1# Photographing<a name="EN-US_TOPIC_0000001054915940"></a> 2 3## When to Use<a name="en-us_topic_0000001052170554_section1963312376119"></a> 4 5Use the camera module APIs to capture frames \(photographing\). 6 7## Available APIs<a name="en-us_topic_0000001052170554_section56549532016"></a> 8 9**Table 1** APIs for photographing 10 11<a name="en-us_topic_0000001052170554_table2069447114914"></a> 12<table><thead align="left"><tr id="en-us_topic_0000001052170554_row4903852104914"><th class="cellrowborder" valign="top" width="18.811881188118814%" id="mcps1.2.4.1.1"><p id="en-us_topic_0000001052170554_p2903252174918"><a name="en-us_topic_0000001052170554_p2903252174918"></a><a name="en-us_topic_0000001052170554_p2903252174918"></a>Class</p> 13</th> 14<th class="cellrowborder" valign="top" width="46.534653465346544%" id="mcps1.2.4.1.2"><p id="en-us_topic_0000001052170554_p1595113912507"><a name="en-us_topic_0000001052170554_p1595113912507"></a><a name="en-us_topic_0000001052170554_p1595113912507"></a>Function</p> 15</th> 16<th class="cellrowborder" valign="top" width="34.65346534653466%" id="mcps1.2.4.1.3"><p id="en-us_topic_0000001052170554_p15951597508"><a name="en-us_topic_0000001052170554_p15951597508"></a><a name="en-us_topic_0000001052170554_p15951597508"></a>Description</p> 17</th> 18</tr> 19</thead> 20<tbody><tr id="en-us_topic_0000001052170554_row492815717494"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p1592812716495"><a name="en-us_topic_0000001052170554_p1592812716495"></a><a name="en-us_topic_0000001052170554_p1592812716495"></a>CameraKit</p> 21</td> 22<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p1492837144919"><a name="en-us_topic_0000001052170554_p1492837144919"></a><a name="en-us_topic_0000001052170554_p1492837144919"></a>int32_t GetCameraIds(std::list<string> cameraList)</p> 23</td> 24<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p2092807134919"><a name="en-us_topic_0000001052170554_p2092807134919"></a><a name="en-us_topic_0000001052170554_p2092807134919"></a>Obtains IDs of cameras that are currently available.</p> 25</td> 26</tr> 27<tr id="en-us_topic_0000001052170554_row11928157114912"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p139287774911"><a name="en-us_topic_0000001052170554_p139287774911"></a><a name="en-us_topic_0000001052170554_p139287774911"></a>CameraKit</p> 28</td> 29<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p9928107174915"><a name="en-us_topic_0000001052170554_p9928107174915"></a><a name="en-us_topic_0000001052170554_p9928107174915"></a>CameraAbility& GetCameraAbility(string cameraId)</p> 30</td> 31<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p139281171494"><a name="en-us_topic_0000001052170554_p139281171494"></a><a name="en-us_topic_0000001052170554_p139281171494"></a>Obtains the camera capability</p> 32</td> 33</tr> 34<tr id="en-us_topic_0000001052170554_row119282719496"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p159288734914"><a name="en-us_topic_0000001052170554_p159288734914"></a><a name="en-us_topic_0000001052170554_p159288734914"></a>CameraKit</p> 35</td> 36<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p99280794913"><a name="en-us_topic_0000001052170554_p99280794913"></a><a name="en-us_topic_0000001052170554_p99280794913"></a>void RegisterCameraDeviceCallback(CameraDeviceCallback* callback, EventHandler* handler)</p> 37</td> 38<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p8928197134910"><a name="en-us_topic_0000001052170554_p8928197134910"></a><a name="en-us_topic_0000001052170554_p8928197134910"></a>Registers a camera callback for camera status changes.