Michele Verità

dear all, please can someone give some helps on it..

rotate-buffer

> dear all, please can someone give some helps on it..

mic wrote:
> dear all, please can someone give some helps on it..

-- 
Stefan Tiedje------------x-------
--_____-----------|--------------
--(_|_ ----|-----|-----()-------
-- _|_)----|-----()--------------
----------()--------www.ccmix.com


For sure? This would make a big difference to me. What magnitude of 

Falk Grieffenhagen wrote:
> mxj is faster then peeking via uzi.

For sure?  This would make a big difference to me.  What magnitude of 
improvement are we talking about?

it seems make some mistake: i get this error when trying to compile hacked buf.op

/Library/Application Support/Cycling '74/java/classes/buf/Op.java[ 302 ] 'class' or 'interface' expected

public void copyFrom(String frombuf, long destoffset) {

/Library/Application Support/Cycling '74/java/classes/buf/Op.java[ 302 ] 'class' or 'interface' expected
        public void copyFrom(String frombuf, long destoffset) {


compilation of /Library/Application Support/Cycling '74/java/classes/buf/Op.java failed.

1 error
[ 23-feb-2007 16.35.13 ]
 compilation of /Library/Application Support/Cycling '74/java/classes/buf/Op.java failed.


anyway using only peek~ and % doesn't work properly since buffer is ruined when scrolled..tryin to play it sounds very bad with many clicks and hiccups

here is the altered source which works here in case something went 

* TODO support joint operations on more than one channel.

        declareInlets(new int[]{DataTypes.ALL});

        declareOutlets(new int[]{DataTypes.ALL});

            set(a[0].toString());

    public void merge(final Atom[] a) {

        MaxSystem.deferLow(new Executable() {

            public void execute() {

                long maxFrames = 0;

                int channelSum = 0;

                int[] channels = new int[a.length];

                long[] frames = new long[a.length];

                String[] name = new String[a.length];

                for (int i=0;i

                    name[i] = a[i].toString();

                    channels[i] = MSPBuffer.getChannels(name[i]);

                    channelSum+=channels[i];

                    frames[i] = MSPBuffer.getFrames(name[i]);

                    if (frames[i] > maxFrames)

                        maxFrames = frames[i];

                MSPBuffer.setFrames(bufname, channelSum, maxFrames);

                int count = 1;

                    for (int j=0;j

                        float[] data = MSPBuffer.peek(name[i], j+1);

                        MSPBuffer.poke(bufname, count++, data);

                    }

    public void split(final Atom[] a) {

                int channels = MSPBuffer.getChannels(bufname);

                if (a.length != channels) {

                    error("buf.Op: need " +channels+ " buffer name arguments "

                            +" to split "+bufname);

                    return;

                long chanSize = MSPBuffer.getSize(bufname)/channels;

                    String name = a[i].toString();

                    MSPBuffer.setSize(name, 1, chanSize);

                    MSPBuffer.poke(name, MSPBuffer.peek(bufname, i+1));

    public void equals(String thatbuf) {

        long size = MSPBuffer.getSize(bufname);

        if (size != MSPBuffer.getSize(thatbuf))

        else if (MSPBuffer.getChannels(bufname)

                    != MSPBuffer.getChannels(thatbuf))

            float[] thisData = MSPBuffer.peek(bufname);

            float[] thatData = MSPBuffer.peek(thatbuf);

            while ((equal)&&(index < size)) {

                if (thisData[index] != thatData[index])

                    equal = false;

            outlet(0, equal);

    public void copyFrom(final String frombuf) {

                long size = MSPBuffer.getSize(frombuf);

                int channels = MSPBuffer.getChannels(frombuf);

                MSPBuffer.setSize(bufname, channels, size);

                MSPBuffer.poke(bufname, MSPBuffer.peek(frombuf));

    public void copyInto(final String destbuf) {

                long size = MSPBuffer.getSize(bufname);

                MSPBuffer.setSize(destbuf, channels, size);

