cog/Audio/AudioPlayer.m

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// AudioController.m
// Cog
//
// Created by Vincent Spader on 8/7/05.
// Copyright 2005 Vincent Spader. All rights reserved.
//
#import "AudioPlayer.h"
#import "BufferChain.h"
#import "Helper.h"
#import "OutputNode.h"
#import "PluginController.h"
#import "Status.h"
#import "Logging.h"
@implementation AudioPlayer
- (id)init {
self = [super init];
if(self) {
output = NULL;
bufferChain = nil;
outputLaunched = NO;
endOfInputReached = NO;
chainQueue = [[NSMutableArray alloc] init];
semaphore = [[Semaphore alloc] init];
atomic_init(&resettingNow, false);
atomic_init(&refCount, 0);
}
return self;
}
- (void)setDelegate:(id)d {
delegate = d;
}
- (id)delegate {
return delegate;
}
- (void)play:(NSURL *)url {
[self play:url withUserInfo:nil withRGInfo:nil startPaused:NO andSeekTo:0.0];
}
- (void)play:(NSURL *)url withUserInfo:(id)userInfo withRGInfo:(NSDictionary *)rgi {
[self play:url withUserInfo:userInfo withRGInfo:rgi startPaused:NO andSeekTo:0.0];
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}
- (void)play:(NSURL *)url withUserInfo:(id)userInfo withRGInfo:(NSDictionary *)rgi startPaused:(BOOL)paused {
[self play:url withUserInfo:userInfo withRGInfo:rgi startPaused:paused andSeekTo:0.0];
}
- (void)play:(NSURL *)url withUserInfo:(id)userInfo withRGInfo:(NSDictionary *)rgi startPaused:(BOOL)paused andSeekTo:(double)time {
ALog(@"Opening file for playback: %@ at seek offset %f%@", url, time, (paused) ? @", starting paused" : @"");
[self waitUntilCallbacksExit];
if(output) {
[output setShouldContinue:NO];
[output close];
}
if(!output) {
output = [[OutputNode alloc] initWithController:self previous:nil];
}
[output setup];
[output setVolume:volume];
@synchronized(chainQueue) {
for(id anObject in chainQueue) {
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[anObject setShouldContinue:NO];
}
[chainQueue removeAllObjects];
endOfInputReached = NO;
if(bufferChain) {
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[bufferChain setShouldContinue:NO];
bufferChain = nil;
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}
}
bufferChain = [[BufferChain alloc] initWithController:self];
[self notifyStreamChanged:userInfo];
while(![bufferChain open:url withUserInfo:userInfo withRGInfo:rgi]) {
bufferChain = nil;
[self requestNextStream:userInfo];
url = nextStream;
if(url == nil) {
return;
}
userInfo = nextStreamUserInfo;
rgi = nextStreamRGInfo;
[self notifyStreamChanged:userInfo];
bufferChain = [[BufferChain alloc] initWithController:self];
}
if(time > 0.0) {
[output seek:time];
[bufferChain seek:time];
}
[self setShouldContinue:YES];
outputLaunched = NO;
startedPaused = paused;
initialBufferFilled = NO;
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[bufferChain launchThreads];
if(paused)
[self setPlaybackStatus:CogStatusPaused waitUntilDone:YES];
}
- (void)stop {
// Set shouldoContinue to NO on all things
[self setShouldContinue:NO];
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[self setPlaybackStatus:CogStatusStopped waitUntilDone:YES];
@synchronized(chainQueue) {
for(id anObject in chainQueue) {
[anObject setShouldContinue:NO];
}
[chainQueue removeAllObjects];
endOfInputReached = NO;
if(bufferChain) {
bufferChain = nil;
}
}
if(output) {
[output setShouldContinue:NO];
[output close];
}
output = nil;
}
- (void)pause {
[output pause];
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[self setPlaybackStatus:CogStatusPaused waitUntilDone:YES];
}
- (void)resume {
if(startedPaused) {
startedPaused = NO;
if(initialBufferFilled)
[self launchOutputThread];
}
[output resume];
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[self setPlaybackStatus:CogStatusPlaying waitUntilDone:YES];
}
- (void)seekToTime:(double)time {
if(endOfInputReached) {
// This is a dirty hack in case the playback has finished with the track
// that the user thinks they're seeking into
CogStatus status = (CogStatus)currentPlaybackStatus;
NSURL *url;
id userInfo;
NSDictionary *rgi;
@synchronized(chainQueue) {
url = [bufferChain streamURL];
userInfo = [bufferChain userInfo];
rgi = [bufferChain rgInfo];
}
[self stop];
[self play:url withUserInfo:userInfo withRGInfo:rgi startPaused:(status == CogStatusPaused) andSeekTo:time];
} else {
// Still decoding the current file, safe to seek within it
[output seek:time];
[bufferChain seek:time];
}
}
- (void)setVolume:(double)v {
volume = v;
[output setVolume:v];
}
- (double)volume {
return volume;
}
// This is called by the delegate DURING a requestNextStream request.
