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Diffstat (limited to 'media/libstagefright/codecs/amrwb/src/pvamrwbdecoder_acelp.h')
| -rw-r--r-- | media/libstagefright/codecs/amrwb/src/pvamrwbdecoder_acelp.h | 329 |
1 files changed, 329 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/amrwb/src/pvamrwbdecoder_acelp.h b/media/libstagefright/codecs/amrwb/src/pvamrwbdecoder_acelp.h new file mode 100644 index 0000000..5967115 --- /dev/null +++ b/media/libstagefright/codecs/amrwb/src/pvamrwbdecoder_acelp.h @@ -0,0 +1,329 @@ +/* ------------------------------------------------------------------ + * Copyright (C) 1998-2009 PacketVideo + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either + * express or implied. + * See the License for the specific language governing permissions + * and limitations under the License. + * ------------------------------------------------------------------- + */ +/**************************************************************************************** +Portions of this file are derived from the following 3GPP standard: + + 3GPP TS 26.173 + ANSI-C code for the Adaptive Multi-Rate - Wideband (AMR-WB) speech codec + Available from http://www.3gpp.org + +(C) 2007, 3GPP Organizational Partners (ARIB, ATIS, CCSA, ETSI, TTA, TTC) +Permission to distribute, modify and use this file under the standard license +terms listed above has been obtained from the copyright holder. +****************************************************************************************/ +/* +------------------------------------------------------------------------------ + + + + Pathname: ./cpp/include/pvamrwbdecoder_acelp.h + + Date: 01/04/2007 + +------------------------------------------------------------------------------ + REVISION HISTORY + + Description: +------------------------------------------------------------------------------ + INCLUDE DESCRIPTION + +------------------------------------------------------------------------------ +*/ + +#ifndef PVAMRWBDECODER_ACELP_H +#define PVAMRWBDECODER_ACELP_H + + +/*---------------------------------------------------------------------------- +; INCLUDES +----------------------------------------------------------------------------*/ + +#include "pv_amr_wb_type_defs.h" +#include "pvamrwbdecoder_mem_funcs.h" + +#ifdef __cplusplus +extern "C" +{ +#endif + + /*-----------------------------------------------------------------* + * LPC prototypes * + *-----------------------------------------------------------------*/ + + void isf_extrapolation(int16 HfIsf[]); + + void Init_Lagconc(int16 lag_hist[]); + void lagconceal( + int16 gain_hist[], /* (i) : Gain history */ + int16 lag_hist[], /* (i) : Subframe size */ + int16 * T0, + int16 * old_T0, + int16 * seed, + int16 unusable_frame + ); + + void agc2_amr_wb( + int16 * sig_in, /* input : postfilter input signal */ + int16 * sig_out, /* in/out: postfilter output signal */ + int16 l_trm /* input : subframe size */ + ); + + void low_pass_filt_7k_init(int16 mem[]); + void low_pass_filt_7k( + int16 signal[], /* input: signal */ + int16 lg, /* input: length of input */ + int16 mem[], /* in/out: memory (size=30) */ + int16 x[] + ); + + int16 median5(int16 x[]); + + void Isp_Az( + int16 isp[], /* (i) Q15 : Immittance spectral pairs */ + int16 a[], /* (o) Q12 : predictor coefficients (order = M) */ + int16 m, + int16 adaptive_scaling /* (i) 0 : adaptive scaling disabled */ + /* 1 : adaptive scaling enabled */ + ); + void Isf_isp( + int16 isf[], /* (i) Q15 : isf[m] normalized (range: 0.0<=val<=0.5) */ + int16 isp[], /* (o) Q15 : isp[m] (range: -1<=val<1) */ + int16 m /* (i) : LPC order */ + ); + void interpolate_isp( + int16 isp_old[], /* input : isps from past frame */ + int16 