CameraSource.cpp revision 5c9523154d106b555db6c41f85ab205a4f189b02 
1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17//#define LOG_NDEBUG 0
18#define LOG_TAG "CameraSource"
19#include <utils/Log.h>
20
21#include <OMX_Component.h>
22#include <binder/IPCThreadState.h>
23#include <media/stagefright/CameraSource.h>
24#include <media/stagefright/MediaDebug.h>
25#include <media/stagefright/MediaDefs.h>
26#include <media/stagefright/MediaErrors.h>
27#include <media/stagefright/MetaData.h>
28#include <camera/Camera.h>
29#include <camera/CameraParameters.h>
30#include <surfaceflinger/Surface.h>
31#include <utils/String8.h>
32#include <cutils/properties.h>
33
34namespace android {
35
36struct CameraSourceListener : public CameraListener {
37    CameraSourceListener(const sp<CameraSource> &source);
38
39    virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2);
40    virtual void postData(int32_t msgType, const sp<IMemory> &dataPtr);
41
42    virtual void postDataTimestamp(
43            nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
44
45protected:
46    virtual ~CameraSourceListener();
47
48private:
49    wp<CameraSource> mSource;
50
51    CameraSourceListener(const CameraSourceListener &);
52    CameraSourceListener &operator=(const CameraSourceListener &);
53};
54
55CameraSourceListener::CameraSourceListener(const sp<CameraSource> &source)
56    : mSource(source) {
57}
58
59CameraSourceListener::~CameraSourceListener() {
60}
61
62void CameraSourceListener::notify(int32_t msgType, int32_t ext1, int32_t ext2) {
63    LOGV("notify(%d, %d, %d)", msgType, ext1, ext2);
64}
65
66void CameraSourceListener::postData(int32_t msgType, const sp<IMemory> &dataPtr) {
67    LOGV("postData(%d, ptr:%p, size:%d)",
68         msgType, dataPtr->pointer(), dataPtr->size());
69
70    sp<CameraSource> source = mSource.promote();
71    if (source.get() != NULL) {
72        source->dataCallback(msgType, dataPtr);
73    }
74}
75
76void CameraSourceListener::postDataTimestamp(
77        nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) {
78
79    sp<CameraSource> source = mSource.promote();
80    if (source.get() != NULL) {
81        source->dataCallbackTimestamp(timestamp/1000, msgType, dataPtr);
82    }
83}
84
85static int32_t getColorFormat(const char* colorFormat) {
86    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV420P)) {
87       return OMX_COLOR_FormatYUV420Planar;
88    }
89
90    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV422SP)) {
91       return OMX_COLOR_FormatYUV422SemiPlanar;
92    }
93
94    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV420SP)) {
95        return OMX_COLOR_FormatYUV420SemiPlanar;
96    }
97
98    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV422I)) {
99        return OMX_COLOR_FormatYCbYCr;
100    }
101
102    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_RGB565)) {
103       return OMX_COLOR_Format16bitRGB565;
104    }
105
106    LOGE("Uknown color format (%s), please add it to "
107         "CameraSource::getColorFormat", colorFormat);
108
109    CHECK_EQ(0, "Unknown color format");
110}
111
112CameraSource *CameraSource::Create() {
113    Size size;
114    size.width = -1;
115    size.height = -1;
116
117    sp<ICamera> camera;
118    return new CameraSource(camera, 0, size, -1, NULL, false);
119}
120
121// static
122CameraSource *CameraSource::CreateFromCamera(
123    const sp<ICamera>& camera,
124    int32_t cameraId,
125    Size videoSize,
126    int32_t frameRate,
127    const sp<Surface>& surface,
128    bool storeMetaDataInVideoBuffers) {
129
130    CameraSource *source = new CameraSource(camera, cameraId,
131                    videoSize, frameRate, surface,
132                    storeMetaDataInVideoBuffers);
133
134    if (source != NULL) {
135        if (source->initCheck() != OK) {
136            delete source;
137            return NULL;
138        }
139    }
140    return source;
141}
142
143CameraSource::CameraSource(
144    const sp<ICamera>& camera,
145    int32_t cameraId,
146    Size videoSize,
147    int32_t frameRate,
148    const sp<Surface>& surface,
149    bool storeMetaDataInVideoBuffers)
150    : mCameraFlags(0),
151      mVideoFrameRate(-1),
152      mCamera(0),
153      mSurface(surface),
154      mNumFramesReceived(0),
155      mLastFrameTimestampUs(0),
156      mStarted(false),
157      mFirstFrameTimeUs(0),
158      mNumFramesEncoded(0),
159      mNumFramesDropped(0),
160      mNumGlitches(0),
161      mGlitchDurationThresholdUs(200000),
162      mCollectStats(false) {
163
164    mVideoSize.width  = -1;
165    mVideoSize.height = -1;
166
167    mInitCheck = init(camera, cameraId,
168                    videoSize, frameRate,
169                    storeMetaDataInVideoBuffers);
170}
171
172status_t CameraSource::initCheck() const {
173    return mInitCheck;
174}
175
176status_t CameraSource::isCameraAvailable(
177    const sp<ICamera>& camera, int32_t cameraId) {
178
179    if (camera == 0) {
180        mCamera = Camera::connect(cameraId);
181        mCameraFlags &= ~FLAGS_HOT_CAMERA;
182    } else {
183        mCamera = Camera::create(camera);
184        mCameraFlags |= FLAGS_HOT_CAMERA;
185    }
186
187    // Is camera available?
