Skip to content

Commit e97c88a

Browse files
dienhoadienhoa
committed
add license
1 parent 0da15a7 commit e97c88a

File tree

10 files changed

+266
-711
lines changed

10 files changed

+266
-711
lines changed

‎Cargo.toml‎

Lines changed: 4 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -2,6 +2,10 @@
22
name = "fast-c2pa-python"
33
version = "0.1.0"
44
edition = "2021"
5+
authors = ["Sightengine <[email protected]>"]
6+
license = "MIT OR Apache-2.0"
7+
description = "Fast Python library for reading C2PA metadata using PyO3 bindings to c2pa-rs"
8+
keywords = ["c2pa", "metadata", "python", "bindings"]
59

610
[lib]
711
name = "fast_c2pa_core"

‎LICENSE‎

Lines changed: 196 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,196 @@
1+
MIT License
2+
3+
Copyright (c) 2025 Sightengine
4+
5+
Permission is hereby granted, free of charge, to any person obtaining a copy
6+
of this software and associated documentation files (the "Software"), to deal
7+
in the Software without restriction, including without limitation the rights
8+
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9+
copies of the Software, and to permit persons to whom the Software is
10+
furnished to do so, subject to the following conditions:
11+
12+
The above copyright notice and this permission notice shall be included in all
13+
copies or substantial portions of the Software.
14+
15+
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16+
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17+
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18+
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19+
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20+
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21+
SOFTWARE.
22+
23+
================================================================================
24+
25+
This project incorporates the c2pa-rs library (https://github.com/contentauth/c2pa-rs)
26+
Copyright (c) Content Authenticity Initiative contributors
27+
which is dual-licensed under MIT and Apache 2.0 licenses.
28+
29+
Apache License
30+
Version 2.0, January 2004
31+
http://www.apache.org/licenses/
32+
33+
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
34+
35+
1. Definitions.
36+
37+
"License" shall mean the terms and conditions for use, reproduction,
38+
and distribution as defined by Sections 1 through 9 of this document.
39+
40+
"Licensor" shall mean the copyright owner or entity granting the License.
41+
42+
"Legal Entity" shall mean the union of the acting entity and all
43+
other entities that control, are controlled by, or are under common
44+
control with that entity. For the purposes of this definition,
45+
"control" means (i) the power, direct or indirect, to cause the
46+
direction or management of such entity, whether by contract or
47+
otherwise, or (ii) ownership of fifty percent (50%) or more of the
48+
outstanding shares, or (iii) beneficial ownership of such entity.
49+
50+
"You" (or "Your") shall mean an individual or Legal Entity
51+
exercising permissions granted by this License.
52+
53+
"Source" form shall mean the preferred form for making modifications,
54+
including but not limited to software source code, documentation
55+
source, and configuration files.
56+
57+
"Object" form shall mean any form resulting from mechanical
58+
transformation or translation of a Source form, including but
59+
not limited to compiled object code, generated documentation,
60+
and conversions to other media types.
61+
62+
"Work" shall mean the work of authorship, whether in Source or
63+
Object form, made available under the License, as indicated by a
64+
copyright notice that is included in or attached to the work
65+
(which may include materials held in the "License Appendix").
66+
67+
"Derivative Works" shall mean any work, whether in Source or Object
68+
form, that is based upon (or derived from) the Work and for which the
69+
editorial revisions, annotations, elaborations, or other modifications
70+
represent, as a whole, an original work of authorship. For the purposes
71+
of this License, Derivative Works shall not include works that remain
72+
separable from, or merely link (or bind by name) to the interfaces of,
73+
the Work and derivative works thereof.
74+
75+
"Contribution" shall mean any work of authorship, including
76+
the original version of the Work and any modifications or additions
77+
to that Work or Derivative Works thereof, that is intentionally
78+
submitted to Licensor for inclusion in the Work by the copyright owner
79+
or by an individual or Legal Entity authorized to submit on behalf of
80+
the copyright owner. For the purposes of this definition, "submitted"
81+
means any form of electronic, verbal, or written communication sent
82+
to the Licensor or its representatives, including but not limited to
83+
communication on electronic mailing lists, source code control
84+
systems, and issue tracking systems that are managed by, or on behalf
85+
of, the Licensor for the purpose of discussing and improving the Work,
86+
but excluding communication that is conspicuously marked or otherwise
87+
designated in writing by the copyright owner as "Not a Contribution."
88+
89+
"Contributor" shall mean Licensor and any individual or Legal Entity
90+
on behalf of whom a Contribution has been received by Licensor and
91+
subsequently incorporated within the Work.
92+
93+
2. Grant of Copyright License. Subject to the terms and conditions of
94+
this License, each Contributor hereby grants to You a perpetual,
95+
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
96+
copyright license to use, reproduce, modify, display, perform,
97+
sublicense, and distribute the Work and such Derivative Works in
