103 lines
3.7 KiB
C
103 lines
3.7 KiB
C
/* Copyright (c) 2011 Xiph.Org Foundation
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Written by Jean-Marc Valin */
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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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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 ANALYSIS_H
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#define ANALYSIS_H
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#include "opus/celt/celt.h"
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#include "opus/opus_private.h"
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#define NB_FRAMES 8
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#define NB_TBANDS 18
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#define NB_TOT_BANDS 21
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#define ANALYSIS_BUF_SIZE 720 /* 15 ms at 48 kHz */
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#define DETECT_SIZE 200
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typedef struct {
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int arch;
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#define TONALITY_ANALYSIS_RESET_START angle
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float angle[240];
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float d_angle[240];
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float d2_angle[240];
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opus_val32 inmem[ANALYSIS_BUF_SIZE];
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int mem_fill; /* number of usable samples in the buffer */
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float prev_band_tonality[NB_TBANDS];
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float prev_tonality;
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float E[NB_FRAMES][NB_TBANDS];
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float lowE[NB_TBANDS];
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float highE[NB_TBANDS];
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float meanE[NB_TOT_BANDS];
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float mem[32];
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float cmean[8];
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float std[9];
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float music_prob;
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float Etracker;
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float lowECount;
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int E_count;
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int last_music;
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int last_transition;
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int count;
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float subframe_mem[3];
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int analysis_offset;
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/** Probability of having speech for time i to DETECT_SIZE-1 (and music before).
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pspeech[0] is the probability that all frames in the window are speech. */
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float pspeech[DETECT_SIZE];
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/** Probability of having music for time i to DETECT_SIZE-1 (and speech before).
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pmusic[0] is the probability that all frames in the window are music. */
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float pmusic[DETECT_SIZE];
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float speech_confidence;
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float music_confidence;
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int speech_confidence_count;
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int music_confidence_count;
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int write_pos;
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int read_pos;
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int read_subframe;
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AnalysisInfo info[DETECT_SIZE];
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} TonalityAnalysisState;
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/** Initialize a TonalityAnalysisState struct.
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*
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* This performs some possibly slow initialization steps which should
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* not be repeated every analysis step. No allocated memory is retained
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* by the state struct, so no cleanup call is required.
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*/
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void tonality_analysis_init(TonalityAnalysisState *analysis);
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/** Reset a TonalityAnalysisState stuct.
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*
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* Call this when there's a discontinuity in the data.
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*/
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void tonality_analysis_reset(TonalityAnalysisState *analysis);
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void tonality_get_info(TonalityAnalysisState *tonal, AnalysisInfo *info_out, int len);
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void run_analysis(TonalityAnalysisState *analysis, const CELTMode *celt_mode, const void *analysis_pcm,
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int analysis_frame_size, int frame_size, int c1, int c2, int C, opus_int32 Fs,
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int lsb_depth, downmix_func downmix, AnalysisInfo *analysis_info);
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#endif
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