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/**********
This library is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the
Free Software Foundation; either version 2.1 of the License, or (at your
option) any later version. (See <http://www.gnu.org/copyleft/lesser.html>.)
This library 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 Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with this library; if not, write to the Free Software Foundation, Inc.,
59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
**********/
// "liveMedia"
// Copyright (c) 1996-2004 Live Networks, Inc. All rights reserved.
// A source that consists of multiple byte-stream files, read sequentially
// Implementation
#include "ByteStreamMultiFileSource.hh"
ByteStreamMultiFileSource
::ByteStreamMultiFileSource(UsageEnvironment& env, char const** fileNameArray,
unsigned preferredFrameSize, unsigned playTimePerFrame)
: FramedSource(env),
fPreferredFrameSize(preferredFrameSize), fPlayTimePerFrame(playTimePerFrame),
fCurrentlyReadSourceNumber(0), fHaveStartedNewFile(False) {
// Begin by counting the number of sources:
for (fNumSources = 0; ; ++fNumSources) {
if (fileNameArray[fNumSources] == NULL) break;
}
// Next, copy the source file names into our own array:
fFileNameArray = new char const*[fNumSources];
if (fFileNameArray == NULL) return;
unsigned i;
for (i = 0; i < fNumSources; ++i) {
fFileNameArray[i] = strDup(fileNameArray[i]);
}
// Next, set up our array of component ByteStreamFileSources
// Don't actually create these yet; instead, do this on demand
fSourceArray = new ByteStreamFileSource*[fNumSources];
if (fSourceArray == NULL) return;
for (i = 0; i < fNumSources; ++i) {
fSourceArray[i] = NULL;
}
}
ByteStreamMultiFileSource::~ByteStreamMultiFileSource() {
unsigned i;
for (i = 0; i < fNumSources; ++i) {
Medium::close(fSourceArray[i]);
}
delete[] fSourceArray;
for (i = 0; i < fNumSources; ++i) {
delete[] (char*)(fFileNameArray[i]);
}
delete[] fFileNameArray;
}
ByteStreamMultiFileSource* ByteStreamMultiFileSource
::createNew(UsageEnvironment& env, char const** fileNameArray,
unsigned preferredFrameSize, unsigned playTimePerFrame) {
ByteStreamMultiFileSource* newSource
= new ByteStreamMultiFileSource(env, fileNameArray,
preferredFrameSize, playTimePerFrame);
return newSource;
}
void ByteStreamMultiFileSource::doGetNextFrame() {
do {
// First, check whether we've run out of sources:
if (fCurrentlyReadSourceNumber >= fNumSources) break;
fHaveStartedNewFile = False;
ByteStreamFileSource*& source
= fSourceArray[fCurrentlyReadSourceNumber];
if (source == NULL) {
// The current source hasn't been created yet. Do this now:
source = ByteStreamFileSource::createNew(envir(),
fFileNameArray[fCurrentlyReadSourceNumber],
fPreferredFrameSize, fPlayTimePerFrame);
if (source == NULL) break;
fHaveStartedNewFile = True;
}
// (Attempt to) read from the current source.
source->getNextFrame(fTo, fMaxSize,
afterGettingFrame, this,
onSourceClosure, this);
return;
} while (0);
// An error occurred; consider ourselves closed:
handleClosure(this);
}
void ByteStreamMultiFileSource
::afterGettingFrame(void* clientData,
unsigned frameSize, unsigned numTruncatedBytes,
struct timeval presentationTime,
unsigned durationInMicroseconds) {
ByteStreamMultiFileSource* source
= (ByteStreamMultiFileSource*)clientData;
source->fFrameSize = frameSize;
source->fNumTruncatedBytes = numTruncatedBytes;
source->fPresentationTime = presentationTime;
source->fDurationInMicroseconds = durationInMicroseconds;
FramedSource::afterGetting(source);
}
void ByteStreamMultiFileSource::onSourceClosure(void* clientData) {
ByteStreamMultiFileSource* source
= (ByteStreamMultiFileSource*)clientData;
source->onSourceClosure1();
}
void ByteStreamMultiFileSource::onSourceClosure1() {
// This routine was called because the currently-read source was closed
// (probably due to EOF). Close this source down, and move to the
// next one:
ByteStreamFileSource*& source
= fSourceArray[fCurrentlyReadSourceNumber++];
Medium::close(source);
source = NULL;
// Try reading again:
doGetNextFrame();
}
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