1 简介
本文结合"数字信号处理"课程和"Matlab程序设计"课程的相关知识,给出了基于Matlab的音乐播放器的总体设计方案,介绍了播放器主要模块的功能,设计与实现方法.我们将该设计作为电子信息类专业数字信号处理课程设计项目,有助于激发学生的学习兴趣,提高其综合设计和应用创新能力.
2 部分代码
function varargout = untitled(varargin)
% UNTITLED M-file for untitled.fig
% UNTITLED, by itself, creates a new UNTITLED or raises the existing
% singleton*.
%
% H = UNTITLED returns the handle to a new UNTITLED or the handle to
% the existing singleton*.
%
% UNTITLED('CALLBACK',hObject,eventData,handles,...) calls the local
% function named CALLBACK in UNTITLED.M with the given input arguments.
%
% UNTITLED('Property','Value',...) creates a new UNTITLED or raises the
% existing singleton*. Starting from the left, property value pairs ar
% applied to the GUI before untitled_OpeningFcn gets called. An
% unrecognized property name or invalid value makes property application
% stop. All inputs are passed to untitled_OpeningFcn via varargin.
%
% *See GUI Options on GUIDE's Tools menu. Choose "GUI allows only one
% instance to run (singleton)".
%
% See also: GUIDE, GUIDATA, GUIHANDLES
% Edit the above text to modify the response to help untitled
% Last Modified by GUIDE v2.5 02-Jun-2021 00:03:55
% Begin initialization code - DO NOT EDIT
gui_Singleton = 1;
gui_State = struct('gui_Name', mfilename, ...
'gui_Singleton', gui_Singleton, ...
'gui_OpeningFcn', @untitled_OpeningFcn, ...
'gui_OutputFcn', @untitled_OutputFcn, ...
'gui_LayoutFcn', [] , ...
'gui_Callback', []);
if nargin && ischar(varargin{1})
gui_State.gui_Callback = str2func(varargin{1});
end
if nargout
[varargout{1:nargout}] = gui_mainfcn(gui_State, varargin{:});
else
gui_mainfcn(gui_State, varargin{:});
end
% End initialization code - DO NOT EDIT
% --- Executes just before untitled is made visible.
function untitled_OpeningFcn(hObject, eventdata, handles, varargin)
% This function has no output args, see OutputFcn.
% hObject handle to figure
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% varargin command line arguments to untitled (see VARARGIN)
if ~isempty(timerfindall), stop(timerfindall); delete(timerfindall);end
ed until after all CreateFcns called
% Hint: popupmenu controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
set(hObject,'Value',handles.clockSaveData(2));
handles.popupmenu2=hObject;
guidata(hObject,handles);
function edit_musicFile_Callback(hObject, eventdata, handles)
% hObject handle to edit_musicFile (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
% Hints: get(hObject,'String') returns contents of edit_musicFile as text
% str2double(get(hObject,'String')) returns contents of edit_musicFile as a double
handles.musicSaveData=get(hObject,'String');
musicSaveData=handles.musicSaveData;
save('musicSaveData.txt','-ascii','musicSaveData');
guidata(hObject,handles);
% --- Executes during object creation, after setting all properties.
function edit_musicFile_CreateFcn(hObject, eventdata, handles)
% hObject handle to edit_musicFile (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
% Hint: edit controls usually have a white background on Windows.
% See ISPC and COMPUTER.
if ispc && isequal(get(hObject,'BackgroundColor'), get(0,'defaultUicontrolBackgroundColor'))
set(hObject,'BackgroundColor','white');
end
set(hObject,'String',handles.musicSaveData);
handles.edit_musicFile=hObject;
guidata(hObject,handles);
% --- Executes during object creation, after setting all properties.
function pushbutton1_CreateFcn(hObject, eventdata, handles)
% hObject handle to pushbutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
handles.pushbutton1=hObject;
guidata(hObject,handles);
% --- Executes during object creation, after setting all properties.
function radiobutton1_CreateFcn(hObject, eventdata, handles)
% hObject handle to radiobutton1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
handles.radiobutton1=hObject;
guidata(hObject,handles);
% --- Executes during object creation, after setting all properties.
function radiobutton2_CreateFcn(hObject, eventdata, handles)
% hObject handle to radiobutton2 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
handles.radiobutton2=hObject;
guidata(hObject,handles);
% --- Executes when selected object is changed in uipanel4.
