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"
39 /**********************************************************************
40 * GStreamer Default File Source
43 * This source uses mmap(2) to efficiently load data from a file.
44 * To do this without seriously polluting the applications' memory
45 * space, it must do so in smaller chunks, say 1-4MB at a time.
46 * Buffers are then subdivided from these mmap'd chunks, to directly
47 * make use of the mmap.
49 * To handle refcounting so that the mmap can be freed at the appropriate
50 * time, a buffer will be created for each mmap'd region, and all new
51 * buffers will be sub-buffers of this top-level buffer. As they are
52 * freed, the refcount goes down on the mmap'd buffer and its free()
53 * function is called, which will call munmap(2) on itself.
55 * If a buffer happens to cross the boundaries of an mmap'd region, we
56 * have to decide whether it's more efficient to copy the data into a
57 * new buffer, or mmap() just that buffer. There will have to be a
58 * breakpoint size to determine which will be done. The mmap() size
59 * has a lot to do with this as well, because you end up in double-
60 * jeopardy: the larger the outgoing buffer, the more data to copy when
61 * it overlaps, *and* the more frequently you'll have buffers that *do*
64 * Seeking is another tricky aspect to do efficiently. The initial
65 * implementation of this source won't make use of these features, however.
66 * The issue is that if an application seeks backwards in a file, *and*
67 * that region of the file is covered by an mmap that hasn't been fully
68 * deallocated, we really should re-use it. But keeping track of these
69 * regions is tricky because we have to lock the structure that holds
70 * them. We need to settle on a locking primitive (GMutex seems to be
71 * a really good option...), then we can do that.
75 GST_DEBUG_CATEGORY_STATIC (gst_filesrc_debug);
76 #define GST_CAT_DEFAULT gst_filesrc_debug
78 GstElementDetails gst_filesrc_details = GST_ELEMENT_DETAILS (
81 "Read from arbitrary point in a file",
82 "Erik Walthinsen <omega@cse.ogi.edu>"
85 #define DEFAULT_BLOCKSIZE 4*1024
86 #define DEFAULT_MMAPSIZE 4*1024*1024
88 /* FileSrc signals and args */
103 GST_PAD_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,
117 GST_PAD_FORMATS_FUNCTION (gst_filesrc_get_formats,
121 static void gst_filesrc_base_init (gpointer g_class);
122 static void gst_filesrc_class_init (GstFileSrcClass *klass);
123 static void gst_filesrc_init (GstFileSrc *filesrc);
124 static void gst_filesrc_dispose (GObject *object);
126 static void gst_filesrc_set_property (GObject *object, guint prop_id,
127 const GValue *value, GParamSpec *pspec);
128 static void gst_filesrc_get_property (GObject *object, guint prop_id,
129 GValue *value, GParamSpec *pspec);
131 static gboolean gst_filesrc_check_filesize (GstFileSrc *src);
132 static GstData * gst_filesrc_get (GstPad *pad);
133 static gboolean gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event);
134 static gboolean gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
135 GstFormat *format, gint64 *value);
137 static GstElementStateReturn gst_filesrc_change_state (GstElement *element);
139 static void gst_filesrc_uri_handler_init (gpointer g_iface, gpointer iface_data);
142 static GstElementClass *parent_class = NULL;
143 /*static guint gst_filesrc_signals[LAST_SIGNAL] = { 0 };*/
146 gst_filesrc_get_type(void)
148 static GType filesrc_type = 0;
151 static const GTypeInfo filesrc_info = {
152 sizeof(GstFileSrcClass),
153 gst_filesrc_base_init,
155 (GClassInitFunc)gst_filesrc_class_init,