isp_new[], /* input : isps from present frame */ + const int16 frac[], /* input : fraction for 3 first subfr (Q15) */ + int16 Az[] /* output: LP coefficients in 4 subframes */ + ); + void weight_amrwb_lpc( + int16 a[], /* (i) Q12 : a[m+1] LPC coefficients */ + int16 ap[], /* (o) Q12 : Spectral expanded LPC coefficients */ + int16 gamma, /* (i) Q15 : Spectral expansion factor. */ + int16 m /* (i) : LPC order. */ + ); + + + /*-----------------------------------------------------------------* + * isf quantizers * + *-----------------------------------------------------------------*/ + + void Disf_ns( + int16 * indice, /* input: quantization indices */ + int16 * isf_q /* input : ISF in the frequency domain (0..0.5) */ + ); + + void Dpisf_2s_46b( + int16 * indice, /* input: quantization indices */ + int16 * isf_q, /* output: quantized ISF in frequency domain (0..0.5) */ + int16 * past_isfq, /* i/0 : past ISF quantizer */ + int16 * isfold, /* input : past quantized ISF */ + int16 * isf_buf, /* input : isf buffer */ + int16 bfi, /* input : Bad frame indicator */ + int16 enc_dec + ); + void Dpisf_2s_36b( + int16 * indice, /* input: quantization indices */ + int16 * isf_q, /* output: quantized ISF in frequency domain (0..0.5) */ + int16 * past_isfq, /* i/0 : past ISF quantizer */ + int16 * isfold, /* input : past quantized ISF */ + int16 * isf_buf, /* input : isf buffer */ + int16 bfi, /* input : Bad frame indicator */ + int16 enc_dec + ); + + + void Reorder_isf( + int16 * isf, /* (i/o) Q15: ISF in the frequency domain (0..0.5) */ + int16 min_dist, /* (i) Q15 : minimum distance to keep */ + int16 n /* (i) : number of ISF */ + ); + + /*-----------------------------------------------------------------* + * filter prototypes * + *-----------------------------------------------------------------*/ + + void oversamp_12k8_to_16k_init( + int16 mem[] /* output: memory (2*NB_COEF_UP) set to zeros */ + ); + void oversamp_12k8_to_16k( + int16 sig12k8[], /* input: signal to oversampling */ + int16 lg, /* input: length of input */ + int16 sig16k[], /* output: oversampled signal */ + int16 mem[], /* in/out: memory (2*NB_COEF_UP) */ + int16 signal[] + ); + + void highpass_50Hz_at_12k8_init(int16 mem[]); + void highpass_50Hz_at_12k8( + int16 signal[], /* input/output signal */ + int16 lg, /* lenght of signal */ + int16 mem[] /* filter memory [6] */ + ); + void highpass_400Hz_at_12k8_init(int16 mem[]); + void highpass_400Hz_at_12k8( + int16 signal[], /* input/output signal */ + int16 lg, /* lenght of signal */ + int16 mem[] /* filter memory [6] */ + ); + + void band_pass_6k_7k_init(int16 mem[]); + void band_pass_6k_7k( + int16 signal[], /* input: signal */ + int16 lg, /* input: length of input */ + int16 mem[], /* in/out: memory (size=30) */ + int16 x[] + ); + + + void preemph_amrwb_dec( + int16 x[], /* (i/o) : input signal overwritten by the output */ + int16 mu, /* (i) Q15 : preemphasis coefficient */ + int16 lg /* (i) : lenght of filtering */ + ); + + void deemphasis_32( + int16 x_hi[], /* (i) : input signal (bit31..16) */ + int16 x_lo[], /* (i) : input signal (bit15..4) */ + int16 y[], /* (o) : output signal (x16) */ + int16 mu, /* (i) Q15 : deemphasis factor */ + int16 L, /* (i) : vector size */ + int16 * mem /* (i/o) : memory (y[-1]) */ + ); + + + void wb_syn_filt( + int16 a[], /* (i) Q12 : a[m+1] prediction coefficients */ + int16 m, /* (i) : order of LP filter */ + int16 x[], /* (i) : input signal */ + int16 y[], /* (o) : output signal */ + int16 lg, /* (i) : size of filtering */ + int16 mem[], /* (i/o) : memory associated with this filtering. */ + int16 update, /* (i) : 0=no update, 1=update of memory. */ + int16 y_buf[] + ); + void Syn_filt_32( + int16 a[], /* (i) Q12 : a[m+1] prediction coefficients */ + int16 m, /* (i) : order of LP filter */ + int16 exc[], /* (i) Qnew: excitation (exc[i] >> Qnew) */ + int16 Qnew, /* (i) : exc scaling = 0(min) to 8(max) */ + int16 sig_hi[], /* (o) /16 : synthesis high */ + int16 sig_lo[], /* (o) /16 : synthesis low */ + int16 lg /* (i) : size of filtering */ + ); + + /*-----------------------------------------------------------------* + * pitch prototypes * + *-----------------------------------------------------------------*/ + + + void Pred_lt4( + int16 exc[], /* in/out: excitation buffer */ + int16 T0, /* input : integer pitch lag */ + int16 frac, /* input : fraction of lag */ + int16 L_subfr /* input : subframe size */ + ); + + /*-----------------------------------------------------------------* + * gain prototypes * + *-----------------------------------------------------------------*/ + + + void dec_gain2_amr_wb_init( + int16 * mem /* output : memory (4 words) */ + ); + void dec_gain2_amr_wb( + int16 index, /* (i) :index of quantization. */ + int16 nbits, /* (i) : number of bits (6 or 7) */ + int16 code[], /* (i) Q9 :Innovative vector. */ + int16 L_subfr, /* (i) :Subframe lenght. */ + int16 * gain_pit, /* (o) Q14 :Pitch gain. */ + int32 * gain_cod, /* (o) Q16 :Code gain. */ + int16 bfi, /* (i) :bad frame indicator */ + int16 prev_bfi, /* (i) : Previous BF indicator */ + int16 state, /* (i) : State of BFH */ + int16 unusable_frame, /* (i) : UF indicator */ + int16 vad_hist, /* (i) :number of non-speech frames */ + int16 * mem /* (i/o) : memory (4 words) */ + ); + + /*-----------------------------------------------------------------* + * acelp prototypes * + *-----------------------------------------------------------------*/ + + void dec_acelp_2p_in_64( + int16 index, /* (i) : 12 bits index */ + int16 code[] /* (o) :Q9 algebraic (fixed) codebook excitation */ + ); + + void dec_acelp_4p_in_64( + int16 index[], /* (i) : index (20): 5+5+5+5 = 20 bits. */ + /* (i) : index (36): 9+9+9+9 = 36 bits. */ + /* (i) : index (44): 13+9+13+9 = 44 bits. */ + /* (i) : index (52): 13+13+13+13 = 52 bits. */ + /* (i) : index (64): 2+2+2+2+14+14+14+14 = 64 bits. */ + /* (i) : index (72): 10+2+10+2+10+14+10+14 = 72 bits. */ + /* (i) : index (88): 11+11+11+11+11+11+11+11 = 88 bits. */ + int16 nbbits, /* (i) : 20, 36, 44, 52, 64, 72 or 88 bits */ + int16 code[] /* (o) Q9: algebraic (fixed) codebook excitation */ + ); + void Pit_shrp( + int16 * x, /* in/out: impulse response (or algebraic code) */ + int16 pit_lag, /* input : pitch lag */ + int16 sharp, /* input : pitch sharpening factor (Q15) */ + int16 L_subfr /* input : subframe size */ + ); + + + /*-----------------------------------------------------------------* + * others prototypes * + *-----------------------------------------------------------------*/ + + int16 voice_factor( /* (o) Q15 : factor (-1=unvoiced to 1=voiced) */ + int16 exc[], /* (i) Q_exc: pitch excitation */ + int16 Q_exc, /* (i) : exc format */ + int16 gain_pit, /* (i) Q14 : gain of pitch */ + int16 code[], /* (i) Q9 : Fixed codebook excitation */ + int16 gain_code, /* (i) Q0 : gain of code */ + int16 L_subfr /* (i) : subframe length */ + ); + + void scale_signal( + int16 x[], /* (i/o) : signal to scale */ + int16 lg, /* (i) : size of x[] */ + int16 exp /* (i) : exponent: x = round(x << exp) */ + ); + + int16 noise_gen_amrwb(int16 * seed); + + + void phase_dispersion( + int16 gain_code, /* (i) Q0 : gain of code */ + int16 gain_pit, /* (i) Q14 : gain of pitch */ + int16 code[], /* (i/o) : code vector */ + int16 mode, /* (i) : level, 0=hi, 1=lo, 2=off */ + int16 disp_mem[], /* (i/o) : memory (size = 8) */ + int16 ScratchMem[] + ); + +#ifdef __cplusplus +} +#endif + +#endif /* ACELP_H */ + |