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media/libopus/silk/main.h@ac0c01689b40 (annotated)

media/libopus/silk/main.h

Thu, 15 Jan 2015 15:59:08 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 15 Jan 2015 15:59:08 +0100

branch

TOR_BUG_9701

changeset 10

ac0c01689b40

permissions

-rw-r--r--

Implement a real Private Browsing Mode condition by changing the API/ABI;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

michael@0	1	/***********************************************************************
michael@0	2	Copyright (c) 2006-2011, Skype Limited. All rights reserved.
michael@0	3	Redistribution and use in source and binary forms, with or without
michael@0	4	modification, are permitted provided that the following conditions
michael@0	5	are met:
michael@0	6	- Redistributions of source code must retain the above copyright notice,
michael@0	7	this list of conditions and the following disclaimer.
michael@0	8	- Redistributions in binary form must reproduce the above copyright
michael@0	9	notice, this list of conditions and the following disclaimer in the
michael@0	10	documentation and/or other materials provided with the distribution.
michael@0	11	- Neither the name of Internet Society, IETF or IETF Trust, nor the
michael@0	12	names of specific contributors, may be used to endorse or promote
michael@0	13	products derived from this software without specific prior written
michael@0	14	permission.
michael@0	15	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
michael@0	16	AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
michael@0	17	IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
michael@0	18	ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
michael@0	19	LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
michael@0	20	CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
michael@0	21	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
michael@0	22	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
michael@0	23	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
michael@0	24	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
michael@0	25	POSSIBILITY OF SUCH DAMAGE.
michael@0	26	***********************************************************************/
michael@0	27
michael@0	28	#ifndef SILK_MAIN_H
michael@0	29	#define SILK_MAIN_H
michael@0	30
michael@0	31	#include "SigProc_FIX.h"
michael@0	32	#include "define.h"
michael@0	33	#include "structs.h"
michael@0	34	#include "tables.h"
michael@0	35	#include "PLC.h"
michael@0	36	#include "control.h"
michael@0	37	#include "debug.h"
michael@0	38	#include "entenc.h"
michael@0	39	#include "entdec.h"
michael@0	40
michael@0	41	/* Convert Left/Right stereo signal to adaptive Mid/Side representation */
michael@0	42	void silk_stereo_LR_to_MS(
michael@0	43	stereo_enc_state *state, /* I/O State */
michael@0	44	opus_int16 x1[], /* I/O Left input signal, becomes mid signal */
michael@0	45	opus_int16 x2[], /* I/O Right input signal, becomes side signal */
michael@0	46	opus_int8 ix[ 2 ][ 3 ], /* O Quantization indices */
michael@0	47	opus_int8 *mid_only_flag, /* O Flag: only mid signal coded */
michael@0	48	opus_int32 mid_side_rates_bps[], /* O Bitrates for mid and side signals */
michael@0	49	opus_int32 total_rate_bps, /* I Total bitrate */
michael@0	50	opus_int prev_speech_act_Q8, /* I Speech activity level in previous frame */
michael@0	51	opus_int toMono, /* I Last frame before a stereo->mono transition */
michael@0	52	opus_int fs_kHz, /* I Sample rate (kHz) */
michael@0	53	opus_int frame_length /* I Number of samples */
michael@0	54	);
michael@0	55
michael@0	56	/* Convert adaptive Mid/Side representation to Left/Right stereo signal */
michael@0	57	void silk_stereo_MS_to_LR(
michael@0	58	stereo_dec_state *state, /* I/O State */
michael@0	59	opus_int16 x1[], /* I/O Left input signal, becomes mid signal */
michael@0	60	opus_int16 x2[], /* I/O Right input signal, becomes side signal */
michael@0	61	const opus_int32 pred_Q13[], /* I Predictors */
