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 (gst_filesrc_debug);
76 #define GST_CAT_DEFAULT gst_filesrc_debug
78 GstElementDetails gst_filesrc_details = {
82 "Read from arbitrary point in a file",
84 "Erik Walthinsen <omega@cse.ogi.edu>",
88 #define DEFAULT_BLOCKSIZE 4*1024
89 #define DEFAULT_MMAPSIZE 4*1024*1024
91 /* FileSrc signals and args */
106 GST_PAD_EVENT_MASK_FUNCTION (gst_filesrc_get_event_mask,
107 { GST_EVENT_SEEK, GST_SEEK_METHOD_CUR |
108 GST_SEEK_METHOD_SET |
109 GST_SEEK_METHOD_END |
110 GST_SEEK_FLAG_FLUSH },
111 { GST_EVENT_FLUSH, 0 },
112 { GST_EVENT_SIZE, 0 }
115 GST_PAD_QUERY_TYPE_FUNCTION (gst_filesrc_get_query_types,
120 GST_PAD_FORMATS_FUNCTION (gst_filesrc_get_formats,
124 static void gst_filesrc_class_init (GstFileSrcClass *klass);
125 static void gst_filesrc_init (GstFileSrc *filesrc);
126 static void gst_filesrc_dispose (GObject *object);
128 static void gst_filesrc_set_property (GObject *object, guint prop_id,
129 const GValue *value, GParamSpec *pspec);
130 static void gst_filesrc_get_property (GObject *object, guint prop_id,
131 GValue *value, GParamSpec *pspec);
133 static GstData * gst_filesrc_get (GstPad *pad);
134 static gboolean gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event);
135 static gboolean gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
136 GstFormat *format, gint64 *value);
138 static GstElementStateReturn gst_filesrc_change_state (GstElement *element);
141 static GstElementClass *parent_class = NULL;
142 /*static guint gst_filesrc_signals[LAST_SIGNAL] = { 0 };*/
145 gst_filesrc_get_type(void)
147 static GType filesrc_type = 0;
150 static const GTypeInfo filesrc_info = {
151 sizeof(GstFileSrcClass), NULL,
153 (GClassInitFunc)gst_filesrc_class_init,
158 (GInstanceInitFunc)gst_filesrc_init,
160 filesrc_type = g_type_register_static (GST_TYPE_ELEMENT, "GstFileSrc", &filesrc_info, 0);
166 gst_filesrc_class_init (GstFileSrcClass *klass)
168 GObjectClass *gobject_class;
169 GstElementClass *gstelement_class;
171 gobject_class = (GObjectClass*)klass;
172 gstelement_class = (GstElementClass*)klass;
174 parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
176 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FD,
177 g_param_spec_int ("fd", "File-descriptor", "File-descriptor for the file being mmap()d",
178 0, G_MAXINT, 0, G_PARAM_READABLE));
179 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_LOCATION,
180 g_param_spec_string ("location", "File Location", "Location of the file to read",
181 NULL, G_PARAM_READWRITE));
182 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_BLOCKSIZE,
183 g_param_spec_ulong ("blocksize", "Block size", "Size in bytes to read per buffer",
184 1, G_MAXULONG, DEFAULT_BLOCKSIZE, G_PARAM_READWRITE));
185 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_MMAPSIZE,
186 g_param_spec_ulong ("mmapsize", "mmap() Block Size",
187 "Size in bytes of mmap()d regions",
188 0, G_MAXULONG, DEFAULT_MMAPSIZE, G_PARAM_READWRITE));
189 g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_TOUCH,
190 g_param_spec_boolean ("touch", "Touch read data",
191 "Touch data to force disk read",
192 FALSE, G_PARAM_READWRITE));
194 gobject_class->dispose = gst_filesrc_dispose;
195 gobject_class->set_property = gst_filesrc_set_property;
196 gobject_class->get_property = gst_filesrc_get_property;
198 gstelement_class->change_state = gst_filesrc_change_state;
202 gst_filesrc_bufcmp (gconstpointer a, gconstpointer b)
204 /* GstBuffer *bufa = (GstBuffer *)a, *bufb = (GstBuffer *)b;*/
206 /* sort first by offset, then in reverse by size */