188    if (mCamera == 0) {
189        LOGE("Camera connection could not be established.");
190        return -EBUSY;
191    }
192    if (!(mCameraFlags & FLAGS_HOT_CAMERA)) {
193        mCamera->lock();
194    }
195    return OK;
196}
197
198
199/*
200 * Check to see whether the requested video width and height is one
201 * of the supported sizes.
202 * @param width the video frame width in pixels
203 * @param height the video frame height in pixels
204 * @param suppportedSizes the vector of sizes that we check against
205 * @return true if the dimension (width and height) is supported.
206 */
207static bool isVideoSizeSupported(
208    int32_t width, int32_t height,
209    const Vector<Size>& supportedSizes) {
210
211    LOGV("isVideoSizeSupported");
212    for (size_t i = 0; i < supportedSizes.size(); ++i) {
213        if (width  == supportedSizes[i].width &&
214            height == supportedSizes[i].height) {
215            return true;
216        }
217    }
218    return false;
219}
220
221/*
222 * If the preview and video output is separate, we only set the
223 * the video size, and applications should set the preview size
224 * to some proper value, and the recording framework will not
225 * change the preview size; otherwise, if the video and preview
226 * output is the same, we need to set the preview to be the same
227 * as the requested video size.
228 *
229 */
230/*
231 * Query the camera to retrieve the supported video frame sizes
232 * and also to see whether CameraParameters::setVideoSize()
233 * is supported or not.
234 * @param params CameraParameters to retrieve the information
235 * @@param isSetVideoSizeSupported retunrs whether method
236 *      CameraParameters::setVideoSize() is supported or not.
237 * @param sizes returns the vector of Size objects for the
238 *      supported video frame sizes advertised by the camera.
239 */
240static void getSupportedVideoSizes(
241    const CameraParameters& params,
242    bool *isSetVideoSizeSupported,
243    Vector<Size>& sizes) {
244
245    *isSetVideoSizeSupported = true;
246    params.getSupportedVideoSizes(sizes);
247    if (sizes.size() == 0) {
248        LOGD("Camera does not support setVideoSize()");
249        params.getSupportedPreviewSizes(sizes);
250        *isSetVideoSizeSupported = false;
251    }
252}
253
254/*
255 * Check whether the camera has the supported color format
256 * @param params CameraParameters to retrieve the information
257 * @return OK if no error.
258 */
259status_t CameraSource::isCameraColorFormatSupported(
260        const CameraParameters& params) {
261    mColorFormat = getColorFormat(params.get(
262            CameraParameters::KEY_VIDEO_FRAME_FORMAT));
263    if (mColorFormat == -1) {
264        return BAD_VALUE;
265    }
266    return OK;
267}
268
269/*
270 * Configure the camera to use the requested video size
271 * (width and height) and/or frame rate. If both width and
272 * height are -1, configuration on the video size is skipped.
273 * if frameRate is -1, configuration on the frame rate
274 * is skipped. Skipping the configuration allows one to
275 * use the current camera setting without the need to
276 * actually know the specific values (see Create() method).
277 *
278 * @param params the CameraParameters to be configured
279 * @param width the target video frame width in pixels
280 * @param height the target video frame height in pixels
281 * @param frameRate the target frame rate in frames per second.
282 * @return OK if no error.
