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</pre></td>
<td class='lines'><pre><code><span class="hl com">/* SPDX-License-Identifier: LGPL-2.1-or-later */</span>
<span class="hl com">/*</span>
<span class="hl com"> * Copyright (C) 2019, Google Inc.</span>
<span class="hl com"> *</span>
<span class="hl com"> * camera_hal_manager.cpp - libcamera Android Camera Manager</span>
<span class="hl com"> */</span>
<span class="hl ppc">#include</span> <span class="hl pps">"camera_hal_manager.h"</span><span class="hl ppc"></span>
<span class="hl ppc">#include <libcamera/base/log.h></span>
<span class="hl ppc">#include <libcamera/camera.h></span>
<span class="hl ppc">#include <libcamera/property_ids.h></span>
<span class="hl ppc">#include</span> <span class="hl pps">"camera_device.h"</span><span class="hl ppc"></span>
<span class="hl kwa">using namespace</span> libcamera<span class="hl opt">;</span>
<span class="hl kwd">LOG_DECLARE_CATEGORY</span><span class="hl opt">(</span>HAL<span class="hl opt">)</span>
<span class="hl com">/*</span>
<span class="hl com"> * \class CameraHalManager</span>
<span class="hl com"> *</span>
<span class="hl com"> * The HAL camera manager is initializated at camera_module_t 'hal_init()' time</span>
<span class="hl com"> * and spawns its own thread where libcamera related events are dispatched to.</span>
<span class="hl com"> * It wraps the libcamera CameraManager operations and provides helpers for the</span>
<span class="hl com"> * camera_module_t operations, to retrieve the number of cameras in the system,</span>
<span class="hl com"> * their static information and to open camera devices.</span>
<span class="hl com"> */</span>
<span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span><span class="hl kwd">CameraHalManager</span><span class="hl opt">()</span>
<span class="hl opt">:</span> <span class="hl kwd">cameraManager_</span><span class="hl opt">(</span><span class="hl kwc">nullptr</span><span class="hl opt">),</span> <span class="hl kwd">callbacks_</span><span class="hl opt">(</span><span class="hl kwc">nullptr</span><span class="hl opt">),</span> <span class="hl kwd">numInternalCameras_</span><span class="hl opt">(</span><span class="hl num">0</span><span class="hl opt">),</span>
<span class="hl kwd">nextExternalCameraId_</span><span class="hl opt">(</span>firstExternalCameraId_<span class="hl opt">)</span>
<span class="hl opt">{</span>
<span class="hl opt">}</span>
<span class="hl com">/* CameraManager calls stop() in the destructor. */</span>
<span class="hl kwc">CameraHalManager</span><span class="hl opt">::~</span><span class="hl kwd">CameraHalManager</span><span class="hl opt">() =</span> <span class="hl kwa">default</span><span class="hl opt">;</span>
<span class="hl com">/* static */</span>
CameraHalManager <span class="hl opt">*</span><span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span><span class="hl kwd">instance</span><span class="hl opt">()</span>
<span class="hl opt">{</span>
<span class="hl kwb">static</span> CameraHalManager <span class="hl opt">*</span>cameraHalManager <span class="hl opt">=</span> <span class="hl kwa">new</span> CameraHalManager<span class="hl opt">;</span>
<span class="hl kwa">return</span> cameraHalManager<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">int</span> <span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span><span class="hl kwd">init</span><span class="hl opt">()</span>
<span class="hl opt">{</span>
cameraManager_ <span class="hl opt">=</span> <span class="hl kwc">std</span><span class="hl opt">::</span>make_unique<span class="hl opt"><</span>CameraManager<span class="hl opt">>();</span>
<span class="hl com">/*</span>
<span class="hl com"> * If the configuration file is not available the HAL only supports</span>
<span class="hl com"> * external cameras. If it exists but it's not valid then error out.</span>
