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      1 /*
      2  * libjingle
      3  * Copyright 2013, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #if !defined(__has_feature) || !__has_feature(objc_arc)
     29 #error "This file requires ARC support."
     30 #endif
     31 
     32 #import "RTCMediaStreamTrack+internal.h"
     33 #import "RTCEnumConverter.h"
     34 
     35 @implementation RTCMediaStreamTrack {
     36   talk_base::scoped_refptr<webrtc::MediaStreamTrackInterface> _mediaTrack;
     37 }
     38 
     39 @synthesize label;
     40 
     41 - (BOOL)isEqual:(id)other {
     42   // Equality is purely based on the label just like the C++ implementation.
     43   if (self == other) return YES;
     44   if (![other isKindOfClass:[self class]] ||
     45       ![self isKindOfClass:[other class]]) {
     46     return NO;
     47   }
     48   RTCMediaStreamTrack *otherMediaStream = (RTCMediaStreamTrack *)other;
     49   return [self.label isEqual:otherMediaStream.label];
     50 }
     51 
     52 - (NSUInteger)hash {
     53   return [self.label hash];
     54 }
     55 
     56 - (NSString *)kind {
     57   return @(self.mediaTrack->kind().c_str());
     58 }
     59 
     60 - (NSString *)label {
     61   return @(self.mediaTrack->id().c_str());
     62 }
     63 
     64 - (BOOL)isEnabled {
     65   return self.mediaTrack->enabled();
     66 }
     67 
     68 - (BOOL)setEnabled:(BOOL)enabled {
     69   return self.mediaTrack->set_enabled(enabled);
     70 }
     71 
     72 - (RTCTrackState)state {
     73   return [RTCEnumConverter convertTrackStateToObjC:self.mediaTrack->state()];
     74 }
     75 
     76 - (BOOL)setState:(RTCTrackState)state {
     77   return self.mediaTrack->set_state(
     78       [RTCEnumConverter convertTrackStateToNative:state]);
     79 }
     80 
     81 @end
     82 
     83 @implementation RTCMediaStreamTrack (Internal)
     84 
     85 - (id)initWithMediaTrack:(
     86     talk_base::scoped_refptr<webrtc::MediaStreamTrackInterface>)mediaTrack {
     87   if (!mediaTrack) {
     88     NSAssert(NO, @"nil arguments not allowed");
     89     self = nil;
     90     return nil;
     91   }
     92   if ((self = [super init])) {
     93     _mediaTrack = mediaTrack;
     94     label = @(mediaTrack->id().c_str());
     95   }
     96   return self;
     97 }
     98 
     99 - (talk_base::scoped_refptr<webrtc::MediaStreamTrackInterface>)mediaTrack {
    100   return _mediaTrack;
    101 }
    102 
    103 @end
    104