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 = NULL;
143             if (data.dataAvail() > 0) {
144                 metadata = new camera_frame_metadata_t;
145                 metadata->number_of_faces = data.readInt32();
146                 metadata->faces = (camera_face_t *) data.readInplace(
147                         sizeof(camera_face_t) * metadata->number_of_faces);
148             }
149             dataCallback(msgType, imageData, metadata);
150             if (metadata) delete metadata;
151             return NO_ERROR;
152         } break;
153         case DATA_CALLBACK_TIMESTAMP: {
154             ALOGV("DATA_CALLBACK_TIMESTAMP");
155             CHECK_INTERFACE(ICameraClient, data, reply);
156             nsecs_t timestamp = data.readInt64();
157             int32_t msgType = data.readInt32();
158             sp<IMemory> imageData = interface_cast<IMemory>(data.readStrongBinder());
159             dataCallbackTimestamp(timestamp, msgType, imageData);
160             return NO_ERROR;
161         } break;
162         case RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP: {
163             ALOGV("RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP");
164             CHECK_INTERFACE(ICameraClient, data, reply);
165             nsecs_t timestamp;
166             status_t res = data.readInt64(&timestamp);
167             if (res != OK) {
168                 ALOGE("%s: Failed to read timestamp: %s (%d)", __FUNCTION__, strerror(-res), res);
169                 return BAD_VALUE;
170             }
171             native_handle_t* handle = data.readNativeHandle();
172             if (handle == nullptr) {
173                 ALOGE("%s: Received a null native handle", __FUNCTION__);
174                 return BAD_VALUE;
175             }
176 
177             // The native handle will be freed in BpCamera::releaseRecordingFrameHandle.
178             recordingFrameHandleCallbackTimestamp(timestamp, handle);
179             return NO_ERROR;
180         } break;
181         case RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP_BATCH: {
182             ALOGV("RECORDING_FRAME_HANDLE_CALLBACK_TIMESTAMP_BATCH");
183             CHECK_INTERFACE(ICameraClient, data, reply);
184             uint32_t n = 0;
185             status_t res = data.readUint32(&n);
186             if (res != OK) {
187                 ALOGE("%s: Failed to read batch size: %s (%d)", __FUNCTION__, strerror(-res), res);
188                 return BAD_VALUE;
189             }
190             std::vector<nsecs_t> timestamps;
191             std::vector<native_handle_t*> handles;
192             timestamps.reserve(n);
193             handles.reserve(n);
194             for (uint32_t i = 0; i < n; i++) {
195                 nsecs_t t;
196                 res = data.readInt64(&t);
197                 if (res != OK) {
198                     ALOGE("%s: Failed to read timestamp[%d]: %s (%d)",
199                             __FUNCTION__, i, strerror(-res), res);
200                     return BAD_VALUE;
201                 }
202                 timestamps.push_back(t);
203             }
204             for (uint32_t i = 0; i < n; i++) {
205                 native_handle_t* handle = data.readNativeHandle();
206                 if (handle == nullptr) {
207                     ALOGE("%s: Received a null native handle at handles[%d]",
208                             __FUNCTION__, i);
209                     return BAD_VALUE;
210                 }
211                 handles.push_back(handle);
212             }
213 
214             // The native handle will be freed in BpCamera::releaseRecordingFrameHandleBatch.
215             recordingFrameHandleCallbackTimestampBatch(timestamps, handles);
216             return NO_ERROR;
217         } break;
218         default:
219             return BBinder::onTransact(code, data, reply, flags);
220     }
221 }
222 
223 // ----------------------------------------------------------------------------
224 
225 } // namespace hardware
226 } // namespace android
227