| public read ( byte buffer, int length, int bigendianp, int word, int sgned, int bitstream ) : int | ||
| buffer | byte | |
| length | int | |
| bigendianp | int | |
| word | int | |
| sgned | int | |
| bitstream | int | |
| return | int | |
public int read(byte[] buffer,int length,
int bigendianp, int word, int sgned, int[] bitstream)
{
int host_endian = host_is_big_endian();
int index=0;
while(true)
{
if(decode_ready)
{
float[][] pcm;
float[][][] _pcm=new float[1][][];
int[] _index=new int[getInfo(-1).channels];
int samples=vd.synthesis_pcmout(_pcm, _index);
pcm=_pcm[0];
if(samples!=0)
{
// yay! proceed to pack data into the byte buffer
int channels=getInfo(-1).channels;
int bytespersample=word * channels;
if(samples>length/bytespersample)samples=length/bytespersample;
// a tight loop to pack each size
{
int val;
if(word==1)
{
int off=(sgned!=0?0:128);
for(int j=0;j<samples;j++)
{
for(int i=0;i<channels;i++)
{
val=(int)(pcm[i][_index[i]+j]*128.0 + 0.5);
if(val>127)val=127;
else if(val<-128)val=-128;
buffer[index++]=(byte)(val+off);
}
}
}
else
{
int off=(sgned!=0?0:32768);
if(host_endian==bigendianp)
{
if(sgned!=0)
{
for(int i=0;i<channels;i++)
{ // It's faster in this order
int src=_index[i];
int dest=i*2;
for(int j=0;j<samples;j++)
{
val=(int)(pcm[i][src+j]*32767.0);
if(val>32767)val=32767;
else if(val<-32768)val=-32768;
buffer[dest]=(byte)(val);
buffer[dest+1]=(byte)((uint)val >> 8);
dest+=bytespersample;
}
}
}
else
{
for(int i=0;i<channels;i++)
{
float[] src=pcm[i];
int dest=i;
for(int j=0;j<samples;j++)
{
val=(int)(src[j]*32768.0 + 0.5);
if(val>32767)val=32767;
else if(val<-32768)val=-32768;
buffer[dest]=(byte)((uint)(val+off) >> 8);
buffer[dest+1]=(byte)(val+off);
dest+=channels*2;
}
}
}
}
else if(bigendianp!=0)
{
for(int j=0;j<samples;j++)
{
for(int i=0;i<channels;i++)
{
val=(int)(pcm[i][j]*32768.0 + 0.5);
if(val>32767)val=32767;
else if(val<-32768)val=-32768;
val+=off;
buffer[index++]=(byte)((uint)val >> 8);
buffer[index++]=(byte)val;
}
}
}
else
{
//int val;
for(int j=0;j<samples;j++)
{
for(int i=0;i<channels;i++)
{
val=(int)(pcm[i][j]*32768.0 + 0.5);
if(val>32767)val=32767;
else if(val<-32768)val=-32768;
val+=off;
buffer[index++]=(byte)val;
buffer[index++]=(byte)((uint)val >> 8);
}
}
}
}
}
vd.synthesis_read(samples);
pcm_offset+=samples;
if(bitstream!=null)bitstream[0]=current_link;
return(samples*bytespersample);
}
}
// suck in another packet
switch(process_packet(1))
{
case 0:
return(0);
case -1:
return -1;
default:
break;
}
}
return -1;
}
/// <summary>
/// Decodes the ogg-vorbis file
/// </summary>
/// <param name="input">Stream of the ogg-vorbis file</param>
/// <returns>PCM-Wave version of the input</returns>
public WaveFile Decode(Stream input)
{
MemoryStream output = new MemoryStream();
WaveFile wf = new WaveFile();
VorbisFile vf = new VorbisFile((FileStream)input, null, 0);
Info inf = vf.getInfo(-1);
wf.Channels = (short)inf.channels;
wf.Frequency = inf.rate;
wf.Bits = 16;
Axiom.Core.LogManager.Instance.Write("SoundSystem: File is Ogg Vorbis "+inf.version.ToString()+" "+inf.rate.ToString()+"Hz, "+inf.channels.ToString()+" channels");
int bufferlen = 4096;
int result = 1;
byte[] buffer = new byte[bufferlen];
int[] section = new int[1];
while(result != 0)
{
result = vf.read(buffer, bufferlen, 0, 2, 1, section);
output.Write(buffer, 0, result);
}
output.Seek(0, SeekOrigin.Begin);
wf.Data = output;
return wf;
}
