JavaEncoder_mspublic class JavaEncoder_ms extends JavaEncoder | MS GSM encoder plugin wrapper, which uses Java methods to do the encoding. |
| Fields Summary |
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| public static final String | a_copyright_notice
Licensed Materials - Property of IBM
"Restricted Materials of IBM"
5648-B81
(c) Copyright IBM Corporation 1997,1999 All Rights Reserved
US Government Users Restricted Rights - Use, duplication or
disclosure restricted by GSA ADP Schedule Contract with
IBM Corporation. |
| Constructors Summary |
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public JavaEncoder_ms()
////////////////////////////////////////////////////////////////////////////
// Methods
supportedInputFormats = new AudioFormat[] {
new AudioFormat(AudioFormat.LINEAR,
Format.NOT_SPECIFIED,
16,
1,
AudioFormat.LITTLE_ENDIAN,
AudioFormat.SIGNED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.byteArray
) };
defaultOutputFormats = new AudioFormat[] {new WavAudioFormat(AudioFormat.GSM_MS)};
PLUGIN_NAME="MS GSM Encoder";
historySize = 640;
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| Methods Summary |
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| protected int | calculateFramesNumber(int inputSize)
return inputSize / 640;
| | protected int | calculateOutputSize(int inputSize)
return calculateFramesNumber(inputSize) * 65 ;
| | protected boolean | codecProcess(byte[] inpData, int readPtr, byte[] outData, int writePtr, int inpLength, int[] readBytes, int[] writeBytes, int[] frameNumber, int[] regions, int[] regionsTypes)
int inCount = 0;
int outCount = 0;
int channels=inputFormat.getChannels();
boolean isStereo = ( channels == 2);
final int frames = inpLength/(640);
regions[0]=writePtr;
for (int frameCounter = 0; frameCounter<frames ; frameCounter++) {
encoder.gsm_encode_frame(inpData, readPtr , outData,writePtr);
readPtr += 640;
inCount += 640;
outCount += 65;
writePtr += 65;
regions [frameCounter+1]= outCount + writePtr;
regionsTypes[frameCounter ]= 0;
// System.out.println(inCount+" "+outCount+" "+inpLength);
}
readBytes [0]=inCount;
writeBytes[0]=outCount;
frameNumber[0]=frames;
return true;
| | protected javax.media.Format[] | getMatchingOutputFormats(javax.media.Format in)
AudioFormat af =(AudioFormat) in;
supportedOutputFormats = new AudioFormat[] {
new WavAudioFormat(
AudioFormat.GSM_MS,
af.getSampleRate(),
0,
af.getChannels(),
65*8,
(int) (af.getSampleRate() * af.getChannels() / 320 * 65),
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.NOT_SPECIFIED,
Format.byteArray,
new byte[] { (byte)0x40, (byte)0x01}
)
};
return supportedOutputFormats;
| | public void | open()
encoder=new GsmEncoder_ms();
encoder.gsm_encoder_reset();
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