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248 lines
7 KiB
C
248 lines
7 KiB
C
/*
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* GStreamer
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* Copyright (C) 2016 Matthew Waters <matthew@centricular.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstvkbufferpool.h"
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/**
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* SECTION:vkbufferpool
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* @title: GstVulkanBufferPool
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* @short_description: buffer pool for #GstVulkanBufferMemory objects
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* @see_also: #GstBufferPool, #GstVulkanBufferMemory
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*
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* a #GstVulkanBufferPool is an object that allocates buffers with #GstVulkanBufferMemory
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*
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* A #GstVulkanBufferPool is created with gst_vulkan_buffer_pool_new()
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*
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* #GstVulkanBufferPool implements the VideoMeta buffer pool option
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* #GST_BUFFER_POOL_OPTION_VIDEO_META
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*/
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/* bufferpool */
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struct _GstVulkanBufferPoolPrivate
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{
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GstCaps *caps;
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GstVideoInfo v_info;
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gboolean add_videometa;
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gsize alloc_sizes[GST_VIDEO_MAX_PLANES];
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};
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static void gst_vulkan_buffer_pool_finalize (GObject * object);
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_VULKAN_BUFFER_POOL);
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#define GST_CAT_DEFAULT GST_CAT_VULKAN_BUFFER_POOL
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#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
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G_DEFINE_TYPE_WITH_CODE (GstVulkanBufferPool, gst_vulkan_buffer_pool,
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GST_TYPE_BUFFER_POOL, G_ADD_PRIVATE (GstVulkanBufferPool)
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GST_DEBUG_CATEGORY_INIT (GST_CAT_VULKAN_BUFFER_POOL,
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"vulkanbufferpool", 0, "Vulkan Buffer Pool"));
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static const gchar **
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gst_vulkan_buffer_pool_get_options (GstBufferPool * pool)
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{
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static const gchar *options[] = { GST_BUFFER_POOL_OPTION_VIDEO_META,
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NULL
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};
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return options;
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}
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static gboolean
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gst_vulkan_buffer_pool_set_config (GstBufferPool * pool, GstStructure * config)
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{
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GstVulkanBufferPool *vk_pool = GST_VULKAN_BUFFER_POOL_CAST (pool);
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GstVulkanBufferPoolPrivate *priv = GET_PRIV (vk_pool);
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guint min_buffers, max_buffers;
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GstCaps *caps = NULL;
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gboolean ret = TRUE;
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guint i;
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if (!gst_buffer_pool_config_get_params (config, &caps, NULL, &min_buffers,
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&max_buffers))
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goto wrong_config;
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if (caps == NULL)
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goto no_caps;
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/* now parse the caps from the config */
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if (!gst_video_info_from_caps (&priv->v_info, caps))
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goto wrong_caps;
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GST_LOG_OBJECT (pool, "%dx%d, caps %" GST_PTR_FORMAT, priv->v_info.width,
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priv->v_info.height, caps);
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gst_caps_replace (&priv->caps, caps);
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/* get the size of the buffer to allocate */
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priv->v_info.size = 0;
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for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&priv->v_info); i++) {
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priv->alloc_sizes[i] = GST_VIDEO_INFO_COMP_HEIGHT (&priv->v_info, i) *
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GST_VIDEO_INFO_PLANE_STRIDE (&priv->v_info, i);
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priv->v_info.offset[i] = priv->v_info.size;
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priv->v_info.size += priv->alloc_sizes[i];
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}
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priv->add_videometa = gst_buffer_pool_config_has_option (config,
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GST_BUFFER_POOL_OPTION_VIDEO_META);
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gst_buffer_pool_config_set_params (config, caps,
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priv->v_info.size, min_buffers, max_buffers);
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return GST_BUFFER_POOL_CLASS (parent_class)->set_config (pool, config) && ret;
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/* ERRORS */
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wrong_config:
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{
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GST_WARNING_OBJECT (pool, "invalid config");
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return FALSE;
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}
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no_caps:
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{
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GST_WARNING_OBJECT (pool, "no caps in config");
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return FALSE;
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}
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wrong_caps:
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{
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GST_WARNING_OBJECT (pool,
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"failed getting geometry from caps %" GST_PTR_FORMAT, caps);
