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 #ifdef G_HAVE_ISO_VARARGS
87 /* #define fs_print(...) g_print(__VA_ARGS__) */
90 #elif defined(G_HAVE_GNUC_VARARGS)
92 /* #define fs_print(format,args...) g_print(format, ## args) */
93 #define fs_print(format,args...)
97 /* FileSrc signals and args */
112 GST_PAD_EVENT_MASK_FUNCTION (gst_filesrc_get_event_mask,
113 { GST_EVENT_SEEK, GST_SEEK_METHOD_CUR |
114 GST_SEEK_METHOD_SET |
115 GST_SEEK_METHOD_END |
116 GST_SEEK_FLAG_FLUSH },
117 { GST_EVENT_FLUSH, 0 },
118 { GST_EVENT_SIZE, 0 }
121 GST_PAD_QUERY_TYPE_FUNCTION (gst_filesrc_get_query_types,
126 GST_PAD_FORMATS_FUNCTION (gst_filesrc_get_formats,
130 static void gst_filesrc_class_init (GstFileSrcClass *klass);
131 static void gst_filesrc_init (GstFileSrc *filesrc);
132 static void gst_filesrc_dispose (GObject *object);
134 static void gst_filesrc_set_property (GObject *object, guint prop_id,
135 const GValue *value, GParamSpec *pspec);
136 static void gst_filesrc_get_property (GObject *object, guint prop_id,
137 GValue *value, GParamSpec *pspec);
139 static GstBuffer * gst_filesrc_get (GstPad *pad);
140 static gboolean gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event);
141 static gboolean gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
142 GstFormat *format, gint64 *value);
144 static GstElementStateReturn gst_filesrc_change_state (GstElement *element);
147 static GstElementClass *parent_class = NULL;
148 /*static guint gst_filesrc_signals[LAST_SIGNAL] = { 0 };*/
151 gst_filesrc_get_type(void)
153 static GType filesrc_type = 0;
156 static const GTypeInfo filesrc_info = {
157 sizeof(GstFileSrcClass), NULL,
159 (GClassInitFunc)gst_filesrc_class_init,
164 (GInstanceInitFunc)gst_filesrc_init,
166 filesrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFileSrc", &filesrc_info, 0);
172 gst_filesrc_class_init (GstFileSrcClass *klass)
174 GObjectClass *gobject_class;
175 GstElementClass *gstelement_class;
177 gobject_class = (GObjectClass*)klass;
178 gstelement_class = (GstElementClass*)klass;
180 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
182 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
183 g_param_spec_int ("fd", "File-descriptor", "File-descriptor for the file being mmap()d",
184 0, G_MAXINT, 0, G_PARAM_READABLE));
185 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOCATION,
186 g_param_spec_string ("location", "File Location", "Location of the file to read",
187 NULL, G_PARAM_READWRITE));
188 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
189 g_param_spec_ulong ("blocksize", "Block size", "Size in bytes to read per buffer",
190 1, G_MAXULONG, DEFAULT_BLOCKSIZE, G_PARAM_READWRITE));
191 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MMAPSIZE,
192 g_param_spec_ulong ("mmapsize", "mmap() Block Size",
193 "Size in bytes of mmap()d regions",
194 0, G_MAXULONG, DEFAULT_MMAPSIZE, G_PARAM_READWRITE));
195 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TOUCH,
196 g_param_spec_boolean ("touch", "Touch read data",
197 "Touch data to force disk read",
198 FALSE, G_PARAM_READWRITE));
200 gobject_class->dispose = gst_filesrc_dispose;
201 gobject_class->set_property = gst_filesrc_set_property;
202 gobject_class->get_property = gst_filesrc_get_property;
204 gstelement_class->change_state = gst_filesrc_change_state;
208 gst_filesrc_bufcmp (gconstpointer a, gconstpointer b)
210 /* GstBuffer *bufa = (GstBuffer *)a, *bufb = (GstBuffer *)b;*/
212 /* sort first by offset, then in reverse by size */
213 if (GST_BUFFER_OFFSET(a) < GST_BUFFER_OFFSET(b)) return -1;
214 else if (GST_BUFFER_OFFSET(a) > GST_BUFFER_OFFSET(b)) return 1;
215 else if (GST_BUFFER_SIZE(a) > GST_BUFFER_SIZE(b)) return -1;
216 else if (GST_BUFFER_SIZE(a) < GST_BUFFER_SIZE(b)) return 1;
221 gst_filesrc_init (GstFileSrc *src)
223 src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
224 gst_pad_set_get_function (src->srcpad, gst_filesrc_get);