                MSPBuffer.poke(destbuf, MSPBuffer.peek(bufname));

    public void dataFrom(String frombuf) {

        dataMove(frombuf, bufname);

    public void dataInto(String tobuf) {

        dataMove(bufname, tobuf);

    private void dataMove(String frombuf, String tobuf)

        long size = Math.min(MSPBuffer.getSize(frombuf), MSPBuffer.getSize 

        int channels = Math.min(MSPBuffer.getChannels(frombuf), 

            MSPBuffer.poke(tobuf, c, 0, MSPBuffer.peek(frombuf, c, 0, size));

        float[] samps = MSPBuffer.peek(bufname, channel);

        float max = Float.MIN_VALUE;

            if (samps[i] > max) {

                max = samps[i];

                index = i;

        outlet(0, new Atom[] {Atom.newAtom(index), Atom.newAtom(max)});

        float min = Float.MAX_VALUE;

            if (samps[i] < min) {

                min = samps[i];

        outlet(0, new Atom[] {Atom.newAtom(index), Atom.newAtom(min)});

    public void removeDC(int channel) {

            total += samps[i];

        float shift = (float)(total/(double)samps.length);

            samps[i] -= shift;

        MSPBuffer.poke(bufname, channel, samps);

    public void normalize(int channel, float f) {

        double max = Double.MIN_VALUE;

            if (Math.abs(samps[i]) > max)

        double scale = ((double)Math.abs(f))/max;

            samps[i] *= scale;

    public void multiply(int channel, float f) {

        float factor = (float)Math.pow(10.0, f/20.);

        int chans = MSPBuffer.getChannels(bufname);

            multiply(i, factor);

    public void add(int channel, float f) {

    public void reverse(int channel) {

        float[] temp = new float[samps.length];

            temp[i] = samps[samps.length-i-1];

        MSPBuffer.poke(bufname, channel, temp);

    public void peek(int chan, long index) {

        outlet(0, MSPBuffer.peek(bufname, chan, index));

    public void poke(int chan, long index, float f) {

        MSPBuffer.poke(bufname, chan, index, f);

    public void pokeAll(int chan, float f) {

        float[] data = new float[(int)MSPBuffer.getSize(bufname)];

        MSPBuffer.poke(bufname, chan, data);

    public void stddev(int channel) {

        outlet(0, Math.sqrt(doVariance(channel)));

    public void variance(int channel) {

        outlet(0, doVariance(channel));

    private double doVariance(int channel) {

        double mean = total / (double)samps.length;

            total += Math.pow(samps[i]-mean,2.);

        return total/(double)(samps.length - 1);

    public void average(int channel) {

        outlet(0, total/(double)samps.length);

        outlet(0, MSPBuffer.getLength(bufname));

    public void setLength(int i, double d) {

        MSPBuffer.setLength(bufname, i, d);

        outlet(0, MSPBuffer.getSize(bufname));

    public void setSize(int channels, long size) {

        MSPBuffer.setSize(bufname, channels, size);

        outlet(0, MSPBuffer.getChannels(bufname));

    public void copyFrom(String frombuf, long destoffset) {

        copyFrom(frombuf, destoffset, 0);

    public void copyFrom(String frombuf, long destoffset, long srcoffset) {

        long length= MSPBuffer.getSize(frombuf);

        copyFrom(frombuf, destoffset, srcoffset, length-srcoffset);

    public void copyFrom(final String frombuf, final long destoffset, 

final long srcoffset, final long srcsize) {

        MaxSystem.deferLow(new Executable() {    

            public void execute() {    

                int channels= MSPBuffer.getChannels(frombuf);

                for(int i= 1; i

                    MSPBuffer.poke(bufname, i, destoffset, MSPBuffer.peek(frombuf, 

                outlet(0, "done");

> it seems make some mistake: i get this error when trying to compile 

> /Library/Application Support/Cycling '74/java/classes/buf/Op.java 

> [ 302 ] 'class' or 'interface' expected

> public void copyFrom(String frombuf, long destoffset) {

here is the altered source which works here in case something went  
wrong updating the source code:

package buf;
import com.cycling74.max.*;
import com.cycling74.msp.*;

/**
* a collection of buffer utilities
*
* created on Apr 12, 2004
* @author bbn
*
* TODO support joint operations on more than one channel.
* ie, DC offset
*
*/
public class Op extends MaxObject {

