static void * SILKDecoderCreate (const struct PluginCodec_Definition * codec)
{
SKP_int16 ret;
SKP_int32 decSizeBytes;
struct SILKDecoderControl * ctxt;
/* Create decoder */
ret = SKP_Silk_SDK_Get_Decoder_Size( &decSizeBytes );
if( ret ) {
printf( "\nSKP_Silk_SDK_Get_Decoder_Size returned %d", ret );
}
ctxt = (struct SILKDecoderControl*)malloc(1*(sizeof(struct SILKDecoderControl)+decSizeBytes));
ctxt->context = malloc( decSizeBytes );
ctxt->mutex = new CriticalSection();
ctxt->control.framesPerPacket = codec->parm.audio.maxFramesPerPacket;
ctxt->control.API_sampleRate = codec->sampleRate;
ctxt->control.frameSize = codec->parm.audio.samplesPerFrame;
ctxt->control.inBandFECOffset = 0;
ctxt->control.moreInternalDecoderFrames = 0;
ret = SKP_Silk_SDK_InitDecoder( ctxt->context );
if( ret ) {
printf( "\nSKP_Silk_InitDecoder returned %d", ret );
}
return ctxt;
}
JNIEXPORT jint JNICALL Java_org_sipdroid_codecs_SILK8_open
(JNIEnv *env, jobject obj, jint compression) {
int ret;
if (codec_open++ != 0)
return (jint)0;
/* Set the samplingrate that is requested for the output */
DecControl.sampleRate = 8000;
/* Create decoder */
ret = SKP_Silk_SDK_Get_Decoder_Size( &decSizeBytes );
if( ret ) {
__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG,
"\n!!!!!!!! SKP_Silk_SDK_Get_Decoder_Size returned %d", ret );
}
#ifdef DEBUG_SILK8
__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG,
"### INIT Decoder decSizeBytes = %d\n", decSizeBytes);
#endif
psDec = malloc( decSizeBytes );
/* Reset decoder */
ret = SKP_Silk_SDK_InitDecoder( psDec );
if( ret ) {
__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG,
"\n!!!!!!!! SKP_Silk_InitDecoder returned %d", ret );
}
/* Create Encoder */
ret = SKP_Silk_SDK_Get_Encoder_Size( &encSizeBytes );
if( ret ) {
__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG,
"\n!!!!!!!! SKP_Silk_SDK_Get_Encoder_Size returned %d", ret );
}
#ifdef DEBUG_SILK8
__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG,
"### INIT Encoder encSizeBytes = %d\n", encSizeBytes);
#endif
psEnc = malloc( encSizeBytes );
/* Reset Encoder */
ret = SKP_Silk_SDK_InitEncoder( psEnc, &encControl );
if( ret ) {
__android_log_print(ANDROID_LOG_DEBUG, LOG_TAG,
"\n!!!!!!!! SKP_Silk_SDK_InitEncoder 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 = compression;
encControl.bitRate = targetRate_bps;
return (jint)0;
}
//initialize SILK codec
//sets number of 20mS(160 samples) frames per packet (1-5)
void SILK8_open(int fpp)
{
//set number of 20 mS (160 samoles) frames per packet (1-5)
if ((fpp <= MAX_INPUT_FRAMES) && (fpp > 0))
skp_frames_pp = fpp;
packetSize_ms = skp_frames_pp * 20;
// Set the samplingrate that is requested for the output
DecControl.sampleRate = 8000;
// Create decoder
SKP_Silk_SDK_Get_Decoder_Size(&decSizeBytes);
psDec = malloc(decSizeBytes);
// Reset decoder
SKP_Silk_SDK_InitDecoder(psDec);
// Create Encoder
SKP_Silk_SDK_Get_Encoder_Size(&encSizeBytes);
psEnc = malloc(encSizeBytes);
// Reset Encoder
SKP_Silk_SDK_InitEncoder(psEnc, &encControl);
// Set Encoder parameters
encControl.sampleRate = 8000;
encControl.packetSize = packetSize_ms * 8; //samples per packet
encControl.packetLossPercentage = packetLoss_perc;
encControl.useInBandFEC = INBandFec_enabled;
encControl.useDTX = DTX_enabled;
encControl.complexity = compression;
encControl.bitRate = targetRate_bps;
}
static int create_SILK_decoder(SILK_state* st,
unsigned int rtp_Hz)
{
SKP_int32 ret, decSizeBytes;
/* Set the samplingrate that is requested for the output */
st->decControl.API_sampleRate = rtp_Hz;
/* Initialize to one frame per packet, for proper concealment before first packet arrives */
