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Building FM Radio with RDS Support

, 8 Jan 2009 Ms-PL
This article explains how to build a simple FM radio player with RDS support by using WPF and USBFM library
RadioPlayer.zip
RadioPlayer
RadioPlayer.suo
RadioPlayer
3rdParty
RotaryControl.dll
RotaryControl.pdb
USBFM.dll
USBFM.pdb
Properties
Settings.settings
<Window x:Class="RadioPlayer.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:c="clr-namespace:RotaryControl;assembly=RotaryControl"
    Title="USB Radio" Height="200" Width="500"
        WindowStartupLocation="CenterScreen"
        WindowStyle="None"
        AllowsTransparency="True"
        Background="Black"
        Foreground="White"  
        Loaded="Window_Loaded"
        Unloaded="Window_Unloaded"
        Closing="Window_Closing"
        PreviewMouseLeftButtonDown="Window_PreviewMouseLeftButtonDown"
        >
    <Window.Resources>
        <Style TargetType="TextBlock">
            <Setter Property="TextAlignment" Value="Center"/>
            <Setter Property="FontFamily" Value="{x:Static SystemFonts.SmallCaptionFontFamily}"/>
            <Setter Property="FontStyle" Value="{x:Static SystemFonts.SmallCaptionFontStyle}"/>
        </Style>
        <Style x:Key="LargeTextStyle" TargetType="TextBlock">
            <Setter Property="TextAlignment" Value="Center"/>
            <Setter Property="FontSize" Value="50"/>
        </Style>
        <Style x:Key="PTYTextStyle" TargetType="TextBlock">
            <Setter Property="TextAlignment" Value="Right"/>
            <Setter Property="FontSize" Value="10"/>
        </Style>
        <Style BasedOn="{StaticResource PTYTextStyle}" x:Key="IndiStyle" TargetType="TextBlock">
            <Setter Property="Margin" Value="5,0,5,0"/>
            <Setter Property="Foreground" Value="White"/>
            <Style.Triggers>
                <Trigger Property="IsEnabled" Value="False">
                    <Setter Property="Foreground" Value="Gray"/>
                </Trigger>
            </Style.Triggers>
        </Style>
        <Style TargetType="Button">
            <Setter Property="Foreground" Value="White"/>
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="Button">
                        <Border Height="25" Width="35" BorderThickness=".5" Background="Black" Name="PART_Border" >
                            <Border.BorderBrush>
                                <LinearGradientBrush EndPoint="0.854,0.854" StartPoint="0.146,0.146">
                                    <GradientStop Color="#FF262626" Offset="0"/>
                                    <GradientStop Color="#FFD7D7D7" Offset="1"/>
                                </LinearGradientBrush>
                            </Border.BorderBrush>
                            <ContentPresenter HorizontalAlignment="Center" SnapsToDevicePixels="True" Margin="0" MouseLeftButtonDown="Button_MouseLeftButtonDown"/>
                        </Border>
                        <ControlTemplate.Triggers>
                            <Trigger Property="IsPressed" Value="True">
                                <Setter Property="BorderBrush" TargetName="PART_Border">
                                    <Setter.Value>
                                        <LinearGradientBrush EndPoint="0.854,0.854" StartPoint="0.146,0.146">
                                            <GradientStop Color="#FF262626" Offset="1"/>
                                            <GradientStop Color="#FFD7D7D7" Offset="0"/>
                                        </LinearGradientBrush>
                                    </Setter.Value>
                                </Setter>
                            </Trigger>
                        </ControlTemplate.Triggers>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>
        <Style TargetType="{x:Type c:RotaryControl}">
            <Setter Property="SnapToSnapAngle" Value="False"/>
        </Style>
        <DataTemplate x:Key="PresetTemplate">
            <Button Content="{Binding}" />
        </DataTemplate>
        <Geometry x:Key="MonoGeometry">M0,0L1,2 2,2 2,4 1,4 0,6z</Geometry>
        <Geometry x:Key="StereoGeometry">M0,0L1,2 2,2 3,0 3,6 2,4 1,4 0,6z</Geometry>
        <DrawingBrush x:Key="SignalBrush" TileMode="Tile" Viewport="0,0,.3,.1" Stretch="Uniform">
            <DrawingBrush.Drawing>
                <DrawingGroup>
                    <GeometryDrawing Brush="Black">
                        <GeometryDrawing.Geometry>
                            <RectangleGeometry Rect="0,0,20,20"/>
                        </GeometryDrawing.Geometry>
                    </GeometryDrawing>
                    <GeometryDrawing Brush="White">
                        <GeometryDrawing.Geometry>
                            <RectangleGeometry Rect="0,20,20,40"/>
                        </GeometryDrawing.Geometry>
                    </GeometryDrawing>
                </DrawingGroup>
            </DrawingBrush.Drawing>
        </DrawingBrush>
    </Window.Resources>
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition Height="*"/>
            <RowDefinition Height="35px"/>
            <RowDefinition Height="Auto"/>
        </Grid.RowDefinitions>
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="Auto"/>
            <ColumnDefinition Width="*"/>
            <ColumnDefinition Width="Auto"/>
        </Grid.ColumnDefinitions>
        <c:RotaryControl Name="Volume" RotationIsConstrained="True"  ClockwiseMostAngle="340" Angle="340"/>
        <c:RotaryControl Name="Tune" Grid.Column="2"/>