207 if (GST_BUFFER_OFFSET(a) < GST_BUFFER_OFFSET(b)) return -1;
208 else if (GST_BUFFER_OFFSET(a) > GST_BUFFER_OFFSET(b)) return 1;
209 else if (GST_BUFFER_SIZE(a) > GST_BUFFER_SIZE(b)) return -1;
210 else if (GST_BUFFER_SIZE(a) < GST_BUFFER_SIZE(b)) return 1;
215 gst_filesrc_init (GstFileSrc *src)
217 src->srcpad = gst_pad_new ("src", GST_PAD_SRC);
218 gst_pad_set_get_function (src->srcpad, gst_filesrc_get);
219 gst_pad_set_event_function (src->srcpad, gst_filesrc_srcpad_event);
220 gst_pad_set_event_mask_function (src->srcpad, gst_filesrc_get_event_mask);
221 gst_pad_set_query_function (src->srcpad, gst_filesrc_srcpad_query);
222 gst_pad_set_query_type_function (src->srcpad, gst_filesrc_get_query_types);
223 gst_pad_set_formats_function (src->srcpad, gst_filesrc_get_formats);
224 gst_element_add_pad (GST_ELEMENT (src), src->srcpad);
226 src->pagesize = getpagesize();
228 src->filename = NULL;
233 src->block_size = DEFAULT_BLOCKSIZE;
237 src->mapsize = DEFAULT_MMAPSIZE; /* default is 4MB */
239 src->map_regions = g_tree_new (gst_filesrc_bufcmp);
240 src->map_regions_lock = g_mutex_new();
242 src->seek_happened = FALSE;
246 gst_filesrc_dispose (GObject *object)
250 src = GST_FILESRC (object);
252 G_OBJECT_CLASS (parent_class)->dispose (object);
254 g_tree_destroy (src->map_regions);
255 g_mutex_free (src->map_regions_lock);
257 g_free (src->filename);
262 gst_filesrc_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
266 /* it's not null if we got it, but it might not be ours */
267 g_return_if_fail (GST_IS_FILESRC (object));
269 src = GST_FILESRC (object);
273 /* the element must be stopped in order to do this */
274 g_return_if_fail (GST_STATE (src) < GST_STATE_PLAYING);
276 if (src->filename) g_free (src->filename);
277 /* clear the filename if we get a NULL (is that possible?) */
278 if (g_value_get_string (value) == NULL) {
279 gst_element_set_state (GST_ELEMENT (object), GST_STATE_NULL);
280 src->filename = NULL;
281 /* otherwise set the new filename */
283 src->filename = g_strdup (g_value_get_string (value));
285 g_object_notify (G_OBJECT (src), "location");
288 src->block_size = g_value_get_ulong (value);
289 g_object_notify (G_OBJECT (src), "blocksize");
292 if ((src->mapsize % src->pagesize) == 0) {
293 src->mapsize = g_value_get_ulong (value);
294 g_object_notify (G_OBJECT (src), "mmapsize");
296 GST_INFO_OBJECT (src, "invalid mapsize, must a multiple of pagesize, which is %d",
301 src->touch = g_value_get_boolean (value);
302 g_object_notify (G_OBJECT (src), "touch");
310 gst_filesrc_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
314 /* it's not null if we got it, but it might not be ours */
315 g_return_if_fail (GST_IS_FILESRC (object));
317 src = GST_FILESRC (object);
321 g_value_set_string (value, src->filename);
324 g_value_set_int (value, src->fd);
327 g_value_set_ulong (value, src->block_size);
330 g_value_set_ulong (value, src->mapsize);
333 g_value_set_boolean (value, src->touch);
336 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
342 gst_filesrc_free_parent_mmap (GstBuffer *buf)
344 GstFileSrc *src = GST_FILESRC (GST_BUFFER_POOL_PRIVATE (buf));
346 GST_LOG_OBJECT (src, "freeing mmap()d buffer at %"G_GUINT64_FORMAT"+%u",
347 GST_BUFFER_OFFSET (buf), GST_BUFFER_SIZE (buf));
349 /* remove the buffer from the list of available mmap'd regions */
350 g_mutex_lock (src->map_regions_lock);
351 g_tree_remove (src->map_regions, buf);
352 /* check to see if the tree is empty */
353 if (g_tree_nnodes (src->map_regions) == 0) {
354 /* we have to free the bufferpool we don't have yet */
