| 
									
										
										
										
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										 |  |  | /***********************************************************************
 | 
					
						
							|  |  |  | Copyright (c) 2006-2011, Skype Limited. All rights reserved. | 
					
						
							|  |  |  | Redistribution and use in source and binary forms, with or without | 
					
						
							|  |  |  | modification, are permitted provided that the following conditions | 
					
						
							|  |  |  | are met: | 
					
						
							|  |  |  | - Redistributions of source code must retain the above copyright notice, | 
					
						
							|  |  |  | this list of conditions and the following disclaimer. | 
					
						
							|  |  |  | - Redistributions in binary form must reproduce the above copyright | 
					
						
							|  |  |  | notice, this list of conditions and the following disclaimer in the | 
					
						
							|  |  |  | documentation and/or other materials provided with the distribution. | 
					
						
							|  |  |  | - Neither the name of Internet Society, IETF or IETF Trust, nor the | 
					
						
							|  |  |  | names of specific contributors, may be used to endorse or promote | 
					
						
							|  |  |  | products derived from this software without specific prior written | 
					
						
							|  |  |  | permission. | 
					
						
							|  |  |  | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | 
					
						
							|  |  |  | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | 
					
						
							|  |  |  | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | 
					
						
							|  |  |  | ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE | 
					
						
							|  |  |  | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | 
					
						
							|  |  |  | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | 
					
						
							|  |  |  | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS | 
					
						
							|  |  |  | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN | 
					
						
							|  |  |  | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) | 
					
						
							|  |  |  | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | 
					
						
							|  |  |  | POSSIBILITY OF SUCH DAMAGE. | 
					
						
							|  |  |  | ***********************************************************************/ | 
					
						
							|  |  |  | 
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										 |  |  | #ifdef HAVE_CONFIG_H
 | 
					
						
							|  |  |  | #include "config.h"
 | 
					
						
							|  |  |  | #endif
 | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | #include "main_FIX.h"
 | 
					
						
							|  |  |  | #include "stack_alloc.h"
 | 
					
						
							|  |  |  | #include "tuning_parameters.h"
 | 
					
						
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										 |  |  | 
 | 
					
						
							|  |  |  | /* Low Bitrate Redundancy (LBRR) encoding. Reuse all parameters but encode with lower bitrate           */ | 
					
						
							|  |  |  | static OPUS_INLINE void silk_LBRR_encode_FIX( | 
					
						
							|  |  |  |     silk_encoder_state_FIX          *psEnc,                                 /* I/O  Pointer to Silk FIX encoder state                                           */ | 
					
						
							|  |  |  |     silk_encoder_control_FIX        *psEncCtrl,                             /* I/O  Pointer to Silk FIX encoder control struct                                  */ | 
					
						
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										 |  |  |     const opus_int32                xfw_Q3[],                               /* I    Input signal                                                                */ | 
					
						
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										 |  |  |     opus_int                        condCoding                              /* I    The type of conditional coding used so far for this frame                   */ | 
					
						
							|  |  |  | ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | void silk_encode_do_VAD_FIX( | 
					
						
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										 |  |  |     silk_encoder_state_FIX          *psEnc                                  /* I/O  Pointer to Silk FIX encoder state                                           */ | 
					
						
							| 
									
										
										
										
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										 |  |  | ) | 
					
						
							|  |  |  | { | 
					
						
							|  |  |  |     /****************************/ | 
					
						
							|  |  |  |     /* Voice Activity Detection */ | 
					
						
							|  |  |  |     /****************************/ | 
					
						
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										 |  |  |     silk_VAD_GetSA_Q8( &psEnc->sCmn, psEnc->sCmn.inputBuf + 1, psEnc->sCmn.arch ); | 
					
						
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										 |  |  | 
 | 
					
						
							|  |  |  |     /**************************************************/ | 
					
						
							|  |  |  |     /* Convert speech activity into VAD and DTX flags */ | 
					
						
							|  |  |  |     /**************************************************/ | 
					
						
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										 |  |  |     if( psEnc->sCmn.speech_activity_Q8 < SILK_FIX_CONST( SPEECH_ACTIVITY_DTX_THRES, 8 ) ) { | 
					
						
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										 |  |  |         psEnc->sCmn.indices.signalType = TYPE_NO_VOICE_ACTIVITY; | 
					
						
							|  |  |  |         psEnc->sCmn.noSpeechCounter++; | 
					
						
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										 |  |  |         if( psEnc->sCmn.noSpeechCounter < NB_SPEECH_FRAMES_BEFORE_DTX ) { | 
					
