CameraSource.cpp revision 1374eddc4455b26d1dffdca10fc70534b3f08c1d 
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    if (!strcmp(colorFormat, "OMX_TI_COLOR_FormatYUV420PackedSemiPlanar")) {
107       return OMX_TI_COLOR_FormatYUV420PackedSemiPlanar;
108    }
109
110    LOGE("Uknown color format (%s), please add it to "
111         "CameraSource::getColorFormat", colorFormat);
112
113    CHECK_EQ(0, "Unknown color format");
114}
115
116CameraSource *CameraSource::Create() {
117    Size size;
118    size.width = -1;
119    size.height = -1;
120
121    sp<ICamera> camera;
122    return new CameraSource(camera, NULL, 0, size, -1, NULL, false);
123}
124
125// static
126CameraSource *CameraSource::CreateFromCamera(
127    const sp<ICamera>& camera,
128    const sp<ICameraRecordingProxy>& proxy,
129    int32_t cameraId,
130    Size videoSize,
131    int32_t frameRate,
132    const sp<Surface>& surface,
133    bool storeMetaDataInVideoBuffers) {
134
135    CameraSource *source = new CameraSource(camera, proxy, cameraId,
136                    videoSize, frameRate, surface,
137                    storeMetaDataInVideoBuffers);
138    return source;
139}
140
141CameraSource::CameraSource(
142    const sp<ICamera>& camera,
143    const sp<ICameraRecordingProxy>& proxy,
144    int32_t cameraId,
145    Size videoSize,
146    int32_t frameRate,
147    const sp<Surface>& surface,
148    bool storeMetaDataInVideoBuffers)
149    : mCameraFlags(0),
150      mVideoFrameRate(-1),
151      mCamera(0),
152      mSurface(surface),
153      mNumFramesReceived(0),
154      mLastFrameTimestampUs(0),
155      mStarted(false),
156      mNumFramesEncoded(0),
157      mFirstFrameTimeUs(0),
158      mNumFramesDropped(0),
159      mNumGlitches(0),
160      mGlitchDurationThresholdUs(200000),
161      mCollectStats(false) {
162    mVideoSize.width  = -1;
163    mVideoSize.height = -1;
164
165    mInitCheck = init(camera, proxy, cameraId,
166                    videoSize, frameRate,
167                    storeMetaDataInVideoBuffers);
168    if (mInitCheck != OK) releaseCamera();
169}
170
171status_t CameraSource::initCheck() const {
172    return mInitCheck;
173}
174
175status_t CameraSource::isCameraAvailable(
176    const sp<ICamera>& camera, const sp<ICameraRecordingProxy>& proxy,
177    int32_t cameraId) {
178
179    if (camera == 0) {
180        mCamera = Camera::connect(cameraId);
181        if (mCamera == 0) return -EBUSY;
182        // If proxy is not passed in by applications, still use the proxy of
183        // our own Camera to simplify the code.
184        mCameraRecordingProxy = mCamera->getRecordingProxy();
185        mCameraFlags &= ~FLAGS_HOT_CAMERA;
186    } else {
187        // We get the proxy from Camera, not ICamera. We need to get the proxy
188        // to the remote Camera owned by the application. Here mCamera is a
189        // local Camera object created by us. We cannot use the proxy from
190        // mCamera here.
191        mCamera = Camera::create(camera);
192        if (mCamera == 0) return -EBUSY;
193        mCameraRecordingProxy = proxy;
194        mCameraFlags |= FLAGS_HOT_CAMERA;
195    }
196
197    mCamera->lock();
198    mDeathNotifier = new DeathNotifier();
199    // isBinderAlive needs linkToDeath to work.
200    mCameraRecordingProxy->asBinder()->linkToDeath(mDeathNotifier);
201
202    return OK;
203}
204
205
206/*
207 * Check to see whether the requested video width and height is one
208 * of the supported sizes.
209 * @param width the video frame width in pixels
210 * @param height the video frame height in pixels
211 * @param suppportedSizes the vector of sizes that we check against
212 * @return true if the dimension (width and height) is supported.
