android_StreamPlayer.h revision 2b06e20ae32388f6e1dfd088d9773c34e6b1cb45 
1/*
2 * Copyright (C) 2010 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#include <media/IStreamSource.h>
18#include <binder/IServiceManager.h>
19#include "android/android_GenericMediaPlayer.h"
20
21// number of SLuint32 fields to store a buffer event message in an item, by mapping each
22//   to the item key (SLuint32), the item size (SLuint32), and the item data (mask on SLuint32)
23#define NB_BUFFEREVENT_ITEM_FIELDS 3
24
25//--------------------------------------------------------------------------------------------------
26namespace android {
27
28//--------------------------------------------------------------------------------------------------
29class StreamSourceAppProxy : public BnStreamSource {
30public:
31    StreamSourceAppProxy(
32            const void* user, bool userIsAudioPlayer,
33            void *appContext,
34            const void *caller);
35    virtual ~StreamSourceAppProxy();
36
37    // store an item structure to indicate a processed buffer
38    static const SLuint32 kItemProcessed[NB_BUFFEREVENT_ITEM_FIELDS];
39
40    // IStreamSource implementation
41    virtual void setListener(const sp<IStreamListener> &listener);
42    virtual void setBuffers(const Vector<sp<IMemory> > &buffers);
43    virtual void onBufferAvailable(size_t index);
44
45    // Consumption from ABQ
46    void pullFromBuffQueue();
47
48    void receivedCmd_l(IStreamListener::Command cmd, const sp<AMessage> &msg = NULL);
49    void receivedBuffer_l(size_t buffIndex, size_t buffLength);
50
51private:
52    // for mListener and mAvailableBuffers
53    Mutex mLock;
54    sp<IStreamListener> mListener;
55    // array of shared memory buffers
56    Vector<sp<IMemory> > mBuffers;
57    // list of available buffers in shared memory, identified by their index
58    List<size_t> mAvailableBuffers;
59
60    const void* mUser;
61    bool mUserIsAudioPlayer;
62    // the Android Buffer Queue from which data is consumed and written to shared memory
63    IAndroidBufferQueue* mAndroidBufferQueue;
64
65    void *mAppContext;
66    const void *mCaller;
67
68    DISALLOW_EVIL_CONSTRUCTORS(StreamSourceAppProxy);
69};
70
71
72//--------------------------------------------------------------------------------------------------
73class StreamPlayer : public GenericMediaPlayer
74{
75public:
76    StreamPlayer(AudioPlayback_Parameters* params, bool hasVideo);
77    virtual ~StreamPlayer();
78
79    // overridden from GenericPlayer
80    virtual void onMessageReceived(const sp<AMessage> &msg);
81
82    void registerQueueCallback(
83            const void* user, bool userIsAudioPlayer,
84            void *context,
85            const void *caller);
86    void queueRefilled_l();
87    void appClear_l();
88
89protected:
90
91    enum {
92        // message to asynchronously notify mAppProxy the Android Buffer Queue was refilled
93        kWhatQueueRefilled = 'qrfi'
94    };
95
96    sp<StreamSourceAppProxy> mAppProxy; // application proxy for the android buffer queue source
97
98    // overridden from GenericMediaPlayer
99    virtual void onPrepare();
100
101    void onQueueRefilled();
102
103    Mutex mAppProxyLock;
104
105
106private:
107    DISALLOW_EVIL_CONSTRUCTORS(StreamPlayer);
108};
109
110} // namespace android
111
112
113//--------------------------------------------------------------------------------------------------
114/*
115 * xxx_l functions are called with a lock on the CAudioPlayer mObject
116 */
117extern void android_StreamPlayer_realize_l(CAudioPlayer *ap, const notif_cbf_t cbf,
118        void* notifUser);
119