Dave Sparks | 56c99cd | 2009-08-24 17:35:45 -0700 | [diff] [blame] | 1 | @*********************************************************** |
| 2 | @ File: ARM_synth_constants.inc |
| 3 | @ Processor: ARM |
| 4 | @ Description: Contains constants and defines, most of which |
| 5 | @ are mirrored in synth.h |
| 6 | @ |
| 7 | @ Copyright Sonic Network Inc. 2004 |
| 8 | @**************************************************************** |
| 9 | @ Revision Control: |
| 10 | @ $Revision: 741 $ |
| 11 | @ $Date: 2007-06-22 16:39:21 -0700 (Fri, 22 Jun 2007) $ |
| 12 | @**************************************************************** |
| 13 | |
| 14 | |
| 15 | .ifdef SAMPLE_RATE_8000 |
| 16 | .equ SYNTH_UPDATE_PERIOD_IN_BITS, 5 |
| 17 | .equ BUFFER_SIZE_IN_MONO_SAMPLES, 32 |
| 18 | .endif |
| 19 | |
| 20 | .ifdef SAMPLE_RATE_16000 |
| 21 | .equ SYNTH_UPDATE_PERIOD_IN_BITS, 6 |
| 22 | .equ BUFFER_SIZE_IN_MONO_SAMPLES, 64 |
| 23 | .endif |
| 24 | |
| 25 | .ifdef SAMPLE_RATE_20000 |
| 26 | .equ SYNTH_UPDATE_PERIOD_IN_BITS, 7 |
| 27 | .equ BUFFER_SIZE_IN_MONO_SAMPLES, 128 |
| 28 | .endif |
| 29 | |
| 30 | .ifdef SAMPLE_RATE_22050 |
| 31 | .equ SYNTH_UPDATE_PERIOD_IN_BITS, 7 |
| 32 | .equ BUFFER_SIZE_IN_MONO_SAMPLES, 128 |
| 33 | .endif |
| 34 | |
| 35 | .ifdef SAMPLE_RATE_24000 |
| 36 | .equ SYNTH_UPDATE_PERIOD_IN_BITS, 7 |
| 37 | .equ BUFFER_SIZE_IN_MONO_SAMPLES, 128 |
| 38 | .endif |
| 39 | |
| 40 | .ifdef SAMPLE_RATE_32000 |
| 41 | .equ SYNTH_UPDATE_PERIOD_IN_BITS, 7 |
| 42 | .equ BUFFER_SIZE_IN_MONO_SAMPLES, 128 |
| 43 | .endif |
| 44 | |
| 45 | .ifdef SAMPLE_RATE_44100 |
| 46 | .equ SYNTH_UPDATE_PERIOD_IN_BITS, 8 |
| 47 | .equ BUFFER_SIZE_IN_MONO_SAMPLES, 256 |
| 48 | .endif |
| 49 | |
| 50 | .ifdef SAMPLE_RATE_48000 |
| 51 | .equ SYNTH_UPDATE_PERIOD_IN_BITS, 8 |
| 52 | .equ BUFFER_SIZE_IN_MONO_SAMPLES, 256 |
| 53 | .endif |
| 54 | |
| 55 | |
| 56 | @ if the OUTPUT PCM sample is 16-bits, then when using indexed addressing, |
| 57 | @ the next sample is this many bytes away |
| 58 | .equ NEXT_OUTPUT_PCM, 2 |
| 59 | |
| 60 | @**************************************************************************** |
| 61 | @/* macros for fractional phase accumulator */ |
| 62 | .equ NUM_PHASE_FRAC_BITS, 15 |
| 63 | |
| 64 | .equ PHASE_FRAC_MASK, 0x7FFF |
| 65 | |
| 66 | @ shift for phase accumulator when fraction carries over |
| 67 | .ifdef SAMPLES_8_BIT |
| 68 | .equ NEXT_INPUT_PCM_SHIFT, 0 |
| 69 | .endif |
| 70 | |
| 71 | .ifdef SAMPLES_16_BIT |
| 72 | .equ NEXT_INPUT_PCM_SHIFT, 1 |
| 73 | .endif |
| 74 | |
| 75 | @**************************************************************************** |
| 76 | .equ NUM_MIXER_GUARD_BITS, 4 |
| 77 | |
| 78 | @**************************************************************************** |
