cannam@154: /***********************************************************************
cannam@154: Copyright (c) 2006-2011, Skype Limited. All rights reserved.
cannam@154: Redistribution and use in source and binary forms, with or without
cannam@154: modification, are permitted provided that the following conditions
cannam@154: are met:
cannam@154: - Redistributions of source code must retain the above copyright notice,
cannam@154: this list of conditions and the following disclaimer.
cannam@154: - Redistributions in binary form must reproduce the above copyright
cannam@154: notice, this list of conditions and the following disclaimer in the
cannam@154: documentation and/or other materials provided with the distribution.
cannam@154: - Neither the name of Internet Society, IETF or IETF Trust, nor the
cannam@154: names of specific contributors, may be used to endorse or promote
cannam@154: products derived from this software without specific prior written
cannam@154: permission.
cannam@154: THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
cannam@154: AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
cannam@154: IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
cannam@154: ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
cannam@154: LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
cannam@154: CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
cannam@154: SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
cannam@154: INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
cannam@154: CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
cannam@154: ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
cannam@154: POSSIBILITY OF SUCH DAMAGE.
cannam@154: ***********************************************************************/
cannam@154: 
cannam@154: #ifdef HAVE_CONFIG_H
cannam@154: #include "config.h"
cannam@154: #endif
cannam@154: #ifdef FIXED_POINT
cannam@154: #include "main_FIX.h"
cannam@154: #define silk_encoder_state_Fxx      silk_encoder_state_FIX
cannam@154: #else
cannam@154: #include "main_FLP.h"
cannam@154: #define silk_encoder_state_Fxx      silk_encoder_state_FLP
cannam@154: #endif
cannam@154: #include "stack_alloc.h"
cannam@154: #include "tuning_parameters.h"
cannam@154: #include "pitch_est_defines.h"
cannam@154: 
cannam@154: static opus_int silk_setup_resamplers(
cannam@154:     silk_encoder_state_Fxx          *psEnc,             /* I/O                      */
cannam@154:     opus_int                        fs_kHz              /* I                        */
cannam@154: );
cannam@154: 
cannam@154: static opus_int silk_setup_fs(
cannam@154:     silk_encoder_state_Fxx          *psEnc,             /* I/O                      */
cannam@154:     opus_int                        fs_kHz,             /* I                        */
cannam@154:     opus_int                        PacketSize_ms       /* I                        */
cannam@154: );
cannam@154: 
cannam@154: static opus_int silk_setup_complexity(
cannam@154:     silk_encoder_state              *psEncC,            /* I/O                      */
cannam@154:     opus_int                        Complexity          /* I                        */
cannam@154: );
cannam@154: 
cannam@154: static OPUS_INLINE opus_int silk_setup_LBRR(
cannam@154:     silk_encoder_state              *psEncC,            /* I/O                      */
cannam@154:     const silk_EncControlStruct     *encControl         /* I                        */
cannam@154: );
cannam@154: 
cannam@154: 
cannam@154: /* Control encoder */
cannam@154: opus_int silk_control_encoder(
