CameraSource.cpp revision 0a1b9dcf0106731e1b8113fb77e933ffaf70bd0b 
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 <utils/String8.h>
31#include <cutils/properties.h>
32
33namespace android {
34
35struct CameraSourceListener : public CameraListener {
36    CameraSourceListener(const sp<CameraSource> &source);
37
38    virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2);
39    virtual void postData(int32_t msgType, const sp<IMemory> &dataPtr);
40
41    virtual void postDataTimestamp(
42            nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
43
44protected:
45    virtual ~CameraSourceListener();
46
47private:
48    wp<CameraSource> mSource;
49
50    CameraSourceListener(const CameraSourceListener &);
51    CameraSourceListener &operator=(const CameraSourceListener &);
52};
53
54CameraSourceListener::CameraSourceListener(const sp<CameraSource> &source)
55    : mSource(source) {
56}
57
58CameraSourceListener::~CameraSourceListener() {
59}
60
61void CameraSourceListener::notify(int32_t msgType, int32_t ext1, int32_t ext2) {
62    LOGV("notify(%d, %d, %d)", msgType, ext1, ext2);
63}
64
65void CameraSourceListener::postData(int32_t msgType, const sp<IMemory> &dataPtr) {
66    LOGV("postData(%d, ptr:%p, size:%d)",
67         msgType, dataPtr->pointer(), dataPtr->size());
68
69    sp<CameraSource> source = mSource.promote();
70    if (source.get() != NULL) {
71        source->dataCallback(msgType, dataPtr);
72    }
73}
74
75void CameraSourceListener::postDataTimestamp(
76        nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) {
77
78    sp<CameraSource> source = mSource.promote();
79    if (source.get() != NULL) {
80        source->dataCallbackTimestamp(timestamp/1000, msgType, dataPtr);
81    }
82}
83
84static int32_t getColorFormat(const char* colorFormat) {
85    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV422SP)) {
86       return OMX_COLOR_FormatYUV422SemiPlanar;
87    }
88
89    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV420SP)) {
90        return OMX_COLOR_FormatYUV420SemiPlanar;
91    }
92
93    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV422I)) {
94        return OMX_COLOR_FormatYCbYCr;
95    }
96
97    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_RGB565)) {
98       return OMX_COLOR_Format16bitRGB565;
99    }
100
101    LOGE("Uknown color format (%s), please add it to "
102         "CameraSource::getColorFormat", colorFormat);
103
104    CHECK_EQ(0, "Unknown color format");
105}
106
107// static
108CameraSource *CameraSource::Create() {
109    sp<Camera> camera = Camera::connect(0);
110
111    if (camera.get() == NULL) {
112        return NULL;
113    }
114
115    return new CameraSource(camera);
116}
117
118// static
119CameraSource *CameraSource::CreateFromCamera(const sp<Camera> &camera) {
120    if (camera.get() == NULL) {
121        return NULL;
122    }
123
124    return new CameraSource(camera);
125}
126
127CameraSource::CameraSource(const sp<Camera> &camera)
128    : mCamera(camera),
129      mNumFramesReceived(0),
130      mLastFrameTimestampUs(0),
131      mStarted(false),
132      mFirstFrameTimeUs(0),
133      mNumFramesEncoded(0),
134      mNumFramesDropped(0),
135      mNumGlitches(0),
136      mGlitchDurationThresholdUs(200000),
137      mCollectStats(false) {
138
139    int64_t token = IPCThreadState::self()->clearCallingIdentity();
140    String8 s = mCamera->getParameters();
141    IPCThreadState::self()->restoreCallingIdentity(token);
142
143    printf("params: \"%s\"\n", s.string());
144
145    int32_t width, height, stride, sliceHeight;
146    CameraParameters params(s);
147    params.getPreviewSize(&width, &height);
148
149    // Calculate glitch duraton threshold based on frame rate
150    int32_t frameRate = params.getPreviewFrameRate();
151    int64_t glitchDurationUs = (1000000LL / frameRate);
152    if (glitchDurationUs > mGlitchDurationThresholdUs) {
153        mGlitchDurationThresholdUs = glitchDurationUs;
154    }
155
156    const char *colorFormatStr = params.get(CameraParameters::KEY_VIDEO_FRAME_FORMAT);
157    CHECK(colorFormatStr != NULL);
158    int32_t colorFormat = getColorFormat(colorFormatStr);
159
160    // XXX: query camera for the stride and slice height
161    // when the capability becomes available.
