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 DEFAULT_BLOCKSIZE 4*1024
83 #define DEFAULT_MMAPSIZE 4*1024*1024
85 /* #define fs_print(format,args...) g_print(format, ## args) */
86 #define fs_print(format,args...)
88 /* FileSrc signals and args */
103 GST_EVENT_MASK_FUNCTION (gst_filesrc_get_event_mask,
104 { GST_EVENT_SEEK, GST_SEEK_METHOD_CUR |
105 GST_SEEK_METHOD_SET |
106 GST_SEEK_METHOD_END |
107 GST_SEEK_FLAG_FLUSH },
108 { GST_EVENT_FLUSH, 0 },
109 { GST_EVENT_SIZE, 0 }
112 GST_PAD_QUERY_TYPE_FUNCTION (gst_filesrc_get_query_types,
114 GST_PAD_QUERY_POSITION
117 GST_FORMATS_FUNCTION (gst_filesrc_get_formats,
121 static void gst_filesrc_class_init (GstFileSrcClass *klass);
122 static void gst_filesrc_init (GstFileSrc *filesrc);
123 static void gst_filesrc_dispose (GObject *object);
125 static void gst_filesrc_set_property (GObject *object, guint prop_id,
126 const GValue *value, GParamSpec *pspec);
127 static void gst_filesrc_get_property (GObject *object, guint prop_id,
128 GValue *value, GParamSpec *pspec);
130 static GstBuffer * gst_filesrc_get (GstPad *pad);
131 static gboolean gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event);
132 static gboolean gst_filesrc_srcpad_query (GstPad *pad, GstPadQueryType type,
133 GstFormat *format, gint64 *value);
135 static GstElementStateReturn gst_filesrc_change_state (GstElement *element);
138 static GstElementClass *parent_class = NULL;
139 /*static guint gst_filesrc_signals[LAST_SIGNAL] = { 0 };*/
142 gst_filesrc_get_type(void)
144 static GType filesrc_type = 0;
147 static const GTypeInfo filesrc_info = {
148 sizeof(GstFileSrcClass), NULL,
150 (GClassInitFunc)gst_filesrc_class_init,
155 (GInstanceInitFunc)gst_filesrc_init,
157 filesrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFileSrc", &filesrc_info, 0);
163 gst_filesrc_class_init (GstFileSrcClass *klass)
165 GObjectClass *gobject_class;
166 GstElementClass *gstelement_class;
168 gobject_class = (GObjectClass*)klass;
169 gstelement_class = (GstElementClass*)klass;
171 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
173 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
174 g_param_spec_int ("fd", "File-descriptor", "File-descriptor for the file being mmap()d",
175 0, G_MAXINT, 0, G_PARAM_READABLE));
176 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOCATION,
177 g_param_spec_string ("location", "File Location", "Location of the file to read",
178 NULL, G_PARAM_READWRITE));
179 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
180 g_param_spec_ulong ("blocksize", "Block size", "Size in bytes to read per buffer",
181 1, G_MAXULONG, DEFAULT_BLOCKSIZE, G_PARAM_READWRITE));
182 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MMAPSIZE,
183 g_param_spec_ulong ("mmapsize", "mmap() Block Size",
184 "Size in bytes of mmap()d regions",
185 0, G_MAXULONG, DEFAULT_MMAPSIZE, G_PARAM_READWRITE));
186 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TOUCH,
187 g_param_spec_boolean ("touch", "Touch read data",
188 "Touch data to force disk read",
189 FALSE, G_PARAM_READWRITE));
191 gobject_class->dispose = gst_filesrc_dispose;
192 gobject_class->set_property = gst_filesrc_set_property;
193 gobject_class->get_property = gst_filesrc_get_property;
195 gstelement_class->change_state = gst_filesrc_change_state;
199 gst_filesrc_bufcmp (gconstpointer a, gconstpointer b)
201 /* GstBuffer *bufa = (GstBuffer *)a, *bufb = (GstBuffer *)b;*/
203 /* sort first by offset, then in reverse by size */
204 if (GST_BUFFER_OFFSET(a) < GST_BUFFER_OFFSET(b)) return -1;
205 else if (GST_BUFFER_OFFSET(a) > GST_BUFFER_OFFSET(b)) return 1;
206 else if (GST_BUFFER_SIZE(a) > GST_BUFFER_SIZE(b)) return -1;
207 else if (GST_BUFFER_SIZE(a) < GST_BUFFER_SIZE(b)) return 1;
