1 /*
2 * GStreamer
3 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
4 * Copyright (C) 2002,2007 David A. Schleef <ds@schleef.org>
5 * Copyright (C) 2008 Julien Isorce <julien.isorce@gmail.com>
6 * Copyright (C) 2015 Matthew Waters <matthew@centricular.com>
7 *
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
12 *
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
17 *
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, USA.
22 */
23
24 /**
25 * SECTION:element-gltestsrc
26 * @title: gltestsrc
27 *
28 * The gltestsrc element is used to produce test video texture.
29 * The video test produced can be controlled with the "pattern"
30 * property.
31 *
32 * ## Example launch line
33 *
34 * |[
35 * gst-launch-1.0 -v gltestsrc pattern=smpte ! glimagesink
36 * ]|
37 * Shows original SMPTE color bars in a window.
38 *
39 */
40
41 #ifdef HAVE_CONFIG_H
42 #include "config.h"
43 #endif
44
45 #include <gst/gl/gstglfuncs.h>
46 #include <gst/gst-i18n-plugin.h>
47
48 #include "gstgltestsrc.h"
49 #include "gltestsrc.h"
50
51 #define USE_PEER_BUFFERALLOC
52 #define SUPPORTED_GL_APIS (GST_GL_API_OPENGL | GST_GL_API_OPENGL3 | GST_GL_API_GLES2)
53
54 GST_DEBUG_CATEGORY_STATIC (gl_test_src_debug);
55 #define GST_CAT_DEFAULT gl_test_src_debug
56
57 enum
58 {
59 PROP_0,
60 PROP_PATTERN,
61 PROP_TIMESTAMP_OFFSET,
62 PROP_IS_LIVE
63 /* FILL ME */
64 };
65
66 /* *INDENT-OFF* */
67 static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
68 GST_PAD_SRC,
69 GST_PAD_ALWAYS,
70 GST_STATIC_CAPS ("video/x-raw(" GST_CAPS_FEATURE_MEMORY_GL_MEMORY "), "
71 "format = (string) RGBA, "
72 "width = " GST_VIDEO_SIZE_RANGE ", "
73 "height = " GST_VIDEO_SIZE_RANGE ", "
74 "framerate = " GST_VIDEO_FPS_RANGE ","
75 "texture-target = (string) 2D")
76 );
77 /* *INDENT-ON* */
78
79 #define gst_gl_test_src_parent_class parent_class
80 G_DEFINE_TYPE (GstGLTestSrc, gst_gl_test_src, GST_TYPE_PUSH_SRC);
81
82 static void gst_gl_test_src_set_pattern (GstGLTestSrc * gltestsrc,
83 int pattern_type);
84 static void gst_gl_test_src_set_property (GObject * object, guint prop_id,
85 const GValue * value, GParamSpec * pspec);
86 static void gst_gl_test_src_get_property (GObject * object, guint prop_id,
87 GValue * value, GParamSpec * pspec);
88
89 static gboolean gst_gl_test_src_setcaps (GstBaseSrc * bsrc, GstCaps * caps);
90 static GstCaps *gst_gl_test_src_fixate (GstBaseSrc * bsrc, GstCaps * caps);
91
92 static gboolean gst_gl_test_src_is_seekable (GstBaseSrc * psrc);
93 static gboolean gst_gl_test_src_do_seek (GstBaseSrc * bsrc,
94 GstSegment * segment);
95 static gboolean gst_gl_test_src_query (GstBaseSrc * bsrc, GstQuery * query);
96 static void gst_gl_test_src_set_context (GstElement * element,
97 GstContext * context);
98 static GstStateChangeReturn gst_gl_test_src_change_state (GstElement * element,
99 GstStateChange transition);
100
101 static void gst_gl_test_src_get_times (GstBaseSrc * basesrc,
102 GstBuffer * buffer, GstClockTime * start, GstClockTime * end);
103 static GstFlowReturn gst_gl_test_src_fill (GstPushSrc * psrc,
104 GstBuffer * buffer);
105 static gboolean gst_gl_test_src_start (GstBaseSrc * basesrc);
106 static gboolean gst_gl_test_src_stop (GstBaseSrc * basesrc);
107 static gboolean gst_gl_test_src_decide_allocation (GstBaseSrc * basesrc,
108 GstQuery * query);
109
110 static gboolean gst_gl_test_src_callback (gpointer stuff);
111
112 static gboolean gst_gl_test_src_init_shader (GstGLTestSrc * gltestsrc);
