| /* |
| ** Copyright 2003-2010, VisualOn, Inc. |
| ** |
| ** 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. |
| */ |
| |
| |
| /*--------------------------------------------------------------------------* |
| * ACELP.H * |
| *--------------------------------------------------------------------------* |
| * Function * |
| *--------------------------------------------------------------------------*/ |
| #ifndef __ACELP_H__ |
| #define __ACELP_H__ |
| |
| #include "typedef.h" |
| #include "cod_main.h" |
| |
| /*-----------------------------------------------------------------* |
| * LPC prototypes * |
| *-----------------------------------------------------------------*/ |
| |
| Word16 median5(Word16 x[]); |
| |
| void Autocorr( |
| Word16 x[], /* (i) : Input signal */ |
| Word16 m, /* (i) : LPC order */ |
| Word16 r_h[], /* (o) : Autocorrelations (msb) */ |
| Word16 r_l[] /* (o) : Autocorrelations (lsb) */ |
| ); |
| |
| void Lag_window( |
| Word16 r_h[], /* (i/o) : Autocorrelations (msb) */ |
| Word16 r_l[] /* (i/o) : Autocorrelations (lsb) */ |
| ); |
| |
| void Init_Levinson( |
| Word16 * mem /* output :static memory (18 words) */ |
| ); |
| |
| void Levinson( |
| Word16 Rh[], /* (i) : Rh[M+1] Vector of autocorrelations (msb) */ |
| Word16 Rl[], /* (i) : Rl[M+1] Vector of autocorrelations (lsb) */ |
| Word16 A[], /* (o) Q12 : A[M] LPC coefficients (m = 16) */ |
| Word16 rc[], /* (o) Q15 : rc[M] Reflection coefficients. */ |
| Word16 * mem /* (i/o) :static memory (18 words) */ |
| ); |
| |
| void Az_isp( |
| Word16 a[], /* (i) Q12 : predictor coefficients */ |
| Word16 isp[], /* (o) Q15 : Immittance spectral pairs */ |
| Word16 old_isp[] /* (i) : old isp[] (in case not found M roots) */ |
| ); |
| |
| void Isp_Az( |
| Word16 isp[], /* (i) Q15 : Immittance spectral pairs */ |
| Word16 a[], /* (o) Q12 : predictor coefficients (order = M) */ |
| Word16 m, |
| Word16 adaptive_scaling /* (i) 0 : adaptive scaling disabled */ |
| /* 1 : adaptive scaling enabled */ |
| ); |
| |
| void Isp_isf( |
| Word16 isp[], /* (i) Q15 : isp[m] (range: -1<=val<1) */ |
| Word16 isf[], /* (o) Q15 : isf[m] normalized (range: 0.0<=val<=0.5) */ |
| Word16 m /* (i) : LPC order */ |
| ); |
| |
| void Isf_isp( |
| Word16 isf[], /* (i) Q15 : isf[m] normalized (range: 0.0<=val<=0.5) */ |
| Word16 isp[], /* (o) Q15 : isp[m] (range: -1<=val<1) */ |
| Word16 m /* (i) : LPC order */ |
| ); |
| |
| void Int_isp( |
| Word16 isp_old[], /* input : isps from past frame */ |
| Word16 isp_new[], /* input : isps from present frame */ |
| Word16 frac[], /* input : fraction for 3 first subfr (Q15) */ |
| Word16 Az[] /* output: LP coefficients in 4 subframes */ |
| ); |
| |
| void Weight_a( |
| Word16 a[], /* (i) Q12 : a[m+1] LPC coefficients */ |
| Word16 ap[], /* (o) Q12 : Spectral expanded LPC coefficients */ |
| Word16 gamma, /* (i) Q15 : Spectral expansion factor. */ |
| Word16 m /* (i) : LPC order. */ |
| ); |
| |
| |
| /*-----------------------------------------------------------------* |
| * isf quantizers * |
| *-----------------------------------------------------------------*/ |
| |
| void Qpisf_2s_46b( |
| Word16 * isf1, /* (i) Q15 : ISF in the frequency domain (0..0.5) */ |
