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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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358 lines
11 KiB
C
358 lines
11 KiB
C
/*
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* GStreamer
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* Copyright (C) 2015 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 <stdio.h>
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#include <gst/gl/gl.h>
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#include "gstglelements.h"
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#include "gstgluploadelement.h"
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GST_DEBUG_CATEGORY_STATIC (gst_gl_upload_element_debug);
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#define GST_CAT_DEFAULT gst_gl_upload_element_debug
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#define gst_gl_upload_element_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstGLUploadElement, gst_gl_upload_element,
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GST_TYPE_GL_BASE_FILTER,
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GST_DEBUG_CATEGORY_INIT (gst_gl_upload_element_debug, "gluploadelement", 0,
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"glupload Element"););
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (glupload, "glupload",
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GST_RANK_NONE, GST_TYPE_GL_UPLOAD_ELEMENT, gl_element_init (plugin));
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static gboolean gst_gl_upload_element_get_unit_size (GstBaseTransform * trans,
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GstCaps * caps, gsize * size);
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static GstCaps *_gst_gl_upload_element_transform_caps (GstBaseTransform * bt,
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GstPadDirection direction, GstCaps * caps, GstCaps * filter);
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static gboolean _gst_gl_upload_element_set_caps (GstBaseTransform * bt,
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GstCaps * in_caps, GstCaps * out_caps);
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static gboolean gst_gl_upload_element_filter_meta (GstBaseTransform * trans,
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GstQuery * query, GType api, const GstStructure * params);
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static gboolean _gst_gl_upload_element_propose_allocation (GstBaseTransform *
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bt, GstQuery * decide_query, GstQuery * query);
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static gboolean _gst_gl_upload_element_decide_allocation (GstBaseTransform *
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trans, GstQuery * query);
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static GstFlowReturn
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gst_gl_upload_element_prepare_output_buffer (GstBaseTransform * bt,
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GstBuffer * buffer, GstBuffer ** outbuf);
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static GstFlowReturn gst_gl_upload_element_transform (GstBaseTransform * bt,
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GstBuffer * buffer, GstBuffer * outbuf);
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static gboolean gst_gl_upload_element_stop (GstBaseTransform * bt);
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static GstStateChangeReturn
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gst_gl_upload_element_change_state (GstElement * element,
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GstStateChange transition);
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static GstStaticPadTemplate gst_gl_upload_element_src_pad_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 ("video/x-raw(ANY)"));
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static void
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_gst_gl_upload_element_clear_upload (GstGLUploadElement * upload)
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{
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GstGLUpload *ul = NULL;
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GST_OBJECT_LOCK (upload);
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ul = upload->upload;
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upload->upload = NULL;
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GST_OBJECT_UNLOCK (upload);
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if (ul)
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gst_object_unref (ul);
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}
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static void
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gst_gl_upload_element_finalize (GObject * object)
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{
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GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (object);
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_gst_gl_upload_element_clear_upload (upload);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_gl_upload_element_class_init (GstGLUploadElementClass * klass)
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{
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GstBaseTransformClass *bt_class = GST_BASE_TRANSFORM_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstCaps *upload_caps;
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bt_class->transform_caps = _gst_gl_upload_element_transform_caps;
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bt_class->set_caps = _gst_gl_upload_element_set_caps;
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bt_class->filter_meta = gst_gl_upload_element_filter_meta;
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bt_class->propose_allocation = _gst_gl_upload_element_propose_allocation;
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bt_class->decide_allocation = _gst_gl_upload_element_decide_allocation;
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bt_class->get_unit_size = gst_gl_upload_element_get_unit_size;
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bt_class->prepare_output_buffer = gst_gl_upload_element_prepare_output_buffer;
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bt_class->transform = gst_gl_upload_element_transform;
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bt_class->stop = gst_gl_upload_element_stop;
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element_class->change_state = gst_gl_upload_element_change_state;
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gst_element_class_add_static_pad_template (element_class,
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&gst_gl_upload_element_src_pad_template);
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upload_caps = gst_gl_upload_get_input_template_caps ();
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gst_element_class_add_pad_template (element_class,
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gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, upload_caps));
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gst_caps_unref (upload_caps);
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gst_element_class_set_metadata (element_class,
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"OpenGL uploader", "Filter/Video",
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"Uploads data into OpenGL", "Matthew Waters <matthew@centricular.com>");
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gobject_class->finalize = gst_gl_upload_element_finalize;
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}
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static void
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gst_gl_upload_element_init (GstGLUploadElement * upload)
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{
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gst_base_transform_set_prefer_passthrough (GST_BASE_TRANSFORM (upload), TRUE);
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}
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static gboolean
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gst_gl_upload_element_stop (GstBaseTransform * bt)
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{
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GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
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_gst_gl_upload_element_clear_upload (upload);
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return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (bt);
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}
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static gboolean
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gst_gl_upload_element_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
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gsize * size)
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{
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gboolean ret = FALSE;
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GstVideoInfo info;
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ret = gst_video_info_from_caps (&info, caps);
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if (ret)
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*size = GST_VIDEO_INFO_SIZE (&info);
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return TRUE;
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}
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static GstCaps *
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_gst_gl_upload_element_transform_caps (GstBaseTransform * bt,
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GstPadDirection direction, GstCaps * caps, GstCaps * filter)
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{
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GstGLBaseFilter *base_filter = GST_GL_BASE_FILTER (bt);
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GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
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GstGLContext *context;
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GstGLUpload *ul = NULL;
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GstCaps *ret_caps;
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if (base_filter->display && !gst_gl_base_filter_find_gl_context (base_filter))
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return NULL;
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context = gst_gl_base_filter_get_gl_context (base_filter);
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GST_OBJECT_LOCK (upload);
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if (upload->upload == NULL) {
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GST_OBJECT_UNLOCK (upload);
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ul = gst_gl_upload_new (context);
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GST_OBJECT_LOCK (upload);
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if (upload->upload) {
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gst_object_unref (ul);
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ul = upload->upload;
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} else {