- (void)setNextStream:(NSURL *)url {
[self setNextStream:url withUserInfo:nil withRGInfo:nil];
}
- (void)setNextStream:(NSURL *)url withUserInfo:(id)userInfo withRGInfo:(NSDictionary *)rgi {
nextStream = url;
nextStreamUserInfo = userInfo;
nextStreamRGInfo = rgi;
}
// Called when the playlist changed before we actually started playing a requested stream. We will re-request.
- (void)resetNextStreams {
[self waitUntilCallbacksExit];
@synchronized(chainQueue) {
for(id anObject in chainQueue) {
[anObject setShouldContinue:NO];
}
[chainQueue removeAllObjects];
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if(endOfInputReached) {
[self endOfInputReached:bufferChain];
}
}
}
- (void)restartPlaybackAtCurrentPosition {
[self sendDelegateMethod:@selector(audioPlayer:restartPlaybackAtCurrentPosition:) withObject:[bufferChain userInfo] waitUntilDone:NO];
}
- (void)pushInfo:(NSDictionary *)info toTrack:(id)userInfo {
[self sendDelegateMethod:@selector(audioPlayer:pushInfo:toTrack:) withObject:info withObject:userInfo waitUntilDone:NO];
}
- (void)reportPlayCountForTrack:(id)userInfo {
[self sendDelegateMethod:@selector(audioPlayer:reportPlayCountForTrack:) withObject:userInfo waitUntilDone:NO];
}
- (void)setShouldContinue:(BOOL)s {
shouldContinue = s;
if(bufferChain)
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[bufferChain setShouldContinue:s];
if(output)
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[output setShouldContinue:s];
}
- (double)amountPlayed {
return [output amountPlayed];
}
- (double)amountPlayedInterval {
return [output amountPlayedInterval];
}
- (void)launchOutputThread {
initialBufferFilled = YES;
if(outputLaunched == NO && startedPaused == NO) {
[self setPlaybackStatus:CogStatusPlaying];
[output launchThread];
outputLaunched = YES;
}
}
- (void)requestNextStream:(id)userInfo {
[self sendDelegateMethod:@selector(audioPlayer:willEndStream:) withObject:userInfo waitUntilDone:YES];
}
- (void)notifyStreamChanged:(id)userInfo {
[self sendDelegateMethod:@selector(audioPlayer:didBeginStream:) withObject:userInfo waitUntilDone:YES];
}
- (void)notifyPlaybackStopped:(id)userInfo {
[self sendDelegateMethod:@selector(audioPlayer:didStopNaturally:) withObject:userInfo waitUntilDone:NO];
}
- (void)beginEqualizer:(AudioUnit)eq {
[self sendDelegateMethod:@selector(audioPlayer:displayEqualizer:) withVoid:eq waitUntilDone:YES];
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}
- (void)refreshEqualizer:(AudioUnit)eq {
[self sendDelegateMethod:@selector(audioPlayer:refreshEqualizer:) withVoid:eq waitUntilDone:YES];
}
- (void)endEqualizer:(AudioUnit)eq {
[self sendDelegateMethod:@selector(audioPlayer:removeEqualizer:) withVoid:eq waitUntilDone:NO];
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}
- (void)addChainToQueue:(BufferChain *)newChain {
[newChain setShouldContinue:YES];
[newChain launchThreads];
[chainQueue insertObject:newChain atIndex:[chainQueue count]];
}
- (BOOL)endOfInputReached:(BufferChain *)sender // Sender is a BufferChain
{
BufferChain *newChain = nil;
if(atomic_load_explicit(&resettingNow, memory_order_relaxed))
return YES;
atomic_fetch_add(&refCount, 1);
@synchronized(chainQueue) {
// No point in constructing new chain for the next playlist entry
// if there's already one at the head of chainQueue... r-r-right?