<span class="hl com"> */</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>halConfig_<span class="hl opt">.</span><span class="hl kwd">exists</span><span class="hl opt">() && !</span>halConfig_<span class="hl opt">.</span><span class="hl kwd">isValid</span><span class="hl opt">()) {</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>HAL<span class="hl opt">,</span> Error<span class="hl opt">) <<</span> <span class="hl str">"HAL configuration file is not valid"</span><span class="hl opt">;</span>
<span class="hl kwa">return</span> <span class="hl opt">-</span>EINVAL<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl com">/* Support camera hotplug. */</span>
cameraManager_<span class="hl opt">-></span>cameraAdded<span class="hl opt">.</span><span class="hl kwd">connect</span><span class="hl opt">(</span><span class="hl kwa">this</span><span class="hl opt">, &</span><span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span>cameraAdded<span class="hl opt">);</span>
cameraManager_<span class="hl opt">-></span>cameraRemoved<span class="hl opt">.</span><span class="hl kwd">connect</span><span class="hl opt">(</span><span class="hl kwa">this</span><span class="hl opt">, &</span><span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span>cameraRemoved<span class="hl opt">);</span>
<span class="hl kwb">int</span> ret <span class="hl opt">=</span> cameraManager_<span class="hl opt">-></span><span class="hl kwd">start</span><span class="hl opt">();</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret<span class="hl opt">) {</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>HAL<span class="hl opt">,</span> Error<span class="hl opt">) <<</span> <span class="hl str">"Failed to start camera manager: "</span>
<span class="hl opt"><<</span> <span class="hl kwd">strerror</span><span class="hl opt">(-</span>ret<span class="hl opt">);</span>
cameraManager_<span class="hl opt">.</span><span class="hl kwd">reset</span><span class="hl opt">();</span>
<span class="hl kwa">return</span> ret<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwa">return</span> <span class="hl num">0</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>tuple<span class="hl opt"><</span>CameraDevice <span class="hl opt">*,</span> <span class="hl kwb">int</span><span class="hl opt">></span>
<span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span><span class="hl kwd">open</span><span class="hl opt">(</span><span class="hl kwb">unsigned int</span> id<span class="hl opt">,</span> <span class="hl kwb">const</span> hw_module_t <span class="hl opt">*</span>hardwareModule<span class="hl opt">)</span>
<span class="hl opt">{</span>
MutexLocker <span class="hl kwd">locker</span><span class="hl opt">(</span>mutex_<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>callbacks_<span class="hl opt">) {</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>HAL<span class="hl opt">,</span> Error<span class="hl opt">) <<</span> <span class="hl str">"Can't open camera before callbacks are set"</span><span class="hl opt">;</span>
<span class="hl kwa">return</span> <span class="hl opt">{</span> <span class="hl kwc">nullptr</span><span class="hl opt">, -</span>ENODEV <span class="hl opt">};</span>
<span class="hl opt">}</span>
CameraDevice <span class="hl opt">*</span>camera <span class="hl opt">=</span> <span class="hl kwd">cameraDeviceFromHalId</span><span class="hl opt">(</span>id<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>camera<span class="hl opt">) {</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>HAL<span class="hl opt">,</span> Error<span class="hl opt">) <<</span> <span class="hl str">"Invalid camera id '"</span> <span class="hl opt"><<</span> id <span class="hl opt"><<</span> <span class="hl str">"'"</span><span class="hl opt">;</span>
<span class="hl kwa">return</span> <span class="hl opt">{</span> <span class="hl kwc">nullptr</span><span class="hl opt">, -</span>ENODEV <span class="hl opt">};</span>
<span class="hl opt">}</span>
<span class="hl kwb">int</span> ret <span class="hl opt">=</span> camera<span class="hl opt">-></span><span class="hl kwd">open</span><span class="hl opt">(</span>hardwareModule<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret<span class="hl opt">)</span>
