Aegisub/aegisub/libmedia/subtitle/csri.cpp

147 lines
4.4 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/
//
// $Id$
/// @file subtitles_provider_csri.cpp
/// @brief Wrapper for CSRI-based subtitle renderers
/// @ingroup subtitle_rendering
///
#include "config.h"
#ifdef WITH_CSRI
#include "ass_file.h"
#include "subtitles_provider_csri.h"
#include "text_file_writer.h"
#include "video_context.h"
#include "video_frame.h"
/// @brief Constructor
/// @param type
///
CSRISubtitlesProvider::CSRISubtitlesProvider(std::string type) : subType(type) {
}
/// @brief Destructor
///
CSRISubtitlesProvider::~CSRISubtitlesProvider() {
if (!tempfile.empty()) wxRemoveFile(tempfile);
}
/// @brief Load subtitles
/// @param subs
///
void CSRISubtitlesProvider::LoadSubtitles(AssFile *subs) {
// CSRI variables
csri_rend *cur,*renderer=NULL;
// Select renderer
bool canOpenMem = true;
for (cur = csri_renderer_default();cur;cur=csri_renderer_next(cur)) {
std::string name(csri_renderer_info(cur)->name);
if (name == subType) {
renderer = cur;
if (name.find("vsfilter") != name.npos) canOpenMem = false;
break;
}
}
// Matching renderer not found, fallback to default
if (!renderer) {
renderer = csri_renderer_default();
if (!renderer) {
throw _T("No CSRI renderer available, cannot show subtitles. Try installing one or switch to another subtitle provider.");
}
}
// Open from memory
if (canOpenMem) {
std::vector<char> data;
subs->SaveMemory(data,wxSTRING_ENCODING);
instance.reset(csri_open_mem(renderer,&data[0],data.size(),NULL), &csri_close);
}
// Open from disk
else {
if (tempfile.empty()) {
tempfile = wxFileName::CreateTempFileName(_T("aegisub"));
wxRemoveFile(tempfile);
tempfile += L".ass";
}
subs->Save(tempfile,false,false,wxSTRING_ENCODING);
instance.reset(csri_open_file(renderer,tempfile.utf8_str(),NULL), &csri_close);
}
}
/// @brief Draw subtitles
/// @param dst
/// @param time
/// @return
///
void CSRISubtitlesProvider::DrawSubtitles(AegiVideoFrame &dst,double time) {
// Check if CSRI loaded properly
if (!instance.get()) return;
// Load data into frame
csri_frame frame;
if (dst.flipped) {
frame.planes[0] = dst.data + (dst.h-1) * dst.pitch;
frame.strides[0] = -(signed)dst.pitch;
}
else {
frame.planes[0] = dst.data;
frame.strides[0] = dst.pitch;
}
frame.pixfmt = CSRI_F_BGR_;
// Set format
csri_fmt format;
format.width = dst.w;
format.height = dst.h;
format.pixfmt = frame.pixfmt;
int error = csri_request_fmt(instance.get(),&format);
if (error) return;
// Render
csri_render(instance.get(),&frame,time);
}
/// @brief Get CSRI subtypes
///
std::vector<std::string> CSRISubtitlesProvider::GetSubTypes() {
std::vector<std::string> final;
for (csri_rend *cur = csri_renderer_default();cur;cur = csri_renderer_next(cur)) {
final.push_back(csri_renderer_info(cur)->name);
}
return final;
}
#endif // WITH_CSRI