</p> 39</td> 40</tr> 41<tr id="en-us_topic_0000001052170554_row4928673496"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p14928770497"><a name="en-us_topic_0000001052170554_p14928770497"></a><a name="en-us_topic_0000001052170554_p14928770497"></a>CameraKit</p> 42</td> 43<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p14928197194915"><a name="en-us_topic_0000001052170554_p14928197194915"></a><a name="en-us_topic_0000001052170554_p14928197194915"></a>void UnregisterCameraDeviceCallback(CameraDeviceCallback* callback)</p> 44</td> 45<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p17929197134913"><a name="en-us_topic_0000001052170554_p17929197134913"></a><a name="en-us_topic_0000001052170554_p17929197134913"></a>Unregisters a camera callback.</p> 46</td> 47</tr> 48<tr id="en-us_topic_0000001052170554_row16929187104912"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p6929157184911"><a name="en-us_topic_0000001052170554_p6929157184911"></a><a name="en-us_topic_0000001052170554_p6929157184911"></a>CameraKit</p> 49</td> 50<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p1192910704914"><a name="en-us_topic_0000001052170554_p1192910704914"></a><a name="en-us_topic_0000001052170554_p1192910704914"></a>void CreateCamera(string cameraId, CameraStateCallback* callback, EventHandler* handler)</p> 51</td> 52<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p12929167154912"><a name="en-us_topic_0000001052170554_p12929167154912"></a><a name="en-us_topic_0000001052170554_p12929167154912"></a>Creates a <strong id="en-us_topic_0000001052170554_b1512582132318"><a name="en-us_topic_0000001052170554_b1512582132318"></a><a name="en-us_topic_0000001052170554_b1512582132318"></a>Camera</strong> instance.</p> 53</td> 54</tr> 55<tr id="en-us_topic_0000001052170554_row592967184912"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p9929127134915"><a name="en-us_topic_0000001052170554_p9929127134915"></a><a name="en-us_topic_0000001052170554_p9929127134915"></a>Camera</p> 56</td> 57<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p0929107204913"><a name="en-us_topic_0000001052170554_p0929107204913"></a><a name="en-us_topic_0000001052170554_p0929107204913"></a>string GetCameraId()</p> 58</td> 59<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p1592914710490"><a name="en-us_topic_0000001052170554_p1592914710490"></a><a name="en-us_topic_0000001052170554_p1592914710490"></a>Obtains the camera ID.</p> 60</td> 61</tr> 62<tr id="en-us_topic_0000001052170554_row13929197104913"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p16929167134913"><a name="en-us_topic_0000001052170554_p16929167134913"></a><a name="en-us_topic_0000001052170554_p16929167134913"></a>Camera</p> 63</td> 64<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p15929175491"><a name="en-us_topic_0000001052170554_p15929175491"></a><a name="en-us_topic_0000001052170554_p15929175491"></a>CameraConfig& GetCameraConfig()</p> 65</td> 66<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p19298714917"><a name="en-us_topic_0000001052170554_p19298714917"></a><a name="en-us_topic_0000001052170554_p19298714917"></a>Obtains the camera configuration.</p> 67</td> 68</tr> 69<tr id="en-us_topic_0000001052170554_row1892918764915"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p69291072495"><a name="en-us_topic_0000001052170554_p69291072495"></a><a name="en-us_topic_0000001052170554_p69291072495"></a>Camera</p> 70</td> 71<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p5930172494"><a name="en-us_topic_0000001052170554_p5930172494"></a><a name="en-us_topic_0000001052170554_p5930172494"></a>FrameConfig& GetFrameConfig(int32_t type)</p> 72</td> 73<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p19301176495"><a name="en-us_topic_0000001052170554_p19301176495"></a><a name="en-us_topic_0000001052170554_p19301176495"></a>Obtains the frame configuration.