Package timeside :: Package grapher :: Module waveform_simple :: Class Waveform

Class Waveform

         object --+            
                  |            
component.Component --+        
                      |        
         core.Processor --+    
                          |    
               core.Grapher --+
                              |
                             Waveform

Known Subclasses:

Builds a PIL image representing a simple waveform of the audio stream.

Nested Classes

[hide private]

Inherited from core.Processor: __metaclass__

Instance Methods

[hide private]

__init__(self, width=1024, height=256, bg_color=(255, 255, 255), color_scheme='default')
Create a new grapher. source code

setup(self, channels=None, samplerate=None, blocksize=None, totalframes=None)
Allocate internal resources and reset state, so that this processor is ready for a new run.

source code

process(self, frames, eod=False)
Process input frames and return a (output_frames, eod) tuple.

source code

post_process(self, output=None)
Post-Process data after processign the input frames with process()

source code

Inherited from core.Grapher: draw_anti_aliased_pixels, draw_peaks, draw_peaks_contour, draw_peaks_inverted, render, set_colors, watermark

Inherited from core.Processor: __del__, __or__, blocksize, channels, mediainfo, release, samplerate, totalframes, uuid

Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Static Methods

[hide private]

id()
Short alphanumeric, lower-case string which uniquely identify this processor, suitable for use as an HTTP/GET argument value, in filenames, etc...

source code

name()
Return the graph name, such as "Waveform", "Spectral view", etc..

source code

Class Variables

[hide private]

Inherited from core.Grapher: fft_size, frame_cursor, lower_freq, pixel_cursor

Properties

[hide private]

Inherited from object: __class__

Method Details

[hide private]

init(self, width=1024, height=256, bg_color=`(`255`,` 255`,` 255`)`, color_scheme=`'default'`)
(Constructor)

source code

Create a new grapher. width and height are generally in pixels but could be something else for eg. svg rendering, etc..

Decorators:

@interfacedoc

Overrides: object.__init__

id()
Static Method

source code

Short alphanumeric, lower-case string which uniquely identify this processor, suitable for use as an HTTP/GET argument value, in filenames, etc...

Decorators:

@interfacedoc

Overrides: core.Grapher.id

name()
Static Method

source code

Return the graph name, such as "Waveform", "Spectral view", etc..

Decorators:

@interfacedoc

Overrides: core.Grapher.name

setup(self, channels=None, samplerate=None, blocksize=None, totalframes=None)

source code

Allocate internal resources and reset state, so that this processor is ready for a new run.

The channels, samplerate and/or blocksize and/or totalframes arguments may be required by processors which accept input. An error will occur if any of these arguments is passed to an output-only processor such as a decoder.

Decorators:

@interfacedoc

Overrides: core.Processor.setup

process(self, frames, eod=False)

source code

Process input frames and return a (output_frames, eod) tuple. Both input and output frames are 2D numpy arrays, where columns are channels, and containing an undetermined number of frames. eod=True means that the end-of-data has been reached.

Output-only processors (such as decoders) will raise an exception if the frames argument is not None. All processors (even encoders) return data, even if that means returning the input unchanged.

Warning: it is required to call setup() before this method.

Decorators:

@interfacedoc

Overrides: core.Processor.process

post_process(self, output=None)

source code

Post-Process data after processign the input frames with process()

Processors such as analyzers will produce Results during the Post-Process

Decorators:

@interfacedoc

Overrides: core.Processor.post_process

Class Waveform

__init__(self, width=1024, height=256, bg_color=(255, 255, 255), color_scheme='default') (Constructor)

id() Static Method

name() Static Method

setup(self, channels=None, samplerate=None, blocksize=None, totalframes=None)

process(self, frames, eod=False)

post_process(self, output=None)

init(self, width=1024, height=256, bg_color=`(`255`,` 255`,` 255`)`, color_scheme=`'default'`)
(Constructor)

id()
Static Method

name()
Static Method