summaryrefslogtreecommitdiffstats
path: root/arm-hybrid-22k/lib_src/eas_reverbdata.h
diff options
context:
space:
mode:
Diffstat (limited to 'arm-hybrid-22k/lib_src/eas_reverbdata.h')
-rw-r--r--arm-hybrid-22k/lib_src/eas_reverbdata.h486
1 files changed, 0 insertions, 486 deletions
diff --git a/arm-hybrid-22k/lib_src/eas_reverbdata.h b/arm-hybrid-22k/lib_src/eas_reverbdata.h
deleted file mode 100644
index ef424da..0000000
--- a/arm-hybrid-22k/lib_src/eas_reverbdata.h
+++ /dev/null
@@ -1,486 +0,0 @@
-/*----------------------------------------------------------------------------
- *
- * File:
- * eas_reverbdata.h
- *
- * Contents and purpose:
- * Contains the prototypes for the Reverb effect.
- *
- *
- * Copyright Sonic Network Inc. 2006
-
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- *
- *----------------------------------------------------------------------------
- * Revision Control:
- * $Revision: 499 $
- * $Date: 2006-12-11 16:07:20 -0800 (Mon, 11 Dec 2006) $
- *----------------------------------------------------------------------------
-*/
-
-#ifndef _EAS_REVERBDATA_H
-#define _EAS_REVERBDATA_H
-
-#include "eas_types.h"
-#include "eas_audioconst.h"
-
-/*------------------------------------
- * defines
- *------------------------------------
-*/
-
-/*
-CIRCULAR() calculates the array index using modulo arithmetic.
-The "trick" is that modulo arithmetic is simplified by masking
-the effective address where the mask is (2^n)-1. This only works
-if the buffer size is a power of two.
-*/
-#define CIRCULAR(base,offset,size) (EAS_U32)( \
- ( \
- ((EAS_I32)(base)) + ((EAS_I32)(offset)) \
- ) \
- & size \
- )
-
-/* reverb parameters are updated every 2^(REVERB_UPDATE_PERIOD_IN_BITS) samples */
-#if defined (_SAMPLE_RATE_8000)
-
-#define REVERB_UPDATE_PERIOD_IN_BITS 5
-#define REVERB_BUFFER_SIZE_IN_SAMPLES 2048
-
-#elif defined (_SAMPLE_RATE_16000)
-
-#define REVERB_UPDATE_PERIOD_IN_BITS 6
-#define REVERB_BUFFER_SIZE_IN_SAMPLES 4096
-
-#elif defined (_SAMPLE_RATE_22050)
-
-#define REVERB_UPDATE_PERIOD_IN_BITS 7
-#define REVERB_BUFFER_SIZE_IN_SAMPLES 4096
-
-#elif defined (_SAMPLE_RATE_32000)
-
-#define REVERB_UPDATE_PERIOD_IN_BITS 7
-#define REVERB_BUFFER_SIZE_IN_SAMPLES 8192
-
-#elif defined (_SAMPLE_RATE_44100)
-
-#define REVERB_UPDATE_PERIOD_IN_BITS 8
-#define REVERB_BUFFER_SIZE_IN_SAMPLES 8192
-
-#elif defined (_SAMPLE_RATE_48000)
-
-#define REVERB_UPDATE_PERIOD_IN_BITS 8
-#define REVERB_BUFFER_SIZE_IN_SAMPLES 8192
-
-#endif
-
-// Define a mask for circular addressing, so that array index
-// can wraparound and stay in array boundary of 0, 1, ..., (buffer size -1)
-// The buffer size MUST be a power of two
-#define REVERB_BUFFER_MASK (REVERB_BUFFER_SIZE_IN_SAMPLES -1)
-
-#define REVERB_MAX_ROOM_TYPE 4 // any room numbers larger than this are invalid
-#define REVERB_MAX_NUM_REFLECTIONS 5 // max num reflections per channel
-
-/* synth parameters are updated every SYNTH_UPDATE_PERIOD_IN_SAMPLES */
