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66 lines
2.2 KiB
66 lines
2.2 KiB
/* Copyright (C) 2002 Jean-Marc Valin |
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File: vbr.h |
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VBR-related routines |
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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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#define VBR_MEMORY_SIZE 5 |
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extern float vbr_nb_thresh[9][11]; |
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extern float vbr_hb_thresh[5][11]; |
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extern float vbr_uhb_thresh[2][11]; |
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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, float *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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