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.
28 #include "gstfilesrc.h"
40 #include "../gst-i18n-lib.h"
43 /**********************************************************************
44 * GStreamer Default File Source
47 * This source uses mmap(2) to efficiently load data from a file.
48 * To do this without seriously polluting the applications' memory
49 * space, it must do so in smaller chunks, say 1-4MB at a time.
50 * Buffers are then subdivided from these mmap'd chunks, to directly
51 * make use of the mmap.
53 * To handle refcounting so that the mmap can be freed at the appropriate
54 * time, a buffer will be created for each mmap'd region, and all new
55 * buffers will be sub-buffers of this top-level buffer. As they are
56 * freed, the refcount goes down on the mmap'd buffer and its free()
57 * function is called, which will call munmap(2) on itself.
59 * If a buffer happens to cross the boundaries of an mmap'd region, we
60 * have to decide whether it's more efficient to copy the data into a
61 * new buffer, or mmap() just that buffer. There will have to be a
62 * breakpoint size to determine which will be done. The mmap() size
63 * has a lot to do with this as well, because you end up in double-
64 * jeopardy: the larger the outgoing buffer, the more data to copy when
65 * it overlaps, *and* the more frequently you'll have buffers that *do*
68 * Seeking is another tricky aspect to do efficiently. The initial
69 * implementation of this source won't make use of these features, however.
70 * The issue is that if an application seeks backwards in a file, *and*
71 * that region of the file is covered by an mmap that hasn't been fully
72 * deallocated, we really should re-use it. But keeping track of these
73 * regions is tricky because we have to lock the structure that holds
74 * them. We need to settle on a locking primitive (GMutex seems to be
75 * a really good option...), then we can do that.
79 GST_DEBUG_CATEGORY_STATIC (gst_filesrc_debug);
80 #define GST_CAT_DEFAULT gst_filesrc_debug
82 GstElementDetails gst_filesrc_details = GST_ELEMENT_DETAILS ("File Source",
84 "Read from arbitrary point in a file",
85 "Erik Walthinsen <omega@cse.ogi.edu>");
87 #define DEFAULT_BLOCKSIZE 4*1024
88 #define DEFAULT_MMAPSIZE 4*1024*1024
90 /* FileSrc signals and args */
107 static const GstEventMask *
108 gst_filesrc_get_event_mask (GstPad * pad)
110 static const GstEventMask masks[] = {
111 {GST_EVENT_SEEK, GST_SEEK_METHOD_CUR |
112 GST_SEEK_METHOD_SET | GST_SEEK_METHOD_END | GST_SEEK_FLAG_FLUSH},
113 {GST_EVENT_FLUSH, 0},
121 static const GstQueryType *
122 gst_filesrc_get_query_types (GstPad * pad)
124 static const GstQueryType types[] = {
133 static const GstFormat *
134 gst_filesrc_get_formats (GstPad * pad)
136 static const GstFormat formats[] = {
144 static void gst_filesrc_dispose (GObject * object);
146 static void gst_filesrc_set_property (GObject * object, guint prop_id,
147 const GValue * value, GParamSpec * pspec);
148 static void gst_filesrc_get_property (GObject * object, guint prop_id,
149 GValue * value, GParamSpec * pspec);
151 static gboolean gst_filesrc_check_filesize (GstFileSrc * src);
152 static GstData *gst_filesrc_get (GstPad * pad);
153 static gboolean gst_filesrc_srcpad_event (GstPad * pad, GstEvent * event);
154 static gboolean gst_filesrc_srcpad_query (GstPad * pad, GstQueryType type,
155 GstFormat * format, gint64 * value);
157 static GstElementStateReturn gst_filesrc_change_state (GstElement * element);
159 static void gst_filesrc_uri_handler_init (gpointer g_iface,
160 gpointer iface_data);
163 _do_init (GType filesrc_type)
165 static const GInterfaceInfo urihandler_info = {
166 gst_filesrc_uri_handler_init,
171 g_type_add_interface_static (filesrc_type, GST_TYPE_URI_HANDLER,