-#define REVERB_UPDATE_PERIOD_IN_SAMPLES (EAS_I32)(0x1L << REVERB_UPDATE_PERIOD_IN_BITS)
-
-/*
-calculate the update counter by bitwise ANDING with this value to
-generate a 2^n modulo value
-*/
-#define REVERB_MODULO_UPDATE_PERIOD_IN_SAMPLES (EAS_I32)(REVERB_UPDATE_PERIOD_IN_SAMPLES -1)
-
-/* synth parameters are updated every SYNTH_UPDATE_PERIOD_IN_SECONDS seconds */
-#define REVERB_UPDATE_PERIOD_IN_SECONDS (REVERB_UPDATE_PERIOD_IN_SAMPLES / _OUTPUT_SAMPLE_RATE)
-
-// xfade parameters
-#define REVERB_XFADE_PERIOD_IN_SECONDS (100.0 / 1000.0) // xfade once every this many seconds
-
-#define REVERB_XFADE_PERIOD_IN_SAMPLES (REVERB_XFADE_PERIOD_IN_SECONDS * _OUTPUT_SAMPLE_RATE)
-
-#define REVERB_XFADE_PHASE_INCREMENT (EAS_I16)(65536 / ((EAS_I16)REVERB_XFADE_PERIOD_IN_SAMPLES/(EAS_I16)REVERB_UPDATE_PERIOD_IN_SAMPLES))
-
-/**********/
-/* the entire synth uses various flags in a bit field */
-
-/* if flag is set, synth reset has been requested */
-#define REVERB_FLAG_RESET_IS_REQUESTED 0x01 /* bit 0 */
-#define MASK_REVERB_RESET_IS_REQUESTED 0x01
-#define MASK_REVERB_RESET_IS_NOT_REQUESTED (EAS_U32)(~MASK_REVERB_RESET_IS_REQUESTED)
-
-/*
-by default, we always want to update ALL channel parameters
-when we reset the synth (e.g., during GM ON)
-*/
-#define DEFAULT_REVERB_FLAGS 0x0
-
-/* coefficients for generating sin, cos */
-#define REVERB_PAN_G2 4294940151 /* -0.82842712474619 = 2 - 4/sqrt(2) */
-/*
-EAS_I32 nPanG1 = +1.0 for sin
-EAS_I32 nPanG1 = -1.0 for cos
-*/
-#define REVERB_PAN_G0 23170 /* 0.707106781186547 = 1/sqrt(2) */
-
-/*************************************************************/
-// define the input injection points
-#define GUARD 5 // safety guard of this many samples
-
-#define MAX_AP_TIME (double) (20.0/1000.0) // delay time in milliseconds
-#define MAX_DELAY_TIME (double) (65.0/1000.0) // delay time in milliseconds
-
-#define MAX_AP_SAMPLES (int)(((double) MAX_AP_TIME) * ((double) _OUTPUT_SAMPLE_RATE))
-#define MAX_DELAY_SAMPLES (int)(((double) MAX_DELAY_TIME) * ((double) _OUTPUT_SAMPLE_RATE))
-
-#define AP0_IN 0
-#define AP1_IN (AP0_IN + MAX_AP_SAMPLES + GUARD)
-#define DELAY0_IN (AP1_IN + MAX_AP_SAMPLES + GUARD)
-#define DELAY1_IN (DELAY0_IN + MAX_DELAY_SAMPLES + GUARD)
-
-// Define the max offsets for the end points of each section
-// i.e., we don't expect a given section's taps to go beyond
-// the following limits
-#define AP0_OUT (AP0_IN + MAX_AP_SAMPLES -1)
-#define AP1_OUT (AP1_IN + MAX_AP_SAMPLES -1)
-#define DELAY0_OUT (DELAY0_IN + MAX_DELAY_SAMPLES -1)
-#define DELAY1_OUT (DELAY1_IN + MAX_DELAY_SAMPLES -1)
-
-#define REVERB_DEFAULT_ROOM_NUMBER 1 // default preset number
-#define DEFAULT_AP0_LENGTH (int)(((double) (17.0/1000.0)) * ((double) _OUTPUT_SAMPLE_RATE))
-#define DEFAULT_AP0_GAIN 19400
-#define DEFAULT_AP1_LENGTH (int)(((double) (16.5/1000.0)) * ((double) _OUTPUT_SAMPLE_RATE))
-#define DEFAULT_AP1_GAIN -19400
-
-#define REVERB_DEFAULT_WET 32767
