134 lines
3.8 KiB
C
134 lines
3.8 KiB
C
/*
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* This code released into the public domain 21 July 2008
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*
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* This program does the equivalent of:
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* gphoto2 --shell
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* > set-config capture=1
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* > capture-image-and-download
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* compile with gcc -Wall -o canon-capture -lgphoto2 canon-capture.c
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*
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* Taken from: http://credentiality2.blogspot.com/2008/07/linux-libgphoto2-image-capture-from.html
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*
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* and condensed into simple capture sample
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*/
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#include <stdlib.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <string.h>
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#include <gphoto2/gphoto2.h>
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#include "samples.h"
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static void errordumper(GPLogLevel level, const char *domain, const char *str,
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void *data) {
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fprintf(stdout, "%s\n", str);
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}
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static void
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capture_to_memory(Camera *camera, GPContext *context, const char **ptr, unsigned long int *size) {
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int retval;
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CameraFile *file;
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CameraFilePath camera_file_path;
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printf("Capturing.\n");
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/* NOP: This gets overridden in the library to /capt0000.jpg */
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strcpy(camera_file_path.folder, "/");
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strcpy(camera_file_path.name, "foo.jpg");
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retval = gp_camera_capture(camera, GP_CAPTURE_IMAGE, &camera_file_path, context);
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printf(" Retval: %d\n", retval);
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printf("Pathname on the camera: %s/%s\n", camera_file_path.folder, camera_file_path.name);
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retval = gp_file_new(&file);
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printf(" Retval: %d\n", retval);
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retval = gp_camera_file_get(camera, camera_file_path.folder, camera_file_path.name,
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GP_FILE_TYPE_NORMAL, file, context);
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printf(" Retval: %d\n", retval);
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gp_file_get_data_and_size (file, ptr, size);
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printf("Deleting.\n");
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retval = gp_camera_file_delete(camera, camera_file_path.folder, camera_file_path.name,
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context);
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printf(" Retval: %d\n", retval);
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/*gp_file_free(file); */
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}
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static void
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capture_to_file(Camera *camera, GPContext *context, char *fn) {
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int fd, retval;
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CameraFile *file;
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CameraFilePath camera_file_path;
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printf("Capturing.\n");
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/* NOP: This gets overridden in the library to /capt0000.jpg */
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strcpy(camera_file_path.folder, "/");
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strcpy(camera_file_path.name, "foo.jpg");
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retval = gp_camera_capture(camera, GP_CAPTURE_IMAGE, &camera_file_path, context);
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printf(" Retval: %d\n", retval);
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printf("Pathname on the camera: %s/%s\n", camera_file_path.folder, camera_file_path.name);
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fd = open(fn, O_CREAT | O_WRONLY | O_BINARY, 0644);
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retval = gp_file_new_from_fd(&file, fd);
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printf(" Retval: %d\n", retval);
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retval = gp_camera_file_get(camera, camera_file_path.folder, camera_file_path.name,
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GP_FILE_TYPE_NORMAL, file, context);
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printf(" Retval: %d\n", retval);
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gp_file_free(file);
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printf("Deleting.\n");
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retval = gp_camera_file_delete(camera, camera_file_path.folder, camera_file_path.name,
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context);
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printf(" Retval: %d\n", retval);
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}
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int
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main(int argc, char **argv) {
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Camera *camera;
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int retval;
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GPContext *context = sample_create_context();
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FILE *f;
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char *data;
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unsigned long size;
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gp_log_add_func(GP_LOG_ERROR, errordumper, NULL);
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gp_camera_new(&camera);
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/* When I set GP_LOG_DEBUG instead of GP_LOG_ERROR above, I noticed that the
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* init function seems to traverse the entire filesystem on the camera. This
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* is partly why it takes so long.
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* (Marcus: the ptp2 driver does this by default currently.)
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*/
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printf("Camera init. Takes about 10 seconds.\n");
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retval = gp_camera_init(camera, context);
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if (retval != GP_OK) {
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printf(" Retval of capture_to_file: %d\n", retval);
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exit (1);
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}
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capture_to_file(camera, context, "foo.jpg");
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capture_to_memory(camera, context, (const char**)&data, &size);
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f = fopen("foo2.jpg", "wb");
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if (f) {
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retval = fwrite (data, size, 1, f);
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if (retval != size) {
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printf(" fwrite size %ld, written %d\n", size, retval);
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}
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fclose(f);
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} else
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printf(" fopen foo2.jpg failed.\n");
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gp_camera_exit(camera, context);
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return 0;
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}
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