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_dispose (GObject *object);
123 static void gst_filesrc_set_property (GObject *object, guint prop_id,
124 const GValue *value, GParamSpec *pspec);
125 static void gst_filesrc_get_property (GObject *object, guint prop_id,
126 GValue *value, GParamSpec *pspec);
128 static gboolean gst_filesrc_check_filesize (GstFileSrc *src);
129 static GstData * gst_filesrc_get (GstPad *pad);
130 static gboolean gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event);
131 static gboolean gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
132 GstFormat *format, gint64 *value);
134 static GstElementStateReturn gst_filesrc_change_state (GstElement *element);
136 static void gst_filesrc_uri_handler_init (gpointer g_iface, gpointer iface_data);
139 _do_init (GType filesrc_type)
141 static const GInterfaceInfo urihandler_info = {
142 gst_filesrc_uri_handler_init,
146 g_type_add_interface_static (filesrc_type, GST_TYPE_URI_HANDLER, &urihandler_info);
147 GST_DEBUG_CATEGORY_INIT (gst_filesrc_debug, "filesrc", 0, "filesrc element");
150 GST_BOILERPLATE_FULL (GstFileSrc, gst_filesrc, GstElement, GST_TYPE_ELEMENT, _do_init);
153 gst_filesrc_base_init (gpointer g_class)
155 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
157 gst_element_class_set_details (gstelement_class, &gst_filesrc_details);
160 gst_filesrc_class_init (GstFileSrcClass *klass)
162 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
163 GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
165 gobject_class = (GObjectClass*)klass;
168 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
169 g_param_spec_int ("fd", "File-descriptor", "File-descriptor for the file being mmap()d",
170 0, G_MAXINT, 0, G_PARAM_READABLE));
171 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOCATION,
172 g_param_spec_string ("location", "File Location", "Location of the file to read",
173 NULL, G_PARAM_READWRITE));
174 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
175 g_param_spec_ulong ("blocksize", "Block size", "Size in bytes to read per buffer",
176 1, G_MAXULONG, DEFAULT_BLOCKSIZE, G_PARAM_READWRITE));
177 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MMAPSIZE,
178 g_param_spec_ulong ("mmapsize", "mmap() Block Size",
179 "Size in bytes of mmap()d regions",
180 0, G_MAXULONG, DEFAULT_MMAPSIZE, G_PARAM_READWRITE));
181 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TOUCH,
182 g_param_spec_boolean ("touch", "Touch read data",
183 "Touch data to force disk read",
184 FALSE, G_PARAM_READWRITE));
186 gobject_class->dispose = gst_filesrc_dispose;
187 gobject_class->set_property = gst_filesrc_set_property;
188 gobject_class->get_property = gst_filesrc_get_property;
190 gstelement_class->change_state = gst_filesrc_change_state;
194 gst_filesrc_bufcmp (gconstpointer a, gconstpointer b)
196 /* GstBuffer *bufa = (GstBuffer *)a, *bufb = (GstBuffer *)b;*/
198 /* sort first by offset, then in reverse by size */
199 if (GST_BUFFER_OFFSET(a) < GST_BUFFER_OFFSET(b)) return -1;
200 else if (GST_BUFFER_OFFSET(a) > GST_BUFFER_OFFSET(b)) return 1;
201 else if (GST_BUFFER_SIZE(a) > GST_BUFFER_SIZE(b)) return -1;
202 else if (GST_BUFFER_SIZE(a) < GST_BUFFER_SIZE(b)) return 1;
207 gst_filesrc_init (GstFileSrc *src)
209 src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
210 gst_pad_set_get_function (src->srcpad, gst_filesrc_get);
211 gst_pad_set_event_function (src->srcpad, gst_filesrc_srcpad_event);
212 gst_pad_set_event_mask_function (src->srcpad, gst_filesrc_get_event_mask);