213 */
214static bool isVideoSizeSupported(
215    int32_t width, int32_t height,
216    const Vector<Size>& supportedSizes) {
217
218    LOGV("isVideoSizeSupported");
219    for (size_t i = 0; i < supportedSizes.size(); ++i) {
220        if (width  == supportedSizes[i].width &&
221            height == supportedSizes[i].height) {
222            return true;
223        }
224    }
225    return false;
226}
227
228/*
229 * If the preview and video output is separate, we only set the
230 * the video size, and applications should set the preview size
231 * to some proper value, and the recording framework will not
232 * change the preview size; otherwise, if the video and preview
233 * output is the same, we need to set the preview to be the same
234 * as the requested video size.
235 *
236 */
237/*
238 * Query the camera to retrieve the supported video frame sizes
239 * and also to see whether CameraParameters::setVideoSize()
240 * is supported or not.
241 * @param params CameraParameters to retrieve the information
242 * @@param isSetVideoSizeSupported retunrs whether method
243 *      CameraParameters::setVideoSize() is supported or not.
244 * @param sizes returns the vector of Size objects for the
245 *      supported video frame sizes advertised by the camera.
246 */
247static void getSupportedVideoSizes(
248    const CameraParameters& params,
249    bool *isSetVideoSizeSupported,
250    Vector<Size>& sizes) {
251
252    *isSetVideoSizeSupported = true;
253    params.getSupportedVideoSizes(sizes);
254    if (sizes.size() == 0) {
255        LOGD("Camera does not support setVideoSize()");
256        params.getSupportedPreviewSizes(sizes);
257        *isSetVideoSizeSupported = false;
258    }
259}
260
261/*
262 * Check whether the camera has the supported color format
263 * @param params CameraParameters to retrieve the information
264 * @return OK if no error.
265 */
266status_t CameraSource::isCameraColorFormatSupported(
267        const CameraParameters& params) {
268    mColorFormat = getColorFormat(params.get(
269            CameraParameters::KEY_VIDEO_FRAME_FORMAT));
270    if (mColorFormat == -1) {
271        return BAD_VALUE;
272    }
273    return OK;
274}
275
276/*
277 * Configure the camera to use the requested video size
278 * (width and height) and/or frame rate. If both width and
279 * height are -1, configuration on the video size is skipped.
280 * if frameRate is -1, configuration on the frame rate
281 * is skipped. Skipping the configuration allows one to
282 * use the current camera setting without the need to
283 * actually know the specific values (see Create() method).
284 *
285 * @param params the CameraParameters to be configured
286 * @param width the target video frame width in pixels
287 * @param height the target video frame height in pixels
288 * @param frameRate the target frame rate in frames per second.
289 * @return OK if no error.
290 */
291status_t CameraSource::configureCamera(
292        CameraParameters* params,
293        int32_t width, int32_t height,
294        int32_t frameRate) {
295
296    Vector<Size> sizes;
297    bool isSetVideoSizeSupportedByCamera = true;
298    getSupportedVideoSizes(*params, &isSetVideoSizeSupportedByCamera, sizes);
299    bool isCameraParamChanged = false;
300    if (width != -1 && height != -1) {
301        if (!isVideoSizeSupported(width, height, sizes)) {
302            LOGE("Video dimension (%dx%d) is unsupported", width, height);
303            return BAD_VALUE;
304        }
305        if (isSetVideoSizeSupportedByCamera) {
306            params->setVideoSize(width, height);
307        } else {
308            params->setPreviewSize(width, height);
309        }
310        isCameraParamChanged = true;
311    } else if ((width == -1 && height != -1) ||
312               (width != -1 && height == -1)) {
313        // If one and only one of the width and height is -1
314        // we reject such a request.
315        LOGE("Requested video size (%dx%d) is not supported", width, height);
316        return BAD_VALUE;
317    } else {  // width == -1 && height == -1
318        // Do not configure the camera.
319        // Use the current width and height value setting from the camera.
320    }
321
322    if (frameRate != -1) {
323        CHECK(frameRate > 0 && frameRate <= 120);
324        const char* supportedFrameRates =
325                params->get(CameraParameters::KEY_SUPPORTED_PREVIEW_FRAME_RATES);
326        CHECK(supportedFrameRates != NULL);
327        LOGV("Supported frame rates: %s", supportedFrameRates);
328        char buf[4];
329        snprintf(buf, 4, "%d", frameRate);
330        if (strstr(supportedFrameRates, buf) == NULL) {
331            LOGE("Requested frame rate (%d) is not supported: %s",
332                frameRate, supportedFrameRates);
333            return BAD_VALUE;
334        }
335
336        // The frame rate is supported, set the camera to the requested value.