283 */
284status_t CameraSource::configureCamera(
285        CameraParameters* params,
286        int32_t width, int32_t height,
287        int32_t frameRate) {
288
289    Vector<Size> sizes;
290    bool isSetVideoSizeSupportedByCamera = true;
291    getSupportedVideoSizes(*params, &isSetVideoSizeSupportedByCamera, sizes);
292    bool isCameraParamChanged = false;
293    if (width != -1 && height != -1) {
294        if (!isVideoSizeSupported(width, height, sizes)) {
295            LOGE("Video dimension (%dx%d) is unsupported", width, height);
296            return BAD_VALUE;
297        }
298        if (isSetVideoSizeSupportedByCamera) {
299            params->setVideoSize(width, height);
300        } else {
301            params->setPreviewSize(width, height);
302        }
303        isCameraParamChanged = true;
304    } else if ((width == -1 && height != -1) ||
305               (width != -1 && height == -1)) {
306        // If one and only one of the width and height is -1
307        // we reject such a request.
308        LOGE("Requested video size (%dx%d) is not supported", width, height);
309        return BAD_VALUE;
310    } else {  // width == -1 && height == -1
311        // Do not configure the camera.
312        // Use the current width and height value setting from the camera.
313    }
314
315    if (frameRate != -1) {
316        params->setPreviewFrameRate(frameRate);
317        isCameraParamChanged = true;
318    } else {  // frameRate == -1
319        // Do not configure the camera.
320        // Use the current frame rate value setting from the camera
321    }
322
323    if (isCameraParamChanged) {
324        // Either frame rate or frame size needs to be changed.
325        String8 s = params->flatten();
326        if (OK != mCamera->setParameters(s)) {
327            LOGE("Could not change settings."
328                 " Someone else is using camera %p?", mCamera.get());
329            return -EBUSY;
330        }
331    }
332    return OK;
333}
334
335/*
336 * Check whether the requested video frame size
337 * has been successfully configured or not. If both width and height
338 * are -1, check on the current width and height value setting
339 * is performed.
340 *
341 * @param params CameraParameters to retrieve the information
342 * @param the target video frame width in pixels to check against
343 * @param the target video frame height in pixels to check against
344 * @return OK if no error
345 */
346status_t CameraSource::checkVideoSize(
347        const CameraParameters& params,
348        int32_t width, int32_t height) {
349
350    int32_t frameWidthActual = -1;
351    int32_t frameHeightActual = -1;
352    params.getPreviewSize(&frameWidthActual, &frameHeightActual);
353    if (frameWidthActual < 0 || frameHeightActual < 0) {
354        LOGE("Failed to retrieve video frame size (%dx%d)",
355                frameWidthActual, frameHeightActual);
356        return UNKNOWN_ERROR;
357    }
358
359    // Check the actual video frame size against the target/requested
360    // video frame size.
361    if (width != -1 && height != -1) {
362        if (frameWidthActual != width || frameHeightActual != height) {
363            LOGE("Failed to set video frame size to %dx%d. "
364                    "The actual video size is %dx%d ", width, height,
365                    frameWidthActual, frameHeightActual);
366            return UNKNOWN_ERROR;
367        }
368    }
369
370    // Good now.
371    mVideoSize.width = frameWidthActual;
372    mVideoSize.height = frameHeightActual;
373    return OK;
374}
375
376/*
377 * Check the requested frame rate has been successfully configured or not.
378 * If the target frameRate is -1, check on the current frame rate value
379 * setting is performed.
380 *
381 * @param params CameraParameters to retrieve the information
382 * @param the target video frame rate to check against
383 * @return OK if no error.
384 */
385status_t CameraSource::checkFrameRate(
386        const CameraParameters& params,
387        int32_t frameRate) {
388
389    int32_t frameRateActual = params.getPreviewFrameRate();
390    if (frameRateActual < 0) {
391        LOGE("Failed to retrieve preview frame rate (%d)", frameRateActual);
392        return UNKNOWN_ERROR;
393    }
394
395    // Check the actual video frame rate against the target/requested
396    // video frame rate.
397    if (frameRate != -1 && (frameRateActual - frameRate) != 0) {
398        LOGE("Failed to set preview frame rate to %d fps. The actual "
399                "frame rate is %d", frameRate, frameRateActual);
400        return UNKNOWN_ERROR;
401    }
402
403    // Good now.
404    mVideoFrameRate = frameRateActual;
405    return OK;
406}
407
408/*
409 * Initialize the CameraSource to so that it becomes
410 * ready for providing the video input streams as requested.
411 * @param camera the camera object used for the video source
412 * @param cameraId if camera == 0, use camera with this id
413 *      as the video source
414 * @param videoSize the target video frame size. If both
415 *      width and height in videoSize is -1, use the current
416 *      width and heigth settings by the camera
417 * @param frameRate the target frame rate in frames per second.
