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plugin: Add "clapperdmabufimport" element
This commit is contained in:
Rafał Dzięgiel
180
lib/gst/plugin/gstclapperdmabufimport.c
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180
lib/gst/plugin/gstclapperdmabufimport.c
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/*
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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 <gtk/gtk.h>
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#include <gst/allocators/gstdmabuf.h>
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#include "gstclapperdmabufimport.h"
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#include "gstclappergdkmemory.h"
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#define GST_CAT_DEFAULT gst_clapper_dmabuf_import_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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#ifndef GST_CAPS_FEATURE_MEMORY_DMABUF
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#define GST_CAPS_FEATURE_MEMORY_DMABUF "memory:DMABuf"
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#endif
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static GstStaticPadTemplate gst_clapper_dmabuf_import_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (
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GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_DMABUF,
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"{ " GST_CLAPPER_GDK_GL_TEXTURE_FORMATS ", NV12 }")
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"; "
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GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_MEMORY_DMABUF ", "
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GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION,
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"{ " GST_CLAPPER_GDK_GL_TEXTURE_FORMATS ", NV12 }")));
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static GstStaticPadTemplate gst_clapper_dmabuf_import_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (
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GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_CLAPPER_GDK_MEMORY,
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"{ " GST_CLAPPER_GDK_GL_TEXTURE_FORMATS ", NV12 }")
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"; "
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GST_VIDEO_CAPS_MAKE_WITH_FEATURES (GST_CAPS_FEATURE_CLAPPER_GDK_MEMORY ", "
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GST_CAPS_FEATURE_META_GST_VIDEO_OVERLAY_COMPOSITION,
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"{ " GST_CLAPPER_GDK_GL_TEXTURE_FORMATS ", NV12 }")));
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#define parent_class gst_clapper_dmabuf_import_parent_class
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G_DEFINE_TYPE (GstClapperDmabufImport, gst_clapper_dmabuf_import, GST_TYPE_CLAPPER_DMABUF_BASE_IMPORT);
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GST_ELEMENT_REGISTER_DEFINE (clapperdmabufimport, "clapperdmabufimport", GST_RANK_NONE,
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GST_TYPE_CLAPPER_DMABUF_IMPORT);
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static gboolean
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verify_dmabuf_memory (GstBuffer *buffer, GstVideoInfo *info, gint *fds, gsize *offsets)
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{
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guint i, n_planes = GST_VIDEO_INFO_N_PLANES (info);
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for (i = 0; i < n_planes; i++) {
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GstMemory *memory;
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gsize plane_size, mem_skip;
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guint mem_idx, length;
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plane_size = gst_gl_get_plane_data_size (info, NULL, i);
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if (!gst_buffer_find_memory (buffer,
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GST_VIDEO_INFO_PLANE_OFFSET (info, i),
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plane_size, &mem_idx, &length, &mem_skip)) {
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GST_DEBUG ("Could not find memory %u", i);
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return FALSE;
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}
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/* We cannot have more then one DMABuf per plane */
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if (length != 1) {
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GST_DEBUG ("Data for plane %u spans %u memories", i, length);
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return FALSE;
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}
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memory = gst_buffer_peek_memory (buffer, mem_idx);
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offsets[i] = memory->offset + mem_skip;
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fds[i] = gst_dmabuf_memory_get_fd (memory);
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}
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return TRUE;
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}
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static GstBufferPool *
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gst_clapper_dmabuf_import_create_upstream_pool (GstClapperBaseImport *bi, GstStructure **config)
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{
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return NULL;
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}
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static GstFlowReturn
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gst_clapper_dmabuf_import_transform (GstBaseTransform *bt,
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GstBuffer *in_buf, GstBuffer *out_buf)
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{
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GstClapperDmabufBaseImport *dmabuf_bi = GST_CLAPPER_DMABUF_BASE_IMPORT_CAST (bt);
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GstClapperBaseImport *bi = GST_CLAPPER_BASE_IMPORT_CAST (bt);
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GstMapInfo info;
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GstMemory *memory;
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GstVideoMeta *meta;
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GstFlowReturn ret = GST_FLOW_ERROR;
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GST_LOG_OBJECT (bt, "Transforming from %" GST_PTR_FORMAT
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" into %" GST_PTR_FORMAT, in_buf, out_buf);
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if ((meta = gst_buffer_get_video_meta (in_buf))) {
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guint i;
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GST_VIDEO_INFO_WIDTH (&bi->in_info) = meta->width;
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GST_VIDEO_INFO_HEIGHT (&bi->in_info) = meta->height;
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for (i = 0; i < meta->n_planes; i++) {
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GST_VIDEO_INFO_PLANE_OFFSET (&bi->in_info, i) = meta->offset[i];
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GST_VIDEO_INFO_PLANE_STRIDE (&bi->in_info, i) = meta->stride[i];
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}
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}
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memory = gst_buffer_peek_memory (out_buf, 0);
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if (G_LIKELY (gst_memory_map (memory, &info, GST_MAP_WRITE))) {
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gint fds[GST_VIDEO_MAX_PLANES];
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gsize offsets[GST_VIDEO_MAX_PLANES];
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if (verify_dmabuf_memory (in_buf, &bi->in_info, fds, offsets)) {
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GstClapperGdkMemory *clapper_memory = GST_CLAPPER_GDK_MEMORY_CAST (memory);
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if (G_LIKELY ((clapper_memory->texture = gst_clapper_dmabuf_base_import_fds_into_texture (
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dmabuf_bi, fds, offsets))))
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ret = GST_FLOW_OK;
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}
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gst_memory_unmap (memory, &info);
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}
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return ret;
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}
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static void
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gst_clapper_dmabuf_import_init (GstClapperDmabufImport *self)
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{
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}
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static void
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gst_clapper_dmabuf_import_class_init (GstClapperDmabufImportClass *klass)
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{
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GstElementClass *gstelement_class = (GstElementClass *) klass;
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GstBaseTransformClass *gstbasetransform_class = (GstBaseTransformClass *) klass;
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GstClapperBaseImportClass *bi_class = (GstClapperBaseImportClass *) klass;
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GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT, "clapperdmabufimport", 0,
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"Clapper DMABuf Import");
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gstbasetransform_class->transform = gst_clapper_dmabuf_import_transform;
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bi_class->create_upstream_pool = gst_clapper_dmabuf_import_create_upstream_pool;
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gst_element_class_set_metadata (gstelement_class,
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"Clapper DMABuf import",
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"Filter/Video", "Imports DMABuf into ClapperGdkMemory",
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"Rafał Dzięgiel <rafostar.github@gmail.com>");
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_clapper_dmabuf_import_sink_template);
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_clapper_dmabuf_import_src_template);
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}
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