1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163

use crate::base::*;
use crate::frames::{Frames, FramesMut};
use miniaudio_sys as sys;

#[repr(transparent)]
#[derive(Clone)]
pub struct BiquadConfig(sys::ma_biquad_config);

impl BiquadConfig {
    #[inline]
    pub fn new(
        format: Format,
        channels: u32,
        numerators: [f64; 3],
        denominators: [f64; 3],
    ) -> BiquadConfig {
        unsafe {
            BiquadConfig(sys::ma_biquad_config_init(
                format as _,
                channels,
                numerators[0],
                numerators[1],
                numerators[2],
                denominators[0],
                denominators[1],
                denominators[2],
            ))
        }
    }

    #[inline]
    pub fn format(&self) -> Format {
        Format::from_c(self.0.format)
    }

    #[inline]
    pub fn set_format(&mut self, format: Format) {
        self.0.format = format as _;
    }

    #[inline]
    pub fn channels(&self) -> u32 {
        self.0.channels
    }

    #[inline]
    pub fn set_channels(&mut self, channels: u32) {
        self.0.channels = channels;
    }

    /// Get a Biquad Coefficient numerator.
    #[inline]
    pub fn b(&self, index: usize) -> f64 {
        match index {
            0 => self.0.b0,
            1 => self.0.b1,
            2 => self.0.b2,
            _ => panic!("Numerator out of range."),
        }
    }

    /// Set a Biquad Coefficient numerator.
    #[inline]
    pub fn set_b(&mut self, index: usize, value: f64) {
        match index {
            0 => self.0.b0 = value,
            1 => self.0.b1 = value,
            2 => self.0.b2 = value,
            _ => panic!("Numerator out of range."),
        }
    }

    /// Get a Biquad Coefficient denominator.
    #[inline]
    pub fn a(&self, index: usize) -> f64 {
        match index {
            0 => self.0.a0,
            1 => self.0.a1,
            2 => self.0.a2,
            _ => panic!("Denominator out of range."),
        }
    }

    /// Set a Biquad Coefficient denominator.
    #[inline]
    pub fn set_a(&mut self, index: usize, value: f64) {
        match index {
            0 => self.0.a0 = value,
            1 => self.0.a1 = value,
            2 => self.0.a2 = value,
            _ => panic!("Denominator out of range."),
        }
    }
}

#[repr(transparent)]
#[derive(Clone)]
pub struct Biquad(sys::ma_biquad);

impl Biquad {
    #[inline]
    pub fn new(config: &BiquadConfig) -> Result<Biquad, Error> {
        let mut biquad = std::mem::MaybeUninit::uninit();
        unsafe {
            let result = sys::ma_biquad_init(&config.0, biquad.as_mut_ptr());
            map_result!(result, Biquad(biquad.assume_init()))
        }
    }

    #[inline]
    pub fn reinit(&mut self, config: &BiquadConfig) -> Result<(), Error> {
        let result = unsafe { sys::ma_biquad_reinit(&config.0, &mut self.0) };
        Error::from_c_result(result)
    }

    #[inline]
    pub fn process_pcm_frames(
        &mut self,
        output: &mut FramesMut,
        input: &Frames,
    ) -> Result<(), Error> {
        if output.format() != input.format() {
            ma_debug_panic!(
                "output and input format did not match (output: {:?}, input: {:?}",
                output.format(),
                input.format()
            );
            return Err(Error::InvalidArgs);
        }

        if output.frame_count() != input.frame_count() {
            ma_debug_panic!("output and input buffers did not have the same frame count (output: {}, input: {})", output.frame_count(), input.frame_count());
            return Err(Error::InvalidArgs);
        }

        let result = unsafe {
            sys::ma_biquad_process_pcm_frames(
                &mut self.0,
                output.as_mut_ptr() as *mut _,
                input.as_ptr() as *const _,
                output.frame_count() as u64,
            )
        };
        Error::from_c_result(result)
    }

    #[inline]
    pub fn format(&self) -> Format {
        Format::from_c(self.0.format)
    }

    #[inline]
    pub fn channels(&self) -> u32 {
        self.0.channels
    }

    // FIXME the pointer is not marked as const in the C source even though it could be. I should
    // probably try to get that fixed.
    #[inline]
    pub fn latency(&mut self) -> u32 {
        unsafe { sys::ma_biquad_get_latency(&mut self.0) }
    }
}