st->decControl.framesPerPacket = 1;
/* Create decoder */
ret = SKP_Silk_SDK_Get_Decoder_Size( &decSizeBytes );
if( ret ) {
ERROR( "SKP_Silk_SDK_Get_Decoder_Size returned %d", ret );
return ret;
}
st->psDec = malloc( decSizeBytes );
if(st->psDec == NULL) {
ERROR( "could not allocate SILK decoder state" );
return -1;
}
/* Reset decoder */
ret = SKP_Silk_SDK_InitDecoder( st->psDec );
if( ret ) {
ERROR( "SKP_Silk_InitDecoder returned %d", ret );
return ret;
}
return 0;
}
virtual bool Construct()
{
SKP_int32 sizeBytes = 0;
if (SKP_Silk_SDK_Get_Decoder_Size(&sizeBytes) != 0)
return false;
m_state = malloc(sizeBytes);
if (m_state == NULL)
return false;
return SKP_Silk_SDK_InitDecoder(m_state) == 0;
}
bool VoiceEncoder_Silk::Init(int quality) {
m_targetRate_bps = 25000;
m_packetLoss_perc = 0;
int encSizeBytes;
SKP_Silk_SDK_Get_Encoder_Size(&encSizeBytes);
m_pEncoder = malloc(encSizeBytes);
SKP_Silk_SDK_InitEncoder(m_pEncoder, &this->m_encControl);
int decSizeBytes;
SKP_Silk_SDK_Get_Decoder_Size(&decSizeBytes);
m_pDecoder = malloc(decSizeBytes);
SKP_Silk_SDK_InitDecoder(m_pDecoder);
return true;
}
static int decode_update(struct audec_state **adsp,
const struct aucodec *ac, const char *fmtp)
{
struct audec_state *st;
int ret, err = 0;
int32_t dec_size;
(void)fmtp;
if (*adsp)
return 0;
ret = SKP_Silk_SDK_Get_Decoder_Size(&dec_size);
if (ret || dec_size <= 0)
return EINVAL;
st = mem_alloc(sizeof(*st), decode_destructor);
if (!st)
return ENOMEM;
st->dec = mem_alloc(dec_size, NULL);
if (!st->dec) {
err = ENOMEM;
goto out;
}
ret = SKP_Silk_SDK_InitDecoder(st->dec);
if (ret) {
err = EPROTO;
goto out;
}
st->decControl.API_sampleRate = ac->srate;
out:
if (err)
mem_deref(st);
else
*adsp = st;
return err;
}
/*
* Open codec.
*/
static pj_status_t silk_codec_open(pjmedia_codec *codec,
pjmedia_codec_param *attr )
{
silk_private *silk;
silk_param *sp;
SKP_int st_size, err;
pj_bool_t enc_use_fec;
unsigned enc_bitrate, i;
PJ_ASSERT_RETURN(codec && attr, PJ_EINVAL);
silk = (silk_private*)codec->codec_data;
sp = &silk_factory.silk_param[silk->mode];
/* Already opened? */
if (silk->enc_ready || silk->dec_ready)
return PJ_SUCCESS;
/* Allocate and initialize encoder */
err = SKP_Silk_SDK_Get_Encoder_Size(&st_size);
if (err) {
PJ_LOG(3,(THIS_FILE, "Failed to get encoder state size (err=%d)",
err));
return PJMEDIA_CODEC_EFAILED;
}
silk->enc_st = pj_pool_zalloc(silk->pool, st_size);
err = SKP_Silk_SDK_InitEncoder(silk->enc_st, &silk->enc_ctl);
if (err) {
PJ_LOG(3,(THIS_FILE, "Failed to init encoder (err=%d)", err));
return PJMEDIA_CODEC_EFAILED;
}
/* Check fmtp params */
enc_use_fec = PJ_TRUE;
enc_bitrate = sp->bitrate;
for (i = 0; i < attr->setting.enc_fmtp.cnt; ++i) {
pjmedia_codec_fmtp *fmtp = &attr->setting.enc_fmtp;
const pj_str_t STR_USEINBANDFEC = {"useinbandfec", 12};
const pj_str_t STR_MAXAVERAGEBITRATE = {"maxaveragebitrate", 17};
if (!pj_stricmp(&fmtp->param[i].name, &STR_USEINBANDFEC)) {
enc_use_fec = pj_strtoul(&fmtp->param[i].val) != 0;
} else if (!pj_stricmp(&fmtp->param[i].name, &STR_MAXAVERAGEBITRATE)) {
enc_bitrate = pj_strtoul(&fmtp->param[i].val);
if (enc_bitrate > sp->max_bitrate) {
enc_bitrate = sp->max_bitrate;
}
}
}
/* Setup encoder control for encoding process */
silk->enc_ready = PJ_TRUE;
silk->samples_per_frame = FRAME_LENGTH_MS *
attr->info.clock_rate / 1000;
silk->pcm_bytes_per_sample = attr->info.pcm_bits_per_sample / 8;
silk->enc_ctl.API_sampleRate = attr->info.clock_rate;
silk->enc_ctl.maxInternalSampleRate = attr->info.clock_rate;
silk->enc_ctl.packetSize = attr->setting.frm_per_pkt *
silk->samples_per_frame;
