Add Flutter text to speech demo (#1087)

scripts/flutter/build-android-tts.sh.in

@@ -0,0 +1,97 @@
+#!/usr/bin/env bash
+set -ex
+
+log() {
+  # This function is from espnet
+  local fname=${BASH_SOURCE[1]##*/}
+  echo -e "$(date '+%Y-%m-%d %H:%M:%S') (${fname}:${BASH_LINENO[0]}:${FUNCNAME[1]}) $*"
+}
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+SHERPA_ONNX_DIR=$(cd $SCRIPT_DIR/../.. && pwd)
+log "SCRIPT_DIR: $SCRIPT_DIR"
+log "SHERPA_ONNX_DIR: $SHERPA_ONNX_DIR"
+
+SHERPA_ONNX_VERSION=$(grep "SHERPA_ONNX_VERSION" $SHERPA_ONNX_DIR/CMakeLists.txt  | cut -d " " -f 2  | cut -d '"' -f 2)
+log "SHERPA_ONNX_VERSION: $SHERPA_ONNX_VERSION"
+
+{% for tts_model in tts_model_list %}
+pushd $SHERPA_ONNX_DIR/flutter-examples/tts/
+
+git checkout .
+
+rm -rf assets
+mkdir assets
+pushd assets
+
+model_dir={{ tts_model.model_dir }}
+model_name={{ tts_model.model_name }}
+lang={{ tts_model.lang }}
+
+curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/tts-models/$model_dir.tar.bz2
+tar xf $model_dir.tar.bz2
+rm $model_dir.tar.bz2
+
+ls -lh
+ls -lh *
+
+popd # assets
+# Now we are at the project root directory
+
+./generate-asset-list.py
+
+pushd lib
+
+sed -i.bak "s|modelDir = ''|modelDir = \"$model_dir\"|" ./model.dart
+sed -i.bak s/"modelName = ''"/"modelName = \"$model_name\""/ ./model.dart
+
+{% if tts_model.rule_fsts %}
+  rule_fsts={{ tts_model.rule_fsts }}
+  sed -i.bak "s|ruleFsts = ''|ruleFsts = \"$rule_fsts\"|" ./model.dart
+{% endif %}
+
+{% if tts_model.rule_fars %}
+  rule_fars={{ tts_model.rule_fars }}
+  sed -i.bak "s|ruleFars = ''|ruleFars = \"$rule_fars\"|" ./model.dart
+{% endif %}
+
+{% if tts_model.dict_dir %}
+  dict_dir={{ tts_model.dict_dir }}
+  sed -i.bak "s|dictDir = ''|dictDir = \"$dict_dir\"|" ./model.dart
+{% endif %}
+
+{% if tts_model.data_dir %}
+  data_dir={{ tts_model.data_dir }}
+  sed -i.bak "s|dataDir = ''|dataDir = \"$data_dir\"|" ./model.dart
+{% elif not tts_model.is_char %}
+  sed -i.bak "s|lexicon = ''|lexicon = \"lexicon.txt\"|" ./model.dart
+{% endif %}
+
+git status
+
+git diff .
+
+popd #lib
+
+flutter pub get
+
+flutter build apk --split-per-abi --release
+
+pushd build/app/outputs/flutter-apk
+ls -lh
+
+for arch in armeabi-v7a arm64-v8a x86_64; do
+  src=app-$arch-release.apk
+  dst=$SHERPA_ONNX_DIR/sherpa-onnx-$SHERPA_ONNX_VERSION-$arch-$lang-tts-$model_dir.apk
+  mv $src $dst
+done
+
+pushd $SHERPA_ONNX_DIR
+ls -lh *.apk
+popd
+
+popd
+
+popd
+
+{% endfor %}