Eyevinn / moqlivemock / 25302521797

45%

main: 44%

Build Type

Pull #77

github

Committed by tobbee

Commit Message

feat(catalog): expose accurate per-packaging bitrate

Catalog Bitrate now reflects the actual wire footprint of each track,
correctly differentiating clear CMAF, encrypted CMAF (cenc/cbcs), and
LOC. Previously all CMAF tracks shared one estimator (constants from
draft-09 mp4ff layout) and LOC reported the raw sample bitrate — so
encryption overhead and LOC framing were invisible to clients.

- calcCmafBitrate measures actual chunk size via GenCMAFChunk for the
  track's real configuration (sample batch, encryption scheme,
  subsample density). Self-consistent under future packaging tweaks.
- calcLOCBitrate adds per-object MoQ + LOC Timestamp extension overhead
  and (for video) the VPS/SPS/PPS prepended to every IRAP frame.
- GenCMAFChunk enables mp4ff OptimizeTrun, which promotes constant
  per-sample fields into tfhd defaults. Audio per-extra-sample drops
  from 16 B to ~3 B (4 B sample-size, 0 B for tracks with constant
  sample size), shaving real bytes off every audio chunk on the wire.

Pull Request Pull Request #77: feat(catalog): expose accurate per-packaging bitrate

Coverage Stats

35 of 47 new or added lines in 1 file covered. (74.47%)

37 existing lines in 3 files now uncovered.

1860 of 4130 relevant lines covered (45.04%)

1070.2 hits per line