Aegisub/src/video_display.cpp

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// Copyright (c) 2005-2010, Rodrigo Braz Monteiro
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// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// * Neither the name of the Aegisub Group nor the names of its contributors
// may be used to endorse or promote products derived from this software
// without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//
// Aegisub Project http://www.aegisub.org/
/// @file video_display.cpp
/// @brief Control displaying a video frame obtained from the video context
/// @ingroup video main_ui
///
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#include "video_display.h"
#include "ass_file.h"
#include "command/command.h"
#include "compat.h"
#include "include/aegisub/context.h"
#include "include/aegisub/hotkey.h"
#include "include/aegisub/menu.h"
#include "options.h"
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#include "retina_helper.h"
#include "spline_curve.h"
#include "subs_controller.h"
#include "threaded_frame_source.h"
#include "utils.h"
#include "video_out_gl.h"
#include "video_context.h"
#include "video_frame.h"
#include "visual_tool.h"
#include <libaegisub/make_unique.h>
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#include <algorithm>
#include <wx/combobox.h>
#include <wx/dataobj.h>
#include <wx/dcclient.h>
#include <wx/menu.h>
#include <wx/textctrl.h>
#include <wx/toolbar.h>
#ifdef HAVE_OPENGL_GL_H
#include <OpenGL/gl.h>
#else
#include <GL/gl.h>
#endif
/// Attribute list for gl canvases; set the canvases to doublebuffered rgba with an 8 bit stencil buffer
int attribList[] = { WX_GL_RGBA , WX_GL_DOUBLEBUFFER, WX_GL_STENCIL_SIZE, 8, 0 };
/// @class VideoOutRenderException
/// @extends VideoOutException
/// @brief An OpenGL error occurred while uploading or displaying a frame
class OpenGlException final : public agi::Exception {
public:
OpenGlException(const char *func, int err)
: agi::Exception(from_wx(wxString::Format("%s failed with error code %d", func, err)))
{ }
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const char * GetName() const override { return "video/opengl"; }
Exception * Copy() const override { return new OpenGlException(*this); }
};
#define E(cmd) cmd; if (GLenum err = glGetError()) throw OpenGlException(#cmd, err)
VideoDisplay::VideoDisplay(
wxToolBar *visualSubToolBar,
bool freeSize,
wxComboBox *zoomBox,
wxWindow* parent,
agi::Context *c)
: wxGLCanvas(parent, -1, attribList)
, autohideTools(OPT_GET("Tool/Visual/Autohide"))
, con(c)
, zoomValue(OPT_GET("Video/Default Zoom")->GetInt() * .125 + .125)
, toolBar(visualSubToolBar)
, zoomBox(zoomBox)
, freeSize(freeSize)
, retina_helper(agi::make_unique<RetinaHelper>(this))
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, scale_factor(retina_helper->GetScaleFactor())
, scale_factor_connection(retina_helper->AddScaleFactorListener([=](int new_scale_factor) {
double new_zoom = zoomValue * new_scale_factor / scale_factor;
scale_factor = new_scale_factor;
SetZoom(new_zoom);
}))
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{
zoomBox->SetValue(wxString::Format("%g%%", zoomValue * 100.));
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zoomBox->Bind(wxEVT_COMBOBOX, &VideoDisplay::SetZoomFromBox, this);
zoomBox->Bind(wxEVT_TEXT_ENTER, &VideoDisplay::SetZoomFromBoxText, this);
con->videoController->Bind(EVT_FRAME_READY, &VideoDisplay::UploadFrameData, this);
slots.push_back(con->videoController->AddVideoOpenListener(&VideoDisplay::UpdateSize, this));
