warbler 0.0.1

procedural bird chirp synthesizer using sdl3
Documentation 
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

use warbler::{ChirpParams, Synthesizer};

fn print_usage() {
    eprintln!("usage: warbler [preset]");
    eprintln!();
    eprintln!("presets:");
    eprintln!("  sparrow    - sharp, quick chirp (2.5-5kHz, 150ms)");
    eprintln!("  robin      - melodic warble with vibrato (2-3.5kHz, 300ms)");
    eprintln!("  warbler    - complex trill (3-6kHz, 180ms)");
    eprintln!("  finch      - high-pitched tweet (3.5-7kHz, 120ms)");
    eprintln!("  default    - basic chirp");
    eprintln!();
    eprintln!("or use flags for custom chirp:");
    eprintln!("  --start-freq <hz>      starting frequency");
    eprintln!("  --end-freq <hz>        ending frequency");
    eprintln!("  --duration <ms>        duration in milliseconds");
    eprintln!("  --volume <0.0-1.0>     volume");
}

fn parse_custom_params(args: &[String]) -> Result<ChirpParams, String> {
    let mut params = ChirpParams::new();
    let mut i = 1;

    while i < args.len() {
        match args[i].as_str() {
            "--start-freq" => {
                i += 1;
                if i >= args.len() {
                    return Err("--start-freq requires value".to_string());
                }
                params.start_freq_hz = args[i]
                    .parse()
                    .map_err(|_| "invalid start-freq".to_string())?;
            }
            "--end-freq" => {
                i += 1;
                if i >= args.len() {
                    return Err("--end-freq requires value".to_string());
                }
                params.end_freq_hz = args[i]
                    .parse()
                    .map_err(|_| "invalid end-freq".to_string())?;
            }
            "--duration" => {
                i += 1;
                if i >= args.len() {
                    return Err("--duration requires value".to_string());
                }
                params.duration_ms = args[i]
                    .parse()
                    .map_err(|_| "invalid duration".to_string())?;
            }
            "--volume" => {
                i += 1;
                if i >= args.len() {
                    return Err("--volume requires value".to_string());
                }
                let vol: f32 = args[i]
                    .parse()
                    .map_err(|_| "invalid volume".to_string())?;
                params.volume = vol.clamp(0.0, 1.0);
            }
            arg => return Err(format!("unknown flag: {}", arg)),
        }
        i += 1;
    }

    Ok(params)
}

fn main() {
    let args: Vec<String> = std::env::args().collect();

    if args.len() < 2 {
        eprintln!("playing default chirp...");
        let synth = Synthesizer::new().unwrap_or_else(|e| {
            eprintln!("failed to initialize audio: {}", e);
            std::process::exit(1);
        });

        if let Err(e) = synth.play_chirp(ChirpParams::new()) {
            eprintln!("error playing chirp: {}", e);
            std::process::exit(1);
        }
        return;
    }

    let preset = &args[1];

    if preset == "--help" || preset == "-h" {
        print_usage();
        return;
    }

    let params = if preset.starts_with("--") {
        match parse_custom_params(&args) {
            Ok(p) => {
                eprintln!(
                    "playing custom chirp: {:.0}Hz -> {:.0}Hz over {}ms",
                    p.start_freq_hz, p.end_freq_hz, p.duration_ms
                );
                p
            }
            Err(e) => {
                eprintln!("error: {}", e);
                print_usage();
                std::process::exit(1);
            }
        }
    } else {
        let p = match preset.as_str() {
            "sparrow" => {
                eprintln!("chirping like a sparrow...");
                warbler::sparrow()
            }
            "robin" => {
                eprintln!("warbling like a robin...");
                warbler::robin()
            }
            "warbler" => {
                eprintln!("trilling like a warbler...");
                warbler::warbler()
            }
            "finch" => {
                eprintln!("tweeting like a finch...");
                warbler::finch()
            }
            "default" => {
                eprintln!("playing default chirp...");
                ChirpParams::new()
            }
            _ => {
                eprintln!("unknown preset: {}", preset);
                print_usage();
                std::process::exit(1);
            }
        };
        p
    };

    let synth = Synthesizer::new().unwrap_or_else(|e| {
        eprintln!("failed to initialize audio: {}", e);
        std::process::exit(1);
    });

    if let Err(e) = synth.play_chirp(params) {
        eprintln!("error playing chirp: {}", e);
        std::process::exit(1);
    }
}