mirror of
https://github.com/DSheirer/sdrtrunk.git
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Initial commit of redesigned internal processing and audio management.
Note: Several of the decoders are currently non-functioning in this commit. If you want the latest functioning codebase, please checkout the commit prior to this one. All decoders will eventually be updated with this new architecture. Currently broken: - Logging and recording - Aux decoders (Fleetsync/MDC/LoJack/Tait) - LTR/Passport decoders Changes in this commit: - Module architecture for decoders and components with central provisioning by the DecoderFactory - Transition from Complex sample stream processing to float buffer processing for improved memory management - Redesigned filter structures - to support buffers and streams - Resolved several memory leak issues - Universal sharing of the thread pool manager - Added centralized audio management with call/user prioritization and new gui with mute/volume controls - Embedded audio metadata for eventual streaming support - Redesigned ProcessingChain to support independent re-use - Added new TrafficChannelManager to handle traffic channel allocations - Traffic Channel pool size and Call timeout available in P25 and MPT1327 configs - Redesigned channel and decoder gui components
This commit is contained in:
denny
244
src/module/decode/p25/message/ldu/LDU1Message.java
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src/module/decode/p25/message/ldu/LDU1Message.java
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package module.decode.p25.message.ldu;
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import module.decode.p25.reference.DataUnitID;
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import module.decode.p25.reference.LinkControlOpcode;
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import module.decode.p25.reference.Vendor;
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import module.decode.p25.reference.VendorLinkControlOpcode;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import alias.AliasList;
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import bits.BinaryMessage;
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import edac.CRC;
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import edac.Hamming10;
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import edac.ReedSolomon_63_47_17;
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public class LDU1Message extends LDUMessage
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{
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private final static Logger mLog = LoggerFactory.getLogger( LDU1Message.class );
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public static final int ENCRYPTION_FLAG = 352;
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public static final int IMPLICIT_VENDOR_FLAG = 353;
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public static final int[] OPCODE = { 354,355,356,357,362,363 };
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public static final int[] VENDOR = { 364,365,366,367,372,373,374,375 };
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public static final int[] GOLAY_WORD_STARTS = {
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352,362,372,382,536,546,556,566,720,730,740,750,904,914,924,934,1088,
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1098,1108,1118,1272,1282,1292,1302 };
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public static final int[] CW_HEX_0 = { 352,353,354,355,356,357 };
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public static final int[] CW_HEX_1 = { 362,363,364,365,366,367 };
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public static final int[] CW_HEX_2 = { 372,373,374,375,376,377 };
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public static final int[] CW_HEX_3 = { 382,383,384,385,386,387 };
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public static final int[] CW_HEX_4 = { 536,537,538,539,540,541 };
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public static final int[] CW_HEX_5 = { 546,547,548,549,550,551 };
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public static final int[] CW_HEX_6 = { 556,557,558,559,560,561 };
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public static final int[] CW_HEX_7 = { 566,567,568,569,570,571 };
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public static final int[] CW_HEX_8 = { 720,721,722,723,724,725 };
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public static final int[] CW_HEX_9 = { 730,731,732,733,734,735 };
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public static final int[] CW_HEX_10 = { 740,741,742,743,744,745 };
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public static final int[] CW_HEX_11 = { 750,751,752,753,754,755 };
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public static final int[] RS_HEX_0 = { 904,905,906,907,908,909 };
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public static final int[] RS_HEX_1 = { 914,915,916,917,918,919 };
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public static final int[] RS_HEX_2 = { 924,925,926,927,928,929 };
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public static final int[] RS_HEX_3 = { 934,935,936,937,938,939 };
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public static final int[] RS_HEX_4 = { 1088,1089,1090,1091,1092,1093 };
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public static final int[] RS_HEX_5 = { 1098,1099,1100,1101,1102,1103 };
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public static final int[] RS_HEX_6 = { 1108,1109,1110,1111,1112,1113 };
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public static final int[] RS_HEX_7 = { 1118,1119,1120,1121,1122,1123 };
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public static final int[] RS_HEX_8 = { 1272,1273,1274,1275,1276,1277 };
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public static final int[] RS_HEX_9 = { 1282,1283,1284,1285,1286,1287 };
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public static final int[] RS_HEX_10 = { 1292,1293,1294,1295,1296,1297 };
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public static final int[] RS_HEX_11 = { 1302,1303,1304,1305,1306,1307 };
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/* Reed-Solomon(24,12,13) code protects the link control word. Maximum
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* correctable errors are: Hamming Distance(13) / 2 = 6 */
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public static final ReedSolomon_63_47_17 mReedSolomonDecoder =
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new ReedSolomon_63_47_17( 6 );
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public LDU1Message( BinaryMessage message, DataUnitID duid,
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AliasList aliasList )
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{
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super( message, duid, aliasList );
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/* NID CRC is checked in the message framer, thus a constructed message
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* means it passed the CRC */
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mCRC = new CRC[ 3 ];
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mCRC[ 0 ] = CRC.PASSED;
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checkCRC();
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}
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/**
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* Subclass constructor from an existing LDU1Message
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*/
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protected LDU1Message( LDU1Message message )
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{
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super( message.getSourceMessage(), DataUnitID.LDU1, message.getAliasList() );
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mCRC = message.mCRC;
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}
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@Override
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public boolean isEncrypted()
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{
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return mMessage.get( ENCRYPTION_FLAG );
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}
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private void checkCRC()
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{
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mCRC[ 1 ] = CRC.PASSED;
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/* Hamming( 10,6,3 ) error detection and correction */
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for( int index: GOLAY_WORD_STARTS )
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{
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int errors = Hamming10.checkAndCorrect( mMessage, index );
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if( errors > 1 )
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{
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mCRC[ 1 ] = CRC.FAILED_CRC;
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}
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}
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/* Reed-Solomon( 24,16,9 ) error detection and correction
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* Check the Reed-Solomon parity bits. The RS decoder expects the code
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* words and reed solomon parity hex codewords in reverse order.
