j2k-metal 0.7.5

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
141
142
143
144
145
146
147

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

use core::mem::size_of;

use super::*;

fn descriptor(packet_index: u32, state_index: u32) -> j2k_native::J2kPacketizationPacketDescriptor {
    j2k_native::J2kPacketizationPacketDescriptor {
        packet_index,
        state_index,
        layer: 0,
        resolution: packet_index,
        component: 0,
        precinct: 0,
    }
}

#[test]
fn tier2_metadata_plan_honors_exact_aggregate_cap() {
    let payload = [0x2a];
    let resolutions = [j2k_native::J2kPacketizationResolution {
        subbands: vec![j2k_native::J2kPacketizationSubband {
            code_blocks: vec![j2k_native::J2kPacketizationCodeBlock {
                data: &payload,
                ht_cleanup_length: 0,
                ht_refinement_length: 0,
                num_coding_passes: 1,
                num_zero_bitplanes: 0,
                previously_included: false,
                l_block: 3,
                block_coding_mode: J2kPacketizationBlockCodingMode::Classic,
            }],
            num_cbs_x: 1,
            num_cbs_y: 1,
        }],
    }];
    let packet_descriptors = [descriptor(0, 7), descriptor(0, 7)];
    let job = J2kPacketizationEncodeJob {
        resolution_count: 1,
        num_layers: 2,
        num_components: 1,
        code_block_count: 1,
        progression_order: j2k_native::J2kPacketizationProgressionOrder::Lrcp,
        packet_descriptors: &packet_descriptors,
        resolutions: &resolutions,
    };
    let counts = tier2_packet_allocation_counts(job).expect("metadata counts");
    assert_eq!(counts.unique_states, 1);
    assert_eq!(counts.state_blocks, 1);
    let exact_cap = size_of::<J2kPacketResolution>()
        + size_of::<J2kPacketSubband>()
        + size_of::<J2kPacketBlock>()
        + size_of::<u8>()
        + size_of::<(u32, u32, usize)>()
        + size_of::<J2kPacketStateBlock>()
        + 2 * size_of::<J2kPacketDescriptor>();
    let requests = tier2_packet_allocation_requests(&counts);
    crate::batch_allocation::BatchMetadataBudget::with_cap(
        "J2K Metal Tier-2 packet metadata",
        exact_cap,
    )
    .preflight(&requests)
    .expect("exact aggregate cap");
    assert!(matches!(
        crate::batch_allocation::BatchMetadataBudget::with_cap(
            "J2K Metal Tier-2 packet metadata",
            exact_cap - 1,
        )
        .preflight(&requests),
        Err(j2k_core::BatchInfrastructureError::AllocationTooLarge {
            requested,
            cap,
            ..
        }) if requested == exact_cap && cap == exact_cap - 1
    ));
}

#[test]
fn plan_rejects_descriptor_packet_index_before_metal_dispatch() {
    let resolutions = [j2k_native::J2kPacketizationResolution {
        subbands: Vec::new(),
    }];
    let packet_descriptors = [descriptor(1, 0)];
    let job = J2kPacketizationEncodeJob {
        resolution_count: 1,
        num_layers: 1,
        num_components: 1,
        code_block_count: 0,
        progression_order: j2k_native::J2kPacketizationProgressionOrder::Lrcp,
        packet_descriptors: &packet_descriptors,
        resolutions: &resolutions,
    };

    let Err(error) = plan_tier2_packetization(job) else {
        panic!("out-of-range descriptor unexpectedly planned");
    };
    assert!(matches!(
        error,
        Error::MetalKernel { ref message }
            if message == "Tier-2 Metal packet descriptor packet index out of range"
    ));
}

#[test]
fn plan_rejects_reused_state_with_a_different_block_layout() {
    let payload = [0x2a];
    let resolutions = [
        j2k_native::J2kPacketizationResolution {
            subbands: Vec::new(),
        },
        j2k_native::J2kPacketizationResolution {
            subbands: vec![j2k_native::J2kPacketizationSubband {
                code_blocks: vec![j2k_native::J2kPacketizationCodeBlock {
                    data: &payload,
                    ht_cleanup_length: 0,
                    ht_refinement_length: 0,
                    num_coding_passes: 1,
                    num_zero_bitplanes: 0,
                    previously_included: false,
                    l_block: 3,
                    block_coding_mode: J2kPacketizationBlockCodingMode::Classic,
                }],
                num_cbs_x: 1,
                num_cbs_y: 1,
            }],
        },
    ];
    let packet_descriptors = [descriptor(0, 7), descriptor(1, 7)];
    let job = J2kPacketizationEncodeJob {
        resolution_count: 2,
        num_layers: 1,
        num_components: 1,
        code_block_count: 1,
        progression_order: j2k_native::J2kPacketizationProgressionOrder::Lrcp,
        packet_descriptors: &packet_descriptors,
        resolutions: &resolutions,
    };

    let Err(error) = plan_tier2_packetization(job) else {
        panic!("mismatched reused state unexpectedly planned");
    };
    assert!(matches!(
        error,
        Error::MetalKernel { ref message }
            if message == "Tier-2 Metal packet descriptor state layout mismatch"
    ));
}