337        params->setPreviewFrameRate(frameRate);
338        isCameraParamChanged = true;
339    } else {  // frameRate == -1
340        // Do not configure the camera.
341        // Use the current frame rate value setting from the camera
342    }
343
344    if (isCameraParamChanged) {
345        // Either frame rate or frame size needs to be changed.
346        String8 s = params->flatten();
347        if (OK != mCamera->setParameters(s)) {
348            LOGE("Could not change settings."
349                 " Someone else is using camera %p?", mCamera.get());
350            return -EBUSY;
351        }
352    }
353    return OK;
354}
355
356/*
357 * Check whether the requested video frame size
358 * has been successfully configured or not. If both width and height
359 * are -1, check on the current width and height value setting
360 * is performed.
361 *
362 * @param params CameraParameters to retrieve the information
363 * @param the target video frame width in pixels to check against
364 * @param the target video frame height in pixels to check against
365 * @return OK if no error
366 */
367status_t CameraSource::checkVideoSize(
368        const CameraParameters& params,
369        int32_t width, int32_t height) {
370
371    // The actual video size is the same as the preview size
372    // if the camera hal does not support separate video and
373    // preview output. In this case, we retrieve the video
374    // size from preview.
375    int32_t frameWidthActual = -1;
376    int32_t frameHeightActual = -1;
377    Vector<Size> sizes;
378    params.getSupportedVideoSizes(sizes);
379    if (sizes.size() == 0) {
380        // video size is the same as preview size
381        params.getPreviewSize(&frameWidthActual, &frameHeightActual);
382    } else {
383        // video size may not be the same as preview
384        params.getVideoSize(&frameWidthActual, &frameHeightActual);
385    }
386    if (frameWidthActual < 0 || frameHeightActual < 0) {
387        LOGE("Failed to retrieve video frame size (%dx%d)",
388                frameWidthActual, frameHeightActual);
389        return UNKNOWN_ERROR;
390    }
391
392    // Check the actual video frame size against the target/requested
393    // video frame size.
394    if (width != -1 && height != -1) {
395        if (frameWidthActual != width || frameHeightActual != height) {
396            LOGE("Failed to set video frame size to %dx%d. "
397                    "The actual video size is %dx%d ", width, height,
398                    frameWidthActual, frameHeightActual);
399            return UNKNOWN_ERROR;
400        }
401    }
402
403    // Good now.
404    mVideoSize.width = frameWidthActual;
405    mVideoSize.height = frameHeightActual;
406    return OK;
407}
408
409/*
410 * Check the requested frame rate has been successfully configured or not.
411 * If the target frameRate is -1, check on the current frame rate value
412 * setting is performed.
413 *
414 * @param params CameraParameters to retrieve the information
415 * @param the target video frame rate to check against
416 * @return OK if no error.
417 */
418status_t CameraSource::checkFrameRate(
419        const CameraParameters& params,
420        int32_t frameRate) {
421
422    int32_t frameRateActual = params.getPreviewFrameRate();
423    if (frameRateActual < 0) {
424        LOGE("Failed to retrieve preview frame rate (%d)", frameRateActual);
425        return UNKNOWN_ERROR;
426    }
427
428    // Check the actual video frame rate against the target/requested
429    // video frame rate.
430    if (frameRate != -1 && (frameRateActual - frameRate) != 0) {
431        LOGE("Failed to set preview frame rate to %d fps. The actual "
432                "frame rate is %d", frameRate, frameRateActual);
433        return UNKNOWN_ERROR;
434    }
435
436    // Good now.
437    mVideoFrameRate = frameRateActual;
438    return OK;
439}
440
441/*
442 * Initialize the CameraSource to so that it becomes
443 * ready for providing the video input streams as requested.
444 * @param camera the camera object used for the video source
445 * @param cameraId if camera == 0, use camera with this id
446 *      as the video source
447 * @param videoSize the target video frame size. If both
448 *      width and height in videoSize is -1, use the current
449 *      width and heigth settings by the camera
450 * @param frameRate the target frame rate in frames per second.
451 *      if it is -1, use the current camera frame rate setting.
452 * @param storeMetaDataInVideoBuffers request to store meta
453 *      data or real YUV data in video buffers. Request to
454 *      store meta data in video buffers may not be honored
455 *      if the source does not support this feature.
456 *
457 * @return OK if no error.
