debian/libam7xxx-dev.install: static library libam7xxx.a

[libam7xxx.git] / examples / picoproj.c

diff --git a/examples/picoproj.c b/examples/picoproj.c
index c3b199c..2069799 100644 (file)
--- a/examples/picoproj.c
+++ b/examples/picoproj.c
@@ -1,10 +1,10 @@
 /* picoproj - test program for libam7xxx
  *
 /* picoproj - test program for libam7xxx
  *

- * Copyright (C) 2012  Antonio Ospite <ospite@studenti.unina.it>
+ * Copyright (C) 2012-2014  Antonio Ospite <ao2@ao2.it>

  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by

- * the Free Software Foundation, either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or

  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,


@@ -16,14 +16,19 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
  * 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 <stdio.h>
 #include <stdlib.h>
 #include <string.h>

-#include <sys/mman.h>

 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
 #include <unistd.h>

+#include <errno.h>

 
 #include "am7xxx.h"
 
 
 #include "am7xxx.h"
 


@@ -31,39 +36,60 @@ static void usage(char *name)
 {
        printf("usage: %s [OPTIONS]\n\n", name);
        printf("OPTIONS:\n");
 {
        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 <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\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-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 (tele)\n",
+              AM7XXX_ZOOM_ORIGINAL, AM7XXX_ZOOM_TELE);

        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("\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 ret;
 }
 
 int main(int argc, char *argv[])
 {
        int ret;

-       int exit_code = EXIT_SUCCESS;

        int opt;
 
        char filename[FILENAME_MAX] = {0};
        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;
        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;
        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;
 
        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) {
                switch (opt) {

+               case 'd':
+                       device_index = atoi(optarg);
+                       if (device_index < 0) {
+                               fprintf(stderr, "Unsupported device index\n");
+                               ret = -EINVAL;
+                               goto out;
+                       }
+                       break;

                case 'f':
                case 'f':

+                       if (filename[0] != '\0')
+                               fprintf(stderr, "Warning: image file already specified\n");

                        strncpy(filename, optarg, FILENAME_MAX);
                        break;
                case 'F':
                        strncpy(filename, optarg, FILENAME_MAX);
                        break;
                case 'F':


@@ -77,7 +103,8 @@ int main(int argc, char *argv[])
                                break;
                        default:
                                fprintf(stderr, "Unsupported format\n");
                                break;
                        default:
                                fprintf(stderr, "Unsupported format\n");

-                               exit(EXIT_FAILURE);
+                               ret = -EINVAL;
+                               goto out;

                        }
                        break;
                case 'l':
                        }
                        break;
                case 'l':


@@ -87,61 +114,112 @@ int main(int argc, char *argv[])
                                log_level = AM7XXX_LOG_ERROR;
                        }
                        break;
                                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);
+                               ret = -EINVAL;
+                               goto out;
+                       }
+                       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:
+                       case AM7XXX_ZOOM_TELE:
+                               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_TELE);
+                               ret = -EINVAL;
+                               goto out;
+                       }
+                       break;

                case 'W':
                        width = atoi(optarg);
                        if (width < 0) {
                                fprintf(stderr, "Unsupported width\n");
                case 'W':
                        width = atoi(optarg);
                        if (width < 0) {
                                fprintf(stderr, "Unsupported width\n");

-                               exit(EXIT_FAILURE);
+                               ret = -EINVAL;
+                               goto out;

                        }
                        break;
                case 'H':
                        height = atoi(optarg);
                        if (height < 0) {
                                fprintf(stderr, "Unsupported height\n");
                        }
                        break;
                case 'H':
                        height = atoi(optarg);
                        if (height < 0) {
                                fprintf(stderr, "Unsupported height\n");

-                               exit(EXIT_FAILURE);
+                               ret = -EINVAL;
+                               goto out;

                        }
                        break;
                case 'h':
                        usage(argv[0]);
                        }
                        break;
                case 'h':
                        usage(argv[0]);

-                       exit(EXIT_SUCCESS);
-                       break;
+                       ret = 0;
+                       goto out;

                default: /* '?' */
                        usage(argv[0]);
                default: /* '?' */
                        usage(argv[0]);

