File content as of revision 6:cf06ba884429:

#include "mbed.h"
#include "uvc.h"
#define __DEBUG
#include "mydbg.h"
#include "stcamcfg.h"
#include "Utils.h"

#define  DESCRIPTOR_TYPE_DEVICE        1
#define  DESCRIPTOR_TYPE_CONFIGURATION 2
#define  DESCRIPTOR_TYPE_STRING        3
#define  DESCRIPTOR_TYPE_INTERFACE     4
#define  DESCRIPTOR_TYPE_ENDPOINT      5

#define DESCRIPTOR_TYPE_INTERFACE_ASSOCIATION 0x0b

#define DESCRIPTOR_TYPE_HID          0x21
#define DESCRIPTOR_TYPE_REPORT       0x22
#define DESCRIPTOR_TYPE_PHYSICAL     0x23
#define DESCRIPTOR_TYPE_CS_INTERFACE 0x24
#define DESCRIPTOR_TYPE_CS_ENDPOINT  0x25
#define DESCRIPTOR_TYPE_HUB          0x29

#define CLASS_AUDIO 0x02
#define CLASS_HUB   0x09

#define IF_EQ_THEN_PRINTF(A,B) if (A == B) {VERBOSE("%s\n", #A);
#define ENDIF }

#define AC_HEADER          0x01
#define AC_INPUT_TERMINAL  0x02
#define AC_OUTPUT_TERMINAL 0x03
#define AC_FEATURE_UNIT    0x06

// Input Terminal Types
#define ITT_CAMERA 0x0201


void _parserAudioControl(uint8_t* buf, int len) {
    int subtype = buf[2];
    IF_EQ_THEN_PRINTF(AC_HEADER, subtype)
    VERBOSE("ADC: %04x\n", LE16(buf+3));
    VERBOSE("TotalLength: %d\n", LE16(buf+5));
    VERBOSE("InCollection: %d\n", buf[7]);
    for (int n = 1; n <= buf[7]; n++) {
        VERBOSE("aInterfaceNr(%d): %d\n", n, buf[8+n-1]);
    }
    ENDIF
    IF_EQ_THEN_PRINTF(AC_INPUT_TERMINAL, subtype)
    VERBOSE("TerminalID: %d\n", buf[3]);
    VERBOSE("TerminalType: %04X\n", LE16(buf+4));
    VERBOSE("AssocTermianl: %d\n", buf[6]);
    VERBOSE("NrChannels: %d\n", buf[7]);
    ENDIF
    IF_EQ_THEN_PRINTF(AC_OUTPUT_TERMINAL, subtype)
    VERBOSE("TerminalID: %d\n", buf[3]);
    VERBOSE("TerminalType: %04X\n", LE16(buf+4));
    VERBOSE("AssocTermianl: %d\n", buf[6]);
    ENDIF
    IF_EQ_THEN_PRINTF(AC_FEATURE_UNIT, subtype)
    VERBOSE("UnitID: %d\n", buf[3]);
    VERBOSE("SourceID: %d\n", buf[4]);
    VERBOSE("ControlSize: %d\n", buf[5]);
    ENDIF
}

#define AS_GENERAL     0x01
#define AS_FORMAT_TYPE 0x02

void _parserAudioStream(uint8_t* buf, int len) {
    int subtype = buf[2];
    IF_EQ_THEN_PRINTF(AS_GENERAL, subtype)
    VERBOSE("TerminalLink: %d\n", buf[3]);
    VERBOSE("Delay: %d\n", buf[4]);
    VERBOSE("FormatTag: %04x\n", LE16(buf+5));
    ENDIF
    IF_EQ_THEN_PRINTF(AS_FORMAT_TYPE, subtype)
    VERBOSE("FormatType: %d\n", buf[3]);
    VERBOSE("NrChannels: %d\n", buf[4]);
    VERBOSE("SubFrameSize: %d\n", buf[5]);
    VERBOSE("BitResolution: %d\n", buf[6]);
    VERBOSE("SamFreqType: %d\n", buf[7]);
    VERBOSE("SamFreq(1): %d\n", LE24(buf+8));
    ENDIF
}

