iOS implementation
This commit is contained in:
Ryan Heise
parent
8569c34ce2
commit
687553c875
13 changed files with 554 additions and 19 deletions
16
ios/Classes/AudioPlayer.h
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16
ios/Classes/AudioPlayer.h
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@ -0,0 +1,16 @@
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#import <Flutter/Flutter.h>
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@interface AudioPlayer : NSObject<FlutterStreamHandler>
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- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar playerId:(NSString*)idParam;
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@end
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enum PlaybackState {
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none,
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stopped,
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paused,
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playing,
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buffering,
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connecting
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};
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286
ios/Classes/AudioPlayer.m
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286
ios/Classes/AudioPlayer.m
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@ -0,0 +1,286 @@
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#import "AudioPlayer.h"
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#import <AVFoundation/AVFoundation.h>
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// TODO: Check for and report invalid state transitions.
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@implementation AudioPlayer {
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NSObject<FlutterPluginRegistrar>* _registrar;
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FlutterMethodChannel* _methodChannel;
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FlutterEventChannel* _eventChannel;
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FlutterEventSink _eventSink;
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NSString* _playerId;
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AVPlayer* _player;
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enum PlaybackState _state;
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enum PlaybackState _stateBeforeSeek;
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long long _updateTime;
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int _updatePosition;
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int _seekPos;
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FlutterResult _connectionResult;
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id _endObserver;
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id _timeObserver;
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}
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- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar playerId:(NSString*)idParam {
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self = [super init];
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NSAssert(self, @"super init cannot be nil");
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_registrar = registrar;
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_playerId = idParam;
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_methodChannel = [FlutterMethodChannel
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methodChannelWithName:[NSMutableString stringWithFormat:@"com.ryanheise.just_audio.methods.%@", _playerId]
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binaryMessenger:[registrar messenger]];
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_eventChannel = [FlutterEventChannel
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eventChannelWithName:[NSMutableString stringWithFormat:@"com.ryanheise.just_audio.events.%@", _playerId]
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binaryMessenger:[registrar messenger]];
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[_eventChannel setStreamHandler:self];
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_state = none;
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_stateBeforeSeek = none;
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_player = nil;
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_seekPos = -1;
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_endObserver = 0;
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_timeObserver = 0;
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__weak __typeof__(self) weakSelf = self;
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[_methodChannel setMethodCallHandler:^(FlutterMethodCall* call, FlutterResult result) {
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[weakSelf handleMethodCall:call result:result];
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}];
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return self;
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}
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- (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
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NSArray* args = (NSArray*)call.arguments;
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if ([@"setUrl" isEqualToString:call.method]) {
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[self setUrl:args[0] result:result];
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} else if ([@"play" isEqualToString:call.method]) {
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[self play:args[0]];
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result(nil);
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} else if ([@"pause" isEqualToString:call.method]) {
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[self pause];
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result(nil);
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} else if ([@"stop" isEqualToString:call.method]) {
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[self stop];
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result(nil);
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} else if ([@"setVolume" isEqualToString:call.method]) {
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[self setVolume:(float)[args[0] doubleValue]];
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result(nil);
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} else if ([@"seek" isEqualToString:call.method]) {
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[self seek:[args[0] intValue] result:result];
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result(nil);
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} else if ([@"dispose" isEqualToString:call.method]) {
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[self dispose];
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result(nil);
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} else {
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result(FlutterMethodNotImplemented);
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}
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// TODO
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/* } catch (Exception e) { */
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/* e.printStackTrace(); */
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/* result.error("Error", null, null); */
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/* } */
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}
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- (FlutterError*)onListenWithArguments:(id)arguments eventSink:(FlutterEventSink)eventSink {
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_eventSink = eventSink;
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return nil;
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}
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- (FlutterError*)onCancelWithArguments:(id)arguments {
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_eventSink = nil;
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return nil;
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}
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- (void)checkForDiscontinuity {
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if (!_eventSink) return;
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if (_state != playing && _state != buffering) return;
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long long now = (long long)([[NSDate date] timeIntervalSince1970] * 1000.0);
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int position = [self getCurrentPosition];
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long long timeSinceLastUpdate = now - _updateTime;
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long long expectedPosition = _updatePosition + timeSinceLastUpdate;
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long long drift = position - expectedPosition;
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// Update if we've drifted or just started observing
