CameraSource.cpp revision 7278cf32f1aa6a322f6dff1f8b7dacf7b6dddba6 
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      mStarted(false) {
108    String8 s = mCamera->getParameters();
109    printf("params: \"%s\"\n", s.string());
110
111    CameraParameters params(s);
112    params.getPreviewSize(&mWidth, &mHeight);
113}
114
115CameraSource::~CameraSource() {
116    if (mStarted) {
117        stop();
118    }
119}
120
121status_t CameraSource::start(MetaData *) {
122    LOGV("start");
123    CHECK(!mStarted);
124
125    mCamera->setListener(new CameraSourceListener(this));
126    CHECK_EQ(OK, mCamera->startRecording());
127
128    mStarted = true;
129    return OK;
130}
131
132status_t CameraSource::stop() {
133    LOGV("stop");
134    Mutex::Autolock autoLock(mLock);
135    mStarted = false;
136    mFrameAvailableCondition.signal();
137    mCamera->setListener(NULL);
138    mCamera->stopRecording();
139
140    releaseQueuedFrames();
141
142    while (!mFramesBeingEncoded.empty()) {
143        LOGI("Number of outstanding frames is being encoded: %d", mFramesBeingEncoded.size());
144        mFrameCompleteCondition.wait(mLock);
145    }
146
147    LOGI("Frames received/encoded/dropped: %d/%d/%d, timestamp (us) last/first: %lld/%lld",
148            mNumFramesReceived, mNumFramesEncoded, mNumFramesDropped,
149            mLastFrameTimestampUs, mFirstFrameTimeUs);
150
151    CHECK_EQ(mNumFramesReceived, mNumFramesEncoded + mNumFramesDropped);
152    return OK;
153}
154
155void CameraSource::releaseQueuedFrames() {
156    List<sp<IMemory> >::iterator it;
157    while (!mFramesReceived.empty()) {
158        it = mFramesReceived.begin();
159        mCamera->releaseRecordingFrame(*it);
160        mFramesReceived.erase(it);
161        ++mNumFramesDropped;
162    }
163}
164
165sp<MetaData> CameraSource::getFormat() {
166    sp<MetaData> meta = new MetaData;
167    meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_RAW);
168    meta->setInt32(kKeyColorFormat, OMX_COLOR_FormatYUV420SemiPlanar);
169    meta->setInt32(kKeyWidth, mWidth);
170    meta->setInt32(kKeyHeight, mHeight);
171
172    return meta;
173}
174
175void CameraSource::signalBufferReturned(MediaBuffer *buffer) {
176    LOGV("signalBufferReturned: %p", buffer->data());
177    for (List<sp<IMemory> >::iterator it = mFramesBeingEncoded.begin();
178         it != mFramesBeingEncoded.end(); ++it) {
179        if ((*it)->pointer() ==  buffer->data()) {
180            mCamera->releaseRecordingFrame((*it));
181            mFramesBeingEncoded.erase(it);
182            ++mNumFramesEncoded;
183            buffer->setObserver(0);
184            buffer->release();
185            mFrameCompleteCondition.signal();
186            return;
187        }
188    }
189    CHECK_EQ(0, "signalBufferReturned: bogus buffer");
190}
191
192status_t CameraSource::read(
193        MediaBuffer **buffer, const ReadOptions *options) {
194    LOGV("read");
195
196    *buffer = NULL;
197
198    int64_t seekTimeUs;
199    if (options && options->getSeekTo(&seekTimeUs)) {
200        return ERROR_UNSUPPORTED;
201    }
202
203    sp<IMemory> frame;
204    int64_t frameTime;
205
206    {
207        Mutex::Autolock autoLock(mLock);
208        while (mStarted && mFramesReceived.empty()) {
209            mFrameAvailableCondition.wait(mLock);
210        }
211        if (!mStarted) {
212            return OK;
213        }
214        frame = *mFramesReceived.begin();
215        mFramesReceived.erase(mFramesReceived.begin());
216
217        frameTime = *mFrameTimes.begin();
218        mFrameTimes.erase(mFrameTimes.begin());
219
220        mFramesBeingEncoded.push_back(frame);
221        *buffer = new MediaBuffer(frame->pointer(), frame->size());
222        (*buffer)->setObserver(this);
223        (*buffer)->add_ref();
224        (*buffer)->meta_data()->setInt64(kKeyTime, frameTime);
225    }
226    return OK;
227}
228
229void CameraSource::dataCallbackTimestamp(int64_t timestampUs,
230        int32_t msgType, const sp<IMemory> &data) {
231    LOGV("dataCallbackTimestamp: timestamp %lld us", timestampUs);
232    mLastFrameTimestampUs = timestampUs;
233    Mutex::Autolock autoLock(mLock);
234    if (!mStarted) {
235        mCamera->releaseRecordingFrame(data);
236        ++mNumFramesReceived;
237        ++mNumFramesDropped;
238        return;
239    }
240
241    if (mNumFramesReceived == 0) {
242        mFirstFrameTimeUs = timestampUs;
243    }
244    ++mNumFramesReceived;
245
246    mFramesReceived.push_back(data);
247    mFrameTimes.push_back(timestampUs - mFirstFrameTimeUs);
248    mFrameAvailableCondition.signal();
249}
250
251}  // namespace android
252