/*

 File: SoundAdditions.m

 Abstract: These category methods prepare the receiver to play into

           the iChat Theater audio device if it is available. The

           -[NSSound setChannelMapping:] method is necessary to map

           the audio channels of the sound with those of the iChat

           Theater session.

 Version: 2.0

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 */

#import "SoundAdditions.h"

#import <InstantMessage/IMAVManager.h>

@implementation NSSound (iChatTheaterAdditions)

- (BOOL) playMonoForiChat:(BOOL)flag {

    if (flag) {

        // Set the audio output device.

        IMAVManager *avManager = [IMAVManager sharedAVManager];

        [self setPlaybackDeviceIdentifier:[avManager audioDeviceUID]];

        // Get the channel info for iChat Theater.

        NSArray *channels = [avManager audioDeviceChannels];

        NSUInteger channelCount = [channels count];

        // For a mono sound, map its single channel to those of the IMAVManager (whether mono or stereo).

        NSArray *mapping = (channelCount > 0) ? [NSArray arrayWithObject:channels] : nil;

        [self setChannelMapping:mapping];

    } else {

        // Use default playback device and channel mapping.

        [self setPlaybackDeviceIdentifier:nil];

        [self setChannelMapping:nil];

    }

    return [self play];

}

- (BOOL) playStereoForiChat:(BOOL)flag {

    if (flag) {

        // Set the audio output device.

        IMAVManager *avManager = [IMAVManager sharedAVManager];

        [self setPlaybackDeviceIdentifier:[avManager audioDeviceUID]];

        // Get the channel info for iChat Theater.

        NSArray *channels = [avManager audioDeviceChannels];

        NSUInteger channelCount = [channels count];

        if (channelCount == 2) {

            // Map each channel directly.

            [self setChannelMapping:channels];

        } else if (channelCount == 1) {

            // Map both channels to the same single channel in iChat Theater.

            NSNumber *channel = [channels lastObject];

            [self setChannelMapping:[NSArray arrayWithObjects:channel, channel, nil]];

        } else {

            // No mapping (iChat Theater is not running).

            [self setChannelMapping:nil];

        }

    } else {

        // Use default playback device and channel mapping.

        [self setPlaybackDeviceIdentifier:nil];

        [self setChannelMapping:nil];

    }

    return [self play];

}

@end