src/media/cast/audio_sender/audio_encoder.h

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef MEDIA_CAST_AUDIO_SENDER_AUDIO_ENCODER_H_
   6 #define MEDIA_CAST_AUDIO_SENDER_AUDIO_ENCODER_H_
   7
   8 #include "base/memory/ref_counted.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "media/cast/cast_config.h"
  11 #include "media/cast/cast_environment.h"
  12 #include "media/cast/rtp_sender/rtp_sender.h"
  13
  14 namespace webrtc {
  15 class AudioCodingModule;
  16 }
  17
  18 namespace media {
  19 namespace cast {
  20
  21 class WebrtEncodedDataCallback;
  22
  23 // Thread safe class.
  24 // It should be called from the main cast thread; however that is not required.
  25 class AudioEncoder : public base::RefCountedThreadSafe<AudioEncoder> {
  26  public:
  27   typedef base::Callback<void(scoped_ptr<EncodedAudioFrame>,
  28                               const base::TimeTicks&)> FrameEncodedCallback;
  29
  30   AudioEncoder(scoped_refptr<CastEnvironment> cast_environment,
  31                const AudioSenderConfig& audio_config);
  32
  33   // The audio_frame must be valid until the closure callback is called.
  34   // The closure callback is called from the main cast thread as soon as
  35   // the encoder is done with the frame; it does not mean that the encoded frame
  36   // has been sent out.
  37   void InsertRawAudioFrame(const PcmAudioFrame* audio_frame,
  38                            const base::TimeTicks& recorded_time,
  39                            const FrameEncodedCallback& frame_encoded_callback,
  40                            const base::Closure callback);
  41
  42  protected:
  43   virtual ~AudioEncoder();
  44
  45  private:
  46   friend class base::RefCountedThreadSafe<AudioEncoder>;
  47
  48   void EncodeAudioFrameThread(
  49       const PcmAudioFrame* audio_frame,
  50       const base::TimeTicks& recorded_time,
  51       const FrameEncodedCallback& frame_encoded_callback,
  52       const base::Closure release_callback);
  53
  54   scoped_refptr<CastEnvironment> cast_environment_;
  55   scoped_ptr<webrtc::AudioCodingModule> audio_encoder_;
  56   scoped_ptr<WebrtEncodedDataCallback> webrtc_encoder_callback_;
  57   uint32 timestamp_;
  58
  59   DISALLOW_COPY_AND_ASSIGN(AudioEncoder);
  60 };
  61
  62 }  // namespace cast
  63 }  // namespace media
  64
  65 #endif  // MEDIA_CAST_AUDIO_SENDER_AUDIO_ENCODER_H_