458 */
459status_t CameraSource::init(
460        const sp<ICamera>& camera,
461        const sp<ICameraRecordingProxy>& proxy,
462        int32_t cameraId,
463        Size videoSize,
464        int32_t frameRate,
465        bool storeMetaDataInVideoBuffers) {
466
467    status_t err = OK;
468    int64_t token = IPCThreadState::self()->clearCallingIdentity();
469    err = initWithCameraAccess(camera, proxy, cameraId,
470                               videoSize, frameRate,
471                               storeMetaDataInVideoBuffers);
472    IPCThreadState::self()->restoreCallingIdentity(token);
473    return err;
474}
475
476status_t CameraSource::initWithCameraAccess(
477        const sp<ICamera>& camera,
478        const sp<ICameraRecordingProxy>& proxy,
479        int32_t cameraId,
480        Size videoSize,
481        int32_t frameRate,
482        bool storeMetaDataInVideoBuffers) {
483    status_t err = OK;
484
485    if ((err = isCameraAvailable(camera, proxy, cameraId)) != OK) {
486        LOGE("Camera connection could not be established.");
487        return err;
488    }
489    CameraParameters params(mCamera->getParameters());
490    if ((err = isCameraColorFormatSupported(params)) != OK) {
491        return err;
492    }
493
494    // Set the camera to use the requested video frame size
495    // and/or frame rate.
496    if ((err = configureCamera(&params,
497                    videoSize.width, videoSize.height,
498                    frameRate))) {
499        return err;
500    }
501
502    // Check on video frame size and frame rate.
503    CameraParameters newCameraParams(mCamera->getParameters());
504    if ((err = checkVideoSize(newCameraParams,
505                videoSize.width, videoSize.height)) != OK) {
506        return err;
507    }
508    if ((err = checkFrameRate(newCameraParams, frameRate)) != OK) {
509        return err;
510    }
511
512    // This CHECK is good, since we just passed the lock/unlock
513    // check earlier by calling mCamera->setParameters().
514    CHECK_EQ(OK, mCamera->setPreviewDisplay(mSurface));
515
516    // By default, do not store metadata in video buffers
517    mIsMetaDataStoredInVideoBuffers = false;
518    mCamera->storeMetaDataInBuffers(false);
519    if (storeMetaDataInVideoBuffers) {
520        if (OK == mCamera->storeMetaDataInBuffers(true)) {
521            mIsMetaDataStoredInVideoBuffers = true;
522        }
523    }
524
525    int64_t glitchDurationUs = (1000000LL / mVideoFrameRate);
526    if (glitchDurationUs > mGlitchDurationThresholdUs) {
527        mGlitchDurationThresholdUs = glitchDurationUs;
528    }
529
530    // XXX: query camera for the stride and slice height
531    // when the capability becomes available.
532    mMeta = new MetaData;
533    mMeta->setCString(kKeyMIMEType,  MEDIA_MIMETYPE_VIDEO_RAW);
534    mMeta->setInt32(kKeyColorFormat, mColorFormat);
535    mMeta->setInt32(kKeyWidth,       mVideoSize.width);
536    mMeta->setInt32(kKeyHeight,      mVideoSize.height);
537    mMeta->setInt32(kKeyStride,      mVideoSize.width);
538    mMeta->setInt32(kKeySliceHeight, mVideoSize.height);
539    mMeta->setInt32(kKeyFrameRate,   mVideoFrameRate);
540    return OK;
541}
542
543CameraSource::~CameraSource() {
544    if (mStarted) {
545        stop();
546    } else if (mInitCheck == OK) {
547        // Camera is initialized but because start() is never called,
548        // the lock on Camera is never released(). This makes sure
549        // Camera's lock is released in this case.
550        releaseCamera();
551    }
552}
553
554void CameraSource::startCameraRecording() {
555    // Reset the identity to the current thread because media server owns the
556    // camera and recording is started by the applications. The applications
557    // will connect to the camera in ICameraRecordingProxy::startRecording.