        <TextBlock Text="Volume" Grid.Row="1"/>
        <TextBlock Text="Tune" Grid.Row="1" Grid.Column="2"/>

        <ListBox Name="Presets" ItemTemplate="{StaticResource PresetTemplate}" Grid.ColumnSpan="3" Grid.Row="2" Background="Transparent" HorizontalAlignment="Center" >
            <ListBox.ItemsPanel>
                <ItemsPanelTemplate>
                    <DockPanel Margin="0" IsItemsHost="True"/>
                </ItemsPanelTemplate>
            </ListBox.ItemsPanel>
        </ListBox>
        
        <Grid Grid.Column="1">
            <Grid.RowDefinitions>
                <RowDefinition Height="12px"/>
                <RowDefinition Height="*"/>
                <RowDefinition Height="20px"/>
                <RowDefinition Height="20px"/>
            </Grid.RowDefinitions>
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width=".2*"/>
                <ColumnDefinition Width="*"/>
            </Grid.ColumnDefinitions>
            <TextBlock Name="Freq" Grid.Column="1" Grid.Row="0" Grid.RowSpan="2" Style="{StaticResource LargeTextStyle}"/>
            <TextBlock Name="PS" Grid.Column="1" Grid.Row="2"/>
            <TextBlock Name="PTY" Grid.Column="1" Grid.Row="0" Style="{StaticResource PTYTextStyle}"/>
            <Path Name="MonoStereo" Stroke="White" Fill="White" Stretch="Fill" Grid.Column="1" Grid.Row="0" Width="12" Height="12" HorizontalAlignment="Left"/>
            <Rectangle Grid.RowSpan="4" Fill="{StaticResource SignalBrush}" Margin="10"/>
            <Rectangle Grid.RowSpan="4" Fill="Black" Margin="9" RenderTransformOrigin="0.5,0">
                <Rectangle.RenderTransform>
                    <ScaleTransform x:Name="SignalTransform" ScaleX="1"/>
                </Rectangle.RenderTransform>
            </Rectangle>
            <StackPanel Grid.Column="1" Grid.Row="4" HorizontalAlignment="Right" Orientation="Horizontal">
                <TextBlock Style="{StaticResource IndiStyle}" Text="MS" Name="MS"/>
                <TextBlock Style="{StaticResource IndiStyle}" Text="TA" Name="TA"/>
                <TextBlock Style="{StaticResource IndiStyle}" Text="TP" Name="TP"/>
            </StackPanel>
        </Grid>
    </Grid>
</Window>

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License

This article, along with any associated source code and files, is licensed under The Microsoft Public License (Ms-PL)

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About the Author

Tamir Khason
Architect Better Place
Israel Israel
Hello! My name is Tamir Khason, and I am software architect, project manager, system analyst and [of course] programmer. In addition to writing big amount of documentation, I also write code, a lot of code. I used to work as a freelance architect, project manager, trainer, and consultant here, in Israel, but recently join the company with extremely persuasive idea - to make a world better place. I have very pretty wife and 3 charming kids, but unfortunately almost no time for them.
 
To be updated within articles, I publishing, visit my blog or subscribe RSS feed. Also you can follow me on Twitter to be up to date about my everyday life.

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