162    stride = width;
163    sliceHeight = height;
164
165    mMeta = new MetaData;
166    mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_RAW);
167    mMeta->setInt32(kKeyColorFormat, colorFormat);
168    mMeta->setInt32(kKeyWidth, width);
169    mMeta->setInt32(kKeyHeight, height);
170    mMeta->setInt32(kKeyStride, stride);
171    mMeta->setInt32(kKeySliceHeight, sliceHeight);
172}
173
174CameraSource::~CameraSource() {
175    if (mStarted) {
176        stop();
177    }
178}
179
180void CameraSource::startCameraRecording() {
181    CHECK_EQ(OK, mCamera->startRecording());
182}
183
184status_t CameraSource::start(MetaData *meta) {
185    CHECK(!mStarted);
186
187    char value[PROPERTY_VALUE_MAX];
188    if (property_get("media.stagefright.record-stats", value, NULL)
189        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
190        mCollectStats = true;
191    }
192
193    mStartTimeUs = 0;
194    int64_t startTimeUs;
195    if (meta && meta->findInt64(kKeyTime, &startTimeUs)) {
196        mStartTimeUs = startTimeUs;
197    }
198
199    int64_t token = IPCThreadState::self()->clearCallingIdentity();
200    mCamera->setListener(new CameraSourceListener(this));
201    startCameraRecording();
202    IPCThreadState::self()->restoreCallingIdentity(token);
203
204    mStarted = true;
205    return OK;
206}
207
208void CameraSource::stopCameraRecording() {
209    mCamera->stopRecording();
210}
211
212status_t CameraSource::stop() {
213    LOGV("stop");
214    Mutex::Autolock autoLock(mLock);
215    mStarted = false;
216    mFrameAvailableCondition.signal();
217
218    int64_t token = IPCThreadState::self()->clearCallingIdentity();
219    mCamera->setListener(NULL);
220    stopCameraRecording();
221    releaseQueuedFrames();
222    while (!mFramesBeingEncoded.empty()) {
223        LOGI("Waiting for outstanding frames being encoded: %d",
224                mFramesBeingEncoded.size());
225        mFrameCompleteCondition.wait(mLock);
226    }
227    mCamera = NULL;
228    IPCThreadState::self()->restoreCallingIdentity(token);
229
230    if (mCollectStats) {
231        LOGI("Frames received/encoded/dropped: %d/%d/%d in %lld us",
232                mNumFramesReceived, mNumFramesEncoded, mNumFramesDropped,
233                mLastFrameTimestampUs - mFirstFrameTimeUs);
234    }
235
236    CHECK_EQ(mNumFramesReceived, mNumFramesEncoded + mNumFramesDropped);
237    return OK;
238}
239
240void CameraSource::releaseRecordingFrame(const sp<IMemory>& frame) {
241    mCamera->releaseRecordingFrame(frame);
242}
243
244void CameraSource::releaseQueuedFrames() {
245    List<sp<IMemory> >::iterator it;
246    while (!mFramesReceived.empty()) {
247        it = mFramesReceived.begin();
248        releaseRecordingFrame(*it);
249        mFramesReceived.erase(it);
250        ++mNumFramesDropped;
251    }
252}
253
254sp<MetaData> CameraSource::getFormat() {
255    return mMeta;
256}
257
258void CameraSource::releaseOneRecordingFrame(const sp<IMemory>& frame) {
259    int64_t token = IPCThreadState::self()->clearCallingIdentity();
260    releaseRecordingFrame(frame);
261    IPCThreadState::self()->restoreCallingIdentity(token);
262}
263
264void CameraSource::signalBufferReturned(MediaBuffer *buffer) {
265    LOGV("signalBufferReturned: %p", buffer->data());
266    Mutex::Autolock autoLock(mLock);
267    for (List<sp<IMemory> >::iterator it = mFramesBeingEncoded.begin();
268         it != mFramesBeingEncoded.end(); ++it) {
269        if ((*it)->pointer() ==  buffer->data()) {
270            releaseOneRecordingFrame((*it));
271            mFramesBeingEncoded.erase(it);
272            ++mNumFramesEncoded;
273            buffer->setObserver(0);
274            buffer->release();
275            mFrameCompleteCondition.signal();
276            return;
277        }
278    }
279    CHECK_EQ(0, "signalBufferReturned: bogus buffer");
280}
281