213 gst_pad_set_query_function (src->srcpad, gst_filesrc_srcpad_query);
214 gst_pad_set_query_type_function (src->srcpad, gst_filesrc_get_query_types);
215 gst_pad_set_formats_function (src->srcpad, gst_filesrc_get_formats);
216 gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
218 src->pagesize = getpagesize();
220 src->filename = NULL;
225 src->block_size = DEFAULT_BLOCKSIZE;
229 src->mapsize = DEFAULT_MMAPSIZE; /* default is 4MB */
231 src->map_regions = g_tree_new (gst_filesrc_bufcmp);
232 src->map_regions_lock = g_mutex_new();
234 src->seek_happened = FALSE;
238 gst_filesrc_dispose (GObject *object)
242 src = GST_FILESRC (object);
244 G_OBJECT_CLASS (parent_class)->dispose (object);
246 g_tree_destroy (src->map_regions);
247 g_mutex_free (src->map_regions_lock);
249 g_free (src->filename);
255 gst_filesrc_set_location (GstFileSrc *src, const gchar *location)
257 /* the element must be stopped in order to do this */
258 if (GST_STATE (src) == GST_STATE_PLAYING)
261 if (src->filename) g_free (src->filename);
262 if (src->uri) g_free (src->uri);
263 /* clear the filename if we get a NULL (is that possible?) */
264 if (location == NULL) {
265 src->filename = NULL;
268 src->filename = g_strdup (location);
269 src->uri = gst_uri_construct ("file", src->filename);
271 g_object_notify (G_OBJECT (src), "location");
272 gst_uri_handler_new_uri (GST_URI_HANDLER (src), src->uri);
278 gst_filesrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
282 /* it's not null if we got it, but it might not be ours */
283 g_return_if_fail (GST_IS_FILESRC (object));
285 src = GST_FILESRC (object);
289 gst_filesrc_set_location (src, g_value_get_string (value));
292 src->block_size = g_value_get_ulong (value);
293 g_object_notify (G_OBJECT (src), "blocksize");
296 if ((src->mapsize % src->pagesize) == 0) {
297 src->mapsize = g_value_get_ulong (value);
298 g_object_notify (G_OBJECT (src), "mmapsize");
300 GST_INFO_OBJECT (src, "invalid mapsize, must a multiple of pagesize, which is %d",
305 src->touch = g_value_get_boolean (value);
306 g_object_notify (G_OBJECT (src), "touch");
314 gst_filesrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
318 /* it's not null if we got it, but it might not be ours */
319 g_return_if_fail (GST_IS_FILESRC (object));
321 src = GST_FILESRC (object);
325 g_value_set_string (value, src->filename);
328 g_value_set_int (value, src->fd);
331 g_value_set_ulong (value, src->block_size);
334 g_value_set_ulong (value, src->mapsize);
337 g_value_set_boolean (value, src->touch);
340 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
346 gst_filesrc_free_parent_mmap (GstBuffer *buf)
348 GstFileSrc *src = GST_FILESRC (GST_BUFFER_PRIVATE (buf));
350 GST_LOG_OBJECT (src, "freeing mmap()d buffer at %"G_GUINT64_FORMAT"+%u",
351 GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
353 /* remove the buffer from the list of available mmap'd regions */
354 g_mutex_lock (src->map_regions_lock);
355 g_tree_remove (src->map_regions, buf);
356 /* check to see if the tree is empty */
357 if (g_tree_nnodes (src->map_regions) == 0) {
358 /* we have to free the bufferpool we don't have yet */
360 g_mutex_unlock (src->map_regions_lock);
363 /* madvise to tell the kernel what to do with it */
364 madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_DONTNEED);
366 /* now unmap the memory */
367 munmap (GST_BUFFER_DATA (buf), GST_BUFFER_MAXSIZE (buf));
368 /* cast to unsigned long, since there's no gportable way to print
370 GST_LOG_OBJECT (src, "unmapped region %08lx+%08lx at %p",