-                       exit(EXIT_FAILURE);
+                       ret = -EINVAL;
+                       goto out;

                }
        }
 
        if (filename[0] == '\0') {
                }
        }
 
        if (filename[0] == '\0') {

-               fprintf(stderr, "An image file MUST be specified.\n");
-               exit_code = EXIT_FAILURE;
+               fprintf(stderr, "An image file MUST be specified with the -f option.\n\n");
+               usage(argv[0]);
+               ret = -EINVAL;

                goto out;
        }
 
                goto out;
        }
 

-       image_fd = open(filename, O_RDONLY);
-       if (image_fd < 0) {
-               perror("open");
-               exit_code = EXIT_FAILURE;
+       image_fp = fopen(filename, "rb");
+       if (image_fp == NULL) {
+               perror("fopen");
+               ret = -EINVAL;

                goto out;
        }
                goto out;
        }

-       if (fstat(image_fd, &st) < 0) {
+       ret = fstat(fileno(image_fp), &st);
+       if (ret < 0) {

                perror("fstat");
                perror("fstat");

-               exit_code = EXIT_FAILURE;
-               goto out_close_image_fd;
+               goto out_close_image_fp;

        }
        size = st.st_size;
 
        }
        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) {
        if (image == NULL) {

-               perror("mmap");
-               exit_code = EXIT_FAILURE;
-               goto out_close_image_fd;
+               perror("malloc");
+               ret = -ENOMEM;
+               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");
+
+               if (ret >= 0)
+                       ret = -EINVAL;
+               goto out_free_image;

        }
 
        ret = am7xxx_init(&ctx);
        if (ret < 0) {
                perror("am7xxx_init");
        }
 
        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);
        }
 
        am7xxx_set_log_level(ctx, log_level);


@@ -149,63 +227,71 @@ int main(int argc, char *argv[])
        ret = am7xxx_open_device(ctx, &dev, 0);
        if (ret < 0) {
                perror("am7xxx_open_device");
        ret = am7xxx_open_device(ctx, &dev, 0);
        if (ret < 0) {
                perror("am7xxx_open_device");

-               exit_code = EXIT_FAILURE;

                goto cleanup;
        }
 
                goto cleanup;
        }
 

-

        ret = am7xxx_close_device(dev);
        if (ret < 0) {
                perror("am7xxx_close_device");
        ret = am7xxx_close_device(dev);
        if (ret < 0) {
                perror("am7xxx_close_device");

-               exit_code = EXIT_FAILURE;

                goto cleanup;
        }
 
                goto cleanup;
        }
 

-       ret = am7xxx_open_device(ctx, &dev, 0);
+       ret = am7xxx_open_device(ctx, &dev, device_index);

        if (ret < 0) {
                perror("am7xxx_open_device");
        if (ret < 0) {
                perror("am7xxx_open_device");

-               exit_code = EXIT_FAILURE;

                goto cleanup;
        }
 
        ret = am7xxx_get_device_info(dev, &device_info);
        if (ret < 0) {
                goto cleanup;
        }
 
        ret = am7xxx_get_device_info(dev, &device_info);
        if (ret < 0) {

-               perror("am7xxx_get_info");
-               exit_code = EXIT_FAILURE;
+               perror("am7xxx_get_device_info");

                goto cleanup;
        }
        printf("Native resolution: %dx%d\n",
               device_info.native_width, device_info.native_height);
 
                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");
+               goto cleanup;
+       }
+
+       ret = am7xxx_set_power_mode(dev, power_mode);

        if (ret < 0) {
                perror("am7xxx_set_power_mode");
        if (ret < 0) {
                perror("am7xxx_set_power_mode");

-               exit_code = EXIT_FAILURE;

                goto cleanup;
        }
 
                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");
        if (ret < 0) {
                perror("am7xxx_send_image");

-               exit_code = EXIT_FAILURE;

                goto cleanup;
        }
 
                goto cleanup;
        }
 

-       exit_code = EXIT_SUCCESS;
+       ret = 0;

 
 cleanup:
        am7xxx_shutdown(ctx);
 
 
 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:
+       if (fclose(image_fp) == EOF)
+               perror("fclose");

 
 out:
 
 out:

-       exit(exit_code);
+       return ret;

 }
 }