356 g_mutex_unlock (src->map_regions_lock);
359 /* madvise to tell the kernel what to do with it */
360 madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_DONTNEED);
362 /* now unmap the memory */
363 munmap (GST_BUFFER_DATA (buf), GST_BUFFER_MAXSIZE (buf));
364 /* cast to unsigned long, since there's no gportable way to print
366 GST_LOG_OBJECT (src, "unmapped region %08lx+%08lx at %p",
367 (unsigned long) GST_BUFFER_OFFSET (buf),
368 (unsigned long) GST_BUFFER_MAXSIZE (buf),
369 GST_BUFFER_DATA (buf));
371 GST_BUFFER_DATA (buf) = NULL;
373 g_object_unref (src);
374 gst_buffer_default_free (buf);
378 gst_filesrc_map_region (GstFileSrc *src, off_t offset, size_t size)
384 g_return_val_if_fail (offset >= 0, NULL);
386 GST_LOG_OBJECT (src, "mapping region %08llx+%08lx from file into memory",offset,(unsigned long)size);
387 mmapregion = mmap (NULL, size, PROT_READ, MAP_SHARED, src->fd, offset);
389 if (mmapregion == NULL) {
390 gst_element_error (GST_ELEMENT (src), "couldn't map file");
393 else if (mmapregion == MAP_FAILED) {
394 GST_WARNING_OBJECT (src, "mmap (0x%08lx, %d, 0x%llx) failed: %s",
395 (unsigned long)size, src->fd, offset, strerror (errno));
398 GST_LOG_OBJECT (src, "mapped region %08lx+%08lx from file into memory at %p",
399 (unsigned long)offset, (unsigned long)size, mmapregion);
401 /* time to allocate a new mapbuf */
402 buf = gst_buffer_new ();
403 /* mmap() the data into this new buffer */
404 GST_BUFFER_DATA (buf) = mmapregion;
406 #ifdef MADV_SEQUENTIAL
407 /* madvise to tell the kernel what to do with it */
408 retval = madvise (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), MADV_SEQUENTIAL);
410 /* fill in the rest of the fields */
411 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_READONLY);
412 GST_BUFFER_FLAG_SET (buf, GST_BUFFER_ORIGINAL);
413 GST_BUFFER_SIZE (buf) = size;
414 GST_BUFFER_MAXSIZE (buf) = size;
415 GST_BUFFER_OFFSET (buf) = offset;
416 GST_BUFFER_TIMESTAMP (buf) = GST_CLOCK_TIME_NONE;
417 GST_BUFFER_POOL_PRIVATE (buf) = src;
419 GST_BUFFER_FREE_FUNC (buf) = (GstDataFreeFunction) gst_filesrc_free_parent_mmap;
421 g_mutex_lock (src->map_regions_lock);
422 g_tree_insert (src->map_regions,buf,buf);
423 g_mutex_unlock (src->map_regions_lock);
429 gst_filesrc_map_small_region (GstFileSrc *src, off_t offset, size_t size)
435 /* printf("attempting to map a small buffer at %d+%d\n",offset,size); */
437 /* if the offset starts at a non-page boundary, we have to special case */
438 if ((mod = offset % src->pagesize)) {
441 mapbase = offset - mod;
442 mapsize = ((size + mod + src->pagesize - 1) / src->pagesize) * src->pagesize;
443 /* printf("not on page boundaries, resizing map to %d+%d\n",mapbase,mapsize);*/
444 map = gst_filesrc_map_region(src, mapbase, mapsize);
448 ret = gst_buffer_create_sub (map, offset - mapbase, size);
449 GST_BUFFER_OFFSET (ret) = GST_BUFFER_OFFSET (map) + offset - mapbase;
451 gst_buffer_unref (map);
456 return gst_filesrc_map_region(src,offset,size);
464 /* This allows us to search for a potential mmap region. */
466 gst_filesrc_search_region_match (gpointer a, gpointer b)
468 GstFileSrcRegion *r = (GstFileSrcRegion *)b;
470 /* trying to walk b down the tree, current node is a */
471 if (r->offset < GST_BUFFER_OFFSET(a)) return -1;
472 else if (r->offset >= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 1;
473 else if ((r->offset + r->size) <= (GST_BUFFER_OFFSET(a) + GST_BUFFER_SIZE(a))) return 0;
479 * gst_filesrc_get_mmap:
480 * @pad: #GstPad to push a buffer from
482 * Push a new buffer from the filesrc at the current offset.
