136 lines
2.4 KiB
Objective-C
136 lines
2.4 KiB
Objective-C
//
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// OutputNode.m
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// Cog
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//
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// Created by Vincent Spader on 8/2/05.
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// Copyright 2005 Vincent Spader. All rights reserved.
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//
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#import "OutputNode.h"
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#import "OutputCoreAudio.h"
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#import "AudioPlayer.h"
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#import "BufferChain.h"
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#import "Logging.h"
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@implementation OutputNode
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- (void)setup
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{
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amountPlayed = 0.0;
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sampleRatio = 0.0;
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paused = YES;
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output = [[OutputCoreAudio alloc] initWithController:self];
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[output setup];
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}
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- (void)seek:(double)time
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{
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// [output pause];
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amountPlayed = time;
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}
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- (void)process
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{
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paused = NO;
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[output start];
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}
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- (void)pause
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{
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paused = YES;
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[output pause];
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}
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- (void)resume
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{
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paused = NO;
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[output resume];
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}
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- (int)readData:(void *)ptr amount:(int)amount
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{
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@autoreleasepool {
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int n;
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[self setPreviousNode:[[controller bufferChain] finalNode]];
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n = [super readData:ptr amount:amount];
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amountPlayed += (double)n * sampleRatio;
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if (endOfStream == YES && !n)
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{
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amountPlayed = 0.0;
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[controller endOfInputPlayed]; //Updates shouldContinue appropriately?
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}
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/* if (n == 0) {
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DLog(@"Output Buffer dry!");
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}
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*/
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return n;
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}
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}
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- (double)amountPlayed
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{
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return amountPlayed;
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}
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- (AudioStreamBasicDescription) format
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{
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return format;
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}
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- (void)setFormat:(AudioStreamBasicDescription *)f
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{
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format = *f;
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// Calculate a ratio and add to double(seconds) instead, as format may change
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double oldSampleRatio = sampleRatio;
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sampleRatio = 1.0 / (format.mSampleRate * format.mBytesPerPacket);
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BufferChain *bufferChain = [controller bufferChain];
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if (bufferChain)
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{
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ConverterNode *converter = [bufferChain converter];
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if (converter)
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{
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// This clears the resampler buffer, but not the input buffer
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// We also have to jump the play position ahead accounting for
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// the data we are flushing
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if (oldSampleRatio)
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amountPlayed += oldSampleRatio * [[converter buffer] bufferedLength];
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[converter setOutputFormat:format];
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[converter inputFormatDidChange:[bufferChain inputFormat]];
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}
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}
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}
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- (void)close
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{
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[output stop];
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}
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- (void)setVolume:(double) v
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{
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[output setVolume:v];
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}
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- (void)setShouldContinue:(BOOL)s
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{
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[super setShouldContinue:s];
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// if (s == NO)
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// [output stop];
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}
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- (BOOL)isPaused
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{
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return paused;
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}
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@end
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