77 lines
3.3 KiB
Plaintext
77 lines
3.3 KiB
Plaintext
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Runtime.InteropServices;
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namespace LumiSoft.Media.Wave.Native
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{
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// Why this must be class ? otherwise in win XP won't work.
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/// <summary>
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/// This class represents WAVEFORMATEX structure.
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/// </summary>
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[StructLayout(LayoutKind.Sequential)]
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internal class WAVEFORMATEX
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{
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/// <summary>
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/// Waveform-audio format type. Format tags are registered with Microsoft Corporation for many
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/// compression algorithms. A complete list of format tags can be found in the Mmreg.h header file.
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/// For one- or two-channel PCM data, this value should be WAVE_FORMAT_PCM. When this structure is
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/// included in a WAVEFORMATEXTENSIBLE structure, this value must be WAVE_FORMAT_EXTENSIBLE.</summary>
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public ushort wFormatTag;
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/// <summary>
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/// Number of channels in the waveform-audio data. Monaural data uses one channel and stereo data
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/// uses two channels.
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/// </summary>
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public ushort nChannels;
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/// <summary>
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/// Sample rate, in samples per second (hertz). If wFormatTag is WAVE_FORMAT_PCM, then common
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/// values for nSamplesPerSec are 8.0 kHz, 11.025 kHz, 22.05 kHz, and 44.1 kHz.
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/// </summary>
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public uint nSamplesPerSec;
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/// <summary>
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/// Required average data-transfer rate, in bytes per second, for the format tag. If wFormatTag
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/// is WAVE_FORMAT_PCM, nAvgBytesPerSec should be equal to the product of nSamplesPerSec and nBlockAlign.
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/// </summary>
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public uint nAvgBytesPerSec;
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/// <summary>
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/// Block alignment, in bytes. The block alignment is the minimum atomic unit of data for the wFormatTag
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/// format type. If wFormatTag is WAVE_FORMAT_PCM or WAVE_FORMAT_EXTENSIBLE, nBlockAlign must be equal
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/// to the product of nChannels and wBitsPerSample divided by 8 (bits per byte).
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/// </summary>
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public ushort nBlockAlign;
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/// <summary>
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/// Bits per sample for the wFormatTag format type. If wFormatTag is WAVE_FORMAT_PCM, then
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/// wBitsPerSample should be equal to 8 or 16.
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/// </summary>
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public ushort wBitsPerSample;
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/// <summary>
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/// Size, in bytes, of extra format information appended to the end of the WAVEFORMATEX structure.
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/// </summary>
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public ushort cbSize;
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#region method ToString
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/// <summary>
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/// Returns this object field values as string list.
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/// </summary>
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/// <returns>Returns this object field values as string list.</returns>
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public override string ToString()
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{
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StringBuilder retVal = new StringBuilder();
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retVal.Append("wFormatTag: " + wFormatTag + "\r\n");
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retVal.Append("nChannels: " + nChannels + "\r\n");
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retVal.Append("nSamplesPerSec: " + nSamplesPerSec + "\r\n");
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retVal.Append("nAvgBytesPerSec: " + nAvgBytesPerSec + "\r\n");
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retVal.Append("nBlockAlign: " + nBlockAlign + "\r\n");
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retVal.Append("wBitsPerSample: " + wBitsPerSample + "\r\n");
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retVal.Append("cbSize: " + cbSize + "\r\n");
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return retVal.ToString();
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}
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#endregion
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}
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}
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