3 * Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Library General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Library General Public License for more details.
15 * You should have received a copy of the GNU Library General Public
16 * License along with this library; if not, write to the
17 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
18 * Boston, MA 02110-1301, USA.
27 #include <gst/gl/gl.h>
28 #include "gstgluploadelement.h"
30 GST_DEBUG_CATEGORY_STATIC (gst_gl_upload_element_debug);
31 #define GST_CAT_DEFAULT gst_gl_upload_element_debug
33 #define gst_gl_upload_element_parent_class parent_class
34 G_DEFINE_TYPE_WITH_CODE (GstGLUploadElement, gst_gl_upload_element,
35 GST_TYPE_GL_BASE_FILTER,
36 GST_DEBUG_CATEGORY_INIT (gst_gl_upload_element_debug, "gluploadelement", 0,
37 "glupload Element"););
39 static gboolean gst_gl_upload_element_get_unit_size (GstBaseTransform * trans,
40 GstCaps * caps, gsize * size);
41 static GstCaps *_gst_gl_upload_element_transform_caps (GstBaseTransform * bt,
42 GstPadDirection direction, GstCaps * caps, GstCaps * filter);
43 static gboolean _gst_gl_upload_element_set_caps (GstBaseTransform * bt,
44 GstCaps * in_caps, GstCaps * out_caps);
45 static gboolean gst_gl_upload_element_filter_meta (GstBaseTransform * trans,
46 GstQuery * query, GType api, const GstStructure * params);
47 static gboolean _gst_gl_upload_element_propose_allocation (GstBaseTransform *
48 bt, GstQuery * decide_query, GstQuery * query);
49 static gboolean _gst_gl_upload_element_decide_allocation (GstBaseTransform *
50 trans, GstQuery * query);
52 gst_gl_upload_element_prepare_output_buffer (GstBaseTransform * bt,
53 GstBuffer * buffer, GstBuffer ** outbuf);
54 static GstFlowReturn gst_gl_upload_element_transform (GstBaseTransform * bt,
55 GstBuffer * buffer, GstBuffer * outbuf);
56 static gboolean gst_gl_upload_element_stop (GstBaseTransform * bt);
57 static GstStateChangeReturn
58 gst_gl_upload_element_change_state (GstElement * element,
59 GstStateChange transition);
62 static GstStaticPadTemplate gst_gl_upload_element_src_pad_template =
63 GST_STATIC_PAD_TEMPLATE ("src",
66 GST_STATIC_CAPS ("video/x-raw(ANY)"));
69 _gst_gl_upload_element_clear_upload (GstGLUploadElement * upload)
71 GstGLUpload *ul = NULL;
73 GST_OBJECT_LOCK (upload);
75 upload->upload = NULL;
76 GST_OBJECT_UNLOCK (upload);
79 gst_object_unref (ul);
83 gst_gl_upload_element_finalize (GObject * object)
85 GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (object);
87 _gst_gl_upload_element_clear_upload (upload);
89 G_OBJECT_CLASS (parent_class)->finalize (object);
93 gst_gl_upload_element_class_init (GstGLUploadElementClass * klass)
95 GstBaseTransformClass *bt_class = GST_BASE_TRANSFORM_CLASS (klass);
96 GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
97 GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
100 bt_class->transform_caps = _gst_gl_upload_element_transform_caps;
101 bt_class->set_caps = _gst_gl_upload_element_set_caps;
102 bt_class->filter_meta = gst_gl_upload_element_filter_meta;
103 bt_class->propose_allocation = _gst_gl_upload_element_propose_allocation;
104 bt_class->decide_allocation = _gst_gl_upload_element_decide_allocation;
105 bt_class->get_unit_size = gst_gl_upload_element_get_unit_size;
106 bt_class->prepare_output_buffer = gst_gl_upload_element_prepare_output_buffer;
107 bt_class->transform = gst_gl_upload_element_transform;
108 bt_class->stop = gst_gl_upload_element_stop;
110 element_class->change_state = gst_gl_upload_element_change_state;
112 gst_element_class_add_static_pad_template (element_class,
113 &gst_gl_upload_element_src_pad_template);
115 upload_caps = gst_gl_upload_get_input_template_caps ();
116 gst_element_class_add_pad_template (element_class,
117 gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, upload_caps));
118 gst_caps_unref (upload_caps);
120 gst_element_class_set_metadata (element_class,
121 "OpenGL uploader", "Filter/Video",
122 "Uploads data into OpenGL", "Matthew Waters <matthew@centricular.com>");
124 gobject_class->finalize = gst_gl_upload_element_finalize;
128 gst_gl_upload_element_init (GstGLUploadElement * upload)
130 gst_base_transform_set_prefer_passthrough (GST_BASE_TRANSFORM (upload), TRUE);
134 gst_gl_upload_element_stop (GstBaseTransform * bt)
136 GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
138 _gst_gl_upload_element_clear_upload (upload);
140 return GST_BASE_TRANSFORM_CLASS (parent_class)->stop (bt);
144 gst_gl_upload_element_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
147 gboolean ret = FALSE;