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return FALSE;
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}
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}
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/* This function handles GstBuffer creation */
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static GstFlowReturn
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gst_vulkan_buffer_pool_alloc (GstBufferPool * pool, GstBuffer ** buffer,
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GstBufferPoolAcquireParams * params)
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{
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GstVulkanBufferPool *vk_pool = GST_VULKAN_BUFFER_POOL_CAST (pool);
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GstVulkanBufferPoolPrivate *priv = GET_PRIV (vk_pool);
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GstBuffer *buf;
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guint i;
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if (!(buf = gst_buffer_new ())) {
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goto no_buffer;
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}
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for (i = 0; i < GST_VIDEO_INFO_N_PLANES (&priv->v_info); i++) {
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GstMemory *mem;
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mem = gst_vulkan_buffer_memory_alloc (vk_pool->device, priv->alloc_sizes[i],
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/* FIXME: choose from outside */
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VK_BUFFER_USAGE_TRANSFER_SRC_BIT | VK_BUFFER_USAGE_TRANSFER_DST_BIT,
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/* FIXME: choose from outside */
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VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT);
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if (!mem) {
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gst_buffer_unref (buf);
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goto mem_create_failed;
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}
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gst_buffer_append_memory (buf, mem);
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}
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gst_buffer_add_video_meta_full (buf, 0,
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GST_VIDEO_INFO_FORMAT (&priv->v_info),
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GST_VIDEO_INFO_WIDTH (&priv->v_info),
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GST_VIDEO_INFO_HEIGHT (&priv->v_info),
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GST_VIDEO_INFO_N_PLANES (&priv->v_info), priv->v_info.offset,
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priv->v_info.stride);
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*buffer = buf;
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return GST_FLOW_OK;
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/* ERROR */
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no_buffer:
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{
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GST_WARNING_OBJECT (pool, "can't create image");
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return GST_FLOW_ERROR;
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}
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mem_create_failed:
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{
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GST_WARNING_OBJECT (pool, "Could not create Vulkan Memory");
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return GST_FLOW_ERROR;
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}
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}
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/**
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* 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
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*
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* Since: 1.18
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*/
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GstBufferPool *
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gst_vulkan_buffer_pool_new (GstVulkanDevice * device)
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{
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GstVulkanBufferPool *pool;
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pool = g_object_new (GST_TYPE_VULKAN_BUFFER_POOL, NULL);
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g_object_ref_sink (pool);
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pool->device = gst_object_ref (device);
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GST_LOG_OBJECT (pool, "new Vulkan buffer pool for device %" GST_PTR_FORMAT,
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device);
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return GST_BUFFER_POOL_CAST (pool);
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}
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static void
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gst_vulkan_buffer_pool_class_init (GstVulkanBufferPoolClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstBufferPoolClass *gstbufferpool_class = (GstBufferPoolClass *) klass;
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gobject_class->finalize = gst_vulkan_buffer_pool_finalize;
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gstbufferpool_class->get_options = gst_vulkan_buffer_pool_get_options;
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gstbufferpool_class->set_config = gst_vulkan_buffer_pool_set_config;
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gstbufferpool_class->alloc_buffer = gst_vulkan_buffer_pool_alloc;
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}
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static void
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gst_vulkan_buffer_pool_init (GstVulkanBufferPool * pool)
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{
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}
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static void
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gst_vulkan_buffer_pool_finalize (GObject * object)
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{
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GstVulkanBufferPool *pool = GST_VULKAN_BUFFER_POOL_CAST (object);
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GstVulkanBufferPoolPrivate *priv = GET_PRIV (pool);
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GST_LOG_OBJECT (pool, "finalize Vulkan buffer pool %p", pool);
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if (priv->caps)
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gst_caps_unref (priv->caps);
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G_OBJECT_CLASS (gst_vulkan_buffer_pool_parent_class)->finalize (object);
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/* only release the context once all our memory have been deleted */
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if (pool->device) {
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gst_object_unref (pool->device);
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pool->device = NULL;
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}
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}
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