gstreamer/sys/nvcodec/gstcudacontext.c
Seungha Yang 094e4a9f5c nvcodec: Introduce NVIDA CUDA helpers
New object and helper functions can remove duplicated code
from nvenc/nvdec. Also this is prework for CUDA device context sharing
among nvdec(s)/nvenc(s).
2019-08-07 00:59:36 +00:00

276 lines
7.7 KiB
C

/* 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 "gstcudaloader.h"
#include "gstcudacontext.h"
#include "gstcudautils.h"
GST_DEBUG_CATEGORY_STATIC (gst_cuda_context_debug);
#define GST_CAT_DEFAULT gst_cuda_context_debug
enum
{
PROP_0,
PROP_DEVICE_ID
};
#define DEFAULT_DEVICE_ID -1
struct _GstCudaContextPrivate
{
CUcontext context;
CUdevice device;
gint device_id;
};
#define gst_cuda_context_parent_class parent_class
G_DEFINE_TYPE_WITH_PRIVATE (GstCudaContext, gst_cuda_context, GST_TYPE_OBJECT);
static void gst_cuda_context_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_cuda_context_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_cuda_context_constructed (GObject * object);
static void gst_cuda_context_finalize (GObject * object);
static void
gst_cuda_context_class_init (GstCudaContextClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = gst_cuda_context_set_property;
gobject_class->get_property = gst_cuda_context_get_property;
gobject_class->constructed = gst_cuda_context_constructed;
gobject_class->finalize = gst_cuda_context_finalize;
g_object_class_install_property (gobject_class, PROP_DEVICE_ID,
g_param_spec_int ("cuda-device-id", "Cuda Device ID",
"Set the GPU device to use for operations (-1 = auto)",
-1, G_MAXINT, DEFAULT_DEVICE_ID,
G_PARAM_CONSTRUCT_ONLY | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
GST_DEBUG_CATEGORY_INIT (gst_cuda_context_debug,
"cudacontext", 0, "CUDA Context");
}
static void
gst_cuda_context_init (GstCudaContext * context)
{
GstCudaContextPrivate *priv = gst_cuda_context_get_instance_private (context);
priv->context = NULL;
priv->device_id = DEFAULT_DEVICE_ID;
context->priv = priv;
}
static void
gst_cuda_context_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstCudaContext *context = GST_CUDA_CONTEXT (object);
GstCudaContextPrivate *priv = context->priv;
switch (prop_id) {
case PROP_DEVICE_ID:
priv->device_id = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_cuda_context_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstCudaContext *context = GST_CUDA_CONTEXT (object);
GstCudaContextPrivate *priv = context->priv;
switch (prop_id) {
case PROP_DEVICE_ID:
g_value_set_int (value, priv->device_id);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_cuda_context_constructed (GObject * object)
{
static volatile gsize once = 0;
GstCudaContext *context = GST_CUDA_CONTEXT (object);
GstCudaContextPrivate *priv = context->priv;
CUcontext cuda_ctx, old_ctx;
gboolean ret = TRUE;
CUdevice cdev = 0, cuda_dev = -1;
gint dev_count = 0;
gchar name[256];
gint min = 0, maj = 0;
gint i;
if (g_once_init_enter (&once)) {
if (CuInit (0) != CUDA_SUCCESS) {
GST_ERROR_OBJECT (context, "Failed to cuInit");
ret = FALSE;
}
g_once_init_leave (&once, ret);
if (!ret)
return;
}
if (!gst_cuda_result (CuDeviceGetCount (&dev_count)) || dev_count == 0) {
GST_WARNING ("No CUDA devices detected");
return;
}
for (i = 0; i < dev_count; ++i) {
