Import minamp 1.0 source

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

tools/setup_toolchain.sh

@@ -0,0 +1,62 @@
+#!/bin/bash
+# Fetches/builds everything build.sh needs into $TOOLS (default ./toolchain), with only
+# Java 17+, git, curl, python3 (+ cryptography for make_roots.py) and npm's registry.
+set -euo pipefail
+cd "$(dirname "$0")/.."
+PROJ=$PWD
+T=${TOOLS:-$PWD/toolchain}
+mkdir -p "$T" && cd "$T"
+
+echo "== aapt2 (prebuilt, from the aaptjs3 npm package)"
+if [ ! -x aapt2 ]; then
+  mkdir -p dl && curl -sSL -o dl/aapt.tgz "$(curl -sS https://registry.npmjs.org/aaptjs3/latest | python3 -c 'import json,sys;print(json.load(sys.stdin)["dist"]["tarball"])')"
+  tar xzf dl/aapt.tgz -C dl && cp dl/package/bin/x64/linux/aapt2 . && chmod +x aapt2
+fi
+
+echo "== android-8 platform jar"
+if [ ! -f platforms/android-8/android.jar ]; then
+  git clone --depth 1 --filter=blob:none --sparse https://github.com/Sable/android-platforms platforms
+  (cd platforms && git sparse-checkout set android-8)
+fi
+
+echo "== dx (built from AOSP source)"
+if [ ! -f dx.jar ]; then
+  git clone --depth 1 --branch android10-release --filter=blob:none --sparse https://github.com/aosp-mirror/platform_dalvik dalvik
+  (cd dalvik && git sparse-checkout set dx/src)
+  mkdir -p dxbuild && find dalvik/dx/src -name '*.java' > dxsrc.txt
+  javac -nowarn -encoding UTF-8 -d dxbuild @dxsrc.txt
+  jar cfe dx.jar com.android.dx.command.Main -C dxbuild .
+fi
+
+echo "== Bouncy Castle sources, renamed to com.minamp.bc"
+if [ ! -d bcsrc ]; then
+  git clone --depth 1 --filter=blob:none --sparse https://github.com/bcgit/bc-java bc
+  (cd bc && git sparse-checkout set core/src/main/java tls/src/main/java util/src/main/java)
+  mkdir -p bcsrc/com/minamp
+  cp -r bc/core/src/main/java/org/bouncycastle bcsrc/com/minamp/bc
+  cp -r --update=none bc/tls/src/main/java/org/bouncycastle/* bcsrc/com/minamp/bc/
+  cp -r --update=none bc/util/src/main/java/org/bouncycastle/* bcsrc/com/minamp/bc/
+  grep -rl 'org\.bouncycastle' bcsrc | xargs sed -i 's/org\.bouncycastle/com.minamp.bc/g'
+  # Android 2.2 has no Long.compare / compareUnsigned / divideUnsigned / parseUnsignedLong
+  python3 - bcsrc/com/minamp/bc/util/Longs.java <<'PY'
+import sys
+p = sys.argv[1]; s = open(p).read()
+s = s.replace("return Long.compare(x, y);", "return x < y ? -1 : (x == y ? 0 : 1);")
+s = s.replace("return Long.compareUnsigned(x, y);", "return compare(x + Long.MIN_VALUE, y + Long.MIN_VALUE);")
+s = s.replace("return Long.divideUnsigned(x, y);", """if (y < 0) { return compareUnsigned(x, y) < 0 ? 0L : 1L; }
+        if (x >= 0) { return x / y; }
+        long q = ((x >>> 1) / y) << 1;
+        long r = x - q * y;
+        return q + (compareUnsigned(r, y) >= 0 ? 1 : 0);""")
+s = s.replace("return Long.parseUnsignedLong(s);", "return new java.math.BigInteger(s).longValue();")
+open(p, "w").write(s)
+PY
+fi
+
+echo "== signing key"
+if [ ! -f minamp.keystore ]; then
+  if [ -f "$PROJ/signing/minamp.keystore" ]; then cp "$PROJ/signing/minamp.keystore" .; else
+  keytool -genkeypair -keystore minamp.keystore -storepass minamp123 -keypass minamp123 -alias minamp \
+    -keyalg RSA -keysize 2048 -sigalg SHA1withRSA -validity 20000 -dname "CN=Minamp, O=Minamp"; fi
+fi
+echo "Toolchain ready in $T — build with: TOOLS=$T ./build.sh"