cannam@154:     silk_encoder_state_Fxx          *psEnc,                                 /* I/O  Pointer to Silk encoder state                                               */
cannam@154:     silk_EncControlStruct           *encControl,                            /* I    Control structure                                                           */
cannam@154:     const opus_int                  allow_bw_switch,                        /* I    Flag to allow switching audio bandwidth                                     */
cannam@154:     const opus_int                  channelNb,                              /* I    Channel number                                                              */
cannam@154:     const opus_int                  force_fs_kHz
cannam@154: )
cannam@154: {
cannam@154:     opus_int   fs_kHz, ret = 0;
cannam@154: 
cannam@154:     psEnc->sCmn.useDTX                 = encControl->useDTX;
cannam@154:     psEnc->sCmn.useCBR                 = encControl->useCBR;
cannam@154:     psEnc->sCmn.API_fs_Hz              = encControl->API_sampleRate;
cannam@154:     psEnc->sCmn.maxInternal_fs_Hz      = encControl->maxInternalSampleRate;
cannam@154:     psEnc->sCmn.minInternal_fs_Hz      = encControl->minInternalSampleRate;
cannam@154:     psEnc->sCmn.desiredInternal_fs_Hz  = encControl->desiredInternalSampleRate;
cannam@154:     psEnc->sCmn.useInBandFEC           = encControl->useInBandFEC;
cannam@154:     psEnc->sCmn.nChannelsAPI           = encControl->nChannelsAPI;
cannam@154:     psEnc->sCmn.nChannelsInternal      = encControl->nChannelsInternal;
cannam@154:     psEnc->sCmn.allow_bandwidth_switch = allow_bw_switch;
cannam@154:     psEnc->sCmn.channelNb              = channelNb;
cannam@154: 
cannam@154:     if( psEnc->sCmn.controlled_since_last_payload != 0 && psEnc->sCmn.prefillFlag == 0 ) {
cannam@154:         if( psEnc->sCmn.API_fs_Hz != psEnc->sCmn.prev_API_fs_Hz && psEnc->sCmn.fs_kHz > 0 ) {
cannam@154:             /* Change in API sampling rate in the middle of encoding a packet */
cannam@154:             ret += silk_setup_resamplers( psEnc, psEnc->sCmn.fs_kHz );
cannam@154:         }
cannam@154:         return ret;
cannam@154:     }
cannam@154: 
cannam@154:     /* Beyond this point we know that there are no previously coded frames in the payload buffer */
cannam@154: 
cannam@154:     /********************************************/
cannam@154:     /* Determine internal sampling rate         */
cannam@154:     /********************************************/
cannam@154:     fs_kHz = silk_control_audio_bandwidth( &psEnc->sCmn, encControl );
cannam@154:     if( force_fs_kHz ) {
cannam@154:        fs_kHz = force_fs_kHz;
cannam@154:     }
cannam@154:     /********************************************/
cannam@154:     /* Prepare resampler and buffered data      */
cannam@154:     /********************************************/
cannam@154:     ret += silk_setup_resamplers( psEnc, fs_kHz );
cannam@154: 
cannam@154:     /********************************************/
cannam@154:     /* Set internal sampling frequency          */
cannam@154:     /********************************************/
cannam@154:     ret += silk_setup_fs( psEnc, fs_kHz, encControl->payloadSize_ms );
cannam@154: 
cannam@154:     /********************************************/
cannam@154:     /* Set encoding complexity                  */
cannam@154:     /********************************************/
cannam@154:     ret += silk_setup_complexity( &psEnc->sCmn, encControl->complexity  );
cannam@154: 
cannam@154:     /********************************************/
cannam@154:     /* Set packet loss rate measured by farend  */