371 (unsigned long) GST_BUFFER_OFFSET (buf),
372 (unsigned long) GST_BUFFER_MAXSIZE (buf),
373 GST_BUFFER_DATA (buf));
375 GST_BUFFER_DATA (buf) = NULL;
377 g_object_unref (src);
378 gst_buffer_default_free (buf);
382 gst_filesrc_map_region (GstFileSrc *src, off_t offset, size_t size)
388 g_return_val_if_fail (offset >= 0, NULL);
390 GST_LOG_OBJECT (src, "mapping region %08llx+%08lx from file into memory",offset,(unsigned long)size);
391 mmapregion = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
393 if (mmapregion == NULL) {
394 gst_element_error (GST_ELEMENT (src), "couldn't map file");
397 else if (mmapregion == MAP_FAILED) {
398 GST_WARNING_OBJECT (src, "mmap (0x%08lx, %d, 0x%llx) failed: %s",
399 (unsigned long)size, src->fd, offset, strerror (errno));
402 GST_LOG_OBJECT (src, "mapped region %08lx+%08lx from file into memory at %p",
403 (unsigned long)offset, (unsigned long)size, mmapregion);
405 /* time to allocate a new mapbuf */
406 buf = gst_buffer_new ();
407 /* mmap() the data into this new buffer */
408 GST_BUFFER_DATA (buf) = mmapregion;
410 #ifdef MADV_SEQUENTIAL
411 /* madvise to tell the kernel what to do with it */
412 retval = madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_SEQUENTIAL);
414 /* fill in the rest of the fields */
415 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_READONLY);
416 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_ORIGINAL);
417 GST_BUFFER_SIZE (buf) = size;
418 GST_BUFFER_MAXSIZE (buf) = size;
419 GST_BUFFER_OFFSET (buf) = offset;
420 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
421 GST_BUFFER_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;
483 * gst_filesrc_get_mmap:
484 * @pad: #GstPad to push a buffer from
486 * Push a new buffer from the filesrc at the current offset.
489 gst_filesrc_get_mmap (GstFileSrc *src)
491 GstBuffer *buf = NULL, *map;
492 size_t readsize, mapsize;
493 off_t readend,mapstart,mapend;
494 GstFileSrcRegion region;
497 /* calculate end pointers so we don't have to do so repeatedly later */
498 readsize = src->block_size;
499 readend = src->curoffset + src->block_size; /* note this is the byte *after* the read */
500 mapstart = GST_BUFFER_OFFSET (src->mapbuf);
501 mapsize = GST_BUFFER_SIZE (src->mapbuf);
502 mapend = mapstart + mapsize; /* note this is the byte *after* the map */
504 /* check to see if we're going to overflow the end of the file */
505 if (readend > src->filelen) {
506 if (!gst_filesrc_check_filesize (src) || readend > src->filelen) {
507 readsize = src->filelen - src->curoffset;
508 readend = src->curoffset + readsize;
512 GST_LOG ("attempting to read %08lx, %08lx, %08lx, %08lx",
513 (unsigned long)readsize, (unsigned long)readend,
514 (unsigned long)mapstart, (unsigned long)mapend);
516 /* if the start is past the mapstart */
517 if (src->curoffset >= mapstart) {
518 /* if the end is before the mapend, the buffer is in current mmap region... */
519 /* ('cause by definition if readend is in the buffer, so's readstart) */
520 if (readend <= mapend) {
521 GST_LOG_OBJECT (src, "read buf %llu+%d lives in current mapbuf %lld+%d, creating subbuffer of mapbuf",
522 src->curoffset, readsize, mapstart, mapsize);
523 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - mapstart,
525 GST_BUFFER_OFFSET (buf) = src->curoffset;
527 /* if the start actually is within the current mmap region, map an overlap buffer */
528 } else if (src->curoffset < mapend) {
529 GST_LOG_OBJECT (src, "read buf %llu+%d starts in mapbuf %d+%d but ends outside, creating new mmap",