</p> 74</td> 75</tr> 76<tr id="en-us_topic_0000001052170554_row893019794915"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p893016714919"><a name="en-us_topic_0000001052170554_p893016714919"></a><a name="en-us_topic_0000001052170554_p893016714919"></a>Camera</p> 77</td> 78<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p1093067134915"><a name="en-us_topic_0000001052170554_p1093067134915"></a><a name="en-us_topic_0000001052170554_p1093067134915"></a>void Configure(CameraConfig& config)</p> 79</td> 80<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p1493037114912"><a name="en-us_topic_0000001052170554_p1493037114912"></a><a name="en-us_topic_0000001052170554_p1493037114912"></a>Configures the camera using the <strong id="en-us_topic_0000001052170554_b1158653521815"><a name="en-us_topic_0000001052170554_b1158653521815"></a><a name="en-us_topic_0000001052170554_b1158653521815"></a>CameraConfig</strong> object.</p> 81</td> 82</tr> 83<tr id="en-us_topic_0000001052170554_row11930197174917"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p4930197184914"><a name="en-us_topic_0000001052170554_p4930197184914"></a><a name="en-us_topic_0000001052170554_p4930197184914"></a>Camera</p> 84</td> 85<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p19304717492"><a name="en-us_topic_0000001052170554_p19304717492"></a><a name="en-us_topic_0000001052170554_p19304717492"></a>void Release()</p> 86</td> 87<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p189301479494"><a name="en-us_topic_0000001052170554_p189301479494"></a><a name="en-us_topic_0000001052170554_p189301479494"></a>Releases the <strong id="en-us_topic_0000001052170554_b12391143101812"><a name="en-us_topic_0000001052170554_b12391143101812"></a><a name="en-us_topic_0000001052170554_b12391143101812"></a>Camera</strong> object and associated resources.</p> 88</td> 89</tr> 90<tr id="en-us_topic_0000001052170554_row109304717499"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p4930873496"><a name="en-us_topic_0000001052170554_p4930873496"></a><a name="en-us_topic_0000001052170554_p4930873496"></a>Camera</p> 91</td> 92<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p1893017720490"><a name="en-us_topic_0000001052170554_p1893017720490"></a><a name="en-us_topic_0000001052170554_p1893017720490"></a>int TriggerLoopingCapture(FrameConfig& frameConfig)</p> 93</td> 94<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p149307754918"><a name="en-us_topic_0000001052170554_p149307754918"></a><a name="en-us_topic_0000001052170554_p149307754918"></a>Starts looping-frame capture.</p> 95</td> 96</tr> 97<tr id="en-us_topic_0000001052170554_row19306794915"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p6930167194910"><a name="en-us_topic_0000001052170554_p6930167194910"></a><a name="en-us_topic_0000001052170554_p6930167194910"></a>Camera</p> 98</td> 99<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p139311577499"><a name="en-us_topic_0000001052170554_p139311577499"></a><a name="en-us_topic_0000001052170554_p139311577499"></a>void StopLoopingCapture()</p> 100</td> 101<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p693115764914"><a name="en-us_topic_0000001052170554_p693115764914"></a><a name="en-us_topic_0000001052170554_p693115764914"></a>Stops looping-frame capture.</p> 102</td> 103</tr> 104<tr id="en-us_topic_0000001052170554_row593116713492"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p1193187174913"><a name="en-us_topic_0000001052170554_p1193187174913"></a><a name="en-us_topic_0000001052170554_p1193187174913"></a>Camera</p> 105</td> 106<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p1493111713496"><a name="en-us_topic_0000001052170554_p1493111713496"></a><a name="en-us_topic_0000001052170554_p1493111713496"></a>int32_t TriggerSingleCapture(FrameConfig& frameConfig)</p> 107</td> 108<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p1193137104919"><a name="en-us_topic_0000001052170554_p1193137104919"></a><a name="en-us_topic_0000001052170554_p1193137104919"></a>Starts single-frame capture.