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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.
// AMR Audio File sinks
// Implementation
#include "AMRAudioFileSink.hh"
#include "AMRAudioSource.hh"
#include "OutputFile.hh"
////////// AMRAudioFileSink //////////
AMRAudioFileSink
::AMRAudioFileSink(UsageEnvironment& env, FILE* fid, unsigned bufferSize,
char const* perFrameFileNamePrefix)
: FileSink(env, fid, bufferSize, perFrameFileNamePrefix),
fHaveWrittenHeader(False) {
}
AMRAudioFileSink::~AMRAudioFileSink() {
}
AMRAudioFileSink*
AMRAudioFileSink::createNew(UsageEnvironment& env, char const* fileName,
unsigned bufferSize, Boolean oneFilePerFrame) {
AMRAudioFileSink* newSink = NULL;
do {
FILE* fid;
char const* perFrameFileNamePrefix;
if (oneFilePerFrame) {
// Create the fid for each frame
fid = NULL;
perFrameFileNamePrefix = fileName;
} else {
// Normal case: create the fid once
fid = OpenOutputFile(env, fileName);
if (fid == NULL) break;
perFrameFileNamePrefix = NULL;
}
newSink = new AMRAudioFileSink(env, fid, bufferSize, perFrameFileNamePrefix);
if (newSink == NULL) break;
return newSink;
} while (0);
delete newSink;
return NULL;
}
Boolean AMRAudioFileSink::sourceIsCompatibleWithUs(MediaSource& source) {
// The input source must be a AMR Audio source:
return source.isAMRAudioSource();
}
void AMRAudioFileSink::afterGettingFrame1(unsigned frameSize,
struct timeval presentationTime) {
AMRAudioSource* source = (AMRAudioSource*)fSource;
if (!fHaveWrittenHeader && fPerFrameFileNameBuffer == NULL) {
// Output the appropriate AMR header to the start of the file.
// This header is defined in RFC 3267, section 5.
// (However, we don't do this if we're creating one file per frame.)
char headerBuffer[100];
sprintf(headerBuffer, "#!AMR%s%s\n",
source->isWideband() ? "-WB" : "",
source->numChannels() > 1 ? "_MC1.0" : "");
unsigned headerLength = strlen(headerBuffer);
if (source->numChannels() > 1) {
// Also add a 32-bit channel description field:
headerBuffer[headerLength++] = 0;
headerBuffer[headerLength++] = 0;
headerBuffer[headerLength++] = 0;
headerBuffer[headerLength++] = source->numChannels();
}
addData((unsigned char*)headerBuffer, headerLength, presentationTime);
}
fHaveWrittenHeader = True;
// Add the 1-byte header, before writing the file data proper:
// (Again, we don't do this if we're creating one file per frame.)
if (fPerFrameFileNameBuffer == NULL) {
u_int8_t frameHeader = source->lastFrameHeader();
addData(&frameHeader, 1, presentationTime);
}
// Call the parent class to complete the normal file write with the input data:
FileSink::afterGettingFrame1(frameSize, presentationTime);
}
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