ProCamera.cpp revision 65d7986ceac6e35426749ac7e05bbd2a38949db4 
1/*
2**
3** Copyright (C) 2013, 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 "ProCamera"
20#include <utils/Log.h>
21#include <utils/threads.h>
22#include <utils/Mutex.h>
23
24#include <binder/IPCThreadState.h>
25#include <binder/IServiceManager.h>
26#include <binder/IMemory.h>
27
28#include <camera/ProCamera.h>
29#include <camera/ICameraService.h>
30#include <camera/IProCameraUser.h>
31#include <camera/IProCameraCallbacks.h>
32
33#include <gui/IGraphicBufferProducer.h>
34
35#include <system/camera_metadata.h>
36
37namespace android {
38
39sp<ProCamera> ProCamera::connect(int cameraId)
40{
41    return CameraBaseT::connect(cameraId, String16(),
42                                 ICameraService::USE_CALLING_UID);
43}
44
45ProCamera::ProCamera(int cameraId)
46    : CameraBase(cameraId)
47{
48}
49
50ProCamera::~ProCamera()
51{
52
53}
54
55/* IProCameraUser's implementation */
56
57// callback from camera service
58void ProCamera::notifyCallback(int32_t msgType, int32_t ext1, int32_t ext2)
59{
60    return CameraBaseT::notifyCallback(msgType, ext1, ext2);
61}
62
63void ProCamera::onLockStatusChanged(
64                                 IProCameraCallbacks::LockStatus newLockStatus)
65{
66    ALOGV("%s: newLockStatus = %d", __FUNCTION__, newLockStatus);
67
68    sp<ProCameraListener> listener;
69    {
70        Mutex::Autolock _l(mLock);
71        listener = mListener;
72    }
73    if (listener != NULL) {
74        switch (newLockStatus) {
75            case IProCameraCallbacks::LOCK_ACQUIRED:
76                listener->onLockAcquired();
77                break;
78            case IProCameraCallbacks::LOCK_RELEASED:
79                listener->onLockReleased();
80                break;
81            case IProCameraCallbacks::LOCK_STOLEN:
82                listener->onLockStolen();
83                break;
84            default:
85                ALOGE("%s: Unknown lock status: %d",
86                      __FUNCTION__, newLockStatus);
87        }
88    }
89}
90
91void ProCamera::onResultReceived(int32_t frameId, camera_metadata* result) {
92    ALOGV("%s: frameId = %d, result = %p", __FUNCTION__, frameId, result);
93
94    sp<ProCameraListener> listener;
95    {
96        Mutex::Autolock _l(mLock);
97        listener = mListener;
98    }
99
100    CameraMetadata tmp(result);
101
102    // Unblock waitForFrame(id) callers
103    {
104        Mutex::Autolock al(mWaitMutex);
105        mMetadataReady = true;
106        mLatestMetadata = tmp; // make copy
107        mWaitCondition.broadcast();
108    }
109
110    result = tmp.release();
111
112    if (listener != NULL) {
113        listener->onResultReceived(frameId, result);
114    } else {
115        free_camera_metadata(result);
116    }
117
118}
119
120status_t ProCamera::exclusiveTryLock()
121{
122    sp <IProCameraUser> c = mCamera;
123    if (c == 0) return NO_INIT;
124
125    return c->exclusiveTryLock();
126}
127status_t ProCamera::exclusiveLock()
128{
129    sp <IProCameraUser> c = mCamera;
130    if (c == 0) return NO_INIT;
131
132    return c->exclusiveLock();
133}
134status_t ProCamera::exclusiveUnlock()
135{
136    sp <IProCameraUser> c = mCamera;
137    if (c == 0) return NO_INIT;
138
139    return c->exclusiveUnlock();
140}
141bool ProCamera::hasExclusiveLock()
142{
143    sp <IProCameraUser> c = mCamera;
144    if (c == 0) return NO_INIT;
145
146    return c->hasExclusiveLock();
147}
148
149// Note that the callee gets a copy of the metadata.
