FFmpeg software H.264 decoder: opt-in via pubspec flag
- Gate buildFfmpegJni + jniLibs packaging on `ux: enable_ffmpeg` in the consuming app's pubspec (default off) -- no LGPL / H.264-patent exposure unless explicitly enabled - appInfoBuilder generates kUxEnableFfmpeg from the same flag so apps register the FFmpeg LGPL notice eagerly, pubspec-only (no dart-define) - Add registerFfmpegLicense() + bundled LGPL-2.1 text asset - FFmpeg compliance docs (LICENSES-3RDPARTY.md, android/ffmpeg/README.md) - Network video streaming: XVideoPlayerController.network
This commit is contained in:
agra
76
LICENSES-3RDPARTY.md
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76
LICENSES-3RDPARTY.md
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@@ -0,0 +1,76 @@
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# ux — Third-Party Licenses & Compliance
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`ux` can bundle one component with distribution obligations: **FFmpeg**, used
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as a software H.264 video decoder on Android. It is **opt-in and disabled by
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default** — only apps that enable it ship it and inherit the obligation:
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```yaml
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ux:
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enable_ffmpeg: true
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```
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That pubspec flag is the single source of truth: Gradle reads it for the
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native build, and ux's build_runner builder generates a `kUxEnableFfmpeg`
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constant from it into the app's `app_info.g.dart`, which gates
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`registerFfmpegLicense()` at startup — so the in-app LGPL notice follows
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automatically, eagerly, with no `--dart-define`.
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Apps that enable it need to (a) surface a license UI and (b) be able to honor
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the source offer below; apps that leave it disabled have no FFmpeg obligation
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(and the in-app notice never appears).
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## FFmpeg (LGPL-2.1) — Android only
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### What and where
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Compiled from source into `libffmpegJNI.so` per ABI and loaded at runtime via
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`System.loadLibrary` — an ExoPlayer/Media3 fallback **decode-only** renderer.
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Not a pub/Dart dependency. iOS/macOS use AVFoundation → **no FFmpeg, no
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obligation** there.
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- Build wiring: [android/ffmpeg/](android/ffmpeg/) — `build_ffmpeg.sh`,
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`CMakeLists.txt`, `ffmpeg_jni.cc`, `README.md`, `LICENSE-FFMPEG.txt`.
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- Attribution: [lib/builder.dart](lib/builder.dart) generates a
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`kUxEnableFfmpeg` constant from the app's `ux: enable_ffmpeg` pubspec flag
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into `app_info.g.dart`; the app gates
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[registerFfmpegLicense()](lib/src/video/ffmpeg_license.dart) on it at
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startup (`if (kUxEnableFfmpeg) registerFfmpegLicense();`). So a build with
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the flag off registers nothing, and an enabled build shows the notice
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eagerly. Idempotent.
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- Bundled LGPL text asset: `assets/licenses/ffmpeg_LGPL-2.1.txt`.
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### Versions (pinned)
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- FFmpeg **`release/6.0`** (upstream `git.ffmpeg.org`)
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- Media3 **`1.9.2`** (JNI/renderer skeleton)
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### License posture
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- **LGPL v2.1**, dynamic boundary (separate, replaceable `.so`) → **no
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copyleft on the consuming app**.
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- Built **decode-only** (H.264 decoder, **no encoders**) and **WITHOUT
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`--enable-gpl` / `--enable-nonfree`** → **LGPL-only**. See `build_ffmpeg.sh`.
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### How we comply (LGPL-2.1)
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1. **Attribution + license text** — registered via `registerFfmpegLicense()`,
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shown in any consuming app's license UI. ✅
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2. **Corresponding source** — we make the FFmpeg `release/6.0` source **plus
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the build/link scripts** (`build_ffmpeg.sh`, `CMakeLists.txt`,
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`ffmpeg_jni.cc`) available **on request for ≥3 years**. **This does NOT
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include the application's own source code** — only the LGPL library and the
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scripts that compile/link it. Contact: **alex@swipelab.co**.
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→ *Each release: archive the matching FFmpeg source tarball + the scripts.*
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3. **Relink right (LGPL §6)** — `libffmpegJNI.so` is a standalone,
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user-rebuildable shared library; sources + script are here, so a modified
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FFmpeg can be rebuilt and swapped in. ✅
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4. **Do not taint** — never add `--enable-gpl` / `--enable-nonfree` or
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GPL-only codecs (x264, x265, …).
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### Patent note (for legal — separate from copyright)
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FFmpeg's H.264 *decoder code* is LGPL, but the **H.264/AVC standard** is
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patent-encumbered (Via LA pool, formerly MPEG-LA). We ship a **software AVC
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decoder** — a patent/commercial matter for counsel, **not** an open-source or
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store-policy issue. Exposure is limited to **decode** (no encoder shipped).
