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.
26 #include "gst/gst_private.h"
29 #include "gstfilesrc.h"
40 /**********************************************************************
41 * GStreamer Default File Source
44 * This source uses mmap(2) to efficiently load data from a file.
45 * To do this without seriously polluting the applications' memory
46 * space, it must do so in smaller chunks, say 1-4MB at a time.
47 * Buffers are then subdivided from these mmap'd chunks, to directly
48 * make use of the mmap.
50 * To handle refcounting so that the mmap can be freed at the appropriate
51 * time, a buffer will be created for each mmap'd region, and all new
52 * buffers will be sub-buffers of this top-level buffer. As they are
53 * freed, the refcount goes down on the mmap'd buffer and its free()
54 * function is called, which will call munmap(2) on itself.
56 * If a buffer happens to cross the boundaries of an mmap'd region, we
57 * have to decide whether it's more efficient to copy the data into a
58 * new buffer, or mmap() just that buffer. There will have to be a
59 * breakpoint size to determine which will be done. The mmap() size
60 * has a lot to do with this as well, because you end up in double-
61 * jeopardy: the larger the outgoing buffer, the more data to copy when
62 * it overlaps, *and* the more frequently you'll have buffers that *do*
65 * Seeking is another tricky aspect to do efficiently. The initial
66 * implementation of this source won't make use of these features, however.
67 * The issue is that if an application seeks backwards in a file, *and*
68 * that region of the file is covered by an mmap that hasn't been fully
69 * deallocated, we really should re-use it. But keeping track of these
70 * regions is tricky because we have to lock the structure that holds
71 * them. We need to settle on a locking primitive (GMutex seems to be
72 * a really good option...), then we can do that.
76 GST_DEBUG_CATEGORY (gst_filesrc_debug);
77 #define GST_CAT_DEFAULT gst_filesrc_debug
79 GstElementDetails gst_filesrc_details = {
83 "Read from arbitrary point in a file",
85 "Erik Walthinsen <omega@cse.ogi.edu>",
89 #define DEFAULT_BLOCKSIZE 4*1024
90 #define DEFAULT_MMAPSIZE 4*1024*1024
92 #ifdef G_HAVE_ISO_VARARGS
94 /* #define fs_print(...) g_print(__VA_ARGS__) */
97 #elif defined(G_HAVE_GNUC_VARARGS)
99 /* #define fs_print(format,args...) g_print(format, ## args) */
100 #define fs_print(format,args...)
104 /* FileSrc signals and args */
119 GST_PAD_EVENT_MASK_FUNCTION (gst_filesrc_get_event_mask,
120 { GST_EVENT_SEEK, GST_SEEK_METHOD_CUR |
121 GST_SEEK_METHOD_SET |
122 GST_SEEK_METHOD_END |
123 GST_SEEK_FLAG_FLUSH },
124 { GST_EVENT_FLUSH, 0 },
125 { GST_EVENT_SIZE, 0 }
128 GST_PAD_QUERY_TYPE_FUNCTION (gst_filesrc_get_query_types,
133 GST_PAD_FORMATS_FUNCTION (gst_filesrc_get_formats,
137 static void gst_filesrc_class_init (GstFileSrcClass *klass);
138 static void gst_filesrc_init (GstFileSrc *filesrc);
139 static void gst_filesrc_dispose (GObject *object);
141 static void gst_filesrc_set_property (GObject *object, guint prop_id,
142 const GValue *value, GParamSpec *pspec);
143 static void gst_filesrc_get_property (GObject *object, guint prop_id,
144 GValue *value, GParamSpec *pspec);
146 static GstBuffer * gst_filesrc_get (GstPad *pad);
147 static gboolean gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event);
148 static gboolean gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
149 GstFormat *format, gint64 *value);
151 static GstElementStateReturn gst_filesrc_change_state (GstElement *element);
154 static GstElementClass *parent_class = NULL;
155 /*static guint gst_filesrc_signals[LAST_SIGNAL] = { 0 };*/
158 gst_filesrc_get_type(void)
160 static GType filesrc_type = 0;
163 static const GTypeInfo filesrc_info = {
164 sizeof(GstFileSrcClass), NULL,