michael@0	62	opus_int fs_kHz, /* I Samples rate (kHz) */
michael@0	63	opus_int frame_length /* I Number of samples */
michael@0	64	);
michael@0	65
michael@0	66	/* Find least-squares prediction gain for one signal based on another and quantize it */
michael@0	67	opus_int32 silk_stereo_find_predictor( /* O Returns predictor in Q13 */
michael@0	68	opus_int32 *ratio_Q14, /* O Ratio of residual and mid energies */
michael@0	69	const opus_int16 x[], /* I Basis signal */
michael@0	70	const opus_int16 y[], /* I Target signal */
michael@0	71	opus_int32 mid_res_amp_Q0[], /* I/O Smoothed mid, residual norms */
michael@0	72	opus_int length, /* I Number of samples */
michael@0	73	opus_int smooth_coef_Q16 /* I Smoothing coefficient */
michael@0	74	);
michael@0	75
michael@0	76	/* Quantize mid/side predictors */
michael@0	77	void silk_stereo_quant_pred(
michael@0	78	opus_int32 pred_Q13[], /* I/O Predictors (out: quantized) */
michael@0	79	opus_int8 ix[ 2 ][ 3 ] /* O Quantization indices */
michael@0	80	);
michael@0	81
michael@0	82	/* Entropy code the mid/side quantization indices */
michael@0	83	void silk_stereo_encode_pred(
michael@0	84	ec_enc *psRangeEnc, /* I/O Compressor data structure */
michael@0	85	opus_int8 ix[ 2 ][ 3 ] /* I Quantization indices */
michael@0	86	);
michael@0	87
michael@0	88	/* Entropy code the mid-only flag */
michael@0	89	void silk_stereo_encode_mid_only(
michael@0	90	ec_enc *psRangeEnc, /* I/O Compressor data structure */
michael@0	91	opus_int8 mid_only_flag
michael@0	92	);
michael@0	93
michael@0	94	/* Decode mid/side predictors */
michael@0	95	void silk_stereo_decode_pred(
michael@0	96	ec_dec *psRangeDec, /* I/O Compressor data structure */
michael@0	97	opus_int32 pred_Q13[] /* O Predictors */
michael@0	98	);
michael@0	99
michael@0	100	/* Decode mid-only flag */
michael@0	101	void silk_stereo_decode_mid_only(
michael@0	102	ec_dec *psRangeDec, /* I/O Compressor data structure */
michael@0	103	opus_int *decode_only_mid /* O Flag that only mid channel has been coded */
michael@0	104	);
michael@0	105
michael@0	106	/* Encodes signs of excitation */
michael@0	107	void silk_encode_signs(
michael@0	108	ec_enc *psRangeEnc, /* I/O Compressor data structure */
michael@0	109	const opus_int8 pulses[], /* I pulse signal */
michael@0	110	opus_int length, /* I length of input */
michael@0	111	const opus_int signalType, /* I Signal type */
michael@0	112	const opus_int quantOffsetType, /* I Quantization offset type */
michael@0	113	const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */
michael@0	114	);
michael@0	115
michael@0	116	/* Decodes signs of excitation */
michael@0	117	void silk_decode_signs(
michael@0	118	ec_dec *psRangeDec, /* I/O Compressor data structure */
michael@0	119	opus_int pulses[], /* I/O pulse signal */
michael@0	120	opus_int length, /* I length of input */
michael@0	121	const opus_int signalType, /* I Signal type */
michael@0	122	const opus_int quantOffsetType, /* I Quantization offset type */
michael@0	123	const opus_int sum_pulses[ MAX_NB_SHELL_BLOCKS ] /* I Sum of absolute pulses per block */
michael@0	124	);
michael@0	125
michael@0	126	/* Check encoder control struct */
michael@0	127	opus_int check_control_input(
michael@0	128	silk_EncControlStruct *encControl /* I Control structure */
michael@0	129	);
michael@0	130
michael@0	131	/* Control internal sampling rate */
michael@0	132	opus_int silk_control_audio_bandwidth(
michael@0	133	silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */
michael@0	134	silk_EncControlStruct *encControl /* I Control structure */
michael@0	135	);
michael@0	136
michael@0	137	/* Control SNR of redidual quantizer */
michael@0	138	opus_int silk_control_SNR(
michael@0	139	silk_encoder_state *psEncC, /* I/O Pointer to Silk encoder state */
michael@0	140	opus_int32 TargetRate_bps /* I Target max bitrate (bps) */
michael@0	141	);
michael@0	142
michael@0	143	/***************/
michael@0	144	/* Shell coder */
michael@0	145	/***************/
michael@0	146
michael@0	147	/* Encode quantization indices of excitation */