485 gst_filesrc_get_mmap (GstFileSrc *src)
487 GstBuffer *buf = NULL, *map;
488 size_t readsize, mapsize;
489 off_t readend,mapstart,mapend;
490 GstFileSrcRegion region;
493 /* calculate end pointers so we don't have to do so repeatedly later */
494 readsize = src->block_size;
495 readend = src->curoffset + src->block_size; /* note this is the byte *after* the read */
496 mapstart = GST_BUFFER_OFFSET (src->mapbuf);
497 mapsize = GST_BUFFER_SIZE (src->mapbuf);
498 mapend = mapstart + mapsize; /* note this is the byte *after* the map */
500 /* check to see if we're going to overflow the end of the file */
501 if (readend > src->filelen) {
502 readsize = src->filelen - src->curoffset;
503 readend = src->curoffset + readsize;
506 GST_LOG ("attempting to read %08lx, %08lx, %08lx, %08lx",
507 (unsigned long)readsize, (unsigned long)readend,
508 (unsigned long)mapstart, (unsigned long)mapend);
510 /* if the start is past the mapstart */
511 if (src->curoffset >= mapstart) {
512 /* if the end is before the mapend, the buffer is in current mmap region... */
513 /* ('cause by definition if readend is in the buffer, so's readstart) */
514 if (readend <= mapend) {
515 GST_LOG_OBJECT (src, "read buf %llu+%d lives in current mapbuf %lld+%d, creating subbuffer of mapbuf",
516 src->curoffset, readsize, mapstart, mapsize);
517 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - mapstart,
519 GST_BUFFER_OFFSET (buf) = src->curoffset;
521 /* if the start actually is within the current mmap region, map an overlap buffer */
522 } else if (src->curoffset < mapend) {
523 GST_LOG_OBJECT (src, "read buf %llu+%d starts in mapbuf %d+%d but ends outside, creating new mmap",
524 (unsigned long long) src->curoffset, (gint) readsize, (gint) mapstart, (gint) mapsize);
525 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
530 /* the only other option is that buffer is totally outside, which means we search for it */
532 /* now we can assume that the start is *before* the current mmap region */
533 /* if the readend is past mapstart, we have two options */
534 } else if (readend >= mapstart) {
535 /* either the read buffer overlaps the start of the mmap region */
536 /* or the read buffer fully contains the current mmap region */
537 /* either way, it's really not relevant, we just create a new region anyway*/
538 GST_LOG_OBJECT (src, "read buf %llu+%d starts before mapbuf %d+%d, but overlaps it",
539 (unsigned long long) src->curoffset, (gint) readsize, (gint) mapstart, (gint) mapsize);
540 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
545 /* then deal with the case where the read buffer is totally outside */
547 /* first check to see if there's a map that covers the right region already */
548 GST_LOG_OBJECT (src, "searching for mapbuf to cover %llu+%d",src->curoffset,readsize);
549 region.offset = src->curoffset;
550 region.size = readsize;
551 map = g_tree_search (src->map_regions,
552 (GCompareFunc) gst_filesrc_search_region_match,
555 /* if we found an exact match, subbuffer it */
557 GST_LOG_OBJECT (src, "found mapbuf at %"G_GUINT64_FORMAT"+%u, creating subbuffer",
558 GST_BUFFER_OFFSET (map), GST_BUFFER_SIZE (map));
559 buf = gst_buffer_create_sub (map, src->curoffset - GST_BUFFER_OFFSET(map), readsize);
560 GST_BUFFER_OFFSET (buf) = src->curoffset;
562 /* otherwise we need to create something out of thin air */
564 /* if the read buffer crosses a mmap region boundary, create a one-off region */