166 (GClassInitFunc)gst_filesrc_class_init,
171 (GInstanceInitFunc)gst_filesrc_init,
173 filesrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFileSrc", &filesrc_info, 0);
179 gst_filesrc_class_init (GstFileSrcClass *klass)
181 GObjectClass *gobject_class;
182 GstElementClass *gstelement_class;
184 gobject_class = (GObjectClass*)klass;
185 gstelement_class = (GstElementClass*)klass;
187 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
189 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
190 g_param_spec_int ("fd", "File-descriptor", "File-descriptor for the file being mmap()d",
191 0, G_MAXINT, 0, G_PARAM_READABLE));
192 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOCATION,
193 g_param_spec_string ("location", "File Location", "Location of the file to read",
194 NULL, G_PARAM_READWRITE));
195 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
196 g_param_spec_ulong ("blocksize", "Block size", "Size in bytes to read per buffer",
197 1, G_MAXULONG, DEFAULT_BLOCKSIZE, G_PARAM_READWRITE));
198 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MMAPSIZE,
199 g_param_spec_ulong ("mmapsize", "mmap() Block Size",
200 "Size in bytes of mmap()d regions",
201 0, G_MAXULONG, DEFAULT_MMAPSIZE, G_PARAM_READWRITE));
202 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TOUCH,
203 g_param_spec_boolean ("touch", "Touch read data",
204 "Touch data to force disk read",
205 FALSE, G_PARAM_READWRITE));
207 gobject_class->dispose = gst_filesrc_dispose;
208 gobject_class->set_property = gst_filesrc_set_property;
209 gobject_class->get_property = gst_filesrc_get_property;
211 gstelement_class->change_state = gst_filesrc_change_state;
215 gst_filesrc_bufcmp (gconstpointer a, gconstpointer b)
217 /* GstBuffer *bufa = (GstBuffer *)a, *bufb = (GstBuffer *)b;*/
219 /* sort first by offset, then in reverse by size */
220 if (GST_BUFFER_OFFSET(a) < GST_BUFFER_OFFSET(b)) return -1;
221 else if (GST_BUFFER_OFFSET(a) > GST_BUFFER_OFFSET(b)) return 1;
222 else if (GST_BUFFER_SIZE(a) > GST_BUFFER_SIZE(b)) return -1;
223 else if (GST_BUFFER_SIZE(a) < GST_BUFFER_SIZE(b)) return 1;
228 gst_filesrc_init (GstFileSrc *src)
230 src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
231 gst_pad_set_get_function (src->srcpad, gst_filesrc_get);
232 gst_pad_set_event_function (src->srcpad, gst_filesrc_srcpad_event);
233 gst_pad_set_event_mask_function (src->srcpad, gst_filesrc_get_event_mask);
234 gst_pad_set_query_function (src->srcpad, gst_filesrc_srcpad_query);
235 gst_pad_set_query_type_function (src->srcpad, gst_filesrc_get_query_types);
236 gst_pad_set_formats_function (src->srcpad, gst_filesrc_get_formats);
237 gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
239 src->pagesize = getpagesize();
241 src->filename = NULL;
246 src->block_size = DEFAULT_BLOCKSIZE;
250 src->mapsize = DEFAULT_MMAPSIZE; /* default is 4MB */
252 src->map_regions = g_tree_new (gst_filesrc_bufcmp);
253 src->map_regions_lock = g_mutex_new();
255 src->seek_happened = FALSE;
259 gst_filesrc_dispose (GObject *object)
263 src = GST_FILESRC (object);
265 G_OBJECT_CLASS (parent_class)->dispose (object);
267 g_tree_destroy (src->map_regions);
268 g_mutex_free (src->map_regions_lock);
270 g_free (src->filename);
275 gst_filesrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
279 /* it's not null if we got it, but it might not be ours */
280 g_return_if_fail (GST_IS_FILESRC (object));
282 src = GST_FILESRC (object);
286 /* the element must be stopped in order to do this */
287 g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
289 if (src->filename) g_free (src->filename);
290 /* clear the filename if we get a NULL (is that possible?) */
291 if (g_value_get_string (value) == NULL) {
292 gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL);
293 src->filename = NULL;
294 /* otherwise set the new filename */