173 GST_DEBUG_CATEGORY_INIT (gst_filesrc_debug, "filesrc", 0, "filesrc element");
176 GST_BOILERPLATE_FULL (GstFileSrc, gst_filesrc, GstElement, GST_TYPE_ELEMENT,
180 gst_filesrc_base_init (gpointer g_class)
182 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
184 gst_element_class_set_details (gstelement_class, &gst_filesrc_details);
187 gst_filesrc_class_init (GstFileSrcClass * klass)
189 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
190 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
192 gobject_class = (GObjectClass *) klass;
195 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
196 g_param_spec_int ("fd", "File-descriptor",
197 "File-descriptor for the file being mmap()d", 0, G_MAXINT, 0,
199 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOCATION,
200 g_param_spec_string ("location", "File Location",
201 "Location of the file to read", NULL, G_PARAM_READWRITE));
202 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
203 g_param_spec_ulong ("blocksize", "Block size",
204 "Size in bytes to read per buffer", 1, G_MAXULONG, DEFAULT_BLOCKSIZE,
206 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MMAPSIZE,
207 g_param_spec_ulong ("mmapsize", "mmap() Block Size",
208 "Size in bytes of mmap()d regions", 0, G_MAXULONG, DEFAULT_MMAPSIZE,
210 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TOUCH,
211 g_param_spec_boolean ("touch", "Touch read data",
212 "Touch data to force disk read", FALSE, G_PARAM_READWRITE));
214 gobject_class->dispose = gst_filesrc_dispose;
215 gobject_class->set_property = gst_filesrc_set_property;
216 gobject_class->get_property = gst_filesrc_get_property;
218 gstelement_class->change_state = gst_filesrc_change_state;
222 gst_filesrc_init (GstFileSrc * src)
224 src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
225 gst_pad_set_get_function (src->srcpad, gst_filesrc_get);
226 gst_pad_set_event_function (src->srcpad, gst_filesrc_srcpad_event);
227 gst_pad_set_event_mask_function (src->srcpad, gst_filesrc_get_event_mask);
228 gst_pad_set_query_function (src->srcpad, gst_filesrc_srcpad_query);
229 gst_pad_set_query_type_function (src->srcpad, gst_filesrc_get_query_types);
230 gst_pad_set_formats_function (src->srcpad, gst_filesrc_get_formats);
231 gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
234 src->pagesize = getpagesize ();
237 src->filename = NULL;
243 src->block_size = DEFAULT_BLOCKSIZE;
247 src->mapsize = DEFAULT_MMAPSIZE; /* default is 4MB */
251 gst_filesrc_dispose (GObject * object)
255 src = GST_FILESRC (object);
257 g_free (src->filename);
260 /* dispose may be called multiple times */
261 src->filename = NULL;
264 G_OBJECT_CLASS (parent_class)->dispose (object);
268 gst_filesrc_set_location (GstFileSrc * src, const gchar * location)
270 /* the element must be stopped in order to do this */
271 if (GST_STATE (src) != GST_STATE_READY && GST_STATE (src) != GST_STATE_NULL)
274 g_free (src->filename);
277 /* clear the filename if we get a NULL (is that possible?) */
278 if (location == NULL) {
279 src->filename = NULL;
282 src->filename = g_strdup (location);
283 src->uri = gst_uri_construct ("file", src->filename);
285 g_object_notify (G_OBJECT (src), "location");
286 gst_uri_handler_new_uri (GST_URI_HANDLER (src), src->uri);
292 gst_filesrc_set_property (GObject * object, guint prop_id, const GValue * value,
297 /* it's not null if we got it, but it might not be ours */
298 g_return_if_fail (GST_IS_FILESRC (object));
300 src = GST_FILESRC (object);
304 gst_filesrc_set_location (src, g_value_get_string (value));
307 src->block_size = g_value_get_ulong (value);
308 g_object_notify (G_OBJECT (src), "blocksize");
311 if ((src->mapsize % src->pagesize) == 0) {
312 src->mapsize = g_value_get_ulong (value);
313 g_object_notify (G_OBJECT (src), "mmapsize");
315 GST_INFO_OBJECT (src,
