pagesize = getpagesize();
227 src->filename = NULL;
232 src->block_size = 4096;
236 src->mapsize = 4 * 1024 * 1024; /* default is 4MB */
238 src->map_regions = g_tree_new (gst_filesrc_bufcmp);
239 src->map_regions_lock = g_mutex_new();
241 src->seek_happened = FALSE;
245 gst_filesrc_dispose (GObject *object)
249 src = GST_FILESRC (object);
251 G_OBJECT_CLASS (parent_class)->dispose (object);
253 g_tree_destroy (src->map_regions);
254 g_mutex_free (src->map_regions_lock);
256 g_free (src->filename);
261 gst_filesrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
265 /* it's not null if we got it, but it might not be ours */
266 g_return_if_fail (GST_IS_FILESRC (object));
268 src = GST_FILESRC (object);
272 /* the element must be stopped in order to do this */
273 g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
275 if (src->filename) g_free (src->filename);
276 /* clear the filename if we get a NULL (is that possible?) */
277 if (g_value_get_string (value) == NULL) {
278 gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL);
279 src->filename = NULL;
280 /* otherwise set the new filename */
282 src->filename = g_strdup (g_value_get_string (value));
284 g_object_notify (G_OBJECT (src), "location");
287 src->block_size = g_value_get_ulong (value);
288 g_object_notify (G_OBJECT (src), "blocksize");
291 src->curoffset = g_value_get_int64 (value);
292 g_object_notify (G_OBJECT (src), "offset");
295 if ((src->mapsize % src->pagesize) == 0) {
296 src->mapsize = g_value_get_ulong (value);
297 g_object_notify (G_OBJECT (src), "mmapsize");
299 GST_INFO(0, "invalid mapsize, must a multiple of pagesize, which is %d\n",src->pagesize);
303 src->touch = g_value_get_boolean (value);
304 g_object_notify (G_OBJECT (src), "touch");
312 gst_filesrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
316 /* it's not null if we got it, but it might not be ours */
317 g_return_if_fail (GST_IS_FILESRC (object));
319 src = GST_FILESRC (object);
323 g_value_set_string (value, src->filename);
326 g_value_set_int64 (value, src->filelen);
329 g_value_set_int (value, src->fd);
332 g_value_set_ulong (value, src->block_size);
335 g_value_set_int64 (value, src->curoffset);
338 g_value_set_ulong (value, src->mapsize);
341 g_value_set_boolean (value, src->touch);
344 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
350 gst_filesrc_free_parent_mmap (GstBuffer *buf)
352 GstFileSrc *src = GST_FILESRC(GST_BUFFER_POOL_PRIVATE(buf));
354 fs_print ("freeing mmap()d buffer at %d+%d\n",GST_BUFFER_OFFSET(buf),GST_BUFFER_SIZE(buf));
356 /* remove the buffer from the list of available mmap'd regions */
357 g_mutex_lock(src->map_regions_lock);
358 g_tree_remove(src->map_regions,buf);
359 /* check to see if the tree is empty */
360 if (g_tree_nnodes(src->map_regions) == 0) {
361 /* we have to free the bufferpool we don't have yet */
363 g_mutex_unlock(src->map_regions_lock);
366 /* madvise to tell the kernel what to do with it */
367 madvise(GST_BUFFER_DATA(buf),GST_BUFFER_SIZE(buf),MADV_DONTNEED);
369 /* now unmap the memory */
370 munmap(GST_BUFFER_DATA(buf),GST_BUFFER_MAXSIZE(buf));
372 GST_BUFFER_DATA (buf) = NULL;
374 gst_buffer_default_free (buf);
378 gst_filesrc_map_region (GstFileSrc *src, off_t offset, size_t size)
383 g_return_val_if_fail (offset >= 0, NULL);
385 fs_print ("mapping region %08llx+%08x from file into memory\n",offset,size);
387 /* time to allocate a new mapbuf */
388 buf = gst_buffer_new();
389 /* mmap() the data into this new buffer */
390 GST_BUFFER_DATA(buf) = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
391 if (GST_BUFFER_DATA(buf) == NULL) {
392 gst_element_error (GST_ELEMENT (src), "couldn't map file");
393 } else if (GST_BUFFER_DATA(buf) == MAP_FAILED) {
394 gst_element_error (GST_ELEMENT (src), "mmap (0x%x, %d, 0x%llx) : %s",
395 size, src->fd, offset, strerror (errno));
