Simple USBHost WebCam test program
Dependencies: F401RE-USBHost mbed
Fork of KL46Z-USBHostC270_example by
WebカメラからJPEG画像を読み取るテストプログラムです。
使い方はKL46Z-USBHostC270_exampleと同じです。
動作確認カメラ: Logitech C270, Logitech C210, Logitech Q200R(Qcam Orbit AF), LifeCam VX-500
KL46Z_USBHostC270/USBHostCam.cpp@1:22304b8f8395, 2014-01-28 (annotated)
- Committer:
- va009039
- Date:
- Tue Jan 28 06:54:16 2014 +0000
- Revision:
- 1:22304b8f8395
- Child:
- 2:2a40888db9fc
support Logitech C210 Q200R, LifeCam VX-700(VX-500), Sonix Camera.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
va009039 | 1:22304b8f8395 | 1 | // USBHostCam.cpp |
va009039 | 1:22304b8f8395 | 2 | #include "USBHostCam.h" |
va009039 | 1:22304b8f8395 | 3 | |
va009039 | 1:22304b8f8395 | 4 | //#define CAM_DEBUG 1 |
va009039 | 1:22304b8f8395 | 5 | #ifdef CAM_DEBUG |
va009039 | 1:22304b8f8395 | 6 | #define CAM_DBG(x, ...) std::printf("[%s:%d]"x"\r\n", __PRETTY_FUNCTION__, __LINE__, ##__VA_ARGS__); |
va009039 | 1:22304b8f8395 | 7 | #else |
va009039 | 1:22304b8f8395 | 8 | #define CAM_DBG(...) while(0); |
va009039 | 1:22304b8f8395 | 9 | #endif |
va009039 | 1:22304b8f8395 | 10 | #define CAM_INFO(...) do{fprintf(stderr,__VA_ARGS__);}while(0); |
va009039 | 1:22304b8f8395 | 11 | |
va009039 | 1:22304b8f8395 | 12 | CamInfo* getCamInfoList(); // CamInfo.cpp |
va009039 | 1:22304b8f8395 | 13 | |
va009039 | 1:22304b8f8395 | 14 | USBHostCam::USBHostCam(uint8_t size, uint8_t option, CamInfo* user_caminfo) |
va009039 | 1:22304b8f8395 | 15 | { |
va009039 | 1:22304b8f8395 | 16 | CAM_DBG("size: %d, option: %d", size, option); |
va009039 | 1:22304b8f8395 | 17 | _caminfo_size = size; |
va009039 | 1:22304b8f8395 | 18 | _caminfo_option = option; |
va009039 | 1:22304b8f8395 | 19 | if (user_caminfo) { |
va009039 | 1:22304b8f8395 | 20 | CamInfoList = user_caminfo; |
va009039 | 1:22304b8f8395 | 21 | } else { |
va009039 | 1:22304b8f8395 | 22 | CamInfoList = getCamInfoList(); |
va009039 | 1:22304b8f8395 | 23 | } |
va009039 | 1:22304b8f8395 | 24 | clearOnResult(); |
va009039 | 1:22304b8f8395 | 25 | host = USBHost::getHostInst(); |
va009039 | 1:22304b8f8395 | 26 | setup(); |
va009039 | 1:22304b8f8395 | 27 | } |
va009039 | 1:22304b8f8395 | 28 | |
va009039 | 1:22304b8f8395 | 29 | void USBHostCam::setup() { |
va009039 | 1:22304b8f8395 | 30 | caminfo = CamInfoList; |
va009039 | 1:22304b8f8395 | 31 | bool found = false; |
va009039 | 1:22304b8f8395 | 32 | while(caminfo->vid != 0) { |
va009039 | 1:22304b8f8395 | 33 | if (caminfo->vid == host->dev.vid && caminfo->pid == host->dev.pid && |
va009039 | 1:22304b8f8395 | 34 | caminfo->size == _caminfo_size && caminfo->option == _caminfo_option) { |
va009039 | 1:22304b8f8395 | 35 | found = true; |
va009039 | 1:22304b8f8395 | 36 | break; |
va009039 | 1:22304b8f8395 | 37 | } |
va009039 | 1:22304b8f8395 | 38 | caminfo++; |
va009039 | 1:22304b8f8395 | 39 | } |
va009039 | 1:22304b8f8395 | 40 | if (!found) { |
va009039 | 1:22304b8f8395 | 41 | CAM_INFO("caminfo not found.\n"); |
va009039 | 1:22304b8f8395 | 42 | exit(1); |
va009039 | 1:22304b8f8395 | 43 | } |
va009039 | 1:22304b8f8395 | 44 | CAM_INFO("Found: %s\n", caminfo->name); |
va009039 | 1:22304b8f8395 | 45 | |
va009039 | 1:22304b8f8395 | 46 | ep_iso_in.setAddress(caminfo->en); |
