summaryrefslogtreecommitdiff
path: root/src/opus-1.0.2/silk/float/encode_frame_FLP.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/opus-1.0.2/silk/float/encode_frame_FLP.c')
-rw-r--r--src/opus-1.0.2/silk/float/encode_frame_FLP.c372
1 files changed, 0 insertions, 372 deletions
diff --git a/src/opus-1.0.2/silk/float/encode_frame_FLP.c b/src/opus-1.0.2/silk/float/encode_frame_FLP.c
deleted file mode 100644
index 23260bc7..00000000
--- a/src/opus-1.0.2/silk/float/encode_frame_FLP.c
+++ /dev/null
@@ -1,372 +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.
-***********************************************************************/
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "main_FLP.h"
-#include "tuning_parameters.h"
-
-/* Low Bitrate Redundancy (LBRR) encoding. Reuse all parameters but encode with lower bitrate */
-static inline void silk_LBRR_encode_FLP(
- silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
- silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
- const silk_float xfw[], /* I Input signal */
- opus_int condCoding /* I The type of conditional coding used so far for this frame */
-);
-
-void silk_encode_do_VAD_FLP(
- silk_encoder_state_FLP *psEnc /* I/O Encoder state FLP */
-)
-{
- /****************************/
- /* Voice Activity Detection */
- /****************************/
- silk_VAD_GetSA_Q8( &psEnc->sCmn, psEnc->sCmn.inputBuf + 1 );
-
- /**************************************************/
- /* Convert speech activity into VAD and DTX flags */
- /**************************************************/
- if( psEnc->sCmn.speech_activity_Q8 < SILK_FIX_CONST( SPEECH_ACTIVITY_DTX_THRES, 8 ) ) {
- psEnc->sCmn.indices.signalType = TYPE_NO_VOICE_ACTIVITY;
- psEnc->sCmn.noSpeechCounter++;
- if( psEnc->sCmn.noSpeechCounter < NB_SPEECH_FRAMES_BEFORE_DTX ) {
- 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_FLP(
- silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
- opus_int32 *pnBytesOut, /* O 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_FLP sEncCtrl;
- opus_int i, iter, maxIter, found_upper, found_lower, ret = 0;
- silk_float *x_frame, *res_pitch_frame;
- silk_float xfw[ MAX_FRAME_LENGTH ];
- silk_float res_pitch[ 2 * MAX_FRAME_LENGTH + LA_PITCH_MAX ];
- 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;
- opus_int32 pGains_Q16[ MAX_NB_SUBFR ];
- opus_uint8 ec_buf_copy[ 1275 ];
-
- /* 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 */
- /**************************************************************/
- /* pointers aligned with start of frame to encode */
- x_frame = psEnc->x_buf + psEnc->sCmn.ltp_mem_length; /* start of frame to encode */
- res_pitch_frame = res_pitch + psEnc->sCmn.ltp_mem_length; /* start of pitch LPC residual frame */
-
- /***************************************/
- /* 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_short2float_array( x_frame + LA_SHAPE_MS * psEnc->sCmn.fs_kHz, psEnc->sCmn.inputBuf + 1, psEnc->sCmn.frame_length );
-
- /* Add tiny signal to avoid high CPU load from denormalized floating point numbers */
- for( i = 0; i < 8; i++ ) {
- x_frame[ LA_SHAPE_MS * psEnc->sCmn.fs_kHz + i * ( psEnc->sCmn.frame_length >> 3 ) ] += ( 1 - ( i & 2 ) ) * 1e-6f;
- }
-
- if( !psEnc->sCmn.prefillFlag ) {
- /*****************************************/
- /* Find pitch lags, initial LPC analysis */
- /*****************************************/
- silk_find_pitch_lags_FLP( psEnc, &sEncCtrl, res_pitch, x_frame );
-
- /************************/
- /* Noise shape analysis */
- /************************/
- silk_noise_shape_analysis_FLP( psEnc, &sEncCtrl, res_pitch_frame, x_frame );
-
- /***************************************************/
- /* Find linear prediction coefficients (LPC + LTP) */
- /***************************************************/
- silk_find_pred_coefs_FLP( psEnc, &sEncCtrl, res_pitch, x_frame, condCoding );
-
- /****************************************/
- /* Process gains */
- /****************************************/
- silk_process_gains_FLP( psEnc, &sEncCtrl, condCoding );
-
- /*****************************************/