225 gst_pad_set_event_function (src->srcpad, gst_filesrc_srcpad_event);
226 gst_pad_set_event_mask_function (src->srcpad, gst_filesrc_get_event_mask);
227 gst_pad_set_query_function (src->srcpad, gst_filesrc_srcpad_query);
228 gst_pad_set_query_type_function (src->srcpad, gst_filesrc_get_query_types);
229 gst_pad_set_formats_function (src->srcpad, gst_filesrc_get_formats);
230 gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
232 src->pagesize = getpagesize();
234 src->filename = NULL;
239 src->block_size = DEFAULT_BLOCKSIZE;
243 src->mapsize = DEFAULT_MMAPSIZE; /* default is 4MB */
245 src->map_regions = g_tree_new (gst_filesrc_bufcmp);
246 src->map_regions_lock = g_mutex_new();
248 src->seek_happened = FALSE;
252 gst_filesrc_dispose (GObject *object)
256 src = GST_FILESRC (object);
258 G_OBJECT_CLASS (parent_class)->dispose (object);
260 g_tree_destroy (src->map_regions);
261 g_mutex_free (src->map_regions_lock);
263 g_free (src->filename);
268 gst_filesrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
272 /* it's not null if we got it, but it might not be ours */
273 g_return_if_fail (GST_IS_FILESRC (object));
275 src = GST_FILESRC (object);
279 /* the element must be stopped in order to do this */
280 g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
282 if (src->filename) g_free (src->filename);
283 /* clear the filename if we get a NULL (is that possible?) */
284 if (g_value_get_string (value) == NULL) {
285 gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL);
286 src->filename = NULL;
287 /* otherwise set the new filename */
289 src->filename = g_strdup (g_value_get_string (value));
291 g_object_notify (G_OBJECT (src), "location");
294 src->block_size = g_value_get_ulong (value);
295 g_object_notify (G_OBJECT (src), "blocksize");
298 if ((src->mapsize % src->pagesize) == 0) {
299 src->mapsize = g_value_get_ulong (value);
300 g_object_notify (G_OBJECT (src), "mmapsize");
302 GST_INFO (0, "invalid mapsize, must a multiple of pagesize, which is %d",
307 src->touch = g_value_get_boolean (value);
308 g_object_notify (G_OBJECT (src), "touch");
316 gst_filesrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
320 /* it's not null if we got it, but it might not be ours */
321 g_return_if_fail (GST_IS_FILESRC (object));
323 src = GST_FILESRC (object);
327 g_value_set_string (value, src->filename);
330 g_value_set_int (value, src->fd);
333 g_value_set_ulong (value, src->block_size);
336 g_value_set_ulong (value, src->mapsize);
339 g_value_set_boolean (value, src->touch);
342 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
348 gst_filesrc_free_parent_mmap (GstBuffer *buf)
350 GstFileSrc *src = GST_FILESRC (GST_BUFFER_POOL_PRIVATE (buf));
352 fs_print ("freeing mmap()d buffer at %d+%d\n",
353 GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
355 /* remove the buffer from the list of available mmap'd regions */
356 g_mutex_lock (src->map_regions_lock);
357 g_tree_remove (src->map_regions, buf);
358 /* check to see if the tree is empty */
359 if (g_tree_nnodes (src->map_regions) == 0) {
360 /* we have to free the bufferpool we don't have yet */
362 g_mutex_unlock (src->map_regions_lock);
365 /* madvise to tell the kernel what to do with it */
366 madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_DONTNEED);
368 /* now unmap the memory */
369 munmap (GST_BUFFER_DATA (buf), GST_BUFFER_MAXSIZE (buf));
370 /* cast to unsigned long, since there's no gportable way to print
372 GST_DEBUG (0, "unmapped region %08lx+%08lx at %p",
373 (unsigned long) GST_BUFFER_OFFSET (buf),
374 (unsigned long) GST_BUFFER_MAXSIZE (buf),
375 GST_BUFFER_DATA (buf));
377 GST_BUFFER_DATA (buf) = NULL;
379 gst_buffer_default_free (buf);
383 gst_filesrc_map_region (GstFileSrc *src, off_t offset, size_t size)
389 g_return_val_if_fail (offset >= 0, NULL);
391 fs_print ("mapping region %08llx+%08x from file into memory\n",offset,size);
392 mmapregion = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
394 if (mmapregion == NULL) {
