USBHostC270.h

00001 #include "USBHostConf.h"
00002 #include "USBHost.h"
00003 #include "BaseUvc.h"
00004 #include "decodeMJPEG.h"
00005 
00006 // Logitech C270
00007 #define C270_VID 0x046d
00008 #define C270_PID 0x0825
00009 #define C270_160x120 2
00010 #define C270_176x144 3
00011 #define C270_320x176 4
00012 #define C270_320x240 5
00013 #define C270_352x288 6
00014 #define C270_432x240 7
00015 #define C270_640x480 1
00016 #define C270_544x288 8
00017 #define C270_640x360 9
00018 #define C270_752x416 10
00019 #define C270_800x448 11
00020 #define C270_800x600 12
00021 
00022 #define C270_MJPEG 2
00023 #define C270_YUV2  1
00024 
00025 #define C270_EN  0x81
00026 #define C270_MPS  192
00027 #define C270_IF_ALT 1
00028 
00029 #define TEST_ASSERT(A) while(!(A)){fprintf(stderr,"\n\n%s@%d %s ASSERT!\n\n",__PRETTY_FUNCTION__,__LINE__,#A);exit(1);};
00030 
00031 class IsochronousEp;
00032 class BaseUvc;
00033 /** 
00034  * A class to communicate a C270
00035  */
00036 class USBHostC270 : public IUSBEnumerator, public BaseUvc, public decodeMJPEG {
00037 public:
00038     /**
00039     * Constructor
00040     *
00041     */
00042     USBHostC270(int formatIndex = C270_MJPEG, int frameIndex = C270_160x120, uint32_t interval = _5FPS);
00043 
00044     /**
00045     * Check if a C270 device is connected
00046     *
00047     * @return true if a MSD device is connected
00048     */
00049     bool connected();
00050 
00051     /**
00052      * Try to connect to a C270 device
00053      *
00054      * @return true if connection was successful
00055      */
00056     bool connect();
00057 
00058     /**
00059      * read jpeg image
00060      *
00061      * @param buf read buffer 
00062      * @param size buffer size 
00063      * @param timeout_ms timeout default 15sec
00064      * @return jpeg size if read success else -1
00065      */
00066     int readJPEG(uint8_t* buf, int size, int timeout_ms = 15*1000);
00067 
00068 protected:
00069     //From IUSBEnumerator
00070     virtual void setVidPid(uint16_t vid, uint16_t pid);
00071     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
00072     virtual bool useEndpoint(uint8_t intf_nb, ENDPOINT_TYPE type, ENDPOINT_DIRECTION dir); //Must return true if the endpoint will be used
00073 
00074 private:
00075     bool dev_connected;
00076 
00077     int c270_intf;
00078     bool c270_device_found;
00079     bool c270_vid_pid_found;
00080     int _formatIndex;
00081     int _frameIndex;
00082     uint32_t _interval;
00083     uint8_t _seq;
00084     uint8_t* _buf;
00085     int _pos;
00086     int _size;
00087 
00088     virtual void outputJPEG(uint8_t c, int status); // from decodeMJPEG
00089     void callback_motion_jpeg(uint16_t frame, uint8_t* buf, int len);
00090     void init();
00091     void onDisconnect();
00092 };