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Fixed the _is_span_fast check, NULL pointers are not an option.

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Original commit message from CVS:
Fixed the _is_span_fast check, NULL pointers are not an option.
Fixed the memcpy in _span
This commit is contained in:
Wim Taymans 2001-09-16 18:25:09 +00:00
parent 55c2704ced
commit e8e88392e9
1 changed files with 21 additions and 17 deletions
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38
gst/gstbuffer.c
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@ -409,7 +409,8 @@ gst_buffer_copy (GstBuffer *buffer)
gboolean
gst_buffer_is_span_fast (GstBuffer *buf1, GstBuffer *buf2)
{
return ((buf1->parent == buf2->parent) &&
return (buf1->parent && buf2->parent &&
(buf1->parent == buf2->parent) &&
((buf1->data + buf1->size) == buf2->data));
}
@ -450,26 +451,29 @@ gst_buffer_span (GstBuffer *buf1, guint32 offset, GstBuffer *buf2, guint32 len)
// ((buf1->data + buf1->size) == buf2->data)) {
if (gst_buffer_is_span_fast(buf1,buf2)) {
// we simply create a subbuffer of the common parent
return gst_buffer_create_sub(buf1->parent, buf1->data - (buf1->parent->data) + offset, len);
newbuf = gst_buffer_create_sub(buf1->parent, buf1->data - (buf1->parent->data) + offset, len);
// FIXME unref buf1 and buf2 here?
}
else {
// otherwise we simply have to brute-force copy the buffers
newbuf = gst_buffer_new();
// otherwise we simply have to brute-force copy the buffers
newbuf = gst_buffer_new();
// put in new size
newbuf->size = len;
// allocate space for the copy
newbuf->data = (guchar *)g_malloc(len);
// copy the first buffer's data across
memcpy(newbuf->data, buf1->data + offset, buf1->size - offset);
// copy the second buffer's data across
memcpy(newbuf->data + (buf1->size - offset), buf2->data, len - (buf1->size - offset));
// put in new size
newbuf->size = len;
// allocate space for the copy
newbuf->data = (guchar *)g_malloc(len);
// copy the first buffer's data across
memcpy(newbuf->data, buf1->data + offset, buf1->size - offset);
// copy the second buffer's data across
memcpy(newbuf->data + offset, buf2->data, len - (buf1->size - offset));
if (newbuf->offset != -1)
newbuf->offset = buf1->offset + offset;
newbuf->timestamp = buf1->timestamp;
if (buf2->maxage > buf1->maxage) newbuf->maxage = buf2->maxage;
else newbuf->maxage = buf1->maxage;
if (newbuf->offset != -1)
newbuf->offset = buf1->offset + offset;
newbuf->timestamp = buf1->timestamp;
if (buf2->maxage > buf1->maxage) newbuf->maxage = buf2->maxage;
else newbuf->maxage = buf1->maxage;
}
return newbuf;
}