Aegisub/avisynth_prs/draw_prs.cpp

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// Copyright (c) 2006, 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
//
// Website: http://aegisub.cellosoft.com
// Contact: mailto:zeratul@cellosoft.com
//
///////////
// Headers
#include "draw_prs.h"
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#include "../prs/prs.h"
///////////////
// Constructor
DrawPRS::DrawPRS (IScriptEnvironment* _env, PClip _child, const char *filename)
: GenericVideoFilter(_child)
{
// Set environment
env = _env;
// Load file
try {
file.Load(filename);
}
// Catch exception
catch (const std::exception &e) {
env->ThrowError("Error in PRS loading: %s",e.what());
}
catch (...) {
env->ThrowError("Unhandled exception in PRS loading.");
}
}
//////////////
// Destructor
DrawPRS::~DrawPRS() {
}
/////////////
// Get frame
PVideoFrame __stdcall DrawPRS::GetFrame(int n, IScriptEnvironment* env) {
// Avisynth frame
PVideoFrame avsFrame = child->GetFrame(n,env);
try {
// Check if there is anything to be drawn
if (file.HasDataAtFrame(n)) {
// Create the PRSFrame structure
env->MakeWritable(&avsFrame);
PRSVideoFrame frame;
frame.data[0] = (char*) avsFrame->GetWritePtr();
frame.w = avsFrame->GetRowSize()/4;
frame.h = avsFrame->GetHeight();
frame.pitch = avsFrame->GetPitch();
frame.flipColors = true;
frame.flipVertical = true;
// Set colorspace
VideoInfo vi = child->GetVideoInfo();
if (vi.IsYV12()) frame.colorSpace = ColorSpace_YV12;
else if (vi.IsYUY2()) frame.colorSpace = ColorSpace_YUY2;
else if (vi.IsRGB32()) frame.colorSpace = ColorSpace_RGB32;
else if (vi.IsRGB24()) frame.colorSpace = ColorSpace_RGB24;
// Draw into the frame
file.DrawFrame(n,&frame);
}
}
// Catch exception
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catch (const std::exception &e) {
env->ThrowError(e.what());
}
// Return frame
return avsFrame;
}
//////////////////////////////
// Actually create the filter
// This is the function that created the filter, when the filter has been called.
AVSValue __cdecl CreateDrawPRS(AVSValue args, void* user_data, IScriptEnvironment* env) {
return new DrawPRS(env, args[0].AsClip(), args[1].AsString());
}
/////////////////////////
// Avisynth registration
// The following function is the function that actually registers the filter in AviSynth
// It is called automatically, when the plugin is loaded to see which functions this filter contains.
extern "C" __declspec(dllexport) const char* __stdcall AvisynthPluginInit2(IScriptEnvironment* env) {
env->AddFunction("DrawPRS", "c[file]s", CreateDrawPRS, 0);
return "`Pre-Rendered Subtitles' by Rodrigo Braz Monteiro (ArchMage ZeratuL)";
}