IMediaPlayerService.cpp revision 56f0cc533a38bdb84bc03adcb43515614ab21bae 
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#include <binder/Parcel.h>
21
22#include <binder/IMemory.h>
23#include <media/IMediaPlayerService.h>
24#include <media/IMediaRecorder.h>
25
26namespace android {
27
28enum {
29    CREATE_URL = IBinder::FIRST_CALL_TRANSACTION,
30    CREATE_FD,
31    DECODE_URL,
32    DECODE_FD,
33    CREATE_MEDIA_RECORDER,
34    CREATE_METADATA_RETRIEVER,
35};
36
37class BpMediaPlayerService: public BpInterface<IMediaPlayerService>
38{
39public:
40    BpMediaPlayerService(const sp<IBinder>& impl)
41        : BpInterface<IMediaPlayerService>(impl)
42    {
43    }
44
45    virtual sp<IMediaMetadataRetriever> createMetadataRetriever(pid_t pid)
46    {
47        Parcel data, reply;
48        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
49        data.writeInt32(pid);
50        remote()->transact(CREATE_METADATA_RETRIEVER, data, &reply);
51        return interface_cast<IMediaMetadataRetriever>(reply.readStrongBinder());
52    }
53
54    virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, const char* url)
55    {
56        Parcel data, reply;
57        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
58        data.writeInt32(pid);
59        data.writeStrongBinder(client->asBinder());
60        data.writeCString(url);
61        remote()->transact(CREATE_URL, data, &reply);
62        return interface_cast<IMediaPlayer>(reply.readStrongBinder());
63    }
64
65    virtual sp<IMediaRecorder> createMediaRecorder(pid_t pid)
66    {
67        Parcel data, reply;
68        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
69        data.writeInt32(pid);
70        remote()->transact(CREATE_MEDIA_RECORDER, data, &reply);
71        return interface_cast<IMediaRecorder>(reply.readStrongBinder());
72    }
73
74    virtual sp<IMediaPlayer> create(pid_t pid, const sp<IMediaPlayerClient>& client, int fd, int64_t offset, int64_t length)
75    {
76        Parcel data, reply;
77        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
78        data.writeInt32(pid);
79        data.writeStrongBinder(client->asBinder());
80        data.writeFileDescriptor(fd);
81        data.writeInt64(offset);
82        data.writeInt64(length);
83        remote()->transact(CREATE_FD, data, &reply);
84        return interface_cast<IMediaPlayer>(reply.readStrongBinder());
85    }
86
87    virtual sp<IMemory> decode(const char* url, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
88    {
89        Parcel data, reply;
90        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
91        data.writeCString(url);
92        remote()->transact(DECODE_URL, data, &reply);
93        *pSampleRate = uint32_t(reply.readInt32());
94        *pNumChannels = reply.readInt32();
95        *pFormat = reply.readInt32();
96        return interface_cast<IMemory>(reply.readStrongBinder());
97    }
98
99    virtual sp<IMemory> decode(int fd, int64_t offset, int64_t length, uint32_t *pSampleRate, int* pNumChannels, int* pFormat)
100    {
101        Parcel data, reply;
102        data.writeInterfaceToken(IMediaPlayerService::getInterfaceDescriptor());
103        data.writeFileDescriptor(fd);
104        data.writeInt64(offset);
105        data.writeInt64(length);
106        remote()->transact(DECODE_FD, data, &reply);
107        *pSampleRate = uint32_t(reply.readInt32());
108        *pNumChannels = reply.readInt32();
109        *pFormat = reply.readInt32();
110        return interface_cast<IMemory>(reply.readStrongBinder());
111    }
112};
113
114IMPLEMENT_META_INTERFACE(MediaPlayerService, "android.media.IMediaPlayerService");
115
116// ----------------------------------------------------------------------
117
118status_t BnMediaPlayerService::onTransact(
119    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
120{
121    switch(code) {
122        case CREATE_URL: {
123            CHECK_INTERFACE(IMediaPlayerService, data, reply);
124            pid_t pid = data.readInt32();
125            sp<IMediaPlayerClient> client = interface_cast<IMediaPlayerClient>(data.readStrongBinder());
126            const char* url = data.readCString();
127            sp<IMediaPlayer> player = create(pid, client, url);
128            reply->writeStrongBinder(player->asBinder());
129            return NO_ERROR;
130        } break;
131        case CREATE_FD: {
132            CHECK_INTERFACE(IMediaPlayerService, data, reply);
133            pid_t pid = data.readInt32();
134            sp<IMediaPlayerClient> client = interface_cast<IMediaPlayerClient>(data.readStrongBinder());
135            int fd = dup(data.readFileDescriptor());
136            int64_t offset = data.readInt64();
137            int64_t length = data.readInt64();
138            sp<IMediaPlayer> player = create(pid, client, fd, offset, length);
139            reply->writeStrongBinder(player->asBinder());
140            return NO_ERROR;
141        } break;
142        case DECODE_URL: {
143            CHECK_INTERFACE(IMediaPlayerService, data, reply);
144            const char* url = data.readCString();
145            uint32_t sampleRate;
146            int numChannels;
147            int format;
148            sp<IMemory> player = decode(url, &sampleRate, &numChannels, &format);
149            reply->writeInt32(sampleRate);
150            reply->writeInt32(numChannels);
151            reply->writeInt32(format);
152            reply->writeStrongBinder(player->asBinder());
153            return NO_ERROR;
154        } break;
155        case DECODE_FD: {
156            CHECK_INTERFACE(IMediaPlayerService, data, reply);
157            int fd = dup(data.readFileDescriptor());
158            int64_t offset = data.readInt64();
159            int64_t length = data.readInt64();
160            uint32_t sampleRate;
161            int numChannels;
162            int format;
163            sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format);
164            reply->writeInt32(sampleRate);
165            reply->writeInt32(numChannels);
166            reply->writeInt32(format);
167            reply->writeStrongBinder(player->asBinder());
168            return NO_ERROR;
169        } break;
170        case CREATE_MEDIA_RECORDER: {
171            CHECK_INTERFACE(IMediaPlayerService, data, reply);
172            pid_t pid = data.readInt32();
173            sp<IMediaRecorder> recorder = createMediaRecorder(pid);
174            reply->writeStrongBinder(recorder->asBinder());
175            return NO_ERROR;
176        } break;
177        case CREATE_METADATA_RETRIEVER: {
178            CHECK_INTERFACE(IMediaPlayerService, data, reply);
179            pid_t pid = data.readInt32();
180            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid);
181            reply->writeStrongBinder(retriever->asBinder());
182            return NO_ERROR;
183        } break;
184        default:
185            return BBinder::onTransact(code, data, reply, flags);
186    }
187}
188
189// ----------------------------------------------------------------------------
190
191}; // namespace android
192