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/*
* 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/foundation/ADebug.h>
#include <media/stagefright/CameraSource.h>
#include <media/stagefright/CameraSourceTimeLapse.h>
#include <media/stagefright/MetaData.h>
#include <camera/Camera.h>
#include <camera/CameraParameters.h>
#include <utils/String8.h>
#include <utils/Vector.h>
namespace android {
// static
CameraSourceTimeLapse *CameraSourceTimeLapse::CreateFromCamera(
const sp<ICamera> &camera,
const sp<ICameraRecordingProxy> &proxy,
int32_t cameraId,
Size videoSize,
int32_t videoFrameRate,
const sp<Surface>& surface,
int64_t timeBetweenFrameCaptureUs) {
CameraSourceTimeLapse *source = new
CameraSourceTimeLapse(camera, proxy, cameraId,
videoSize, videoFrameRate, surface,
timeBetweenFrameCaptureUs);
if (source != NULL) {
if (source->initCheck() != OK) {
delete source;
return NULL;
}
}
return source;
}
CameraSourceTimeLapse::CameraSourceTimeLapse(
const sp<ICamera>& camera,
const sp<ICameraRecordingProxy>& proxy,
int32_t cameraId,
Size videoSize,
int32_t videoFrameRate,
const sp<Surface>& surface,
int64_t timeBetweenFrameCaptureUs)
: CameraSource(camera, proxy, cameraId, videoSize, videoFrameRate, surface, true),
mTimeBetweenTimeLapseVideoFramesUs(1E6/videoFrameRate),
mLastTimeLapseFrameRealTimestampUs(0),
mSkipCurrentFrame(false) {
mTimeBetweenFrameCaptureUs = timeBetweenFrameCaptureUs;
ALOGD("starting time lapse mode: %lld us",
mTimeBetweenFrameCaptureUs);
mVideoWidth = videoSize.width;
mVideoHeight = videoSize.height;
if (!trySettingVideoSize(videoSize.width, videoSize.height)) {
mInitCheck = NO_INIT;
}
// Initialize quick stop variables.
mQuickStop = false;
mForceRead = false;
mLastReadBufferCopy = NULL;
mStopWaitingForIdleCamera = false;
}
CameraSourceTimeLapse::~CameraSourceTimeLapse() {
if (mLastReadBufferCopy) {
mLastReadBufferCopy->release();
mLastReadBufferCopy = NULL;
}
}
void CameraSourceTimeLapse::startQuickReadReturns() {
ALOGV("startQuickReadReturns");
Mutex::Autolock autoLock(mQuickStopLock);
// Enable quick stop mode.
mQuickStop = true;
// Force dataCallbackTimestamp() coming from the video camera to
// not skip the next frame as we want read() to get a get a frame
// right away.
mForceRead = true;
}
bool CameraSourceTimeLapse::trySettingVideoSize(
int32_t width, int32_t height) {
ALOGV("trySettingVideoSize");
int64_t token = IPCThreadState::self()->clearCallingIdentity();
String8 s = mCamera->getParameters();
CameraParameters params(s);
Vector<Size> supportedSizes;
params.getSupportedVideoSizes(supportedSizes);
bool videoOutputSupported = false;
if (supportedSizes.size() == 0) {
params.getSupportedPreviewSizes(supportedSizes);
} else {
videoOutputSupported = true;
}
bool videoSizeSupported = false;
for (uint32_t i = 0; i < supportedSizes.size(); ++i) {
int32_t pictureWidth = supportedSizes[i].width;
int32_t pictureHeight = supportedSizes[i].height;
if ((pictureWidth == width) && (pictureHeight == height)) {
videoSizeSupported = true;
}
}
bool isSuccessful = false;
if (videoSizeSupported) {
ALOGV("Video size (%d, %d) is supported", width, height);
if (videoOutputSupported) {
params.setVideoSize(width, height);
} else {
params.setPreviewSize(width, height);
}
if (mCamera->setParameters(params.flatten()) == OK) {
isSuccessful = true;
} else {
ALOGE("Failed to set preview size to %dx%d", width, height);
isSuccessful = false;
}
}
IPCThreadState::self()->restoreCallingIdentity(token);
return isSuccessful;
}
void CameraSourceTimeLapse::signalBufferReturned(MediaBuffer* buffer) {
ALOGV("signalBufferReturned");
Mutex::Autolock autoLock(mQuickStopLock);
if (mQuickStop && (buffer == mLastReadBufferCopy)) {
buffer->setObserver(NULL);
buffer->release();
} else {
return CameraSource::signalBufferReturned(buffer);
}
}
void createMediaBufferCopy(
const MediaBuffer& sourceBuffer,
int64_t frameTime,
MediaBuffer **newBuffer) {
ALOGV("createMediaBufferCopy");
size_t sourceSize = sourceBuffer.size();
void* sourcePointer = sourceBuffer.data();
(*newBuffer) = new MediaBuffer(sourceSize);
memcpy((*newBuffer)->data(), sourcePointer, sourceSize);
(*newBuffer)->meta_data()->setInt64(kKeyTime, frameTime);
}
void CameraSourceTimeLapse::fillLastReadBufferCopy(MediaBuffer& sourceBuffer) {
ALOGV("fillLastReadBufferCopy");
int64_t frameTime;
CHECK(sourceBuffer.meta_data()->findInt64(kKeyTime, &frameTime));
createMediaBufferCopy(sourceBuffer, frameTime, &mLastReadBufferCopy);
mLastReadBufferCopy->add_ref();
mLastReadBufferCopy->setObserver(this);
}
status_t CameraSourceTimeLapse::read(
MediaBuffer **buffer, const ReadOptions *options) {
ALOGV("read");
if (mLastReadBufferCopy == NULL) {
mLastReadStatus = CameraSource::read(buffer, options);
// mQuickStop may have turned to true while read was blocked.
