/*
* @(#)ACMCodec.java 1.18 99/07/16
*/
package com.ibm.media.codec.audio;
import java.util.*;
import java.io.*;
import javax.media.*;
import javax.media.format.*;
import javax.media.format.*;
import com.sun.media.format.*;
import com.sun.media.util.*;
public class ACMCodec implements Codec, DynamicPlugIn {
/**
* Holds the supported input formats
*/
private Vector supportedInputFormats = null;
/**
* Holds the supported output formats
*/
private Vector supportedOutputFormats = null;
/**
* The actual input formats array to be returned
*/
private AudioFormat[] inputFormats = null;
/**
* The actual output formats array to be returned
*/
private AudioFormat[] outputFormats = null;
/**
* The input format for the codec
*/
private AudioFormat inputFormat = null;
/**
* The output format for the codec
*/
private AudioFormat outputFormat = null;
/**
* This hold the native handle for this instance's ACM codec
*/
private long nativeHandle;
static {
com.sun.media.JMFSecurityManager.loadLibrary("jmacm");
}
/**
* Obtain the collection of objects that
* control the object that implements this interface.
* <p>
*
* If no controls are supported, a zero length
* array is returned.
*
* @return the collection of object controls
*/
public Object[] getControls() {
// no controls implemented
return new Control[0];
}
/**
* Obtain the object that implements the specified
* <code>Class</code> or <code>Interface</code>
* The full class or interface name must be used.
* <p>
*
* If the control is not supported then <code>null</code>
* is returned.
*
* @return the object that implements the control,
* or <code>null</code>.
*/
public Object getControl(String controlType) {
// no controls implemented
return null;
}
/**
* Returns a descriptive name for the plug-in.
* This is a user readable string.
*/
public String getName() {
return "ACM Wrapper Codec";
}
/**
* Opens the plug-in software or hardware component and acquires
* necessary resources. If all the needed resources could not be
* acquired, it throws a ResourceUnavailableException. Buffer should not
* be passed into the plug-in without first calling this method.
*/
public void open() throws ResourceUnavailableException {
nativeHandle = openACMStream(inputFormat, outputFormat);
if (nativeHandle == 0)
throw new ResourceUnavailableException("ACM stream coun't been opened");
}
/**
* Opens an ACM stream to be used for transcoding
*
* @param inputFormat the input format for this codec
* @param outputFormat the ourpur format for this codec
* @return the native handle of the ACM codec or 0 if codec couldn't be open
*/
private native long openACMStream(AudioFormat inputFormat,
AudioFormat outputFormat);
/**
* Closes the plug-in component and releases resources. No more data
* will be accepted by the plug-in after a call to this method. The
* plug-in can be reinstated after being closed by calling
* <code>open</code>.
*/
public void close() {
closeACMStream(nativeHandle);
}
/**
* Closes the ACM stream used for transcoding.
*
* @param nativeHandle the native handle of the ACM codec
*/
private native void closeACMStream(long nativeHandle);
/**
* Resets the state of the plug-in. Typically at end of media or when media
* is repositioned.
*/
public void reset() {
resetACMStream(nativeHandle);
}
/**
* Resets the ACM stream.
*
* @param nativeHandle the native handle of the ACM codec
*/
private native void resetACMStream(long nativeHandle);
/**
* Lists the possible input formats supported by this plug-in.
*/
public Format[] getSupportedInputFormats() {
if (inputFormats != null)
return inputFormats;
else {
supportedInputFormats = new Vector();
fillSupportedInputFormats();
int size = supportedInputFormats.size();
inputFormats = new AudioFormat[size];
for (int index = 0; index < size; index++) {
inputFormats[index] = (AudioFormat)supportedInputFormats.elementAt(index);
}
return inputFormats;
}
}
/**
* Fills the supportedInputFormat Vector with the ACM supported input
* formats.
*/
private native void fillSupportedInputFormats();
/**
* Lists the possible output formats of the processed data.
* If <code>input</code> is non-null, then it lists the possible
* output formats given that the input buffer is of the format specified
* by <code>input</code>. If <code>input</code> is null, then it lists
* all possible output formats that this plug-in advertises.
