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"
42 #include "../gst-i18n-lib.h"
44 /* FIXME we should be using glib for this */
46 #define S_ISREG(mode) ((mode)&_S_IFREG)
49 #define S_ISDIR(mode) ((mode)&_S_IFDIR)
52 #define S_ISSOCK(x) (0)
55 /**********************************************************************
56 * GStreamer Default File Source
59 * This source uses mmap(2) to efficiently load data from a file.
60 * To do this without seriously polluting the applications' memory
61 * space, it must do so in smaller chunks, say 1-4MB at a time.
62 * Buffers are then subdivided from these mmap'd chunks, to directly
63 * make use of the mmap.
65 * To handle refcounting so that the mmap can be freed at the appropriate
66 * time, a buffer will be created for each mmap'd region, and all new
67 * buffers will be sub-buffers of this top-level buffer. As they are
68 * freed, the refcount goes down on the mmap'd buffer and its free()
69 * function is called, which will call munmap(2) on itself.
71 * If a buffer happens to cross the boundaries of an mmap'd region, we
72 * have to decide whether it's more efficient to copy the data into a
73 * new buffer, or mmap() just that buffer. There will have to be a
74 * breakpoint size to determine which will be done. The mmap() size
75 * has a lot to do with this as well, because you end up in double-
76 * jeopardy: the larger the outgoing buffer, the more data to copy when
77 * it overlaps, *and* the more frequently you'll have buffers that *do*
80 * Seeking is another tricky aspect to do efficiently. The initial
81 * implementation of this source won't make use of these features, however.
82 * The issue is that if an application seeks backwards in a file, *and*
83 * that region of the file is covered by an mmap that hasn't been fully
84 * deallocated, we really should re-use it. But keeping track of these
85 * regions is tricky because we have to lock the structure that holds
86 * them. We need to settle on a locking primitive (GMutex seems to be
87 * a really good option...), then we can do that.
91 GST_DEBUG_CATEGORY_STATIC (gst_filesrc_debug);
92 #define GST_CAT_DEFAULT gst_filesrc_debug
94 GstElementDetails gst_filesrc_details = GST_ELEMENT_DETAILS ("File Source",
96 "Read from arbitrary point in a file",
97 "Erik Walthinsen <omega@cse.ogi.edu>");
99 #define DEFAULT_BLOCKSIZE 4*1024
100 #define DEFAULT_MMAPSIZE 4*1024*1024
102 /* FileSrc signals and args */
119 static const GstEventMask *
120 gst_filesrc_get_event_mask (GstPad * pad)
122 static const GstEventMask masks[] = {
123 {GST_EVENT_SEEK, GST_SEEK_METHOD_CUR |
124 GST_SEEK_METHOD_SET | GST_SEEK_METHOD_END | GST_SEEK_FLAG_FLUSH},
125 {GST_EVENT_FLUSH, 0},
133 static const GstQueryType *
134 gst_filesrc_get_query_types (GstPad * pad)
136 static const GstQueryType types[] = {
145 static const GstFormat *
146 gst_filesrc_get_formats (GstPad * pad)
148 static const GstFormat formats[] = {
156 static void gst_filesrc_dispose (GObject * object);
158 static void gst_filesrc_set_property (GObject * object, guint prop_id,
159 const GValue * value, GParamSpec * pspec);
160 static void gst_filesrc_get_property (GObject * object, guint prop_id,
161 GValue * value, GParamSpec * pspec);
163 static gboolean gst_filesrc_check_filesize (GstFileSrc * src);
164 static GstData *gst_filesrc_get (GstPad * pad);
165 static gboolean gst_filesrc_srcpad_event (GstPad * pad, GstEvent * event);
166 static gboolean gst_filesrc_srcpad_query (GstPad * pad, GstQueryType type,
167 GstFormat * format, gint64 * value);
169 static GstElementStateReturn gst_filesrc_change_state (GstElement * element);
171 static void gst_filesrc_uri_handler_init (gpointer g_iface,
172 gpointer iface_data);
175 _do_init (GType filesrc_type)
177 static const GInterfaceInfo urihandler_info = {