282status_t CameraSource::read(
283        MediaBuffer **buffer, const ReadOptions *options) {
284    LOGV("read");
285
286    *buffer = NULL;
287
288    int64_t seekTimeUs;
289    ReadOptions::SeekMode mode;
290    if (options && options->getSeekTo(&seekTimeUs, &mode)) {
291        return ERROR_UNSUPPORTED;
292    }
293
294    sp<IMemory> frame;
295    int64_t frameTime;
296
297    {
298        Mutex::Autolock autoLock(mLock);
299        while (mStarted) {
300            while(mFramesReceived.empty()) {
301                mFrameAvailableCondition.wait(mLock);
302            }
303
304            if (!mStarted) {
305                return OK;
306            }
307
308            frame = *mFramesReceived.begin();
309            mFramesReceived.erase(mFramesReceived.begin());
310
311            frameTime = *mFrameTimes.begin();
312            mFrameTimes.erase(mFrameTimes.begin());
313            int64_t skipTimeUs;
314            if (!options || !options->getSkipFrame(&skipTimeUs)) {
315                skipTimeUs = frameTime;
316            }
317            if (skipTimeUs > frameTime) {
318                LOGV("skipTimeUs: %lld us > frameTime: %lld us",
319                    skipTimeUs, frameTime);
320                releaseOneRecordingFrame(frame);
321                ++mNumFramesDropped;
322                // Safeguard against the abuse of the kSkipFrame_Option.
323                if (skipTimeUs - frameTime >= 1E6) {
324                    LOGE("Frame skipping requested is way too long: %lld us",
325                        skipTimeUs - frameTime);
326                    return UNKNOWN_ERROR;
327                }
328            } else {
329                mFramesBeingEncoded.push_back(frame);
330                *buffer = new MediaBuffer(frame->pointer(), frame->size());
331                (*buffer)->setObserver(this);
332                (*buffer)->add_ref();
333                (*buffer)->meta_data()->setInt64(kKeyTime, frameTime);
334
335                return OK;
336            }
337        }
338    }
339    return OK;
340}
341
342void CameraSource::dataCallbackTimestamp(int64_t timestampUs,
343        int32_t msgType, const sp<IMemory> &data) {
344    LOGV("dataCallbackTimestamp: timestamp %lld us", timestampUs);
345    Mutex::Autolock autoLock(mLock);
346    if (!mStarted) {
347        releaseOneRecordingFrame(data);
348        ++mNumFramesReceived;
349        ++mNumFramesDropped;
350        return;
351    }
352
353    if (mNumFramesReceived > 0 &&
354        timestampUs - mLastFrameTimestampUs > mGlitchDurationThresholdUs) {
355        if (mNumGlitches % 10 == 0) {  // Don't spam the log
356            LOGW("Long delay detected in video recording");
357        }
358        ++mNumGlitches;
359    }
360
361    // May need to skip frame or modify timestamp. Currently implemented
362    // by the subclass CameraSourceTimeLapse.
363    if(skipCurrentFrame(timestampUs)) {
364        releaseOneRecordingFrame(data);
365        return;
366    }
367
368    mLastFrameTimestampUs = timestampUs;
369    if (mNumFramesReceived == 0) {
370        mFirstFrameTimeUs = timestampUs;
371        // Initial delay
372        if (mStartTimeUs > 0) {
373            if (timestampUs < mStartTimeUs) {
374                // Frame was captured before recording was started
375                // Drop it without updating the statistical data.
376                releaseOneRecordingFrame(data);
377                return;
378            }
379            mStartTimeUs = timestampUs - mStartTimeUs;
380        }
381    }
382    ++mNumFramesReceived;
383
384    mFramesReceived.push_back(data);
385    int64_t timeUs = mStartTimeUs + (timestampUs - mFirstFrameTimeUs);
386    mFrameTimes.push_back(timeUs);
387    LOGV("initial delay: %lld, current time stamp: %lld",
388        mStartTimeUs, timeUs);
389    mFrameAvailableCondition.signal();
390}
391
392}  // namespace android
393