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package com.ibm.media.codec.audio;

import javax.media.*;
import javax.media.format.*;

import com.sun.media.*;

public abstract class AudioCodec extends BasicCodec
{
    protected String PLUGIN_NAME;
    protected AudioFormat defaultOutputFormats[];
    protected AudioFormat supportedInputFormats[];
    protected AudioFormat supportedOutputFormats[];
    protected AudioFormat inputFormat;
    protected AudioFormat outputFormat;
    protected final boolean DEBUG = true;

    /**
     * Checks the header of the compressed audio packet and detects any format
     * changes. Does not modify the buffer in any way. TBD: how to select
     * specific output format
     */
    @Override
    public boolean checkFormat(Format format)
    {
        return true;
    }

    @Override
    protected Format getInputFormat()
    {
        return inputFormat;
    }

    protected Format[] getMatchingOutputFormats(Format in)
    {
        return new Format[0];
    }

    public String getName()
    {
        return PLUGIN_NAME;
    }

    @Override
    protected Format getOutputFormat()
    {
        return outputFormat;
    }

    @Override
    public Format[] getSupportedInputFormats()
    {
        return supportedInputFormats;
    }

    public Format[] getSupportedOutputFormats(Format in)
    {
        // null input format
        if (in == null)
        {
            return defaultOutputFormats;
        }

        // mismatch input format
        if (!(in instanceof AudioFormat)
                || (matches(in, supportedInputFormats) == null))
        {
            return new Format[0];

        }

        // match input format
        return getMatchingOutputFormats(in);

    }

    @Override
    public Format setInputFormat(Format format)
    {
        if (!(format instanceof AudioFormat)
                || (null == matches(format, supportedInputFormats)))
            return null;

        inputFormat = (AudioFormat) format;
        return format;
    }

    @Override
    public Format setOutputFormat(Format format)
    {
        // This methods assumes setInputFormat has already been called.

        if (!(format instanceof AudioFormat)
                || (null == matches(format,
                        getMatchingOutputFormats(inputFormat))))
            return null;

        outputFormat = (AudioFormat) format;

        return format;
    }
}