316 "invalid mapsize, must be a multiple of pagesize, which is %d",
321 src->touch = g_value_get_boolean (value);
322 g_object_notify (G_OBJECT (src), "touch");
325 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
331 gst_filesrc_get_property (GObject * object, guint prop_id, GValue * value,
336 /* it's not null if we got it, but it might not be ours */
337 g_return_if_fail (GST_IS_FILESRC (object));
339 src = GST_FILESRC (object);
343 g_value_set_string (value, src->filename);
346 g_value_set_int (value, src->fd);
349 g_value_set_ulong (value, src->block_size);
352 g_value_set_ulong (value, src->mapsize);
355 g_value_set_boolean (value, src->touch);
358 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
365 gst_filesrc_free_parent_mmap (GstBuffer * buf)
367 GST_LOG ("freeing mmap()d buffer at %" G_GUINT64_FORMAT "+%u",
368 GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
371 /* madvise to tell the kernel what to do with it */
372 madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_DONTNEED);
374 /* now unmap the memory */
375 munmap (GST_BUFFER_DATA (buf), GST_BUFFER_MAXSIZE (buf));
376 /* cast to unsigned long, since there's no gportable way to print
378 GST_LOG ("unmapped region %08lx+%08lx at %p",
379 (unsigned long) GST_BUFFER_OFFSET (buf),
380 (unsigned long) GST_BUFFER_MAXSIZE (buf), GST_BUFFER_DATA (buf));
382 GST_BUFFER_DATA (buf) = NULL;
388 gst_filesrc_map_region (GstFileSrc * src, off_t offset, size_t size)
394 g_return_val_if_fail (offset >= 0, NULL);
396 GST_LOG_OBJECT (src, "mapping region %08llx+%08lx from file into memory",
397 offset, (unsigned long) size);
398 mmapregion = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
400 if (mmapregion == NULL) {
401 GST_ELEMENT_ERROR (src, RESOURCE, TOO_LAZY, (NULL), ("mmap call failed."));
403 } else if (mmapregion == MAP_FAILED) {
404 GST_WARNING_OBJECT (src, "mmap (0x%08lx, %d, 0x%llx) failed: %s",
405 (unsigned long) size, src->fd, offset, strerror (errno));
408 GST_LOG_OBJECT (src, "mapped region %08lx+%08lx from file into memory at %p",
409 (unsigned long) offset, (unsigned long) size, mmapregion);
411 /* time to allocate a new mapbuf */
412 buf = gst_buffer_new ();
413 /* mmap() the data into this new buffer */
414 GST_BUFFER_DATA (buf) = mmapregion;
416 #ifdef MADV_SEQUENTIAL
417 /* madvise to tell the kernel what to do with it */
419 madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_SEQUENTIAL);
421 /* fill in the rest of the fields */
422 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_READONLY);
423 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_ORIGINAL);
424 GST_BUFFER_SIZE (buf) = size;
425 GST_BUFFER_MAXSIZE (buf) = size;
426 GST_BUFFER_OFFSET (buf) = offset;
427 GST_BUFFER_OFFSET_END (buf) = offset + size;
428 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
429 GST_BUFFER_PRIVATE (buf) = src;
430 GST_BUFFER_FREE_DATA_FUNC (buf) = gst_filesrc_free_parent_mmap;
438 gst_filesrc_map_small_region (GstFileSrc * src, off_t offset, size_t size)
444 /* printf("attempting to map a small buffer at %d+%d\n",offset,size); */
446 /* if the offset starts at a non-page boundary, we have to special case */
447 if ((mod = offset % src->pagesize)) {
450 mapbase = offset - mod;
452 ((size + mod + src->pagesize - 1) / src->pagesize) * src->pagesize;
453 /* printf("not on page boundaries, resizing map to %d+%d\n",mapbase,mapsize);*/
454 map = gst_filesrc_map_region (src, mapbase, mapsize);
458 ret = gst_buffer_create_sub (map, offset - mapbase, size);
459 GST_BUFFER_OFFSET (ret) = GST_BUFFER_OFFSET (map) + offset - mapbase;
461 gst_buffer_unref (map);
466 return gst_filesrc_map_region (src, offset, size);
472 * gst_filesrc_get_mmap:
473 * @pad: #GstPad to push a buffer from
475 * Push a new buffer from the filesrc at the current offset.
