Add RTX 50 Blackwell image support

cli/setup_blackwell_venv

@@ -0,0 +1,112 @@
+#!/bin/bash
+set -euo pipefail
+
+PROGDIR="$(dirname "$(realpath "$0")")"
+ROOTDIR="$(dirname "${PROGDIR}")"
+
+KNOWN_ARGS=( data-dir force python )
+source "${PROGDIR}/shell.functions"
+
+if [ ${#UNKNOWN_ARGS[@]} -gt 0 ] ; then
+    echo "Unknown argument(s): ${UNKNOWN_ARGS[*]}" >&2
+    HELP=true
+fi
+
+if [ "${HELP}" == "true" ] ; then
+    cat <<EOF >&2
+Usage: setup_blackwell_venv [ --data-dir=/data ] [ --force ] [ --python=python3.13 ]
+
+Creates /data/.venv-blackwell for RTX 50 / Blackwell TensorFlow training.
+Sample generation and augmentation continue to use /data/.venv.
+
+Environment overrides:
+MWW_BLACKWELL_TF_WHEEL_URL: TensorFlow Blackwell wheel URL.
+
+EOF
+    exit 1
+fi
+
+[ -n "${DATA_DIR}" ] && DATA_DIR="$(realpath "${DATA_DIR}")"
+[ -d "${DATA_DIR}" ] || {
+    echo "Data directory '${DATA_DIR}' doesn't exist." >&2
+    exit 1
+}
+
+PYTHON="${PYTHON:-python3.13}"
+VENV="${DATA_DIR}/.venv-blackwell"
+MARKER="${VENV}/.mww-blackwell-venv"
+TF_WHEEL_URL="${MWW_BLACKWELL_TF_WHEEL_URL:-https://github.com/chivitiH/tensorflow-blackwell-python313/releases/download/v2.22.0-selfbuilt/tensorflow-2.22.0.dev0+selfbuilt-cp313-cp313-linux_x86_64.whl}"
+
+if ! command -v "${PYTHON}" >/dev/null 2>&1 ; then
+    echo "Python 3.13 is required for the Blackwell TensorFlow wheel. Missing: ${PYTHON}" >&2
+    exit 1
+fi
+
+if [ "${FORCE:-false}" != "true" ] && [ -x "${VENV}/bin/python" ] && [ -f "${MARKER}" ] ; then
+    echo "   Blackwell TensorFlow venv found (skipping setup_blackwell_venv)"
+    exit 0
+fi
+
+echo "===== Setting up Blackwell TensorFlow environment ${VENV} ====="
+rm -rf "${VENV}" || :
+"${PYTHON}" -m venv --upgrade-deps "${VENV}"
+source "${VENV}/bin/activate"
+
+export PIP_PROGRESS_BAR=off
+export PIP_NO_COLOR=1
+export PIP_QUIET=0
+
+pip_install() {
+    if $VERBOSE ; then
+        pip install "$@" || return 1
+    else
+        { pip install "$@" || return 1 ; } | stdbuf -i0 -o0 tr -d '[:print:]' | stdbuf -i0 -o0 tr '\n' '.'
+    fi
+    echo
+}
+
+echo "   ===== Installing Blackwell TensorFlow wheel ====="
+pip_install --upgrade pip setuptools wheel
+pip_install "${TF_WHEEL_URL}"
+
+echo "   ===== Installing microWakeWord training dependencies ====="
+pip_install \
+    audiomentations \
+    audio_metadata \
+    datasets \
+    mmap_ninja \
+    pymicro-features \
+    pyyaml \
+    webrtcvad-wheels \
+    ai-edge-litert \
+    numpy-minmax \
+    numpy-rms \
+    absl-py \
+    "numpy==2.3.5"
+
+echo "   ===== Checking microwakeword ====="
+MWW="${DATA_DIR}/tools/microWakeWord"
+if [ ! -d "${MWW}" ] || [ -n "$(git -C "${MWW}" status --porcelain 2>/dev/null || true)" ] ; then
+    rm -rf "${MWW}" || :
+    mkdir -p "${DATA_DIR}/tools"
+    echo "   Cloning micro-wake-word to ${DATA_DIR}/tools"
+    git clone https://github.com/TaterTotterson/micro-wake-word "${MWW}" &>/dev/null
+fi
+echo "   Installing microwakeword into Blackwell venv"
+pip_install --no-deps -e "${MWW}"
+
+echo "   ===== Testing Blackwell TensorFlow environment ====="
+"${VENV}/bin/python" - <<'PY'
+import tensorflow as tf
+from ai_edge_litert.interpreter import Interpreter
+from microwakeword.data import FeatureHandler
+from microwakeword.inference import Model
+
+print("TensorFlow:", tf.__version__)
+print("CUDA build:", tf.test.is_built_with_cuda())
+print("GPU:", tf.config.list_physical_devices("GPU"))
+print("microWakeWord Blackwell imports available")
+PY
+
+touch "${MARKER}"
+echo "Blackwell TensorFlow environment ready: ${VENV}"