558    int64_t token = IPCThreadState::self()->clearCallingIdentity();
559    mCamera->unlock();
560    mCamera.clear();
561    IPCThreadState::self()->restoreCallingIdentity(token);
562    CHECK_EQ(OK, mCameraRecordingProxy->startRecording(new ProxyListener(this)));
563}
564
565status_t CameraSource::start(MetaData *meta) {
566    CHECK(!mStarted);
567    if (mInitCheck != OK) {
568        LOGE("CameraSource is not initialized yet");
569        return mInitCheck;
570    }
571
572    char value[PROPERTY_VALUE_MAX];
573    if (property_get("media.stagefright.record-stats", value, NULL)
574        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
575        mCollectStats = true;
576    }
577
578    mStartTimeUs = 0;
579    int64_t startTimeUs;
580    if (meta && meta->findInt64(kKeyTime, &startTimeUs)) {
581        mStartTimeUs = startTimeUs;
582    }
583
584    startCameraRecording();
585
586    mStarted = true;
587    return OK;
588}
589
590void CameraSource::stopCameraRecording() {
591    mCameraRecordingProxy->stopRecording();
592}
593
594void CameraSource::releaseCamera() {
595    LOGV("releaseCamera");
596    if (mCamera != 0) {
597        int64_t token = IPCThreadState::self()->clearCallingIdentity();
598        if ((mCameraFlags & FLAGS_HOT_CAMERA) == 0) {
599            LOGV("Camera was cold when we started, stopping preview");
600            mCamera->stopPreview();
601            mCamera->disconnect();
602        } else {
603            // Unlock the camera so the application can lock it back.
604            mCamera->unlock();
605        }
606        mCamera.clear();
607        IPCThreadState::self()->restoreCallingIdentity(token);
608    }
609    if (mCameraRecordingProxy != 0) {
610        mCameraRecordingProxy->asBinder()->unlinkToDeath(mDeathNotifier);
611        mCameraRecordingProxy.clear();
612    }
613    mCameraFlags = 0;
614}
615
616status_t CameraSource::stop() {
617    LOGD("stop: E");
618    Mutex::Autolock autoLock(mLock);
619    mStarted = false;
620    mFrameAvailableCondition.signal();
621
622    releaseQueuedFrames();
623    while (!mFramesBeingEncoded.empty()) {
624        if (NO_ERROR !=
625            mFrameCompleteCondition.waitRelative(mLock, 3000000000LL)) {
626            LOGW("Timed out waiting for outstanding frames being encoded: %d",
627                mFramesBeingEncoded.size());
628        }
629    }
630    stopCameraRecording();
631    releaseCamera();
632
633    if (mCollectStats) {
634        LOGI("Frames received/encoded/dropped: %d/%d/%d in %lld us",
635                mNumFramesReceived, mNumFramesEncoded, mNumFramesDropped,
636                mLastFrameTimestampUs - mFirstFrameTimeUs);
637    }
638
639    if (mNumGlitches > 0) {
640        LOGW("%d long delays between neighboring video frames", mNumGlitches);
641    }
642
643    CHECK_EQ(mNumFramesReceived, mNumFramesEncoded + mNumFramesDropped);
644    LOGD("stop: X");
645    return OK;
646}
647
648void CameraSource::releaseRecordingFrame(const sp<IMemory>& frame) {
649    if (mCameraRecordingProxy != NULL) {
650        mCameraRecordingProxy->releaseRecordingFrame(frame);
651    }
652}
653
654void CameraSource::releaseQueuedFrames() {
655    List<sp<IMemory> >::iterator it;
656    while (!mFramesReceived.empty()) {
657        it = mFramesReceived.begin();
658        releaseRecordingFrame(*it);
659        mFramesReceived.erase(it);
660        ++mNumFramesDropped;
661    }
662}
663
664sp<MetaData> CameraSource::getFormat() {
665    return mMeta;
666}
667
668void CameraSource::releaseOneRecordingFrame(const sp<IMemory>& frame) {
669    releaseRecordingFrame(frame);
670}
671
672void CameraSource::signalBufferReturned(MediaBuffer *buffer) {
673    LOGV("signalBufferReturned: %p", buffer->data());
674    Mutex::Autolock autoLock(mLock);
675    for (List<sp<IMemory> >::iterator it = mFramesBeingEncoded.begin();
676         it != mFramesBeingEncoded.end(); ++it) {
677        if ((*it)->pointer() ==  buffer->data()) {
678            releaseOneRecordingFrame((*it));
679            mFramesBeingEncoded.erase(it);
680            ++mNumFramesEncoded;
681            buffer->setObserver(0);
682            buffer->release();