-#define REVERB_DEFAULT_DRY 0
-
-#define EAS_REVERB_WET_MAX 32767
-#define EAS_REVERB_WET_MIN 0
-#define EAS_REVERB_DRY_MAX 32767
-#define EAS_REVERB_DRY_MIN 0
-
-/* parameters for each allpass */
-typedef struct
-{
- EAS_U16 m_zApOut; // delay offset for ap out
-
- EAS_I16 m_nApGain; // gain for ap
-
- EAS_U16 m_zApIn; // delay offset for ap in
-
-} S_ALLPASS_OBJECT;
-
-
-/* parameters for each allpass */
-typedef struct
-{
- EAS_PCM m_zLpf; // actual state variable, not a length
-
- EAS_I16 m_nLpfFwd; // lpf forward gain
-
- EAS_I16 m_nLpfFbk; // lpf feedback gain
-
- EAS_U16 m_zDelay[REVERB_MAX_NUM_REFLECTIONS]; // delay offset for ap out
-
- EAS_I16 m_nGain[REVERB_MAX_NUM_REFLECTIONS]; // gain for ap
-
-} S_EARLY_REFLECTION_OBJECT;
-
-//demo
-typedef struct
-{
- EAS_I16 m_nLpfFbk;
- EAS_I16 m_nLpfFwd;
-
- EAS_I16 m_nEarly;
- EAS_I16 m_nWet;
- EAS_I16 m_nDry;
-
- EAS_I16 m_nEarlyL_LpfFbk;
- EAS_I16 m_nEarlyL_LpfFwd;
-
- EAS_I16 m_nEarlyL_Delay0; //8
- EAS_I16 m_nEarlyL_Gain0;
- EAS_I16 m_nEarlyL_Delay1;
- EAS_I16 m_nEarlyL_Gain1;
- EAS_I16 m_nEarlyL_Delay2;
- EAS_I16 m_nEarlyL_Gain2;
- EAS_I16 m_nEarlyL_Delay3;
- EAS_I16 m_nEarlyL_Gain3;
- EAS_I16 m_nEarlyL_Delay4;
- EAS_I16 m_nEarlyL_Gain4;
-
- EAS_I16 m_nEarlyR_Delay0; //18
- EAS_I16 m_nEarlyR_Gain0;
- EAS_I16 m_nEarlyR_Delay1;
- EAS_I16 m_nEarlyR_Gain1;
- EAS_I16 m_nEarlyR_Delay2;
- EAS_I16 m_nEarlyR_Gain2;
- EAS_I16 m_nEarlyR_Delay3;
- EAS_I16 m_nEarlyR_Gain3;
- EAS_I16 m_nEarlyR_Delay4;
- EAS_I16 m_nEarlyR_Gain4;
-
- EAS_U16 m_nMaxExcursion; //28
- EAS_I16 m_nXfadeInterval;
-
- EAS_I16 m_nAp0_ApGain; //30
- EAS_I16 m_nAp0_ApOut;
- EAS_I16 m_nAp1_ApGain;
- EAS_I16 m_nAp1_ApOut;
-
- EAS_I16 m_rfu4;
- EAS_I16 m_rfu5;
- EAS_I16 m_rfu6;
- EAS_I16 m_rfu7;
- EAS_I16 m_rfu8;
- EAS_I16 m_rfu9;
- EAS_I16 m_rfu10; //43
-
-} S_REVERB_PRESET;
-
-typedef struct
-{
- S_REVERB_PRESET m_sPreset[REVERB_MAX_ROOM_TYPE]; //array of presets
-
-} S_REVERB_PRESET_BANK;
-
-/* parameters for each reverb */
-typedef struct
-{
- /* controls entire reverb playback volume */
- /* to conserve memory, use the MSB and ignore the LSB */
- EAS_U8 m_nMasterVolume;
-
- /* update counter keeps track of when synth params need updating */
- /* only needs to be as large as REVERB_UPDATE_PERIOD_IN_SAMPLES */
- EAS_I16 m_nUpdateCounter;
-
- EAS_U16 m_nMinSamplesToAdd; /* ComputeReverb() generates this many samples */
-
- EAS_U8 m_nFlags; /* misc flags/bit fields */
-
- EAS_PCM *m_pOutputBuffer;
- EAS_PCM *m_pInputBuffer;
-
- EAS_U16 m_nNumSamplesInOutputBuffer;
- EAS_U16 m_nNumSamplesInInputBuffer;
-
- EAS_U16 m_nNumInputSamplesRead; // if m_nNumInputSamplesRead >= NumSamplesInInputBuffer
- // then get a new input buffer
- EAS_PCM *m_pNextInputSample;
-
- EAS_U16 m_nBaseIndex; // base index for circular buffer
-
- // reverb delay line offsets, allpass parameters, etc:
-
- EAS_PCM m_nRevOutFbkR; // combine feedback reverb right out with dry left in
-
- S_ALLPASS_OBJECT m_sAp0; // allpass 0 (left channel)