160 (GInstanceInitFunc)gst_filesrc_init,
162 static const GInterfaceInfo urihandler_info = {
163 gst_filesrc_uri_handler_init,
167 filesrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFileSrc", &filesrc_info, 0);
169 g_type_add_interface_static (filesrc_type, GST_TYPE_URI_HANDLER, &urihandler_info);
171 GST_DEBUG_CATEGORY_INIT (gst_filesrc_debug, "filesrc", 0, "filesrc element");
177 gst_filesrc_base_init (gpointer g_class)
179 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
181 gst_element_class_set_details (gstelement_class, &gst_filesrc_details);
184 gst_filesrc_class_init (GstFileSrcClass *klass)
186 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
187 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
189 gobject_class = (GObjectClass*)klass;
191 parent_class = g_type_class_peek_parent (klass);
193 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
194 g_param_spec_int ("fd", "File-descriptor", "File-descriptor for the file being mmap()d",
195 0, G_MAXINT, 0, G_PARAM_READABLE));
196 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOCATION,
197 g_param_spec_string ("location", "File Location", "Location of the file to read",
198 NULL, G_PARAM_READWRITE));
199 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
200 g_param_spec_ulong ("blocksize", "Block size", "Size in bytes to read per buffer",
201 1, G_MAXULONG, DEFAULT_BLOCKSIZE, G_PARAM_READWRITE));
202 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MMAPSIZE,
203 g_param_spec_ulong ("mmapsize", "mmap() Block Size",
204 "Size in bytes of mmap()d regions",
205 0, G_MAXULONG, DEFAULT_MMAPSIZE, G_PARAM_READWRITE));
206 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TOUCH,
207 g_param_spec_boolean ("touch", "Touch read data",
208 "Touch data to force disk read",
209 FALSE, G_PARAM_READWRITE));
211 gobject_class->dispose = gst_filesrc_dispose;
212 gobject_class->set_property = gst_filesrc_set_property;
213 gobject_class->get_property = gst_filesrc_get_property;
215 gstelement_class->change_state = gst_filesrc_change_state;
219 gst_filesrc_bufcmp (gconstpointer a, gconstpointer b)
221 /* GstBuffer *bufa = (GstBuffer *)a, *bufb = (GstBuffer *)b;*/
223 /* sort first by offset, then in reverse by size */
224 if (GST_BUFFER_OFFSET(a) < GST_BUFFER_OFFSET(b)) return -1;
225 else if (GST_BUFFER_OFFSET(a) > GST_BUFFER_OFFSET(b)) return 1;
226 else if (GST_BUFFER_SIZE(a) > GST_BUFFER_SIZE(b)) return -1;
227 else if (GST_BUFFER_SIZE(a) < GST_BUFFER_SIZE(b)) return 1;
232 gst_filesrc_init (GstFileSrc *src)
234 src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
235 gst_pad_set_get_function (src->srcpad, gst_filesrc_get);
236 gst_pad_set_event_function (src->srcpad, gst_filesrc_srcpad_event);
237 gst_pad_set_event_mask_function (src->srcpad, gst_filesrc_get_event_mask);
238 gst_pad_set_query_function (src->srcpad, gst_filesrc_srcpad_query);
239 gst_pad_set_query_type_function (src->srcpad, gst_filesrc_get_query_types);
240 gst_pad_set_formats_function (src->srcpad, gst_filesrc_get_formats);
241 gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
243 src->pagesize = getpagesize();
245 src->filename = NULL;
250 src->block_size = DEFAULT_BLOCKSIZE;
254 src->mapsize = DEFAULT_MMAPSIZE; /* default is 4MB */
256 src->map_regions = g_tree_new (gst_filesrc_bufcmp);
257 src->map_regions_lock = g_mutex_new();
259 src->seek_happened = FALSE;
263 gst_filesrc_dispose (GObject *object)
267 src = GST_FILESRC (object);
269 G_OBJECT_CLASS (parent_class)->dispose (object);
271 g_tree_destroy (src->map_regions);
272 g_mutex_free (src->map_regions_lock);
274 g_free (src->filename);
280 gst_filesrc_set_location (GstFileSrc *src, const gchar *location)