418 *      if it is -1, use the current camera frame rate setting.
419 * @param storeMetaDataInVideoBuffers request to store meta
420 *      data or real YUV data in video buffers. Request to
421 *      store meta data in video buffers may not be honored
422 *      if the source does not support this feature.
423 *
424 * @return OK if no error.
425 */
426status_t CameraSource::init(
427        const sp<ICamera>& camera,
428        int32_t cameraId,
429        Size videoSize,
430        int32_t frameRate,
431        bool storeMetaDataInVideoBuffers) {
432
433    status_t err = OK;
434    int64_t token = IPCThreadState::self()->clearCallingIdentity();
435
436    if ((err  = isCameraAvailable(camera, cameraId)) != OK) {
437        return err;
438    }
439    CameraParameters params(mCamera->getParameters());
440    if ((err = isCameraColorFormatSupported(params)) != OK) {
441        return err;
442    }
443
444    // Set the camera to use the requested video frame size
445    // and/or frame rate.
446    if ((err = configureCamera(&params,
447                    videoSize.width, videoSize.height,
448                    frameRate))) {
449        return err;
450    }
451
452    // Check on video frame size and frame rate.
453    CameraParameters newCameraParams(mCamera->getParameters());
454    if ((err = checkVideoSize(newCameraParams,
455                videoSize.width, videoSize.height)) != OK) {
456        return err;
457    }
458    if ((err = checkFrameRate(newCameraParams, frameRate)) != OK) {
459        return err;
460    }
461
462    // This CHECK is good, since we just passed the lock/unlock
463    // check earlier by calling mCamera->setParameters().
464    CHECK_EQ(OK, mCamera->setPreviewDisplay(mSurface));
465
466    mIsMetaDataStoredInVideoBuffers = false;
467    if (storeMetaDataInVideoBuffers &&
468        OK == mCamera->storeMetaDataInBuffers(true)) {
469        mIsMetaDataStoredInVideoBuffers = true;
470    }
471
472    /*
473     * mCamera->startRecording() signals camera hal to make
474     * available the video buffers (for instance, allocation
475     * of the video buffers may be triggered when camera hal's
476     * startRecording() method is called). Making available these
477     * video buffers earlier (before calling start()) is critical,
478     * if one wants to configure omx video encoders to use these
479     * buffers for passing video frame data during video recording
480     * without the need to memcpy the video frame data stored
481     * in these buffers. Eliminating memcpy for video frame data
482     * is crucial in performance for HD quality video recording
483     * applications.
484     *
485     * Based on OMX IL spec, configuring the omx video encoders
486     * must occur in loaded state. When start() is called, omx
487     * video encoders are already in idle state, which is too
488     * late. Thus, we must call mCamera->startRecording() earlier.
489     */
490    startCameraRecording();
491
492    IPCThreadState::self()->restoreCallingIdentity(token);
493
494    int64_t glitchDurationUs = (1000000LL / mVideoFrameRate);
495    if (glitchDurationUs > mGlitchDurationThresholdUs) {
496        mGlitchDurationThresholdUs = glitchDurationUs;
497    }
498
499    // XXX: query camera for the stride and slice height
500    // when the capability becomes available.