						
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										 |  |  |             psEnc->sCmn.inDTX = 0; | 
					
						
							|  |  |  |         } else if( psEnc->sCmn.noSpeechCounter > MAX_CONSECUTIVE_DTX + NB_SPEECH_FRAMES_BEFORE_DTX ) { | 
					
						
							|  |  |  |             psEnc->sCmn.noSpeechCounter = NB_SPEECH_FRAMES_BEFORE_DTX; | 
					
						
							|  |  |  |             psEnc->sCmn.inDTX           = 0; | 
					
						
							|  |  |  |         } | 
					
						
							|  |  |  |         psEnc->sCmn.VAD_flags[ psEnc->sCmn.nFramesEncoded ] = 0; | 
					
						
							|  |  |  |     } else { | 
					
						
							|  |  |  |         psEnc->sCmn.noSpeechCounter    = 0; | 
					
						
							|  |  |  |         psEnc->sCmn.inDTX              = 0; | 
					
						
							|  |  |  |         psEnc->sCmn.indices.signalType = TYPE_UNVOICED; | 
					
						
							|  |  |  |         psEnc->sCmn.VAD_flags[ psEnc->sCmn.nFramesEncoded ] = 1; | 
					
						
							|  |  |  |     } | 
					
						
							|  |  |  | } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | /****************/ | 
					
						
							|  |  |  | /* Encode frame */ | 
					
						
							|  |  |  | /****************/ | 
					
						
							|  |  |  | opus_int silk_encode_frame_FIX( | 
					
						
							|  |  |  |     silk_encoder_state_FIX          *psEnc,                                 /* I/O  Pointer to Silk FIX encoder state                                           */ | 
					
						
							|  |  |  |     opus_int32                      *pnBytesOut,                            /* O    Pointer to number of payload bytes;                                         */ | 
					
						
							|  |  |  |     ec_enc                          *psRangeEnc,                            /* I/O  compressor data structure                                                   */ | 
					
						
							|  |  |  |     opus_int                        condCoding,                             /* I    The type of conditional coding to use                                       */ | 
					
						
							|  |  |  |     opus_int                        maxBits,                                /* I    If > 0: maximum number of output bits                                       */ | 
					
						
							|  |  |  |     opus_int                        useCBR                                  /* I    Flag to force constant-bitrate operation                                    */ | 
					
						
							|  |  |  | ) | 
					
						
							|  |  |  | { | 
					
						
							|  |  |  |     silk_encoder_control_FIX sEncCtrl; | 
					
						
							|  |  |  |     opus_int     i, iter, maxIter, found_upper, found_lower, ret = 0; | 
					
						
							|  |  |  |     opus_int16   *x_frame; | 
					
						
							|  |  |  |     ec_enc       sRangeEnc_copy, sRangeEnc_copy2; | 
					
						
							|  |  |  |     silk_nsq_state sNSQ_copy, sNSQ_copy2; | 
					
						
							|  |  |  |     opus_int32   seed_copy, nBits, nBits_lower, nBits_upper, gainMult_lower, gainMult_upper; | 
					
						
							|  |  |  |     opus_int32   gainsID, gainsID_lower, gainsID_upper; | 
					
						
							|  |  |  |     opus_int16   gainMult_Q8; | 
					
						
							|  |  |  |     opus_int16   ec_prevLagIndex_copy; | 
					
						
							|  |  |  |     opus_int     ec_prevSignalType_copy; | 
					
						
							|  |  |  |     opus_int8    LastGainIndex_copy2; | 
					
						
							|  |  |  |     SAVE_STACK; | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     /* This is totally unnecessary but many compilers (including gcc) are too dumb to realise it */ | 
					
						
							|  |  |  |     LastGainIndex_copy2 = nBits_lower = nBits_upper = gainMult_lower = gainMult_upper = 0; | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     psEnc->sCmn.indices.Seed = psEnc->sCmn.frameCounter++ & 3; | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     /**************************************************************/ | 
					
						
							|  |  |  |     /* Set up Input Pointers, and insert frame in input buffer   */ | 
					
						
							|  |  |  |     /*************************************************************/ | 
					
						
							|  |  |  |     /* start of frame to encode */ | 
					
						
							|  |  |  |     x_frame = psEnc->x_buf + psEnc->sCmn.ltp_mem_length; | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     /***************************************/ | 
					
						
							|  |  |  |     /* Ensure smooth bandwidth transitions */ | 
					
						
							|  |  |  |     /***************************************/ | 
					
						
							|  |  |  |     silk_LP_variable_cutoff( &psEnc->sCmn.sLP, psEnc->sCmn.inputBuf + 1, psEnc->sCmn.frame_length ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     /*******************************************/ | 
					
						
							|  |  |  |     /* Copy new frame to front of input buffer */ | 
					
						
							|  |  |  |     /*******************************************/ | 
					
						
							|  |  |  |     silk_memcpy( x_frame + LA_SHAPE_MS * psEnc->sCmn.fs_kHz, psEnc->sCmn.inputBuf + 1, psEnc->sCmn.frame_length * sizeof( opus_int16 ) ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     if( !psEnc->sCmn.prefillFlag ) { | 
					