| Word16 * isf_q, /* (o) Q15 : quantized ISF (0..0.5) */ |
| Word16 * past_isfq, /* (io)Q15 : past ISF quantizer */ |
| Word16 * indice, /* (o) : quantization indices */ |
| Word16 nb_surv /* (i) : number of survivor (1, 2, 3 or 4) */ |
| ); |
| |
| void Qpisf_2s_36b( |
| Word16 * isf1, /* (i) Q15 : ISF in the frequency domain (0..0.5) */ |
| Word16 * isf_q, /* (o) Q15 : quantized ISF (0..0.5) */ |
| Word16 * past_isfq, /* (io)Q15 : past ISF quantizer */ |
| Word16 * indice, /* (o) : quantization indices */ |
| Word16 nb_surv /* (i) : number of survivor (1, 2, 3 or 4) */ |
| ); |
| |
| void Dpisf_2s_46b( |
| Word16 * indice, /* input: quantization indices */ |
| Word16 * isf_q, /* output: quantized ISF in frequency domain (0..0.5) */ |
| Word16 * past_isfq, /* i/0 : past ISF quantizer */ |
| Word16 * isfold, /* input : past quantized ISF */ |
| Word16 * isf_buf, /* input : isf buffer */ |
| Word16 bfi, /* input : Bad frame indicator */ |
| Word16 enc_dec |
| ); |
| |
| void Dpisf_2s_36b( |
| Word16 * indice, /* input: quantization indices */ |
| Word16 * isf_q, /* output: quantized ISF in frequency domain (0..0.5) */ |
| Word16 * past_isfq, /* i/0 : past ISF quantizer */ |
| Word16 * isfold, /* input : past quantized ISF */ |
| Word16 * isf_buf, /* input : isf buffer */ |
| Word16 bfi, /* input : Bad frame indicator */ |
| Word16 enc_dec |
| ); |
| |
| void Qisf_ns( |
| Word16 * isf1, /* input : ISF in the frequency domain (0..0.5) */ |
| Word16 * isf_q, /* output: quantized ISF */ |
| Word16 * indice /* output: quantization indices */ |
| ); |
| |
| void Disf_ns( |
| Word16 * indice, /* input: quantization indices */ |
| Word16 * isf_q /* input : ISF in the frequency domain (0..0.5) */ |
| ); |
| |
| Word16 Sub_VQ( /* output: return quantization index */ |
| Word16 * x, /* input : ISF residual vector */ |
| Word16 * dico, /* input : quantization codebook */ |
| Word16 dim, /* input : dimention of vector */ |
| Word16 dico_size, /* input : size of quantization codebook */ |
| Word32 * distance /* output: error of quantization */ |
| ); |
| |
| void Reorder_isf( |
| Word16 * isf, /* (i/o) Q15: ISF in the frequency domain (0..0.5) */ |
| Word16 min_dist, /* (i) Q15 : minimum distance to keep */ |
| Word16 n /* (i) : number of ISF */ |
| ); |
| |
| /*-----------------------------------------------------------------* |
| * filter prototypes * |
| *-----------------------------------------------------------------*/ |
| |
| void Init_Decim_12k8( |
| Word16 mem[] /* output: memory (2*NB_COEF_DOWN) set to zeros */ |
| ); |
| void Decim_12k8( |
| Word16 sig16k[], /* input: signal to downsampling */ |
| Word16 lg, /* input: length of input */ |
| Word16 sig12k8[], /* output: decimated signal */ |
| Word16 mem[] /* in/out: memory (2*NB_COEF_DOWN) */ |
| ); |
| |
| void Init_HP50_12k8(Word16 mem[]); |
| void HP50_12k8( |
| Word16 signal[], /* input/output signal */ |
| Word16 lg, /* lenght of signal */ |
| Word16 mem[] /* filter memory [6] */ |
| ); |
| void Init_HP400_12k8(Word16 mem[]); |
| void HP400_12k8( |
| Word16 signal[], /* input/output signal */ |
| Word16 lg, /* lenght of signal */ |
| Word16 mem[] /* filter memory [6] */ |
| ); |
| |
| void Init_Filt_6k_7k(Word16 mem[]); |
