2 * Copyright (C) <2011> Sebastian Dröge <sebastian.droege@collabora.co.uk>
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
24 #include "gstplaysinkvideoconvert.h"
26 #include <gst/pbutils/pbutils.h>
27 #include <gst/gst-i18n-plugin.h>
29 GST_DEBUG_CATEGORY_STATIC (gst_play_sink_video_convert_debug);
30 #define GST_CAT_DEFAULT gst_play_sink_video_convert_debug
32 #define parent_class gst_play_sink_video_convert_parent_class
34 G_DEFINE_TYPE (GstPlaySinkVideoConvert, gst_play_sink_video_convert,
37 static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
42 static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
48 is_raw_caps (GstCaps * caps)
54 n = gst_caps_get_size (caps);
55 for (i = 0; i < n; i++) {
56 s = gst_caps_get_structure (caps, i);
57 name = gst_structure_get_name (s);
58 if (!g_str_has_prefix (name, "video/x-raw"))
66 post_missing_element_message (GstPlaySinkVideoConvert * self,
71 msg = gst_missing_element_message_new (GST_ELEMENT_CAST (self), name);
72 gst_element_post_message (GST_ELEMENT_CAST (self), msg);
76 pad_blocked_cb (GstPad * pad, GstProbeType type, gpointer type_data,
79 GstPlaySinkVideoConvert *self = user_data;
84 GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
85 GST_DEBUG_OBJECT (self, "Pad blocked");
87 /* There must be a peer at this point */
88 peer = gst_pad_get_peer (self->sinkpad);
89 caps = gst_pad_get_negotiated_caps (peer);
91 caps = gst_pad_get_caps (peer, NULL);
92 gst_object_unref (peer);
94 raw = is_raw_caps (caps);
95 GST_DEBUG_OBJECT (self, "Caps %" GST_PTR_FORMAT " are raw: %d", caps, raw);
96 gst_caps_unref (caps);
103 GstBin *bin = GST_BIN_CAST (self);
104 GstElement *head = NULL, *prev = NULL;
107 GST_DEBUG_OBJECT (self, "Creating raw conversion pipeline");
109 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), NULL);
110 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
112 self->conv = gst_element_factory_make ("videoconvert", "conv");
113 if (self->conv == NULL) {
114 post_missing_element_message (self, "videoconvert");
115 GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN,
116 (_("Missing element '%s' - check your GStreamer installation."),
117 "videoconvert"), ("video rendering might fail"));
119 gst_bin_add (bin, self->conv);
120 gst_element_sync_state_with_parent (self->conv);
121 prev = head = self->conv;
124 self->scale = gst_element_factory_make ("videoscale", "scale");
125 if (self->scale == NULL) {
126 post_missing_element_message (self, "videoscale");
127 GST_ELEMENT_WARNING (self, CORE, MISSING_PLUGIN,
128 (_("Missing element '%s' - check your GStreamer installation."),
129 "videoscale"), ("possibly a liboil version mismatch?"));
131 /* Add black borders if necessary to keep the DAR */
132 g_object_set (self->scale, "add-borders", TRUE, NULL);
133 gst_bin_add (bin, self->scale);
134 gst_element_sync_state_with_parent (self->scale);
136 if (!gst_element_link_pads_full (prev, "src", self->scale, "sink",
137 GST_PAD_LINK_CHECK_TEMPLATE_CAPS))
146 pad = gst_element_get_static_pad (head, "sink");
147 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), pad);
148 gst_object_unref (pad);
152 pad = gst_element_get_static_pad (prev, "src");
153 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), pad);
154 gst_object_unref (pad);
157 if (!head && !prev) {
158 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
159 self->sink_proxypad);
162 GST_DEBUG_OBJECT (self, "Raw conversion pipeline created");
164 GstBin *bin = GST_BIN_CAST (self);
166 GST_DEBUG_OBJECT (self, "Removing raw conversion pipeline");
168 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), NULL);
169 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
172 gst_element_set_state (self->conv, GST_STATE_NULL);
173 gst_bin_remove (bin, self->conv);
