IMediaPlayerService.cpp revision ab1bd84889273bc21efdabe5ff6f4633eb918a85 
1/*
2**
3** Copyright 2008, The Android Open Source Project
4**
5** Licensed under the Apache License, Version 2.0 (the "License");
6** you may not use this file except in compliance with the License.
7** You may obtain a copy of the License at
8**
9**     http://www.apache.org/licenses/LICENSE-2.0
10**
11** Unless required by applicable law or agreed to in writing, software
12** distributed under the License is distributed on an "AS IS" BASIS,
13** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14** See the License for the specific language governing permissions and
15** limitations under the License.
16*/
17
18#include <stdint.h>
19#include <sys/types.h>
20
21#include <binder/Parcel.h>
22#include <binder/IMemory.h>
23#include <media/ICrypto.h>
24#include <media/IMediaPlayerService.h>
25#include <media/IMediaRecorder.h>
26#include <media/IOMX.h>
27#include <media/IStreamSource.h>
28
29#include <utils/Errors.h>  // for status_t
30
31namespace android {
32
33enum {
34    CREATE = IBinder::FIRST_CALL_TRANSACTION,
35    DECODE_URL,
36    DECODE_FD,
37    CREATE_MEDIA_RECORDER,
38    CREATE_METADATA_RETRIEVER,
39    GET_OMX,
40    MAKE_CRYPTO,
41    ENABLE_REMOTE_DISPLAY,
42    ADD_BATTERY_DATA,
43    PULL_BATTERY_DATA
44};
45
46class BpMediaPlayerService: public BpInterface<IMediaPlayerService>
47{
48public:
49    BpMediaPlayerService(const sp<IBinder>& impl)
50        : BpInterface<IMediaPlayerService>(impl)
51    {
52    }
53
54    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid)
55    {
56        Parcel data, reply;
57        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
58        data.writeInt32(pid);
59        remote()->transact(CREATE_METADATA_RETRIEVER, data, &reply);
60        return interface_cast<IMediaMetadataRetriever>(reply.readStrongBinder());
61    }
62
63    virtual sp<IMediaPlayer> create(
64            pid_t pid, const sp<IMediaPlayerClient>& client, int audioSessionId) {
65        Parcel data, reply;
66        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
67        data.writeInt32(pid);
68        data.writeStrongBinder(client->asBinder());
69        data.writeInt32(audioSessionId);
70
71        remote()->transact(CREATE, data, &reply);
72        return interface_cast<IMediaPlayer>(reply.readStrongBinder());
73    }
74
75    virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid)
76    {
77        Parcel data, reply;
78        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
79        data.writeInt32(pid);
80        remote()->transact(CREATE_MEDIA_RECORDER, data, &reply);
81        return interface_cast<IMediaRecorder>(reply.readStrongBinder());
82    }
83
84    virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat)
85    {
86        Parcel data, reply;
87        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
88        data.writeCString(url);
89        remote()->transact(DECODE_URL, data, &reply);
90        *pSampleRate = uint32_t(reply.readInt32());
91        *pNumChannels = reply.readInt32();
92        *pFormat = (audio_format_t) reply.readInt32();
93        return interface_cast<IMemory>(reply.readStrongBinder());
94    }
95
96    virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat)
97    {
98        Parcel data, reply;
99        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
100        data.writeFileDescriptor(fd);
101        data.writeInt64(offset);
102        data.writeInt64(length);
103        remote()->transact(DECODE_FD, data, &reply);
104        *pSampleRate = uint32_t(reply.readInt32());
105        *pNumChannels = reply.readInt32();
106        *pFormat = (audio_format_t) reply.readInt32();
107        return interface_cast<IMemory>(reply.readStrongBinder());
108    }
109
110    virtual sp<IOMX> getOMX() {
111        Parcel data, reply;
112        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
113        remote()->transact(GET_OMX, data, &reply);
114        return interface_cast<IOMX>(reply.readStrongBinder());
115    }
116
117    virtual sp<ICrypto> makeCrypto() {
118        Parcel data, reply;
119        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
120        remote()->transact(MAKE_CRYPTO, data, &reply);
121        return interface_cast<ICrypto>(reply.readStrongBinder());
122    }
123
124    virtual status_t enableRemoteDisplay(const char *iface) {
125        Parcel data, reply;
126        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
127
128        if (iface != NULL) {
129            data.writeInt32(1);
130            data.writeCString(iface);
131        } else {
132            data.writeInt32(0);
133        }
134
135        remote()->transact(ENABLE_REMOTE_DISPLAY, data, &reply);
136        return reply.readInt32();
137    }
138