282 /* the element must be stopped in order to do this */
283 if (GST_STATE (src) == GST_STATE_PLAYING)
286 if (src->filename) g_free (src->filename);
287 if (src->uri) g_free (src->uri);
288 /* clear the filename if we get a NULL (is that possible?) */
289 if (location == NULL) {
290 src->filename = NULL;
293 src->filename = g_strdup (location);
294 src->uri = gst_uri_construct ("file", src->filename);
296 g_object_notify (G_OBJECT (src), "location");
297 gst_uri_handler_new_uri (GST_URI_HANDLER (src), src->uri);
303 gst_filesrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
307 /* it's not null if we got it, but it might not be ours */
308 g_return_if_fail (GST_IS_FILESRC (object));
310 src = GST_FILESRC (object);
314 gst_filesrc_set_location (src, g_value_get_string (value));
317 src->block_size = g_value_get_ulong (value);
318 g_object_notify (G_OBJECT (src), "blocksize");
321 if ((src->mapsize % src->pagesize) == 0) {
322 src->mapsize = g_value_get_ulong (value);
323 g_object_notify (G_OBJECT (src), "mmapsize");
325 GST_INFO_OBJECT (src, "invalid mapsize, must a multiple of pagesize, which is %d",
330 src->touch = g_value_get_boolean (value);
331 g_object_notify (G_OBJECT (src), "touch");
339 gst_filesrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
343 /* it's not null if we got it, but it might not be ours */
344 g_return_if_fail (GST_IS_FILESRC (object));
346 src = GST_FILESRC (object);
350 g_value_set_string (value, src->filename);
353 g_value_set_int (value, src->fd);
356 g_value_set_ulong (value, src->block_size);
359 g_value_set_ulong (value, src->mapsize);
362 g_value_set_boolean (value, src->touch);
365 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
371 gst_filesrc_free_parent_mmap (GstBuffer *buf)
373 GstFileSrc *src = GST_FILESRC (GST_BUFFER_POOL_PRIVATE (buf));
375 GST_LOG_OBJECT (src, "freeing mmap()d buffer at %"G_GUINT64_FORMAT"+%u",
376 GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
378 /* remove the buffer from the list of available mmap'd regions */
379 g_mutex_lock (src->map_regions_lock);
380 g_tree_remove (src->map_regions, buf);
381 /* check to see if the tree is empty */
382 if (g_tree_nnodes (src->map_regions) == 0) {
383 /* we have to free the bufferpool we don't have yet */
385 g_mutex_unlock (src->map_regions_lock);
388 /* madvise to tell the kernel what to do with it */
389 madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_DONTNEED);
391 /* now unmap the memory */
392 munmap (GST_BUFFER_DATA (buf), GST_BUFFER_MAXSIZE (buf));
393 /* cast to unsigned long, since there's no gportable way to print
395 GST_LOG_OBJECT (src, "unmapped region %08lx+%08lx at %p",
396 (unsigned long) GST_BUFFER_OFFSET (buf),
397 (unsigned long) GST_BUFFER_MAXSIZE (buf),
398 GST_BUFFER_DATA (buf));
400 GST_BUFFER_DATA (buf) = NULL;
402 g_object_unref (src);
403 gst_buffer_default_free (buf);
407 gst_filesrc_map_region (GstFileSrc *src, off_t offset, size_t size)
413 g_return_val_if_fail (offset >= 0, NULL);
415 GST_LOG_OBJECT (src, "mapping region %08llx+%08lx from file into memory",offset,(unsigned long)size);
416 mmapregion = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
418 if (mmapregion == NULL) {
419 gst_element_error (GST_ELEMENT (src), "couldn't map file");
422 else if (mmapregion == MAP_FAILED) {
423 GST_WARNING_OBJECT (src, "mmap (0x%08lx, %d, 0x%llx) failed: %s",
424 (unsigned long)size, src->fd, offset, strerror (errno));
427 GST_LOG_OBJECT (src, "mapped region %08lx+%08lx from file into memory at %p",
428 (unsigned long)offset, (unsigned long)size, mmapregion);
430 /* time to allocate a new mapbuf */