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## Release checklist
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- [ ] FFmpeg/Media3 tags unchanged, or doc + archived source updated if bumped.
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- [ ] Build still omits `--enable-gpl` / `--enable-nonfree`; decode-only.
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- [ ] `registerFfmpegLicense()` reachable (auto on video, or eager at startup).
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- [ ] FFmpeg `release/6.0` source tarball + scripts archived for this version.
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@@ -24,9 +24,59 @@ rootProject.allprojects {
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apply plugin: 'com.android.library'
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apply plugin: 'kotlin-android'
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// FFmpeg software H.264 decoder — OPT-IN, disabled by default.
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//
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// The decoder (a fallback for devices whose hardware decoder fails) carries
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// LGPL + H.264 patent obligations, so it is only bundled when the consuming
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// app asks for it, via a flag in its pubspec.yaml:
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//
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// ux:
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// enable_ffmpeg: true
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//
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// (or -Pux.enable_ffmpeg=true on the Gradle command line as a CI override).
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// When off: buildFfmpegJni is skipped, no libffmpegJNI.so is packaged,
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// FfmpegLibrary.isAvailable() returns false, the renderer is never added, and
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// playback uses the platform MediaCodec decoders only. See android/ffmpeg/README.md.
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//
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// This pubspec flag is the only switch: ux's build_runner builder also reads
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// `ux: enable_ffmpeg` and generates a `kUxEnableFfmpeg` constant the app uses
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// to register the LGPL license notice — no --dart-define needed.
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def ffmpegEnabled = {
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// CI / command-line override takes precedence over the pubspec flag.
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def prop = project.findProperty('ux.enable_ffmpeg')
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if (prop != null) return prop.toString().trim().equalsIgnoreCase('true')
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// rootProject is the consuming app's android/ project; its pubspec.yaml
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// sits one directory up. Match a top-level `ux:` block (not the indented
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// `ux:` dependency entry) and its nested `enable_ffmpeg:` value.
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def pubspec = new File(rootProject.projectDir.parentFile, 'pubspec.yaml')
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if (!pubspec.exists()) return false
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boolean inUxBlock = false
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boolean enabled = false
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pubspec.eachLine { raw ->
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def hash = raw.indexOf('#')
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def line = hash >= 0 ? raw.substring(0, hash) : raw
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if (line.trim().isEmpty()) return
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if (!Character.isWhitespace(line.charAt(0))) {
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// A new top-level key: we're in the config block only if it's `ux:`.
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inUxBlock = line.trim().startsWith('ux:')
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} else if (inUxBlock) {
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def t = line.trim()
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if (t.startsWith('enable_ffmpeg:')) {
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enabled = t.substring('enable_ffmpeg:'.length()).trim().equalsIgnoreCase('true')
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}
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}
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}
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return enabled
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}()
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android {
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namespace 'io.swipelab.ux'
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compileSdk 34
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// media3 1.9.2 requires compileSdk >= 35; match the app/Flutter default (36).
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compileSdk 36
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// Match Flutter's pinned NDK (flutter_tools gradle_utils.dart) and the
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// app; AGP 8.1's default NDK (25.x) isn't installed on dev machines.
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ndkVersion '28.2.13676358'
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defaultConfig {
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minSdk 21
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@@ -55,21 +105,23 @@ android {
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sourceSets {
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main {
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// libffmpegJNI.so is built by the buildFfmpegJni task into
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// build/jniLibs/<abi>/ on first build (and any time the
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// vendored ffmpeg_jni.cc / CMakeLists.txt change). Adding
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// the directory here lets AGP package the .so into the
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// build/jniLibs/<abi>/. Only reference it when FFmpeg is enabled,
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// so a stale .so from a previous enabled build is not packaged
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// into a now-disabled build. Lets AGP package the .so into the
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// AAR without committing native binaries to the repo.
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jniLibs.srcDirs += "$buildDir/jniLibs"
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if (ffmpegEnabled) {
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jniLibs.srcDirs += "$buildDir/jniLibs"
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}
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}
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}
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}
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// FFmpeg video decoder build — runs as part of the normal Android
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// build. On first build for a given checkout it clones Media3 + FFmpeg
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// into build/ffmpeg-work/ and produces libffmpegJNI.so per ABI (~30 min
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// for the FFmpeg static-lib step the first time, fast after). Gradle
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// UP-TO-DATE checking skips the task whenever the vendored JNI source
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// + CMakeLists are unchanged. See android/ffmpeg/README.md.