530 (unsigned long long) src->curoffset, (gint) readsize, (gint) mapstart, (gint) mapsize);
531 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
536 /* the only other option is that buffer is totally outside, which means we search for it */
538 /* now we can assume that the start is *before* the current mmap region */
539 /* if the readend is past mapstart, we have two options */
540 } else if (readend >= mapstart) {
541 /* either the read buffer overlaps the start of the mmap region */
542 /* or the read buffer fully contains the current mmap region */
543 /* either way, it's really not relevant, we just create a new region anyway*/
544 GST_LOG_OBJECT (src, "read buf %llu+%d starts before mapbuf %d+%d, but overlaps it",
545 (unsigned long long) src->curoffset, (gint) readsize, (gint) mapstart, (gint) mapsize);
546 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
551 /* then deal with the case where the read buffer is totally outside */
553 /* first check to see if there's a map that covers the right region already */
554 GST_LOG_OBJECT (src, "searching for mapbuf to cover %llu+%d",src->curoffset,readsize);
555 region.offset = src->curoffset;
556 region.size = readsize;
557 map = g_tree_search (src->map_regions,
558 (GCompareFunc) gst_filesrc_search_region_match,
561 /* if we found an exact match, subbuffer it */
563 GST_LOG_OBJECT (src, "found mapbuf at %"G_GUINT64_FORMAT"+%u, creating subbuffer",
564 GST_BUFFER_OFFSET (map), GST_BUFFER_SIZE (map));
565 buf = gst_buffer_create_sub (map, src->curoffset - GST_BUFFER_OFFSET(map), readsize);
566 GST_BUFFER_OFFSET (buf) = src->curoffset;
568 /* otherwise we need to create something out of thin air */
570 /* if the read buffer crosses a mmap region boundary, create a one-off region */
571 if ((src->curoffset / src->mapsize) != (readend / src->mapsize)) {
572 GST_LOG_OBJECT (src, "read buf %llu+%d crosses a %d-byte boundary, creating a one-off",
573 src->curoffset,readsize,src->mapsize);
574 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
578 /* otherwise we will create a new mmap region and set it to the default */
582 off_t nextmap = src->curoffset - (src->curoffset % src->mapsize);
583 GST_LOG_OBJECT (src, "read buf %llu+%d in new mapbuf at %llu+%d, mapping and subbuffering",
584 src->curoffset, readsize, nextmap, src->mapsize);
585 /* first, we're done with the old mapbuf */
586 gst_buffer_unref(src->mapbuf);
587 mapsize = src->mapsize;
589 /* double the mapsize as long as the readsize is smaller */
590 while (readsize - (src->curoffset - nextmap) > mapsize) {
591 GST_LOG_OBJECT (src, "readsize smaller then mapsize %08x %d", readsize, mapsize);
594 /* create a new one */
595 src->mapbuf = gst_filesrc_map_region (src, nextmap, mapsize);
596 if (src->mapbuf == NULL)
600 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - nextmap, readsize);
601 GST_BUFFER_OFFSET (buf) = GST_BUFFER_OFFSET (src->mapbuf) + src->curoffset - nextmap;
606 /* if we need to touch the buffer (to bring it into memory), do so */
608 volatile guchar *p = GST_BUFFER_DATA (buf), c;
610 for (i=0; i < GST_BUFFER_SIZE (buf); i += src->pagesize)
614 /* we're done, return the buffer */
615 g_assert (src->curoffset == GST_BUFFER_OFFSET (buf));
616 src->curoffset += GST_BUFFER_SIZE(buf);
621 gst_filesrc_get_read (GstFileSrc *src)
623 GstBuffer *buf = NULL;
627 readsize = src->block_size;
628 if (src->curoffset + readsize > src->filelen) {
629 if (!gst_filesrc_check_filesize (src) || src->curoffset + readsize > src->filelen) {
