IMediaPlayerService.cpp revision a514bdb58b5de4986679f72b7204b4764f7a2778 
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
27#include <utils/Errors.h>  // for status_t
28
29namespace android {
30
31enum {
32    CREATE_URL = IBinder::FIRST_CALL_TRANSACTION,
33    CREATE_FD,
34    DECODE_URL,
35    DECODE_FD,
36    CREATE_MEDIA_RECORDER,
37    CREATE_METADATA_RETRIEVER,
38    GET_OMX,
39    SNOOP
40};
41
42class BpMediaPlayerService: public BpInterface<IMediaPlayerService>
43{
44public:
45    BpMediaPlayerService(const sp<IBinder>& impl)
46        : BpInterface<IMediaPlayerService>(impl)
47    {
48    }
49
50    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid)
51    {
52        Parcel data, reply;
53        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
54        data.writeInt32(pid);
55        remote()->transact(CREATE_METADATA_RETRIEVER, data, &reply);
56        return interface_cast<IMediaMetadataRetriever>(reply.readStrongBinder());
57    }
58
59    virtual sp<IMediaPlayer> create(
60            pid_t pid, const sp<IMediaPlayerClient>& client,
61            const char* url, const KeyedVector<String8, String8> *headers, int audioSessionId) {
62        Parcel data, reply;
63        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
64        data.writeInt32(pid);
65        data.writeStrongBinder(client->asBinder());
66        data.writeCString(url);
67
68        if (headers == NULL) {
69            data.writeInt32(0);
70        } else {
71            // serialize the headers
72            data.writeInt32(headers->size());
73            for (size_t i = 0; i < headers->size(); ++i) {
74                data.writeString8(headers->keyAt(i));
75                data.writeString8(headers->valueAt(i));
76            }
77        }
78        data.writeInt32(audioSessionId);
79
80        remote()->transact(CREATE_URL, data, &reply);
81
82        return interface_cast<IMediaPlayer>(reply.readStrongBinder());
83    }
84
85    virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid)
86    {
87        Parcel data, reply;
88        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
89        data.writeInt32(pid);
90        remote()->transact(CREATE_MEDIA_RECORDER, data, &reply);
91        return interface_cast<IMediaRecorder>(reply.readStrongBinder());
92    }
93
94    virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd,
95            int64_t offset, int64_t length, int audioSessionId)
96    {
97        Parcel data, reply;
98        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
99        data.writeInt32(pid);
100        data.writeStrongBinder(client->asBinder());
101        data.writeFileDescriptor(fd);
102        data.writeInt64(offset);
103        data.writeInt64(length);
104        data.writeInt32(audioSessionId);
105
106        remote()->transact(CREATE_FD, data, &reply);
107
108        return interface_cast<IMediaPlayer>(reply.readStrongBinder());;
109    }
110
111    virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
112    {
113        Parcel data, reply;
114        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
115        data.writeCString(url);
116        remote()->transact(DECODE_URL, data, &reply);
117        *pSampleRate = uint32_t(reply.readInt32());
118        *pNumChannels = reply.readInt32();
119        *pFormat = reply.readInt32();
120        return interface_cast<IMemory>(reply.readStrongBinder());
121    }
122
123    virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
124    {
125        Parcel data, reply;
126        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
127        data.writeFileDescriptor(fd);
128        data.writeInt64(offset);
129        data.writeInt64(length);
130        remote()->transact(DECODE_FD, data, &reply);
131        *pSampleRate = uint32_t(reply.readInt32());
132        *pNumChannels = reply.readInt32();
133        *pFormat = reply.readInt32();
134        return interface_cast<IMemory>(reply.readStrongBinder());
135    }
136
137    virtual sp<IMemory> snoop()
138    {
139        Parcel data, reply;
140        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
141        remote()->transact(SNOOP, data, &reply);
142        return interface_cast<IMemory>(reply.readStrongBinder());
143    }
144
145    virtual sp<IOMX> getOMX() {
146        Parcel data, reply;
147        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
148        remote()->transact(GET_OMX, data, &reply);
