USBHostCam.h

00001 // USBHostCam.h
00002 #include "USBHostConf.h"
00003 #include "USBHost.h"
00004 #include "USBIsochronous.h"
00005 #include "BaseUvc.h"
00006 #include "decodeMJPEG.h"
00007 #pragma once
00008 
00009 #define _640x480 1
00010 #define _160x120 2
00011 #define _176x144 3
00012 #define _320x176 4
00013 #define _320x240 5
00014 #define _352x288 6
00015 #define _432x240 7
00016 #define _544x288 8
00017 #define _640x360 9
00018 //
00019 #define _752x416 10
00020 #define _800x448 11
00021 #define _800x600 12
00022 //
00023 #define _864x480 13
00024 #define _960x544 14
00025 #define _960x720 15
00026 //
00027 #define _1024x576 16
00028 #define _1184x656 17
00029 #define _1280x720 18
00030 #define _1280x960 19
00031 
00032 /*
00033 #define _640x480  1
00034 #define _352x288  2
00035 #define _320x240  3
00036 #define _176x144  4
00037 #define _160x120  5
00038 #define _544x288  6
00039 #define _432x240  7
00040 #define _320x176  8
00041 #define _640x360  9
00042 
00043 #define _800x480  10
00044 
00045 #define _1024x768 11
00046 */
00047 
00048 
00049 #define TEST_ASSERT(A) while(!(A)){fprintf(stderr,"\n\n%s@%d %s ASSERT!\n\n",__PRETTY_FUNCTION__,__LINE__,#A);exit(1);};
00050 
00051 struct CamInfo {
00052     uint16_t vid;
00053     uint16_t pid;
00054     uint8_t size;
00055     uint8_t option;
00056 //
00057     const char* name;
00058     uint8_t formatIndex;
00059     uint8_t frameIndex;
00060     uint32_t interval;
00061     uint8_t en;
00062     uint16_t mps;
00063     uint8_t if_alt;
00064     uint8_t frameCount; // ITD frame count 1-8
00065     uint8_t queueLimit; // ITD queue limit 1-3
00066 };
00067 
00068 /** 
00069  * A class to communicate a Cam
00070  */
00071 class USBHostCam : public IUSBEnumerator, public BaseUvc, public decodeMJPEG {
00072 public:
00073     /**
00074     * Constructor
00075     *
00076     */
00077     USBHostCam(uint8_t size = _160x120, uint8_t option = 0, CamInfo* user_caminfo = NULL);
00078 
00079     /**
00080     * Check if a Cam device is connected
00081     *
00082     * @return true if a Cam device is connected
00083     */
00084     bool connected();
00085 
00086     /**
00087     * Check if a usb connector is plugged
00088     *
00089     * @return true if a connector is plugged
00090     */
00091     bool plugged();
00092 
00093     /**
00094      * Try to connect to a Cam device
00095      *
00096      * @return true if connection was successful
00097      */
00098     bool connect();
00099 
00100     /**
00101      * read jpeg image
00102      *
00103      * @param buf read buffer 
00104      * @param size buffer size 
00105      * @param timeout_ms timeout default 15sec
00106      * @return jpeg size if read success else -1
00107      */
00108     int readJPEG(uint8_t* buf, int size, int timeout_ms = 15*1000);
00109 
00110 protected:
00111     //From IUSBEnumerator
00112     virtual void setVidPid(uint16_t vid, uint16_t pid);
00113     virtual bool parseInterface(uint8_t intf_nb, uint8_t intf_class, uint8_t intf_subclass, uint8_t intf_protocol); //Must return true if the interface should be parsed
00114     virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used
00115 
00116 private:
00117     bool dev_connected;
00118 
00119     int cam_intf;
00120     bool device_found;
00121     bool caminfo_found;
00122     uint8_t _seq;
00123     uint8_t* _buf;
00124     int _pos;
00125     int _size;
00126     CamInfo* CamInfoList;
00127     CamInfo* caminfo;
00128     uint8_t _caminfo_size;
00129     uint8_t _caminfo_option;
00130 
00131     virtual void outputJPEG(uint8_t c, int status); // from decodeMJPEG
00132     void callback_motion_jpeg(uint16_t frame, uint8_t* buf, int len);
00133     void init();
00134     void onDisconnect();
00135 };