moving ogg vorbis production code to a separate class
This commit is contained in:
Hamid Reza Mohammadi
parent
94ea1ba33b
commit
00e83f6b5f
@ -4259,6 +4259,7 @@
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</summary>
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<param name="context"></param>
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<param name="configuration"></param>
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<param name="backgroundTaskQueue"></param>
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</member>
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<member name="T:RMuseum.Services.Implementation.BLTileMixer">
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<summary>
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@ -4306,6 +4307,11 @@
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equaivalnet for persian characters
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</summary>
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</member>
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<member name="T:RMuseum.Services.Implementation.OggVorbisConvertor">
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<summary>
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ogg vorbis convertor
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</summary>
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</member>
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<member name="T:RMuseum.Services.Implementation.PictureFileService">
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<summary>
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manipulating picture files
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@ -351,7 +351,7 @@ namespace RMuseum.Services.Implementation
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{
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byte[] samples = new byte[mp3FileReader.Length];
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await mp3FileReader.ReadAsync(samples, 0, (int)mp3FileReader.Length);
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var oggBytes = ConvertRawPCMFile(mp3FileReader.Mp3WaveFormat.SampleRate, mp3FileReader.Mp3WaveFormat.Channels, samples, PCMSample.EightBit, mp3FileReader.Mp3WaveFormat.SampleRate, mp3FileReader.Mp3WaveFormat.Channels);
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var oggBytes = OggVorbisConvertor.ConvertRawPCMFile(mp3FileReader.Mp3WaveFormat.SampleRate, mp3FileReader.Mp3WaveFormat.Channels, samples, PCMSample.EightBit, mp3FileReader.Mp3WaveFormat.SampleRate, mp3FileReader.Mp3WaveFormat.Channels);
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oggfileSize = oggBytes.Length;
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File.WriteAllBytes(Path.Combine(targetPathForAudioFiles, $"{fileNameWithoutExtension}.ogg"), oggBytes);
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}
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@ -424,135 +424,9 @@ namespace RMuseum.Services.Implementation
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}
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}
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enum PCMSample : int
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{
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EightBit = 1,
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SixteenBit = 2
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}
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private static byte[] ConvertRawPCMFile(int OutputSampleRate, int OutputChannels, byte[] PCMSamples, PCMSample PCMSampleSize, int PCMSampleRate, int PCMChannels)
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{
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int NumPCMSamples = (PCMSamples.Length / (int)PCMSampleSize / PCMChannels);
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float PCMDuraton = NumPCMSamples / (float)PCMSampleRate;
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int NumOutputSamples = (int)(PCMDuraton * OutputSampleRate);
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//Ensure that samble buffer is aligned to write chunk size
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NumOutputSamples = (NumOutputSamples / WriteBufferSize) * WriteBufferSize;
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float[][] OutSamples = new float[OutputChannels][];
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for (int ch = 0; ch < OutputChannels; ch++)
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OutSamples[ch] = new float[NumOutputSamples];
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for (int sampleNumber = 0; sampleNumber < NumOutputSamples; sampleNumber++)
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{
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float rawSample = 0.0f;
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for (int ch = 0; ch < OutputChannels; ch++)
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{
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int sampleIndex = (sampleNumber * PCMChannels) * (int)PCMSampleSize;
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if (ch < PCMChannels) sampleIndex += (ch * (int)PCMSampleSize);
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switch (PCMSampleSize)
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{
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case PCMSample.EightBit:
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rawSample = ByteToSample(PCMSamples[sampleIndex]);
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break;
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case PCMSample.SixteenBit:
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rawSample = ShortToSample((short)(PCMSamples[sampleIndex + 1] << 8 | PCMSamples[sampleIndex]));
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break;
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}
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OutSamples[ch][sampleNumber] = rawSample;
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}
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}
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return GenerateFile(OutSamples, OutputSampleRate, OutputChannels);
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}
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private static float ByteToSample(short pcmValue)
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{
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return pcmValue / 128f;
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}
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private static float ShortToSample(short pcmValue)
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{
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return pcmValue / 32768f;
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}
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private static byte[] GenerateFile(float[][] FloatSamples, int SampleRate, int Channels)
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{
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using (MemoryStream outputData = new MemoryStream())
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{
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// Stores all the static vorbis bitstream settings
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var info = VorbisInfo.InitVariableBitRate(Channels, SampleRate, 0.5f);
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// set up our packet->stream encoder
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var serial = new Random().Next();
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var oggStream = new OggStream(serial);
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// =========================================================
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// HEADER
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// =========================================================
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// Vorbis streams begin with three headers; the initial header (with
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// most of the codec setup parameters) which is mandated by the Ogg
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// bitstream spec. The second header holds any comment fields. The
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// third header holds the bitstream codebook.
