IMediaPlayerService.cpp revision e2b1028852120bcfded33b8f06f66b780437fe92 
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/IMediaPlayerService.h>
24#include <media/IMediaRecorder.h>
25#include <media/IOMX.h>
26#include <media/IStreamSource.h>
27
28#include <utils/Errors.h>  // for status_t
29
30namespace android {
31
32enum {
33    CREATE_URL = IBinder::FIRST_CALL_TRANSACTION,
34    CREATE_FD,
35    CREATE_STREAM,
36    DECODE_URL,
37    DECODE_FD,
38    CREATE_MEDIA_RECORDER,
39    CREATE_METADATA_RETRIEVER,
40    GET_OMX
41};
42
43class BpMediaPlayerService: public BpInterface<IMediaPlayerService>
44{
45public:
46    BpMediaPlayerService(const sp<IBinder>& impl)
47        : BpInterface<IMediaPlayerService>(impl)
48    {
49    }
50
51    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid)
52    {
53        Parcel data, reply;
54        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
55        data.writeInt32(pid);
56        remote()->transact(CREATE_METADATA_RETRIEVER, data, &reply);
57        return interface_cast<IMediaMetadataRetriever>(reply.readStrongBinder());
58    }
59
60    virtual sp<IMediaPlayer> create(
61            pid_t pid, const sp<IMediaPlayerClient>& client,
62            const char* url, const KeyedVector<String8, String8> *headers, int audioSessionId) {
63        Parcel data, reply;
64        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
65        data.writeInt32(pid);
66        data.writeStrongBinder(client->asBinder());
67        data.writeCString(url);
68
69        if (headers == NULL) {
70            data.writeInt32(0);
71        } else {
72            // serialize the headers
73            data.writeInt32(headers->size());
74            for (size_t i = 0; i < headers->size(); ++i) {
75                data.writeString8(headers->keyAt(i));
76                data.writeString8(headers->valueAt(i));
77            }
78        }
79        data.writeInt32(audioSessionId);
80
81        remote()->transact(CREATE_URL, data, &reply);
82
83        return interface_cast<IMediaPlayer>(reply.readStrongBinder());
84    }
85
86    virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid)
87    {
88        Parcel data, reply;
89        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
90        data.writeInt32(pid);
91        remote()->transact(CREATE_MEDIA_RECORDER, data, &reply);
92        return interface_cast<IMediaRecorder>(reply.readStrongBinder());
93    }
94
95    virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd,
96            int64_t offset, int64_t length, int audioSessionId)
97    {
98        Parcel data, reply;
99        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
100        data.writeInt32(pid);
101        data.writeStrongBinder(client->asBinder());
102        data.writeFileDescriptor(fd);
103        data.writeInt64(offset);
104        data.writeInt64(length);
105        data.writeInt32(audioSessionId);
106
107        remote()->transact(CREATE_FD, data, &reply);
108
109        return interface_cast<IMediaPlayer>(reply.readStrongBinder());;
110    }
111
112    virtual sp<IMediaPlayer> create(
113            pid_t pid, const sp<IMediaPlayerClient> &client,
114            const sp<IStreamSource> &source, int audioSessionId) {
115        Parcel data, reply;
116        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
117        data.writeInt32(static_cast<int32_t>(pid));
118        data.writeStrongBinder(client->asBinder());
119        data.writeStrongBinder(source->asBinder());
120        data.writeInt32(static_cast<int32_t>(audioSessionId));
121
122        remote()->transact(CREATE_STREAM, data, &reply);
123
124        return interface_cast<IMediaPlayer>(reply.readStrongBinder());;
125    }
126
127    virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
128    {
129        Parcel data, reply;
130        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
131        data.writeCString(url);
132        remote()->transact(DECODE_URL, data, &reply);
133        *pSampleRate = uint32_t(reply.readInt32());
134        *pNumChannels = reply.readInt32();
135        *pFormat = reply.readInt32();
136        return interface_cast<IMemory>(reply.readStrongBinder());
137    }
138
139    virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
140    {
141        Parcel data, reply;
142        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
143        data.writeFileDescriptor(fd);
144        data.writeInt64(offset);
145        data.writeInt64(length);
146        remote()->transact(DECODE_FD, data, &reply);
147        *pSampleRate = uint32_t(reply.readInt32());
148        *pNumChannels = reply.readInt32();
149        *pFormat = reply.readInt32();
150        return interface_cast<IMemory>(reply.readStrongBinder());
151    }
152
153    virtual sp<IOMX> getOMX() {
154        Parcel data, reply;
155        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
156        remote()->transact(GET_OMX, data, &reply);
157        return interface_cast<IOMX>(reply.readStrongBinder());
158    }
159};
160
