CameraSource.cpp revision cbe48a0678729eb863b259b4744e6ad12faf0475 
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
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
32namespace android {
33
34struct CameraSourceListener : public CameraListener {
35    CameraSourceListener(const sp<CameraSource> &source);
36
37    virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2);
38    virtual void postData(int32_t msgType, const sp<IMemory> &dataPtr);
39
40    virtual void postDataTimestamp(
41            nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
42
43protected:
44    virtual ~CameraSourceListener();
45
46private:
47    wp<CameraSource> mSource;
48
49    CameraSourceListener(const CameraSourceListener &);
50    CameraSourceListener &operator=(const CameraSourceListener &);
51};
52
53CameraSourceListener::CameraSourceListener(const sp<CameraSource> &source)
54    : mSource(source) {
55}
56
57CameraSourceListener::~CameraSourceListener() {
58}
59
60void CameraSourceListener::notify(int32_t msgType, int32_t ext1, int32_t ext2) {
61    LOGV("notify(%d, %d, %d)", msgType, ext1, ext2);
62}
63
64void CameraSourceListener::postData(int32_t msgType, const sp<IMemory> &dataPtr) {
65    LOGV("postData(%d, ptr:%p, size:%d)",
66         msgType, dataPtr->pointer(), dataPtr->size());
67}
68
69void CameraSourceListener::postDataTimestamp(
70        nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) {
71
72    sp<CameraSource> source = mSource.promote();
73    if (source.get() != NULL) {
74        source->dataCallbackTimestamp(timestamp/1000, msgType, dataPtr);
75    }
76}
77
78// static
79CameraSource *CameraSource::Create() {
80    sp<Camera> camera = Camera::connect(0);
81
82    if (camera.get() == NULL) {
83        return NULL;
84    }
85
86    return new CameraSource(camera);
87}
88
89// static
90CameraSource *CameraSource::CreateFromCamera(const sp<Camera> &camera) {
91    if (camera.get() == NULL) {
92        return NULL;
93    }
94
95    return new CameraSource(camera);
96}
97
98CameraSource::CameraSource(const sp<Camera> &camera)
99    : mCamera(camera),
100      mWidth(0),
101      mHeight(0),
102      mFirstFrameTimeUs(0),
103      mLastFrameTimestampUs(0),
104      mNumFramesReceived(0),
105      mNumFramesEncoded(0),
106      mNumFramesDropped(0),
107      mBufferGroup(NULL),
108      mStarted(false) {
109    String8 s = mCamera->getParameters();
110    printf("params: \"%s\"\n", s.string());
111
112    CameraParameters params(s);
113    params.getPreviewSize(&mWidth, &mHeight);
114}
115
116CameraSource::~CameraSource() {
117    if (mStarted) {
118        stop();
119    }
120}
121
122static int bytesPerPixelTimes10(const char *colorFormat) {
123    LOGI("color format: %s", colorFormat);
124    return 20;
125#if 0
126    // XXX: Fix Camera Hal bug?
127    // On sholes, it returns CameraParameters::PIXEL_FORMAT_YUV420SP???