478 gst_filesrc_get_mmap (GstFileSrc * src)
480 GstBuffer *buf = NULL;
481 size_t readsize, mapsize;
482 off_t readend, mapstart, mapend;
485 /* calculate end pointers so we don't have to do so repeatedly later */
486 readsize = src->block_size;
487 readend = src->curoffset + src->block_size; /* note this is the byte *after* the read */
488 mapstart = GST_BUFFER_OFFSET (src->mapbuf);
489 mapsize = GST_BUFFER_SIZE (src->mapbuf);
490 mapend = mapstart + mapsize; /* note this is the byte *after* the map */
492 /* check to see if we're going to overflow the end of the file */
493 if (readend > src->filelen) {
494 if (!gst_filesrc_check_filesize (src) || readend > src->filelen) {
495 readsize = src->filelen - src->curoffset;
496 readend = src->curoffset + readsize;
500 GST_LOG ("attempting to read %08lx, %08lx, %08lx, %08lx",
501 (unsigned long) readsize, (unsigned long) readend,
502 (unsigned long) mapstart, (unsigned long) mapend);
504 /* if the start is past the mapstart */
505 if (src->curoffset >= mapstart) {
506 /* if the end is before the mapend, the buffer is in current mmap region... */
507 /* ('cause by definition if readend is in the buffer, so's readstart) */
508 if (readend <= mapend) {
510 "read buf %llu+%d lives in current mapbuf %lld+%d, creating subbuffer of mapbuf",
511 src->curoffset, (int) readsize, mapstart, mapsize);
513 gst_buffer_create_sub (src->mapbuf, src->curoffset - mapstart,
515 GST_BUFFER_OFFSET (buf) = src->curoffset;
517 /* if the start actually is within the current mmap region, map an overlap buffer */
518 } else if (src->curoffset < mapend) {
520 "read buf %llu+%d starts in mapbuf %d+%d but ends outside, creating new mmap",
521 (unsigned long long) src->curoffset, (gint) readsize, (gint) mapstart,
523 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 */
537 "read buf %llu+%d starts before mapbuf %d+%d, but overlaps it",
538 (unsigned long long) src->curoffset, (gint) readsize, (gint) mapstart,
540 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
545 /* then deal with the case where the read buffer is totally outside */
547 /* first check to see if there's a map that covers the right region already */
548 GST_LOG_OBJECT (src, "searching for mapbuf to cover %llu+%d",
549 src->curoffset, (int) readsize);
551 /* if the read buffer crosses a mmap region boundary, create a one-off region */
552 if ((src->curoffset / src->mapsize) != (readend / src->mapsize)) {
554 "read buf %llu+%d crosses a %d-byte boundary, creating a one-off",
555 src->curoffset, (int) readsize, (int) src->mapsize);
556 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
560 /* otherwise we will create a new mmap region and set it to the default */
564 off_t nextmap = src->curoffset - (src->curoffset % src->mapsize);
567 "read buf %llu+%d in new mapbuf at %llu+%d, mapping and subbuffering",
568 src->curoffset, readsize, nextmap, src->mapsize);
569 /* first, we're done with the old mapbuf */
570 gst_buffer_unref (src->mapbuf);
571 mapsize = src->mapsize;
573 /* double the mapsize as long as the readsize is smaller */
574 while (readsize - (src->curoffset - nextmap) > mapsize) {
575 GST_LOG_OBJECT (src, "readsize smaller then mapsize %08x %d",
576 readsize, (int) mapsize);
579 /* create a new one */
580 src->mapbuf = gst_filesrc_map_region (src, nextmap, mapsize);
581 if (src->mapbuf == NULL)
586 gst_buffer_create_sub (src->mapbuf, src->curoffset - nextmap,
588 GST_BUFFER_OFFSET (buf) =
589 GST_BUFFER_OFFSET (src->mapbuf) + src->curoffset - nextmap;
593 /* if we need to touch the buffer (to bring it into memory), do so */
595 volatile guchar *p = GST_BUFFER_DATA (buf), c;
597 for (i = 0; i < GST_BUFFER_SIZE (buf); i += src->pagesize)
601 /* we're done, return the buffer */
602 g_assert (src->curoffset == GST_BUFFER_OFFSET (buf));
603 src->curoffset += GST_BUFFER_SIZE (buf);
609 gst_filesrc_get_read (GstFileSrc * src)
