/// <summary>
/// Looks up the records for the given id
/// </summary>
/// <param name="id">The id of the file, event, etc</param>
/// <returns>null if no information, otherwise, the record</returns>
object InfoFor(uint id)
{
// First, map the id to a string, if possible
object objId;
var name = AudioAssets.StringForID(id);
if (null != name)
{
objId = name.ToUpper();
}
else
{
objId = id;
}
// Try looking up the record
objectId2Info.TryGetValue(objId, out var ret);
return(ret);
}
/// <summary>
/// Add information about an id
/// </summary>
/// <param name="id">The internal 32-bit id form for events, sounds, etc.</param>
/// <param name="info">Arbitrary extra information associated with the </param>
void Add(uint id, object info)
{
// First, map the id to a string, if possible
object objId;
var name = AudioAssets.StringForID(id);
if (null != name)
{
objId = name.ToUpper();
}
else
{
objId = id;
}
// First, check that there is not already an ojbect in there with this
// information
if (objectId2Info.TryGetValue(objId, out _))
{
throw new System.Exception("dang, there should not be two.");
}
objectId2Info[objId] = info;
}
/// <summary>
/// This reads a event to event action mapping
/// </summary>
/// <param name="eventId">the ID of the event that maps to an action</param>
void ReadHIRCEvent(uint eventId, long endPos)
{
// Create a record so that we can look it up later
var eventActions = new List <uint>();
// Fetch each of event actions
var numObjects = binaryReader.ReadUInt32();
for (var idx = 0; idx < numObjects; idx++)
{
// Sanity check, since there is some weirdness with some files
if (binaryReader.BaseStream.Position + 4 > endPos)
{
break;
}
// Append the event action id to the list
// Note: I don't know how this action id is created, it doesn't seem
// to be in the various metadata text fieles
eventActions.Add(binaryReader.ReadUInt32());
}
// Look up the record
var info = (EventInfo)InfoFor(eventId);
if (null != info)
{
info.EventActions = eventActions;
}
else
{
// map the id to this info
var eventName = AudioAssets.StringForID(eventId);
Add(eventId, new EventInfo {
SoundBankName = soundBankName, Name = eventName ?? (object)eventId, EventActions = eventActions
});
}
}
/// <summary>
/// This reads a event to event action mapping
/// </summary>
/// <param name="eventId">the ID of the event that maps to an action</param>
/// <remarks>
/// The action Ids refer to objects created in the Event Action
/// </remarks>
void ReadHIRCEvent(uint eventId, long endPos)
{
// Create a record so that we can look it up later
var eventActions = new List <uint>();
// Fetch each of event actions
// Note: this is a byte, not a uint32 as reported elsewhere
var numObjects = binaryReader.ReadByte();
for (var idx = 0; idx < numObjects; idx++)
{
// Sanity check, since there is some weirdness with some files
if (binaryReader.BaseStream.Position + 4 > endPos)
{
break;
}
// Append the event action id to the list
eventActions.Add(binaryReader.ReadUInt32());
}
// Look up the record
var info = (EventInfo)InfoFor(eventId);
if (null != info)
{
info.EventActionIds = eventActions;
}
else
{
// map the id to this info
var eventName = AudioAssets.StringForID(eventId);
Add(eventId, new EventInfo {
SoundBank = this, Name = eventName ?? (object)eventId, EventActionIds = eventActions
});
}
}
/// <summary>
///
/// </summary>
/// <param name="buffer"></param>
/// <param name="offset"></param>
/// <param name="count"></param>
/// <returns></returns>
public int Read(byte[] buffer, int offset, int count)
{
WaveBuffer waveBuffer = new WaveBuffer(buffer);
var outIdx = 0;
var outBuf = waveBuffer.ShortBuffer;
if (null == reader)
{
return(0);
}
while (true)
{
// Do we need to replenish the bufer?
if (null == samples)
{
index = 0;
// Check that we haven't reached the end of the stream
// Todo: find a better way to capture the end of the line
if (reader.BaseStream.Position >= end)
{
reader.Dispose();
reader = null;
return(0);
}
// For each of the channels decode the samples and multiplex them in
var numChannels = WaveFormat.Channels;
// Get the decode sample buffer for the 1st channel
AudioAssets.Decode_wwise_ima(reader, chSamples);
if (1 == numChannels)
{
samples = chSamples;
}
else
{
// place it per the channels
var L = chSamples.Length;
for (var sampIdx = 0; sampIdx < L; sampIdx++)
{
dest[sampIdx * numChannels] = chSamples[sampIdx];
}
for (var ch = 1; ch < numChannels; ch++)
{
// Check that we haven't reached the end of the stream
// Todo: find a better way to capture the end of the line
if (reader.BaseStream.Position >= end)
{
reader.Dispose();
reader = null;
return(0);
}
// Get the decode sample buffer
AudioAssets.Decode_wwise_ima(reader, chSamples);
for (var sampIdx = 0; sampIdx < L; sampIdx++)
{
dest[sampIdx * numChannels + 1] = chSamples[sampIdx];
}
}
samples = dest;
}
}
// Copy the samples out
var len = samples.Length;
for (; count > 0 && index < len; index++, count -= 2)
{
outBuf[outIdx++] = samples[index];
}
// Have we consumed the whole buffer?
if (index >= samples.Length)
{
samples = null;
}
// Are we done?
if (count < 2)
{
return(outIdx * 2);
}
}
}
