media/base/android/audio_decoder_job.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_BASE_ANDROID_AUDIO_DECODER_JOB_H_
   6 #define MEDIA_BASE_ANDROID_AUDIO_DECODER_JOB_H_
   7
   8 #include <jni.h>
   9 #include <vector>
  10
  11 #include "base/callback.h"
  12 #include "media/base/android/media_decoder_job.h"
  13
  14 namespace media {
  15
  16 class AudioCodecBridge;
  17 class AudioTimestampHelper;
  18
  19 // Class for managing audio decoding jobs.
  20 class AudioDecoderJob : public MediaDecoderJob {
  21  public:
  22   // Creates a new AudioDecoderJob instance for decoding audio.
  23   // |request_data_cb| - Callback used to request more data for the decoder.
  24   // |on_demuxer_config_changed_cb| - Callback used to inform the caller that
  25   // demuxer config has changed.
  26   AudioDecoderJob(const base::Closure& request_data_cb,
  27                   const base::Closure& on_demuxer_config_changed_cb);
  28   virtual ~AudioDecoderJob();
  29
  30   // MediaDecoderJob implementation.
  31   virtual bool HasStream() const override;
  32   virtual void SetDemuxerConfigs(const DemuxerConfigs& configs) override;
  33
  34   // Sets the volume of the audio output.
  35   void SetVolume(double volume);
  36
  37   // Sets the base timestamp for |audio_timestamp_helper_|.
  38   void SetBaseTimestamp(base::TimeDelta base_timestamp);
  39
  40  private:
  41   // MediaDecoderJob implementation.
  42   virtual void ReleaseOutputBuffer(
  43       int output_buffer_index,
  44       size_t size,
  45       bool render_output,
  46       base::TimeDelta current_presentation_timestamp,
  47       const ReleaseOutputCompletionCallback& callback) override;
  48   virtual bool ComputeTimeToRender() const override;
  49   virtual bool AreDemuxerConfigsChanged(
  50       const DemuxerConfigs& configs) const override;
  51   virtual bool CreateMediaCodecBridgeInternal() override;
  52
  53   // Helper method to set the audio output volume.
  54   void SetVolumeInternal();
  55
  56   // Audio configs from the demuxer.
  57   AudioCodec audio_codec_;
  58   int num_channels_;
  59   int sampling_rate_;
  60   std::vector<uint8> audio_extra_data_;
  61   double volume_;
  62   int bytes_per_frame_;
  63
  64   // Base timestamp for the |audio_timestamp_helper_|.
  65   base::TimeDelta base_timestamp_;
  66
  67   // Object to calculate the current audio timestamp for A/V sync.
  68   scoped_ptr<AudioTimestampHelper> audio_timestamp_helper_;
  69
  70   DISALLOW_COPY_AND_ASSIGN(AudioDecoderJob);
  71 };
  72
  73 }  // namespace media
  74
  75 #endif  // MEDIA_BASE_ANDROID_AUDIO_DECODER_JOB_H_