IMediaPlayerService.cpp revision e104596061b219e9bce6d4db49a9d15242f8d2e5 
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/IRemoteDisplay.h>
28#include <media/IRemoteDisplayClient.h>
29#include <media/IStreamSource.h>
30
31#include <utils/Errors.h>  // for status_t
32#include <utils/String8.h>
33
34namespace android {
35
36enum {
37    CREATE = IBinder::FIRST_CALL_TRANSACTION,
38    DECODE_URL,
39    DECODE_FD,
40    CREATE_MEDIA_RECORDER,
41    CREATE_METADATA_RETRIEVER,
42    GET_OMX,
43    MAKE_CRYPTO,
44    ENABLE_REMOTE_DISPLAY,
45    ADD_BATTERY_DATA,
46    PULL_BATTERY_DATA,
47    LISTEN_FOR_REMOTE_DISPLAY,
48};
49
50class BpMediaPlayerService: public BpInterface<IMediaPlayerService>
51{
52public:
53    BpMediaPlayerService(const sp<IBinder>& impl)
54        : BpInterface<IMediaPlayerService>(impl)
55    {
56    }
57
58    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid)
59    {
60        Parcel data, reply;
61        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
62        data.writeInt32(pid);
63        remote()->transact(CREATE_METADATA_RETRIEVER, data, &reply);
64        return interface_cast<IMediaMetadataRetriever>(reply.readStrongBinder());
65    }
66
67    virtual sp<IMediaPlayer> create(
68            pid_t pid, const sp<IMediaPlayerClient>& client, int audioSessionId) {
69        Parcel data, reply;
70        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
71        data.writeInt32(pid);
72        data.writeStrongBinder(client->asBinder());
73        data.writeInt32(audioSessionId);
74
75        remote()->transact(CREATE, data, &reply);
76        return interface_cast<IMediaPlayer>(reply.readStrongBinder());
77    }
78
79    virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid)
80    {
81        Parcel data, reply;
82        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
83        data.writeInt32(pid);
84        remote()->transact(CREATE_MEDIA_RECORDER, data, &reply);
85        return interface_cast<IMediaRecorder>(reply.readStrongBinder());
86    }
87
88    virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat)
89    {
90        Parcel data, reply;
91        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
92        data.writeCString(url);
93        remote()->transact(DECODE_URL, data, &reply);
94        *pSampleRate = uint32_t(reply.readInt32());
95        *pNumChannels = reply.readInt32();
96        *pFormat = (audio_format_t) reply.readInt32();
97        return interface_cast<IMemory>(reply.readStrongBinder());
98    }
99
100    virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat)
101    {
102        Parcel data, reply;
103        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
104        data.writeFileDescriptor(fd);
105        data.writeInt64(offset);
106        data.writeInt64(length);
107        remote()->transact(DECODE_FD, data, &reply);
108        *pSampleRate = uint32_t(reply.readInt32());
109        *pNumChannels = reply.readInt32();
110        *pFormat = (audio_format_t) reply.readInt32();
111        return interface_cast<IMemory>(reply.readStrongBinder());
112    }
113
114    virtual sp<IOMX> getOMX() {
115        Parcel data, reply;
116        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
117        remote()->transact(GET_OMX, data, &reply);
118        return interface_cast<IOMX>(reply.readStrongBinder());
119    }
120
121    virtual sp<ICrypto> makeCrypto() {
122        Parcel data, reply;
123        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
124        remote()->transact(MAKE_CRYPTO, data, &reply);
125        return interface_cast<ICrypto>(reply.readStrongBinder());
126    }
127
128    virtual status_t enableRemoteDisplay(const char *iface) {
129        Parcel data, reply;
130        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
131
132        if (iface != NULL) {
133            data.writeInt32(1);
134            data.writeCString(iface);
135        } else {
136            data.writeInt32(0);
137        }
138
139        remote()->transact(ENABLE_REMOTE_DISPLAY, data, &reply);
140        return reply.readInt32();
141    }
142
143    virtual void addBatteryData(uint32_t params) {
144        Parcel data, reply;
145        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
146        data.writeInt32(params);
147        remote()->transact(ADD_BATTERY_DATA, data, &reply);
148    }
149
150    virtual status_t pullBatteryData(Parcel* reply) {
151        Parcel data;
152        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
153        return remote()->transact(PULL_BATTERY_DATA, data, reply);
154    }
155
156    virtual sp<IRemoteDisplay> listenForRemoteDisplay(const sp<IRemoteDisplayClient>& client,
157            const String8& iface)
158    {
159        Parcel data, reply;
160        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
