1 files changed, 0 insertions, 114 deletions
diff --git a/src/main/kotlin/space/autistic/radio/fmsim/FmFullConstants.kt b/src/main/kotlin/space/autistic/radio/fmsim/FmFullConstants.kt
deleted file mode 100644
index 6b92328..0000000
--- a/src/main/kotlin/space/autistic/radio/fmsim/FmFullConstants.kt
+++ /dev/null
@@ -1,114 +0,0 @@
-package space.autistic.radio.fmsim
-
-import kotlin.math.PI
-import kotlin.math.cos
-import kotlin.math.sin
-
-object FmFullConstants {
-    // tau = 75us, fh = 20396.25Hz
-    const val FM_PREEMPAHSIS_B0_48K = 6.7639647f
-    const val FM_PREEMPHASIS_B1_48K = -4.975628f
-
-    /* const val FM_PREEMPHASIS_A0_48K = 1f */
-    const val FM_PREEMPHASIS_A1_48K = 0.78833646f
-
-    const val FM_DEEMPAHSIS_B0_48K = 1f / FM_PREEMPAHSIS_B0_48K
-    const val FM_DEEMPHASIS_B1_48K = FM_PREEMPHASIS_A1_48K / FM_PREEMPAHSIS_B0_48K
-
-    /* const val FM_DEEMPHASIS_A0_48K = 1f */
-    const val FM_DEEMPHASIS_A1_48K = FM_PREEMPHASIS_B1_48K / FM_PREEMPAHSIS_B0_48K
-
-    val FIR_LPF_48K_15K_3K1 = floatArrayOf(
-        -0.0010006913216784596f,
-        0.001505308784544468f,
-        -2.625857350794219e-18f,
-        -0.002777613466605544f,
-        0.0030173989944159985f,
-        0.002290070755407214f,
-        -0.008225799538195133f,
-        0.004239063244313002f,
-        0.010359899140894413f,
-        -0.017650796100497246f,
-        1.510757873119297e-17f,
-        0.029305754229426384f,
-        -0.02889496460556984f,
-        -0.020366130396723747f,
-        0.07103750854730606f,
-        -0.03811456635594368f,
-        -0.10945471376180649f,
-        0.29212409257888794f,
-        0.6252123713493347f,
-        0.29212409257888794f,
-        -0.10945471376180649f,
-        -0.03811456635594368f,
-        0.07103750854730606f,
-        -0.020366130396723747f,
-        -0.02889496460556984f,
-        0.029305754229426384f,
-        1.510757873119297e-17f,
-        -0.017650796100497246f,
-        0.010359899140894413f,
-        0.004239063244313002f,
-        -0.008225799538195133f,
-        0.002290070755407214f,
-        0.0030173989944159985f,
-        -0.002777613466605544f,
-        -2.625857350794219e-18f,
-        0.001505308784544468f,
-        -0.0010006913216784596f,
-    )
-
-    // chosen such that we can easily do 38kHz mixing in frequency (1500*38k/300k = shift of 95 bins, where 1500 comes
-    // from the 4/25 ratio 48k/300k i.e. 240*25/4)
-    // (the theoretical optimum, as per above, would be around 180)
-    // (we could have fudged the carrier frequency a bit but we chose not to)
-    // NOTE: latency = (data block size / 48000) seconds (84 -> 1.75 ms)
-    const val FFT_SIZE_LPF_48K_15K_3K1 = 2 * 120
-    const val FFT_OVERLAP_LPF_48K_15K_3K1 = 36
-    const val FFT_DATA_BLOCK_SIZE_LPF_48K_15K_3K1 = FFT_SIZE_LPF_48K_15K_3K1 - FFT_OVERLAP_LPF_48K_15K_3K1
-
-    init {
-        assert(FFT_OVERLAP_LPF_48K_15K_3K1 >= FIR_LPF_48K_15K_3K1.size - 1)
-    }
-
-    const val DECIMATION_48K_300K = 4
-    const val INTERPOLATION_48K_300K = 25
-
-    const val FFT_SIZE_48K_300K = FFT_SIZE_LPF_48K_15K_3K1 * INTERPOLATION_48K_300K / DECIMATION_48K_300K
-    const val FFT_OVERLAP_48K_300K = FFT_OVERLAP_LPF_48K_15K_3K1 * INTERPOLATION_48K_300K / DECIMATION_48K_300K
-    const val FFT_DATA_BLOCK_SIZE_48K_300K = FFT_SIZE_48K_300K - FFT_OVERLAP_48K_300K
-
-    // how many bins to shift for 38kHz mixing
-    // assuming FFT_SIZE_LPF_48K_15K_3K1 *bins* (complex)
-    // 19 / 150 is the ratio between 38k/300k
-    const val FREQUENCY_MIXING_BINS_38K =
-        FFT_SIZE_LPF_48K_15K_3K1 * INTERPOLATION_48K_300K / DECIMATION_48K_300K * 19 / 150
-
-    // a single cycle of a 19kHz signal takes (1/19k)/(1/300k) or 300k/19k samples.
-    // since that number isn't exact, buffer an entire 19 cycles.
-    const val BUFFER_SIZE_19K_300K = 300
-
-    // using cosine is nicer
-    val BUFFER_19K_300K = FloatArray(BUFFER_SIZE_19K_300K) {
-        0.1f * cos(2 * PI * 19000.0 * it.toDouble() / 300000.0).toFloat()
-    }
-
-    // we want a carrier deviation of +-75kHz, at a sampling rate of 300kHz
-    const val CORRECTION_FACTOR = (75000.0 / (300000.0 / (2.0 * PI))).toFloat()
-    const val INVERSE_CORRECTION_FACTOR = 1 / CORRECTION_FACTOR
-
-    // these are used for "low/high" mixing
-    const val CBUFFER_SIZE_100K_300K = 3
-
-    val CBUFFER_100K_300K = FloatArray(2 * CBUFFER_SIZE_100K_300K) {
-        val index = it / 2
-        if (it and 1 == 0) {
-            1f * sin(2 * PI * 100000.0 * index.toDouble() / 300000.0).toFloat()
-        } else {
-            1f * cos(2 * PI * 100000.0 * index.toDouble() / 300000.0).toFloat()
-        }
-    }
-
-    const val STEREO = true
-    const val MONO = false
-}
\ No newline at end of file