USBHostCam.h

00001 // USBHostCam.h
00002 #include "USBHostConf.h"
00003 #include "USBHost.h"
00004 #include "BaseUvc.h"
00005 #include "decodeMJPEG.h"
00006 #pragma once
00007 
00008 #define _160x120 2
00009 #define _176x144 3
00010 #define _320x176 4
00011 #define _320x240 5
00012 #define _352x288 6
00013 #define _432x240 7
00014 #define _640x480 1
00015 #define _544x288 8
00016 #define _640x360 9
00017 #define _752x416 10
00018 #define _800x448 11
00019 #define _800x600 12
00020 
00021 #define TEST_ASSERT(A) while(!(A)){fprintf(stderr,"\n\n%s@%d %s ASSERT!\n\n",__PRETTY_FUNCTION__,__LINE__,#A);exit(1);};
00022 
00023 struct CamInfo {
00024     uint16_t vid;
00025     uint16_t pid;
00026     uint8_t size;
00027     uint8_t option;
00028 //
00029     const char* name;
00030     uint8_t formatIndex;
00031     uint8_t frameIndex;
00032     uint32_t interval;
00033     uint8_t en;
00034     uint8_t mps;
00035     uint8_t if_alt;
00036     uint8_t frameCount; // ITD frame count 1-8
00037     uint8_t queueLimit; // ITD queue limit 1-3
00038 };
00039 
00040 /** 
00041  * A class to communicate a Cam
00042  */
00043 class USBHostCam : public IUSBEnumerator, public BaseUvc, public decodeMJPEG {
00044 public:
00045     /**
00046     * Constructor
00047     *
00048     */
00049     USBHostCam(uint8_t size = _160x120, uint8_t option = 0, CamInfo* user_caminfo = NULL);
00050 
00051     /**
00052     * Check if a Cam device is connected
00053     *
00054     * @return true if a Cam device is connected
00055     */
00056     bool connected();
00057  
00058     /**
00059      * Try to connect to a Cam device
00060      *
00061      * @return true if connection was successful
00062      */
00063     bool connect();
00064 
00065     /**
00066      * read jpeg image
00067      *
00068      * @param buf read buffer 
00069      * @param size buffer size 
00070      * @param timeout_ms timeout default 15sec
00071      * @return jpeg size if read success else -1
00072      */
00073     int readJPEG(uint8_t* buf, int size, int timeout_ms = 15*1000);
00074 
00075 protected:
00076     //From IUSBEnumerator
00077     virtual void setVidPid(uint16_t vid, uint16_t pid);
00078     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
00079     virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used
00080 
00081 private:
00082     bool dev_connected;
00083  
00084     int cam_intf;
00085     bool device_found;
00086     bool caminfo_found;
00087 
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 };