113
114 #define GST_TYPE_GL_TEST_SRC_PATTERN (gst_gl_test_src_pattern_get_type ())
115 static GType
gst_gl_test_src_pattern_get_type(void)116 gst_gl_test_src_pattern_get_type (void)
117 {
118 static GType gl_test_src_pattern_type = 0;
119 static const GEnumValue pattern_types[] = {
120 {GST_GL_TEST_SRC_SMPTE, "SMPTE 100% color bars", "smpte"},
121 {GST_GL_TEST_SRC_SNOW, "Random (television snow)", "snow"},
122 {GST_GL_TEST_SRC_BLACK, "100% Black", "black"},
123 {GST_GL_TEST_SRC_WHITE, "100% White", "white"},
124 {GST_GL_TEST_SRC_RED, "Red", "red"},
125 {GST_GL_TEST_SRC_GREEN, "Green", "green"},
126 {GST_GL_TEST_SRC_BLUE, "Blue", "blue"},
127 {GST_GL_TEST_SRC_CHECKERS1, "Checkers 1px", "checkers-1"},
128 {GST_GL_TEST_SRC_CHECKERS2, "Checkers 2px", "checkers-2"},
129 {GST_GL_TEST_SRC_CHECKERS4, "Checkers 4px", "checkers-4"},
130 {GST_GL_TEST_SRC_CHECKERS8, "Checkers 8px", "checkers-8"},
131 {GST_GL_TEST_SRC_CIRCULAR, "Circular", "circular"},
132 {GST_GL_TEST_SRC_BLINK, "Blink", "blink"},
133 {GST_GL_TEST_SRC_MANDELBROT, "Mandelbrot Fractal", "mandelbrot"},
134 {0, NULL, NULL}
135 };
136
137 if (!gl_test_src_pattern_type) {
138 gl_test_src_pattern_type =
139 g_enum_register_static ("GstGLTestSrcPattern", pattern_types);
140 }
141 return gl_test_src_pattern_type;
142 }
143
144 static void
gst_gl_test_src_class_init(GstGLTestSrcClass * klass)145 gst_gl_test_src_class_init (GstGLTestSrcClass * klass)
146 {
147 GObjectClass *gobject_class;
148 GstBaseSrcClass *gstbasesrc_class;
149 GstPushSrcClass *gstpushsrc_class;
150 GstElementClass *element_class;
151
152 GST_DEBUG_CATEGORY_INIT (gl_test_src_debug, "gltestsrc", 0,
153 "Video Test Source");
154
155 gobject_class = (GObjectClass *) klass;
156 gstbasesrc_class = (GstBaseSrcClass *) klass;
157 gstpushsrc_class = (GstPushSrcClass *) klass;
158 element_class = GST_ELEMENT_CLASS (klass);
159
160 gobject_class->set_property = gst_gl_test_src_set_property;
161 gobject_class->get_property = gst_gl_test_src_get_property;
162
163 g_object_class_install_property (gobject_class, PROP_PATTERN,
164 g_param_spec_enum ("pattern", "Pattern",
165 "Type of test pattern to generate", GST_TYPE_GL_TEST_SRC_PATTERN,
166 GST_GL_TEST_SRC_SMPTE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
167 g_object_class_install_property (gobject_class,
168 PROP_TIMESTAMP_OFFSET, g_param_spec_int64 ("timestamp-offset",
169 "Timestamp offset",
170 "An offset added to timestamps set on buffers (in ns)", G_MININT64,
171 G_MAXINT64, 0, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
172 g_object_class_install_property (gobject_class, PROP_IS_LIVE,
173 g_param_spec_boolean ("is-live", "Is Live",
174 "Whether to act as a live source", FALSE,
175 G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
176
177 gst_element_class_set_metadata (element_class, "Video test source",
178 "Source/Video", "Creates a test video stream",
179 "David A. Schleef <ds@schleef.org>");
180
181 gst_element_class_add_static_pad_template (element_class, &src_factory);
182
183 element_class->set_context = gst_gl_test_src_set_context;
184 element_class->change_state = gst_gl_test_src_change_state;
185
186 gstbasesrc_class->set_caps = gst_gl_test_src_setcaps;
187 gstbasesrc_class->is_seekable = gst_gl_test_src_is_seekable;
188 gstbasesrc_class->do_seek = gst_gl_test_src_do_seek;
189 gstbasesrc_class->query = gst_gl_test_src_query;
