Camera.cpp revision 33da402287605e40e189289b11a08b8f5d515818 
1/*
2**
3** Copyright (C) 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 "Camera"
20#include <utils/Log.h>
21#include <utils/threads.h>
22#include <utils/String16.h>
23#include <binder/IPCThreadState.h>
24#include <binder/IServiceManager.h>
25#include <binder/IMemory.h>
26
27#include <camera/Camera.h>
28#include <camera/ICameraRecordingProxyListener.h>
29#include <camera/ICameraService.h>
30#include <camera/ICamera.h>
31
32#include <gui/IGraphicBufferProducer.h>
33#include <gui/Surface.h>
34
35namespace android {
36
37Camera::Camera(int cameraId)
38    : CameraBase(cameraId)
39{
40}
41
42// construct a camera client from an existing camera remote
43sp<Camera> Camera::create(const sp<ICamera>& camera)
44{
45     ALOGV("create");
46     if (camera == 0) {
47         ALOGE("camera remote is a NULL pointer");
48         return 0;
49     }
50
51    sp<Camera> c = new Camera(-1);
52    if (camera->connect(c) == NO_ERROR) {
53        c->mStatus = NO_ERROR;
54        c->mCamera = camera;
55        camera->asBinder()->linkToDeath(c);
56        return c;
57    }
58    return 0;
59}
60
61Camera::~Camera()
62{
63    // We don't need to call disconnect() here because if the CameraService
64    // thinks we are the owner of the hardware, it will hold a (strong)
65    // reference to us, and we can't possibly be here. We also don't want to
66    // call disconnect() here if we are in the same process as mediaserver,
67    // because we may be invoked by CameraService::Client::connect() and will
68    // deadlock if we call any method of ICamera here.
69}
70
71sp<Camera> Camera::connect(int cameraId, const String16& clientPackageName,
72        int clientUid)
73{
74    return CameraBaseT::connect(cameraId, clientPackageName, clientUid);
75}
76
77status_t Camera::reconnect()
78{
79    ALOGV("reconnect");
80    sp <ICamera> c = mCamera;
81    if (c == 0) return NO_INIT;
82    return c->connect(this);
83}
84
85status_t Camera::lock()
86{
87    sp <ICamera> c = mCamera;
88    if (c == 0) return NO_INIT;
89    return c->lock();
90}
91
92status_t Camera::unlock()
93{
94    sp <ICamera> c = mCamera;
95    if (c == 0) return NO_INIT;
96    return c->unlock();
97}
98
99// pass the buffered IGraphicBufferProducer to the camera service
100status_t Camera::setPreviewTexture(const sp<IGraphicBufferProducer>& bufferProducer)
101{
102    ALOGV("setPreviewTexture(%p)", bufferProducer.get());
103    sp <ICamera> c = mCamera;
104    if (c == 0) return NO_INIT;
105    ALOGD_IF(bufferProducer == 0, "app passed NULL surface");
106    return c->setPreviewTexture(bufferProducer);
107}
108
109// start preview mode
110status_t Camera::startPreview()
111{
112    ALOGV("startPreview");
113    sp <ICamera> c = mCamera;
114    if (c == 0) return NO_INIT;
115    return c->startPreview();
116}
117
118status_t Camera::storeMetaDataInBuffers(bool enabled)
119{
120    ALOGV("storeMetaDataInBuffers: %s",
121            enabled? "true": "false");
122    sp <ICamera> c = mCamera;
123    if (c == 0) return NO_INIT;
124    return c->storeMetaDataInBuffers(enabled);
125}
126
127// start recording mode, must call setPreviewDisplay first
128status_t Camera::startRecording()
129{
130    ALOGV("startRecording");
131    sp <ICamera> c = mCamera;
132    if (c == 0) return NO_INIT;
133    return c->startRecording();
134}
135
136// stop preview mode
137void Camera::stopPreview()
138{
139    ALOGV("stopPreview");
140    sp <ICamera> c = mCamera;
141    if (c == 0) return;
142    c->stopPreview();
143}
144
145// stop recording mode
146void Camera::stopRecording()
147{
148    ALOGV("stopRecording");
149    {
150        Mutex::Autolock _l(mLock);
151        mRecordingProxyListener.clear();
152    }
153    sp <ICamera> c = mCamera;
154    if (c == 0) return;
155    c->stopRecording();
156}
157
158// release a recording frame
159void Camera::releaseRecordingFrame(const sp<IMemory>& mem)
160{
161    ALOGV("releaseRecordingFrame");
162    sp <ICamera> c = mCamera;
163    if (c == 0) return;
164    c->releaseRecordingFrame(mem);
165}
166
167// get preview state
168bool Camera::previewEnabled()
169{
170    ALOGV("previewEnabled");
171    sp <ICamera> c = mCamera;
172    if (c == 0) return false;
173    return c->previewEnabled();
174}
175
176// get recording state
177bool Camera::recordingEnabled()
178{
179    ALOGV("recordingEnabled");
180    sp <ICamera> c = mCamera;
181    if (c == 0) return false;
182    return c->recordingEnabled();