397 #ifdef MADV_SEQUENTIAL
398 /* madvise to tell the kernel what to do with it */
399 retval = madvise(GST_BUFFER_DATA(buf),GST_BUFFER_SIZE(buf),MADV_SEQUENTIAL);
401 /* fill in the rest of the fields */
402 GST_BUFFER_FLAG_SET(buf, GST_BUFFER_READONLY);
403 GST_BUFFER_FLAG_SET(buf, GST_BUFFER_ORIGINAL);
404 GST_BUFFER_SIZE(buf) = size;
405 GST_BUFFER_MAXSIZE(buf) = size;
406 GST_BUFFER_OFFSET(buf) = offset;
407 GST_BUFFER_TIMESTAMP(buf) = -1LL;
408 GST_BUFFER_POOL_PRIVATE(buf) = src;
409 GST_BUFFER_FREE_FUNC(buf) = (GstDataFreeFunction) gst_filesrc_free_parent_mmap;
411 g_mutex_lock(src->map_regions_lock);
412 g_tree_insert(src->map_regions,buf,buf);
413 g_mutex_unlock(src->map_regions_lock);
419 gst_filesrc_map_small_region (GstFileSrc *src, off_t offset, size_t size)
425 /* printf("attempting to map a small buffer at %d+%d\n",offset,size); */
427 /* if the offset starts at a non-page boundary, we have to special case */
428 if ((mod = offset % src->pagesize)) {
431 mapbase = offset - mod;
432 mapsize = ((size + mod + src->pagesize - 1) / src->pagesize) * src->pagesize;
433 /* printf("not on page boundaries, resizing map to %d+%d\n",mapbase,mapsize);*/
434 map = gst_filesrc_map_region(src, mapbase, mapsize);
435 ret = gst_buffer_create_sub (map, offset - mapbase, size);
437 gst_buffer_unref (map);
442 return gst_filesrc_map_region(src,offset,size);
450 /* This allows us to search for a potential mmap region. */
452 gst_filesrc_search_region_match (gpointer a, gpointer b)
454 GstFileSrcRegion *r = (GstFileSrcRegion *)b;
456 /* trying to walk b down the tree, current node is a */
457 if (r->offset < GST_BUFFER_OFFSET(a)) return -1;
458 else if (r->offset >= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 1;
459 else if ((r->offset + r->size) <= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 0;
466 * @pad: #GstPad to push a buffer from
468 * Push a new buffer from the filesrc at the current offset.
471 gst_filesrc_get (GstPad *pad)
474 GstBuffer *buf = NULL, *map;
476 off_t readend,mapstart,mapend;
477 GstFileSrcRegion region;
480 g_return_val_if_fail (pad != NULL, NULL);
481 src = GST_FILESRC (gst_pad_get_parent (pad));
482 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), NULL);
485 if (src->seek_happened) {
488 src->seek_happened = FALSE;
489 GST_DEBUG (GST_CAT_EVENT, "filesrc sending discont\n");
490 event = gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, src->curoffset, NULL);
491 GST_EVENT_DISCONT_NEW_MEDIA (event) = FALSE;
492 src->need_flush = FALSE;
493 return GST_BUFFER (event);
495 /* check for flush */
496 if (src->need_flush) {
497 src->need_flush = FALSE;
498 GST_DEBUG (GST_CAT_EVENT, "filesrc sending flush\n");
499 return GST_BUFFER (gst_event_new_flush ());
503 if (src->curoffset == src->filelen) {
504 GST_DEBUG (0, "filesrc eos %lld %lld\n", src->curoffset, src->filelen);
505 gst_element_set_eos (GST_ELEMENT (src));
506 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
509 /* calculate end pointers so we don't have to do so repeatedly later */
510 readsize = src->block_size;
511 readend = src->curoffset + src->block_size; /* note this is the byte *after* the read */
512 mapstart = GST_BUFFER_OFFSET(src->mapbuf);
513 mapend = mapstart + GST_BUFFER_SIZE(src->mapbuf); /* note this is the byte *after* the map */
515 /* check to see if we're going to overflow the end of the file */
516 if (readend > src->filelen) {
517 readsize = src->filelen - src->curoffset;
518 readend = src->curoffset + readsize;
521 /* if the start is past the mapstart */
522 if (src->curoffset >= mapstart) {
523 /* if the end is before the mapend, the buffer is in current mmap region... */
524 /* ('cause by definition if readend is in the buffer, so's readstart) */
525 if (readend <= mapend) {
