Interface ALSimpleAudioBuffer.IALAudioBuffer

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Package: AudioLabBasicPkg

Unit: ALSimpleAudioBuffer

Inherits: IMLMediaBuffer

Contents 1 Syntax 1.1 Delphi: 2 Summary 3 Description 4 Properties 5 Methods

Syntax

Delphi:

type IALAudioBuffer = interface( IMLMediaBuffer )

Summary

Audio data buffer interface.

Description

Defines Audio data buffer interface.

Properties

• Item - Access to individual sample of individual audio channel of the audio data buffer.
• Channels - Access to individual audio channel of the audio data buffer.

Methods

• function GetChannels() : Cardinal - Returns the number of channels for the buffer data.
• function GetBitsPerSample() : Cardinal - Returns the bits per sample for the buffer data.
• function GetSamplesPerSecond() : Cardinal - Returns the Sample Rate in Audio Samples Per Second.
• function GetDataStep() : Cardinal - Returns the step in bytes between each 2 audio samples.
• function GetChannelMask() : TALSpeakers - Returns the channel mask indicating which channels (Speakers) are active.
• function GetSampleBitWidth() : Cardinal - Returns the size of each sample in number of bits.
• function GetWaveFormat() : TALWaveFormatExtensible - Returns the WaveFormatExtensible structure for the audio data in the buffer.
• function GetDataOffset() : Cardinal - Returns the offset from the beginning of the buffer where the format information ends and the real data starts. This method is rarely used.
• function IsEqualToValue(AValue : Integer) : Boolean - Returns true if all the samples in the buffer are equal to a value.
• function IsEqualChannelValue(AChannel : Integer; AValue : Integer) : Boolean - Returns true if all the samples in a buffer channel are equal to a value.
• function Read() : PAnsiChar - Returns read only pointer to the buffer data.
• function Write() : PAnsiChar - Returns write pointer to the buffer data.
• function Modify() : PAnsiChar - Returns read and write pointer to the buffer data.
• function GetItem(Index : Cardinal; Channel : Cardinal) : Integer - Returns individual sample of individual audio channel of the audio data buffer.
• procedure SetItem(Index : Cardinal; Channel : Cardinal; AValue : Integer) - Sets value to individual sample of individual audio channel of the audio data buffer.
• procedure Add(Right : IALAudioBuffer) - Adds the values of the samples of another buffer to the corresponding samples of this buffer.
• procedure Subtract(Right : IALAudioBuffer) - Subtracts the samples in the buffer by the corresponding samples of another buffer.
• procedure Multiply(Right : IALAudioBuffer) - Multiples the samples in the buffer by the corresponding samples of another buffer.
• procedure Divide(Right : IALAudioBuffer) - Divides the samples in the buffer by the corresponding samples of another buffer.
• procedure SetValue(AValue : Integer) - Sets all samples of the buffer to a specified value.
• procedure AddValue(AValue : Integer) - Adds an integer value to each element of the buffer.
• procedure SubtractValue(AValue : Integer) - Subtracts an integer value from each element of the buffer.
• procedure MultiplyValue(AValue : Integer) - Multiplies an integer value to each element of the buffer.
• procedure DivideValue(AValue : Integer) - Divides each element of the buffer data by a value.
• procedure SetChannelValue(AChannel : Integer; AValue : Integer) - Sets all samples of a buffer channel to a specified value.
• procedure AddChannelValue(AChannel : Integer; AValue : Integer) - Adds an integer value to each element of a buffer channel.
• procedure SubChannelValue(AChannel : Integer; AValue : Integer) - Sets all samples of a buffer channel to a specified value.
• procedure MulChannelValue(AChannel : Integer; AValue : Integer) - Multiplies an integer value to each element of a buffer channel.
• procedure DivChannelValue(AChannel : Integer; AValue : Integer) - Divides each element of the buffer channel data by a value.
• procedure Zero() - Sets all the samples of the buffer to Zero (Silence).
• procedure MultiplyByReal(AValue : Real) - Multiplies the data in the buffer by a real.
• procedure Resize(Size : Cardinal; PreserveData : Boolean) - Resizes the array and the contained buffers.
• function GetChannel(AIndex : Cardinal) : ISLIntegerBuffer - Returns the channel data ad an ISLIntegerBuffer.
• function GetChannelAsReal(AIndex : Cardinal) : ISLRealBuffer - Returns the channel data ad an ISLRealBuffer.