| void Filt_6k_7k( |
| Word16 signal[], /* input: signal */ |
| Word16 lg, /* input: length of input */ |
| Word16 mem[] /* in/out: memory (size=30) */ |
| ); |
| void Filt_6k_7k_asm( |
| Word16 signal[], /* input: signal */ |
| Word16 lg, /* input: length of input */ |
| Word16 mem[] /* in/out: memory (size=30) */ |
| ); |
| |
| void LP_Decim2( |
| Word16 x[], /* in/out: signal to process */ |
| Word16 l, /* input : size of filtering */ |
| Word16 mem[] /* in/out: memory (size=3) */ |
| ); |
| |
| void Preemph( |
| Word16 x[], /* (i/o) : input signal overwritten by the output */ |
| Word16 mu, /* (i) Q15 : preemphasis coefficient */ |
| Word16 lg, /* (i) : lenght of filtering */ |
| Word16 * mem /* (i/o) : memory (x[-1]) */ |
| ); |
| void Preemph2( |
| Word16 x[], /* (i/o) : input signal overwritten by the output */ |
| Word16 mu, /* (i) Q15 : preemphasis coefficient */ |
| Word16 lg, /* (i) : lenght of filtering */ |
| Word16 * mem /* (i/o) : memory (x[-1]) */ |
| ); |
| void Deemph( |
| Word16 x[], /* (i/o) : input signal overwritten by the output */ |
| Word16 mu, /* (i) Q15 : deemphasis factor */ |
| Word16 L, /* (i) : vector size */ |
| Word16 * mem /* (i/o) : memory (y[-1]) */ |
| ); |
| void Deemph2( |
| Word16 x[], /* (i/o) : input signal overwritten by the output */ |
| Word16 mu, /* (i) Q15 : deemphasis factor */ |
| Word16 L, /* (i) : vector size */ |
| Word16 * mem /* (i/o) : memory (y[-1]) */ |
| ); |
| void Deemph_32( |
| Word16 x_hi[], /* (i) : input signal (bit31..16) */ |
| Word16 x_lo[], /* (i) : input signal (bit15..4) */ |
| Word16 y[], /* (o) : output signal (x16) */ |
| Word16 mu, /* (i) Q15 : deemphasis factor */ |
| Word16 L, /* (i) : vector size */ |
| Word16 * mem /* (i/o) : memory (y[-1]) */ |
| ); |
| |
| void Deemph_32_asm( |
| Word16 x_hi[], /* (i) : input signal (bit31..16) */ |
| Word16 x_lo[], /* (i) : input signal (bit15..4) */ |
| Word16 y[], /* (o) : output signal (x16) */ |
| Word16 * mem /* (i/o) : memory (y[-1]) */ |
| ); |
| |
| void Convolve( |
| Word16 x[], /* (i) : input vector */ |
| Word16 h[], /* (i) Q15 : impulse response */ |
| Word16 y[], /* (o) 12 bits: output vector */ |
| Word16 L /* (i) : vector size */ |
| ); |
| |
| void Convolve_asm( |
| Word16 x[], /* (i) : input vector */ |
| Word16 h[], /* (i) Q15 : impulse response */ |
| Word16 y[], /* (o) 12 bits: output vector */ |
| Word16 L /* (i) : vector size */ |
| ); |
| |
| void Residu( |
| Word16 a[], /* (i) Q12 : prediction coefficients */ |
| Word16 x[], /* (i) : speech (values x[-m..-1] are needed */ |
| Word16 y[], /* (o) : residual signal */ |
| Word16 lg /* (i) : size of filtering */ |
| ); |
| |
| void Residu_opt( |
| Word16 a[], /* (i) Q12 : prediction coefficients */ |
| Word16 x[], /* (i) : speech (values x[-m..-1] are needed */ |
| Word16 y[], /* (o) : residual signal */ |
| Word16 lg /* (i) : size of filtering */ |
| ); |
| |
| void Syn_filt( |
| Word16 a[], /* (i) Q12 : a[m+1] prediction coefficients */ |
| Word16 x[], /* (i) : input signal */ |
| Word16 y[], /* (o) : output signal */ |
| Word16 lg, /* (i) : size of filtering */ |
| Word16 mem[], /* (i/o) : memory associated with this filtering. */ |
