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Side by Side Diff: media/base/android/media_codec_audio_decoder.h

Issue 1682923003: Rename browser side MediaCodec-based decoders (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Reformatted to make bots happy Created 4 years, 10 months ago
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1 // Copyright 2015 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_MEDIA_CODEC_AUDIO_DECODER_H_
6 #define MEDIA_BASE_ANDROID_MEDIA_CODEC_AUDIO_DECODER_H_
7
8 #include <stddef.h>
9 #include <stdint.h>
10
11 #include "base/macros.h"
12 #include "media/base/android/media_codec_decoder.h"
13
14 namespace media {
15
16 class AudioTimestampHelper;
17
18 // Audio decoder for MediaCodecPlayer
19 class MediaCodecAudioDecoder : public MediaCodecDecoder {
20 public:
21 // For parameters see media_codec_decoder.h
22 // update_current_time_cb: callback that reports current playback time.
23 // Called for each rendered frame.
24 MediaCodecAudioDecoder(
25 const scoped_refptr<base::SingleThreadTaskRunner>& media_runner,
26 FrameStatistics* frame_statistics,
27 const base::Closure& request_data_cb,
28 const base::Closure& starvation_cb,
29 const base::Closure& decoder_drained_cb,
30 const base::Closure& stop_done_cb,
31 const base::Closure& waiting_for_decryption_key_cb,
32 const base::Closure& error_cb,
33 const SetTimeCallback& update_current_time_cb);
34 ~MediaCodecAudioDecoder() override;
35
36 const char* class_name() const override;
37
38 bool HasStream() const override;
39 void SetDemuxerConfigs(const DemuxerConfigs& configs) override;
40 bool IsContentEncrypted() const override;
41 void ReleaseDecoderResources() override;
42 void Flush() override;
43
44 // Sets the volume of the audio output.
45 void SetVolume(double volume);
46
47 // Sets the base timestamp for |audio_timestamp_helper_|.
48 void SetBaseTimestamp(base::TimeDelta base_timestamp);
49
50 protected:
51 bool IsCodecReconfigureNeeded(const DemuxerConfigs& next) const override;
52 ConfigStatus ConfigureInternal(jobject media_crypto) override;
53 void OnOutputFormatChanged() override;
54 void Render(int buffer_index,
55 size_t offset,
56 size_t size,
57 RenderMode render_mode,
58 base::TimeDelta pts,
59 bool eos_encountered) override;
60
61 private:
62 // A helper method to set the volume.
63 void SetVolumeInternal();
64
65 // Recreates |audio_timestamp_helper_|, called when sampling rate is changed.
66 void ResetTimestampHelper();
67
68 // Data.
69
70 // Configuration received from demuxer
71 DemuxerConfigs configs_;
72
73 // Requested volume
74 double volume_;
75
76 // Number of bytes per audio frame. Depends on the output format and the
77 // number of channels.
78 int bytes_per_frame_;
79
80 // The sampling rate received from decoder.
81 int output_sampling_rate_;
82
83 // Frame count to sync with audio codec output.
84 int64_t frame_count_;
85
86 // Base timestamp for the |audio_timestamp_helper_|.
87 base::TimeDelta base_timestamp_;
88
89 // Object to calculate the current audio timestamp for A/V sync.
90 scoped_ptr<AudioTimestampHelper> audio_timestamp_helper_;
91
92 // Reports current playback time to the callee.
93 SetTimeCallback update_current_time_cb_;
94
95 // The time limit for the next frame to avoid underrun.
96 base::TimeTicks next_frame_time_limit_;
97
98 DISALLOW_COPY_AND_ASSIGN(MediaCodecAudioDecoder);
99 };
100
101 } // namespace media
102
103 #endif // MEDIA_BASE_ANDROID_MEDIA_CODEC_DECODER_H_
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