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//============================================================================
// BDInfo - Blu-ray Video and Audio Analysis Tool
// Copyright © 2010 Cinema Squid
//
// 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.
//
// 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
//=============================================================================
namespace BDInfo
{
public abstract class TSCodecLPCM
{
public static void Scan(
TSAudioStream stream,
TSStreamBuffer buffer,
ref string tag)
{
if (stream.IsInitialized) return;
byte[] header = buffer.ReadBytes(4);
int flags = (header[2] << 8) + header[3];
switch ((flags & 0xF000) >> 12)
{
case 1: // 1/0/0
stream.ChannelCount = 1;
stream.LFE = 0;
break;
case 3: // 2/0/0
stream.ChannelCount = 2;
stream.LFE = 0;
break;
case 4: // 3/0/0
stream.ChannelCount = 3;
stream.LFE = 0;
break;
case 5: // 2/1/0
stream.ChannelCount = 3;
stream.LFE = 0;
break;
case 6: // 3/1/0
stream.ChannelCount = 4;
stream.LFE = 0;
break;
case 7: // 2/2/0
stream.ChannelCount = 4;
stream.LFE = 0;
break;
case 8: // 3/2/0
stream.ChannelCount = 5;
stream.LFE = 0;
break;
case 9: // 3/2/1
stream.ChannelCount = 5;
stream.LFE = 1;
break;
case 10: // 3/4/0
stream.ChannelCount = 7;
stream.LFE = 0;
break;
case 11: // 3/4/1
stream.ChannelCount = 7;
stream.LFE = 1;
break;
default:
stream.ChannelCount = 0;
stream.LFE = 0;
break;
}
switch ((flags & 0xC0) >> 6)
{
case 1:
stream.BitDepth = 16;
break;
case 2:
stream.BitDepth = 20;
break;
case 3:
stream.BitDepth = 24;
break;
default:
stream.BitDepth = 0;
break;
}
switch ((flags & 0xF00) >> 8)
{
case 1:
stream.SampleRate = 48000;
break;
case 4:
stream.SampleRate = 96000;
break;
case 5:
stream.SampleRate = 192000;
break;
default:
stream.SampleRate = 0;
break;
}
stream.BitRate = (uint)
(stream.SampleRate * stream.BitDepth *
(stream.ChannelCount + stream.LFE));
stream.IsVBR = false;
stream.IsInitialized = true;
}
}
}
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