139    virtual void addBatteryData(uint32_t params) {
140        Parcel data, reply;
141        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
142        data.writeInt32(params);
143        remote()->transact(ADD_BATTERY_DATA, data, &reply);
144    }
145
146    virtual status_t pullBatteryData(Parcel* reply) {
147        Parcel data;
148        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
149        return remote()->transact(PULL_BATTERY_DATA, data, reply);
150    }
151};
152
153IMPLEMENT_META_INTERFACE(MediaPlayerService, "android.media.IMediaPlayerService");
154
155// ----------------------------------------------------------------------
156
157status_t BnMediaPlayerService::onTransact(
158    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
159{
160    switch (code) {
161        case CREATE: {
162            CHECK_INTERFACE(IMediaPlayerService, data, reply);
163            pid_t pid = data.readInt32();
164            sp<IMediaPlayerClient> client =
165                interface_cast<IMediaPlayerClient>(data.readStrongBinder());
166            int audioSessionId = data.readInt32();
167            sp<IMediaPlayer> player = create(pid, client, audioSessionId);
168            reply->writeStrongBinder(player->asBinder());
169            return NO_ERROR;
170        } break;
171        case DECODE_URL: {
172            CHECK_INTERFACE(IMediaPlayerService, data, reply);
173            const char* url = data.readCString();
174            uint32_t sampleRate;
175            int numChannels;
176            audio_format_t format;
177            sp<IMemory> player = decode(url, &sampleRate, &numChannels, &format);
178            reply->writeInt32(sampleRate);
179            reply->writeInt32(numChannels);
180            reply->writeInt32((int32_t) format);
181            reply->writeStrongBinder(player->asBinder());
182            return NO_ERROR;
183        } break;
184        case DECODE_FD: {
185            CHECK_INTERFACE(IMediaPlayerService, data, reply);
186            int fd = dup(data.readFileDescriptor());
187            int64_t offset = data.readInt64();
188            int64_t length = data.readInt64();
189            uint32_t sampleRate;
190            int numChannels;
191            audio_format_t format;
192            sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format);
193            reply->writeInt32(sampleRate);
194            reply->writeInt32(numChannels);
195            reply->writeInt32((int32_t) format);
196            reply->writeStrongBinder(player->asBinder());
197            return NO_ERROR;
198        } break;
199        case CREATE_MEDIA_RECORDER: {
200            CHECK_INTERFACE(IMediaPlayerService, data, reply);
201            pid_t pid = data.readInt32();
202            sp<IMediaRecorder> recorder = createMediaRecorder(pid);
203            reply->writeStrongBinder(recorder->asBinder());
204            return NO_ERROR;
205        } break;
206        case CREATE_METADATA_RETRIEVER: {
207            CHECK_INTERFACE(IMediaPlayerService, data, reply);
208            pid_t pid = data.readInt32();
209            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid);
210            reply->writeStrongBinder(retriever->asBinder());
211            return NO_ERROR;
212        } break;
213        case GET_OMX: {
214            CHECK_INTERFACE(IMediaPlayerService, data, reply);
215            sp<IOMX> omx = getOMX();
216            reply->writeStrongBinder(omx->asBinder());
217            return NO_ERROR;
218        } break;
219        case MAKE_CRYPTO: {
220            CHECK_INTERFACE(IMediaPlayerService, data, reply);
221            sp<ICrypto> crypto = makeCrypto();
222            reply->writeStrongBinder(crypto->asBinder());
223            return NO_ERROR;
224        } break;
225        case ENABLE_REMOTE_DISPLAY: {
226            CHECK_INTERFACE(IMediaPlayerService, data, reply);
227            const char *iface = NULL;
228            if (data.readInt32()) {
229                iface = data.readCString();
230            }
231            reply->writeInt32(enableRemoteDisplay(iface));
232            return NO_ERROR;
233        } break;
234        case ADD_BATTERY_DATA: {
235            CHECK_INTERFACE(IMediaPlayerService, data, reply);
236            uint32_t params = data.readInt32();
237            addBatteryData(params);
238            return NO_ERROR;
239        } break;
240        case PULL_BATTERY_DATA: {
241            CHECK_INTERFACE(IMediaPlayerService, data, reply);
242            pullBatteryData(reply);
243            return NO_ERROR;
244        } break;
245        default:
246            return BBinder::onTransact(code, data, reply, flags);
247    }
248}
249
250// ----------------------------------------------------------------------------
251
252}; // namespace android
253