395 gst_element_error (GST_ELEMENT (src), "couldn't map file");
398 else if (mmapregion == MAP_FAILED) {
399 gst_element_error (GST_ELEMENT (src), "mmap (0x%x, %d, 0x%llx) : %s",
400 size, src->fd, offset, strerror (errno));
403 GST_DEBUG (0, "mapped region %08lx+%08lx from file into memory at %p",
404 (unsigned long)offset, (unsigned long)size, mmapregion);
406 /* time to allocate a new mapbuf */
407 buf = gst_buffer_new ();
408 /* mmap() the data into this new buffer */
409 GST_BUFFER_DATA (buf) = mmapregion;
411 #ifdef MADV_SEQUENTIAL
412 /* madvise to tell the kernel what to do with it */
413 retval = madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_SEQUENTIAL);
415 /* fill in the rest of the fields */
416 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_READONLY);
417 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_ORIGINAL);
418 GST_BUFFER_SIZE (buf) = size;
419 GST_BUFFER_MAXSIZE (buf) = size;
420 GST_BUFFER_OFFSET (buf) = offset;
421 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
422 GST_BUFFER_POOL_PRIVATE (buf) = src;
423 GST_BUFFER_FREE_FUNC (buf) = (GstDataFreeFunction) gst_filesrc_free_parent_mmap;
425 g_mutex_lock (src->map_regions_lock);
426 g_tree_insert (src->map_regions,buf,buf);
427 g_mutex_unlock (src->map_regions_lock);
433 gst_filesrc_map_small_region (GstFileSrc *src, off_t offset, size_t size)
439 /* printf("attempting to map a small buffer at %d+%d\n",offset,size); */
441 /* if the offset starts at a non-page boundary, we have to special case */
442 if ((mod = offset % src->pagesize)) {
445 mapbase = offset - mod;
446 mapsize = ((size + mod + src->pagesize - 1) / src->pagesize) * src->pagesize;
447 /* printf("not on page boundaries, resizing map to %d+%d\n",mapbase,mapsize);*/
448 map = gst_filesrc_map_region(src, mapbase, mapsize);
452 ret = gst_buffer_create_sub (map, offset - mapbase, size);
453 GST_BUFFER_OFFSET (ret) = GST_BUFFER_OFFSET (map) + offset - mapbase;
455 gst_buffer_unref (map);
460 return gst_filesrc_map_region(src,offset,size);
468 /* This allows us to search for a potential mmap region. */
470 gst_filesrc_search_region_match (gpointer a, gpointer b)
472 GstFileSrcRegion *r = (GstFileSrcRegion *)b;
474 /* trying to walk b down the tree, current node is a */
475 if (r->offset < GST_BUFFER_OFFSET(a)) return -1;
476 else if (r->offset >= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 1;
477 else if ((r->offset + r->size) <= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 0;
484 * @pad: #GstPad to push a buffer from
486 * Push a new buffer from the filesrc at the current offset.
489 gst_filesrc_get (GstPad *pad)
492 GstBuffer *buf = NULL, *map;
493 size_t readsize, mapsize;
494 off_t readend,mapstart,mapend;
495 GstFileSrcRegion region;
498 g_return_val_if_fail (pad != NULL, NULL);
499 src = GST_FILESRC (gst_pad_get_parent (pad));
500 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), NULL);
503 if (src->seek_happened) {
506 src->seek_happened = FALSE;
507 GST_DEBUG (GST_CAT_EVENT, "filesrc sending discont");
508 event = gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, src->curoffset, NULL);
509 src->need_flush = FALSE;
510 return GST_BUFFER (event);
512 /* check for flush */
513 if (src->need_flush) {
514 src->need_flush = FALSE;
515 GST_DEBUG (GST_CAT_EVENT, "filesrc sending flush");
516 return GST_BUFFER (gst_event_new_flush ());
520 if (src->curoffset == src->filelen) {
521 GST_DEBUG (0, "filesrc eos %" G_GINT64_FORMAT
522 " %" G_GINT64_FORMAT, src->curoffset, src->filelen);
523 gst_element_set_eos (GST_ELEMENT (src));
524 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
527 /* calculate end pointers so we don't have to do so repeatedly later */
528 readsize = src->block_size;
529 readend = src->curoffset + src->block_size; /* note this is the byte *after* the read */
530 mapstart = GST_BUFFER_OFFSET (src->mapbuf);
531 mapsize = GST_BUFFER_SIZE (src->mapbuf);
