gstreamer/sys/nvcodec/gstcudautils.c

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/* GStreamer
* Copyright (C) <2018-2019> Seungha Yang <seungha.yang@navercorp.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 "gstcudautils.h"
#include "gstcudacontext.h"
#ifdef HAVE_NVCODEC_GST_GL
#include <gst/gl/gl.h>
#include <gst/gl/gstglfuncs.h>
#endif
GST_DEBUG_CATEGORY_STATIC (gst_cuda_utils_debug);
#define GST_CAT_DEFAULT gst_cuda_utils_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_CONTEXT);
static void
_init_debug (void)
{
static volatile gsize once_init = 0;
if (g_once_init_enter (&once_init)) {
GST_DEBUG_CATEGORY_INIT (gst_cuda_utils_debug, "cudautils", 0,
"CUDA utils");
GST_DEBUG_CATEGORY_GET (GST_CAT_CONTEXT, "GST_CONTEXT");
g_once_init_leave (&once_init, 1);
}
}
static gboolean
pad_query (const GValue * item, GValue * value, gpointer user_data)
{
GstPad *pad = g_value_get_object (item);
GstQuery *query = 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
find_cuda_context (GstElement * element, GstCudaContext ** cuda_ctx)
{
GstQuery *query;
GstContext *ctxt;
/* 1) Query downstream with GST_QUERY_CONTEXT for the context and
* check if upstream already has a context of the specific type
* 2) Query upstream as above.
*/
query = gst_query_new_context (GST_CUDA_CONTEXT_TYPE);
if (run_query (element, query, GST_PAD_SRC)) {
gst_query_parse_context (query, &ctxt);
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
"found context (%p) in downstream query", ctxt);
gst_element_set_context (element, ctxt);
}
/* although we found cuda context above, the element does not want
* to use the context. Then try to find from the other direction */
if (*cuda_ctx == NULL && run_query (element, query, GST_PAD_SINK)) {
gst_query_parse_context (query, &ctxt);
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
"found context (%p) in upstream query", ctxt);
gst_element_set_context (element, ctxt);
}
if (*cuda_ctx == 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. 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_CUDA_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 cuda_ctx or call gst_cuda_handle_set_context().
*/
gst_query_unref (query);
}
static void
context_set_cuda_context (GstContext * context, GstCudaContext * cuda_ctx)
{
GstStructure *s;
gint device_id;
g_return_if_fail (context != NULL);
g_object_get (G_OBJECT (cuda_ctx), "cuda-device-id", &device_id, NULL);
GST_CAT_LOG (GST_CAT_CONTEXT,
"setting GstCudaContext(%" GST_PTR_FORMAT
") with cuda-device-id %d on context(%" GST_PTR_FORMAT ")",
cuda_ctx, device_id, context);
s = gst_context_writable_structure (context);
gst_structure_set (s, GST_CUDA_CONTEXT_TYPE, GST_TYPE_CUDA_CONTEXT,
cuda_ctx, "cuda-device-id", G_TYPE_INT, device_id, NULL);
}
/**
* gst_cuda_ensure_element_context:
* @element: the #GstElement running the query
2019-09-02 19:08:44 +00:00
* @device_id: preferred device-id, pass device_id >=0 when
* the device_id explicitly required. Otherwise, set -1.
* @cuda_ctx: (inout): the resulting #GstCudaContext
*
* Perform the steps necessary for retrieving a #GstCudaContext from the
* surrounding elements or from the application using the #GstContext mechanism.
*
* If the content of @cuda_ctx is not %NULL, then no #GstContext query is
* necessary for #GstCudaContext.
