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 _160x120 2
00010 #define _176x144 3
00011 #define _320x176 4
00012 #define _320x240 5
00013 #define _352x288 6
00014 #define _432x240 7
00015 #define _640x480 1
00016 #define _544x288 8
00017 #define _640x360 9
00018 #define _752x416 10
00019 #define _800x448 11
00020 #define _800x600 12
00021 
00022 #define TEST_ASSERT(A) while(!(A)){fprintf(stderr,"\n\n%s@%d %s ASSERT!\n\n",__PRETTY_FUNCTION__,__LINE__,#A);exit(1);};
00023 
00024 struct CamInfo {
00025     uint16_t vid;
00026     uint16_t pid;
00027     uint8_t size;
00028     uint8_t option;
00029 //
00030     const char* name;
00031     uint8_t formatIndex;
00032     uint8_t frameIndex;
00033     uint32_t interval;
00034     uint8_t en;
00035     uint8_t mps;
00036     uint8_t if_alt;
00037     uint8_t frameCount; // ITD frame count 1-8
00038     uint8_t queueLimit; // ITD queue limit 1-3
00039 };
00040 
00041 /** 
00042  * A class to communicate a Cam
00043  */
00044 class USBHostCam : public IUSBEnumerator, public BaseUvc, public decodeMJPEG {
00045 public:
00046     /**
00047     * Constructor
00048     *
00049     */
00050     USBHostCam(uint8_t size = _160x120, uint8_t option = 0, CamInfo* user_caminfo = NULL);
00051 
00052     /**
00053     * Check if a Cam device is connected
00054     *
00055     * @return true if a Cam device is connected
00056     */
00057     bool connected();
00058 
00059     /**
00060      * Try to connect to a Cam device
00061      *
00062      * @return true if connection was successful
00063      */
00064     bool connect();
00065 
00066     /**
00067      * read jpeg image
00068      *
00069      * @param buf read buffer 
00070      * @param size buffer size 
00071      * @param timeout_ms timeout default 15sec
00072      * @return jpeg size if read success else -1
00073      */
00074     int readJPEG(uint8_t* buf, int size, int timeout_ms = 15*1000);
00075 
00076 protected:
00077     //From IUSBEnumerator
00078     virtual void setVidPid(uint16_t vid, uint16_t pid);
00079     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
00080     virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used
00081 
00082 private:
00083     bool dev_connected;
00084 
00085     int cam_intf;
00086     bool device_found;
00087     bool caminfo_found;
00088     uint8_t _seq;
00089     uint8_t* _buf;
00090     int _pos;
00091     int _size;
00092     CamInfo* CamInfoList;
00093     CamInfo* caminfo;
00094     uint8_t _caminfo_size;
00095     uint8_t _caminfo_option;
00096 
00097     virtual void outputJPEG(uint8_t c, int status); // from decodeMJPEG
00098     void callback_motion_jpeg(uint16_t frame, uint8_t* buf, int len);
00099     void init();
00100     void onDisconnect();
00101 };