178 gst_filesrc_uri_handler_init,
183 g_type_add_interface_static (filesrc_type, GST_TYPE_URI_HANDLER,
185 GST_DEBUG_CATEGORY_INIT (gst_filesrc_debug, "filesrc", 0, "filesrc element");
188 GST_BOILERPLATE_FULL (GstFileSrc, gst_filesrc, GstElement, GST_TYPE_ELEMENT,
192 gst_filesrc_base_init (gpointer g_class)
194 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
196 gst_element_class_set_details (gstelement_class, &gst_filesrc_details);
199 gst_filesrc_class_init (GstFileSrcClass * klass)
201 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
202 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
204 gobject_class = (GObjectClass *) klass;
207 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
208 g_param_spec_int ("fd", "File-descriptor",
209 "File-descriptor for the file being mmap()d", 0, G_MAXINT, 0,
211 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOCATION,
212 g_param_spec_string ("location", "File Location",
213 "Location of the file to read", NULL, G_PARAM_READWRITE));
214 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
215 g_param_spec_ulong ("blocksize", "Block size",
216 "Size in bytes to read per buffer", 1, G_MAXULONG, DEFAULT_BLOCKSIZE,
218 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MMAPSIZE,
219 g_param_spec_ulong ("mmapsize", "mmap() Block Size",
220 "Size in bytes of mmap()d regions", 0, G_MAXULONG, DEFAULT_MMAPSIZE,
222 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TOUCH,
223 g_param_spec_boolean ("touch", "Touch read data",
224 "Touch data to force disk read", FALSE, G_PARAM_READWRITE));
226 gobject_class->dispose = gst_filesrc_dispose;
227 gobject_class->set_property = gst_filesrc_set_property;
228 gobject_class->get_property = gst_filesrc_get_property;
230 gstelement_class->change_state = gst_filesrc_change_state;
234 gst_filesrc_init (GstFileSrc * src)
236 src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
237 gst_pad_set_get_function (src->srcpad, gst_filesrc_get);
238 gst_pad_set_event_function (src->srcpad, gst_filesrc_srcpad_event);
239 gst_pad_set_event_mask_function (src->srcpad, gst_filesrc_get_event_mask);
240 gst_pad_set_query_function (src->srcpad, gst_filesrc_srcpad_query);
241 gst_pad_set_query_type_function (src->srcpad, gst_filesrc_get_query_types);
242 gst_pad_set_formats_function (src->srcpad, gst_filesrc_get_formats);
243 gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
246 src->pagesize = getpagesize ();
249 src->filename = NULL;
255 src->block_size = DEFAULT_BLOCKSIZE;
259 src->mapsize = DEFAULT_MMAPSIZE; /* default is 4MB */
261 src->is_regular = FALSE;
265 gst_filesrc_dispose (GObject * object)
269 src = GST_FILESRC (object);
271 g_free (src->filename);
274 /* dispose may be called multiple times */
275 src->filename = NULL;
278 G_OBJECT_CLASS (parent_class)->dispose (object);
282 gst_filesrc_set_location (GstFileSrc * src, const gchar * location)
284 /* the element must be stopped in order to do this */
285 if (GST_STATE (src) != GST_STATE_READY && GST_STATE (src) != GST_STATE_NULL)
288 g_free (src->filename);
291 /* clear the filename if we get a NULL (is that possible?) */
292 if (location == NULL) {
293 src->filename = NULL;
296 src->filename = g_strdup (location);
297 src->uri = gst_uri_construct ("file", src->filename);
299 g_object_notify (G_OBJECT (src), "location");
300 gst_uri_handler_new_uri (GST_URI_HANDLER (src), src->uri);
306 gst_filesrc_set_property (GObject * object, guint prop_id, const GValue * value,
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 gst_filesrc_set_location (src, g_value_get_string (value));
321 src->block_size = g_value_get_ulong (value);
322 g_object_notify (G_OBJECT (src), "blocksize");
325 if ((src->mapsize % src->pagesize) == 0) {
326 src->mapsize = g_value_get_ulong (value);
327 g_object_notify (G_OBJECT (src), "mmapsize");
