Aegisub/aegisub/src/video_provider_avs.cpp

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// Copyright (c) 2006, Fredrik Mellbin
// 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 video_provider_avs.cpp
/// @brief Avisynth-based video provider
/// @ingroup video_input
///
#include "config.h"
2008-01-22 03:54:16 +01:00
#ifdef WITH_AVISYNTH
#ifndef AGI_PRE
#include <wx/filename.h>
#include <wx/msw/registry.h>
#endif
#ifdef _WIN32
#include <vfw.h>
#endif
#include "charset_conv.h"
#include "compat.h"
#include <libaegisub/log.h>
#include "standard_paths.h"
#include "video_provider_avs.h"
AvisynthVideoProvider::AvisynthVideoProvider(wxString filename)
: last_fnum(-1)
{
iframe.flipped = true;
iframe.invertChannels = true;
wxMutexLocker lock(avs.GetMutex());
wxFileName fname(filename);
if (!fname.FileExists())
throw agi::FileNotFoundError(STD_STR(filename));
wxString extension = filename.Right(4).Lower();
#ifdef _WIN32
if (extension == ".avi") {
// Try to read the keyframes before actually opening the file as trying
// to open the file while it's already open can cause problems with
// badly written VFW decoders
AVIFileInit();
PAVIFILE pfile;
long hr = AVIFileOpen(&pfile, filename.wc_str(), OF_SHARE_DENY_WRITE, 0);
if (hr) {
warning = "Unable to open AVI file for reading keyframes:\n";
switch (hr) {
case AVIERR_BADFORMAT:
warning += "The file is corrupted, incomplete or has an otherwise bad format.";
break;
case AVIERR_MEMORY:
warning += "The file could not be opened because of insufficient memory.";
break;
case AVIERR_FILEREAD:
warning += "An error occurred reading the file. There might be a problem with the storage media.";
break;
case AVIERR_FILEOPEN:
warning += "The file could not be opened. It might be in use by another application, or you do not have permission to access it.";
break;
case REGDB_E_CLASSNOTREG:
warning += "There is no handler installed for the file extension. This might indicate a fundameltal problem in your Video for Windows installation, and can be caused by extremely stripped Windows installations.";
break;
default:
warning += "Unknown error.";
break;
}
goto file_exit;
}
PAVISTREAM ppavi;
if (hr = AVIFileGetStream(pfile, &ppavi, streamtypeVIDEO, 0)) {
warning = "Unable to open AVI video stream for reading keyframes:\n";
switch (hr) {
case AVIERR_NODATA:
warning += "The file does not contain a usable video stream.";
break;
case AVIERR_MEMORY:
warning += "Not enough memory.";
break;
default:
warning += "Unknown error.";
break;
}
goto file_release;
}
AVISTREAMINFO avis;
if (FAILED(AVIStreamInfo(ppavi,&avis,sizeof(avis)))) {
warning = "Unable to read keyframes from AVI file:\nCould not get stream information.";
goto stream_release;
}
bool all_keyframes = true;
for (size_t i = 0; i < avis.dwLength; i++) {
if (AVIStreamIsKeyFrame(ppavi, i))
KeyFrames.push_back(i);
else
all_keyframes = false;
}
// If every frame is a keyframe then just discard the keyframe data as it's useless
if (all_keyframes) KeyFrames.clear();
// Clean up
stream_release:
AVIStreamRelease(ppavi);
file_release:
AVIFileRelease(pfile);
file_exit:
AVIFileExit();
}
#endif
try {
AVSValue script = Open(fname, extension);
// Check if video was loaded properly
if (!script.IsClip() || !script.AsClip()->GetVideoInfo().HasVideo())
throw VideoNotSupported("No usable video found");
RGB32Video = (avs.GetEnv()->Invoke("Cache", avs.GetEnv()->Invoke("ConvertToRGB32", script))).AsClip();
vi = RGB32Video->GetVideoInfo();
fps = (double)vi.fps_numerator / vi.fps_denominator;
}
catch (AvisynthError const& err) {
throw VideoOpenError("Avisynth error: " + std::string(err.msg));
}
}
AvisynthVideoProvider::~AvisynthVideoProvider() {
iframe.Clear();
}
AVSValue AvisynthVideoProvider::Open(wxFileName const& fname, wxString const& extension) {
IScriptEnvironment *env = avs.GetEnv();
char *videoFilename = env->SaveString(fname.GetShortPath().mb_str(csConvLocal));
// Avisynth file, just import it
if (extension == ".avs") {