#define CC_VIDEO 0x0e

#define SC_VIDEOCONTROL   0x01
#define SC_VIDEOSTREAMING 0x02

#define VC_HEADER          0x01
#define VC_INPUT_TERMINAL  0x02
#define VC_OUTPUT_TERMINAL 0x03
#define VC_SELECTOR_UNIT   0x04
#define VC_PROCESSING_UNIT 0x05
#define VC_EXTENSION_UNIT  0x06

void _parserVideoControl(uint8_t* buf, int len) {
    int subtype = buf[2];
    IF_EQ_THEN_PRINTF(VC_HEADER, subtype)
        VERBOSE("UVC: %04x\n", LE16(buf+3));
        VERBOSE("TotalLength: %d\n", LE16(buf+5));
        VERBOSE("ClockFrequency: %d\n", LE32(buf+7));
        VERBOSE("InCollection: %d\n", buf[11]);
        VERBOSE("aInterfaceNr(1): %d\n", buf[12]);
    ENDIF
    IF_EQ_THEN_PRINTF(VC_INPUT_TERMINAL, subtype)
        VERBOSE("TerminalID: %d\n", buf[3]);
        uint16_t tt = LE16(buf+4);
        VERBOSE("TerminalType: %04X\n", tt);
        VERBOSE("AssocTerminal: %d\n", buf[6]);
        VERBOSE("Terminal: %d\n", buf[7]);
        if (tt == ITT_CAMERA) { // camera
            int bControlSize = buf[14];
            VERBOSE("ControlSize: %d\n", bControlSize);
            for(int i = 0; i < bControlSize; i++) {
            uint8_t bControls = buf[15+i];
                VERBOSE("Controls(%d): %02X\n", i, bControls); 
            }
        }
    ENDIF
    IF_EQ_THEN_PRINTF(VC_OUTPUT_TERMINAL, subtype)
        VERBOSE("TerminalID: %d\n", buf[3]);
        VERBOSE("TerminalType: %04X\n", LE16(buf+4));
        VERBOSE("AssocTerminal: %d\n", buf[6]);
        VERBOSE("SourceID: %d\n", buf[7]);
        VERBOSE("Terminal: %d\n", buf[8]);
    ENDIF
    IF_EQ_THEN_PRINTF(VC_SELECTOR_UNIT, subtype)
        VERBOSE("UnitID: %d\n", buf[3]);
    ENDIF
    IF_EQ_THEN_PRINTF(VC_PROCESSING_UNIT, subtype)
        VERBOSE("UnitID: %d\n", buf[3]);
        VERBOSE("SourceID: %d\n", buf[4]);
        VERBOSE("MaxMultiplier: %d\n", LE16(buf+5));
        VERBOSE("ControlSize: %d\n", buf[7]);
        int pos = 8;
        for (int n = 1; n <= buf[7]; n++) {
            VERBOSE("Controls(%d): %02X\n", n , buf[pos]);
            pos++;
        }
        VERBOSE("Processing: %d\n", buf[pos]);
        pos++;
        VERBOSE("VideoStanders: %02X\n", buf[pos]);
    ENDIF
    IF_EQ_THEN_PRINTF(VC_EXTENSION_UNIT, subtype)
        VERBOSE("UnitID: %d\n", buf[3]);
    ENDIF
}

#define VS_INPUT_HEADER 0x01
#define VS_STILL_FRAME  0x03
#define VS_FORMAT_UNCOMPRESSED 0x04
#define VS_FRAME_UNCOMPRESSED 0x05
#define VS_FORMAT_MJPEG 0x06
#define VS_FRAME_MJPEG  0x07
#define VS_COLOR_FORMAT 0x0d

