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repet_gui.m
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repet_gui.m
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function repet_gui
% REPET_GUI REpeating Pattern Extraction Technique (REPET) graphical user interface (GUI).
%
% Toolbar:
% Open Mixture: Open mixture file (as .wav or .mp3)
% Play Mixture: Play/stop selected mixture audio
% Select: Select/deselect on signal axes (left/right mouse click)
% Zoom: Zoom on any axes
% Pan: Pan on any axes
% REPET: Process selected mixture using REPET
% Save Background: Save background estimate of selected mixture (as .wav)
% Play Background: Play/stop background audio of selected mixture
% Save Foreground: Save foreground estimate of selected mixture (as .wav)
% Play Foreground: Play/stop foreground audio of selected mixture
% Mixture axes:
% Mixture signal axes: Display mixture signal
% Mixture spectrogram axes: Display mixture spectrogram
% Beat spectrum axes: Display beat spectrum of selected mixture
% Background and foreground axes:
% Background signal axes: Display background signal of selected mixture
% Background spectrogram axes: Display background spectrogram of selected mixture
% Foreground signal axes: Display foreground signal of selected mixture
% Foreground spectrogram axes: Display foreground spectrogram of selected mixture
%
% See also http://zafarrafii.com/#REPET
%
% References:
% Zafar Rafii, Antoine Liutkus, and Bryan Pardo. "REPET for
% Background/Foreground Separation in Audio," Blind Source
% Separation, chapter 14, pages 395-411, Springer Berlin Heidelberg,
% 2014.
%
% Zafar Rafii and Bryan Pardo. "Audio Separation System and Method,"
% US 20130064379 A1, March 2013.
%
% Zafar Rafii and Bryan Pardo. "REpeating Pattern Extraction
% Technique (REPET): A Simple Method for Music/Voice Separation,"
% IEEE Transactions on Audio, Speech, and Language Processing, volume
% 21, number 1, pages 71-82, January, 2013.
%
% Zafar Rafii and Bryan Pardo. "A Simple Music/Voice Separation
% Method based on the Extraction of the Repeating Musical Structure,"
% 36th International Conference on Acoustics, Speech and Signal
% Processing, Prague, Czech Republic, May 22-27, 2011.
%
% Author:
% Zafar Rafii
% zafarrafii@gmail.com
% http://zafarrafii.com
% https://github.com/zafarrafii
% https://www.linkedin.com/in/zafarrafii/
% 10/23/18
% Get screen size
screen_size = get(0,'ScreenSize');
% Create the figure window
figure_object = figure( ...
'Visible','off', ...
'Position',[screen_size(3:4)/4+1,screen_size(3:4)/2], ...
'Name','REPET GUI', ...
'NumberTitle','off', ...
'MenuBar','none', ...
'CloseRequestFcn',@figurecloserequestfcn);
% Create a toolbar on figure
toolbar_object = uitoolbar(figure_object);
% Play and stop icons for the play audio buttons
play_icon = playicon;
stop_icon = stopicon;
% Create the open and play push buttons on toolbar
openmixture_button = uipushtool(toolbar_object, ...
'CData',iconread('file_open.png'), ...
'TooltipString','Open Mixture', ...
'Enable','on', ...
'ClickedCallback',@openmixtureclickedcallback); %#ok<*NASGU>
playmixture_button = uipushtool(toolbar_object, ...
'CData',play_icon, ...
'TooltipString','Play Mixture', ...
'Enable','off', ...
'UserData',struct('PlayIcon',play_icon,'StopIcon',stop_icon));
% Create the pointer, zoom, and hand toggle buttons on toolbar
select_button = uitoggletool(toolbar_object, ...
'Separator','On', ...
'CData',iconread('tool_pointer.png'), ...
'TooltipString','Select', ...
'Enable','off', ...
'ClickedCallBack',@selectclickedcallback);
zoom_button = uitoggletool(toolbar_object, ...
'CData',iconread('tool_zoom_in.png'), ...
'TooltipString','Zoom', ...
'Enable','off',...
'ClickedCallBack',@zoomclickedcallback);
pan_button = uitoggletool(toolbar_object, ...
'CData',iconread('tool_hand.png'), ...
'TooltipString','Pan', ...
'Enable','off',...
'ClickedCallBack',@panclickedcallback);
% Create the REPET push button on toolbar
repet_button = uipushtool(toolbar_object, ...
'Separator','On', ...
'CData',repeticon, ...
'TooltipString','REPET', ...
'Enable','off');
% Create save and play background and foreground push buttons on toolbar
savebackground_button = uipushtool(toolbar_object, ...
