Crate mediaway_test_media 

Deterministic test-media generators with a local gitignored cache.

Cache hits are validated with BLAKE3 against an expected digest — same path alone is not enough. Binaries must not be committed — see docs/conventions/testing.md.

Enums

TestMediaError

Errors from fixture ensure / generate.

Constants

DEFAULT_CACHE_DIR_NAME

Default cache directory name under the workspace root.

PCM_SILENCE_48K_STEREO_20MS_BLAKE3

BLAKE3 hex digest of 20 ms of silent 48 kHz stereo 16-bit PCM (pcm/silence_48k_stereo_20ms.pcm).

SOLID_GRAY_NV12_64X64_BLAKE3

BLAKE3 hex digest of a 64×64 mid-gray NV12 frame (solid/gray_nv12_64x64.yuv).

SOLID_RED_64X64_BLAKE3

BLAKE3 hex digest of a 64×64 opaque red RGBA8 frame (solid/red_64x64.rgba).

Functions

cache_dir

Resolve the local fixture cache directory.

ensure

Ensure relative_name exists under the cache and matches expected_blake3_hex.

ensure_pcm_silence_48k_stereo_20ms

Ensure 20 ms of silent 48 kHz stereo 16-bit PCM (pcm/silence_48k_stereo_20ms.pcm).

ensure_solid_gray_nv12_64x64

Ensure a 64×64 mid-gray NV12 fixture (solid/gray_nv12_64x64.yuv).

ensure_solid_red_64x64

Ensure a 64×64 opaque red RGBA8 fixture (solid/red_64x64.rgba).

hash_bytes

BLAKE3 hex digest of an in-memory buffer.

hash_file

BLAKE3 hex digest of a file (streaming).

pcm_silence_bytes

In-memory silent interleaved 16-bit PCM buffer (frames_per_channel * channels * 2 bytes, all zero).

solid_nv12_bytes

In-memory solid-color NV12 buffer (layout matches write_solid_nv12).

solid_rgba8_bytes

In-memory solid RGBA8 buffer (for digest computation / tiny fixtures).

write_pcm_silence

Write a silent interleaved 16-bit PCM buffer.

write_solid_nv12

Write a solid-color NV12 frame: width * height luma bytes, then width * height / 2 bytes of interleaved chroma (U, V, U, V, … per row).

write_solid_rgba8

Write a solid-color packed RGBA8 frame (width * height * 4 bytes).