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media/libopus/silk/float/main_FLP.h@b8a032363ba2 (annotated)

media/libopus/silk/float/main_FLP.h

Thu, 22 Jan 2015 13:21:57 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Thu, 22 Jan 2015 13:21:57 +0100

branch

TOR_BUG_9701

changeset 15

b8a032363ba2

permissions

-rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

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_FLP_H
michael@0	29	#define SILK_MAIN_FLP_H
michael@0	30
michael@0	31	#include "SigProc_FLP.h"
michael@0	32	#include "SigProc_FIX.h"
michael@0	33	#include "structs_FLP.h"
michael@0	34	#include "main.h"
michael@0	35	#include "define.h"
michael@0	36	#include "debug.h"
michael@0	37	#include "entenc.h"
michael@0	38
michael@0	39	#ifdef __cplusplus
michael@0	40	extern "C"
michael@0	41	{
michael@0	42	#endif
michael@0	43
michael@0	44	#define silk_encoder_state_Fxx silk_encoder_state_FLP
michael@0	45	#define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FLP
michael@0	46	#define silk_encode_frame_Fxx silk_encode_frame_FLP
michael@0	47
michael@0	48	/*********************/
michael@0	49	/* Encoder Functions */
michael@0	50	/*********************/
michael@0	51
michael@0	52	/* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */
michael@0	53	void silk_HP_variable_cutoff(
michael@0	54	silk_encoder_state_Fxx state_Fxx[] /* I/O Encoder states */
michael@0	55	);
michael@0	56
michael@0	57	/* Encoder main function */
michael@0	58	void silk_encode_do_VAD_FLP(
michael@0	59	silk_encoder_state_FLP *psEnc /* I/O Encoder state FLP */
michael@0	60	);
michael@0	61
michael@0	62	/* Encoder main function */
michael@0	63	opus_int silk_encode_frame_FLP(
michael@0	64	silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
michael@0	65	opus_int32 *pnBytesOut, /* O Number of payload bytes; */
michael@0	66	ec_enc *psRangeEnc, /* I/O compressor data structure */
michael@0	67	opus_int condCoding, /* I The type of conditional coding to use */
michael@0	68	opus_int maxBits, /* I If > 0: maximum number of output bits */
michael@0	69	opus_int useCBR /* I Flag to force constant-bitrate operation */
michael@0	70	);
michael@0	71
michael@0	72	/* Initializes the Silk encoder state */
michael@0	73	opus_int silk_init_encoder(
michael@0	74	silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
michael@0	75	int arch /* I Run-tim architecture */
michael@0	76	);
michael@0	77
michael@0	78	/* Control the Silk encoder */
michael@0	79	opus_int silk_control_encoder(
michael@0	80	silk_encoder_state_FLP *psEnc, /* I/O Pointer to Silk encoder state FLP */
michael@0	81	silk_EncControlStruct *encControl, /* I Control structure */
michael@0	82	const opus_int32 TargetRate_bps, /* I Target max bitrate (bps) */
michael@0	83	const opus_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */
michael@0	84	const opus_int channelNb, /* I Channel number */
michael@0	85	const opus_int force_fs_kHz
michael@0	86	);
michael@0	87
michael@0	88	/****************/
michael@0	89	/* Prefiltering */
michael@0	90	/****************/
michael@0	91	void silk_prefilter_FLP(
michael@0	92	silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
michael@0	93	const silk_encoder_control_FLP *psEncCtrl, /* I Encoder control FLP */
michael@0	94	silk_float xw[], /* O Weighted signal */
michael@0	95	const silk_float x[] /* I Speech signal */
michael@0	96	);
michael@0	97
michael@0	98	/**************************/
michael@0	99	/* Noise shaping analysis */
michael@0	100	/**************************/
michael@0	101	/* Compute noise shaping coefficients and initial gain values */
michael@0	102	void silk_noise_shape_analysis_FLP(
michael@0	103	silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
