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gstreamer/gst/vaapi/gstvaapivideomemory.c
Gwenole Beauchesne c82a1bc0ff plugins: fix ref counting of GstVaapiVideoMemory allocator. 
Fix reference counting issue whereby gst_memory_init() does not hold
an extra reference to the GstAllocator. So, there could be situations
where the last instance of GstVaapiVideoAllocator gets released before
a dangling GstVaapiVideoMemory object, thus possibly leading to a crash.
2013-07-12 17:14:49 +02:00

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/*
* gstvaapivideomemory.c - Gstreamer/VA video memory
*
* Copyright (C) 2013 Intel Corporation
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 2.1
* of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA
*/
#include "gst/vaapi/sysdeps.h"
#include "gstvaapivideomemory.h"
GST_DEBUG_CATEGORY_STATIC(gst_debug_vaapivideomemory);
#define GST_CAT_DEFAULT gst_debug_vaapivideomemory
#ifndef GST_VIDEO_INFO_FORMAT_STRING
#define GST_VIDEO_INFO_FORMAT_STRING(vip) \
gst_video_format_to_string(GST_VIDEO_INFO_FORMAT(vip))
#endif
/* ------------------------------------------------------------------------ */
/* --- GstVaapiVideoMemory --- */
/* ------------------------------------------------------------------------ */
static GstVaapiImage *
new_image(GstVaapiDisplay *display, const GstVideoInfo *vip)
{
return gst_vaapi_image_new(display, GST_VIDEO_INFO_FORMAT(vip),
GST_VIDEO_INFO_WIDTH(vip), GST_VIDEO_INFO_HEIGHT(vip));
}
static gboolean
ensure_image(GstVaapiVideoMemory *mem)
{
if (!mem->image && mem->use_direct_rendering) {
mem->image = gst_vaapi_surface_derive_image(mem->surface);
if (!mem->image) {
GST_WARNING("failed to derive image, fallbacking to copy");
mem->use_direct_rendering = FALSE;
}
}
if (!mem->image) {
GstVaapiDisplay * const display =
gst_vaapi_video_meta_get_display(mem->meta);
mem->image = new_image(display, mem->image_info);
if (!mem->image)
return FALSE;
}
gst_vaapi_video_meta_set_image(mem->meta, mem->image);
return TRUE;
}
static GstVaapiSurface *
new_surface(GstVaapiDisplay *display, const GstVideoInfo *vip)
{
GstVaapiSurface *surface;
/* Try with explicit format first */
surface = gst_vaapi_surface_new_with_format(display,
GST_VIDEO_INFO_FORMAT(vip), GST_VIDEO_INFO_WIDTH(vip),
GST_VIDEO_INFO_HEIGHT(vip));
if (surface)
return surface;
/* Try to pick something compatible. Best bet: NV12 (YUV 4:2:0) */
if (GST_VIDEO_INFO_FORMAT(vip) != GST_VIDEO_FORMAT_NV12)
return NULL;
return gst_vaapi_surface_new(display, GST_VAAPI_CHROMA_TYPE_YUV420,
GST_VIDEO_INFO_WIDTH(vip), GST_VIDEO_INFO_HEIGHT(vip));
}
static gboolean
ensure_surface(GstVaapiVideoMemory *mem)
{
if (!mem->surface) {
GstVaapiDisplay * const display =
gst_vaapi_video_meta_get_display(mem->meta);
mem->surface = new_surface(display, mem->surface_info);
if (!mem->surface)
return FALSE;
}
gst_vaapi_video_meta_set_surface(mem->meta, mem->surface);
return TRUE;
}
gboolean
gst_video_meta_map_vaapi_memory(GstVideoMeta *meta, guint plane,
GstMapInfo *info, gpointer *data, gint *stride, GstMapFlags flags)
{
GstVaapiVideoMemory * const mem =
GST_VAAPI_VIDEO_MEMORY_CAST(gst_buffer_get_memory(meta->buffer, 0));
g_return_val_if_fail(mem, FALSE);
g_return_val_if_fail(GST_VAAPI_IS_VIDEO_ALLOCATOR(mem->parent_instance.
