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;
40 VideoImageFrame::VideoImageFrame (PublicEditor& ed, ArdourCanvas::Group& parent, int w, int h, std::string vsurl, std::string vfn)
45 , video_server_url(vsurl)
48 pthread_mutex_init(&request_lock, NULL);
49 pthread_mutex_init(&queue_lock, NULL);
51 video_frame_number = -1;
57 printf("New VideoImageFrame (%ix%i) %s - %s\n", w, h, vsurl.c_str(), vfn.c_str());
60 unit_position = editor.frame_to_unit (frame_position);
61 group = new Group (parent, unit_position, 1.0);
62 img_pixbuf = new ArdourCanvas::Pixbuf(*group);
64 Glib::RefPtr<Gdk::Pixbuf> img;
66 img = Gdk::Pixbuf::create(Gdk::COLORSPACE_RGB, true, 8, clip_width, clip_height);
67 img->fill(RGBA_TO_UINT(0,0,0,255));
68 img_pixbuf->property_pixbuf() = img;
71 video_draw_cross(img_pixbuf->property_pixbuf());
73 group->signal_event().connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_videotl_bar_event), _parent));
74 //img_pixbuf->signal_event().connect (sigc::bind (sigc::mem_fun (editor, &PublicEditor::canvas_videotl_bar_event), _parent));
77 VideoImageFrame::~VideoImageFrame ()
79 if (thread_active) pthread_join(thread_id_tt, NULL);
82 pthread_mutex_destroy(&request_lock);
83 pthread_mutex_destroy(&queue_lock);
87 VideoImageFrame::set_position (framepos_t frame)
89 double new_unit_position = editor.frame_to_unit (frame);
90 group->move (new_unit_position - unit_position, 0.0);
91 frame_position = frame;
92 unit_position = new_unit_position;
96 VideoImageFrame::reposition ()
98 set_position (frame_position);
102 VideoImageFrame::exposeimg ()
105 /* Note: we can not use this thread to update the window
106 * it needs to be done from the Editor's thread idle_update */
107 ImgChanged(); /* EMIT SIGNAL */
111 VideoImageFrame::set_videoframe (framepos_t videoframenumber, int re)
113 if (video_frame_number == videoframenumber && rightend == re) return;
115 video_frame_number = videoframenumber;
117 #if 0 /* dummy mode: print framenumber */
119 snprintf (buf, sizeof(buf), "%li", (long int) videoframenumber);
120 img_pixbuf->property_pixbuf() = pixbuf_from_ustring(g_strdup (buf), get_font_for_style (N_("MarkerText")), 80, 60, Gdk::Color ("#C0C0C0"));
123 #if 1 /* draw "empty frame" while we request the data */
124 Glib::RefPtr<Gdk::Pixbuf> img;
125 img = img_pixbuf->property_pixbuf();
126 img->fill(RGBA_TO_UINT(0,0,0,255));
127 video_draw_cross(img_pixbuf->property_pixbuf());
132 /* request video-frame from decoder in background thread */
133 http_get(video_frame_number);
137 VideoImageFrame::draw_line ()
139 Glib::RefPtr<Gdk::Pixbuf> img;
140 img = img_pixbuf->property_pixbuf();
142 int rowstride = img->get_rowstride();
143 int clip_height = img->get_height();
144 int n_channels = img->get_n_channels();
146 pixels = img->get_pixels();
149 for (y=0;y<clip_height;y++) {
150 p = pixels + y * rowstride;
151 p[0] = 255; p[1] = 255; p[2] = 255;
152 if (n_channels>3) p[3] = 255;
157 VideoImageFrame::cut_rightend ()
159 if (rightend < 0 ) { return; }
160 Glib::RefPtr<Gdk::Pixbuf> img;
161 img = img_pixbuf->property_pixbuf();
163 int rowstride = img->get_rowstride();
164 int clip_height = img->get_height();
165 int clip_width = img->get_width();
166 int n_channels = img->get_n_channels();
168 pixels = img->get_pixels();
169 if (rightend > clip_width) { return; }
