1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#ifndef A2DP_AUDIO_HARDWARE_H
18#define A2DP_AUDIO_HARDWARE_H
19
20#include <stdint.h>
21#include <sys/types.h>
22
23#include <utils/threads.h>
24
25#include <hardware_legacy/AudioHardwareBase.h>
26
27
28namespace android_audio_legacy {
29    using android::Mutex;
30
31class A2dpAudioInterface : public AudioHardwareBase
32{
33    class A2dpAudioStreamOut;
34
35public:
36                        A2dpAudioInterface(AudioHardwareInterface* hw);
37    virtual             ~A2dpAudioInterface();
38    virtual status_t    initCheck();
39
40    virtual status_t    setVoiceVolume(float volume);
41    virtual status_t    setMasterVolume(float volume);
42
43    virtual status_t    setMode(int mode);
44
45    // mic mute
46    virtual status_t    setMicMute(bool state);
47    virtual status_t    getMicMute(bool* state);
48
49    virtual status_t    setParameters(const String8& keyValuePairs);
50    virtual String8     getParameters(const String8& keys);
51
52    virtual size_t      getInputBufferSize(uint32_t sampleRate, int format, int channelCount);
53
54    // create I/O streams
55    virtual AudioStreamOut* openOutputStream(
56                                uint32_t devices,
57                                int *format=0,
58                                uint32_t *channels=0,
59                                uint32_t *sampleRate=0,
60                                status_t *status=0);
61    virtual    void        closeOutputStream(AudioStreamOut* out);
62
63    virtual AudioStreamIn* openInputStream(
64                                uint32_t devices,
65                                int *format,
66                                uint32_t *channels,
67                                uint32_t *sampleRate,
68                                status_t *status,
69                                AudioSystem::audio_in_acoustics acoustics);
70    virtual    void        closeInputStream(AudioStreamIn* in);
71//    static AudioHardwareInterface* createA2dpInterface();
72
73protected:
74    virtual status_t    dump(int fd, const Vector<String16>& args);
75
76private:
77    class A2dpAudioStreamOut : public AudioStreamOut {
78    public:
79                            A2dpAudioStreamOut();
80        virtual             ~A2dpAudioStreamOut();
81                status_t    set(uint32_t device,
82                                int *pFormat,
83                                uint32_t *pChannels,
84                                uint32_t *pRate);
85        virtual uint32_t    sampleRate() const { return 44100; }
86        // SBC codec wants a multiple of 512
87        virtual size_t      bufferSize() const { return 512 * 20; }
88        virtual uint32_t    channels() const { return AudioSystem::CHANNEL_OUT_STEREO; }
89        virtual int         format() const { return AudioSystem::PCM_16_BIT; }
90        virtual uint32_t    latency() const { return ((1000*bufferSize())/frameSize())/sampleRate() + 200; }
91        virtual status_t    setVolume(float left, float right) { return INVALID_OPERATION; }
92        virtual ssize_t     write(const void* buffer, size_t bytes);
93                status_t    standby();
94        virtual status_t    dump(int fd, const Vector<String16>& args);
95        virtual status_t    setParameters(const String8& keyValuePairs);
96        virtual String8     getParameters(const String8& keys);
97        virtual status_t    getRenderPosition(uint32_t *dspFrames);
98
99    private:
100        friend class A2dpAudioInterface;
101                status_t    init();
102                status_t    close();
103                status_t    close_l();
104                status_t    setAddress(const char* address);
105                status_t    setBluetoothEnabled(bool enabled);
106                status_t    setSuspended(bool onOff);
107                status_t    standby_l();
108
109    private:
110                int         mFd;
111                bool        mStandby;
112                int         mStartCount;
113                int         mRetryCount;
114                char        mA2dpAddress[20];
115                void*       mData;
116                Mutex       mLock;
117                bool        mBluetoothEnabled;
118                uint32_t    mDevice;
119                bool        mClosing;
120                bool        mSuspended;
121                nsecs_t     mLastWriteTime;
122                uint32_t    mBufferDurationUs;
123    };
124
125    friend class A2dpAudioStreamOut;
126
127    A2dpAudioStreamOut*     mOutput;
128    AudioHardwareInterface  *mHardwareInterface;
129    char        mA2dpAddress[20];
130    bool        mBluetoothEnabled;
131    bool        mSuspended;
132};
133
134
135// ----------------------------------------------------------------------------
136
137}; // namespace android
138
139#endif // A2DP_AUDIO_HARDWARE_H
140