michael@0	148	void silk_encode_pulses(
michael@0	149	ec_enc *psRangeEnc, /* I/O compressor data structure */
michael@0	150	const opus_int signalType, /* I Signal type */
michael@0	151	const opus_int quantOffsetType, /* I quantOffsetType */
michael@0	152	opus_int8 pulses[], /* I quantization indices */
michael@0	153	const opus_int frame_length /* I Frame length */
michael@0	154	);
michael@0	155
michael@0	156	/* Shell encoder, operates on one shell code frame of 16 pulses */
michael@0	157	void silk_shell_encoder(
michael@0	158	ec_enc *psRangeEnc, /* I/O compressor data structure */
michael@0	159	const opus_int *pulses0 /* I data: nonnegative pulse amplitudes */
michael@0	160	);
michael@0	161
michael@0	162	/* Shell decoder, operates on one shell code frame of 16 pulses */
michael@0	163	void silk_shell_decoder(
michael@0	164	opus_int *pulses0, /* O data: nonnegative pulse amplitudes */
michael@0	165	ec_dec *psRangeDec, /* I/O Compressor data structure */
michael@0	166	const opus_int pulses4 /* I number of pulses per pulse-subframe */
michael@0	167	);
michael@0	168
michael@0	169	/* Gain scalar quantization with hysteresis, uniform on log scale */
michael@0	170	void silk_gains_quant(
michael@0	171	opus_int8 ind[ MAX_NB_SUBFR ], /* O gain indices */
michael@0	172	opus_int32 gain_Q16[ MAX_NB_SUBFR ], /* I/O gains (quantized out) */
michael@0	173	opus_int8 *prev_ind, /* I/O last index in previous frame */
michael@0	174	const opus_int conditional, /* I first gain is delta coded if 1 */
michael@0	175	const opus_int nb_subfr /* I number of subframes */
michael@0	176	);
michael@0	177
michael@0	178	/* Gains scalar dequantization, uniform on log scale */
michael@0	179	void silk_gains_dequant(
michael@0	180	opus_int32 gain_Q16[ MAX_NB_SUBFR ], /* O quantized gains */
michael@0	181	const opus_int8 ind[ MAX_NB_SUBFR ], /* I gain indices */
michael@0	182	opus_int8 *prev_ind, /* I/O last index in previous frame */
michael@0	183	const opus_int conditional, /* I first gain is delta coded if 1 */
michael@0	184	const opus_int nb_subfr /* I number of subframes */
michael@0	185	);
michael@0	186
michael@0	187	/* Compute unique identifier of gain indices vector */
michael@0	188	opus_int32 silk_gains_ID( /* O returns unique identifier of gains */
michael@0	189	const opus_int8 ind[ MAX_NB_SUBFR ], /* I gain indices */
michael@0	190	const opus_int nb_subfr /* I number of subframes */
michael@0	191	);
michael@0	192
michael@0	193	/* Interpolate two vectors */
michael@0	194	void silk_interpolate(
michael@0	195	opus_int16 xi[ MAX_LPC_ORDER ], /* O interpolated vector */
michael@0	196	const opus_int16 x0[ MAX_LPC_ORDER ], /* I first vector */
michael@0	197	const opus_int16 x1[ MAX_LPC_ORDER ], /* I second vector */
michael@0	198	const opus_int ifact_Q2, /* I interp. factor, weight on 2nd vector */
michael@0	199	const opus_int d /* I number of parameters */
michael@0	200	);
michael@0	201
michael@0	202	/* LTP tap quantizer */
michael@0	203	void silk_quant_LTP_gains(
michael@0	204	opus_int16 B_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (un)quantized LTP gains */
michael@0	205	opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook Index */
michael@0	206	opus_int8 *periodicity_index, /* O Periodicity Index */
michael@0	207	opus_int32 *sum_gain_dB_Q7, /* I/O Cumulative max prediction gain */
michael@0	208	const opus_int32 W_Q18[ MAX_NB_SUBFR*LTP_ORDER*LTP_ORDER ], /* I Error Weights in Q18 */
michael@0	209	opus_int mu_Q9, /* I Mu value (R/D tradeoff) */
michael@0	210	opus_int lowComplexity, /* I Flag for low complexity */
michael@0	211	const opus_int nb_subfr /* I number of subframes */
michael@0	212	);
michael@0	213
michael@0	214	/* Entropy constrained matrix-weighted VQ, for a single input data vector */
michael@0	215	void silk_VQ_WMat_EC(
michael@0	216	opus_int8 *ind, /* O index of best codebook vector */
michael@0	217	opus_int32 *rate_dist_Q14, /* O best weighted quant error + mu * rate */
michael@0	218	opus_int *gain_Q7, /* O sum of absolute LTP coefficients */
