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 @**************************************************************************** 151 152 153 154