| Word16 update /* (i) : 0=no update, 1=update of memory. */ |
| ); |
| |
| void Syn_filt_asm( |
| Word16 a[], /* (i) Q12 : a[m+1] prediction coefficients */ |
| Word16 x[], /* (i) : input signal */ |
| Word16 y[], /* (o) : output signal */ |
| Word16 mem[] /* (i/o) : memory associated with this filtering. */ |
| ); |
| |
| void Syn_filt_32( |
| Word16 a[], /* (i) Q12 : a[m+1] prediction coefficients */ |
| Word16 m, /* (i) : order of LP filter */ |
| Word16 exc[], /* (i) Qnew: excitation (exc[i] >> Qnew) */ |
| Word16 Qnew, /* (i) : exc scaling = 0(min) to 8(max) */ |
| Word16 sig_hi[], /* (o) /16 : synthesis high */ |
| Word16 sig_lo[], /* (o) /16 : synthesis low */ |
| Word16 lg /* (i) : size of filtering */ |
| ); |
| |
| void Syn_filt_32_asm( |
| Word16 a[], /* (i) Q12 : a[m+1] prediction coefficients */ |
| Word16 m, /* (i) : order of LP filter */ |
| Word16 exc[], /* (i) Qnew: excitation (exc[i] >> Qnew) */ |
| Word16 Qnew, /* (i) : exc scaling = 0(min) to 8(max) */ |
| Word16 sig_hi[], /* (o) /16 : synthesis high */ |
| Word16 sig_lo[], /* (o) /16 : synthesis low */ |
| Word16 lg /* (i) : size of filtering */ |
| ); |
| /*-----------------------------------------------------------------* |
| * pitch prototypes * |
| *-----------------------------------------------------------------*/ |
| |
| Word16 Pitch_ol( /* output: open loop pitch lag */ |
| Word16 signal[], /* input : signal used to compute the open loop pitch */ |
| /* signal[-pit_max] to signal[-1] should be known */ |
| Word16 pit_min, /* input : minimum pitch lag */ |
| Word16 pit_max, /* input : maximum pitch lag */ |
| Word16 L_frame /* input : length of frame to compute pitch */ |
| ); |
| |
| Word16 Pitch_med_ol( /* output: open loop pitch lag */ |
| Word16 wsp[], /* input : signal used to compute the open loop pitch */ |
| /* wsp[-pit_max] to wsp[-1] should be known */ |
| Coder_State *st, /* i/o : global codec structure */ |
| Word16 L_frame /* input : length of frame to compute pitch */ |
| ); |
| |
| Word16 Med_olag( /* output : median of 5 previous open-loop lags */ |
| Word16 prev_ol_lag, /* input : previous open-loop lag */ |
| Word16 old_ol_lag[5] |
| ); |
| |
| void Init_Hp_wsp(Word16 mem[]); |
| void scale_mem_Hp_wsp(Word16 mem[], Word16 exp); |
| void Hp_wsp( |
| Word16 wsp[], /* i : wsp[] signal */ |
| Word16 hp_wsp[], /* o : hypass wsp[] */ |
| Word16 lg, /* i : lenght of signal */ |
| Word16 mem[] /* i/o : filter memory [9] */ |
| ); |
| |
| Word16 Pitch_fr4( /* (o) : pitch period. */ |
| Word16 exc[], /* (i) : excitation buffer */ |
| Word16 xn[], /* (i) : target vector */ |
| Word16 h[], /* (i) Q15 : impulse response of synth/wgt filters */ |
| Word16 t0_min, /* (i) : minimum value in the searched range. */ |
| Word16 t0_max, /* (i) : maximum value in the searched range. */ |
| Word16 * pit_frac, /* (o) : chosen fraction (0, 1, 2 or 3). */ |
| Word16 i_subfr, /* (i) : indicator for first subframe. */ |
| Word16 t0_fr2, /* (i) : minimum value for resolution 1/2 */ |
| Word16 t0_fr1, /* (i) : minimum value for resolution 1 */ |
| Word16 L_subfr /* (i) : Length of subframe */ |
| ); |
| void Pred_lt4( |
| Word16 exc[], /* in/out: excitation buffer */ |
| Word16 T0, /* input : integer pitch lag */ |