/* For useInBandFEC setting to be useful, we need to set
* packetLossPercentage greater than LBRR_LOSS_THRES (1)
*/
silk->enc_ctl.packetLossPercentage = SILK_ENC_CTL_PACKET_LOSS_PCT;
silk->enc_ctl.useInBandFEC = enc_use_fec;
silk->enc_ctl.useDTX = attr->setting.vad;
silk->enc_ctl.complexity = sp->complexity;
silk->enc_ctl.bitRate = enc_bitrate;
/* Allocate and initialize decoder */
err = SKP_Silk_SDK_Get_Decoder_Size(&st_size);
if (err) {
PJ_LOG(3,(THIS_FILE, "Failed to get decoder state size (err=%d)",
err));
return PJMEDIA_CODEC_EFAILED;
}
silk->dec_st = pj_pool_zalloc(silk->pool, st_size);
err = SKP_Silk_SDK_InitDecoder(silk->dec_st);
if (err) {
PJ_LOG(3,(THIS_FILE, "Failed to init decoder (err=%d)", err));
return PJMEDIA_CODEC_EFAILED;
}
/* Setup decoder control for decoding process */
silk->dec_ctl.API_sampleRate = attr->info.clock_rate;
silk->dec_ctl.framesPerPacket = 1; /* for proper PLC at start */
silk->dec_ready = PJ_TRUE;
silk->dec_buf_sz = attr->info.clock_rate * attr->info.channel_cnt *
attr->info.frm_ptime / 1000 *
silk->pcm_bytes_per_sample;
/* Inform the stream to prepare a larger buffer since we cannot parse
* SILK packets and split it into individual frames.
*/
attr->info.max_rx_frame_size = attr->info.max_bps *
attr->info.frm_ptime / 8 / 1000;
if ((attr->info.max_bps * attr->info.frm_ptime) % 8000 != 0)
{
++attr->info.max_rx_frame_size;
}
attr->info.max_rx_frame_size *= SILK_MAX_FRAMES_PER_PACKET;
return PJ_SUCCESS;
}
static switch_status_t switch_silk_init(switch_codec_t *codec,
switch_codec_flag_t freeswitch_flags,
const switch_codec_settings_t *codec_settings)
{
struct silk_context *context = NULL;
switch_codec_fmtp_t codec_fmtp;
silk_codec_settings_t silk_codec_settings;
SKP_int32 encSizeBytes;
SKP_int32 decSizeBytes;
int encoding = (freeswitch_flags & SWITCH_CODEC_FLAG_ENCODE);
int decoding = (freeswitch_flags & SWITCH_CODEC_FLAG_DECODE);
if (!(encoding || decoding) || (!(context = switch_core_alloc(codec->memory_pool, sizeof(*context))))) {
return SWITCH_STATUS_FALSE;
}
memset(&codec_fmtp, '\0', sizeof(struct switch_codec_fmtp));
codec_fmtp.private_info = &silk_codec_settings;
switch_silk_fmtp_parse(codec->fmtp_in, &codec_fmtp);
codec->fmtp_out = switch_core_sprintf(codec->memory_pool, "useinbandfec=%s; usedtx=%s; maxaveragebitrate=%d",
silk_codec_settings.useinbandfec ? "1" : "0",
silk_codec_settings.usedtx ? "1" : "0",
silk_codec_settings.maxaveragebitrate ? silk_codec_settings.maxaveragebitrate : codec->implementation->bits_per_second);
if (encoding) {
if (SKP_Silk_SDK_Get_Encoder_Size(&encSizeBytes)) {
return SWITCH_STATUS_FALSE;
}
context->enc_state = switch_core_alloc(codec->memory_pool, encSizeBytes);
if (SKP_Silk_SDK_InitEncoder(context->enc_state, &context->encoder_object)) {
return SWITCH_STATUS_FALSE;
}
context->encoder_object.API_sampleRate = codec->implementation->actual_samples_per_second;
context->encoder_object.maxInternalSampleRate = codec->implementation->actual_samples_per_second;
context->encoder_object.packetSize = codec->implementation->samples_per_packet;
context->encoder_object.useInBandFEC = silk_codec_settings.useinbandfec;
context->encoder_object.complexity = 0;
context->encoder_object.bitRate = silk_codec_settings.maxaveragebitrate ? silk_codec_settings.maxaveragebitrate : codec->implementation->bits_per_second;
context->encoder_object.useDTX = silk_codec_settings.usedtx;
context->encoder_object.packetLossPercentage = silk_codec_settings.plpct;
}
if (decoding) {
if (SKP_Silk_SDK_Get_Decoder_Size(&decSizeBytes)) {
return SWITCH_STATUS_FALSE;
}
