CameraSource.cpp revision be5c74f5da6a93b0d23f96e11848acfcc3b4d1d9 
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#include <sys/time.h>
18
19#include <OMX_Component.h>
20
21#include <binder/IServiceManager.h>
22#include <media/stagefright/CameraSource.h>
23#include <media/stagefright/MediaDebug.h>
24#include <media/stagefright/MediaDefs.h>
25#include <media/stagefright/MediaErrors.h>
26#include <media/stagefright/MetaData.h>
27#include <ui/Camera.h>
28#include <ui/CameraParameters.h>
29#include <ui/GraphicBuffer.h>
30#include <ui/ISurface.h>
31#include <ui/Overlay.h>
32#include <utils/String8.h>
33
34namespace android {
35
36static int64_t getNowUs() {
37    struct timeval tv;
38    gettimeofday(&tv, NULL);
39
40    return (int64_t)tv.tv_usec + tv.tv_sec * 1000000;
41}
42
43struct DummySurface : public BnSurface {
44    DummySurface() {}
45
46    virtual sp<GraphicBuffer> requestBuffer(int bufferIdx, int usage) {
47        return NULL;
48    }
49
50    virtual status_t registerBuffers(const BufferHeap &buffers) {
51        return OK;
52    }
53
54    virtual void postBuffer(ssize_t offset) {}
55    virtual void unregisterBuffers() {}
56
57    virtual sp<OverlayRef> createOverlay(
58            uint32_t w, uint32_t h, int32_t format) {
59        return NULL;
60    }
61
62protected:
63    virtual ~DummySurface() {}
64
65    DummySurface(const DummySurface &);
66    DummySurface &operator=(const DummySurface &);
67};
68
69struct CameraSourceListener : public CameraListener {
70    CameraSourceListener(const sp<CameraSource> &source);
71
72    virtual void notify(int32_t msgType, int32_t ext1, int32_t ext2);
73    virtual void postData(int32_t msgType, const sp<IMemory> &dataPtr);
74
75    virtual void postDataTimestamp(
76            nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr);
77
78protected:
79    virtual ~CameraSourceListener();
80
81private:
82    wp<CameraSource> mSource;
83
84    CameraSourceListener(const CameraSourceListener &);
85    CameraSourceListener &operator=(const CameraSourceListener &);
86};
87
88CameraSourceListener::CameraSourceListener(const sp<CameraSource> &source)
89    : mSource(source) {
90}
91
92CameraSourceListener::~CameraSourceListener() {
93}
94
95void CameraSourceListener::notify(int32_t msgType, int32_t ext1, int32_t ext2) {
96    LOGV("notify(%d, %d, %d)", msgType, ext1, ext2);
97}
98
99void CameraSourceListener::postData(int32_t msgType, const sp<IMemory> &dataPtr) {
100    LOGV("postData(%d, ptr:%p, size:%d)",
101         msgType, dataPtr->pointer(), dataPtr->size());
102
103    sp<CameraSource> source = mSource.promote();
104    if (source.get() != NULL) {
105        source->dataCallback(msgType, dataPtr);
106    }
107}
108
109void CameraSourceListener::postDataTimestamp(
110        nsecs_t timestamp, int32_t msgType, const sp<IMemory>& dataPtr) {
111    LOGV("postDataTimestamp(%lld, %d, ptr:%p, size:%d)",
112         timestamp, msgType, dataPtr->pointer(), dataPtr->size());
113}
114
115// static
116CameraSource *CameraSource::Create() {
117    sp<Camera> camera = Camera::connect();
118
119    if (camera.get() == NULL) {
120        return NULL;
121    }
122
123    return new CameraSource(camera);
124}
125
126CameraSource::CameraSource(const sp<Camera> &camera)
127    : mCamera(camera),
128      mWidth(0),
129      mHeight(0),
130      mFirstFrameTimeUs(0),
131      mNumFrames(0),
132      mStarted(false) {
133    String8 s = mCamera->getParameters();
134    printf("params: \"%s\"\n", s.string());
135
136    CameraParameters params(s);
137    params.getPreviewSize(&mWidth, &mHeight);
138}
139
140CameraSource::~CameraSource() {
141    if (mStarted) {
142        stop();
143    }
144}
145
146status_t CameraSource::start(MetaData *) {
147    CHECK(!mStarted);
148
149    mCamera->setListener(new CameraSourceListener(this));
150
151    sp<ISurface> dummy = new DummySurface;
152    status_t err = mCamera->setPreviewDisplay(dummy);
153    CHECK_EQ(err, OK);
154
155    mCamera->setPreviewCallbackFlags(
156            FRAME_CALLBACK_FLAG_ENABLE_MASK
157            | FRAME_CALLBACK_FLAG_COPY_OUT_MASK);
158
159    err = mCamera->startPreview();
160    CHECK_EQ(err, OK);
161
162    mStarted = true;
163
164    return OK;
165}
166
167status_t CameraSource::stop() {
168    CHECK(mStarted);
169
170    mCamera->stopPreview();
171
172    mStarted = false;
173
174    return OK;
175}
176
177sp<MetaData> CameraSource::getFormat() {
178    sp<MetaData> meta = new MetaData;
179    meta->setCString(kKeyMIMEType, MEDIA_MIMETYPE_VIDEO_RAW);
180    meta->setInt32(kKeyColorFormat, OMX_COLOR_FormatYUV420SemiPlanar);
181    meta->setInt32(kKeyWidth, mWidth);
182    meta->setInt32(kKeyHeight, mHeight);
183
184    return meta;
185}
186
187status_t CameraSource::read(
188        MediaBuffer **buffer, const ReadOptions *options) {
189    CHECK(mStarted);
190
191    *buffer = NULL;
192
193    int64_t seekTimeUs;
194    if (options && options->getSeekTo(&seekTimeUs)) {
195        return ERROR_UNSUPPORTED;
196    }
197
198    sp<IMemory> frame;
199    int64_t frameTime;
200
201    {
202        Mutex::Autolock autoLock(mLock);
203        while (mFrames.empty()) {
204            mFrameAvailableCondition.wait(mLock);
205        }
206
207        frame = *mFrames.begin();
208        mFrames.erase(mFrames.begin());
209
210        frameTime = *mFrameTimes.begin();
211        mFrameTimes.erase(mFrameTimes.begin());
212    }
213
214    *buffer = new MediaBuffer(frame->size());
215    memcpy((*buffer)->data(), frame->pointer(), frame->size());
216    (*buffer)->set_range(0, frame->size());
217
218    (*buffer)->meta_data()->clear();
219    (*buffer)->meta_data()->setInt64(kKeyTime, frameTime);
220
221    return OK;
222}
223
224void CameraSource::dataCallback(int32_t msgType, const sp<IMemory> &data) {
225    Mutex::Autolock autoLock(mLock);
226
227    int64_t nowUs = getNowUs();
228    if (mNumFrames == 0) {
229        mFirstFrameTimeUs = nowUs;
230    }
231    ++mNumFrames;
232
233    mFrames.push_back(data);
234    mFrameTimes.push_back(nowUs - mFirstFrameTimeUs);
235    mFrameAvailableCondition.signal();
236}
237
238}  // namespace android
239