slots.push_back(con->videoController->AddARChangeListener(&VideoDisplay::UpdateSize, this));
slots.push_back(con->subsController->AddFileSaveListener(&VideoDisplay::OnSubtitlesSave, this));
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Bind(wxEVT_PAINT, std::bind(&VideoDisplay::Render, this));
Bind(wxEVT_SIZE, &VideoDisplay::OnSizeEvent, this);
Bind(wxEVT_CONTEXT_MENU, &VideoDisplay::OnContextMenu, this);
Bind(wxEVT_ENTER_WINDOW, &VideoDisplay::OnMouseEvent, this);
Bind(wxEVT_CHAR_HOOK, &VideoDisplay::OnKeyDown, this);
Bind(wxEVT_LEAVE_WINDOW, &VideoDisplay::OnMouseLeave, this);
Bind(wxEVT_LEFT_DCLICK, &VideoDisplay::OnMouseEvent, this);
Bind(wxEVT_LEFT_DOWN, &VideoDisplay::OnMouseEvent, this);
Bind(wxEVT_LEFT_UP, &VideoDisplay::OnMouseEvent, this);
Bind(wxEVT_MOTION, &VideoDisplay::OnMouseEvent, this);
Bind(wxEVT_MOUSEWHEEL, &VideoDisplay::OnMouseWheel, this);
SetCursor(wxNullCursor);
c->videoDisplay = this;
if (con->videoController->IsLoaded())
con->videoController->JumpToFrame(con->videoController->GetFrameN());
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}
VideoDisplay::~VideoDisplay () {
con->videoController->Unbind(EVT_FRAME_READY, &VideoDisplay::UploadFrameData, this);
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}
bool VideoDisplay::InitContext() {
if (!IsShownOnScreen())
return false;
// If this display is in a minimized detached dialog IsShownOnScreen will
// return true, but the client size is guaranteed to be 0
if (GetClientSize() == wxSize(0, 0))
return false;
if (!glContext)
glContext = agi::make_unique<wxGLContext>(this);
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SetCurrent(*glContext);
return true;
}
void VideoDisplay::UploadFrameData(FrameReadyEvent &evt) {
pending_frame = evt.frame;
Render();
}
void VideoDisplay::Render() try {
if (!con->videoController->IsLoaded() || !InitContext() || (!videoOut && !pending_frame))
return;
if (!videoOut)
videoOut = agi::make_unique<VideoOutGL>();
if (!tool)
cmd::call("video/tool/cross", con);
try {
if (pending_frame) {
videoOut->UploadFrameData(*pending_frame);
pending_frame.reset();
}
}
catch (const VideoOutInitException& err) {
wxLogError(
"Failed to initialize video display. Closing other running "
"programs and updating your video card drivers may fix this.\n"
"Error message reported: %s",
err.GetMessage());
con->videoController->SetVideo("");
return;
}
catch (const VideoOutRenderException& err) {
wxLogError(
"Could not upload video frame to graphics card.\n"
"Error message reported: %s",
err.GetMessage());
return;
}
if (videoSize.GetWidth() == 0) videoSize.SetWidth(1);
if (videoSize.GetHeight() == 0) videoSize.SetHeight(1);
if (!viewport_height || !viewport_width)
PositionVideo();
videoOut->Render(viewport_left, viewport_bottom, viewport_width, viewport_height);
E(glViewport(0, std::min(viewport_bottom, 0), videoSize.GetWidth(), videoSize.GetHeight()));
E(glMatrixMode(GL_PROJECTION));
E(glLoadIdentity());
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E(glOrtho(0.0f, videoSize.GetWidth() / scale_factor, videoSize.GetHeight() / scale_factor, 0.0f, -1000.0f, 1000.0f));
if (OPT_GET("Video/Overscan Mask")->GetBool()) {
double ar = con->videoController->GetAspectRatioValue();
// Based on BBC's guidelines: http://www.bbc.co.uk/guidelines/dq/pdf/tv/tv_standards_london.pdf
// 16:9 or wider
if (ar > 1.75) {
DrawOverscanMask(.1f, .05f);
DrawOverscanMask(0.035f, 0.035f);
}
// Less wide than 16:9 (use 4:3 standard)
else {
DrawOverscanMask(.067f, .05f);