296 src->filename = g_strdup (g_value_get_string (value));
298 g_object_notify (G_OBJECT (src), "location");
301 src->block_size = g_value_get_ulong (value);
302 g_object_notify (G_OBJECT (src), "blocksize");
305 if ((src->mapsize % src->pagesize) == 0) {
306 src->mapsize = g_value_get_ulong (value);
307 g_object_notify (G_OBJECT (src), "mmapsize");
309 GST_INFO ( "invalid mapsize, must a multiple of pagesize, which is %d",
314 src->touch = g_value_get_boolean (value);
315 g_object_notify (G_OBJECT (src), "touch");
323 gst_filesrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
327 /* it's not null if we got it, but it might not be ours */
328 g_return_if_fail (GST_IS_FILESRC (object));
330 src = GST_FILESRC (object);
334 g_value_set_string (value, src->filename);
337 g_value_set_int (value, src->fd);
340 g_value_set_ulong (value, src->block_size);
343 g_value_set_ulong (value, src->mapsize);
346 g_value_set_boolean (value, src->touch);
349 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
355 gst_filesrc_free_parent_mmap (GstBuffer *buf)
357 GstFileSrc *src = GST_FILESRC (GST_BUFFER_POOL_PRIVATE (buf));
359 fs_print ("freeing mmap()d buffer at %d+%d\n",
360 GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
362 /* remove the buffer from the list of available mmap'd regions */
363 g_mutex_lock (src->map_regions_lock);
364 g_tree_remove (src->map_regions, buf);
365 /* check to see if the tree is empty */
366 if (g_tree_nnodes (src->map_regions) == 0) {
367 /* we have to free the bufferpool we don't have yet */
369 g_mutex_unlock (src->map_regions_lock);
372 /* madvise to tell the kernel what to do with it */
373 madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_DONTNEED);
375 /* now unmap the memory */
376 munmap (GST_BUFFER_DATA (buf), GST_BUFFER_MAXSIZE (buf));
377 /* cast to unsigned long, since there's no gportable way to print
379 GST_DEBUG ( "unmapped region %08lx+%08lx at %p",
380 (unsigned long) GST_BUFFER_OFFSET (buf),
381 (unsigned long) GST_BUFFER_MAXSIZE (buf),
382 GST_BUFFER_DATA (buf));
384 GST_BUFFER_DATA (buf) = NULL;
386 gst_buffer_default_free (buf);
390 gst_filesrc_map_region (GstFileSrc *src, off_t offset, size_t size)
396 g_return_val_if_fail (offset >= 0, NULL);
398 fs_print ("mapping region %08llx+%08x from file into memory\n",offset,size);
399 mmapregion = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
401 if (mmapregion == NULL) {
402 gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
403 g_strdup_printf (_("could not open file %s"), src->filename),
404 g_strdup_printf ("couldn't map file %s", src->filename));
407 else if (mmapregion == MAP_FAILED) {
408 GST_DEBUG ("mmap (0x%x, %d, 0x%llx) : %s",
409 size, src->fd, offset, strerror (errno));
412 GST_DEBUG ( "mapped region %08lx+%08lx from file into memory at %p",
413 (unsigned long)offset, (unsigned long)size, mmapregion);
415 /* time to allocate a new mapbuf */
416 buf = gst_buffer_new ();
417 /* mmap() the data into this new buffer */
418 GST_BUFFER_DATA (buf) = mmapregion;
420 #ifdef MADV_SEQUENTIAL
421 /* madvise to tell the kernel what to do with it */
422 retval = madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_SEQUENTIAL);
424 /* fill in the rest of the fields */
425 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_READONLY);
426 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_ORIGINAL);
427 GST_BUFFER_SIZE (buf) = size;
428 GST_BUFFER_MAXSIZE (buf) = size;
429 GST_BUFFER_OFFSET (buf) = offset;
430 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
431 GST_BUFFER_POOL_PRIVATE (buf) = src;
432 GST_BUFFER_FREE_FUNC (buf) = (GstDataFreeFunction) gst_filesrc_free_parent_mmap;
434 g_mutex_lock (src->map_regions_lock);
435 g_tree_insert (src->map_regions,buf,buf);
436 g_mutex_unlock (src->map_regions_lock);
