Initial community commit

Src/external_dependencies/openmpt-trunk/include/opus/src/analysis.h

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+/* Copyright (c) 2011 Xiph.Org Foundation
+   Written by Jean-Marc Valin */
+/*
+   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.
+
+   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 ANALYSIS_H
+#define ANALYSIS_H
+
+#include "celt.h"
+#include "opus_private.h"
+#include "mlp.h"
+
+#define NB_FRAMES 8
+#define NB_TBANDS 18
+#define ANALYSIS_BUF_SIZE 720 /* 30 ms at 24 kHz */
+
+/* At that point we can stop counting frames because it no longer matters. */
+#define ANALYSIS_COUNT_MAX 10000
+
+#define DETECT_SIZE 100
+
+/* Uncomment this to print the MLP features on stdout. */
+/*#define MLP_TRAINING*/
+
+typedef struct {
+   int arch;
+   int application;
+   opus_int32 Fs;
+#define TONALITY_ANALYSIS_RESET_START angle
+   float angle[240];
+   float d_angle[240];
+   float d2_angle[240];
+   opus_val32 inmem[ANALYSIS_BUF_SIZE];
+   int   mem_fill;                      /* number of usable samples in the buffer */
+   float prev_band_tonality[NB_TBANDS];
+   float prev_tonality;
+   int prev_bandwidth;
+   float E[NB_FRAMES][NB_TBANDS];
+   float logE[NB_FRAMES][NB_TBANDS];
+   float lowE[NB_TBANDS];
+   float highE[NB_TBANDS];
+   float meanE[NB_TBANDS+1];
+   float mem[32];
+   float cmean[8];
+   float std[9];
+   float Etracker;
+   float lowECount;
+   int E_count;
+   int count;
+   int analysis_offset;
+   int write_pos;
+   int read_pos;
+   int read_subframe;
+   float hp_ener_accum;
+   int initialized;
+   float rnn_state[MAX_NEURONS];
+   opus_val32 downmix_state[3];
+   AnalysisInfo info[DETECT_SIZE];
+} TonalityAnalysisState;
+
+/** Initialize a TonalityAnalysisState struct.
+ *
+ * This performs some possibly slow initialization steps which should
+ * not be repeated every analysis step. No allocated memory is retained
+ * by the state struct, so no cleanup call is required.
+ */
+void tonality_analysis_init(TonalityAnalysisState *analysis, opus_int32 Fs);
+
+/** Reset a TonalityAnalysisState stuct.
+ *
+ * Call this when there's a discontinuity in the data.
+ */
+void tonality_analysis_reset(TonalityAnalysisState *analysis);
+
+void tonality_get_info(TonalityAnalysisState *tonal, AnalysisInfo *info_out, int len);
+
+void run_analysis(TonalityAnalysisState *analysis, const CELTMode *celt_mode, const void *analysis_pcm,
+                 int analysis_frame_size, int frame_size, int c1, int c2, int C, opus_int32 Fs,
+                 int lsb_depth, downmix_func downmix, AnalysisInfo *analysis_info);
+
+#endif