98+
Source or Object form.
99+
100+
3. Grant of Patent License. Subject to the terms and conditions of
101+
this License, each Contributor hereby grants to You a perpetual,
102+
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
103+
(except as stated in this section) patent license to make, have made,
104+
use, offer to sell, sell, import, and otherwise transfer the Work,
105+
where such license applies only to those patent claims licensable
106+
by such Contributor that are necessarily infringed by their
107+
Contribution(s) alone or by combination of their Contribution(s)
108+
with the Work to which such Contribution(s) was submitted. If You
109+
institute patent litigation against any entity (including a
110+
cross-claim or counterclaim in a lawsuit) alleging that the Work
111+
or a Contribution incorporated within the Work constitutes direct
112+
or contributory patent infringement, then any patent licenses
113+
granted to You under this License for that Work shall terminate
114+
as of the date such litigation is filed.
115+
116+
4. Redistribution. You may reproduce and distribute copies of the
117+
Work or Derivative Works thereof in any medium, with or without
118+
modifications, and in Source or Object form, provided that You
119+
meet the following conditions:
120+
121+
(a) You must give any other recipients of the Work or
122+
Derivative Works a copy of this License; and
123+
124+
(b) You must cause any modified files to carry prominent notices
125+
stating that You changed the files; and
126+
127+
(c) You must retain, in the Source form of any Derivative Works
128+
that You distribute, all copyright, trademark, patent,
129+
attribution and other notices from the Source form of the Work,
130+
excluding those notices that do not pertain to any part of
131+
the Derivative Works; and
132+
133+
(d) If the Work includes a "NOTICE" file as part of its
134+
distribution, then any Derivative Works that You distribute must
135+
include a readable copy of the attribution notices contained
136+
within such NOTICE file, excluding those notices that do not
137+
pertain to any part of the Derivative Works, in at least one
138+
of the following places: within a NOTICE file distributed
139+
as part of the Derivative Works; within the Source form or
140+
documentation, if provided along with the Derivative Works; or,
141+
within a display generated by the Derivative Works, if and
142+
wherever such third-party notices normally appear. The contents
143+
of the NOTICE file are for informational purposes only and
144+
do not modify the License. You may add Your own attribution
145+
notices within Derivative Works that You distribute, alongside
146+
or as an addendum to the NOTICE text from the Work, provided
147+
that such additional attribution notices cannot be construed
148+
as modifying the License.
149+
150+
You may add Your own copyright notice regarding Your contributions.
151+
152+
5. Submission of Contributions. Unless You explicitly state otherwise,
153+
any Contribution intentionally submitted for inclusion in the Work
154+
by You to the Licensor shall be under the terms and conditions of
155+
this License, without any additional terms or conditions.
156+
Notwithstanding the above, nothing herein shall supersede or modify
157+
the terms of any separate license agreement you may have executed
158+
with Licensor regarding such Contributions.
159+
160+
6. Trademarks. This License does not grant permission to use the trade
161+
names, trademarks, service marks, or product names of the Licensor,
162+
except as required for reasonable and customary use in describing the
163+
origin of the Work and reproducing the content of the NOTICE file.
164+
165+
7. Disclaimer of Warranty. Unless required by applicable law or
166+
agreed to in writing, Licensor provides the Work (and each
167+
Contributor provides its Contributions) on an "AS IS" BASIS,
168+
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
169+
implied, including, without limitation, any warranties or conditions
170+
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
171+
PARTICULAR PURPOSE. You are solely responsible for determining the
172+
appropriateness of using or redistributing the Work and assume any
173+
risks associated with Your exercise of permissions under this License.
174+
175+
8. Limitation of Liability. In no event and under no legal theory,
176+
whether in tort (including negligence), contract, or otherwise,
177+
unless required by applicable law (such as deliberate and grossly
178+
negligent acts) or agreed to in writing, shall any Contributor be
179+
liable to You for damages, including any direct, indirect, special,
180+
incidental, or consequential damages of any character arising as a
181+
result of this License or out of the use or inability to use the
182+
Work (including but not limited to damages for loss of goodwill,
183+
work stoppage, computer failure or malfunction, or any and all
184+
other commercial damages or losses), even if such Contributor
185+
has been advised of the possibility of such damages.
186+
187+
9. Accepting Warranty or Support. You may choose to offer, and charge a
188+
fee for, warranty, support, indemnity or other liability obligations
189+
and/or rights consistent with this License. However, in accepting such
190+
obligations, You may act only on Your own behalf and on Your sole
191+
responsibility, not on behalf of any other Contributor, and only if
192+
You agree to indemnify, defend, and hold each Contributor harmless for
193+
any liability incurred by, or claims asserted against, such Contributor
194+
by reason of your accepting any such warranty or support.
195+
196+
END OF TERMS AND CONDITIONS