- /* Prefiltering for noise shaper */
- /*****************************************/
- silk_prefilter_FLP( psEnc, &sEncCtrl, xfw, x_frame );
-
- /****************************************/
- /* Low Bitrate Redundant Encoding */
- /****************************************/
- silk_LBRR_encode_FLP( psEnc, &sEncCtrl, xfw, condCoding );
-
- /* Loop over quantizer and entroy 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;
- 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 */
- /*****************************************/
- silk_NSQ_wrapper_FLP( psEnc, &sEncCtrl, &psEnc->sCmn.indices, &psEnc->sCmn.sNSQ, psEnc->sCmn.pulses, xfw );
-
- /****************************************/
- /* 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 ) );
- silk_assert( sRangeEnc_copy2.offs <= 1275 );
- 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 *= 1.5f;
- 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 ) );
- silk_assert( psRangeEnc->offs <= 1275 );
- 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 */
- 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 ) );
- if( nBits > maxBits ) {
- gain_factor_Q16 = silk_max_32( gain_factor_Q16, SILK_FIX_CONST( 1.3, 16 ) );
- }
- gainMult_Q8 = silk_SMULWB( gain_factor_Q16, gainMult_Q8 );
- } else {
- /* Adjust gain by interpolating */
- gainMult_Q8 = gainMult_lower + ( ( 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++ ) {
- pGains_Q16[ i ] = silk_LSHIFT_SAT32( silk_SMULWB( sEncCtrl.GainsUnq_Q16[ i ], gainMult_Q8 ), 8 );
- }
-
- /* Quantize gains */
- psEnc->sShape.LastGainIndex = sEncCtrl.lastGainIndexPrev;
- silk_gains_quant( psEnc->sCmn.indices.GainsIndices, pGains_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 );
-
- /* Overwrite unquantized gains with quantized gains and convert back to Q0 from Q16 */
- for( i = 0; i < psEnc->sCmn.nb_subfr; i++ ) {
- sEncCtrl.Gains[ i ] = pGains_Q16[ i ] / 65536.0f;
- }
- }
- }
-
- /* 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( silk_float ) );
-
- /* Parameters needed for next frame */
- psEnc->sCmn.prevLag = sEncCtrl.pitchL[ psEnc->sCmn.nb_subfr - 1 ];
- psEnc->sCmn.prevSignalType = psEnc->sCmn.indices.signalType;
-
- /* Exit without entropy coding */
- if( psEnc->sCmn.prefillFlag ) {
- /* No payload */
- *pnBytesOut = 0;
- return ret;
- }
-
- /****************************************/
- /* Finalize payload */
- /****************************************/
- psEnc->sCmn.first_frame_after_reset = 0;
- /* Payload size */
- *pnBytesOut = silk_RSHIFT( ec_tell( psRangeEnc ) + 7, 3 );
-
- return ret;
-}
-
-/* Low-Bitrate Redundancy (LBRR) encoding. Reuse all parameters but encode excitation at lower bitrate */
-static inline void silk_LBRR_encode_FLP(
- silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
- silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
- const silk_float xfw[], /* I Input signal */
- opus_int condCoding /* I The type of conditional coding used so far for this frame */
-)
-{
- opus_int k;
- opus_int32 Gains_Q16[ MAX_NB_SUBFR ];
- silk_float TempGains[ 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, psEncCtrl->Gains, psEnc->sCmn.nb_subfr * sizeof( silk_float ) );
-
- 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 ] += 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 */
- silk_gains_dequant( Gains_Q16, psIndices_LBRR->GainsIndices,
- &psEnc->sCmn.LBRRprevLastGainIndex, condCoding == CODE_CONDITIONALLY, psEnc->sCmn.nb_subfr );
-
- /* Overwrite unquantized gains with quantized gains and convert back to Q0 from Q16 */
- for( k = 0; k < psEnc->sCmn.nb_subfr; k++ ) {
- psEncCtrl->Gains[ k ] = Gains_Q16[ k ] * ( 1.0f / 65536.0f );
- }
-
- /*****************************************/
- /* Noise shaping quantization */
- /*****************************************/
- silk_NSQ_wrapper_FLP( psEnc, psEncCtrl, psIndices_LBRR, &sNSQ_LBRR,
- psEnc->sCmn.pulses_LBRR[ psEnc->sCmn.nFramesEncoded ], xfw );
-
- /* Restore original gains */
- silk_memcpy( psEncCtrl->Gains, TempGains, psEnc->sCmn.nb_subfr * sizeof( silk_float ) );
- }
-}
generated by cgit (git 2.34.1) at 2024-11-15 18:56:33 +0000