532 mapend = mapstart + mapsize; /* note this is the byte *after* the map */
534 /* check to see if we're going to overflow the end of the file */
535 if (readend > src->filelen) {
536 readsize = src->filelen - src->curoffset;
537 readend = src->curoffset + readsize;
540 GST_DEBUG (0, "attempting to read %08lx, %08lx, %08lx, %08lx",
541 (unsigned long)readsize, (unsigned long)readend,
542 (unsigned long)mapstart, (unsigned long)mapend);
544 /* if the start is past the mapstart */
545 if (src->curoffset >= mapstart) {
546 /* if the end is before the mapend, the buffer is in current mmap region... */
547 /* ('cause by definition if readend is in the buffer, so's readstart) */
548 if (readend <= mapend) {
549 fs_print ("read buf %llu+%d lives in current mapbuf %lld+%d, creating subbuffer of mapbuf\n",
550 src->curoffset, readsize, mapstart, mapsize);
551 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - mapstart,
553 GST_BUFFER_OFFSET (buf) = src->curoffset;
555 /* if the start actually is within the current mmap region, map an overlap buffer */
556 } else if (src->curoffset < mapend) {
557 fs_print ("read buf %llu+%d starts in mapbuf %d+%d but ends outside, creating new mmap\n",
558 src->curoffset, readsize, mapstart, mapsize);
559 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
564 /* the only other option is that buffer is totally outside, which means we search for it */
566 /* now we can assume that the start is *before* the current mmap region */
567 /* if the readend is past mapstart, we have two options */
568 } else if (readend >= mapstart) {
569 /* either the read buffer overlaps the start of the mmap region */
570 /* or the read buffer fully contains the current mmap region */
571 /* either way, it's really not relevant, we just create a new region anyway*/
572 fs_print ("read buf %llu+%d starts before mapbuf %d+%d, but overlaps it\n",
573 src->curoffset,readsize, mapstart, mapsize);
574 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
579 /* then deal with the case where the read buffer is totally outside */
581 /* first check to see if there's a map that covers the right region already */
582 fs_print ("searching for mapbuf to cover %llu+%d\n",src->curoffset,readsize);
583 region.offset = src->curoffset;
584 region.size = readsize;
585 map = g_tree_search (src->map_regions,
586 (GCompareFunc) gst_filesrc_search_region_match,
589 /* if we found an exact match, subbuffer it */
591 fs_print ("found mapbuf at %d+%d, creating subbuffer\n",GST_BUFFER_OFFSET(map),GST_BUFFER_SIZE(map));
592 buf = gst_buffer_create_sub (map, src->curoffset - GST_BUFFER_OFFSET(map), readsize);
593 GST_BUFFER_OFFSET (buf) = src->curoffset;
595 /* otherwise we need to create something out of thin air */
597 /* if the read buffer crosses a mmap region boundary, create a one-off region */
598 if ((src->curoffset / src->mapsize) != (readend / src->mapsize)) {
599 fs_print ("read buf %llu+%d crosses a %d-byte boundary, creating a one-off\n",
600 src->curoffset,readsize,src->mapsize);
601 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
605 /* otherwise we will create a new mmap region and set it to the default */
609 off_t nextmap = src->curoffset - (src->curoffset % src->mapsize);
610 fs_print ("read buf %llu+%d in new mapbuf at %llu+%d, mapping and subbuffering\n",
611 src->curoffset, readsize, nextmap, src->mapsize);
612 /* first, we're done with the old mapbuf */
613 gst_buffer_unref(src->mapbuf);
614 mapsize = src->mapsize;
616 /* double the mapsize as long as the readsize is smaller */
617 while (readsize - (src->curoffset - nextmap) > mapsize) {
618 fs_print ("readsize smaller then mapsize %08x %d\n", readsize, mapsize);
621 /* create a new one */
622 src->mapbuf = gst_filesrc_map_region (src, nextmap, mapsize);
623 if (src->mapbuf == NULL)
627 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - nextmap, readsize);
628 GST_BUFFER_OFFSET (buf) = mapstart + src->curoffset - nextmap;
