Package com.ms.com.directX

Previous

Microsoft Packages

Index

Next

Class WaveFormatEx

public final class WaveFormatEx {
  public short wFormatTag;
  public short nChannels;
  public int nSamplesPerSec;
  public int nAvgBytesPerSec;
  public short nBlockAlign;
  public short wBitsPerSample;
  public short cbSize;
  public byte[] extra;
}

Specifies the format of data in a sound buffer.

Fields

wFormatTag

Waveform-audio format type. Format tags are registered with Microsoft Corporation for many compression algorithms.

nChannels

Number of channels in the waveform-audio data. Monaural data uses one channel and stereo data uses two channels.

nSamplesPerSec

Sample rate, in samples per second (hertz), that each channel should be played or recorded.

nAvgBytesPerSec

Required average data-transfer rate, in bytes per second, for the format tag.

nBlockAlign

Block alignment, in bytes. The block alignment is the minimum atomic unit of data for the wFormatTag format type. Playback and record software must process a multiple of nBlockAlign bytes of data at a time. Data written and read from a device must always start at the beginning of a block. For example, it is illegal to start playback of PCM data in the middle of a sample (that is, on a non-block-aligned boundary).

wBitsPerSample

Bits per sample for the wFormatTag format type. If a compression scheme cannot define a bits-per-sample value, this field is zero.

cbSize

Size, in bytes, of extra format information.

extra

Array variable that contains extra format information.