gstreamer/subprojects/gst-plugins-bad/gst-libs/gst/cuda/gstcudabufferpool.c
Thibault Saunier c033f8fad2 cuda: Factor out a public GstCUDA library
So applications and elements implemented outside GStreamer can reuse
our infrastructure

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1472>
2022-04-19 16:39:43 +00:00

192 lines
5.3 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 "gstcudabufferpool.h"
#include "gstcudacontext.h"
#include "gstcudamemory.h"
GST_DEBUG_CATEGORY_STATIC (gst_cuda_buffer_pool_debug);
#define GST_CAT_DEFAULT gst_cuda_buffer_pool_debug
struct _GstCudaBufferPoolPrivate
{
GstCudaAllocator *allocator;
GstVideoInfo info;
};
#define gst_cuda_buffer_pool_parent_class parent_class
G_DEFINE_TYPE_WITH_PRIVATE (GstCudaBufferPool, gst_cuda_buffer_pool,
GST_TYPE_BUFFER_POOL);
static const gchar **
gst_cuda_buffer_pool_get_options (GstBufferPool * pool)
{
static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META, NULL
};
return options;
}
static gboolean
gst_cuda_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)
{
GstCudaBufferPool *self = GST_CUDA_BUFFER_POOL (pool);
GstCudaBufferPoolPrivate *priv = self->priv;
GstCaps *caps = NULL;
guint size, min_buffers, max_buffers;
GstVideoInfo info;
GstMemory *mem;
GstCudaMemory *cmem;
if (!gst_buffer_pool_config_get_params (config, &caps, &size, &min_buffers,
&max_buffers)) {
GST_WARNING_OBJECT (self, "invalid config");
return FALSE;
}
if (!caps) {
GST_WARNING_OBJECT (pool, "no caps in config");
return FALSE;
}
if (!gst_video_info_from_caps (&info, caps)) {
GST_WARNING_OBJECT (self, "Failed to convert caps to video-info");
return FALSE;
}
gst_clear_object (&priv->allocator);
priv->allocator = (GstCudaAllocator *)
gst_allocator_find (GST_CUDA_MEMORY_TYPE_NAME);
if (!priv->allocator) {
GST_WARNING_OBJECT (self, "CudaAllocator is unavailable");
return FALSE;
}
mem = gst_cuda_allocator_alloc (priv->allocator, self->context, &info);
if (!mem) {
GST_WARNING_OBJECT (self, "Failed to allocate memory");
return FALSE;
}
cmem = GST_CUDA_MEMORY_CAST (mem);
gst_buffer_pool_config_set_params (config, caps,
GST_VIDEO_INFO_SIZE (&cmem->info), min_buffers, max_buffers);
priv->info = info;
gst_memory_unref (mem);
return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config);
}
static GstFlowReturn
gst_cuda_buffer_pool_alloc (GstBufferPool * pool, GstBuffer ** buffer,
GstBufferPoolAcquireParams * params)
{
GstCudaBufferPool *self = GST_CUDA_BUFFER_POOL_CAST (pool);
GstCudaBufferPoolPrivate *priv = self->priv;
GstVideoInfo *info = &priv->info;
GstBuffer *buf;
GstMemory *mem;
GstCudaMemory *cmem;
mem = gst_cuda_allocator_alloc (priv->allocator, self->context, &priv->info);
if (!mem) {
GST_WARNING_OBJECT (pool, "Cannot create CUDA memory");
return GST_FLOW_ERROR;
}
cmem = GST_CUDA_MEMORY_CAST (mem);
buf = gst_buffer_new ();
gst_buffer_append_memory (buf, mem);
GST_DEBUG_OBJECT (pool, "adding GstVideoMeta");
gst_buffer_add_video_meta_full (buf, GST_VIDEO_FRAME_FLAG_NONE,
GST_VIDEO_INFO_FORMAT (info), GST_VIDEO_INFO_WIDTH (info),
GST_VIDEO_INFO_HEIGHT (info), GST_VIDEO_INFO_N_PLANES (info),
cmem->info.offset, cmem->info.stride);
*buffer = buf;
return GST_FLOW_OK;
}
/**
* gst_cuda_buffer_pool_new:
* @context: The #GstCudaContext to use for the new buffer pool
*
* Returns: A newly created #GstCudaBufferPool
*
* Since: 1.22
*/
GstBufferPool *
gst_cuda_buffer_pool_new (GstCudaContext * context)
{
GstCudaBufferPool *self;
g_return_val_if_fail (GST_IS_CUDA_CONTEXT (context), NULL);
self = g_object_new (GST_TYPE_CUDA_BUFFER_POOL, NULL);
gst_object_ref_sink (self);
self->context = gst_object_ref (context);
return GST_BUFFER_POOL_CAST (self);
}
static void
gst_cuda_buffer_pool_dispose (GObject * object)
{
GstCudaBufferPool *self = GST_CUDA_BUFFER_POOL_CAST (object);
GstCudaBufferPoolPrivate *priv = self->priv;
gst_clear_object (&priv->allocator);
gst_clear_object (&self->context);
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static void
gst_cuda_buffer_pool_class_init (GstCudaBufferPoolClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBufferPoolClass *bufferpool_class = (GstBufferPoolClass *) klass;
gobject_class->dispose = gst_cuda_buffer_pool_dispose;
bufferpool_class->get_options = gst_cuda_buffer_pool_get_options;
bufferpool_class->set_config = gst_cuda_buffer_pool_set_config;
bufferpool_class->alloc_buffer = gst_cuda_buffer_pool_alloc;
GST_DEBUG_CATEGORY_INIT (gst_cuda_buffer_pool_debug, "cudabufferpool", 0,
"CUDA Buffer Pool");
}
static void
gst_cuda_buffer_pool_init (GstCudaBufferPool * pool)
{
pool->priv = gst_cuda_buffer_pool_get_instance_private (pool);
}