X-Git-Url: https://git.ao2.it/libam7xxx.git/blobdiff_plain/1608665f4fd202a072531ae3a582eca87b344137..2208b544c082879d7a429b50ec76c466212e4aac:/examples/picoproj.c?ds=inline diff --git a/examples/picoproj.c b/examples/picoproj.c index c3b199c..8503612 100644 --- a/examples/picoproj.c +++ b/examples/picoproj.c @@ -16,10 +16,14 @@ * along with this program. If not, see . */ +/** + * @example examples/picoproj.c + * A minimal example to show how to use libam7xxx to display a static image. + */ + #include #include #include -#include #include #include #include @@ -32,14 +36,18 @@ static void usage(char *name) printf("usage: %s [OPTIONS]\n\n", name); printf("OPTIONS:\n"); printf("\t-f \t\tthe image file to upload\n"); - printf("\t-F \t\tthe image format to use (default is JPEG).\n"); + printf("\t-F \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 \t\tthe verbosity level of libam7xxx output (0-5)\n"); + printf("\t-p \tpower level of device, between %x (off) and %x (maximum)\n", AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO); + printf("\t\t\t\tWARNING: Level 2 and greater require the master AND\n\t\t\t\t\t the slave connector to be plugged in.\n"); printf("\t-W \tthe width of the image to upload\n"); printf("\t-H \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[]) @@ -49,11 +57,12 @@ 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; + am7xxx_power_mode power_mode = AM7XXX_POWER_LOW; int format = AM7XXX_IMAGE_FORMAT_JPEG; int width = 800; int height = 480; @@ -61,9 +70,11 @@ int main(int argc, char *argv[]) unsigned int size; am7xxx_device_info device_info; - while ((opt = getopt(argc, argv, "f:F:l:W:H:h")) != -1) { + while ((opt = getopt(argc, argv, "f:F:l:p:W:H:h")) != -1) { switch (opt) { case 'f': + if (filename[0] != '\0') + fprintf(stderr, "Warning: image file already specified\n"); strncpy(filename, optarg, FILENAME_MAX); break; case 'F': @@ -87,6 +98,21 @@ int main(int argc, char *argv[]) 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: %x\n", power_mode); + break; + default: + fprintf(stderr, "Invalid power mode value, must be between %x and %x\n", AM7XXX_POWER_OFF, AM7XXX_POWER_TURBO); + exit(EXIT_FAILURE); + } + break; case 'W': width = atoi(optarg); if (width < 0) { @@ -117,31 +143,43 @@ int main(int argc, char *argv[]) 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 = 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); @@ -170,20 +208,24 @@ int main(int argc, char *argv[]) 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_power_mode(dev, power_mode); if (ret < 0) { perror("am7xxx_set_power_mode"); exit_code = EXIT_FAILURE; goto cleanup; } + if ((unsigned int)width > device_info.native_width || + (unsigned int)height > device_info.native_height) + fprintf(stderr, "WARNING: image not fitting the native resolution, it may be displayed wrongly!\n"); + ret = am7xxx_send_image(dev, format, width, height, image, size); if (ret < 0) { perror("am7xxx_send_image"); @@ -196,15 +238,13 @@ int main(int argc, char *argv[]) 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);