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(SND): audio from Macromedia Director casts.

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morkt 2023-09-07 12:08:16 +04:00
parent d396fd2394
commit 4aeec4f6a4
1 changed files with 112 additions and 0 deletions
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ArcFormats/Macromedia/AudioSND.cs Normal file
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//! \file AudioSND.cs
//! \date 2023 Aug 30
//! \brief Macromedia Director WAVE audio resource.
//
// Copyright (C) 2023 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;
namespace GameRes.Formats.Macromedia
{
[Export(typeof(AudioFormat))]
public class SndAudio : AudioFormat
{
public override string Tag { get => "SND"; }
public override string Description { get => "Macromedia Director audio resource"; }
public override uint Signature { get => 0; }
public override bool CanWrite { get => false; }
public override SoundInput TryOpen (IBinaryStream file)
{
if (!file.Name.HasExtension (".snd"))
return null;
int type = file.ReadUInt16();
if (type != 0x0200)
return null;
var reader = new Reader (file.AsStream, ByteOrder.BigEndian);
reader.Skip (2);
int count = reader.ReadU16();
if (0 == count)
return null;
int command = reader.ReadU16();
if (command != 0x8051)
return null;
reader.ReadI16();
int pos = reader.ReadI32();
if (pos != reader.Position)
return null;
ushort channels = 1;
ushort bps = 8;
reader.Skip (4);
int param = reader.ReadI32();
ushort sample_rate = reader.ReadU16();
reader.Skip (10);
byte encoding = reader.ReadU8();
byte freq = reader.ReadU8();
if (freq != 0x3C)
return null;
int frames_count = 0;
if (0 == encoding)
{
frames_count = param / channels;
}
else if (0xFF == encoding)
{
channels = (ushort)param;
frames_count = reader.ReadI32();
reader.Skip (22);
bps = reader.ReadU16();
reader.Skip (14);
}
else
throw new NotSupportedException (string.Format ("Not supported 'snd' encoding {0:X2}", encoding));
if (bps != 16 && bps != 8)
return null;
var format = new WaveFormat {
FormatTag = 1,
Channels = channels,
SamplesPerSecond = sample_rate,
BlockAlign = (ushort)(bps / 8),
BitsPerSample = bps,
};
format.SetBPS();
if (8 == bps)
{
var data = new StreamRegion (file.AsStream, file.Position);
return new RawPcmInput (data, format);
}
int sample_count = frames_count * channels;
var samples = file.ReadBytes (sample_count);
for (int i = 1; i < samples.Length; i += 2)
{
byte s = samples[i-1];
samples[i-1] = samples[i];
samples[i] = s;
}
var raw = new BinMemoryStream (samples);
file.Dispose();
return new RawPcmInput (raw, format);
}
}
}