995dcb610c
Took the opportunity to undo the Godot changed made to the
opus source. The opus module should eventually be built in its
own environment to avoid polluting others with too many include
dirs and defines.
TODO: Fix the platform/ stuff for opus.
(cherry picked from commit d9a291f641)
speex module was only added while cherry-picking, as speex is removed
in the master branch but we don't want to break compatibility in 2.1.x.
Unbundling wasn't done as the module uses the internal speex_free,
so it would require some more work.
70 lines
2.3 KiB
C++
70 lines
2.3 KiB
C++
/* Copyright (C) 2002 Jean-Marc Valin */
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/**
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@file vbr.h
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@brief Variable Bit-Rate (VBR) related routines
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*/
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef VBR_H
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#define VBR_H
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#include "arch.h"
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#define VBR_MEMORY_SIZE 5
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extern const float vbr_nb_thresh[9][11];
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extern const float vbr_hb_thresh[5][11];
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extern const float vbr_uhb_thresh[2][11];
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/** VBR state. */
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typedef struct VBRState {
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float energy_alpha;
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float average_energy;
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float last_energy;
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float last_log_energy[VBR_MEMORY_SIZE];
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float accum_sum;
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float last_pitch_coef;
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float soft_pitch;
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float last_quality;
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float noise_level;
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float noise_accum;
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float noise_accum_count;
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int consec_noise;
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} VBRState;
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void vbr_init(VBRState *vbr);
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float vbr_analysis(VBRState *vbr, spx_word16_t *sig, int len, int pitch, float pitch_coef);
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void vbr_destroy(VBRState *vbr);
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#endif
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