context->dec_state = switch_core_alloc(codec->memory_pool, decSizeBytes);
if (SKP_Silk_SDK_InitDecoder(context->dec_state)) {
return SWITCH_STATUS_FALSE;
}
context->decoder_object.API_sampleRate = codec->implementation->actual_samples_per_second;
}
codec->private_info = context;
return SWITCH_STATUS_SUCCESS;
}
int main( int argc, char* argv[] )
{
unsigned long tottime, starttime;
double filetime;
size_t counter;
SKP_int32 args, totPackets, i, k;
SKP_int16 ret, len, tot_len;
SKP_int16 nBytes;
SKP_uint8 payload[ MAX_BYTES_PER_FRAME * MAX_INPUT_FRAMES * ( MAX_LBRR_DELAY + 1 ) ];
SKP_uint8 *payloadEnd = NULL, *payloadToDec = NULL;
SKP_uint8 FECpayload[ MAX_BYTES_PER_FRAME * MAX_INPUT_FRAMES ], *payloadPtr;
SKP_int16 nBytesFEC;
SKP_int16 nBytesPerPacket[ MAX_LBRR_DELAY + 1 ], totBytes;
SKP_int16 out[ ( ( FRAME_LENGTH_MS * MAX_API_FS_KHZ ) << 1 ) * MAX_INPUT_FRAMES ], *outPtr;
char speechOutFileName[ 150 ], bitInFileName[ 150 ];
FILE *bitInFile, *speechOutFile;
SKP_int32 packetSize_ms=0, API_Fs_Hz = 0;
SKP_int32 decSizeBytes;
void *psDec;
SKP_float loss_prob;
SKP_int32 frames, lost, quiet;
SKP_SILK_SDK_DecControlStruct DecControl;
if( argc < 3 ) {
print_usage( argv );
exit( 0 );
}
/* default settings */
quiet = 0;
loss_prob = 0.0f;
/* get arguments */
args = 1;
strcpy( bitInFileName, argv[ args ] );
args++;
strcpy( speechOutFileName, argv[ args ] );
args++;
while( args < argc ) {
if( SKP_STR_CASEINSENSITIVE_COMPARE( argv[ args ], "-loss" ) == 0 ) {
sscanf( argv[ args + 1 ], "%f", &loss_prob );
args += 2;
} else if( SKP_STR_CASEINSENSITIVE_COMPARE( argv[ args ], "-Fs_API" ) == 0 ) {
sscanf( argv[ args + 1 ], "%d", &API_Fs_Hz );
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 );
}
}
if( !quiet ) {
printf("********** Silk Decoder (Fixed Point) v %s ********************\n", SKP_Silk_SDK_get_version());
printf("********** Compiled for %d bit cpu *******************************\n", (int)sizeof(void*) * 8 );
printf( "Input: %s\n", bitInFileName );
printf( "Output: %s\n", speechOutFileName );
}
/* Open files */
bitInFile = fopen( bitInFileName, "rb" );
if( bitInFile == NULL ) {
printf( "Error: could not open input file %s\n", bitInFileName );
exit( 0 );
}
/* Check Silk header */
{
char header_buf[ 50 ];
fread(header_buf, sizeof(char), 1, bitInFile);
header_buf[ strlen( "" ) ] = '\0'; /* Terminate with a null character */
if( strcmp( header_buf, "" ) != 0 ) {
counter = fread( header_buf, sizeof( char ), strlen( "!SILK_V3" ), bitInFile );
header_buf[ strlen( "!SILK_V3" ) ] = '\0'; /* Terminate with a null character */
if( strcmp( header_buf, "!SILK_V3" ) != 0 ) {
/* Non-equal strings */
printf( "Error: Wrong Header %s\n", header_buf );
exit( 0 );
}
} else {
counter = fread( header_buf, sizeof( char ), strlen( "#!SILK_V3" ), bitInFile );
header_buf[ strlen( "#!SILK_V3" ) ] = '\0'; /* Terminate with a null character */
if( strcmp( header_buf, "#!SILK_V3" ) != 0 ) {
/* Non-equal strings */
printf( "Error: Wrong Header %s\n", header_buf );
exit( 0 );
}
}
}
speechOutFile = fopen( speechOutFileName, "wb" );
if( speechOutFile == NULL ) {
printf( "Error: could not open output file %s\n", speechOutFileName );
exit( 0 );
}
/* Set the samplingrate that is requested for the output */
if( API_Fs_Hz == 0 ) {
DecControl.API_sampleRate = 24000;
} else {
DecControl.API_sampleRate = API_Fs_Hz;
}
/* Initialize to one frame per packet, for proper concealment before first packet arrives */
DecControl.framesPerPacket = 1;
/* Create decoder */
ret = SKP_Silk_SDK_Get_Decoder_Size( &decSizeBytes );
if( ret ) {
printf( "\nSKP_Silk_SDK_Get_Decoder_Size returned %d", ret );
}
psDec = malloc( decSizeBytes );
