gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/d3d11/gstd3d11utils.cpp

402 lines
11 KiB
C++

/* GStreamer
* Copyright (C) 2020 Seungha Yang <seungha@centricular.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstd3d11utils.h"
#include "gstd3d11device.h"
#include "gstd3d11_private.h"
#include <windows.h>
#include <versionhelpers.h>
GST_DEBUG_CATEGORY_STATIC (GST_CAT_CONTEXT);
#ifndef GST_DISABLE_GST_DEBUG
#define GST_CAT_DEFAULT ensure_debug_category()
static GstDebugCategory *
ensure_debug_category (void)
{
static gsize cat_gonce = 0;
if (g_once_init_enter (&cat_gonce)) {
gsize cat_done;
cat_done = (gsize) _gst_debug_category_new ("d3d11utils", 0,
"d3d11 utility functions");
g_once_init_leave (&cat_gonce, cat_done);
}
return (GstDebugCategory *) cat_gonce;
}
#else
#define ensure_debug_category() /* NOOP */
#endif /* GST_DISABLE_GST_DEBUG */
static void
_init_context_debug (void)
{
static gsize _init = 0;
if (g_once_init_enter (&_init)) {
GST_DEBUG_CATEGORY_GET (GST_CAT_CONTEXT, "GST_CONTEXT");
g_once_init_leave (&_init, 1);
}
}
/**
* gst_d3d11_handle_set_context:
* @element: a #GstElement
* @context: a #GstContext
* @device: (inout) (transfer full): location of a #GstD3D11Device
*
* Helper function for implementing #GstElementClass.set_context() in
* D3D11 capable elements.
*
* Retrieve's the #GstD3D11Device in @context and places the result in @device.
*
* Returns: whether the @device could be set successfully
*
* Since: 1.20
*/
gboolean
gst_d3d11_handle_set_context (GstElement * element, GstContext * context,
gint adapter, GstD3D11Device ** device)
{
const gchar *context_type;
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
g_return_val_if_fail (device != NULL, FALSE);
_init_context_debug ();
if (!context)
return FALSE;
context_type = gst_context_get_context_type (context);
if (g_strcmp0 (context_type, GST_D3D11_DEVICE_HANDLE_CONTEXT_TYPE) == 0) {
const GstStructure *str;
GstD3D11Device *other_device = NULL;
guint other_adapter = 0;
/* If we had device already, will not replace it */
if (*device)
return TRUE;
str = gst_context_get_structure (context);
if (gst_structure_get (str, "device", GST_TYPE_D3D11_DEVICE,
&other_device, "adapter", G_TYPE_UINT, &other_adapter, NULL)) {
if (adapter == -1 || (guint) adapter == other_adapter) {
GST_CAT_DEBUG_OBJECT (GST_CAT_CONTEXT,
element, "Found D3D11 device context");
*device = other_device;
return TRUE;
}
gst_object_unref (other_device);
}
}
return FALSE;
}
static void
context_set_d3d11_device (GstContext * context, GstD3D11Device * device)
{
GstStructure *s;
guint adapter = 0;
guint device_id = 0;
guint vendor_id = 0;
gboolean hardware = FALSE;
gchar *desc = NULL;
gint64 adapter_luid = 0;
g_return_if_fail (context != NULL);
g_object_get (G_OBJECT (device), "adapter", &adapter, "device-id", &device_id,
"vendor-id", &vendor_id, "hardware", &hardware, "description", &desc,
"adapter-luid", &adapter_luid, NULL);
GST_CAT_LOG (GST_CAT_CONTEXT,
"setting GstD3D11Device(%" GST_PTR_FORMAT
") with adapter %d on context(%" GST_PTR_FORMAT ")",
device, adapter, context);
s = gst_context_writable_structure (context);
gst_structure_set (s, "device", GST_TYPE_D3D11_DEVICE, device,
"adapter", G_TYPE_UINT, adapter,
"adapter-luid", G_TYPE_INT64, adapter_luid,
"device-id", G_TYPE_UINT, device_id,
"vendor-id", G_TYPE_UINT, vendor_id,
"hardware", G_TYPE_BOOLEAN, hardware,
"description", G_TYPE_STRING, GST_STR_NULL (desc), NULL);
g_free (desc);
}
/**
* gst_d3d11_handle_context_query:
* @element: a #GstElement
* @query: a #GstQuery of type %GST_QUERY_CONTEXT
* @device: (transfer none) (nullable): a #GstD3D11Device
*
* Returns: Whether the @query was successfully responded to from the passed
* @device.
