CameraSource.cpp revision 56223b96c2f6de5998496fac9d6703f06adc1dca 
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
70void CameraSourceListener::postDataTimestamp(
71        nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) {
72
73    sp<CameraSource> source = mSource.promote();
74    if (source.get() != NULL) {
75        source->dataCallbackTimestamp(timestamp/1000, msgType, dataPtr);
76    }
77}
78
79static int32_t getColorFormat(const char* colorFormat) {
80    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV422SP)) {
81       return OMX_COLOR_FormatYUV422SemiPlanar;
82    }
83
84    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV420SP)) {
85        return OMX_COLOR_FormatYUV420SemiPlanar;
86    }
87
88    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV422I)) {
89        return OMX_COLOR_FormatYCbYCr;
90    }
91
92    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_RGB565)) {
93       return OMX_COLOR_Format16bitRGB565;
94    }
95
96    CHECK_EQ(0, "Unknown color format");
97}
98
99// static
100CameraSource *CameraSource::Create() {
101    sp<Camera> camera = Camera::connect(0);
102
103    if (camera.get() == NULL) {
104        return NULL;
105    }
106
107    return new CameraSource(camera);
108}
109
110// static
111CameraSource *CameraSource::CreateFromCamera(const sp<Camera> &camera) {
112    if (camera.get() == NULL) {
113        return NULL;
114    }
115
116    return new CameraSource(camera);
117}
118
119CameraSource::CameraSource(const sp<Camera> &camera)
120    : mCamera(camera),
121      mFirstFrameTimeUs(0),
122      mLastFrameTimestampUs(0),
123      mNumFramesReceived(0),
124      mNumFramesEncoded(0),
125      mNumFramesDropped(0),
126      mNumGlitches(0),
127      mGlitchDurationThresholdUs(200000),
128      mCollectStats(false),
129      mStarted(false) {
130
131    int64_t token = IPCThreadState::self()->clearCallingIdentity();
132    String8 s = mCamera->getParameters();
133    IPCThreadState::self()->restoreCallingIdentity(token);
134
135    printf("params: \"%s\"\n", s.string());
136
137    int32_t width, height, stride, sliceHeight;
138    CameraParameters params(s);
139    params.getPreviewSize(&width, &height);
140
141    // Calculate glitch duraton threshold based on frame rate
142    int32_t frameRate = params.getPreviewFrameRate();
143    int64_t glitchDurationUs = (1000000LL / frameRate);
144    if (glitchDurationUs > mGlitchDurationThresholdUs) {
145        mGlitchDurationThresholdUs = glitchDurationUs;
146    }
147
148    const char *colorFormatStr = params.get(CameraParameters::KEY_VIDEO_FRAME_FORMAT);
149    CHECK(colorFormatStr != NULL);
150    int32_t colorFormat = getColorFormat(colorFormatStr);
151
152    // XXX: query camera for the stride and slice height
153    // when the capability becomes available.
154    stride = width;
155    sliceHeight = height;
156
157    mMeta = new MetaData;
158    mMeta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_RAW);
159    mMeta->setInt32(kKeyColorFormat, colorFormat);
160    mMeta->setInt32(kKeyWidth, width);
161    mMeta->setInt32(kKeyHeight, height);
162    mMeta->setInt32(kKeyStride, stride);
163    mMeta->setInt32(kKeySliceHeight, sliceHeight);
164
165}
166
167CameraSource::~CameraSource() {
168    if (mStarted) {
169        stop();
170    }
171}
172
173status_t CameraSource::start(MetaData *meta) {
174    CHECK(!mStarted);
175
176    char value[PROPERTY_VALUE_MAX];
177    if (property_get("media.stagefright.record-stats", value, NULL)
178        && (!strcmp(value, "1") || !strcasecmp(value, "true"))) {
179        mCollectStats = true;
180    }
181
182    mStartTimeUs = 0;
183    int64_t startTimeUs;
184    if (meta && meta->findInt64(kKeyTime, &startTimeUs)) {
185        mStartTimeUs = startTimeUs;
186    }
187
188    int64_t token = IPCThreadState::self()->clearCallingIdentity();
189    mCamera->setListener(new CameraSourceListener(this));
190    CHECK_EQ(OK, mCamera->startRecording());
191    IPCThreadState::self()->restoreCallingIdentity(token);
192
193    mStarted = true;
194    return OK;
195}
196
197status_t CameraSource::stop() {
198    LOGV("stop");
199    Mutex::Autolock autoLock(mLock);
200    mStarted = false;
201    mFrameAvailableCondition.signal();
202
203    int64_t token = IPCThreadState::self()->clearCallingIdentity();
204    mCamera->setListener(NULL);
205    mCamera->stopRecording();
206    releaseQueuedFrames();
207    while (!mFramesBeingEncoded.empty()) {
208        LOGI("Waiting for outstanding frames being encoded: %d",
209                mFramesBeingEncoded.size());
210        mFrameCompleteCondition.wait(mLock);
211    }
212    mCamera = NULL;
213    IPCThreadState::self()->restoreCallingIdentity(token);
214
215    if (mCollectStats) {
216        LOGI("Frames received/encoded/dropped: %d/%d/%d in %lld us",
217                mNumFramesReceived, mNumFramesEncoded, mNumFramesDropped,
218                mLastFrameTimestampUs - mFirstFrameTimeUs);
219    }
220
221    CHECK_EQ(mNumFramesReceived, mNumFramesEncoded + mNumFramesDropped);