190 gstbasesrc_class->get_times = gst_gl_test_src_get_times;
191 gstbasesrc_class->start = gst_gl_test_src_start;
192 gstbasesrc_class->stop = gst_gl_test_src_stop;
193 gstbasesrc_class->fixate = gst_gl_test_src_fixate;
194 gstbasesrc_class->decide_allocation = gst_gl_test_src_decide_allocation;
195
196 gstpushsrc_class->fill = gst_gl_test_src_fill;
197 }
198
199 static void
gst_gl_test_src_init(GstGLTestSrc * src)200 gst_gl_test_src_init (GstGLTestSrc * src)
201 {
202 gst_gl_test_src_set_pattern (src, GST_GL_TEST_SRC_SMPTE);
203
204 src->timestamp_offset = 0;
205
206 /* we operate in time */
207 gst_base_src_set_format (GST_BASE_SRC (src), GST_FORMAT_TIME);
208 gst_base_src_set_live (GST_BASE_SRC (src), FALSE);
209 }
210
211 static GstCaps *
gst_gl_test_src_fixate(GstBaseSrc * bsrc,GstCaps * caps)212 gst_gl_test_src_fixate (GstBaseSrc * bsrc, GstCaps * caps)
213 {
214 GstStructure *structure;
215
216 GST_DEBUG ("fixate");
217
218 caps = gst_caps_make_writable (caps);
219
220 structure = gst_caps_get_structure (caps, 0);
221
222 gst_structure_fixate_field_nearest_int (structure, "width", 320);
223 gst_structure_fixate_field_nearest_int (structure, "height", 240);
224 gst_structure_fixate_field_nearest_fraction (structure, "framerate", 30, 1);
225
226 caps = GST_BASE_SRC_CLASS (parent_class)->fixate (bsrc, caps);
227
228 return caps;
229 }
230
231 static void
gst_gl_test_src_set_pattern(GstGLTestSrc * gltestsrc,gint pattern_type)232 gst_gl_test_src_set_pattern (GstGLTestSrc * gltestsrc, gint pattern_type)
233 {
234 gltestsrc->set_pattern = pattern_type;
235 }
236
237 static void
gst_gl_test_src_set_property(GObject * object,guint prop_id,const GValue * value,GParamSpec * pspec)238 gst_gl_test_src_set_property (GObject * object, guint prop_id,
239 const GValue * value, GParamSpec * pspec)
240 {
241 GstGLTestSrc *src = GST_GL_TEST_SRC (object);
242
243 switch (prop_id) {
244 case PROP_PATTERN:
245 gst_gl_test_src_set_pattern (src, g_value_get_enum (value));
246 break;
247 case PROP_TIMESTAMP_OFFSET:
248 src->timestamp_offset = g_value_get_int64 (value);
249 break;
250 case PROP_IS_LIVE:
251 gst_base_src_set_live (GST_BASE_SRC (src), g_value_get_boolean (value));
252 break;
253 default:
254 break;
255 }
256 }
257
258 static void
gst_gl_test_src_get_property(GObject * object,guint prop_id,GValue * value,GParamSpec * pspec)259 gst_gl_test_src_get_property (GObject * object, guint prop_id,
260 GValue * value, GParamSpec * pspec)
261 {
262 GstGLTestSrc *src = GST_GL_TEST_SRC (object);
263
264 switch (prop_id) {
265 case PROP_PATTERN:
266 g_value_set_enum (value, src->set_pattern);
267 break;
268 case PROP_TIMESTAMP_OFFSET:
269 g_value_set_int64 (value, src->timestamp_offset);
270 break;
271 case PROP_IS_LIVE:
272 g_value_set_boolean (value, gst_base_src_is_live (GST_BASE_SRC (src)));
273 break;
274 default:
275 G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
276 break;
277 }
278 }
279
280 static gboolean
gst_gl_test_src_setcaps(GstBaseSrc * bsrc,GstCaps * caps)281 gst_gl_test_src_setcaps (GstBaseSrc * bsrc, GstCaps * caps)
282 {
283 GstGLTestSrc *gltestsrc = GST_GL_TEST_SRC (bsrc);
284
285 GST_DEBUG ("setcaps");
286
287 if (!gst_video_info_from_caps (&gltestsrc->out_info, caps))
288 goto wrong_caps;
289
290 gltestsrc->negotiated = TRUE;
291
292 gst_caps_replace (&gltestsrc->out_caps, caps);
293
294 return TRUE;
295
296 /* ERRORS */
297 wrong_caps:
298 {