611 GstBuffer *buf = NULL;
615 readsize = src->block_size;
616 if (src->curoffset + readsize > src->filelen) {
617 if (!gst_filesrc_check_filesize (src)
618 || src->curoffset + readsize > src->filelen) {
619 readsize = src->filelen - src->curoffset;
623 buf = gst_buffer_new_and_alloc (readsize);
624 g_return_val_if_fail (buf != NULL, NULL);
626 ret = read (src->fd, GST_BUFFER_DATA (buf), readsize);
628 GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
631 if (ret < readsize) {
632 GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
633 ("unexpected end of file."));
637 GST_BUFFER_SIZE (buf) = readsize;
638 GST_BUFFER_MAXSIZE (buf) = readsize;
639 GST_BUFFER_OFFSET (buf) = src->curoffset;
640 GST_BUFFER_OFFSET_END (buf) = src->curoffset + readsize;
641 src->curoffset += readsize;
647 gst_filesrc_get (GstPad * pad)
651 g_return_val_if_fail (pad != NULL, NULL);
652 src = GST_FILESRC (gst_pad_get_parent (pad));
653 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), NULL);
655 /* check for flush */
656 if (src->need_flush) {
657 src->need_flush = FALSE;
658 GST_DEBUG_OBJECT (src, "sending flush");
659 return GST_DATA (gst_event_new_flush ());
662 if (src->need_discont) {
665 src->need_discont = FALSE;
666 GST_DEBUG_OBJECT (src, "sending discont");
668 gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, src->curoffset,
670 return GST_DATA (event);
674 g_assert (src->curoffset <= src->filelen);
675 if (src->curoffset == src->filelen) {
676 if (!gst_filesrc_check_filesize (src) || src->curoffset >= src->filelen) {
677 GST_DEBUG_OBJECT (src, "eos %" G_GINT64_FORMAT " %" G_GINT64_FORMAT,
678 src->curoffset, src->filelen);
679 gst_element_set_eos (GST_ELEMENT (src));
680 return GST_DATA (gst_event_new (GST_EVENT_EOS));
684 if (src->using_mmap) {
685 return GST_DATA (gst_filesrc_get_mmap (src));
687 return GST_DATA (gst_filesrc_get_read (src));
690 return GST_DATA (gst_filesrc_get_read (src));
694 /* TRUE if the filesize of the file was updated */
696 gst_filesrc_check_filesize (GstFileSrc * src)
698 struct stat stat_results;
700 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), FALSE);
702 fstat (src->fd, &stat_results);
703 GST_DEBUG_OBJECT (src,
704 "checked filesize on %s (was %" G_GUINT64_FORMAT ", is %" G_GUINT64_FORMAT
705 ")", src->filename, src->filelen, (guint64) stat_results.st_size);
706 if (src->filelen == (guint64) stat_results.st_size)
708 src->filelen = stat_results.st_size;
712 /* open the file and mmap it, necessary to go to READY state */
714 gst_filesrc_open_file (GstFileSrc * src)
716 g_return_val_if_fail (!GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), FALSE);
718 if (src->filename == NULL || src->filename[0] == '\0') {
719 GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND,
720 (_("No file name specified for reading.")), (NULL));
725 GST_INFO_OBJECT (src, "opening file %s", src->filename);
728 src->fd = open (src->filename, O_RDONLY);
731 GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL), (NULL));
733 GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
734 (_("Could not open file \"%s\" for reading."), src->filename),
738 /* check if it is a regular file, otherwise bail out */
739 struct stat stat_results;
741 fstat (src->fd, &stat_results);
743 if (!S_ISREG (stat_results.st_mode)) {
744 GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
745 (_("File \"%s\" isn't a regular file."), src->filename), (NULL));
750 /* find the file length */
751 src->filelen = stat_results.st_size;
753 src->using_mmap = FALSE;
755 /* allocate the first mmap'd region */
756 src->mapbuf = gst_filesrc_map_region (src, 0, src->mapsize);
757 if (src->mapbuf != NULL) {
758 src->using_mmap = TRUE;
765 GST_FLAG_SET (src, GST_FILESRC_OPEN);
770 /* unmap and close the file */
772 gst_filesrc_close_file (GstFileSrc * src)
774 g_return_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN));
