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 //#define LOG_NDEBUG 0
19 #define LOG_TAG "ICameraClient"
20 #include <utils/Log.h>
21 #include <stdint.h>
22 #include <sys/types.h>
23 #include <camera/CameraUtils.h>
24 #include <android/hardware/ICameraClient.h>
25 #include <media/hardware/HardwareAPI.h>
26 
27 namespace android {
28 namespace hardware {
29 
30 enum {
31     NOTIFY_CALLBACK = IBinder::FIRST_CALL_TRANSACTION,
32     DATA_CALLBACK,
33     DATA_CALLBACK_TIMESTAMP,
34     RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP,
35     RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP_BATCH,
36 };
37 
38 class BpCameraClient: public BpInterface<ICameraClient>
39 {
40 public:
BpCameraClient(const sp<IBinder> & impl)41     explicit BpCameraClient(const sp<IBinder>& impl)
42         : BpInterface<ICameraClient>(impl)
43     {
44     }
45 
46     // generic callback from camera service to app
notifyCallback(int32_t msgType,int32_t ext1,int32_t ext2)47     void notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2)
48     {
49         ALOGV("notifyCallback");
50         Parcel data, reply;
51         data.writeInterfaceToken(ICameraClient::getInterfaceDescriptor());
52         data.writeInt32(msgType);
53         data.writeInt32(ext1);
54         data.writeInt32(ext2);
55         remote()->transact(NOTIFY_CALLBACK, data, &reply, IBinder::FLAG_ONEWAY);
56     }
57 
58     // generic data callback from camera service to app with image data
dataCallback(int32_t msgType,const sp<IMemory> & imageData,camera_frame_metadata_t * metadata)59     void dataCallback(int32_t msgType, const sp<IMemory>& imageData,
60                       camera_frame_metadata_t *metadata)
61     {
62         ALOGV("dataCallback");
63         Parcel data, reply;
64         data.writeInterfaceToken(ICameraClient::getInterfaceDescriptor());
65         data.writeInt32(msgType);
66         data.writeStrongBinder(IInterface::asBinder(imageData));
67         if (metadata) {
68             data.writeInt32(metadata->number_of_faces);
69             data.write(metadata->faces, sizeof(camera_face_t) * metadata->number_of_faces);
70         }
71         remote()->transact(DATA_CALLBACK, data, &reply, IBinder::FLAG_ONEWAY);
72     }
73 
74     // generic data callback from camera service to app with image data
dataCallbackTimestamp(nsecs_t timestamp,int32_t msgType,const sp<IMemory> & imageData)75     void dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& imageData)
76     {
77         ALOGV("dataCallback");
78         Parcel data, reply;
79         data.writeInterfaceToken(ICameraClient::getInterfaceDescriptor());
80         data.writeInt64(timestamp);
81         data.writeInt32(msgType);
82         data.writeStrongBinder(IInterface::asBinder(imageData));
83         remote()->transact(DATA_CALLBACK_TIMESTAMP, data, &reply, IBinder::FLAG_ONEWAY);
84     }
85 
recordingFrameHandleCallbackTimestamp(nsecs_t timestamp,native_handle_t * handle)86     void recordingFrameHandleCallbackTimestamp(nsecs_t timestamp, native_handle_t* handle) {
87         ALOGV("recordingFrameHandleCallbackTimestamp");
88         Parcel data, reply;
89         data.writeInterfaceToken(ICameraClient::getInterfaceDescriptor());
90         data.writeInt64(timestamp);
91         data.writeNativeHandle(handle);
92         remote()->transact(RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP, data, &reply,
93                 IBinder::FLAG_ONEWAY);
94     }
95 
recordingFrameHandleCallbackTimestampBatch(const std::vector<nsecs_t> & timestamps,const std::vector<native_handle_t * > & handles)96     void recordingFrameHandleCallbackTimestampBatch(
97             const std::vector<nsecs_t>& timestamps,
98             const std::vector<native_handle_t*>& handles) {
99         ALOGV("recordingFrameHandleCallbackTimestampBatch");
100         Parcel data, reply;
101         data.writeInterfaceToken(ICameraClient::getInterfaceDescriptor());
102         uint32_t n = timestamps.size();
103         if (n != handles.size()) {
104             ALOGE("%s: size of timestamps(%zu) and handles(%zu) mismatch!",
105                     __FUNCTION__, timestamps.size(), handles.size());
106             return;
107         }
108         data.writeUint32(n);
109         for (auto ts : timestamps) {
110             data.writeInt64(ts);
111         }
112         for (auto& handle : handles) {
113             data.writeNativeHandle(handle);
114         }
115         remote()->transact(RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP_BATCH, data, &reply,
116                 IBinder::FLAG_ONEWAY);
117     }
118 };
119 
120 IMPLEMENT_META_INTERFACE(CameraClient, "android.hardware.ICameraClient");
121 
122 // ----------------------------------------------------------------------
123 
onTransact(uint32_t code,const Parcel & data,Parcel * reply,uint32_t flags)124 status_t BnCameraClient::onTransact(
125     uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags)