'Separator','On', ...
'CData',iconread('file_save.png'), ...
'TooltipString','Save Background', ...
'Enable','off');
playbackground_button = uipushtool(toolbar_object, ...
'CData',play_icon, ...
'TooltipString','Play Background', ...
'Enable','off', ...
'UserData',struct('PlayIcon',play_icon,'StopIcon',stop_icon));
saveforeground_button = uipushtool(toolbar_object, ...
'Separator','On', ...
'CData',iconread('file_save.png'), ...
'Tooltip','Save Foreground', ...
'Enable','off');
playforeground_button = uipushtool(toolbar_object, ...
'CData',play_icon, ...
'Tooltip','Play Foreground', ...
'Enable','off', ...
'UserData',struct('PlayIcon',play_icon,'StopIcon',stop_icon));
% Create the mixture signal and spectrogram axes, and the beat spectrum
% axes
mixturesignal_axes = axes( ...
'OuterPosition',[0,0.9,0.5,0.1], ...
'Visible','off');
mixturespectrogram_axes = axes( ...
'OuterPosition',[0,0.5,0.5,0.4], ...
'Visible','off');
beatspectrum_axes = axes( ...
'OuterPosition',[0,0.2,0.5,0.2], ...
'Visible','off');
% Create the background and foreground signal and spectrogram axes
backgroundsignal_axes = axes( ...
'OuterPosition',[0.5,0.9,0.5,0.1], ...
'Visible','off');
backgroundspectrogram_axes = axes( ...
'OuterPosition',[0.5,0.5,0.5,0.4], ...
'Visible','off');
foregroundsignal_axes = axes( ...
'OuterPosition',[0.5,0.4,0.5,0.1], ...
'Visible','off');
foregroundspectrogram_axes = axes( ...
'OuterPosition',[0.5,0,0.5,0.4], ...
'Visible','off');
% Synchronize the x-axis limits of all the axes but the beat spectrum axes
% and both the x-axis and y-axis limits of the spectrogram axes
linkaxes([mixturesignal_axes,mixturespectrogram_axes,...
backgroundsignal_axes,backgroundspectrogram_axes, ...
foregroundsignal_axes,foregroundspectrogram_axes],'x')
linkaxes([mixturespectrogram_axes,backgroundspectrogram_axes, ...
foregroundspectrogram_axes],'xy')
% Change the pointer when the mouse moves over an audio signal or the beat
% spectrum axes
enterFcn = @(figure_handle,currentPoint) set(figure_handle,'Pointer','ibeam');
iptSetPointerBehavior(mixturesignal_axes,enterFcn);
iptSetPointerBehavior(beatspectrum_axes,enterFcn);
iptSetPointerBehavior(backgroundsignal_axes,enterFcn);
iptSetPointerBehavior(foregroundsignal_axes,enterFcn);
iptPointerManager(figure_object);
% Change the pointer when the mouse moves over the figure object and the
% spectrogram axes
enterFcn = @(figure_handle,currentPoint) set(figure_handle,'Pointer','arrow');
iptSetPointerBehavior(figure_object,enterFcn)
iptSetPointerBehavior(mixturespectrogram_axes,enterFcn)
iptPointerManager(figure_object);
% Initialize the audio players for the mixture, background, and foreground
% (for the figure's close request callback)
mixture_player = audioplayer(0,80);
background_player = audioplayer(0,80);
foreground_player = audioplayer(0,80);
% Make the figure visible
figure_object.Visible = 'on';
% Clicked callback function for the open mixture toggle button
function openmixtureclickedcallback(~,~)
% Open file selection dialog box; return if cancel
[mixture_name,mixture_path] = uigetfile({'*.wav';'*.mp3'}, ...
'Select WAVE or MP3 File to Open');
if isequal(mixture_name,0) || isequal(mixture_path,0)
return
end
% Remove the figure's close request callback so that it allows all
% the other objects to get created before it can get closed
figure_object.CloseRequestFcn = '';
% Change the pointer symbol while the figure is busy
figure_object.Pointer = 'watch';
drawnow
% If any audio is playing, stop it
if isplaying(mixture_player)
stop(mixture_player)
end
if isplaying(background_player)
stop(background_player)
end
if isplaying(foreground_player)
stop(foreground_player)
end
% Clear all the (old) axes and hide them
cla(mixturesignal_axes)
mixturesignal_axes.Visible = 'off';
cla(mixturespectrogram_axes)
mixturespectrogram_axes.Visible = 'off';
cla(beatspectrum_axes)
beatspectrum_axes.Visible = 'off';
cla(backgroundsignal_axes)
backgroundsignal_axes.Visible = 'off';
cla(backgroundspectrogram_axes)
backgroundspectrogram_axes.Visible = 'off';
cla(foregroundsignal_axes)
foregroundsignal_axes.Visible = 'off';
cla(foregroundspectrogram_axes)
foregroundspectrogram_axes.Visible = 'off';
drawnow
% Build full file name
mixture_file = fullfile(mixture_path,mixture_name);
% Read mixture file and return sample rate in Hz
[mixture_signal,sample_rate] = audioread(mixture_file);
% Number of samples and channels
[number_samples,number_channels] = size(mixture_signal);
% Plot the mixture signal and make it unable to capture mouse
% clicks
plot(mixturesignal_axes, ...