cannam@154:     /********************************************/
cannam@154:     psEnc->sCmn.PacketLoss_perc = encControl->packetLossPercentage;
cannam@154: 
cannam@154:     /********************************************/
cannam@154:     /* Set LBRR usage                           */
cannam@154:     /********************************************/
cannam@154:     ret += silk_setup_LBRR( &psEnc->sCmn, encControl );
cannam@154: 
cannam@154:     psEnc->sCmn.controlled_since_last_payload = 1;
cannam@154: 
cannam@154:     return ret;
cannam@154: }
cannam@154: 
cannam@154: static opus_int silk_setup_resamplers(
cannam@154:     silk_encoder_state_Fxx          *psEnc,             /* I/O                      */
cannam@154:     opus_int                         fs_kHz              /* I                        */
cannam@154: )
cannam@154: {
cannam@154:     opus_int   ret = SILK_NO_ERROR;
cannam@154:     SAVE_STACK;
cannam@154: 
cannam@154:     if( psEnc->sCmn.fs_kHz != fs_kHz || psEnc->sCmn.prev_API_fs_Hz != psEnc->sCmn.API_fs_Hz )
cannam@154:     {
cannam@154:         if( psEnc->sCmn.fs_kHz == 0 ) {
cannam@154:             /* Initialize the resampler for enc_API.c preparing resampling from API_fs_Hz to fs_kHz */
cannam@154:             ret += silk_resampler_init( &psEnc->sCmn.resampler_state, psEnc->sCmn.API_fs_Hz, fs_kHz * 1000, 1 );
cannam@154:         } else {
cannam@154:             VARDECL( opus_int16, x_buf_API_fs_Hz );
cannam@154:             VARDECL( silk_resampler_state_struct, temp_resampler_state );
cannam@154: #ifdef FIXED_POINT
cannam@154:             opus_int16 *x_bufFIX = psEnc->x_buf;
cannam@154: #else
cannam@154:             VARDECL( opus_int16, x_bufFIX );
cannam@154:             opus_int32 new_buf_samples;
cannam@154: #endif
cannam@154:             opus_int32 api_buf_samples;
cannam@154:             opus_int32 old_buf_samples;
cannam@154:             opus_int32 buf_length_ms;
cannam@154: 
cannam@154:             buf_length_ms = silk_LSHIFT( psEnc->sCmn.nb_subfr * 5, 1 ) + LA_SHAPE_MS;
cannam@154:             old_buf_samples = buf_length_ms * psEnc->sCmn.fs_kHz;
cannam@154: 
cannam@154: #ifndef FIXED_POINT
cannam@154:             new_buf_samples = buf_length_ms * fs_kHz;
cannam@154:             ALLOC( x_bufFIX, silk_max( old_buf_samples, new_buf_samples ),
cannam@154:                    opus_int16 );
cannam@154:             silk_float2short_array( x_bufFIX, psEnc->x_buf, old_buf_samples );
cannam@154: #endif
cannam@154: 
cannam@154:             /* Initialize resampler for temporary resampling of x_buf data to API_fs_Hz */
cannam@154:             ALLOC( temp_resampler_state, 1, silk_resampler_state_struct );
cannam@154:             ret += silk_resampler_init( temp_resampler_state, silk_SMULBB( psEnc->sCmn.fs_kHz, 1000 ), psEnc->sCmn.API_fs_Hz, 0 );
cannam@154: 
cannam@154:             /* Calculate number of samples to temporarily upsample */
cannam@154:             api_buf_samples = buf_length_ms * silk_DIV32_16( psEnc->sCmn.API_fs_Hz, 1000 );
cannam@154: 
cannam@154:             /* Temporary resampling of x_buf data to API_fs_Hz */
cannam@154:             ALLOC( x_buf_API_fs_Hz, api_buf_samples, opus_int16 );
cannam@154:             ret += silk_resampler( temp_resampler_state, x_buf_API_fs_Hz, x_bufFIX, old_buf_samples );
cannam@154: 
cannam@154:             /* Initialize the resampler for enc_API.c preparing resampling from API_fs_Hz to fs_kHz */
cannam@154:             ret += silk_resampler_init( &psEnc->sCmn.resampler_state, psEnc->sCmn.API_fs_Hz, silk_SMULBB( fs_kHz, 1000 ), 1 );
cannam@154: 
cannam@154:             /* Correct resampler state by resampling buffered data from API_fs_Hz to fs_kHz */
