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***********************************************************************/
/*****************************/
/* Silk encoder test program */
/*****************************/
#ifdef _WIN32
#define _CRT_SECURE_NO_DEPRECATE 1
#endif
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include "SKP_Silk_SDK_API.h"
/* Define codec specific settings */
#define MAX_BYTES_PER_FRAME 250 // Equals peak bitrate of 100 kbps
#define MAX_INPUT_FRAMES 5
#define MAX_LBRR_DELAY 2
#define MAX_FRAME_LENGTH 480
static void print_usage( char* argv[] ) {
printf( "\nusage: %s in.pcm out.bit [settings]\n", argv[ 0 ] );
printf( "\nin.pcm : Speech input to encoder" );
printf( "\nout.bit : Bitstream output from encoder" );
printf( "\n settings:" );
printf( "\n-fs <kHz> : Sampling rate in kHz, default: 24" );
printf( "\n-packetlength <ms> : Packet interval in ms, default: 20" );
printf( "\n-rate <bps> : Target bitrate; default: 25000" );
printf( "\n-loss <perc> : Uplink loss estimate, in percent (0-100); default: 0" );
printf( "\n-inbandFEC <flag> : Enable inband FEC usage (0/1); default: 0" );
printf( "\n-complexity <comp> : Set complexity, 0: low, 1: medium, 2: high; default: 2" );
printf( "\n-DTX <flag> : Enable DTX (0/1); default: 0" );
printf( "\n-quiet : Print only some basic values" );
printf( "\n");
}
int main( int argc, char* argv[] )
{
size_t counter;
SKP_int k, args, totPackets, totActPackets, ret;
SKP_int16 nBytes;
double sumBytes, sumWBytes, sumActBytes, avg_rate, act_rate, wght_rate, nrg;
SKP_uint8 payload[ MAX_BYTES_PER_FRAME * MAX_INPUT_FRAMES ];
SKP_int16 in[ MAX_FRAME_LENGTH * MAX_INPUT_FRAMES ];
char speechInFileName[ 150 ], bitOutFileName[ 150 ];
FILE *bitOutFile, *speechInFile;
SKP_int32 encSizeBytes;
void *psEnc;
/* default settings */
SKP_int fs_kHz = 24;
SKP_int targetRate_bps = 25000;
SKP_int packetSize_ms = 20;
SKP_int frameSizeReadFromFile_ms = 20;
SKP_int packetLoss_perc = 0, complexity_mode = 2, smplsSinceLastPacket;
SKP_int INBandFec_enabled = 0, DTX_enabled = 0, quiet = 0;
SKP_SILK_SDK_EncControlStruct encControl; // Struct for input to encoder
if( argc < 3 ) {
print_usage( argv );
exit( 0 );
}
/* get arguments */
args = 1;
strcpy( speechInFileName, argv[ args ] );
args++;
strcpy( bitOutFileName, argv[ args ] );
args++;
while( args < argc ) {
if( SKP_STR_CASEINSENSITIVE_COMPARE( argv[ args ], "-fs" ) == 0 ) {
sscanf( argv[ args + 1 ], "%d", &fs_kHz );
args += 2;
} else if( SKP_STR_CASEINSENSITIVE_COMPARE( argv[ args ], "-packetlength" ) == 0 ) {
sscanf( argv[ args + 1 ], "%d", &packetSize_ms );
args += 2;
} else if( SKP_STR_CASEINSENSITIVE_COMPARE( argv[ args ], "-rate" ) == 0 ) {
sscanf( argv[ args + 1 ], "%d", &targetRate_bps );
args += 2;
} else if( SKP_STR_CASEINSENSITIVE_COMPARE( argv[ args ], "-loss" ) == 0 ) {
sscanf( argv[ args + 1 ], "%d", &packetLoss_perc );
args += 2;
} else if( SKP_STR_CASEINSENSITIVE_COMPARE( argv[ args ], "-complexity" ) == 0 ) {
sscanf( argv[ args + 1 ], "%d", &complexity_mode );
args += 2;
} else if( SKP_STR_CASEINSENSITIVE_COMPARE( argv[ args ], "-inbandFEC" ) == 0 ) {
sscanf( argv[ args + 1 ], "%d", &INBandFec_enabled );
args += 2;
} else if( SKP_STR_CASEINSENSITIVE_COMPARE( argv[ args ], "-DTX") == 0 ) {
sscanf( argv[ args + 1 ], "%d", &DTX_enabled );
args += 2;
} else if( SKP_STR_CASEINSENSITIVE_COMPARE( argv[ args ], "-quiet" ) == 0 ) {
quiet = 1;
args++;
} else {
printf( "Error: unrecognized setting: %s\n\n", argv[ args ] );
print_usage( argv );
exit( 0 );
}
}
/* Print options */
if( !quiet ) {
printf("******************* Silk Encoder v %s ****************\n", SKP_Silk_SDK_get_version());
printf("******************* Compiled for %d bit cpu ********* \n", (int)sizeof(void*) * 8 );
