zenavif 0.1.6

Pure Rust AVIF image codec powered by rav1d and zenravif
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
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169

//! Benchmark SIMD vs scalar libyuv

use archmage::prelude::*;
use std::time::Instant;
use zenavif::yuv_convert::{YuvMatrix, YuvRange};
use zenavif::yuv_convert_libyuv;
use zenavif::yuv_convert_libyuv_simd;

fn main() {
    let Some(token) = Desktop64::summon() else {
        println!("AVX2 not available");
        return;
    };

    let width = 1920;
    let height = 1080;

    // Create test data
    let mut y_plane = vec![0u8; width * height];
    let mut u_plane = vec![0u8; (width / 2) * (height / 2)];
    let mut v_plane = vec![0u8; (width / 2) * (height / 2)];

    for (i, val) in y_plane.iter_mut().enumerate() {
        *val = ((i * 17) % 256) as u8;
    }
    for (i, val) in u_plane.iter_mut().enumerate() {
        *val = ((i * 37 + 64) % 256) as u8;
    }
    for (i, val) in v_plane.iter_mut().enumerate() {
        *val = ((i * 53 + 128) % 256) as u8;
    }

    println!("Benchmarking {}x{} YUV420 to RGB8", width, height);
    println!();

    // Warm up
    let _ = yuv_convert_libyuv::yuv420_to_rgb8(
        &y_plane,
        width,
        &u_plane,
        width / 2,
        &v_plane,
        width / 2,
        width,
        height,
        YuvRange::Full,
        YuvMatrix::Bt709,
    )
    .unwrap();
    let _ = yuv_convert_libyuv_simd::yuv420_to_rgb8_simd(
        token,
        &y_plane,
        width,
        &u_plane,
        width / 2,
        &v_plane,
        width / 2,
        width,
        height,
        YuvRange::Full,
        YuvMatrix::Bt709,
    )
    .unwrap();

    // Benchmark scalar
    let iterations = 100;
    let start = Instant::now();
    for _ in 0..iterations {
        let _ = yuv_convert_libyuv::yuv420_to_rgb8(
            &y_plane,
            width,
            &u_plane,
            width / 2,
            &v_plane,
            width / 2,
            width,
            height,
            YuvRange::Full,
            YuvMatrix::Bt709,
        )
        .unwrap();
    }
    let scalar_time = start.elapsed();
    let scalar_ms = scalar_time.as_secs_f64() * 1000.0 / iterations as f64;

    // Benchmark SIMD
    let start = Instant::now();
    for _ in 0..iterations {
        let _ = yuv_convert_libyuv_simd::yuv420_to_rgb8_simd(
            token,
            &y_plane,
            width,
            &u_plane,
            width / 2,
            &v_plane,
            width / 2,
            width,
            height,
            YuvRange::Full,
            YuvMatrix::Bt709,
        )
        .unwrap();
    }
    let simd_time = start.elapsed();
    let simd_ms = simd_time.as_secs_f64() * 1000.0 / iterations as f64;

    println!(
        "Scalar:  {:.3} ms  ({:.1} Mpixels/s)",
        scalar_ms,
        (width * height) as f64 / scalar_ms / 1000.0
    );
    println!(
        "SIMD:    {:.3} ms  ({:.1} Mpixels/s)",
        simd_ms,
        (width * height) as f64 / simd_ms / 1000.0
    );
    println!();
    println!("Speedup: {:.2}x", scalar_ms / simd_ms);

    // Verify accuracy
    let scalar_result = yuv_convert_libyuv::yuv420_to_rgb8(
        &y_plane,
        width,
        &u_plane,
        width / 2,
        &v_plane,
        width / 2,
        width,
        height,
        YuvRange::Full,
        YuvMatrix::Bt709,
    )
    .unwrap();
    let simd_result = yuv_convert_libyuv_simd::yuv420_to_rgb8_simd(
        token,
        &y_plane,
        width,
        &u_plane,
        width / 2,
        &v_plane,
        width / 2,
        width,
        height,
        YuvRange::Full,
        YuvMatrix::Bt709,
    )
    .unwrap();

    let mut mismatches = 0;
    for i in 0..(width * height) {
        let s = scalar_result.buf()[i];
        let v = simd_result.buf()[i];
        if s.r != v.r || s.g != v.g || s.b != v.b {
            mismatches += 1;
            if mismatches <= 5 {
                println!(
                    "Mismatch at pixel {}: scalar=({},{},{}), simd=({},{},{})",
                    i, s.r, s.g, s.b, v.r, v.g, v.b
                );
            }
        }
    }

    if mismatches > 0 {
        println!("\n❌ {} pixels differ!", mismatches);
    } else {
        println!("\n✅ SIMD matches scalar perfectly!");
    }
}