cannam@154:             ret += silk_resampler( &psEnc->sCmn.resampler_state, x_bufFIX, x_buf_API_fs_Hz, api_buf_samples );
cannam@154: 
cannam@154: #ifndef FIXED_POINT
cannam@154:             silk_short2float_array( psEnc->x_buf, x_bufFIX, new_buf_samples);
cannam@154: #endif
cannam@154:         }
cannam@154:     }
cannam@154: 
cannam@154:     psEnc->sCmn.prev_API_fs_Hz = psEnc->sCmn.API_fs_Hz;
cannam@154: 
cannam@154:     RESTORE_STACK;
cannam@154:     return ret;
cannam@154: }
cannam@154: 
cannam@154: static opus_int silk_setup_fs(
cannam@154:     silk_encoder_state_Fxx          *psEnc,             /* I/O                      */
cannam@154:     opus_int                        fs_kHz,             /* I                        */
cannam@154:     opus_int                        PacketSize_ms       /* I                        */
cannam@154: )
cannam@154: {
cannam@154:     opus_int ret = SILK_NO_ERROR;
cannam@154: 
cannam@154:     /* Set packet size */
cannam@154:     if( PacketSize_ms != psEnc->sCmn.PacketSize_ms ) {
cannam@154:         if( ( PacketSize_ms !=  10 ) &&
cannam@154:             ( PacketSize_ms !=  20 ) &&
cannam@154:             ( PacketSize_ms !=  40 ) &&
cannam@154:             ( PacketSize_ms !=  60 ) ) {
cannam@154:             ret = SILK_ENC_PACKET_SIZE_NOT_SUPPORTED;
cannam@154:         }
cannam@154:         if( PacketSize_ms <= 10 ) {
cannam@154:             psEnc->sCmn.nFramesPerPacket = 1;
cannam@154:             psEnc->sCmn.nb_subfr = PacketSize_ms == 10 ? 2 : 1;
cannam@154:             psEnc->sCmn.frame_length = silk_SMULBB( PacketSize_ms, fs_kHz );
cannam@154:             psEnc->sCmn.pitch_LPC_win_length = silk_SMULBB( FIND_PITCH_LPC_WIN_MS_2_SF, fs_kHz );
cannam@154:             if( psEnc->sCmn.fs_kHz == 8 ) {
cannam@154:                 psEnc->sCmn.pitch_contour_iCDF = silk_pitch_contour_10_ms_NB_iCDF;
cannam@154:             } else {
cannam@154:                 psEnc->sCmn.pitch_contour_iCDF = silk_pitch_contour_10_ms_iCDF;
cannam@154:             }
cannam@154:         } else {
cannam@154:             psEnc->sCmn.nFramesPerPacket = silk_DIV32_16( PacketSize_ms, MAX_FRAME_LENGTH_MS );
cannam@154:             psEnc->sCmn.nb_subfr = MAX_NB_SUBFR;
cannam@154:             psEnc->sCmn.frame_length = silk_SMULBB( 20, fs_kHz );
cannam@154:             psEnc->sCmn.pitch_LPC_win_length = silk_SMULBB( FIND_PITCH_LPC_WIN_MS, fs_kHz );
cannam@154:             if( psEnc->sCmn.fs_kHz == 8 ) {
cannam@154:                 psEnc->sCmn.pitch_contour_iCDF = silk_pitch_contour_NB_iCDF;
cannam@154:             } else {
cannam@154:                 psEnc->sCmn.pitch_contour_iCDF = silk_pitch_contour_iCDF;
cannam@154:             }
cannam@154:         }
cannam@154:         psEnc->sCmn.PacketSize_ms  = PacketSize_ms;
cannam@154:         psEnc->sCmn.TargetRate_bps = 0;         /* trigger new SNR computation */
cannam@154:     }
cannam@154: 
cannam@154:     /* Set internal sampling frequency */
cannam@154:     celt_assert( fs_kHz == 8 || fs_kHz == 12 || fs_kHz == 16 );
cannam@154:     celt_assert( psEnc->sCmn.nb_subfr == 2 || psEnc->sCmn.nb_subfr == 4 );
cannam@154:     if( psEnc->sCmn.fs_kHz != fs_kHz ) {
cannam@154:         /* reset part of the state */
cannam@154:         silk_memset( &psEnc->sShape,               0, sizeof( psEnc->sShape ) );
cannam@154:         silk_memset( &psEnc->sCmn.sNSQ,            0, sizeof( psEnc->sCmn.sNSQ ) );
cannam@154:         silk_memset( psEnc->sCmn.prev_NLSFq_Q15,   0, sizeof( psEnc->sCmn.prev_NLSFq_Q15 ) );
cannam@154:         silk_memset( &psEnc->sCmn.sLP.In_LP_State, 0, sizeof( psEnc->sCmn.sLP.In_LP_State ) );