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var headerBuilder = new HeaderPacketBuilder();
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var comments = new Comments();
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comments.AddTag("ARTIST", "TEST");
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var infoPacket = headerBuilder.BuildInfoPacket(info);
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var commentsPacket = headerBuilder.BuildCommentsPacket(comments);
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var booksPacket = headerBuilder.BuildBooksPacket(info);
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oggStream.PacketIn(infoPacket);
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oggStream.PacketIn(commentsPacket);
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oggStream.PacketIn(booksPacket);
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// Flush to force audio data onto its own page per the spec
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FlushPages(oggStream, outputData, true);
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// =========================================================
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// BODY (Audio Data)
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// =========================================================
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var processingState = ProcessingState.Create(info);
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processingState.WriteData(FloatSamples, FloatSamples[0].Length);
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for (int readIndex = 0; readIndex <= FloatSamples[0].Length; readIndex += WriteBufferSize)
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{
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OggPacket packet;
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while (!oggStream.Finished
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&& processingState.PacketOut(out packet))
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{
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oggStream.PacketIn(packet);
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FlushPages(oggStream, outputData, false);
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}
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}
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FlushPages(oggStream, outputData, true);
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return outputData.ToArray();
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}
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}
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private static void FlushPages(OggStream oggStream, Stream Output, bool Force)
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{
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OggPage page;
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while (oggStream.PageOut(out page, Force))
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{
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Output.Write(page.Header, 0, page.Header.Length);
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Output.Write(page.Body, 0, page.Body.Length);
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}
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}
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private static int WriteBufferSize = 512;
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private static readonly int[] SampleRates = { 8000, 11025, 16000, 22050, 32000, 44100 };
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/// <summary>
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@ -597,6 +471,7 @@ namespace RMuseum.Services.Implementation
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/// </summary>
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/// <param name="context"></param>
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/// <param name="configuration"></param>
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/// <param name="backgroundTaskQueue"></param>
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public AudioNarrationService(RMuseumDbContext context, IConfiguration configuration, IBackgroundTaskQueue backgroundTaskQueue)
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{
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_context = context;
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141
RMuseum/Services/Implementation/OggVorbisConvertor.cs
Normal file
141
RMuseum/Services/Implementation/OggVorbisConvertor.cs
Normal file
@ -0,0 +1,141 @@
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using OggVorbisEncoder;
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using System;
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using System.IO;
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namespace RMuseum.Services.Implementation
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{
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internal enum PCMSample : int
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{
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EightBit = 1,
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SixteenBit = 2
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}
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/// <summary>
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/// ogg vorbis convertor
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/// </summary>
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internal static class OggVorbisConvertor
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{
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public static byte[] ConvertRawPCMFile(int OutputSampleRate, int OutputChannels, byte[] PCMSamples, PCMSample PCMSampleSize, int PCMSampleRate, int PCMChannels)
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{
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int NumPCMSamples = (PCMSamples.Length / (int)PCMSampleSize / PCMChannels);
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float PCMDuraton = NumPCMSamples / (float)PCMSampleRate;
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int NumOutputSamples = (int)(PCMDuraton * OutputSampleRate);
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//Ensure that samble buffer is aligned to write chunk size
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NumOutputSamples = (NumOutputSamples / WriteBufferSize) * WriteBufferSize;
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float[][] OutSamples = new float[OutputChannels][];
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for (int ch = 0; ch < OutputChannels; ch++)
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OutSamples[ch] = new float[NumOutputSamples];
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for (int sampleNumber = 0; sampleNumber < NumOutputSamples; sampleNumber++)
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{
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float rawSample = 0.0f;
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for (int ch = 0; ch < OutputChannels; ch++)
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{
