Picking a session with Open Session or dropping one on the page in the
browser replaced the document as soon as its bytes were read, without the
Save Changes question the native Open goes through, so unsaved edits and
their undo history were lost. The bytes now wait behind that question,
asked when the read finishes: Don't Save opens them, Save saves first and
then opens them, Cancel drops them and leaves the document alone.
A bounce keeps its own snapshot of the session, decoded audio included.
The progress window blocks the mouse, but shortcuts, the macOS menu bar,
dropped files and the control channel still reach SoundApp::run, so a
second session could be opened beside the one bouncing; two large ones
could exhaust memory, which aborts the app.
New, Open, Close and Revert now fail with "Finish or cancel the bounce
first" while a bounce runs, and so do sessions opened or dropped in the
browser.
Built-in instruments now open a window with their parameters (driven by
mix.instrument_param). The Sampler's window adds a waveform with draggable
start and loop markers, Load Sample and Clear. Dropping an audio file on an
instrument track or a Sampler window loads it; in the browser the dropped
bytes are read and loaded through engine::io::load_sampler_bytes as one undo
step.
M4B is the same MP4/AAC container as M4A, and the decoder already reads it,
but the Open dialog, the web file picker and the file browser hid .m4b files.
Add m4b to those lists and to the extension fallback.
The web build could not reach any file: File > Open Session…, Import > Audio… and Import > MIDI…
showed a text box for a path the browser can't read, and every save or export failed with
«operation not supported on this platform», so work was lost on close.
On the web now:
- Open Session…, Import Audio… and Import MIDI… show the browser's file picker; files dropped on
the page open (sessions) or import (audio, MIDI) by extension. Files travel as bytes; imports are
one undo step each, like the import commands.
- A session is saved as ONE file, a bundle `<name>.scraftz`: a zip (stored entries) holding the
`.scraft` and its `Audio Files/` as 32-bit float WAV — the same layout as a session folder, since
the browser has no folders. `io::open_session_bytes` opens a bundle or a bare `.scraft` (its audio
is then reported missing). Bundles are hostile input: entry count and size are capped, and
declared sizes are never read past.
- Every single-file output (save, Save As Template, bounce, MIDI/score/text export, track presets)
goes through `io::write_file`: a file natively, a download in the browser via a delivery hook
(`io::set_deliver`) that only the web app installs.
- In the browser Save As asks for the bundle's name (`<name>.scraftz`) instead of a folder path.
Native builds keep writing files and session folders as before. Folder outputs (stems, clip
exports) are still not available on the web.
Pairs with #157 (Save on a never-saved session opens Save As), which the browser needs too: the
web app always starts on the unsaved demo.
New dependency: `zip` (MIT), default features off (stored entries only).
Checked: engine tests for the bundle round trip (every sample identical), same-named sources,
bare sessions and hostile bundles; `cargo xtask ci`. In Chromium on the packaged web build:
⌘⇧I picks and imports a WAV; WAV, MP3, FLAC, OGG, M4A, AIFF and MIDI import by drop; Save As →
`Midnight Groove.scraftz` downloads with the imported audio inside; that bundle reopens in a fresh
page with all tracks and no missing media, and saves again with the same content.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
cpal (wasm) creates its output stream at startup, before any user gesture, so the browser leaves the WebAudio AudioContext 'suspended'. As a result no audio plays, and the transport clock never advances because the audio callback drives it.
Wrap the AudioContext constructor before the wasm module loads so that every context cpal creates is captured. On the first pointer, mouse, touch or key event, resume any context that is still suspended.
Signed-off-by: Ahmed Moussa <moussa.ahmed95@gmail.com>
Marco Arnulfo