| Word16 frac, /* input : fraction of lag */ |
| Word16 L_subfr /* input : subframe size */ |
| ); |
| |
| void pred_lt4_asm( |
| Word16 exc[], /* in/out: excitation buffer */ |
| Word16 T0, /* input : integer pitch lag */ |
| Word16 frac, /* input : fraction of lag */ |
| Word16 L_subfr /* input : subframe size */ |
| ); |
| |
| /*-----------------------------------------------------------------* |
| * gain prototypes * |
| *-----------------------------------------------------------------*/ |
| |
| Word16 G_pitch( /* (o) Q14 : Gain of pitch lag saturated to 1.2 */ |
| Word16 xn[], /* (i) : Pitch target. */ |
| Word16 y1[], /* (i) : filtered adaptive codebook. */ |
| Word16 g_coeff[], /* : Correlations need for gain quantization. */ |
| Word16 L_subfr /* : Length of subframe. */ |
| ); |
| void Init_Q_gain2( |
| Word16 * mem /* output :static memory (2 words) */ |
| ); |
| Word16 Q_gain2( /* Return index of quantization. */ |
| Word16 xn[], /* (i) Q_xn:Target vector. */ |
| Word16 y1[], /* (i) Q_xn:Adaptive codebook. */ |
| Word16 Q_xn, /* (i) :xn and y1 format */ |
| Word16 y2[], /* (i) Q9 :Filtered innovative vector. */ |
| Word16 code[], /* (i) Q9 :Innovative vector. */ |
| Word16 g_coeff[], /* (i) :Correlations <xn y1> <y1 y1> */ |
| /* Compute in G_pitch(). */ |
| Word16 L_subfr, /* (i) :Subframe lenght. */ |
| Word16 nbits, /* (i) : number of bits (6 or 7) */ |
| Word16 * gain_pit, /* (i/o)Q14:Pitch gain. */ |
| Word32 * gain_cod, /* (o) Q16 :Code gain. */ |
| Word16 gp_clip, /* (i) : Gp Clipping flag */ |
| Word16 * mem /* (i/o) :static memory (2 words) */ |
| ); |
| |
| void Init_D_gain2( |
| Word16 * mem /* output :static memory (4 words) */ |
| ); |
| void D_gain2( |
| Word16 index, /* (i) :index of quantization. */ |
| Word16 nbits, /* (i) : number of bits (6 or 7) */ |
| Word16 code[], /* (i) Q9 :Innovative vector. */ |
| Word16 L_subfr, /* (i) :Subframe lenght. */ |
| Word16 * gain_pit, /* (o) Q14 :Pitch gain. */ |
| Word32 * gain_cod, /* (o) Q16 :Code gain. */ |
| Word16 bfi, /* (i) :bad frame indicator */ |
| Word16 prev_bfi, /* (i) : Previous BF indicator */ |
| Word16 state, /* (i) : State of BFH */ |
| Word16 unusable_frame, /* (i) : UF indicator */ |
| Word16 vad_hist, /* (i) :number of non-speech frames */ |
| Word16 * mem /* (i/o) :static memory (4 words) */ |
| ); |
| |
| /*-----------------------------------------------------------------* |
| * acelp prototypes * |
| *-----------------------------------------------------------------*/ |
| |
| void cor_h_x( |
| Word16 h[], /* (i) Q12 : impulse response of weighted synthesis filter */ |
| Word16 x[], /* (i) Q0 : target vector */ |
| Word16 dn[] /* (o) <12bit : correlation between target and h[] */ |
| ); |
| void ACELP_2t64_fx( |
| Word16 dn[], /* (i) <12b : correlation between target x[] and H[] */ |
| Word16 cn[], /* (i) <12b : residual after long term prediction */ |
| Word16 H[], /* (i) Q12: impulse response of weighted synthesis filter */ |
| Word16 code[], /* (o) Q9 : algebraic (fixed) codebook excitation */ |
| Word16 y[], /* (o) Q9 : filtered fixed codebook excitation */ |
| Word16 * index /* (o) : index (12): 5+1+5+1 = 11 bits. */ |
| ); |
| |
| void ACELP_4t64_fx( |