1/sample_rate:1/sample_rate:number_samples/sample_rate, ...
mixture_signal, ...
'PickableParts','none');
% Update the mixture signal axes properties
mixturesignal_axes.XLim = [1,number_samples]/sample_rate;
mixturesignal_axes.YLim = [-1,1];
mixturesignal_axes.XGrid = 'on';
mixturesignal_axes.Title.String = mixture_name;
mixturesignal_axes.Title.Interpreter = 'None';
mixturesignal_axes.XLabel.String = 'Time (s)';
mixturesignal_axes.Layer = 'top';
mixturesignal_axes.UserData.PlotXLim = [1,number_samples]/sample_rate;
mixturesignal_axes.UserData.SelectXLim = [1,number_samples]/sample_rate;
drawnow
% Window length in samples (audio stationary around 40 ms and power
% of 2 for fast FFT and constant overlap-add)
window_length = 2.^nextpow2(0.04*sample_rate);
% Window function ('periodic' Hamming window for constant
% overlap-add)
window_function = hamming(window_length,'periodic');
% Step length (half the (even) window length for constant
% overlap-add)
step_length = window_length/2;
% Number of time frames
number_times = ceil((window_length-step_length+number_samples)/step_length);
% Short-time Fourier transform (STFT) for every channel
mixture_stft = zeros(window_length,number_times,number_channels);
for channel_index = 1:number_channels
mixture_stft(:,:,channel_index) ...
= stft(mixture_signal(:,channel_index),window_function,step_length);
end
% Magnitude spectrogram (with DC component and without mirrored
% frequencies)
mixture_spectrogram = abs(mixture_stft(1:window_length/2+1,:,:));
% Functions to convert time from seconds to frames and from frames
% to seconds
sec2tim = @(x) round(x*sample_rate/number_samples*number_times);
tim2sec = @(x) x/number_times*number_samples/sample_rate;
% Display the mixture spectrogram (in dB, averaged over the
% channels)
imagesc(mixturespectrogram_axes, ...
tim2sec([1,number_times]), ...
[1,window_length/2]/window_length*sample_rate, ...
db(mean(mixture_spectrogram(2:end,:),3)))
% Update the mixture spectrogram axes properties
mixturespectrogram_axes.XLim = [1,number_samples]/sample_rate;
mixturespectrogram_axes.YDir = 'normal';
mixturespectrogram_axes.XGrid = 'on';
mixturespectrogram_axes.Colormap = jet;
mixturespectrogram_axes.Title.String = 'Audio Spectrogram';
mixturespectrogram_axes.XLabel.String = 'Time (s)';
mixturespectrogram_axes.YLabel.String = 'Frequency (Hz)';
drawnow
% Create object for playing audio for the mixture signal
mixture_player = audioplayer(mixture_signal,sample_rate);
% Set a select line and a play line on the mixture signal axes
selectline(mixturesignal_axes)
playline(mixturesignal_axes,mixture_player,playmixture_button);
% Add clicked callback function to the play mixture button
playmixture_button.ClickedCallback = {@playaudioclickedcallback,mixture_player,mixturesignal_axes};
% Add clicked callback function to the REPET button
repet_button.ClickedCallback = @repetclickedcallback;
% Enable the play mixture, select, zoom, pan, and REPET buttons
playmixture_button.Enable = 'on';
select_button.Enable = 'on';
zoom_button.Enable = 'on';
pan_button.Enable = 'on';
repet_button.Enable = 'on';
% Change the select button state to on
select_button.State = 'on';
% Add the figure's close request callback back
figure_object.CloseRequestFcn = @figurecloserequestfcn;
% Change the pointer symbol back
figure_object.Pointer = 'arrow';
drawnow
% Clicked callback function for the REPET button
function repetclickedcallback(~,~)
% Remove the figure's close request callback so that it allows
% all the other objects to get created before it can get closed
figure_object.CloseRequestFcn = '';
% Change the pointer symbol while the figure is busy
figure_object.Pointer = 'watch';
drawnow
% Select limits from the mixture signal axes' user data
select_limits = mixturesignal_axes.UserData.SelectXLim;
% Derive the sample range
if select_limits(1) == select_limits(2)
% If it is a select line
sample_range = [1,number_samples];
else
% If it is a select region
sample_range = round(select_limits*sample_rate);
end
% Translate to a time range in time frames