for(BufferChain *chain in chainQueue) {
if([chain isRunning]) {
atomic_fetch_sub(&refCount, 1);
return YES;
}
}
// We don't want to do this, it may happen with a lot of short files
// if ([chainQueue count] >= 5)
//{
// return YES;
//}
}
double duration = 0.0;
@synchronized(chainQueue) {
for(BufferChain *chain in chainQueue) {
duration += [chain secondsBuffered];
}
}
while(duration >= 30.0 && shouldContinue) {
[semaphore wait];
if(atomic_load_explicit(&resettingNow, memory_order_relaxed)) {
atomic_fetch_sub(&refCount, 1);
return YES;
}
@synchronized(chainQueue) {
duration = 0.0;
for(BufferChain *chain in chainQueue) {
duration += [chain secondsBuffered];
}
}
}
nextStreamUserInfo = [sender userInfo];
nextStreamRGInfo = [sender rgInfo];
// This call can sometimes lead to invoking a chainQueue block on another thread
[self requestNextStream:nextStreamUserInfo];
if(!nextStream) {
atomic_fetch_sub(&refCount, 1);
return YES;
}
@synchronized(chainQueue) {
newChain = [[BufferChain alloc] initWithController:self];
endOfInputReached = YES;
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BufferChain *lastChain = [chainQueue lastObject];
if(lastChain == nil) {
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lastChain = bufferChain;
}
BOOL pathsEqual = NO;
if([nextStream isFileURL] && [[lastChain streamURL] isFileURL]) {
NSString *unixPathNext = [nextStream path];
NSString *unixPathPrev = [[lastChain streamURL] path];
if([unixPathNext isEqualToString:unixPathPrev])
pathsEqual = YES;
}
if(pathsEqual || ([[nextStream scheme] isEqualToString:[[lastChain streamURL] scheme]] && (([nextStream host] == nil && [[lastChain streamURL] host] == nil) || [[nextStream host] isEqualToString:[[lastChain streamURL] host]]) && [[nextStream path] isEqualToString:[[lastChain streamURL] path]])) {
if([lastChain setTrack:nextStream] && [newChain openWithInput:[lastChain inputNode] withUserInfo:nextStreamUserInfo withRGInfo:nextStreamRGInfo]) {
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[newChain setStreamURL:nextStream];
[self addChainToQueue:newChain];
DLog(@"TRACK SET!!! %@", newChain);
// Keep on-playin
newChain = nil;
atomic_fetch_sub(&refCount, 1);
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return NO;
}
}
lastChain = nil;
while(shouldContinue && ![newChain open:nextStream withUserInfo:nextStreamUserInfo withRGInfo:nextStreamRGInfo]) {
if(nextStream == nil) {
newChain = nil;
atomic_fetch_sub(&refCount, 1);
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return YES;
}
newChain = nil;
[self requestNextStream:nextStreamUserInfo];
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newChain = [[BufferChain alloc] initWithController:self];
}
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[self addChainToQueue:newChain];
newChain = nil;
// I'm stupid and can't hold too much stuff in my head all at once, so writing it here.
//
// Once we get here:
// - buffer chain for previous stream finished reading
// - there are (probably) some bytes of the previous stream in the output buffer which haven't been played
// (by output node) yet
// - self.bufferChain == previous playlist entry's buffer chain
// - self.nextStream == next playlist entry's URL
// - self.nextStreamUserInfo == next playlist entry
// - head of chainQueue is the buffer chain for the next entry (which has launched its threads already)
}
atomic_fetch_sub(&refCount, 1);
return YES;
}
- (void)reportPlayCount {
if(bufferChain) {
[self reportPlayCountForTrack:[bufferChain userInfo]];
}
}
- (BOOL)selectNextBuffer {
BOOL signalStopped = NO;
do {
@synchronized(chainQueue) {
endOfInputReached = NO;
if([chainQueue count] <= 0) {
// End of playlist
signalStopped = YES;
break;
}
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bufferChain = nil;
bufferChain = [chainQueue objectAtIndex:0];
[chainQueue removeObjectAtIndex:0];
DLog(@"New!!! %@ %@", bufferChain, [[bufferChain inputNode] decoder]);
[semaphore signal];
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}
} while(0);
if(signalStopped) {
double latency = 0;
if(output) latency = [output latency];
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, latency * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
[self stop];
self->bufferChain = nil;
[self notifyPlaybackStopped:nil];
});
return YES;
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}
[output setEndOfStream:NO];
return NO;
}
- (void)endOfInputPlayed {
// Once we get here:
// - the buffer chain for the next playlist entry (started in endOfInputReached) have been working for some time
// already, so that there is some decoded and converted data to play
// - the buffer chain for the next entry is the first item in chainQueue
[self notifyStreamChanged:[bufferChain userInfo]];
}
- (BOOL)chainQueueHasTracks {
@synchronized(chainQueue) {
return [chainQueue count] > 0;
}
return NO;
}
- (void)sendDelegateMethod:(SEL)selector withVoid:(void *)obj waitUntilDone:(BOOL)wait {