431 buf = gst_buffer_new ();
432 /* mmap() the data into this new buffer */
433 GST_BUFFER_DATA (buf) = mmapregion;
435 #ifdef MADV_SEQUENTIAL
436 /* madvise to tell the kernel what to do with it */
437 retval = madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_SEQUENTIAL);
439 /* fill in the rest of the fields */
440 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_READONLY);
441 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_ORIGINAL);
442 GST_BUFFER_SIZE (buf) = size;
443 GST_BUFFER_MAXSIZE (buf) = size;
444 GST_BUFFER_OFFSET (buf) = offset;
445 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
446 GST_BUFFER_POOL_PRIVATE (buf) = src;
448 GST_BUFFER_FREE_FUNC (buf) = (GstDataFreeFunction) gst_filesrc_free_parent_mmap;
450 g_mutex_lock (src->map_regions_lock);
451 g_tree_insert (src->map_regions,buf,buf);
452 g_mutex_unlock (src->map_regions_lock);
458 gst_filesrc_map_small_region (GstFileSrc *src, off_t offset, size_t size)
464 /* printf("attempting to map a small buffer at %d+%d\n",offset,size); */
466 /* if the offset starts at a non-page boundary, we have to special case */
467 if ((mod = offset % src->pagesize)) {
470 mapbase = offset - mod;
471 mapsize = ((size + mod + src->pagesize - 1) / src->pagesize) * src->pagesize;
472 /* printf("not on page boundaries, resizing map to %d+%d\n",mapbase,mapsize);*/
473 map = gst_filesrc_map_region(src, mapbase, mapsize);
477 ret = gst_buffer_create_sub (map, offset - mapbase, size);
478 GST_BUFFER_OFFSET (ret) = GST_BUFFER_OFFSET (map) + offset - mapbase;
480 gst_buffer_unref (map);
485 return gst_filesrc_map_region(src,offset,size);
493 /* This allows us to search for a potential mmap region. */
495 gst_filesrc_search_region_match (gpointer a, gpointer b)
497 GstFileSrcRegion *r = (GstFileSrcRegion *)b;
499 /* trying to walk b down the tree, current node is a */
500 if (r->offset < GST_BUFFER_OFFSET(a)) return -1;
501 else if (r->offset >= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 1;
502 else if ((r->offset + r->size) <= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 0;
508 * gst_filesrc_get_mmap:
509 * @pad: #GstPad to push a buffer from
511 * Push a new buffer from the filesrc at the current offset.
514 gst_filesrc_get_mmap (GstFileSrc *src)
516 GstBuffer *buf = NULL, *map;
517 size_t readsize, mapsize;
518 off_t readend,mapstart,mapend;
519 GstFileSrcRegion region;
522 /* calculate end pointers so we don't have to do so repeatedly later */
523 readsize = src->block_size;
524 readend = src->curoffset + src->block_size; /* note this is the byte *after* the read */
525 mapstart = GST_BUFFER_OFFSET (src->mapbuf);
526 mapsize = GST_BUFFER_SIZE (src->mapbuf);
527 mapend = mapstart + mapsize; /* note this is the byte *after* the map */
529 /* check to see if we're going to overflow the end of the file */
530 if (readend > src->filelen) {
531 if (!gst_filesrc_check_filesize (src) || readend > src->filelen) {
532 readsize = src->filelen - src->curoffset;
533 readend = src->curoffset + readsize;
537 GST_LOG ("attempting to read %08lx, %08lx, %08lx, %08lx",
538 (unsigned long)readsize, (unsigned long)readend,
539 (unsigned long)mapstart, (unsigned long)mapend);
541 /* if the start is past the mapstart */
542 if (src->curoffset >= mapstart) {
543 /* if the end is before the mapend, the buffer is in current mmap region... */
544 /* ('cause by definition if readend is in the buffer, so's readstart) */
545 if (readend <= mapend) {
546 GST_LOG_OBJECT (src, "read buf %llu+%d lives in current mapbuf %lld+%d, creating subbuffer of mapbuf",
547 src->curoffset, readsize, mapstart, mapsize);