cannam@154:         psEnc->sCmn.inputBufIx                  = 0;
cannam@154:         psEnc->sCmn.nFramesEncoded              = 0;
cannam@154:         psEnc->sCmn.TargetRate_bps              = 0;     /* trigger new SNR computation */
cannam@154: 
cannam@154:         /* Initialize non-zero parameters */
cannam@154:         psEnc->sCmn.prevLag                     = 100;
cannam@154:         psEnc->sCmn.first_frame_after_reset     = 1;
cannam@154:         psEnc->sShape.LastGainIndex             = 10;
cannam@154:         psEnc->sCmn.sNSQ.lagPrev                = 100;
cannam@154:         psEnc->sCmn.sNSQ.prev_gain_Q16          = 65536;
cannam@154:         psEnc->sCmn.prevSignalType              = TYPE_NO_VOICE_ACTIVITY;
cannam@154: 
cannam@154:         psEnc->sCmn.fs_kHz = fs_kHz;
cannam@154:         if( psEnc->sCmn.fs_kHz == 8 ) {
cannam@154:             if( psEnc->sCmn.nb_subfr == MAX_NB_SUBFR ) {
cannam@154:                 psEnc->sCmn.pitch_contour_iCDF = silk_pitch_contour_NB_iCDF;
cannam@154:             } else {
cannam@154:                 psEnc->sCmn.pitch_contour_iCDF = silk_pitch_contour_10_ms_NB_iCDF;
cannam@154:             }
cannam@154:         } else {
cannam@154:             if( psEnc->sCmn.nb_subfr == MAX_NB_SUBFR ) {
cannam@154:                 psEnc->sCmn.pitch_contour_iCDF = silk_pitch_contour_iCDF;
cannam@154:             } else {
cannam@154:                 psEnc->sCmn.pitch_contour_iCDF = silk_pitch_contour_10_ms_iCDF;
cannam@154:             }
cannam@154:         }
cannam@154:         if( psEnc->sCmn.fs_kHz == 8 || psEnc->sCmn.fs_kHz == 12 ) {
cannam@154:             psEnc->sCmn.predictLPCOrder = MIN_LPC_ORDER;
cannam@154:             psEnc->sCmn.psNLSF_CB  = &silk_NLSF_CB_NB_MB;
cannam@154:         } else {
cannam@154:             psEnc->sCmn.predictLPCOrder = MAX_LPC_ORDER;
cannam@154:             psEnc->sCmn.psNLSF_CB  = &silk_NLSF_CB_WB;
cannam@154:         }
cannam@154:         psEnc->sCmn.subfr_length   = SUB_FRAME_LENGTH_MS * fs_kHz;
cannam@154:         psEnc->sCmn.frame_length   = silk_SMULBB( psEnc->sCmn.subfr_length, psEnc->sCmn.nb_subfr );
cannam@154:         psEnc->sCmn.ltp_mem_length = silk_SMULBB( LTP_MEM_LENGTH_MS, fs_kHz );
cannam@154:         psEnc->sCmn.la_pitch       = silk_SMULBB( LA_PITCH_MS, fs_kHz );
cannam@154:         psEnc->sCmn.max_pitch_lag  = silk_SMULBB( 18, fs_kHz );
cannam@154:         if( psEnc->sCmn.nb_subfr == MAX_NB_SUBFR ) {
cannam@154:             psEnc->sCmn.pitch_LPC_win_length = silk_SMULBB( FIND_PITCH_LPC_WIN_MS, fs_kHz );
cannam@154:         } else {
cannam@154:             psEnc->sCmn.pitch_LPC_win_length = silk_SMULBB( FIND_PITCH_LPC_WIN_MS_2_SF, fs_kHz );
cannam@154:         }
cannam@154:         if( psEnc->sCmn.fs_kHz == 16 ) {
cannam@154:             psEnc->sCmn.pitch_lag_low_bits_iCDF = silk_uniform8_iCDF;
cannam@154:         } else if( psEnc->sCmn.fs_kHz == 12 ) {
cannam@154:             psEnc->sCmn.pitch_lag_low_bits_iCDF = silk_uniform6_iCDF;
cannam@154:         } else {
cannam@154:             psEnc->sCmn.pitch_lag_low_bits_iCDF = silk_uniform4_iCDF;
cannam@154:         }
cannam@154:     }
cannam@154: 
cannam@154:     /* Check that settings are valid */
cannam@154:     celt_assert( ( psEnc->sCmn.subfr_length * psEnc->sCmn.nb_subfr ) == psEnc->sCmn.frame_length );
cannam@154: 
cannam@154:     return ret;
cannam@154: }
cannam@154: 
cannam@154: static opus_int silk_setup_complexity(
cannam@154:     silk_encoder_state              *psEncC,            /* I/O                      */
cannam@154:     opus_int                        Complexity          /* I                        */
cannam@154: )
cannam@154: {
cannam@154:     opus_int ret = 0;