michael@0	104	silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
michael@0	105	const silk_float *pitch_res, /* I LPC residual from pitch analysis */
michael@0	106	const silk_float *x /* I Input signal [frame_length + la_shape] */
michael@0	107	);
michael@0	108
michael@0	109	/* Autocorrelations for a warped frequency axis */
michael@0	110	void silk_warped_autocorrelation_FLP(
michael@0	111	silk_float *corr, /* O Result [order + 1] */
michael@0	112	const silk_float *input, /* I Input data to correlate */
michael@0	113	const silk_float warping, /* I Warping coefficient */
michael@0	114	const opus_int length, /* I Length of input */
michael@0	115	const opus_int order /* I Correlation order (even) */
michael@0	116	);
michael@0	117
michael@0	118	/* Calculation of LTP state scaling */
michael@0	119	void silk_LTP_scale_ctrl_FLP(
michael@0	120	silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
michael@0	121	silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
michael@0	122	opus_int condCoding /* I The type of conditional coding to use */
michael@0	123	);
michael@0	124
michael@0	125	/**********************************************/
michael@0	126	/* Prediction Analysis */
michael@0	127	/**********************************************/
michael@0	128	/* Find pitch lags */
michael@0	129	void silk_find_pitch_lags_FLP(
michael@0	130	silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
michael@0	131	silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
michael@0	132	silk_float res[], /* O Residual */
michael@0	133	const silk_float x[], /* I Speech signal */
michael@0	134	int arch /* I Run-time architecture */
michael@0	135	);
michael@0	136
michael@0	137	/* Find LPC and LTP coefficients */
michael@0	138	void silk_find_pred_coefs_FLP(
michael@0	139	silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
michael@0	140	silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
michael@0	141	const silk_float res_pitch[], /* I Residual from pitch analysis */
michael@0	142	const silk_float x[], /* I Speech signal */
michael@0	143	opus_int condCoding /* I The type of conditional coding to use */
michael@0	144	);
michael@0	145
michael@0	146	/* LPC analysis */
michael@0	147	void silk_find_LPC_FLP(
michael@0	148	silk_encoder_state *psEncC, /* I/O Encoder state */
michael@0	149	opus_int16 NLSF_Q15[], /* O NLSFs */
michael@0	150	const silk_float x[], /* I Input signal */
michael@0	151	const silk_float minInvGain /* I Prediction gain from LTP (dB) */
michael@0	152	);
michael@0	153
michael@0	154	/* LTP analysis */
michael@0	155	void silk_find_LTP_FLP(
michael@0	156	silk_float b[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
michael@0	157	silk_float WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
michael@0	158	silk_float *LTPredCodGain, /* O LTP coding gain */
michael@0	159	const silk_float r_lpc[], /* I LPC residual */
michael@0	160	const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
michael@0	161	const silk_float Wght[ MAX_NB_SUBFR ], /* I Weights */
michael@0	162	const opus_int subfr_length, /* I Subframe length */
michael@0	163	const opus_int nb_subfr, /* I number of subframes */
michael@0	164	const opus_int mem_offset /* I Number of samples in LTP memory */
michael@0	165	);
michael@0	166
michael@0	167	void silk_LTP_analysis_filter_FLP(
michael@0	168	silk_float *LTP_res, /* O LTP res MAX_NB_SUBFR*(pre_lgth+subfr_lngth) */
michael@0	169	const silk_float *x, /* I Input signal, with preceding samples */
michael@0	170	const silk_float B[ LTP_ORDER * MAX_NB_SUBFR ], /* I LTP coefficients for each subframe */
michael@0	171	const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lags */
