Home | History | Annotate | Download | only in webrtc 
      1 /*
      2  * libjingle
      3  * Copyright 2011 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 #include "talk/app/webrtc/mediastream.h"
     29 #include "webrtc/base/logging.h"
     30 
     31 namespace webrtc {
     32 
     33 template <class V>
     34 static typename V::iterator FindTrack(V* vector,
     35                                       const std::string& track_id) {
     36   typename V::iterator it = vector->begin();
     37   for (; it != vector->end(); ++it) {
     38     if ((*it)->id() == track_id) {
     39       break;
     40     }
     41   }
     42   return it;
     43 };
     44 
     45 rtc::scoped_refptr<MediaStream> MediaStream::Create(
     46     const std::string& label) {
     47   rtc::RefCountedObject<MediaStream>* stream =
     48       new rtc::RefCountedObject<MediaStream>(label);
     49   return stream;
     50 }
     51 
     52 MediaStream::MediaStream(const std::string& label)
     53     : label_(label) {
     54 }
     55 
     56 bool MediaStream::AddTrack(AudioTrackInterface* track) {
     57   return AddTrack<AudioTrackVector, AudioTrackInterface>(&audio_tracks_, track);
     58 }
     59 
     60 bool MediaStream::AddTrack(VideoTrackInterface* track) {
     61   return AddTrack<VideoTrackVector, VideoTrackInterface>(&video_tracks_, track);
     62 }
     63 
     64 bool MediaStream::RemoveTrack(AudioTrackInterface* track) {
     65   return RemoveTrack<AudioTrackVector>(&audio_tracks_, track);
     66 }
     67 
     68 bool MediaStream::RemoveTrack(VideoTrackInterface* track) {
     69   return RemoveTrack<VideoTrackVector>(&video_tracks_, track);
     70 }
     71 
     72 rtc::scoped_refptr<AudioTrackInterface>
     73 MediaStream::FindAudioTrack(const std::string& track_id) {
     74   AudioTrackVector::iterator it = FindTrack(&audio_tracks_, track_id);
     75   if (it == audio_tracks_.end())
     76     return NULL;
     77   return *it;
     78 }
     79 
     80 rtc::scoped_refptr<VideoTrackInterface>
     81 MediaStream::FindVideoTrack(const std::string& track_id) {
     82   VideoTrackVector::iterator it = FindTrack(&video_tracks_, track_id);
     83   if (it == video_tracks_.end())
     84     return NULL;
     85   return *it;
     86 }
     87 
     88 template <typename TrackVector, typename Track>
     89 bool MediaStream::AddTrack(TrackVector* tracks, Track* track) {
     90   typename TrackVector::iterator it = FindTrack(tracks, track->id());
     91   if (it != tracks->end())
     92     return false;
     93   tracks->push_back(track);
     94   FireOnChanged();
     95   return true;
     96 }
     97 
     98 template <typename TrackVector>
     99 bool MediaStream::RemoveTrack(TrackVector* tracks,
    100                               MediaStreamTrackInterface* track) {
    101   ASSERT(tracks != NULL);
    102   if (!track)
    103     return false;
    104   typename TrackVector::iterator it = FindTrack(tracks, track->id());
    105   if (it == tracks->end())
    106     return false;
    107   tracks->erase(it);
    108   FireOnChanged();
    109   return true;
    110 }
    111 
    112 }  // namespace webrtc
    113