| 6 |
|
{ |
| 7 |
|
internal class SoundData |
| 8 |
|
{ |
| 9 |
+ |
public bool IsIMA4; |
| 10 |
|
public int SampleRate; |
| 11 |
|
public int ChannelCount; |
| 12 |
|
public byte[] Data; |
| 13 |
|
|
| 14 |
< |
public static SoundData Read(InstanceDescriptor sndd) |
| 14 |
> |
public static SoundData Read(InstanceDescriptor sndd, bool do_pc_demo_test) |
| 15 |
|
{ |
| 16 |
|
if (sndd.Template.Tag != TemplateTag.SNDD) |
| 17 |
|
throw new ArgumentException("descriptor"); |
| 28 |
|
sound.ChannelCount = (reader.ReadInt32() >> 1) + 1; |
| 29 |
|
sound.SampleRate = 22050; |
| 30 |
|
reader.Skip(4); |
| 31 |
+ |
sound.IsIMA4 = true; |
| 32 |
|
} |
| 33 |
|
else |
| 34 |
|
{ |
| 35 |
< |
reader.Skip(6); |
| 35 |
> |
reader.Skip(6); // ADPCM format identifiers (change to support PCM?) |
| 36 |
|
sound.ChannelCount = reader.ReadInt16(); |
| 37 |
|
sound.SampleRate = reader.ReadInt32(); |
| 38 |
|
reader.Skip(44); |
| 39 |
+ |
sound.IsIMA4 = false; |
| 40 |
|
} |
| 41 |
|
|
| 42 |
|
dataSize = reader.ReadInt32(); |
| 46 |
|
using (var rawReader = sndd.GetRawReader(dataOffset)) |
| 47 |
|
sound.Data = rawReader.ReadBytes(dataSize); |
| 48 |
|
|
| 49 |
+ |
if (sound.IsIMA4 && do_pc_demo_test) // check if the raw data actually looks like IMA4 |
| 50 |
+ |
{ |
| 51 |
+ |
int nIMABlocks = sound.Data.Length / 34; |
| 52 |
+ |
int remainder = sound.Data.Length - nIMABlocks * 34; |
| 53 |
+ |
if (remainder == 0 && (nIMABlocks % sound.ChannelCount) == 0) |
| 54 |
+ |
{ |
| 55 |
+ |
bool stepIndexAbove88 = false; |
| 56 |
+ |
for (int ii = 0; ii < nIMABlocks; ii++) |
| 57 |
+ |
{ |
| 58 |
+ |
Byte cc = sound.Data[ii * 34 + 1]; |
| 59 |
+ |
if ((cc & 0x7F) > 88) |
| 60 |
+ |
stepIndexAbove88 = true; |
| 61 |
+ |
} |
| 62 |
+ |
if (stepIndexAbove88) |
| 63 |
+ |
sound.IsIMA4 = false; |
| 64 |
+ |
} |
| 65 |
+ |
else |
| 66 |
+ |
sound.IsIMA4 = false; |
| 67 |
+ |
if (!(sound.IsIMA4)) |
| 68 |
+ |
Console.WriteLine("PC-demo MS ADPCM detected; use -nodemo flag to treat as IMA4."); |
| 69 |
+ |
} |
| 70 |
+ |
|
| 71 |
|
return sound; |
| 72 |
|
} |
| 73 |
|
} |