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always check file length before making decisions based on it

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Original commit message from CVS:
always check file length before making decisions based on it
This commit is contained in:
Benjamin Otte 2003-11-17 01:11:32 +00:00
parent 284a8c25e7
commit 6402b4730b
2 changed files with 82 additions and 22 deletions
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34
gst/elements/gstfilesrc.c
View file

@ -128,6 +128,7 @@ static void gst_filesrc_set_property (GObject *object, guint prop_id,
static void gst_filesrc_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static gboolean gst_filesrc_check_filesize (GstFileSrc *src);
static GstData * gst_filesrc_get (GstPad *pad);
static gboolean gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event);
static gboolean gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
@ -506,9 +507,11 @@ gst_filesrc_get_mmap (GstFileSrc *src)
/* check to see if we're going to overflow the end of the file */
if (readend > src->filelen) {
if (!gst_filesrc_check_filesize (src) || readend > src->filelen) {
readsize = src->filelen - src->curoffset;
readend = src->curoffset + readsize;
}
}
GST_LOG ("attempting to read %08lx, %08lx, %08lx, %08lx",
(unsigned long)readsize, (unsigned long)readend,
@ -626,8 +629,10 @@ gst_filesrc_get_read (GstFileSrc *src)
readsize = src->block_size;
if (src->curoffset + readsize > src->filelen) {
if (!gst_filesrc_check_filesize (src) || src->curoffset + readsize > src->filelen) {
readsize = src->filelen - src->curoffset;
}
}
buf = gst_buffer_new_and_alloc (readsize);
g_return_val_if_fail (buf != NULL, NULL);
@ -675,12 +680,15 @@ gst_filesrc_get (GstPad *pad)
}
/* check for EOF */
g_assert (src->curoffset <= src->filelen);
if (src->curoffset == src->filelen) {
if (!gst_filesrc_check_filesize (src) || src->curoffset >= src->filelen) {
GST_DEBUG_OBJECT (src, "eos %" G_GINT64_FORMAT" %" G_GINT64_FORMAT,
src->curoffset, src->filelen);
gst_element_set_eos (GST_ELEMENT (src));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
}
if (src->using_mmap){
return GST_DATA (gst_filesrc_get_mmap (src));
@ -689,6 +697,22 @@ gst_filesrc_get (GstPad *pad)
}
}
/* TRUE if the filesize of the file was updated */
static gboolean
gst_filesrc_check_filesize (GstFileSrc *src)
{
struct stat stat_results;
g_return_val_if_fail (GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
fstat(src->fd, &stat_results);
GST_DEBUG_OBJECT (src, "checked filesize on %s (was %"G_GUINT64_FORMAT", is %"G_GUINT64_FORMAT")",
src->filename, src->filelen, (guint64) stat_results.st_size);
if (src->filelen == (guint64) stat_results.st_size)
return FALSE;
src->filelen = stat_results.st_size;
return TRUE;
}
/* open the file and mmap it, necessary to go to READY state */
static gboolean
gst_filesrc_open_file (GstFileSrc *src)
@ -799,6 +823,7 @@ gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
if (*format != GST_FORMAT_BYTES) {
return FALSE;
}
gst_filesrc_check_filesize (src);
*value = src->filelen;
break;
case GST_QUERY_POSITION:
@ -842,20 +867,25 @@ gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
switch (GST_EVENT_SEEK_METHOD (event)) {
case GST_SEEK_METHOD_SET:
if (offset > src->filelen)
if (offset > src->filelen && (!gst_filesrc_check_filesize (src) || offset > src->filelen)) {
goto error;
}
src->curoffset = offset;
GST_DEBUG_OBJECT (src, "seek set pending to %" G_GINT64_FORMAT, src->curoffset);
break;
case GST_SEEK_METHOD_CUR:
if (offset + src->curoffset > src->filelen)
if (!gst_filesrc_check_filesize (src) || offset + src->curoffset > src->filelen)
goto error;
src->curoffset += offset;
GST_DEBUG_OBJECT (src, "seek cur pending to %" G_GINT64_FORMAT, src->curoffset);
break;
case GST_SEEK_METHOD_END:
if (ABS (offset) > src->filelen)
if (ABS (offset) > src->filelen) {
if (!gst_filesrc_check_filesize (src) || ABS (offset) > src->filelen)
goto error;
goto error;
}
src->curoffset = src->filelen - ABS (offset);
GST_DEBUG_OBJECT (src, "seek end pending to %" G_GINT64_FORMAT, src->curoffset);
break;

