CameraSource.cpp revision a7414ea2c7dfea7d2428ce543bd6331d6c56aead 
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
122status_t CameraSource::start(MetaData *) {
123    LOGV("start");
124    CHECK(!mStarted);
125
126    mCamera->setListener(new CameraSourceListener(this));
127    CHECK_EQ(OK, mCamera->startRecording());
128
129    mStarted = true;
130    return OK;
131}
132
133status_t CameraSource::stop() {
134    LOGV("stop");
135    Mutex::Autolock autoLock(mLock);
136    mStarted = false;
137    mFrameAvailableCondition.signal();
138    mCamera->setListener(NULL);
139    mCamera->stopRecording();
140
141    releaseQueuedFrames();
142    delete mBufferGroup;
143    mBufferGroup = NULL;
144    LOGI("Frames received/encoded/dropped: %d/%d/%d, timestamp (us) last/first: %lld/%lld",
145            mNumFramesReceived, mNumFramesEncoded, mNumFramesDropped,
146            mLastFrameTimestampUs, mFirstFrameTimeUs);
147
148    CHECK_EQ(mNumFramesReceived, mNumFramesEncoded + mNumFramesDropped);
149    return OK;
150}
151
152void CameraSource::releaseQueuedFrames() {
153    List<sp<IMemory> >::iterator it;
154    while (!mFrames.empty()) {
155        it = mFrames.begin();
156        mCamera->releaseRecordingFrame(*it);
157        mFrames.erase(it);
158        ++mNumFramesDropped;
159    }
160}
161
162sp<MetaData> CameraSource::getFormat() {
163    sp<MetaData> meta = new MetaData;
164    meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_RAW);
165    meta->setInt32(kKeyColorFormat, OMX_COLOR_FormatYUV420SemiPlanar);
166    meta->setInt32(kKeyWidth, mWidth);
167    meta->setInt32(kKeyHeight, mHeight);
168
169    return meta;
170}
171
172status_t CameraSource::read(
173        MediaBuffer **buffer, const ReadOptions *options) {
174    LOGV("read");
175
176    *buffer = NULL;
177
178    int64_t seekTimeUs;
179    if (options && options->getSeekTo(&seekTimeUs)) {
180        return ERROR_UNSUPPORTED;
181    }
182
183    sp<IMemory> frame;
184    int64_t frameTime;
185
186    {
187        Mutex::Autolock autoLock(mLock);
188        while (mStarted && mFrames.empty()) {
189            mFrameAvailableCondition.wait(mLock);
190        }
191        if (!mStarted) {
192            return OK;
193        }
194        frame = *mFrames.begin();
195        mFrames.erase(mFrames.begin());
196
197        frameTime = *mFrameTimes.begin();
198        mFrameTimes.erase(mFrameTimes.begin());
199        ++mNumFramesEncoded;
200    }
201    if (mBufferGroup == NULL) {
202        mBufferGroup = new MediaBufferGroup();
203        CHECK(mBufferGroup != NULL);
204        mBufferGroup->add_buffer(new MediaBuffer(frame->size()));
205    }
206
207    mBufferGroup->acquire_buffer(buffer);
208    memcpy((*buffer)->data(), frame->pointer(), frame->size());
209    (*buffer)->set_range(0, frame->size());
210    mCamera->releaseRecordingFrame(frame);
211
212    (*buffer)->meta_data()->clear();
213    (*buffer)->meta_data()->setInt64(kKeyTime, frameTime);
214
215    return OK;
216}
217
218void CameraSource::dataCallbackTimestamp(int64_t timestampUs,
219        int32_t msgType, const sp<IMemory> &data) {
220    LOGV("dataCallbackTimestamp: timestamp %lld us", timestampUs);
221    mLastFrameTimestampUs = timestampUs;
222    Mutex::Autolock autoLock(mLock);
223    if (!mStarted) {
224        mCamera->releaseRecordingFrame(data);
225        ++mNumFramesReceived;
226        ++mNumFramesDropped;
227        return;
228    }
229
230    if (mNumFramesReceived == 0) {
231        mFirstFrameTimeUs = timestampUs;
232    }
233    ++mNumFramesReceived;
234
235    mFrames.push_back(data);
236    mFrameTimes.push_back(timestampUs - mFirstFrameTimeUs);
237    mFrameAvailableCondition.signal();
238}
239
240}  // namespace android
241