128    if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV422SP) ||
129        !strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV422I)  ||
130        !strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_RGB565)) {
131        return 20;
132    } else if (!strcmp(colorFormat, CameraParameters::PIXEL_FORMAT_YUV420SP)) {
133        return 15;
134    }
135    CHECK_EQ(0, "Unknown color format");
136#endif
137}
138
139status_t CameraSource::start(MetaData *) {
140    LOGV("start");
141    CHECK(!mStarted);
142
143    mCamera->setListener(new CameraSourceListener(this));
144    CHECK_EQ(OK, mCamera->startRecording());
145
146    mStarted = true;
147    mBufferGroup = new MediaBufferGroup();
148    String8 s = mCamera->getParameters();
149    CameraParameters params(s);
150    const char *colorFormat = params.getPreviewFormat();
151    const int size = (mWidth * mHeight * bytesPerPixelTimes10(colorFormat))/10;
152    mBufferGroup->add_buffer(new MediaBuffer(size));
153
154    return OK;
155}
156
157status_t CameraSource::stop() {
158    LOGV("stop");
159    Mutex::Autolock autoLock(mLock);
160    mStarted = false;
161    mFrameAvailableCondition.signal();
162    mCamera->setListener(NULL);
163    mCamera->stopRecording();
164
165    releaseQueuedFrames();
166    delete mBufferGroup;
167    mBufferGroup = NULL;
168    LOGI("Frames received/encoded/dropped: %d/%d/%d, timestamp (us) last/first: %lld/%lld",
169            mNumFramesReceived, mNumFramesEncoded, mNumFramesDropped,
170            mLastFrameTimestampUs, mFirstFrameTimeUs);
171
172    CHECK_EQ(mNumFramesReceived, mNumFramesEncoded + mNumFramesDropped);
173    return OK;
174}
175
176void CameraSource::releaseQueuedFrames() {
177    List<sp<IMemory> >::iterator it;
178    while (!mFrames.empty()) {
179        it = mFrames.begin();
180        mCamera->releaseRecordingFrame(*it);
181        mFrames.erase(it);
182        ++mNumFramesDropped;
183    }
184}
185
186sp<MetaData> CameraSource::getFormat() {
187    sp<MetaData> meta = new MetaData;
188    meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_RAW);
189    meta->setInt32(kKeyColorFormat, OMX_COLOR_FormatYUV420SemiPlanar);
190    meta->setInt32(kKeyWidth, mWidth);
191    meta->setInt32(kKeyHeight, mHeight);
192
193    return meta;
194}
195
196status_t CameraSource::read(
197        MediaBuffer **buffer, const ReadOptions *options) {
198    LOGV("read");
199
200    *buffer = NULL;
201
202    int64_t seekTimeUs;
203    if (options && options->getSeekTo(&seekTimeUs)) {
204        return ERROR_UNSUPPORTED;
205    }
206
207    sp<IMemory> frame;
208    int64_t frameTime;
209
210    {
211        Mutex::Autolock autoLock(mLock);
212        while (mStarted && mFrames.empty()) {
213            mFrameAvailableCondition.wait(mLock);
214        }
215        if (!mStarted) {
216            return OK;
217        }
218        frame = *mFrames.begin();
219        mFrames.erase(mFrames.begin());
220
221        frameTime = *mFrameTimes.begin();
222        mFrameTimes.erase(mFrameTimes.begin());
223        ++mNumFramesEncoded;
224    }
225
226    mBufferGroup->acquire_buffer(buffer);
227    memcpy((*buffer)->data(), frame->pointer(), frame->size());
228    (*buffer)->set_range(0, frame->size());
229    mCamera->releaseRecordingFrame(frame);
230
231    (*buffer)->meta_data()->clear();
232    (*buffer)->meta_data()->setInt64(kKeyTime, frameTime);
233
234    return OK;
235}
236
237void CameraSource::dataCallbackTimestamp(int64_t timestampUs,
238        int32_t msgType, const sp<IMemory> &data) {
239    LOGV("dataCallbackTimestamp: timestamp %lld us", timestampUs);
240    mLastFrameTimestampUs = timestampUs;
241    Mutex::Autolock autoLock(mLock);
242    if (!mStarted) {
243        mCamera->releaseRecordingFrame(data);
244        ++mNumFramesReceived;
245        ++mNumFramesDropped;
246        return;
247    }
248
249    if (mNumFramesReceived == 0) {
250        mFirstFrameTimeUs = timestampUs;
251    }
252    ++mNumFramesReceived;
253
254    mFrames.push_back(data);
255    mFrameTimes.push_back(timestampUs - mFirstFrameTimeUs);
256    mFrameAvailableCondition.signal();
257}
258
259}  // namespace android
260