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media/libopus/silk/fixed/main_FIX.h@6474c204b198 (annotated)

media/libopus/silk/fixed/main_FIX.h

Wed, 31 Dec 2014 06:09:35 +0100

author

Michael Schloh von Bennewitz <michael@schloh.com>

date

Wed, 31 Dec 2014 06:09:35 +0100

changeset 0

6474c204b198

permissions

-rw-r--r--

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

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_FIX_H
michael@0	29	#define SILK_MAIN_FIX_H
michael@0	30
michael@0	31	#include "SigProc_FIX.h"
michael@0	32	#include "structs_FIX.h"
michael@0	33	#include "control.h"
michael@0	34	#include "main.h"
michael@0	35	#include "PLC.h"
michael@0	36	#include "debug.h"
michael@0	37	#include "entenc.h"
michael@0	38
michael@0	39	#ifndef FORCE_CPP_BUILD
michael@0	40	#ifdef __cplusplus
michael@0	41	extern "C"
michael@0	42	{
michael@0	43	#endif
michael@0	44	#endif
michael@0	45
michael@0	46	#define silk_encoder_state_Fxx silk_encoder_state_FIX
michael@0	47	#define silk_encode_do_VAD_Fxx silk_encode_do_VAD_FIX
michael@0	48	#define silk_encode_frame_Fxx silk_encode_frame_FIX
michael@0	49
michael@0	50	/*********************/
michael@0	51	/* Encoder Functions */
michael@0	52	/*********************/
michael@0	53
michael@0	54	/* High-pass filter with cutoff frequency adaptation based on pitch lag statistics */
michael@0	55	void silk_HP_variable_cutoff(
michael@0	56	silk_encoder_state_Fxx state_Fxx[] /* I/O Encoder states */
michael@0	57	);
michael@0	58
michael@0	59	/* Encoder main function */
michael@0	60	void silk_encode_do_VAD_FIX(
michael@0	61	silk_encoder_state_FIX *psEnc /* I/O Pointer to Silk FIX encoder state */
michael@0	62	);
michael@0	63
michael@0	64	/* Encoder main function */
michael@0	65	opus_int silk_encode_frame_FIX(
michael@0	66	silk_encoder_state_FIX *psEnc, /* I/O Pointer to Silk FIX encoder state */
michael@0	67	opus_int32 *pnBytesOut, /* O Pointer to number of payload bytes; */
michael@0	68	ec_enc *psRangeEnc, /* I/O compressor data structure */
michael@0	69	opus_int condCoding, /* I The type of conditional coding to use */
michael@0	70	opus_int maxBits, /* I If > 0: maximum number of output bits */
michael@0	71	opus_int useCBR /* I Flag to force constant-bitrate operation */
michael@0	72	);
michael@0	73
michael@0	74	/* Initializes the Silk encoder state */
michael@0	75	opus_int silk_init_encoder(
michael@0	76	silk_encoder_state_Fxx *psEnc, /* I/O Pointer to Silk FIX encoder state */
michael@0	77	int arch /* I Run-time architecture */
michael@0	78	);
michael@0	79
michael@0	80	/* Control the Silk encoder */
michael@0	81	opus_int silk_control_encoder(
michael@0	82	silk_encoder_state_Fxx *psEnc, /* I/O Pointer to Silk encoder state */
michael@0	83	silk_EncControlStruct *encControl, /* I Control structure */
michael@0	84	const opus_int32 TargetRate_bps, /* I Target max bitrate (bps) */
michael@0	85	const opus_int allow_bw_switch, /* I Flag to allow switching audio bandwidth */
michael@0	86	const opus_int channelNb, /* I Channel number */
michael@0	87	const opus_int force_fs_kHz
michael@0	88	);
michael@0	89
michael@0	90	/****************/
michael@0	91	/* Prefiltering */
michael@0	92	/****************/
michael@0	93	void silk_prefilter_FIX(
michael@0	94	silk_encoder_state_FIX *psEnc, /* I/O Encoder state */
michael@0	95	const silk_encoder_control_FIX *psEncCtrl, /* I Encoder control */
michael@0	96	opus_int32 xw_Q10[], /* O Weighted signal */
michael@0	97	const opus_int16 x[] /* I Speech signal */
michael@0	98	);
michael@0	99
michael@0	100	/**************************/
michael@0	101	/* Noise shaping analysis */
michael@0	102	/**************************/
michael@0	103	/* Compute noise shaping coefficients and initial gain values */
michael@0	104	void silk_noise_shape_analysis_FIX(
michael@0	105	silk_encoder_state_FIX *psEnc, /* I/O Encoder state FIX */
michael@0	106	silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control FIX */
michael@0	107	const opus_int16 *pitch_res, /* I LPC residual from pitch analysis */