allocator), FALSE);
g_return_val_if_fail(mem->meta, FALSE);
if (mem->map_type &&
mem->map_type != GST_VAAPI_VIDEO_MEMORY_MAP_TYPE_PLANAR)
goto error_incompatible_map;
if ((flags & GST_MAP_READWRITE) != GST_MAP_WRITE)
goto error_unsupported_map;
/* Map for writing */
if (++mem->map_count == 1) {
if (!ensure_surface(mem))
goto error_ensure_surface;
if (!ensure_image(mem))
goto error_ensure_image;
if (!gst_vaapi_image_map(mem->image))
goto error_map_image;
mem->map_type = GST_VAAPI_VIDEO_MEMORY_MAP_TYPE_PLANAR;
}
*data = gst_vaapi_image_get_plane(mem->image, plane);
*stride = gst_vaapi_image_get_pitch(mem->image, plane);
info->flags = flags;
return TRUE;
/* ERRORS */
error_incompatible_map:
{
GST_ERROR("incompatible map type (%d)", mem->map_type);
return FALSE;
}
error_unsupported_map:
{
GST_ERROR("unsupported map flags (0x%x)", flags);
return FALSE;
}
error_ensure_surface:
{
const GstVideoInfo * const vip = mem->surface_info;
GST_ERROR("failed to create %s surface of size %ux%u",
GST_VIDEO_INFO_FORMAT_STRING(vip),
GST_VIDEO_INFO_WIDTH(vip), GST_VIDEO_INFO_HEIGHT(vip));
return FALSE;
}
error_ensure_image:
{
const GstVideoInfo * const vip = mem->image_info;
GST_ERROR("failed to create %s image of size %ux%u",
GST_VIDEO_INFO_FORMAT_STRING(vip),
GST_VIDEO_INFO_WIDTH(vip), GST_VIDEO_INFO_HEIGHT(vip));
return FALSE;
}
error_map_image:
{
GST_ERROR("failed to map image %" GST_VAAPI_ID_FORMAT,
GST_VAAPI_ID_ARGS(gst_vaapi_image_get_id(mem->image)));
return FALSE;
}
}
gboolean
gst_video_meta_unmap_vaapi_memory(GstVideoMeta *meta, guint plane,
GstMapInfo *info)
{
GstVaapiVideoMemory * const mem =
GST_VAAPI_VIDEO_MEMORY_CAST(gst_buffer_get_memory(meta->buffer, 0));
g_return_val_if_fail(mem, FALSE);
g_return_val_if_fail(GST_VAAPI_IS_VIDEO_ALLOCATOR(mem->parent_instance.
allocator), FALSE);
g_return_val_if_fail(mem->meta, FALSE);
g_return_val_if_fail(mem->surface, FALSE);
g_return_val_if_fail(mem->image, FALSE);
if (--mem->map_count == 0) {
mem->map_type = 0;
/* Unmap VA image used for read/writes */
if (info->flags & GST_MAP_READWRITE)
gst_vaapi_image_unmap(mem->image);
/* Commit VA image to surface */
if ((info->flags & GST_MAP_WRITE) && !mem->use_direct_rendering) {
if (!gst_vaapi_surface_put_image(mem->surface, mem->image))
goto error_upload_image;
}
}
return TRUE;
/* ERRORS */
error_upload_image:
{
GST_ERROR("failed to upload image");
return FALSE;
}
}
GstMemory *
gst_vaapi_video_memory_new(GstAllocator *base_allocator,
GstVaapiVideoMeta *meta)
{
GstVaapiVideoAllocator * const allocator =
GST_VAAPI_VIDEO_ALLOCATOR_CAST(base_allocator);
const GstVideoInfo *vip;
GstVaapiVideoMemory *mem;
mem = g_slice_new(GstVaapiVideoMemory);
if (!mem)
return NULL;
vip = &allocator->image_info;
gst_memory_init(&mem->parent_instance, 0, gst_object_ref(allocator), NULL,
GST_VIDEO_INFO_SIZE(vip), 0, 0, GST_VIDEO_INFO_SIZE(vip));
mem->proxy = NULL;
mem->surface_info = &allocator->surface_info;
mem->surface = NULL;
mem->image_info = &allocator->image_info;
mem->image = NULL;
mem->meta = gst_vaapi_video_meta_ref(meta);
mem->map_type = 0;
mem->map_count = 0;
mem->use_direct_rendering = allocator->has_direct_rendering;
return GST_MEMORY_CAST(mem);
}
static void
gst_vaapi_video_memory_free(GstVaapiVideoMemory *mem)
{
gst_vaapi_object_replace(&mem->surface, NULL);
gst_vaapi_object_replace(&mem->image, NULL);
gst_vaapi_video_meta_unref(mem->meta);
gst_object_unref(GST_MEMORY_CAST(mem)->allocator);
g_slice_free(GstVaapiVideoMemory, mem);
}
static gpointer
gst_vaapi_video_memory_map(GstVaapiVideoMemory *mem, gsize maxsize, guint flags)
