Add Pascal API for reading wave files (#1243)

+name: pascal
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - '.github/workflows/pascal.yaml'
+      - 'CMakeLists.txt'
+      - 'cmake/**'
+      - 'pascal-api-examples/**'
+      - 'sherpa-onnx/csrc/*'
+      - 'sherpa-onnx/c-api/*'
+      - 'sherpa-onnx/pascal-api/*'
+  pull_request:
+    branches:
+      - master
+    paths:
+      - '.github/workflows/pascal.yaml'
+      - 'CMakeLists.txt'
+      - 'cmake/**'
+      - 'pascal-api-examples/**'
+      - 'sherpa-onnx/csrc/*'
+      - 'sherpa-onnx/c-api/*'
+      - 'sherpa-onnx/pascal-api/*'
+
+  workflow_dispatch:
+
+concurrency:
+  group: pascal-${{ github.ref }}
+  cancel-in-progress: true
+
+permissions:
+  contents: read
+
+jobs:
+  pascal:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, macos-13]
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: ccache
+        uses: hendrikmuhs/ccache-action@v1.2
+        with:
+          key: ${{ matrix.os }}
+
+      - name: Install Free pascal compiler (ubuntu)
+        if: matrix.os == 'ubuntu-latest'
+        shell: bash
+        run: |
+          sudo apt-get update
+          sudo apt-get install -q -y fpc
+
+      - name: Install Free pascal compiler (macos)
+        if: matrix.os == 'macos-latest' || matrix.os == 'macos-13'
+        shell: bash
+        run: |
+          brew install fpc
+          # brew install --cask lazarus
+
+      - name: FPC info
+        shell: bash
+        run: |
+          which fpc
+          fpc -i
+
+      - name: OS info
+        shell: bash
+        run: |
+          uname -a
+
+      - name: Configure CMake
+        shell: bash
+        run: |
+          export CMAKE_CXX_COMPILER_LAUNCHER=ccache
+          export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
+          cmake --version
+
+          mkdir build
+          cd build
+
+          cmake \
+            -D BUILD_SHARED_LIBS=ON \
+            -D SHERPA_ONNX_ENABLE_BINARY=OFF \
+            -D CMAKE_BUILD_TYPE=Release \
+            ..
+
+      - name: Build sherpa-onnx
+        shell: bash
+        run: |
+          export PATH="/usr/lib/ccache:/usr/local/opt/ccache/libexec:$PATH"
+
+          cd build
+          make -j2 sherpa-onnx-c-api
+
+      - name:  Run Pascal test
+        shell: bash
+        run: |
+          cd ./pascal-api-examples
+
+          echo "----read-wav test-----"
+          pushd read-wav
+          ./run.sh
+          ls -lh
+          popd

@@ -114,3 +114,5 @@ lib*.a
 sherpa-onnx-sense-voice-zh-en-ja-ko-yue-2024-07-17
 *.bak
 vits-melo-tts-zh_en
+*.o
+*.ppu

@@ -29,9 +29,9 @@
 |--------|-------|-----------|-------|---------|---------------|
 |   ✔️    | ✔️     | ✔️         | ✔️     |  ✔️      |      ✔️        |
 
-| 7. Kotlin | 8. Swift | 9. Go | 10. Dart | 11. Rust |
-|-----------|----------|-------|----------|----------|
-| ✔️         |  ✔️       | ✔️     |  ✔️       |  ✔️       |
+| 7. Kotlin | 8. Swift | 9. Go | 10. Dart | 11. Rust | 12. Pascal |
+|-----------|----------|-------|----------|----------|------------|
+| ✔️         |  ✔️       | ✔️     |  ✔️       |  ✔️       |    ✔️       |
 
 For Rust support, please see https://github.com/thewh1teagle/sherpa-rs
 

+main

+{ Copyright (c)  2024  Xiaomi Corporation }
+program main;
+
+{$mode objfpc}
+
+uses
+  sherpa_onnx;
+
+var
+  Wave: TSherpaOnnxWave;
+  S: Single;
+  I: Integer;
+begin
+  Wave := SherpaOnnxReadWave('./lei-jun-test.wav');
+  WriteLn('info ', Wave.SampleRate, ' ', Length(Wave.Samples));
+  S := 0;
+  for i := Low(Wave.Samples) to High(Wave.Samples) do
+    S += Wave.Samples[i];
+
+  WriteLn('sum is ', S);
+end.