michael@0	108	const opus_int16 *x, /* I Input signal [ frame_length + la_shape ] */
michael@0	109	int arch /* I Run-time architecture */
michael@0	110	);
michael@0	111
michael@0	112	/* Autocorrelations for a warped frequency axis */
michael@0	113	void silk_warped_autocorrelation_FIX(
michael@0	114	opus_int32 *corr, /* O Result [order + 1] */
michael@0	115	opus_int *scale, /* O Scaling of the correlation vector */
michael@0	116	const opus_int16 *input, /* I Input data to correlate */
michael@0	117	const opus_int warping_Q16, /* I Warping coefficient */
michael@0	118	const opus_int length, /* I Length of input */
michael@0	119	const opus_int order /* I Correlation order (even) */
michael@0	120	);
michael@0	121
michael@0	122	/* Calculation of LTP state scaling */
michael@0	123	void silk_LTP_scale_ctrl_FIX(
michael@0	124	silk_encoder_state_FIX *psEnc, /* I/O encoder state */
michael@0	125	silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
michael@0	126	opus_int condCoding /* I The type of conditional coding to use */
michael@0	127	);
michael@0	128
michael@0	129	/**********************************************/
michael@0	130	/* Prediction Analysis */
michael@0	131	/**********************************************/
michael@0	132	/* Find pitch lags */
michael@0	133	void silk_find_pitch_lags_FIX(
michael@0	134	silk_encoder_state_FIX *psEnc, /* I/O encoder state */
michael@0	135	silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
michael@0	136	opus_int16 res[], /* O residual */
michael@0	137	const opus_int16 x[], /* I Speech signal */
michael@0	138	int arch /* I Run-time architecture */
michael@0	139	);
michael@0	140
michael@0	141	/* Find LPC and LTP coefficients */
michael@0	142	void silk_find_pred_coefs_FIX(
michael@0	143	silk_encoder_state_FIX *psEnc, /* I/O encoder state */
michael@0	144	silk_encoder_control_FIX *psEncCtrl, /* I/O encoder control */
michael@0	145	const opus_int16 res_pitch[], /* I Residual from pitch analysis */
michael@0	146	const opus_int16 x[], /* I Speech signal */
michael@0	147	opus_int condCoding /* I The type of conditional coding to use */
michael@0	148	);
michael@0	149
michael@0	150	/* LPC analysis */
michael@0	151	void silk_find_LPC_FIX(
michael@0	152	silk_encoder_state *psEncC, /* I/O Encoder state */
michael@0	153	opus_int16 NLSF_Q15[], /* O NLSFs */
michael@0	154	const opus_int16 x[], /* I Input signal */
michael@0	155	const opus_int32 minInvGain_Q30 /* I Inverse of max prediction gain */
michael@0	156	);
michael@0	157
michael@0	158	/* LTP analysis */
michael@0	159	void silk_find_LTP_FIX(
michael@0	160	opus_int16 b_Q14[ MAX_NB_SUBFR * LTP_ORDER ], /* O LTP coefs */
michael@0	161	opus_int32 WLTP[ MAX_NB_SUBFR * LTP_ORDER * LTP_ORDER ], /* O Weight for LTP quantization */
michael@0	162	opus_int *LTPredCodGain_Q7, /* O LTP coding gain */
michael@0	163	const opus_int16 r_lpc[], /* I residual signal after LPC signal + state for first 10 ms */
michael@0	164	const opus_int lag[ MAX_NB_SUBFR ], /* I LTP lags */
michael@0	165	const opus_int32 Wght_Q15[ MAX_NB_SUBFR ], /* I weights */
michael@0	166	const opus_int subfr_length, /* I subframe length */
michael@0	167	const opus_int nb_subfr, /* I number of subframes */
michael@0	168	const opus_int mem_offset, /* I number of samples in LTP memory */
michael@0	169	opus_int corr_rshifts[ MAX_NB_SUBFR ] /* O right shifts applied to correlations */
michael@0	170	);
michael@0	171
michael@0	172	void silk_LTP_analysis_filter_FIX(
michael@0	173	opus_int16 *LTP_res, /* O LTP residual signal of length MAX_NB_SUBFR * ( pre_length + subfr_length ) */
michael@0	174	const opus_int16 *x, /* I Pointer to input signal with at least max( pitchL ) preceding samples */
michael@0	175	const opus_int16 LTPCoef_Q14[ LTP_ORDER * MAX_NB_SUBFR ],/* I LTP_ORDER LTP coefficients for each MAX_NB_SUBFR subframe */
michael@0	176	const opus_int pitchL[ MAX_NB_SUBFR ], /* I Pitch lag, one for each subframe */
michael@0	177	const opus_int32 invGains_Q16[ MAX_NB_SUBFR ], /* I Inverse quantization gains, one for each subframe */
michael@0	178	const opus_int subfr_length, /* I Length of each subframe */