526 fs_print ("read buf %llu+%d lives in current mapbuf %lld+%d, creating subbuffer of mapbuf\n",
527 src->curoffset, readsize, mapstart, GST_BUFFER_SIZE(src->mapbuf));
528 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - GST_BUFFER_OFFSET(src->mapbuf),
531 /* if the start actually is within the current mmap region, map an overlap buffer */
532 } else if (src->curoffset < mapend) {
533 fs_print ("read buf %llu+%d starts in mapbuf %d+%d but ends outside, creating new mmap\n",
534 src->curoffset,readsize,GST_BUFFER_OFFSET(src->mapbuf),GST_BUFFER_SIZE(src->mapbuf));
535 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
538 /* the only other option is that buffer is totally outside, which means we search for it */
540 /* now we can assume that the start is *before* the current mmap region */
541 /* if the readend is past mapstart, we have two options */
542 } else if (readend >= mapstart) {
543 /* either the read buffer overlaps the start of the mmap region */
544 /* or the read buffer fully contains the current mmap region */
545 /* either way, it's really not relevant, we just create a new region anyway*/
546 fs_print ("read buf %llu+%d starts before mapbuf %d+%d, but overlaps it\n",
547 src->curoffset,readsize,GST_BUFFER_OFFSET(src->mapbuf),GST_BUFFER_SIZE(src->mapbuf));
548 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
551 /* then deal with the case where the read buffer is totally outside */
553 /* first check to see if there's a map that covers the right region already */
554 fs_print ("searching for mapbuf to cover %llu+%d\n",src->curoffset,readsize);
555 region.offset = src->curoffset;
556 region.size = readsize;
557 map = g_tree_search (src->map_regions,
558 (GCompareFunc) gst_filesrc_search_region_match,
561 /* if we found an exact match, subbuffer it */
563 fs_print ("found mapbuf at %d+%d, creating subbuffer\n",GST_BUFFER_OFFSET(map),GST_BUFFER_SIZE(map));
564 buf = gst_buffer_create_sub (map, src->curoffset - GST_BUFFER_OFFSET(map), readsize);
566 /* otherwise we need to create something out of thin air */
568 /* if the read buffer crosses a mmap region boundary, create a one-off region */
569 if ((src->curoffset / src->mapsize) != (readend / src->mapsize)) {
570 fs_print ("read buf %llu+%d crosses a %d-byte boundary, creating a one-off\n",
571 src->curoffset,readsize,src->mapsize);
572 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
574 /* otherwise we will create a new mmap region and set it to the default */
578 off_t nextmap = src->curoffset - (src->curoffset % src->mapsize);
579 fs_print ("read buf %llu+%d in new mapbuf at %llu+%d, mapping and subbuffering\n",
580 src->curoffset, readsize, nextmap, src->mapsize);
581 /* first, we're done with the old mapbuf */
582 gst_buffer_unref(src->mapbuf);
583 mapsize = src->mapsize;
585 /* double the mapsize as long as the readsize is smaller */
586 while (readsize - (src->curoffset - nextmap) > mapsize) {
587 fs_print ("readsize smaller then mapsize %08x %d\n", readsize, mapsize);
590 /* create a new one */
591 src->mapbuf = gst_filesrc_map_region (src, nextmap, mapsize);
593 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - nextmap, readsize);
598 /* if we need to touch the buffer (to bring it into memory), do so */
600 volatile guchar *p = GST_BUFFER_DATA (buf), c;
601 for (i=0;i<GST_BUFFER_SIZE(buf);i+=src->pagesize)
605 /* we're done, return the buffer */
606 src->curoffset += GST_BUFFER_SIZE(buf);
607 g_object_notify (G_OBJECT (src), "offset");
611 /* open the file and mmap it, necessary to go to READY state */
613 gst_filesrc_open_file (GstFileSrc *src)
615 g_return_val_if_fail (!GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
617 GST_DEBUG(0, "opening file %s",src->filename);
620 src->fd = open (src->filename, O_RDONLY);
622 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" (%s)",
