diff options
Diffstat (limited to 'drivers/opus/silk/enc_API.c')
| -rw-r--r-- | drivers/opus/silk/enc_API.c | 560 |
1 files changed, 0 insertions, 560 deletions
diff --git a/drivers/opus/silk/enc_API.c b/drivers/opus/silk/enc_API.c deleted file mode 100644 index beb46214d8..0000000000 --- a/drivers/opus/silk/enc_API.c +++ /dev/null @@ -1,560 +0,0 @@ -/*********************************************************************** -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. -***********************************************************************/ -#include "opus/opus_config.h" -#include "opus/silk/define.h" -#include "opus/silk/API.h" -#include "opus/silk/control.h" -#include "opus/silk/typedef.h" -#include "opus/celt/stack_alloc.h" -#include "opus/silk/structs.h" -#include "opus/silk/tuning_parameters.h" -#ifdef OPUS_FIXED_POINT -#include "opus/silk/fixed/main_FIX.h" -#else -#include "opus/silk/float/main_FLP.h" -#endif - -/***************************************/ -/* Read control structure from encoder */ -/***************************************/ -static opus_int silk_QueryEncoder( /* O Returns error code */ - const void *encState, /* I State */ - silk_EncControlStruct *encStatus /* O Encoder Status */ -); - -/****************************************/ -/* Encoder functions */ -/****************************************/ - -opus_int silk_Get_Encoder_Size( /* O Returns error code */ - opus_int *encSizeBytes /* O Number of bytes in SILK encoder state */ -) -{ - opus_int ret = SILK_NO_ERROR; - - *encSizeBytes = sizeof( silk_encoder ); - - return ret; -} - -/*************************/ -/* Init or Reset encoder */ -/*************************/ -opus_int silk_InitEncoder( /* O Returns error code */ - void *encState, /* I/O State */ - int arch, /* I Run-time architecture */ - silk_EncControlStruct *encStatus /* O Encoder Status */ -) -{ - silk_encoder *psEnc; - opus_int n, ret = SILK_NO_ERROR; - - psEnc = (silk_encoder *)encState; - - /* Reset encoder */ - silk_memset( psEnc, 0, sizeof( silk_encoder ) ); - for( n = 0; n < ENCODER_NUM_CHANNELS; n++ ) { - if( ret += silk_init_encoder( &psEnc->state_Fxx[ n ], arch ) ) { - silk_assert( 0 ); - } - } - - psEnc->nChannelsAPI = 1; - psEnc->nChannelsInternal = 1; - - /* Read control structure */ - if( ret += silk_QueryEncoder( encState, encStatus ) ) { - silk_assert( 0 ); - } - - return ret; -} - -/***************************************/ -/* Read control structure from encoder */ -/***************************************/ -static opus_int silk_QueryEncoder( /* O Returns error code */ - const void *encState, /* I State */ - silk_EncControlStruct *encStatus /* O Encoder Status */ -) -{ - opus_int ret = SILK_NO_ERROR; - silk_encoder_state_Fxx *state_Fxx; - silk_encoder *psEnc = (silk_encoder *)encState; - - state_Fxx = psEnc->state_Fxx; - - encStatus->nChannelsAPI = psEnc->nChannelsAPI; - encStatus->nChannelsInternal = psEnc->nChannelsInternal; - encStatus->API_sampleRate = state_Fxx[ 0 ].sCmn.API_fs_Hz; - encStatus->maxInternalSampleRate = state_Fxx[ 0 ].sCmn.maxInternal_fs_Hz; - encStatus->minInternalSampleRate = state_Fxx[ 0 ].sCmn.minInternal_fs_Hz; - encStatus->desiredInternalSampleRate = state_Fxx[ 0 ].sCmn.desiredInternal_fs_Hz; - encStatus->payloadSize_ms = state_Fxx[ 0 ].sCmn.PacketSize_ms; - encStatus->bitRate = state_Fxx[ 0 ].sCmn.TargetRate_bps; - encStatus->packetLossPercentage = state_Fxx[ 0 ].sCmn.PacketLoss_perc; - encStatus->complexity = state_Fxx[ 0 ].sCmn.Complexity; - encStatus->useInBandFEC = state_Fxx[ 0 ].sCmn.useInBandFEC; - encStatus->useDTX = state_Fxx[ 0 ].sCmn.useDTX; - encStatus->useCBR = state_Fxx[ 0 ].sCmn.useCBR; - encStatus->internalSampleRate = silk_SMULBB( state_Fxx[ 0 ].sCmn.fs_kHz, 1000 ); - encStatus->allowBandwidthSwitch = state_Fxx[ 0 ].sCmn.allow_bandwidth_switch; - encStatus->inWBmodeWithoutVariableLP = state_Fxx[ 0 ].sCmn.fs_kHz == 16 && state_Fxx[ 0 ].sCmn.sLP.mode == 0; - - return ret; -} - - -/**************************/ -/* Encode frame with Silk */ -/**************************/ -/* Note: if prefillFlag is set, the input must contain 10 ms of audio, irrespective of what */ -/* encControl->payloadSize_ms is set to */ -opus_int silk_Encode( /* O Returns error code */ - void *encState, /* I/O State */ - silk_EncControlStruct *encControl, /* I Control status */ - const opus_int16 *samplesIn, /* I Speech sample input vector */ - opus_int nSamplesIn, /* I Number of samples in input vector */ - ec_enc *psRangeEnc, /* I/O Compressor data structure */ - opus_int32 *nBytesOut, /* I/O Number of bytes in payload (input: Max bytes) */ - const opus_int prefillFlag /* I Flag to indicate prefilling buffers no coding */ -) -{ - opus_int n, i, nBits, flags, tmp_payloadSize_ms = 0, tmp_complexity = 0, ret = 0; - opus_int nSamplesToBuffer, nSamplesToBufferMax, nBlocksOf10ms; - opus_int nSamplesFromInput = 0, nSamplesFromInputMax; - opus_int speech_act_thr_for_switch_Q8; - opus_int32 TargetRate_bps, MStargetRates_bps[ 2 ], channelRate_bps, LBRR_symbol, sum; - silk_encoder *psEnc = ( silk_encoder * )encState; - VARDECL( opus_int16, buf ); - opus_int transition, curr_block, tot_blocks; - SAVE_STACK; - - if (encControl->reducedDependency) - { - psEnc->state_Fxx[0].sCmn.first_frame_after_reset = 1; - psEnc->state_Fxx[1].sCmn.first_frame_after_reset = 1; - } - psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded = psEnc->state_Fxx[ 1 ].sCmn.nFramesEncoded = 0; - - /* Check values in encoder control structure */ - if( ( ret = check_control_input( encControl ) ) != 0 ) { - silk_assert( 0 ); - RESTORE_STACK; - return ret; - } - - encControl->switchReady = 0; - - if( encControl->nChannelsInternal > psEnc->nChannelsInternal ) { - /* Mono -> Stereo transition: init state of second channel and stereo state */ - ret += silk_init_encoder( &psEnc->state_Fxx[ 1 ], psEnc->state_Fxx[ 0 ].sCmn.arch ); - silk_memset( psEnc->sStereo.pred_prev_Q13, 0, sizeof( psEnc->sStereo.pred_prev_Q13 ) ); - silk_memset( psEnc->sStereo.sSide, 