michael@0	179	const opus_int nb_subfr, /* I Number of subframes */
michael@0	180	const opus_int pre_length /* I Length of the preceding samples starting at &x[0] for each subframe */
michael@0	181	);
michael@0	182
michael@0	183	/* Calculates residual energies of input subframes where all subframes have LPC_order */
michael@0	184	/* of preceding samples */
michael@0	185	void silk_residual_energy_FIX(
michael@0	186	opus_int32 nrgs[ MAX_NB_SUBFR ], /* O Residual energy per subframe */
michael@0	187	opus_int nrgsQ[ MAX_NB_SUBFR ], /* O Q value per subframe */
michael@0	188	const opus_int16 x[], /* I Input signal */
michael@0	189	opus_int16 a_Q12[ 2 ][ MAX_LPC_ORDER ], /* I AR coefs for each frame half */
michael@0	190	const opus_int32 gains[ MAX_NB_SUBFR ], /* I Quantization gains */
michael@0	191	const opus_int subfr_length, /* I Subframe length */
michael@0	192	const opus_int nb_subfr, /* I Number of subframes */
michael@0	193	const opus_int LPC_order /* I LPC order */
michael@0	194	);
michael@0	195
michael@0	196	/* Residual energy: nrg = wxx - 2 * wXx * c + c' * wXX * c */
michael@0	197	opus_int32 silk_residual_energy16_covar_FIX(
michael@0	198	const opus_int16 *c, /* I Prediction vector */
michael@0	199	const opus_int32 *wXX, /* I Correlation matrix */
michael@0	200	const opus_int32 *wXx, /* I Correlation vector */
michael@0	201	opus_int32 wxx, /* I Signal energy */
michael@0	202	opus_int D, /* I Dimension */
michael@0	203	opus_int cQ /* I Q value for c vector 0 - 15 */
michael@0	204	);
michael@0	205
michael@0	206	/* Processing of gains */
michael@0	207	void silk_process_gains_FIX(
michael@0	208	silk_encoder_state_FIX *psEnc, /* I/O Encoder state */
michael@0	209	silk_encoder_control_FIX *psEncCtrl, /* I/O Encoder control */
michael@0	210	opus_int condCoding /* I The type of conditional coding to use */
michael@0	211	);
michael@0	212
michael@0	213	/******************/
michael@0	214	/* Linear Algebra */
michael@0	215	/******************/
michael@0	216	/* Calculates correlation matrix X'*X */
michael@0	217	void silk_corrMatrix_FIX(
michael@0	218	const opus_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */
michael@0	219	const opus_int L, /* I Length of vectors */
michael@0	220	const opus_int order, /* I Max lag for correlation */
michael@0	221	const opus_int head_room, /* I Desired headroom */
michael@0	222	opus_int32 *XX, /* O Pointer to X'*X correlation matrix [ order x order ] */
michael@0	223	opus_int *rshifts /* I/O Right shifts of correlations */
michael@0	224	);
michael@0	225
michael@0	226	/* Calculates correlation vector X'*t */
michael@0	227	void silk_corrVector_FIX(
michael@0	228	const opus_int16 *x, /* I x vector [L + order - 1] used to form data matrix X */
michael@0	229	const opus_int16 *t, /* I Target vector [L] */
michael@0	230	const opus_int L, /* I Length of vectors */
michael@0	231	const opus_int order, /* I Max lag for correlation */
michael@0	232	opus_int32 *Xt, /* O Pointer to X'*t correlation vector [order] */
michael@0	233	const opus_int rshifts /* I Right shifts of correlations */
michael@0	234	);
michael@0	235
michael@0	236	/* Add noise to matrix diagonal */
michael@0	237	void silk_regularize_correlations_FIX(
michael@0	238	opus_int32 *XX, /* I/O Correlation matrices */
michael@0	239	opus_int32 *xx, /* I/O Correlation values */
michael@0	240	opus_int32 noise, /* I Noise to add */
michael@0	241	opus_int D /* I Dimension of XX */
michael@0	242	);
michael@0	243
michael@0	244	/* Solves Ax = b, assuming A is symmetric */
michael@0	245	void silk_solve_LDL_FIX(
michael@0	246	opus_int32 *A, /* I Pointer to symetric square matrix A */
michael@0	247	opus_int M, /* I Size of matrix */
michael@0	248	const opus_int32 *b, /* I Pointer to b vector */
michael@0	249	opus_int32 *x_Q16 /* O Pointer to x solution vector */
michael@0	250	);
michael@0	251
michael@0	252	#ifndef FORCE_CPP_BUILD
michael@0	253	#ifdef __cplusplus
michael@0	254	}
michael@0	255	#endif /* __cplusplus */
michael@0	256	#endif /* FORCE_CPP_BUILD */
michael@0	257	#endif /* SILK_MAIN_FIX_H */