starboard/android/shared/audio_decoder.h

// Copyright 2017 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef STARBOARD_ANDROID_SHARED_AUDIO_DECODER_H_
#define STARBOARD_ANDROID_SHARED_AUDIO_DECODER_H_

#include <jni.h>

#include <queue>
#include <string>

#include "starboard/android/shared/drm_system.h"
#include "starboard/android/shared/media_codec_bridge.h"
#include "starboard/android/shared/media_decoder.h"
#include "starboard/common/ref_counted.h"
#include "starboard/media.h"
#include "starboard/shared/internal_only.h"
#include "starboard/shared/starboard/media/media_util.h"
#include "starboard/shared/starboard/player/decoded_audio_internal.h"
#include "starboard/shared/starboard/player/filter/audio_decoder_internal.h"
#include "starboard/shared/starboard/player/filter/audio_frame_discarder.h"
#include "starboard/shared/starboard/player/job_queue.h"

namespace starboard {
namespace android {
namespace shared {

class AudioDecoder
    : public ::starboard::shared::starboard::player::filter::AudioDecoder,
      private ::starboard::shared::starboard::player::JobQueue::JobOwner,
      private MediaDecoder::Host {
 public:
  typedef ::starboard::shared::starboard::media::AudioStreamInfo
      AudioStreamInfo;

  AudioDecoder(const AudioStreamInfo& audio_stream_info,
               SbDrmSystem drm_system,
               bool enable_flush_during_seek);
  ~AudioDecoder() override;

  void Initialize(const OutputCB& output_cb, const ErrorCB& error_cb) override;
  void Decode(const InputBuffers& input_buffers,
              const ConsumedCB& consumed_cb) override;
  void WriteEndOfStream() override;
  scoped_refptr<DecodedAudio> Read(int* samples_per_second) override;
  void Reset() override;

  bool is_valid() const { return media_decoder_ != NULL; }

 private:
  typedef ::starboard::shared::starboard::player::filter::AudioFrameDiscarder
      AudioFrameDiscarder;

  // The maximum amount of work that can exist in the union of |decoded_audios_|
  // and |media_decoder_->GetNumberOfPendingTasks()|.
  static const int kMaxPendingWorkSize = 64;

  bool InitializeCodec();
  void ProcessOutputBuffer(MediaCodecBridge* media_codec_bridge,
                           const DequeueOutputResult& output) override;
  void OnEndOfStreamWritten(MediaCodecBridge* media_codec_bridge) override {}
  void RefreshOutputFormat(MediaCodecBridge* media_codec_bridge) override;
  bool Tick(MediaCodecBridge* media_codec_bridge) override { return false; }
  void OnFlushing() override {}

  void ReportError(SbPlayerError error, const std::string& error_message);

  const AudioStreamInfo audio_stream_info_;
  const SbMediaAudioSampleType sample_type_;
  const bool enable_flush_during_seek_;

  jint output_sample_rate_;
  jint output_channel_count_;

  DrmSystem* drm_system_;

  OutputCB output_cb_;
  ErrorCB error_cb_;
  ConsumedCB consumed_cb_;

  starboard::Mutex decoded_audios_mutex_;
  std::queue<scoped_refptr<DecodedAudio> > decoded_audios_;

  AudioFrameDiscarder audio_frame_discarder_;
  scoped_ptr<MediaDecoder> media_decoder_;
};

}  // namespace shared
}  // namespace android
}  // namespace starboard

#endif  // STARBOARD_ANDROID_SHARED_AUDIO_DECODER_H_