-
- EAS_U16 m_zD0In; // delay offset for delay line D0 in
-
- EAS_PCM m_nRevOutFbkL; // combine feedback reverb left out with dry right in
-
- S_ALLPASS_OBJECT m_sAp1; // allpass 1 (right channel)
-
- EAS_U16 m_zD1In; // delay offset for delay line D1 in
-
- // delay output taps, notice criss cross order
- EAS_U16 m_zD0Self; // self feeds forward d0 --> d0
-
- EAS_U16 m_zD1Cross; // cross feeds across d1 --> d0
-
- EAS_PCM m_zLpf0; // actual state variable, not a length
-
- EAS_U16 m_zD1Self; // self feeds forward d1 --> d1
-
- EAS_U16 m_zD0Cross; // cross feeds across d0 --> d1
-
- EAS_PCM m_zLpf1; // actual state variable, not a length
-
- EAS_I16 m_nSin; // gain for self taps
-
- EAS_I16 m_nCos; // gain for cross taps
-
- EAS_I16 m_nSinIncrement; // increment for gain
-
- EAS_I16 m_nCosIncrement; // increment for gain
-
- EAS_I16 m_nLpfFwd; // lpf forward gain (includes scaling for mixer)
-
- EAS_I16 m_nLpfFbk; // lpf feedback gain
-
- EAS_U16 m_nXfadeInterval; // update/xfade after this many samples
-
- EAS_U16 m_nXfadeCounter; // keep track of when to xfade
-
- EAS_I16 m_nPhase; // -1 <= m_nPhase < 1
- // but during sin,cos calculations
- // use m_nPhase/2
-
- EAS_I16 m_nPhaseIncrement; // add this to m_nPhase each frame
-
- EAS_I16 m_nNoise; // random noise sample
-
- EAS_U16 m_nMaxExcursion; // the taps can excurse +/- this amount
-
- EAS_BOOL m_bUseNoise; // if EAS_TRUE, use noise as input signal
-
- EAS_BOOL m_bBypass; // if EAS_TRUE, then bypass reverb and copy input to output
-
- EAS_I16 m_nCurrentRoom; // preset number for current room
-
- EAS_I16 m_nNextRoom; // preset number for next room
-
- EAS_I16 m_nWet; // gain for wet (processed) signal
-
- EAS_I16 m_nDry; // gain for dry (unprocessed) signal
-
- EAS_I16 m_nEarly; // gain for early (widen) signal
-
- S_EARLY_REFLECTION_OBJECT m_sEarlyL; // left channel early reflections
- S_EARLY_REFLECTION_OBJECT m_sEarlyR; // right channel early reflections
-
- EAS_PCM m_nDelayLine[REVERB_BUFFER_SIZE_IN_SAMPLES]; // one large delay line for all reverb elements
-
- S_REVERB_PRESET pPreset;
-
- S_REVERB_PRESET_BANK m_sPreset;
-
- //EAS_I8 preset;
-
-} S_REVERB_OBJECT;
-
-
-/*------------------------------------
- * prototypes
- *------------------------------------
-*/
-
-/*----------------------------------------------------------------------------
- * ReverbUpdateXfade
- *----------------------------------------------------------------------------
- * Purpose:
- * Update the xfade parameters as required
- *
- * Inputs:
- * nNumSamplesToAdd - number of samples to write to buffer
- *
- * Outputs:
- *
- *
- * Side Effects:
- * - xfade parameters will be changed
- *
- *----------------------------------------------------------------------------
-*/
-static EAS_RESULT ReverbUpdateXfade(S_REVERB_OBJECT* pReverbData, EAS_INT nNumSamplesToAdd);
-
-/*----------------------------------------------------------------------------