34
plugins/elements/gstfilesrc.c
View file

@ -128,6 +128,7 @@ static void gst_filesrc_set_property (GObject *object, guint prop_id,
static void gst_filesrc_get_property (GObject *object, guint prop_id,
GValue *value, GParamSpec *pspec);
static gboolean gst_filesrc_check_filesize (GstFileSrc *src);
static GstData * gst_filesrc_get (GstPad *pad);
static gboolean gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event);
static gboolean gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
@ -506,9 +507,11 @@ gst_filesrc_get_mmap (GstFileSrc *src)
/* check to see if we're going to overflow the end of the file */
if (readend > src->filelen) {
if (!gst_filesrc_check_filesize (src) || readend > src->filelen) {
readsize = src->filelen - src->curoffset;
readend = src->curoffset + readsize;
}
}
GST_LOG ("attempting to read %08lx, %08lx, %08lx, %08lx",
(unsigned long)readsize, (unsigned long)readend,
@ -626,8 +629,10 @@ gst_filesrc_get_read (GstFileSrc *src)
readsize = src->block_size;
if (src->curoffset + readsize > src->filelen) {
if (!gst_filesrc_check_filesize (src) || src->curoffset + readsize > src->filelen) {
readsize = src->filelen - src->curoffset;
}
}
buf = gst_buffer_new_and_alloc (readsize);
g_return_val_if_fail (buf != NULL, NULL);
@ -675,12 +680,15 @@ gst_filesrc_get (GstPad *pad)
}
/* check for EOF */
g_assert (src->curoffset <= src->filelen);
if (src->curoffset == src->filelen) {
if (!gst_filesrc_check_filesize (src) || src->curoffset >= src->filelen) {
GST_DEBUG_OBJECT (src, "eos %" G_GINT64_FORMAT" %" G_GINT64_FORMAT,
src->curoffset, src->filelen);
gst_element_set_eos (GST_ELEMENT (src));
return GST_DATA (gst_event_new (GST_EVENT_EOS));
}
}
if (src->using_mmap){
return GST_DATA (gst_filesrc_get_mmap (src));
@ -689,6 +697,22 @@ gst_filesrc_get (GstPad *pad)
}
}
/* TRUE if the filesize of the file was updated */
static gboolean
gst_filesrc_check_filesize (GstFileSrc *src)
{
struct stat stat_results;
g_return_val_if_fail (GST_FLAG_IS_SET (src ,GST_FILESRC_OPEN), FALSE);
fstat(src->fd, &stat_results);
GST_DEBUG_OBJECT (src, "checked filesize on %s (was %"G_GUINT64_FORMAT", is %"G_GUINT64_FORMAT")",
src->filename, src->filelen, (guint64) stat_results.st_size);
if (src->filelen == (guint64) stat_results.st_size)
return FALSE;
src->filelen = stat_results.st_size;
return TRUE;
}
/* open the file and mmap it, necessary to go to READY state */
static gboolean
gst_filesrc_open_file (GstFileSrc *src)
@ -799,6 +823,7 @@ gst_filesrc_srcpad_query (GstPad *pad, GstQueryType type,
if (*format != GST_FORMAT_BYTES) {
return FALSE;
}
gst_filesrc_check_filesize (src);
*value = src->filelen;
break;
case GST_QUERY_POSITION:
@ -842,20 +867,25 @@ gst_filesrc_srcpad_event (GstPad *pad, GstEvent *event)
switch (GST_EVENT_SEEK_METHOD (event)) {
case GST_SEEK_METHOD_SET:
if (offset > src->filelen)
if (offset > src->filelen && (!gst_filesrc_check_filesize (src) || offset > src->filelen)) {
goto error;
}
src->curoffset = offset;
GST_DEBUG_OBJECT (src, "seek set pending to %" G_GINT64_FORMAT, src->curoffset);
break;
case GST_SEEK_METHOD_CUR:
if (offset + src->curoffset > src->filelen)
if (!gst_filesrc_check_filesize (src) || offset + src->curoffset > src->filelen)
goto error;
src->curoffset += offset;
GST_DEBUG_OBJECT (src, "seek cur pending to %" G_GINT64_FORMAT, src->curoffset);
break;
case GST_SEEK_METHOD_END:
if (ABS (offset) > src->filelen)
if (ABS (offset) > src->filelen) {
if (!gst_filesrc_check_filesize (src) || ABS (offset) > src->filelen)
goto error;
goto error;
}
src->curoffset = src->filelen - ABS (offset);
GST_DEBUG_OBJECT (src, "seek end pending to %" G_GINT64_FORMAT, src->curoffset);
break;