						
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										 |  |  |         VARDECL( opus_int32, xfw_Q3 ); | 
					
						
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										 |  |  |         VARDECL( opus_int16, res_pitch ); | 
					
						
							|  |  |  |         VARDECL( opus_uint8, ec_buf_copy ); | 
					
						
							|  |  |  |         opus_int16 *res_pitch_frame; | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |         ALLOC( res_pitch, | 
					
						
							|  |  |  |                psEnc->sCmn.la_pitch + psEnc->sCmn.frame_length | 
					
						
							|  |  |  |                    + psEnc->sCmn.ltp_mem_length, opus_int16 ); | 
					
						
							|  |  |  |         /* start of pitch LPC residual frame */ | 
					
						
							|  |  |  |         res_pitch_frame = res_pitch + psEnc->sCmn.ltp_mem_length; | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |         /*****************************************/ | 
					
						
							|  |  |  |         /* Find pitch lags, initial LPC analysis */ | 
					
						
							|  |  |  |         /*****************************************/ | 
					
						
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										 |  |  |         silk_find_pitch_lags_FIX( psEnc, &sEncCtrl, res_pitch, x_frame, psEnc->sCmn.arch ); | 
					
						
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										 |  |  | 
 | 
					
						
							|  |  |  |         /************************/ | 
					
						
							|  |  |  |         /* Noise shape analysis */ | 
					
						
							|  |  |  |         /************************/ | 
					
						
							|  |  |  |         silk_noise_shape_analysis_FIX( psEnc, &sEncCtrl, res_pitch_frame, x_frame, psEnc->sCmn.arch ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |         /***************************************************/ | 
					
						
							|  |  |  |         /* Find linear prediction coefficients (LPC + LTP) */ | 
					
						
							|  |  |  |         /***************************************************/ | 
					
						
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										 |  |  |         silk_find_pred_coefs_FIX( psEnc, &sEncCtrl, res_pitch, x_frame, condCoding ); | 
					
						
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										 |  |  | 
 | 
					
						
							|  |  |  |         /****************************************/ | 
					
						
							|  |  |  |         /* Process gains                        */ | 
					
						
							|  |  |  |         /****************************************/ | 
					
						
							|  |  |  |         silk_process_gains_FIX( psEnc, &sEncCtrl, condCoding ); | 
					
						
							|  |  |  | 
 | 
					
						
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										 |  |  |         /*****************************************/ | 
					
						
							|  |  |  |         /* Prefiltering for noise shaper         */ | 
					
						
							|  |  |  |         /*****************************************/ | 
					
						
							|  |  |  |         ALLOC( xfw_Q3, psEnc->sCmn.frame_length, opus_int32 ); | 
					
						
							|  |  |  |         silk_prefilter_FIX( psEnc, &sEncCtrl, xfw_Q3, x_frame ); | 
					
						
							|  |  |  | 
 | 
					
						
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										 |  |  |         /****************************************/ | 
					
						
							|  |  |  |         /* Low Bitrate Redundant Encoding       */ | 
					
						
							|  |  |  |         /****************************************/ | 
					
						
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										 |  |  |         silk_LBRR_encode_FIX( psEnc, &sEncCtrl, xfw_Q3, condCoding ); | 
					
						
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										 |  |  | 
 | 
					
						
							|  |  |  |         /* Loop over quantizer and entropy coding to control bitrate */ | 
					
						
							|  |  |  |         maxIter = 6; | 
					
						
							|  |  |  |         gainMult_Q8 = SILK_FIX_CONST( 1, 8 ); | 
					
						
							|  |  |  |         found_lower = 0; | 
					
						
							|  |  |  |         found_upper = 0; | 
					
						
							|  |  |  |         gainsID = silk_gains_ID( psEnc->sCmn.indices.GainsIndices, psEnc->sCmn.nb_subfr ); | 
					