{
if (mem->map_type &&
mem->map_type != GST_VAAPI_VIDEO_MEMORY_MAP_TYPE_SURFACE)
goto error_incompatible_map;
if (mem->map_count == 0) {
gst_vaapi_surface_proxy_replace(&mem->proxy,
gst_vaapi_video_meta_get_surface_proxy(mem->meta));
if (!mem->proxy)
goto error_no_surface_proxy;
mem->map_type = GST_VAAPI_VIDEO_MEMORY_MAP_TYPE_SURFACE;
}
mem->map_count++;
return mem->proxy;
/* ERRORS */
error_incompatible_map:
GST_ERROR("failed to map memory to a GstVaapiSurfaceProxy");
return NULL;
error_no_surface_proxy:
GST_ERROR("failed to extract GstVaapiSurfaceProxy from video meta");
return NULL;
}
static void
gst_vaapi_video_memory_unmap(GstVaapiVideoMemory *mem)
{
if (mem->map_type &&
mem->map_type != GST_VAAPI_VIDEO_MEMORY_MAP_TYPE_SURFACE)
goto error_incompatible_map;
if (--mem->map_count == 0) {
gst_vaapi_surface_proxy_replace(&mem->proxy, NULL);
mem->map_type = 0;
}
return;
/* ERRORS */
error_incompatible_map:
GST_ERROR("incompatible map type (%d)", mem->map_type);
return;
}
static GstVaapiVideoMemory *
gst_vaapi_video_memory_copy(GstVaapiVideoMemory *mem,
gssize offset, gssize size)
{
GstMemory *out_mem;
if (offset != 0 || size != -1)
goto error_unsupported;
out_mem = gst_vaapi_video_memory_new(mem->parent_instance.allocator,
mem->meta);
if (!out_mem)
goto error_allocate_memory;
return GST_VAAPI_VIDEO_MEMORY_CAST(out_mem);
/* ERRORS */
error_unsupported:
GST_ERROR("failed to copy partial memory (unsupported operation)");
return NULL;
error_allocate_memory:
GST_ERROR("failed to allocate GstVaapiVideoMemory copy");
return NULL;
}
static GstVaapiVideoMemory *
gst_vaapi_video_memory_share(GstVaapiVideoMemory *mem,
gssize offset, gssize size)
{
GST_FIXME("unimplemented GstVaapiVideoAllocator::mem_share() hook");
return NULL;
}
static gboolean
gst_vaapi_video_memory_is_span(GstVaapiVideoMemory *mem1,
GstVaapiVideoMemory *mem2, gsize *offset_ptr)
{
GST_FIXME("unimplemented GstVaapiVideoAllocator::mem_is_span() hook");
return FALSE;
}
/* ------------------------------------------------------------------------ */
/* --- GstVaapiVideoAllocator --- */
/* ------------------------------------------------------------------------ */
#define GST_VAAPI_VIDEO_ALLOCATOR_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), \
GST_VAAPI_TYPE_VIDEO_ALLOCATOR, \
GstVaapiVideoAllocatorClass))
#define GST_VAAPI_IS_VIDEO_ALLOCATOR_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass), GST_VAAPI_TYPE_VIDEO_ALLOCATOR))
G_DEFINE_TYPE(GstVaapiVideoAllocator,
gst_vaapi_video_allocator,
GST_TYPE_ALLOCATOR)
static GstMemory *
gst_vaapi_video_allocator_alloc(GstAllocator *allocator, gsize size,
GstAllocationParams *params)
{
g_warning("use gst_vaapi_video_memory_new() to allocate from "
"GstVaapiVideoMemory allocator");
return NULL;
}
static void
gst_vaapi_video_allocator_free(GstAllocator *allocator, GstMemory *mem)
{
gst_vaapi_video_memory_free(GST_VAAPI_VIDEO_MEMORY_CAST(mem));
}
static void
gst_vaapi_video_allocator_class_init(GstVaapiVideoAllocatorClass *klass)
{
GstAllocatorClass * const allocator_class = GST_ALLOCATOR_CLASS(klass);
GST_DEBUG_CATEGORY_INIT(gst_debug_vaapivideomemory,
"vaapivideomemory", 0, "VA-API video memory allocator");
allocator_class->alloc = gst_vaapi_video_allocator_alloc;
allocator_class->free = gst_vaapi_video_allocator_free;
}
static void
gst_vaapi_video_allocator_init(GstVaapiVideoAllocator *allocator)
{
GstAllocator * const base_allocator = GST_ALLOCATOR_CAST(allocator);
base_allocator->mem_type = GST_VAAPI_VIDEO_MEMORY_NAME;
base_allocator->mem_map = (GstMemoryMapFunction)
