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feat: direct audio proxy file writing #25

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merged 1 commit into from
Jan 26, 2024
Merged

feat: direct audio proxy file writing #25

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33 changes: 16 additions & 17 deletions src/Aurio.FFmpeg/FFmpegSourceStream.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@
using System.IO;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using Aurio.Streams;

namespace Aurio.FFmpeg
Expand Down Expand Up @@ -301,17 +302,20 @@ public static FileInfo CreateWaveProxy(FileInfo fileInfo, FileInfo proxyFileInfo
}

var reader = new FFmpegReader(fileInfo, FFmpeg.Type.Audio);

var writer = new MemoryWriterStream(
new AudioProperties(
reader.AudioOutputConfig.format.channels,
reader.AudioOutputConfig.format.sample_rate,
reader.AudioOutputConfig.format.sample_size * 8,
reader.AudioOutputConfig.format.sample_size == 4
? AudioFormat.IEEE
: AudioFormat.LPCM
)
var properties = new AudioProperties(
reader.AudioOutputConfig.format.channels,
reader.AudioOutputConfig.format.sample_rate,
reader.AudioOutputConfig.format.sample_size * 8,
reader.AudioOutputConfig.format.sample_size == 4
? AudioFormat.IEEE
: AudioFormat.LPCM
);
var writer = new BlockingFixedLengthFifoStream(properties, 1024 * 1024 * 16);

var writerTask = Task.Run(() =>
{
AudioStreamFactory.WriteToFile(writer, proxyFileInfo.FullName);
});

int output_buffer_size = reader.AudioOutputConfig.frame_size * writer.SampleBlockSize;
byte[] output_buffer = new byte[output_buffer_size];
Expand All @@ -334,13 +338,8 @@ out Type type
writer.Write(output_buffer, 0, bytesRead);
}

reader.Dispose();

writer.Position = 0;

AudioStreamFactory.WriteToFile(writer, proxyFileInfo.FullName);

writer.Close();
writer.SignalEndOfInput();
writerTask.Wait();

return proxyFileInfo;
}
Expand Down
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