*
* Returns: whether a #GstCudaContext exists in @cuda_ctx
*/
gboolean
gst_cuda_ensure_element_context (GstElement * element, gint device_id,
GstCudaContext ** cuda_ctx)
{
g_return_val_if_fail (element != NULL, FALSE);
g_return_val_if_fail (cuda_ctx != NULL, FALSE);
_init_debug ();
if (*cuda_ctx)
return TRUE;
find_cuda_context (element, cuda_ctx);
if (*cuda_ctx)
return TRUE;
/* No available CUDA context in pipeline, create new one here */
*cuda_ctx = gst_cuda_context_new (device_id);
if (*cuda_ctx == NULL) {
GST_CAT_ERROR_OBJECT (GST_CAT_CONTEXT, element,
"Failed to create CUDA context with device-id %d", device_id);
return FALSE;
} else {
GstContext *context;
GstMessage *msg;
/* Propagate new CUDA context */
context = gst_context_new (GST_CUDA_CONTEXT_TYPE, TRUE);
context_set_cuda_context (context, *cuda_ctx);
gst_element_set_context (element, context);
GST_CAT_INFO_OBJECT (GST_CAT_CONTEXT, element,
"posting have context (%p) message with CUDA context (%p)",
context, *cuda_ctx);
msg = gst_message_new_have_context (GST_OBJECT_CAST (element), context);
gst_element_post_message (GST_ELEMENT_CAST (element), msg);
}
return TRUE;
}
/**
* gst_cuda_handle_set_context:
* @element: a #GstElement
* @context: a #GstContext
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* @device_id: preferred device-id, pass device_id >=0 when
* the device_id explicitly required. Otherwise, set -1.
* @cuda_ctx: (inout) (transfer full): location of a #GstCudaContext
*
* Helper function for implementing #GstElementClass.set_context() in
* CUDA capable elements.
*
* Retrieves the #GstCudaContext in @context and places the result in @cuda_ctx.
*
* Returns: whether the @cuda_ctx could be set successfully
*/
gboolean
gst_cuda_handle_set_context (GstElement * element,
GstContext * context, gint device_id, GstCudaContext ** cuda_ctx)
{
const gchar *context_type;
g_return_val_if_fail (element != NULL, FALSE);
g_return_val_if_fail (cuda_ctx != NULL, FALSE);
_init_debug ();
if (!context)
return FALSE;
context_type = gst_context_get_context_type (context);
if (g_strcmp0 (context_type, GST_CUDA_CONTEXT_TYPE) == 0) {
const GstStructure *str;
GstCudaContext *other_ctx = NULL;
gint other_device_id = 0;
/* If we had context already, will not replace it */
if (*cuda_ctx)
return TRUE;
str = gst_context_get_structure (context);
if (gst_structure_get (str, GST_CUDA_CONTEXT_TYPE, GST_TYPE_CUDA_CONTEXT,
&other_ctx, NULL)) {
g_object_get (other_ctx, "cuda-device-id", &other_device_id, NULL);
if (device_id == -1 || other_device_id == device_id) {
GST_CAT_DEBUG_OBJECT (GST_CAT_CONTEXT, element, "Found CUDA context");
*cuda_ctx = other_ctx;
return TRUE;
}
gst_object_unref (other_ctx);
}
}
return FALSE;
}
/**
* gst_cuda_handle_context_query:
* @element: a #GstElement
* @query: a #GstQuery of type %GST_QUERY_CONTEXT
* @cuda_ctx: (transfer none) (nullable): a #GstCudaContext
*
* Returns: Whether the @query was successfully responded to from the passed
* @context.