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// FFmpeg video decoder build (opt-in — see the `ffmpegEnabled` flag near the
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// top of this file and android/ffmpeg/README.md). When enabled, the first
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// build for a checkout clones Media3 + FFmpeg into build/ffmpeg-work/ and
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// produces libffmpegJNI.so per ABI (~30 min for the FFmpeg static-lib step the
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// first time, fast after); Gradle UP-TO-DATE checking skips it when the
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// vendored JNI source + CMakeLists are unchanged.
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def ffmpegSrcDir = file("$projectDir/ffmpeg")
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def ffmpegWorkDir = file("$buildDir/ffmpeg-work")
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def ffmpegOutDir = file("$buildDir/jniLibs")
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@@ -97,7 +149,13 @@ task buildFfmpegJni(type: Exec) {
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}
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afterEvaluate {
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preBuild.dependsOn buildFfmpegJni
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if (ffmpegEnabled) {
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preBuild.dependsOn buildFfmpegJni
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logger.lifecycle("ux: FFmpeg software H.264 decoder ENABLED (ux: enable_ffmpeg: true).")
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} else {
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logger.lifecycle("ux: FFmpeg software H.264 decoder disabled (default). " +
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"Add 'ux:\\n enable_ffmpeg: true' to the app pubspec.yaml to bundle it.")
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}
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}
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dependencies {
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@@ -7,13 +7,34 @@ slotted ahead of `MediaCodecVideoRenderer` so iOS H.264 streams with
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deep DPB (`has_b_frames > 8`) and full-range YUV play on devices where
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the platform decoder fails (notably Huawei Mate 20 on EMUI 11).
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## Opt-in
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FFmpeg is **disabled by default** (it carries LGPL + H.264 patent
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obligations). A consuming app enables it with a flag in its `pubspec.yaml`:
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|
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```yaml
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ux:
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enable_ffmpeg: true
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```
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|
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(or `-Pux.enable_ffmpeg=true` on the Gradle command line as a CI override).
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||||
When disabled, no `libffmpegJNI.so` is built or packaged, `FfmpegLibrary
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.isAvailable()` returns false, the renderer is never added, and playback
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uses the platform MediaCodec decoders only.
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||||
|
||||
The pubspec flag is the **only** switch. The in-app LGPL license notice
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||||
follows automatically: ux's build_runner builder ([lib/builder.dart](../../lib/builder.dart))
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reads `ux: enable_ffmpeg` from the app's pubspec and generates
|
||||
`kUxEnableFfmpeg` into the app's `app_info.g.dart`; the app gates
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||||
`registerFfmpegLicense()` on that constant at startup. No `--dart-define`, no
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||||
duplication — and the notice shows without needing to play a video.
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## How it builds
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||||
The native library is produced by the `:ux:buildFfmpegJni` Gradle task,
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||||
wired as a dependency of `preBuild`. On any consumer build
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||||
(`flutter build apk`, `./gradlew assembleRelease`, IDE sync) the task
|
||||
runs automatically; Gradle's UP-TO-DATE checking skips it when nothing
|
||||
relevant changed.
|
||||
When enabled, the native library is produced by the `:ux:buildFfmpegJni`
|
||||
Gradle task, wired as a dependency of `preBuild`. The task runs on a
|
||||
consumer build (`flutter build apk`, `./gradlew assembleRelease`, IDE
|
||||
sync); Gradle's UP-TO-DATE checking skips it when nothing relevant changed.
|
||||
|
||||
What the task does:
|
||||
|
||||
|
||||
502
assets/licenses/ffmpeg_LGPL-2.1.txt
Normal file
502
assets/licenses/ffmpeg_LGPL-2.1.txt
Normal file
@@ -0,0 +1,502 @@
|
||||
GNU LESSER GENERAL PUBLIC LICENSE
|
||||
Version 2.1, February 1999
|
||||
|
||||
Copyright (C) 1991, 1999 Free Software Foundation, Inc.
|
||||
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
Everyone is permitted to copy and distribute verbatim copies
|
||||
of this license document, but changing it is not allowed.
|
||||
|
||||
[This is the first released version of the Lesser GPL. It also counts
|
||||
as the successor of the GNU Library Public License, version 2, hence
|
||||
the version number 2.1.]
|
||||
|
||||
Preamble
|
||||
|
||||
The licenses for most software are designed to take away your
|
||||
freedom to share and change it. By contrast, the GNU General Public
|
||||
Licenses are intended to guarantee your freedom to share and change
|
||||
free software--to make sure the software is free for all its users.
|
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|
||||
This license, the Lesser General Public License, applies to some
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specially designated software packages--typically libraries--of the
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Free Software Foundation and other authors who decide to use it. You
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can use it too, but we suggest you first think carefully about whether
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this license or the ordinary General Public License is the better
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strategy to use in any particular case, based on the explanations below.