329 GST_INFO_OBJECT (src,
330 "invalid mapsize, must be a multiple of pagesize, which is %d",
335 src->touch = g_value_get_boolean (value);
336 g_object_notify (G_OBJECT (src), "touch");
339 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
345 gst_filesrc_get_property (GObject * object, guint prop_id, GValue * value,
350 /* it's not null if we got it, but it might not be ours */
351 g_return_if_fail (GST_IS_FILESRC (object));
353 src = GST_FILESRC (object);
357 g_value_set_string (value, src->filename);
360 g_value_set_int (value, src->fd);
363 g_value_set_ulong (value, src->block_size);
366 g_value_set_ulong (value, src->mapsize);
369 g_value_set_boolean (value, src->touch);
372 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
379 gst_filesrc_free_parent_mmap (GstBuffer * buf)
381 GST_LOG ("freeing mmap()d buffer at %" G_GUINT64_FORMAT "+%u",
382 GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
385 /* madvise to tell the kernel what to do with it */
386 madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_DONTNEED);
388 /* now unmap the memory */
389 munmap (GST_BUFFER_DATA (buf), GST_BUFFER_MAXSIZE (buf));
390 /* cast to unsigned long, since there's no gportable way to print
392 GST_LOG ("unmapped region %08lx+%08lx at %p",
393 (unsigned long) GST_BUFFER_OFFSET (buf),
394 (unsigned long) GST_BUFFER_MAXSIZE (buf), GST_BUFFER_DATA (buf));
396 GST_BUFFER_DATA (buf) = NULL;
402 gst_filesrc_map_region (GstFileSrc * src, off_t offset, size_t size)
408 g_return_val_if_fail (offset >= 0, NULL);
410 GST_LOG_OBJECT (src, "mapping region %08llx+%08lx from file into memory",
411 offset, (unsigned long) size);
412 mmapregion = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
414 if (mmapregion == NULL) {
415 GST_ELEMENT_ERROR (src, RESOURCE, TOO_LAZY, (NULL), ("mmap call failed."));
417 } else if (mmapregion == MAP_FAILED) {
418 GST_WARNING_OBJECT (src, "mmap (0x%08lx, %d, 0x%llx) failed: %s",
419 (unsigned long) size, src->fd, offset, strerror (errno));
422 GST_LOG_OBJECT (src, "mapped region %08lx+%08lx from file into memory at %p",
423 (unsigned long) offset, (unsigned long) size, mmapregion);
425 /* time to allocate a new mapbuf */
426 buf = gst_buffer_new ();
427 /* mmap() the data into this new buffer */
428 GST_BUFFER_DATA (buf) = mmapregion;
430 #ifdef MADV_SEQUENTIAL
431 /* madvise to tell the kernel what to do with it */
433 madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_SEQUENTIAL);
435 /* fill in the rest of the fields */
436 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_READONLY);
437 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_ORIGINAL);
438 GST_BUFFER_SIZE (buf) = size;
439 GST_BUFFER_MAXSIZE (buf) = size;
440 GST_BUFFER_OFFSET (buf) = offset;
441 GST_BUFFER_OFFSET_END (buf) = offset + size;
442 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
443 GST_BUFFER_PRIVATE (buf) = src;
444 GST_BUFFER_FREE_DATA_FUNC (buf) = gst_filesrc_free_parent_mmap;
452 gst_filesrc_map_small_region (GstFileSrc * src, off_t offset, size_t size)
458 /* printf("attempting to map a small buffer at %d+%d\n",offset,size); */
460 /* if the offset starts at a non-page boundary, we have to special case */
461 if ((mod = offset % src->pagesize)) {
464 mapbase = offset - mod;
466 ((size + mod + src->pagesize - 1) / src->pagesize) * src->pagesize;
467 /* printf("not on page boundaries, resizing map to %d+%d\n",mapbase,mapsize);*/
468 map = gst_filesrc_map_region (src, mapbase, mapsize);
472 ret = gst_buffer_create_sub (map, offset - mapbase, size);
473 GST_BUFFER_OFFSET (ret) = GST_BUFFER_OFFSET (map) + offset - mapbase;
475 gst_buffer_unref (map);
480 return gst_filesrc_map_region (src, offset, size);
486 * gst_filesrc_get_mmap:
487 * @src: #GstElement to get data from
489 * Returns: a new #GstData from the mmap'd source.