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int sampleIndex = (sampleNumber * PCMChannels) * (int)PCMSampleSize;
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if (ch < PCMChannels) sampleIndex += (ch * (int)PCMSampleSize);
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switch (PCMSampleSize)
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{
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case PCMSample.EightBit:
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rawSample = ByteToSample(PCMSamples[sampleIndex]);
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break;
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case PCMSample.SixteenBit:
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rawSample = ShortToSample((short)(PCMSamples[sampleIndex + 1] << 8 | PCMSamples[sampleIndex]));
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break;
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}
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OutSamples[ch][sampleNumber] = rawSample;
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}
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}
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return GenerateFile(OutSamples, OutputSampleRate, OutputChannels);
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}
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private static float ByteToSample(short pcmValue)
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{
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return pcmValue / 128f;
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}
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private static float ShortToSample(short pcmValue)
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{
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return pcmValue / 32768f;
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}
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private static byte[] GenerateFile(float[][] FloatSamples, int SampleRate, int Channels)
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{
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using (MemoryStream outputData = new MemoryStream())
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{
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// Stores all the static vorbis bitstream settings
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var info = VorbisInfo.InitVariableBitRate(Channels, SampleRate, 0.5f);
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// set up our packet->stream encoder
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var serial = new Random().Next();
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var oggStream = new OggStream(serial);
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// =========================================================
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// HEADER
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// =========================================================
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// Vorbis streams begin with three headers; the initial header (with
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// most of the codec setup parameters) which is mandated by the Ogg
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// bitstream spec. The second header holds any comment fields. The
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// third header holds the bitstream codebook.
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var headerBuilder = new HeaderPacketBuilder();
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var comments = new Comments();
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comments.AddTag("ARTIST", "TEST");
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var infoPacket = headerBuilder.BuildInfoPacket(info);
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var commentsPacket = headerBuilder.BuildCommentsPacket(comments);
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var booksPacket = headerBuilder.BuildBooksPacket(info);
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oggStream.PacketIn(infoPacket);
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oggStream.PacketIn(commentsPacket);
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oggStream.PacketIn(booksPacket);
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// Flush to force audio data onto its own page per the spec
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FlushPages(oggStream, outputData, true);
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// =========================================================
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// BODY (Audio Data)
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// =========================================================
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var processingState = ProcessingState.Create(info);
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processingState.WriteData(FloatSamples, FloatSamples[0].Length);
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for (int readIndex = 0; readIndex <= FloatSamples[0].Length; readIndex += WriteBufferSize)
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{
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OggPacket packet;
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while (!oggStream.Finished
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&& processingState.PacketOut(out packet))
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{
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oggStream.PacketIn(packet);
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FlushPages(oggStream, outputData, false);
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}
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}
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FlushPages(oggStream, outputData, true);
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return outputData.ToArray();
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}
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}
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private static void FlushPages(OggStream oggStream, Stream Output, bool Force)
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{
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OggPage page;
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while (oggStream.PageOut(out page, Force))
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{
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Output.Write(page.Header, 0, page.Header.Length);
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Output.Write(page.Body, 0, page.Body.Length);
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}
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}
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private static int WriteBufferSize = 512;
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private static readonly int[] SampleRates = { 8000, 11025, 16000, 22050, 32000, 44100 };
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}
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}
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