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dmabuf: Make it not a singleton

Browse source 
Makes it easier to track how many users there are

Also make it possible to create a dmabuf struct on systems without mmap,
it just won't be possible to map it.

https://bugzilla.gnome.org/show_bug.cgi?id=707793
This commit is contained in:
Olivier Crête 2013-09-04 20:21:54 -04:00
parent 240c7234f6
commit d6187c00a6
2 changed files with 13 additions and 56 deletions
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67
gst-libs/gst/allocators/gstdmabuf.c
View file

@ -32,7 +32,6 @@
* Since: 1.2
*/
#ifdef HAVE_MMAP
#include <sys/mman.h>
#include <unistd.h>
@ -77,6 +76,7 @@ gst_dmabuf_allocator_free (GstAllocator * allocator, GstMemory * gmem)
static gpointer
gst_dmabuf_mem_map (GstMemory * gmem, gsize maxsize, GstMapFlags flags)
{
#ifdef HAVE_MMAP
GstDmaBufMemory *mem = (GstDmaBufMemory *) gmem;
gint prot;
gpointer ret = NULL;
@ -120,11 +120,15 @@ gst_dmabuf_mem_map (GstMemory * gmem, gsize maxsize, GstMapFlags flags)
out:
g_mutex_unlock (&mem->lock);
return ret;
#else /* !HAVE_MMAP */
return FALSE;
#endif
}
static void
gst_dmabuf_mem_unmap (GstMemory * gmem)
{
#if HAVE_MMAP
GstDmaBufMemory *mem = (GstDmaBufMemory *) gmem;
g_mutex_lock (&mem->lock);
@ -136,6 +140,7 @@ gst_dmabuf_mem_unmap (GstMemory * gmem)
GST_DEBUG ("%p: fd %d unmapped", mem, mem->fd);
}
g_mutex_unlock (&mem->lock);
#endif
}
static GstMemory *
@ -208,39 +213,23 @@ dmabuf_mem_allocator_init (GstDmaBufAllocator * allocator)
GST_OBJECT_FLAG_SET (allocator, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC);
}
static void
gst_dmabuf_mem_init (void)
{
GstAllocator *allocator =
g_object_new (dmabuf_mem_allocator_get_type (), NULL);
gst_allocator_register (GST_ALLOCATOR_DMABUF, allocator);
GST_DEBUG_CATEGORY_INIT (dmabuf_debug, "dmabuf", 0, "dmabuf memory");
}
/**
* gst_dmabuf_allocator_obtain:
* gst_dmabuf_allocator_new:
*
* Return a dmabuf allocator.
* Return a new dmabuf allocator.
*
* Returns: (transfer full): a dmabuf allocator, or NULL if the allocator
* Returns: (transfer full): a new dmabuf allocator, or NULL if the allocator
* isn't available. Use gst_object_unref() to release the allocator after
* usage
*
* Since: 1.2
*/
GstAllocator *
gst_dmabuf_allocator_obtain (void)
gst_dmabuf_allocator_new (void)
{
static GOnce dmabuf_allocator_once = G_ONCE_INIT;
GstAllocator *allocator;
GST_DEBUG_CATEGORY_INIT (dmabuf_debug, "dmabuf", 0, "dmabuf memory");
g_once (&dmabuf_allocator_once, (GThreadFunc) gst_dmabuf_mem_init, NULL);
allocator = gst_allocator_find (GST_ALLOCATOR_DMABUF);
if (!allocator)
GST_WARNING ("No allocator named %s found", GST_ALLOCATOR_DMABUF);
return allocator;
return g_object_new (GST_TYPE_DMABUF_ALLOCATOR, NULL);
}
/**
@ -262,10 +251,6 @@ gst_dmabuf_allocator_alloc (GstAllocator * allocator, gint fd, gsize size)
{
GstDmaBufMemory *mem;
if (!allocator) {
allocator = gst_dmabuf_allocator_obtain ();
}
if (!GST_IS_DMABUF_ALLOCATOR (allocator)) {
GST_WARNING ("it isn't the correct allocator for dmabuf");
return NULL;
@ -321,31 +306,3 @@ gst_is_dmabuf_memory (GstMemory * mem)
{
return gst_memory_is_type (mem, GST_ALLOCATOR_DMABUF);
}
#else /* !HAVE_MMAP */
GstAllocator *
gst_dmabuf_allocator_obtain (void)
{
return NULL;
}
GstMemory *
gst_dmabuf_allocator_alloc (GstAllocator * allocator, gint fd, gsize size)
{
return NULL;
}
gint
gst_dmabuf_memory_get_fd (GstMemory * mem)
{
return -1;
}
gboolean
gst_is_dmabuf_memory (GstMemory * mem)
{
return FALSE;
}
#endif /* HAVE_MMAP */

2
gst-libs/gst/allocators/gstdmabuf.h
View file

@ -27,7 +27,7 @@ G_BEGIN_DECLS
#define GST_ALLOCATOR_DMABUF "dmabuf"
GstAllocator * gst_dmabuf_allocator_obtain (void);
GstAllocator * gst_dmabuf_allocator_new (void);
GstMemory * gst_dmabuf_allocator_alloc (GstAllocator * allocator, gint fd, gsize size);