cog/Audio/Chain/OutputNode.m

113 lines
1.5 KiB
Objective-C

//
// OutputNode.m
// Cog
//
// Created by Vincent Spader on 8/2/05.
// Copyright 2005 Vincent Spader. All rights reserved.
//
#import "OutputNode.h"
#import "OutputCoreAudio.h"
#import "AudioPlayer.h"
#import "BufferChain.h"
@implementation OutputNode
- (void)setup
{
amountPlayed = 0;
output = [[OutputCoreAudio alloc] initWithController:self];
[output setup];
}
- (void)seek:(double)time
{
// [output pause];
amountPlayed = time*format.mBytesPerFrame*(format.mSampleRate);
}
- (void)process
{
[output start];
}
- (void)pause
{
[output pause];
}
- (void)resume
{
[output resume];
}
- (int)readData:(void *)ptr amount:(int)amount
{
NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
int n;
[self setPreviousNode:[[controller bufferChain] finalNode]];
n = [super readData:ptr amount:amount];
if (endOfStream == YES)
{
amountPlayed = 0;
[controller endOfInputPlayed]; //Updates shouldContinue appropriately?
}
/* if (n == 0) {
NSLog(@"Output Buffer dry!");
}
*/
amountPlayed += n;
[pool release];
return n;
}
- (double)amountPlayed
{
return (amountPlayed/format.mBytesPerFrame)/(format.mSampleRate);
}
- (AudioStreamBasicDescription) format
{
return format;
}
- (void)setFormat:(AudioStreamBasicDescription *)f
{
format = *f;
}
- (void)close
{
[output stop];
}
- (void)dealloc
{
[output release];
[super dealloc];
}
- (void)setVolume:(double) v
{
[output setVolume:v];
}
- (void)setShouldContinue:(BOOL)s
{
[super setShouldContinue:s];
// if (s == NO)
// [output stop];
}
@end