/* Reset decoder */
ret = SKP_Silk_SDK_InitDecoder( psDec );
if( ret ) {
printf( "\nSKP_Silk_InitDecoder returned %d", ret );
}
totPackets = 0;
tottime = 0;
payloadEnd = payload;
/* Simulate the jitter buffer holding MAX_FEC_DELAY packets */
for( i = 0; i < MAX_LBRR_DELAY; i++ ) {
/* Read payload size */
counter = fread( &nBytes, sizeof( SKP_int16 ), 1, bitInFile );
#ifdef _SYSTEM_IS_BIG_ENDIAN
swap_endian( &nBytes, 1 );
#endif
/* Read payload */
counter = fread( payloadEnd, sizeof( SKP_uint8 ), nBytes, bitInFile );
if( ( SKP_int16 )counter < nBytes ) {
break;
}
nBytesPerPacket[ i ] = nBytes;
payloadEnd += nBytes;
totPackets++;
}
while( 1 ) {
/* Read payload size */
counter = fread( &nBytes, sizeof( SKP_int16 ), 1, bitInFile );
#ifdef _SYSTEM_IS_BIG_ENDIAN
swap_endian( &nBytes, 1 );
#endif
if( nBytes < 0 || counter < 1 ) {
break;
}
/* Read payload */
counter = fread( payloadEnd, sizeof( SKP_uint8 ), nBytes, bitInFile );
if( ( SKP_int16 )counter < nBytes ) {
break;
}
/* Simulate losses */
rand_seed = SKP_RAND( rand_seed );
if( ( ( ( float )( ( rand_seed >> 16 ) + ( 1 << 15 ) ) ) / 65535.0f >= ( loss_prob / 100.0f ) ) && ( counter > 0 ) ) {
nBytesPerPacket[ MAX_LBRR_DELAY ] = nBytes;
payloadEnd += nBytes;
} else {
nBytesPerPacket[ MAX_LBRR_DELAY ] = 0;
}
if( nBytesPerPacket[ 0 ] == 0 ) {
/* Indicate lost packet */
lost = 1;
/* Packet loss. Search after FEC in next packets. Should be done in the jitter buffer */
payloadPtr = payload;
for( i = 0; i < MAX_LBRR_DELAY; i++ ) {
if( nBytesPerPacket[ i + 1 ] > 0 ) {
starttime = GetHighResolutionTime();
SKP_Silk_SDK_search_for_LBRR( payloadPtr, nBytesPerPacket[ i + 1 ], ( i + 1 ), FECpayload, &nBytesFEC );
tottime += GetHighResolutionTime() - starttime;
if( nBytesFEC > 0 ) {
payloadToDec = FECpayload;
nBytes = nBytesFEC;
lost = 0;
break;
}
}
payloadPtr += nBytesPerPacket[ i + 1 ];
}
} else {
lost = 0;
nBytes = nBytesPerPacket[ 0 ];
payloadToDec = payload;
}
/* Silk decoder */
outPtr = out;
tot_len = 0;
starttime = GetHighResolutionTime();
if( lost == 0 ) {
/* No Loss: Decode all frames in the packet */
frames = 0;
do {
/* Decode 20 ms */
ret = SKP_Silk_SDK_Decode( psDec, &DecControl, 0, payloadToDec, nBytes, outPtr, &len );
if( ret ) {
printf( "\nSKP_Silk_SDK_Decode returned %d", ret );
}
frames++;
outPtr += len;
tot_len += len;
if( frames > MAX_INPUT_FRAMES ) {
/* Hack for corrupt stream that could generate too many frames */
outPtr = out;
tot_len = 0;
frames = 0;
}
/* Until last 20 ms frame of packet has been decoded */
} while( DecControl.moreInternalDecoderFrames );
} else {
/* Loss: Decode enough frames to cover one packet duration */
for( i = 0; i < DecControl.framesPerPacket; i++ ) {
/* Generate 20 ms */
ret = SKP_Silk_SDK_Decode( psDec, &DecControl, 1, payloadToDec, nBytes, outPtr, &len );
if( ret ) {
printf( "\nSKP_Silk_Decode returned %d", ret );
}
outPtr += len;
tot_len += len;
}
}
packetSize_ms = tot_len / ( DecControl.API_sampleRate / 1000 );
tottime += GetHighResolutionTime() - starttime;
totPackets++;
/* Write output to file */
#ifdef _SYSTEM_IS_BIG_ENDIAN
swap_endian( out, tot_len );
#endif
fwrite( out, sizeof( SKP_int16 ), tot_len, speechOutFile );
/* Update buffer */
totBytes = 0;
for( i = 0; i < MAX_LBRR_DELAY; i++ ) {
totBytes += nBytesPerPacket[ i + 1 ];
}
SKP_memmove( payload, &payload[ nBytesPerPacket[ 0 ] ], totBytes * sizeof( SKP_uint8 ) );
payloadEnd -= nBytesPerPacket[ 0 ];
SKP_memmove( nBytesPerPacket, &nBytesPerPacket[ 1 ], MAX_LBRR_DELAY * sizeof( SKP_int16 ) );
if( !quiet ) {
fprintf( stderr, "\rPackets decoded: %d", totPackets );
}
}
/*
* Open codec.