michael@0	219	const opus_int16 *in_Q14, /* I input vector to be quantized */
michael@0	220	const opus_int32 *W_Q18, /* I weighting matrix */
michael@0	221	const opus_int8 *cb_Q7, /* I codebook */
michael@0	222	const opus_uint8 *cb_gain_Q7, /* I codebook effective gain */
michael@0	223	const opus_uint8 *cl_Q5, /* I code length for each codebook vector */
michael@0	224	const opus_int mu_Q9, /* I tradeoff betw. weighted error and rate */
michael@0	225	const opus_int32 max_gain_Q7, /* I maximum sum of absolute LTP coefficients */
michael@0	226	opus_int L /* I number of vectors in codebook */
michael@0	227	);
michael@0	228
michael@0	229	/************************************/
michael@0	230	/* Noise shaping quantization (NSQ) */
michael@0	231	/************************************/
michael@0	232	void silk_NSQ(
michael@0	233	const silk_encoder_state *psEncC, /* I/O Encoder State */
michael@0	234	silk_nsq_state *NSQ, /* I/O NSQ state */
michael@0	235	SideInfoIndices *psIndices, /* I/O Quantization Indices */
michael@0	236	const opus_int32 x_Q3[], /* I Prefiltered input signal */
michael@0	237	opus_int8 pulses[], /* O Quantized pulse signal */
michael@0	238	const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefs */
michael@0	239	const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */
michael@0	240	const opus_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */
michael@0	241	const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */
michael@0	242	const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */
michael@0	243	const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */
michael@0	244	const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */
michael@0	245	const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */
michael@0	246	const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */
michael@0	247	const opus_int LTP_scale_Q14 /* I LTP state scaling */
michael@0	248	);
michael@0	249
michael@0	250	/* Noise shaping using delayed decision */
michael@0	251	void silk_NSQ_del_dec(
michael@0	252	const silk_encoder_state *psEncC, /* I/O Encoder State */
michael@0	253	silk_nsq_state *NSQ, /* I/O NSQ state */
michael@0	254	SideInfoIndices *psIndices, /* I/O Quantization Indices */
michael@0	255	const opus_int32 x_Q3[], /* I Prefiltered input signal */
michael@0	256	opus_int8 pulses[], /* O Quantized pulse signal */
michael@0	257	const opus_int16 PredCoef_Q12[ 2 * MAX_LPC_ORDER ], /* I Short term prediction coefs */
michael@0	258	const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ], /* I Long term prediction coefs */
michael@0	259	const opus_int16 AR2_Q13[ MAX_NB_SUBFR * MAX_SHAPE_LPC_ORDER ], /* I Noise shaping coefs */
michael@0	260	const opus_int HarmShapeGain_Q14[ MAX_NB_SUBFR ], /* I Long term shaping coefs */
michael@0	261	const opus_int Tilt_Q14[ MAX_NB_SUBFR ], /* I Spectral tilt */
michael@0	262	const opus_int32 LF_shp_Q14[ MAX_NB_SUBFR ], /* I Low frequency shaping coefs */
michael@0	263	const opus_int32 Gains_Q16[ MAX_NB_SUBFR ], /* I Quantization step sizes */
michael@0	264	const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */
michael@0	265	const opus_int Lambda_Q10, /* I Rate/distortion tradeoff */
michael@0	266	const opus_int LTP_scale_Q14 /* I LTP state scaling */
michael@0	267	);
michael@0	268
michael@0	269	/************/
michael@0	270	/* Silk VAD */
michael@0	271	/************/
michael@0	272	/* Initialize the Silk VAD */
michael@0	273	opus_int silk_VAD_Init( /* O Return value, 0 if success */
michael@0	274	silk_VAD_state *psSilk_VAD /* I/O Pointer to Silk VAD state */
michael@0	275	);
michael@0	276
michael@0	277	/* Get speech activity level in Q8 */
michael@0	278	opus_int silk_VAD_GetSA_Q8( /* O Return value, 0 if success */
michael@0	279	silk_encoder_state *psEncC, /* I/O Encoder state */
michael@0	280	const opus_int16 pIn[] /* I PCM input */
michael@0	281	);
michael@0	282
michael@0	283	/* Low-pass filter with variable cutoff frequency based on */
michael@0	284	/* piece-wise linear interpolation between elliptic filters */