DrawOverscanMask(0.033f, 0.035f);
}
}
if ((mouse_pos || !autohideTools->GetBool()) && tool)
tool->Draw();
SwapBuffers();
}
catch (const agi::Exception &err) {
wxLogError(
"An error occurred trying to render the video frame on the screen.\n"
"Error message reported: %s",
err.GetChainedMessage());
con->videoController->SetVideo("");
}
void VideoDisplay::DrawOverscanMask(float horizontal_percent, float vertical_percent) const {
Vector2D v(viewport_width, viewport_height);
Vector2D size = Vector2D(horizontal_percent, vertical_percent) / 2 * v;
// Clockwise from top-left
Vector2D corners[] = {
size,
Vector2D(viewport_width - size.X(), size),
v - size,
Vector2D(size, viewport_height - size.Y())
};
// Shift to compensate for black bars
Vector2D pos(viewport_left, viewport_top);
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for (auto& corner : corners)
corner = corner + pos;
int count = 0;
std::vector<float> points;
for (size_t i = 0; i < 4; ++i) {
size_t prev = (i + 3) % 4;
size_t next = (i + 1) % 4;
count += SplineCurve(
(corners[prev] + corners[i] * 4) / 5,
corners[i], corners[i],
(corners[next] + corners[i] * 4) / 5)
.GetPoints(points);
}
OpenGLWrapper gl;
gl.SetFillColour(wxColor(30, 70, 200), .5f);
gl.SetLineColour(*wxBLACK, 0, 1);
std::vector<int> vstart(1, 0);
std::vector<int> vcount(1, count);
gl.DrawMultiPolygon(points, vstart, vcount, Vector2D(viewport_left, viewport_top), Vector2D(viewport_width, viewport_height), true);
}
void VideoDisplay::PositionVideo() {
if (!con->videoController->IsLoaded() || !IsShownOnScreen()) return;
viewport_left = 0;
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viewport_bottom = GetClientSize().GetHeight() * scale_factor - videoSize.GetHeight();
viewport_top = 0;
viewport_width = videoSize.GetWidth();
viewport_height = videoSize.GetHeight();
if (freeSize) {
int vidW = con->videoController->GetWidth();
int vidH = con->videoController->GetHeight();
AspectRatio arType = con->videoController->GetAspectRatioType();
double displayAr = double(viewport_width) / viewport_height;
double videoAr = arType == AspectRatio::Default ? double(vidW) / vidH : con->videoController->GetAspectRatioValue();
// Window is wider than video, blackbox left/right
if (displayAr - videoAr > 0.01f) {
int delta = viewport_width - videoAr * viewport_height;
viewport_left = delta / 2;
viewport_width -= delta;
}
// Video is wider than window, blackbox top/bottom
else if (videoAr - displayAr > 0.01f) {
int delta = viewport_height - viewport_width / videoAr;
viewport_top = viewport_bottom = delta / 2;
viewport_height -= delta;
}
}
if (tool)
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tool->SetDisplayArea(viewport_left / scale_factor, viewport_top / scale_factor,
viewport_width / scale_factor, viewport_height / scale_factor);
Render();
}
void VideoDisplay::UpdateSize() {
if (!con->videoController->IsLoaded() || !IsShownOnScreen()) return;
videoSize.Set(con->videoController->GetWidth(), con->videoController->GetHeight());
videoSize *= zoomValue;
if (con->videoController->GetAspectRatioType() != AspectRatio::Default)
videoSize.SetWidth(videoSize.GetHeight() * con->videoController->GetAspectRatioValue());
wxEventBlocker blocker(this);
if (freeSize) {
wxWindow *top = GetParent();
while (!top->IsTopLevel()) top = top->GetParent();
wxSize cs = GetClientSize();
wxSize oldSize = top->GetSize();
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top->SetSize(top->GetSize() + videoSize / scale_factor - cs);
SetClientSize(cs + top->GetSize() - oldSize);
}
else {