						
							|  |  |  |         gainsID_lower = -1; | 
					
						
							|  |  |  |         gainsID_upper = -1; | 
					
						
							|  |  |  |         /* Copy part of the input state */ | 
					
						
							|  |  |  |         silk_memcpy( &sRangeEnc_copy, psRangeEnc, sizeof( ec_enc ) ); | 
					
						
							|  |  |  |         silk_memcpy( &sNSQ_copy, &psEnc->sCmn.sNSQ, sizeof( silk_nsq_state ) ); | 
					
						
							|  |  |  |         seed_copy = psEnc->sCmn.indices.Seed; | 
					
						
							|  |  |  |         ec_prevLagIndex_copy = psEnc->sCmn.ec_prevLagIndex; | 
					
						
							|  |  |  |         ec_prevSignalType_copy = psEnc->sCmn.ec_prevSignalType; | 
					
						
							|  |  |  |         ALLOC( ec_buf_copy, 1275, opus_uint8 ); | 
					
						
							|  |  |  |         for( iter = 0; ; iter++ ) { | 
					
						
							|  |  |  |             if( gainsID == gainsID_lower ) { | 
					
						
							|  |  |  |                 nBits = nBits_lower; | 
					
						
							|  |  |  |             } else if( gainsID == gainsID_upper ) { | 
					
						
							|  |  |  |                 nBits = nBits_upper; | 
					
						
							|  |  |  |             } else { | 
					
						
							|  |  |  |                 /* Restore part of the input state */ | 
					
						
							|  |  |  |                 if( iter > 0 ) { | 
					
						
							|  |  |  |                     silk_memcpy( psRangeEnc, &sRangeEnc_copy, sizeof( ec_enc ) ); | 
					
						
							|  |  |  |                     silk_memcpy( &psEnc->sCmn.sNSQ, &sNSQ_copy, sizeof( silk_nsq_state ) ); | 
					
						
							|  |  |  |                     psEnc->sCmn.indices.Seed = seed_copy; | 
					
						
							|  |  |  |                     psEnc->sCmn.ec_prevLagIndex = ec_prevLagIndex_copy; | 
					
						
							|  |  |  |                     psEnc->sCmn.ec_prevSignalType = ec_prevSignalType_copy; | 
					
						
							|  |  |  |                 } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |                 /*****************************************/ | 
					
						
							|  |  |  |                 /* Noise shaping quantization            */ | 
					
						
							|  |  |  |                 /*****************************************/ | 
					
						
							|  |  |  |                 if( psEnc->sCmn.nStatesDelayedDecision > 1 || psEnc->sCmn.warping_Q16 > 0 ) { | 
					
						
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										 |  |  |                     silk_NSQ_del_dec( &psEnc->sCmn, &psEnc->sCmn.sNSQ, &psEnc->sCmn.indices, xfw_Q3, psEnc->sCmn.pulses, | 
					
						
							|  |  |  |                            sEncCtrl.PredCoef_Q12[ 0 ], sEncCtrl.LTPCoef_Q14, sEncCtrl.AR2_Q13, sEncCtrl.HarmShapeGain_Q14, | 
					
						
							| 
									
										
										
										
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										 |  |  |                            sEncCtrl.Tilt_Q14, sEncCtrl.LF_shp_Q14, sEncCtrl.Gains_Q16, sEncCtrl.pitchL, sEncCtrl.Lambda_Q10, sEncCtrl.LTP_scale_Q14, | 
					
						
							|  |  |  |                            psEnc->sCmn.arch ); | 
					
						
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										 |  |  |                 } else { | 
					
						
							| 
									
										
										
										
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										 |  |  |                     silk_NSQ( &psEnc->sCmn, &psEnc->sCmn.sNSQ, &psEnc->sCmn.indices, xfw_Q3, psEnc->sCmn.pulses, | 
					
						
							|  |  |  |                             sEncCtrl.PredCoef_Q12[ 0 ], sEncCtrl.LTPCoef_Q14, sEncCtrl.AR2_Q13, sEncCtrl.HarmShapeGain_Q14, | 
					
						
							| 
									
										
										