492 gst_filesrc_get_mmap (GstFileSrc * src)
494 GstBuffer *buf = NULL;
495 size_t readsize, mapsize;
496 off_t readend, mapstart, mapend;
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 mapsize = GST_BUFFER_SIZE (src->mapbuf);
504 mapend = mapstart + mapsize; /* note this is the byte *after* the map */
506 /* check to see if we're going to overflow the end of the file */
507 if (readend > src->filelen) {
508 if (!gst_filesrc_check_filesize (src) || readend > src->filelen) {
509 readsize = src->filelen - src->curoffset;
510 readend = src->curoffset + readsize;
514 GST_LOG ("attempting to read %08lx, %08lx, %08lx, %08lx",
515 (unsigned long) readsize, (unsigned long) readend,
516 (unsigned long) mapstart, (unsigned long) mapend);
518 /* if the start is past the mapstart */
519 if (src->curoffset >= mapstart) {
520 /* if the end is before the mapend, the buffer is in current mmap region... */
521 /* ('cause by definition if readend is in the buffer, so's readstart) */
522 if (readend <= mapend) {
524 "read buf %llu+%d lives in current mapbuf %lld+%d, creating subbuffer of mapbuf",
525 src->curoffset, (int) readsize, mapstart, mapsize);
527 gst_buffer_create_sub (src->mapbuf, src->curoffset - mapstart,
529 GST_BUFFER_OFFSET (buf) = src->curoffset;
531 /* if the start actually is within the current mmap region, map an overlap buffer */
532 } else if (src->curoffset < mapend) {
534 "read buf %llu+%d starts in mapbuf %d+%d but ends outside, creating new mmap",
535 (unsigned long long) src->curoffset, (gint) readsize, (gint) mapstart,
537 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
542 /* the only other option is that buffer is totally outside, which means we search for it */
544 /* now we can assume that the start is *before* the current mmap region */
545 /* if the readend is past mapstart, we have two options */
546 } else if (readend >= mapstart) {
547 /* either the read buffer overlaps the start of the mmap region */
548 /* or the read buffer fully contains the current mmap region */
549 /* either way, it's really not relevant, we just create a new region anyway */
551 "read buf %llu+%d starts before mapbuf %d+%d, but overlaps it",
552 (unsigned long long) src->curoffset, (gint) readsize, (gint) mapstart,
554 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
559 /* then deal with the case where the read buffer is totally outside */
561 /* first check to see if there's a map that covers the right region already */
562 GST_LOG_OBJECT (src, "searching for mapbuf to cover %llu+%d",
563 src->curoffset, (int) readsize);
565 /* if the read buffer crosses a mmap region boundary, create a one-off region */
566 if ((src->curoffset / src->mapsize) != (readend / src->mapsize)) {
568 "read buf %llu+%d crosses a %d-byte boundary, creating a one-off",
569 src->curoffset, (int) readsize, (int) src->mapsize);
570 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);
581 "read buf %llu+%d in new mapbuf at %llu+%d, mapping and subbuffering",
582 src->curoffset, readsize, nextmap, src->mapsize);
583 /* first, we're done with the old mapbuf */
584 gst_buffer_unref (src->mapbuf);
585 mapsize = src->mapsize;
587 /* double the mapsize as long as the readsize is smaller */
