IMediaPlayerService.cpp revision 660951867e959ebe98612742ef1f72d33ea7e9a3 
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 <utils/Parcel.h>
21
22#include <utils/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.hardware.IMediaPlayerService");
115
116// ----------------------------------------------------------------------
117
118#define CHECK_INTERFACE(interface, data, reply) \
119        do { if (!data.enforceInterface(interface::getInterfaceDescriptor())) { \
120            LOGW("Call incorrectly routed to " #interface); \
121            return PERMISSION_DENIED; \
122        } } while (0)
123
124status_t BnMediaPlayerService::onTransact(
125    uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
126{
127    switch(code) {
128        case CREATE_URL: {
129            CHECK_INTERFACE(IMediaPlayerService, data, reply);
130            pid_t pid = data.readInt32();
131            sp<IMediaPlayerClient> client = interface_cast<IMediaPlayerClient>(data.readStrongBinder());
132            const char* url = data.readCString();
133            sp<IMediaPlayer> player = create(pid, client, url);
134            reply->writeStrongBinder(player->asBinder());
135            return NO_ERROR;
136        } break;
137        case CREATE_FD: {
138            CHECK_INTERFACE(IMediaPlayerService, data, reply);
139            pid_t pid = data.readInt32();
140            sp<IMediaPlayerClient> client = interface_cast<IMediaPlayerClient>(data.readStrongBinder());
141            int fd = dup(data.readFileDescriptor());
142            int64_t offset = data.readInt64();
143            int64_t length = data.readInt64();
144            sp<IMediaPlayer> player = create(pid, client, fd, offset, length);
145            reply->writeStrongBinder(player->asBinder());
146            return NO_ERROR;
147        } break;
148        case DECODE_URL: {
149            CHECK_INTERFACE(IMediaPlayerService, data, reply);
150            const char* url = data.readCString();
151            uint32_t sampleRate;
152            int numChannels;
153            int format;
154            sp<IMemory> player = decode(url, &sampleRate, &numChannels, &format);
155            reply->writeInt32(sampleRate);
156            reply->writeInt32(numChannels);
157            reply->writeInt32(format);
158            reply->writeStrongBinder(player->asBinder());
159            return NO_ERROR;
160        } break;
161        case DECODE_FD: {
162            CHECK_INTERFACE(IMediaPlayerService, data, reply);
163            int fd = dup(data.readFileDescriptor());
164            int64_t offset = data.readInt64();
165            int64_t length = data.readInt64();
166            uint32_t sampleRate;
167            int numChannels;
168            int format;
169            sp<IMemory> player = decode(fd, offset, length, &sampleRate, &numChannels, &format);
170            reply->writeInt32(sampleRate);
171            reply->writeInt32(numChannels);
172            reply->writeInt32(format);
173            reply->writeStrongBinder(player->asBinder());
174            return NO_ERROR;
175        } break;
176        case CREATE_MEDIA_RECORDER: {
177            CHECK_INTERFACE(IMediaPlayerService, data, reply);
178            pid_t pid = data.readInt32();
179            sp<IMediaRecorder> recorder = createMediaRecorder(pid);
180            reply->writeStrongBinder(recorder->asBinder());
181            return NO_ERROR;
182        } break;
183        case CREATE_METADATA_RETRIEVER: {
184            CHECK_INTERFACE(IMediaPlayerService, data, reply);
185            pid_t pid = data.readInt32();
186            sp<IMediaMetadataRetriever> retriever = createMetadataRetriever(pid);
187            reply->writeStrongBinder(retriever->asBinder());
188            return NO_ERROR;
189        } break;
190        default:
191            return BBinder::onTransact(code, data, reply, flags);
192    }
193}
194
195// ----------------------------------------------------------------------------
196
197}; // namespace android
198