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*
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* Since this is a truncated RS(63) codes, we pad the code with zeros */
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int[] input = new int [63];
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int[] output = new int [63];
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input[ 0 ] = mMessage.getInt( RS_HEX_11 );
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input[ 1 ] = mMessage.getInt( RS_HEX_10 );
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input[ 2 ] = mMessage.getInt( RS_HEX_9 );
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input[ 3 ] = mMessage.getInt( RS_HEX_8 );
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input[ 4 ] = mMessage.getInt( RS_HEX_7 );
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input[ 5 ] = mMessage.getInt( RS_HEX_6 );
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input[ 6 ] = mMessage.getInt( RS_HEX_5 );
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input[ 7 ] = mMessage.getInt( RS_HEX_4 );
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input[ 8 ] = mMessage.getInt( RS_HEX_3 );
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input[ 9 ] = mMessage.getInt( RS_HEX_2 );
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input[ 10 ] = mMessage.getInt( RS_HEX_1 );
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input[ 11 ] = mMessage.getInt( RS_HEX_0 );
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input[ 12 ] = mMessage.getInt( CW_HEX_11 );
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input[ 13 ] = mMessage.getInt( CW_HEX_10 );
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input[ 14 ] = mMessage.getInt( CW_HEX_9 );
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input[ 15 ] = mMessage.getInt( CW_HEX_8 );
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input[ 16 ] = mMessage.getInt( CW_HEX_7 );
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input[ 17 ] = mMessage.getInt( CW_HEX_6 );
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input[ 18 ] = mMessage.getInt( CW_HEX_5 );
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input[ 19 ] = mMessage.getInt( CW_HEX_4 );
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input[ 20 ] = mMessage.getInt( CW_HEX_3 );
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input[ 21 ] = mMessage.getInt( CW_HEX_2 );
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input[ 22 ] = mMessage.getInt( CW_HEX_1 );
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input[ 23 ] = mMessage.getInt( CW_HEX_0 );
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/* indexes 24 - 62 are defaulted to zero */
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boolean irrecoverableErrors = mReedSolomonDecoder.decode( input, output );
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if( irrecoverableErrors )
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{
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mCRC[ 2 ] = CRC.FAILED_CRC;
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}
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else
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{
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/* Since we've detected that we can correct the RS words, mark the
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* hamming crc as corrected as well, if it is currently failed */
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if( mCRC[ 1 ] == CRC.FAILED_CRC )
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{
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mCRC[ 1 ] = CRC.CORRECTED;
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}
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mCRC[ 2 ] = CRC.PASSED;
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/* Only fix the codeword data hex codewords */
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repairHexCodeword( input, output, 12, CW_HEX_11 );
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repairHexCodeword( input, output, 13, CW_HEX_10 );
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repairHexCodeword( input, output, 14, CW_HEX_9 );
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repairHexCodeword( input, output, 15, CW_HEX_8 );
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repairHexCodeword( input, output, 16, CW_HEX_7 );
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repairHexCodeword( input, output, 17, CW_HEX_6 );
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repairHexCodeword( input, output, 18, CW_HEX_5 );
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repairHexCodeword( input, output, 19, CW_HEX_4 );
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repairHexCodeword( input, output, 20, CW_HEX_3 );
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repairHexCodeword( input, output, 21, CW_HEX_2 );
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repairHexCodeword( input, output, 22, CW_HEX_1 );
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repairHexCodeword( input, output, 23, CW_HEX_0 );
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}
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}
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private void repairHexCodeword( int[] input, int[] output, int index, int[] indexSet )
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{
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if( input[ index ] != output[ index ] )
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{
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mMessage.load( indexSet[ 0 ], 6, output[ index ] );
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mCRC[ 2 ] = CRC.CORRECTED;
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}
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}
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@Override
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public String getMessage()
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{
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StringBuilder sb = new StringBuilder();
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sb.append( getMessageStub() );
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sb.append( " " );
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sb.append( mMessage.toString() );
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return sb.toString();
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}
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public String getMessageStub()
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{
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StringBuilder sb = new StringBuilder();
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sb.append( super.getMessageStub() );
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if( isEncrypted() )
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{
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sb.append( "ENCRYPTED" );
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}
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else
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{
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if( isImplicitFormat() || getVendor() == Vendor.STANDARD )
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{
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sb.append( getOpcode().getLabel() );
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}
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else
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{
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sb.append( "VENDOR:" + getVendor().getLabel() + " " );
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sb.append( getVendorOpcode().getLabel() );
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}
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}
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return sb.toString();
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}
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public boolean isImplicitFormat()
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{
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return mMessage.get( IMPLICIT_VENDOR_FLAG );
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}
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public LinkControlOpcode getOpcode()
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{
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return LinkControlOpcode.fromValue( mMessage.getInt( OPCODE ) );
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}
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public VendorLinkControlOpcode getVendorOpcode()
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{
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return VendorLinkControlOpcode.fromValue( mMessage.getInt( OPCODE ) );
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}
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public Vendor getVendor()
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{
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if( isImplicitFormat() )
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{
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return Vendor.STANDARD;
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}
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return Vendor.fromValue( mMessage.getInt( VENDOR ) );
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}
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}
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