										
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										 |  |  |                             sEncCtrl.Tilt_Q14, sEncCtrl.LF_shp_Q14, sEncCtrl.Gains_Q16, sEncCtrl.pitchL, sEncCtrl.Lambda_Q10, sEncCtrl.LTP_scale_Q14, | 
					
						
							|  |  |  |                             psEnc->sCmn.arch); | 
					
						
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										 |  |  |                 } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |                 /****************************************/ | 
					
						
							|  |  |  |                 /* Encode Parameters                    */ | 
					
						
							|  |  |  |                 /****************************************/ | 
					
						
							|  |  |  |                 silk_encode_indices( &psEnc->sCmn, psRangeEnc, psEnc->sCmn.nFramesEncoded, 0, condCoding ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |                 /****************************************/ | 
					
						
							|  |  |  |                 /* Encode Excitation Signal             */ | 
					
						
							|  |  |  |                 /****************************************/ | 
					
						
							|  |  |  |                 silk_encode_pulses( psRangeEnc, psEnc->sCmn.indices.signalType, psEnc->sCmn.indices.quantOffsetType, | 
					
						
							|  |  |  |                     psEnc->sCmn.pulses, psEnc->sCmn.frame_length ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |                 nBits = ec_tell( psRangeEnc ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |                 if( useCBR == 0 && iter == 0 && nBits <= maxBits ) { | 
					
						
							|  |  |  |                     break; | 
					
						
							|  |  |  |                 } | 
					
						
							|  |  |  |             } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |             if( iter == maxIter ) { | 
					
						
							|  |  |  |                 if( found_lower && ( gainsID == gainsID_lower || nBits > maxBits ) ) { | 
					
						
							|  |  |  |                     /* Restore output state from earlier iteration that did meet the bitrate budget */ | 
					
						
							|  |  |  |                     silk_memcpy( psRangeEnc, &sRangeEnc_copy2, sizeof( ec_enc ) ); | 
					
						
							| 
									
										
										
										
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										 |  |  |                     silk_assert( sRangeEnc_copy2.offs <= 1275 ); | 
					
						
							| 
									
										
										
										
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										 |  |  |                     silk_memcpy( psRangeEnc->buf, ec_buf_copy, sRangeEnc_copy2.offs ); | 
					
						
							|  |  |  |                     silk_memcpy( &psEnc->sCmn.sNSQ, &sNSQ_copy2, sizeof( silk_nsq_state ) ); | 
					
						
							|  |  |  |                     psEnc->sShape.LastGainIndex = LastGainIndex_copy2; | 
					
						
							|  |  |  |                 } | 
					
						
							|  |  |  |                 break; | 
					
						
							|  |  |  |             } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |             if( nBits > maxBits ) { | 
					
						
							|  |  |  |                 if( found_lower == 0 && iter >= 2 ) { | 
					
						
							|  |  |  |                     /* Adjust the quantizer's rate/distortion tradeoff and discard previous "upper" results */ | 
					
						
							|  |  |  |                     sEncCtrl.Lambda_Q10 = silk_ADD_RSHIFT32( sEncCtrl.Lambda_Q10, sEncCtrl.Lambda_Q10, 1 ); | 
					
						
							|  |  |  |                     found_upper = 0; | 
					
						
							|  |  |  |                     gainsID_upper = -1; | 
					
						
							|  |  |  |                 } else { | 
					
						
							|  |  |  |                     found_upper = 1; | 
					
						
							|  |  |  |                     nBits_upper = nBits; | 
					
						
							|  |  |  |                     gainMult_upper = gainMult_Q8; | 
					
						
							|  |  |  |                     gainsID_upper = gainsID; | 
					
						
							|  |  |  |                 } | 
					
						
							|  |  |  |             } else if( nBits < maxBits - 5 ) { | 
					
						
							|  |  |  |                 found_lower = 1; | 
					
						
							|  |  |  |                 nBits_lower = nBits; | 
					
						
							|  |  |  |                 gainMult_lower = gainMult_Q8; | 
					
						
							|  |  |  |                 if( gainsID != gainsID_lower ) { | 
					
						
							|  |  |  |                     gainsID_lower = gainsID; | 
					
						
							|  |  |  |                     /* Copy part of the output state */ | 
					
						
							|  |  |  |                     silk_memcpy( &sRangeEnc_copy2, psRangeEnc, sizeof( ec_enc ) ); | 
					
						
							| 
									
										
										
										
											2019-11-18 09:56:18 +01:00
										 |  |  |                     silk_assert( psRangeEnc->offs <= 1275 ); | 
					
						
							| 
									
										
										
										
											2015-10-02 14:20:50 -03:00
										 |  |  |                     silk_memcpy( ec_buf_copy, psRangeEnc->buf, psRangeEnc->offs ); | 
					
						
							|  |  |  |                     silk_memcpy( &sNSQ_copy2, &psEnc->sCmn.sNSQ, sizeof( silk_nsq_state ) ); | 
					
						
							|  |  |  |                     LastGainIndex_copy2 = psEnc->sShape.LastGainIndex; | 
					
						
							|  |  |  |                 } | 
					
						
							|  |  |  |             } else { | 
					
						
							|  |  |  |                 /* Within 5 bits of budget: close enough */ | 
					
						
							|  |  |  |                 break; | 
					
						
							|  |  |  |             } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |             if( ( found_lower & found_upper ) == 0 ) { | 
					
						
							|  |  |  |                 /* Adjust gain according to high-rate rate/distortion curve */ | 
					
						
							| 
									
										
										