501    mMeta = new MetaData;
502    mMeta->setCString(kKeyMIMEType,  MEDIA_MIMETYPE_VIDEO_RAW);
503    mMeta->setInt32(kKeyColorFormat, mColorFormat);
504    mMeta->setInt32(kKeyWidth,       mVideoSize.width);
505    mMeta->setInt32(kKeyHeight,      mVideoSize.height);
506    mMeta->setInt32(kKeyStride,      mVideoSize.width);
507    mMeta->setInt32(kKeySliceHeight, mVideoSize.height);
508    return OK;
509}
510
511CameraSource::~CameraSource() {
512    if (mStarted) {
513        stop();
514    }
515}
516
517void CameraSource::startCameraRecording() {
518    CHECK_EQ(OK, mCamera->startRecording());
519    CHECK(mCamera->recordingEnabled());
520}
521
522status_t CameraSource::start(MetaData *meta) {
523    CHECK(!mStarted);
524    if (mInitCheck != OK) {
525        LOGE("CameraSource is not initialized yet");
526        return mInitCheck;
527    }
528
529    char value[PROPERTY_VALUE_MAX];
530    if (property_get("media.stagefright.record-stats", value, NULL)
531        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
532        mCollectStats = true;
533    }
534
535    mStartTimeUs = 0;
536    int64_t startTimeUs;
537    if (meta && meta->findInt64(kKeyTime, &startTimeUs)) {
538        mStartTimeUs = startTimeUs;
539    }
540
541    int64_t token = IPCThreadState::self()->clearCallingIdentity();
542    mCamera->setListener(new CameraSourceListener(this));
543    IPCThreadState::self()->restoreCallingIdentity(token);
544
545    mStarted = true;
546    return OK;
547}
548
549void CameraSource::stopCameraRecording() {
550    mCamera->setListener(NULL);
551    mCamera->stopRecording();
552}
553
554status_t CameraSource::stop() {
555    LOGV("stop");
556    Mutex::Autolock autoLock(mLock);
557    mStarted = false;
558    mFrameAvailableCondition.signal();
559
560    int64_t token = IPCThreadState::self()->clearCallingIdentity();
561    stopCameraRecording();
562    releaseQueuedFrames();
563    while (!mFramesBeingEncoded.empty()) {
564        LOGI("Waiting for outstanding frames being encoded: %d",
565                mFramesBeingEncoded.size());
566        mFrameCompleteCondition.wait(mLock);
567    }
568
569    LOGV("Disconnect camera");
570    if ((mCameraFlags & FLAGS_HOT_CAMERA) == 0) {
571        LOGV("Camera was cold when we started, stopping preview");
572        mCamera->stopPreview();
573    }
574    mCamera->unlock();
575    mCamera.clear();
576    mCamera = 0;
577    mCameraFlags = 0;
578    IPCThreadState::self()->restoreCallingIdentity(token);
579
580    if (mCollectStats) {
581        LOGI("Frames received/encoded/dropped: %d/%d/%d in %lld us",
582                mNumFramesReceived, mNumFramesEncoded, mNumFramesDropped,
583                mLastFrameTimestampUs - mFirstFrameTimeUs);
584    }
585
586    CHECK_EQ(mNumFramesReceived, mNumFramesEncoded + mNumFramesDropped);
587    return OK;
588}
589
590void CameraSource::releaseRecordingFrame(const sp<IMemory>& frame) {
591    mCamera->releaseRecordingFrame(frame);
592}
593
594void CameraSource::releaseQueuedFrames() {
595    List<sp<IMemory> >::iterator it;
596    while (!mFramesReceived.empty()) {
597        it = mFramesReceived.begin();
598        releaseRecordingFrame(*it);
599        mFramesReceived.erase(it);
600        ++mNumFramesDropped;
601    }
602}
603
604sp<MetaData> CameraSource::getFormat() {
605    return mMeta;
606}
607
608void CameraSource::releaseOneRecordingFrame(const sp<IMemory>& frame) {
609    int64_t token = IPCThreadState::self()->clearCallingIdentity();
610    releaseRecordingFrame(frame);
611    IPCThreadState::self()->restoreCallingIdentity(token);
612}
613
614void CameraSource::signalBufferReturned(MediaBuffer *buffer) {
615    LOGV("signalBufferReturned: %p", buffer->data());
616    Mutex::Autolock autoLock(mLock);
617    for (List<sp<IMemory> >::iterator it = mFramesBeingEncoded.begin();
618         it != mFramesBeingEncoded.end(); ++it) {
619        if ((*it)->pointer() ==  buffer->data()) {
620            releaseOneRecordingFrame((*it));
621            mFramesBeingEncoded.erase(it);
622            ++mNumFramesEncoded;
623            buffer->setObserver(0);
624            buffer->release();
625            mFrameCompleteCondition.signal();
626            return;
627        }
628    }
629    CHECK_EQ(0, "signalBufferReturned: bogus buffer");
630}
631
632status_t CameraSource::read(
633        MediaBuffer **buffer, const ReadOptions *options) {
634    LOGV("read");
635
636    *buffer = NULL;
637
638    int64_t seekTimeUs;
639    ReadOptions::SeekMode mode;
640    if (options && options->getSeekTo(&seekTimeUs, &mode)) {
641        return ERROR_UNSUPPORTED;
642    }
643
644    sp<IMemory> frame;
645    int64_t frameTime;
646
647    {
648        Mutex::Autolock autoLock(mLock);
649        while (mStarted) {
650            while(mFramesReceived.empty()) {
651                mFrameAvailableCondition.wait(mLock);
652            }
653
654            if (!mStarted) {
655                return OK;
656            }
657
658            frame = *mFramesReceived.begin();
659            mFramesReceived.erase(mFramesReceived.begin());
660
661            frameTime = *mFrameTimes.begin();
662            mFrameTimes.erase(mFrameTimes.begin());
663            int64_t skipTimeUs;
664            if (!options || !options->getSkipFrame(&skipTimeUs)) {
665                skipTimeUs = frameTime;
666            }
667            if (skipTimeUs > frameTime) {
668                LOGV("skipTimeUs: %lld us > frameTime: %lld us",
669                    skipTimeUs, frameTime);
670                releaseOneRecordingFrame(frame);
671                ++mNumFramesDropped;
672                // Safeguard against the abuse of the kSkipFrame_Option.