630 readsize = src->filelen - src->curoffset;
634 buf = gst_buffer_new_and_alloc (readsize);
635 g_return_val_if_fail (buf != NULL, NULL);
637 ret = read (src->fd, GST_BUFFER_DATA (buf), readsize);
639 gst_element_error (GST_ELEMENT (src), "reading file (%s)",
640 strerror (errno), NULL);
643 if (ret < readsize) {
644 gst_element_error (GST_ELEMENT (src), "unexpected end of file", NULL);
648 src->curoffset += readsize;
654 gst_filesrc_get (GstPad *pad)
658 g_return_val_if_fail (pad != NULL, NULL);
659 src = GST_FILESRC (gst_pad_get_parent (pad));
660 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), NULL);
663 if (src->seek_happened) {
666 src->seek_happened = FALSE;
667 GST_DEBUG_OBJECT (src, "sending discont");
668 event = gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, src->curoffset, NULL);
669 src->need_flush = FALSE;
670 return GST_DATA (event);
672 /* check for flush */
673 if (src->need_flush) {
674 src->need_flush = FALSE;
675 GST_DEBUG_OBJECT (src, "sending flush");
676 return GST_DATA (gst_event_new_flush ());
680 g_assert (src->curoffset <= src->filelen);
681 if (src->curoffset == src->filelen) {
682 if (!gst_filesrc_check_filesize (src) || src->curoffset >= src->filelen) {
683 GST_DEBUG_OBJECT (src, "eos %" G_GINT64_FORMAT" %" G_GINT64_FORMAT,
684 src->curoffset, src->filelen);
685 gst_element_set_eos (GST_ELEMENT (src));
686 return GST_DATA (gst_event_new (GST_EVENT_EOS));
690 if (src->using_mmap){
691 return GST_DATA (gst_filesrc_get_mmap (src));
693 return GST_DATA (gst_filesrc_get_read (src));
697 /* TRUE if the filesize of the file was updated */
699 gst_filesrc_check_filesize (GstFileSrc *src)
701 struct stat stat_results;
703 g_return_val_if_fail (GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
705 fstat(src->fd, &stat_results);
706 GST_DEBUG_OBJECT (src, "checked filesize on %s (was %"G_GUINT64_FORMAT", is %"G_GUINT64_FORMAT")",
707 src->filename, src->filelen, (guint64) stat_results.st_size);
708 if (src->filelen == (guint64) stat_results.st_size)
710 src->filelen = stat_results.st_size;
713 /* open the file and mmap it, necessary to go to READY state */
715 gst_filesrc_open_file (GstFileSrc *src)
717 g_return_val_if_fail (!GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
719 GST_INFO_OBJECT (src, "opening file %s",src->filename);
722 src->fd = open (src->filename, O_RDONLY);
724 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" (%s)",
725 src->filename, strerror (errno), NULL);
728 /* check if it is a regular file, otherwise bail out */
729 struct stat stat_results;
731 fstat(src->fd, &stat_results);
733 if (!S_ISREG(stat_results.st_mode)) {
734 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" failed. it isn't a regular file",
735 src->filename, NULL);
740 /* find the file length */
741 src->filelen = stat_results.st_size;
743 /* allocate the first mmap'd region */
744 src->mapbuf = gst_filesrc_map_region (src, 0, src->mapsize);
745 if (src->mapbuf == NULL) {
746 src->using_mmap = FALSE;
748 src->using_mmap = TRUE;
753 GST_FLAG_SET (src, GST_FILESRC_OPEN);
758 /* unmap and close the file */
760 gst_filesrc_close_file (GstFileSrc *src)
762 g_return_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN));
767 /* zero out a lot of our state */
773 gst_buffer_unref (src->mapbuf);
777 GST_FLAG_UNSET (src, GST_FILESRC_OPEN);
781 static GstElementStateReturn
782 gst_filesrc_change_state (GstElement *element)
784 GstFileSrc *src = GST_FILESRC(element);
786 switch (GST_STATE_TRANSITION (element)) {
787 case GST_STATE_NULL_TO_READY:
