Aegisub/src/subs_preview.cpp
Thomas Goyne 4bdccb889c Reuse buffers for video frames
At least on OS X, allocating the buffers is one of the more expensive
parts of video playback, and on an arbitrary 720p H.264 file with simple
subtitles this cuts CPU usage while playing by about 30%.
2014-06-12 17:06:25 -07:00

149 lines
4.6 KiB
C++

// Copyright (c) 2007, Rodrigo Braz Monteiro
// 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 subs_preview.cpp
/// @brief Preview control using a dummy video provider and subtitles provider to render a preview
/// @ingroup custom_control
///
#include "ass_dialogue.h"
#include "ass_file.h"
#include "ass_style.h"
#include "dialog_progress.h"
#include "subs_preview.h"
#include "include/aegisub/subtitles_provider.h"
#include "video_frame.h"
#include "video_provider_dummy.h"
#include <libaegisub/make_unique.h>
#include <wx/dcclient.h>
#include <wx/msgdlg.h>
SubtitlesPreview::SubtitlesPreview(wxWindow *parent, wxSize size, int winStyle, agi::Color col)
: wxWindow(parent, -1, wxDefaultPosition, size, winStyle)
, style(new AssStyle)
, back_color(col)
, sub_file(agi::make_unique<AssFile>())
, line(new AssDialogue)
{
line->Text = "{\\q2}preview";
SetStyle(*style);
sub_file->LoadDefault();
sub_file->Styles.push_back(*style);
sub_file->Events.push_back(*line);
SetSizeHints(size.GetWidth(), size.GetHeight(), -1, -1);
wxSizeEvent evt(size);
OnSize(evt);
UpdateBitmap();
Bind(wxEVT_PAINT, &SubtitlesPreview::OnPaint, this);
Bind(wxEVT_SIZE, &SubtitlesPreview::OnSize, this);
}
SubtitlesPreview::~SubtitlesPreview() {
}
void SubtitlesPreview::SetStyle(AssStyle const& new_style) {
*style = new_style;
style->name = "Default";
style->alignment = 5;
std::fill(style->Margin.begin(), style->Margin.end(), 0);
style->UpdateData();
UpdateBitmap();
}
void SubtitlesPreview::SetText(std::string const& text) {
std::string new_text = "{\\q2}" + text;
if (new_text != line->Text) {
line->Text = new_text;
UpdateBitmap();
}
}
void SubtitlesPreview::SetColour(agi::Color col) {
if (col != back_color) {
back_color = col;
vid = agi::make_unique<DummyVideoProvider>(0.0, 10, bmp->GetWidth(), bmp->GetHeight(), back_color, true);
UpdateBitmap();
}
}
void SubtitlesPreview::UpdateBitmap() {
if (!vid) return;
VideoFrame frame;
vid->GetFrame(0, frame);
if (provider) {
try {
provider->LoadSubtitles(sub_file.get());
provider->DrawSubtitles(frame, 0.1);
}
catch (...) { }
}
// Convert frame to bitmap
*bmp = static_cast<wxBitmap>(GetImage(frame));
Refresh();
}
void SubtitlesPreview::OnPaint(wxPaintEvent &) {
wxPaintDC(this).DrawBitmap(*bmp, 0, 0);
}
void SubtitlesPreview::OnSize(wxSizeEvent &evt) {
if (bmp.get() && evt.GetSize() == bmp->GetSize()) return;
int w = evt.GetSize().GetWidth();
int h = evt.GetSize().GetHeight();
bmp = agi::make_unique<wxBitmap>(w, h, -1);
vid = agi::make_unique<DummyVideoProvider>(0.0, 10, w, h, back_color, true);
try {
if (!progress)
progress = agi::make_unique<DialogProgress>(this);
if (!provider)
provider = SubtitlesProviderFactory::GetProvider(progress.get());
}
catch (...) {
wxMessageBox(
"Could not get any subtitles provider for the preview box. Make "
"sure that you have a provider installed.",
"No subtitles provider", wxOK | wxICON_ERROR | wxCENTER);
}
sub_file->SetScriptInfo("PlayResX", std::to_string(w));
sub_file->SetScriptInfo("PlayResY", std::to_string(h));
UpdateBitmap();
}