content/media/omx/AudioOutput.h@97036ab72558 (annotated)
content/media/omx/AudioOutput.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim:set ts=2 sw=2 sts=2 et cindent: */ |
| michael@0 | 3 | /* |
| michael@0 | 4 | * Copyright (c) 2014 The Linux Foundation. All rights reserved. |
| michael@0 | 5 | * Copyright (C) 2008 The Android Open Source Project |
| michael@0 | 6 | * |
| michael@0 | 7 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| michael@0 | 8 | * you may not use this file except in compliance with the License. |
| michael@0 | 9 | * You may obtain a copy of the License at |
| michael@0 | 10 | * |
| michael@0 | 11 | * http://www.apache.org/licenses/LICENSE-2.0 |
| michael@0 | 12 | * |
| michael@0 | 13 | * Unless required by applicable law or agreed to in writing, software |
| michael@0 | 14 | * distributed under the License is distributed on an "AS IS" BASIS, |
| michael@0 | 15 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| michael@0 | 16 | * See the License for the specific language governing permissions and |
| michael@0 | 17 | * limitations under the License. |
| michael@0 | 18 | */ |
| michael@0 | 19 | |
| michael@0 | 20 | #ifndef AUDIOOUTPUT_H_ |
| michael@0 | 21 | #define AUDIOOUTPUT_H_ |
| michael@0 | 22 | |
| michael@0 | 23 | #include <stagefright/foundation/ABase.h> |
| michael@0 | 24 | #include <utils/Mutex.h> |
| michael@0 | 25 | #include <AudioTrack.h> |
| michael@0 | 26 | |
| michael@0 | 27 | #include "AudioSink.h" |
| michael@0 | 28 | |
| michael@0 | 29 | #define LOG_TAG "AudioOffloadPlayer" |
| michael@0 | 30 | |
| michael@0 | 31 | namespace mozilla { |
| michael@0 | 32 | |
| michael@0 | 33 | /** |
| michael@0 | 34 | * Stripped version of Android KK MediaPlayerService::AudioOutput class |
| michael@0 | 35 | * Android MediaPlayer uses AudioOutput as a wrapper to handle |
| michael@0 | 36 | * Android::AudioTrack |
| michael@0 | 37 | * Similarly to ease handling offloaded tracks, part of AudioOutput is used here |
| michael@0 | 38 | */ |
| michael@0 | 39 | class AudioOutput : public AudioSink |
| michael@0 | 40 | { |
| michael@0 | 41 | typedef android::Mutex Mutex; |
| michael@0 | 42 | typedef android::String8 String8; |
| michael@0 | 43 | typedef android::status_t status_t; |
| michael@0 | 44 | typedef android::AudioTrack AudioTrack; |
| michael@0 | 45 | |
| michael@0 | 46 | class CallbackData; |
| michael@0 | 47 | |
| michael@0 | 48 | public: |
| michael@0 | 49 | AudioOutput(int aSessionId, int aUid); |
| michael@0 | 50 | virtual ~AudioOutput(); |
| michael@0 | 51 | |
| michael@0 | 52 | virtual ssize_t FrameSize() const; |
| michael@0 | 53 | virtual status_t GetPosition(uint32_t* aPosition) const; |
| michael@0 | 54 | virtual status_t SetVolume(float aVolume) const; |
| michael@0 | 55 | virtual status_t SetParameters(const String8& aKeyValuePairs); |
| michael@0 | 56 | |
| michael@0 | 57 | // Creates an offloaded audio track with the given parameters |
| michael@0 | 58 | // TODO: Try to recycle audio tracks instead of creating new audio tracks |
| michael@0 | 59 | // every time |
| michael@0 | 60 | virtual status_t Open(uint32_t aSampleRate, |
| michael@0 | 61 | int aChannelCount, |
| michael@0 | 62 | audio_channel_mask_t aChannelMask, |
| michael@0 | 63 | audio_format_t aFormat, |
| michael@0 | 64 | AudioCallback aCb, |
| michael@0 | 65 | void* aCookie, |
| michael@0 | 66 | audio_output_flags_t aFlags = AUDIO_OUTPUT_FLAG_NONE, |
| michael@0 | 67 | const audio_offload_info_t* aOffloadInfo = nullptr); |
| michael@0 | 68 | |
| michael@0 | 69 | virtual status_t Start(); |
| michael@0 | 70 | virtual void Stop(); |
| michael@0 | 71 | virtual void Flush(); |
| michael@0 | 72 | virtual void Pause(); |
| michael@0 | 73 | virtual void Close(); |
| michael@0 | 74 | |
| michael@0 | 75 | private: |
| michael@0 | 76 | static void CallbackWrapper(int aEvent, void* aMe, void* aInfo); |
| michael@0 | 77 | |
| michael@0 | 78 | android::sp<AudioTrack> mTrack; |
| michael@0 | 79 | void* mCallbackCookie; |
| michael@0 | 80 | AudioCallback mCallback; |
| michael@0 | 81 | CallbackData* mCallbackData; |
| michael@0 | 82 | |
| michael@0 | 83 | // Uid of the current process, need to create audio track |
| michael@0 | 84 | int mUid; |
| michael@0 | 85 | |
| michael@0 | 86 | // Session id given by Android::AudioSystem and used to create audio track |
| michael@0 | 87 | int mSessionId; |
| michael@0 | 88 | |
| michael@0 | 89 | // CallbackData is what is passed to the AudioTrack as the "user" data. |
| michael@0 | 90 | // We need to be able to target this to a different Output on the fly, |
| michael@0 | 91 | // so we can't use the Output itself for this. |
| michael@0 | 92 | class CallbackData |
| michael@0 | 93 | { |
| michael@0 | 94 | public: |
| michael@0 | 95 | CallbackData(AudioOutput* aCookie) |
| michael@0 | 96 | { |
| michael@0 | 97 | mData = aCookie; |
| michael@0 | 98 | } |
| michael@0 | 99 | AudioOutput* GetOutput() { return mData;} |
| michael@0 | 100 | void SetOutput(AudioOutput* aNewcookie) { mData = aNewcookie; } |
| michael@0 | 101 | // Lock/Unlock are used by the callback before accessing the payload of |
| michael@0 | 102 | // this object |
| michael@0 | 103 | void Lock() { mLock.lock(); } |
| michael@0 | 104 | void Unlock() { mLock.unlock(); } |
| michael@0 | 105 | private: |
| michael@0 | 106 | AudioOutput* mData; |
| michael@0 | 107 | mutable Mutex mLock; |
| michael@0 | 108 | DISALLOW_EVIL_CONSTRUCTORS(CallbackData); |
| michael@0 | 109 | }; |
| michael@0 | 110 | }; // AudioOutput |
| michael@0 | 111 | |
| michael@0 | 112 | } // namespace mozilla |
| michael@0 | 113 | |
| michael@0 | 114 | #endif /* AUDIOOUTPUT_H_ */ |