222    return OK;
223}
224
225void CameraSource::releaseQueuedFrames() {
226    List<sp<IMemory> >::iterator it;
227    while (!mFramesReceived.empty()) {
228        it = mFramesReceived.begin();
229        mCamera->releaseRecordingFrame(*it);
230        mFramesReceived.erase(it);
231        ++mNumFramesDropped;
232    }
233}
234
235sp<MetaData> CameraSource::getFormat() {
236    return mMeta;
237}
238
239void CameraSource::releaseOneRecordingFrame(const sp<IMemory>& frame) {
240    int64_t token = IPCThreadState::self()->clearCallingIdentity();
241    mCamera->releaseRecordingFrame(frame);
242    IPCThreadState::self()->restoreCallingIdentity(token);
243}
244
245void CameraSource::signalBufferReturned(MediaBuffer *buffer) {
246    LOGV("signalBufferReturned: %p", buffer->data());
247    Mutex::Autolock autoLock(mLock);
248    for (List<sp<IMemory> >::iterator it = mFramesBeingEncoded.begin();
249         it != mFramesBeingEncoded.end(); ++it) {
250        if ((*it)->pointer() ==  buffer->data()) {
251
252            releaseOneRecordingFrame((*it));
253            mFramesBeingEncoded.erase(it);
254            ++mNumFramesEncoded;
255            buffer->setObserver(0);
256            buffer->release();
257            mFrameCompleteCondition.signal();
258            return;
259        }
260    }
261    CHECK_EQ(0, "signalBufferReturned: bogus buffer");
262}
263
264status_t CameraSource::read(
265        MediaBuffer **buffer, const ReadOptions *options) {
266    LOGV("read");
267
268    *buffer = NULL;
269
270    int64_t seekTimeUs;
271    ReadOptions::SeekMode mode;
272    if (options && options->getSeekTo(&seekTimeUs, &mode)) {
273        return ERROR_UNSUPPORTED;
274    }
275
276    sp<IMemory> frame;
277    int64_t frameTime;
278
279    {
280        Mutex::Autolock autoLock(mLock);
281        while (mStarted) {
282            while(mFramesReceived.empty()) {
283                mFrameAvailableCondition.wait(mLock);
284            }
285
286            if (!mStarted) {
287                return OK;
288            }
289
290            frame = *mFramesReceived.begin();
291            mFramesReceived.erase(mFramesReceived.begin());
292
293            frameTime = *mFrameTimes.begin();
294            mFrameTimes.erase(mFrameTimes.begin());
295            int64_t skipTimeUs;
296            if (!options || !options->getSkipFrame(&skipTimeUs)) {
297                skipTimeUs = frameTime;
298            }
299            if (skipTimeUs > frameTime) {
300                LOGV("skipTimeUs: %lld us > frameTime: %lld us",
301                    skipTimeUs, frameTime);
302                releaseOneRecordingFrame(frame);
303                ++mNumFramesDropped;
304                // Safeguard against the abuse of the kSkipFrame_Option.
305                if (skipTimeUs - frameTime >= 1E6) {
306                    LOGE("Frame skipping requested is way too long: %lld us",
307                        skipTimeUs - frameTime);
308                    return UNKNOWN_ERROR;
309                }
310            } else {
311                mFramesBeingEncoded.push_back(frame);
312                *buffer = new MediaBuffer(frame->pointer(), frame->size());
313                (*buffer)->setObserver(this);
314                (*buffer)->add_ref();
315                (*buffer)->meta_data()->setInt64(kKeyTime, frameTime);
316
317                return OK;
318            }
319        }
320    }
321    return OK;
322}
323
324void CameraSource::dataCallbackTimestamp(int64_t timestampUs,
325        int32_t msgType, const sp<IMemory> &data) {
326    LOGV("dataCallbackTimestamp: timestamp %lld us", timestampUs);
327    Mutex::Autolock autoLock(mLock);
328    if (!mStarted) {
329        releaseOneRecordingFrame(data);
330        ++mNumFramesReceived;
331        ++mNumFramesDropped;
332        return;
333    }
334
335    if (mNumFramesReceived > 0 &&
336        timestampUs - mLastFrameTimestampUs > mGlitchDurationThresholdUs) {
337        if (mNumGlitches % 10 == 0) {  // Don't spam the log
338            LOGW("Long delay detected in video recording");
339        }
340        ++mNumGlitches;
341    }
342
343    mLastFrameTimestampUs = timestampUs;
344    if (mNumFramesReceived == 0) {
345        mFirstFrameTimeUs = timestampUs;
346        // Initial delay
347        if (mStartTimeUs > 0) {
348            if (timestampUs < mStartTimeUs) {
349                // Frame was captured before recording was started
350                // Drop it without updating the statistical data.
351                releaseOneRecordingFrame(data);
352                return;
353            }
354            mStartTimeUs = timestampUs - mStartTimeUs;
355        }
356    }
357    ++mNumFramesReceived;
358
359    mFramesReceived.push_back(data);
360    int64_t timeUs = mStartTimeUs + (timestampUs - mFirstFrameTimeUs);
361    mFrameTimes.push_back(timeUs);
362    LOGV("initial delay: %lld, current time stamp: %lld",
363        mStartTimeUs, timeUs);
364    mFrameAvailableCondition.signal();
365}
366
367}  // namespace android
368