633 /* if we need to touch the buffer (to bring it into memory), do so */
635 volatile guchar *p = GST_BUFFER_DATA (buf), c;
637 for (i=0; i < GST_BUFFER_SIZE (buf); i += src->pagesize)
641 /* we're done, return the buffer */
642 src->curoffset += GST_BUFFER_SIZE(buf);
646 /* open the file and mmap it, necessary to go to READY state */
648 gst_filesrc_open_file (GstFileSrc *src)
650 g_return_val_if_fail (!GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
652 GST_DEBUG(0, "opening file %s",src->filename);
655 src->fd = open (src->filename, O_RDONLY);
657 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" (%s)",
658 src->filename, strerror (errno), NULL);
661 /* check if it is a regular file, otherwise bail out */
662 struct stat stat_results;
664 fstat(src->fd, &stat_results);
666 if (!S_ISREG(stat_results.st_mode)) {
667 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" failed. it isn't a regular file",
668 src->filename, NULL);
673 /* find the file length */
674 src->filelen = lseek (src->fd, 0, SEEK_END);
675 lseek (src->fd, 0, SEEK_SET);
677 /* allocate the first mmap'd region */
678 src->mapbuf = gst_filesrc_map_region (src, 0, src->mapsize);
679 if (src->mapbuf == NULL)
684 GST_FLAG_SET (src, GST_FILESRC_OPEN);
689 /* unmap and close the file */
691 gst_filesrc_close_file (GstFileSrc *src)
693 g_return_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN));
698 /* zero out a lot of our state */
704 gst_buffer_unref (src->mapbuf);
708 GST_FLAG_UNSET (src, GST_FILESRC_OPEN);
712 static GstElementStateReturn
713 gst_filesrc_change_state (GstElement *element)
715 GstFileSrc *src = GST_FILESRC(element);
717 switch (GST_STATE_TRANSITION (element)) {
718 case GST_STATE_NULL_TO_READY:
720 case GST_STATE_READY_TO_NULL:
722 case GST_STATE_READY_TO_PAUSED:
723 if (!GST_FLAG_IS_SET (element, GST_FILESRC_OPEN)) {
724 if (!gst_filesrc_open_file (GST_FILESRC (element)))
725 return GST_STATE_FAILURE;
728 case GST_STATE_PAUSED_TO_READY:
729 if (GST_FLAG_IS_SET (element, GST_FILESRC_OPEN))
730 gst_filesrc_close_file (GST_FILESRC (element));
731 src->seek_happened = TRUE;
737 if (GST_ELEMENT_CLASS (parent_class)->change_state)
738 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
740 return GST_STATE_SUCCESS;
744 gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
745 GstFormat *format, gint64 *value)
747 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
750 case GST_QUERY_TOTAL:
751 if (*format != GST_FORMAT_BYTES) {
754 *value = src->filelen;
756 case GST_QUERY_POSITION:
758 case GST_FORMAT_BYTES:
759 *value = src->curoffset;
761 case GST_FORMAT_PERCENT:
762 if (src->filelen == 0)
764 *value = src->curoffset * GST_FORMAT_PERCENT_MAX / src->filelen;
778 gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
780 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
782 GST_DEBUG(0, "event %d", GST_EVENT_TYPE (event));
784 switch (GST_EVENT_TYPE (event)) {
789 if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_BYTES) {
793 offset = GST_EVENT_SEEK_OFFSET (event);
795 switch (GST_EVENT_SEEK_METHOD (event)) {
796 case GST_SEEK_METHOD_SET:
797 if (offset > src->filelen)
799 src->curoffset = offset;
800 GST_DEBUG(0, "seek set pending to %" G_GINT64_FORMAT, src->curoffset);
802 case GST_SEEK_METHOD_CUR:
803 if (offset + src->curoffset > src->filelen)
805 src->curoffset += offset;
806 GST_DEBUG(0, "seek cur pending to %" G_GINT64_FORMAT, src->curoffset);
808 case GST_SEEK_METHOD_END:
809 if (ABS (offset) > src->filelen)
811 src->curoffset = src->filelen - ABS (offset);
812 GST_DEBUG(0, "seek end pending to %" G_GINT64_FORMAT, src->curoffset);
818 src->seek_happened = TRUE;
819 src->need_flush = GST_EVENT_SEEK_FLAGS(event) & GST_SEEK_FLAG_FLUSH;
823 if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
826 src->block_size = GST_EVENT_SIZE_VALUE (event);
827 g_object_notify (G_OBJECT (src), "blocksize");
829 case GST_EVENT_FLUSH:
830 src->need_flush = TRUE;
836 gst_event_unref (event);
840 gst_event_unref (event);