The Buffer Object

The Buffer object in JavaScript is a companion to the buffer~ object you instantiate in Max patchers, and provides the ability to access samples and metadata for the buffer~ object with the associated name.

Buffer Constructor

var buf = new Buffer("name")

The name is required at the time the object is created.


The following methods relate to the functionality from the Max buffer~, info~, peak~, and poke~, objects. Please see the references for those objects for details.

Buffer Methods

channelcount

Return the number of channels in the buffer~ object.

framecount

Return the number of frames (samples in a single channel) in the buffer~ object.

freepeer

Frees the image data from the native c peer, which is not considered by the JavaScript garbage collector, and may consume lots of memory until the garbage collector decides to run based on JS allocated memory. Once called, the Image object is not available for any other use.

length

Return the length of the buffer~ object in milliseconds.

peek

Arguments

channel [int]
frame [int]
count [int]

Return an array with count samples from channel (1-based counting) starting at frame (zero-based counting).

poke

Arguments

channel [int]
frame [int]
samples [float/array]

Write into the buffer~ object at channel (1-based counting) and frame (0-based counting). Samples may be a single sample value or an array of sample values. It is computationally more efficient to use an array).

send

Arguments

message-name [string]
arguments [anything]

Send a message to the associated buffer~ object. Can send any message that buffer~ understands.

Examples

Example code can be found in the "js" tab of the buffer~ help patcher.

See Also

Name Description
JavaScript Usage JavaScript Usage