</p> 109</td> 110</tr> 111<tr id="en-us_topic_0000001052170554_row1693112711491"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p89312716494"><a name="en-us_topic_0000001052170554_p89312716494"></a><a name="en-us_topic_0000001052170554_p89312716494"></a>CameraConfig</p> 112</td> 113<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p199312784912"><a name="en-us_topic_0000001052170554_p199312784912"></a><a name="en-us_topic_0000001052170554_p199312784912"></a>void SetFrameStateCallback(FrameStateCallback* callback, EventHandler* handler);</p> 114</td> 115<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p49312714495"><a name="en-us_topic_0000001052170554_p49312714495"></a><a name="en-us_topic_0000001052170554_p49312714495"></a>Sets a frame state callback to respond to state changes.</p> 116</td> 117</tr> 118<tr id="en-us_topic_0000001052170554_row9931076492"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p59317784917"><a name="en-us_topic_0000001052170554_p59317784917"></a><a name="en-us_topic_0000001052170554_p59317784917"></a>CameraConfig</p> 119</td> 120<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p17931197124912"><a name="en-us_topic_0000001052170554_p17931197124912"></a><a name="en-us_topic_0000001052170554_p17931197124912"></a>static CameraConfig* CreateCameraConfig()</p> 121</td> 122<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p5931177164912"><a name="en-us_topic_0000001052170554_p5931177164912"></a><a name="en-us_topic_0000001052170554_p5931177164912"></a>Creates a <strong id="en-us_topic_0000001052170554_b101608165182"><a name="en-us_topic_0000001052170554_b101608165182"></a><a name="en-us_topic_0000001052170554_b101608165182"></a>CameraConfig</strong> instance.</p> 123</td> 124</tr> 125<tr id="en-us_topic_0000001052170554_row29321744917"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p1093219716492"><a name="en-us_topic_0000001052170554_p1093219716492"></a><a name="en-us_topic_0000001052170554_p1093219716492"></a>CameraAbility</p> 126</td> 127<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p12932979493"><a name="en-us_topic_0000001052170554_p12932979493"></a><a name="en-us_topic_0000001052170554_p12932979493"></a>std::list<Size> GetSupportedSizes(int format)</p> 128</td> 129<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p1493210764918"><a name="en-us_topic_0000001052170554_p1493210764918"></a><a name="en-us_topic_0000001052170554_p1493210764918"></a>Obtains the supported image sizes for a specified image format.</p> 130</td> 131</tr> 132<tr id="en-us_topic_0000001052170554_row1193267184910"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p1393214717492"><a name="en-us_topic_0000001052170554_p1393214717492"></a><a name="en-us_topic_0000001052170554_p1393214717492"></a>CameraAbility</p> 133</td> 134<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p119321477495"><a name="en-us_topic_0000001052170554_p119321477495"></a><a name="en-us_topic_0000001052170554_p119321477495"></a>std::list<T> GetParameterRange(uint32_t key)</p> 135</td> 136<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p139331079491"><a name="en-us_topic_0000001052170554_p139331079491"></a><a name="en-us_topic_0000001052170554_p139331079491"></a>Obtains the parameter value range based on a specified parameter key.</p> 137</td> 138</tr> 139<tr id="en-us_topic_0000001052170554_row0933197134920"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p1493310764917"><a name="en-us_topic_0000001052170554_p1493310764917"></a><a name="en-us_topic_0000001052170554_p1493310764917"></a>CameraDevice</p> 140</td> 141<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p493313724915"><a name="en-us_topic_0000001052170554_p493313724915"></a><a name="en-us_topic_0000001052170554_p493313724915"></a>CameraDeviceCallback()</p> 142</td> 143<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p993416724915"><a name="en-us_topic_0000001052170554_p993416724915"></a><a name="en-us_topic_0000001052170554_p993416724915"></a>A constructor used to create a <strong id="en-us_topic_0000001052170554_b99481043111719"><a name="en-us_topic_0000001052170554_b99481043111719"></a><a name="en-us_topic_0000001052170554_b99481043111719"></a>CameraDeviceCallback</strong> instance.