<span class="hl kwa">return</span> <span class="hl opt">{</span> <span class="hl kwc">nullptr</span><span class="hl opt">,</span> ret <span class="hl opt">};</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>HAL<span class="hl opt">,</span> Info<span class="hl opt">) <<</span> <span class="hl str">"Open camera '"</span> <span class="hl opt"><<</span> id <span class="hl opt"><<</span> <span class="hl str">"'"</span><span class="hl opt">;</span>
<span class="hl kwa">return</span> <span class="hl opt">{</span> camera<span class="hl opt">,</span> <span class="hl num">0</span> <span class="hl opt">};</span>
<span class="hl opt">}</span>
<span class="hl kwb">void</span> <span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span><span class="hl kwd">cameraAdded</span><span class="hl opt">(</span><span class="hl kwc">std</span><span class="hl opt">::</span>shared_ptr<span class="hl opt"><</span>Camera<span class="hl opt">></span> cam<span class="hl opt">)</span>
<span class="hl opt">{</span>
<span class="hl kwb">unsigned int</span> id<span class="hl opt">;</span>
<span class="hl kwb">bool</span> isCameraExternal <span class="hl opt">=</span> <span class="hl kwa">false</span><span class="hl opt">;</span>
<span class="hl kwb">bool</span> isCameraNew <span class="hl opt">=</span> <span class="hl kwa">false</span><span class="hl opt">;</span>
MutexLocker <span class="hl kwd">locker</span><span class="hl opt">(</span>mutex_<span class="hl opt">);</span>
<span class="hl com">/*</span>
<span class="hl com"> * Each camera is assigned a unique integer ID when it is seen for the</span>
<span class="hl com"> * first time. If the camera has been seen before, the previous ID is</span>
<span class="hl com"> * re-used.</span>
<span class="hl com"> *</span>
<span class="hl com"> * IDs starts from '0' for internal cameras and '1000' for external</span>
<span class="hl com"> * cameras.</span>
<span class="hl com"> */</span>
<span class="hl kwc">auto</span> iter <span class="hl opt">=</span> cameraIdsMap_<span class="hl opt">.</span><span class="hl kwd">find</span><span class="hl opt">(</span>cam<span class="hl opt">-></span><span class="hl kwd">id</span><span class="hl opt">());</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>iter <span class="hl opt">!=</span> cameraIdsMap_<span class="hl opt">.</span><span class="hl kwd">end</span><span class="hl opt">()) {</span>
id <span class="hl opt">=</span> iter<span class="hl opt">-></span>second<span class="hl opt">;</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>id <span class="hl opt">>=</span> firstExternalCameraId_<span class="hl opt">)</span>
isCameraExternal <span class="hl opt">=</span> <span class="hl kwa">true</span><span class="hl opt">;</span>
<span class="hl opt">}</span> <span class="hl kwa">else</span> <span class="hl opt">{</span>
isCameraNew <span class="hl opt">=</span> <span class="hl kwa">true</span><span class="hl opt">;</span>
<span class="hl com">/*</span>
<span class="hl com"> * Now check if this is an external camera and assign</span>
<span class="hl com"> * its id accordingly.</span>
<span class="hl com"> */</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span><span class="hl kwd">cameraLocation</span><span class="hl opt">(</span>cam<span class="hl opt">.</span><span class="hl kwd">get</span><span class="hl opt">()) ==</span> <span class="hl kwc">properties</span><span class="hl opt">::</span>CameraLocationExternal<span class="hl opt">) {</span>
isCameraExternal <span class="hl opt">=</span> <span class="hl kwa">true</span><span class="hl opt">;</span>
id <span class="hl opt">=</span> nextExternalCameraId_<span class="hl opt">;</span>
<span class="hl opt">}</span> <span class="hl kwa">else</span> <span class="hl opt">{</span>
id <span class="hl opt">=</span> numInternalCameras_<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
<span class="hl com">/*</span>
<span class="hl com"> * The configuration file must be valid, and contain a corresponding</span>
