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info.cpp    103 lines (86 with data), 2.3 kB

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// Copyright (C) 2008-2011 David Sugar, Tycho Softworks.
//
// This file is part of GNU Bayonne.
//
// GNU Bayonne 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 3 of the License, or
// (at your option) any later version.
//
// GNU Bayonne 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 GNU Bayonne. If not, see <http://www.gnu.org/licenses/>.
#include <bayonne-config.h>
#include <ucommon/ucommon.h>
#include <ucommon/export.h>
#include <bayonne.h>
using namespace BAYONNE_NAMESPACE;
using namespace UCOMMON_NAMESPACE;
Audio::Info::Info()
{
clear();
}
void Audio::Info::clear(void)
{
memset(this, 0, sizeof(Info));
}
void Audio::Info::setRate(rate_t r)
{
rate = getRate(encoding, r);
set();
}
void Audio::Info::setFraming(timeout_t timeout)
{
set();
framing = getFraming(encoding);
if(!timeout)
return;
if(framing) {
timeout = (timeout / framing);
if(!timeout)
timeout = framing;
else
timeout = timeout * framing;
}
switch(timeout) {
case 10:
case 15:
case 20:
case 30:
case 40:
break;
default:
timeout = 20;
}
framing = timeout;
framecount = (rate * framing) / 1000l;
framesize = (unsigned)toBytes(encoding, framecount);
}
void Audio::Info::set(void)
{
switch(encoding) {
case mp1Audio:
framecount = 384;
framesize = (12 * bitrate / rate) * 4 + headersize + padding;
return;
case mp2Audio:
case mp3Audio:
framecount = 1152;
framesize = (144 * bitrate / rate) + headersize + padding;
return;
default:
break;
}
if(!framesize)
framesize = getFrame(encoding);
if(!framecount)
framecount = getCount(encoding);
if(!rate)
rate = getRate(encoding);
if(!bitrate && rate && framesize && framecount)
bitrate = ((long)framesize * 8l * rate) / (long)framecount;
}