161        data.writeStrongBinder(client->asBinder());
162        data.writeString8(iface);
163        remote()->transact(LISTEN_FOR_REMOTE_DISPLAY, data, &reply);
164        return interface_cast<IRemoteDisplay>(reply.readStrongBinder());
165    }
166};
167
168IMPLEMENT_META_INTERFACE(MediaPlayerService, "android.media.IMediaPlayerService");
169
170// ----------------------------------------------------------------------
171
172status_t BnMediaPlayerService::onTransact(
173    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
174{
175    switch (code) {
176        case CREATE: {
177            CHECK_INTERFACE(IMediaPlayerService, data, reply);
178            pid_t pid = data.readInt32();
179            sp<IMediaPlayerClient> client =
180                interface_cast<IMediaPlayerClient>(data.readStrongBinder());
181            int audioSessionId = data.readInt32();
182            sp<IMediaPlayer> player = create(pid, client, audioSessionId);
183            reply->writeStrongBinder(player->asBinder());
184            return NO_ERROR;
185        } break;
186        case DECODE_URL: {
187            CHECK_INTERFACE(IMediaPlayerService, data, reply);
188            const char* url = data.readCString();
189            uint32_t sampleRate;
190            int numChannels;
191            audio_format_t format;
192            sp<IMemory> player = decode(url, &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 DECODE_FD: {
200            CHECK_INTERFACE(IMediaPlayerService, data, reply);
201            int fd = dup(data.readFileDescriptor());
202            int64_t offset = data.readInt64();
203            int64_t length = data.readInt64();
204            uint32_t sampleRate;
205            int numChannels;
206            audio_format_t format;
207            sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format);
208            reply->writeInt32(sampleRate);
209            reply->writeInt32(numChannels);
210            reply->writeInt32((int32_t) format);
211            reply->writeStrongBinder(player->asBinder());
212            return NO_ERROR;
213        } break;
214        case CREATE_MEDIA_RECORDER: {
215            CHECK_INTERFACE(IMediaPlayerService, data, reply);
216            pid_t pid = data.readInt32();
217            sp<IMediaRecorder> recorder = createMediaRecorder(pid);
218            reply->writeStrongBinder(recorder->asBinder());
219            return NO_ERROR;
220        } break;
221        case CREATE_METADATA_RETRIEVER: {
222            CHECK_INTERFACE(IMediaPlayerService, data, reply);
223            pid_t pid = data.readInt32();
224            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid);
225            reply->writeStrongBinder(retriever->asBinder());
226            return NO_ERROR;
227        } break;
228        case GET_OMX: {
229            CHECK_INTERFACE(IMediaPlayerService, data, reply);
230            sp<IOMX> omx = getOMX();
231            reply->writeStrongBinder(omx->asBinder());
232            return NO_ERROR;
233        } break;
234        case MAKE_CRYPTO: {
235            CHECK_INTERFACE(IMediaPlayerService, data, reply);
236            sp<ICrypto> crypto = makeCrypto();
237            reply->writeStrongBinder(crypto->asBinder());
238            return NO_ERROR;
239        } break;
240        case ENABLE_REMOTE_DISPLAY: {
241            CHECK_INTERFACE(IMediaPlayerService, data, reply);
242            const char *iface = NULL;
243            if (data.readInt32()) {
244                iface = data.readCString();
245            }
246            reply->writeInt32(enableRemoteDisplay(iface));
247            return NO_ERROR;
248        } break;
249        case ADD_BATTERY_DATA: {
250            CHECK_INTERFACE(IMediaPlayerService, data, reply);
251            uint32_t params = data.readInt32();
252            addBatteryData(params);
253            return NO_ERROR;
254        } break;
255        case PULL_BATTERY_DATA: {
256            CHECK_INTERFACE(IMediaPlayerService, data, reply);
257            pullBatteryData(reply);
258            return NO_ERROR;
259        } break;
260        case LISTEN_FOR_REMOTE_DISPLAY: {
261            CHECK_INTERFACE(IMediaPlayerService, data, reply);
262            sp<IRemoteDisplayClient> client(
263                    interface_cast<IRemoteDisplayClient>(data.readStrongBinder()));
264            String8 iface(data.readString8());
265            sp<IRemoteDisplay> display(listenForRemoteDisplay(client, iface));
266            reply->writeStrongBinder(display->asBinder());
267            return NO_ERROR;
268        } break;
269        default:
270            return BBinder::onTransact(code, data, reply, flags);
271    }
272}
273
274// ----------------------------------------------------------------------------
275
276}; // namespace android
277