</p> 144</td> 145</tr> 146<tr id="en-us_topic_0000001052170554_row093418712498"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p159341779492"><a name="en-us_topic_0000001052170554_p159341779492"></a><a name="en-us_topic_0000001052170554_p159341779492"></a>CameraDevice</p> 147</td> 148<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p1493411774912"><a name="en-us_topic_0000001052170554_p1493411774912"></a><a name="en-us_topic_0000001052170554_p1493411774912"></a>void OnCameraStatus(std::string cameraId, int32_t status)</p> 149</td> 150<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p1393419715491"><a name="en-us_topic_0000001052170554_p1393419715491"></a><a name="en-us_topic_0000001052170554_p1393419715491"></a>Called when the camera device status changes.</p> 151</td> 152</tr> 153<tr id="en-us_topic_0000001052170554_row109348711497"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p993419724914"><a name="en-us_topic_0000001052170554_p993419724914"></a><a name="en-us_topic_0000001052170554_p993419724914"></a>CameraStateCallback</p> 154</td> 155<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p993418720497"><a name="en-us_topic_0000001052170554_p993418720497"></a><a name="en-us_topic_0000001052170554_p993418720497"></a>CameraStateCallback()</p> 156</td> 157<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p693511794919"><a name="en-us_topic_0000001052170554_p693511794919"></a><a name="en-us_topic_0000001052170554_p693511794919"></a>A constructor used to create a <strong id="en-us_topic_0000001052170554_b10634201491717"><a name="en-us_topic_0000001052170554_b10634201491717"></a><a name="en-us_topic_0000001052170554_b10634201491717"></a>CameraStateCallback</strong> instance.</p> 158</td> 159</tr> 160<tr id="en-us_topic_0000001052170554_row159358717497"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p1992012253527"><a name="en-us_topic_0000001052170554_p1992012253527"></a><a name="en-us_topic_0000001052170554_p1992012253527"></a>CameraStateCallback</p> 161</td> 162<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p29351077497"><a name="en-us_topic_0000001052170554_p29351077497"></a><a name="en-us_topic_0000001052170554_p29351077497"></a>void OnConfigured(Camera& camera)</p> 163</td> 164<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p093515774914"><a name="en-us_topic_0000001052170554_p093515774914"></a><a name="en-us_topic_0000001052170554_p093515774914"></a>Called when the camera is configured.</p> 165</td> 166</tr> 167<tr id="en-us_topic_0000001052170554_row9935147184918"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p117291328135211"><a name="en-us_topic_0000001052170554_p117291328135211"></a><a name="en-us_topic_0000001052170554_p117291328135211"></a>CameraStateCallback</p> 168</td> 169<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p19935174496"><a name="en-us_topic_0000001052170554_p19935174496"></a><a name="en-us_topic_0000001052170554_p19935174496"></a>void OnConfigureFailed(Camera& camera,int32_t errorCode)</p> 170</td> 171<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p159352077495"><a name="en-us_topic_0000001052170554_p159352077495"></a><a name="en-us_topic_0000001052170554_p159352077495"></a>Called when the camera fails to be configured.</p> 172</td> 173</tr> 174<tr id="en-us_topic_0000001052170554_row1935279498"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p1514619311525"><a name="en-us_topic_0000001052170554_p1514619311525"></a><a name="en-us_topic_0000001052170554_p1514619311525"></a>CameraStateCallback</p> 175</td> 176<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p493512744915"><a name="en-us_topic_0000001052170554_p493512744915"></a><a name="en-us_topic_0000001052170554_p493512744915"></a>void OnCreated(Camera& camera)</p> 177</td> 178<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p1493511784914"><a name="en-us_topic_0000001052170554_p1493511784914"></a><a name="en-us_topic_0000001052170554_p1493511784914"></a>Called when the camera is successfully created.