【VC开源代码栏目提醒】:本文主要为网学会员提供DubSource.cpp,希望对需要DubSource.cpp网友有所帮助,学习一下!
// VirtualDub - Video processing and capture application
// Copyright (C) 1998-2001 Avery Lee
//
// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
#include "DubSource.h"
DubSource::DubSource() {
format = NULL;
}
DubSource::~DubSource() {
if (format) delete format;
}
BOOL DubSource::init() {
return TRUE;
}
void *DubSource::allocFormat(int format_len) {
if (format) delete format;
return format = (void *)new char[this->format_len = format_len];
}
bool DubSource::isStreaming() {
return false;
}
int DubSource::read(LONG lStart, LONG lCount, LPVOID lpBuffer, LONG cbBuffer, LONG *lBytesRead, LONG *lSamplesRead) {
if (lStart < lSampleFirst) return AVIERR_BADPARAM;
if (lStart >= lSampleLast) {
if (lSamplesRead)
*lSamplesRead = 0;
if (lBytesRead)
*lBytesRead = 0;
return 0;
}
if (lCount>0 && lCount > lSampleLast - lStart) lCount = lSampleLast - lStart;
return _read(lStart, lCount, lpBuffer, cbBuffer, lBytesRead, lSamplesRead);
}
BOOL DubSource::isKey(LONG lSample) {
if (lSample<lSampleFirst || lSample>=lSampleLast) return TRUE;
return _isKey(lSample);
}
BOOL DubSource::_isKey(LONG lSample) {
return TRUE;
}
LONG DubSource::nearestKey(LONG lSample) {
return lSample;
}
LONG DubSource::prevKey(LONG lSample) {
return lSample <= lSampleFirst ? -1 : lSample-1;
}
LONG DubSource::nextKey(LONG lSample) {
return lSample+1 >= lSampleFirst ? -1 : lSample+1;
}
void DubSource::streamBegin(bool fRealTime) {
}
void DubSource::streamEnd() {
}
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