if (gst_cuda_result (CuDeviceGet (&cdev, i)) &&
gst_cuda_result (CuDeviceGetName (name, sizeof (name), cdev)) &&
gst_cuda_result (CuDeviceGetAttribute (&maj,
CU_DEVICE_ATTRIBUTE_COMPUTE_CAPABILITY_MAJOR, cdev)) &&
gst_cuda_result (CuDeviceGetAttribute (&min,
CU_DEVICE_ATTRIBUTE_COMPUTE_CAPABILITY_MINOR, cdev))) {
GST_INFO ("GPU #%d supports NVENC: %s (%s) (Compute SM %d.%d)", i,
(((maj << 4) + min) >= 0x30) ? "yes" : "no", name, maj, min);
if (priv->device_id == -1 || priv->device_id == cdev) {
priv->device_id = cuda_dev = cdev;
}
}
}
if (cuda_dev == -1) {
GST_WARNING ("Device with id %d does not exist", priv->device_id);
return;
}
GST_DEBUG ("Creating cuda context for device index %d", cuda_dev);
if (!gst_cuda_result (CuCtxCreate (&cuda_ctx, 0, cuda_dev))) {
GST_WARNING ("Failed to create CUDA context for cuda device %d", cuda_dev);
return;
}
if (!gst_cuda_result (CuCtxPopCurrent (&old_ctx))) {
return;
}
GST_INFO ("Created CUDA context %p with device-id %d", cuda_ctx, cuda_dev);
priv->context = cuda_ctx;
priv->device = cuda_dev;
}
static void
gst_cuda_context_finalize (GObject * object)
{
GstCudaContext *context = GST_CUDA_CONTEXT_CAST (object);
GstCudaContextPrivate *priv = context->priv;
if (priv->context) {
GST_DEBUG_OBJECT (context, "Destroying CUDA context %p", priv->context);
gst_cuda_result (CuCtxDestroy (priv->context));
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
/**
* gst_cuda_context_new:
* @device_id: device-id for creating #GstCudaContext or -1 for auto selection
*
* Create #GstCudaContext with given device_id. If the @device_id was not -1
* but was out of range (e.g., exceed the number of device),
* #GstCudaContext will not be created.
*
* Returns: a new #GstCudaContext or %NULL on failure
*/
GstCudaContext *
gst_cuda_context_new (gint device_id)
{
GstCudaContext *self =
g_object_new (GST_TYPE_CUDA_CONTEXT, "cuda-device-id", device_id, NULL);
gst_object_ref_sink (self);
if (!self->priv->context) {
GST_ERROR ("Failed to create CUDA context");
gst_clear_object (&self);
}
return self;
}
/**
* gst_cuda_context_push:
* @ctx: a #GstCudaContext to push current thread
*
* Pushes the given @ctx onto the CPU thread's stack of current contexts.
* The specified context becomes the CPU thread's current context,
* so all CUDA functions that operate on the current context are affected.
*
* Returns: %TRUE if @ctx was pushed without error.
*/
gboolean
gst_cuda_context_push (GstCudaContext * ctx)
{
g_return_val_if_fail (ctx, FALSE);
g_return_val_if_fail (GST_IS_CUDA_CONTEXT (ctx), FALSE);
return gst_cuda_result (CuCtxPushCurrent (ctx->priv->context));
}
/**
* gst_cuda_context_pop:
*
* Pops the current CUDA context from CPU thread
*
* Returns: %TRUE if @ctx was pushed without error.
*/
gboolean
gst_cuda_context_pop (CUcontext * cuda_ctx)
{
return gst_cuda_result (CuCtxPopCurrent (cuda_ctx));
}
/**
* gst_cuda_context_get_handle:
* @ctx: a #GstCudaContext
*
* Get CUDA device context. Caller must not modify and/or destroy
* returned device context.
*
* Returns: the #CUcontext of @ctx
*/
gpointer
gst_cuda_context_get_handle (GstCudaContext * ctx)
{
g_return_val_if_fail (ctx, NULL);
g_return_val_if_fail (GST_IS_CUDA_CONTEXT (ctx), NULL);
return ctx->priv->context;
}