</p> 179</td> 180</tr> 181<tr id="en-us_topic_0000001052170554_row189351877493"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p172071933175218"><a name="en-us_topic_0000001052170554_p172071933175218"></a><a name="en-us_topic_0000001052170554_p172071933175218"></a>CameraStateCallback</p> 182</td> 183<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p129361977498"><a name="en-us_topic_0000001052170554_p129361977498"></a><a name="en-us_topic_0000001052170554_p129361977498"></a>void OnCreateFailed(std::string cameraId,int32_t errorCode)</p> 184</td> 185<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p2936197114919"><a name="en-us_topic_0000001052170554_p2936197114919"></a><a name="en-us_topic_0000001052170554_p2936197114919"></a>Called when the camera fails to be created.</p> 186</td> 187</tr> 188<tr id="en-us_topic_0000001052170554_row20936472491"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p61213391523"><a name="en-us_topic_0000001052170554_p61213391523"></a><a name="en-us_topic_0000001052170554_p61213391523"></a>CameraStateCallback</p> 189</td> 190<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p793697174919"><a name="en-us_topic_0000001052170554_p793697174919"></a><a name="en-us_topic_0000001052170554_p793697174919"></a>void OnReleased(Camera& camera)</p> 191</td> 192<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p49361719495"><a name="en-us_topic_0000001052170554_p49361719495"></a><a name="en-us_topic_0000001052170554_p49361719495"></a>Called when the camera is released.</p> 193</td> 194</tr> 195<tr id="en-us_topic_0000001052170554_row159361179493"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p10936147194918"><a name="en-us_topic_0000001052170554_p10936147194918"></a><a name="en-us_topic_0000001052170554_p10936147194918"></a>FrameStateCallback</p> 196</td> 197<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p9936279496"><a name="en-us_topic_0000001052170554_p9936279496"></a><a name="en-us_topic_0000001052170554_p9936279496"></a>FrameStateCallback()</p> 198</td> 199<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p49367718499"><a name="en-us_topic_0000001052170554_p49367718499"></a><a name="en-us_topic_0000001052170554_p49367718499"></a>A constructor used to create a <strong id="en-us_topic_0000001052170554_b225612012172"><a name="en-us_topic_0000001052170554_b225612012172"></a><a name="en-us_topic_0000001052170554_b225612012172"></a>FrameStateCallback</strong> instance.</p> 200</td> 201</tr> 202<tr id="en-us_topic_0000001052170554_row1893617744916"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p136968511524"><a name="en-us_topic_0000001052170554_p136968511524"></a><a name="en-us_topic_0000001052170554_p136968511524"></a>FrameStateCallback</p> 203</td> 204<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p209379744911"><a name="en-us_topic_0000001052170554_p209379744911"></a><a name="en-us_topic_0000001052170554_p209379744911"></a>void OnFrameFinished(Camera& camera, FrameConfig& frameConfig, FrameResult& frameResult)</p> 205</td> 206<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p19374724913"><a name="en-us_topic_0000001052170554_p19374724913"></a><a name="en-us_topic_0000001052170554_p19374724913"></a>Called when the frame capture is completed.</p> 207</td> 208</tr> 209<tr id="en-us_topic_0000001052170554_row093719718495"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p772975317527"><a name="en-us_topic_0000001052170554_p772975317527"></a><a name="en-us_topic_0000001052170554_p772975317527"></a>FrameStateCallback</p> 210</td> 211<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p189371471498"><a name="en-us_topic_0000001052170554_p189371471498"></a><a name="en-us_topic_0000001052170554_p189371471498"></a>void OnFrameError(Camera& camera, FrameConfig& frameConfig, int32_t errorCode, FrameResult& frameResult)</p> 212</td> 213<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p109371778497"><a name="en-us_topic_0000001052170554_p109371778497"></a><a name="en-us_topic_0000001052170554_p109371778497"></a>Called when the frame capture fails.