*/
static pj_status_t silk_codec_open(pjmedia_codec *codec,
pjmedia_codec_param *attr )
{
pj_status_t status;
struct silk_private *silk;
int id, ret = 0;
unsigned i;
struct silk_param params;
SKP_int32 encSizeBytes, decSizeBytes, API_fs_Hz, max_internal_fs_Hz, maxBitRate;
// useinbandfec: specifies that SILK in-band FEC is supported by the decoder and MAY be used during a session.
// [...] If no value is specified, useinbandfec is assumed to be 1.
SKP_int useInBandFEC = 1;
const pj_str_t STR_FMTP_USE_INBAND_FEC = {"useinbandfec", 12};
const pj_str_t STR_FMTP_MAX_AVERAGE_BITRATE = {"maxaveragebitrate", 17};
silk = (struct silk_private*) codec->codec_data;
id = silk->param_id;
pj_assert(silk != NULL);
pj_assert(silk->enc_ready == PJ_FALSE &&
silk->dec_ready == PJ_FALSE);
params = silk_factory.silk_param[id];
//PJ_LOG(4, (THIS_FILE, "Open silk codec @ %d", params.clock_rate));
/* default settings */
API_fs_Hz = params.clock_rate;
max_internal_fs_Hz = params.clock_rate;
maxBitRate = ( params.bitrate > 0 ? params.bitrate : 0 );
/* Check fmtp params */
for (i = 0; i < attr->setting.enc_fmtp.cnt; ++i) {
if (pj_stricmp(&attr->setting.enc_fmtp.param[i].name,
&STR_FMTP_USE_INBAND_FEC) == 0) {
useInBandFEC = (pj_uint8_t)
(pj_strtoul(&attr->setting.enc_fmtp.param[i].val));
break;
}else if(pj_stricmp(&attr->setting.enc_fmtp.param[i].name,
&STR_FMTP_MAX_AVERAGE_BITRATE) == 0) {
SKP_int32 remoteBitRate = (SKP_int32)(pj_strtoul(&attr->setting.enc_fmtp.param[i].val));
if(remoteBitRate < maxBitRate || maxBitRate == 0){
maxBitRate = remoteBitRate;
}
}
}
/* Create Encoder */
ret = SKP_Silk_SDK_Get_Encoder_Size( &encSizeBytes );
if(ret){
PJ_LOG(1, (THIS_FILE, "Unable to get encoder size : %d", ret));
return PJ_EINVAL;
}
silk->psEnc = pj_pool_zalloc(silk->pool, encSizeBytes);
/* Reset Encoder */
ret = SKP_Silk_SDK_InitEncoder( silk->psEnc, &silk->enc );
if(ret){
PJ_LOG(1, (THIS_FILE, "Unable to init encoder : %d", ret));
return PJ_EINVAL;
}
/* Set Encoder parameters */
silk->enc.API_sampleRate = API_fs_Hz;
silk->enc.maxInternalSampleRate = max_internal_fs_Hz;
silk->enc.packetSize = ( params.packet_size_ms * API_fs_Hz ) / 1000;
// TODO : our packet loss percentage is probably not always 0...
// Should this be configurable? Or set to some value so that FEC works? Well ... if we can get it working...
