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C# quickstart: bump SDK version, fix example 3 #229

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C# quickstart: bump SDK version, fix example 3 #229

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1bb67ae
fix abrupt end before Goodbye World
ivaaan Nov 12, 2025
8d2b6b8
fix example 3, rm legacy code
ivaaan Nov 13, 2025
4bfa894
rm comments
ivaaan Nov 13, 2025
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39 changes: 16 additions & 23 deletions tts/tts-dotnet-quickstart/Program.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,6 @@ class Program

private static string? _apiKey;
private static HumeClient? _client;
private static string? _outputDir;

static async Task RunExamplesAsync()
{
Expand All @@ -39,12 +38,6 @@ static async Task RunExamplesAsync()

_client = new HumeClient(_apiKey);

// Create an output directory in the temporary folder
_outputDir = Path.Combine(Path.GetTempPath(), "hume-audio");
Directory.CreateDirectory(_outputDir);

Console.WriteLine($"Results will be written to {_outputDir}");

await Example1Async();
await Example2Async();
await Example3Async();
Expand Down Expand Up @@ -199,7 +192,7 @@ static async Task Example3Async()
{
Console.WriteLine("Example 3: Bidirectional streaming...");

using var streamingTtsClient = new StreamingTtsClient(_apiKey!);
using var streamingTtsClient = new StreamingTtsClient(_apiKey!, enableDebugLogging: true);
await streamingTtsClient.ConnectAsync();

// Use buffered mode for bidirectional streaming to handle irregular chunk arrival timing
Expand Down Expand Up @@ -242,7 +235,6 @@ static async Task Example3Async()

/// <summary>
/// Helper method to stream audio chunks from a TTS response to an audio player.
/// Handles SDK compatibility by working with both TtsOutput and OneOf types.
/// </summary>
private static async Task StreamAudioToPlayerAsync<T>(
IAsyncEnumerable<T> snippetStream,
Expand Down Expand Up @@ -313,10 +305,12 @@ public Task StartStreamingAsync()
{
try
{
int chunkCount = 0;
foreach (var audioBytes in _audioBuffer.GetConsumingEnumerable(_bufferCts.Token))
{
if (_audioProcess?.StandardInput?.BaseStream != null)
if (_audioProcess?.StandardInput?.BaseStream != null && !_audioProcess.HasExited)
{
chunkCount++;
await _audioProcess.StandardInput.BaseStream.WriteAsync(audioBytes, _bufferCts.Token);
await _audioProcess.StandardInput.BaseStream.FlushAsync(_bufferCts.Token);
}
Expand All @@ -335,18 +329,24 @@ public Task StartStreamingAsync()

public Task SendAudioAsync(byte[] audioBytes)
{
if (!_isStreaming) return Task.CompletedTask;
if (!_isStreaming)
{
return Task.CompletedTask;
}

if (audioBytes.Length == 0)
{
return Task.CompletedTask;
}

try
{
if (_useBuffering && _audioBuffer != null)
{
// Buffered mode: add to queue for background task to process
_audioBuffer.Add(audioBytes);
}
else if (_audioProcess?.HasExited == false)
{
// Direct mode: write immediately to ffplay
_audioProcess?.StandardInput.BaseStream.Write(audioBytes, 0, audioBytes.Length);
_audioProcess?.StandardInput.BaseStream.Flush();
}
Expand All @@ -373,9 +373,11 @@ public async Task StopStreamingAsync()
{
await _bufferTask;
}

await Task.Delay(TimeSpan.FromSeconds(5));
}

// Close ffplay process
// Close ffplay process input stream - ffplay will finish playing all buffered audio then exit
if (_audioProcess != null && !_audioProcess.HasExited)
{
_audioProcess.StandardInput.Close();
Expand Down Expand Up @@ -458,13 +460,4 @@ private static StreamingAudioPlayer StartAudioPlayer()
return new StreamingAudioPlayer();
}

private static async Task WriteResultToFile(string base64EncodedAudio, string filename, string outputDir)
{
var filePath = Path.Combine(outputDir, $"{filename}.wav");
// Decode the base64-encoded audio data
var audioData = Convert.FromBase64String(base64EncodedAudio);
await File.WriteAllBytesAsync(filePath, audioData);
Console.WriteLine($"Wrote {filePath}");
}

}
2 changes: 1 addition & 1 deletion tts/tts-dotnet-quickstart/tts-csharp-quickstart.csproj
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Original file line number Diff line number Diff line change
Expand Up @@ -10,7 +10,7 @@
</PropertyGroup>

<ItemGroup>
<PackageReference Include="Hume" Version="0.2.1" />
<PackageReference Include="Hume" Version="0.2.3" />
<PackageReference Include="DotNetEnv" Version="3.1.1" />
<PackageReference Include="OneOf" Version="3.0.271" />
<PackageReference Include="OneOf.Extended" Version="3.0.271" />
Expand Down