299 GST_WARNING ("wrong caps");
300 return FALSE;
301 }
302 }
303
304 static void
gst_gl_test_src_set_context(GstElement * element,GstContext * context)305 gst_gl_test_src_set_context (GstElement * element, GstContext * context)
306 {
307 GstGLTestSrc *src = GST_GL_TEST_SRC (element);
308
309 gst_gl_handle_set_context (element, context, &src->display,
310 &src->other_context);
311
312 if (src->display)
313 gst_gl_display_filter_gl_api (src->display, SUPPORTED_GL_APIS);
314
315 GST_ELEMENT_CLASS (parent_class)->set_context (element, context);
316 }
317
318 static gboolean
gst_gl_test_src_query(GstBaseSrc * bsrc,GstQuery * query)319 gst_gl_test_src_query (GstBaseSrc * bsrc, GstQuery * query)
320 {
321 gboolean res = FALSE;
322 GstGLTestSrc *src;
323
324 src = GST_GL_TEST_SRC (bsrc);
325
326 switch (GST_QUERY_TYPE (query)) {
327 case GST_QUERY_CONTEXT:
328 {
329 if (gst_gl_handle_context_query ((GstElement *) src, query,
330 src->display, src->context, src->other_context))
331 return TRUE;
332 break;
333 }
334 case GST_QUERY_CONVERT:
335 {
336 GstFormat src_fmt, dest_fmt;
337 gint64 src_val, dest_val;
338
339 gst_query_parse_convert (query, &src_fmt, &src_val, &dest_fmt, &dest_val);
340 res =
341 gst_video_info_convert (&src->out_info, src_fmt, src_val, dest_fmt,
342 &dest_val);
343 gst_query_set_convert (query, src_fmt, src_val, dest_fmt, dest_val);
344
345 return res;
346 }
347 default:
348 break;
349 }
350
351 return GST_BASE_SRC_CLASS (parent_class)->query (bsrc, query);
352 }
353
354 static void
gst_gl_test_src_get_times(GstBaseSrc * basesrc,GstBuffer * buffer,GstClockTime * start,GstClockTime * end)355 gst_gl_test_src_get_times (GstBaseSrc * basesrc, GstBuffer * buffer,
356 GstClockTime * start, GstClockTime * end)
357 {
358 /* for live sources, sync on the timestamp of the buffer */
359 if (gst_base_src_is_live (basesrc)) {
360 GstClockTime timestamp = GST_BUFFER_TIMESTAMP (buffer);
361
362 if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
363 /* get duration to calculate end time */
364 GstClockTime duration = GST_BUFFER_DURATION (buffer);
365
366 if (GST_CLOCK_TIME_IS_VALID (duration))
367 *end = timestamp + duration;
368 *start = timestamp;
369 }
370 } else {
371 *start = -1;
372 *end = -1;
373 }
374 }
375
376 static gboolean
gst_gl_test_src_do_seek(GstBaseSrc * bsrc,GstSegment * segment)377 gst_gl_test_src_do_seek (GstBaseSrc * bsrc, GstSegment * segment)
378 {
379 GstClockTime time;
380 GstGLTestSrc *src;
381
382 src = GST_GL_TEST_SRC (bsrc);
383
384 segment->time = segment->start;
385 time = segment->position;
386
387 /* now move to the time indicated */
388 if (src->out_info.fps_n) {
389 src->n_frames = gst_util_uint64_scale (time,
390 src->out_info.fps_n, src->out_info.fps_d * GST_SECOND);
391 } else
392 src->n_frames = 0;
393
394 if (src->out_info.fps_n) {
395 src->running_time = gst_util_uint64_scale (src->n_frames,
396 src->out_info.fps_d * GST_SECOND, src->out_info.fps_n);
397 } else {
398 /* FIXME : Not sure what to set here */
399 src->running_time = 0;
400 }
401
402 g_return_val_if_fail (src->running_time <= time, FALSE);
403
404 return TRUE;
405 }
406
407 static gboolean
gst_gl_test_src_is_seekable(GstBaseSrc * psrc)408 gst_gl_test_src_is_seekable (GstBaseSrc * psrc)
409 {
410 /* we're seekable... */
411 return TRUE;
412 }
413
414 static gboolean
gst_gl_test_src_init_shader(GstGLTestSrc * gltestsrc)415 gst_gl_test_src_init_shader (GstGLTestSrc * gltestsrc)
