IMediaPlayerService.cpp revision e53b9ead781c36e96d6b6f012ddffc93a3d80f0d 
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 = IBinder::FIRST_CALL_TRANSACTION,
34    DECODE_URL,
35    DECODE_FD,
36    CREATE_MEDIA_RECORDER,
37    CREATE_METADATA_RETRIEVER,
38    GET_OMX,
39    ADD_BATTERY_DATA,
40    PULL_BATTERY_DATA
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, int audioSessionId) {
62        Parcel data, reply;
63        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
64        data.writeInt32(pid);
65        data.writeStrongBinder(client->asBinder());
66        data.writeInt32(audioSessionId);
67
68        remote()->transact(CREATE, data, &reply);
69        return interface_cast<IMediaPlayer>(reply.readStrongBinder());
70    }
71
72    virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid)
73    {
74        Parcel data, reply;
75        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
76        data.writeInt32(pid);
77        remote()->transact(CREATE_MEDIA_RECORDER, data, &reply);
78        return interface_cast<IMediaRecorder>(reply.readStrongBinder());
79    }
80
81    virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat)
82    {
83        Parcel data, reply;
84        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
85        data.writeCString(url);
86        remote()->transact(DECODE_URL, data, &reply);
87        *pSampleRate = uint32_t(reply.readInt32());
88        *pNumChannels = reply.readInt32();
89        *pFormat = (audio_format_t) reply.readInt32();
90        return interface_cast<IMemory>(reply.readStrongBinder());
91    }
92
93    virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat)
94    {
95        Parcel data, reply;
96        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
97        data.writeFileDescriptor(fd);
98        data.writeInt64(offset);
99        data.writeInt64(length);
100        remote()->transact(DECODE_FD, data, &reply);
101        *pSampleRate = uint32_t(reply.readInt32());
102        *pNumChannels = reply.readInt32();
103        *pFormat = (audio_format_t) reply.readInt32();
104        return interface_cast<IMemory>(reply.readStrongBinder());
105    }
106
107    virtual sp<IOMX> getOMX() {
108        Parcel data, reply;
109        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
110        remote()->transact(GET_OMX, data, &reply);
111        return interface_cast<IOMX>(reply.readStrongBinder());
112    }
113
114    virtual void addBatteryData(uint32_t params) {
115        Parcel data, reply;
116        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
117        data.writeInt32(params);
118        remote()->transact(ADD_BATTERY_DATA, data, &reply);
119    }
120
121    virtual status_t pullBatteryData(Parcel* reply) {
122        Parcel data;
123        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
124        return remote()->transact(PULL_BATTERY_DATA, data, reply);
125    }
126};
127
128IMPLEMENT_META_INTERFACE(MediaPlayerService, "android.media.IMediaPlayerService");
129
130// ----------------------------------------------------------------------
131
132status_t BnMediaPlayerService::onTransact(
133    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
134{
135    switch (code) {
136        case CREATE: {
137            CHECK_INTERFACE(IMediaPlayerService, data, reply);
138            pid_t pid = data.readInt32();
139            sp<IMediaPlayerClient> client =
140                interface_cast<IMediaPlayerClient>(data.readStrongBinder());
141            int audioSessionId = data.readInt32();
142            sp<IMediaPlayer> player = create(pid, client, audioSessionId);
143            reply->writeStrongBinder(player->asBinder());
144            return NO_ERROR;
145        } break;
146        case DECODE_URL: {
147            CHECK_INTERFACE(IMediaPlayerService, data, reply);
148            const char* url = data.readCString();
149            uint32_t sampleRate;
150            int numChannels;
151            audio_format_t format;
152            sp<IMemory> player = decode(url, &sampleRate, &numChannels, &format);
153            reply->writeInt32(sampleRate);
154            reply->writeInt32(numChannels);
155            reply->writeInt32((int32_t) format);
156            reply->writeStrongBinder(player->asBinder());
157            return NO_ERROR;
158        } break;
159        case DECODE_FD: {
160            CHECK_INTERFACE(IMediaPlayerService, data, reply);
161            int fd = dup(data.readFileDescriptor());
162            int64_t offset = data.readInt64();
163            int64_t length = data.readInt64();
164            uint32_t sampleRate;
165            int numChannels;
166            audio_format_t format;
167            sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format);
168            reply->writeInt32(sampleRate);
169            reply->writeInt32(numChannels);
170            reply->writeInt32((int32_t) format);
171            reply->writeStrongBinder(player->asBinder());
172            return NO_ERROR;
173        } break;
174        case CREATE_MEDIA_RECORDER: {
175            CHECK_INTERFACE(IMediaPlayerService, data, reply);
176            pid_t pid = data.readInt32();
177            sp<IMediaRecorder> recorder = createMediaRecorder(pid);
178            reply->writeStrongBinder(recorder->asBinder());
179            return NO_ERROR;
180        } break;
181        case CREATE_METADATA_RETRIEVER: {
182            CHECK_INTERFACE(IMediaPlayerService, data, reply);
183            pid_t pid = data.readInt32();
184            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid);
185            reply->writeStrongBinder(retriever->asBinder());
186            return NO_ERROR;
187        } break;
188        case GET_OMX: {
189            CHECK_INTERFACE(IMediaPlayerService, data, reply);
190            sp<IOMX> omx = getOMX();
191            reply->writeStrongBinder(omx->asBinder());
192            return NO_ERROR;
193        } break;
194        case ADD_BATTERY_DATA: {
195            CHECK_INTERFACE(IMediaPlayerService, data, reply);
196            uint32_t params = data.readInt32();
197            addBatteryData(params);
198            return NO_ERROR;
199        } break;
200        case PULL_BATTERY_DATA: {
201            CHECK_INTERFACE(IMediaPlayerService, data, reply);
202            pullBatteryData(reply);
203            return NO_ERROR;
204        } break;
205        default:
206            return BBinder::onTransact(code, data, reply, flags);
207    }
208}
209
210// ----------------------------------------------------------------------------
211
212}; // namespace android
213