	Op(Atom[] a) {
		declareInlets(new int[]{DataTypes.ALL});
		declareOutlets(new int[]{DataTypes.ALL});
		createInfoOutlet(false);
		if (a.length>0)
			set(a[0].toString());
	}

	public void set(String s) {
		bufname = s;
	}

	public void merge(final Atom[] a) {
		MaxSystem.deferLow(new Executable() {
			public void execute() {
				long maxFrames = 0;
				int channelSum = 0;
				int[] channels = new int[a.length];
				long[] frames = new long[a.length];
				String[] name = new String[a.length];
				for (int i=0;i
					name[i] = a[i].toString();
					channels[i] = MSPBuffer.getChannels(name[i]);
					channelSum+=channels[i];
					frames[i] = MSPBuffer.getFrames(name[i]);
					if (frames[i] > maxFrames)
						maxFrames = frames[i];
				}
				MSPBuffer.setFrames(bufname, channelSum, maxFrames);
				int count = 1;
				for (int i=0;i
					for (int j=0;j
						float[] data = MSPBuffer.peek(name[i], j+1);
						MSPBuffer.poke(bufname, count++, data);
					}
				}
			}
		}
		);
	}

	public void split(final Atom[] a) {
		MaxSystem.deferLow(new Executable() {
			public void execute() {
				int channels = MSPBuffer.getChannels(bufname);
				if (a.length != channels) {
					error("buf.Op: need " +channels+ " buffer name arguments "
							+" to split "+bufname);
					return;
				}
				long chanSize = MSPBuffer.getSize(bufname)/channels;
				for (int i=0;i
					String name = a[i].toString();
					MSPBuffer.setSize(name, 1, chanSize);
					MSPBuffer.poke(name, MSPBuffer.peek(bufname, i+1));
				}
			}
		}
		);
	}

	public void equals(String thatbuf) {
		boolean equal = true;
		long size = MSPBuffer.getSize(bufname);
		if (size != MSPBuffer.getSize(thatbuf))
			equal = false;
		else if (MSPBuffer.getChannels(bufname)
					!= MSPBuffer.getChannels(thatbuf))
			equal = false;
		else {
			float[] thisData = MSPBuffer.peek(bufname);
			float[] thatData = MSPBuffer.peek(thatbuf);
			int index = 0;
			while ((equal)&&(index < size)) {
				if (thisData[index] != thatData[index])
					equal = false;
				index++;
			}
			outlet(0, equal);
		}
	}

	public void copyFrom(final String frombuf) {
		MaxSystem.deferLow(new Executable() {
			public void execute() {
				long size = MSPBuffer.getSize(frombuf);
				int channels = MSPBuffer.getChannels(frombuf);
				MSPBuffer.setSize(bufname, channels, size);
				MSPBuffer.poke(bufname, MSPBuffer.peek(frombuf));
			}
		}
		);
	}

	public void copyInto(final String destbuf) {
		MaxSystem.deferLow(new Executable() {
			public void execute() {
				long size = MSPBuffer.getSize(bufname);
				int channels = MSPBuffer.getChannels(bufname);
				MSPBuffer.setSize(destbuf, channels, size);
				MSPBuffer.poke(destbuf, MSPBuffer.peek(bufname));
			}
		}
		);
	}

	public void dataFrom(String frombuf) {
		dataMove(frombuf, bufname);
	}
	public void dataInto(String tobuf) {
		dataMove(bufname, tobuf);
	}

	private void dataMove(String frombuf, String tobuf)
	{
		long size = Math.min(MSPBuffer.getSize(frombuf), MSPBuffer.getSize 
(tobuf));
		int channels = Math.min(MSPBuffer.getChannels(frombuf),  
MSPBuffer.getChannels(tobuf));
		for (int c=0;c
		{
			MSPBuffer.poke(tobuf, c, 0, MSPBuffer.peek(frombuf, c, 0, size));
		}
	}

	public void max(int channel) {
		float[] samps = MSPBuffer.peek(bufname, channel);
		float max = Float.MIN_VALUE;
		int index = 0;
		for (int i=0;i
			if (samps[i] > max) {
				max = samps[i];
				index = i;
			}
		outlet(0, new Atom[] {Atom.newAtom(index), Atom.newAtom(max)});
	}

	public void min(int channel) {
		float[] samps = MSPBuffer.peek(bufname, channel);
		float min = Float.MAX_VALUE;
		int index = 0;
		for (int i=0;i
			if (samps[i] < min) {
				min = samps[i];
				index = i;
			}
		outlet(0, new Atom[] {Atom.newAtom(index), Atom.newAtom(min)});
	}

	public void removeDC(int channel) {
		float[] samps = MSPBuffer.peek(bufname, channel);
		double total = 0;
		for (int i=0;i
			total += samps[i];
		}
		float shift = (float)(total/(double)samps.length);
		for (int i=0;i
			samps[i] -= shift;
		MSPBuffer.poke(bufname, channel, samps);
	}