cannam@154: 
cannam@154:     /* Set encoding complexity */
cannam@154:     celt_assert( Complexity >= 0 && Complexity <= 10 );
cannam@154:     if( Complexity < 1 ) {
cannam@154:         psEncC->pitchEstimationComplexity       = SILK_PE_MIN_COMPLEX;
cannam@154:         psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.8, 16 );
cannam@154:         psEncC->pitchEstimationLPCOrder         = 6;
cannam@154:         psEncC->shapingLPCOrder                 = 12;
cannam@154:         psEncC->la_shape                        = 3 * psEncC->fs_kHz;
cannam@154:         psEncC->nStatesDelayedDecision          = 1;
cannam@154:         psEncC->useInterpolatedNLSFs            = 0;
cannam@154:         psEncC->NLSF_MSVQ_Survivors             = 2;
cannam@154:         psEncC->warping_Q16                     = 0;
cannam@154:     } else if( Complexity < 2 ) {
cannam@154:         psEncC->pitchEstimationComplexity       = SILK_PE_MID_COMPLEX;
cannam@154:         psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.76, 16 );
cannam@154:         psEncC->pitchEstimationLPCOrder         = 8;
cannam@154:         psEncC->shapingLPCOrder                 = 14;
cannam@154:         psEncC->la_shape                        = 5 * psEncC->fs_kHz;
cannam@154:         psEncC->nStatesDelayedDecision          = 1;
cannam@154:         psEncC->useInterpolatedNLSFs            = 0;
cannam@154:         psEncC->NLSF_MSVQ_Survivors             = 3;
cannam@154:         psEncC->warping_Q16                     = 0;
cannam@154:     } else if( Complexity < 3 ) {
cannam@154:         psEncC->pitchEstimationComplexity       = SILK_PE_MIN_COMPLEX;
cannam@154:         psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.8, 16 );
cannam@154:         psEncC->pitchEstimationLPCOrder         = 6;
cannam@154:         psEncC->shapingLPCOrder                 = 12;
cannam@154:         psEncC->la_shape                        = 3 * psEncC->fs_kHz;
cannam@154:         psEncC->nStatesDelayedDecision          = 2;
cannam@154:         psEncC->useInterpolatedNLSFs            = 0;
cannam@154:         psEncC->NLSF_MSVQ_Survivors             = 2;
cannam@154:         psEncC->warping_Q16                     = 0;
cannam@154:     } else if( Complexity < 4 ) {
cannam@154:         psEncC->pitchEstimationComplexity       = SILK_PE_MID_COMPLEX;
cannam@154:         psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.76, 16 );
cannam@154:         psEncC->pitchEstimationLPCOrder         = 8;
cannam@154:         psEncC->shapingLPCOrder                 = 14;
cannam@154:         psEncC->la_shape                        = 5 * psEncC->fs_kHz;
cannam@154:         psEncC->nStatesDelayedDecision          = 2;
cannam@154:         psEncC->useInterpolatedNLSFs            = 0;
cannam@154:         psEncC->NLSF_MSVQ_Survivors             = 4;
cannam@154:         psEncC->warping_Q16                     = 0;
cannam@154:     } else if( Complexity < 6 ) {
cannam@154:         psEncC->pitchEstimationComplexity       = SILK_PE_MID_COMPLEX;
cannam@154:         psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.74, 16 );
cannam@154:         psEncC->pitchEstimationLPCOrder         = 10;
cannam@154:         psEncC->shapingLPCOrder                 = 16;
cannam@154:         psEncC->la_shape                        = 5 * psEncC->fs_kHz;
cannam@154:         psEncC->nStatesDelayedDecision          = 2;
cannam@154:         psEncC->useInterpolatedNLSFs            = 1;
cannam@154:         psEncC->NLSF_MSVQ_Survivors             = 6;
cannam@154:         psEncC->warping_Q16                     = psEncC->fs_kHz * SILK_FIX_CONST( WARPING_MULTIPLIER, 16 );