212 gst_filesrc_init (GstFileSrc *src)
214 src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
215 gst_pad_set_get_function (src->srcpad, gst_filesrc_get);
216 gst_pad_set_event_function (src->srcpad, gst_filesrc_srcpad_event);
217 gst_pad_set_event_mask_function (src->srcpad, gst_filesrc_get_event_mask);
218 gst_pad_set_query_function (src->srcpad, gst_filesrc_srcpad_query);
219 gst_pad_set_query_type_function (src->srcpad, gst_filesrc_get_query_types);
220 gst_pad_set_formats_function (src->srcpad, gst_filesrc_get_formats);
221 gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
223 src->pagesize = getpagesize();
225 src->filename = NULL;
230 src->block_size = DEFAULT_BLOCKSIZE;
234 src->mapsize = DEFAULT_MMAPSIZE; /* default is 4MB */
236 src->map_regions = g_tree_new (gst_filesrc_bufcmp);
237 src->map_regions_lock = g_mutex_new();
239 src->seek_happened = FALSE;
243 gst_filesrc_dispose (GObject *object)
247 src = GST_FILESRC (object);
249 G_OBJECT_CLASS (parent_class)->dispose (object);
251 g_tree_destroy (src->map_regions);
252 g_mutex_free (src->map_regions_lock);
254 g_free (src->filename);
259 gst_filesrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
263 /* it's not null if we got it, but it might not be ours */
264 g_return_if_fail (GST_IS_FILESRC (object));
266 src = GST_FILESRC (object);
270 /* the element must be stopped in order to do this */
271 g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
273 if (src->filename) g_free (src->filename);
274 /* clear the filename if we get a NULL (is that possible?) */
275 if (g_value_get_string (value) == NULL) {
276 gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL);
277 src->filename = NULL;
278 /* otherwise set the new filename */
280 src->filename = g_strdup (g_value_get_string (value));
282 g_object_notify (G_OBJECT (src), "location");
285 src->block_size = g_value_get_ulong (value);
286 g_object_notify (G_OBJECT (src), "blocksize");
289 if ((src->mapsize % src->pagesize) == 0) {
290 src->mapsize = g_value_get_ulong (value);
291 g_object_notify (G_OBJECT (src), "mmapsize");
293 GST_INFO (0, "invalid mapsize, must a multiple of pagesize, which is %d\n",
298 src->touch = g_value_get_boolean (value);
299 g_object_notify (G_OBJECT (src), "touch");
307 gst_filesrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
311 /* it's not null if we got it, but it might not be ours */
312 g_return_if_fail (GST_IS_FILESRC (object));
314 src = GST_FILESRC (object);
318 g_value_set_string (value, src->filename);
321 g_value_set_int (value, src->fd);
324 g_value_set_ulong (value, src->block_size);
327 g_value_set_ulong (value, src->mapsize);
330 g_value_set_boolean (value, src->touch);
333 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
339 gst_filesrc_free_parent_mmap (GstBuffer *buf)
341 GstFileSrc *src = GST_FILESRC (GST_BUFFER_POOL_PRIVATE (buf));
343 fs_print ("freeing mmap()d buffer at %d+%d\n",
344 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));
361 GST_DEBUG (0, "unmapped region %08llx+%08llx at %p\n",
362 GST_BUFFER_OFFSET (buf), GST_BUFFER_MAXSIZE (buf),
363 GST_BUFFER_DATA (buf));
365 GST_BUFFER_DATA (buf) = NULL;
367 gst_buffer_default_free (buf);
371 gst_filesrc_map_region (GstFileSrc *src, off_t offset, size_t size)
377 g_return_val_if_fail (offset >= 0, NULL);
379 fs_print ("mapping region %08llx+%08x from file into memory\n",offset,size);
380 mmapregion = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
382 if (mmapregion == NULL) {
383 gst_element_error (GST_ELEMENT (src), "couldn't map file");
386 else if (mmapregion == MAP_FAILED) {
387 gst_element_error (GST_ELEMENT (src), "mmap (0x%x, %d, 0x%llx) : %s",
388 size, src->fd, offset, strerror (errno));
