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124 lines
4.0 KiB
C#
124 lines
4.0 KiB
C#
//============================================================================
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// BDInfo - Blu-ray Video and Audio Analysis Tool
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// Copyright © 2010 Cinema Squid
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//=============================================================================
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namespace BDInfo
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{
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public abstract class TSCodecLPCM
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{
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public static void Scan(
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TSAudioStream stream,
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TSStreamBuffer buffer,
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ref string tag)
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{
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if (stream.IsInitialized) return;
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byte[] header = buffer.ReadBytes(4);
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int flags = (header[2] << 8) + header[3];
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switch ((flags & 0xF000) >> 12)
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{
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case 1: // 1/0/0
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stream.ChannelCount = 1;
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stream.LFE = 0;
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break;
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case 3: // 2/0/0
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stream.ChannelCount = 2;
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stream.LFE = 0;
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break;
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case 4: // 3/0/0
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stream.ChannelCount = 3;
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stream.LFE = 0;
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break;
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case 5: // 2/1/0
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stream.ChannelCount = 3;
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stream.LFE = 0;
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break;
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case 6: // 3/1/0
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stream.ChannelCount = 4;
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stream.LFE = 0;
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break;
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case 7: // 2/2/0
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stream.ChannelCount = 4;
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stream.LFE = 0;
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break;
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case 8: // 3/2/0
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stream.ChannelCount = 5;
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stream.LFE = 0;
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break;
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case 9: // 3/2/1
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stream.ChannelCount = 5;
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stream.LFE = 1;
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break;
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case 10: // 3/4/0
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stream.ChannelCount = 7;
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stream.LFE = 0;
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break;
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case 11: // 3/4/1
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stream.ChannelCount = 7;
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stream.LFE = 1;
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break;
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default:
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stream.ChannelCount = 0;
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stream.LFE = 0;
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break;
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}
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switch ((flags & 0xC0) >> 6)
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{
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case 1:
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stream.BitDepth = 16;
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break;
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case 2:
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stream.BitDepth = 20;
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break;
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case 3:
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stream.BitDepth = 24;
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break;
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default:
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stream.BitDepth = 0;
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break;
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}
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switch ((flags & 0xF00) >> 8)
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{
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case 1:
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stream.SampleRate = 48000;
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break;
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case 4:
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stream.SampleRate = 96000;
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break;
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case 5:
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stream.SampleRate = 192000;
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break;
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default:
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stream.SampleRate = 0;
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break;
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}
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stream.BitRate = (uint)
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(stream.SampleRate * stream.BitDepth *
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(stream.ChannelCount + stream.LFE));
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stream.IsVBR = false;
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stream.IsInitialized = true;
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}
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}
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}
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