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Diffstat (limited to 'media/libstagefright/CameraSourceTimeLapse.cpp')
| -rw-r--r-- | media/libstagefright/CameraSourceTimeLapse.cpp | 223 |
1 files changed, 223 insertions, 0 deletions
diff --git a/media/libstagefright/CameraSourceTimeLapse.cpp b/media/libstagefright/CameraSourceTimeLapse.cpp new file mode 100644 index 0000000..0c7ffa3 --- /dev/null +++ b/media/libstagefright/CameraSourceTimeLapse.cpp @@ -0,0 +1,223 @@ +/* + * Copyright (C) 2010 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +//#define LOG_NDEBUG 0 +#define LOG_TAG "CameraSourceTimeLapse" + +#include <binder/IPCThreadState.h> +#include <binder/MemoryBase.h> +#include <binder/MemoryHeapBase.h> +#include <media/stagefright/CameraSource.h> +#include <media/stagefright/CameraSourceTimeLapse.h> +#include <media/stagefright/MediaDebug.h> +#include <media/stagefright/MetaData.h> +#include <camera/Camera.h> +#include <camera/CameraParameters.h> +#include <utils/String8.h> + +namespace android { + +// static +CameraSourceTimeLapse *CameraSourceTimeLapse::Create(bool useStillCameraForTimeLapse, + int64_t timeBetweenTimeLapseFrameCaptureUs, + int32_t videoFrameRate) { + sp<Camera> camera = Camera::connect(0); + + if (camera.get() == NULL) { + return NULL; + } + + return new CameraSourceTimeLapse(camera, useStillCameraForTimeLapse, + timeBetweenTimeLapseFrameCaptureUs, videoFrameRate); +} + +// static +CameraSourceTimeLapse *CameraSourceTimeLapse::CreateFromCamera(const sp<Camera> &camera, + bool useStillCameraForTimeLapse, + int64_t timeBetweenTimeLapseFrameCaptureUs, + int32_t videoFrameRate) { + if (camera.get() == NULL) { + return NULL; + } + + return new CameraSourceTimeLapse(camera, useStillCameraForTimeLapse, + timeBetweenTimeLapseFrameCaptureUs, videoFrameRate); +} + +CameraSourceTimeLapse::CameraSourceTimeLapse(const sp<Camera> &camera, + bool useStillCameraForTimeLapse, + int64_t timeBetweenTimeLapseFrameCaptureUs, + int32_t videoFrameRate) + : CameraSource(camera), + mUseStillCameraForTimeLapse(useStillCameraForTimeLapse), + mTimeBetweenTimeLapseFrameCaptureUs(timeBetweenTimeLapseFrameCaptureUs), + mTimeBetweenTimeLapseVideoFramesUs(1E6/videoFrameRate), + mLastTimeLapseFrameRealTimestampUs(0), + mSkipCurrentFrame(false) { + + LOGV("starting time lapse mode"); + if(mUseStillCameraForTimeLapse) { + // Currently hardcoded the picture size. Will need to choose + // automatically or pass in from the app. + int32_t width, height; + width = 1024; + height = 768; + mMeta->setInt32(kKeyWidth, width); + mMeta->setInt32(kKeyHeight, height); + } +} + +CameraSourceTimeLapse::~CameraSourceTimeLapse() { +} + +// static +void *CameraSourceTimeLapse::ThreadTimeLapseWrapper(void *me) { + CameraSourceTimeLapse *source = static_cast<CameraSourceTimeLapse *>(me); + source->threadTimeLapseEntry(); + return NULL; +} + +void CameraSourceTimeLapse::threadTimeLapseEntry() { + while(mStarted) { + LOGV("threadTimeLapseEntry loop"); + sleep(mTimeBetweenTimeLapseFrameCaptureUs/1E6); + CHECK_EQ(OK, mCamera->takePicture()); + } +} + +void CameraSourceTimeLapse::startCameraRecording() { + if(mUseStillCameraForTimeLapse) { + LOGV("start time lapse recording using still camera"); + + int32_t width; + int32_t height; + mMeta->findInt32(kKeyWidth, &width); + mMeta->findInt32(kKeyHeight, &height); + + int64_t token = IPCThreadState::self()->clearCallingIdentity(); + String8 s = mCamera->getParameters(); + IPCThreadState::self()->restoreCallingIdentity(token); + + CameraParameters