548 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - mapstart,
550 GST_BUFFER_OFFSET (buf) = src->curoffset;
552 /* if the start actually is within the current mmap region, map an overlap buffer */
553 } else if (src->curoffset < mapend) {
554 GST_LOG_OBJECT (src, "read buf %llu+%d starts in mapbuf %d+%d but ends outside, creating new mmap",
555 (unsigned long long) src->curoffset, (gint) readsize, (gint) mapstart, (gint) mapsize);
556 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
561 /* the only other option is that buffer is totally outside, which means we search for it */
563 /* now we can assume that the start is *before* the current mmap region */
564 /* if the readend is past mapstart, we have two options */
565 } else if (readend >= mapstart) {
566 /* either the read buffer overlaps the start of the mmap region */
567 /* or the read buffer fully contains the current mmap region */
568 /* either way, it's really not relevant, we just create a new region anyway*/
569 GST_LOG_OBJECT (src, "read buf %llu+%d starts before mapbuf %d+%d, but overlaps it",
570 (unsigned long long) src->curoffset, (gint) readsize, (gint) mapstart, (gint) mapsize);
571 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
576 /* then deal with the case where the read buffer is totally outside */
578 /* first check to see if there's a map that covers the right region already */
579 GST_LOG_OBJECT (src, "searching for mapbuf to cover %llu+%d",src->curoffset,readsize);
580 region.offset = src->curoffset;
581 region.size = readsize;
582 map = g_tree_search (src->map_regions,
583 (GCompareFunc) gst_filesrc_search_region_match,
586 /* if we found an exact match, subbuffer it */
588 GST_LOG_OBJECT (src, "found mapbuf at %"G_GUINT64_FORMAT"+%u, creating subbuffer",
589 GST_BUFFER_OFFSET (map), GST_BUFFER_SIZE (map));
590 buf = gst_buffer_create_sub (map, src->curoffset - GST_BUFFER_OFFSET(map), readsize);
591 GST_BUFFER_OFFSET (buf) = src->curoffset;
593 /* otherwise we need to create something out of thin air */
595 /* if the read buffer crosses a mmap region boundary, create a one-off region */
596 if ((src->curoffset / src->mapsize) != (readend / src->mapsize)) {
597 GST_LOG_OBJECT (src, "read buf %llu+%d crosses a %d-byte boundary, creating a one-off",
598 src->curoffset,readsize,src->mapsize);
599 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
603 /* otherwise we will create a new mmap region and set it to the default */
607 off_t nextmap = src->curoffset - (src->curoffset % src->mapsize);
608 GST_LOG_OBJECT (src, "read buf %llu+%d in new mapbuf at %llu+%d, mapping and subbuffering",
609 src->curoffset, readsize, nextmap, src->mapsize);
610 /* first, we're done with the old mapbuf */
611 gst_buffer_unref(src->mapbuf);
612 mapsize = src->mapsize;
614 /* double the mapsize as long as the readsize is smaller */
615 while (readsize - (src->curoffset - nextmap) > mapsize) {
616 GST_LOG_OBJECT (src, "readsize smaller then mapsize %08x %d", readsize, mapsize);
619 /* create a new one */
620 src->mapbuf = gst_filesrc_map_region (src, nextmap, mapsize);
621 if (src->mapbuf == NULL)
625 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - nextmap, readsize);
626 GST_BUFFER_OFFSET (buf) = GST_BUFFER_OFFSET (src->mapbuf) + src->curoffset - nextmap;
631 /* if we need to touch the buffer (to bring it into memory), do so */
633 volatile guchar *p = GST_BUFFER_DATA (buf), c;
635 for (i=0; i < GST_BUFFER_SIZE (buf); i += src->pagesize)
639 /* we're done, return the buffer */
640 g_assert (src->curoffset == GST_BUFFER_OFFSET (buf));
641 src->curoffset += GST_BUFFER_SIZE(buf);
646 gst_filesrc_get_read (GstFileSrc *src)