function uipanel4_SelectionChangeFcn(hObject, eventdata, handles)
% hObject handle to the selected object in uipanel4
% eventdata structure with the following fields (see UIBUTTONGROUP)
% EventName: string 'SelectionChanged' (read only)
% OldValue: handle of the previously selected object or empty if none was selected
% NewValue: handle of the currently selected object
% handles structure with handles and user data (see GUIDATA)
clockSaveData=handles.clockSaveData;
if isequal(get(hObject,'Tag'),get(gethandles.radiobutton1,'Tag'))
clockSavaData(3)=1-get(hObject,'Value');
else
clockSaveData(3)=get(hObject,'Value');
end
save('clockSaveData.txt','-ascii','clockSaveData');
% --- Executes during object creation, after setting all properties.
function figure1_CreateFcn(hObject, eventdata, handles)
% hObject handle to figure1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
set(hObject,'name','音乐闹钟');
if exist('clockSaveData.txt','file')
clockSaveData=load('clockSaveData.txt');
if numel(clockSaveData)~=3
clockSaveData=[13,1,0];
save('clockSaveData.txt','-ascii','clockSaveData')
end
else
clockSaveData=[13,1,0];
save('clockSaveData.txt','-ascii','clockSaveData')
end
if exist('musicSaveData.txt','file')
musicSaveData=char(load('musicSaveData.txt'));
else
musicSaveData='设定音乐文件';
save('musicSaveData.txt','-ascii','musicSaveData')
end
handles.clockSaveData=clockSaveData;
handles.musicSaveData=musicSaveData;
handles.figure1=hObject;
guidata(hObject,handles);
% --- Executes during object creation, after setting all properties.
function uipanel3_CreateFcn(hObject, eventdata, handles)
% hObject handle to uipanel3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
handles.uipanel3=hObject;
guidata(hObject,handles);
function start_timer(handles)
contents=cellstr(get(handles.popupmenu1,'String'));
hour=contents{get(handles.popupmenu1,'Value')};
hour=str2double(hour);
contents=cellstr(get(handles.popupmenu2,'String'));
minute=contents{get(handles.popupmenu2,'Value')};
minute=str2double(minute);
startTime=datevec(now);%时间矢量为【年，月，日，时，分，秒】
if hour>startTime(4)
startTime(4:6)=[hour,minute,0];
elseif hour==startTime(4)
if minute>startTime(5)
startTime(5:6)=[minute,0];
else
startTime(3:6)=[startTime(3)+1,hour,minute,0];
end
else
startTime(3:6)=[startTime(3)+1,hour,minute,0];
end
stop(handles.timer);
startat(handles.timer,startTime);
function start_timer_solid_hour(handles)
startTime=datevec(now);
startTime(4:6)=[startTime(4)+1,0,0];
stop(handles.timer);
startat(handles.timer,startTime);
function timer_action(timerObj,evendata,handles)
if (get(handles.radiobutton1,'Value')==1 && get(handles.checkbox1,'Value')==1)
% --- Executes on button press in checkbox1.
function checkbox1_Callback(hObject, eventdata, handles)
handles.checkbox1=hObject;
guidata(hObject,handles);
if (get(handles.checkbox1,'Value')==1)%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！！
start_timer_solid_hour(handles);
else
start_timer(handles);
end
% --- Executes during object creation, after setting all properties.
function checkbox1_CreateFcn(hObject, eventdata, handles)
% hObject handle to checkbox1 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
handles.checkbox1=hObject;
guidata(hObject,handles);
% --- Executes on button press in pushbutton3.
function pushbutton3_Callback(hObject, eventdata, handles)
% hObject handle to pushbutton3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles structure with handles and user data (see GUIDATA)
[filename,pathname]=uigetfile(...
{'*.jpg;*.bmp;*.tif','可选择';},'选择背景图片','MultiSelect','off');
%handles.musicSaveData=fullfile(pathname,filename);
selected_figure=fullfile(pathname,filename);
ha=axes('units','normalized','position',[0 0 1 1]);
uistack(ha,'down')
II=imread(selected_figure);
image(II)
colormap gray
set(ha,'handlevisibility','off','visible','off');
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%@@
%set(handles.edit_musicFile,'String',handles.musicSaveData);
%musicSaveData=handles.musicSaveData;
%save('musicSaveData.txt','-ascii','musicSaveData');
handles.pushbutton3=hObject;%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
guidata(hObject,handles);
% --- Executes during object creation, after setting all properties.
function pushbutton3_CreateFcn(hObject, eventdata, handles)
% hObject handle to pushbutton3 (see GCBO)
% eventdata reserved - to be defined in a future version of MATLAB
% handles empty - handles not created until after all CreateFcns called
handles.pushbutton3=hObject;
guidata(hObject,handles);
3 仿真结果
4 参考文献
[1]韩萍, 周航, 金昌旺. 基于Matlab的音乐播放器设计[J]. 电气电子教学学报, 2012, 34(4):4.
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