michael@0	285	/* Start by setting transition_frame_no = 1; */
michael@0	286	void silk_LP_variable_cutoff(
michael@0	287	silk_LP_state *psLP, /* I/O LP filter state */
michael@0	288	opus_int16 *frame, /* I/O Low-pass filtered output signal */
michael@0	289	const opus_int frame_length /* I Frame length */
michael@0	290	);
michael@0	291
michael@0	292	/******************/
michael@0	293	/* NLSF Quantizer */
michael@0	294	/******************/
michael@0	295	/* Limit, stabilize, convert and quantize NLSFs */
michael@0	296	void silk_process_NLSFs(
michael@0	297	silk_encoder_state *psEncC, /* I/O Encoder state */
michael@0	298	opus_int16 PredCoef_Q12[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
michael@0	299	opus_int16 pNLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
michael@0	300	const opus_int16 prev_NLSFq_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
michael@0	301	);
michael@0	302
michael@0	303	opus_int32 silk_NLSF_encode( /* O Returns RD value in Q25 */
michael@0	304	opus_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */
michael@0	305	opus_int16 *pNLSF_Q15, /* I/O Quantized NLSF vector [ LPC_ORDER ] */
michael@0	306	const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */
michael@0	307	const opus_int16 *pW_QW, /* I NLSF weight vector [ LPC_ORDER ] */
michael@0	308	const opus_int NLSF_mu_Q20, /* I Rate weight for the RD optimization */
michael@0	309	const opus_int nSurvivors, /* I Max survivors after first stage */
michael@0	310	const opus_int signalType /* I Signal type: 0/1/2 */
michael@0	311	);
michael@0	312
michael@0	313	/* Compute quantization errors for an LPC_order element input vector for a VQ codebook */
michael@0	314	void silk_NLSF_VQ(
michael@0	315	opus_int32 err_Q26[], /* O Quantization errors [K] */
michael@0	316	const opus_int16 in_Q15[], /* I Input vectors to be quantized [LPC_order] */
michael@0	317	const opus_uint8 pCB_Q8[], /* I Codebook vectors [K*LPC_order] */
michael@0	318	const opus_int K, /* I Number of codebook vectors */
michael@0	319	const opus_int LPC_order /* I Number of LPCs */
michael@0	320	);
michael@0	321
michael@0	322	/* Delayed-decision quantizer for NLSF residuals */
michael@0	323	opus_int32 silk_NLSF_del_dec_quant( /* O Returns RD value in Q25 */
michael@0	324	opus_int8 indices[], /* O Quantization indices [ order ] */
michael@0	325	const opus_int16 x_Q10[], /* I Input [ order ] */
michael@0	326	const opus_int16 w_Q5[], /* I Weights [ order ] */
michael@0	327	const opus_uint8 pred_coef_Q8[], /* I Backward predictor coefs [ order ] */
michael@0	328	const opus_int16 ec_ix[], /* I Indices to entropy coding tables [ order ] */
michael@0	329	const opus_uint8 ec_rates_Q5[], /* I Rates [] */
michael@0	330	const opus_int quant_step_size_Q16, /* I Quantization step size */
michael@0	331	const opus_int16 inv_quant_step_size_Q6, /* I Inverse quantization step size */
michael@0	332	const opus_int32 mu_Q20, /* I R/D tradeoff */
michael@0	333	const opus_int16 order /* I Number of input values */
michael@0	334	);
michael@0	335
michael@0	336	/* Unpack predictor values and indices for entropy coding tables */
michael@0	337	void silk_NLSF_unpack(
michael@0	338	opus_int16 ec_ix[], /* O Indices to entropy tables [ LPC_ORDER ] */
michael@0	339	opus_uint8 pred_Q8[], /* O LSF predictor [ LPC_ORDER ] */
michael@0	340	const silk_NLSF_CB_struct *psNLSF_CB, /* I Codebook object */
michael@0	341	const opus_int CB1_index /* I Index of vector in first LSF codebook */
michael@0	342	);
michael@0	343
michael@0	344	/***********************/
michael@0	345	/* NLSF vector decoder */
michael@0	346	/***********************/
michael@0	347	void silk_NLSF_decode(
michael@0	348	opus_int16 *pNLSF_Q15, /* O Quantized NLSF vector [ LPC_ORDER ] */
michael@0	349	opus_int8 *NLSFIndices, /* I Codebook path vector [ LPC_ORDER + 1 ] */
michael@0	350	const silk_NLSF_CB_struct *psNLSF_CB /* I Codebook object */
michael@0	351	);
michael@0	352
michael@0	353	/****************************************************/
michael@0	354	/* Decoder Functions */
