gstreamer/gst-libs/gst/vulkan/gstvkbufferpool.c

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/*
* GStreamer
* Copyright (C) 2016 Matthew Waters <matthew@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 "gstvkbufferpool.h"
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/**
* SECTION:vkbufferpool
* @title: GstVulkanBufferPool
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* @short_description: buffer pool for #GstVulkanBufferMemory objects
* @see_also: #GstBufferPool, #GstVulkanBufferMemory
*
* a #GstVulkanBufferPool is an object that allocates buffers with #GstVulkanBufferMemory
*
* A #GstVulkanBufferPool is created with gst_vulkan_buffer_pool_new()
*
* #GstVulkanBufferPool implements the VideoMeta buffer pool option
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* #GST_BUFFER_POOL_OPTION_VIDEO_META
*/
/* bufferpool */
struct _GstVulkanBufferPoolPrivate
{
GstCaps *caps;
GstVideoInfo v_info;
gboolean add_videometa;
gsize alloc_sizes[GST_VIDEO_MAX_PLANES];
};
static void gst_vulkan_buffer_pool_finalize (GObject * object);
GST_DEBUG_CATEGORY_STATIC (GST_CAT_VULKAN_BUFFER_POOL);
#define GST_CAT_DEFAULT GST_CAT_VULKAN_BUFFER_POOL
#define GET_PRIV(pool) gst_vulkan_buffer_pool_get_instance_private (pool)
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#define gst_vulkan_buffer_pool_parent_class parent_class
G_DEFINE_TYPE_WITH_CODE (GstVulkanBufferPool, gst_vulkan_buffer_pool,
GST_TYPE_BUFFER_POOL, G_ADD_PRIVATE (GstVulkanBufferPool)
GST_DEBUG_CATEGORY_INIT (GST_CAT_VULKAN_BUFFER_POOL,
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"vulkanbufferpool", 0, "Vulkan Buffer Pool"));
static const gchar **
gst_vulkan_buffer_pool_get_options (GstBufferPool * pool)
{
static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META,
NULL
};
return options;
}
static gboolean
gst_vulkan_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)
{
GstVulkanBufferPool *vk_pool = GST_VULKAN_BUFFER_POOL_CAST (pool);
GstVulkanBufferPoolPrivate *priv = GET_PRIV (vk_pool);
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guint min_buffers, max_buffers;
GstCaps *caps = NULL;
gboolean ret = TRUE;
guint i;
if (!gst_buffer_pool_config_get_params (config, &caps, NULL, &min_buffers,
&max_buffers))
goto wrong_config;
if (caps == NULL)
goto no_caps;
/* now parse the caps from the config */
if (!gst_video_info_from_caps (&priv->v_info, caps))
goto wrong_caps;
GST_LOG_OBJECT (pool, "%dx%d, caps %" GST_PTR_FORMAT, priv->v_info.width,
priv->v_info.height, caps);
gst_caps_replace (&priv->caps, caps);
/* get the size of the buffer to allocate */
priv->v_info.size = 0;
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for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&priv->v_info); i++) {
priv->alloc_sizes[i] = GST_VIDEO_INFO_COMP_HEIGHT (&priv->v_info, i) *
GST_VIDEO_INFO_PLANE_STRIDE (&priv->v_info, i);
priv->v_info.offset[i] = priv->v_info.size;
priv->v_info.size += priv->alloc_sizes[i];
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}
priv->add_videometa = gst_buffer_pool_config_has_option (config,
GST_BUFFER_POOL_OPTION_VIDEO_META);
gst_buffer_pool_config_set_params (config, caps,
priv->v_info.size, min_buffers, max_buffers);
return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config) && ret;
/* ERRORS */
wrong_config:
{
GST_WARNING_OBJECT (pool, "invalid config");
return FALSE;
}
no_caps:
{
GST_WARNING_OBJECT (pool, "no caps in config");
return FALSE;
}
wrong_caps:
{
GST_WARNING_OBJECT (pool,
