1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/content/media/omx/AudioSink.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,89 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* vim:set ts=2 sw=2 sts=2 et cindent: */
1.6 +/*
1.7 + * Copyright (c) 2014 The Linux Foundation. All rights reserved.
1.8 + * Copyright (C) 2007 The Android Open Source Project
1.9 + *
1.10 + * Licensed under the Apache License, Version 2.0 (the "License");
1.11 + * you may not use this file except in compliance with the License.
1.12 + * You may obtain a copy of the License at
1.13 + *
1.14 + * http://www.apache.org/licenses/LICENSE-2.0
1.15 + *
1.16 + * Unless required by applicable law or agreed to in writing, software
1.17 + * distributed under the License is distributed on an "AS IS" BASIS,
1.18 + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
1.19 + * See the License for the specific language governing permissions and
1.20 + * limitations under the License.
1.21 + */
1.22 +
1.23 +#ifndef AUDIO_SINK_H_
1.24 +#define AUDIO_SINK_H_
1.25 +
1.26 +#include <utils/Errors.h>
1.27 +#include <utils/String8.h>
1.28 +#include <system/audio.h>
1.29 +
1.30 +#define DEFAULT_AUDIOSINK_BUFFERCOUNT 4
1.31 +#define DEFAULT_AUDIOSINK_BUFFERSIZE 1200
1.32 +#define DEFAULT_AUDIOSINK_SAMPLERATE 44100
1.33 +
1.34 +// when the channel mask isn't known, use the channel count to derive a mask in
1.35 +// AudioSink::open()
1.36 +#define CHANNEL_MASK_USE_CHANNEL_ORDER 0
1.37 +
1.38 +namespace mozilla {
1.39 +
1.40 +/**
1.41 + * AudioSink: abstraction layer for audio output
1.42 + * Stripped version of Android KK MediaPlayerBase::AudioSink class
1.43 + */
1.44 +
1.45 +class AudioSink : public android::RefBase
1.46 +{
1.47 + typedef android::String8 String8;
1.48 + typedef android::status_t status_t;
1.49 +
1.50 +public:
1.51 + enum cb_event_t {
1.52 + CB_EVENT_FILL_BUFFER, // Request to write more data to buffer.
1.53 + CB_EVENT_STREAM_END, // Sent after all the buffers queued in AF and HW
1.54 + // are played back (after stop is called)
1.55 + CB_EVENT_TEAR_DOWN // The AudioTrack was invalidated due to usecase
1.56 + // change. Need to re-evaluate offloading options
1.57 + };
1.58 +
1.59 + // Callback returns the number of bytes actually written to the buffer.
1.60 + typedef size_t (*AudioCallback)(AudioSink* aAudioSink,
1.61 + void* aBuffer,
1.62 + size_t aSize,
1.63 + void* aCookie,
1.64 + cb_event_t aEvent);
1.65 + virtual ~AudioSink() {}
1.66 + virtual ssize_t FrameSize() const = 0;
1.67 + virtual status_t GetPosition(uint32_t* aPosition) const = 0;
1.68 + virtual status_t SetVolume(float aVolume) const = 0;
1.69 + virtual status_t SetParameters(const String8& aKeyValuePairs)
1.70 + {
1.71 + return android::NO_ERROR;
1.72 + }
1.73 +
1.74 + virtual status_t Open(uint32_t aSampleRate,
1.75 + int aChannelCount,
1.76 + audio_channel_mask_t aChannelMask,
1.77 + audio_format_t aFormat=AUDIO_FORMAT_PCM_16_BIT,
1.78 + AudioCallback aCb = nullptr,
1.79 + void* aCookie = nullptr,
1.80 + audio_output_flags_t aFlags = AUDIO_OUTPUT_FLAG_NONE,
1.81 + const audio_offload_info_t* aOffloadInfo = nullptr) = 0;
1.82 +
1.83 + virtual status_t Start() = 0;
1.84 + virtual void Stop() = 0;
1.85 + virtual void Flush() = 0;
1.86 + virtual void Pause() = 0;
1.87 + virtual void Close() = 0;
1.88 +};
1.89 +
1.90 +} // namespace mozilla
1.91 +
1.92 +#endif // AUDIO_SINK_H_