void _parserVideoStream(struct stcamcfg* cfg, uint8_t* buf, int len) {
    int subtype = buf[2];
    IF_EQ_THEN_PRINTF(VS_INPUT_HEADER, subtype)
        VERBOSE("NumFormats: %d\n", buf[3]);
        VERBOSE("TotalLength: %d\n", LE16(buf+4));
        VERBOSE("EndpointAddress: %02X\n", buf[6]);
        VERBOSE("Info: %02X\n", buf[7]);
        VERBOSE("TerminalLink: %d\n", buf[8]);
        VERBOSE("StillCaptureMethod: %d\n", buf[9]);
        VERBOSE("TriggerSupport: %d\n", buf[10]);
        VERBOSE("TriggerUsage: %d\n", buf[11]);
        VERBOSE("ControlSize: %d\n", buf[12]);
        int pos = 13;
        for (int n = 1; n <= buf[12]; n++) {
            VERBOSE("Controls(%d): %02X\n", n, buf[pos]);
            pos++;
        }
        cfg->bEndpointAddress = buf[6];
    ENDIF
    IF_EQ_THEN_PRINTF(VS_STILL_FRAME, subtype)
    VERBOSE("EndpointAdress: %02X\n", buf[3]);
    VERBOSE("NumImageSizePatterns: %d\n", buf[4]);
    int ptn = buf[4];
    int pos = 5;
    for (int n = 1; n <= ptn; n++) {
        VERBOSE("Width(%d): %d\n", n, LE16(buf+pos));
        VERBOSE("Height(%d): %d\n", n, LE16(buf+pos+2));
        pos += 4;
    }
    VERBOSE("NumCompressPtn: %d\n", buf[pos]);
    ptn = buf[pos++];
    for (int n = 1; n <= ptn; n++) {
        VERBOSE("Compress(%d): %d\n", n, buf[pos]);
        pos++;
    }
    ENDIF
    IF_EQ_THEN_PRINTF(VS_FORMAT_UNCOMPRESSED, subtype)
        VERBOSE("FormatIndex: %d\n", buf[3]);
        VERBOSE("NumFrameDescriptors: %d\n", buf[4]);
        uint32_t guid = LE32(buf+5);
        if (guid == 0x32595559) {
            VERBOSE("GUID: YUY2\n");
        } else if (guid == 0x3231564e) {
            VERBOSE("GUID: NV12\n");
        } else {
            VERBOSE("GUID: %08x\n", guid);
        }
        VERBOSE("DefaultFrameIndex: %d\n", buf[22]);
        if (cfg->payload == PAYLOAD_YUY2) {
            cfg->FormatIndex = buf[3];
        }
    ENDIF
    IF_EQ_THEN_PRINTF(VS_FRAME_UNCOMPRESSED, subtype)
        VERBOSE("FrameIndex: %d\n", buf[3]);
        VERBOSE("Capabilites: %d\n", buf[4]);
        VERBOSE("Width: %d\n", LE16(buf+5));
        VERBOSE("Height: %d\n", LE16(buf+7));
        VERBOSE("MinBitRate: %d\n", LE32(buf+9));
        VERBOSE("MaxBitRate: %d\n", LE32(buf+13));
        VERBOSE("MaxVideoFrameBufferSize: %d\n", LE32(buf+17));
        VERBOSE("DefaultFrameInterval: %d\n", LE32(buf+21));
        VERBOSE("FrameIntervalType: %d\n", buf[25]);
        int it = buf[25];
        uint32_t max_fi = 333333; // 30.0fps
        if (it == 0) {
            VERBOSE("FrameMinInterval: %d\n", buf[26]);
            VERBOSE("FrameMaxInterval: %d\n", buf[30]);
            VERBOSE("FrameIntervalStep: %d\n", buf[34]);
        } else {
            int pos = 26;
            for (int n = 1; n <= it; n++) {
                uint32_t fi = LE32(buf+pos);
                if (fi >= max_fi) {
                    max_fi = fi;
                }
                float fps = 1e+7 / fi;
                VERBOSE("FrameInterval(%u): %d (%.1f fps)\n", n, fi, fps);
                pos += 4;
            }
        }
        if (cfg->payload == PAYLOAD_YUY2) {
            if (cfg->width == LE16(buf+5) && cfg->height == LE16(buf+7)) {
                cfg->FrameIndex = buf[3];
            }
            if (cfg->dwFrameInterval == 0) {
                cfg->dwFrameInterval = max_fi;
            }
        }
    ENDIF
    IF_EQ_THEN_PRINTF(VS_FORMAT_MJPEG, subtype)
        VERBOSE("FormatIndex: %d\n", buf[3]);
        VERBOSE("NumFrameDescriptors: %d\n", buf[4]);
        VERBOSE("Flags: %d\n", buf[5]);
        VERBOSE("DefaultFrameIndex: %d\n", buf[6]);
        if (cfg->payload == PAYLOAD_MJPEG) {
            cfg->FormatIndex = buf[3];
        }
    ENDIF
    IF_EQ_THEN_PRINTF(VS_FRAME_MJPEG, subtype)
        VERBOSE("FrameIndex: %d\n", buf[3]);
        VERBOSE("Capabilites: %d\n", buf[4]);
        VERBOSE("Width: %d\n", LE16(buf+5));
        VERBOSE("Height: %d\n", LE16(buf+7));
        VERBOSE("MinBitRate: %d\n", LE32(buf+9));
        VERBOSE("MaxBitRate: %d\n", LE32(buf+13));
        VERBOSE("MaxVideoFrameBufferSize: %d\n", LE32(buf+17));
        VERBOSE("DefaultFrameInterval: %d\n", LE32(buf+21));
        VERBOSE("FrameIntervalType: %d\n", buf[25]);
        int it = buf[25];
        uint32_t max_fi = 333333; // 30.0fps
        if (it == 0) {
            VERBOSE("FrameMinInterval: %d\n", buf[26]);
            VERBOSE("FrameMaxInterval: %d\n", buf[30]);
            VERBOSE("FrameIntervalStep: %d\n", buf[34]);
        } else {
            int pos = 26;
            for (int n = 1; n <= it; n++) {
                uint32_t fi = LE32(buf+pos);
                if (fi >= max_fi) {
                    max_fi = fi;
                }
                float fps = 1e+7 / fi;
                VERBOSE("FrameInterval(%u): %d (%.1f fps)\n", n, fi, fps);
                pos += 4;
            }
        }
        if (cfg->payload == PAYLOAD_MJPEG) {
            if (cfg->width == LE16(buf+5) && cfg->height == LE16(buf+7)) {
                cfg->FrameIndex = buf[3];
            }
            if (cfg->dwFrameInterval == 0) {
                cfg->dwFrameInterval = max_fi;
            }
        }
    ENDIF
    IF_EQ_THEN_PRINTF(VS_COLOR_FORMAT, subtype)
    ENDIF
}