gst_vaapi_video_memory_map;
base_allocator->mem_unmap = (GstMemoryUnmapFunction)
gst_vaapi_video_memory_unmap;
base_allocator->mem_copy = (GstMemoryCopyFunction)
gst_vaapi_video_memory_copy;
base_allocator->mem_share = (GstMemoryShareFunction)
gst_vaapi_video_memory_share;
base_allocator->mem_is_span = (GstMemoryIsSpanFunction)
gst_vaapi_video_memory_is_span;
}
static gboolean
gst_video_info_update_from_image(GstVideoInfo *vip, GstVaapiImage *image)
{
GstVideoFormat format;
const guchar *data;
guint i, num_planes, data_size, width, height;
/* Reset format from image */
format = gst_vaapi_image_get_format(image);
gst_vaapi_image_get_size(image, &width, &height);
gst_video_info_set_format(vip, format, width, height);
num_planes = gst_vaapi_image_get_plane_count(image);
g_return_val_if_fail(num_planes == GST_VIDEO_INFO_N_PLANES(vip), FALSE);
/* Determine the base data pointer */
data = gst_vaapi_image_get_plane(image, 0);
for (i = 1; i < num_planes; i++) {
const guchar * const plane = gst_vaapi_image_get_plane(image, i);
if (data > plane)
data = plane;
}
data_size = gst_vaapi_image_get_data_size(image);
/* Check that we don't have disjoint planes */
for (i = 0; i < num_planes; i++) {
const guchar * const plane = gst_vaapi_image_get_plane(image, i);
if (plane - data > data_size)
return FALSE;
}
/* Update GstVideoInfo structure */
for (i = 0; i < num_planes; i++) {
const guchar * const plane = gst_vaapi_image_get_plane(image, i);
GST_VIDEO_INFO_PLANE_OFFSET(vip, i) = plane - data;
GST_VIDEO_INFO_PLANE_STRIDE(vip, i) =
gst_vaapi_image_get_pitch(image, i);
}
GST_VIDEO_INFO_SIZE(vip) = data_size;
return TRUE;
}
GstAllocator *
gst_vaapi_video_allocator_new(GstVaapiDisplay *display, GstCaps *caps)
{
GstVaapiVideoAllocator *allocator;
GstVideoInfo *vip;
GstVaapiSurface *surface;
GstVaapiImage *image;
g_return_val_if_fail(display != NULL, NULL);
g_return_val_if_fail(GST_IS_CAPS(caps), NULL);
allocator = g_object_new(GST_VAAPI_TYPE_VIDEO_ALLOCATOR, NULL);
if (!allocator)
return NULL;
vip = &allocator->video_info;
gst_video_info_init(vip);
gst_video_info_from_caps(vip, caps);
gst_video_info_set_format(&allocator->surface_info, GST_VIDEO_FORMAT_NV12,
GST_VIDEO_INFO_WIDTH(vip), GST_VIDEO_INFO_HEIGHT(vip));
if (GST_VIDEO_INFO_FORMAT(vip) != GST_VIDEO_FORMAT_ENCODED) {
image = NULL;
do {
surface = new_surface(display, vip);
if (!surface)
break;
image = gst_vaapi_surface_derive_image(surface);
if (!image)
break;
if (!gst_vaapi_image_map(image))
break;
allocator->has_direct_rendering = gst_video_info_update_from_image(
&allocator->surface_info, image);
gst_vaapi_image_unmap(image);
GST_INFO("has direct-rendering for %s surfaces: %s",
GST_VIDEO_INFO_FORMAT_STRING(&allocator->surface_info),
allocator->has_direct_rendering ? "yes" : "no");
} while (0);
if (surface)
gst_vaapi_object_unref(surface);
if (image)
gst_vaapi_object_unref(image);
}
allocator->image_info = *vip;
if (GST_VIDEO_INFO_FORMAT(vip) == GST_VIDEO_FORMAT_ENCODED)
gst_video_info_set_format(&allocator->image_info, GST_VIDEO_FORMAT_NV12,
GST_VIDEO_INFO_WIDTH(vip), GST_VIDEO_INFO_HEIGHT(vip));
if (allocator->has_direct_rendering)
allocator->image_info = allocator->surface_info;
else {
do {
image = new_image(display, &allocator->image_info);
if (!image)
break;
if (!gst_vaapi_image_map(image))
break;
gst_video_info_update_from_image(&allocator->image_info, image);
gst_vaapi_image_unmap(image);
} while (0);
gst_vaapi_object_unref(image);
}
return GST_ALLOCATOR_CAST(allocator);
}
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