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android / platform / system / cros-codecs / bb6c72d
commitbb6c72de7daef68bf28554843b1f87182e529fd5[log] [tgz]
authorHirokazu Honda <hiroh@google.com>Thu Sep 04 18:22:57 2025 -0700
committerHirokazu Honda <hiroh@google.com>Thu Sep 11 11:58:55 2025 -0700
tree5e8becafd825ab64db284a32ce2d8c88d1cfdfc6
parentae2cd789d6efb23166b1ad8323d438203eeda9eb [diff]
Support H264 encrypted stream processing

This adds the code to `StatelessDecoderH264` for encrypted stream
processing.
- Specify encrypted ranges for NALU parser.
- Compute the subsamples for the current NALU.

This change doesn't support CENCv1.

Bug: 435219833, 441153357
Test: VtsHalMediaC2V1_0TargetVideoDecTest
Test: CtsMediaDecoderTestCases, CtsMediaV2TestCases, and CtsVideoCodecTestCases
Flag: EXEMPT desktop only
Change-Id: Ia87d7a76bf366d41764a604234f4a5a553e55221
3 files changed
tree: 5e8becafd825ab64db284a32ce2d8c88d1cfdfc6
  1. .cargo/
  2. ci/
  3. examples/
  4. fuzz/
  5. src/
  6. tests/
  7. .clippy.toml
  8. .gitignore
  9. Android.bp
  10. Cargo.toml
  11. cargo_embargo.json
  12. CONTRIBUTING.md
  13. DIR_METADATA
  14. LICENSE
  15. METADATA
  16. MODULE_LICENSE_BSD
  17. OWNERS
  18. README.md
  19. rustfmt.toml
  20. simple_test.py
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.

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, VP9 and AV1,
  • Stateful V4L2 encoder support.

Planned features

  • Stateful V4L2 decoder support,
  • Stateless V4L2 decoder support,
  • Support for more encoder codecs,
  • 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>] [--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
  --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.