LOG_I("avisynth/video") << "Opening .avs file with Import";
decoderName = "Avisynth/Import";
return env->Invoke("Import", videoFilename);
}
// Open avi file with AviSource
if (extension == ".avi") {
LOG_I("avisynth/video") << "Opening .avi file with AviSource";
try {
const char *argnames[2] = { 0, "audio" };
AVSValue args[2] = { videoFilename, false };
decoderName = "Avisynth/AviSource";
return env->Invoke("AviSource", AVSValue(args,2), argnames);
}
// On Failure, fallback to DSS
catch (AvisynthError &err) {
LOG_E("avisynth/video") << err.msg;
LOG_I("avisynth/video") << "Failed to open .avi file with AviSource, trying DirectShowSource";
}
}
// Open d2v with mpeg2dec3
if (extension == ".d2v" && env->FunctionExists("Mpeg2Dec3_Mpeg2Source")) {
LOG_I("avisynth/video") << "Opening .d2v file with Mpeg2Dec3_Mpeg2Source";
AVSValue script = env->Invoke("Mpeg2Dec3_Mpeg2Source", videoFilename);
decoderName = "Avisynth/Mpeg2Dec3_Mpeg2Source";
//if avisynth is 2.5.7 beta 2 or newer old mpeg2decs will crash without this
if (env->FunctionExists("SetPlanarLegacyAlignment")) {
AVSValue args[2] = { script, true };
script = env->Invoke("SetPlanarLegacyAlignment", AVSValue(args,2));
}
return script;
}
// If that fails, try opening it with DGDecode
if (extension == ".d2v" && env->FunctionExists("DGDecode_Mpeg2Source")) {
LOG_I("avisynth/video") << "Opening .d2v file with DGDecode_Mpeg2Source";
decoderName = "DGDecode_Mpeg2Source";
return env->Invoke("Avisynth/Mpeg2Source", videoFilename);
//note that DGDecode will also have issues like if the version is too
// ancient but no sane person would use that anyway
}
if (extension == ".d2v" && env->FunctionExists("Mpeg2Source")) {
LOG_I("avisynth/video") << "Opening .d2v file with other Mpeg2Source";
AVSValue script = env->Invoke("Mpeg2Source", videoFilename);
decoderName = "Avisynth/Mpeg2Source";
//if avisynth is 2.5.7 beta 2 or newer old mpeg2decs will crash without this
if (env->FunctionExists("SetPlanarLegacyAlignment"))
script = env->Invoke("SetPlanarLegacyAlignment", script);
return script;
}
// Try loading DirectShowSource2
if (!env->FunctionExists("dss2")) {
wxFileName dss2path(StandardPaths::DecodePath("?data/avss.dll"));
if (dss2path.FileExists()) {
env->Invoke("LoadPlugin", env->SaveString(dss2path.GetFullPath().mb_str(csConvLocal)));
}
}
// If DSS2 loaded properly, try using it
if (env->FunctionExists("dss2")) {
LOG_I("avisynth/video") << "Opening file with DSS2";
decoderName = "Avisynth/DSS2";
return env->Invoke("DSS2", videoFilename);
}
// Try DirectShowSource
// Load DirectShowSource.dll from app dir if it exists
wxFileName dsspath(StandardPaths::DecodePath("?data/DirectShowSource.dll"));
if (dsspath.FileExists()) {
env->Invoke("LoadPlugin",env->SaveString(dsspath.GetFullPath().mb_str(csConvLocal)));
}
// Then try using DSS
if (env->FunctionExists("DirectShowSource")) {
const char *argnames[3] = { 0, "video", "audio" };
AVSValue args[3] = { videoFilename, true, false };
decoderName = "Avisynth/DirectShowSource";
warning = "Warning! The file is being opened using Avisynth's DirectShowSource, which has unreliable seeking. Frame numbers might not match the real number. PROCEED AT YOUR OWN RISK!";
LOG_I("avisynth/video") << "Opening file with DirectShowSource";
return env->Invoke("DirectShowSource", AVSValue(args,3), argnames);
}
// Failed to find a suitable function
LOG_E("avisynth/video") << "DSS function not found";
throw VideoNotSupported("No function suitable for opening the video found");
}
const AegiVideoFrame AvisynthVideoProvider::GetFrame(int n) {
if (n == last_fnum) return iframe;
wxMutexLocker lock(avs.GetMutex());
PVideoFrame frame = RGB32Video->GetFrame(n, avs.GetEnv());
iframe.pitch = frame->GetPitch();
iframe.w = frame->GetRowSize() / (vi.BitsPerPixel() / 8);
iframe.h = frame->GetHeight();
iframe.Allocate();
memcpy(iframe.data, frame->GetReadPtr(), iframe.pitch * iframe.h);
last_fnum = n;
return iframe;
}
#endif // HAVE_AVISYNTH