private void WriteSounds(SfxDefinition sfxDefinition)
{
_writer.WriteCode(Code.Normal, @"
** structure for audio
structure SoundStructure, 0
word SoundStartOffset_w ; Offset from the fx pack where to start sound
word SoundPeriod_w ;
word SoundLength_w
byte SoundVolume_b ; Audio volume
byte SoundUnused_b ;
label SOUND_STRUCTURE_SIZE
");
_writer.StartObject(ObjectType.Data, "sounds");
_writer.WriteWord(0); // So the first sound is not 0 which could mean no-sound
foreach (var soundTuple in sfxDefinition.Sounds)
{
var sound = soundTuple.Value;
_items.Add(ItemTypes.Sound, soundTuple.Key, _writer.GetCurrentOffset(ObjectType.Data));
var startOffset = (ushort)_waveOffsets[sound.Waveform];
var period = (ushort)(TicksPerSecond / sound.Frequency);
var length = (ushort)(_waveLengths[sound.Waveform] / 2);
_writer.WriteWord(startOffset);
_writer.WriteWord(period);
_writer.WriteWord(length);
_writer.WriteByte((byte)sound.Volume);
_writer.WriteByte(0);
}
_writer.EndObject();
}
private void Render(SfxDefinition sfxDefinition)
{
var inBuffer = new float [BufferSize];
var outBuffer = new byte[BufferSize];
WriteWaveFile(sfxDefinition, inBuffer, outBuffer);
WriteSounds(sfxDefinition);
}
private void WriteWaveFile(SfxDefinition sfxDefinition, float[] inBuffer, byte[] outBuffer)
{
var offset = 0;
var startOffset = 0;
_writer.StartObject(ObjectType.Audio, "sfx");
foreach (var wave in sfxDefinition.Waveforms)
{
using (var audioFile = new AudioFileReader(wave.Value.SoundFile.FromInputFolder()))
{
while (audioFile.HasData(BufferSize))
{
var sampleCount = audioFile.Read(inBuffer, 0, BufferSize);
if (sampleCount > 0)
{
for (var i = 0; i < BufferSize; i++)
{
outBuffer[i] = (byte)(127 * inBuffer[i]);
}
_writer.WriteBlob(outBuffer, sampleCount);
if (sampleCount % 2 != 0) // make wave ends on even bytes
{
sampleCount++;
_writer.WriteByte(0);
}
offset += sampleCount;
}
}
}
_waveOffsets.Add(wave.Key, startOffset);
_waveLengths.Add(wave.Key, offset - startOffset);
startOffset = offset;
}
_writer.EndObject();
}