+#!/usr/bin/env bash
+
+set -ex
+
+SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
+SHERPA_ONNX_DIR=$(cd $SCRIPT_DIR/../.. && pwd)
+
+echo "SHERPA_ONNX_DIR: $SHERPA_ONNX_DIR"
+
+if [[ ! -f ../../build/lib/libsherpa-onnx-c-api.dylib  && ! -f ../../build/lib/libsherpa-onnx-c-api.so ]]; then
+  mkdir -p ../../build
+  pushd ../../build
+  cmake \
+    -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+    -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+    -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+    -DBUILD_SHARED_LIBS=ON \
+    -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+    ..
+
+  make -j4 sherpa-onnx-c-api
+  ls -lh lib
+  popd
+fi
+
+if [ ! -f ./lei-jun-test.wav ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/asr-models/lei-jun-test.wav
+fi
+
+fpc \
+  -Fu$SHERPA_ONNX_DIR/sherpa-onnx/pascal-api \
+  -Fl$SHERPA_ONNX_DIR/build/lib \
+  ./main.pas
+
+export LD_LIBRARY_PATH=$SHERPA_ONNX_DIR/build/lib:$LD_LIBRARY_PATH
+export DYLD_LIBRARY_PATH=$SHERPA_ONNX_DIR/build/lib:$DYLD_LIBRARY_PATH
+
+./main

+# Introduction
+
+This directory contains APIs for [Object Pascal](https://en.wikipedia.org/wiki/Object_Pascal).
+
+Please see
+https://github.com/k2-fsa/sherpa-onnx/tree/master/pascal-api-examples
+for usages.

+{ Copyright (c)  2024  Xiaomi Corporation }
+
+unit sherpa_onnx;
+
+{$mode objfpc}
+
+interface
+
+type
+  TSherpaOnnxWave = record
+    Samples: array of Single; { normalized to the range [-1, 1] }
+    SampleRate: Integer;
+  end;
+
+{ It supports reading a single channel wave with 16-bit encoded samples.
+  Samples are normalized to the range [-1, 1].
+}
+function SherpaOnnxReadWave(Filename: string): TSherpaOnnxWave;
+
+implementation
+
+uses
+  ctypes;
+
+const
+  {See https://www.freepascal.org/docs-html/prog/progap7.html}
+
+  {$IFDEF WINDOWS}
+    SherpaOnnxLibName = 'sherpa-onnx-c-api.dll';
+  {$ENDIF}
+
+  {$IFDEF DARWIN}
+    SherpaOnnxLibName = 'sherpa-onnx-c-api';
+    {$linklib sherpa-onnx-c-api}
+  {$ENDIF}
+
+  {$IFDEF LINUX}
+    SherpaOnnxLibName = 'libsherpa-onnx-c-api.so';
+  {$ENDIF}
+
+type
+  SherpaOnnxWave = record
+    Samples: pcfloat;
+    SampleRate: cint32;
+    NumSamples: cint32;
+  end;
+
+  PSherpaOnnxWave = ^SherpaOnnxWave;
+
+function SherpaOnnxReadWaveWrapper(Filename: PAnsiChar): PSherpaOnnxWave; cdecl;
+  external SherpaOnnxLibName name 'SherpaOnnxReadWave';
+
+procedure SherpaOnnxFreeWaveWrapper(P: PSherpaOnnxWave); cdecl;
+  external SherpaOnnxLibName name 'SherpaOnnxFreeWave';
+
+function SherpaOnnxReadWave(Filename: string): TSherpaOnnxWave;
+var
+  AnsiFilename: AnsiString;
+  PFilename: PAnsiChar;
+  PWave: PSherpaOnnxWave;
+  I: Integer;
+begin
+  AnsiFilename := Filename;
+  PFilename := PAnsiChar(AnsiFilename);
+  PWave := SherpaOnnxReadWaveWrapper(PFilename);
+
+  SetLength(Result.Samples, PWave^.NumSamples);
+
+  Result.SampleRate := PWave^.SampleRate;
+
+  for I := Low(Result.Samples) to High(Result.Samples) do
+    Result.Samples[i] := PWave^.Samples[i];
+
+  SherpaOnnxFreeWaveWrapper(PWave);
+end;
+
+end.