DubSource.cpp
资源名称:VC++视频传输.rar [点击查看]
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上传日期:2010-03-30
资源大小:8328k
文件大小:2k
源码类别:
VC书籍
开发平台:
Visual C++
- // 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() {
- }