416 {
417 if (gst_gl_context_get_gl_api (gltestsrc->context)) {
418 /* blocking call, wait until the opengl thread has compiled the shader */
419 // if (gltestsrc->vertex_src == NULL)
420 // return FALSE;
421 // return gst_gl_context_gen_shader (gltestsrc->context, gltestsrc->vertex_src,
422 // gltestsrc->fragment_src, &gltestsrc->shader);
423 }
424 return TRUE;
425 }
426
427 static void
_fill_gl(GstGLContext * context,GstGLTestSrc * src)428 _fill_gl (GstGLContext * context, GstGLTestSrc * src)
429 {
430 src->gl_result = gst_gl_framebuffer_draw_to_texture (src->fbo, src->out_tex,
431 gst_gl_test_src_callback, src);
432 }
433
434 static GstFlowReturn
gst_gl_test_src_fill(GstPushSrc * psrc,GstBuffer * buffer)435 gst_gl_test_src_fill (GstPushSrc * psrc, GstBuffer * buffer)
436 {
437 GstGLTestSrc *src = GST_GL_TEST_SRC (psrc);
438 GstClockTime next_time;
439 GstVideoFrame out_frame;
440 GstGLSyncMeta *sync_meta;
441
442 if (G_UNLIKELY (!src->negotiated || !src->context))
443 goto not_negotiated;
444
445 /* 0 framerate and we are at the second frame, eos */
446 if (G_UNLIKELY (GST_VIDEO_INFO_FPS_N (&src->out_info) == 0
447 && src->n_frames == 1))
448 goto eos;
449
450 if (!gst_video_frame_map (&out_frame, &src->out_info, buffer,
451 GST_MAP_WRITE | GST_MAP_GL)) {
452 return GST_FLOW_NOT_NEGOTIATED;
453 }
454
455 src->out_tex = (GstGLMemory *) out_frame.map[0].memory;
456
457 gst_gl_context_thread_add (src->context, (GstGLContextThreadFunc) _fill_gl,
458 src);
459 if (!src->gl_result) {
460 gst_video_frame_unmap (&out_frame);
461 goto gl_error;
462 }
463 gst_video_frame_unmap (&out_frame);
464 if (!src->gl_result)
465 goto gl_error;
466
467 sync_meta = gst_buffer_get_gl_sync_meta (buffer);
468 if (sync_meta)
469 gst_gl_sync_meta_set_sync_point (sync_meta, src->context);
470
471 GST_BUFFER_TIMESTAMP (buffer) = src->timestamp_offset + src->running_time;
472 GST_BUFFER_OFFSET (buffer) = src->n_frames;
473 src->n_frames++;
474 GST_BUFFER_OFFSET_END (buffer) = src->n_frames;
475 if (src->out_info.fps_n) {
476 next_time = gst_util_uint64_scale_int (src->n_frames * GST_SECOND,
477 src->out_info.fps_d, src->out_info.fps_n);
478 GST_BUFFER_DURATION (buffer) = next_time - src->running_time;
479 } else {
480 next_time = src->timestamp_offset;
481 /* NONE means forever */
482 GST_BUFFER_DURATION (buffer) = GST_CLOCK_TIME_NONE;
483 }
484
485 src->running_time = next_time;
486
487 return GST_FLOW_OK;
488
489 gl_error:
490 {
491 GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (_("failed to draw pattern")),
492 (_("A GL error occurred")));
493 return GST_FLOW_NOT_NEGOTIATED;
494 }
495 not_negotiated:
496 {
497 GST_ELEMENT_ERROR (src, CORE, NEGOTIATION, (NULL),
498 (_("format wasn't negotiated before get function")));
499 return GST_FLOW_NOT_NEGOTIATED;
500 }
501 eos:
502 {
503 GST_DEBUG_OBJECT (src, "eos: 0 framerate, frame %d", (gint) src->n_frames);
504 return GST_FLOW_EOS;
505 }
506 }
507
508 static gboolean
gst_gl_test_src_start(GstBaseSrc * basesrc)509 gst_gl_test_src_start (GstBaseSrc * basesrc)
510 {
511 GstGLTestSrc *src = GST_GL_TEST_SRC (basesrc);
512
513 src->running_time = 0;
514 src->n_frames = 0;
515 src->negotiated = FALSE;
516
517 return TRUE;
518 }
519
520 static void
gst_gl_test_src_gl_stop(GstGLContext * context,GstGLTestSrc * src)521 gst_gl_test_src_gl_stop (GstGLContext * context, GstGLTestSrc * src)
522 {
523 if (src->fbo)
