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/*
* Copyright (C) 2012 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_TAG "Camera2Client::FrameProcessor"
#define ATRACE_TAG ATRACE_TAG_CAMERA
//#define LOG_NDEBUG 0
#include <utils/Log.h>
#include <utils/Trace.h>
#include "FrameProcessor.h"
#include "../Camera2Device.h"
#include "../Camera2Client.h"
namespace android {
namespace camera2 {
FrameProcessor::FrameProcessor(wp<Camera2Client> client):
Thread(false), mClient(client) {
}
FrameProcessor::~FrameProcessor() {
ALOGV("%s: Exit", __FUNCTION__);
}
void FrameProcessor::dump(int fd, const Vector<String16>& args) {
String8 result(" Latest received frame:\n");
write(fd, result.string(), result.size());
mLastFrame.dump(fd, 2, 6);
}
bool FrameProcessor::threadLoop() {
status_t res;
sp<Camera2Device> device;
{
sp<Camera2Client> client = mClient.promote();
if (client == 0) return false;
device = client->getCameraDevice();
}
res = device->waitForNextFrame(kWaitDuration);
if (res == OK) {
sp<Camera2Client> client = mClient.promote();
if (client == 0) return false;
processNewFrames(client);
} else if (res != TIMED_OUT) {
ALOGE("Camera2Client::FrameProcessor: Error waiting for new "
"frames: %s (%d)", strerror(-res), res);
}
return true;
}
void FrameProcessor::processNewFrames(sp<Camera2Client> &client) {
status_t res;
CameraMetadata frame;
while ( (res = client->getCameraDevice()->getNextFrame(&frame)) == OK) {
camera_metadata_entry_t entry;
entry = frame.find(ANDROID_REQUEST_FRAME_COUNT);
if (entry.count == 0) {
ALOGE("%s: Camera %d: Error reading frame number: %s (%d)",
__FUNCTION__, client->getCameraId(), strerror(-res), res);
break;
}
res = processFaceDetect(frame, client);
if (res != OK) break;
mLastFrame.acquire(frame);
}
if (res != NOT_ENOUGH_DATA) {
ALOGE("%s: Camera %d: Error getting next frame: %s (%d)",
__FUNCTION__, client->getCameraId(), strerror(-res), res);
return;
}
return;
}
status_t FrameProcessor::processFaceDetect(
const CameraMetadata &frame, sp<Camera2Client> &client) {
status_t res;
camera_metadata_ro_entry_t entry;
bool enableFaceDetect;
int maxFaces;
{
SharedParameters::Lock l(client->getParameters());
enableFaceDetect = l.mParameters.enableFaceDetect;
}
entry = frame.find(ANDROID_STATS_FACE_DETECT_MODE);
// TODO: This should be an error once implementations are compliant
if (entry.count == 0) {
return OK;
}
uint8_t faceDetectMode = entry.data.u8[0];
camera_frame_metadata metadata;
Vector<camera_face_t> faces;
metadata.number_of_faces = 0;
if (enableFaceDetect && faceDetectMode != ANDROID_STATS_FACE_DETECTION_OFF) {
SharedParameters::Lock l(client->getParameters());
entry = frame.find(ANDROID_STATS_FACE_RECTANGLES);
if (entry.count == 0) {
ALOGE("%s: Camera %d: Unable to read face rectangles",
__FUNCTION__, client->getCameraId());
return res;
}
metadata.number_of_faces = entry.count / 4;
if (metadata.number_of_faces >
l.mParameters.fastInfo.maxFaces) {
ALOGE("%s: Camera %d: More faces than expected! (Got %d, max %d)",
__FUNCTION__, client->getCameraId(),
metadata.number_of_faces, l.mParameters.fastInfo.maxFaces);
return res;
}
const int32_t *faceRects = entry.data.i32;
entry = frame.find(ANDROID_STATS_FACE_SCORES);
if (entry.count == 0) {
ALOGE("%s: Camera %d: Unable to read face scores",
__FUNCTION__, client->getCameraId());
return res;
}
const uint8_t *faceScores = entry.data.u8;
const int32_t *faceLandmarks = NULL;
const int32_t *faceIds = NULL;
if (faceDetectMode == ANDROID_STATS_FACE_DETECTION_FULL) {
entry = frame.find(ANDROID_STATS_FACE_LANDMARKS);
if (entry.count == 0) {
ALOGE("%s: Camera %d: Unable to read face landmarks",
__FUNCTION__, client->getCameraId());
return res;
}
faceLandmarks = entry.data.i32;
entry = frame.find(ANDROID_STATS_FACE_IDS);
if (entry.count == 0) {
ALOGE("%s: Camera %d: Unable to read face IDs",
__FUNCTION__, client->getCameraId());
return res;
}
faceIds = entry.data.i32;
}
faces.setCapacity(metadata.number_of_faces);
for (int i = 0; i < metadata.number_of_faces; i++) {
camera_face_t face;
face.rect[0] = l.mParameters.arrayXToNormalized(faceRects[i*4 + 0]);
face.rect[1] = l.mParameters.arrayYToNormalized(faceRects[i*4 + 1]);
face.rect[2] = l.mParameters.arrayXToNormalized(faceRects[i*4 + 2]);
face.rect[3] = l.mParameters.arrayYToNormalized(faceRects[i*4 + 3]);
face.score = faceScores[i];
if (faceDetectMode == ANDROID_STATS_FACE_DETECTION_FULL) {
face.id = faceIds[i];
face.left_eye[0] =
l.mParameters.arrayXToNormalized(faceLandmarks[i*6 + 0]);
face.left_eye[1] =
l.mParameters.arrayYToNormalized(faceLandmarks[i*6 + 1]);
face.right_eye[0] =
l.mParameters.arrayXToNormalized(faceLandmarks[i*6 + 2]);
face.right_eye[1] =
l.mParameters.arrayYToNormalized(faceLandmarks[i*6 + 3]);
face.mouth[0] =
l.mParameters.arrayXToNormalized(faceLandmarks[i*6 + 4]);
face.mouth[1] =
l.mParameters.arrayYToNormalized(faceLandmarks[i*6 + 5]);
} else {
face.id = 0;
face.left_eye[0] = face.left_eye[1] = -2000;
face.right_eye[0] = face.right_eye[1] = -2000;
face.mouth[0] = face.mouth[1] = -2000;
}
faces.push_back(face);
}
metadata.faces = faces.editArray();
}
if (metadata.number_of_faces != 0) {
Camera2Client::SharedCameraClient::Lock l(client->mSharedCameraClient);
if (l.mCameraClient != NULL) {
l.mCameraClient->dataCallback(CAMERA_MSG_PREVIEW_METADATA,
NULL, &metadata);
}
}
return OK;
}
}; // namespace camera2
}; // namespace android
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