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 {
29
30class A2dpAudioInterface : public AudioHardwareBase
31{
32    class A2dpAudioStreamOut;
33
34public:
35                        A2dpAudioInterface(AudioHardwareInterface* hw);
36    virtual             ~A2dpAudioInterface();
37    virtual status_t    initCheck();
38
39    virtual status_t    setVoiceVolume(float volume);
40    virtual status_t    setMasterVolume(float volume);
41
42    virtual status_t    setMode(int mode);
43
44    // mic mute
45    virtual status_t    setMicMute(bool state);
46    virtual status_t    getMicMute(bool* state);
47
48    virtual status_t    setParameters(const String8& keyValuePairs);
49    virtual String8     getParameters(const String8& keys);
50
51    virtual size_t      getInputBufferSize(uint32_t sampleRate, int format, int channelCount);
52
53    // create I/O streams
54    virtual AudioStreamOut* openOutputStream(
55                                uint32_t devices,
56                                int *format=0,
57                                uint32_t *channels=0,
58                                uint32_t *sampleRate=0,
59                                status_t *status=0);
60    virtual    void        closeOutputStream(AudioStreamOut* out);
61
62    virtual AudioStreamIn* openInputStream(
63                                uint32_t devices,
64                                int *format,
65                                uint32_t *channels,
66                                uint32_t *sampleRate,
67                                status_t *status,
68                                AudioSystem::audio_in_acoustics acoustics);
69    virtual    void        closeInputStream(AudioStreamIn* in);
70//    static AudioHardwareInterface* createA2dpInterface();
71
72protected:
73    virtual status_t    dump(int fd, const Vector<String16>& args);
74
75private:
76    class A2dpAudioStreamOut : public AudioStreamOut {
77    public:
78                            A2dpAudioStreamOut();
79        virtual             ~A2dpAudioStreamOut();
80                status_t    set(uint32_t device,
81                                int *pFormat,
82                                uint32_t *pChannels,
83                                uint32_t *pRate);
84        virtual uint32_t    sampleRate() const { return 44100; }
85        // SBC codec wants a multiple of 512
86        virtual size_t      bufferSize() const { return 512 * 20; }
87        virtual uint32_t    channels() const { return AudioSystem::CHANNEL_OUT_STEREO; }
88        virtual int         format() const { return AudioSystem::PCM_16_BIT; }
89        virtual uint32_t    latency() const { return ((1000*bufferSize())/frameSize())/sampleRate() + 200; }
90        virtual status_t    setVolume(float left, float right) { return INVALID_OPERATION; }
91        virtual ssize_t     write(const void* buffer, size_t bytes);
92                status_t    standby();
93        virtual status_t    dump(int fd, const Vector<String16>& args);
94        virtual status_t    setParameters(const String8& keyValuePairs);
95        virtual String8     getParameters(const String8& keys);
96        virtual status_t    getRenderPosition(uint32_t *dspFrames);
97
98    private:
99        friend class A2dpAudioInterface;
100                status_t    init();
101                status_t    close();
102                status_t    close_l();
103                status_t    setAddress(const char* address);
104                status_t    setBluetoothEnabled(bool enabled);
105                status_t    setSuspended(bool onOff);
106
107    private:
108                int         mFd;
109                bool        mStandby;
110                int         mStartCount;
111                int         mRetryCount;
112                char        mA2dpAddress[20];
113                void*       mData;
114                Mutex       mLock;
115                bool        mBluetoothEnabled;
116                uint32_t    mDevice;
117                bool        mClosing;
118                bool        mSuspended;
119    };
120
121    friend class A2dpAudioStreamOut;
122
123    A2dpAudioStreamOut*     mOutput;
124    AudioHardwareInterface  *mHardwareInterface;
125    char        mA2dpAddress[20];
126    bool        mBluetoothEnabled;
127    bool        mSuspended;
128};
129
130
131// ----------------------------------------------------------------------------
132
133}; // namespace android
134
135#endif // A2DP_AUDIO_HARDWARE_H
136