524 gst_object_unref (src->fbo);
525 src->fbo = NULL;
526
527 if (src->shader)
528 gst_object_unref (src->shader);
529 src->shader = NULL;
530
531
532 if (src->src_impl)
533 src->src_funcs->free (src->src_impl);
534 src->src_impl = NULL;
535 }
536
537 static gboolean
gst_gl_test_src_stop(GstBaseSrc * basesrc)538 gst_gl_test_src_stop (GstBaseSrc * basesrc)
539 {
540 GstGLTestSrc *src = GST_GL_TEST_SRC (basesrc);
541
542 if (src->context)
543 gst_gl_context_thread_add (src->context,
544 (GstGLContextThreadFunc) gst_gl_test_src_gl_stop, src);
545
546 gst_caps_replace (&src->out_caps, NULL);
547
548 if (src->context)
549 gst_object_unref (src->context);
550 src->context = NULL;
551
552 return TRUE;
553 }
554
555 static gboolean
_find_local_gl_context(GstGLTestSrc * src)556 _find_local_gl_context (GstGLTestSrc * src)
557 {
558 if (gst_gl_query_local_gl_context (GST_ELEMENT (src), GST_PAD_SRC,
559 &src->context))
560 return TRUE;
561 return FALSE;
562 }
563
564 static void
_src_generate_fbo_gl(GstGLContext * context,GstGLTestSrc * src)565 _src_generate_fbo_gl (GstGLContext * context, GstGLTestSrc * src)
566 {
567 src->fbo = gst_gl_framebuffer_new_with_default_depth (src->context,
568 GST_VIDEO_INFO_WIDTH (&src->out_info),
569 GST_VIDEO_INFO_HEIGHT (&src->out_info));
570 }
571
572 static gboolean
gst_gl_test_src_decide_allocation(GstBaseSrc * basesrc,GstQuery * query)573 gst_gl_test_src_decide_allocation (GstBaseSrc * basesrc, GstQuery * query)
574 {
575 GstGLTestSrc *src = GST_GL_TEST_SRC (basesrc);
576 GstBufferPool *pool = NULL;
577 GstStructure *config;
578 GstCaps *caps;
579 guint min, max, size;
580 gboolean update_pool;
581 GError *error = NULL;
582
583 if (!gst_gl_ensure_element_data (src, &src->display, &src->other_context))
584 return FALSE;
585
586 gst_gl_display_filter_gl_api (src->display, SUPPORTED_GL_APIS);
587
588 _find_local_gl_context (src);
589
590 if (!src->context) {
591 GST_OBJECT_LOCK (src->display);
592 do {
593 if (src->context) {
594 gst_object_unref (src->context);
595 src->context = NULL;
596 }
597 /* just get a GL context. we don't care */
598 src->context =
599 gst_gl_display_get_gl_context_for_thread (src->display, NULL);
600 if (!src->context) {
601 if (!gst_gl_display_create_context (src->display, src->other_context,
602 &src->context, &error)) {
603 GST_OBJECT_UNLOCK (src->display);
604 goto context_error;
605 }
606 }
607 } while (!gst_gl_display_add_context (src->display, src->context));
608 GST_OBJECT_UNLOCK (src->display);
609 }
610
611 if ((gst_gl_context_get_gl_api (src->context) & SUPPORTED_GL_APIS) == 0)
612 goto unsupported_gl_api;
613
614 gst_gl_context_thread_add (src->context,
615 (GstGLContextThreadFunc) _src_generate_fbo_gl, src);
616 if (!src->fbo)
617 goto context_error;
618
619 gst_query_parse_allocation (query, &caps, NULL);
620
621 if (gst_query_get_n_allocation_pools (query) > 0) {
622 gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
623
624 update_pool = TRUE;
625 } else {
626 GstVideoInfo vinfo;
627
628 gst_video_info_init (&vinfo);
629 gst_video_info_from_caps (&vinfo, caps);
630 size = vinfo.size;
631 min = max = 0;
632 update_pool = FALSE;
633 }
634
635 if (!pool || !GST_IS_GL_BUFFER_POOL (pool)) {
636 /* can't use this pool */
637 if (pool)
638 gst_object_unref (pool);
639 pool = gst_gl_buffer_pool_new (src->context);
640 }
641 config = gst_buffer_pool_get_config (pool);
642
643 gst_buffer_pool_config_set_params (config, caps, size, min, max);