printf( "Input: %s\n", speechInFileName );
printf( "Output: %s\n", bitOutFileName );
printf( "Sampling rate: %d kHz\n", fs_kHz);
printf( "Packet interval: %d ms\n", packetSize_ms);
printf( "Inband FEC used: %d\n", INBandFec_enabled);
printf( "DTX used: %d\n", DTX_enabled);
printf( "Complexity: %d\n", complexity_mode);
printf( "Target bitrate: %d bps\n", targetRate_bps);
}
/* Open files */
speechInFile = fopen( speechInFileName, "rb" );
if( speechInFile == NULL ) {
printf( "Error: could not open input file %s\n", speechInFileName );
exit( 0 );
}
bitOutFile = fopen( bitOutFileName, "wb" );
if( bitOutFile == NULL ) {
printf( "Error: could not open output file %s\n", bitOutFileName );
exit( 0 );
}
/* Create Encoder */
ret = SKP_Silk_SDK_Get_Encoder_Size( &encSizeBytes );
if( ret ) {
printf( "\nSKP_Silk_create_encoder returned %d", ret );
}
psEnc = malloc( encSizeBytes );
/* Reset Encoder */
ret = SKP_Silk_SDK_InitEncoder( psEnc, &encControl );
if( ret ) {
printf( "\nSKP_Silk_reset_encoder returned %d", ret );
}
/* Set Encoder parameters */
encControl.sampleRate = fs_kHz * 1000;
encControl.packetSize = packetSize_ms * fs_kHz;
encControl.packetLossPercentage = packetLoss_perc;
encControl.useInBandFEC = INBandFec_enabled;
encControl.useDTX = DTX_enabled;
encControl.complexity = complexity_mode;
encControl.bitRate = targetRate_bps;
if( fs_kHz > 24 || fs_kHz < 0 ) {
printf( "\nError: Sampling rate = %d out of range, valid range 8 - 24 \n \n", fs_kHz );
exit( 0 );
}
totPackets = 0;
totActPackets = 0;
smplsSinceLastPacket = 0;
sumBytes = 0.0;
sumActBytes = 0.0;
sumWBytes = 0.0;
while( 1 ) {
/* Read input to file */
counter = fread( in, sizeof( SKP_int16 ), frameSizeReadFromFile_ms * fs_kHz, speechInFile );
if( (SKP_int)counter < frameSizeReadFromFile_ms * fs_kHz ) {
break;
}
/* max payload size */
nBytes = MAX_BYTES_PER_FRAME * MAX_INPUT_FRAMES;
/* Silk Encoder */
ret = SKP_Silk_SDK_Encode( psEnc, &encControl, in, (SKP_int16)counter, payload, &nBytes );
if( ret ) {
printf( "\nSKP_Silk_Encode returned %d", ret );
break;
}
/* Get packet size */
packetSize_ms = (SKP_int)( 1000 * encControl.packetSize ) / encControl.sampleRate;
smplsSinceLastPacket += (SKP_int)counter;
if( ( smplsSinceLastPacket / fs_kHz ) == packetSize_ms ) {
/* Sends a dummy zero size packet in case of DTX period */
/* to make it work with the decoder test program. */
/* In practice should be handled by RTP sequence numbers */
totPackets++;
sumBytes += nBytes;
sumWBytes += pow( (double)nBytes, 10.0 );
nrg = 0.0;
for( k = 0; k < (SKP_int)counter; k++ ) {
nrg += in[ k ] * (double)in[ k ];
}
if( ( nrg / (SKP_int)counter ) > 1e3 ) {
sumActBytes += nBytes;
totActPackets++;
}
/* Write payload size */
fwrite( &nBytes, sizeof( SKP_int16 ), 1, bitOutFile );
/* Write payload */
fwrite( payload, sizeof( SKP_uint8 ), nBytes, bitOutFile );
if( !quiet ) {
fprintf( stderr, "\rPackets encoded: %d", totPackets );
}
smplsSinceLastPacket = 0;
}
}
/* Write dummy because it can not end with 0 bytes */
nBytes = -1;
/* Write payload size */
fwrite( &nBytes, sizeof( SKP_int16 ), 1, bitOutFile );
/* Query encoder */
packetSize_ms = (SKP_int)( 1000 * encControl.packetSize ) / encControl.sampleRate;
/* Free Encoder */
free( psEnc );
fclose( speechInFile );
fclose( bitOutFile );
avg_rate = 8.0 / packetSize_ms * sumBytes / totPackets;
act_rate = 8.0 / packetSize_ms * sumActBytes / totActPackets;
wght_rate = 8.0 / packetSize_ms * pow( sumWBytes / totPackets, 0.1 );
if( !quiet ) {
printf( "\nAverage bitrate: %.3f kbps", avg_rate );
printf( "\nActive bitrate: %.3f kbps", act_rate );
printf( "\nWeighted bitrate: %.3f kbps", wght_rate );
printf( "\n\n" );
} else {
/* print average and weighted bitrates */
printf( "%.3f %.3f %.3f \n", avg_rate, act_rate, wght_rate );
}
return 0;
}