Port the CMAF streaming playback path from the Tauri v2_play_track /
v2_cmaf_stream reference into the qbz-player core crate so any shell
gets CMAF transparently.
play_track now tries qbz_qobuz::cmaf::setup_streaming first: it fetches
only the init segment, derives sample rate / bit depth / total FLAC
size, estimates speed from init_fetch_ms, starts playback via the
existing play_streaming_dynamic, and spawns a background task that
fetches + decrypts + pushes audio segments. On setup failure it falls
back to the legacy get_stream_url_with_fallback + download_audio +
play_data path, which is kept unchanged.
The new private cmaf_stream_segments method ports the v2_cmaf_stream
fetch/decrypt/push loop: FLAC header first, per-segment reqwest get,
parse_segment_crypto, decrypt_frame for encrypted frames, push_chunk
to the streaming buffer, complete() at the end. The L1/L2 cache
parameters and cache calls from the reference are intentionally
omitted (separate later phase).
play_track's public signature and the bit-perfect output path are
unchanged.
cc
vicrodh
74ab627c40