122 lines
4.3 KiB
C++
122 lines
4.3 KiB
C++
// Copyright (c) 2005, Rodrigo Braz Monteiro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// Aegisub Project http://www.aegisub.org/
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//
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// $Id$
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/// @file vfw_wrap.cpp
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/// @brief Reading timecode and keyframe data from AVI files using Video for Windows
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/// @ingroup video_input
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///
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///////////
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// Headers
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#include "config.h"
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#include <vfw.h>
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#include "vfw_wrap.h"
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/// @brief Get keyframe list
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/// @param filename
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///
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wxArrayInt VFWWrapper::GetKeyFrames(wxString filename) {
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wxArrayInt frames;
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#ifdef __WINDOWS__
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// Init vfw
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AVIFileInit();
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// Open file
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PAVIFILE pfile;
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long hr = AVIFileOpen(&pfile, filename.wc_str(), OF_SHARE_DENY_WRITE, 0);
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if (hr != 0) {
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AVIFileExit();
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switch (hr) {
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case AVIERR_BADFORMAT:
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throw _T("Unable to open AVI file for reading keyframes:\nThe file is corrupted, incomplete or has an otherwise bad format.");
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case AVIERR_MEMORY:
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throw _T("Unable to open AVI file for reading keyframes:\nThe file could not be opened because of insufficient memory.");
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case AVIERR_FILEREAD:
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throw _T("Unable to open AVI file for reading keyframes:\nAn error occurred reading the file. There might be a problem with the storage media.");
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case AVIERR_FILEOPEN:
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throw _T("Unable to open AVI file for reading keyframes:\nThe file could not be opened. It might be in use by another application, or you do not have permission to access it.");
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case REGDB_E_CLASSNOTREG:
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throw _T("Unable to open AVI file for reading keyframes:\nThere 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.");
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default:
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throw _T("Unable to open AVI file for reading keyframes:\nUnknown error.");
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}
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}
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// Open stream
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PAVISTREAM ppavi;
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hr = AVIFileGetStream(pfile,&ppavi,streamtypeVIDEO,0);
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if (hr != 0) {
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AVIFileRelease(pfile);
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AVIFileExit();
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switch (hr) {
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case AVIERR_NODATA:
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throw _T("Unable to open AVI video stream for reading keyframes:\nThe file does not contain a usable video stream.");
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case AVIERR_MEMORY:
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throw _T("Unable to open AVI video stream for reading keyframes:\nNot enough memory.");
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default:
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throw _T("Unable to open AVI video stream for reading keyframes:\nUnknown error.");
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}
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}
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// Get stream data
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AVISTREAMINFO avis;
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hr = AVIStreamInfo(ppavi,&avis,sizeof(avis));
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if (hr != 0) {
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AVIStreamRelease(ppavi);
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AVIFileRelease(pfile);
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AVIFileExit();
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throw _T("Unable to read keyframes from AVI file:\nCould not get stream information.");
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}
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size_t frame_c = avis.dwLength;
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// Loop through stream
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for (size_t i=0;i<frame_c;i++) {
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if (AVIStreamIsKeyFrame(ppavi,(int)i)) {
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frames.Add(i);
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}
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}
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// Clean up
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AVIStreamRelease(ppavi);
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AVIFileRelease(pfile);
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AVIFileExit();
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#endif
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return frames;
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}
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