183}
184
185status_t Camera::autoFocus()
186{
187    ALOGV("autoFocus");
188    sp <ICamera> c = mCamera;
189    if (c == 0) return NO_INIT;
190    return c->autoFocus();
191}
192
193status_t Camera::cancelAutoFocus()
194{
195    ALOGV("cancelAutoFocus");
196    sp <ICamera> c = mCamera;
197    if (c == 0) return NO_INIT;
198    return c->cancelAutoFocus();
199}
200
201// take a picture
202status_t Camera::takePicture(int msgType)
203{
204    ALOGV("takePicture: 0x%x", msgType);
205    sp <ICamera> c = mCamera;
206    if (c == 0) return NO_INIT;
207    return c->takePicture(msgType);
208}
209
210// set preview/capture parameters - key/value pairs
211status_t Camera::setParameters(const String8& params)
212{
213    ALOGV("setParameters");
214    sp <ICamera> c = mCamera;
215    if (c == 0) return NO_INIT;
216    return c->setParameters(params);
217}
218
219// get preview/capture parameters - key/value pairs
220String8 Camera::getParameters() const
221{
222    ALOGV("getParameters");
223    String8 params;
224    sp <ICamera> c = mCamera;
225    if (c != 0) params = mCamera->getParameters();
226    return params;
227}
228
229// send command to camera driver
230status_t Camera::sendCommand(int32_t cmd, int32_t arg1, int32_t arg2)
231{
232    ALOGV("sendCommand");
233    sp <ICamera> c = mCamera;
234    if (c == 0) return NO_INIT;
235    return c->sendCommand(cmd, arg1, arg2);
236}
237
238void Camera::setListener(const sp<CameraListener>& listener)
239{
240    Mutex::Autolock _l(mLock);
241    mListener = listener;
242}
243
244void Camera::setRecordingProxyListener(const sp<ICameraRecordingProxyListener>& listener)
245{
246    Mutex::Autolock _l(mLock);
247    mRecordingProxyListener = listener;
248}
249
250void Camera::setPreviewCallbackFlags(int flag)
251{
252    ALOGV("setPreviewCallbackFlags");
253    sp <ICamera> c = mCamera;
254    if (c == 0) return;
255    mCamera->setPreviewCallbackFlag(flag);
256}
257
258// callback from camera service
259void Camera::notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2)
260{
261    return CameraBaseT::notifyCallback(msgType, ext1, ext2);
262}
263
264// callback from camera service when frame or image is ready
265void Camera::dataCallback(int32_t msgType, const sp<IMemory>& dataPtr,
266                          camera_frame_metadata_t *metadata)
267{
268    sp<CameraListener> listener;
269    {
270        Mutex::Autolock _l(mLock);
271        listener = mListener;
272    }
273    if (listener != NULL) {
274        listener->postData(msgType, dataPtr, metadata);
275    }
276}
277
278// callback from camera service when timestamped frame is ready
279void Camera::dataCallbackTimestamp(nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr)
280{
281    // If recording proxy listener is registered, forward the frame and return.
282    // The other listener (mListener) is ignored because the receiver needs to
283    // call releaseRecordingFrame.
284    sp<ICameraRecordingProxyListener> proxylistener;
285    {
286        Mutex::Autolock _l(mLock);
287        proxylistener = mRecordingProxyListener;
288    }
289    if (proxylistener != NULL) {
290        proxylistener->dataCallbackTimestamp(timestamp, msgType, dataPtr);
291        return;
292    }
293
294    sp<CameraListener> listener;
295    {
296        Mutex::Autolock _l(mLock);
297        listener = mListener;
298    }
299
300    if (listener != NULL) {
301        listener->postDataTimestamp(timestamp, msgType, dataPtr);
302    } else {
303        ALOGW("No listener was set. Drop a recording frame.");
304        releaseRecordingFrame(dataPtr);
305    }
306}
307
308sp<ICameraRecordingProxy> Camera::getRecordingProxy() {
309    ALOGV("getProxy");
310    return new RecordingProxy(this);
311}
312
313status_t Camera::RecordingProxy::startRecording(const sp<ICameraRecordingProxyListener>& listener)
314{
315    ALOGV("RecordingProxy::startRecording");
316    mCamera->setRecordingProxyListener(listener);
317    mCamera->reconnect();
318    return mCamera->startRecording();
319}
320
321void Camera::RecordingProxy::stopRecording()
322{
323    ALOGV("RecordingProxy::stopRecording");
324    mCamera->stopRecording();
325}
326
327void Camera::RecordingProxy::releaseRecordingFrame(const sp<IMemory>& mem)
328{
329    ALOGV("RecordingProxy::releaseRecordingFrame");
330    mCamera->releaseRecordingFrame(mem);
331}
332
333Camera::RecordingProxy::RecordingProxy(const sp<Camera>& camera)
334{
335    mCamera = camera;
336}
337
338}; // namespace android
339