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When we speak of free software, we are referring to freedom of use,
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not price. Our General Public Licenses are designed to make sure that
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you have the freedom to distribute copies of free software (and charge
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for this service if you wish); that you receive source code or can get
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it if you want it; that you can change the software and use pieces of
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To protect your rights, we need to make restrictions that forbid
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For example, if you distribute copies of the library, whether gratis
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or for a fee, you must give the recipients all the rights that we gave
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you. You must make sure that they, too, receive or can get the source
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code. If you link other code with the library, you must provide
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complete object files to the recipients, so that they can relink them
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with the library after making changes to the library and recompiling
|
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it. And you must show them these terms so they know their rights.
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We protect your rights with a two-step method: (1) we copyright the
|
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library, and (2) we offer you this license, which gives you legal
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permission to copy, distribute and/or modify the library.
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|
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To protect each distributor, we want to make it very clear that
|
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there is no warranty for the free library. Also, if the library is
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modified by someone else and passed on, the recipients should know
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that what they have is not the original version, so that the original
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author's reputation will not be affected by problems that might be
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introduced by others.
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Finally, software patents pose a constant threat to the existence of
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any free program. We wish to make sure that a company cannot
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effectively restrict the users of a free program by obtaining a
|
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restrictive license from a patent holder. Therefore, we insist that
|
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any patent license obtained for a version of the library must be
|
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consistent with the full freedom of use specified in this license.
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||||
Most GNU software, including some libraries, is covered by the
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ordinary GNU General Public License. This license, the GNU Lesser
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General Public License, applies to certain designated libraries, and
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is quite different from the ordinary General Public License. We use
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When a program is linked with a library, whether statically or using
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combined work, a derivative of the original library. The ordinary
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entire combination fits its criteria of freedom. The Lesser General
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We call this license the "Lesser" General Public License because it
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does Less to protect the user's freedom than the ordinary General
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of an advantage over competing non-free programs. These disadvantages
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In other cases, permission to use a particular library in non-free
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Although the Lesser General Public License is Less protective of the
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linked with the Library has the freedom and the wherewithal to run
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The precise terms and conditions for copying, distribution and
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former contains code derived from the library, whereas the latter must
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||||
GNU LESSER GENERAL PUBLIC LICENSE
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TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
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||||
0. This License Agreement applies to any software library or other
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Each licensee is addressed as "you".
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A "library" means a collection of software functions and/or data
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|
||||
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|
||||
|
||||
You may charge a fee for the physical act of transferring a copy,
|
||||
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|
||||
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|
||||
|
||||
2. You may modify your copy or copies of the Library or any portion
|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
|
||||
d) If a facility in the modified Library refers to a function or a
|
||||
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|
||||
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|
||||
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|
||||
in the event an application does not supply such function or
|
||||
table, the facility still operates, and performs whatever part of
|
||||
its purpose remains meaningful.
|
||||
|
||||
(For example, a function in a library to compute square roots has
|
||||
a purpose that is entirely well-defined independent of the
|
||||
application. Therefore, Subsection 2d requires that any
|
||||
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|
||||
be optional: if the application does not supply it, the square
|
||||
root function must still compute square roots.)
|
||||
|
||||
These requirements apply to the modified work as a whole. If
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
Thus, it is not the intent of this section to claim rights or contest
|
||||
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|
||||
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||||
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|
||||
|
||||
In addition, mere aggregation of another work not based on the Library
|
||||
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|
||||
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|
||||
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|
||||
|
||||
3. You may opt to apply the terms of the ordinary GNU General Public
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
Once this change is made in a given copy, it is irreversible for
|
||||
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|
||||
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|
||||
|
||||
This option is useful when you wish to copy part of the code of
|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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||||
|
||||
If distribution of object code is made by offering access to copy
|
||||
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|
||||
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|
||||
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||||
|
||||
5. A program that contains no derivative of any portion of the
|
||||
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||||
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||||
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|
||||
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||||
|
||||
However, linking a "work that uses the Library" with the Library
|
||||
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|
||||
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|
||||
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|
||||
Section 6 states terms for distribution of such executables.
|
||||
|
||||
When a "work that uses the Library" uses material from a header file
|
||||
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|
||||
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||||
Whether this is true is especially significant if the work can be
|
||||
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|
||||
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||||
|
||||
If such an object file uses only numerical parameters, data
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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||||
|
||||
Otherwise, if the work is a derivative of the Library, you may
|
||||
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|
||||
Any executables containing that work also fall under Section 6,
|
||||
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|
||||
|
||||
6. As an exception to the Sections above, you may also combine or
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
You must give prominent notice with each copy of the work that the
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
interface-compatible with the version that the work was made with.
