2 Copyright (C) 2016 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program 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
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
19 #include <cairomm/context.h>
20 #include <cairomm/surface.h>
21 #include <pangomm/layout.h>
23 #include "pbd/compose.h"
24 #include "pbd/debug.h"
25 #include "pbd/failed_constructor.h"
27 #include "ardour/debug.h"
31 using namespace ARDOUR;
35 using namespace ArdourSurface;
39 #include "pbd/abstract_ui.cc" // instantiate template
41 const int Push2::cols = 960;
42 const int Push2::rows = 160;
43 const int Push2::pixels_per_row = 1024;
45 #define ABLETON 0x2982
48 Push2::Push2 (Session& s)
49 : ControlProtocol (s, string (X_("Ableton Push2")))
50 , AbstractUI<Push2Request> (name())
53 , frame_buffer (Cairo::ImageSurface::create (Cairo::FORMAT_ARGB32, cols, rows))
65 if ((handle = libusb_open_device_with_vid_pid (NULL, ABLETON, PUSH2)) == 0) {
69 libusb_claim_interface (handle, 0x00);
71 device_frame_buffer[0] = new uint16_t[rows*pixels_per_row];
72 device_frame_buffer[1] = new uint16_t[rows*pixels_per_row];
74 memset (device_frame_buffer[0], 0, sizeof (uint16_t) * rows * pixels_per_row);
75 memset (device_frame_buffer[1], 0, sizeof (uint16_t) * rows * pixels_per_row);
77 frame_header[0] = 0xef;
78 frame_header[1] = 0xcd;
79 frame_header[2] = 0xab;
80 frame_header[3] = 0x89;
81 memset (&frame_header[4], 0, 12);
89 vblank_connection.disconnect ();
92 libusb_release_interface (handle, 0x00);
93 libusb_close (handle);
96 delete [] device_frame_buffer[0];
97 device_frame_buffer[0] = 0;
99 delete [] device_frame_buffer[1];
100 device_frame_buffer[1] = 0;
108 libusb_device_handle *h;
111 if ((h = libusb_open_device_with_vid_pid (NULL, ABLETON, PUSH2)) == 0) {
112 DEBUG_TRACE (DEBUG::Push2, "no Push2 device found\n");
117 DEBUG_TRACE (DEBUG::Push2, "Push2 device located\n");
122 Push2::request_factory (uint32_t num_requests)
124 /* AbstractUI<T>::request_buffer_factory() is a template method only
125 instantiated in this source module. To provide something visible for
126 use in the interface/descriptor, we have this static method that is
129 return request_buffer_factory (num_requests);
133 Push2::do_request (Push2Request * req)
135 DEBUG_TRACE (DEBUG::Push2, string_compose ("doing request type %1\n", req->type));
136 if (req->type == CallSlot) {
138 call_slot (MISSING_INVALIDATOR, req->the_slot);
140 } else if (req->type == Quit) {
155 /** render host-side frame buffer (a Cairo ImageSurface) to the current
156 * device-side frame buffer. The device frame buffer will be pushed to the
157 * device on the next call to vblank()
163 /* ensure that all drawing has been done before we fetch pixel data */
165 frame_buffer->flush ();
167 const int stride = 3840; /* bytes per row for Cairo::FORMAT_ARGB32 */
168 const uint8_t* data = frame_buffer->get_data ();
170 /* fill frame buffer (320kB) */
172 Glib::Threads::Mutex::Lock lm (fb_lock);
174 uint16_t* fb = (uint16_t*) device_frame_buffer[device_buffer];
176 for (int row = 0; row < rows; ++row) {
178 const uint8_t* dp = data + row * stride;
180 for (int col = 0; col < cols; ++col) {
182 /* fetch r, g, b (range 0..255). Ignore alpha */
184 const int r = (*((const uint32_t*)dp) >> 16) & 0xff;
185 const int g = (*((const uint32_t*)dp) >> 8) & 0xff;
186 const int b = *((const uint32_t*)dp) & 0xff;
188 /* convert to 5 bits, 6 bits, 5 bits, respectively */
189 /* generate 16 bit BGB565 value */
191 *fb++ = (r >> 3) | ((g & 0xfc) << 3) | ((b & 0xf8) << 8);
196 /* skip 128 bytes to next line. This is filler, used to avoid line borders occuring in the middle of 512
200 fb += 64; /* 128 bytes = 64 int16_t */
203 /* swap buffers (under lock protection) */
204 // device_buffer = (device_buffer ? 0 : 1);
213 const int timeout_msecs = 1000;
216 if ((err = libusb_bulk_transfer (handle, 0x01, frame_header, sizeof (frame_header), &transferred, timeout_msecs))) {
221 Glib::Threads::Mutex::Lock lm (fb_lock);
223 if ((err = libusb_bulk_transfer (handle, 0x01, (uint8_t*) device_frame_buffer[device_buffer] , 2 * rows * pixels_per_row, &transferred, timeout_msecs))) {
232 Push2::set_active (bool yn)
234 DEBUG_TRACE (DEBUG::Push2, string_compose("Push2Protocol::set_active init with yn: '%1'\n", yn));
236 if (yn == active()) {
243 DEBUG_TRACE (DEBUG::Push2, "device open failed\n");
248 /* start event loop */
252 // connect_session_signals ();
256 Cairo::RefPtr<Cairo::Context> context = Cairo::Context::create (frame_buffer);
258 cerr << "Cannot create context\n";
261 Glib::RefPtr<Pango::Layout> layout = Pango::Layout::create (context);
263 cerr << "Cannot create layout\n";
267 layout->set_text ("hello, Ardour");
268 Pango::FontDescription fd ("Sans Bold 12");
269 layout->set_font_description (fd);
271 context->set_source_rgb (0.0, 1.0, 1.0);
272 context->rectangle (0, 0, 960, 160);
274 context->set_source_rgb (0.0, 0.0, 0.0);
275 context->rectangle (50, 50, 860, 60);
277 context->move_to (60, 60);
278 context->set_source_rgb ((random()%255) / 255.0, (random()%255) / 255.0, (random()%255) / 255.0);
279 layout->update_from_cairo_context (context);
280 layout->show_in_cairo_context (context);
284 /* set up periodic task used to push a frame buffer to the
285 * device (25fps). The device can handle 60fps, but we don't
286 * need that frame rate.
289 Glib::RefPtr<Glib::TimeoutSource> vblank_timeout = Glib::TimeoutSource::create (40); // milliseconds
290 vblank_connection = vblank_timeout->connect (sigc::mem_fun (*this, &Push2::vblank));
291 vblank_timeout->attach (main_loop()->get_context());
300 ControlProtocol::set_active (yn);
302 DEBUG_TRACE (DEBUG::Push2, string_compose("Push2Protocol::set_active done with yn: '%1'\n", yn));