Add AV1 support v2

[hgaiser]

Continuation of #1

Thanks to @porkloin

This currently produces the following through the verify_all example:

Testing H264 Eight Yuv420...
  PASS: PSNR = 61.57 dB
------------------------------------------------
Testing H264 Eight Yuv444...
  PASS: PSNR = 58.82 dB
------------------------------------------------
Testing H264 Ten Yuv420...
  FAIL: Failed to create encoder: No suitable Vulkan physical device found: Failed to query Vulkan Video encode capabilities for requested H.264 profile: ERROR_VIDEO_PROFILE_FORMAT_NOT_SUPPORTED_KHR
------------------------------------------------
Testing H264 Ten Yuv444...
  FAIL: Failed to create encoder: No suitable Vulkan physical device found: Failed to query Vulkan Video encode capabilities for requested H.264 profile: ERROR_VIDEO_PROFILE_FORMAT_NOT_SUPPORTED_KHR
------------------------------------------------
Testing H265 Eight Yuv420...
  PASS: PSNR = 62.39 dB
------------------------------------------------
Testing H265 Eight Yuv444...
  PASS: PSNR = 64.04 dB
------------------------------------------------
Testing H265 Ten Yuv420...
  PASS: PSNR = 59.94 dB
------------------------------------------------
Testing H265 Ten Yuv444...
  PASS: PSNR = 61.29 dB
------------------------------------------------
Testing AV1 Eight Yuv420...
2026-02-28T22:53:01.793992Z  WARN pixelforge::encoder::av1::init: AV1 encoding is experimental. On NVIDIA GPUs, P-frames cannot reference other P-frames, causing all P-frames to reference the I-frame instead. This leads to progressively larger frame sizes over time. Consider using H.264 or HEVC until this is resolved.
  PASS: PSNR = 58.66 dB
------------------------------------------------
Testing AV1 Eight Yuv444...
2026-02-28T22:53:01.877619Z  WARN pixelforge::encoder::av1::init: AV1 encoding is experimental. On NVIDIA GPUs, P-frames cannot reference other P-frames, causing all P-frames to reference the I-frame instead. This leads to progressively larger frame sizes over time. Consider using H.264 or HEVC until this is resolved.
  FAIL: Failed to create encoder: No suitable Vulkan physical device found: Failed to query Vulkan Video encode capabilities for AV1: ERROR_VIDEO_PROFILE_FORMAT_NOT_SUPPORTED_KHR
------------------------------------------------
Testing AV1 Ten Yuv420...
2026-02-28T22:53:01.877685Z  WARN pixelforge::encoder::av1::init: AV1 encoding is experimental. On NVIDIA GPUs, P-frames cannot reference other P-frames, causing all P-frames to reference the I-frame instead. This leads to progressively larger frame sizes over time. Consider using H.264 or HEVC until this is resolved.
  PASS: PSNR = 53.02 dB
------------------------------------------------
Testing AV1 Ten Yuv444...
2026-02-28T22:53:01.987419Z  WARN pixelforge::encoder::av1::init: AV1 encoding is experimental. On NVIDIA GPUs, P-frames cannot reference other P-frames, causing all P-frames to reference the I-frame instead. This leads to progressively larger frame sizes over time. Consider using H.264 or HEVC until this is resolved.
  FAIL: Failed to create encoder: No suitable Vulkan physical device found: Failed to query Vulkan Video encode capabilities for AV1: ERROR_VIDEO_PROFILE_FORMAT_NOT_SUPPORTED_KHR

[Copilot]

Pull request overview

Adds AV1 encoding support to PixelForge (Vulkan Video), extending codec discovery/device creation to include AV1 and introducing a new AV1 encoder implementation alongside small refactors to shared encode utilities and examples/docs.

Changes:

• Add AV1 codec discovery, device extension enabling, and feature chaining in Vulkan device creation.
• Introduce a new encoder::av1 module (init/encode/api) and wire it into the Encoder enum plus EncodeConfig::av1.
• Update docs/examples to mention and exercise AV1, and refactor shared H.264/H.265 encode submission helpers.

Reviewed changes

Copilot reviewed 18 out of 19 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
src/vulkan.rs	Detect AV1 encode support + enable AV1 device extensions/features conditionally.
src/lib.rs	Update crate docs to include AV1 and add AV1 example reference/warning.
src/image.rs	Rework InputImage to be transfer-only staging image; add upload_yuv420_to.
src/encoder/resources.rs	Tighten DPB barrier masks/stages and factor out shared encode CB prep + submit/read helpers.
src/encoder/mod.rs	Add EncodeConfig::av1, add Encoder::AV1, and route encode/flush/idr calls.
src/encoder/h264/encode.rs	Use shared encode command buffer prep + submit/read helper.
src/encoder/h265/encode.rs	Use shared encode command buffer prep + submit/read helper; factor DPB post barrier.
src/encoder/av1/mod.rs	New AV1 encoder core type + resource tracking + tests.
src/encoder/av1/init.rs	New AV1 session setup, capabilities query, resource creation, session params.
src/encoder/av1/encode.rs	New AV1 per-frame encode recording/submission path.
src/encoder/av1/api.rs	New AV1 public API (encode/flush/request_idr) and sequence header retrieval.
examples/verify_all.rs	Add AV1 to verification matrix; adjust testdata naming + upload path.
examples/query_capabilities.rs	Add tracing init (RUST_LOG support).
examples/encode_h264.rs	Switch tracing init to EnvFilter-based configuration.
examples/encode_h265.rs	Switch tracing init to EnvFilter-based configuration.
examples/encode_av1.rs	New AV1 encoding example.
README.md	Document AV1 support and add AV1 example + warning.
Cargo.toml	Pin ash to a specific git rev with needed Vulkan AV1 bindings.
Cargo.lock	Update locked ash revision/version metadata accordingly.

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[Copilot]

Pull request overview

Copilot reviewed 18 out of 19 changed files in this pull request and generated 3 comments.

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