| 79 | @/* Envelope 1 (EG1) calculation macros */ |
| 80 | .equ NUM_EG1_FRAC_BITS, 15 |
| 81 | |
| 82 | @**************************************************************************** |
| 83 | |
| 84 | .equ NUM_ENHANCER_FILTER_COEF_FRAC_BITS, 5 |
| 85 | |
| 86 | @**************************************************************************** |
| 87 | |
| 88 | @ |
| 89 | @ I've temporarily given up on the idea of getting ADS/RV and gcc to |
| 90 | @ handle a struct in a compatible fashion. Switching to old fashion EQU |
| 91 | @ |
| 92 | |
| 93 | .if FILTER_ENABLED |
| 94 | @************************************** |
| 95 | @ typedef struct s_filter_tag |
| 96 | .equ m_z1, 0 |
| 97 | .equ m_z2, 2 |
| 98 | .endif |
| 99 | |
| 100 | @************************************** |
| 101 | @ typedef struct s_wt_frame_tag |
| 102 | .equ m_gainTarget, 0 |
| 103 | .equ m_phaseIncrement, 4 |
| 104 | |
| 105 | .if FILTER_ENABLED |
| 106 | .equ m_k, 8 |
| 107 | .equ m_b1, 12 |
| 108 | .equ m_b2, 16 |
| 109 | .equ m_pAudioBuffer, 20 |
| 110 | .equ m_pMixBuffer, 24 |
| 111 | .equ m_numSamples, 28 |
| 112 | .equ m_prevGain, 32 |
| 113 | .else |
| 114 | .equ m_pAudioBuffer, 8 |
| 115 | .equ m_pMixBuffer, 12 |
| 116 | .equ m_numSamples, 16 |
| 117 | .equ m_prevGain, 20 |
| 118 | .endif |
| 119 | |
| 120 | |
| 121 | @************************************** |
| 122 | @ typedef struct s_wt_voice_tag |
| 123 | .equ m_pLoopEnd, 0 @ /* points to last PCM sample (not 1 beyond last) */ |
| 124 | .equ m_pLoopStart, 4 @ /* points to first sample at start of loop */ |
| 125 | .equ m_pPhaseAccum, 8 @ /* points to first sample at start of loop */ |
| 126 | .equ m_phaseFrac, 12 @ /* points to first sample at start of loop */ |
| 127 | |
| 128 | .if STEREO_OUTPUT |
| 129 | .equ m_gainLeft, 16 @ /* current gain, left ch */ |
| 130 | .equ m_gainRight, 18 @ /* current gain, right ch */ |
| 131 | .endif |
| 132 | |
| 133 | |
| 134 | @**************************************************************************** |
| 135 | @ enhancer |
| 136 | .equ m_nEnhancerFeedForward1, 0 |
| 137 | .equ m_nEnhancerFeedback1, 1 |
| 138 | .equ m_nDriveCoef, 2 |
| 139 | .equ m_nEnhancerFeedback2, 3 |
| 140 | .equ m_nWet, 4 |
| 141 | .equ m_nDry, 5 |
| 142 | |
| 143 | .equ m_zF0L, 6 @ filter 1 zero state var, left |
| 144 | .equ m_zF1L, 8 @ filter 1 pole state var, left |
| 145 | .equ m_zF2L, 10 @ filter 2 zero state var, left |
| 146 | .equ m_zF0R, 12 @ filter 1 zero state var, right |
| 147 | .equ m_zF1R, 14 @ filter 1 pole state var, right |
| 148 | .equ m_zF2R, 16 @ filter 2 zero state var, right |
| 149 | |
| 150 | @**************************************************************************** |
| 151 | |
| 152 | |
| 153 | |