442 gst_filesrc_map_small_region (GstFileSrc *src, off_t offset, size_t size)
448 /* printf("attempting to map a small buffer at %d+%d\n",offset,size); */
450 /* if the offset starts at a non-page boundary, we have to special case */
451 if ((mod = offset % src->pagesize)) {
454 mapbase = offset - mod;
455 mapsize = ((size + mod + src->pagesize - 1) / src->pagesize) * src->pagesize;
456 /* printf("not on page boundaries, resizing map to %d+%d\n",mapbase,mapsize);*/
457 map = gst_filesrc_map_region(src, mapbase, mapsize);
461 ret = gst_buffer_create_sub (map, offset - mapbase, size);
462 GST_BUFFER_OFFSET (ret) = GST_BUFFER_OFFSET (map) + offset - mapbase;
464 gst_buffer_unref (map);
469 return gst_filesrc_map_region(src,offset,size);
477 /* This allows us to search for a potential mmap region. */
479 gst_filesrc_search_region_match (gpointer a, gpointer b)
481 GstFileSrcRegion *r = (GstFileSrcRegion *)b;
483 /* trying to walk b down the tree, current node is a */
484 if (r->offset < GST_BUFFER_OFFSET(a)) return -1;
485 else if (r->offset >= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 1;
486 else if ((r->offset + r->size) <= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 0;
492 * gst_filesrc_get_mmap:
493 * @pad: #GstPad to push a buffer from
495 * Push a new buffer from the filesrc at the current offset.
498 gst_filesrc_get_mmap (GstFileSrc *src)
500 GstBuffer *buf = NULL, *map;
501 size_t readsize, mapsize;
502 off_t readend,mapstart,mapend;
503 GstFileSrcRegion region;
506 /* calculate end pointers so we don't have to do so repeatedly later */
507 readsize = src->block_size;
508 readend = src->curoffset + src->block_size; /* note this is the byte *after* the read */
509 mapstart = GST_BUFFER_OFFSET (src->mapbuf);
510 mapsize = GST_BUFFER_SIZE (src->mapbuf);
511 mapend = mapstart + mapsize; /* note this is the byte *after* the map */
513 /* check to see if we're going to overflow the end of the file */
514 if (readend > src->filelen) {
515 readsize = src->filelen - src->curoffset;
516 readend = src->curoffset + readsize;
519 GST_LOG ("attempting to read %08lx, %08lx, %08lx, %08lx",
520 (unsigned long)readsize, (unsigned long)readend,
521 (unsigned long)mapstart, (unsigned long)mapend);
523 /* if the start is past the mapstart */
524 if (src->curoffset >= mapstart) {
525 /* if the end is before the mapend, the buffer is in current mmap region... */
526 /* ('cause by definition if readend is in the buffer, so's readstart) */
527 if (readend <= mapend) {
528 fs_print ("read buf %llu+%d lives in current mapbuf %lld+%d, creating subbuffer of mapbuf\n",
529 src->curoffset, readsize, mapstart, mapsize);
530 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - mapstart,
532 GST_BUFFER_OFFSET (buf) = src->curoffset;
534 /* if the start actually is within the current mmap region, map an overlap buffer */
535 } else if (src->curoffset < mapend) {
536 fs_print ("read buf %llu+%d starts in mapbuf %d+%d but ends outside, creating new mmap\n",
537 src->curoffset, readsize, mapstart, mapsize);
538 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
543 /* the only other option is that buffer is totally outside, which means we search for it */
545 /* now we can assume that the start is *before* the current mmap region */
546 /* if the readend is past mapstart, we have two options */
547 } else if (readend >= mapstart) {
548 /* either the read buffer overlaps the start of the mmap region */
549 /* or the read buffer fully contains the current mmap region */
550 /* either way, it's really not relevant, we just create a new region anyway*/
551 fs_print ("read buf %llu+%d starts before mapbuf %d+%d, but overlaps it\n",
552 src->curoffset,readsize, mapstart, mapsize);
553 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
558 /* then deal with the case where the read buffer is totally outside */