150int ProCamera::submitRequest(const struct camera_metadata* metadata,
151                             bool streaming)
152{
153    sp <IProCameraUser> c = mCamera;
154    if (c == 0) return NO_INIT;
155
156    return c->submitRequest(const_cast<struct camera_metadata*>(metadata),
157                            streaming);
158}
159
160status_t ProCamera::cancelRequest(int requestId)
161{
162    sp <IProCameraUser> c = mCamera;
163    if (c == 0) return NO_INIT;
164
165    return c->cancelRequest(requestId);
166}
167
168status_t ProCamera::deleteStream(int streamId)
169{
170    sp <IProCameraUser> c = mCamera;
171    if (c == 0) return NO_INIT;
172
173    status_t s = c->deleteStream(streamId);
174
175    mStreams.removeItem(streamId);
176
177    return s;
178}
179
180status_t ProCamera::createStream(int width, int height, int format,
181                                 const sp<Surface>& surface,
182                                 /*out*/
183                                 int* streamId)
184{
185    *streamId = -1;
186
187    ALOGV("%s: createStreamW %dx%d (fmt=0x%x)", __FUNCTION__, width, height,
188                                                                       format);
189
190    if (surface == 0) {
191        return BAD_VALUE;
192    }
193
194    return createStream(width, height, format,
195                        surface->getIGraphicBufferProducer(),
196                        streamId);
197}
198
199status_t ProCamera::createStream(int width, int height, int format,
200                                 const sp<IGraphicBufferProducer>& bufferProducer,
201                                 /*out*/
202                                 int* streamId) {
203    *streamId = -1;
204
205    ALOGV("%s: createStreamT %dx%d (fmt=0x%x)", __FUNCTION__, width, height,
206                                                                       format);
207
208    if (bufferProducer == 0) {
209        return BAD_VALUE;
210    }
211
212    sp <IProCameraUser> c = mCamera;
213    status_t stat = c->createStream(width, height, format, bufferProducer,
214                                    streamId);
215
216    if (stat == OK) {
217        StreamInfo s(*streamId);
218
219        mStreams.add(*streamId, s);
220    }
221
222    return stat;
223}
224
225status_t ProCamera::createStreamCpu(int width, int height, int format,
226                                    int heapCount,
227                                    /*out*/
228                                    sp<CpuConsumer>* cpuConsumer,
229                                    int* streamId) {
230    return createStreamCpu(width, height, format, heapCount,
231                           /*synchronousMode*/true,
232                           cpuConsumer, streamId);
233}
234
235status_t ProCamera::createStreamCpu(int width, int height, int format,
236                                    int heapCount,
237                                    bool synchronousMode,
238                                    /*out*/
239                                    sp<CpuConsumer>* cpuConsumer,
240                                    int* streamId)
241{
242    ALOGV("%s: createStreamW %dx%d (fmt=0x%x)", __FUNCTION__, width, height,
243                                                                        format);
244
245    *cpuConsumer = NULL;
246
247    sp <IProCameraUser> c = mCamera;
248    if (c == 0) return NO_INIT;
249
250    sp<CpuConsumer> cc = new CpuConsumer(heapCount, synchronousMode);
251    cc->setName(String8("ProCamera::mCpuConsumer"));
252
253    sp<Surface> stc = new Surface(
254        cc->getProducerInterface());
255
256    status_t s = createStream(width, height, format,
257                              stc->getIGraphicBufferProducer(),
258                              streamId);
259
260    if (s != OK) {
261        ALOGE("%s: Failure to create stream %dx%d (fmt=0x%x)", __FUNCTION__,
262                    width, height, format);
263        return s;
264    }
265
266    sp<ProFrameListener> frameAvailableListener =
267        new ProFrameListener(this, *streamId);
268
269    getStreamInfo(*streamId).cpuStream = true;
270    getStreamInfo(*streamId).cpuConsumer = cc;
271    getStreamInfo(*streamId).synchronousMode = synchronousMode;
272    getStreamInfo(*streamId).stc = stc;
273    // for lifetime management
274    getStreamInfo(*streamId).frameAvailableListener = frameAvailableListener;
275
276    cc->setFrameAvailableListener(frameAvailableListener);