779 /* zero out a lot of our state */
785 gst_buffer_unref (src->mapbuf);
789 GST_FLAG_UNSET (src, GST_FILESRC_OPEN);
793 static GstElementStateReturn
794 gst_filesrc_change_state (GstElement * element)
796 GstFileSrc *src = GST_FILESRC (element);
798 switch (GST_STATE_TRANSITION (element)) {
799 case GST_STATE_NULL_TO_READY:
801 case GST_STATE_READY_TO_NULL:
803 case GST_STATE_READY_TO_PAUSED:
804 if (!GST_FLAG_IS_SET (element, GST_FILESRC_OPEN)) {
805 if (!gst_filesrc_open_file (GST_FILESRC (element)))
806 return GST_STATE_FAILURE;
808 src->need_discont = TRUE;
810 case GST_STATE_PAUSED_TO_READY:
811 if (GST_FLAG_IS_SET (element, GST_FILESRC_OPEN))
812 gst_filesrc_close_file (GST_FILESRC (element));
813 src->need_discont = TRUE;
819 if (GST_ELEMENT_CLASS (parent_class)->change_state)
820 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
822 return GST_STATE_SUCCESS;
826 gst_filesrc_srcpad_query (GstPad * pad, GstQueryType type,
827 GstFormat * format, gint64 * value)
829 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
832 case GST_QUERY_TOTAL:
833 if (*format != GST_FORMAT_BYTES) {
836 gst_filesrc_check_filesize (src);
837 *value = src->filelen;
839 case GST_QUERY_POSITION:
841 case GST_FORMAT_BYTES:
842 *value = src->curoffset;
844 case GST_FORMAT_PERCENT:
845 if (src->filelen == 0)
847 *value = src->curoffset * GST_FORMAT_PERCENT_MAX / src->filelen;
861 gst_filesrc_srcpad_event (GstPad * pad, GstEvent * event)
863 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
865 GST_DEBUG_OBJECT (src, "event %d", GST_EVENT_TYPE (event));
867 switch (GST_EVENT_TYPE (event)) {
872 if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_BYTES) {
876 offset = GST_EVENT_SEEK_OFFSET (event);
878 switch (GST_EVENT_SEEK_METHOD (event)) {
879 case GST_SEEK_METHOD_SET:
881 (offset > src->filelen && (!gst_filesrc_check_filesize (src)
882 || offset > src->filelen))) {
885 src->curoffset = offset;
886 GST_DEBUG_OBJECT (src, "seek set pending to %" G_GINT64_FORMAT,
889 case GST_SEEK_METHOD_CUR:
890 if (offset + src->curoffset > src->filelen)
891 if (!gst_filesrc_check_filesize (src)
892 || offset + src->curoffset > src->filelen)
894 src->curoffset += offset;
895 GST_DEBUG_OBJECT (src, "seek cur pending to %" G_GINT64_FORMAT,
898 case GST_SEEK_METHOD_END:
899 if (ABS (offset) > src->filelen) {
900 if (!gst_filesrc_check_filesize (src)
901 || ABS (offset) > src->filelen)
905 src->curoffset = src->filelen - ABS (offset);
906 GST_DEBUG_OBJECT (src, "seek end pending to %" G_GINT64_FORMAT,
913 src->need_discont = TRUE;
914 src->need_flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
918 if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
921 src->block_size = GST_EVENT_SIZE_VALUE (event);
922 g_object_notify (G_OBJECT (src), "blocksize");
924 case GST_EVENT_FLUSH:
925 src->need_flush = TRUE;
931 gst_event_unref (event);
935 gst_event_unref (event);
939 /*** GSTURIHANDLER INTERFACE *************************************************/
942 gst_filesrc_uri_get_type (void)
947 gst_filesrc_uri_get_protocols (void)
949 static gchar *protocols[] = { "file", NULL };
954 gst_filesrc_uri_get_uri (GstURIHandler * handler)
956 GstFileSrc *src = GST_FILESRC (handler);
962 gst_filesrc_uri_set_uri (GstURIHandler * handler, const gchar * uri)
964 gchar *protocol, *location;
966 GstFileSrc *src = GST_FILESRC (handler);
968 protocol = gst_uri_get_protocol (uri);
969 if (strcmp (protocol, "file") != 0) {
974 location = gst_uri_get_location (uri);
975 ret = gst_filesrc_set_location (src, location);
982 gst_filesrc_uri_handler_init (gpointer g_iface, gpointer iface_data)
984 GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
986 iface->get_type = gst_filesrc_uri_get_type;
987 iface->get_protocols = gst_filesrc_uri_get_protocols;
988 iface->get_uri = gst_filesrc_uri_get_uri;
989 iface->set_uri = gst_filesrc_uri_set_uri;