time_range = ceil(sample_range/number_samples*number_times);
% Beat spectrum of the spectrogram averaged over the channels
% (squared to emphasize peaks of periodicitiy)
beat_spectrum = beatspectrum(mean(mixture_spectrogram(:,time_range(1):time_range(2)),3).^2);
% Normalize the beat spectrum by lag 0
beat_spectrum = beat_spectrum/beat_spectrum(1);
% Number of lags in time frames (including lag 0)
number_lags = length(beat_spectrum);
% Beat limits for the repeating period on the beat spectrum in
% seconds
beat_limits = tim2sec([1,floor(number_lags/3)]);
% Period range in seconds for the beat spectrum
period_range = [1,10];
% Repeating period in time frames given the period range
repeating_period = repeatingperiod(beat_spectrum,sec2tim(period_range));
% Plot the beat spectrum and make it unable to capture mouse
% clicks
plot(beatspectrum_axes, ...
(0:tim2sec(1):tim2sec(number_lags-1)),beat_spectrum,'k','PickableParts','none')
% Update the beat spectrum axes properties
beatspectrum_axes.XLim = [0,tim2sec(number_lags-1)];
beatspectrum_axes.YLim = [0,1];
beatspectrum_axes.XGrid = 'on';
beatspectrum_axes.XMinorGrid = 'on';
beatspectrum_axes.Title.String = ['Beat Spectrum: repeating period = ', ...
num2str(round(tim2sec(repeating_period),3)),' seconds'];
beatspectrum_axes.XLabel.String = 'Lag (s)';
drawnow
% Initialize the beat lines as an array for graphic objects
number_lines = floor((number_lags-1)/repeating_period);
beat_lines = gobjects(number_lines,1);
% Create the main beat line and the other dotted lines on the
% beat spectrum axes
beat_lines(1) = line(beatspectrum_axes, ...
tim2sec(repeating_period)*[1,1],[-1,1], ...
'Color','r');
for line_index = 2:number_lines
beat_lines(line_index) = line(beatspectrum_axes, ...
tim2sec(repeating_period)*line_index*[1,1],[-1,1], ...
'Color','r', ...
'LineStyle',':', ...
'PickableParts','none');
end
% Change the pointer when the mouse moves over the main beat
% line
enterFcn = @(figure_handle,currentPoint) set(figure_handle,'Pointer','hand');
iptSetPointerBehavior(beat_lines(1),enterFcn);
iptPointerManager(figure_object);
% Add mouse-click callback functions to the beat spectrum axes
% and the main beat line
beatspectrum_axes.ButtonDownFcn = @beatspectrumaxesbuttondownfcn;
beat_lines(1).ButtonDownFcn = @beatlinebuttondownfcn;
% Cutoff frequency in Hz for the high-pass filtering of the
% foreground
cutoff_frequency = 100;
% Cutoff frequency in frequency channels
cutoff_frequency = round(cutoff_frequency*window_length/sample_rate);
% Initialize the background and foreground STFTs and signals
background_stft = zeros(window_length,time_range(2)-time_range(1)+1,number_channels);
background_signal = zeros(sample_range(2)-sample_range(1)+1,number_channels);
foreground_stft = zeros(window_length,time_range(2)-time_range(1)+1,number_channels);
foreground_signal = zeros(sample_range(2)-sample_range(1)+1,number_channels);
% Run REPET given the repeating period in time frames
repet(repeating_period)
% Add clicked callback functions for the save background and
% foreground buttons
savebackground_button.ClickedCallback = @savebackgroundclickedcallback;
saveforeground_button.ClickedCallback = @saveforegroundclickedcallback;
% Enable the save and play background and foreground buttons
savebackground_button.Enable = 'on';
playbackground_button.Enable = 'on';
saveforeground_button.Enable = 'on';
playforeground_button.Enable = 'on';
% Add the figure's close request callback back
figure_object.CloseRequestFcn = @figurecloserequestfcn;
% Change the pointer symbol back
figure_object.Pointer = 'arrow';
drawnow
% Mouse-click callback function for the beat spectrum axes
function beatspectrumaxesbuttondownfcn(~,~)
% Mouse selection type
selection_type = figure_object.SelectionType;
% If not click left mouse button, return
if ~strcmp(selection_type,'normal')
return
end
% Location of the mouse pointer
current_point = beatspectrum_axes.CurrentPoint;
% If the current point is out of the beat limits, return
if current_point(1,1) < beat_limits(1) || current_point(1,1) > beat_limits(2) || ...
