Aegisub/src/subtitles_provider_csri.cpp

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// 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 subtitles_provider_csri.cpp
/// @brief Wrapper for CSRI-based subtitle renderers
/// @ingroup subtitle_rendering
///
#ifdef WITH_CSRI
#include "subtitles_provider_csri.h"
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#include "include/aegisub/subtitles_provider.h"
#include "subtitle_format_ass.h"
#include "video_frame.h"
#include <libaegisub/make_unique.h>
#include <boost/interprocess/streams/vectorstream.hpp>
#include <mutex>
#ifdef WIN32
#define CSRIAPI
#endif
#include <csri/csri.h>
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namespace {
// CSRI renderers are not required to be thread safe (and VSFilter very much
// is not)
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std::mutex csri_mutex;
struct closer {
void operator()(csri_inst *inst) { if (inst) csri_close(inst); }
};
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class CSRISubtitlesProvider final : public SubtitlesProvider {
std::unique_ptr<csri_inst, closer> instance;
csri_rend *renderer = nullptr;
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boost::interprocess::basic_ovectorstream<std::vector<char>> ostr;
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public:
CSRISubtitlesProvider(std::string subType);
void LoadSubtitles(AssFile *subs, int time);
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void DrawSubtitles(VideoFrame &dst, double time);
};
CSRISubtitlesProvider::CSRISubtitlesProvider(std::string type) {
ostr.reserve(0x10000);
std::lock_guard<std::mutex> lock(csri_mutex);
for (csri_rend *cur = csri_renderer_default(); cur; cur = csri_renderer_next(cur)) {
if (type == csri_renderer_info(cur)->name) {
renderer = cur;
break;
}
}
if (!renderer)
throw agi::InternalError("CSRI renderer vanished between initial list and creation?", 0);
}
void CSRISubtitlesProvider::LoadSubtitles(AssFile *subs, int time) {
ostr.rdbuf()->clear();
AssSubtitleFormat::WriteToStream(subs, ostr, time);
std::lock_guard<std::mutex> lock(csri_mutex);
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instance.reset(csri_open_mem(renderer, ostr.vector().data(), ostr.vector().size(), nullptr));
}
void CSRISubtitlesProvider::DrawSubtitles(VideoFrame &dst, double time) {
if (!instance) return;
csri_frame frame;
if (dst.flipped) {
frame.planes[0] = dst.data.data() + (dst.height-1) * dst.width * 4;
frame.strides[0] = -(signed)dst.width * 4;
}
else {
frame.planes[0] = dst.data.data();
frame.strides[0] = dst.width * 4;
}
frame.pixfmt = CSRI_F_BGR_;
csri_fmt format = { frame.pixfmt, dst.width, dst.height };
std::lock_guard<std::mutex> lock(csri_mutex);
if (!csri_request_fmt(instance.get(), &format))
csri_render(instance.get(), &frame, time);
}
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}
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namespace csri {
std::vector<std::string> List() {
std::vector<std::string> final;
for (csri_rend *cur = csri_renderer_default(); cur; cur = csri_renderer_next(cur)) {
std::string name(csri_renderer_info(cur)->name);
if (name.find("aegisub") != name.npos)
final.insert(final.begin(), name);
else
final.push_back(name);
}
return final;
}
std::unique_ptr<SubtitlesProvider> Create(std::string const& name, agi::BackgroundRunner *) {
return agi::make_unique<CSRISubtitlesProvider>(name);
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}
}
#endif // WITH_CSRI