GARbro-mirror/ArcFormats/Abogado/AudioADP.cs

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2016-10-29 06:01:31 +08:00
//! \file AudioADP.cs
//! \date Thu Oct 20 09:29:26 2016
//! \brief AbogadoPowers audio format.
//
// Copyright (C) 2016 by morkt
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
// IN THE SOFTWARE.
//
using System;
using System.ComponentModel.Composition;
using System.IO;
using GameRes.Utility;
namespace GameRes.Formats.Abogado
{
[Export(typeof(AudioFormat))]
public class AdpAudio : AudioFormat
{
public override string Tag { get { return "ADP"; } }
public override string Description { get { return "AbogadoPowers audio format"; } }
public override uint Signature { get { return 0; } }
public override bool CanWrite { get { return false; } }
public AdpAudio ()
{
Signatures = new uint[] { 0x5622, 0xAC44, 0 };
}
public override SoundInput TryOpen (IBinaryStream file)
{
var header = file.ReadHeader (0xC4);
uint sample_rate = header.ToUInt32 (0);
if (sample_rate < 8000 || sample_rate > 96000)
return null;
ushort channels = header.ToUInt16 (4);
if (channels != 1 && channels != 2)
return null;
int samples = header.ToInt32 (0xBC) * channels;
int start_pos = header.ToInt32 (0xC0);
if (samples <= 0 || start_pos >= file.Length)
return null;
var output = new byte[2 * samples];
var first = new AdpDecoder();
var second = first;
if (channels > 1)
second = new AdpDecoder();
file.Position = start_pos;
int dst = 0;
while (samples > 0)
{
byte v = file.ReadUInt8();
LittleEndian.Pack (first.DecodeSample (v >> 4), output, dst);
if (0 == --samples)
break;
dst += 2;
LittleEndian.Pack (second.DecodeSample (v), output, dst);
dst += 2;
--samples;
}
var format = new WaveFormat();
format.FormatTag = 1;
format.Channels = channels;
format.SamplesPerSecond = sample_rate;
format.AverageBytesPerSecond = 2u * channels * sample_rate;
format.BlockAlign = (ushort)(2 * channels);
format.BitsPerSample = 0x10;
var pcm = new MemoryStream (output);
var sound = new RawPcmInput (pcm, format);
file.Dispose();
return sound;
}
}
internal class AdpDecoder
{
int prev_sample = 0;
int quant_idx = 0;
public short DecodeSample (int sample)
{
sample &= 0xF;
var quant = QuantizeTable[quant_idx];
quant_idx += IncrementTable[sample];
if (quant_idx < 0)
quant_idx = 0;
else if (quant_idx > 0x58)
quant_idx = 0x58;
if (sample < 8)
{
sample = Math.Min (0x7FFF, prev_sample + (((2 * sample + 1) * quant) >> 3));
}
else
{
sample = Math.Max (-32768, prev_sample - ((2 * (sample & 7) + 1) * quant >> 3));
}
prev_sample = sample;
return (short)sample;
}
static readonly ushort[] QuantizeTable = {
0x0007, 0x0008, 0x0009, 0x000A, 0x000B, 0x000C, 0x000D, 0x000E,
0x0010, 0x0011, 0x0013, 0x0015, 0x0017, 0x0019, 0x001C, 0x001F,
0x0022, 0x0025, 0x0029, 0x002D, 0x0032, 0x0037, 0x003C, 0x0042,
0x0049, 0x0050, 0x0058, 0x0061, 0x006B, 0x0076, 0x0082, 0x008F,
0x009D, 0x00AD, 0x00BE, 0x00D1, 0x00E6, 0x00FD, 0x0117, 0x0133,
0x0151, 0x0173, 0x0198, 0x01C1, 0x01EE, 0x0220, 0x0256, 0x0292,
0x02D4, 0x031C, 0x036C, 0x03C3, 0x0424, 0x048E, 0x0502, 0x0583,
0x0610, 0x06AB, 0x0756, 0x0812, 0x08E0, 0x09C3, 0x0ABD, 0x0BD0,
0x0CFF, 0x0E4C, 0x0FBA, 0x114C, 0x1307, 0x14EE, 0x1706, 0x1954,
0x1BDC, 0x1EA5, 0x21B6, 0x2515, 0x28CA, 0x2CDF, 0x315B, 0x364B,
0x3BB9, 0x41B2, 0x4844, 0x4F7E, 0x5771, 0x602F, 0x69CE, 0x7462, 0x7FFF,
};
static int[] IncrementTable = { -1, -1, -1, -1, 2, 4, 6, 8, -1, -1, -1, -1, 2, 4, 6, 8 };
}
}