<span class="hl com"> * entry for internal cameras. External cameras can be initialized</span>
<span class="hl com"> * without configuration file.</span>
<span class="hl com"> */</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>isCameraExternal <span class="hl opt">&& !</span>halConfig_<span class="hl opt">.</span><span class="hl kwd">exists</span><span class="hl opt">()) {</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>HAL<span class="hl opt">,</span> Error<span class="hl opt">)</span>
<span class="hl opt"><<</span> <span class="hl str">"HAL configuration file is mandatory for internal cameras"</span><span class="hl opt">;</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">const</span> CameraConfigData <span class="hl opt">*</span>cameraConfigData <span class="hl opt">=</span> halConfig_<span class="hl opt">.</span><span class="hl kwd">cameraConfigData</span><span class="hl opt">(</span>cam<span class="hl opt">-></span><span class="hl kwd">id</span><span class="hl opt">());</span>
<span class="hl com">/*</span>
<span class="hl com"> * Some cameras whose location is reported by libcamera as external may</span>
<span class="hl com"> * actually be internal to the device. This is common with UVC cameras</span>
<span class="hl com"> * that are integrated in a laptop. In that case the real location</span>
<span class="hl com"> * should be specified in the configuration file.</span>
<span class="hl com"> *</span>
<span class="hl com"> * If the camera location is external and a configuration entry exists</span>
<span class="hl com"> * for it, override its location.</span>
<span class="hl com"> */</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>isCameraNew <span class="hl opt">&&</span> isCameraExternal<span class="hl opt">) {</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>cameraConfigData <span class="hl opt">&&</span> cameraConfigData<span class="hl opt">-></span>facing <span class="hl opt">!= -</span><span class="hl num">1</span><span class="hl opt">) {</span>
isCameraExternal <span class="hl opt">=</span> <span class="hl kwa">false</span><span class="hl opt">;</span>
id <span class="hl opt">=</span> numInternalCameras_<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>isCameraExternal <span class="hl opt">&& !</span>cameraConfigData<span class="hl opt">) {</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>HAL<span class="hl opt">,</span> Error<span class="hl opt">)</span>
<span class="hl opt"><<</span> <span class="hl str">"HAL configuration entry for internal camera "</span>
<span class="hl opt"><<</span> cam<span class="hl opt">-></span><span class="hl kwd">id</span><span class="hl opt">() <<</span> <span class="hl str">" is missing"</span><span class="hl opt">;</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl com">/* Create a CameraDevice instance to wrap the libcamera Camera. */</span>
<span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>CameraDevice<span class="hl opt">></span> camera <span class="hl opt">=</span> <span class="hl kwc">CameraDevice</span><span class="hl opt">::</span><span class="hl kwd">create</span><span class="hl opt">(</span>id<span class="hl opt">,</span> cam<span class="hl opt">);</span>
<span class="hl kwb">int</span> ret <span class="hl opt">=</span> camera<span class="hl opt">-></span><span class="hl kwd">initialize</span><span class="hl opt">(</span>cameraConfigData<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>ret<span class="hl opt">) {</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>HAL<span class="hl opt">,</span> Error<span class="hl opt">) <<</span> <span class="hl str">"Failed to initialize camera: "</span> <span class="hl opt"><<</span> cam<span class="hl opt">-></span><span class="hl kwd">id</span><span class="hl opt">();</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>isCameraNew<span class="hl opt">) {</span>