644 gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META);
645 if (gst_query_find_allocation_meta (query, GST_GL_SYNC_META_API_TYPE, NULL))
646 gst_buffer_pool_config_add_option (config,
647 GST_BUFFER_POOL_OPTION_GL_SYNC_META);
648 gst_buffer_pool_config_add_option (config,
649 GST_BUFFER_POOL_OPTION_VIDEO_GL_TEXTURE_UPLOAD_META);
650
651 gst_buffer_pool_set_config (pool, config);
652
653 if (update_pool)
654 gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
655 else
656 gst_query_add_allocation_pool (query, pool, size, min, max);
657
658 gst_gl_test_src_init_shader (src);
659
660 gst_object_unref (pool);
661
662 return TRUE;
663
664 unsupported_gl_api:
665 {
666 GstGLAPI gl_api = gst_gl_context_get_gl_api (src->context);
667 gchar *gl_api_str = gst_gl_api_to_string (gl_api);
668 gchar *supported_gl_api_str = gst_gl_api_to_string (SUPPORTED_GL_APIS);
669 GST_ELEMENT_ERROR (src, RESOURCE, BUSY,
670 ("GL API's not compatible context: %s supported: %s", gl_api_str,
671 supported_gl_api_str), (NULL));
672
673 g_free (supported_gl_api_str);
674 g_free (gl_api_str);
675 return FALSE;
676 }
677 context_error:
678 {
679 if (error) {
680 GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, ("%s", error->message),
681 (NULL));
682 g_clear_error (&error);
683 } else {
684 GST_ELEMENT_ERROR (src, RESOURCE, NOT_FOUND, (NULL), (NULL));
685 }
686 if (src->context)
687 gst_object_unref (src->context);
688 src->context = NULL;
689 return FALSE;
690 }
691 }
692
693 static gboolean
gst_gl_test_src_callback(gpointer stuff)694 gst_gl_test_src_callback (gpointer stuff)
695 {
696 GstGLTestSrc *src = GST_GL_TEST_SRC (stuff);
697 const struct SrcFuncs *funcs;
698
699 funcs = src->src_funcs;
700
701 if (!funcs || src->set_pattern != src->active_pattern) {
702 if (src->src_impl && funcs)
703 funcs->free (src->src_impl);
704 src->src_funcs = funcs =
705 gst_gl_test_src_get_src_funcs_for_pattern (src->set_pattern);
706 if (funcs == NULL) {
707 GST_ERROR_OBJECT (src, "Could not find an implementation of the "
708 "requested pattern");
709 return FALSE;
710 }
711 src->src_impl = funcs->new (src);
712 if (!(src->gl_result =
713 funcs->init (src->src_impl, src->context, &src->out_info))) {
714 GST_ERROR_OBJECT (src, "Failed to initialize pattern");
715 return FALSE;
716 }
717 src->active_pattern = src->set_pattern;
718 }
719
720 return funcs->fill_bound_fbo (src->src_impl);
721 }
722
723 static GstStateChangeReturn
gst_gl_test_src_change_state(GstElement * element,GstStateChange transition)724 gst_gl_test_src_change_state (GstElement * element, GstStateChange transition)
725 {
726 GstGLTestSrc *src = GST_GL_TEST_SRC (element);
727 GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
728
729 GST_DEBUG_OBJECT (src, "changing state: %s => %s",
730 gst_element_state_get_name (GST_STATE_TRANSITION_CURRENT (transition)),
731 gst_element_state_get_name (GST_STATE_TRANSITION_NEXT (transition)));
732
733 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
734 if (ret == GST_STATE_CHANGE_FAILURE)
735 return ret;
736
737 switch (transition) {
738 case GST_STATE_CHANGE_READY_TO_NULL:
739 if (src->other_context) {
740 gst_object_unref (src->other_context);
741 src->other_context = NULL;
742 }
743
744 if (src->display) {
745 gst_object_unref (src->display);
746 src->display = NULL;
747 }
748 break;
749 default:
750 break;
751 }
752
753 return ret;
754 }
755