In: Categories » Computers and technology » Flash » Detecting the Audio Device Capabilities using Flash Scripting
|
You want to determine the audio capabilities of the device on which the Player is running. Use the hasAudio and hasMP3 properties of the System.capabilities object. Desktop versions of Flash Player 6 and later support MP3 playback and the ability to encode audio from a microphone or similar device. However, Flash Players for other devices do not necessarily support all, or possibly any, audio capabilities. The System.capabilities.hasAudio property returns true if the Player has any audio capabilities and false otherwise. This is extremely important for playing movies on multiple devices. If a device has no audio support, you should avoid forcing users to download something they cannot hear (especially because audio can be quite large): // Load a .swf containing sound only if the Player can play audio.
if (System.capabilities.hasAudio) {
mySoundHolder.loadMovie("sound.swf");
} else {
mySoundHolder.loadMovie("silent.swf");
}
Just because a Player has audio capabilities, however, does not necessarily mean that it can play back MP3 sounds. Therefore, if publishing MP3 content, you should test for MP3 capabilities using the System.capabilities.hasMP3 property. MP3 sounds are preferable, if supported, because they offer better sound-quality-to-file-size ratios than ADCP sounds. // If the Player can play MP3s, load an MP3 using a Sound object. Otherwise, load a
// .swf containing ADCP sound into a nested movie clip.
if (System.capabilities.hasMP3) {
mySound = new Sound(mySoundHolder);
mySound.load("sound.mp3", false);
} else {
mySoundHolder("adcpSound.swf");
}
It is important to understand that the hasAudio and hasMP3 property settings are based on the capabilities of the Player and not of the system on which the Player is running. The desktop system players (for Windows, Mac OS, and Linux) always return true for both properties regardless of whether the system actually has the hardware (i.e., soundcard and speakers) to play back sounds. However, players for other devices may return false if the device does not support the audio or MP3 features
|
legal disclaimer
1) Our website is not responsible for the information contained by this article as well for any and all copyright infringements by authors and writers. E-articles is a free information resource. If you suspect this article for any copyright infringements, please read the Terms of service and contact us to investigate the problem.
2) The E-articles directory team is not responsible for inaccuracies, falsehoods, or any other types of misinformation this tutorial may contain and will not be liable for any loss or damage suffered by a user through the user's reliance on the information gained here. Please read the Terms of service
Useful tools and features
If you like this article (tutorial), please link to it from your web page using the information above. Linking to this page, this is the only way to help us improve our service, the same time providing your visitors with a way to improve their online experience.
related articles
Use the beginGradientFill( ) and endFill( ) methods to initiate and close a shape drawn at runtime. In a gradient fill, there is a graded change in colors. Flash supports linear gradients, in which one color fades into the next from left to right. Flash also supports radial gradients, in which the colors radiate out from a center point. You can initiate a gradient-filled shape using beginGradientFill( ) in the same way you initiate a solid-filled shape with beginFill( ). The difference is that the call to beginGradientFill( ) require...
2. Scripting Masks in Flash
Use the Drawing API to create a shape and then use MovicClip.setMask( ) to apply the mask. Masks can be used to create unique shapes or visual effects. For example, you can use masks to create wipes and transitions or interesting animations in which only the masked portion of the artwork is visible at a given time. You can even create masks that change shape over time, and use them to mask bitmapped graphics (in movie clips). You can use any movie clip as a mask of another movie clip using the setMask( ) method. The setMask( ...
3. Drawing a Triangle using ActionScript
Create a custom MovieClip.drawTriangle( ) method using the Drawing API and invoke it on a movie clip. You can determine and plot the vertices of a triangle given the lengths of two sides and the angle between them. This is a better approach than specifying the lengths of the three sides because knowing the lengths of two sides and the angle between them always determines a triangle, whereas three arbitrary sides may not fit together to make a triangle. The custom drawTriangle( ) method accepts six parameters: ab ...
4. ActionScript: Filling a Shape with a Solid or Translucent Color
Use the beginFill( ) and endFill( ) methods to initiate and close a shape drawn at runtime. To draw a filled shape, call beginFill( ) prior to any other drawing methods, including the custom methods you have defined such as drawCircle( ) and drawPolygon( ). Invoke endFill( ) after calling other drawing methods to create the shape. You cannot apply a fill to an existing shape drawn at authoring time or runtime. You must invoke beginFill( ) before drawing the shape to be filled. This example creates a solid blue ...
Create a custom MovieClip.drawSimpleRectangle( ) method using the Drawing API and invoke it on a movie clip. To draw a simple rectangle, specify the stroke's attributes using the lineStyle( ) method and then draw four lines using the lineTo( ) method: // Create rectangle_mc with a depth of 1 on the main timeline. _root.createEmptyMovieClip("rectangle_mc", 1); // Specify a one-pixel, solid, black line. rectangle_mc.lineStyle(1, 0x000000, 100); // Draw four lines to form the perimeter ...
6. How to draw a rectangle with rounded corners
You want to draw a rectangle with rounded corners, an offset, or rotation.Create a custom MovieClip.drawRectangle( ) method using the Drawing API and invoke it on a movie clip. The drawSimpleRectangle( ) method is, as the name suggests, quite simple. Let's create a more complex version that also: Draws a rectangle with a specified angle of rotation Let's you specify the rectangle center's coordinates Can draw a rectangle with rounded corners The drawRectangle( ) method accepts...
7. Reusing and Organizing Code in Flash Movies
You want to reuse code that you've created for one project in another Flash movie. Or you want to write your ActionScript code in an external text editor. Place your ActionScript code in external .as files and use the #include directive to add them to your Flash movies: // Adds all the code within MyActionScriptFile.as to your Flash movie. #include "MyActionScriptFile.as" Use the #include directive to incorporate code from external text files into your Flash movie during compilation from a .fla file ...
8. Drawing a Circle using ActionScript
Create a custom MovieClip.drawCircle( ) method using the Drawing API and invoke it on a movie clip. You can create a circle in ActionScript with eight curves. Fewer curves results in a distorted circle and too many curves hinders performance. Let's create a custom method of the MovieClip class for drawing circles. This method, drawCircle( ), allows for three parameters: radius The radius of the circle x The x coordinate of the circle's center point. If undefined, the circle is centered at x =...
9. ActionScript: Repeating a Task at Timed Intervals
You want to perform an action or actions at a specific timed interval. Use the setInterval( ) function. The setInterval( ) function allows you to specify an interval (in milliseconds) at which your Flash movie will invoke a function. Use setInterval( ) to perform a particular action over time but not necessarily at the frequency of the frame rate of the movie. // Define a function. function myIntervalFunction ( ) { // Output the difference between the current timer value and its value from the ...
10. Mouse Location Flash Script
Not only can you get the location of a movie clip on the screen, you can even get the location of the mouse, also known as the cursor. What is the difference between the mouse and the cursor? The mouse is the physical device attached to your computer. You may even have a track pad or tablet instead. The cursor is the graphic that moves around the screen as you move your mouse. So, technically, cursor is the term I should be using here. However, ActionScript uses the term mouse in its keywords. I will therefore use mouse and cursor i...