391 GST_DEBUG (0, "mapped region %08llx+%08x from file into memory at %p\n",
392 offset, size, mmapregion);
394 /* time to allocate a new mapbuf */
395 buf = gst_buffer_new ();
396 /* mmap() the data into this new buffer */
397 GST_BUFFER_DATA (buf) = mmapregion;
399 #ifdef MADV_SEQUENTIAL
400 /* madvise to tell the kernel what to do with it */
401 retval = madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_SEQUENTIAL);
403 /* fill in the rest of the fields */
404 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_READONLY);
405 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_ORIGINAL);
406 GST_BUFFER_SIZE (buf) = size;
407 GST_BUFFER_MAXSIZE (buf) = size;
408 GST_BUFFER_OFFSET (buf) = offset;
409 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
410 GST_BUFFER_POOL_PRIVATE (buf) = src;
411 GST_BUFFER_FREE_FUNC (buf) = (GstDataFreeFunction) gst_filesrc_free_parent_mmap;
413 g_mutex_lock (src->map_regions_lock);
414 g_tree_insert (src->map_regions,buf,buf);
415 g_mutex_unlock (src->map_regions_lock);
421 gst_filesrc_map_small_region (GstFileSrc *src, off_t offset, size_t size)
427 /* printf("attempting to map a small buffer at %d+%d\n",offset,size); */
429 /* if the offset starts at a non-page boundary, we have to special case */
430 if ((mod = offset % src->pagesize)) {
433 mapbase = offset - mod;
434 mapsize = ((size + mod + src->pagesize - 1) / src->pagesize) * src->pagesize;
435 /* printf("not on page boundaries, resizing map to %d+%d\n",mapbase,mapsize);*/
436 map = gst_filesrc_map_region(src, mapbase, mapsize);
440 ret = gst_buffer_create_sub (map, offset - mapbase, size);
442 gst_buffer_unref (map);
447 return gst_filesrc_map_region(src,offset,size);
455 /* This allows us to search for a potential mmap region. */
457 gst_filesrc_search_region_match (gpointer a, gpointer b)
459 GstFileSrcRegion *r = (GstFileSrcRegion *)b;
461 /* trying to walk b down the tree, current node is a */
462 if (r->offset < GST_BUFFER_OFFSET(a)) return -1;
463 else if (r->offset >= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 1;
464 else if ((r->offset + r->size) <= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 0;
471 * @pad: #GstPad to push a buffer from
473 * Push a new buffer from the filesrc at the current offset.
476 gst_filesrc_get (GstPad *pad)
479 GstBuffer *buf = NULL, *map;
481 off_t readend,mapstart,mapend;
482 GstFileSrcRegion region;
485 g_return_val_if_fail (pad != NULL, NULL);
486 src = GST_FILESRC (gst_pad_get_parent (pad));
487 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), NULL);
490 if (src->seek_happened) {
493 src->seek_happened = FALSE;
494 GST_DEBUG (GST_CAT_EVENT, "filesrc sending discont\n");
495 event = gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, src->curoffset, NULL);
496 GST_EVENT_DISCONT_NEW_MEDIA (event) = FALSE;
497 src->need_flush = FALSE;
498 return GST_BUFFER (event);
500 /* check for flush */
501 if (src->need_flush) {
502 src->need_flush = FALSE;
503 GST_DEBUG (GST_CAT_EVENT, "filesrc sending flush\n");
504 return GST_BUFFER (gst_event_new_flush ());
508 if (src->curoffset == src->filelen) {
509 GST_DEBUG (0, "filesrc eos %lld %lld\n", src->curoffset, src->filelen);
510 gst_element_set_eos (GST_ELEMENT (src));
511 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
514 /* calculate end pointers so we don't have to do so repeatedly later */
515 readsize = src->block_size;
516 readend = src->curoffset + src->block_size; /* note this is the byte *after* the read */
517 mapstart = GST_BUFFER_OFFSET(src->mapbuf);
518 mapend = mapstart + GST_BUFFER_SIZE(src->mapbuf); /* note this is the byte *after* the map */
520 /* check to see if we're going to overflow the end of the file */
521 if (readend > src->filelen) {
522 readsize = src->filelen - src->curoffset;