silk->enc.packetLossPercentage = 0;
silk->enc.useInBandFEC = useInBandFEC;
silk->enc.useDTX = 0;
silk->enc.complexity = params.complexity;
silk->enc.bitRate = maxBitRate;
silk->enc_ready = PJ_TRUE;
//Decoder
/* Create decoder */
ret = SKP_Silk_SDK_Get_Decoder_Size( &decSizeBytes );
if(ret){
PJ_LOG(1, (THIS_FILE, "Unable to get dencoder size : %d", ret));
return PJ_EINVAL;
}
silk->psDec = pj_pool_zalloc(silk->pool, decSizeBytes);
/* Reset decoder */
ret = SKP_Silk_SDK_InitDecoder( silk->psDec );
if(ret){
PJ_LOG(1, (THIS_FILE, "Unable to init dencoder : %d", ret));
return PJ_EINVAL;
}
/* Set Decoder parameters */
silk->dec.API_sampleRate = API_fs_Hz;
silk->dec_ready = PJ_TRUE;
return PJ_SUCCESS;
}
static switch_status_t switch_silk_init(switch_codec_t *codec,
switch_codec_flag_t freeswitch_flags,
const switch_codec_settings_t *codec_settings)
{
struct silk_context *context = NULL;
SKP_int useinbandfec = 0, usedtx = 0, maxaveragebitrate = 0, plpct =0;
SKP_int32 encSizeBytes;
SKP_int32 decSizeBytes;
int encoding = (freeswitch_flags & SWITCH_CODEC_FLAG_ENCODE);
int decoding = (freeswitch_flags & SWITCH_CODEC_FLAG_DECODE);
if (!(encoding || decoding) || (!(context = switch_core_alloc(codec->memory_pool, sizeof(*context))))) {
return SWITCH_STATUS_FALSE;
}
if (codec->fmtp_in) {
int x, argc;
char *argv[10];
argc = switch_separate_string(codec->fmtp_in, ';', argv, (sizeof(argv) / sizeof(argv[0])));
for (x = 0; x < argc; x++) {
char *data = argv[x];
char *arg;
switch_assert(data);
while (*data == ' ') {
data++;
}
if ((arg = strchr(data, '='))) {
*arg++ = '\0';
if (!strcasecmp(data, "useinbandfec")) {
if (switch_true(arg)) {
useinbandfec = 1;
plpct = 10;// 10% for now
}
}
if (!strcasecmp(data, "usedtx")) {
if (switch_true(arg)) {
usedtx = 1;
}
}
if (!strcasecmp(data, "maxaveragebitrate")) {
maxaveragebitrate = atoi(arg);
switch(codec->implementation->actual_samples_per_second) {
case 8000:
{
if(maxaveragebitrate < 6000 || maxaveragebitrate > 20000) {
maxaveragebitrate = 20000;
}
break;
}
case 12000:
{
if(maxaveragebitrate < 7000 || maxaveragebitrate > 25000) {
maxaveragebitrate = 25000;
}
break;
}
case 16000:
{
if(maxaveragebitrate < 8000 || maxaveragebitrate > 30000) {
maxaveragebitrate = 30000;
}
break;
}
case 24000:
{
if(maxaveragebitrate < 12000 || maxaveragebitrate > 40000) {
maxaveragebitrate = 40000;
}
break;
}
default:
/* this should never happen but 20000 is common among all rates */
maxaveragebitrate = 20000;
break;
}
}
}
}
}
codec->fmtp_out = switch_core_sprintf(codec->memory_pool, "useinbandfec=%s; usedtx=%s; maxaveragebitrate=%d",
useinbandfec ? "true" : "false",
usedtx ? "true" : "false",
maxaveragebitrate ? maxaveragebitrate : codec->implementation->bits_per_second);
if (encoding) {
if (SKP_Silk_SDK_Get_Encoder_Size(&encSizeBytes)) {
return SWITCH_STATUS_FALSE;
}
context->enc_state = switch_core_alloc(codec->memory_pool, encSizeBytes);
if (SKP_Silk_SDK_InitEncoder(context->enc_state, &context->encoder_object)) {
return SWITCH_STATUS_FALSE;
}
context->encoder_object.sampleRate = codec->implementation->actual_samples_per_second;
context->encoder_object.packetSize = codec->implementation->samples_per_packet;
context->encoder_object.useInBandFEC = useinbandfec;
context->encoder_object.complexity = 2;
context->encoder_object.bitRate = maxaveragebitrate ? maxaveragebitrate : codec->implementation->bits_per_second;
context->encoder_object.useDTX = usedtx;
context->encoder_object.packetLossPercentage = plpct;;
}
if (decoding) {
if (SKP_Silk_SDK_Get_Decoder_Size(&decSizeBytes)) {
return SWITCH_STATUS_FALSE;
}
context->dec_state = switch_core_alloc(codec->memory_pool, decSizeBytes);
if (SKP_Silk_SDK_InitDecoder(context->dec_state)) {