673                if (skipTimeUs - frameTime >= 1E6) {
674                    LOGE("Frame skipping requested is way too long: %lld us",
675                        skipTimeUs - frameTime);
676                    return UNKNOWN_ERROR;
677                }
678            } else {
679                mFramesBeingEncoded.push_back(frame);
680                *buffer = new MediaBuffer(frame->pointer(), frame->size());
681                (*buffer)->setObserver(this);
682                (*buffer)->add_ref();
683                (*buffer)->meta_data()->setInt64(kKeyTime, frameTime);
684
685                return OK;
686            }
687        }
688    }
689    return OK;
690}
691
692void CameraSource::dataCallbackTimestamp(int64_t timestampUs,
693        int32_t msgType, const sp<IMemory> &data) {
694    LOGV("dataCallbackTimestamp: timestamp %lld us", timestampUs);
695    Mutex::Autolock autoLock(mLock);
696    if (!mStarted) {
697        releaseOneRecordingFrame(data);
698        ++mNumFramesReceived;
699        ++mNumFramesDropped;
700        return;
701    }
702
703    if (mNumFramesReceived > 0 &&
704        timestampUs - mLastFrameTimestampUs > mGlitchDurationThresholdUs) {
705        if (mNumGlitches % 10 == 0) {  // Don't spam the log
706            LOGW("Long delay detected in video recording");
707        }
708        ++mNumGlitches;
709    }
710
711    // May need to skip frame or modify timestamp. Currently implemented
712    // by the subclass CameraSourceTimeLapse.
713    if(skipCurrentFrame(timestampUs)) {
714        releaseOneRecordingFrame(data);
715        return;
716    }
717
718    mLastFrameTimestampUs = timestampUs;
719    if (mNumFramesReceived == 0) {
720        mFirstFrameTimeUs = timestampUs;
721        // Initial delay
722        if (mStartTimeUs > 0) {
723            if (timestampUs < mStartTimeUs) {
724                // Frame was captured before recording was started
725                // Drop it without updating the statistical data.
726                releaseOneRecordingFrame(data);
727                return;
728            }
729            mStartTimeUs = timestampUs - mStartTimeUs;
730        }
731    }
732    ++mNumFramesReceived;
733
734    mFramesReceived.push_back(data);
735    int64_t timeUs = mStartTimeUs + (timestampUs - mFirstFrameTimeUs);
736    mFrameTimes.push_back(timeUs);
737    LOGV("initial delay: %lld, current time stamp: %lld",
738        mStartTimeUs, timeUs);
739    mFrameAvailableCondition.signal();
740}
741
742size_t CameraSource::getNumberOfVideoBuffers() const {
743    LOGV("getNumberOfVideoBuffers");
744    size_t nBuffers = 0;
745    int64_t token = IPCThreadState::self()->clearCallingIdentity();
746    if (mInitCheck == OK && mCamera != 0) {
747        nBuffers = mCamera->getNumberOfVideoBuffers();
748    }
749    IPCThreadState::self()->restoreCallingIdentity(token);
750    return nBuffers;
751}
752
753sp<IMemory> CameraSource::getVideoBuffer(size_t index) const {
754    LOGV("getVideoBuffer: %d", index);
755    sp<IMemory> buffer = 0;
756    int64_t token = IPCThreadState::self()->clearCallingIdentity();
757    if (mInitCheck == OK && mCamera != 0) {
758        buffer = mCamera->getVideoBuffer(index);
759    }
760    IPCThreadState::self()->restoreCallingIdentity(token);
761    return buffer;
762}
763
764bool CameraSource::isMetaDataStoredInVideoBuffers() const {
765    LOGV("isMetaDataStoredInVideoBuffers");
766    return mIsMetaDataStoredInVideoBuffers;
767}
768
769}  // namespace android
770