CameraSource.cpp revision 35a055b8bfc6f3cbea409b2897caf936654519cb 
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 <ui/GraphicBuffer.h>
31#include <ui/Overlay.h>
32#include <surfaceflinger/ISurface.h>
33#include <utils/String8.h>
34
35namespace android {
36
37struct DummySurface : public BnSurface {
38    DummySurface() {}
39
40    virtual sp<GraphicBuffer> requestBuffer(int bufferIdx, int usage) {
41        return NULL;
42    }
43
44    virtual status_t registerBuffers(const BufferHeap &buffers) {
45        return OK;
46    }
47
48    virtual void postBuffer(ssize_t offset) {}
49    virtual void unregisterBuffers() {}
50
51    virtual sp<OverlayRef> createOverlay(
52            uint32_t w, uint32_t h, int32_t format, int32_t orientation) {
53        return NULL;
54    }
55
56protected:
57    virtual ~DummySurface() {}
58
59    DummySurface(const DummySurface &);
60    DummySurface &operator=(const DummySurface &);
61};
62
63struct CameraSourceListener : public CameraListener {
64    CameraSourceListener(const sp<CameraSource> &source);
65
66    virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2);
67    virtual void postData(int32_t msgType, const sp<IMemory> &dataPtr);
68
69    virtual void postDataTimestamp(
70            nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
71
72protected:
73    virtual ~CameraSourceListener();
74
75private:
76    wp<CameraSource> mSource;
77
78    CameraSourceListener(const CameraSourceListener &);
79    CameraSourceListener &operator=(const CameraSourceListener &);
80};
81
82CameraSourceListener::CameraSourceListener(const sp<CameraSource> &source)
83    : mSource(source) {
84}
85
86CameraSourceListener::~CameraSourceListener() {
87}
88
89void CameraSourceListener::notify(int32_t msgType, int32_t ext1, int32_t ext2) {
90    LOGV("notify(%d, %d, %d)", msgType, ext1, ext2);
91}
92
93void CameraSourceListener::postData(int32_t msgType, const sp<IMemory> &dataPtr) {
94    LOGV("postData(%d, ptr:%p, size:%d)",
95         msgType, dataPtr->pointer(), dataPtr->size());
96}
97
98void CameraSourceListener::postDataTimestamp(
99        nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) {
100
101    sp<CameraSource> source = mSource.promote();
102    if (source.get() != NULL) {
103        source->dataCallbackTimestamp(timestamp/1000, msgType, dataPtr);
104    }
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      mWidth(0),
130      mHeight(0),
131      mFirstFrameTimeUs(0),
132      mLastFrameTimestampUs(0),
133      mNumFramesReceived(0),
134      mNumFramesEncoded(0),
135      mNumFramesDropped(0),
136      mStarted(false) {
137    String8 s = mCamera->getParameters();
138    printf("params: \"%s\"\n", s.string());
139
140    CameraParameters params(s);
141    params.getPreviewSize(&mWidth, &mHeight);
142}
143
144CameraSource::~CameraSource() {
145    if (mStarted) {
146        stop();
147    }
148}
149
150void CameraSource::setPreviewSurface(const sp<ISurface> &surface) {
151    mPreviewSurface = surface;
152}
153
154status_t CameraSource::start(MetaData *) {
155    LOGV("start");
156    CHECK(!mStarted);
157
158    mCamera->setListener(new CameraSourceListener(this));
159
160    status_t err =
161        mCamera->setPreviewDisplay(
162                mPreviewSurface != NULL ? mPreviewSurface : new DummySurface);
163    CHECK_EQ(err, OK);
164
165    err = mCamera->startRecording();
166    CHECK_EQ(err, OK);
167
168    mStarted = true;
169
170    return OK;
171}
172
173status_t CameraSource::stop() {
174    LOGV("stop");
175    Mutex::Autolock autoLock(mLock);
176    mStarted = false;
177    mFrameAvailableCondition.signal();
178    mCamera->setListener(NULL);
179    mCamera->stopRecording();
180
181    releaseQueuedFrames();
182    LOGI("Frames received/encoded/dropped: %d/%d/%d, timestamp (us) last/first: %lld/%lld",
183            mNumFramesReceived, mNumFramesEncoded, mNumFramesDropped,
184            mLastFrameTimestampUs, mFirstFrameTimeUs);
185
186    CHECK_EQ(mNumFramesReceived, mNumFramesEncoded + mNumFramesDropped);
187    return OK;
188}
189
190void CameraSource::releaseQueuedFrames() {
191    List<sp<IMemory> >::iterator it;
192    while (!mFrames.empty()) {
193        it = mFrames.begin();
194        mCamera->releaseRecordingFrame(*it);
195        mFrames.erase(it);
196        ++mNumFramesDropped;
197    }
198}
199
200sp<MetaData> CameraSource::getFormat() {
201    sp<MetaData> meta = new MetaData;
202    meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_RAW);
203    meta->setInt32(kKeyColorFormat, OMX_COLOR_FormatYUV420SemiPlanar);
204    meta->setInt32(kKeyWidth, mWidth);
205    meta->setInt32(kKeyHeight, mHeight);
206
207    return meta;
208}
209
210status_t CameraSource::read(
211        MediaBuffer **buffer, const ReadOptions *options) {
212    LOGV("read");
213
214    *buffer = NULL;
215
216    int64_t seekTimeUs;
217    if (options && options->getSeekTo(&seekTimeUs)) {
218        return ERROR_UNSUPPORTED;
219    }
220
221    sp<IMemory> frame;
222    int64_t frameTime;
223
224    {
225        Mutex::Autolock autoLock(mLock);
226        while (mStarted && mFrames.empty()) {
227            mFrameAvailableCondition.wait(mLock);
228        }
229        if (!mStarted) {
230            return OK;
231        }
232        frame = *mFrames.begin();
233        mFrames.erase(mFrames.begin());
234
235        frameTime = *mFrameTimes.begin();
236        mFrameTimes.erase(mFrameTimes.begin());
237        ++mNumFramesEncoded;
238    }
239
240    *buffer = new MediaBuffer(frame->size());
241    memcpy((*buffer)->data(), frame->pointer(), frame->size());
242    (*buffer)->set_range(0, frame->size());
243    mCamera->releaseRecordingFrame(frame);
244
245    (*buffer)->meta_data()->clear();
246    (*buffer)->meta_data()->setInt64(kKeyTime, frameTime);
247
248    return OK;
249}
250
251void CameraSource::dataCallbackTimestamp(int64_t timestampUs,
252        int32_t msgType, const sp<IMemory> &data) {
253    LOGV("dataCallbackTimestamp: timestamp %lld us", timestampUs);
254    mLastFrameTimestampUs = timestampUs;
255    Mutex::Autolock autoLock(mLock);
256    if (!mStarted) {
257        mCamera->releaseRecordingFrame(data);
258        ++mNumFramesReceived;
259        ++mNumFramesDropped;
260        return;
261    }
262
263    if (mNumFramesReceived == 0) {
264        mFirstFrameTimeUs = timestampUs;
265    }
266    ++mNumFramesReceived;
267
268    mFrames.push_back(data);
269    mFrameTimes.push_back(timestampUs - mFirstFrameTimeUs);
270    mFrameAvailableCondition.signal();
271}
272
273}  // namespace android
274