|
||||
|
||||
c) Accompany the work with a written offer, valid for at
|
||||
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|
||||
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|
||||
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|
||||
|
||||
d) If distribution of the work is made by offering access to copy
|
||||
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|
||||
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|
||||
|
||||
e) Verify that the user has already received a copy of these
|
||||
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||||
|
||||
For an executable, the required form of the "work that uses the
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
It may happen that this requirement contradicts the license
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
7. You may place library facilities that are a work based on the
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
b) Give prominent notice with the combined library of the fact
|
||||
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|
||||
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|
||||
|
||||
8. You may not copy, modify, sublicense, link with, or distribute
|
||||
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|
||||
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||||
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|
||||
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|
||||
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|
||||
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||||
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||||
9. You are not required to accept this License, since you have not
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||||
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|
||||
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|
||||
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|
||||
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|
||||
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||||
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||||
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||||
|
||||
10. Each time you redistribute the Library (or any work based on the
|
||||
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|
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|
||||
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|
||||
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|
||||
You are not responsible for enforcing compliance by third parties with
|
||||
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|
||||
|
||||
11. If, as a consequence of a court judgment or allegation of patent
|
||||
infringement or for any other reason (not limited to patent issues),
|
||||
conditions are imposed on you (whether by court order, agreement or
|
||||
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|
||||
excuse you from the conditions of this License. If you cannot
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
refrain entirely from distribution of the Library.
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||||
|
||||
If any portion of this section is held invalid or unenforceable under any
|
||||
particular circumstance, the balance of the section is intended to apply,
|
||||
and the section as a whole is intended to apply in other circumstances.
|
||||
|
||||
It is not the purpose of this section to induce you to infringe any
|
||||
patents or other property right claims or to contest validity of any
|
||||
such claims; this section has the sole purpose of protecting the
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
This section is intended to make thoroughly clear what is believed to
|
||||
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|
||||
|
||||
12. If the distribution and/or use of the Library is restricted in
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
13. The Free Software Foundation may publish revised and/or new
|
||||
versions of the Lesser General Public License from time to time.
|
||||
Such new versions will be similar in spirit to the present version,
|
||||
but may differ in detail to address new problems or concerns.
|
||||
|
||||
Each version is given a distinguishing version number. If the Library
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
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|
||||
|
||||
14. If you wish to incorporate parts of the Library into other free
|
||||
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|
||||
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|
||||
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|
||||
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|
||||
decision will be guided by the two goals of preserving the free status
|
||||
of all derivatives of our free software and of promoting the sharing
|
||||
and reuse of software generally.
|
||||
|
||||
NO WARRANTY
|
||||
|
||||
15. BECAUSE THE LIBRARY IS LICENSED FREE OF CHARGE, THERE IS NO
|
||||
WARRANTY FOR THE LIBRARY, TO THE EXTENT PERMITTED BY APPLICABLE LAW.
|
||||
EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR
|
||||
OTHER PARTIES PROVIDE THE LIBRARY "AS IS" WITHOUT WARRANTY OF ANY
|
||||
KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
||||
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE
|
||||
LIBRARY IS WITH YOU. SHOULD THE LIBRARY PROVE DEFECTIVE, YOU ASSUME
|
||||
THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
|
||||
|
||||
16. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN
|
||||
WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY
|
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AND/OR REDISTRIBUTE THE LIBRARY AS PERMITTED ABOVE, BE LIABLE TO YOU
|
||||
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|
||||
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|
||||
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|
||||
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
|
||||
FAILURE OF THE LIBRARY TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
|
||||
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
|
||||
DAMAGES.
|
||||
|
||||
END OF TERMS AND CONDITIONS
|
||||
|
||||
How to Apply These Terms to Your New Libraries
|
||||
|
||||
If you develop a new library, and you want it to be of the greatest
|
||||
possible use to the public, we recommend making it free software that
|
||||
everyone can redistribute and change. You can do so by permitting
|
||||
redistribution under these terms (or, alternatively, under the terms of the
|
||||
ordinary General Public License).
|
||||
|
||||
To apply these terms, attach the following notices to the library. It is
|
||||
safest to attach them to the start of each source file to most effectively
|
||||
convey the exclusion of warranty; and each file should have at least the
|
||||
"copyright" line and a pointer to where the full notice is found.
|
||||
|
||||
<one line to give the library's name and a brief idea of what it does.>
|
||||
Copyright (C) <year> <name of author>
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
This library is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||||
Lesser General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU Lesser General Public
|
||||
License along with this library; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
|
||||
Also add information on how to contact you by electronic and paper mail.
