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      1 /*
      2  * Copyright (C) 2016 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 //#define LOG_NDEBUG 0
     18 #define LOG_TAG "ACameraCaptureSession"
     19 
     20 #include "ACameraCaptureSession.h"
     21 
     22 using namespace android;
     23 
     24 ACameraCaptureSession::~ACameraCaptureSession() {
     25     ALOGV("~ACameraCaptureSession: %p notify device end of life", this);
     26     sp<CameraDevice> dev = getDeviceSp();
     27     if (dev != nullptr && !dev->isClosed()) {
     28         dev->lockDeviceForSessionOps();
     29         {
     30             Mutex::Autolock _l(mSessionLock);
     31             dev->notifySessionEndOfLifeLocked(this);
     32         }
     33         dev->unlockDevice();
     34     }
     35     // Fire onClosed callback
     36     (*mUserSessionCallback.onClosed)(mUserSessionCallback.context, this);
     37     ALOGV("~ACameraCaptureSession: %p is deleted", this);
     38 }
     39 
     40 void
     41 ACameraCaptureSession::closeByApp() {
     42     {
     43         Mutex::Autolock _l(mSessionLock);
     44         if (mClosedByApp) {
     45             // Do not close twice
     46             return;
     47         }
     48         mClosedByApp = true;
     49     }
     50 
     51     sp<CameraDevice> dev = getDeviceSp();
     52     if (dev != nullptr) {
     53         dev->lockDeviceForSessionOps();
     54     }
     55 
     56     {
     57         Mutex::Autolock _l(mSessionLock);
     58 
     59         if (!mIsClosed && dev != nullptr) {
     60             camera_status_t ret = dev->stopRepeatingLocked();
     61             if (ret != ACAMERA_OK) {
     62                 ALOGE("Stop repeating request failed while closing session %p", this);
     63             }
     64         }
     65         mIsClosed = true;
     66     }
     67 
     68     if (dev != nullptr) {
     69         dev->unlockDevice();
     70     }
     71     this->decStrong((void*) ACameraDevice_createCaptureSession);
     72 }
     73 
     74 camera_status_t
     75 ACameraCaptureSession::stopRepeating() {
     76     sp<CameraDevice> dev = getDeviceSp();
     77     if (dev == nullptr) {
     78         ALOGE("Error: Device associated with session %p has been closed!", this);
     79         return ACAMERA_ERROR_SESSION_CLOSED;
     80     }
     81 
     82     camera_status_t ret;
     83     dev->lockDeviceForSessionOps();
     84     {
     85         Mutex::Autolock _l(mSessionLock);
     86         ret = dev->stopRepeatingLocked();
     87     }
     88     dev->unlockDevice();
     89     return ret;
     90 }
     91 
     92 camera_status_t
     93 ACameraCaptureSession::abortCaptures() {
     94     sp<CameraDevice> dev = getDeviceSp();
     95     if (dev == nullptr) {
     96         ALOGE("Error: Device associated with session %p has been closed!", this);
     97         return ACAMERA_ERROR_SESSION_CLOSED;
     98     }
     99 
    100     camera_status_t ret;
    101     dev->lockDeviceForSessionOps();
    102     {
    103         Mutex::Autolock _l(mSessionLock);
    104         ret = dev->flushLocked(this);
    105     }
    106     dev->unlockDevice();
    107     return ret;
    108 }
    109 
    110 camera_status_t
    111 ACameraCaptureSession::setRepeatingRequest(
    112         /*optional*/ACameraCaptureSession_captureCallbacks* cbs,
    113         int numRequests, ACaptureRequest** requests,
    114         /*optional*/int* captureSequenceId) {
    115     sp<CameraDevice> dev = getDeviceSp();
    116     if (dev == nullptr) {
    117         ALOGE("Error: Device associated with session %p has been closed!", this);
    118         return ACAMERA_ERROR_SESSION_CLOSED;
    119     }
    120 
    121     camera_status_t ret;
    122     dev->lockDeviceForSessionOps();
    123     {
    124         Mutex::Autolock _l(mSessionLock);
    125         ret = dev->setRepeatingRequestsLocked(
    126                 this, cbs, numRequests, requests, captureSequenceId);
    127     }
    128     dev->unlockDevice();
    129     return ret;
    130 }
    131 
    132 camera_status_t ACameraCaptureSession::capture(
    133         /*optional*/ACameraCaptureSession_captureCallbacks* cbs,
    134         int numRequests, ACaptureRequest** requests,
    135         /*optional*/int* captureSequenceId) {
    136     sp<CameraDevice> dev = getDeviceSp();
    137     if (dev == nullptr) {
    138         ALOGE("Error: Device associated with session %p has been closed!", this);
    139         return ACAMERA_ERROR_SESSION_CLOSED;
    140     }
    141     camera_status_t ret;
    142     dev->lockDeviceForSessionOps();
    143     {
    144         Mutex::Autolock _l(mSessionLock);
    145         ret = dev->captureLocked(this, cbs, numRequests, requests, captureSequenceId);
    146     }
    147     dev->unlockDevice();
    148     return ret;
    149 }
    150 
    151 ACameraDevice*
    152 ACameraCaptureSession::getDevice() {
    153     Mutex::Autolock _l(mSessionLock);
    154     sp<CameraDevice> dev = getDeviceSp();
    155     if (dev == nullptr) {
    156         ALOGE("Error: Device associated with session %p has been closed!", this);
    157         return nullptr;
    158     }
    159     return dev->getWrapper();
    160 }
    161 
    162 void
    163 ACameraCaptureSession::closeByDevice() {
    164     Mutex::Autolock _l(mSessionLock);
    165     mIsClosed = true;
    166 }
    167 
    168 sp<CameraDevice>
    169 ACameraCaptureSession::getDeviceSp() {
    170     sp<CameraDevice> device = mDevice.promote();
    171     if (device == nullptr || device->isClosed()) {
    172         ALOGW("Device is closed but session %d is not notified", mId);
    173         return nullptr;
    174     }
    175     return device;
    176 }
    177 
    178 
    179