va009039 | 1:22304b8f8395 | 47 | ep_iso_in.setSize(caminfo->mps); |
va009039 | 1:22304b8f8395 | 48 | uint8_t buf[26]; |
va009039 | 1:22304b8f8395 | 49 | memset(buf, 0, sizeof(buf)); |
va009039 | 1:22304b8f8395 | 50 | buf[2] = caminfo->formatIndex; |
va009039 | 1:22304b8f8395 | 51 | buf[3] = caminfo->frameIndex; |
va009039 | 1:22304b8f8395 | 52 | *reinterpret_cast<uint32_t*>(buf+4) = caminfo->interval; |
va009039 | 1:22304b8f8395 | 53 | USB_TYPE res = Control(SET_CUR, VS_COMMIT_CONTROL, 1, buf, sizeof(buf)); |
va009039 | 1:22304b8f8395 | 54 | if (res != USB_TYPE_OK) { |
va009039 | 1:22304b8f8395 | 55 | CAM_DBG("SET_CUR VS_COMMIT_CONTROL FAILED"); |
va009039 | 1:22304b8f8395 | 56 | } |
va009039 | 1:22304b8f8395 | 57 | res = setInterfaceAlternate(1, caminfo->if_alt); |
va009039 | 1:22304b8f8395 | 58 | if (res != USB_TYPE_OK) { |
va009039 | 1:22304b8f8395 | 59 | CAM_DBG("SET_INTERFACE FAILED"); |
va009039 | 1:22304b8f8395 | 60 | } |
va009039 | 1:22304b8f8395 | 61 | } |
va009039 | 1:22304b8f8395 | 62 | |
va009039 | 1:22304b8f8395 | 63 | #define SEQ_READ_IDOL 0 |
va009039 | 1:22304b8f8395 | 64 | #define SEQ_READ_EXEC 1 |
va009039 | 1:22304b8f8395 | 65 | #define SEQ_READ_DONE 2 |
va009039 | 1:22304b8f8395 | 66 | |
va009039 | 1:22304b8f8395 | 67 | int USBHostCam::readJPEG(uint8_t* buf, int size, int timeout_ms) { |
va009039 | 1:22304b8f8395 | 68 | _buf = buf; |
va009039 | 1:22304b8f8395 | 69 | _pos = 0; |
va009039 | 1:22304b8f8395 | 70 | _size = size; |
va009039 | 1:22304b8f8395 | 71 | _seq = SEQ_READ_IDOL; |
va009039 | 1:22304b8f8395 | 72 | setOnResult(this, &USBHostCam::callback_motion_jpeg); |
va009039 | 1:22304b8f8395 | 73 | Timer timeout_t; |
va009039 | 1:22304b8f8395 | 74 | timeout_t.reset(); |
va009039 | 1:22304b8f8395 | 75 | timeout_t.start(); |
va009039 | 1:22304b8f8395 | 76 | while(timeout_t.read_ms() < timeout_ms && _seq != SEQ_READ_DONE) { |
va009039 | 1:22304b8f8395 | 77 | poll(); |
va009039 | 1:22304b8f8395 | 78 | } |
va009039 | 1:22304b8f8395 | 79 | return _pos; |
va009039 | 1:22304b8f8395 | 80 | } |
va009039 | 1:22304b8f8395 | 81 | |
va009039 | 1:22304b8f8395 | 82 | /* virtual */ void USBHostCam::outputJPEG(uint8_t c, int status) { // from decodeMJPEG |
va009039 | 1:22304b8f8395 | 83 | if (_seq == SEQ_READ_IDOL) { |
va009039 | 1:22304b8f8395 | 84 | if (status == JPEG_START) { |
va009039 | 1:22304b8f8395 | 85 | _pos = 0; |
va009039 | 1:22304b8f8395 | 86 | _seq = SEQ_READ_EXEC; |
va009039 | 1:22304b8f8395 | 87 | } |
va009039 | 1:22304b8f8395 | 88 | } |
va009039 | 1:22304b8f8395 | 89 | if (_seq == SEQ_READ_EXEC) { |
va009039 | 1:22304b8f8395 | 90 | if (_pos < _size) { |
va009039 | 1:22304b8f8395 | 91 | _buf[_pos++] = c; |
va009039 | 1:22304b8f8395 | 92 | } |
va009039 | 1:22304b8f8395 | 93 | if (status == JPEG_END) { |
va009039 | 1:22304b8f8395 | 94 | _seq = SEQ_READ_DONE; |
va009039 | 1:22304b8f8395 | 95 | } |
va009039 | 1:22304b8f8395 | 96 | } |
va009039 | 1:22304b8f8395 | 97 | } |
va009039 | 1:22304b8f8395 | 98 | |
va009039 | 1:22304b8f8395 | 99 | void USBHostCam::callback_motion_jpeg(uint16_t frame, uint8_t* buf, int len) { |
va009039 | 1:22304b8f8395 | 100 | inputPacket(buf, len); |
va009039 | 1:22304b8f8395 | 101 | } |