|
||||
|
||||
You should also get your employer (if you work as a programmer) or your
|
||||
school, if any, to sign a "copyright disclaimer" for the library, if
|
||||
necessary. Here is a sample; alter the names:
|
||||
|
||||
Yoyodyne, Inc., hereby disclaims all copyright interest in the
|
||||
library `Frob' (a library for tweaking knobs) written by James Random Hacker.
|
||||
|
||||
<signature of Ty Coon>, 1 April 1990
|
||||
Ty Coon, President of Vice
|
||||
|
||||
That's all there is to it!
|
||||
@@ -343,10 +343,10 @@ packages:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: matcher
|
||||
sha256: dc0b7dc7651697ea4ff3e69ef44b0407ea32c487a39fff6a4004fa585e901861
|
||||
sha256: "12956d0ad8390bbcc63ca2e1469c0619946ccb52809807067a7020d57e647aa6"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "0.12.19"
|
||||
version: "0.12.18"
|
||||
material_color_utilities:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -484,10 +484,10 @@ packages:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: test_api
|
||||
sha256: "8161c84903fd860b26bfdefb7963b3f0b68fee7adea0f59ef805ecca346f0c7a"
|
||||
sha256: "93167629bfc610f71560ab9312acdda4959de4df6fac7492c89ff0d3886f6636"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "0.7.10"
|
||||
version: "0.7.9"
|
||||
timing:
|
||||
dependency: transitive
|
||||
description:
|
||||
|
||||
@@ -22,6 +22,8 @@ class _AppInfoBuilder implements Builder {
|
||||
final buildNumber =
|
||||
plus < 0 ? 0 : int.tryParse(combined.substring(plus + 1)) ?? 0;
|
||||
|
||||
final enableFfmpeg = _readUxFlag(raw, 'enable_ffmpeg');
|
||||
|
||||
await buildStep.writeAsString(
|
||||
AssetId(pkg, 'lib/app_info.g.dart'),
|
||||
'''
|
||||
@@ -29,7 +31,35 @@ class _AppInfoBuilder implements Builder {
|
||||
import 'package:ux/ux.dart';
|
||||
|
||||
const kAppInfo = AppInfo(version: '$version', buildNumber: $buildNumber);
|
||||
|
||||
/// Mirrors the app's `ux: enable_ffmpeg` pubspec setting as a compile-time
|
||||
/// constant. Gate FFmpeg-dependent code (e.g. registerFfmpegLicense()) on
|
||||
/// this — pubspec stays the single source of truth.
|
||||
const kUxEnableFfmpeg = $enableFfmpeg;
|
||||
''',
|
||||
);
|
||||
}
|
||||
|
||||
/// Reads a boolean under the top-level `ux:` mapping, e.g. `ux: { $key: ... }`.
|
||||
/// Scans manually (no YAML dep) and ignores the indented `ux:` dependency
|
||||
/// entry by only entering the block on a non-indented `ux:` line.
|
||||
static bool _readUxFlag(String pubspec, String key) {
|
||||
var inUxBlock = false;
|
||||
var enabled = false;
|
||||
for (final rawLine in pubspec.split('\n')) {
|
||||
final hash = rawLine.indexOf('#');
|
||||
final line = hash >= 0 ? rawLine.substring(0, hash) : rawLine;
|
||||
if (line.trim().isEmpty) continue;
|
||||
final indented = line.startsWith(' ') || line.startsWith('\t');
|
||||
if (!indented) {
|
||||
inUxBlock = line.trimRight() == 'ux:' || line.startsWith('ux:');
|
||||
} else if (inUxBlock) {
|
||||
final t = line.trim();
|
||||
if (t.startsWith('$key:')) {
|
||||
enabled = t.substring(key.length + 1).trim().toLowerCase() == 'true';
|
||||
}
|
||||
}
|
||||
}
|
||||
return enabled;
|
||||
}
|
||||
}
|
||||
|
||||
64
lib/src/video/ffmpeg_license.dart
Normal file
64
lib/src/video/ffmpeg_license.dart
Normal file
@@ -0,0 +1,64 @@
|
||||
import 'package:flutter/foundation.dart';
|
||||
import 'package:flutter/services.dart' show rootBundle;
|
||||
|
||||
/// Whether the FFmpeg notice has already been added to [LicenseRegistry].
|
||||
/// Registration adds a stream provider, so guard against duplicates.
|
||||
bool _registered = false;
|
||||
|
||||
/// Registers the FFmpeg LGPL-2.1 attribution with [LicenseRegistry].
|
||||
///
|
||||
/// Call this at startup gated on the generated `kUxEnableFfmpeg` constant
|
||||
/// (from `app_info.g.dart`, which the ux build_runner builder derives from the
|
||||
/// app's `ux: enable_ffmpeg` pubspec flag) — e.g.