| Word16 dn[], /* (i) <12b : correlation between target x[] and H[] */ |
| Word16 cn[], /* (i) <12b : residual after long term prediction */ |
| Word16 H[], /* (i) Q12: impulse response of weighted synthesis filter */ |
| Word16 code[], /* (o) Q9 : algebraic (fixed) codebook excitation */ |
| Word16 y[], /* (o) Q9 : filtered fixed codebook excitation */ |
| Word16 nbbits, /* (i) : 20, 36, 44, 52, 64, 72 or 88 bits */ |
| Word16 ser_size, /* (i) : bit rate */ |
| Word16 _index[] /* (o) : index (20): 5+5+5+5 = 20 bits. */ |
| /* (o) : index (36): 9+9+9+9 = 36 bits. */ |
| /* (o) : index (44): 13+9+13+9 = 44 bits. */ |
| /* (o) : index (52): 13+13+13+13 = 52 bits. */ |
| /* (o) : index (64): 2+2+2+2+14+14+14+14 = 64 bits. */ |
| /* (o) : index (72): 10+2+10+2+10+14+10+14 = 72 bits. */ |
| /* (o) : index (88): 11+11+11+11+11+11+11+11 = 88 bits. */ |
| ); |
| |
| void Pit_shrp( |
| Word16 * x, /* in/out: impulse response (or algebraic code) */ |
| Word16 pit_lag, /* input : pitch lag */ |
| Word16 sharp, /* input : pitch sharpening factor (Q15) */ |
| Word16 L_subfr /* input : subframe size */ |
| ); |
| |
| |
| /*-----------------------------------------------------------------* |
| * others prototypes * |
| *-----------------------------------------------------------------*/ |
| |
| void Copy( |
| Word16 x[], /* (i) : input vector */ |
| Word16 y[], /* (o) : output vector */ |
| Word16 L /* (i) : vector length */ |
| ); |
| void Set_zero( |
| Word16 x[], /* (o) : vector to clear */ |
| Word16 L /* (i) : length of vector */ |
| ); |
| void Updt_tar( |
| Word16 * x, /* (i) Q0 : old target (for pitch search) */ |
| Word16 * x2, /* (o) Q0 : new target (for codebook search) */ |
| Word16 * y, /* (i) Q0 : filtered adaptive codebook vector */ |
| Word16 gain, /* (i) Q14 : adaptive codebook gain */ |
| Word16 L /* (i) : subframe size */ |
| ); |
| Word16 voice_factor( /* (o) Q15 : factor (-1=unvoiced to 1=voiced) */ |
| Word16 exc[], /* (i) Q_exc: pitch excitation */ |
| Word16 Q_exc, /* (i) : exc format */ |
| Word16 gain_pit, /* (i) Q14 : gain of pitch */ |
| Word16 code[], /* (i) Q9 : Fixed codebook excitation */ |
| Word16 gain_code, /* (i) Q0 : gain of code */ |
| Word16 L_subfr /* (i) : subframe length */ |
| ); |
| void Scale_sig( |
| Word16 x[], /* (i/o) : signal to scale */ |
| Word16 lg, /* (i) : size of x[] */ |
| Word16 exp /* (i) : exponent: x = round(x << exp) */ |
| ); |
| |
| void Scale_sig_opt( |
| Word16 x[], /* (i/o) : signal to scale */ |
| Word16 lg, /* (i) : size of x[] */ |
| Word16 exp /* (i) : exponent: x = round(x << exp) */ |
| ); |
| |
| Word16 Random(Word16 * seed); |
| |
| void Init_gp_clip( |
| Word16 mem[] /* (o) : memory of gain of pitch clipping algorithm */ |
| ); |
| Word16 Gp_clip( |
| Word16 mem[] /* (i/o) : memory of gain of pitch clipping algorithm */ |
| ); |
| void Gp_clip_test_isf( |
| Word16 isf[], /* (i) : isf values (in frequency domain) */ |
| Word16 mem[] /* (i/o) : memory of gain of pitch clipping algorithm */ |
| ); |
| void Gp_clip_test_gain_pit( |
| Word16 gain_pit, /* (i) : gain of quantized pitch */ |
| Word16 mem[] /* (i/o) : memory of gain of pitch clipping algorithm */ |
| ); |
| |
| |
| #endif //__ACELP_H__ |
| |
