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1 | // Copyright 2022 The ChromiumOS Authors | |
2 | // Use of this source code is governed by a BSD-style license that can be | |
3 | // found in the LICENSE file. | |
4 | ||
5 | use std::ops::{BitAnd, BitAndAssign, BitOr, BitOrAssign, BitXor, BitXorAssign}; | |
6 | ||
7 | use crate::constants; | |
8 | ||
9 | /// Usage hint flags structure. | |
10 | #[derive(Default, Clone, Copy, Debug, PartialEq)] | |
11 | pub struct UsageHints(u32); | |
12 | ||
13 | impl UsageHints { | |
14 | /// Returns usage hint flags value as 32-bit integer. | |
15 | pub fn bits(self) -> u32 { | |
16 | self.0 | |
17 | } | |
18 | } | |
19 | ||
20 | impl BitOr<UsageHint> for UsageHints { | |
21 | type Output = Self; | |
22 | ||
23 | fn bitor(self, rhs: UsageHint) -> Self { | |
24 | Self(self.0 | rhs.bits()) | |
25 | } | |
26 | } | |
27 | ||
28 | impl BitOrAssign<UsageHint> for UsageHints { | |
29 | fn bitor_assign(&mut self, rhs: UsageHint) { | |
30 | self.0 |= rhs.bits(); | |
31 | } | |
32 | } | |
33 | ||
34 | impl BitXor<UsageHint> for UsageHints { | |
35 | type Output = Self; | |
36 | ||
37 | fn bitxor(self, rhs: UsageHint) -> Self { | |
38 | Self(self.0 ^ rhs.bits()) | |
39 | } | |
40 | } | |
41 | ||
42 | impl BitXorAssign<UsageHint> for UsageHints { | |
43 | fn bitxor_assign(&mut self, rhs: UsageHint) { | |
44 | self.0 ^= rhs.bits(); | |
45 | } | |
46 | } | |
47 | ||
48 | impl BitAnd<UsageHint> for UsageHints { | |
49 | type Output = Self; | |
50 | ||
51 | fn bitand(self, rhs: UsageHint) -> Self { | |
52 | Self(self.0 & rhs.bits()) | |
53 | } | |
54 | } | |
55 | ||
56 | impl BitAndAssign<UsageHint> for UsageHints { | |
57 | fn bitand_assign(&mut self, rhs: UsageHint) { | |
58 | self.0 &= rhs.bits(); | |
59 | } | |
60 | } | |
61 | ||
62 | /// Gives the driver a hint of intended usage to optimize allocation (e.g. tiling). | |
63 | #[repr(u32)] | |
64 | #[derive(Clone, Copy, Debug, PartialEq)] | |
65 | pub enum UsageHint { | |
66 | /// Surface usage not indicated. | |
67 | Generic = constants::VA_SURFACE_ATTRIB_USAGE_HINT_GENERIC, | |
68 | /// Surface used by video decoder. | |
69 | Decoder = constants::VA_SURFACE_ATTRIB_USAGE_HINT_DECODER, | |
70 | /// Surface used by video encoder. | |
71 | Encoder = constants::VA_SURFACE_ATTRIB_USAGE_HINT_ENCODER, | |
72 | /// Surface read by video post-processing. | |
73 | VppRead = constants::VA_SURFACE_ATTRIB_USAGE_HINT_VPP_READ, | |
74 | /// Surface written by video post-processing. | |
75 | VppWrite = constants::VA_SURFACE_ATTRIB_USAGE_HINT_VPP_WRITE, | |
76 | /// Surface used for display. | |
77 | Display = constants::VA_SURFACE_ATTRIB_USAGE_HINT_DISPLAY, | |
78 | /// Surface used for export to third-party APIs, e.g. via `vaExportSurfaceHandle()`. | |
79 | Export = constants::VA_SURFACE_ATTRIB_USAGE_HINT_EXPORT, | |
80 | } | |
81 | ||
82 | impl From<UsageHint> for UsageHints { | |
83 | fn from(val: UsageHint) -> Self { | |
84 | Self(val.bits()) | |
85 | } | |
86 | } | |
87 | ||
88 | impl From<UsageHint> for u32 { | |
89 | fn from(val: UsageHint) -> u32 { | |
90 | val.bits() | |
91 | } | |
92 | } | |
93 | ||
94 | impl UsageHint { | |
95 | pub(crate) fn bits(self) -> u32 { | |
96 | self as u32 | |
97 | } | |
98 | } |