cameraIdsMap_<span class="hl opt">.</span><span class="hl kwd">emplace</span><span class="hl opt">(</span>cam<span class="hl opt">-></span><span class="hl kwd">id</span><span class="hl opt">(),</span> id<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>isCameraExternal<span class="hl opt">)</span>
nextExternalCameraId_<span class="hl opt">++;</span>
<span class="hl kwa">else</span>
numInternalCameras_<span class="hl opt">++;</span>
<span class="hl opt">}</span>
cameras_<span class="hl opt">.</span><span class="hl kwd">emplace_back</span><span class="hl opt">(</span><span class="hl kwc">std</span><span class="hl opt">::</span><span class="hl kwd">move</span><span class="hl opt">(</span>camera<span class="hl opt">));</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>callbacks_<span class="hl opt">)</span>
callbacks_<span class="hl opt">-></span><span class="hl kwd">camera_device_status_change</span><span class="hl opt">(</span>callbacks_<span class="hl opt">,</span> id<span class="hl opt">,</span>
CAMERA_DEVICE_STATUS_PRESENT<span class="hl opt">);</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>HAL<span class="hl opt">,</span> Debug<span class="hl opt">) <<</span> <span class="hl str">"Camera ID: "</span> <span class="hl opt"><<</span> id <span class="hl opt"><<</span> <span class="hl str">" added successfully."</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">void</span> <span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span><span class="hl kwd">cameraRemoved</span><span class="hl opt">(</span><span class="hl kwc">std</span><span class="hl opt">::</span>shared_ptr<span class="hl opt"><</span>Camera<span class="hl opt">></span> cam<span class="hl opt">)</span>
<span class="hl opt">{</span>
MutexLocker <span class="hl kwd">locker</span><span class="hl opt">(</span>mutex_<span class="hl opt">);</span>
<span class="hl kwc">auto</span> iter <span class="hl opt">=</span> <span class="hl kwc">std</span><span class="hl opt">::</span><span class="hl kwd">find_if</span><span class="hl opt">(</span>cameras_<span class="hl opt">.</span><span class="hl kwd">begin</span><span class="hl opt">(),</span> cameras_<span class="hl opt">.</span><span class="hl kwd">end</span><span class="hl opt">(),</span>
<span class="hl opt">[&</span>cam<span class="hl opt">](</span><span class="hl kwb">const</span> <span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>CameraDevice<span class="hl opt">> &</span>camera<span class="hl opt">) {</span>
<span class="hl kwa">return</span> cam <span class="hl opt">==</span> camera<span class="hl opt">-></span><span class="hl kwd">camera</span><span class="hl opt">();</span>
<span class="hl opt">});</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>iter <span class="hl opt">==</span> cameras_<span class="hl opt">.</span><span class="hl kwd">end</span><span class="hl opt">())</span>
<span class="hl kwa">return</span><span class="hl opt">;</span>
<span class="hl com">/*</span>
<span class="hl com"> * CAMERA_DEVICE_STATUS_NOT_PRESENT should be set for external cameras</span>
<span class="hl com"> * only.</span>
<span class="hl com"> */</span>
<span class="hl kwb">unsigned int</span> id <span class="hl opt">= (*</span>iter<span class="hl opt">)-></span><span class="hl kwd">id</span><span class="hl opt">();</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>id <span class="hl opt">>=</span> firstExternalCameraId_<span class="hl opt">)</span>
callbacks_<span class="hl opt">-></span><span class="hl kwd">camera_device_status_change</span><span class="hl opt">(</span>callbacks_<span class="hl opt">,</span> id<span class="hl opt">,</span>
CAMERA_DEVICE_STATUS_NOT_PRESENT<span class="hl opt">);</span>
<span class="hl com">/*</span>
<span class="hl com"> * \todo Check if the camera is already open and running.</span>
<span class="hl com"> * Inform the framework about its absence before deleting its</span>
<span class="hl com"> * reference here.</span>
<span class="hl com"> */</span>
