IMediaPlayerService.cpp revision 2db8455d8f4468a637109d31f319ce02d9d743ec 
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) {
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
79        remote()->transact(CREATE_URL, data, &reply);
80        return interface_cast<IMediaPlayer>(reply.readStrongBinder());
81    }
82
83    virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid)
84    {
85        Parcel data, reply;
86        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
87        data.writeInt32(pid);
88        remote()->transact(CREATE_MEDIA_RECORDER, data, &reply);
89        return interface_cast<IMediaRecorder>(reply.readStrongBinder());
90    }
91
92    virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length)
93    {
94        Parcel data, reply;
95        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
96        data.writeInt32(pid);
97        data.writeStrongBinder(client->asBinder());
98        data.writeFileDescriptor(fd);
99        data.writeInt64(offset);
100        data.writeInt64(length);
101        remote()->transact(CREATE_FD, data, &reply);
102        return interface_cast<IMediaPlayer>(reply.readStrongBinder());
103    }
104
105    virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
106    {
107        Parcel data, reply;
108        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
109        data.writeCString(url);
110        remote()->transact(DECODE_URL, data, &reply);
111        *pSampleRate = uint32_t(reply.readInt32());
112        *pNumChannels = reply.readInt32();
113        *pFormat = reply.readInt32();
114        return interface_cast<IMemory>(reply.readStrongBinder());
115    }
116
117    virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
118    {
119        Parcel data, reply;
120        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
121        data.writeFileDescriptor(fd);
122        data.writeInt64(offset);
123        data.writeInt64(length);
124        remote()->transact(DECODE_FD, data, &reply);
125        *pSampleRate = uint32_t(reply.readInt32());
126        *pNumChannels = reply.readInt32();
127        *pFormat = reply.readInt32();
128        return interface_cast<IMemory>(reply.readStrongBinder());
129    }
130
131    virtual sp<IMemory> snoop()
132    {
133        Parcel data, reply;
134        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
135        remote()->transact(SNOOP, data, &reply);
136        return interface_cast<IMemory>(reply.readStrongBinder());
137    }
138
139    virtual sp<IOMX> getOMX() {
140        Parcel data, reply;
141        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
142        remote()->transact(GET_OMX, data, &reply);
143        return interface_cast<IOMX>(reply.readStrongBinder());
144    }
145};
146
147IMPLEMENT_META_INTERFACE(MediaPlayerService, "android.media.IMediaPlayerService");
148
149// ----------------------------------------------------------------------
150
151status_t BnMediaPlayerService::onTransact(
152    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
153{
154    switch(code) {
155        case CREATE_URL: {
156            CHECK_INTERFACE(IMediaPlayerService, data, reply);
157            pid_t pid = data.readInt32();
158            sp<IMediaPlayerClient> client =
159                interface_cast<IMediaPlayerClient>(data.readStrongBinder());
160            const char* url = data.readCString();
161
162            KeyedVector<String8, String8> headers;
163            int32_t numHeaders = data.readInt32();
164            for (int i = 0; i < numHeaders; ++i) {
165                String8 key = data.readString8();
166                String8 value = data.readString8();
167                headers.add(key, value);
168            }
169
170            sp<IMediaPlayer> player = create(
171                    pid, client, url, numHeaders > 0 ? &headers : NULL);
172
173            reply->writeStrongBinder(player->asBinder());
174            return NO_ERROR;
175        } break;
176        case CREATE_FD: {
177            CHECK_INTERFACE(IMediaPlayerService, data, reply);
178            pid_t pid = data.readInt32();
179            sp<IMediaPlayerClient> client = interface_cast<IMediaPlayerClient>(data.readStrongBinder());
180            int fd = dup(data.readFileDescriptor());
181            int64_t offset = data.readInt64();
182            int64_t length = data.readInt64();
183            sp<IMediaPlayer> player = create(pid, client, fd, offset, length);
184            reply->writeStrongBinder(player->asBinder());
185            return NO_ERROR;
186        } break;
187        case DECODE_URL: {
188            CHECK_INTERFACE(IMediaPlayerService, data, reply);
189            const char* url = data.readCString();
190            uint32_t sampleRate;
191            int numChannels;
192            int format;
193            sp<IMemory> player = decode(url, &sampleRate, &numChannels, &format);
194            reply->writeInt32(sampleRate);
195            reply->writeInt32(numChannels);
196            reply->writeInt32(format);
197            reply->writeStrongBinder(player->asBinder());
198            return NO_ERROR;
199        } break;
200        case DECODE_FD: {
201            CHECK_INTERFACE(IMediaPlayerService, data, reply);
202            int fd = dup(data.readFileDescriptor());
203            int64_t offset = data.readInt64();
204            int64_t length = data.readInt64();
205            uint32_t sampleRate;
206            int numChannels;
207            int format;
208            sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format);
209            reply->writeInt32(sampleRate);
210            reply->writeInt32(numChannels);
211            reply->writeInt32(format);
212            reply->writeStrongBinder(player->asBinder());
213            return NO_ERROR;
214        } break;
215        case SNOOP: {
216            CHECK_INTERFACE(IMediaPlayerService, data, reply);
217            sp<IMemory> snooped_audio = snoop();
218            reply->writeStrongBinder(snooped_audio->asBinder());
219            return NO_ERROR;
220        } break;
221        case CREATE_MEDIA_RECORDER: {
222            CHECK_INTERFACE(IMediaPlayerService, data, reply);
223            pid_t pid = data.readInt32();
224            sp<IMediaRecorder> recorder = createMediaRecorder(pid);
225            reply->writeStrongBinder(recorder->asBinder());
226            return NO_ERROR;
227        } break;
228        case CREATE_METADATA_RETRIEVER: {
229            CHECK_INTERFACE(IMediaPlayerService, data, reply);
230            pid_t pid = data.readInt32();
231            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid);
232            reply->writeStrongBinder(retriever->asBinder());
233            return NO_ERROR;
234        } break;
235        case GET_OMX: {
236            CHECK_INTERFACE(IMediaPlayerService, data, reply);
237            sp<IOMX> omx = getOMX();
238            reply->writeStrongBinder(omx->asBinder());
239            return NO_ERROR;
240        } break;
241        default:
242            return BBinder::onTransact(code, data, reply, flags);
243    }
244}
245
246// ----------------------------------------------------------------------------
247
248}; // namespace android
249