Google Git
Sign in
android / platform / system / cros-codecs / 15fd432
commit15fd4326d2d9b7ca50b8ef4212576c6a505a6ae7[log] [tgz]
authorAlexandre Courbot <acourbot@chromium.org>Tue Mar 05 15:05:39 2024 +0900
committerAlexandre Courbot <gnurou@gmail.com>Wed Mar 13 22:20:17 2024 +0900
tree6580fcc36380b742ec29da98ad40e6028d267b9f
parentcd19c9552f4256a65cfeeed4593ff8c6b4458802 [diff]
codec/h264: move needed_for_output field to DPB entry

This field is technically a property of the DPB entry, to know whether
it can be bumped or not. Move it there to remove a few mutable accesses
to the RefCell-protected PictureData.
2 files changed
tree: 6580fcc36380b742ec29da98ad40e6028d267b9f
  1. .github/
  2. ci/
  3. examples/
  4. src/
  5. .gitignore
  6. Cargo.lock
  7. Cargo.toml
  8. CONTRIBUTING.md
  9. LICENSE
  10. README.md
README.md

Cros-codecs

A lightweight, simple, low-dependency, and hopefully safe crate for hardware-accelerated video decoding and encoding on Linux.

It is developed for use in ChromeOS (particularly crosvm), but has no dependency to ChromeOS and should be usable anywhere.

This crate is still under heavy development and is not recommended for use yet.

Current features

  • Simple decoder API,
  • VAAPI decoder support (using cros-libva) for H.264, H.265, VP8, VP9 and AV1,
  • VAAPI encoder support for H.264.

Planned features

  • Stateful V4L2 decoder support,
  • Stateless V4L2 decoder support,
  • Support for more encoder codecs,
  • V4L2 encoder support,
  • C API to be used in non-Rust projects.

Non-goals

  • Support for systems other than Linux.

Example programs

The ccdec example program can decode an encoded stream and write the decoded frames to a file. As such it can be used for testing purposes.

$ cargo build --examples
$ ./target/debug/examples/ccdec --help
Usage: ccdec <input> [--output <output>] --input-format <input-format> [--output-format <output-format>] [--synchronous] [--compute-md5 <compute-md5>]

Simple player using cros-codecs

Positional Arguments:
  input             input file

Options:
  --output          output file to write the decoded frames to
  --input-format    input format to decode from.
  --output-format   pixel format to decode into. Default: i420
  --synchronous     whether to decode frames synchronously
  --compute-md5     whether to display the MD5 of the decoded stream, and at
                    which granularity (stream or frame)
  --help            display usage information

Testing

Fluster can be used for testing, using the ccdec example program described above. This branch contains support for cros-codecs testing. Just make sure the ccdec binary is in your PATH, and run Fluster using one of the ccdec decoders, e.g.

python fluster.py run -d ccdec-H.264 -ts JVT-AVC_V1

Credits

The majority of the code in the initial commit has been written by Daniel Almeida as a VAAPI backend for crosvm, before being split into this crate.