</p> 214</td> 215</tr> 216<tr id="en-us_topic_0000001052170554_row179381979499"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p169381975499"><a name="en-us_topic_0000001052170554_p169381975499"></a><a name="en-us_topic_0000001052170554_p169381975499"></a>FrameConfig</p> 217</td> 218<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p1793867124910"><a name="en-us_topic_0000001052170554_p1793867124910"></a><a name="en-us_topic_0000001052170554_p1793867124910"></a>int32_t GetFrameConfigType()</p> 219</td> 220<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p1993817744915"><a name="en-us_topic_0000001052170554_p1993817744915"></a><a name="en-us_topic_0000001052170554_p1993817744915"></a>Obtains the frame configuration type.</p> 221</td> 222</tr> 223<tr id="en-us_topic_0000001052170554_row793817784912"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p69381724914"><a name="en-us_topic_0000001052170554_p69381724914"></a><a name="en-us_topic_0000001052170554_p69381724914"></a>FrameConfig</p> 224</td> 225<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p149382077496"><a name="en-us_topic_0000001052170554_p149382077496"></a><a name="en-us_topic_0000001052170554_p149382077496"></a>std::list<OHOS::Surface> GetSurfaces()</p> 226</td> 227<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p893867114919"><a name="en-us_topic_0000001052170554_p893867114919"></a><a name="en-us_topic_0000001052170554_p893867114919"></a>Obtains a list of surface objects (shared memories).</p> 228</td> 229</tr> 230<tr id="en-us_topic_0000001052170554_row109401570498"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p294019712492"><a name="en-us_topic_0000001052170554_p294019712492"></a><a name="en-us_topic_0000001052170554_p294019712492"></a>FrameConfig</p> 231</td> 232<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p19940170499"><a name="en-us_topic_0000001052170554_p19940170499"></a><a name="en-us_topic_0000001052170554_p19940170499"></a>void AddSurface(OHOS::AGP::UISurface& surface);</p> 233</td> 234<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p11940197144915"><a name="en-us_topic_0000001052170554_p11940197144915"></a><a name="en-us_topic_0000001052170554_p11940197144915"></a>Adds a surface.</p> 235</td> 236</tr> 237<tr id="en-us_topic_0000001052170554_row994018711492"><td class="cellrowborder" valign="top" width="18.811881188118814%" headers="mcps1.2.4.1.1 "><p id="en-us_topic_0000001052170554_p1094016718493"><a name="en-us_topic_0000001052170554_p1094016718493"></a><a name="en-us_topic_0000001052170554_p1094016718493"></a>FrameConfig</p> 238</td> 239<td class="cellrowborder" valign="top" width="46.534653465346544%" headers="mcps1.2.4.1.2 "><p id="en-us_topic_0000001052170554_p139411279498"><a name="en-us_topic_0000001052170554_p139411279498"></a><a name="en-us_topic_0000001052170554_p139411279498"></a>void RemoveSurface(OHOS::AGP::UISurface& surface);</p> 240</td> 241<td class="cellrowborder" valign="top" width="34.65346534653466%" headers="mcps1.2.4.1.3 "><p id="en-us_topic_0000001052170554_p39415717494"><a name="en-us_topic_0000001052170554_p39415717494"></a><a name="en-us_topic_0000001052170554_p39415717494"></a>Removes a surface.</p> 242</td> 243</tr> 244</tbody> 245</table> 246 247## Limitations and Constraints<a name="en-us_topic_0000001052170554_section1165911177314"></a> 248 249None 250 251## How to Develop<a name="en-us_topic_0000001052170554_section138543918214"></a> 252 2531. Extend the **CameraDeviceCallback** class and call **OnCameraStatus** to customize operations when the camera device changes, for example, when a camera becomes available or unavailable. 254 255 ``` 256 class SampleCameraDeviceCallback : public CameraDeviceCallback { 257 void OnCameraStatus(std::string cameraId, int32_t status) override 258 { 259 // Do something when camera is available or unavailable. 