return SWITCH_STATUS_FALSE;
}
context->decoder_object.sampleRate = codec->implementation->actual_samples_per_second;
}
codec->private_info = context;
return SWITCH_STATUS_SUCCESS;
}
static int load_module(void)
{
SKP_int32 ret = 0;;
int res = 0;
char format_string[100];
char* format;
char* pointer = format_string;
struct ast_format format_struct;
struct ast_format* format_def = &format_struct;
int attr_samp_rate = 0;
/* print the skype version */
ast_log(LOG_NOTICE, "SILK Version : %s\n", SKP_Silk_SDK_get_version());
/* get the encoder / decoder sizes */
ret = SKP_Silk_SDK_Get_Encoder_Size(&encSizeBytes);
if (ret) {
ast_log(LOG_WARNING, "SKP_Silk_SDK_Get_Encoder_size returned %d", ret);
}
ret = SKP_Silk_SDK_Get_Decoder_Size(&decSizeBytes);
if (ret) {
ast_log(LOG_WARNING, "SKP_Silk_SDK_Get_Decoder_size returned %d", ret);
}
/* Finish the setup of the encoders / decoders */
/* silk8 */
ast_format_set(&silk8tolin.src_format, AST_FORMAT_SILK,1,
SILK_ATTR_KEY_SAMP_RATE,
SILK_ATTR_VAL_SAMP_8KHZ,
AST_FORMAT_ATTR_END);
ast_format_set(&silk8tolin.dst_format, AST_FORMAT_SLINEAR,0);
ast_format_set(&lintosilk8.src_format, AST_FORMAT_SLINEAR,0);
ast_format_set(&lintosilk8.dst_format, AST_FORMAT_SILK,1,
SILK_ATTR_KEY_SAMP_RATE,
SILK_ATTR_VAL_SAMP_8KHZ,
AST_FORMAT_ATTR_END);
/* silk12 */
ast_format_set(&silk12tolin.src_format, AST_FORMAT_SILK,1,
SILK_ATTR_KEY_SAMP_RATE,
SILK_ATTR_VAL_SAMP_12KHZ,
AST_FORMAT_ATTR_END);
ast_format_set(&silk12tolin.dst_format, AST_FORMAT_SLINEAR12,0);
ast_format_set(&lintosilk12.src_format, AST_FORMAT_SLINEAR12,0);
ast_format_set(&lintosilk12.dst_format, AST_FORMAT_SILK,1,
SILK_ATTR_KEY_SAMP_RATE,
SILK_ATTR_VAL_SAMP_12KHZ,
AST_FORMAT_ATTR_END);
/* silk16 */
ast_format_set(&silk16tolin.src_format, AST_FORMAT_SILK,1,
SILK_ATTR_KEY_SAMP_RATE,
SILK_ATTR_VAL_SAMP_16KHZ,
AST_FORMAT_ATTR_END);
ast_format_set(&silk16tolin.dst_format, AST_FORMAT_SLINEAR16,0);
ast_format_set(&lintosilk16.src_format, AST_FORMAT_SLINEAR16,0);
ast_format_set(&lintosilk16.dst_format, AST_FORMAT_SILK,1,
SILK_ATTR_KEY_SAMP_RATE,
SILK_ATTR_VAL_SAMP_16KHZ,
AST_FORMAT_ATTR_END);
/* silk24 */
ast_format_set(&silk24tolin.src_format, AST_FORMAT_SILK,1,
SILK_ATTR_KEY_SAMP_RATE,
SILK_ATTR_VAL_SAMP_24KHZ,
AST_FORMAT_ATTR_END);
ast_format_set(&silk24tolin.dst_format, AST_FORMAT_SLINEAR24,0);
ast_format_set(&lintosilk24.src_format, AST_FORMAT_SLINEAR24,0);
ast_format_set(&lintosilk24.dst_format, AST_FORMAT_SILK,1,
SILK_ATTR_KEY_SAMP_RATE,
SILK_ATTR_VAL_SAMP_24KHZ,
AST_FORMAT_ATTR_END);
/* Get the names of the silk codecs */
ast_getformatname_multiple_byid(format_string, sizeof(format_string), AST_FORMAT_SILK);
ast_log(LOG_NOTICE, "Defined silk codecs are: %s\n", format_string);
while ((format = strsep(&pointer, "(|)"))){
if(strlen(format) > 0){
if((format_def = ast_getformatbyname(format, format_def))){
/* now pull out the format attributes */
ret = ast_format_get_value(format_def, SILK_ATTR_KEY_SAMP_RATE, &attr_samp_rate);
if(!ret) {
switch (attr_samp_rate) {
case SILK_ATTR_VAL_SAMP_8KHZ:
res |= ast_register_translator(&silk8tolin);
res |= ast_register_translator(&lintosilk8);
silk8_reg = 1;
break;
case SILK_ATTR_VAL_SAMP_12KHZ:
res |= ast_register_translator(&silk12tolin);
res |= ast_register_translator(&lintosilk12);
silk12_reg = 1;
break;
case SILK_ATTR_VAL_SAMP_16KHZ:
res |= ast_register_translator(&silk16tolin);
res |= ast_register_translator(&lintosilk16);
silk16_reg = 1;
break;
case SILK_ATTR_VAL_SAMP_24KHZ:
res |= ast_register_translator(&silk24tolin);
res |= ast_register_translator(&lintosilk24);
silk24_reg = 1;
break;
}
}
}
}
}
/* register the encoder / decoder */
if(res){
return AST_MODULE_LOAD_FAILURE;
}
return AST_MODULE_LOAD_SUCCESS;
}