current_point(1,2) < -1 || current_point(1,2) > 1
return
end
% Change the pointer when the mouse moves over the beat
% spectrum axes
enterFcn = @(figure_handle,currentPoint) set(figure_handle,'Pointer','hand');
iptSetPointerBehavior(beatspectrum_axes,enterFcn);
iptPointerManager(figure_object);
% Update the main beat line and re-create the dotted lines
beat_lines(1).XData = current_point(1,1)*[1,1];
delete(beat_lines(2:end))
number_lines = floor(tim2sec(number_lags-1)/current_point(1,1));
beat_lines = [beat_lines(1);gobjects(number_lines-1,1)];
for line_index = 2:number_lines %#ok<*FXUP>
beat_lines(line_index) = line(beatspectrum_axes, ...
current_point(1,1)*line_index*[1,1],[-1,1], ...
'Color','r', ...
'LineStyle',':', ...
'PickableParts','none');
end
% Update the repeating period in the beat spectrum title
beatspectrum_axes.Title.String = ['Beat Spectrum: repeating period = ', ...
num2str(round(current_point(1,1),3)),' seconds'];
% Add window button motion and up callback functions to the
% figure
figure_object.WindowButtonMotionFcn = @figurewindowbuttonmotionfcn;
figure_object.WindowButtonUpFcn = @figurewindowbuttonupfcn;
% Run REPET again given the current point in time frames
repet(sec2tim(current_point(1,1)))
end
% Mouse-click callback function for the main beat line
function beatlinebuttondownfcn(~,~)
% Mouse selection type
selection_type = figure_object.SelectionType;
% If not click left mouse button, return
if ~strcmp(selection_type,'normal')
return
end
% Change the pointer when the mouse moves over the beat
% spectrum axes and the figure object
enterFcn = @(figure_handle,currentPoint) set(figure_handle,'Pointer','hand');
iptSetPointerBehavior(beatspectrum_axes,enterFcn);
iptSetPointerBehavior(figure_object,enterFcn);
iptPointerManager(figure_object);
% Add window button motion and up callback functions to the
% figure
figure_object.WindowButtonMotionFcn = @figurewindowbuttonmotionfcn;
figure_object.WindowButtonUpFcn = @figurewindowbuttonupfcn;
end
% Window button motion callback function for the figure
function figurewindowbuttonmotionfcn(~,~)
% Location of the mouse pointer
current_point = beatspectrum_axes.CurrentPoint;
% If the current point is out of the beat limits, change it
% into the beat limits
if current_point(1,1) < beat_limits(1)
current_point(1,1) = beat_limits(1);
elseif current_point(1,1) > beat_limits(2)
current_point(1,1) = beat_limits(2);
end
% Update the main beat line and re-create the dotted lines
beat_lines(1).XData = current_point(1,1)*[1,1];
delete(beat_lines(2:end))
number_lines = floor(tim2sec(number_lags-1)/current_point(1,1));
beat_lines = [beat_lines(1);gobjects(number_lines-1,1)];
for line_index = 2:number_lines %#ok<*FXUP>
beat_lines(line_index) = line(beatspectrum_axes, ...
current_point(1,1)*line_index*[1,1],[-1,1], ...
'Color','r', ...
'LineStyle',':', ...
'PickableParts','none');
end
% Update repeating period in the beat spectrum title
beatspectrum_axes.Title.String = ['Beat Spectrum: repeating period = ', ...
num2str(round(current_point(1,1),3)),' seconds'];
end
% Window button up callback function for the figure
function figurewindowbuttonupfcn(~,~)
% Change the pointer when the mouse moves over the beat
% spectrum axes and the figure object
enterFcn = @(figure_handle,currentPoint) set(figure_handle,'Pointer','ibeam');
iptSetPointerBehavior(beatspectrum_axes,enterFcn);
iptPointerManager(figure_object);
enterFcn = @(figure_handle,currentPoint) set(figure_handle,'Pointer','arrow');
iptSetPointerBehavior(figure_object,enterFcn);
iptPointerManager(figure_object);
% Remove the window button motion and up callback functions
% of the figure
figure_object.WindowButtonMotionFcn = '';
figure_object.WindowButtonUpFcn = '';
% Repeating period in seconds from the main beat line
repeat_period = beat_lines(1).XData(1);
% Run REPET again given the current point in time frames
repet(sec2tim(repeat_period))
end
% REPET function given a repeating period in time frames
function repet(repeating_period)
% Loop over the channels
for channel_index = 1:number_channels
% Repeating mask for the current channel
repeating_mask ...