*
* Since: 1.20
*/
gboolean
gst_d3d11_handle_context_query (GstElement * element, GstQuery * query,
GstD3D11Device * device)
{
const gchar *context_type;
GstContext *context, *old_context;
g_return_val_if_fail (GST_IS_ELEMENT (element), FALSE);
g_return_val_if_fail (GST_IS_QUERY (query), FALSE);
_init_context_debug ();
GST_LOG_OBJECT (element, "handle context query %" GST_PTR_FORMAT, query);
if (!device)
return FALSE;
gst_query_parse_context_type (query, &context_type);
if (g_strcmp0 (context_type, GST_D3D11_DEVICE_HANDLE_CONTEXT_TYPE) != 0)
return FALSE;
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new (GST_D3D11_DEVICE_HANDLE_CONTEXT_TYPE, TRUE);
context_set_d3d11_device (context, device);
gst_query_set_context (query, context);
gst_context_unref (context);
GST_DEBUG_OBJECT (element, "successfully set %" GST_PTR_FORMAT
" on %" GST_PTR_FORMAT, device, query);
return TRUE;
}
static gboolean
pad_query (const GValue * item, GValue * value, gpointer user_data)
{
GstPad *pad = (GstPad *) g_value_get_object (item);
GstQuery *query = (GstQuery *) user_data;
gboolean res;
res = gst_pad_peer_query (pad, query);
if (res) {
g_value_set_boolean (value, TRUE);
return FALSE;
}
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, pad, "pad peer query failed");
return TRUE;
}
static gboolean
run_query (GstElement * element, GstQuery * query, GstPadDirection direction)
{
GstIterator *it;
GstIteratorFoldFunction func = pad_query;
GValue res = { 0 };
g_value_init (&res, G_TYPE_BOOLEAN);
g_value_set_boolean (&res, FALSE);
/* Ask neighbor */
if (direction == GST_PAD_SRC)
it = gst_element_iterate_src_pads (element);
else
it = gst_element_iterate_sink_pads (element);
while (gst_iterator_fold (it, func, &res, query) == GST_ITERATOR_RESYNC)
gst_iterator_resync (it);
gst_iterator_free (it);
return g_value_get_boolean (&res);
}
static void
run_d3d11_context_query (GstElement * element, GstD3D11Device ** device)
{
GstQuery *query;
GstContext *ctxt = NULL;
/* 1) Query downstream with GST_QUERY_CONTEXT for the context and
* check if downstream already has a context of the specific type
*/
query = gst_query_new_context (GST_D3D11_DEVICE_HANDLE_CONTEXT_TYPE);
if (run_query (element, query, GST_PAD_SRC)) {
gst_query_parse_context (query, &ctxt);
if (ctxt) {
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
"found context (%" GST_PTR_FORMAT ") in downstream query", ctxt);
gst_element_set_context (element, ctxt);
}
}
/* 2) although we found d3d11 device context above, the element does not want
* to use the context. Then try to find from the other direction */
if (*device == NULL && run_query (element, query, GST_PAD_SINK)) {
gst_query_parse_context (query, &ctxt);
if (ctxt) {
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
"found context (%" GST_PTR_FORMAT ") in upstream query", ctxt);
gst_element_set_context (element, ctxt);
}
}
if (*device == NULL) {
/* 3) Post a GST_MESSAGE_NEED_CONTEXT message on the bus with
* the required context type and afterwards check if a
* usable context was set now as in 1). The message could
* be handled by the parent bins of the element and the
* application.
