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Dennis Kempin 1dab58a2cf Update all copyright headers to match new style 
This search/replace updates all copyright notices to drop the
"All rights reserved", Use "ChromiumOS" instead of "Chromium OS"
and drops the trailing dots.

This fulfills the request from legal and unifies our notices.

./tools/health-check has been updated to only accept this style.

BUG=b:246579983
TEST=./tools/health-check

Change-Id: I87a80701dc651f1baf4820e5cc42469d7c5f5bf7
Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3894243
Reviewed-by: Daniel Verkamp <dverkamp@chromium.org>
Commit-Queue: Dennis Kempin <denniskempin@google.com>
2022-09-13 18:41:29 +00:00
..
src Update all copyright headers to match new style 2022-09-13 18:41:29 +00:00
bindgen.sh Update all copyright headers to match new style 2022-09-13 18:41:29 +00:00
build.rs Update all copyright headers to match new style 2022-09-13 18:41:29 +00:00
Cargo.toml virtio: video: decoder: add ffmpeg-based software decoder backend 2022-06-07 11:44:21 +00:00
README.md media: ffmpeg: upgrade to ffmpeg 5.0 libraries 2022-08-23 01:47:48 +00:00
VERSIONS media: ffmpeg: upgrade to ffmpeg 5.0 libraries 2022-08-23 01:47:48 +00:00

README.md

FFmpeg wrapper

This is a minimal FFmpeg 5.0 wrapper for use with the virtio-video device, allowing to run a virtual video device backed by software decoding or encoding. This is useful for development and testing in situations where no supported video acceleration is available on the host.

Although several FFmpeg binding crates exist, most of them are not able to link against the system FFmpeg, and the only one that does is released under a software license that makes our lawyers nervous. Also they all run bindgen at build time, which is not possible to do under the Chrome OS build system and would require to patch the crate with fully generated bindings.

So taking this in consideration, as well as the extra work that it is to depend on external Rust crates in Chrome OS, it is preferable to add our own simple bindings here that cover just the parts of FFmpeg that we need.

This crate has minimal dependencies ; on the FFmpeg side, it just uses libavcodec, libavutil and libswscale.

The bindings can be updated using the bindgen.sh script. A few elements that bindgen cannot generate because they are behind C macros are re-defined in avutil.rs and error.rs, as well as tests to ensure their correctness.

And that's about it.