= repeatingmask(mixture_spectrogram(:,time_range(1):time_range(2),channel_index),repeating_period);
% High-pass filtering of the foreground
repeating_mask(2:cutoff_frequency+1,:) = 1;
% Mirror the frequency channels
repeating_mask = cat(1,repeating_mask,repeating_mask(end-1:-1:2,:));
% Estimated background STFT for the current channel
background_stft(:,:,channel_index) ...
= repeating_mask.*mixture_stft(:,time_range(1):time_range(2),channel_index);
% Estimated background signal
background_signal1 = istft(background_stft(:,:,channel_index),window_function,step_length);
% Truncate to the true number of samples
background_signal(:,channel_index) ...
= background_signal1(1:sample_range(2)-sample_range(1)+1);
end
% Plot the background signal and make it unable to capture
% mouse clicks
plot(backgroundsignal_axes, ...
sample_range(1)/sample_rate:1/sample_rate:sample_range(2)/sample_rate,background_signal, ...
'PickableParts','none');
% Update the background signal axes properties
backgroundsignal_axes.XLim = [1,number_samples]/sample_rate;
backgroundsignal_axes.YLim = [-1,1];
backgroundsignal_axes.XGrid = 'on';
backgroundsignal_axes.Title.String = 'Background Signal';
backgroundsignal_axes.XLabel.String = 'Time (s)';
backgroundsignal_axes.Layer = 'top';
backgroundsignal_axes.UserData.PlotXLim = select_limits;
backgroundsignal_axes.UserData.SelectXLim = select_limits;
drawnow
% Display the background spectrogram (in dB, averaged over
% the channels)
imagesc(backgroundspectrogram_axes, ...
tim2sec([time_range(1),time_range(2)]), ...
[1,window_length/2]/window_length*sample_rate, ...
db(mean(abs(background_stft(2:window_length/2+1,:,:)),3)))
% Update the background spectrogram axes properties
backgroundspectrogram_axes.XLim = [1,number_samples]/sample_rate;
backgroundspectrogram_axes.YDir = 'normal';
backgroundspectrogram_axes.XGrid = 'on';
backgroundspectrogram_axes.Colormap = jet;
backgroundspectrogram_axes.CLim = mixturespectrogram_axes.CLim;
backgroundspectrogram_axes.Title.String = 'Background Spectrogram';
backgroundspectrogram_axes.XLabel.String = 'Time (s)';
backgroundspectrogram_axes.YLabel.String = 'Frequency (Hz)';
drawnow
% Corresponding foreground signal and STFT
foreground_signal = mixture_signal(sample_range(1):sample_range(2),:)-background_signal;
foreground_stft = mixture_stft(:,time_range(1):time_range(2),:)-background_stft;
% Plot the foreground signal and make it unable to capture
% mouse clicks
plot(foregroundsignal_axes, ...
sample_range(1)/sample_rate:1/sample_rate:sample_range(2)/sample_rate,foreground_signal, ...
'PickableParts','none');
% Update the foreground signal axes properties
foregroundsignal_axes.XLim = [1,number_samples]/sample_rate;
foregroundsignal_axes.YLim = [-1,1];
foregroundsignal_axes.XGrid = 'on';
foregroundsignal_axes.Title.String = 'Foreground Signal';
foregroundsignal_axes.XLabel.String = 'Time (s)';
foregroundsignal_axes.Layer = 'top';
foregroundsignal_axes.UserData.PlotXLim = select_limits;
foregroundsignal_axes.UserData.SelectXLim = select_limits;
drawnow
% Display the foreground spectrogram (in dB, averaged over
% the channels)
imagesc(foregroundspectrogram_axes, ...
tim2sec([time_range(1),time_range(2)]), ...