void _parserConfigurationDescriptor(struct stcamcfg* cfg, uint8_t* buf, int len) {
    //DBG("buf=%p len=%d\n", buf, len);
    //DBG_HEX(buf, len);
    int pos = 0;
    cfg->_IfClass = 0;
    cfg->_IfSubClass = 0;
    while (pos < len) {
        int type = buf[pos+1];
        //DBG_BYTES(TYPE_Str(type), buf+pos, buf[pos]);
        IF_EQ_THEN_PRINTF(DESCRIPTOR_TYPE_CONFIGURATION, type)
            VERBOSE("NumInterfaces: %d\n", buf[pos+4]);
        ENDIF
        IF_EQ_THEN_PRINTF(DESCRIPTOR_TYPE_INTERFACE_ASSOCIATION, type)
            VERBOSE("FirstInterface: %d\n", buf[pos+2]);
            VERBOSE("InterfaceCount: %d\n", buf[pos+3]);
            VERBOSE("FunctionClass: %02X\n", buf[pos+4]);
            VERBOSE("FunctionSubClass: %02X\n", buf[pos+5]);
            VERBOSE("FunctionProtocol: %02X\n", buf[pos+6]);
            VERBOSE("Function: %d\n", buf[pos+7]);
        ENDIF
        IF_EQ_THEN_PRINTF(DESCRIPTOR_TYPE_INTERFACE,type)
            VERBOSE("InterfaceNumber: %d\n", buf[pos+2]);
            VERBOSE("AlternateSetting: %d\n", buf[pos+3]);
            VERBOSE("NumEndpoint: %d\n", buf[pos+4]);
            VERBOSE("InterfaceClass: %02X\n", buf[pos+5]);
            VERBOSE("InterfaceSubClass: %02X\n", buf[pos+6]);
            VERBOSE("InterfaceProtocol: %02X\n", buf[pos+7]);
            VERBOSE("Interface: %d\n", buf[pos+8]);
            cfg->_If         = buf[pos+2];
            cfg->_Ifalt      = buf[pos+3];
            cfg->_IfClass    = buf[pos+5];
            cfg->_IfSubClass = buf[pos+6];
        ENDIF
        IF_EQ_THEN_PRINTF(DESCRIPTOR_TYPE_ENDPOINT, type)
            VERBOSE("EndpointAddress: %02X\n", buf[pos+2]);
            VERBOSE("Attributes: %02X\n", buf[pos+3]);
            VERBOSE("MaxPacketSize: %d\n", LE16(buf+pos+4));
            VERBOSE("Interval: %d\n", buf[pos+6]);
            if (cfg->_IfClass == CC_VIDEO && cfg->_IfSubClass == SC_VIDEOSTREAMING) {
                if (cfg->bEndpointAddress == buf[pos+2]) {
                    if (cfg->wMaxPacketSize == 0) {
                        cfg->wMaxPacketSize = LE16(buf+pos+4);
                    }    
                    if (cfg->wMaxPacketSize == LE16(buf+pos+4)) {
                        cfg->bInterface = cfg->_If;
                        cfg->bAlternate = cfg->_Ifalt;
                    }
                }
            }
        ENDIF
        IF_EQ_THEN_PRINTF(DESCRIPTOR_TYPE_CS_INTERFACE, type)
            IF_EQ_THEN_PRINTF(CC_VIDEO, cfg->_IfClass)
                IF_EQ_THEN_PRINTF(SC_VIDEOCONTROL, cfg->_IfSubClass)
                    _parserVideoControl(buf+pos, buf[pos]);
                ENDIF
                IF_EQ_THEN_PRINTF(SC_VIDEOSTREAMING, cfg->_IfSubClass)
                    _parserVideoStream(cfg, buf+pos, buf[pos]);
                ENDIF
            ENDIF
            if (cfg->_IfClass == CLASS_AUDIO) {
                if (cfg->_IfSubClass == 0x01) {
                    _parserAudioControl(buf+pos, buf[pos]);
                } else if (cfg->_IfSubClass == 0x02) {
                    _parserAudioStream(buf+pos, buf[pos]);
                }
            }
        ENDIF
        IF_EQ_THEN_PRINTF(DESCRIPTOR_TYPE_HUB, type)
        ENDIF
        pos += buf[pos];
    }
}