michael@0	355	/****************************************************/
michael@0	356	opus_int silk_init_decoder(
michael@0	357	silk_decoder_state *psDec /* I/O Decoder state pointer */
michael@0	358	);
michael@0	359
michael@0	360	/* Set decoder sampling rate */
michael@0	361	opus_int silk_decoder_set_fs(
michael@0	362	silk_decoder_state *psDec, /* I/O Decoder state pointer */
michael@0	363	opus_int fs_kHz, /* I Sampling frequency (kHz) */
michael@0	364	opus_int32 fs_API_Hz /* I API Sampling frequency (Hz) */
michael@0	365	);
michael@0	366
michael@0	367	/****************/
michael@0	368	/* Decode frame */
michael@0	369	/****************/
michael@0	370	opus_int silk_decode_frame(
michael@0	371	silk_decoder_state *psDec, /* I/O Pointer to Silk decoder state */
michael@0	372	ec_dec *psRangeDec, /* I/O Compressor data structure */
michael@0	373	opus_int16 pOut[], /* O Pointer to output speech frame */
michael@0	374	opus_int32 *pN, /* O Pointer to size of output frame */
michael@0	375	opus_int lostFlag, /* I 0: no loss, 1 loss, 2 decode fec */
michael@0	376	opus_int condCoding /* I The type of conditional coding to use */
michael@0	377	);
michael@0	378
michael@0	379	/* Decode indices from bitstream */
michael@0	380	void silk_decode_indices(
michael@0	381	silk_decoder_state *psDec, /* I/O State */
michael@0	382	ec_dec *psRangeDec, /* I/O Compressor data structure */
michael@0	383	opus_int FrameIndex, /* I Frame number */
michael@0	384	opus_int decode_LBRR, /* I Flag indicating LBRR data is being decoded */
michael@0	385	opus_int condCoding /* I The type of conditional coding to use */
michael@0	386	);
michael@0	387
michael@0	388	/* Decode parameters from payload */
michael@0	389	void silk_decode_parameters(
michael@0	390	silk_decoder_state *psDec, /* I/O State */
michael@0	391	silk_decoder_control *psDecCtrl, /* I/O Decoder control */
michael@0	392	opus_int condCoding /* I The type of conditional coding to use */
michael@0	393	);
michael@0	394
michael@0	395	/* Core decoder. Performs inverse NSQ operation LTP + LPC */
michael@0	396	void silk_decode_core(
michael@0	397	silk_decoder_state *psDec, /* I/O Decoder state */
michael@0	398	silk_decoder_control *psDecCtrl, /* I Decoder control */
michael@0	399	opus_int16 xq[], /* O Decoded speech */
michael@0	400	const opus_int pulses[ MAX_FRAME_LENGTH ] /* I Pulse signal */
michael@0	401	);
michael@0	402
michael@0	403	/* Decode quantization indices of excitation (Shell coding) */
michael@0	404	void silk_decode_pulses(
michael@0	405	ec_dec *psRangeDec, /* I/O Compressor data structure */
michael@0	406	opus_int pulses[], /* O Excitation signal */
michael@0	407	const opus_int signalType, /* I Sigtype */
michael@0	408	const opus_int quantOffsetType, /* I quantOffsetType */
michael@0	409	const opus_int frame_length /* I Frame length */
michael@0	410	);
michael@0	411
michael@0	412	/******************/
michael@0	413	/* CNG */
michael@0	414	/******************/
michael@0	415
michael@0	416	/* Reset CNG */
michael@0	417	void silk_CNG_Reset(
michael@0	418	silk_decoder_state *psDec /* I/O Decoder state */
michael@0	419	);
michael@0	420
michael@0	421	/* Updates CNG estimate, and applies the CNG when packet was lost */
michael@0	422	void silk_CNG(
michael@0	423	silk_decoder_state *psDec, /* I/O Decoder state */
michael@0	424	silk_decoder_control *psDecCtrl, /* I/O Decoder control */
michael@0	425	opus_int16 frame[], /* I/O Signal */
michael@0	426	opus_int length /* I Length of residual */
michael@0	427	);
michael@0	428
michael@0	429	/* Encoding of various parameters */
michael@0	430	void silk_encode_indices(
michael@0	431	silk_encoder_state *psEncC, /* I/O Encoder state */
michael@0	432	ec_enc *psRangeEnc, /* I/O Compressor data structure */
michael@0	433	opus_int FrameIndex, /* I Frame number */
michael@0	434	opus_int encode_LBRR, /* I Flag indicating LBRR data is being encoded */
michael@0	435	opus_int condCoding /* I The type of conditional coding to use */
michael@0	436	);
michael@0	437
michael@0	438	#endif