"failed getting geometry from caps %" GST_PTR_FORMAT, caps);
return FALSE;
}
}
/* This function handles GstBuffer creation */
static GstFlowReturn
gst_vulkan_buffer_pool_alloc (GstBufferPool * pool, GstBuffer ** buffer,
GstBufferPoolAcquireParams * params)
{
GstVulkanBufferPool *vk_pool = GST_VULKAN_BUFFER_POOL_CAST (pool);
GstVulkanBufferPoolPrivate *priv = GET_PRIV (vk_pool);
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GstBuffer *buf;
guint i;
if (!(buf = gst_buffer_new ())) {
goto no_buffer;
}
for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&priv->v_info); i++) {
GstMemory *mem;
mem = gst_vulkan_buffer_memory_alloc (vk_pool->device, priv->alloc_sizes[i],
/* FIXME: choose from outside */
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VK_BUFFER_USAGE_TRANSFER_SRC_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT,
/* FIXME: choose from outside */
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT);
if (!mem) {
gst_buffer_unref (buf);
goto mem_create_failed;
}
gst_buffer_append_memory (buf, mem);
}
gst_buffer_add_video_meta_full (buf, 0,
GST_VIDEO_INFO_FORMAT (&priv->v_info),
GST_VIDEO_INFO_WIDTH (&priv->v_info),
GST_VIDEO_INFO_HEIGHT (&priv->v_info),
GST_VIDEO_INFO_N_PLANES (&priv->v_info), priv->v_info.offset,
priv->v_info.stride);
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*buffer = buf;
return GST_FLOW_OK;
/* ERROR */
no_buffer:
{
GST_WARNING_OBJECT (pool, "can't create image");
return GST_FLOW_ERROR;
}
mem_create_failed:
{
GST_WARNING_OBJECT (pool, "Could not create Vulkan Memory");
return GST_FLOW_ERROR;
}
}
/**
* gst_vulkan_buffer_pool_new:
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* @device: the #GstVulkanDevice to use
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*
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* Returns: (transfer full): a #GstBufferPool that allocates buffers with #GstGLMemory
*
* Since: 1.18
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*/
GstBufferPool *
gst_vulkan_buffer_pool_new (GstVulkanDevice * device)
{
GstVulkanBufferPool *pool;
pool = g_object_new (GST_TYPE_VULKAN_BUFFER_POOL, NULL);
g_object_ref_sink (pool);
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pool->device = gst_object_ref (device);
GST_LOG_OBJECT (pool, "new Vulkan buffer pool for device %" GST_PTR_FORMAT,
device);
return GST_BUFFER_POOL_CAST (pool);
}
static void
gst_vulkan_buffer_pool_class_init (GstVulkanBufferPoolClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBufferPoolClass *gstbufferpool_class = (GstBufferPoolClass *) klass;
gobject_class->finalize = gst_vulkan_buffer_pool_finalize;
gstbufferpool_class->get_options = gst_vulkan_buffer_pool_get_options;
gstbufferpool_class->set_config = gst_vulkan_buffer_pool_set_config;
gstbufferpool_class->alloc_buffer = gst_vulkan_buffer_pool_alloc;
}
static void
gst_vulkan_buffer_pool_init (GstVulkanBufferPool * pool)
{
}
static void
gst_vulkan_buffer_pool_finalize (GObject * object)
{
GstVulkanBufferPool *pool = GST_VULKAN_BUFFER_POOL_CAST (object);
GstVulkanBufferPoolPrivate *priv = GET_PRIV (pool);
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GST_LOG_OBJECT (pool, "finalize Vulkan buffer pool %p", pool);
if (priv->caps)
gst_caps_unref (priv->caps);
G_OBJECT_CLASS (gst_vulkan_buffer_pool_parent_class)->finalize (object);
/* only release the context once all our memory have been deleted */
if (pool->device) {
gst_object_unref (pool->device);
pool->device = NULL;
}
}