params(s); + + params.setPictureSize(width, height); + mCamera->setParameters(params.flatten()); + + CHECK_EQ(OK, mCamera->takePicture()); + + // create a thread which takes pictures in a loop + pthread_attr_t attr; + pthread_attr_init(&attr); + pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE); + + pthread_create(&mThreadTimeLapse, &attr, ThreadTimeLapseWrapper, this); + pthread_attr_destroy(&attr); + } else { + LOGV("start time lapse recording using video camera"); + CHECK_EQ(OK, mCamera->startRecording()); + } +} + +void CameraSourceTimeLapse::stopCameraRecording() { + if(mUseStillCameraForTimeLapse) { + void *dummy; + pthread_join(mThreadTimeLapse, &dummy); + } else { + mCamera->stopRecording(); + } +} + +void CameraSourceTimeLapse::releaseRecordingFrame(const sp<IMemory>& frame) { + if(!mUseStillCameraForTimeLapse) { + mCamera->releaseRecordingFrame(frame); + } +} + +sp<IMemory> CameraSourceTimeLapse::createIMemoryCopy(const sp<IMemory> &source_data) { + size_t source_size = source_data->size(); + void* source_pointer = source_data->pointer(); + + sp<MemoryHeapBase> newMemoryHeap = new MemoryHeapBase(source_size); + sp<MemoryBase> newMemory = new MemoryBase(newMemoryHeap, 0, source_size); + memcpy(newMemory->pointer(), source_pointer, source_size); + return newMemory; +} + +void CameraSourceTimeLapse::dataCallback(int32_t msgType, const sp<IMemory> &data) { + if(msgType != CAMERA_MSG_RAW_IMAGE) { + return; + } + + LOGV("dataCallback for timelapse still frame"); + CHECK_EQ(true, mUseStillCameraForTimeLapse); + + int64_t timestampUs; + if (mNumFramesReceived == 0) { + timestampUs = mStartTimeUs; + } else { + timestampUs = mLastFrameTimestampUs + mTimeBetweenTimeLapseVideoFramesUs; + } + sp<IMemory> dataCopy = createIMemoryCopy(data); + dataCallbackTimestamp(timestampUs, msgType, dataCopy); +} + +bool CameraSourceTimeLapse::skipCurrentFrame(int64_t timestampUs) { + if(mSkipCurrentFrame) { + mSkipCurrentFrame = false; + return true; + } else { + return false; + } +} + +bool CameraSourceTimeLapse::skipFrameAndModifyTimeStamp(int64_t *timestampUs) { + if(!mUseStillCameraForTimeLapse) { + if(mLastTimeLapseFrameRealTimestampUs == 0) { + // First time lapse frame. Initialize mLastTimeLapseFrameRealTimestampUs + // to current time (timestampUs) and save frame data. + LOGV("dataCallbackTimestamp timelapse: initial frame"); + + mLastTimeLapseFrameRealTimestampUs = *timestampUs; + } else if (*timestampUs < + (mLastTimeLapseFrameRealTimestampUs + mTimeBetweenTimeLapseFrameCaptureUs)) { + // Skip all frames from last encoded frame until + // sufficient time (mTimeBetweenTimeLapseFrameCaptureUs) has passed. + // Tell the camera to release its recording frame and return. + LOGV("dataCallbackTimestamp timelapse: skipping intermediate frame"); + return true; + } else { + // Desired frame has arrived after mTimeBetweenTimeLapseFrameCaptureUs time: + // - Reset mLastTimeLapseFrameRealTimestampUs to current time. + // - Artificially modify timestampUs to be one frame time (1/framerate) ahead + // of the last encoded frame's time stamp. + LOGV("dataCallbackTimestamp timelapse: got timelapse frame"); + + mLastTimeLapseFrameRealTimestampUs = *timestampUs; + *timestampUs = mLastFrameTimestampUs + mTimeBetweenTimeLapseVideoFramesUs; + } + } + return false; +} + +void CameraSourceTimeLapse::dataCallbackTimestamp(int64_t timestampUs, int32_t msgType, + const sp<IMemory> &data) { + if(!mUseStillCameraForTimeLapse) { + mSkipCurrentFrame = skipFrameAndModifyTimeStamp(×tampUs); + } + CameraSource::dataCallbackTimestamp(timestampUs, msgType, data); +} + +} // namespace android |