683            mFrameCompleteCondition.signal();
684            return;
685        }
686    }
687    CHECK_EQ(0, "signalBufferReturned: bogus buffer");
688}
689
690status_t CameraSource::read(
691        MediaBuffer **buffer, const ReadOptions *options) {
692    LOGV("read");
693
694    *buffer = NULL;
695
696    int64_t seekTimeUs;
697    ReadOptions::SeekMode mode;
698    if (options && options->getSeekTo(&seekTimeUs, &mode)) {
699        return ERROR_UNSUPPORTED;
700    }
701
702    sp<IMemory> frame;
703    int64_t frameTime;
704
705    {
706        Mutex::Autolock autoLock(mLock);
707        while (mStarted && mFramesReceived.empty()) {
708            if (NO_ERROR !=
709                mFrameAvailableCondition.waitRelative(mLock, 1000000000LL)) {
710                if (!mCameraRecordingProxy->asBinder()->isBinderAlive()) {
711                    LOGW("camera recording proxy is gone");
712                    return ERROR_END_OF_STREAM;
713                }
714                LOGW("Timed out waiting for incoming camera video frames: %lld us",
715                    mLastFrameTimestampUs);
716            }
717        }
718        if (!mStarted) {
719            return OK;
720        }
721        frame = *mFramesReceived.begin();
722        mFramesReceived.erase(mFramesReceived.begin());
723
724        frameTime = *mFrameTimes.begin();
725        mFrameTimes.erase(mFrameTimes.begin());
726        mFramesBeingEncoded.push_back(frame);
727        *buffer = new MediaBuffer(frame->pointer(), frame->size());
728        (*buffer)->setObserver(this);
729        (*buffer)->add_ref();
730        (*buffer)->meta_data()->setInt64(kKeyTime, frameTime);
731    }
732    return OK;
733}
734
735void CameraSource::dataCallbackTimestamp(int64_t timestampUs,
736        int32_t msgType, const sp<IMemory> &data) {
737    LOGV("dataCallbackTimestamp: timestamp %lld us", timestampUs);
738    Mutex::Autolock autoLock(mLock);
739    if (!mStarted || (mNumFramesReceived == 0 && timestampUs < mStartTimeUs)) {
740        LOGV("Drop frame at %lld/%lld us", timestampUs, mStartTimeUs);
741        releaseOneRecordingFrame(data);
742        return;
743    }
744
745    if (mNumFramesReceived > 0) {
746        CHECK(timestampUs > mLastFrameTimestampUs);
747        if (timestampUs - mLastFrameTimestampUs > mGlitchDurationThresholdUs) {
748            ++mNumGlitches;
749        }
750    }
751
752    // May need to skip frame or modify timestamp. Currently implemented
753    // by the subclass CameraSourceTimeLapse.
754    if (skipCurrentFrame(timestampUs)) {
755        releaseOneRecordingFrame(data);
756        return;
757    }
758
759    mLastFrameTimestampUs = timestampUs;
760    if (mNumFramesReceived == 0) {
761        mFirstFrameTimeUs = timestampUs;
762        // Initial delay
763        if (mStartTimeUs > 0) {
764            if (timestampUs < mStartTimeUs) {
765                // Frame was captured before recording was started
766                // Drop it without updating the statistical data.
767                releaseOneRecordingFrame(data);
768                return;
769            }
770            mStartTimeUs = timestampUs - mStartTimeUs;
771        }
772    }
773    ++mNumFramesReceived;
774
775    CHECK(data != NULL && data->size() > 0);
776    mFramesReceived.push_back(data);
777    int64_t timeUs = mStartTimeUs + (timestampUs - mFirstFrameTimeUs);
778    mFrameTimes.push_back(timeUs);
779    LOGV("initial delay: %lld, current time stamp: %lld",
780        mStartTimeUs, timeUs);
781    mFrameAvailableCondition.signal();
782}
783
784bool CameraSource::isMetaDataStoredInVideoBuffers() const {
785    LOGV("isMetaDataStoredInVideoBuffers");
786    return mIsMetaDataStoredInVideoBuffers;
787}
788
789CameraSource::ProxyListener::ProxyListener(const sp<CameraSource>& source) {
790    mSource = source;
791}
792
793void CameraSource::ProxyListener::dataCallbackTimestamp(
794        nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) {
795    mSource->dataCallbackTimestamp(timestamp / 1000, msgType, dataPtr);
796}
797
798void CameraSource::DeathNotifier::binderDied(const wp<IBinder>& who) {
799    LOGI("Camera recording proxy died");
800}
801
802}  // namespace android
803