648 GstBuffer *buf = NULL;
652 readsize = src->block_size;
653 if (src->curoffset + readsize > src->filelen) {
654 if (!gst_filesrc_check_filesize (src) || src->curoffset + readsize > src->filelen) {
655 readsize = src->filelen - src->curoffset;
659 buf = gst_buffer_new_and_alloc (readsize);
660 g_return_val_if_fail (buf != NULL, NULL);
662 ret = read (src->fd, GST_BUFFER_DATA (buf), readsize);
664 gst_element_error (GST_ELEMENT (src), "reading file (%s)",
665 strerror (errno), NULL);
668 if (ret < readsize) {
669 gst_element_error (GST_ELEMENT (src), "unexpected end of file", NULL);
673 src->curoffset += readsize;
679 gst_filesrc_get (GstPad *pad)
683 g_return_val_if_fail (pad != NULL, NULL);
684 src = GST_FILESRC (gst_pad_get_parent (pad));
685 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), NULL);
688 if (src->seek_happened) {
691 src->seek_happened = FALSE;
692 GST_DEBUG_OBJECT (src, "sending discont");
693 event = gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, src->curoffset, NULL);
694 src->need_flush = FALSE;
695 return GST_DATA (event);
697 /* check for flush */
698 if (src->need_flush) {
699 src->need_flush = FALSE;
700 GST_DEBUG_OBJECT (src, "sending flush");
701 return GST_DATA (gst_event_new_flush ());
705 g_assert (src->curoffset <= src->filelen);
706 if (src->curoffset == src->filelen) {
707 if (!gst_filesrc_check_filesize (src) || src->curoffset >= src->filelen) {
708 GST_DEBUG_OBJECT (src, "eos %" G_GINT64_FORMAT" %" G_GINT64_FORMAT,
709 src->curoffset, src->filelen);
710 gst_element_set_eos (GST_ELEMENT (src));
711 return GST_DATA (gst_event_new (GST_EVENT_EOS));
715 if (src->using_mmap){
716 return GST_DATA (gst_filesrc_get_mmap (src));
718 return GST_DATA (gst_filesrc_get_read (src));
722 /* TRUE if the filesize of the file was updated */
724 gst_filesrc_check_filesize (GstFileSrc *src)
726 struct stat stat_results;
728 g_return_val_if_fail (GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
730 fstat(src->fd, &stat_results);
731 GST_DEBUG_OBJECT (src, "checked filesize on %s (was %"G_GUINT64_FORMAT", is %"G_GUINT64_FORMAT")",
732 src->filename, src->filelen, (guint64) stat_results.st_size);
733 if (src->filelen == (guint64) stat_results.st_size)
735 src->filelen = stat_results.st_size;
738 /* open the file and mmap it, necessary to go to READY state */
740 gst_filesrc_open_file (GstFileSrc *src)
742 g_return_val_if_fail (!GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
744 GST_INFO_OBJECT (src, "opening file %s",src->filename);
747 src->fd = open (src->filename, O_RDONLY);
749 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" (%s)",
750 src->filename, strerror (errno), NULL);
753 /* check if it is a regular file, otherwise bail out */
754 struct stat stat_results;
756 fstat(src->fd, &stat_results);
758 if (!S_ISREG(stat_results.st_mode)) {
759 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" failed. it isn't a regular file",
760 src->filename, NULL);
765 /* find the file length */
766 src->filelen = stat_results.st_size;
768 /* allocate the first mmap'd region */
769 src->mapbuf = gst_filesrc_map_region (src, 0, src->mapsize);
770 if (src->mapbuf == NULL) {
771 src->using_mmap = FALSE;
773 src->using_mmap = TRUE;
778 GST_FLAG_SET (src, GST_FILESRC_OPEN);
783 /* unmap and close the file */
785 gst_filesrc_close_file (GstFileSrc *src)
787 g_return_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN));
792 /* zero out a lot of our state */
798 gst_buffer_unref (src->mapbuf);
802 GST_FLAG_UNSET (src, GST_FILESRC_OPEN);
806 static GstElementStateReturn
807 gst_filesrc_change_state (GstElement *element)