177 gst_element_set_state (self->scale, GST_STATE_NULL);
178 gst_bin_remove (bin, self->scale);
182 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
183 self->sink_proxypad);
185 GST_DEBUG_OBJECT (self, "Raw conversion pipeline removed");
189 self->sink_proxypad_block_id = 0;
190 GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
192 return GST_PROBE_REMOVE;
196 GST_ELEMENT_ERROR (self, CORE, PAD,
197 (NULL), ("Failed to configure the video converter."));
198 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
199 self->sink_proxypad);
200 self->sink_proxypad_block_id = 0;
201 GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
203 return GST_PROBE_REMOVE;
208 block_proxypad (GstPlaySinkVideoConvert * self)
210 if (self->sink_proxypad_block_id == 0) {
211 self->sink_proxypad_block_id =
212 gst_pad_add_probe (self->sink_proxypad, GST_PROBE_TYPE_BLOCK,
213 pad_blocked_cb, gst_object_ref (self),
214 (GDestroyNotify) gst_object_unref);
219 unblock_proxypad (GstPlaySinkVideoConvert * self)
221 if (self->sink_proxypad_block_id != 0) {
222 gst_pad_remove_probe (self->sink_proxypad, self->sink_proxypad_block_id);
223 self->sink_proxypad_block_id = 0;
228 gst_play_sink_video_convert_sink_setcaps (GstPlaySinkVideoConvert * self,
233 gboolean reconfigure = FALSE;
235 GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
236 s = gst_caps_get_structure (caps, 0);
237 name = gst_structure_get_name (s);
239 if (g_str_has_prefix (name, "video/x-raw")) {
240 if (!self->raw && !gst_pad_is_blocked (self->sink_proxypad)) {
241 GST_DEBUG_OBJECT (self, "Changing caps from non-raw to raw");
243 block_proxypad (self);
246 if (self->raw && !gst_pad_is_blocked (self->sink_proxypad)) {
247 GST_DEBUG_OBJECT (self, "Changing caps from raw to non-raw");
249 block_proxypad (self);
253 /* Otherwise the setcaps below fails */
255 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->sinkpad), NULL);
256 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad), NULL);
258 GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
260 GST_DEBUG_OBJECT (self, "Setting sink caps %" GST_PTR_FORMAT, caps);
266 gst_play_sink_video_convert_sink_event (GstPad * pad, GstEvent * event)
268 GstPlaySinkVideoConvert *self =
269 GST_PLAY_SINK_VIDEO_CONVERT (gst_pad_get_parent (pad));
272 switch (GST_EVENT_TYPE (event)) {
277 gst_event_parse_caps (event, &caps);
278 ret = gst_play_sink_video_convert_sink_setcaps (self, caps);
285 ret = gst_proxy_pad_event_default (pad, gst_event_ref (event));
287 switch (GST_EVENT_TYPE (event)) {
288 case GST_EVENT_SEGMENT:
289 GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
290 GST_DEBUG_OBJECT (self, "Segment before %" GST_SEGMENT_FORMAT,
292 gst_event_copy_segment (event, &self->segment);
293 GST_DEBUG_OBJECT (self, "Segment after %" GST_SEGMENT_FORMAT,
295 GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
297 case GST_EVENT_FLUSH_STOP:
298 GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
299 GST_DEBUG_OBJECT (self, "Resetting segment");
300 gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
301 GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
307 gst_event_unref (event);
308 gst_object_unref (self);
314 gst_play_sink_video_convert_getcaps (GstPad * pad, GstCaps * filter)
316 GstPlaySinkVideoConvert *self =
317 GST_PLAY_SINK_VIDEO_CONVERT (gst_pad_get_parent (pad));
319 GstPad *otherpad, *peer;
321 GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
322 if (pad == self->srcpad)
323 otherpad = gst_object_ref (self->sinkpad);
325 otherpad = gst_object_ref (self->srcpad);
326 GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
328 peer = gst_pad_get_peer (otherpad);
330 ret = gst_pad_get_caps (peer, filter);
331 gst_object_unref (peer);
333 ret = (filter ? gst_caps_ref (filter) : gst_caps_new_any ());