126 {
127     switch(code) {
128         case NOTIFY_CALLBACK: {
129             ALOGV("NOTIFY_CALLBACK");
130             CHECK_INTERFACE(ICameraClient, data, reply);
131             int32_t msgType = data.readInt32();
132             int32_t ext1 = data.readInt32();
133             int32_t ext2 = data.readInt32();
134             notifyCallback(msgType, ext1, ext2);
135             return NO_ERROR;
136         } break;
137         case DATA_CALLBACK: {
138             ALOGV("DATA_CALLBACK");
139             CHECK_INTERFACE(ICameraClient, data, reply);
140             int32_t msgType = data.readInt32();
141             sp<IMemory> imageData = interface_cast<IMemory>(data.readStrongBinder());
142             camera_frame_metadata_t metadata;
143             if (data.dataAvail() > 0) {
144                 metadata.number_of_faces = data.readInt32();
145                 if (metadata.number_of_faces <= 0 ||
146                         metadata.number_of_faces > (int32_t)(INT32_MAX / sizeof(camera_face_t))) {
147                     ALOGE("%s: Too large face count: %d", __FUNCTION__, metadata.number_of_faces);
148                     return BAD_VALUE;
149                 }
150                 metadata.faces = (camera_face_t *) data.readInplace(
151                         sizeof(camera_face_t) * metadata.number_of_faces);
152             }
153             dataCallback(msgType, imageData, &metadata);
154             return NO_ERROR;
155         } break;
156         case DATA_CALLBACK_TIMESTAMP: {
157             ALOGV("DATA_CALLBACK_TIMESTAMP");
158             CHECK_INTERFACE(ICameraClient, data, reply);
159             nsecs_t timestamp = data.readInt64();
160             int32_t msgType = data.readInt32();
161             sp<IMemory> imageData = interface_cast<IMemory>(data.readStrongBinder());
162             dataCallbackTimestamp(timestamp, msgType, imageData);
163             return NO_ERROR;
164         } break;
165         case RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP: {
166             ALOGV("RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP");
167             CHECK_INTERFACE(ICameraClient, data, reply);
168             nsecs_t timestamp;
169             status_t res = data.readInt64(&timestamp);
170             if (res != OK) {
171                 ALOGE("%s: Failed to read timestamp: %s (%d)", __FUNCTION__, strerror(-res), res);
172                 return BAD_VALUE;
173             }
174             native_handle_t* handle = data.readNativeHandle();
175             if (handle == nullptr) {
176                 ALOGE("%s: Received a null native handle", __FUNCTION__);
177                 return BAD_VALUE;
178             }
179 
180             // The native handle will be freed in BpCamera::releaseRecordingFrameHandle.
181             recordingFrameHandleCallbackTimestamp(timestamp, handle);
182             return NO_ERROR;
183         } break;
184         case RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP_BATCH: {
185             ALOGV("RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP_BATCH");
186             CHECK_INTERFACE(ICameraClient, data, reply);
187             uint32_t n = 0;
188             status_t res = data.readUint32(&n);
189             if (res != OK) {
190                 ALOGE("%s: Failed to read batch size: %s (%d)", __FUNCTION__, strerror(-res), res);
191                 return BAD_VALUE;
192             }
193             std::vector<nsecs_t> timestamps;
194             std::vector<native_handle_t*> handles;
195             timestamps.reserve(n);
196             handles.reserve(n);
197             for (uint32_t i = 0; i < n; i++) {
198                 nsecs_t t;
199                 res = data.readInt64(&t);
200                 if (res != OK) {
201                     ALOGE("%s: Failed to read timestamp[%d]: %s (%d)",
202                             __FUNCTION__, i, strerror(-res), res);
203                     return BAD_VALUE;
204                 }
205                 timestamps.push_back(t);
206             }
207             for (uint32_t i = 0; i < n; i++) {
208                 native_handle_t* handle = data.readNativeHandle();
209                 if (handle == nullptr) {
210                     ALOGE("%s: Received a null native handle at handles[%d]",
211                             __FUNCTION__, i);
212                     return BAD_VALUE;
213                 }
214                 handles.push_back(handle);
215             }
216 
217             // The native handle will be freed in BpCamera::releaseRecordingFrameHandleBatch.
218             recordingFrameHandleCallbackTimestampBatch(timestamps, handles);
219             return NO_ERROR;
220         } break;
221         default:
222             return BBinder::onTransact(code, data, reply, flags);
223     }
224 }
225 
226 // ----------------------------------------------------------------------------
227 
228 } // namespace hardware
229 } // namespace android
230