‎README.md‎

Lines changed: 16 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -1,18 +1,18 @@
11
# fast-c2pa-python
22

3-
A high-performance Python library for reading C2PA metadata.
3+
A Python library for reading C2PA metadata based on c2pa-rs
44

55
## Overview
66

7-
This library provides extremely fast C2PA metadata extraction from digital assets using direct PyO3 bindings to the Rust C2PA implementation. It was created to address performance bottlenecks in existing Python C2PA libraries.
7+
This library provides fast C2PA metadata extraction from digital assets using direct PyO3 bindings to the Rust C2PA implementation. It was created to address performance bottlenecks in existing Python C2PA libraries.
88

99
> **Note:** This library is designed for reading C2PA metadata only. It does not support writing or creating C2PA metadata at this time.
1010
1111
## Benchmarks
1212

1313
| Implementation | Average Read Time |
1414
| -------------- | ---------------- |
15-
| c2pa-python (UniFFI) | ~486ms |
15+
| c2pa-python (UniFFI) v8 | ~486ms |
1616
| numbers-c2pa | ~17ms |
1717
| fast-c2pa-python (PyO3) | ~8ms |
1818
| Native Rust | ~7ms |
@@ -120,4 +120,16 @@ pip install /path/to/fast_c2pa_python-x.x.x-cp3xx-cp3xx-platform.whl
120120

121121
## License
122122

123-
MIT
123+
This project is dual-licensed under both MIT and Apache 2.0 licenses to ensure compatibility with the underlying c2pa-rs library.
124+
125+
## Attribution
126+
127+
This library is built upon the excellent work of the [c2pa-rs](https://github.com/contentauth/c2pa-rs) library by the Content Authenticity Initiative. The c2pa-rs library provides the core C2PA implementation in Rust, and this project creates Python bindings using PyO3 for improved performance.
128+
129+
**Developed by:** [Sightengine](https://sightengine.com) - AI-powered content moderation
130+
131+
**Key Dependencies:**
132+
- [c2pa-rs](https://github.com/contentauth/c2pa-rs) - Core C2PA implementation
133+
- [PyO3](https://github.com/PyO3/pyo3) - Rust bindings for Python
134+
135+
Special thanks to the Content Authenticity Initiative and the c2pa-rs contributors for their foundational work on C2PA standards and implementation.

0 commit comments

Comments
 (0)