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 #if 0
00023 #define TEST_ASSERT(A) while(!(A)){fprintf(stderr,"\n\n%s@%d %s ASSERT!\n\n",__PRETTY_FUNCTION__,__LINE__,#A);exit(1);};
00024 #else
00025 #define TEST_ASSERT(A) while(0)
00026 #endif
00027 
00028 
00029 struct CamInfo {
00030     uint16_t vid;
00031     uint16_t pid;
00032     uint8_t size;
00033     uint8_t option;
00034 //
00035     const char* name;
00036     uint8_t formatIndex;
00037     uint8_t frameIndex;
00038     uint32_t interval;
00039     uint8_t en;
00040     uint8_t mps;
00041     uint8_t if_alt;
00042     uint8_t frameCount; // ITD frame count 1-8
00043     uint8_t queueLimit; // ITD queue limit 1-3
00044 };
00045 
00046 /** 
00047  * A class to communicate a Cam
00048  */
00049 class USBHostCam : public IUSBEnumerator, public BaseUvc, public decodeMJPEG {
00050 public:
00051     /**
00052     * Constructor
00053     *
00054     */
00055     USBHostCam(uint8_t size = _160x120, uint8_t option = 0, CamInfo* user_caminfo = NULL);
00056 
00057     /**
00058     * Check if a Cam device is connected
00059     *
00060     * @return true if a Cam device is connected
00061     */
00062     bool connected();
00063 
00064     /**
00065      * Try to connect to a Cam device
00066      *
00067      * @return true if connection was successful
00068      */
00069     bool connect();
00070 
00071     /**
00072      * read jpeg image
00073      *
00074      * @param buf read buffer 
00075      * @param size buffer size 
00076      * @param timeout_ms timeout default 15sec
00077      * @return jpeg size if read success else -1
00078      */
00079     int readJPEG(uint8_t* buf, int size, int timeout_ms = 15*1000);
00080 
00081 protected:
00082     //From IUSBEnumerator
00083     virtual void setVidPid(uint16_t vid, uint16_t pid);
00084     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
00085     virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used
00086 
00087 private:
00088     bool dev_connected;
00089 
00090     int cam_intf;
00091     bool device_found;
00092     bool caminfo_found;
00093     uint8_t _seq;
00094     uint8_t* _buf;
00095     int _pos;
00096     int _size;
00097     CamInfo* CamInfoList;
00098     CamInfo* caminfo;
00099     uint8_t _caminfo_size;
00100     uint8_t _caminfo_option;
00101 
00102     virtual void outputJPEG(uint8_t c, int status); // from decodeMJPEG
00103     void callback_motion_jpeg(uint16_t frame, uint8_t* buf, int len);
00104     void init();
00105     void onDisconnect();
00106 };