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egl: Implement sharing of memory

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This commit is contained in:
Sebastian Dröge 2013-02-22 12:48:30 +01:00
parent 106a0f09af
commit 0a5ff713e7
1 changed files with 44 additions and 8 deletions
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52
gst-libs/gst/egl/egl.c
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@ -61,6 +61,9 @@ gst_egl_image_memory_get_image (GstMemory * mem)
{
g_return_val_if_fail (gst_is_egl_image_memory (mem), EGL_NO_IMAGE_KHR);
if (mem->parent)
mem = mem->parent;
return GST_EGL_IMAGE_MEMORY (mem)->image;
}
@ -69,6 +72,9 @@ gst_egl_image_memory_get_display (GstMemory * mem)
{
g_return_val_if_fail (gst_is_egl_image_memory (mem), EGL_NO_IMAGE_KHR);
if (mem->parent)
mem = mem->parent;
return gst_egl_display_ref (GST_EGL_IMAGE_MEMORY (mem)->display);
}
@ -78,6 +84,9 @@ gst_egl_image_memory_get_type (GstMemory * mem)
g_return_val_if_fail (gst_is_egl_image_memory (mem),
GST_EGL_IMAGE_MEMORY_TYPE_INVALID);
if (mem->parent)
mem = mem->parent;
return GST_EGL_IMAGE_MEMORY (mem)->type;
}
@ -97,13 +106,18 @@ gst_egl_image_allocator_free_vfunc (GstAllocator * allocator, GstMemory * mem)
GstEGLImageMemory *emem = (GstEGLImageMemory *) mem;
EGLDisplay display;
display = gst_egl_display_get (emem->display);
eglDestroyImageKHR (display, emem->image);
g_return_if_fail (gst_is_egl_image_memory (mem));
if (emem->user_data_destroy)
emem->user_data_destroy (emem->user_data);
/* Shared memory should not destroy all the data */
if (!mem->parent) {
display = gst_egl_display_get (emem->display);
eglDestroyImageKHR (display, emem->image);
gst_egl_display_unref (emem->display);
if (emem->user_data_destroy)
emem->user_data_destroy (emem->user_data);
gst_egl_display_unref (emem->display);
}
g_slice_free (GstEGLImageMemory, emem);
}
@ -122,7 +136,30 @@ gst_egl_image_mem_unmap (GstMemory * mem)
static GstMemory *
gst_egl_image_mem_share (GstMemory * mem, gssize offset, gssize size)
{
return NULL;
GstMemory *sub;
GstMemory *parent;
if (offset != 0)
return NULL;
if (size != -1 && size != mem->size)
return NULL;
/* find the real parent */
if ((parent = mem->parent) == NULL)
parent = (GstMemory *) mem;
if (size == -1)
size = mem->size - offset;
sub = (GstMemory *) g_slice_new (GstEGLImageMemory);
/* the shared memory is always readonly */
gst_memory_init (GST_MEMORY_CAST (sub), GST_MINI_OBJECT_FLAGS (parent) |
GST_MINI_OBJECT_FLAG_LOCK_READONLY, mem->allocator, parent,
mem->maxsize, mem->align, mem->offset + offset, size);
return sub;
}
static GstMemory *
@ -213,8 +250,7 @@ gst_egl_image_allocator_wrap (GstAllocator * allocator,
}
mem = g_slice_new (GstEGLImageMemory);
gst_memory_init (GST_MEMORY_CAST (mem), GST_MEMORY_FLAG_NO_SHARE, allocator,
NULL, size, 0, 0, 0);
gst_memory_init (GST_MEMORY_CAST (mem), 0, allocator, NULL, size, 0, 0, size);
mem->display = gst_egl_display_ref (display);
mem->image = image;