[1,window_length/2]/window_length*sample_rate, ...
db(mean(abs(foreground_stft(2:window_length/2+1,:,:)),3)))
% Update the foreground spectrogram axes properties
foregroundspectrogram_axes.XLim = [1,number_samples]/sample_rate;
foregroundspectrogram_axes.YDir = 'normal';
foregroundspectrogram_axes.XGrid = 'on';
foregroundspectrogram_axes.Colormap = jet;
foregroundspectrogram_axes.CLim = mixturespectrogram_axes.CLim;
foregroundspectrogram_axes.Title.String = 'Foreground Spectrogram';
foregroundspectrogram_axes.XLabel.String = 'Time (s)';
foregroundspectrogram_axes.YLabel.String = 'Frequency (Hz)';
drawnow
% Create objects for playing audio for the background and
% foreground signals
background_player = audioplayer(background_signal,sample_rate);
foreground_player = audioplayer(foreground_signal,sample_rate);
% Add clicked callback functions to the play background and
% foreground buttons
playbackground_button.ClickedCallback = {@playaudioclickedcallback,background_player,backgroundsignal_axes};
playforeground_button.ClickedCallback = {@playaudioclickedcallback,foreground_player,foregroundsignal_axes};
% Set play lines and select lines on the background and
% foreground signal axes
selectline(backgroundsignal_axes)
playline(backgroundsignal_axes,background_player,playbackground_button);
selectline(foregroundsignal_axes)
playline(foregroundsignal_axes,foreground_player,playforeground_button);
end
% Clicked callback function for the save background button
function savebackgroundclickedcallback(~,~)
% Open dialog box for saving files; return if cancel
[background_name,background_path] = uiputfile('*.wav*', ...
'Save Background as WAVE File','background_file.wav');
if isequal(background_name,0) || isequal(background_path,0)
return
end
% Build full file name
background_file = fullfile(background_path,background_name);
% Write audio file
audiowrite(background_file,background_signal,sample_rate)
end
% Clicked callback function for the save foreground button
function saveforegroundclickedcallback(~,~)
% Open dialog box for saving files; return if cancel
[foreground_name,foreground_path] = uiputfile('*.wav*', ...
'Save Foreground as WAVE File','foreground_file.wav');
if isequal(foreground_name,0) || isequal(foreground_path,0)
return
end
% Build full file name
foreground_file = fullfile(foreground_path,foreground_name);
% Write audio file
audiowrite(foreground_file,foreground_signal,sample_rate)
end
end
end
% Clicked callback function for the select button
function selectclickedcallback(~,~)
% Keep the select button state to on and change the zoom and pan
% button states to off
select_button.State = 'on';
zoom_button.State = 'off';
pan_button.State = 'off';
% Turn the zoom off
zoom off
% Turn the pan off
pan off
end
% Clicked callback function for the zoom button
function zoomclickedcallback(~,~)
% Keep the zoom button state to on and change the select and pan
% button states to off
select_button.State = 'off';
zoom_button.State = 'on';
pan_button.State = 'off';
% Make the zoom enable on the figure
zoom_object = zoom(figure_object);
zoom_object.Enable = 'on';
% Set the zoom for the x-axis only on the mixture, background, and
% foreground signal axes
setAxesZoomConstraint(zoom_object,mixturesignal_axes,'x');
setAxesZoomConstraint(zoom_object,backgroundsignal_axes,'x');
setAxesZoomConstraint(zoom_object,foregroundsignal_axes,'x');
% Turn the pan off
pan off
end
% Clicked callback function for the pan button
function panclickedcallback(~,~)
% Keep the pan button state to on and change the select and zoom
% button states to off
select_button.State = 'off';
zoom_button.State = 'off';
pan_button.State = 'on';
% Turn the zoom off
zoom off
% Make the pan enable on the figure
pan_object = pan(figure_object);
pan_object.Enable = 'on';
% Set the pan for the x-axis only on the mixture, background, and
% foreground signal axes
setAxesPanConstraint(pan_object,mixturesignal_axes,'x');
setAxesPanConstraint(pan_object,backgroundsignal_axes,'x');
setAxesPanConstraint(pan_object,foregroundsignal_axes,'x');
end
% Close request callback function for the figure
function figurecloserequestfcn(~,~)
% If any audio is playing, stop it
if isplaying(mixture_player)
stop(mixture_player)
end
if isplaying(background_player)
stop(background_player)
end
if isplaying(foreground_player)
stop(foreground_player)
end
% Create question dialog box to close the figure
user_answer = questdlg('Close REPET GUI?',...
'Close REPET GUI','Yes','No','Yes');
switch user_answer
case 'Yes'
delete(figure_object)
case 'No'
return
end
end
end
% Read icon from Matlab
function image_data = iconread(icon_name)
% Read icon image from Matlab ([16x16x3] 16-bit PNG) and also return
% its transparency ([16x16] AND mask)
[image_data,~,image_transparency] ...
