IMediaPlayerService.cpp revision ed3e3e046840d5bf1ca84a8c0cc097425e89d6d6 
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/IStreamSource.h>
28
29#include <utils/Errors.h>  // for status_t
30
31namespace android {
32
33enum {
34    CREATE = IBinder::FIRST_CALL_TRANSACTION,
35    DECODE_URL,
36    DECODE_FD,
37    CREATE_MEDIA_RECORDER,
38    CREATE_METADATA_RETRIEVER,
39    GET_OMX,
40    MAKE_CRYPTO,
41    ADD_BATTERY_DATA,
42    PULL_BATTERY_DATA
43};
44
45class BpMediaPlayerService: public BpInterface<IMediaPlayerService>
46{
47public:
48    BpMediaPlayerService(const sp<IBinder>& impl)
49        : BpInterface<IMediaPlayerService>(impl)
50    {
51    }
52
53    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid)
54    {
55        Parcel data, reply;
56        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
57        data.writeInt32(pid);
58        remote()->transact(CREATE_METADATA_RETRIEVER, data, &reply);
59        return interface_cast<IMediaMetadataRetriever>(reply.readStrongBinder());
60    }
61
62    virtual sp<IMediaPlayer> create(
63            pid_t pid, const sp<IMediaPlayerClient>& client, int audioSessionId) {
64        Parcel data, reply;
65        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
66        data.writeInt32(pid);
67        data.writeStrongBinder(client->asBinder());
68        data.writeInt32(audioSessionId);
69
70        remote()->transact(CREATE, data, &reply);
71        return interface_cast<IMediaPlayer>(reply.readStrongBinder());
72    }
73
74    virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid)
75    {
76        Parcel data, reply;
77        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
78        data.writeInt32(pid);
79        remote()->transact(CREATE_MEDIA_RECORDER, data, &reply);
80        return interface_cast<IMediaRecorder>(reply.readStrongBinder());
81    }
82
83    virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat)
84    {
85        Parcel data, reply;
86        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
87        data.writeCString(url);
88        remote()->transact(DECODE_URL, data, &reply);
89        *pSampleRate = uint32_t(reply.readInt32());
90        *pNumChannels = reply.readInt32();
91        *pFormat = (audio_format_t) reply.readInt32();
92        return interface_cast<IMemory>(reply.readStrongBinder());
93    }
94
95    virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, audio_format_t* pFormat)
96    {
97        Parcel data, reply;
98        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
99        data.writeFileDescriptor(fd);
100        data.writeInt64(offset);
101        data.writeInt64(length);
102        remote()->transact(DECODE_FD, data, &reply);
103        *pSampleRate = uint32_t(reply.readInt32());
104        *pNumChannels = reply.readInt32();
105        *pFormat = (audio_format_t) reply.readInt32();
106        return interface_cast<IMemory>(reply.readStrongBinder());
107    }
108
109    virtual sp<IOMX> getOMX() {
110        Parcel data, reply;
111        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
112        remote()->transact(GET_OMX, data, &reply);
113        return interface_cast<IOMX>(reply.readStrongBinder());
114    }
115
116    virtual sp<ICrypto> makeCrypto() {
117        Parcel data, reply;
118        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
119        remote()->transact(MAKE_CRYPTO, data, &reply);
120        return interface_cast<ICrypto>(reply.readStrongBinder());
121    }
122
123    virtual void addBatteryData(uint32_t params) {
124        Parcel data, reply;
125        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
126        data.writeInt32(params);
127        remote()->transact(ADD_BATTERY_DATA, data, &reply);
128    }
129
130    virtual status_t pullBatteryData(Parcel* reply) {
131        Parcel data;
132        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
133        return remote()->transact(PULL_BATTERY_DATA, data, reply);
134    }
135};
136
137IMPLEMENT_META_INTERFACE(MediaPlayerService, "android.media.IMediaPlayerService");
138
139// ----------------------------------------------------------------------
140
141status_t BnMediaPlayerService::onTransact(
142    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
143{
144    switch (code) {
145        case CREATE: {
146            CHECK_INTERFACE(IMediaPlayerService, data, reply);
147            pid_t pid = data.readInt32();
148            sp<IMediaPlayerClient> client =
149                interface_cast<IMediaPlayerClient>(data.readStrongBinder());
150            int audioSessionId = data.readInt32();
151            sp<IMediaPlayer> player = create(pid, client, audioSessionId);
152            reply->writeStrongBinder(player->asBinder());
153            return NO_ERROR;
154        } break;
155        case DECODE_URL: {
156            CHECK_INTERFACE(IMediaPlayerService, data, reply);
157            const char* url = data.readCString();
158            uint32_t sampleRate;
159            int numChannels;
160            audio_format_t format;
161            sp<IMemory> player = decode(url, &sampleRate, &numChannels, &format);
162            reply->writeInt32(sampleRate);
163            reply->writeInt32(numChannels);
164            reply->writeInt32((int32_t) format);
165            reply->writeStrongBinder(player->asBinder());
166            return NO_ERROR;
167        } break;
168        case DECODE_FD: {
169            CHECK_INTERFACE(IMediaPlayerService, data, reply);
170            int fd = dup(data.readFileDescriptor());
171            int64_t offset = data.readInt64();
172            int64_t length = data.readInt64();
173            uint32_t sampleRate;
174            int numChannels;
175            audio_format_t format;
176            sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format);
177            reply->writeInt32(sampleRate);
178            reply->writeInt32(numChannels);
179            reply->writeInt32((int32_t) format);
180            reply->writeStrongBinder(player->asBinder());
181            return NO_ERROR;
182        } break;
183        case CREATE_MEDIA_RECORDER: {
184            CHECK_INTERFACE(IMediaPlayerService, data, reply);
185            pid_t pid = data.readInt32();
186            sp<IMediaRecorder> recorder = createMediaRecorder(pid);
187            reply->writeStrongBinder(recorder->asBinder());
188            return NO_ERROR;
189        } break;
190        case CREATE_METADATA_RETRIEVER: {
191            CHECK_INTERFACE(IMediaPlayerService, data, reply);
192            pid_t pid = data.readInt32();
193            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid);
194            reply->writeStrongBinder(retriever->asBinder());
195            return NO_ERROR;
196        } break;
197        case GET_OMX: {
198            CHECK_INTERFACE(IMediaPlayerService, data, reply);
199            sp<IOMX> omx = getOMX();
200            reply->writeStrongBinder(omx->asBinder());
201            return NO_ERROR;
202        } break;
203        case MAKE_CRYPTO: {
204            CHECK_INTERFACE(IMediaPlayerService, data, reply);
205            sp<ICrypto> crypto = makeCrypto();
206            reply->writeStrongBinder(crypto->asBinder());
207            return NO_ERROR;
208        } break;
209        case ADD_BATTERY_DATA: {
210            CHECK_INTERFACE(IMediaPlayerService, data, reply);
211            uint32_t params = data.readInt32();
212            addBatteryData(params);
213            return NO_ERROR;
214        } break;
215        case PULL_BATTERY_DATA: {
216            CHECK_INTERFACE(IMediaPlayerService, data, reply);
217            pullBatteryData(reply);
218            return NO_ERROR;
219        } break;
220        default:
221            return BBinder::onTransact(code, data, reply, flags);
222    }
223}
224
225// ----------------------------------------------------------------------------
226
227}; // namespace android
228