565 if ((src->curoffset / src->mapsize) != (readend / src->mapsize)) {
566 GST_LOG_OBJECT (src, "read buf %llu+%d crosses a %d-byte boundary, creating a one-off",
567 src->curoffset,readsize,src->mapsize);
568 buf = gst_filesrc_map_small_region (src, src->curoffset, readsize);
572 /* otherwise we will create a new mmap region and set it to the default */
576 off_t nextmap = src->curoffset - (src->curoffset % src->mapsize);
577 GST_LOG_OBJECT (src, "read buf %llu+%d in new mapbuf at %llu+%d, mapping and subbuffering",
578 src->curoffset, readsize, nextmap, src->mapsize);
579 /* first, we're done with the old mapbuf */
580 gst_buffer_unref(src->mapbuf);
581 mapsize = src->mapsize;
583 /* double the mapsize as long as the readsize is smaller */
584 while (readsize - (src->curoffset - nextmap) > mapsize) {
585 GST_LOG_OBJECT (src, "readsize smaller then mapsize %08x %d", readsize, mapsize);
588 /* create a new one */
589 src->mapbuf = gst_filesrc_map_region (src, nextmap, mapsize);
590 if (src->mapbuf == NULL)
594 buf = gst_buffer_create_sub (src->mapbuf, src->curoffset - nextmap, readsize);
595 GST_BUFFER_OFFSET (buf) = mapstart + src->curoffset - nextmap;
600 /* if we need to touch the buffer (to bring it into memory), do so */
602 volatile guchar *p = GST_BUFFER_DATA (buf), c;
604 for (i=0; i < GST_BUFFER_SIZE (buf); i += src->pagesize)
608 /* we're done, return the buffer */
609 src->curoffset += GST_BUFFER_SIZE(buf);
614 gst_filesrc_get_read (GstFileSrc *src)
616 GstBuffer *buf = NULL;
620 readsize = src->block_size;
621 if (src->curoffset + readsize > src->filelen) {
622 readsize = src->filelen - src->curoffset;
625 buf = gst_buffer_new_and_alloc (readsize);
626 g_return_val_if_fail (buf != NULL, NULL);
628 ret = read (src->fd, GST_BUFFER_DATA (buf), readsize);
630 gst_element_error (GST_ELEMENT (src), "reading file (%s)",
631 strerror (errno), NULL);
634 if (ret < readsize) {
635 gst_element_error (GST_ELEMENT (src), "unexpected end of file", NULL);
639 src->curoffset += readsize;
645 gst_filesrc_get (GstPad *pad)
649 g_return_val_if_fail (pad != NULL, NULL);
650 src = GST_FILESRC (gst_pad_get_parent (pad));
651 g_return_val_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN), NULL);
654 if (src->seek_happened) {
657 src->seek_happened = FALSE;
658 GST_DEBUG_OBJECT (src, "sending discont");
659 event = gst_event_new_discontinuous (FALSE, GST_FORMAT_BYTES, src->curoffset, NULL);
660 src->need_flush = FALSE;
661 return GST_DATA (event);
663 /* check for flush */
664 if (src->need_flush) {
665 src->need_flush = FALSE;
666 GST_DEBUG_OBJECT (src, "sending flush");
667 return GST_DATA (gst_event_new_flush ());
671 if (src->curoffset == src->filelen) {
672 GST_DEBUG_OBJECT (src, "eos %" G_GINT64_FORMAT" %" G_GINT64_FORMAT,
673 src->curoffset, src->filelen);
674 gst_element_set_eos (GST_ELEMENT (src));
675 return GST_DATA (gst_event_new (GST_EVENT_EOS));
678 if (src->using_mmap){
679 return GST_DATA (gst_filesrc_get_mmap (src));
681 return GST_DATA (gst_filesrc_get_read (src));
685 /* open the file and mmap it, necessary to go to READY state */
687 gst_filesrc_open_file (GstFileSrc *src)
689 g_return_val_if_fail (!GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
691 GST_INFO_OBJECT (src, "opening file %s",src->filename);
694 src->fd = open (src->filename, O_RDONLY);
696 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" (%s)",