cameras_<span class="hl opt">.</span><span class="hl kwd">erase</span><span class="hl opt">(</span>iter<span class="hl opt">);</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>HAL<span class="hl opt">,</span> Debug<span class="hl opt">) <<</span> <span class="hl str">"Camera ID: "</span> <span class="hl opt"><<</span> id <span class="hl opt"><<</span> <span class="hl str">" removed successfully."</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">int32_t</span> <span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span><span class="hl kwd">cameraLocation</span><span class="hl opt">(</span><span class="hl kwb">const</span> Camera <span class="hl opt">*</span>cam<span class="hl opt">)</span>
<span class="hl opt">{</span>
<span class="hl kwb">const</span> ControlList <span class="hl opt">&</span>properties <span class="hl opt">=</span> cam<span class="hl opt">-></span><span class="hl kwd">properties</span><span class="hl opt">();</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>properties<span class="hl opt">.</span><span class="hl kwd">contains</span><span class="hl opt">(</span><span class="hl kwc">properties</span><span class="hl opt">::</span>Location<span class="hl opt">))</span>
<span class="hl kwa">return</span> <span class="hl opt">-</span><span class="hl num">1</span><span class="hl opt">;</span>
<span class="hl kwa">return</span> properties<span class="hl opt">.</span><span class="hl kwd">get</span><span class="hl opt">(</span><span class="hl kwc">properties</span><span class="hl opt">::</span>Location<span class="hl opt">);</span>
<span class="hl opt">}</span>
CameraDevice <span class="hl opt">*</span><span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span><span class="hl kwd">cameraDeviceFromHalId</span><span class="hl opt">(</span><span class="hl kwb">unsigned int</span> id<span class="hl opt">)</span>
<span class="hl opt">{</span>
<span class="hl kwc">auto</span> iter <span class="hl opt">=</span> <span class="hl kwc">std</span><span class="hl opt">::</span><span class="hl kwd">find_if</span><span class="hl opt">(</span>cameras_<span class="hl opt">.</span><span class="hl kwd">begin</span><span class="hl opt">(),</span> cameras_<span class="hl opt">.</span><span class="hl kwd">end</span><span class="hl opt">(),</span>
<span class="hl opt">[</span>id<span class="hl opt">](</span><span class="hl kwb">const</span> <span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>CameraDevice<span class="hl opt">> &</span>camera<span class="hl opt">) {</span>
<span class="hl kwa">return</span> camera<span class="hl opt">-></span><span class="hl kwd">id</span><span class="hl opt">() ==</span> id<span class="hl opt">;</span>
<span class="hl opt">});</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>iter <span class="hl opt">==</span> cameras_<span class="hl opt">.</span><span class="hl kwd">end</span><span class="hl opt">())</span>
<span class="hl kwa">return</span> <span class="hl kwc">nullptr</span><span class="hl opt">;</span>
<span class="hl kwa">return</span> iter<span class="hl opt">-></span><span class="hl kwd">get</span><span class="hl opt">();</span>
<span class="hl opt">}</span>
<span class="hl kwb">unsigned int</span> <span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span><span class="hl kwd">numCameras</span><span class="hl opt">()</span> <span class="hl kwb">const</span>
<span class="hl opt">{</span>
<span class="hl kwa">return</span> numInternalCameras_<span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">int</span> <span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span><span class="hl kwd">getCameraInfo</span><span class="hl opt">(</span><span class="hl kwb">unsigned int</span> id<span class="hl opt">,</span> <span class="hl kwb">struct</span> camera_info <span class="hl opt">*</span>info<span class="hl opt">)</span>
<span class="hl opt">{</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>info<span class="hl opt">)</span>
<span class="hl kwa">return</span> <span class="hl opt">-</span>EINVAL<span class="hl opt">;</span>
MutexLocker <span class="hl kwd">locker</span><span class="hl opt">(</span>mutex_<span class="hl opt">);</span>