523 readend = src->curoffset + readsize;
526 GST_DEBUG (0, "attempting to read %08x, %08llx, %08llx, %08llx",
527 readsize, readend, mapstart, mapend);
529 /* if the start is past the mapstart */
530 if (src->curoffset >= mapstart) {
531 /* if the end is before the mapend, the buffer is in current mmap region... */
532 /* ('cause by definition if readend is in the buffer, so's readstart) */
533 if (readend <= mapend) {
534 fs_print ("read buf %llu+%d lives in current mapbuf %lld+%d, creating subbuffer of mapbuf\n",
535 src->curoffset, readsize, mapstart, GST_BUFFER_SIZE(src->mapbuf));
536 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - GST_BUFFER_OFFSET(src->mapbuf),
539 /* if the start actually is within the current mmap region, map an overlap buffer */
540 } else if (src->curoffset < mapend) {
541 fs_print ("read buf %llu+%d starts in mapbuf %d+%d but ends outside, creating new mmap\n",
542 src->curoffset,readsize,GST_BUFFER_OFFSET(src->mapbuf),GST_BUFFER_SIZE(src->mapbuf));
543 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
548 /* the only other option is that buffer is totally outside, which means we search for it */
550 /* now we can assume that the start is *before* the current mmap region */
551 /* if the readend is past mapstart, we have two options */
552 } else if (readend >= mapstart) {
553 /* either the read buffer overlaps the start of the mmap region */
554 /* or the read buffer fully contains the current mmap region */
555 /* either way, it's really not relevant, we just create a new region anyway*/
556 fs_print ("read buf %llu+%d starts before mapbuf %d+%d, but overlaps it\n",
557 src->curoffset,readsize,GST_BUFFER_OFFSET(src->mapbuf),GST_BUFFER_SIZE(src->mapbuf));
558 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
563 /* then deal with the case where the read buffer is totally outside */
565 /* first check to see if there's a map that covers the right region already */
566 fs_print ("searching for mapbuf to cover %llu+%d\n",src->curoffset,readsize);
567 region.offset = src->curoffset;
568 region.size = readsize;
569 map = g_tree_search (src->map_regions,
570 (GCompareFunc) gst_filesrc_search_region_match,
573 /* if we found an exact match, subbuffer it */
575 fs_print ("found mapbuf at %d+%d, creating subbuffer\n",GST_BUFFER_OFFSET(map),GST_BUFFER_SIZE(map));
576 buf = gst_buffer_create_sub (map, src->curoffset - GST_BUFFER_OFFSET(map), readsize);
578 /* otherwise we need to create something out of thin air */
580 /* if the read buffer crosses a mmap region boundary, create a one-off region */
581 if ((src->curoffset / src->mapsize) != (readend / src->mapsize)) {
582 fs_print ("read buf %llu+%d crosses a %d-byte boundary, creating a one-off\n",
583 src->curoffset,readsize,src->mapsize);
584 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
588 /* otherwise we will create a new mmap region and set it to the default */
592 off_t nextmap = src->curoffset - (src->curoffset % src->mapsize);
593 fs_print ("read buf %llu+%d in new mapbuf at %llu+%d, mapping and subbuffering\n",
594 src->curoffset, readsize, nextmap, src->mapsize);
595 /* first, we're done with the old mapbuf */
596 gst_buffer_unref(src->mapbuf);
597 mapsize = src->mapsize;
599 /* double the mapsize as long as the readsize is smaller */
600 while (readsize - (src->curoffset - nextmap) > mapsize) {
601 fs_print ("readsize smaller then mapsize %08x %d\n", readsize, mapsize);
604 /* create a new one */
605 src->mapbuf = gst_filesrc_map_region (src, nextmap, mapsize);
606 if (src->mapbuf == NULL)
610 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - nextmap, readsize);
615 /* if we need to touch the buffer (to bring it into memory), do so */
617 volatile guchar *p = GST_BUFFER_DATA (buf), c;