										
											2019-11-18 09:56:18 +01:00
										 |  |  |                 opus_int32 gain_factor_Q16; | 
					
						
							|  |  |  |                 gain_factor_Q16 = silk_log2lin( silk_LSHIFT( nBits - maxBits, 7 ) / psEnc->sCmn.frame_length + SILK_FIX_CONST( 16, 7 ) ); | 
					
						
							|  |  |  |                 gain_factor_Q16 = silk_min_32( gain_factor_Q16, SILK_FIX_CONST( 2, 16 ) ); | 
					
						
							| 
									
										
										
										
											2015-10-02 14:20:50 -03:00
										 |  |  |                 if( nBits > maxBits ) { | 
					
						
							| 
									
										
										
										
											2019-11-18 09:56:18 +01:00
										 |  |  |                     gain_factor_Q16 = silk_max_32( gain_factor_Q16, SILK_FIX_CONST( 1.3, 16 ) ); | 
					
						
							| 
									
										
										
										
											2015-10-02 14:20:50 -03:00
										 |  |  |                 } | 
					
						
							| 
									
										
										
										
											2019-11-18 09:56:18 +01:00
										 |  |  |                 gainMult_Q8 = silk_SMULWB( gain_factor_Q16, gainMult_Q8 ); | 
					
						
							| 
									
										
										
										
											2015-10-02 14:20:50 -03:00
										 |  |  |             } else { | 
					
						
							|  |  |  |                 /* Adjust gain by interpolating */ | 
					
						
							|  |  |  |                 gainMult_Q8 = gainMult_lower + silk_DIV32_16( silk_MUL( gainMult_upper - gainMult_lower, maxBits - nBits_lower ), nBits_upper - nBits_lower ); | 
					
						
							|  |  |  |                 /* New gain multplier must be between 25% and 75% of old range (note that gainMult_upper < gainMult_lower) */ | 
					
						
							|  |  |  |                 if( gainMult_Q8 > silk_ADD_RSHIFT32( gainMult_lower, gainMult_upper - gainMult_lower, 2 ) ) { | 
					
						
							|  |  |  |                     gainMult_Q8 = silk_ADD_RSHIFT32( gainMult_lower, gainMult_upper - gainMult_lower, 2 ); | 
					
						
							|  |  |  |                 } else | 
					
						
							|  |  |  |                 if( gainMult_Q8 < silk_SUB_RSHIFT32( gainMult_upper, gainMult_upper - gainMult_lower, 2 ) ) { | 
					
						
							|  |  |  |                     gainMult_Q8 = silk_SUB_RSHIFT32( gainMult_upper, gainMult_upper - gainMult_lower, 2 ); | 
					
						
							|  |  |  |                 } | 
					
						
							|  |  |  |             } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |             for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) { | 
					
						
							| 
									
										
										
										
											2019-11-18 09:56:18 +01:00
										 |  |  |                 sEncCtrl.Gains_Q16[ i ] = silk_LSHIFT_SAT32( silk_SMULWB( sEncCtrl.GainsUnq_Q16[ i ], gainMult_Q8 ), 8 ); | 
					
						
							| 
									
										
										
										
											2015-10-02 14:20:50 -03:00
										 |  |  |             } | 
					
						
							| 
									
										
										
										
											2016-05-01 12:48:46 -03:00
										 |  |  | 
 | 
					
						
							| 
									
										
										
										
											2015-10-02 14:20:50 -03:00
										 |  |  |             /* Quantize gains */ | 
					
						
							|  |  |  |             psEnc->sShape.LastGainIndex = sEncCtrl.lastGainIndexPrev; | 
					
						
							|  |  |  |             silk_gains_quant( psEnc->sCmn.indices.GainsIndices, sEncCtrl.Gains_Q16, | 
					
						
							|  |  |  |                   &psEnc->sShape.LastGainIndex, condCoding == CODE_CONDITIONALLY, psEnc->sCmn.nb_subfr ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |             /* Unique identifier of gains vector */ | 
					
						
							|  |  |  |             gainsID = silk_gains_ID( psEnc->sCmn.indices.GainsIndices, psEnc->sCmn.nb_subfr ); | 
					
						
							|  |  |  |         } | 
					
						
							|  |  |  |     } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     /* Update input buffer */ | 
					