0, sizeof( psEnc->sStereo.sSide ) ); - psEnc->sStereo.mid_side_amp_Q0[ 0 ] = 0; - psEnc->sStereo.mid_side_amp_Q0[ 1 ] = 1; - psEnc->sStereo.mid_side_amp_Q0[ 2 ] = 0; - psEnc->sStereo.mid_side_amp_Q0[ 3 ] = 1; - psEnc->sStereo.width_prev_Q14 = 0; - psEnc->sStereo.smth_width_Q14 = SILK_FIX_CONST( 1, 14 ); - if( psEnc->nChannelsAPI == 2 ) { - silk_memcpy( &psEnc->state_Fxx[ 1 ].sCmn.resampler_state, &psEnc->state_Fxx[ 0 ].sCmn.resampler_state, sizeof( silk_resampler_state_struct ) ); - silk_memcpy( &psEnc->state_Fxx[ 1 ].sCmn.In_HP_State, &psEnc->state_Fxx[ 0 ].sCmn.In_HP_State, sizeof( psEnc->state_Fxx[ 1 ].sCmn.In_HP_State ) ); - } - } - - transition = (encControl->payloadSize_ms != psEnc->state_Fxx[ 0 ].sCmn.PacketSize_ms) || (psEnc->nChannelsInternal != encControl->nChannelsInternal); - - psEnc->nChannelsAPI = encControl->nChannelsAPI; - psEnc->nChannelsInternal = encControl->nChannelsInternal; - - nBlocksOf10ms = silk_DIV32( 100 * nSamplesIn, encControl->API_sampleRate ); - tot_blocks = ( nBlocksOf10ms > 1 ) ? nBlocksOf10ms >> 1 : 1; - curr_block = 0; - if( prefillFlag ) { - /* Only accept input length of 10 ms */ - if( nBlocksOf10ms != 1 ) { - silk_assert( 0 ); - RESTORE_STACK; - return SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES; - } - /* Reset Encoder */ - for( n = 0; n < encControl->nChannelsInternal; n++ ) { - ret = silk_init_encoder( &psEnc->state_Fxx[ n ], psEnc->state_Fxx[ n ].sCmn.arch ); - silk_assert( !ret ); - } - tmp_payloadSize_ms = encControl->payloadSize_ms; - encControl->payloadSize_ms = 10; - tmp_complexity = encControl->complexity; - encControl->complexity = 0; - for( n = 0; n < encControl->nChannelsInternal; n++ ) { - psEnc->state_Fxx[ n ].sCmn.controlled_since_last_payload = 0; - psEnc->state_Fxx[ n ].sCmn.prefillFlag = 1; - } - } else { - /* Only accept input lengths that are a multiple of 10 ms */ - if( nBlocksOf10ms * encControl->API_sampleRate != 100 * nSamplesIn || nSamplesIn < 0 ) { - silk_assert( 0 ); - RESTORE_STACK; - return SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES; - } - /* Make sure no more than one packet can be produced */ - if( 1000 * (opus_int32)nSamplesIn > encControl->payloadSize_ms * encControl->API_sampleRate ) { - silk_assert( 0 ); - RESTORE_STACK; - return SILK_ENC_INPUT_INVALID_NO_OF_SAMPLES; - } - } - - TargetRate_bps = silk_RSHIFT32( encControl->bitRate, encControl->nChannelsInternal - 1 ); - for( n = 0; n < encControl->nChannelsInternal; n++ ) { - /* Force the side channel to the same rate as the mid */ - opus_int force_fs_kHz = (n==1) ? psEnc->state_Fxx[0].sCmn.fs_kHz : 0; - if( ( ret = silk_control_encoder( &psEnc->state_Fxx[ n ], encControl, TargetRate_bps, psEnc->allowBandwidthSwitch, n, force_fs_kHz ) ) != 0 ) { - silk_assert( 0 ); - RESTORE_STACK; - return ret; - } - if( psEnc->state_Fxx[n].sCmn.first_frame_after_reset || transition ) { - for( i = 0; i < psEnc->state_Fxx[ 0 ].sCmn.nFramesPerPacket; i++ ) { - psEnc->state_Fxx[ n ].sCmn.LBRR_flags[ i ] = 0; - } - } - psEnc->state_Fxx[ n ].sCmn.inDTX = psEnc->state_Fxx[ n ].sCmn.useDTX; - } - silk_assert( encControl->nChannelsInternal == 1 || psEnc->state_Fxx[ 0 ].sCmn.fs_kHz == psEnc->state_Fxx[ 1 ].sCmn.fs_kHz ); - - /* Input buffering/resampling and encoding */ - nSamplesToBufferMax = - 10 * nBlocksOf10ms * psEnc->state_Fxx[ 0 ].sCmn.fs_kHz; - nSamplesFromInputMax = - silk_DIV32_16( nSamplesToBufferMax * - psEnc->state_Fxx[ 0 ].sCmn.API_fs_Hz, - psEnc->state_Fxx[ 0 ].sCmn.fs_kHz * 1000 ); - ALLOC( buf, nSamplesFromInputMax, opus_int16 ); - while( 1 ) { - nSamplesToBuffer = psEnc->state_Fxx[ 0 ].sCmn.frame_length - psEnc->state_Fxx[ 0 ].sCmn.inputBufIx; - nSamplesToBuffer = silk_min( nSamplesToBuffer, nSamplesToBufferMax ); - nSamplesFromInput = silk_DIV32_16( nSamplesToBuffer * psEnc->state_Fxx[ 0 ].sCmn.API_fs_Hz, psEnc->state_Fxx[ 0 ].sCmn.fs_kHz * 1000 ); - /* Resample and write to buffer */ - if( encControl->nChannelsAPI == 2 && encControl->nChannelsInternal == 2 ) { - opus_int id = psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded; - for( n = 0; n < nSamplesFromInput; n++ ) { - buf[ n ] = samplesIn[ 2 * n ]; - } - /* Making sure to start both resamplers from the same state when switching from mono to stereo */ - if( psEnc->nPrevChannelsInternal == 1 && id==0 ) { - silk_memcpy( &psEnc->state_Fxx[ 1 ].sCmn.resampler_state, &psEnc->state_Fxx[ 0 ].sCmn.resampler_state, sizeof(psEnc->state_Fxx[ 1 ].sCmn.resampler_state)); - } - - ret += silk_resampler( &psEnc->state_Fxx[ 0 ].sCmn.resampler_state, - &psEnc->state_Fxx[ 0 ].sCmn.inputBuf[ psEnc->state_Fxx[ 0 ].sCmn.inputBufIx + 2 ], buf, nSamplesFromInput ); - psEnc->state_Fxx[ 0 ].sCmn.inputBufIx += nSamplesToBuffer; - - nSamplesToBuffer = psEnc->state_Fxx[ 1 ].sCmn.frame_length - psEnc->state_Fxx[ 1 ].sCmn.inputBufIx; - nSamplesToBuffer = silk_min( nSamplesToBuffer, 10 * nBlocksOf10ms * psEnc->state_Fxx[ 1 ].sCmn.fs_kHz ); - for( n = 0; n < nSamplesFromInput; n++ ) { - buf[ n ] = samplesIn[ 2 * n + 1 ]; - } - ret += silk_resampler( &psEnc->state_Fxx[ 1 ].sCmn.resampler_state, - &psEnc->state_Fxx[ 1 ].sCmn.inputBuf[ psEnc->state_Fxx[ 1 ].sCmn.inputBufIx + 2 ], buf, nSamplesFromInput ); - - psEnc->state_Fxx[ 1 ].sCmn.inputBufIx += nSamplesToBuffer; - } else if( encControl->nChannelsAPI == 2 && encControl->nChannelsInternal == 1 ) { - /* Combine left and right channels before resampling */ - for( n = 0; n < nSamplesFromInput; n++ ) { - sum = samplesIn[ 2 * n ] + samplesIn[ 2 * n + 1 ]; - buf[ n ] = (opus_int16)silk_RSHIFT_ROUND( sum, 1 ); - } - ret += silk_resampler( &psEnc->state_Fxx[ 0 ].sCmn.resampler_state, - &psEnc->state_Fxx[ 0 ].sCmn.inputBuf[ psEnc->state_Fxx[ 0 ].sCmn.inputBufIx + 2 ], buf, nSamplesFromInput ); - /* On the first mono frame, average the results for the two resampler states */ - if( psEnc->nPrevChannelsInternal == 2 && psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded == 0 ) { - ret += silk_resampler( &psEnc->state_Fxx[ 1 ].sCmn.resampler_state, - &psEnc->state_Fxx[ 1 ].sCmn.inputBuf[ psEnc->state_Fxx[ 1 ].sCmn.inputBufIx + 2 ], buf, nSamplesFromInput ); - for( n = 0; n < psEnc->state_Fxx[ 0 ].sCmn.frame_length; n++ ) { - psEnc->state_Fxx[ 0 ].sCmn.inputBuf[ psEnc->state_Fxx[ 0 ].sCmn.inputBufIx+n+2 ] = - silk_RSHIFT(psEnc->state_Fxx[ 0 ].sCmn.inputBuf[ psEnc->state_Fxx[ 0 ].sCmn.inputBufIx+n+2 ] - + psEnc->state_Fxx[ 1 ].sCmn.inputBuf[ psEnc->state_Fxx[ 1 ].sCmn.inputBufIx+n+2 ], 1); - } - } - psEnc->state_Fxx[ 0 ].sCmn.inputBufIx += nSamplesToBuffer; - } else { - silk_assert( encControl->nChannelsAPI == 1 && encControl->nChannelsInternal == 1 ); - silk_memcpy(buf, samplesIn, nSamplesFromInput*sizeof(opus_int16)); - ret += silk_resampler( &psEnc->state_Fxx[ 0 ].sCmn.resampler_state, - &psEnc->state_Fxx[ 0 ].sCmn.inputBuf[ psEnc->state_Fxx[ 0 ].sCmn.inputBufIx + 2 ], buf, nSamplesFromInput ); - psEnc->state_Fxx[ 0 ].sCmn.inputBufIx += nSamplesToBuffer; - } - - samplesIn += nSamplesFromInput * encControl->nChannelsAPI; - nSamplesIn -= nSamplesFromInput; - - /* Default */ - psEnc->allowBandwidthSwitch = 0; - - /* Silk encoder */ - if( psEnc->state_Fxx[ 0 ].sCmn.inputBufIx >= psEnc->state_Fxx[ 0 ].sCmn.frame_length ) { - /* Enough data in input buffer, so encode */ - silk_assert( psEnc->state_Fxx[ 0 ].sCmn.inputBufIx == psEnc->state_Fxx[ 0 ].sCmn.frame_length ); - silk_assert( encControl->nChannelsInternal == 1 || psEnc->state_Fxx[ 1 ].sCmn.inputBufIx == psEnc->state_Fxx[ 1 ].sCmn.frame_length ); - - /* Deal with LBRR data */ - if( psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded == 0 && !prefillFlag ) { - /* Create space at start of payload for VAD and FEC flags */ - opus_uint8 iCDF[ 2 ] = { 0, 0 }; - iCDF[ 0 ] = 256 - silk_RSHIFT( 256, ( psEnc->state_Fxx[ 0 ].sCmn.nFramesPerPacket + 1 ) * encControl->nChannelsInternal ); - ec_enc_icdf( psRangeEnc, 0, iCDF, 8 ); - - /* Encode any LBRR data from previous packet */ - /* Encode LBRR flags */ - for( n = 0; n < encControl->nChannelsInternal; n++ ) { - LBRR_symbol = 0; - for( i = 0; i < psEnc->state_Fxx[ n ].sCmn.nFramesPerPacket; i++ ) { - LBRR_symbol |= silk_LSHIFT( psEnc->state_Fxx[ n ].sCmn.LBRR_flags[ i ], i ); - } - psEnc->state_Fxx[ n ].sCmn.LBRR_flag = LBRR_symbol > 0 ? 1 : 0; - if( LBRR_symbol && psEnc->state_Fxx[ n ].sCmn.nFramesPerPacket > 1 ) { - ec_enc_icdf( psRangeEnc, LBRR_symbol - 1, silk_LBRR_flags_iCDF_ptr[ psEnc->state_Fxx[ n ].sCmn.nFramesPerPacket - 2 ], 8 ); - } - } - - /* Code LBRR indices and excitation signals */ - for( i = 0; i < psEnc->state_Fxx[ 0 ].sCmn.nFramesPerPacket; i++ ) { - for( n = 0; n < encControl->nChannelsInternal; n++ ) { - if( psEnc->state_Fxx[ n ].sCmn.LBRR_flags[ i ] ) { - opus_int condCoding; - - if( encControl->nChannelsInternal == 2 && n == 0 ) { - silk_stereo_encode_pred( psRangeEnc, psEnc->sStereo.predIx[ i ] ); - /* For LBRR data there's no need to code the mid-only flag if the side-channel LBRR flag is set */ - if( psEnc->state_Fxx[ 1 ].sCmn.LBRR_flags[ i ] == 0 ) { - silk_stereo_encode_mid_only( psRangeEnc, psEnc->sStereo.mid_only_flags[ i ] ); - } - } - /* Use conditional coding if previous frame available */ - if( i > 0 && psEnc->state_Fxx[ n ].sCmn.LBRR_flags[ i - 1 ] ) { - condCoding = CODE_CONDITIONALLY; - } else { - condCoding = CODE_INDEPENDENTLY; - } - silk_encode_indices( &psEnc->state_Fxx[ n ].sCmn, psRangeEnc, i, 1, condCoding ); - silk_encode_pulses( psRangeEnc, psEnc->state_Fxx[ n ].sCmn.indices_LBRR[i].signalType, psEnc->state_Fxx[ n ].sCmn.indices_LBRR[i].quantOffsetType, - psEnc->state_Fxx[ n ].sCmn.pulses_LBRR[ i ], psEnc->state_Fxx[ n ].sCmn.frame_length ); - } - } - } - - /* Reset LBRR flags */ - for( n = 0; n < encControl->nChannelsInternal; n++ ) { - silk_memset( psEnc->state_Fxx[ n ].sCmn.LBRR_flags, 0, sizeof( psEnc->state_Fxx[ n ].sCmn.LBRR_flags ) ); - } - - psEnc->nBitsUsedLBRR = ec_tell( psRangeEnc ); - } - - silk_HP_variable_cutoff( psEnc->state_Fxx ); - - /* Total target bits for packet */ - nBits = silk_DIV32_16( silk_MUL( encControl->bitRate, encControl->payloadSize_ms ), 1000 ); - /* Subtract bits used for LBRR */ - if( !prefillFlag ) { - nBits -= psEnc->nBitsUsedLBRR; - } - /* Divide by number of uncoded frames left in packet */ - nBits = silk_DIV32_16( nBits, psEnc->state_Fxx[ 0 ].sCmn.nFramesPerPacket ); - /* Convert to bits/second */ - if( encControl->payloadSize_ms == 10 ) { - TargetRate_bps = silk_SMULBB( nBits, 100 ); - } else { - TargetRate_bps = silk_SMULBB( nBits, 50 ); - } - /* Subtract fraction of bits in excess of target in previous frames and packets */ - TargetRate_bps -= silk_DIV32_16( silk_MUL( psEnc->nBitsExceeded, 1000 ), BITRESERVOIR_DECAY_TIME_MS ); - if( !prefillFlag && psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded > 0 ) { - /* Compare actual vs target bits so far in this packet */ - opus_int32 bitsBalance = ec_tell( psRangeEnc ) - psEnc->nBitsUsedLBRR - nBits * psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded; - TargetRate_bps -= silk_DIV32_16( silk_MUL( bitsBalance, 1000 ), BITRESERVOIR_DECAY_TIME_MS ); - } - /* Never exceed input bitrate */ - TargetRate_bps = silk_LIMIT( TargetRate_bps, encControl->bitRate, 5000 ); - - /* Convert Left/Right to Mid/Side */ - if( encControl->nChannelsInternal == 2 ) { - silk_stereo_LR_to_MS( &psEnc->sStereo, &psEnc->state_Fxx[ 0 ].sCmn.inputBuf[ 2 ], &psEnc->state_Fxx[ 1 ].sCmn.inputBuf[ 2 ], - psEnc->sStereo.predIx[ psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded ], &psEnc->sStereo.mid_only_flags[ psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded ], - MStargetRates_bps, TargetRate_bps, psEnc->state_Fxx[ 0 ].sCmn.speech_activity_Q8, encControl->toMono, - psEnc->state_Fxx[ 0 ].sCmn.fs_kHz, psEnc->state_Fxx[ 0 ].sCmn.frame_length ); - if( psEnc->sStereo.mid_only_flags[ psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded ] == 0 ) { - /* Reset side channel encoder memory for first frame with side coding */ - if( psEnc->prev_decode_only_middle == 1 ) { - silk_memset( &psEnc->state_Fxx[ 1 ].sShape, 0, sizeof( psEnc->state_Fxx[ 