588 while (readsize - (src->curoffset - nextmap) > mapsize) {
589 GST_LOG_OBJECT (src, "readsize smaller then mapsize %08x %d",
590 readsize, (int) mapsize);
593 /* create a new one */
594 src->mapbuf = gst_filesrc_map_region (src, nextmap, mapsize);
595 if (src->mapbuf == NULL)
600 gst_buffer_create_sub (src->mapbuf, src->curoffset - nextmap,
602 GST_BUFFER_OFFSET (buf) =
603 GST_BUFFER_OFFSET (src->mapbuf) + src->curoffset - nextmap;
607 /* if we need to touch the buffer (to bring it into memory), do so */
609 volatile guchar *p = GST_BUFFER_DATA (buf), c;
611 for (i = 0; i < GST_BUFFER_SIZE (buf); i += src->pagesize)
615 /* we're done, return the buffer */
616 g_assert (src->curoffset == GST_BUFFER_OFFSET (buf));
617 src->curoffset += GST_BUFFER_SIZE (buf);
618 return GST_DATA (buf);
623 gst_filesrc_get_read (GstFileSrc * src)
625 GstBuffer *buf = NULL;
629 readsize = src->block_size;
630 /* for regular files, we can use the filesize to check how much we
632 if (src->is_regular) {
633 if (src->curoffset + readsize > src->filelen) {
634 if (!gst_filesrc_check_filesize (src)
635 || src->curoffset + readsize > src->filelen) {
636 readsize = src->filelen - src->curoffset;
641 buf = gst_buffer_new_and_alloc (readsize);
642 g_return_val_if_fail (buf != NULL, NULL);
644 GST_LOG_OBJECT (src, "Reading %d bytes", readsize);
645 ret = read (src->fd, GST_BUFFER_DATA (buf), readsize);
647 GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
650 /* regular files should have given us what we expected */
651 if (ret < readsize && src->is_regular) {
652 GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL),
653 ("unexpected end of file."));
656 /* other files should eos if they read 0 */
658 GST_DEBUG ("non-regular file hits EOS");
659 gst_buffer_unref (buf);
660 gst_element_set_eos (GST_ELEMENT (src));
661 return GST_DATA (gst_event_new (GST_EVENT_EOS));
665 GST_BUFFER_SIZE (buf) = readsize;
666 GST_BUFFER_MAXSIZE (buf) = readsize;
667 GST_BUFFER_OFFSET (buf) = src->curoffset;
668 GST_BUFFER_OFFSET_END (buf) = src->curoffset + readsize;
669 src->curoffset += readsize;
671 return GST_DATA (buf);
675 gst_filesrc_get (GstPad * pad)
679 g_return_val_if_fail (pad != NULL, NULL);
680 src = GST_FILESRC (gst_pad_get_parent (pad));
681 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), NULL);
683 /* check for flush */
684 if (src->need_flush) {
685 src->need_flush = FALSE;
686 GST_DEBUG_OBJECT (src, "sending flush");
687 return GST_DATA (gst_event_new_flush ());
690 if (src->need_discont) {
693 GST_DEBUG_OBJECT (src, "sending discont");
695 gst_event_new_discontinuous (src->need_discont > 1, GST_FORMAT_BYTES,
696 src->curoffset, NULL);
697 src->need_discont = 0;
698 return GST_DATA (event);
701 /* check for EOF if it's a regular file */
702 if (src->is_regular) {
703 g_assert (src->curoffset <= src->filelen);
704 if (src->curoffset == src->filelen) {
705 if (!gst_filesrc_check_filesize (src) || src->curoffset >= src->filelen) {
706 GST_DEBUG_OBJECT (src, "eos %" G_GINT64_FORMAT " %" G_GINT64_FORMAT,
707 src->curoffset, src->filelen);
709 gst_element_set_eos (GST_ELEMENT (src));
710 return GST_DATA (gst_event_new (GST_EVENT_EOS));
715 if (src->using_mmap) {
716 return gst_filesrc_get_mmap (src);
718 return gst_filesrc_get_read (src);