cannam@154:     } else if( Complexity < 8 ) {
cannam@154:         psEncC->pitchEstimationComplexity       = SILK_PE_MID_COMPLEX;
cannam@154:         psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.72, 16 );
cannam@154:         psEncC->pitchEstimationLPCOrder         = 12;
cannam@154:         psEncC->shapingLPCOrder                 = 20;
cannam@154:         psEncC->la_shape                        = 5 * psEncC->fs_kHz;
cannam@154:         psEncC->nStatesDelayedDecision          = 3;
cannam@154:         psEncC->useInterpolatedNLSFs            = 1;
cannam@154:         psEncC->NLSF_MSVQ_Survivors             = 8;
cannam@154:         psEncC->warping_Q16                     = psEncC->fs_kHz * SILK_FIX_CONST( WARPING_MULTIPLIER, 16 );
cannam@154:     } else {
cannam@154:         psEncC->pitchEstimationComplexity       = SILK_PE_MAX_COMPLEX;
cannam@154:         psEncC->pitchEstimationThreshold_Q16    = SILK_FIX_CONST( 0.7, 16 );
cannam@154:         psEncC->pitchEstimationLPCOrder         = 16;
cannam@154:         psEncC->shapingLPCOrder                 = 24;
cannam@154:         psEncC->la_shape                        = 5 * psEncC->fs_kHz;
cannam@154:         psEncC->nStatesDelayedDecision          = MAX_DEL_DEC_STATES;
cannam@154:         psEncC->useInterpolatedNLSFs            = 1;
cannam@154:         psEncC->NLSF_MSVQ_Survivors             = 16;
cannam@154:         psEncC->warping_Q16                     = psEncC->fs_kHz * SILK_FIX_CONST( WARPING_MULTIPLIER, 16 );
cannam@154:     }
cannam@154: 
cannam@154:     /* Do not allow higher pitch estimation LPC order than predict LPC order */
cannam@154:     psEncC->pitchEstimationLPCOrder = silk_min_int( psEncC->pitchEstimationLPCOrder, psEncC->predictLPCOrder );
cannam@154:     psEncC->shapeWinLength          = SUB_FRAME_LENGTH_MS * psEncC->fs_kHz + 2 * psEncC->la_shape;
cannam@154:     psEncC->Complexity              = Complexity;
cannam@154: 
cannam@154:     celt_assert( psEncC->pitchEstimationLPCOrder <= MAX_FIND_PITCH_LPC_ORDER );
cannam@154:     celt_assert( psEncC->shapingLPCOrder         <= MAX_SHAPE_LPC_ORDER      );
cannam@154:     celt_assert( psEncC->nStatesDelayedDecision  <= MAX_DEL_DEC_STATES       );
cannam@154:     celt_assert( psEncC->warping_Q16             <= 32767                    );
cannam@154:     celt_assert( psEncC->la_shape                <= LA_SHAPE_MAX             );
cannam@154:     celt_assert( psEncC->shapeWinLength          <= SHAPE_LPC_WIN_MAX        );
cannam@154: 
cannam@154:     return ret;
cannam@154: }
cannam@154: 
cannam@154: static OPUS_INLINE opus_int silk_setup_LBRR(
cannam@154:     silk_encoder_state          *psEncC,            /* I/O                      */
cannam@154:     const silk_EncControlStruct *encControl         /* I                        */
cannam@154: )
cannam@154: {
cannam@154:     opus_int   LBRR_in_previous_packet, ret = SILK_NO_ERROR;
cannam@154: 
cannam@154:     LBRR_in_previous_packet = psEncC->LBRR_enabled;
cannam@154:     psEncC->LBRR_enabled = encControl->LBRR_coded;
cannam@154:     if( psEncC->LBRR_enabled ) {
cannam@154:         /* Set gain increase for coding LBRR excitation */
cannam@154:         if( LBRR_in_previous_packet == 0 ) {
cannam@154:             /* Previous packet did not have LBRR, and was therefore coded at a higher bitrate */
cannam@154:             psEncC->LBRR_GainIncreases = 7;
cannam@154:         } else {
cannam@154:             psEncC->LBRR_GainIncreases = silk_max_int( 7 - silk_SMULWB( (opus_int32)psEncC->PacketLoss_perc, SILK_FIX_CONST( 0.4, 16 ) ), 2 );
cannam@154:         }
cannam@154:     }
cannam@154: 
cannam@154:     return ret;
cannam@154: }