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Picture Transfer Protocol client library
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petabyt/camlib
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This is a Picture Transfer Protocol (PTP) library written in C.
(This library doesn't have a stable release yet, use at your own risk)
- Complete working implemention of PTP as per ISO 15740
- Implement PTP/IP
- Tested and working on Linux, MacOS, Windows, Android, and iOS
- Work natively on Windows witout libusb (libwpd)
- Fcuntions to convert most data structures to JSON
- Implement most EOS/Canon features
- Optional lua bindings
- Thread safety
- CI/Regression testing (vcam)
- Fujifilm support: Availablehere as libfudge
- Thread-safe
- No macros
- Uses a single in/out buffer (no memory allocations between operations)
Get device info:
#include <camlib.h>int main() {struct PtpRuntime *r = ptp_new(PTP_USB);if (ptp_device_init(r)) {printf("Device connection error\n");return 0;}struct PtpDeviceInfo di;char buffer[2048];ptp_get_device_info(r, &di);ptp_device_info_json(&di, buffer, sizeof(buffer));printf("%s\n", buffer);ptp_device_close(r);ptp_close(r);return 0;}Calling a custom opcode:
// Send a command, and recieve packet(s)struct PtpCommand cmd;cmd.code = 0x1234;cmd.param_length = 3;cmd.params[0] = 420;cmd.params[1] = 420;cmd.params[2] = 420;return ptp_send(r, &cmd);// Send a command with data payloadstruct PtpCommand cmd;cmd.code = 0x1234;cmd.param_length = 1;cmd.params[0] = 1234;uint32_t dat[2] = {123, 123};return ptp_send_data(r, &cmd, dat, sizeof(dat));Explore the filesystem:
struct PtpArray *arr;int rc = ptp_get_storage_ids(r, &arr);int id = arr->data[0];free(arr);rc = ptp_get_object_handles(r, id, PTP_OF_JPEG, 0, &arr);for (int i = 0; i < arr->length; i++) {struct PtpObjectInfo oi;ptp_get_object_info(r, arr->data[i], &oi);printf("Filename: %s\n", oi.filename);}free(arr);Camlib is licensed under the Apache License 2.0.
lua-cjson:http://tools.ietf.org/html/rfc4627 (MIT License)