*/
public Format[] getSupportedOutputFormats(Format input) {
if (input == null) {
outputFormats= new AudioFormat[1];
outputFormats[0] = new AudioFormat(null);
return outputFormats;
}
if (!(input instanceof AudioFormat)) {
outputFormats = new AudioFormat[0];
return outputFormats;
}
else {
/* fillSuppotedFormats(input) is called since each call to
getSupportedOutputFoprmats(input) can have a different
parameter and we wouldn't like to hold all supported formats
for all input possibilites ahead (will be a huge overhead */
supportedOutputFormats = new Vector();
fillSupportedOutputFormats((AudioFormat)input);
int size = supportedOutputFormats.size();
outputFormats = new AudioFormat[size];
for (int index = 0; index < size; index++)
outputFormats[index] = (AudioFormat)supportedOutputFormats.elementAt(index);
return outputFormats;
}
}
/**
* Fills the supportedOutputFormat Vector with the ACM supported output
* formats.
*/
private native void fillSupportedOutputFormats(AudioFormat input);
/**
* Set the buffer input format.
*
* @return false if the format is not supported.
*/
public Format setInputFormat(Format format) {
if (!(format instanceof AudioFormat)) {
return null;
}
inputFormat = (AudioFormat)format;
return format;
}
/**
* Set the buffer output format.
*
* @return false if the format is not supported.
*/
public Format setOutputFormat(Format format) {
if (!(format instanceof AudioFormat))
return null;
outputFormat = (AudioFormat)format;
return format;
}
/**
* Process the media
*
* @return BUFFER_PROCESSED_OK if the processing is successful. Other
* possible return codes are defined in PlugIn.
* @see PlugIn
*/
public int process(Buffer input, Buffer output) {
// shouldn't it be done in the module ?
if (input.isEOM()) {
output.setLength(0) ;
output.setEOM(true);
return BUFFER_PROCESSED_OK;
}
int oldInputOffset = input.getOffset();
// preper destination data
int destLength = getDestinationBufferSize(nativeHandle, input.getLength());
if (output.getData() == null ||
destLength > ((byte[])output.getData()).length) {
byte[] destination = new byte[destLength];
output.setData(destination);
}
output.setLength(destLength);
output.setOffset(0);
output.setFormat(outputFormat);
if (!ACMProcess(nativeHandle, (byte[])input.getData(), input.getOffset(),
input.getLength(), input, (byte[])output.getData(),
output.getLength(), output))
return BUFFER_PROCESSED_FAILED;
if (oldInputOffset != input.getOffset())
return BUFFER_PROCESSED_OK | INPUT_BUFFER_NOT_CONSUMED;
else
return BUFFER_PROCESSED_OK;
}
/**
* Gets the estimated size of the destination data.
*
* @param nativeHandle the native handle of the ACM codec
* @param inputSize the size of the input data
*
* @return the size of the destination data
*/
private native int getDestinationBufferSize(long nativeHandle, int input);
/**
* Does the ACM codec processing
*
* @param nativeHandle the native handle of the ACM codec
* @param input the input data
* @param inputLength the length of the input data
* @param inputBuffer the input Buffer object, passed for offset update
* @param output the output data
* @param outputLength the length of the output data
* @param outputBuffer the output Buffer object, passed for length update
*
* @return false if an error has occur
*/
private native boolean ACMProcess(long nativeHandle, byte[] input,
int inputOffset, int inputLength,
Buffer inputBuffer, byte[] output,
int outputLength, Buffer outputBuffer);
/**
* An array of format objects that cover the generic input formats
* that this plugin supports. For example, a VideoRenderer may not
* know the exact RGBFormat it supports, so it returns a dummy RGBFormat
* with mostly unspecified values.
*/
public Format[] getBaseInputFormats() {
Format[] formats = new Format[1];
formats[0] = new AudioFormat(null);
return formats;
}
/**
* An array of format objects that cover the generic output formats
* that this plugin supports. For example, a Codec may not
* know the exact output RGBFormat it supports, so it returns a dummy
* RGBFormat with mostly unspecified values.
*/
public Format[] getBaseOutputFormats() {
return getBaseInputFormats();
}
}
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