content/media/omx/AudioSink.h@44a2da4a2ab2 (annotated)
content/media/omx/AudioSink.h
Fri, 16 Jan 2015 04:50:19 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Fri, 16 Jan 2015 04:50:19 +0100
- branch
- TOR_BUG_9701
- changeset 13
- 44a2da4a2ab2
- permissions
- -rw-r--r--
Replace accessor implementation with direct member state manipulation, by
request https://trac.torproject.org/projects/tor/ticket/9701#comment:32
| 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) 2007 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 AUDIO_SINK_H_ |
| michael@0 | 21 | #define AUDIO_SINK_H_ |
| michael@0 | 22 | |
| michael@0 | 23 | #include <utils/Errors.h> |
| michael@0 | 24 | #include <utils/String8.h> |
| michael@0 | 25 | #include <system/audio.h> |
| michael@0 | 26 | |
| michael@0 | 27 | #define DEFAULT_AUDIOSINK_BUFFERCOUNT 4 |
| michael@0 | 28 | #define DEFAULT_AUDIOSINK_BUFFERSIZE 1200 |
| michael@0 | 29 | #define DEFAULT_AUDIOSINK_SAMPLERATE 44100 |
| michael@0 | 30 | |
| michael@0 | 31 | // when the channel mask isn't known, use the channel count to derive a mask in |
| michael@0 | 32 | // AudioSink::open() |
| michael@0 | 33 | #define CHANNEL_MASK_USE_CHANNEL_ORDER 0 |
| michael@0 | 34 | |
| michael@0 | 35 | namespace mozilla { |
| michael@0 | 36 | |
| michael@0 | 37 | /** |
| michael@0 | 38 | * AudioSink: abstraction layer for audio output |
| michael@0 | 39 | * Stripped version of Android KK MediaPlayerBase::AudioSink class |
| michael@0 | 40 | */ |
| michael@0 | 41 | |
| michael@0 | 42 | class AudioSink : public android::RefBase |
| michael@0 | 43 | { |
| michael@0 | 44 | typedef android::String8 String8; |
| michael@0 | 45 | typedef android::status_t status_t; |
| michael@0 | 46 | |
| michael@0 | 47 | public: |
| michael@0 | 48 | enum cb_event_t { |
| michael@0 | 49 | CB_EVENT_FILL_BUFFER, // Request to write more data to buffer. |
| michael@0 | 50 | CB_EVENT_STREAM_END, // Sent after all the buffers queued in AF and HW |
| michael@0 | 51 | // are played back (after stop is called) |
| michael@0 | 52 | CB_EVENT_TEAR_DOWN // The AudioTrack was invalidated due to usecase |
| michael@0 | 53 | // change. Need to re-evaluate offloading options |
| michael@0 | 54 | }; |
| michael@0 | 55 | |
| michael@0 | 56 | // Callback returns the number of bytes actually written to the buffer. |
| michael@0 | 57 | typedef size_t (*AudioCallback)(AudioSink* aAudioSink, |
| michael@0 | 58 | void* aBuffer, |
| michael@0 | 59 | size_t aSize, |
| michael@0 | 60 | void* aCookie, |
| michael@0 | 61 | cb_event_t aEvent); |
| michael@0 | 62 | virtual ~AudioSink() {} |
| michael@0 | 63 | virtual ssize_t FrameSize() const = 0; |
| michael@0 | 64 | virtual status_t GetPosition(uint32_t* aPosition) const = 0; |
| michael@0 | 65 | virtual status_t SetVolume(float aVolume) const = 0; |
| michael@0 | 66 | virtual status_t SetParameters(const String8& aKeyValuePairs) |
| michael@0 | 67 | { |
| michael@0 | 68 | return android::NO_ERROR; |
| michael@0 | 69 | } |
| michael@0 | 70 | |
| michael@0 | 71 | virtual status_t Open(uint32_t aSampleRate, |
| michael@0 | 72 | int aChannelCount, |
| michael@0 | 73 | audio_channel_mask_t aChannelMask, |
| michael@0 | 74 | audio_format_t aFormat=AUDIO_FORMAT_PCM_16_BIT, |
| michael@0 | 75 | AudioCallback aCb = nullptr, |
| michael@0 | 76 | void* aCookie = nullptr, |
| michael@0 | 77 | audio_output_flags_t aFlags = AUDIO_OUTPUT_FLAG_NONE, |
| michael@0 | 78 | const audio_offload_info_t* aOffloadInfo = nullptr) = 0; |
| michael@0 | 79 | |
| michael@0 | 80 | virtual status_t Start() = 0; |
| michael@0 | 81 | virtual void Stop() = 0; |
| michael@0 | 82 | virtual void Flush() = 0; |
| michael@0 | 83 | virtual void Pause() = 0; |
| michael@0 | 84 | virtual void Close() = 0; |
| michael@0 | 85 | }; |
| michael@0 | 86 | |
| michael@0 | 87 | } // namespace mozilla |
| michael@0 | 88 | |
| michael@0 | 89 | #endif // AUDIO_SINK_H_ |
