Don't try opening error dialogues from the GL thread.

[dcpomatic.git] / src / wx / gl_video_view.cc

diff --git a/src/wx/gl_video_view.cc b/src/wx/gl_video_view.cc
index 0e8e459d87b66cc0695f60ae85ef07c98226c0ea..836b3eb351584b790e9c6f077c4e090b3d73277a 100644 (file)
--- a/src/wx/gl_video_view.cc
+++ b/src/wx/gl_video_view.cc
@@ -20,9 +20,13 @@
 
 #include "gl_video_view.h"
 #include "film_viewer.h"
+#include "wx_util.h"
 #include "lib/image.h"
 #include "lib/dcpomatic_assert.h"
 #include "lib/exceptions.h"
+#include "lib/cross.h"
+#include "lib/player_video.h"
+#include "lib/butler.h"
 #include <boost/bind.hpp>
 #include <iostream>
 
@@ -52,11 +56,18 @@ using boost::optional;
 GLVideoView::GLVideoView (FilmViewer* viewer, wxWindow *parent)
        : VideoView (viewer)
        , _vsync_enabled (false)
+       , _thread (0)
+       , _playing (false)
+       , _one_shot (false)
 {
        _canvas = new wxGLCanvas (parent, wxID_ANY, 0, wxDefaultPosition, wxDefaultSize, wxFULL_REPAINT_ON_RESIZE);
-       _context = new wxGLContext (_canvas);
        _canvas->Bind (wxEVT_PAINT, boost::bind(&GLVideoView::paint, this));
        _canvas->Bind (wxEVT_SIZE, boost::bind(boost::ref(Sized)));
+       _canvas->Bind (wxEVT_CREATE, boost::bind(&GLVideoView::create, this));
+
+       _canvas->Bind (wxEVT_TIMER, boost::bind(&GLVideoView::check_for_butler_errors, this));
+       _timer.reset (new wxTimer(_canvas));
+       _timer->Start (2000);
 
 #if defined(DCPOMATIC_LINUX) && defined(DCPOMATIC_HAVE_GLX_SWAP_INTERVAL_EXT)
        if (_canvas->IsExtensionSupported("GLX_EXT_swap_control")) {
@@ -70,8 +81,11 @@ GLVideoView::GLVideoView (FilmViewer* viewer, wxWindow *parent)
 #ifdef DCPOMATIC_WINDOWS
        if (_canvas->IsExtensionSupported("WGL_EXT_swap_control")) {
                /* Enable vsync */
-               wglSwapIntervalEXT (1);
-               _vsync_enabled = true;
+               PFNWGLSWAPINTERVALEXTPROC swap = (PFNWGLSWAPINTERVALEXTPROC) wglGetProcAddress("wglSwapIntervalEXT");
+               if (swap) {
+                       swap (1);
+                       _vsync_enabled = true;
+               }
        }
 
 #endif
@@ -90,12 +104,25 @@ GLVideoView::GLVideoView (FilmViewer* viewer, wxWindow *parent)
 
 GLVideoView::~GLVideoView ()
 {
+       _thread->interrupt ();
+       _thread->join ();
+       delete _thread;
+
        glDeleteTextures (1, &_id);
-       delete _context;
+}
+
+void
+GLVideoView::check_for_butler_errors ()
+{
+       try {
+               _viewer->butler()->rethrow ();
+       } catch (DecodeError& e) {
+               error_dialog (get(), e.what());
+       }
 }
 
 static void
-       check_gl_error (char const * last)
+check_gl_error (char const * last)
 {
        GLenum const e = glGetError ();
        if (e != GL_NO_ERROR) {
@@ -106,11 +133,7 @@ static void
 void
 GLVideoView::paint ()
 {
-        _viewer->state_timer().set("paint-panel");
-       _canvas->SetCurrent (*_context);
-       wxPaintDC dc (_canvas);
-       draw ();
-       _viewer->state_timer().unset();
+       request_one_shot ();
 }
 
 void
@@ -119,8 +142,9 @@ GLVideoView::update ()
        if (!_canvas->IsShownOnScreen()) {
                return;
        }
-       wxClientDC dc (_canvas);
-       draw ();
+       /* XXX_b */
+//     wxClientDC dc (_canvas);
+//     draw ();
 }
 
 void
@@ -155,9 +179,11 @@ GLVideoView::draw ()
 
        glTranslatef (0, 0, 0);
 