560 /* first check to see if there's a map that covers the right region already */
561 fs_print ("searching for mapbuf to cover %llu+%d\n",src->curoffset,readsize);
562 region.offset = src->curoffset;
563 region.size = readsize;
564 map = g_tree_search (src->map_regions,
565 (GCompareFunc) gst_filesrc_search_region_match,
568 /* if we found an exact match, subbuffer it */
570 fs_print ("found mapbuf at %d+%d, creating subbuffer\n",GST_BUFFER_OFFSET(map),GST_BUFFER_SIZE(map));
571 buf = gst_buffer_create_sub (map, src->curoffset - GST_BUFFER_OFFSET(map), readsize);
572 GST_BUFFER_OFFSET (buf) = src->curoffset;
574 /* otherwise we need to create something out of thin air */
576 /* if the read buffer crosses a mmap region boundary, create a one-off region */
577 if ((src->curoffset / src->mapsize) != (readend / src->mapsize)) {
578 fs_print ("read buf %llu+%d crosses a %d-byte boundary, creating a one-off\n",
579 src->curoffset,readsize,src->mapsize);
580 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
584 /* otherwise we will create a new mmap region and set it to the default */
588 off_t nextmap = src->curoffset - (src->curoffset % src->mapsize);
589 fs_print ("read buf %llu+%d in new mapbuf at %llu+%d, mapping and subbuffering\n",
590 src->curoffset, readsize, nextmap, src->mapsize);
591 /* first, we're done with the old mapbuf */
592 gst_buffer_unref(src->mapbuf);
593 mapsize = src->mapsize;
595 /* double the mapsize as long as the readsize is smaller */
596 while (readsize - (src->curoffset - nextmap) > mapsize) {
597 fs_print ("readsize smaller then mapsize %08x %d\n", readsize, mapsize);
600 /* create a new one */
601 src->mapbuf = gst_filesrc_map_region (src, nextmap, mapsize);
602 if (src->mapbuf == NULL)
606 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - nextmap, readsize);
607 GST_BUFFER_OFFSET (buf) = mapstart + src->curoffset - nextmap;
612 /* if we need to touch the buffer (to bring it into memory), do so */
614 volatile guchar *p = GST_BUFFER_DATA (buf), c;
616 for (i=0; i < GST_BUFFER_SIZE (buf); i += src->pagesize)
620 /* we're done, return the buffer */
621 src->curoffset += GST_BUFFER_SIZE(buf);
626 gst_filesrc_get_read (GstFileSrc *src)
628 GstBuffer *buf = NULL;
632 readsize = src->block_size;
633 if (src->curoffset + readsize > src->filelen) {
634 readsize = src->filelen - src->curoffset;
637 buf = gst_buffer_new_and_alloc (readsize);
638 g_return_val_if_fail (buf != NULL, NULL);
640 ret = read (src->fd, GST_BUFFER_DATA (buf), readsize);
641 GST_BUFFER_SIZE (buf) = ret;
643 gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
644 g_strdup_printf (_("Could not read file \"%s\""), src->filename),
645 g_strdup_printf ("Error during file reading: %s", strerror (errno)));
649 src->curoffset += readsize;
655 gst_filesrc_get (GstPad *pad)
659 g_return_val_if_fail (pad != NULL, NULL);
660 src = GST_FILESRC (gst_pad_get_parent (pad));
661 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), NULL);
664 if (src->seek_happened) {
667 src->seek_happened = FALSE;
668 GST_DEBUG ("filesrc sending discont");
669 event = gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, src->curoffset, NULL);
670 src->need_flush = FALSE;
671 return GST_BUFFER (event);
673 /* check for flush */
674 if (src->need_flush) {
675 src->need_flush = FALSE;
676 GST_DEBUG ("filesrc sending flush");
677 return GST_BUFFER (gst_event_new_flush ());
681 if (src->curoffset == src->filelen) {
682 GST_DEBUG ("filesrc eos %" G_GINT64_FORMAT" %" G_GINT64_FORMAT,
683 src->curoffset, src->filelen);
684 gst_element_set_eos (GST_ELEMENT (src));
685 return GST_BUFFER (gst_event_new (GST_EVENT_EOS));
688 if (src->using_mmap){
689 return gst_filesrc_get_mmap (src);
691 return gst_filesrc_get_read (src);
695 /* open the file and mmap it, necessary to go to READY state */
697 gst_filesrc_open_file (GstFileSrc *src)
