Aegisub/aegisub/vendor/csri/frontends/avisynth25/avisynth.cpp

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/*****************************************************************************
* asa: portable digital subtitle renderer
*****************************************************************************
* Copyright (C) 2006 David Lamparter
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
****************************************************************************/
#include <windows.h>
#include "avisynth.h"
#include <stdio.h>
#include <csri/csri.h>
class CSRIAviSynth : public GenericVideoFilter {
csri_inst *inst;
double spf;
public:
CSRIAviSynth(PClip _child, IScriptEnvironment *env, const char *file,
const char *rendname, const char *rendver);
~CSRIAviSynth();
enum csri_pixfmt GetPixfmt();
PVideoFrame __stdcall GetFrame(int n, IScriptEnvironment *env);
static AVSValue __cdecl Create(AVSValue args, void* user_data,
IScriptEnvironment* env);
};
CSRIAviSynth::CSRIAviSynth(PClip _child, IScriptEnvironment *env,
const char *file, const char *rendname, const char *rendver)
: GenericVideoFilter(_child)
{
csri_rend *r = csri_renderer_byname(rendname, rendver);
if (!r) {
if (rendver)
env->ThrowError("Failed to load renderer \"%s\""
" version \"%s\"", rendname, rendver);
else if (rendname)
env->ThrowError("Failed to load renderer \"%s\"",
rendname);
else
env->ThrowError("Failed to load default renderer");
}
struct csri_fmt fmt;
fmt.pixfmt = GetPixfmt();
if (fmt.pixfmt == -1)
env->ThrowError("Pixel format not supported by "
"AviSynth interface");
inst = csri_open_file(r, file, NULL);
if (!inst)
env->ThrowError("Failed to load \"%s\"", file);
fmt.width = vi.width;
fmt.height = vi.height;
if (csri_request_fmt(inst, &fmt)) {
csri_close(inst);
env->ThrowError("Selected pixel format or size not supported "
"by selected subtitle renderer", file);
}
spf = (double)vi.fps_denominator / (double)vi.fps_numerator;
}
CSRIAviSynth::~CSRIAviSynth()
{
csri_close(inst);
}
enum csri_pixfmt CSRIAviSynth::GetPixfmt()
{
switch (vi.pixel_type) {
case VideoInfo::CS_BGR24: return CSRI_F_BGR;
case VideoInfo::CS_BGR32: return CSRI_F_BGR_;
case VideoInfo::CS_YUY2: return CSRI_F_YUY2;
case VideoInfo::CS_YV12: return CSRI_F_YV12;
}
return (enum csri_pixfmt)-1;
}
PVideoFrame __stdcall CSRIAviSynth::GetFrame(int n, IScriptEnvironment *env)
{
PVideoFrame avsframe = child->GetFrame(n, env);
struct csri_frame frame;
env->MakeWritable(&avsframe);
frame.pixfmt = GetPixfmt();
frame.planes[0] = avsframe->GetWritePtr();
frame.strides[0] = avsframe->GetPitch();
if (csri_is_yuv_planar(frame.pixfmt)) {
frame.planes[1] = avsframe->GetWritePtr(PLANAR_U);
frame.strides[1] = avsframe->GetPitch(PLANAR_U);
frame.planes[2] = avsframe->GetWritePtr(PLANAR_V);
frame.strides[2] = avsframe->GetPitch(PLANAR_V);
}
if (csri_is_rgb(frame.pixfmt)) {
frame.planes[0] += (vi.height - 1) * frame.strides[0];
frame.strides[0] = -frame.strides[0];
}
csri_render(inst, &frame, n * spf);
return avsframe;
}
AVSValue __cdecl CSRIAviSynth::Create(AVSValue args, void* user_data,
IScriptEnvironment* env)
{
const char *rname = args.ArraySize() >= 2 ? args[2].AsString() : NULL,
*rver = args.ArraySize() >= 3 ? args[3].AsString() : NULL;
return new CSRIAviSynth(args[0].AsClip(), env, args[1].AsString(),
rname, rver);
}
extern "C" __declspec(dllexport) const char* __stdcall AvisynthPluginInit2(
IScriptEnvironment* env)
{
static char avs_name_f[2048];
const char *avs_cmdname = (const char *)csri_query_ext(NULL,
"csri.avisynth25.command_name");
const char *avs_name = (const char *)csri_query_ext(NULL,
"csri.avisynth25.name");
if (!csri_renderer_default())
return NULL;
if (!avs_cmdname)
avs_cmdname = "CSRI";
if (!avs_name)
avs_name = "Common Subtitle Renderer Interface";
env->AddFunction(avs_cmdname, "cs", CSRIAviSynth::Create, 0);
env->AddFunction(avs_cmdname, "css", CSRIAviSynth::Create, 0);
env->AddFunction(avs_cmdname, "csss", CSRIAviSynth::Create, 0);
snprintf(avs_name_f, sizeof(avs_name_f),
"%s [AviSynth 2.5 front-end]", avs_name);
return avs_name_f;
}