+       dcp::Size const out_size = _viewer->out_size ();
+
        if (_size) {
+               /* Render our image (texture) */
                glBegin (GL_QUADS);
-
                glTexCoord2f (0, 1);
                glVertex2f (0, _size->height);
                glTexCoord2f (1, 1);
@@ -166,11 +192,19 @@ GLVideoView::draw ()
                glVertex2f (_size->width, 0);
                glTexCoord2f (0, 0);
                glVertex2f (0, 0);
-
+               glEnd ();
+       } else {
+               /* No image, so just fill with black */
+               glBegin (GL_QUADS);
+               glColor3ub (0, 0, 0);
+               glVertex2f (0, 0);
+               glVertex2f (out_size.width, 0);
+               glVertex2f (out_size.width, out_size.height);
+               glVertex2f (0, out_size.height);
+               glVertex2f (0, 0);
                glEnd ();
        }
 
-       dcp::Size const out_size = _viewer->out_size ();
        wxSize const canvas_size = _canvas->GetSize ();
 
        if (!_viewer->pad_black() && out_size.width < canvas_size.GetWidth()) {
@@ -245,3 +279,89 @@ GLVideoView::set_image (shared_ptr<const Image> image)
        glTexParameterf (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
        check_gl_error ("glTexParameterf");
 }
+
+void
+GLVideoView::start ()
+{
+       boost::mutex::scoped_lock lm (_playing_mutex);
+       _playing = true;
+       _playing_condition.notify_all ();
+}
+
+void
+GLVideoView::stop ()
+{
+       boost::mutex::scoped_lock lm (_playing_mutex);
+       _playing = false;
+}
+
+void
+GLVideoView::thread ()
+try
+{
+       /* XXX_b: check all calls and signal emissions in this method & protect them if necessary */
+       _context = new wxGLContext (_canvas);
+       _canvas->SetCurrent (*_context);
+
+       while (true) {
+               boost::mutex::scoped_lock lm (_playing_mutex);
+               while (!_playing && !_one_shot) {
+                       _playing_condition.wait (lm);
+               }
+               _one_shot = false;
+               lm.unlock ();
+
+               if (length() != dcpomatic::DCPTime()) {
+                       dcpomatic::DCPTime const next = position() + one_video_frame();
+
+                       if (next >= length()) {
+                               _viewer->stop ();
+                               _viewer->emit_finished ();
+                               continue;
+                       }
+
+                       get_next_frame (false);
+                       set_image (player_video().first->image(bind(&PlayerVideo::force, _1, AV_PIX_FMT_RGB24), false, true));
+               }
+               draw ();
+
+               while (time_until_next_frame() < 5) {
+                       get_next_frame (true);
+               }
+
+               boost::this_thread::interruption_point ();
+               dcpomatic_sleep_milliseconds (time_until_next_frame());
+       }
+
+       delete _context;
+}
+catch (boost::thread_interrupted& e)
+{
+       /* XXX_b: store exceptions here */
+       delete _context;
+       return;
+}
+
+bool
+GLVideoView::display_next_frame (bool non_blocking)
+{
+       bool const r = get_next_frame (non_blocking);
+       request_one_shot ();
+       return r;
+}
+
+void
+GLVideoView::request_one_shot ()
+{
+       boost::mutex::scoped_lock lm (_playing_mutex);
+       _one_shot = true;
+       _playing_condition.notify_all ();
+}
+
+void
+GLVideoView::create ()
+{
+       if (!_thread) {
+               _thread = new boost::thread (boost::bind(&GLVideoView::thread, this));
+       }
+}