CI: Initial workflow for aarch64-linux-android

.github/workflows/build-and-test-aarch64-android.yml

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+name: build and test on android
+on:
+  push:
+    branches:
+      - 'main'
+  pull_request:
+
+jobs:
+  test-in-android-emulator:
+    timeout-minutes: 60
+    runs-on: ubuntu-latest
+    steps:
+      - name: add NDK toolchain to path
+        run: |
+            echo "$ANDROID_NDK_LATEST_HOME/toolchains/llvm/prebuilt/linux-x86_64/bin" >> $GITHUB_PATH
+      - name: git checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+      - name: cache rust dependencies
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/
+          key: aarch64-android-cargo-and-target-${{ hashFiles('**/Cargo.lock') }}
+      - name: cargo build for aarch64-linux-android
+        run:  |
+            rustup target add aarch64-linux-android
+            cargo build --target aarch64-linux-android --release
+        env:
+          AR: llvm-ar
+          CC: aarch64-linux-android26-clang
+          RUSTFLAGS: "-C linker=aarch64-linux-android26-clang -L $ANDROID_NDK_LATEST_HOME/toolchains/llvm/prebuilt/linux-x86_64/lib/clang/17/lib/linux/aarch64 -L $ANDROID_NDK_LATEST_HOME/toolchains/llvm/prebuilt/linux-x86_64/sysroot/usr/lib/aarch64-linux-android/26"
+

bench_android.sh

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+#!/bin/bash
+
+# Enable exit on error
+set -e
+
+for i in {1..10}
+do
+    echo "testing dav1d"
+    adb shell LD_LIBRARY_PATH=/data/local/ time /data/local/dav1d_c_impl -q -i /data/local/Chimera-AV1-8bit-1920x1080-6736kbps.ivf -o /dev/null
+    echo "testing rav1d"
+    adb shell LD_LIBRARY_PATH=/data/local/ time /data/local/dav1d -q -i /data/local/Chimera-AV1-8bit-1920x1080-6736kbps.ivf -o /dev/null
+done

bench_results.py

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+import re
+
+def parse_time(time_str):
+    return float(time_str)
+
+def calculate_average(times):
+    return sum(times) / len(times)
+
+def main():
+    rav1d_times = []
+    dav1d_times = []
+    current_decoder = None
+
+    data = '''
+testing dav1d
+
+real	47.214
+user	270.204236
+sys	6.683360
+testing rav1d
+
+real	58.240
+user	357.863738
+sys	9.970720
+testing dav1d
+
+real	59.890
+user	379.184440
+sys	8.899621
+testing rav1d
+
+real	70.354
+user	447.472465
+sys	11.418514
+testing dav1d
+
+real	61.442
+user	392.380113
+sys	9.166131
+testing rav1d
+
+real	69.864
+user	443.213629
+sys	11.830889
+testing dav1d
+
+real	61.312
+user	392.964597
+sys	9.255956
+testing rav1d
+
+real	69.378
+user	442.190257
+sys	11.543815
+testing dav1d
+
+real	61.320
+user	393.89938
+sys	9.47970
+testing rav1d
+
+real	69.944
+user	443.964194
+sys	11.637191
+testing dav1d
+
+real	61.523
+user	392.879454
+sys	9.100157
+testing rav1d
+
+real	69.657
+user	443.42958
+sys	11.803730
+testing dav1d
+
+real	61.359
+user	393.30041
+sys	9.258827
+testing rav1d
+
+real	69.262
+user	441.865210
+sys	11.250262
+testing dav1d
+
+real	61.380
+user	394.61714
+sys	8.902229
+testing rav1d
+
+real	69.670
+user	443.120249
+sys	11.486521
+testing dav1d
+
+real	61.533
+user	393.521276
+sys	9.432644
+testing rav1d
+
+real	69.561
+user	444.259118
+sys	11.996127
+testing dav1d
+
+real	61.334
+user	393.363427
+sys	9.20679
+testing rav1d
+
+real	69.599
+user	445.186791
+sys	11.423909
+
+
+'''
+
+    for line in data.strip().split('\n'):
+        if line.startswith('#'):
+            continue
+        elif line.startswith('real'):
+            time = parse_time(line.split()[1])
+            if current_decoder == 'rav1d':
+                rav1d_times.append(time)
+            elif current_decoder == 'dav1d':
+                dav1d_times.append(time)
+        elif line.startswith('testing'):
+            current_decoder = line.split()[1]
+
+    avg_rav1d = calculate_average(rav1d_times)
+    avg_dav1d = calculate_average(dav1d_times)
+
+    percentage_difference = ((avg_rav1d - avg_dav1d) / avg_dav1d) * 100
+
+    print(f"Average time for rav1d: {avg_rav1d:.3f} seconds")
+    print(f"Average time for dav1d: {avg_dav1d:.3f} seconds")
+    print(f"rav1d is {percentage_difference:.2f}% slower than dav1d")
+
+if __name__ == "__main__":
+    main()