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plugin: Add clapper GStreamer plugin

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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.
This commit is contained in:
Rafał Dzięgiel
2022-03-05 09:16:10 +01:00
parent f771e0320c
commit 0061e133f9
21 changed files with 2976 additions and 37 deletions
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128
lib/gst/plugin/gstclapperimport.c vendored Normal file
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/*
* Copyright (C) 2022 Rafał Dzięgiel <rafostar.github@gmail.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 "gstclapperimport.h"
#include "gstclappergdkmemory.h"
#include "gstgtkutils.h"
#define GST_CAT_DEFAULT gst_clapper_import_debug
GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
static GstStaticPadTemplate gst_clapper_import_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (
GST_VIDEO_CAPS_MAKE ("{ " GST_CLAPPER_GDK_MEMORY_FORMATS " }")));
static GstStaticPadTemplate gst_clapper_import_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (
GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_CLAPPER_GDK_MEMORY,
"{ " GST_CLAPPER_GDK_MEMORY_FORMATS " }")));
#define parent_class gst_clapper_import_parent_class
G_DEFINE_TYPE (GstClapperImport, gst_clapper_import, GST_TYPE_CLAPPER_BASE_IMPORT);
GST_ELEMENT_REGISTER_DEFINE (clapperimport, "clapperimport", GST_RANK_NONE,
GST_TYPE_CLAPPER_IMPORT);
static GstBufferPool *
gst_clapper_import_create_upstream_pool (GstClapperBaseImport *bi, GstStructure **config)
{
GstClapperImport *self = GST_CLAPPER_IMPORT_CAST (bi);
GstBufferPool *pool;
GST_DEBUG_OBJECT (self, "Creating new upstream pool");
pool = gst_video_buffer_pool_new ();
*config = gst_buffer_pool_get_config (pool);
return pool;
}
static void
video_frame_unmap_and_free (GstVideoFrame *frame)
{
gst_video_frame_unmap (frame);
g_slice_free (GstVideoFrame, frame);
}
static GstFlowReturn
gst_clapper_import_transform (GstBaseTransform *bt,
GstBuffer *in_buf, GstBuffer *out_buf)
{
GstClapperBaseImport *bi = GST_CLAPPER_BASE_IMPORT_CAST (bt);
GstVideoFrame *frame;
GstMapInfo info;
GstMemory *memory;
frame = g_slice_new (GstVideoFrame);
if (!gst_clapper_base_import_map_buffers (bi, in_buf, out_buf,
GST_MAP_READ, GST_MAP_WRITE, frame, &info, &memory)) {
g_slice_free (GstVideoFrame, frame);
return GST_FLOW_ERROR;
}
/* Keep frame data alive as long as necessary,
* unmap only after bytes are destroyed */
GST_CLAPPER_GDK_MEMORY_CAST (memory)->texture = gst_video_frame_into_gdk_texture (
frame, (GDestroyNotify) video_frame_unmap_and_free);
gst_memory_unmap (memory, &info);
return GST_FLOW_OK;
}
static void
gst_clapper_import_init (GstClapperImport *self)
{
}
static void
gst_clapper_import_class_init (GstClapperImportClass *klass)
{
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstBaseTransformClass *gstbasetransform_class = (GstBaseTransformClass *) klass;
GstClapperBaseImportClass *bi_class = (GstClapperBaseImportClass *) klass;
GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "clapperimport", 0,
"Clapper Import");
gstbasetransform_class->transform = gst_clapper_import_transform;
bi_class->create_upstream_pool = gst_clapper_import_create_upstream_pool;
gst_element_class_set_metadata (gstelement_class,
"Clapper import",
"Filter/Video", "Imports RAW video data into ClapperGdkMemory",
"Rafał Dzięgiel <rafostar.github@gmail.com>");
gst_element_class_add_static_pad_template (gstelement_class,
&gst_clapper_import_sink_template);
gst_element_class_add_static_pad_template (gstelement_class,
&gst_clapper_import_src_template);
}