260 } 261 }; 262 ``` 263 2642. Extend the **FrameStateCallback** class. After obtaining the frame data, save the data as a file. 265 266 ``` 267 static void SampleSaveCapture(const char *p, uint32_t size) 268 { 269 cout << "Start saving picture" << endl; 270 struct timeval tv; 271 gettimeofday(&tv, NULL); 272 struct tm *ltm = localtime(&tv.tv_sec); 273 if (ltm != nullptr) { 274 ostringstream ss("Capture_"); 275 ss << "Capture" << ltm->tm_hour << "-" << ltm->tm_min << "-" << ltm->tm_sec << ".jpg"; 276 277 ofstream pic("/sdcard/" + ss.str(), ofstream::out | ofstream::trunc); 278 cout << "write " << size << " bytes" << endl; 279 pic.write(p, size); 280 cout << "Saving picture end" << endl; 281 } 282 } 283 284 class TestFrameStateCallback : public FrameStateCallback { 285 void OnFrameFinished(Camera &camera, FrameConfig &fc, FrameResult &result) override 286 { 287 cout << "Receive frame complete inform." << endl; 288 if (fc.GetFrameConfigType() == FRAME_CONFIG_CAPTURE) { 289 cout << "Capture frame received." << endl; 290 list<Surface *> surfaceList = fc.GetSurfaces(); 291 for (Surface *surface : surfaceList) { 292 SurfaceBuffer *buffer = surface->AcquireBuffer(); 293 if (buffer != nullptr) { 294 char *virtAddr = static_cast<char *>(buffer->GetVirAddr()); 295 if (virtAddr != nullptr) { 296 SampleSaveCapture(virtAddr, buffer->GetSize()); 297 } 298 surface->ReleaseBuffer(buffer); 299 } 300 delete surface; 301 } 302 delete &fc; 303 } 304 } 305 }; 306 ``` 307 3083. Extend the **CameraStateCallback** class and customize operations when the camera state changes \(configuration successful or failed, and creation successful or failed\). 309 310 ``` 311 class SampleCameraStateMng : public CameraStateCallback { 312 public: 313 SampleCameraStateMng() = delete; 314 SampleCameraStateMng(EventHandler &eventHdlr) : eventHdlr_(eventHdlr) {} 315 ~SampleCameraStateMng() 316 { 317 if (recordFd_ != -1) { 318 close(recordFd_); 319 } 320 } 321 void OnCreated(Camera &c) override 322 { 323 cout << "Sample recv OnCreate camera." << endl; 324 auto config = CameraConfig::CreateCameraConfig(); 325 config->SetFrameStateCallback(&fsCb_, &eventHdlr_); 326 c.Configure(*config); 327 cam_ = &c; 328 } 329 void OnCreateFailed(const std::string cameraId, int32_t errorCode) override {} 330 void OnReleased(Camera &c) override {} 331 }; 332 ``` 333 3344. Create a **CameraKit** instance to set and obtain camera information. 335 336 ``` 337 CameraKit *camKit = CameraKit::GetInstance(); 338 list<string> camList = camKit->GetCameraIds(); 339 string camId; 340 for (auto &cam : camList) { 341 cout << "camera name:" << cam << endl; 342 const CameraAbility *ability = camKit->GetCameraAbility(cam); 343 /* Find the camera that fits your ability. */ 344 list<CameraPicSize> sizeList = ability->GetSupportedSizes(0); 345 if (find(sizeList.begin(), sizeList.end(), CAM_PIC_1080P) != sizeList.end()) { 346 camId = cam; 347 break; 348 } 349 } 350 ``` 351 3525. Create a **Camera** instance. 353 354 ``` 355 EventHandler eventHdlr; // Create a thread to handle callback events. 356 SampleCameraStateMng CamStateMng(eventHdlr); 357 358 camKit->CreateCamera(camId, CamStateMng, eventHdlr); 359 ``` 360 3616. Based on the callback design in steps 1 to 3, perform related operations until the **OnCreated** callback obtains **cam\_**. 362 363 ``` 364 void OnCreated(Camera &c) override 365 { 366 cout << "Sample recv OnCreate camera." << endl; 367 auto config = CameraConfig::CreateCameraConfig(); 368 config->SetFrameStateCallback(&fsCb_, &eventHdlr_); 369 c.Configure(*config); 370 cam_ = &c; 371 } 372 373 void Capture() 374 { 375 if (cam_ == nullptr) { 376 cout << "Camera is not ready." << endl; 377 return; 378 } 379 FrameConfig *fc = new FrameConfig(FRAME_CONFIG_CAPTURE); 380 Surface *surface = Surface::CreateSurface(); 381 if (surface == nullptr) { 382 delete fc; 383 return; 384 } 385 surface->SetWidthAndHeight(1920, 1080); /* 1920:width,1080:height */ 386 fc->AddSurface(*surface); 387 cam_->TriggerSingleCapture(*fc); 388 } 389 ``` 390 391 392