721 return gst_filesrc_get_read (src);
725 /* TRUE if the filesize of the file was updated */
727 gst_filesrc_check_filesize (GstFileSrc * src)
729 struct stat stat_results;
731 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), FALSE);
733 fstat (src->fd, &stat_results);
734 GST_DEBUG_OBJECT (src,
735 "checked filesize on %s (was %" G_GUINT64_FORMAT ", is %" G_GUINT64_FORMAT
736 ")", src->filename, src->filelen, (guint64) stat_results.st_size);
737 if (src->filelen == (guint64) stat_results.st_size)
739 src->filelen = stat_results.st_size;
743 /* open the file and mmap it, necessary to go to READY state */
745 gst_filesrc_open_file (GstFileSrc * src)
747 g_return_val_if_fail (!GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), FALSE);
749 if (src->filename == NULL || src->filename[0] == '\0') {
750 GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND,
751 (_("No file name specified for reading.")), (NULL));
756 GST_INFO_OBJECT (src, "opening file %s", src->filename);
759 src->fd = open (src->filename, O_RDONLY);
762 GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL),
763 ("No such file \"%s\"", src->filename));
765 GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
766 (_("Could not open file \"%s\" for reading."), src->filename),
770 /* check if it is a regular file, otherwise bail out */
771 struct stat stat_results;
773 fstat (src->fd, &stat_results);
775 if (S_ISDIR (stat_results.st_mode)) {
776 GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
777 (_("\"%s\" is a directory."), src->filename), (NULL));
781 if (S_ISSOCK (stat_results.st_mode)) {
782 GST_ELEMENT_ERROR (src, RESOURCE, OPEN_READ,
783 (_("File \"%s\" is a socket."), src->filename), (NULL));
788 /* find the file length */
789 src->filelen = stat_results.st_size;
791 src->using_mmap = FALSE;
793 /* record if it's a regular (hence seekable and lengthable) file */
794 if (S_ISREG (stat_results.st_mode))
795 src->is_regular = TRUE;
797 /* FIXME: maybe we should only try to mmap if it's a regular file */
798 /* allocate the first mmap'd region if it's a regular file ? */
799 src->mapbuf = gst_filesrc_map_region (src, 0, src->mapsize);
800 if (src->mapbuf != NULL) {
801 GST_DEBUG_OBJECT (src, "using mmap for file");
802 src->using_mmap = TRUE;
808 GST_FLAG_SET (src, GST_FILESRC_OPEN);
813 /* unmap and close the file */
815 gst_filesrc_close_file (GstFileSrc * src)
817 g_return_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN));
822 /* zero out a lot of our state */
826 src->is_regular = FALSE;
829 gst_buffer_unref (src->mapbuf);
833 GST_FLAG_UNSET (src, GST_FILESRC_OPEN);
837 static GstElementStateReturn
838 gst_filesrc_change_state (GstElement * element)
840 GstFileSrc *src = GST_FILESRC (element);
842 switch (GST_STATE_TRANSITION (element)) {
843 case GST_STATE_NULL_TO_READY:
845 case GST_STATE_READY_TO_NULL:
847 case GST_STATE_READY_TO_PAUSED:
848 if (!GST_FLAG_IS_SET (element, GST_FILESRC_OPEN)) {
849 if (!gst_filesrc_open_file (GST_FILESRC (element)))
850 return GST_STATE_FAILURE;
852 src->need_discont = 2;
854 case GST_STATE_PAUSED_TO_READY:
855 if (GST_FLAG_IS_SET (element, GST_FILESRC_OPEN))
856 gst_filesrc_close_file (GST_FILESRC (element));
862 if (GST_ELEMENT_CLASS (parent_class)->change_state)