michael@0	172	const silk_float invGains[ MAX_NB_SUBFR ], /* I Inverse quantization gains */
michael@0	173	const opus_int subfr_length, /* I Length of each subframe */
michael@0	174	const opus_int nb_subfr, /* I number of subframes */
michael@0	175	const opus_int pre_length /* I Preceding samples for each subframe */
michael@0	176	);
michael@0	177
michael@0	178	/* Calculates residual energies of input subframes where all subframes have LPC_order */
michael@0	179	/* of preceding samples */
michael@0	180	void silk_residual_energy_FLP(
michael@0	181	silk_float nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
michael@0	182	const silk_float x[], /* I Input signal */
michael@0	183	silk_float a[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
michael@0	184	const silk_float gains[], /* I Quantization gains */
michael@0	185	const opus_int subfr_length, /* I Subframe length */
michael@0	186	const opus_int nb_subfr, /* I number of subframes */
michael@0	187	const opus_int LPC_order /* I LPC order */
michael@0	188	);
michael@0	189
michael@0	190	/* 16th order LPC analysis filter */
michael@0	191	void silk_LPC_analysis_filter_FLP(
michael@0	192	silk_float r_LPC[], /* O LPC residual signal */
michael@0	193	const silk_float PredCoef[], /* I LPC coefficients */
michael@0	194	const silk_float s[], /* I Input signal */
michael@0	195	const opus_int length, /* I Length of input signal */
michael@0	196	const opus_int Order /* I LPC order */
michael@0	197	);
michael@0	198
michael@0	199	/* LTP tap quantizer */
michael@0	200	void silk_quant_LTP_gains_FLP(
michael@0	201	silk_float B[ MAX_NB_SUBFR * LTP_ORDER ], /* I/O (Un-)quantized LTP gains */
michael@0	202	opus_int8 cbk_index[ MAX_NB_SUBFR ], /* O Codebook index */
michael@0	203	opus_int8 *periodicity_index, /* O Periodicity index */
michael@0	204	opus_int32 *sum_log_gain_Q7, /* I/O Cumulative max prediction gain */
michael@0	205	const silk_float W[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* I Error weights */
michael@0	206	const opus_int mu_Q10, /* I Mu value (R/D tradeoff) */
michael@0	207	const opus_int lowComplexity, /* I Flag for low complexity */
michael@0	208	const opus_int nb_subfr /* I number of subframes */
michael@0	209	);
michael@0	210
michael@0	211	/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
michael@0	212	silk_float silk_residual_energy_covar_FLP( /* O Weighted residual energy */
michael@0	213	const silk_float *c, /* I Filter coefficients */
michael@0	214	silk_float *wXX, /* I/O Weighted correlation matrix, reg. out */
michael@0	215	const silk_float *wXx, /* I Weighted correlation vector */
michael@0	216	const silk_float wxx, /* I Weighted correlation value */
michael@0	217	const opus_int D /* I Dimension */
michael@0	218	);
michael@0	219
michael@0	220	/* Processing of gains */
michael@0	221	void silk_process_gains_FLP(
michael@0	222	silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
michael@0	223	silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
michael@0	224	opus_int condCoding /* I The type of conditional coding to use */
michael@0	225	);
michael@0	226
michael@0	227	/******************/
michael@0	228	/* Linear Algebra */
michael@0	229	/******************/
michael@0	230	/* Calculates correlation matrix X'*X */
michael@0	231	void silk_corrMatrix_FLP(
michael@0	232	const silk_float *x, /* I x vector [ L+order-1 ] used to create X */
michael@0	233	const opus_int L, /* I Length of vectors */
michael@0	234	const opus_int Order, /* I Max lag for correlation */
michael@0	235	silk_float *XX /* O X'*X correlation matrix [order x order] */
michael@0	236	);
michael@0	237
michael@0	238	/* Calculates correlation vector X'*t */