699 g_return_val_if_fail (!GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
701 GST_DEBUG ( "opening file %s",src->filename);
704 src->fd = open (src->filename, O_RDONLY);
706 gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
707 g_strdup_printf (_("Could not open file \"%s\""), src->filename),
708 g_strdup_printf ("Error opening file \"%s\": %s", src->filename, strerror (errno)));
711 /* check if it is a regular file, otherwise bail out */
712 struct stat stat_results;
714 fstat(src->fd, &stat_results);
716 if (!S_ISREG(stat_results.st_mode)) {
717 gst_element_gerror (GST_ELEMENT (src), GST_ERROR_DEVICE,
718 g_strdup_printf (_("Could not open file \"%s\""), src->filename),
719 g_strdup_printf ("opening file \"%s\" failed. it isn't a regular file",
725 /* find the file length */
726 src->filelen = stat_results.st_size;
728 /* allocate the first mmap'd region */
729 src->mapbuf = gst_filesrc_map_region (src, 0, src->mapsize);
730 if (src->mapbuf == NULL) {
731 src->using_mmap = FALSE;
733 src->using_mmap = TRUE;
738 GST_FLAG_SET (src, GST_FILESRC_OPEN);
743 /* unmap and close the file */
745 gst_filesrc_close_file (GstFileSrc *src)
747 g_return_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN));
752 /* zero out a lot of our state */
758 gst_buffer_unref (src->mapbuf);
762 GST_FLAG_UNSET (src, GST_FILESRC_OPEN);
766 static GstElementStateReturn
767 gst_filesrc_change_state (GstElement *element)
769 GstFileSrc *src = GST_FILESRC(element);
771 switch (GST_STATE_TRANSITION (element)) {
772 case GST_STATE_NULL_TO_READY:
774 case GST_STATE_READY_TO_NULL:
776 case GST_STATE_READY_TO_PAUSED:
777 if (!GST_FLAG_IS_SET (element, GST_FILESRC_OPEN)) {
778 if (!gst_filesrc_open_file (GST_FILESRC (element)))
779 return GST_STATE_FAILURE;
782 case GST_STATE_PAUSED_TO_READY:
783 if (GST_FLAG_IS_SET (element, GST_FILESRC_OPEN))
784 gst_filesrc_close_file (GST_FILESRC (element));
785 src->seek_happened = TRUE;
791 if (GST_ELEMENT_CLASS (parent_class)->change_state)
792 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
794 return GST_STATE_SUCCESS;
798 gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
799 GstFormat *format, gint64 *value)
801 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
804 case GST_QUERY_TOTAL:
805 if (*format != GST_FORMAT_BYTES) {
808 *value = src->filelen;
810 case GST_QUERY_POSITION:
812 case GST_FORMAT_BYTES:
813 *value = src->curoffset;
815 case GST_FORMAT_PERCENT:
816 if (src->filelen == 0)
818 *value = src->curoffset * GST_FORMAT_PERCENT_MAX / src->filelen;
832 gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
834 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
836 GST_DEBUG ( "event %d", GST_EVENT_TYPE (event));
838 switch (GST_EVENT_TYPE (event)) {
843 if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_BYTES) {
847 offset = GST_EVENT_SEEK_OFFSET (event);
849 switch (GST_EVENT_SEEK_METHOD (event)) {
850 case GST_SEEK_METHOD_SET:
851 if (offset > src->filelen)
853 src->curoffset = offset;
854 GST_DEBUG ( "seek set pending to %" G_GINT64_FORMAT, src->curoffset);
856 case GST_SEEK_METHOD_CUR:
857 if (offset + src->curoffset > src->filelen)
859 src->curoffset += offset;
860 GST_DEBUG ( "seek cur pending to %" G_GINT64_FORMAT, src->curoffset);
862 case GST_SEEK_METHOD_END:
863 if (ABS (offset) > src->filelen)
865 src->curoffset = src->filelen - ABS (offset);
866 GST_DEBUG ( "seek end pending to %" G_GINT64_FORMAT, src->curoffset);
872 src->seek_happened = TRUE;
873 src->need_flush = GST_EVENT_SEEK_FLAGS(event) & GST_SEEK_FLAG_FLUSH;
877 if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
880 src->block_size = GST_EVENT_SIZE_VALUE (event);
881 g_object_notify (G_OBJECT (src), "blocksize");
883 case GST_EVENT_FLUSH:
884 src->need_flush = TRUE;
890 gst_event_unref (event);
894 gst_event_unref (event);