863 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
865 return GST_STATE_SUCCESS;
869 gst_filesrc_srcpad_query (GstPad * pad, GstQueryType type,
870 GstFormat * format, gint64 * value)
872 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
875 case GST_QUERY_TOTAL:
876 if (*format != GST_FORMAT_BYTES) {
879 if (!src->is_regular)
881 gst_filesrc_check_filesize (src);
882 *value = src->filelen;
884 case GST_QUERY_POSITION:
886 case GST_FORMAT_BYTES:
887 *value = src->curoffset;
889 case GST_FORMAT_PERCENT:
890 if (src->filelen == 0)
892 if (!src->is_regular)
894 *value = src->curoffset * GST_FORMAT_PERCENT_MAX / src->filelen;
908 gst_filesrc_srcpad_event (GstPad * pad, GstEvent * event)
910 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
912 GST_DEBUG_OBJECT (src, "event %d", GST_EVENT_TYPE (event));
914 switch (GST_EVENT_TYPE (event)) {
919 if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_BYTES) {
922 if (!src->is_regular) {
923 GST_DEBUG ("can't handle seek on a non-regular file");
927 offset = GST_EVENT_SEEK_OFFSET (event);
929 switch (GST_EVENT_SEEK_METHOD (event)) {
930 case GST_SEEK_METHOD_SET:
932 (offset > src->filelen && (!gst_filesrc_check_filesize (src)
933 || offset > src->filelen))) {
936 src->curoffset = offset;
937 GST_DEBUG_OBJECT (src, "seek set pending to %" G_GINT64_FORMAT,
940 case GST_SEEK_METHOD_CUR:
941 if (offset + src->curoffset > src->filelen)
942 if (!gst_filesrc_check_filesize (src)
943 || offset + src->curoffset > src->filelen)
945 src->curoffset += offset;
946 GST_DEBUG_OBJECT (src, "seek cur pending to %" G_GINT64_FORMAT,
949 case GST_SEEK_METHOD_END:
950 if (ABS (offset) > src->filelen) {
951 if (!gst_filesrc_check_filesize (src)
952 || ABS (offset) > src->filelen)
956 src->curoffset = src->filelen - ABS (offset);
957 GST_DEBUG_OBJECT (src, "seek end pending to %" G_GINT64_FORMAT,
964 src->need_discont = 1;
965 src->need_flush = GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
969 if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
972 src->block_size = GST_EVENT_SIZE_VALUE (event);
973 g_object_notify (G_OBJECT (src), "blocksize");
975 case GST_EVENT_FLUSH:
976 src->need_flush = TRUE;
982 gst_event_unref (event);
986 gst_event_unref (event);
990 /*** GSTURIHANDLER INTERFACE *************************************************/
993 gst_filesrc_uri_get_type (void)
998 gst_filesrc_uri_get_protocols (void)
1000 static gchar *protocols[] = { "file", NULL };
1004 static const gchar *
1005 gst_filesrc_uri_get_uri (GstURIHandler * handler)
1007 GstFileSrc *src = GST_FILESRC (handler);
1013 gst_filesrc_uri_set_uri (GstURIHandler * handler, const gchar * uri)
1015 gchar *protocol, *location;
1017 GstFileSrc *src = GST_FILESRC (handler);
1019 protocol = gst_uri_get_protocol (uri);
1020 if (strcmp (protocol, "file") != 0) {
1025 location = gst_uri_get_location (uri);
1026 ret = gst_filesrc_set_location (src, location);
1033 gst_filesrc_uri_handler_init (gpointer g_iface, gpointer iface_data)
1035 GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
1037 iface->get_type = gst_filesrc_uri_get_type;
1038 iface->get_protocols = gst_filesrc_uri_get_protocols;
1039 iface->get_uri = gst_filesrc_uri_get_uri;
1040 iface->set_uri = gst_filesrc_uri_set_uri;