809 GstFileSrc *src = GST_FILESRC(element);
811 switch (GST_STATE_TRANSITION (element)) {
812 case GST_STATE_NULL_TO_READY:
814 case GST_STATE_READY_TO_NULL:
816 case GST_STATE_READY_TO_PAUSED:
817 if (!GST_FLAG_IS_SET (element, GST_FILESRC_OPEN)) {
818 if (!gst_filesrc_open_file (GST_FILESRC (element)))
819 return GST_STATE_FAILURE;
822 case GST_STATE_PAUSED_TO_READY:
823 if (GST_FLAG_IS_SET (element, GST_FILESRC_OPEN))
824 gst_filesrc_close_file (GST_FILESRC (element));
825 src->seek_happened = TRUE;
831 if (GST_ELEMENT_CLASS (parent_class)->change_state)
832 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
834 return GST_STATE_SUCCESS;
838 gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
839 GstFormat *format, gint64 *value)
841 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
844 case GST_QUERY_TOTAL:
845 if (*format != GST_FORMAT_BYTES) {
848 gst_filesrc_check_filesize (src);
849 *value = src->filelen;
851 case GST_QUERY_POSITION:
853 case GST_FORMAT_BYTES:
854 *value = src->curoffset;
856 case GST_FORMAT_PERCENT:
857 if (src->filelen == 0)
859 *value = src->curoffset * GST_FORMAT_PERCENT_MAX / src->filelen;
873 gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
875 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
877 GST_DEBUG_OBJECT (src, "event %d", GST_EVENT_TYPE (event));
879 switch (GST_EVENT_TYPE (event)) {
884 if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_BYTES) {
888 offset = GST_EVENT_SEEK_OFFSET (event);
890 switch (GST_EVENT_SEEK_METHOD (event)) {
891 case GST_SEEK_METHOD_SET:
892 if (offset > src->filelen && (!gst_filesrc_check_filesize (src) || offset > src->filelen)) {
895 src->curoffset = offset;
896 GST_DEBUG_OBJECT (src, "seek set pending to %" G_GINT64_FORMAT, src->curoffset);
898 case GST_SEEK_METHOD_CUR:
899 if (offset + src->curoffset > src->filelen)
900 if (!gst_filesrc_check_filesize (src) || offset + src->curoffset > src->filelen)
902 src->curoffset += offset;
903 GST_DEBUG_OBJECT (src, "seek cur pending to %" G_GINT64_FORMAT, src->curoffset);
905 case GST_SEEK_METHOD_END:
906 if (ABS (offset) > src->filelen) {
907 if (!gst_filesrc_check_filesize (src) || ABS (offset) > src->filelen)
911 src->curoffset = src->filelen - ABS (offset);
912 GST_DEBUG_OBJECT (src, "seek end pending to %" G_GINT64_FORMAT, src->curoffset);
918 src->seek_happened = TRUE;
919 src->need_flush = GST_EVENT_SEEK_FLAGS(event) & GST_SEEK_FLAG_FLUSH;
923 if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
926 src->block_size = GST_EVENT_SIZE_VALUE (event);
927 g_object_notify (G_OBJECT (src), "blocksize");
929 case GST_EVENT_FLUSH:
930 src->need_flush = TRUE;
936 gst_event_unref (event);
940 gst_event_unref (event);
944 /*** GSTURIHANDLER INTERFACE *************************************************/
947 gst_filesrc_uri_get_type (void)
952 gst_filesrc_uri_get_protocols(void)
954 static gchar *protocols[] = {"file", NULL};
958 gst_filesrc_uri_get_uri (GstURIHandler *handler)
960 GstFileSrc *src = GST_FILESRC (handler);
965 gst_filesrc_uri_set_uri (GstURIHandler *handler, const gchar *uri)
967 gchar *protocol, *location;
969 GstFileSrc *src = GST_FILESRC (handler);
971 protocol = gst_uri_get_protocol (uri);
972 if (strcmp (protocol, "file") != 0) {
977 location = gst_uri_get_location (uri);
978 ret = gst_filesrc_set_location (src, location);
985 gst_filesrc_uri_handler_init (gpointer g_iface, gpointer iface_data)
987 GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
989 iface->get_type = gst_filesrc_uri_get_type;
990 iface->get_protocols = gst_filesrc_uri_get_protocols;
991 iface->get_uri = gst_filesrc_uri_get_uri;
992 iface->set_uri = gst_filesrc_uri_set_uri;