2 Copyright (C) 2010 Paul Davis
3 Author: Robin Gareus <robin@gareus.org>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program 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
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include <sigc++/bind.h>
21 #include "ardour/tempo.h"
23 #include "ardour_ui.h"
24 #include "video_image_frame.h"
25 #include "public_editor.h"
27 #include "canvas_impl.h"
28 #include "simpleline.h"
29 #include "rgb_macros.h"
30 #include "utils_videotl.h"
32 #include <gtkmm2ext/utils.h>
38 using namespace ARDOUR;
39 using namespace VideoUtils;
41 VideoImageFrame::VideoImageFrame (PublicEditor& ed, ArdourCanvas::Group& parent, int w, int h, std::string vsurl, std::string vfn)
46 , video_server_url(vsurl)
49 pthread_mutex_init(&request_lock, NULL);
50 pthread_mutex_init(&queue_lock, NULL);
52 video_frame_number = -1;
58 printf("New VideoImageFrame (%ix%i) %s - %s\n", w, h, vsurl.c_str(), vfn.c_str());
61 unit_position = editor.frame_to_unit (frame_position);
62 group = new Group (parent, unit_position, 1.0);
63 img_pixbuf = new ArdourCanvas::Pixbuf(*group);
65 Glib::RefPtr<Gdk::Pixbuf> img;
67 img = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true, 8, clip_width, clip_height);
68 img->fill(RGBA_TO_UINT(0,0,0,255));
69 img_pixbuf->property_pixbuf() = img;
72 video_draw_cross(img_pixbuf->property_pixbuf());
74 group->signal_event().connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_videotl_bar_event), _parent));
75 //img_pixbuf->signal_event().connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_videotl_bar_event), _parent));
78 VideoImageFrame::~VideoImageFrame ()
80 if (thread_active) pthread_join(thread_id_tt, NULL);
83 pthread_mutex_destroy(&request_lock);
84 pthread_mutex_destroy(&queue_lock);
88 VideoImageFrame::set_position (framepos_t frame)
90 double new_unit_position = editor.frame_to_unit (frame);
91 group->move (new_unit_position - unit_position, 0.0);
92 frame_position = frame;
93 unit_position = new_unit_position;
97 VideoImageFrame::reposition ()
99 set_position (frame_position);
103 VideoImageFrame::exposeimg ()
106 /* Note: we can not use this thread to update the window
107 * it needs to be done from the Editor's thread idle_update */
108 ImgChanged(); /* EMIT SIGNAL */
112 VideoImageFrame::set_videoframe (framepos_t videoframenumber, int re)
114 if (video_frame_number == videoframenumber && rightend == re) return;
116 video_frame_number = videoframenumber;
118 #if 0 /* dummy mode: print framenumber */
120 snprintf (buf, sizeof(buf), "%li", (long int) videoframenumber);
121 img_pixbuf->property_pixbuf() = pixbuf_from_ustring(g_strdup (buf), get_font_for_style (N_("MarkerText")), 80, 60, Gdk::Color ("#C0C0C0"));
124 #if 1 /* draw "empty frame" while we request the data */
125 Glib::RefPtr<Gdk::Pixbuf> img;
126 img = img_pixbuf->property_pixbuf();
127 img->fill(RGBA_TO_UINT(0,0,0,255));
128 video_draw_cross(img_pixbuf->property_pixbuf());
133 /* request video-frame from decoder in background thread */
134 http_get(video_frame_number);
138 VideoImageFrame::draw_line ()
140 Glib::RefPtr<Gdk::Pixbuf> img;
141 img = img_pixbuf->property_pixbuf();
143 int rowstride = img->get_rowstride();
144 int clip_height = img->get_height();
145 int n_channels = img->get_n_channels();
147 pixels = img->get_pixels();
150 for (y=0;y<clip_height;y++) {
151 p = pixels + y * rowstride;
152 p[0] = 255; p[1] = 255; p[2] = 255;
153 if (n_channels>3) p[3] = 255;
158 VideoImageFrame::cut_rightend ()
160 if (rightend < 0 ) { return; }
161 Glib::RefPtr<Gdk::Pixbuf> img;
162 img = img_pixbuf->property_pixbuf();