CameraDevice <span class="hl opt">*</span>camera <span class="hl opt">=</span> <span class="hl kwd">cameraDeviceFromHalId</span><span class="hl opt">(</span>id<span class="hl opt">);</span>
<span class="hl kwa">if</span> <span class="hl opt">(!</span>camera<span class="hl opt">) {</span>
<span class="hl kwd">LOG</span><span class="hl opt">(</span>HAL<span class="hl opt">,</span> Error<span class="hl opt">) <<</span> <span class="hl str">"Invalid camera id '"</span> <span class="hl opt"><<</span> id <span class="hl opt"><<</span> <span class="hl str">"'"</span><span class="hl opt">;</span>
<span class="hl kwa">return</span> <span class="hl opt">-</span>EINVAL<span class="hl opt">;</span>
<span class="hl opt">}</span>
info<span class="hl opt">-></span>facing <span class="hl opt">=</span> camera<span class="hl opt">-></span><span class="hl kwd">facing</span><span class="hl opt">();</span>
info<span class="hl opt">-></span>orientation <span class="hl opt">=</span> camera<span class="hl opt">-></span><span class="hl kwd">orientation</span><span class="hl opt">();</span>
info<span class="hl opt">-></span>device_version <span class="hl opt">=</span> CAMERA_DEVICE_API_VERSION_3_3<span class="hl opt">;</span>
info<span class="hl opt">-></span>resource_cost <span class="hl opt">=</span> <span class="hl num">0</span><span class="hl opt">;</span>
info<span class="hl opt">-></span>static_camera_characteristics <span class="hl opt">=</span> camera<span class="hl opt">-></span><span class="hl kwd">getStaticMetadata</span><span class="hl opt">();</span>
info<span class="hl opt">-></span>conflicting_devices <span class="hl opt">=</span> <span class="hl kwc">nullptr</span><span class="hl opt">;</span>
info<span class="hl opt">-></span>conflicting_devices_length <span class="hl opt">=</span> <span class="hl num">0</span><span class="hl opt">;</span>
<span class="hl kwa">return</span> <span class="hl num">0</span><span class="hl opt">;</span>
<span class="hl opt">}</span>
<span class="hl kwb">void</span> <span class="hl kwc">CameraHalManager</span><span class="hl opt">::</span><span class="hl kwd">setCallbacks</span><span class="hl opt">(</span><span class="hl kwb">const</span> camera_module_callbacks_t <span class="hl opt">*</span>callbacks<span class="hl opt">)</span>
<span class="hl opt">{</span>
callbacks_ <span class="hl opt">=</span> callbacks<span class="hl opt">;</span>
MutexLocker <span class="hl kwd">locker</span><span class="hl opt">(</span>mutex_<span class="hl opt">);</span>
<span class="hl com">/*</span>
<span class="hl com"> * Some external cameras may have been identified before the callbacks_</span>
<span class="hl com"> * were set. Iterate all existing external cameras and mark them as</span>
<span class="hl com"> * CAMERA_DEVICE_STATUS_PRESENT explicitly.</span>
<span class="hl com"> *</span>
<span class="hl com"> * Internal cameras are already assumed to be present at module load</span>
<span class="hl com"> * time by the Android framework.</span>
<span class="hl com"> */</span>
<span class="hl kwa">for</span> <span class="hl opt">(</span><span class="hl kwb">const</span> <span class="hl kwc">std</span><span class="hl opt">::</span>unique_ptr<span class="hl opt"><</span>CameraDevice<span class="hl opt">> &</span>camera <span class="hl opt">:</span> cameras_<span class="hl opt">) {</span>
<span class="hl kwb">unsigned int</span> id <span class="hl opt">=</span> camera<span class="hl opt">-></span><span class="hl kwd">id</span><span class="hl opt">();</span>
<span class="hl kwa">if</span> <span class="hl opt">(</span>id <span class="hl opt">>=</span> firstExternalCameraId_<span class="hl opt">)</span>
callbacks_<span class="hl opt">-></span><span class="hl kwd">camera_device_status_change</span><span class="hl opt">(</span>callbacks_<span class="hl opt">,</span> id<span class="hl opt">,</span>
CAMERA_DEVICE_STATUS_PRESENT<span class="hl opt">);</span>
<span class="hl opt">}</span>
<span class="hl opt">}</span>
</code></pre></td></tr></table>
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