150 ret = gst_video_info_from_caps (&info, caps);
152 *size = GST_VIDEO_INFO_SIZE (&info);
158 _gst_gl_upload_element_transform_caps (GstBaseTransform * bt,
159 GstPadDirection direction, GstCaps * caps, GstCaps * filter)
161 GstGLBaseFilter *base_filter = GST_GL_BASE_FILTER (bt);
162 GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
163 GstGLContext *context;
164 GstGLUpload *ul = NULL;
167 if (base_filter->display && !gst_gl_base_filter_find_gl_context (base_filter))
170 context = gst_gl_base_filter_get_gl_context (base_filter);
172 GST_OBJECT_LOCK (upload);
173 if (upload->upload == NULL) {
174 GST_OBJECT_UNLOCK (upload);
176 ul = gst_gl_upload_new (context);
178 GST_OBJECT_LOCK (upload);
179 if (upload->upload) {
180 gst_object_unref (ul);
190 GST_OBJECT_UNLOCK (upload);
193 gst_gl_upload_transform_caps (ul, context, direction, caps, filter);
195 gst_object_unref (ul);
197 gst_object_unref (context);
203 gst_gl_upload_element_filter_meta (GstBaseTransform * trans, GstQuery * query,
204 GType api, const GstStructure * params)
206 /* propose all metadata upstream */
211 _gst_gl_upload_element_propose_allocation (GstBaseTransform * bt,
212 GstQuery * decide_query, GstQuery * query)
214 GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
216 GstGLContext *context;
219 GST_OBJECT_LOCK (upload);
220 if (!upload->upload) {
221 GST_OBJECT_UNLOCK (upload);
224 ul = gst_object_ref (upload->upload);
225 GST_OBJECT_UNLOCK (upload);
227 context = gst_gl_base_filter_get_gl_context (GST_GL_BASE_FILTER (bt));
229 gst_object_unref (ul);
233 gst_gl_upload_set_context (ul, context);
235 ret = GST_BASE_TRANSFORM_CLASS (parent_class)->propose_allocation (bt,
236 decide_query, query);
237 gst_gl_upload_propose_allocation (ul, decide_query, query);
239 gst_object_unref (ul);
240 gst_object_unref (context);
246 _gst_gl_upload_element_decide_allocation (GstBaseTransform * trans,
249 GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (trans);
250 GstGLContext *context = GST_GL_BASE_FILTER (trans)->context;
252 if (upload->upload && context)
253 gst_gl_upload_set_context (upload->upload, context);
256 GST_BASE_TRANSFORM_CLASS
257 (gst_gl_upload_element_parent_class)->decide_allocation (trans, query);
261 _gst_gl_upload_element_set_caps (GstBaseTransform * bt, GstCaps * in_caps,
264 GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
266 return gst_gl_upload_set_caps (upload->upload, in_caps, out_caps);
270 gst_gl_upload_element_prepare_output_buffer (GstBaseTransform * bt,
271 GstBuffer * buffer, GstBuffer ** outbuf)
273 GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (bt);
274 GstGLUploadReturn ret;
275 GstBaseTransformClass *bclass;
277 bclass = GST_BASE_TRANSFORM_GET_CLASS (bt);
279 if (gst_base_transform_is_passthrough (bt)) {
285 return GST_FLOW_NOT_NEGOTIATED;
288 ret = gst_gl_upload_perform_with_buffer (upload->upload, buffer, outbuf);
289 if (ret == GST_GL_UPLOAD_RECONFIGURE) {
290 GstPad *sinkpad = GST_BASE_TRANSFORM_SINK_PAD (bt);
291 GstCaps *incaps = gst_pad_get_current_caps (sinkpad);
292 GST_DEBUG_OBJECT (bt,
293 "Failed to upload with curren caps -- reconfiguring.");
294 /* Note: gst_base_transform_reconfigure_src() cannot be used here.
295 * Reconfiguring must be synchronous to avoid dropping the current
297 gst_pad_send_event (sinkpad, gst_event_new_caps (incaps));
298 gst_caps_unref (incaps);
299 if (!gst_pad_needs_reconfigure (GST_BASE_TRANSFORM_SRC_PAD (bt))) {
300 GST_DEBUG_OBJECT (bt, "Retry uploading with new caps");
306 if (ret != GST_GL_UPLOAD_DONE || *outbuf == NULL) {
307 GST_ELEMENT_ERROR (bt, RESOURCE, NOT_FOUND, ("%s",
308 "Failed to upload buffer"), (NULL));
310 gst_buffer_unref (*outbuf);
311 return GST_FLOW_ERROR;
314 /* basetransform doesn't unref if they're the same */
315 if (buffer == *outbuf)
316 gst_buffer_unref (*outbuf);
318 bclass->copy_metadata (bt, buffer, *outbuf);
324 gst_gl_upload_element_transform (GstBaseTransform * bt, GstBuffer * buffer,
330 static GstStateChangeReturn
331 gst_gl_upload_element_change_state (GstElement * element,
332 GstStateChange transition)
334 GstGLUploadElement *upload = GST_GL_UPLOAD_ELEMENT (element);
335 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
337 GST_DEBUG_OBJECT (upload, "changing state: %s => %s",
338 gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
339 gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
341 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
342 if (ret == GST_STATE_CHANGE_FAILURE)
345 switch (transition) {
346 case GST_STATE_CHANGE_READY_TO_NULL:
347 _gst_gl_upload_element_clear_upload (upload);