164 int rowstride = img->get_rowstride();
165 int clip_height = img->get_height();
166 int clip_width = img->get_width();
167 int n_channels = img->get_n_channels();
169 pixels = img->get_pixels();
170 if (rightend > clip_width) { return; }
173 for (y=0;y<clip_height;++y) {
174 p = pixels + y * rowstride + rightend * n_channels;
175 p[0] = 192; p[1] = 127; p[2] = 127;
176 if (n_channels>3) p[3] = 255;
177 for (x=rightend+1; x<clip_width; ++x) {
178 p = pixels + y * rowstride + x * n_channels;
179 p[0] = 0; p[1] = 0; p[2] = 0;
180 if (n_channels>3) p[3] = 0;
186 http_get_thread (void *arg) {
187 VideoImageFrame *vif = static_cast<VideoImageFrame *>(arg);
189 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
190 pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
191 snprintf(url, sizeof(url), "%s?frame=%li&w=%d&h=%di&file=%s&format=rgb",
192 vif->get_video_server_url().c_str(),
193 (long int) vif->get_req_frame(), vif->get_width(), vif->get_height(),
194 vif->get_video_filename().c_str()
197 int timeout = 1000; // * 5ms -> 5sec
200 res=a3_curl_http_get(url, &status);
201 if (status == 503) Glib::usleep(5000); // try-again
202 } while (status == 503 && --timeout > 0);
204 if (status != 200 || !res) {
205 printf("no-video frame: video-server returned http-status: %d\n", status);
208 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
209 vif->http_download_done(res);
215 VideoImageFrame::http_download_done (char *data){
216 if (queued_request) {
217 http_get_again(want_video_frame_number);
222 /* Image request failed (HTTP error or timeout) */
223 Glib::RefPtr<Gdk::Pixbuf> img;
224 img = img_pixbuf->property_pixbuf();
225 img->fill(RGBA_TO_UINT(128,0,0,255));
226 video_draw_cross(img_pixbuf->property_pixbuf());
230 /* TODO: mark as invalid:
231 * video_frame_number = -1;
232 * TODO: but prevent live-loops when calling update again
235 Glib::RefPtr<Gdk::Pixbuf> tmp, img;
237 tmp = Gdk::Pixbuf::create_from_data ((guint8*) data, Gdk::COLORSPACE_RGB, true, 8, clip_width, clip_height, clip_width*4);
239 tmp = Gdk::Pixbuf::create_from_data ((guint8*) data, Gdk::COLORSPACE_RGB, false, 8, clip_width, clip_height, clip_width*3);
241 img = img_pixbuf->property_pixbuf();
242 tmp->copy_area (0, 0, clip_width, clip_height, img, 0, 0);
249 /* don't request frames too quickly, wait after user has zoomed */
252 if (queued_request) {
253 http_get_again(want_video_frame_number);
255 pthread_mutex_unlock(&request_lock);
260 VideoImageFrame::http_get(framepos_t fn) {
261 if (pthread_mutex_trylock(&request_lock)) {
262 /* remember last request and schedule after the lock has been released. */
263 pthread_mutex_lock(&queue_lock);
265 want_video_frame_number=fn;
266 pthread_mutex_unlock(&queue_lock);
268 /* TODO: cancel request and start a new one
269 * but only if we're waiting for curl request.
270 * don't interrupt http_download_done()
272 * This should work, but requires testing:
274 if (!pthread_cancel(thread_id_tt)) {
275 pthread_mutex_unlock(&request_lock);
281 if (thread_active) pthread_join(thread_id_tt, NULL);
282 pthread_mutex_lock(&queue_lock);
283 queued_request=false;
284 req_video_frame_number=fn;
285 pthread_mutex_unlock(&queue_lock);
286 int rv = pthread_create(&thread_id_tt, NULL, http_get_thread, this);
290 printf("thread creation failed. %i\n",rv);
291 http_download_done(NULL);
296 VideoImageFrame::http_get_again(framepos_t /*fn*/) {
297 pthread_mutex_lock(&queue_lock);
298 queued_request=false;
299 req_video_frame_number=want_video_frame_number;
300 pthread_mutex_unlock(&queue_lock);
302 http_get_thread(this);