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if (_updateTime == 0L) {
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[self broadcastPlayerState];
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} else if (drift < -100) {
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NSLog(@"time discontinuity detected: %lld", drift);
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[self setPlaybackState:buffering];
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} else if (_state == buffering) {
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[self setPlaybackState:playing];
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}
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}
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- (void)broadcastPlayerState {
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long long now = (long long)([[NSDate date] timeIntervalSince1970] * 1000.0);
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_updatePosition = [self getCurrentPosition];
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_updateTime = now;
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_eventSink(@[
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// state
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@(_state),
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// updatePosition
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@(_updatePosition),
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// updateTime
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@(_updateTime),
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]);
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}
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- (int)getCurrentPosition {
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if (_state == none || _state == connecting) {
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return 0;
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} else if (_seekPos != -1) {
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return _seekPos;
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} else {
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return (int)(1000 * CMTimeGetSeconds([_player currentTime]));
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}
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}
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- (void)setPlaybackState:(enum PlaybackState)state {
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//enum PlaybackState oldState = _state;
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_state = state;
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// TODO: Investigate when we need to start and stop
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// observing item position.
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/* if (oldState != playing && state == playing) { */
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/* [self startObservingPosition]; */
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/* } */
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[self broadcastPlayerState];
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}
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- (void)setUrl:(NSString*)url result:(FlutterResult)result {
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// TODO: error if already connecting
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_connectionResult = result;
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[self setPlaybackState:connecting];
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if (_player) {
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[[_player currentItem] removeObserver:self forKeyPath:@"status"];
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[[NSNotificationCenter defaultCenter] removeObserver:_endObserver];
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_endObserver = 0;
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}
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AVPlayerItem* playerItem = [[AVPlayerItem alloc] initWithURL:[NSURL URLWithString:url]];
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[playerItem addObserver:self
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forKeyPath:@"status"
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options:NSKeyValueObservingOptionNew
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context:nil];
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// TODO: Add observer for _endObserver.
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_endObserver = [[NSNotificationCenter defaultCenter]
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addObserverForName:AVPlayerItemDidPlayToEndTimeNotification
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object:playerItem
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queue:nil
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usingBlock:^(NSNotification* note) {
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NSLog(@"Reached play end time");
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[self setPlaybackState:stopped];
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}
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];
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if (_player) {
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[_player replaceCurrentItemWithPlayerItem:playerItem];
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} else {
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_player = [[AVPlayer alloc] initWithPlayerItem:playerItem];
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}
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if (_timeObserver) {
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[_player removeTimeObserver:_timeObserver];
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_timeObserver = 0;
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}
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// TODO: learn about the different ways to define weakSelf.
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//__weak __typeof__(self) weakSelf = self;
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//typeof(self) __weak weakSelf = self;
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__unsafe_unretained typeof(self) weakSelf = self;
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_timeObserver = [_player addPeriodicTimeObserverForInterval:CMTimeMake(200, 1000)
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queue:nil
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usingBlock:^(CMTime time) {
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[weakSelf checkForDiscontinuity];
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}
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];
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// We send result after the playerItem is ready in observeValueForKeyPath.
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}
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- (void)observeValueForKeyPath:(NSString *)keyPath
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ofObject:(id)object
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change:(NSDictionary<NSString *,id> *)change
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context:(void *)context {
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if ([keyPath isEqualToString:@"status"]) {
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AVPlayerItemStatus status = AVPlayerItemStatusUnknown;
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NSNumber *statusNumber = change[NSKeyValueChangeNewKey];
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if ([statusNumber isKindOfClass:[NSNumber class]]) {
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status = statusNumber.integerValue;
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}
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switch (status) {
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case AVPlayerItemStatusReadyToPlay:
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[self setPlaybackState:stopped];
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_connectionResult(@((int)(1000 * CMTimeGetSeconds([[_player currentItem] duration]))));
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break;
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case AVPlayerItemStatusFailed:
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NSLog(@"AVPlayerItemStatusFailed");
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_connectionResult(nil);
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break;
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case AVPlayerItemStatusUnknown:
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break;
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}
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}
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}
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- (void)play:(NSNumber*)untilPosition {
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// TODO: dynamically adjust the lag.
