* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+/**
+ * @example examples/picoproj.c
+ * A minimal example to show how to use libam7xxx to display a static image.
+ */
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <sys/mman.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
{
printf("usage: %s [OPTIONS]\n\n", name);
printf("OPTIONS:\n");
+ printf("\t-d <index>\t\tthe device index (default is 0)\n");
printf("\t-f <filename>\t\tthe image file to upload\n");
- printf("\t-F <format>\t\tthe image format to use (default is JPEG).\n");
+ printf("\t-F <format>\t\tthe image format to use (default is JPEG)\n");
printf("\t\t\t\tSUPPORTED FORMATS:\n");
printf("\t\t\t\t\t1 - JPEG\n");
- printf("\t\t\t\t\t2 - YUV - NV12\n");
+ printf("\t\t\t\t\t2 - NV12\n");
printf("\t-l <log level>\t\tthe verbosity level of libam7xxx output (0-5)\n");
+ printf("\t-p <power mode>\t\tthe power mode of device, between %d (off) and %d (turbo)\n",
+ AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
+ printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n");
+ printf("\t\t\t\t the slave connector to be plugged in.\n");
+ printf("\t-z <zoom mode>\t\tthe display zoom mode, between %d (original) and %d (test)\n",
+ AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TEST);
printf("\t-W <image width>\tthe width of the image to upload\n");
printf("\t-H <image height>\tthe height of the image to upload\n");
printf("\t-h \t\t\tthis help message\n");
+ printf("\n\nEXAMPLE OF USE:\n");
+ printf("\t%s -f file.jpg -F 1 -l 5 -W 800 -H 480\n", name);
}
int main(int argc, char *argv[])
int opt;
char filename[FILENAME_MAX] = {0};
- int image_fd;
+ FILE *image_fp;
struct stat st;
am7xxx_context *ctx;
am7xxx_device *dev;
int log_level = AM7XXX_LOG_INFO;
+ int device_index = 0;
+ int power_mode = AM7XXX_POWER_LOW;
+ int zoom = AM7XXX_ZOOM_ORIGINAL;
int format = AM7XXX_IMAGE_FORMAT_JPEG;
int width = 800;
int height = 480;
unsigned char *image;
- unsigned int size;
+ off_t size;
am7xxx_device_info device_info;
- while ((opt = getopt(argc, argv, "f:F:l:W:H:h")) != -1) {
+ while ((opt = getopt(argc, argv, "d:f:F:l:p:z:W:H:h")) != -1) {
switch (opt) {
+ case 'd':
+ device_index = atoi(optarg);
+ if (device_index < 0) {
+ fprintf(stderr, "Unsupported device index\n");
+ exit(EXIT_FAILURE);
+ }
+ break;
case 'f':
+ if (filename[0] != '\0')
+ fprintf(stderr, "Warning: image file already specified\n");
strncpy(filename, optarg, FILENAME_MAX);
break;
case 'F':
log_level = AM7XXX_LOG_ERROR;
}
break;
+ case 'p':
+ power_mode = atoi(optarg);
+ switch(power_mode) {
+ case AM7XXX_POWER_OFF:
+ case AM7XXX_POWER_LOW:
+ case AM7XXX_POWER_MIDDLE:
+ case AM7XXX_POWER_HIGH:
+ case AM7XXX_POWER_TURBO:
+ fprintf(stdout, "Power mode: %d\n", power_mode);
+ break;
+ default:
+ fprintf(stderr, "Invalid power mode value, must be between %d and %d\n",
+ AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO);
+ exit(EXIT_FAILURE);
+ }
+ break;
+ case 'z':
+ zoom = atoi(optarg);
+ switch(zoom) {
+ case AM7XXX_ZOOM_ORIGINAL:
+ case AM7XXX_ZOOM_H:
+ case AM7XXX_ZOOM_H_V:
+ case AM7XXX_ZOOM_TEST:
+ fprintf(stdout, "Zoom: %d\n", zoom);
+ break;
+ default:
+ fprintf(stderr, "Invalid zoom mode value, must be between %d and %d\n",
+ AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TEST);
+ exit(EXIT_FAILURE);
+ }
+ break;
case 'W':
width = atoi(optarg);