michael@0	239	void silk_corrVector_FLP(
michael@0	240	const silk_float *x, /* I x vector [L+order-1] used to create X */
michael@0	241	const silk_float *t, /* I Target vector [L] */
michael@0	242	const opus_int L, /* I Length of vecors */
michael@0	243	const opus_int Order, /* I Max lag for correlation */
michael@0	244	silk_float *Xt /* O X'*t correlation vector [order] */
michael@0	245	);
michael@0	246
michael@0	247	/* Add noise to matrix diagonal */
michael@0	248	void silk_regularize_correlations_FLP(
michael@0	249	silk_float *XX, /* I/O Correlation matrices */
michael@0	250	silk_float *xx, /* I/O Correlation values */
michael@0	251	const silk_float noise, /* I Noise energy to add */
michael@0	252	const opus_int D /* I Dimension of XX */
michael@0	253	);
michael@0	254
michael@0	255	/* Function to solve linear equation Ax = b, where A is an MxM symmetric matrix */
michael@0	256	void silk_solve_LDL_FLP(
michael@0	257	silk_float *A, /* I/O Symmetric square matrix, out: reg. */
michael@0	258	const opus_int M, /* I Size of matrix */
michael@0	259	const silk_float *b, /* I Pointer to b vector */
michael@0	260	silk_float *x /* O Pointer to x solution vector */
michael@0	261	);
michael@0	262
michael@0	263	/* Apply sine window to signal vector. */
michael@0	264	/* Window types: */
michael@0	265	/* 1 -> sine window from 0 to pi/2 */
michael@0	266	/* 2 -> sine window from pi/2 to pi */
michael@0	267	void silk_apply_sine_window_FLP(
michael@0	268	silk_float px_win[], /* O Pointer to windowed signal */
michael@0	269	const silk_float px[], /* I Pointer to input signal */
michael@0	270	const opus_int win_type, /* I Selects a window type */
michael@0	271	const opus_int length /* I Window length, multiple of 4 */
michael@0	272	);
michael@0	273
michael@0	274	/* Wrapper functions. Call flp / fix code */
michael@0	275
michael@0	276	/* Convert AR filter coefficients to NLSF parameters */
michael@0	277	void silk_A2NLSF_FLP(
michael@0	278	opus_int16 *NLSF_Q15, /* O NLSF vector [ LPC_order ] */
michael@0	279	const silk_float *pAR, /* I LPC coefficients [ LPC_order ] */
michael@0	280	const opus_int LPC_order /* I LPC order */
michael@0	281	);
michael@0	282
michael@0	283	/* Convert NLSF parameters to AR prediction filter coefficients */
michael@0	284	void silk_NLSF2A_FLP(
michael@0	285	silk_float *pAR, /* O LPC coefficients [ LPC_order ] */
michael@0	286	const opus_int16 *NLSF_Q15, /* I NLSF vector [ LPC_order ] */
michael@0	287	const opus_int LPC_order /* I LPC order */
michael@0	288	);
michael@0	289
michael@0	290	/* Limit, stabilize, and quantize NLSFs */
michael@0	291	void silk_process_NLSFs_FLP(
michael@0	292	silk_encoder_state *psEncC, /* I/O Encoder state */
michael@0	293	silk_float PredCoef[ 2 ][ MAX_LPC_ORDER ], /* O Prediction coefficients */
michael@0	294	opus_int16 NLSF_Q15[ MAX_LPC_ORDER ], /* I/O Normalized LSFs (quant out) (0 - (2^15-1)) */
michael@0	295	const opus_int16 prev_NLSF_Q15[ MAX_LPC_ORDER ] /* I Previous Normalized LSFs (0 - (2^15-1)) */
michael@0	296	);
michael@0	297
michael@0	298	/* Floating-point Silk NSQ wrapper */
michael@0	299	void silk_NSQ_wrapper_FLP(
michael@0	300	silk_encoder_state_FLP *psEnc, /* I/O Encoder state FLP */
michael@0	301	silk_encoder_control_FLP *psEncCtrl, /* I/O Encoder control FLP */
michael@0	302	SideInfoIndices *psIndices, /* I/O Quantization indices */
michael@0	303	silk_nsq_state *psNSQ, /* I/O Noise Shaping Quantzation state */
michael@0	304	opus_int8 pulses[], /* O Quantized pulse signal */
michael@0	305	const silk_float x[] /* I Prefiltered input signal */
michael@0	306	);
michael@0	307
michael@0	308	#ifdef __cplusplus
michael@0	309	}
michael@0	310	#endif
michael@0	311
michael@0	312	#endif