void uvc::_config(struct stcamcfg* cfg)
{
    DBG_ASSERT(cfg);
    int index = 0;
    uint8_t temp[4];
    int rc = m_pDev->GetDescriptor(USB_DESCRIPTOR_TYPE_CONFIGURATION, index, temp, sizeof(temp));
    DBG_ASSERT(rc == USBERR_OK);
    DBG_BYTES("Config Descriptor 4bytes", temp, sizeof(temp));
    DBG_ASSERT(temp[0] == 9);
    DBG_ASSERT(temp[1] == 0x02);
    int TotalLength = LE16(temp+2);
    DBG("TotalLength: %d\n", TotalLength);

    uint8_t* buf = new uint8_t[TotalLength];
    DBG_ASSERT(buf);
    rc = m_pDev->GetDescriptor(USB_DESCRIPTOR_TYPE_CONFIGURATION, index, 
             buf, TotalLength);
    DBG_ASSERT(rc == USBERR_OK);

    _parserConfigurationDescriptor(cfg, buf, TotalLength);

    DBG("cfg->FrameIndex=%d\n", cfg->FrameIndex);
    DBG("cfg->dwFrameInterval=%u\n", cfg->dwFrameInterval);

    //DBG_ASSERT(cfg->FormatIndex >= 1);
    //DBG_ASSERT(cfg->FormatIndex <= 2);
    //DBG_ASSERT(cfg->FrameIndex >= 1);
    //DBG_ASSERT(cfg->FrameIndex <= 6);

    delete[] buf;
}