|
||||
/// `if (kUxEnableFfmpeg) registerFfmpegLicense();`. That keeps pubspec the
|
||||
/// single source of truth, registers eagerly (the notice shows without playing
|
||||
/// a video), and needs no `--dart-define`. Idempotent — registers at most once.
|
||||
void registerFfmpegLicense() {
|
||||
if (_registered) return;
|
||||
_registered = true;
|
||||
LicenseRegistry.addLicense(_ffmpegLicenseEntries);
|
||||
}
|
||||
|
||||
/// Attribution shown above the LGPL text. Keep in sync with
|
||||
/// `android/ffmpeg/build_ffmpeg.sh` (`FFMPEG_TAG`) and
|
||||
/// `android/ffmpeg/README.md`.
|
||||
const String _attribution = '''
|
||||
This application includes FFmpeg, used unmodified as a software video
|
||||
decoder on Android via the "ux" package (libffmpegJNI.so, loaded at runtime).
|
||||
|
||||
FFmpeg is copyright (c) the FFmpeg developers and is licensed under the
|
||||
GNU Lesser General Public License, version 2.1 (LGPL-2.1). The binary is
|
||||
dynamically loaded by the app; the LGPL boundary is preserved and no
|
||||
copyleft is imposed on the application.
|
||||
|
||||
Version: FFmpeg release/6.0, built from upstream source with the H.264
|
||||
decoder enabled only (decode-only, no encoders). It is configured WITHOUT
|
||||
--enable-gpl and WITHOUT --enable-nonfree, so the binary is LGPL-only.
|
||||
|
||||
The corresponding FFmpeg source and the build/link scripts (which document
|
||||
the exact configure flags) are available on request for at least three
|
||||
years; the application's own source code is not included in that offer.
|
||||
The shared library can be rebuilt and replaced from those sources, as
|
||||
required by section 6 of the LGPL. Contact: alex@swipelab.co
|
||||
|
||||
The full text of the LGPL v2.1 follows.''';
|
||||
|
||||
Stream<LicenseEntry> _ffmpegLicenseEntries() async* {
|
||||
String lgpl;
|
||||
try {
|
||||
lgpl = await rootBundle
|
||||
.loadString('packages/ux/assets/licenses/ffmpeg_LGPL-2.1.txt');
|
||||
} catch (error, stack) {
|
||||
// A missing asset must never break license collection; the attribution
|
||||
// paragraph below still names FFmpeg and its license.
|
||||
FlutterError.reportError(
|
||||
FlutterErrorDetails(exception: error, stack: stack),
|
||||
);
|
||||
lgpl = '';
|
||||
}
|
||||
|
||||
yield LicenseEntryWithLineBreaks(
|
||||
const <String>['FFmpeg (libavcodec, libavutil, libswresample)'],
|
||||
lgpl.isEmpty ? _attribution : '$_attribution\n\n$lgpl',
|
||||
);
|
||||
}
|
||||
@@ -130,17 +130,26 @@ class XVideoPlayerValue {
|
||||
|
||||
/// Owns one native video-player session. The surface mirrors the
|
||||
/// subset of `package:video_player`'s `VideoPlayerController` the app
|
||||
/// currently uses — only the `.file(...)` constructor, the standard
|
||||
/// playback controls, and the `value` getters compose / gallery /
|
||||
/// outgoing-media read.
|
||||
/// currently uses — the `.file(...)` / `.network(...)` constructors, the
|
||||
/// standard playback controls, and the `value` getters compose /
|
||||
/// gallery / outgoing-media read.
|
||||
///
|
||||
/// Lifecycle: construct → [initialize] → use → [dispose]. After
|
||||
/// [dispose] every other method throws [XVideoPlayerException("disposed")].
|
||||
class XVideoPlayerController extends ChangeNotifier
|
||||
implements ValueListenable<XVideoPlayerValue> {
|
||||
XVideoPlayerController.file(io.File file) : _file = file;
|
||||
/// Play a local file.
|
||||
XVideoPlayerController.file(io.File file) : _uri = 'file://${file.path}';
|
||||
|
||||
final io.File _file;
|
||||
/// Stream from a network URL. The native side hands the URI straight
|
||||
/// to Media3 (Android, `MediaItem.fromUri`) / `AVURLAsset` (Apple),
|
||||
/// both of which stream http(s) natively — no extra setup.
|
||||
XVideoPlayerController.network(Uri uri) : _uri = uri.toString();
|
||||
|
||||
/// Fully-qualified source URI handed to the native side at
|
||||
/// [initialize]. `file://...` for [XVideoPlayerController.file], the
|
||||
/// raw URL for [XVideoPlayerController.network].