cli/wake_word_sample_trainer

@@ -84,6 +84,21 @@ if [ "${IS_BLACKWELL}" = "true" ]; then
   echo "ℹ️  Using GPU compatibility retries; CPU fallback is ${ALLOW_CPU_FALLBACK} (override with MWW_ALLOW_CPU_FALLBACK=true|false)."
 fi
 
+BLACKWELL_TF_MODE="${MWW_BLACKWELL_TF:-auto}"
+BLACKWELL_TF_REQUIRED="false"
+BLACKWELL_TF_ACTIVE="false"
+case "${BLACKWELL_TF_MODE,,}" in
+  1|true|yes|on|required)
+    BLACKWELL_TF_REQUIRED="true"
+    ;;
+  0|false|no|off|disabled)
+    BLACKWELL_TF_MODE="disabled"
+    ;;
+  *)
+    BLACKWELL_TF_MODE="auto"
+    ;;
+esac
+
 # Enable driver-side PTX JIT fallback when ptxas/nvlink are unavailable.
 if [ -z "${XLA_FLAGS:-}" ]; then
   export XLA_FLAGS="--xla_gpu_unsafe_fallback_to_driver_on_ptxas_not_found"
@@ -238,6 +253,32 @@ fi
 echo "   Wrote training_parameters.yaml"
 rm -rf "${WORK_DIR}/trained_models/wakeword"
 
+if [ "${IS_BLACKWELL}" = "true" ] && [ "${BLACKWELL_TF_MODE}" != "disabled" ]; then
+  BLACKWELL_SETUP="${PROGDIR}/setup_blackwell_venv"
+  BLACKWELL_PYTHON="${DATA_DIR}/.venv-blackwell/bin/python"
+
+  if [ -x "${BLACKWELL_SETUP}" ] && command -v python3.13 >/dev/null 2>&1; then
+    echo "↪️  Preparing Blackwell-native TensorFlow training environment."
+    if "${BLACKWELL_SETUP}" --data-dir="${DATA_DIR}"; then
+      PYTHON_BIN="${BLACKWELL_PYTHON}"
+      BLACKWELL_TF_ACTIVE="true"
+      echo "✅ Blackwell TensorFlow training enabled: ${PYTHON_BIN}"
+    else
+      if [ "${BLACKWELL_TF_REQUIRED}" = "true" ]; then
+        echo "❌ Blackwell TensorFlow setup failed and MWW_BLACKWELL_TF is required." >&2
+        exit 1
+      fi
+      echo "⚠️  Blackwell TensorFlow setup failed; continuing with compatibility retries."
+    fi
+  else
+    if [ "${BLACKWELL_TF_REQUIRED}" = "true" ]; then
+      echo "❌ Blackwell TensorFlow was required, but python3.13/setup_blackwell_venv is unavailable." >&2
+      exit 1
+    fi
+    echo "ℹ️  Blackwell TensorFlow image support not available; continuing with compatibility retries."
+  fi
+fi
+
 wake_word_filename="$(
   echo "${WAKE_WORD}" \
     | tr '[:upper:]' '[:lower:]' \