if (width < 0) {
case 'h':
usage(argv[0]);
exit(EXIT_SUCCESS);
- break;
default: /* '?' */
usage(argv[0]);
exit(EXIT_FAILURE);
}
if (filename[0] == '\0') {
- fprintf(stderr, "An image file MUST be specified.\n");
+ fprintf(stderr, "An image file MUST be specified with the -f option.\n\n");
+ usage(argv[0]);
exit_code = EXIT_FAILURE;
goto out;
}
- image_fd = open(filename, O_RDONLY);
- if (image_fd < 0) {
- perror("open");
+ image_fp = fopen(filename, "rb");
+ if (image_fp == NULL) {
+ perror("fopen");
exit_code = EXIT_FAILURE;
goto out;
}
- if (fstat(image_fd, &st) < 0) {
+ if (fstat(fileno(image_fp), &st) < 0) {
perror("fstat");
exit_code = EXIT_FAILURE;
- goto out_close_image_fd;
+ goto out_close_image_fp;
}
size = st.st_size;
- image = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, image_fd, 0);
+ image = malloc(size * sizeof(unsigned char));
if (image == NULL) {
- perror("mmap");
+ perror("malloc");
exit_code = EXIT_FAILURE;
- goto out_close_image_fd;
+ goto out_close_image_fp;
+ }
+
+ ret = (int)fread(image, size, 1, image_fp);
+ if (ret != 1) {
+ if (feof(image_fp))
+ fprintf(stderr, "Unexpected end of file.\n");
+ else if (ferror(image_fp))
+ perror("fread");
+ else
+ fprintf(stderr, "Unexpected error condition.\n");
+
+ goto out_free_image;
}
ret = am7xxx_init(&ctx);
if (ret < 0) {
perror("am7xxx_init");
exit_code = EXIT_FAILURE;
- goto out_munmap;
+ goto out_free_image;
}
am7xxx_set_log_level(ctx, log_level);
goto cleanup;
}
-
ret = am7xxx_close_device(dev);
if (ret < 0) {
perror("am7xxx_close_device");
goto cleanup;
}
- ret = am7xxx_open_device(ctx, &dev, 0);
+ ret = am7xxx_open_device(ctx, &dev, device_index);
if (ret < 0) {
perror("am7xxx_open_device");
exit_code = EXIT_FAILURE;
ret = am7xxx_get_device_info(dev, &device_info);
if (ret < 0) {
- perror("am7xxx_get_info");
+ perror("am7xxx_get_device_info");
exit_code = EXIT_FAILURE;
goto cleanup;
}
printf("Native resolution: %dx%d\n",
device_info.native_width, device_info.native_height);
- ret = am7xxx_set_power_mode(dev, AM7XXX_POWER_LOW);
+ ret = am7xxx_set_zoom_mode(dev, zoom);
+ if (ret < 0) {
+ perror("am7xxx_set_zoom_mode");
+ exit_code = EXIT_FAILURE;
+ goto cleanup;
+ }
+
+ ret = am7xxx_set_power_mode(dev, power_mode);
if (ret < 0) {
perror("am7xxx_set_power_mode");
exit_code = EXIT_FAILURE;
goto cleanup;
}
- ret = am7xxx_send_image(dev, format, width, height, image, size);
+ /* When setting AM7XXX_ZOOM_TEST don't display the actual image */
+ if (zoom == AM7XXX_ZOOM_TEST) {
+ printf("AM7XXX_ZOOM_TEST requested, not sending actual image.\n");
+ goto cleanup;
+ }
+
+ if ((unsigned int)width > device_info.native_width ||
+ (unsigned int)height > device_info.native_height)
+ fprintf(stderr,
+ "WARNING: image is %dx%d, not fitting the native resolution, it may be displayed wrongly!\n",
+ width, height);
+
+ ret = am7xxx_send_image(dev, format, width, height, image, (unsigned int)size);
if (ret < 0) {
perror("am7xxx_send_image");
exit_code = EXIT_FAILURE;
cleanup:
am7xxx_shutdown(ctx);
-out_munmap:
- ret = munmap(image, size);
- if (ret < 0)
- perror("munmap");
+out_free_image:
+ free(image);
-out_close_image_fd:
- ret = close(image_fd);
- if (ret < 0)
- perror("close");
+out_close_image_fp:
+ ret = fclose(image_fp);
+ if (ret == EOF)
+ perror("fclose");
out:
exit(exit_code);
projects / libam7xxx.git / blobdiff