172 for (y=0;y<clip_height;++y) {
173 p = pixels + y * rowstride + rightend * n_channels;
174 p[0] = 192; p[1] = 127; p[2] = 127;
175 if (n_channels>3) p[3] = 255;
176 for (x=rightend+1; x<clip_width; ++x) {
177 p = pixels + y * rowstride + x * n_channels;
178 p[0] = 0; p[1] = 0; p[2] = 0;
179 if (n_channels>3) p[3] = 0;
185 http_get_thread (void *arg) {
186 VideoImageFrame *vif = static_cast<VideoImageFrame *>(arg);
188 pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, NULL);
189 pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
190 snprintf(url, sizeof(url), "%s?frame=%li&w=%d&h=%di&file=%s&format=rgb",
191 vif->get_video_server_url().c_str(),
192 (long int) vif->get_req_frame(), vif->get_width(), vif->get_height(),
193 vif->get_video_filename().c_str()
196 int timeout = 1000; // * 5ms -> 5sec
199 res=curl_http_get(url, &status);
200 if (status == 503) Glib::usleep(5000); // try-again
201 } while (status == 503 && --timeout > 0);
203 if (status != 200 || !res) {
204 printf("no-video frame: video-server returned http-status: %d\n", status);
207 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, NULL);
208 vif->http_download_done(res);
214 VideoImageFrame::http_download_done (char *data){
215 if (queued_request) {
216 http_get_again(want_video_frame_number);
221 /* Image request failed (HTTP error or timeout) */
222 Glib::RefPtr<Gdk::Pixbuf> img;
223 img = img_pixbuf->property_pixbuf();
224 img->fill(RGBA_TO_UINT(128,0,0,255));
225 video_draw_cross(img_pixbuf->property_pixbuf());
229 /* TODO: mark as invalid:
230 * video_frame_number = -1;
231 * TODO: but prevent live-loops when calling update again
234 Glib::RefPtr<Gdk::Pixbuf> tmp, img;
236 tmp = Gdk::Pixbuf::create_from_data ((guint8*) data, Gdk::COLORSPACE_RGB, true, 8, clip_width, clip_height, clip_width*4);
238 tmp = Gdk::Pixbuf::create_from_data ((guint8*) data, Gdk::COLORSPACE_RGB, false, 8, clip_width, clip_height, clip_width*3);
240 img = img_pixbuf->property_pixbuf();
241 tmp->copy_area (0, 0, clip_width, clip_height, img, 0, 0);
248 /* don't request frames too quickly, wait after user has zoomed */
251 if (queued_request) {
252 http_get_again(want_video_frame_number);
254 pthread_mutex_unlock(&request_lock);
259 VideoImageFrame::http_get(framepos_t fn) {
260 if (pthread_mutex_trylock(&request_lock)) {
261 /* remember last request and schedule after the lock has been released. */
262 pthread_mutex_lock(&queue_lock);
264 want_video_frame_number=fn;
265 pthread_mutex_unlock(&queue_lock);
267 /* TODO: cancel request and start a new one
268 * but only if we're waiting for curl request.
269 * don't interrupt http_download_done()
271 * This should work, but requires testing:
273 if (!pthread_cancel(thread_id_tt)) {
274 pthread_mutex_unlock(&request_lock);
280 if (thread_active) pthread_join(thread_id_tt, NULL);
281 pthread_mutex_lock(&queue_lock);
282 queued_request=false;
283 req_video_frame_number=fn;
284 pthread_mutex_unlock(&queue_lock);
285 int rv = pthread_create(&thread_id_tt, NULL, http_get_thread, this);
289 printf("thread creation failed. %i\n",rv);
290 http_download_done(NULL);
295 VideoImageFrame::http_get_again(framepos_t /*fn*/) {
296 pthread_mutex_lock(&queue_lock);
297 queued_request=false;
298 req_video_frame_number=want_video_frame_number;
299 pthread_mutex_unlock(&queue_lock);
301 http_get_thread(this);