- * ReverbCalculateNoise
- *----------------------------------------------------------------------------
- * Purpose:
- * Calculate a noise sample and limit its value
- *
- * Inputs:
- * nMaxExcursion - noise value is limited to this value
- * pnNoise - return new noise sample in this (not limited)
- *
- * Outputs:
- * new limited noise value
- *
- * Side Effects:
- * - *pnNoise noise value is updated
- *
- *----------------------------------------------------------------------------
-*/
-static EAS_U16 ReverbCalculateNoise(EAS_U16 nMaxExcursion, EAS_I16 *pnNoise);
-
-/*----------------------------------------------------------------------------
- * ReverbCalculateSinCos
- *----------------------------------------------------------------------------
- * Purpose:
- * Calculate a new sin and cosine value based on the given phase
- *
- * Inputs:
- * nPhase - phase angle
- * pnSin - input old value, output new value
- * pnCos - input old value, output new value
- *
- * Outputs:
- *
- * Side Effects:
- * - *pnSin, *pnCos are updated
- *
- *----------------------------------------------------------------------------
-*/
-static EAS_RESULT ReverbCalculateSinCos(EAS_I16 nPhase, EAS_I16 *pnSin, EAS_I16 *pnCos);
-
-/*----------------------------------------------------------------------------
- * Reverb
- *----------------------------------------------------------------------------
- * Purpose:
- * apply reverb to the given signal
- *
- * Inputs:
- * nNu
- * pnSin - input old value, output new value
- * pnCos - input old value, output new value
- *
- * Outputs:
- * number of samples actually reverberated
- *
- * Side Effects:
- *
- *----------------------------------------------------------------------------
-*/
-static EAS_RESULT Reverb(S_REVERB_OBJECT* pReverbData, EAS_INT nNumSamplesToAdd, EAS_PCM *pOutputBuffer, EAS_PCM *pInputBuffer);
-
-/*----------------------------------------------------------------------------
- * ReverbReadInPresets()
- *----------------------------------------------------------------------------
- * Purpose: sets global reverb preset bank to defaults
- *
- * Inputs:
- *
- * Outputs:
- *
- *----------------------------------------------------------------------------
-*/
-static EAS_RESULT ReverbReadInPresets(S_REVERB_OBJECT* pReverbData);
-
-
-/*----------------------------------------------------------------------------
- * ReverbUpdateRoom
- *----------------------------------------------------------------------------
- * Purpose:
- * Update the room's preset parameters as required
- *
- * Inputs:
- *
- * Outputs:
- *
- *
- * Side Effects:
- * - reverb paramters (fbk, fwd, etc) will be changed
- * - m_nCurrentRoom := m_nNextRoom
- *----------------------------------------------------------------------------
-*/
-static EAS_RESULT ReverbUpdateRoom(S_REVERB_OBJECT* pReverbData);
-
-#endif /* #ifndef _EAS_REVERBDATA_H */
-
-
generated by cgit v1.1 at 2024-12-22 15:17:14 +0000