DOUAudioStreamer.m
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/* vim: set ft=objc fenc=utf-8 sw=2 ts=2 et: */
/*
* DOUAudioStreamer - A Core Audio based streaming audio player for iOS/Mac:
*
* https://github.com/douban/DOUAudioStreamer
*
* Copyright 2013-2016 Douban Inc. All rights reserved.
*
* Use and distribution licensed under the BSD license. See
* the LICENSE file for full text.
*
* Authors:
* Chongyu Zhu <i@lembacon.com>
*
*/
#import "DOUAudioStreamer.h"
#import "DOUAudioStreamer_Private.h"
#import "DOUAudioFileProvider.h"
#import "DOUAudioEventLoop.h"
NSString *const kDOUAudioStreamerErrorDomain = @"com.douban.audio-streamer.error-domain";
@interface DOUAudioStreamer () {
@private
id <DOUAudioFile> _audioFile;
DOUAudioStreamerStatus _status;
NSError *_error;
NSTimeInterval _duration;
NSInteger _timingOffset;
DOUAudioFileProvider *_fileProvider;
DOUAudioPlaybackItem *_playbackItem;
DOUAudioDecoder *_decoder;
double _bufferingRatio;
#if TARGET_OS_IPHONE
BOOL _pausedByInterruption;
#endif /* TARGET_OS_IPHONE */
}
@end
@implementation DOUAudioStreamer
@synthesize status = _status;
@synthesize error = _error;
@synthesize duration = _duration;
@synthesize timingOffset = _timingOffset;
@synthesize fileProvider = _fileProvider;
@synthesize playbackItem = _playbackItem;
@synthesize decoder = _decoder;
@synthesize bufferingRatio = _bufferingRatio;
#if TARGET_OS_IPHONE
@synthesize pausedByInterruption = _pausedByInterruption;
#endif /* TARGET_OS_IPHONE */
+ (instancetype)streamerWithAudioFile:(id <DOUAudioFile>)audioFile
{
return [[[self class] alloc] initWithAudioFile:audioFile];
}
- (instancetype)initWithAudioFile:(id <DOUAudioFile>)audioFile
{
self = [super init];
if (self) {
_audioFile = audioFile;
_status = DOUAudioStreamerIdle;
_fileProvider = [DOUAudioFileProvider fileProviderWithAudioFile:_audioFile];
if (_fileProvider == nil) {
return nil;
}
_bufferingRatio = (double)[_fileProvider receivedLength] / [_fileProvider expectedLength];
}
return self;
}
+ (double)volume
{
return [[DOUAudioEventLoop sharedEventLoop] volume];
}
+ (void)setVolume:(double)volume
{
[[DOUAudioEventLoop sharedEventLoop] setVolume:volume];
}
+ (NSArray *)analyzers
{
return [[DOUAudioEventLoop sharedEventLoop] analyzers];
}
+ (void)setAnalyzers:(NSArray *)analyzers
{
[[DOUAudioEventLoop sharedEventLoop] setAnalyzers:analyzers];
}
+ (void)setHintWithAudioFile:(id <DOUAudioFile>)audioFile
{
[DOUAudioFileProvider setHintWithAudioFile:audioFile];
}
- (id <DOUAudioFile>)audioFile
{
return _audioFile;
}
- (NSURL *)url
{
return [_audioFile audioFileURL];
}
- (NSTimeInterval)currentTime
{
if ([[DOUAudioEventLoop sharedEventLoop] currentStreamer] != self) {
return 0.0;
}
return [[DOUAudioEventLoop sharedEventLoop] currentTime];
}
- (void)setCurrentTime:(NSTimeInterval)currentTime
{
if ([[DOUAudioEventLoop sharedEventLoop] currentStreamer] != self) {
return;
}
[[DOUAudioEventLoop sharedEventLoop] setCurrentTime:currentTime];
}
- (double)volume
{
return [[self class] volume];
}
- (void)setVolume:(double)volume
{
[[self class] setVolume:volume];
}
- (NSArray *)analyzers
{
return [[self class] analyzers];
}
- (void)setAnalyzers:(NSArray *)analyzers
{
[[self class] setAnalyzers:analyzers];
}
- (NSString *)cachedPath
{
return [_fileProvider cachedPath];
}
- (NSURL *)cachedURL
{
return [_fileProvider cachedURL];
}
- (NSString *)sha256
{
return [_fileProvider sha256];
}
- (NSUInteger)expectedLength
{
return [_fileProvider expectedLength];
}
- (NSUInteger)receivedLength
{
return [_fileProvider receivedLength];
}
- (NSUInteger)downloadSpeed
{
return [_fileProvider downloadSpeed];
}
- (void)play
{
@synchronized(self) {
if (_status != DOUAudioStreamerPaused &&
_status != DOUAudioStreamerIdle &&
_status != DOUAudioStreamerFinished) {
return;
}
if ([[DOUAudioEventLoop sharedEventLoop] currentStreamer] != self) {
[[DOUAudioEventLoop sharedEventLoop] pause];
[[DOUAudioEventLoop sharedEventLoop] setCurrentStreamer:self];
}
[[DOUAudioEventLoop sharedEventLoop] play];
}
}
- (void)pause
{
@synchronized(self) {
if (_status == DOUAudioStreamerPaused ||
_status == DOUAudioStreamerIdle ||
_status == DOUAudioStreamerFinished) {
return;
}
if ([[DOUAudioEventLoop sharedEventLoop] currentStreamer] != self) {
return;
}
[[DOUAudioEventLoop sharedEventLoop] pause];
}
}
- (void)stop
{
@synchronized(self) {
if (_status == DOUAudioStreamerIdle) {
return;
}
if ([[DOUAudioEventLoop sharedEventLoop] currentStreamer] != self) {
return;
}
[[DOUAudioEventLoop sharedEventLoop] stop];
[[DOUAudioEventLoop sharedEventLoop] setCurrentStreamer:nil];
}
}
@end