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//int lag = 6;
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int start = [self getCurrentPosition];
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if (untilPosition != [NSNull null] && [untilPosition intValue] <= start) {
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return;
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}
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[_player play];
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[self setPlaybackState:playing];
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// TODO: convert this Android code to iOS
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/* if (endDetector != null) { */
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/* handler.removeCallbacks(endDetector); */
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/* } */
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/* if (untilPosition != null) { */
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/* final int duration = Math.max(0, untilPosition - start - lag); */
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/* handler.postDelayed(new Runnable() { */
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/* @Override */
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/* public void run() { */
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/* final int position = getCurrentPosition(); */
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/* if (position > untilPosition - 20) { */
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/* pause(); */
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/* } else { */
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/* final int duration = Math.max(0, untilPosition - position - lag); */
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/* handler.postDelayed(this, duration); */
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/* } */
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/* } */
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/* }, duration); */
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/* } */
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}
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- (void)pause {
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[_player pause];
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[self setPlaybackState:paused];
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}
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- (void)stop {
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[_player pause];
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[[_player currentItem] seekToTime:CMTimeMake(0, 1000)];
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[self setPlaybackState:stopped];
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}
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- (void)setVolume:(float)volume {
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[_player setVolume:volume];
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}
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- (void)seek:(int)position result:(FlutterResult)result {
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_stateBeforeSeek = _state;
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_seekPos = position;
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NSLog(@"seek. enter buffering");
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[self setPlaybackState:buffering];
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[_player seekToTime:CMTimeMake(position, 1000)
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completionHandler:^(BOOL finished) {
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NSLog(@"seek completed");
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[self onSeekCompletion:result];
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}];
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}
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- (void)onSeekCompletion:(FlutterResult)result {
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_seekPos = -1;
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[self setPlaybackState:_stateBeforeSeek];
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_stateBeforeSeek = none;
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result(nil);
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}
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- (void)dispose {
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if (_state != none) {
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[self stop];
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[self setPlaybackState:none];
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}
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}
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@end
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@ -1,17 +1,31 @@
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#import "JustAudioPlugin.h"
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#import "AudioPlayer.h"
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#import "AudioPlayer.h"
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@implementation JustAudioPlugin {
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NSObject<FlutterPluginRegistrar>* _registrar;
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}
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@implementation JustAudioPlugin
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+ (void)registerWithRegistrar:(NSObject<FlutterPluginRegistrar>*)registrar {
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FlutterMethodChannel* channel = [FlutterMethodChannel
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methodChannelWithName:@"just_audio"
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binaryMessenger:[registrar messenger]];
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JustAudioPlugin* instance = [[JustAudioPlugin alloc] init];
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methodChannelWithName:@"com.ryanheise.just_audio.methods"
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binaryMessenger:[registrar messenger]];
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JustAudioPlugin* instance = [[JustAudioPlugin alloc] initWithRegistrar:registrar];
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[registrar addMethodCallDelegate:instance channel:channel];
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}
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- (instancetype)initWithRegistrar:(NSObject<FlutterPluginRegistrar> *)registrar {
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self = [super init];
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NSAssert(self, @"super init cannot be nil");
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_registrar = registrar;
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return self;
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}
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- (void)handleMethodCall:(FlutterMethodCall*)call result:(FlutterResult)result {
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if ([@"getPlatformVersion" isEqualToString:call.method]) {
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result([@"iOS " stringByAppendingString:[[UIDevice currentDevice] systemVersion]]);
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if ([@"init" isEqualToString:call.method]) {
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NSString* playerId = call.arguments;
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AudioPlayer* player = [[AudioPlayer alloc] initWithRegistrar:_registrar playerId:playerId];
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result(nil);
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} else {
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result(FlutterMethodNotImplemented);
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}
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