336 gst_object_unref (otherpad);
337 gst_object_unref (self);
343 gst_play_sink_video_convert_finalize (GObject * object)
345 GstPlaySinkVideoConvert *self = GST_PLAY_SINK_VIDEO_CONVERT_CAST (object);
347 gst_object_unref (self->sink_proxypad);
348 g_mutex_free (self->lock);
350 G_OBJECT_CLASS (parent_class)->finalize (object);
353 static GstStateChangeReturn
354 gst_play_sink_video_convert_change_state (GstElement * element,
355 GstStateChange transition)
357 GstStateChangeReturn ret;
358 GstPlaySinkVideoConvert *self = GST_PLAY_SINK_VIDEO_CONVERT_CAST (element);
360 switch (transition) {
361 case GST_STATE_CHANGE_PAUSED_TO_READY:
362 GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
363 unblock_proxypad (self);
364 GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
370 ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
371 if (ret == GST_STATE_CHANGE_FAILURE)
374 switch (transition) {
375 case GST_STATE_CHANGE_PAUSED_TO_READY:
376 GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
377 gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
379 gst_element_set_state (self->conv, GST_STATE_NULL);
380 gst_bin_remove (GST_BIN_CAST (self), self->conv);
384 gst_element_set_state (self->scale, GST_STATE_NULL);
385 gst_bin_remove (GST_BIN_CAST (self), self->scale);
388 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
389 self->sink_proxypad);
391 GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
393 case GST_STATE_CHANGE_READY_TO_PAUSED:
394 GST_PLAY_SINK_VIDEO_CONVERT_LOCK (self);
395 if (!gst_pad_is_blocked (self->sink_proxypad))
396 block_proxypad (self);
397 GST_PLAY_SINK_VIDEO_CONVERT_UNLOCK (self);
406 gst_play_sink_video_convert_class_init (GstPlaySinkVideoConvertClass * klass)
408 GObjectClass *gobject_class;
409 GstElementClass *gstelement_class;
411 GST_DEBUG_CATEGORY_INIT (gst_play_sink_video_convert_debug,
412 "playsinkvideoconvert", 0, "play bin");
414 gobject_class = (GObjectClass *) klass;
415 gstelement_class = (GstElementClass *) klass;
417 gobject_class->finalize = gst_play_sink_video_convert_finalize;
419 gst_element_class_add_pad_template (gstelement_class,
420 gst_static_pad_template_get (&srctemplate));
421 gst_element_class_add_pad_template (gstelement_class,
422 gst_static_pad_template_get (&sinktemplate));
423 gst_element_class_set_details_simple (gstelement_class,
424 "Player Sink Video Converter", "Video/Bin/Converter",
425 "Convenience bin for video conversion",
426 "Sebastian Dröge <sebastian.droege@collabora.co.uk>");
428 gstelement_class->change_state =
429 GST_DEBUG_FUNCPTR (gst_play_sink_video_convert_change_state);
433 gst_play_sink_video_convert_init (GstPlaySinkVideoConvert * self)
435 GstPadTemplate *templ;
437 self->lock = g_mutex_new ();
438 gst_segment_init (&self->segment, GST_FORMAT_UNDEFINED);
440 templ = gst_static_pad_template_get (&sinktemplate);
441 self->sinkpad = gst_ghost_pad_new_no_target_from_template ("sink", templ);
442 gst_pad_set_event_function (self->sinkpad,
443 GST_DEBUG_FUNCPTR (gst_play_sink_video_convert_sink_event));
444 gst_pad_set_getcaps_function (self->sinkpad,
445 GST_DEBUG_FUNCPTR (gst_play_sink_video_convert_getcaps));
447 self->sink_proxypad =
448 GST_PAD_CAST (gst_proxy_pad_get_internal (GST_PROXY_PAD (self->sinkpad)));
450 gst_element_add_pad (GST_ELEMENT_CAST (self), self->sinkpad);
451 gst_object_unref (templ);
453 templ = gst_static_pad_template_get (&srctemplate);
454 self->srcpad = gst_ghost_pad_new_no_target_from_template ("src", templ);
455 gst_pad_set_getcaps_function (self->srcpad,
456 GST_DEBUG_FUNCPTR (gst_play_sink_video_convert_getcaps));
457 gst_element_add_pad (GST_ELEMENT_CAST (self), self->srcpad);
458 gst_object_unref (templ);
460 gst_ghost_pad_set_target (GST_GHOST_PAD_CAST (self->srcpad),
461 self->sink_proxypad);