4 * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "crossfade.h"
25 #include "overlayframe.h"
32 REGISTER_PLUGIN(CrossfadeMain)
37 CrossfadeMain::CrossfadeMain(PluginServer *server)
38 : PluginAClient(server)
42 CrossfadeMain::~CrossfadeMain()
46 const char* CrossfadeMain::plugin_title() { return N_("Crossfade"); }
47 int CrossfadeMain::is_transition() { return 1; }
48 int CrossfadeMain::uses_gui() { return 0; }
52 int CrossfadeMain::process_realtime(int64_t size,
56 double intercept = (double)PluginClient::get_source_position() /
57 PluginClient::get_total_len();
58 double slope = (double)1 / PluginClient::get_total_len();
60 //printf("CrossfadeMain::process_realtime %f %f\n", intercept, slope);
61 double *incoming_samples = incoming->get_data();
62 double *outgoing_samples = outgoing->get_data();
63 for(int i = 0; i < size; i++)
65 incoming_samples[i] = outgoing_samples[i] * ((double)1 - (slope * i + intercept)) +
66 incoming_samples[i] * (slope * i + intercept);