277
278    *cpuConsumer = cc;
279
280    return s;
281}
282
283camera_metadata* ProCamera::getCameraInfo(int cameraId) {
284    ALOGV("%s: cameraId = %d", __FUNCTION__, cameraId);
285
286    sp <IProCameraUser> c = mCamera;
287    if (c == 0) return NULL;
288
289    camera_metadata* ptr = NULL;
290    status_t status = c->getCameraInfo(cameraId, &ptr);
291
292    if (status != OK) {
293        ALOGE("%s: Failed to get camera info, error = %d", __FUNCTION__, status);
294    }
295
296    return ptr;
297}
298
299status_t ProCamera::createDefaultRequest(int templateId,
300                                             camera_metadata** request) const {
301    ALOGV("%s: templateId = %d", __FUNCTION__, templateId);
302
303    sp <IProCameraUser> c = mCamera;
304    if (c == 0) return NO_INIT;
305
306    return c->createDefaultRequest(templateId, request);
307}
308
309void ProCamera::onFrameAvailable(int streamId) {
310    ALOGV("%s: streamId = %d", __FUNCTION__, streamId);
311
312    sp<ProCameraListener> listener = mListener;
313    StreamInfo& stream = getStreamInfo(streamId);
314
315    if (listener.get() != NULL) {
316        listener->onFrameAvailable(streamId, stream.cpuConsumer);
317    }
318
319    // Unblock waitForFrame(id) callers
320    {
321        Mutex::Autolock al(mWaitMutex);
322        getStreamInfo(streamId).frameReady++;
323        mWaitCondition.broadcast();
324    }
325}
326
327int ProCamera::waitForFrameBuffer(int streamId) {
328    status_t stat = BAD_VALUE;
329    Mutex::Autolock al(mWaitMutex);
330
331    StreamInfo& si = getStreamInfo(streamId);
332
333    if (si.frameReady > 0) {
334        int numFrames = si.frameReady;
335        si.frameReady = 0;
336        return numFrames;
337    } else {
338        while (true) {
339            stat = mWaitCondition.waitRelative(mWaitMutex,
340                                                mWaitTimeout);
341            if (stat != OK) {
342                ALOGE("%s: Error while waiting for frame buffer: %d",
343                    __FUNCTION__, stat);
344                return stat;
345            }
346
347            if (si.frameReady > 0) {
348                int numFrames = si.frameReady;
349                si.frameReady = 0;
350                return numFrames;
351            }
352            // else it was some other stream that got unblocked
353        }
354    }
355
356    return stat;
357}
358
359int ProCamera::dropFrameBuffer(int streamId, int count) {
360    StreamInfo& si = getStreamInfo(streamId);
361
362    if (!si.cpuStream) {
363        return BAD_VALUE;
364    } else if (count < 0) {
365        return BAD_VALUE;
366    }
367
368    if (!si.synchronousMode) {
369        ALOGW("%s: No need to drop frames on asynchronous streams,"
370              " as asynchronous mode only keeps 1 latest frame around.",
371              __FUNCTION__);
372        return BAD_VALUE;
373    }
374
375    int numDropped = 0;
376    for (int i = 0; i < count; ++i) {
377        CpuConsumer::LockedBuffer buffer;
378        if (si.cpuConsumer->lockNextBuffer(&buffer) != OK) {
379            break;
380        }
381
382        si.cpuConsumer->unlockBuffer(buffer);
383        numDropped++;
384    }
385
386    return numDropped;
387}
388
389status_t ProCamera::waitForFrameMetadata() {
390    status_t stat = BAD_VALUE;
391    Mutex::Autolock al(mWaitMutex);
392
393    if (mMetadataReady) {
394        return OK;
395    } else {
396        while (true) {
397            stat = mWaitCondition.waitRelative(mWaitMutex,
398                                               mWaitTimeout);
399
400            if (stat != OK) {
401                ALOGE("%s: Error while waiting for metadata: %d",
402                        __FUNCTION__, stat);
403                return stat;
404            }
405
406            if (mMetadataReady) {
407                mMetadataReady = false;
408                return OK;
409            }
410            // else it was some other stream or metadata
411        }
412    }
413
414    return stat;
415}
416
417CameraMetadata ProCamera::consumeFrameMetadata() {
418    Mutex::Autolock al(mWaitMutex);
419
420    // Destructive: Subsequent calls return empty metadatas
421    CameraMetadata tmp = mLatestMetadata;
422    mLatestMetadata.clear();
423
424    return tmp;
425}
426
427ProCamera::StreamInfo& ProCamera::getStreamInfo(int streamId) {
428    return mStreams.editValueFor(streamId);
429}
430
431}; // namespace android
432