= imread(fullfile(matlabroot,'toolbox','matlab','icons',icon_name),'PNG');
% Convert the image to double precision (in [0,1])
image_data = im2double(image_data);
% Convert the 0's to NaN's in the image using the transparency
image_data(image_transparency==0) = NaN;
end
% Create play icon
function image_data = playicon
% Create the upper-half of a black play triangle with NaN's everywhere else
image_data = [nan(2,16);[nan(6,3),kron(triu(nan(6,5)),ones(1,2)),nan(6,3)]];
% Make the whole black play triangle image
image_data = repmat([image_data;image_data(end:-1:1,:)],[1,1,3]);
end
% Create stop icon
function image_data = stopicon
% Create a black stop square with NaN's everywhere else
image_data = nan(16,16);
image_data(4:13,4:13) = 0;
% Make the black stop square an image
image_data = repmat(image_data,[1,1,3]);
end
% Create REPET icon
function image_data = repeticon
% Create a matrix with NaN's
image_data = nan(16,16,1);
% Create black R, E, P, E, and T letters
image_data(2:8,2:3) = 0;
image_data([2,3,5,6],4) = 0;
image_data([3:5,7:8],5) = 0;
image_data(2:8,7:8) = 0;
image_data([2,3,5,7,8],9) = 0;
image_data([2,3,7,8],10) = 0;
image_data(10:16,2:3) = 0;
image_data([10,11,13,14],4) = 0;
image_data(11:13,5) = 0;
image_data(10:16,7:8) = 0;
image_data([10,11,13,15,16],9) = 0;
image_data([10,11,15,16],10) = 0;
image_data(10:11,12:15) = 0;
image_data(12:16,13:14) = 0;
% Make the image
image_data = repmat(image_data,[1,1,3]);
end
% Set a select line on an audio signal axes
function selectline(audiosignal_axes)
% Initialize the select line as an array for graphic objects (two lines and
% one patch)
select_line = gobjects(3,1);
% Add mouse-click callback function to the audio signal axes
audiosignal_axes.ButtonDownFcn = @audiosignalaxesbuttondownfcn;
% Mouse-click callback function for the audio signal axes
function audiosignalaxesbuttondownfcn(~,~)
% Location of the mouse pointer
current_point = audiosignal_axes.CurrentPoint;
% Plot limits from the audio signal axes' user data
plot_limits = audiosignal_axes.UserData.PlotXLim;
% If the current point is out of the plot limits, return
if current_point(1,1) < plot_limits(1) || current_point(1,1) > plot_limits(2) || ...
current_point(1,2) < -1 || current_point(1,2) > 1
return
end
% Current figure handle
figure_object = gcf;
% Mouse selection type
selection_type = figure_object.SelectionType;
% If click left mouse button
if strcmp(selection_type,'normal')
% If not empty, delete the select line
if ~isempty(select_line)
delete(select_line)
end
% Create a first line on the audio signal axes
color_value1 = 0.5*[1,1,1];
select_line(1) = line(audiosignal_axes, ...
current_point(1,1)*[1,1],[-1,1], ...
'Color',color_value1, ...
'ButtonDownFcn',@selectlinebuttondownfcn);
% Create a second line and a non-clickable patch with different
% colors and move them at the bottom of the current stack
color_value2 = 0.75*[1,1,1];
select_line(2) = line(audiosignal_axes, ...
current_point(1,1)*[1,1],[-1,1], ...
'Color',color_value2, ...
'ButtonDownFcn',@selectlinebuttondownfcn);
uistack(select_line(2),'bottom')
select_line(3) = patch(audiosignal_axes, ...
current_point(1,1)*[1,1,1,1],[-1,1,1,-1],color_value2, ...
'LineStyle','none', ...
'PickableParts','none');
uistack(select_line(3),'bottom')
% Change the pointer when the mouse moves over the lines, the
% audio signal axes, and the figure object
enterFcn = @(figure_handle, currentPoint) set(figure_handle,'Pointer','hand');
iptSetPointerBehavior(select_line(1),enterFcn);
iptSetPointerBehavior(select_line(2),enterFcn);
iptSetPointerBehavior(audiosignal_axes,enterFcn);
iptSetPointerBehavior(figure_object,enterFcn);
iptPointerManager(figure_object);
% Add window button motion and up callback functions to the
% figure
figure_object.WindowButtonMotionFcn = {@figurewindowbuttonmotionfcn,select_line(1)};
figure_object.WindowButtonUpFcn = @figurewindowbuttonupfcn;