						
							|  |  |  |     silk_memmove( psEnc->x_buf, &psEnc->x_buf[ psEnc->sCmn.frame_length ], | 
					
						
							|  |  |  |         ( psEnc->sCmn.ltp_mem_length + LA_SHAPE_MS * psEnc->sCmn.fs_kHz ) * sizeof( opus_int16 ) ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     /* Exit without entropy coding */ | 
					
						
							|  |  |  |     if( psEnc->sCmn.prefillFlag ) { | 
					
						
							|  |  |  |         /* No payload */ | 
					
						
							|  |  |  |         *pnBytesOut = 0; | 
					
						
							|  |  |  |         RESTORE_STACK; | 
					
						
							|  |  |  |         return ret; | 
					
						
							|  |  |  |     } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     /* Parameters needed for next frame */ | 
					
						
							|  |  |  |     psEnc->sCmn.prevLag        = sEncCtrl.pitchL[ psEnc->sCmn.nb_subfr - 1 ]; | 
					
						
							|  |  |  |     psEnc->sCmn.prevSignalType = psEnc->sCmn.indices.signalType; | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     /****************************************/ | 
					
						
							|  |  |  |     /* Finalize payload                     */ | 
					
						
							|  |  |  |     /****************************************/ | 
					
						
							|  |  |  |     psEnc->sCmn.first_frame_after_reset = 0; | 
					
						
							|  |  |  |     /* Payload size */ | 
					
						
							|  |  |  |     *pnBytesOut = silk_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     RESTORE_STACK; | 
					
						
							|  |  |  |     return ret; | 
					
						
							|  |  |  | } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  | /* Low-Bitrate Redundancy (LBRR) encoding. Reuse all parameters but encode excitation at lower bitrate  */ | 
					
						
							|  |  |  | static OPUS_INLINE void silk_LBRR_encode_FIX( | 
					
						
							|  |  |  |     silk_encoder_state_FIX          *psEnc,                                 /* I/O  Pointer to Silk FIX encoder state                                           */ | 
					
						
							|  |  |  |     silk_encoder_control_FIX        *psEncCtrl,                             /* I/O  Pointer to Silk FIX encoder control struct                                  */ | 
					
						
							| 
									
										
										
										
											2019-11-18 09:56:18 +01:00
										 |  |  |     const opus_int32                xfw_Q3[],                               /* I    Input signal                                                                */ | 
					
						
							| 
									
										
										
										
											2015-10-02 14:20:50 -03:00
										 |  |  |     opus_int                        condCoding                              /* I    The type of conditional coding used so far for this frame                   */ | 
					
						
							|  |  |  | ) | 
					
						
							|  |  |  | { | 
					
						
							|  |  |  |     opus_int32   TempGains_Q16[ MAX_NB_SUBFR ]; | 
					
						
							|  |  |  |     SideInfoIndices *psIndices_LBRR = &psEnc->sCmn.indices_LBRR[ psEnc->sCmn.nFramesEncoded ]; | 
					
						
							|  |  |  |     silk_nsq_state sNSQ_LBRR; | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |     /*******************************************/ | 
					
						
							|  |  |  |     /* Control use of inband LBRR              */ | 
					
						
							|  |  |  |     /*******************************************/ | 
					
						
							|  |  |  |     if( psEnc->sCmn.LBRR_enabled && psEnc->sCmn.speech_activity_Q8 > SILK_FIX_CONST( LBRR_SPEECH_ACTIVITY_THRES, 8 ) ) { | 
					
						
							|  |  |  |         psEnc->sCmn.LBRR_flags[ psEnc->sCmn.nFramesEncoded ] = 1; | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |         /* Copy noise shaping quantizer state and quantization indices from regular encoding */ | 
					
						
							|  |  |  |         silk_memcpy( &sNSQ_LBRR, &psEnc->sCmn.sNSQ, sizeof( silk_nsq_state ) ); | 
					
						
							|  |  |  |         silk_memcpy( psIndices_LBRR, &psEnc->sCmn.indices, sizeof( SideInfoIndices ) ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |         /* Save original gains */ | 
					
						
							|  |  |  |         silk_memcpy( TempGains_Q16, psEncCtrl->Gains_Q16, psEnc->sCmn.nb_subfr * sizeof( opus_int32 ) ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |         if( psEnc->sCmn.nFramesEncoded == 0 || psEnc->sCmn.LBRR_flags[ psEnc->sCmn.nFramesEncoded - 1 ] == 0 ) { | 
					