789 case GST_STATE_READY_TO_NULL:
791 case GST_STATE_READY_TO_PAUSED:
792 if (!GST_FLAG_IS_SET (element, GST_FILESRC_OPEN)) {
793 if (!gst_filesrc_open_file (GST_FILESRC (element)))
794 return GST_STATE_FAILURE;
797 case GST_STATE_PAUSED_TO_READY:
798 if (GST_FLAG_IS_SET (element, GST_FILESRC_OPEN))
799 gst_filesrc_close_file (GST_FILESRC (element));
800 src->seek_happened = TRUE;
806 if (GST_ELEMENT_CLASS (parent_class)->change_state)
807 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
809 return GST_STATE_SUCCESS;
813 gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
814 GstFormat *format, gint64 *value)
816 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
819 case GST_QUERY_TOTAL:
820 if (*format != GST_FORMAT_BYTES) {
823 gst_filesrc_check_filesize (src);
824 *value = src->filelen;
826 case GST_QUERY_POSITION:
828 case GST_FORMAT_BYTES:
829 *value = src->curoffset;
831 case GST_FORMAT_PERCENT:
832 if (src->filelen == 0)
834 *value = src->curoffset * GST_FORMAT_PERCENT_MAX / src->filelen;
848 gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
850 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
852 GST_DEBUG_OBJECT (src, "event %d", GST_EVENT_TYPE (event));
854 switch (GST_EVENT_TYPE (event)) {
859 if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_BYTES) {
863 offset = GST_EVENT_SEEK_OFFSET (event);
865 switch (GST_EVENT_SEEK_METHOD (event)) {
866 case GST_SEEK_METHOD_SET:
867 if (offset > src->filelen && (!gst_filesrc_check_filesize (src) || offset > src->filelen)) {
870 src->curoffset = offset;
871 GST_DEBUG_OBJECT (src, "seek set pending to %" G_GINT64_FORMAT, src->curoffset);
873 case GST_SEEK_METHOD_CUR:
874 if (offset + src->curoffset > src->filelen)
875 if (!gst_filesrc_check_filesize (src) || offset + src->curoffset > src->filelen)
877 src->curoffset += offset;
878 GST_DEBUG_OBJECT (src, "seek cur pending to %" G_GINT64_FORMAT, src->curoffset);
880 case GST_SEEK_METHOD_END:
881 if (ABS (offset) > src->filelen) {
882 if (!gst_filesrc_check_filesize (src) || ABS (offset) > src->filelen)
886 src->curoffset = src->filelen - ABS (offset);
887 GST_DEBUG_OBJECT (src, "seek end pending to %" G_GINT64_FORMAT, src->curoffset);
893 src->seek_happened = TRUE;
894 src->need_flush = GST_EVENT_SEEK_FLAGS(event) & GST_SEEK_FLAG_FLUSH;
898 if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
901 src->block_size = GST_EVENT_SIZE_VALUE (event);
902 g_object_notify (G_OBJECT (src), "blocksize");
904 case GST_EVENT_FLUSH:
905 src->need_flush = TRUE;
911 gst_event_unref (event);
915 gst_event_unref (event);
919 /*** GSTURIHANDLER INTERFACE *************************************************/
922 gst_filesrc_uri_get_type (void)
927 gst_filesrc_uri_get_protocols(void)
929 static gchar *protocols[] = {"file", NULL};
933 gst_filesrc_uri_get_uri (GstURIHandler *handler)
935 GstFileSrc *src = GST_FILESRC (handler);
940 gst_filesrc_uri_set_uri (GstURIHandler *handler, const gchar *uri)
942 gchar *protocol, *location;
944 GstFileSrc *src = GST_FILESRC (handler);
946 protocol = gst_uri_get_protocol (uri);
947 if (strcmp (protocol, "file") != 0) {
952 location = gst_uri_get_location (uri);
953 ret = gst_filesrc_set_location (src, location);
960 gst_filesrc_uri_handler_init (gpointer g_iface, gpointer iface_data)
962 GstURIHandlerInterface *iface = (GstURIHandlerInterface *) g_iface;
964 iface->get_type = gst_filesrc_uri_get_type;
965 iface->get_protocols = gst_filesrc_uri_get_protocols;
966 iface->get_uri = gst_filesrc_uri_get_uri;
967 iface->set_uri = gst_filesrc_uri_set_uri;