	public void normalize(int channel, float f) {
		float[] samps = MSPBuffer.peek(bufname, channel);
		double max = Double.MIN_VALUE;
		for (int i=0;i
			if (Math.abs(samps[i]) > max)
				max = samps[i];
		double scale = ((double)Math.abs(f))/max;
		for (int i=0;i
			samps[i] *= scale;
		MSPBuffer.poke(bufname, channel, samps);
	}

	public void multiply(int channel, float f) {
		float[] samps = MSPBuffer.peek(bufname, channel);
		for (int i=0;i
			samps[i] *= f;
		MSPBuffer.poke(bufname, channel, samps);
	}

	public void gain(float f) {
		float factor = (float)Math.pow(10.0, f/20.);
		int chans = MSPBuffer.getChannels(bufname);
		for (int i=1;i
			multiply(i, factor);
		}
	}

	public void add(int channel, float f) {
		float[] samps = MSPBuffer.peek(bufname, channel);
		for (int i=0;i
			samps[i] += f;
		MSPBuffer.poke(bufname, channel, samps);
	}

	public void reverse(int channel) {
		float[] samps = MSPBuffer.peek(bufname, channel);
		float[] temp = new float[samps.length];
		for (int i=0;i
			temp[i] = samps[samps.length-i-1];
		MSPBuffer.poke(bufname, channel, temp);
	}

	public void peek(int chan, long index) {
		outlet(0, MSPBuffer.peek(bufname, chan, index));
	}

	public void poke(int chan, long index, float f) {
		MSPBuffer.poke(bufname, chan, index, f);
	}

	public void pokeAll(int chan, float f) {
		float[] data = new float[(int)MSPBuffer.getSize(bufname)];
		for (int i=0;i
			data[i] = f;
		}
		MSPBuffer.poke(bufname, chan, data);
	}

	public void sum(int channel) {
		float[] samps = MSPBuffer.peek(bufname, channel);
		double total = 0;
		for (int i=0;i
			total += samps[i];
		}
		outlet(0, total);
	}

	public void stddev(int channel) {
		outlet(0, Math.sqrt(doVariance(channel)));
	}

	public void variance(int channel) {
		outlet(0, doVariance(channel));
	}

	private double doVariance(int channel) {
		float[] samps = MSPBuffer.peek(bufname, channel);
		double total = 0;
		for (int i=0;i
			total += samps[i];
		}
		double mean = total / (double)samps.length;
		total = 0;
		for (int i=0;i
			total += Math.pow(samps[i]-mean,2.);
		}
		return total/(double)(samps.length - 1);
	}

	public void average(int channel) {
		float[] samps = MSPBuffer.peek(bufname, channel);
		double total = 0;
		for (int i=0;i
			total += samps[i];
		}
		outlet(0, total/(double)samps.length);
	}

	public void mean(int channel) {
		average(channel);
	}

	public void getLength() {
		outlet(0, MSPBuffer.getLength(bufname));
	}

	public void setLength(int i, double d) {
		MSPBuffer.setLength(bufname, i, d);
	}

	public void getSize() {
		outlet(0, MSPBuffer.getSize(bufname));
	}

	public void setSize(int channels, long size) {
		MSPBuffer.setSize(bufname, channels, size);
	}

	public void getChannels() {
		outlet(0, MSPBuffer.getChannels(bufname));
	}
	//redFrik 050513, 051128, 060927
	public void copyFrom(String frombuf, long destoffset) {
		copyFrom(frombuf, destoffset, 0);
	}
	public void copyFrom(String frombuf, long destoffset, long srcoffset) {
		long length= MSPBuffer.getSize(frombuf);
		copyFrom(frombuf, destoffset, srcoffset,  length-srcoffset);
	}
	public void copyFrom(final String frombuf, final long destoffset,  
final long srcoffset, final long srcsize) {
		MaxSystem.deferLow(new Executable() {	
			public void execute() {	
				int channels= MSPBuffer.getChannels(frombuf);
				for(int i= 1; i
					MSPBuffer.poke(bufname, i, destoffset, MSPBuffer.peek(frombuf,  
i, srcoffset, srcsize));
				}
				outlet(0, "done");
			}
		});
	}
}

>
> it seems make some mistake: i get this error when trying to compile  
> hacked buf.op
>
> /Library/Application Support/Cycling '74/java/classes/buf/Op.java 
> [ 302 ] 'class' or 'interface' expected
>         public void copyFrom(String frombuf, long destoffset) {


rotate buffer