623 src->filename, strerror (errno), NULL);
626 /* check if it is a regular file, otherwise bail out */
627 struct stat stat_results;
629 fstat(src->fd, &stat_results);
631 if (!S_ISREG(stat_results.st_mode)) {
632 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" failed. it isn't a regular file",
633 src->filename, NULL);
638 /* find the file length */
639 src->filelen = lseek (src->fd, 0, SEEK_END);
640 lseek (src->fd, 0, SEEK_SET);
642 /* allocate the first mmap'd region */
643 src->mapbuf = gst_filesrc_map_region (src, 0, src->mapsize);
647 /* now notify of the changes */
648 g_object_freeze_notify (G_OBJECT (src));
649 g_object_notify (G_OBJECT (src), "filesize");
650 g_object_notify (G_OBJECT (src), "offset");
651 g_object_thaw_notify (G_OBJECT (src));
653 GST_FLAG_SET (src, GST_FILESRC_OPEN);
658 /* unmap and close the file */
660 gst_filesrc_close_file (GstFileSrc *src)
662 g_return_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN));
667 /* zero out a lot of our state */
671 /* and notify that things changed */
672 g_object_freeze_notify (G_OBJECT (src));
673 g_object_notify (G_OBJECT (src), "filesize");
674 g_object_notify (G_OBJECT (src), "offset");
675 g_object_thaw_notify (G_OBJECT (src));
678 gst_buffer_unref (src->mapbuf);
680 GST_FLAG_UNSET (src, GST_FILESRC_OPEN);
684 static GstElementStateReturn
685 gst_filesrc_change_state (GstElement *element)
687 GstFileSrc *src = GST_FILESRC(element);
689 switch (GST_STATE_TRANSITION (element)) {
690 case GST_STATE_NULL_TO_READY:
692 case GST_STATE_READY_TO_NULL:
694 case GST_STATE_READY_TO_PAUSED:
695 if (!GST_FLAG_IS_SET (element, GST_FILESRC_OPEN)) {
696 if (!gst_filesrc_open_file (GST_FILESRC (element)))
697 return GST_STATE_FAILURE;
700 case GST_STATE_PAUSED_TO_READY:
701 if (GST_FLAG_IS_SET (element, GST_FILESRC_OPEN))
702 gst_filesrc_close_file (GST_FILESRC (element));
703 src->seek_happened = TRUE;
709 if (GST_ELEMENT_CLASS (parent_class)->change_state)
710 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
712 return GST_STATE_SUCCESS;
715 static const GstFormat*
716 gst_filesrc_get_formats (GstPad *pad)
718 static const GstFormat gst_filesrc_formats[] = {
723 return gst_filesrc_formats;
727 gst_filesrc_srcpad_query (GstPad *pad, GstPadQueryType type,
728 GstFormat *format, gint64 *value)
730 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
733 case GST_PAD_QUERY_TOTAL:
734 if (*format != GST_FORMAT_BYTES) {
737 *value = src->filelen;
739 case GST_PAD_QUERY_POSITION:
740 if (*format != GST_FORMAT_BYTES) {
743 *value = src->curoffset;
753 gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
755 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
757 GST_DEBUG(0, "event %d", GST_EVENT_TYPE (event));
759 switch (GST_EVENT_TYPE (event)) {
764 if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_BYTES) {
768 offset = GST_EVENT_SEEK_OFFSET (event);
770 switch (GST_EVENT_SEEK_METHOD (event)) {
771 case GST_SEEK_METHOD_SET:
772 if (offset > src->filelen)
774 src->curoffset = offset;
775 GST_DEBUG(0, "seek set pending to %lld", src->curoffset);
777 case GST_SEEK_METHOD_CUR:
778 if (offset + src->curoffset > src->filelen)
780 src->curoffset += offset;
781 GST_DEBUG(0, "seek cur pending to %lld", src->curoffset);
783 case GST_SEEK_METHOD_END:
784 if (ABS (offset) > src->filelen)
786 src->curoffset = src->filelen - ABS (offset);
787 GST_DEBUG(0, "seek end pending to %lld", src->curoffset);
793 g_object_notify (G_OBJECT (src), "offset");
794 src->seek_happened = TRUE;
795 src->need_flush = GST_EVENT_SEEK_FLAGS(event) & GST_SEEK_FLAG_FLUSH;
799 if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
802 src->block_size = GST_EVENT_SIZE_VALUE (event);
803 g_object_notify (G_OBJECT (src), "blocksize");
805 case GST_EVENT_FLUSH:
806 src->need_flush = TRUE;
812 gst_event_unref (event);
816 gst_event_unref (event);