*/
GstMessage *msg;
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
"posting need context message");
msg = gst_message_new_need_context (GST_OBJECT_CAST (element),
GST_D3D11_DEVICE_HANDLE_CONTEXT_TYPE);
gst_element_post_message (element, msg);
}
/*
* Whomever responds to the need-context message performs a
* GstElement::set_context() with the required context in which the element
* is required to update the display_ptr or call gst_gl_handle_set_context().
*/
gst_query_unref (query);
}
/**
* gst_d3d11_ensure_element_data:
* @element: the #GstElement running the query
* @adapter: preferred adapter index, pass adapter >=0 when
* the adapter explicitly required. Otherwise, set -1.
* @device: (inout): the resulting #GstD3D11Device
*
* Perform the steps necessary for retrieving a #GstD3D11Device
* from the surrounding elements or from the application using the #GstContext mechanism.
*
* If the contents of @device is not %NULL, then no #GstContext query is
* necessary for #GstD3D11Device retrieval is performed.
*
* Returns: whether a #GstD3D11Device exists in @device
*
* Since: 1.20
*/
gboolean
gst_d3d11_ensure_element_data (GstElement * element, gint adapter,
GstD3D11Device ** device)
{
guint target_adapter = 0;
g_return_val_if_fail (element != NULL, FALSE);
g_return_val_if_fail (device != NULL, FALSE);
_init_context_debug ();
if (*device) {
GST_LOG_OBJECT (element, "already have a device %" GST_PTR_FORMAT, *device);
return TRUE;
}
run_d3d11_context_query (element, device);
if (*device)
return TRUE;
if (adapter > 0)
target_adapter = adapter;
/* Needs D3D11_CREATE_DEVICE_BGRA_SUPPORT flag for Direct2D interop */
*device = gst_d3d11_device_new (target_adapter,
D3D11_CREATE_DEVICE_BGRA_SUPPORT);
if (*device == NULL) {
GST_ERROR_OBJECT (element,
"Couldn't create new device with adapter index %d", target_adapter);
return FALSE;
} else {
GstContext *context;
GstMessage *msg;
/* Propagate new D3D11 device context */
context = gst_context_new (GST_D3D11_DEVICE_HANDLE_CONTEXT_TYPE, TRUE);
context_set_d3d11_device (context, *device);
gst_element_set_context (element, context);
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
"posting have context (%p) message with D3D11 device context (%p)",
context, *device);
msg = gst_message_new_have_context (GST_OBJECT_CAST (element), context);
gst_element_post_message (GST_ELEMENT_CAST (element), msg);
}
return TRUE;
}
gboolean
_gst_d3d11_result (HRESULT hr, GstD3D11Device * device, GstDebugCategory * cat,
const gchar * file, const gchar * function, gint line)
{
#ifndef GST_DISABLE_GST_DEBUG
gboolean ret = TRUE;
if (FAILED (hr)) {
gchar *error_text = NULL;
error_text = g_win32_error_message ((guint) hr);
/* g_win32_error_message() doesn't cover all HERESULT return code,
* so it could be empty string, or null if there was an error
* in g_utf16_to_utf8() */
gst_debug_log (cat, GST_LEVEL_WARNING, file, function, line,
NULL, "D3D11 call failed: 0x%x, %s", (guint) hr,
GST_STR_NULL (error_text));
g_free (error_text);
ret = FALSE;
}
#if (HAVE_D3D11SDKLAYERS_H || HAVE_DXGIDEBUG_H)
if (device) {
gst_d3d11_device_d3d11_debug (device, file, function, line);
gst_d3d11_device_dxgi_debug (device, file, function, line);
}
#endif
return ret;
#else
return SUCCEEDED (hr);
#endif
}