						
							|  |  |  |             /* First frame in packet or previous frame not LBRR coded */ | 
					
						
							|  |  |  |             psEnc->sCmn.LBRRprevLastGainIndex = psEnc->sShape.LastGainIndex; | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |             /* Increase Gains to get target LBRR rate */ | 
					
						
							|  |  |  |             psIndices_LBRR->GainsIndices[ 0 ] = psIndices_LBRR->GainsIndices[ 0 ] + psEnc->sCmn.LBRR_GainIncreases; | 
					
						
							|  |  |  |             psIndices_LBRR->GainsIndices[ 0 ] = silk_min_int( psIndices_LBRR->GainsIndices[ 0 ], N_LEVELS_QGAIN - 1 ); | 
					
						
							|  |  |  |         } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |         /* Decode to get gains in sync with decoder         */ | 
					
						
							|  |  |  |         /* Overwrite unquantized gains with quantized gains */ | 
					
						
							|  |  |  |         silk_gains_dequant( psEncCtrl->Gains_Q16, psIndices_LBRR->GainsIndices, | 
					
						
							|  |  |  |             &psEnc->sCmn.LBRRprevLastGainIndex, condCoding == CODE_CONDITIONALLY, psEnc->sCmn.nb_subfr ); | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |         /*****************************************/ | 
					
						
							|  |  |  |         /* Noise shaping quantization            */ | 
					
						
							|  |  |  |         /*****************************************/ | 
					
						
							|  |  |  |         if( psEnc->sCmn.nStatesDelayedDecision > 1 || psEnc->sCmn.warping_Q16 > 0 ) { | 
					
						
							| 
									
										
										
										
											2019-11-18 09:56:18 +01:00
										 |  |  |             silk_NSQ_del_dec( &psEnc->sCmn, &sNSQ_LBRR, psIndices_LBRR, xfw_Q3, | 
					
						
							| 
									
										
										
										
											2015-10-02 14:20:50 -03:00
										 |  |  |                 psEnc->sCmn.pulses_LBRR[ psEnc->sCmn.nFramesEncoded ], psEncCtrl->PredCoef_Q12[ 0 ], psEncCtrl->LTPCoef_Q14, | 
					
						
							| 
									
										
										
										
											2019-11-18 09:56:18 +01:00
										 |  |  |                 psEncCtrl->AR2_Q13, psEncCtrl->HarmShapeGain_Q14, psEncCtrl->Tilt_Q14, psEncCtrl->LF_shp_Q14, | 
					
						
							| 
									
										
										
										
											2016-05-01 12:48:46 -03:00
										 |  |  |                 psEncCtrl->Gains_Q16, psEncCtrl->pitchL, psEncCtrl->Lambda_Q10, psEncCtrl->LTP_scale_Q14, psEnc->sCmn.arch ); | 
					
						
							| 
									
										
										
										
											2015-10-02 14:20:50 -03:00
										 |  |  |         } else { | 
					
						
							| 
									
										
										
										
											2019-11-18 09:56:18 +01:00
										 |  |  |             silk_NSQ( &psEnc->sCmn, &sNSQ_LBRR, psIndices_LBRR, xfw_Q3, | 
					
						
							| 
									
										
										
										
											2015-10-02 14:20:50 -03:00
										 |  |  |                 psEnc->sCmn.pulses_LBRR[ psEnc->sCmn.nFramesEncoded ], psEncCtrl->PredCoef_Q12[ 0 ], psEncCtrl->LTPCoef_Q14, | 
					
						
							| 
									
										
										
										
											2019-11-18 09:56:18 +01:00
										 |  |  |                 psEncCtrl->AR2_Q13, psEncCtrl->HarmShapeGain_Q14, psEncCtrl->Tilt_Q14, psEncCtrl->LF_shp_Q14, | 
					
						
							| 
									
										
										
										
											2016-05-01 12:48:46 -03:00
										 |  |  |                 psEncCtrl->Gains_Q16, psEncCtrl->pitchL, psEncCtrl->Lambda_Q10, psEncCtrl->LTP_scale_Q14, psEnc->sCmn.arch ); | 
					
						
							| 
									
										
										
										
											2015-10-02 14:20:50 -03:00
										 |  |  |         } | 
					
						
							|  |  |  | 
 | 
					
						
							|  |  |  |         /* Restore original gains */ | 
					
						
							|  |  |  |         silk_memcpy( psEncCtrl->Gains_Q16, TempGains_Q16, psEnc->sCmn.nb_subfr * sizeof( opus_int32 ) ); | 
					
						
							|  |  |  |     } | 
					
						
							|  |  |  | } |