j2k-metal 0.7.1

Metal decoder and encode-stage adapter for j2k
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

// SPDX-License-Identifier: MIT OR Apache-2.0

use super::*;

#[cfg(target_os = "macos")]
#[test]
#[expect(
    clippy::cast_sign_loss,
    reason = "bounded synthetic pixels are nonnegative"
)]
fn classic_inflight_one_waits_before_submitting_the_next_chunk() {
    if !should_run_metal_runtime() {
        return;
    }

    let first = (0..8 * 8)
        .map(|index| ((index * 7 + 3) & 0xFF) as u8)
        .collect::<Vec<_>>();
    let second = (0..8 * 8)
        .map(|index| ((index * 13 + 5) & 0xFF) as u8)
        .collect::<Vec<_>>();
    let session = crate::MetalBackendSession::system_default().expect("Metal session");
    let first_buffer =
        crate::benchmark_private_buffer_with_bytes(&session, &first).expect("first private input");
    let second_buffer = crate::benchmark_private_buffer_with_bytes(&session, &second)
        .expect("second private input");
    let tiles =
        [&first_buffer, &second_buffer].map(|buffer| super::super::MetalLosslessEncodeTile {
            buffer,
            byte_offset: 0,
            width: 8,
            height: 8,
            pitch_bytes: 8,
            output_width: 8,
            output_height: 8,
            format: PixelFormat::Gray8,
        });
    let options = lossless_options! {
        backend: EncodeBackendPreference::RequireDevice,
        block_coding_mode: J2kBlockCodingMode::Classic,
        validation: J2kEncodeValidation::External,
    };

    compute::reset_resident_codestream_command_buffer_waits_for_test();
    super::super::reset_resident_schedule_counters_for_test();
    let outcome = super::super::encode_lossless_from_padded_metal_buffers_to_metal_batch(
        &tiles,
        &options,
        &session,
        super::super::MetalLosslessEncodeConfig {
            gpu_encode_inflight_tiles: Some(1),
            gpu_encode_memory_budget_bytes: Some(1024 * 1024 * 1024),
        },
    )
    .expect("classic resident batch");

    assert_eq!(outcome.outcomes.len(), 2);
    assert_eq!(
        compute::resident_codestream_command_buffer_waits_for_test(),
        2
    );
    assert_eq!(
        super::super::resident_schedule_counters_for_test(),
        (0, 1, 2)
    );
}

#[cfg(target_os = "macos")]
#[test]
#[expect(
    clippy::cast_sign_loss,
    reason = "bounded synthetic pixels are nonnegative"
)]
fn dropping_submission_does_not_schedule_remaining_resident_chunks() {
    if !should_run_metal_runtime() {
        return;
    }

    let inputs = (0..4)
        .map(|seed| {
            (0..8 * 8)
                .map(|index| ((index * 11 + seed) & 0xFF) as u8)
                .collect::<Vec<_>>()
        })
        .collect::<Vec<_>>();
    let session = crate::MetalBackendSession::system_default().expect("Metal session");
    let buffers = inputs
        .iter()
        .map(|bytes| {
            crate::benchmark_private_buffer_with_bytes(&session, bytes)
                .expect("private benchmark input buffer")
        })
        .collect::<Vec<_>>();
    let tiles = buffers
        .iter()
        .map(|buffer| super::super::MetalLosslessEncodeTile {
            buffer,
            byte_offset: 0,
            width: 8,
            height: 8,
            pitch_bytes: 8,
            output_width: 8,
            output_height: 8,
            format: PixelFormat::Gray8,
        })
        .collect::<Vec<_>>();
    let options = lossless_options! {
        backend: EncodeBackendPreference::RequireDevice,
        block_coding_mode: J2kBlockCodingMode::HighThroughput,
        validation: J2kEncodeValidation::External,
    };

    super::super::reset_resident_schedule_counters_for_test();
    let submitted = crate::submit_lossless_batch_to_metal(
        super::super::MetalLosslessEncodeBatchRequest {
            tiles: &tiles,
            staging: super::super::MetalEncodeInputStaging::AlreadyPaddedContiguous,
            config: super::super::MetalLosslessEncodeConfig {
                gpu_encode_inflight_tiles: Some(1),
                gpu_encode_memory_budget_bytes: Some(1024 * 1024 * 1024),
            },
        },
        &options,
        &session,
    )
    .expect("resident submission");
    assert_eq!(
        super::super::resident_schedule_counters_for_test(),
        (1, 1, 1),
        "submit must schedule exactly one active chunk"
    );

    drop(submitted);

    assert_eq!(
        super::super::resident_schedule_counters_for_test(),
        (0, 1, 1),
        "drop must release scheduler ownership without scheduling a suspended chunk"
    );
}