mirror of
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59 lines
3.3 KiB
Markdown
59 lines
3.3 KiB
Markdown
# iOS FFmpeg capability probe
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`scripts/ios_ffmpeg_capabilities.m` runs the shipped simulator frameworks without
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building the Flutter app. It checks FLAC, ALAC, 24-bit WAV/AIFF, MP3, Opus and AAC
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encoding/decoding; analysis filters; spectrum PNG/JPEG conversion; and H.264/HEVC
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motion decoding and stream-copy remuxing. This complements application tests: it
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does not prove Flutter routing, download finalization or the Dart TLS proxy.
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Prepare the audio plugin's XCFrameworks with its provided `scripts/setup_ios.sh`
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from the plugin's `ios` directory. Boot an iOS simulator, then run the following
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from the repository root. Framework copies are signed in a temporary directory;
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the downloaded vendor artifacts remain unchanged.
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```bash
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probe_plugin="$HOME/.pub-cache/hosted/pub.dev/ffmpeg_kit_flutter_new_audio-2.5.2"
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probe_work=$(mktemp -d /tmp/spotiflac-ios-ffmpeg.XXXXXX)
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mkdir -p "$probe_work/Frameworks"
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for framework in "$probe_plugin"/ios/Frameworks/*.xcframework; do
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name=$(basename "$framework" .xcframework)
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cp -R "$framework/ios-arm64_x86_64-simulator/$name.framework" "$probe_work/Frameworks/"
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codesign --force --sign - "$probe_work/Frameworks/$name.framework"
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done
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xcrun --sdk iphonesimulator clang -fobjc-arc -target arm64-apple-ios16.0-simulator \
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-isysroot "$(xcrun --sdk iphonesimulator --show-sdk-path)" \
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-F "$probe_work/Frameworks" -framework Foundation -framework ffmpegkit \
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-Wl,-rpath,"$probe_work/Frameworks" scripts/ios_ffmpeg_capabilities.m \
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-o "$probe_work/probe"
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codesign --force --sign - "$probe_work/probe"
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xcrun simctl spawn booted "$probe_work/probe" "$probe_work/results" \
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"$PWD/android/app/src/androidTest/assets"
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```
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The audio package exposes HTTP but has no native HTTPS/TLS support. Remote motion
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input requires the app's scoped Dart TLS proxy. To exercise remote input, append
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a fixture URL as the last probe argument; use the proxy's HTTP loopback URL when
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testing the application route. Passing a direct HTTPS URL intentionally reports
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a capability failure on this package. Run the proxy's Dart tests and Android/iOS
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application checks before claiming that remote motion playback is preserved.
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Remote checks decode the complete fixture, stream-copy it to MP4 with faststart,
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and decode the resulting MP4 with strict error handling. The probe also prints
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the shipped HLS demuxer's options. For HLS fixtures with opaque segment URLs,
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append `--disable-hls-extension-check` after the proxy URL; this passes
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`-extension_picky 0` only for that input. The other HLS flags in the usage message
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are diagnostic modes for comparing the native extension checks.
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Verified on the shipped iOS simulator audio frameworks:
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| HTTPS-origin fixture through the Dart proxy | Input options | Decode/remux/decode |
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| --- | --- | --- |
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| Redirected master playlist, AES-128 key, three TS segments | Defaults | Pass |
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| Same content with `.bin`, extensionless and `.ts` segment URLs | Defaults | Rejects segment extension |
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| Same opaque segment URLs | `-allowed_extensions ALL` | Rejects segment extension |
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| Same opaque segment URLs | Both extension lists set to `ALL` | Rejects format/extension mismatch |
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| Same opaque segment URLs | `-extension_picky 0` | Pass |
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The app uses the final option for scoped HLS proxy input. The proxy still owns
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the upstream URL allowlist, TLS requests, transfer budget and cancellation.
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