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[delegate methodSignatureForSelector:selector]];
[invocation setTarget:delegate];
[invocation setSelector:selector];
[invocation setArgument:(void *)&self atIndex:2];
[invocation setArgument:&obj atIndex:3];
[invocation retainArguments];
[invocation performSelectorOnMainThread:@selector(invoke) withObject:nil waitUntilDone:wait];
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}
- (void)sendDelegateMethod:(SEL)selector withObject:(id)obj waitUntilDone:(BOOL)wait {
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[delegate methodSignatureForSelector:selector]];
[invocation setTarget:delegate];
[invocation setSelector:selector];
[invocation setArgument:(void *)&self atIndex:2];
[invocation setArgument:&obj atIndex:3];
[invocation retainArguments];
[invocation performSelectorOnMainThread:@selector(invoke) withObject:nil waitUntilDone:wait];
}
- (void)sendDelegateMethod:(SEL)selector withObject:(id)obj withObject:(id)obj2 waitUntilDone:(BOOL)wait {
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:[delegate methodSignatureForSelector:selector]];
[invocation setTarget:delegate];
[invocation setSelector:selector];
[invocation setArgument:(void *)&self atIndex:2];
[invocation setArgument:&obj atIndex:3];
[invocation setArgument:&obj2 atIndex:4];
[invocation retainArguments];
[invocation performSelectorOnMainThread:@selector(invoke) withObject:nil waitUntilDone:wait];
}
- (void)setPlaybackStatus:(int)status waitUntilDone:(BOOL)wait {
currentPlaybackStatus = status;
[self sendDelegateMethod:@selector(audioPlayer:didChangeStatus:userInfo:) withObject:@(status) withObject:[bufferChain userInfo] waitUntilDone:wait];
}
- (void)sustainHDCD {
[self sendDelegateMethod:@selector(audioPlayer:sustainHDCD:) withObject:[bufferChain userInfo] waitUntilDone:NO];
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}
- (void)setError:(BOOL)status {
[self sendDelegateMethod:@selector(audioPlayer:setError:toTrack:) withObject:@(status) withObject:[bufferChain userInfo] waitUntilDone:NO];
}
- (void)setPlaybackStatus:(int)status {
[self setPlaybackStatus:status waitUntilDone:NO];
}
- (BufferChain *)bufferChain {
return bufferChain;
}
- (OutputNode *)output {
return output;
}
+ (NSArray *)containerTypes {
return [[[PluginController sharedPluginController] containers] allKeys];
}
+ (NSArray *)fileTypes {
PluginController *pluginController = [PluginController sharedPluginController];
NSArray *containerTypes = [[pluginController containers] allKeys];
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NSArray *decoderTypes = [[pluginController decodersByExtension] allKeys];
NSArray *metdataReaderTypes = [[pluginController metadataReaders] allKeys];
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NSArray *propertiesReaderTypes = [[pluginController propertiesReadersByExtension] allKeys];
NSMutableSet *types = [NSMutableSet set];
[types addObjectsFromArray:containerTypes];
[types addObjectsFromArray:decoderTypes];
[types addObjectsFromArray:metdataReaderTypes];
[types addObjectsFromArray:propertiesReaderTypes];
return [types allObjects];
}
+ (NSArray *)schemes {
PluginController *pluginController = [PluginController sharedPluginController];
return [[pluginController sources] allKeys];
}
- (double)volumeUp:(double)amount {
BOOL volumeLimit = [[[NSUserDefaultsController sharedUserDefaultsController] defaults] boolForKey:@"volumeLimit"];
const double MAX_VOLUME = (volumeLimit) ? 100.0 : 800.0;
double newVolume = linearToLogarithmic(logarithmicToLinear(volume + amount, MAX_VOLUME), MAX_VOLUME);
if(newVolume > MAX_VOLUME)
newVolume = MAX_VOLUME;
[self setVolume:newVolume];
// the playbackController needs to know the new volume, so it can update the
// volumeSlider accordingly.
return newVolume;
}
- (double)volumeDown:(double)amount {
BOOL volumeLimit = [[[NSUserDefaultsController sharedUserDefaultsController] defaults] boolForKey:@"volumeLimit"];
const double MAX_VOLUME = (volumeLimit) ? 100.0 : 800.0;
double newVolume;
if(amount > volume)
newVolume = 0.0;
else
newVolume = linearToLogarithmic(logarithmicToLinear(volume - amount, MAX_VOLUME), MAX_VOLUME);
[self setVolume:newVolume];
return newVolume;
}
- (void)waitUntilCallbacksExit {
// This sucks! And since the thread that's inside the function can be calling
// event dispatches, we have to pump the message queue if we're on the main
// thread. Damn.
if(atomic_load_explicit(&refCount, memory_order_relaxed) != 0) {
BOOL mainThread = (dispatch_queue_get_label(dispatch_get_main_queue()) == dispatch_queue_get_label(DISPATCH_CURRENT_QUEUE_LABEL));
atomic_store(&resettingNow, true);
while(atomic_load_explicit(&refCount, memory_order_relaxed) != 0) {
[semaphore signal]; // Gotta poke this periodically
if(mainThread)
[[NSRunLoop currentRunLoop] runUntilDate:[NSDate dateWithTimeIntervalSinceNow:0.001]];
else
usleep(500);
}
atomic_store(&resettingNow, false);
}
}
@end