*/
gboolean
gst_cuda_handle_context_query (GstElement * element,
GstQuery * query, GstCudaContext * cuda_ctx)
{
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);
g_return_val_if_fail (cuda_ctx == NULL
|| GST_IS_CUDA_CONTEXT (cuda_ctx), FALSE);
_init_debug ();
GST_CAT_LOG_OBJECT (GST_CAT_CONTEXT, element,
"handle context query %" GST_PTR_FORMAT, query);
gst_query_parse_context_type (query, &context_type);
if (cuda_ctx && g_strcmp0 (context_type, GST_CUDA_CONTEXT_TYPE) == 0) {
gst_query_parse_context (query, &old_context);
if (old_context)
context = gst_context_copy (old_context);
else
context = gst_context_new (GST_CUDA_CONTEXT_TYPE, TRUE);
context_set_cuda_context (context, cuda_ctx);
gst_query_set_context (query, context);
gst_context_unref (context);
GST_CAT_DEBUG_OBJECT (GST_CAT_CONTEXT, element,
"successfully set %" GST_PTR_FORMAT " on %" GST_PTR_FORMAT, cuda_ctx,
query);
return TRUE;
}
return FALSE;
}
/**
* gst_context_new_cuda_context:
* @cuda_ctx: (transfer none) a #GstCudaContext
*
* Returns: (transfer full) (nullable): a new #GstContext embedding the @cuda_ctx
* or %NULL
*/
GstContext *
gst_context_new_cuda_context (GstCudaContext * cuda_ctx)
{
GstContext *context;
g_return_val_if_fail (GST_IS_CUDA_CONTEXT (cuda_ctx), NULL);
context = gst_context_new (GST_CUDA_CONTEXT_TYPE, TRUE);
context_set_cuda_context (context, cuda_ctx);
return context;
}
static const gchar *gst_cuda_quark_strings[] =
{ "GstCudaQuarkGraphicsResource" };
static GQuark gst_cuda_quark_table[GST_CUDA_QUARK_MAX];
static void
init_cuda_quark_once (void)
{
static volatile gsize once_init = 0;
if (g_once_init_enter (&once_init)) {
gint i;
for (i = 0; i < GST_CUDA_QUARK_MAX; i++) {
gst_cuda_quark_table[i] =
g_quark_from_static_string (gst_cuda_quark_strings[i]);
g_once_init_leave (&once_init, 1);
}
}
}
/**
* gst_cuda_quark_from_id: (skip)
* @id: a #GstCudaQuarkId
*
* Returns: the GQuark for given @id or 0 if @id is unknown value
*/
GQuark
gst_cuda_quark_from_id (GstCudaQuarkId id)
{
g_return_val_if_fail (id < GST_CUDA_QUARK_MAX, 0);
init_cuda_quark_once ();
_init_debug ();
return gst_cuda_quark_table[id];
}
/**
* gst_cuda_graphics_resource_new: (skip)
* @context: (transfer none): a #GstCudaContext
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* @graphics_context: (transfer none) (nullable): a graphics API specific context object
* @type: a #GstCudaGraphicsResourceType of resource registration
*
* Create new #GstCudaGraphicsResource with given @context and @type
*
* Returns: a new #GstCudaGraphicsResource.
* Free with gst_cuda_graphics_resource_free
*/
GstCudaGraphicsResource *
gst_cuda_graphics_resource_new (GstCudaContext *
context, GstObject * graphics_context, GstCudaGraphicsResourceType type)
{
GstCudaGraphicsResource *resource;
g_return_val_if_fail (GST_IS_CUDA_CONTEXT (context), NULL);
_init_debug ();
resource = g_new0 (GstCudaGraphicsResource, 1);
resource->cuda_context = gst_object_ref (context);
if (graphics_context)
resource->graphics_context = gst_object_ref (graphics_context);
return resource;
}
/**
* gst_cuda_graphics_resource_register_gl_buffer: (skip)
* @resource a #GstCudaGraphicsResource
* @buffer: a GL buffer object
* @flags: a #CUgraphicsRegisterFlags
*
* Register the @buffer for access by CUDA.
* Must be called from the gl context thread with current cuda context was
* pushed on the current thread
*
* Returns: whether @buffer was registered or not
*/
gboolean
gst_cuda_graphics_resource_register_gl_buffer (GstCudaGraphicsResource *
resource, guint buffer, CUgraphicsRegisterFlags flags)
{
CUresult cuda_ret;
g_return_val_if_fail (resource != NULL, FALSE);
g_return_val_if_fail (resource->registered == FALSE, FALSE);
_init_debug ();
cuda_ret = CuGraphicsGLRegisterBuffer (&resource->resource, buffer, flags);
if (!gst_cuda_result (cuda_ret))
return FALSE;
resource->registered = TRUE;
resource->type = GST_CUDA_GRAPHICS_RESOURCE_GL_BUFFER;
resource->flags = flags;
return TRUE;
}
/**
* gst_cuda_graphics_resource_unregister: (skip)
* @resource: a #GstCudaGraphicsResource
*
* Unregister previously registered resource.
