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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 "Camera2-FrameProcessor"
#define ATRACE_TAG ATRACE_TAG_CAMERA
//#define LOG_NDEBUG 0
#include <utils/Log.h>
#include <utils/Trace.h>
#include "FrameProcessor.h"
#include "../CameraDeviceBase.h"
#include "../Camera2Client.h"
namespace android {
namespace camera2 {
FrameProcessor::FrameProcessor(wp<CameraDeviceBase> device,
wp<Camera2Client> client) :
ProFrameProcessor(device),
mClient(client),
mLastFrameNumberOfFaces(0) {
}
FrameProcessor::~FrameProcessor() {
}
bool FrameProcessor::processSingleFrame(CameraMetadata &frame,
const sp<CameraDeviceBase> &device) {
sp<Camera2Client> client = mClient.promote();
if (!client.get()) {
return false;
}
if (processFaceDetect(frame, client) != OK) {
return false;
}
if (!ProFrameProcessor::processSingleFrame(frame, device)) {
return false;
}
return true;
}
status_t FrameProcessor::processFaceDetect(const CameraMetadata &frame,
const sp<Camera2Client> &client) {
status_t res = BAD_VALUE;
ATRACE_CALL();
camera_metadata_ro_entry_t entry;
bool enableFaceDetect;
{
SharedParameters::Lock l(client->getParameters());
enableFaceDetect = l.mParameters.enableFaceDetect;
}
entry = frame.find(ANDROID_STATISTICS_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_STATISTICS_FACE_DETECT_MODE_OFF) {
SharedParameters::Lock l(client->getParameters());
entry = frame.find(ANDROID_STATISTICS_FACE_RECTANGLES);
if (entry.count == 0) {
// No faces this frame
/* warning: locks SharedCameraCallbacks */
callbackFaceDetection(client, metadata);
return OK;
}
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_STATISTICS_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_STATISTICS_FACE_DETECT_MODE_FULL) {
entry = frame.find(ANDROID_STATISTICS_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_STATISTICS_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);
size_t maxFaces = metadata.number_of_faces;
for (size_t i = 0; i < maxFaces; i++) {
if (faceScores[i] == 0) {
metadata.number_of_faces--;
continue;
}
if (faceScores[i] > 100) {
ALOGW("%s: Face index %d with out of range score %d",
__FUNCTION__, i, faceScores[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_STATISTICS_FACE_DETECT_MODE_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();
}
/* warning: locks SharedCameraCallbacks */
callbackFaceDetection(client, metadata);
return OK;
}
void FrameProcessor::callbackFaceDetection(sp<Camera2Client> client,
const camera_frame_metadata &metadata) {
camera_frame_metadata *metadata_ptr =
const_cast<camera_frame_metadata*>(&metadata);
/**
* Filter out repeated 0-face callbacks,
* but not when the last frame was >0
*/
if (metadata.number_of_faces != 0 ||
mLastFrameNumberOfFaces != metadata.number_of_faces) {
Camera2Client::SharedCameraCallbacks::Lock
l(client->mSharedCameraCallbacks);
if (l.mRemoteCallback != NULL) {
l.mRemoteCallback->dataCallback(CAMERA_MSG_PREVIEW_METADATA,
NULL,
metadata_ptr);
}
}
mLastFrameNumberOfFaces = metadata.number_of_faces;
}
}; // namespace camera2
}; // namespace android
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