294bfec27b
This is achieved by running the encoding process in a loop and padding when we don't reach the exact rate. It also implements VBR-with-cap, which means we no longer need to artificially decrease the SILK bandwidth when it's close to the cap.
135 lines
5.7 KiB
C
135 lines
5.7 KiB
C
/***********************************************************************
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Copyright (c) 2006-2011, Skype Limited. All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, (subject to the limitations in the disclaimer below)
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are permitted provided that the following conditions are met:
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- Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of Skype Limited, nor the names of specific
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contributors, may be used to endorse or promote products derived from
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this software without specific prior written permission.
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NO EXPRESS OR IMPLIED LICENSES TO ANY PARTY'S PATENT RIGHTS ARE GRANTED
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BY THIS LICENSE. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS ''AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
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BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
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USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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***********************************************************************/
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#ifndef SILK_STRUCTS_FLP_H
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#define SILK_STRUCTS_FLP_H
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#include "typedef.h"
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#include "main.h"
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#include "structs.h"
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/********************************/
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/* Noise shaping analysis state */
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/********************************/
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typedef struct {
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opus_int8 LastGainIndex;
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silk_float HarmBoost_smth;
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silk_float HarmShapeGain_smth;
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silk_float Tilt_smth;
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} silk_shape_state_FLP;
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/********************************/
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/* Prefilter state */
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/********************************/
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typedef struct {
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silk_float sLTP_shp[ LTP_BUF_LENGTH ];
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silk_float sAR_shp[ MAX_SHAPE_LPC_ORDER + 1 ];
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opus_int sLTP_shp_buf_idx;
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silk_float sLF_AR_shp;
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silk_float sLF_MA_shp;
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silk_float sHarmHP;
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opus_int32 rand_seed;
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opus_int lagPrev;
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} silk_prefilter_state_FLP;
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/********************************/
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/* Encoder state FLP */
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/********************************/
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typedef struct {
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silk_encoder_state sCmn; /* Common struct, shared with fixed-point code */
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silk_shape_state_FLP sShape; /* Noise shaping state */
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silk_prefilter_state_FLP sPrefilt; /* Prefilter State */
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/* Buffer for find pitch and noise shape analysis */
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silk_float x_buf[ 2 * MAX_FRAME_LENGTH + LA_SHAPE_MAX ];/* Buffer for find pitch and noise shape analysis */
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silk_float LTPCorr; /* Normalized correlation from pitch lag estimator */
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/* Parameters for LTP scaling control */
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silk_float prevLTPredCodGain;
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silk_float HPLTPredCodGain;
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} silk_encoder_state_FLP;
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/************************/
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/* Encoder control FLP */
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/************************/
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typedef struct {
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/* Prediction and coding parameters */
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silk_float Gains[ MAX_NB_SUBFR ];
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silk_float PredCoef[ 2 ][ MAX_LPC_ORDER ]; /* holds interpolated and final coefficients */
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silk_float LTPCoef[LTP_ORDER * MAX_NB_SUBFR];
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silk_float LTP_scale;
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opus_int pitchL[ MAX_NB_SUBFR ];
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/* Noise shaping parameters */
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silk_float AR1[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
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silk_float AR2[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ];
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silk_float LF_MA_shp[ MAX_NB_SUBFR ];
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silk_float LF_AR_shp[ MAX_NB_SUBFR ];
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silk_float GainsPre[ MAX_NB_SUBFR ];
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silk_float HarmBoost[ MAX_NB_SUBFR ];
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silk_float Tilt[ MAX_NB_SUBFR ];
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silk_float HarmShapeGain[ MAX_NB_SUBFR ];
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silk_float Lambda;
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silk_float input_quality;
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silk_float coding_quality;
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/* Measures */
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silk_float sparseness;
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silk_float predGain;
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silk_float LTPredCodGain;
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silk_float ResNrg[ MAX_NB_SUBFR ]; /* Residual energy per subframe */
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/* Parameters for CBR mode */
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opus_int32 GainsUnq_Q16[ MAX_NB_SUBFR ];
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opus_int8 lastGainIndexPrev;
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} silk_encoder_control_FLP;
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/************************/
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/* Encoder Super Struct */
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/************************/
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typedef struct {
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silk_encoder_state_FLP state_Fxx[ ENCODER_NUM_CHANNELS ];
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stereo_enc_state sStereo;
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opus_int32 nBitsExceeded;
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opus_int nChannelsAPI;
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opus_int nChannelsInternal;
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opus_int nPrevChannelsInternal;
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opus_int timeSinceSwitchAllowed_ms;
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opus_int allowBandwidthSwitch;
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opus_int prev_decode_only_middle;
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} silk_encoder;
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#ifdef __cplusplus
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}
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#endif
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#endif
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