212 lines
7.9 KiB
C#
212 lines
7.9 KiB
C#
//============================================================================
|
|
// 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
|
|
//=============================================================================
|
|
|
|
#undef DEBUG
|
|
|
|
using System;
|
|
using System.Collections.Generic;
|
|
using System.Text;
|
|
|
|
namespace BDInfo
|
|
{
|
|
public abstract class TSCodecMPEG2
|
|
{
|
|
public static void Scan(
|
|
TSVideoStream stream,
|
|
TSStreamBuffer buffer,
|
|
ref string tag)
|
|
{
|
|
int parse = 0;
|
|
int pictureParse = 0;
|
|
int sequenceHeaderParse = 0;
|
|
int extensionParse = 0;
|
|
int sequenceExtensionParse = 0;
|
|
|
|
for (int i = 0; i < buffer.Length; i++)
|
|
{
|
|
parse = (parse << 8) + buffer.ReadByte();
|
|
|
|
if (parse == 0x00000100)
|
|
{
|
|
pictureParse = 2;
|
|
}
|
|
else if (parse == 0x000001B3)
|
|
{
|
|
sequenceHeaderParse = 7;
|
|
}
|
|
else if (sequenceHeaderParse > 0)
|
|
{
|
|
--sequenceHeaderParse;
|
|
switch (sequenceHeaderParse)
|
|
{
|
|
#if DEBUG
|
|
case 6:
|
|
break;
|
|
|
|
case 5:
|
|
break;
|
|
|
|
case 4:
|
|
stream.Width =
|
|
(int)((parse & 0xFFF000) >> 12);
|
|
stream.Height =
|
|
(int)(parse & 0xFFF);
|
|
break;
|
|
|
|
case 3:
|
|
stream.AspectRatio =
|
|
(TSAspectRatio)((parse & 0xF0) >> 4);
|
|
|
|
switch ((parse & 0xF0) >> 4)
|
|
{
|
|
case 0: // Forbidden
|
|
break;
|
|
case 1: // Square
|
|
break;
|
|
case 2: // 4:3
|
|
break;
|
|
case 3: // 16:9
|
|
break;
|
|
case 4: // 2.21:1
|
|
break;
|
|
default: // Reserved
|
|
break;
|
|
}
|
|
|
|
switch (parse & 0xF)
|
|
{
|
|
case 0: // Forbidden
|
|
break;
|
|
case 1: // 23.976
|
|
stream.FrameRateEnumerator = 24000;
|
|
stream.FrameRateDenominator = 1001;
|
|
break;
|
|
case 2: // 24
|
|
stream.FrameRateEnumerator = 24000;
|
|
stream.FrameRateDenominator = 1000;
|
|
break;
|
|
case 3: // 25
|
|
stream.FrameRateEnumerator = 25000;
|
|
stream.FrameRateDenominator = 1000;
|
|
break;
|
|
case 4: // 29.97
|
|
stream.FrameRateEnumerator = 30000;
|
|
stream.FrameRateDenominator = 1001;
|
|
break;
|
|
case 5: // 30
|
|
stream.FrameRateEnumerator = 30000;
|
|
stream.FrameRateDenominator = 1000;
|
|
break;
|
|
case 6: // 50
|
|
stream.FrameRateEnumerator = 50000;
|
|
stream.FrameRateDenominator = 1000;
|
|
break;
|
|
case 7: // 59.94
|
|
stream.FrameRateEnumerator = 60000;
|
|
stream.FrameRateDenominator = 1001;
|
|
break;
|
|
case 8: // 60
|
|
stream.FrameRateEnumerator = 60000;
|
|
stream.FrameRateDenominator = 1000;
|
|
break;
|
|
default: // Reserved
|
|
stream.FrameRateEnumerator = 0;
|
|
stream.FrameRateDenominator = 0;
|
|
break;
|
|
}
|
|
break;
|
|
|
|
case 2:
|
|
break;
|
|
|
|
case 1:
|
|
break;
|
|
#endif
|
|
|
|
case 0:
|
|
#if DEBUG
|
|
stream.BitRate =
|
|
(((parse & 0xFFFFC0) >> 6) * 200);
|
|
#endif
|
|
stream.IsVBR = true;
|
|
stream.IsInitialized = true;
|
|
break;
|
|
}
|
|
}
|
|
else if (pictureParse > 0)
|
|
{
|
|
--pictureParse;
|
|
if (pictureParse == 0)
|
|
{
|
|
switch ((parse & 0x38) >> 3)
|
|
{
|
|
case 1:
|
|
tag = "I";
|
|
break;
|
|
case 2:
|
|
tag = "P";
|
|
break;
|
|
case 3:
|
|
tag = "B";
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (stream.IsInitialized) return;
|
|
}
|
|
}
|
|
else if (parse == 0x000001B5)
|
|
{
|
|
extensionParse = 1;
|
|
}
|
|
else if (extensionParse > 0)
|
|
{
|
|
--extensionParse;
|
|
if (extensionParse == 0)
|
|
{
|
|
if ((parse & 0xF0) == 0x10)
|
|
{
|
|
sequenceExtensionParse = 1;
|
|
}
|
|
}
|
|
}
|
|
else if (sequenceExtensionParse > 0)
|
|
{
|
|
--sequenceExtensionParse;
|
|
#if DEBUG
|
|
if (sequenceExtensionParse == 0)
|
|
{
|
|
uint sequenceExtension =
|
|
((parse & 0x8) >> 3);
|
|
if (sequenceExtension == 0)
|
|
{
|
|
stream.IsInterlaced = true;
|
|
}
|
|
else
|
|
{
|
|
stream.IsInterlaced = false;
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|