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SetMinClientSize(videoSize / scale_factor);
SetMaxClientSize(videoSize / scale_factor);
GetGrandParent()->Layout();
}
PositionVideo();
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}
void VideoDisplay::OnSizeEvent(wxSizeEvent &event) {
if (freeSize) {
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videoSize = GetClientSize() * scale_factor;
PositionVideo();
zoomValue = double(viewport_height) / con->videoController->GetHeight();
zoomBox->ChangeValue(wxString::Format("%g%%", zoomValue * 100.));
}
else {
PositionVideo();
}
}
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void VideoDisplay::OnMouseEvent(wxMouseEvent& event) {
if (event.ButtonDown())
SetFocus();
last_mouse_pos = mouse_pos = event.GetPosition();
if (tool)
tool->OnMouseEvent(event);
}
void VideoDisplay::OnMouseLeave(wxMouseEvent& event) {
mouse_pos = Vector2D();
if (tool)
tool->OnMouseEvent(event);
}
void VideoDisplay::OnMouseWheel(wxMouseEvent& event) {
if (int wheel = event.GetWheelRotation()) {
if (ForwardMouseWheelEvent(this, event))
SetZoom(zoomValue + .125 * (wheel / event.GetWheelDelta()));
}
}
void VideoDisplay::OnContextMenu(wxContextMenuEvent&) {
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if (!context_menu.get()) context_menu = menu::GetMenu("video_context", con);
SetCursor(wxNullCursor);
menu::OpenPopupMenu(context_menu.get(), this);
}
void VideoDisplay::OnKeyDown(wxKeyEvent &event) {
hotkey::check("Video", con, event);
}
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void VideoDisplay::SetZoom(double value) {
zoomValue = std::max(value, .125);
size_t selIndex = zoomValue / .125 - 1;
if (selIndex < zoomBox->GetCount())
zoomBox->SetSelection(selIndex);
zoomBox->ChangeValue(wxString::Format("%g%%", zoomValue * 100.));
UpdateSize();
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}
void VideoDisplay::SetZoomFromBox(wxCommandEvent &) {
int sel = zoomBox->GetSelection();
if (sel != wxNOT_FOUND) {
zoomValue = (sel + 1) * .125;
UpdateSize();
}
}
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void VideoDisplay::SetZoomFromBoxText(wxCommandEvent &) {
wxString strValue = zoomBox->GetValue();
if (strValue.EndsWith("%"))
strValue.RemoveLast();
double value;
if (strValue.ToDouble(&value))
SetZoom(value / 100.);
}
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void VideoDisplay::SetTool(std::unique_ptr<VisualToolBase> new_tool) {
toolBar->ClearTools();
toolBar->Realize();
toolBar->Show(false);
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tool = std::move(new_tool);
tool->SetToolbar(toolBar);
// Update size as the new typesetting tool may have changed the subtoolbar size
if (!freeSize)
UpdateSize();
else {
// UpdateSize fits the window to the video, which we don't want to do
GetGrandParent()->Layout();
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tool->SetDisplayArea(viewport_left / scale_factor, viewport_top / scale_factor,
viewport_width / scale_factor, viewport_height / scale_factor);
}
}
bool VideoDisplay::ToolIsType(std::type_info const& type) const {
return tool && typeid(*tool) == type;
}
Vector2D VideoDisplay::GetMousePosition() const {
return last_mouse_pos ? tool->ToScriptCoords(last_mouse_pos) : last_mouse_pos;
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}
void VideoDisplay::Unload() {
glContext.reset();
videoOut.reset();
tool.reset();
pending_frame.reset();
}
void VideoDisplay::OnSubtitlesSave() {
con->ass->SaveUIState("Video Zoom Percent", std::to_string(zoomValue));
}