697 src->filename, strerror (errno), NULL);
700 /* check if it is a regular file, otherwise bail out */
701 struct stat stat_results;
703 fstat(src->fd, &stat_results);
705 if (!S_ISREG(stat_results.st_mode)) {
706 gst_element_error (GST_ELEMENT (src), "opening file \"%s\" failed. it isn't a regular file",
707 src->filename, NULL);
712 /* find the file length */
713 src->filelen = stat_results.st_size;
715 /* allocate the first mmap'd region */
716 src->mapbuf = gst_filesrc_map_region (src, 0, src->mapsize);
717 if (src->mapbuf == NULL) {
718 src->using_mmap = FALSE;
720 src->using_mmap = TRUE;
725 GST_FLAG_SET (src, GST_FILESRC_OPEN);
730 /* unmap and close the file */
732 gst_filesrc_close_file (GstFileSrc *src)
734 g_return_if_fail (GST_FLAG_IS_SET (src, GST_FILESRC_OPEN));
739 /* zero out a lot of our state */
745 gst_buffer_unref (src->mapbuf);
749 GST_FLAG_UNSET (src, GST_FILESRC_OPEN);
753 static GstElementStateReturn
754 gst_filesrc_change_state (GstElement *element)
756 GstFileSrc *src = GST_FILESRC(element);
758 switch (GST_STATE_TRANSITION (element)) {
759 case GST_STATE_NULL_TO_READY:
761 case GST_STATE_READY_TO_NULL:
763 case GST_STATE_READY_TO_PAUSED:
764 if (!GST_FLAG_IS_SET (element, GST_FILESRC_OPEN)) {
765 if (!gst_filesrc_open_file (GST_FILESRC (element)))
766 return GST_STATE_FAILURE;
769 case GST_STATE_PAUSED_TO_READY:
770 if (GST_FLAG_IS_SET (element, GST_FILESRC_OPEN))
771 gst_filesrc_close_file (GST_FILESRC (element));
772 src->seek_happened = TRUE;
778 if (GST_ELEMENT_CLASS (parent_class)->change_state)
779 return GST_ELEMENT_CLASS (parent_class)->change_state (element);
781 return GST_STATE_SUCCESS;
785 gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
786 GstFormat *format, gint64 *value)
788 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
791 case GST_QUERY_TOTAL:
792 if (*format != GST_FORMAT_BYTES) {
795 *value = src->filelen;
797 case GST_QUERY_POSITION:
799 case GST_FORMAT_BYTES:
800 *value = src->curoffset;
802 case GST_FORMAT_PERCENT:
803 if (src->filelen == 0)
805 *value = src->curoffset * GST_FORMAT_PERCENT_MAX / src->filelen;
819 gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
821 GstFileSrc *src = GST_FILESRC (GST_PAD_PARENT (pad));
823 GST_DEBUG_OBJECT (src, "event %d", GST_EVENT_TYPE (event));
825 switch (GST_EVENT_TYPE (event)) {
830 if (GST_EVENT_SEEK_FORMAT (event) != GST_FORMAT_BYTES) {
834 offset = GST_EVENT_SEEK_OFFSET (event);
836 switch (GST_EVENT_SEEK_METHOD (event)) {
837 case GST_SEEK_METHOD_SET:
838 if (offset > src->filelen)
840 src->curoffset = offset;
841 GST_DEBUG_OBJECT (src, "seek set pending to %" G_GINT64_FORMAT, src->curoffset);
843 case GST_SEEK_METHOD_CUR:
844 if (offset + src->curoffset > src->filelen)
846 src->curoffset += offset;
847 GST_DEBUG_OBJECT (src, "seek cur pending to %" G_GINT64_FORMAT, src->curoffset);
849 case GST_SEEK_METHOD_END:
850 if (ABS (offset) > src->filelen)
852 src->curoffset = src->filelen - ABS (offset);
853 GST_DEBUG_OBJECT (src, "seek end pending to %" G_GINT64_FORMAT, src->curoffset);
859 src->seek_happened = TRUE;
860 src->need_flush = GST_EVENT_SEEK_FLAGS(event) & GST_SEEK_FLAG_FLUSH;
864 if (GST_EVENT_SIZE_FORMAT (event) != GST_FORMAT_BYTES) {
867 src->block_size = GST_EVENT_SIZE_VALUE (event);
868 g_object_notify (G_OBJECT (src), "blocksize");
870 case GST_EVENT_FLUSH:
871 src->need_flush = TRUE;
877 gst_event_unref (event);
881 gst_event_unref (event);