|
||||
final String _uri;
|
||||
|
||||
XVideoPlayerValue _value = XVideoPlayerValue.uninitialized;
|
||||
|
||||
@@ -185,7 +194,7 @@ class XVideoPlayerController extends ChangeNotifier
|
||||
Future<void> _initInternal() async {
|
||||
try {
|
||||
final result = await XVideoPlayerBackend.instance.create(
|
||||
uri: 'file://${_file.path}',
|
||||
uri: _uri,
|
||||
);
|
||||
_handle = result.handle;
|
||||
_textureId = result.textureId;
|
||||
|
||||
@@ -16,8 +16,9 @@ abstract class XVideoPlayerBackend {
|
||||
/// Swap to inject a fake before any UI code mounts a controller.
|
||||
static XVideoPlayerBackend instance = MethodChannelXVideoPlayerBackend();
|
||||
|
||||
/// Allocate a native player instance bound to [uri] (currently always
|
||||
/// `file://...`). Returns the handle and, on Apple platforms, the
|
||||
/// Allocate a native player instance bound to [uri] (`file://...` for
|
||||
/// local playback, or an http(s) URL for network streaming). Returns
|
||||
/// the handle and, on Apple platforms, the
|
||||
/// Flutter texture id; Android returns `textureId: null` because the
|
||||
/// render path is a platform view that takes the handle as creation
|
||||
/// params.
|
||||
|
||||
@@ -14,6 +14,7 @@ export 'src/camera/camera.dart';
|
||||
export 'src/camera/camera_backend.dart' show XCameraBackend, XCameraCreateResult, XCameraEvent, XCameraDeviceOrientationChanged, XCameraSessionError, XCameraSessionInterrupted, XCameraSessionResumed, XCameraDiagnostic, XCameraPreviewSizeChanged;
|
||||
export 'src/camera/camera_channel.dart' show MethodChannelXCameraBackend;
|
||||
export 'src/camera/camera_preview.dart';
|
||||
export 'src/video/ffmpeg_license.dart' show registerFfmpegLicense;
|
||||
export 'src/video/x_video_player.dart';
|
||||
export 'src/video/x_video_player_backend.dart' show XVideoPlayerBackend, XVideoPlayerCreateResult, XVideoPlayerMetadata, XVideoPlayerEvent, XVideoPlayerStateChanged, XVideoPlayerSizeChanged, XVideoPlayerCompleted, XVideoPlayerError;
|
||||
export 'src/video/x_video_player_channel.dart' show MethodChannelXVideoPlayerBackend;
|
||||
|
||||
@@ -335,10 +335,10 @@ packages:
|
||||
dependency: "direct main"
|
||||
description:
|
||||
name: matcher
|
||||
sha256: dc0b7dc7651697ea4ff3e69ef44b0407ea32c487a39fff6a4004fa585e901861
|
||||
sha256: "12956d0ad8390bbcc63ca2e1469c0619946ccb52809807067a7020d57e647aa6"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "0.12.19"
|
||||
version: "0.12.18"
|
||||
material_color_utilities:
|
||||
dependency: transitive
|
||||
description:
|
||||
@@ -476,10 +476,10 @@ packages:
|
||||
dependency: transitive
|
||||
description:
|
||||
name: test_api
|
||||
sha256: "8161c84903fd860b26bfdefb7963b3f0b68fee7adea0f59ef805ecca346f0c7a"
|
||||
sha256: "93167629bfc610f71560ab9312acdda4959de4df6fac7492c89ff0d3886f6636"
|
||||
url: "https://pub.dev"
|
||||
source: hosted
|
||||
version: "0.7.10"
|
||||
version: "0.7.9"
|
||||
timing:
|
||||
dependency: transitive
|
||||
description:
|
||||
|
||||
@@ -20,7 +20,7 @@ dependencies:
|
||||
flutter:
|
||||
sdk: flutter
|
||||
matcher: ^0.12.16
|
||||
build: ^2.4.0
|
||||
build: '>=2.4.0 <5.0.0'
|
||||
clock: ^1.1.1
|
||||
ffi: ^2.1.0
|
||||
|
||||
@@ -39,3 +39,7 @@ flutter:
|
||||
pluginClass: XPlugin
|
||||
macos:
|
||||
pluginClass: XPlugin
|
||||
assets:
|
||||
# LGPL-2.1 text for the bundled FFmpeg software H.264 decoder
|
||||
# (libffmpegJNI.so, Android only). Surfaced via registerFfmpegLicense().
|
||||
- assets/licenses/ffmpeg_LGPL-2.1.txt
|
||||
|
||||
Reference in New Issue
Block a user