/* * GStreamer * Copyright (C) 2015 Matthew Waters * * 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 #include #include "gstgluploadelement.h" GST_DEBUG_CATEGORY_STATIC (gst_gl_upload_element_debug); #define GST_CAT_DEFAULT gst_gl_upload_element_debug #define gst_gl_upload_element_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstGLUploadElement, gst_gl_upload_element, GST_TYPE_GL_BASE_FILTER, GST_DEBUG_CATEGORY_INIT (gst_gl_upload_element_debug, "gluploadelement", 0, "glupload Element"); ); static gboolean gst_gl_upload_element_get_unit_size (GstBaseTransform * trans, GstCaps * caps, gsize * size); static gboolean gst_gl_upload_element_query (GstBaseTransform * bt, GstPadDirection direction, GstQuery * query); static GstCaps *_gst_gl_upload_element_transform_caps (GstBaseTransform * bt, GstPadDirection direction, GstCaps * caps, GstCaps * filter); static gboolean _gst_gl_upload_element_set_caps (GstBaseTransform * bt, GstCaps * in_caps, GstCaps * out_caps); static gboolean _gst_gl_upload_element_propose_allocation (GstBaseTransform * bt, GstQuery * decide_query, GstQuery * query); static gboolean _gst_gl_upload_element_decide_allocation (GstBaseTransform * trans, GstQuery * query); static GstFlowReturn gst_gl_upload_element_prepare_output_buffer (GstBaseTransform * bt, GstBuffer * buffer, GstBuffer ** outbuf); static GstFlowReturn gst_gl_upload_element_transform (GstBaseTransform * bt, GstBuffer * buffer, GstBuffer * outbuf); static gboolean gst_gl_upload_element_stop (GstBaseTransform * bt); static GstStaticPadTemplate gst_gl_upload_element_src_pad_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-raw(ANY)")); static void gst_gl_upload_element_class_init (GstGLUploadElementClass * klass) { GstBaseTransformClass *bt_class = GST_BASE_TRANSFORM_CLASS (klass); GstElementClass *element_class = GST_ELEMENT_CLASS (klass); GstCaps *upload_caps; bt_class->query = gst_gl_upload_element_query; bt_class->transform_caps = _gst_gl_upload_element_transform_caps; bt_class->set_caps = _gst_gl_upload_element_set_caps; bt_class->propose_allocation = _gst_gl_upload_element_propose_allocation; bt_class->decide_allocation = _gst_gl_upload_element_decide_allocation; bt_class->get_unit_size = gst_gl_upload_element_get_unit_size; bt_class->prepare_output_buffer = gst_gl_upload_element_prepare_output_buffer; bt_class->transform = gst_gl_upload_element_transform; bt_class->stop = gst_gl_upload_element_stop; bt_class->passthrough_on_same_caps = TRUE; gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_gl_upload_element_src_pad_template)); upload_caps = gst_gl_upload_get_input_template_caps (); gst_element_class_add_pad_template (element_class, gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, upload_caps)); gst_caps_unref (upload_caps); gst_element_class_set_metadata (element_class, "OpenGL uploader", "Filter/Video", "Uploads data into OpenGL", "Matthew Waters "); } static void gst_gl_upload_element_init (GstGLUploadElement * upload) { gst_base_transform_set_prefer_passthrough (GST_BASE_TRANSFORM (upload), TRUE); } static gboolean gst_gl_upload_element_stop (GstBaseTransform * bt) { GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt); if (upload->upload) { gst_object_unref (upload->upload); upload->upload = NULL; } gst_caps_replace (&upload->in_caps, NULL); gst_caps_replace (&upload->out_caps, NULL); return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (bt); } static gboolean gst_gl_upload_element_get_unit_size (GstBaseTransform * trans, GstCaps * caps, gsize * size) { gboolean ret = FALSE; GstVideoInfo info; ret = gst_video_info_from_caps (&info, caps); if (ret) *size = GST_VIDEO_INFO_SIZE (&info); return TRUE; } static GstCaps * _gst_gl_upload_element_transform_caps (GstBaseTransform * bt, GstPadDirection direction, GstCaps * caps, GstCaps * filter) { GstGLContext *context = GST_GL_BASE_FILTER (bt)->context; return gst_gl_upload_transform_caps (context, direction, caps, filter); } static gboolean _gst_gl_upload_element_propose_allocation (GstBaseTransform * bt, GstQuery * decide_query, GstQuery * query) { guint alloc_index; gboolean alloc_has_overlay_meta; GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt); if (!upload->upload) return FALSE; alloc_has_overlay_meta = gst_query_find_allocation_meta (decide_query, GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE, &alloc_index); if (alloc_has_overlay_meta) { const GstStructure *params; GST_DEBUG ("adding allocation meta in upload for textoverlay"); /* read window size from decide_query */ gst_query_parse_nth_allocation_meta (decide_query, alloc_index, ¶ms); /* it does not matter if params are NULL (no known window size), forward * the meta in any case */ gst_query_add_allocation_meta (query, GST_VIDEO_OVERLAY_COMPOSITION_META_API_TYPE, params); } gst_gl_upload_propose_allocation (upload->upload, decide_query, query); return TRUE; } static gboolean _gst_gl_upload_element_decide_allocation (GstBaseTransform * trans, GstQuery * query) { GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (trans); GstGLContext *context; gboolean ret; ret = GST_BASE_TRANSFORM_CLASS (gst_gl_upload_element_parent_class)->decide_allocation (trans, query); if (!ret) return FALSE; context = GST_GL_BASE_FILTER (trans)->context; if (!upload->upload) upload->upload = gst_gl_upload_new (context); return gst_gl_upload_set_caps (upload->upload, upload->in_caps, upload->out_caps); } static gboolean _gst_gl_upload_element_set_caps (GstBaseTransform * bt, GstCaps * in_caps, GstCaps * out_caps) { GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt); gst_caps_replace (&upload->in_caps, in_caps); gst_caps_replace (&upload->out_caps, out_caps); if (upload->upload) { gst_gl_upload_release_buffer (upload->upload); return gst_gl_upload_set_caps (upload->upload, in_caps, out_caps); } return TRUE; } static gboolean gst_gl_upload_element_query (GstBaseTransform * bt, GstPadDirection direction, GstQuery * query) { GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt); switch (GST_QUERY_TYPE (query)) { case GST_QUERY_DRAIN: if (upload->upload) gst_gl_upload_release_buffer (upload->upload); break; default: break; } return GST_BASE_TRANSFORM_CLASS (parent_class)->query (bt, direction, query); } GstFlowReturn gst_gl_upload_element_prepare_output_buffer (GstBaseTransform * bt, GstBuffer * buffer, GstBuffer ** outbuf) { GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt); GstGLUploadReturn ret; if (gst_base_transform_is_passthrough (bt)) { *outbuf = buffer; return GST_FLOW_OK; } if (!upload->upload) return GST_FLOW_NOT_NEGOTIATED; ret = gst_gl_upload_perform_with_buffer (upload->upload, buffer, outbuf); /* basetransform doesn't unref if they're the same */ if (buffer == *outbuf) gst_buffer_unref (*outbuf); return ret == GST_GL_UPLOAD_DONE ? GST_FLOW_OK : GST_FLOW_ERROR; } static GstFlowReturn gst_gl_upload_element_transform (GstBaseTransform * bt, GstBuffer * buffer, GstBuffer * outbuf) { return GST_FLOW_OK; }