149        return interface_cast<IOMX>(reply.readStrongBinder());
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_URL: {
162            CHECK_INTERFACE(IMediaPlayerService, data, reply);
163            pid_t pid = data.readInt32();
164            sp<IMediaPlayerClient> client =
165                interface_cast<IMediaPlayerClient>(data.readStrongBinder());
166            const char* url = data.readCString();
167
168            KeyedVector<String8, String8> headers;
169            int32_t numHeaders = data.readInt32();
170            for (int i = 0; i < numHeaders; ++i) {
171                String8 key = data.readString8();
172                String8 value = data.readString8();
173                headers.add(key, value);
174            }
175            int audioSessionId = data.readInt32();
176
177            sp<IMediaPlayer> player = create(
178                    pid, client, url, numHeaders > 0 ? &headers : NULL, audioSessionId);
179
180            reply->writeStrongBinder(player->asBinder());
181            return NO_ERROR;
182        } break;
183        case CREATE_FD: {
184            CHECK_INTERFACE(IMediaPlayerService, data, reply);
185            pid_t pid = data.readInt32();
186            sp<IMediaPlayerClient> client = interface_cast<IMediaPlayerClient>(data.readStrongBinder());
187            int fd = dup(data.readFileDescriptor());
188            int64_t offset = data.readInt64();
189            int64_t length = data.readInt64();
190            int audioSessionId = data.readInt32();
191
192            sp<IMediaPlayer> player = create(pid, client, fd, offset, length, audioSessionId);
193            reply->writeStrongBinder(player->asBinder());
194            return NO_ERROR;
195        } break;
196        case DECODE_URL: {
197            CHECK_INTERFACE(IMediaPlayerService, data, reply);
198            const char* url = data.readCString();
199            uint32_t sampleRate;
200            int numChannels;
201            int format;
202            sp<IMemory> player = decode(url, &sampleRate, &numChannels, &format);
203            reply->writeInt32(sampleRate);
204            reply->writeInt32(numChannels);
205            reply->writeInt32(format);
206            reply->writeStrongBinder(player->asBinder());
207            return NO_ERROR;
208        } break;
209        case DECODE_FD: {
210            CHECK_INTERFACE(IMediaPlayerService, data, reply);
211            int fd = dup(data.readFileDescriptor());
212            int64_t offset = data.readInt64();
213            int64_t length = data.readInt64();
214            uint32_t sampleRate;
215            int numChannels;
216            int format;
217            sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format);
218            reply->writeInt32(sampleRate);
219            reply->writeInt32(numChannels);
220            reply->writeInt32(format);
221            reply->writeStrongBinder(player->asBinder());
222            return NO_ERROR;
223        } break;
224        case SNOOP: {
225            CHECK_INTERFACE(IMediaPlayerService, data, reply);
226            sp<IMemory> snooped_audio = snoop();
227            reply->writeStrongBinder(snooped_audio->asBinder());
228            return NO_ERROR;
229        } break;
230        case CREATE_MEDIA_RECORDER: {
231            CHECK_INTERFACE(IMediaPlayerService, data, reply);
232            pid_t pid = data.readInt32();
233            sp<IMediaRecorder> recorder = createMediaRecorder(pid);
234            reply->writeStrongBinder(recorder->asBinder());
235            return NO_ERROR;
236        } break;
237        case CREATE_METADATA_RETRIEVER: {
238            CHECK_INTERFACE(IMediaPlayerService, data, reply);
239            pid_t pid = data.readInt32();
240            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid);
241            reply->writeStrongBinder(retriever->asBinder());
242            return NO_ERROR;
243        } break;
244        case GET_OMX: {
245            CHECK_INTERFACE(IMediaPlayerService, data, reply);
246            sp<IOMX> omx = getOMX();
247            reply->writeStrongBinder(omx->asBinder());
248            return NO_ERROR;
249        } break;
250        default:
251            return BBinder::onTransact(code, data, reply, flags);
252    }
253}
254
255// ----------------------------------------------------------------------------
256
257}; // namespace android
258