1 ].sShape ) ); - silk_memset( &psEnc->state_Fxx[ 1 ].sPrefilt, 0, sizeof( psEnc->state_Fxx[ 1 ].sPrefilt ) ); - silk_memset( &psEnc->state_Fxx[ 1 ].sCmn.sNSQ, 0, sizeof( psEnc->state_Fxx[ 1 ].sCmn.sNSQ ) ); - silk_memset( psEnc->state_Fxx[ 1 ].sCmn.prev_NLSFq_Q15, 0, sizeof( psEnc->state_Fxx[ 1 ].sCmn.prev_NLSFq_Q15 ) ); - silk_memset( &psEnc->state_Fxx[ 1 ].sCmn.sLP.In_LP_State, 0, sizeof( psEnc->state_Fxx[ 1 ].sCmn.sLP.In_LP_State ) ); - psEnc->state_Fxx[ 1 ].sCmn.prevLag = 100; - psEnc->state_Fxx[ 1 ].sCmn.sNSQ.lagPrev = 100; - psEnc->state_Fxx[ 1 ].sShape.LastGainIndex = 10; - psEnc->state_Fxx[ 1 ].sCmn.prevSignalType = TYPE_NO_VOICE_ACTIVITY; - psEnc->state_Fxx[ 1 ].sCmn.sNSQ.prev_gain_Q16 = 65536; - psEnc->state_Fxx[ 1 ].sCmn.first_frame_after_reset = 1; - } - silk_encode_do_VAD_Fxx( &psEnc->state_Fxx[ 1 ] ); - } else { - psEnc->state_Fxx[ 1 ].sCmn.VAD_flags[ psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded ] = 0; - } - if( !prefillFlag ) { - silk_stereo_encode_pred( psRangeEnc, psEnc->sStereo.predIx[ psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded ] ); - if( psEnc->state_Fxx[ 1 ].sCmn.VAD_flags[ psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded ] == 0 ) { - silk_stereo_encode_mid_only( psRangeEnc, psEnc->sStereo.mid_only_flags[ psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded ] ); - } - } - } else { - /* Buffering */ - silk_memcpy( psEnc->state_Fxx[ 0 ].sCmn.inputBuf, psEnc->sStereo.sMid, 2 * sizeof( opus_int16 ) ); - silk_memcpy( psEnc->sStereo.sMid, &psEnc->state_Fxx[ 0 ].sCmn.inputBuf[ psEnc->state_Fxx[ 0 ].sCmn.frame_length ], 2 * sizeof( opus_int16 ) ); - } - silk_encode_do_VAD_Fxx( &psEnc->state_Fxx[ 0 ] ); - - /* Encode */ - for( n = 0; n < encControl->nChannelsInternal; n++ ) { - opus_int maxBits, useCBR; - - /* Handling rate constraints */ - maxBits = encControl->maxBits; - if( tot_blocks == 2 && curr_block == 0 ) { - maxBits = maxBits * 3 / 5; - } else if( tot_blocks == 3 ) { - if( curr_block == 0 ) { - maxBits = maxBits * 2 / 5; - } else if( curr_block == 1 ) { - maxBits = maxBits * 3 / 4; - } - } - useCBR = encControl->useCBR && curr_block == tot_blocks - 1; - - if( encControl->nChannelsInternal == 1 ) { - channelRate_bps = TargetRate_bps; - } else { - channelRate_bps = MStargetRates_bps[ n ]; - if( n == 0 && MStargetRates_bps[ 1 ] > 0 ) { - useCBR = 0; - /* Give mid up to 1/2 of the max bits for that frame */ - maxBits -= encControl->maxBits / ( tot_blocks * 2 ); - } - } - - if( channelRate_bps > 0 ) { - opus_int condCoding; - - silk_control_SNR( &psEnc->state_Fxx[ n ].sCmn, channelRate_bps ); - - /* Use independent coding if no previous frame available */ - if( psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded - n <= 0 ) { - condCoding = CODE_INDEPENDENTLY; - } else if( n > 0 && psEnc->prev_decode_only_middle ) { - /* If we skipped a side frame in this packet, we don't - need LTP scaling; the LTP state is well-defined. */ - condCoding = CODE_INDEPENDENTLY_NO_LTP_SCALING; - } else { - condCoding = CODE_CONDITIONALLY; - } - if( ( ret = silk_encode_frame_Fxx( &psEnc->state_Fxx[ n ], nBytesOut, psRangeEnc, condCoding, maxBits, useCBR ) ) != 0 ) { - silk_assert( 0 ); - } - } - psEnc->state_Fxx[ n ].sCmn.controlled_since_last_payload = 0; - psEnc->state_Fxx[ n ].sCmn.inputBufIx = 0; - psEnc->state_Fxx[ n ].sCmn.nFramesEncoded++; - } - psEnc->prev_decode_only_middle = psEnc->sStereo.mid_only_flags[ psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded - 1 ]; - - /* Insert VAD and FEC flags at beginning of bitstream */ - if( *nBytesOut > 0 && psEnc->state_Fxx[ 0 ].sCmn.nFramesEncoded == psEnc->state_Fxx[ 0 ].sCmn.nFramesPerPacket) { - flags = 0; - for( n = 0; n < encControl->nChannelsInternal; n++ ) { - for( i = 0; i < psEnc->state_Fxx[ n ].sCmn.nFramesPerPacket; i++ ) { - flags = silk_LSHIFT( flags, 1 ); - flags |= psEnc->state_Fxx[ n ].sCmn.VAD_flags[ i ]; - } - flags = silk_LSHIFT( flags, 1 ); - flags |= psEnc->state_Fxx[ n ].sCmn.LBRR_flag; - } - if( !prefillFlag ) { - ec_enc_patch_initial_bits( psRangeEnc, flags, ( psEnc->state_Fxx[ 0 ].sCmn.nFramesPerPacket + 1 ) * encControl->nChannelsInternal ); - } - - /* Return zero bytes if all channels DTXed */ - if( psEnc->state_Fxx[ 0 ].sCmn.inDTX && ( encControl->nChannelsInternal == 1 || psEnc->state_Fxx[ 1 ].sCmn.inDTX ) ) { - *nBytesOut = 0; - } - - psEnc->nBitsExceeded += *nBytesOut * 8; - psEnc->nBitsExceeded -= silk_DIV32_16( silk_MUL( encControl->bitRate, encControl->payloadSize_ms ), 1000 ); - psEnc->nBitsExceeded = silk_LIMIT( psEnc->nBitsExceeded, 0, 10000 ); - - /* Update flag indicating if bandwidth switching is allowed */ - speech_act_thr_for_switch_Q8 = silk_SMLAWB( SILK_FIX_CONST( SPEECH_ACTIVITY_DTX_THRES, 8 ), - SILK_FIX_CONST( ( 1 - SPEECH_ACTIVITY_DTX_THRES ) / MAX_BANDWIDTH_SWITCH_DELAY_MS, 16 + 8 ), psEnc->timeSinceSwitchAllowed_ms ); - if( psEnc->state_Fxx[ 0 ].sCmn.speech_activity_Q8 < speech_act_thr_for_switch_Q8 ) { - psEnc->allowBandwidthSwitch = 1; - psEnc->timeSinceSwitchAllowed_ms = 0; - } else { - psEnc->allowBandwidthSwitch = 0; - psEnc->timeSinceSwitchAllowed_ms += encControl->payloadSize_ms; - } - } - - if( nSamplesIn == 0 ) { - break; - } - } else { - break; - } - curr_block++; - } - - psEnc->nPrevChannelsInternal = encControl->nChannelsInternal; - - encControl->allowBandwidthSwitch = psEnc->allowBandwidthSwitch; - encControl->inWBmodeWithoutVariableLP = psEnc->state_Fxx[ 0 ].sCmn.fs_kHz == 16 && psEnc->state_Fxx[ 0 ].sCmn.sLP.mode == 0; - encControl->internalSampleRate = silk_SMULBB( psEnc->state_Fxx[ 0 ].sCmn.fs_kHz, 1000 ); - encControl->stereoWidth_Q14 = encControl->toMono ? 0 : psEnc->sStereo.smth_width_Q14; - if( prefillFlag ) { - encControl->payloadSize_ms = tmp_payloadSize_ms; - encControl->complexity = tmp_complexity; - for( n = 0; n < encControl->nChannelsInternal; n++ ) { - psEnc->state_Fxx[ n ].sCmn.controlled_since_last_payload = 0; - psEnc->state_Fxx[ n ].sCmn.prefillFlag = 0; - } - } - - RESTORE_STACK; - return ret; -} - |