Aegisub/src/video_controller.cpp

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// Copyright (c) 2005-2007, 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/
#include "video_controller.h"
#include "ass_dialogue.h"
#include "ass_file.h"
#include "audio_controller.h"
#include "compat.h"
#include "include/aegisub/context.h"
#include "options.h"
#include "project.h"
#include "selection_controller.h"
#include "time_range.h"
#include "async_video_provider.h"
#include "utils.h"
#include <libaegisub/ass/time.h>
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#include <wx/log.h>
VideoController::VideoController(agi::Context *c)
: context(c)
, playAudioOnStep(OPT_GET("Audio/Plays When Stepping Video"))
, connections(agi::signal::make_vector({
context->ass->AddCommitListener(&VideoController::OnSubtitlesCommit, this),
context->project->AddVideoProviderListener(&VideoController::OnNewVideoProvider, this),
context->selectionController->AddActiveLineListener(&VideoController::OnActiveLineChanged, this),
}))
{
Bind(EVT_VIDEO_ERROR, &VideoController::OnVideoError, this);
Bind(EVT_SUBTITLES_ERROR, &VideoController::OnSubtitlesError, this);
playback.Bind(wxEVT_TIMER, &VideoController::OnPlayTimer, this);
}
void VideoController::OnNewVideoProvider(AsyncVideoProvider *new_provider) {
Stop();
provider = new_provider;
color_matrix = provider ? provider->GetColorSpace() : "";
}
void VideoController::OnSubtitlesCommit(int type, const AssDialogue *changed) {
if (!provider) return;
if ((type & AssFile::COMMIT_SCRIPTINFO) || type == AssFile::COMMIT_NEW) {
auto new_matrix = context->ass->GetScriptInfo("YCbCr Matrix");
if (!new_matrix.empty() && new_matrix != color_matrix) {
color_matrix = new_matrix;
provider->SetColorSpace(new_matrix);
}
}
if (!changed)
provider->LoadSubtitles(context->ass.get());
else
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provider->UpdateSubtitles(context->ass.get(), changed);
}
void VideoController::OnActiveLineChanged(AssDialogue *line) {
if (line && provider && OPT_GET("Video/Subtitle Sync")->GetBool()) {
Stop();
JumpToTime(line->Start);
}
}
void VideoController::RequestFrame() {
context->ass->Properties.video_position = frame_n;
provider->RequestFrame(frame_n, TimeAtFrame(frame_n));
}
void VideoController::JumpToFrame(int n) {
if (!provider) return;
bool was_playing = IsPlaying();
if (was_playing)
Stop();
frame_n = mid(0, n, provider->GetFrameCount() - 1);
RequestFrame();
Seek(frame_n);
if (was_playing)
Play();
}
void VideoController::JumpToTime(int ms, agi::vfr::Time end) {
JumpToFrame(FrameAtTime(ms, end));
}
void VideoController::NextFrame() {
if (!provider || IsPlaying() || frame_n == provider->GetFrameCount())
return;
JumpToFrame(frame_n + 1);
if (playAudioOnStep->GetBool())
context->audioController->PlayRange(TimeRange(TimeAtFrame(frame_n - 1), TimeAtFrame(frame_n)));
}
void VideoController::PrevFrame() {
if (!provider || IsPlaying() || frame_n == 0)
return;
JumpToFrame(frame_n - 1);
if (playAudioOnStep->GetBool())
context->audioController->PlayRange(TimeRange(TimeAtFrame(frame_n), TimeAtFrame(frame_n + 1)));
}
void VideoController::Play() {
if (IsPlaying()) {
Stop();
return;
}
if (!provider) return;
start_ms = TimeAtFrame(frame_n);
end_frame = provider->GetFrameCount() - 1;
context->audioController->PlayToEnd(start_ms);
playback_start_time = std::chrono::steady_clock::now();
playback.Start(10);
}
void VideoController::PlayLine() {
Stop();
AssDialogue *curline = context->selectionController->GetActiveLine();
if (!curline) return;
context->audioController->PlayRange(TimeRange(curline->Start, curline->End));
// Round-trip conversion to convert start to exact
int startFrame = FrameAtTime(context->selectionController->GetActiveLine()->Start, agi::vfr::START);
start_ms = TimeAtFrame(startFrame);
end_frame = FrameAtTime(context->selectionController->GetActiveLine()->End, agi::vfr::END) + 1;
JumpToFrame(startFrame);
playback_start_time = std::chrono::steady_clock::now();
playback.Start(10);
}
void VideoController::Stop() {
if (IsPlaying()) {
playback.Stop();
context->audioController->Stop();
}
}
void VideoController::OnPlayTimer(wxTimerEvent &) {
using namespace std::chrono;
int next_frame = FrameAtTime(start_ms + duration_cast<milliseconds>(steady_clock::now() - playback_start_time).count());
if (next_frame == frame_n) return;
if (next_frame >= end_frame)
Stop();
else {
frame_n = next_frame;
RequestFrame();
Seek(frame_n);
}
}
double VideoController::GetARFromType(AspectRatio type) const {
switch (type) {
case AspectRatio::Default: return (double)provider->GetWidth()/provider->GetHeight();
case AspectRatio::Fullscreen: return 4.0/3.0;
case AspectRatio::Widescreen: return 16.0/9.0;
case AspectRatio::Cinematic: return 2.35;
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default: throw agi::InternalError("Bad AR type");
}
}
void VideoController::SetAspectRatio(double value) {
ar_type = AspectRatio::Custom;
ar_value = mid(.5, value, 5.);
context->ass->Properties.ar_mode = (int)ar_type;
context->ass->Properties.ar_value = ar_value;
ARChange(ar_type, ar_value);
}
void VideoController::SetAspectRatio(AspectRatio type) {
ar_value = mid(.5, GetARFromType(type), 5.);
ar_type = type;
context->ass->Properties.ar_mode = (int)ar_type;
context->ass->Properties.ar_value = ar_value;
ARChange(ar_type, ar_value);
}
int VideoController::TimeAtFrame(int frame, agi::vfr::Time type) const {
return context->project->Timecodes().TimeAtFrame(frame, type);
}
int VideoController::FrameAtTime(int time, agi::vfr::Time type) const {
return context->project->Timecodes().FrameAtTime(time, type);
}
void VideoController::OnVideoError(VideoProviderErrorEvent const& err) {
wxLogError(
"Failed seeking video. The video file may be corrupt or incomplete.\n"
"Error message reported: %s",
to_wx(err.GetMessage()));
}
void VideoController::OnSubtitlesError(SubtitlesProviderErrorEvent const& err) {
wxLogError(
"Failed rendering subtitles. Error message reported: %s",
to_wx(err.GetMessage()));
}