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Diffstat (limited to 'src/libspeex/vorbis_psy.h')
-rw-r--r-- | src/libspeex/vorbis_psy.h | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/src/libspeex/vorbis_psy.h b/src/libspeex/vorbis_psy.h deleted file mode 100644 index 68710577..00000000 --- a/src/libspeex/vorbis_psy.h +++ /dev/null @@ -1,97 +0,0 @@ -/* Copyright (C) 2005 Jean-Marc Valin, CSIRO, Christopher Montgomery - File: vorbis_psy.h - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions - are met: - - - Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - - - Redistributions in binary form must reproduce the above copyright - notice, this list of conditions and the following disclaimer in the - documentation and/or other materials provided with the distribution. - - - Neither the name of the Xiph.org Foundation nor the names of its - contributors may be used to endorse or promote products derived from - this software without specific prior written permission. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -*/ - -#ifndef VORBIS_PSY_H -#define VORBIS_PSY_H - -#ifdef VORBIS_PSYCHO - -#include "smallft.h" -#define P_BANDS 17 /* 62Hz to 16kHz */ -#define NOISE_COMPAND_LEVELS 40 - - -#define todB(x) ((x)>1e-13?log((x)*(x))*4.34294480f:-30) -#define fromdB(x) (exp((x)*.11512925f)) - -/* The bark scale equations are approximations, since the original - table was somewhat hand rolled. The below are chosen to have the - best possible fit to the rolled tables, thus their somewhat odd - appearance (these are more accurate and over a longer range than - the oft-quoted bark equations found in the texts I have). The - approximations are valid from 0 - 30kHz (nyquist) or so. - - all f in Hz, z in Bark */ - -#define toBARK(n) (13.1f*atan(.00074f*(n))+2.24f*atan((n)*(n)*1.85e-8f)+1e-4f*(n)) -#define fromBARK(z) (102.f*(z)-2.f*pow(z,2.f)+.4f*pow(z,3.f)+pow(1.46f,z)-1.f) - -/* Frequency to octave. We arbitrarily declare 63.5 Hz to be octave - 0.0 */ - -#define toOC(n) (log(n)*1.442695f-5.965784f) -#define fromOC(o) (exp(((o)+5.965784f)*.693147f)) - - -typedef struct { - - float noisewindowlo; - float noisewindowhi; - int noisewindowlomin; - int noisewindowhimin; - int noisewindowfixed; - float noiseoff[P_BANDS]; - float noisecompand[NOISE_COMPAND_LEVELS]; - -} VorbisPsyInfo; - - - -typedef struct { - int n; - int rate; - struct drft_lookup lookup; - VorbisPsyInfo *vi; - - float *window; - float *noiseoffset; - long *bark; - -} VorbisPsy; - - -VorbisPsy *vorbis_psy_init(int rate, int size); -void vorbis_psy_destroy(VorbisPsy *psy); -void compute_curve(VorbisPsy *psy, float *audio, float *curve); -void curve_to_lpc(VorbisPsy *psy, float *curve, float *awk1, float *awk2, int ord); - -#endif -#endif |