* For GL resource, this method must be called from gl context thread.
* Also, current cuda context should be pushed on the current thread
* before calling this method.
*/
void
gst_cuda_graphics_resource_unregister (GstCudaGraphicsResource * resource)
{
g_return_if_fail (resource != NULL);
_init_debug ();
if (!resource->registered)
return;
gst_cuda_result (CuGraphicsUnregisterResource (resource->resource));
resource->resource = NULL;
resource->registered = FALSE;
return;
}
/**
* gst_cuda_graphics_resource_map: (skip)
* @resource: a #GstCudaGraphicsResource
* @stream: a #CUstream
* @flags: a #CUgraphicsMapResourceFlags
*
* Map previously registered resource with map flags
*
* Returns: the #CUgraphicsResource if successful or %NULL when failed
*/
CUgraphicsResource
gst_cuda_graphics_resource_map (GstCudaGraphicsResource * resource,
CUstream stream, CUgraphicsMapResourceFlags flags)
{
CUresult cuda_ret;
g_return_val_if_fail (resource != NULL, NULL);
g_return_val_if_fail (resource->registered != FALSE, NULL);
_init_debug ();
cuda_ret = CuGraphicsResourceSetMapFlags (resource->resource, flags);
if (!gst_cuda_result (cuda_ret))
return NULL;
cuda_ret = CuGraphicsMapResources (1, &resource->resource, stream);
if (!gst_cuda_result (cuda_ret))
return NULL;
resource->mapped = TRUE;
return resource->resource;
}
/**
* gst_cuda_graphics_resource_unmap: (skip)
* @resource: a #GstCudaGraphicsResource
* @stream: a #CUstream
*
* Unmap previously mapped resource
*/
void
gst_cuda_graphics_resource_unmap (GstCudaGraphicsResource * resource,
CUstream stream)
{
g_return_if_fail (resource != NULL);
g_return_if_fail (resource->registered != FALSE);
_init_debug ();
if (!resource->mapped)
return;
gst_cuda_result (CuGraphicsUnmapResources (1, &resource->resource, stream));
resource->mapped = FALSE;
}
#ifdef HAVE_NVCODEC_GST_GL
static void
unregister_resource_from_gl_thread (GstGLContext * gl_context,
GstCudaGraphicsResource * resource)
{
GstCudaContext *cuda_context = resource->cuda_context;
if (!gst_cuda_context_push (cuda_context)) {
GST_WARNING_OBJECT (cuda_context, "failed to push CUDA context");
return;
}
gst_cuda_graphics_resource_unregister (resource);
if (!gst_cuda_context_pop (NULL)) {
GST_WARNING_OBJECT (cuda_context, "failed to pop CUDA context");
}
}
#endif
/**
* gst_cuda_graphics_resource_free: (skip)
* @resource: a #GstCudaGraphicsResource
*
* Free @resource
*/
void
gst_cuda_graphics_resource_free (GstCudaGraphicsResource * resource)
{
g_return_if_fail (resource != NULL);
if (resource->registered) {
#ifdef HAVE_NVCODEC_GST_GL
if (resource->type == GST_CUDA_GRAPHICS_RESOURCE_GL_BUFFER) {
gst_gl_context_thread_add ((GstGLContext *) resource->graphics_context,
(GstGLContextThreadFunc) unregister_resource_from_gl_thread,
resource);
} else
#endif
{
/* FIXME: currently opengl only */
g_assert_not_reached ();
}
}
gst_object_unref (resource->cuda_context);
if (resource->graphics_context)
gst_object_unref (resource->graphics_context);
g_free (resource);
}