// Make a copy of the buffer in that case.
Mutex::Autolock autoLock(mQuickStopLock);
if (mQuickStop && *buffer) {
fillLastReadBufferCopy(**buffer);
}
return mLastReadStatus;
} else {
(*buffer) = mLastReadBufferCopy;
(*buffer)->add_ref();
return mLastReadStatus;
}
}
sp<IMemory> CameraSourceTimeLapse::createIMemoryCopy(
const sp<IMemory> &source_data) {
ALOGV("createIMemoryCopy");
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;
}
bool CameraSourceTimeLapse::skipCurrentFrame(int64_t timestampUs) {
ALOGV("skipCurrentFrame");
if (mSkipCurrentFrame) {
mSkipCurrentFrame = false;
return true;
} else {
return false;
}
}
bool CameraSourceTimeLapse::skipFrameAndModifyTimeStamp(int64_t *timestampUs) {
ALOGV("skipFrameAndModifyTimeStamp");
if (mLastTimeLapseFrameRealTimestampUs == 0) {
// First time lapse frame. Initialize mLastTimeLapseFrameRealTimestampUs
// to current time (timestampUs) and save frame data.
ALOGV("dataCallbackTimestamp timelapse: initial frame");
mLastTimeLapseFrameRealTimestampUs = *timestampUs;
return false;
}
{
Mutex::Autolock autoLock(mQuickStopLock);
// mForceRead may be set to true by startQuickReadReturns(). In that
// case don't skip this frame.
if (mForceRead) {
ALOGV("dataCallbackTimestamp timelapse: forced read");
mForceRead = false;
*timestampUs =
mLastFrameTimestampUs + mTimeBetweenTimeLapseVideoFramesUs;
// Really make sure that this video recording frame will not be dropped.
if (*timestampUs < mStartTimeUs) {
ALOGI("set timestampUs to start time stamp %lld us", mStartTimeUs);
*timestampUs = mStartTimeUs;
}
return false;
}
}
// Workaround to bypass the first 2 input frames for skipping.
// The first 2 output frames from the encoder are: decoder specific info and
// the compressed video frame data for the first input video frame.
if (mNumFramesEncoded >= 1 && *timestampUs <
(mLastTimeLapseFrameRealTimestampUs + mTimeBetweenFrameCaptureUs)) {
// Skip all frames from last encoded frame until
// sufficient time (mTimeBetweenFrameCaptureUs) has passed.
// Tell the camera to release its recording frame and return.
ALOGV("dataCallbackTimestamp timelapse: skipping intermediate frame");
return true;
} else {
// Desired frame has arrived after mTimeBetweenFrameCaptureUs 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.
ALOGV("dataCallbackTimestamp timelapse: got timelapse frame");
mLastTimeLapseFrameRealTimestampUs = *timestampUs;
*timestampUs = mLastFrameTimestampUs + mTimeBetweenTimeLapseVideoFramesUs;
return false;
}
return false;
}
void CameraSourceTimeLapse::dataCallbackTimestamp(int64_t timestampUs, int32_t msgType,
const sp<IMemory> &data) {
ALOGV("dataCallbackTimestamp");
mSkipCurrentFrame = skipFrameAndModifyTimeStamp(&timestampUs);
CameraSource::dataCallbackTimestamp(timestampUs, msgType, data);
}
} // namespace android