mirror of
https://github.com/Rafostar/clapper.git
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0061e133f9
Add new GStreamer plugin that consists of multiple elements for Clapper video player. The main difference is that unlike the old one, this does not operate using `GtkGLArea` anymore, but processes and displays `GdkTextures` directly through `GtkPicture` widget. Also this one is installed like any other GStreamer plugin, thus can be used via `gst-launch-1.0` binary or even used by other GTK4 apps if they wish to integrate it. This commit adds new video sink that uses a new kind of memory as input, called `ClapperGdkMemory`. With it comes a simple dedicated memory allocator, buffer pool and a `clapperimport` element that converts system mapped memory frames into `GdkTextures` that are later passed in our `ClapperGdkMemory` for the sink to display.
142 lines
4.0 KiB
C
Vendored
142 lines
4.0 KiB
C
Vendored
/*
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* Copyright (C) 2022 Rafał Dzięgiel <rafostar.github@gmail.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 "gstclappergdkmemory.h"
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#include "gstgtkutils.h"
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#define GST_CAT_DEFAULT gst_clapper_gdk_allocator_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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static GstAllocator *_gst_clapper_gdk_allocator = NULL;
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#define parent_class gst_clapper_gdk_allocator_parent_class
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G_DEFINE_TYPE (GstClapperGdkAllocator, gst_clapper_gdk_allocator, GST_TYPE_ALLOCATOR);
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static void
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gst_clapper_gdk_allocator_free (GstAllocator *self, GstMemory *memory)
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{
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GstClapperGdkMemory *mem = GST_CLAPPER_GDK_MEMORY_CAST (memory);
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GST_TRACE_OBJECT (self, "Freeing ClapperGdkMemory: %" GST_PTR_FORMAT, mem);
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g_clear_object (&mem->texture);
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g_free (mem);
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}
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static gpointer
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gst_clapper_gdk_mem_map_full (GstMemory *memory, GstMapInfo *info, gsize maxsize)
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{
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GstClapperGdkMemory *mem = GST_CLAPPER_GDK_MEMORY_CAST (memory);
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return &mem->texture;
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}
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static void
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gst_clapper_gdk_mem_unmap_full (GstMemory *memory, GstMapInfo *info)
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{
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/* NOOP */
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}
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static GstMemory *
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gst_clapper_gdk_mem_copy (GstMemory *memory, gssize offset, gssize size)
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{
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return NULL;
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}
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static GstMemory *
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gst_clapper_gdk_mem_share (GstMemory *memory, gssize offset, gssize size)
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{
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return NULL;
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}
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static gboolean
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gst_clapper_gdk_mem_is_span (GstMemory *mem1, GstMemory *mem2, gsize *offset)
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{
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return FALSE;
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}
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static void
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gst_clapper_gdk_allocator_init (GstClapperGdkAllocator *self)
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{
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GstAllocator *alloc = GST_ALLOCATOR_CAST (self);
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alloc->mem_type = GST_CLAPPER_GDK_MEMORY_TYPE_NAME;
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alloc->mem_map_full = gst_clapper_gdk_mem_map_full;
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alloc->mem_unmap_full = gst_clapper_gdk_mem_unmap_full;
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alloc->mem_copy = gst_clapper_gdk_mem_copy;
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alloc->mem_share = gst_clapper_gdk_mem_share;
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alloc->mem_is_span = gst_clapper_gdk_mem_is_span;
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GST_OBJECT_FLAG_SET (self, GST_ALLOCATOR_FLAG_CUSTOM_ALLOC);
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}
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static void
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gst_clapper_gdk_allocator_class_init (GstClapperGdkAllocatorClass *klass)
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{
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GstAllocatorClass *allocator_class = (GstAllocatorClass *) klass;
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allocator_class->alloc = NULL;
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allocator_class->free = GST_DEBUG_FUNCPTR (gst_clapper_gdk_allocator_free);
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GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "clappergdkallocator", 0,
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"Clapper Gdk Allocator");
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}
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void
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gst_clapper_gdk_memory_init_once (void)
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{
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static gsize _alloc_init = 0;
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if (g_once_init_enter (&_alloc_init)) {
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_gst_clapper_gdk_allocator = GST_ALLOCATOR_CAST (
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g_object_new (GST_TYPE_CLAPPER_GDK_ALLOCATOR, NULL));
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gst_object_ref_sink (_gst_clapper_gdk_allocator);
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gst_allocator_register (GST_CLAPPER_GDK_MEMORY_TYPE_NAME, _gst_clapper_gdk_allocator);
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g_once_init_leave (&_alloc_init, 1);
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}
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}
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gboolean
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gst_is_clapper_gdk_memory (GstMemory *memory)
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{
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return (memory != NULL && memory->allocator != NULL
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&& GST_IS_CLAPPER_GDK_ALLOCATOR (memory->allocator));
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}
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GstMemory *
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gst_clapper_gdk_allocator_alloc (GstClapperGdkAllocator *self, const GstVideoInfo *info)
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{
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GstClapperGdkMemory *mem;
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mem = g_new0 (GstClapperGdkMemory, 1);
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mem->info = *info;
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gst_memory_init (GST_MEMORY_CAST (mem), 0, GST_ALLOCATOR_CAST (self),
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NULL, GST_VIDEO_INFO_SIZE (info), 0, 0, GST_VIDEO_INFO_SIZE (info));
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GST_TRACE_OBJECT (self, "Allocated new ClapperGdkMemory: %" GST_PTR_FORMAT, mem);
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return GST_MEMORY_CAST (mem);
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}
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