619 for (i=0; i < GST_BUFFER_SIZE (buf); i += src->pagesize)
623 /* we're done, return the buffer */
624 src->curoffset += GST_BUFFER_SIZE(buf);
628 /* open the file and mmap it, necessary to go to READY state */
630 gst_filesrc_open_file (GstFileSrc *src)
632 g_return_val_if_fail (!GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
634 GST_DEBUG(0, "opening file %s",src->filename);
637 src->fd = open (src->filename, O_RDONLY);
639 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" (%s)",
640 src->filename, strerror (errno), NULL);
643 /* check if it is a regular file, otherwise bail out */
644 struct stat stat_results;
646 fstat(src->fd, &stat_results);
648 if (!S_ISREG(stat_results.st_mode)) {
649 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" failed. it isn't a regular file",
650 src->filename, NULL);
655 /* find the file length */
656 src->filelen = lseek (src->fd, 0, SEEK_END);
657 lseek (src->fd, 0, SEEK_SET);
659 /* allocate the first mmap'd region */
660 src->mapbuf = gst_filesrc_map_region (src, 0, src->mapsize);
661 if (src->mapbuf == NULL)
666 GST_FLAG_SET (src, GST_FILESRC_OPEN);
671 /* unmap and close the file */
673 gst_filesrc_close_file (GstFileSrc *src)
675 g_return_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN));
680 /* zero out a lot of our state */
686 gst_buffer_unref (src->mapbuf);
690 GST_FLAG_UNSET (src, GST_FILESRC_OPEN);
694 static GstElementStateReturn
695 gst_filesrc_change_state (GstElement *element)
697 GstFileSrc *src = GST_FILESRC(element);
699 switch (GST_STATE_TRANSITION (element)) {
700 case GST_STATE_NULL_TO_READY:
702 case GST_STATE_READY_TO_NULL:
704 case GST_STATE_READY_TO_PAUSED:
705 if (!GST_FLAG_IS_SET (element, GST_FILESRC_OPEN)) {
706 if (!gst_filesrc_open_file (GST_FILESRC (element)))
707 return GST_STATE_FAILURE;
710 case GST_STATE_PAUSED_TO_READY:
711 if (GST_FLAG_IS_SET (element, GST_FILESRC_OPEN))
712 gst_filesrc_close_file (GST_FILESRC (element));
713 src->seek_happened = TRUE;
719 if (GST_ELEMENT_CLASS (parent_class)->change_state)
720 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
722 return GST_STATE_SUCCESS;
726 gst_filesrc_srcpad_query (GstPad *pad, GstPadQueryType type,
727 GstFormat *format, gint64 *value)
729 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
732 case GST_PAD_QUERY_TOTAL:
733 if (*format != GST_FORMAT_BYTES) {
736 *value = src->filelen;
738 case GST_PAD_QUERY_POSITION:
739 if (*format != GST_FORMAT_BYTES) {
742 *value = src->curoffset;
752 gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
754 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
756 GST_DEBUG(0, "event %d", GST_EVENT_TYPE (event));
758 switch (GST_EVENT_TYPE (event)) {
763 if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_BYTES) {
767 offset = GST_EVENT_SEEK_OFFSET (event);
769 switch (GST_EVENT_SEEK_METHOD (event)) {
770 case GST_SEEK_METHOD_SET:
771 if (offset > src->filelen)
773 src->curoffset = offset;
774 GST_DEBUG(0, "seek set pending to %lld", src->curoffset);
776 case GST_SEEK_METHOD_CUR:
777 if (offset + src->curoffset > src->filelen)
779 src->curoffset += offset;
780 GST_DEBUG(0, "seek cur pending to %lld", src->curoffset);
782 case GST_SEEK_METHOD_END:
783 if (ABS (offset) > src->filelen)
785 src->curoffset = src->filelen - ABS (offset);
786 GST_DEBUG(0, "seek end pending to %lld", src->curoffset);
792 src->seek_happened = TRUE;
793 src->need_flush = GST_EVENT_SEEK_FLAGS(event) & GST_SEEK_FLAG_FLUSH;
797 if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
800 src->block_size = GST_EVENT_SIZE_VALUE (event);
801 g_object_notify (G_OBJECT (src), "blocksize");
803 case GST_EVENT_FLUSH:
804 src->need_flush = TRUE;
810 gst_event_unref (event);
814 gst_event_unref (event);