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upload->upload = ul;
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}
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} else {
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ul = upload->upload;
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}
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gst_object_ref (ul);
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GST_OBJECT_UNLOCK (upload);
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ret_caps =
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gst_gl_upload_transform_caps (ul, context, direction, caps, filter);
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gst_object_unref (ul);
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if (context)
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gst_object_unref (context);
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return ret_caps;
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}
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static gboolean
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gst_gl_upload_element_filter_meta (GstBaseTransform * trans, GstQuery * query,
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GType api, const GstStructure * params)
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{
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/* propose all metadata upstream */
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return TRUE;
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}
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static gboolean
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_gst_gl_upload_element_propose_allocation (GstBaseTransform * bt,
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GstQuery * decide_query, GstQuery * query)
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{
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GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
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GstGLUpload *ul;
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GstGLContext *context;
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gboolean ret;
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GST_OBJECT_LOCK (upload);
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if (!upload->upload) {
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GST_OBJECT_UNLOCK (upload);
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return FALSE;
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}
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ul = gst_object_ref (upload->upload);
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GST_OBJECT_UNLOCK (upload);
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context = gst_gl_base_filter_get_gl_context (GST_GL_BASE_FILTER (bt));
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if (!context) {
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gst_object_unref (ul);
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return FALSE;
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}
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gst_gl_upload_set_context (ul, context);
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ret = GST_BASE_TRANSFORM_CLASS (parent_class)->propose_allocation (bt,
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decide_query, query);
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gst_gl_upload_propose_allocation (ul, decide_query, query);
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gst_object_unref (ul);
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gst_object_unref (context);
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return ret;
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}
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static gboolean
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_gst_gl_upload_element_decide_allocation (GstBaseTransform * trans,
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GstQuery * query)
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{
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GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (trans);
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GstGLContext *context = GST_GL_BASE_FILTER (trans)->context;
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if (upload->upload && context)
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gst_gl_upload_set_context (upload->upload, context);
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return
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GST_BASE_TRANSFORM_CLASS
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(gst_gl_upload_element_parent_class)->decide_allocation (trans, query);
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}
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static gboolean
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_gst_gl_upload_element_set_caps (GstBaseTransform * bt, GstCaps * in_caps,
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GstCaps * out_caps)
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{
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GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
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return gst_gl_upload_set_caps (upload->upload, in_caps, out_caps);
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}
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GstFlowReturn
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gst_gl_upload_element_prepare_output_buffer (GstBaseTransform * bt,
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GstBuffer * buffer, GstBuffer ** outbuf)
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{
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GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
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GstGLUploadReturn ret;
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GstBaseTransformClass *bclass;
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bclass = GST_BASE_TRANSFORM_GET_CLASS (bt);
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if (gst_base_transform_is_passthrough (bt)) {
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*outbuf = buffer;
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return GST_FLOW_OK;
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}
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if (!upload->upload)
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return GST_FLOW_NOT_NEGOTIATED;
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again:
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ret = gst_gl_upload_perform_with_buffer (upload->upload, buffer, outbuf);
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if (ret == GST_GL_UPLOAD_RECONFIGURE) {
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GstPad *sinkpad = GST_BASE_TRANSFORM_SINK_PAD (bt);
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GstCaps *incaps = gst_pad_get_current_caps (sinkpad);
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GST_DEBUG_OBJECT (bt,
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"Failed to upload with curren caps -- reconfiguring.");
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/* Note: gst_base_transform_reconfigure_src() cannot be used here.
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* Reconfiguring must be synchronous to avoid dropping the current
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* buffer */
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gst_pad_send_event (sinkpad, gst_event_new_caps (incaps));
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gst_caps_unref (incaps);
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if (!gst_pad_needs_reconfigure (GST_BASE_TRANSFORM_SRC_PAD (bt))) {
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GST_DEBUG_OBJECT (bt, "Retry uploading with new caps");
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goto again;
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}
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return GST_FLOW_OK;
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}
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if (ret != GST_GL_UPLOAD_DONE || *outbuf == NULL) {
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GST_ELEMENT_ERROR (bt, RESOURCE, NOT_FOUND, ("%s",
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"Failed to upload buffer"), (NULL));
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if (*outbuf)
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gst_buffer_unref (*outbuf);
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return GST_FLOW_ERROR;
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}
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/* basetransform doesn't unref if they're the same */
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if (buffer == *outbuf)
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gst_buffer_unref (*outbuf);
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else
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bclass->copy_metadata (bt, buffer, *outbuf);
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return GST_FLOW_OK;
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}
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static GstFlowReturn
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gst_gl_upload_element_transform (GstBaseTransform * bt, GstBuffer * buffer,
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GstBuffer * outbuf)
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{
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return GST_FLOW_OK;
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}
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static GstStateChangeReturn
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gst_gl_upload_element_change_state (GstElement * element,
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GstStateChange transition)
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{
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GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (element);
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GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
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GST_DEBUG_OBJECT (upload, "changing state: %s => %s",
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gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
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gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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if (ret == GST_STATE_CHANGE_FAILURE)
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return ret;
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_NULL:
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_gst_gl_upload_element_clear_upload (upload);
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break;
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default:
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break;
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}
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return ret;
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}
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