161IMPLEMENT_META_INTERFACE(MediaPlayerService, "android.media.IMediaPlayerService");
162
163// ----------------------------------------------------------------------
164
165status_t BnMediaPlayerService::onTransact(
166    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
167{
168    switch(code) {
169        case CREATE_URL: {
170            CHECK_INTERFACE(IMediaPlayerService, data, reply);
171            pid_t pid = data.readInt32();
172            sp<IMediaPlayerClient> client =
173                interface_cast<IMediaPlayerClient>(data.readStrongBinder());
174            const char* url = data.readCString();
175
176            KeyedVector<String8, String8> headers;
177            int32_t numHeaders = data.readInt32();
178            for (int i = 0; i < numHeaders; ++i) {
179                String8 key = data.readString8();
180                String8 value = data.readString8();
181                headers.add(key, value);
182            }
183            int audioSessionId = data.readInt32();
184
185            sp<IMediaPlayer> player = create(
186                    pid, client, url, numHeaders > 0 ? &headers : NULL, audioSessionId);
187
188            reply->writeStrongBinder(player->asBinder());
189            return NO_ERROR;
190        } break;
191        case CREATE_FD: {
192            CHECK_INTERFACE(IMediaPlayerService, data, reply);
193            pid_t pid = data.readInt32();
194            sp<IMediaPlayerClient> client = interface_cast<IMediaPlayerClient>(data.readStrongBinder());
195            int fd = dup(data.readFileDescriptor());
196            int64_t offset = data.readInt64();
197            int64_t length = data.readInt64();
198            int audioSessionId = data.readInt32();
199
200            sp<IMediaPlayer> player = create(pid, client, fd, offset, length, audioSessionId);
201            reply->writeStrongBinder(player->asBinder());
202            return NO_ERROR;
203        } break;
204        case CREATE_STREAM:
205        {
206            CHECK_INTERFACE(IMediaPlayerService, data, reply);
207
208            pid_t pid = static_cast<pid_t>(data.readInt32());
209
210            sp<IMediaPlayerClient> client =
211                interface_cast<IMediaPlayerClient>(data.readStrongBinder());
212
213            sp<IStreamSource> source =
214                interface_cast<IStreamSource>(data.readStrongBinder());
215
216            int audioSessionId = static_cast<int>(data.readInt32());
217
218            sp<IMediaPlayer> player =
219                create(pid, client, source, audioSessionId);
220
221            reply->writeStrongBinder(player->asBinder());
222            return OK;
223            break;
224        }
225        case DECODE_URL: {
226            CHECK_INTERFACE(IMediaPlayerService, data, reply);
227            const char* url = data.readCString();
228            uint32_t sampleRate;
229            int numChannels;
230            int format;
231            sp<IMemory> player = decode(url, &sampleRate, &numChannels, &format);
232            reply->writeInt32(sampleRate);
233            reply->writeInt32(numChannels);
234            reply->writeInt32(format);
235            reply->writeStrongBinder(player->asBinder());
236            return NO_ERROR;
237        } break;
238        case DECODE_FD: {
239            CHECK_INTERFACE(IMediaPlayerService, data, reply);
240            int fd = dup(data.readFileDescriptor());
241            int64_t offset = data.readInt64();
242            int64_t length = data.readInt64();
243            uint32_t sampleRate;
244            int numChannels;
245            int format;
246            sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format);
247            reply->writeInt32(sampleRate);
248            reply->writeInt32(numChannels);
249            reply->writeInt32(format);
250            reply->writeStrongBinder(player->asBinder());
251            return NO_ERROR;
252        } break;
253        case CREATE_MEDIA_RECORDER: {
254            CHECK_INTERFACE(IMediaPlayerService, data, reply);
255            pid_t pid = data.readInt32();
256            sp<IMediaRecorder> recorder = createMediaRecorder(pid);
257            reply->writeStrongBinder(recorder->asBinder());
258            return NO_ERROR;
259        } break;
260        case CREATE_METADATA_RETRIEVER: {
261            CHECK_INTERFACE(IMediaPlayerService, data, reply);
262            pid_t pid = data.readInt32();
263            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid);
264            reply->writeStrongBinder(retriever->asBinder());
265            return NO_ERROR;
266        } break;
267        case GET_OMX: {
268            CHECK_INTERFACE(IMediaPlayerService, data, reply);
269            sp<IOMX> omx = getOMX();
270            reply->writeStrongBinder(omx->asBinder());
271            return NO_ERROR;
272        } break;
273        default:
274            return BBinder::onTransact(code, data, reply, flags);
275    }
276}
277
278// ----------------------------------------------------------------------------
279
280}; // namespace android
281