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include/README

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+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

include/esp32cam.h

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+#pragma once
+
+#define APP_TITLE "ESP32CAM-RTSP"
+#define APP_VERSION "1.0"
+
+#define WIFI_SSID "ESP32CAM-RTSP"
+#define WIFI_PASSWORD nullptr
+#define CONFIG_VERSION "1.1"
+
+#define RTSP_PORT 554
+#define DEFAULT_FRAMERATE "20"
+#define DEFAULT_FRAMESIZE "SVGA (800x600)"

include/frame_size.h

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+#pragma once
+
+#include <string.h>
+#include <sensor.h>
+
+typedef char frame_size_name_t[18];
+
+typedef struct frame_size_entry
+{
+    frame_size_name_t name;
+    framesize_t frame_size;
+} frame_size_entry_t;
+
+constexpr const frame_size_entry_t frame_sizes[] = {
+
+    {"96x96", FRAMESIZE_96X96},
+    {"QQVGA (160x120)", FRAMESIZE_QQVGA},
+    {"QCIF (176x144)", FRAMESIZE_QCIF},
+    {"HQVGA (240x176)", FRAMESIZE_HQVGA},
+    {"240x240", FRAMESIZE_240X240},
+    {"QVGA (320x240)", FRAMESIZE_QVGA},
+    {"CIF (400x296)", FRAMESIZE_CIF},
+    {"HVGA (480x320)", FRAMESIZE_HVGA},
+    {"VGA (640x480)", FRAMESIZE_VGA},
+    {"SVGA (800x600)", FRAMESIZE_SVGA},
+    {"XGA (1024x768)", FRAMESIZE_XGA},
+    {"HD (1280x720)", FRAMESIZE_HD},
+    {"SXGA (1280x1024)", FRAMESIZE_SXGA},
+    {"UXGA (1600x1200)", FRAMESIZE_UXGA},
+    {"FHD (1920x1080)", FRAMESIZE_FHD},
+    {"P HD (2560x1440)", FRAMESIZE_P_HD},
+    {"P 3MP (2560x1600)", FRAMESIZE_P_3MP},
+    {"QXGA (2560x1920)", FRAMESIZE_QXGA},
+    {"QHD (2560x1440)", FRAMESIZE_QHD},
+    {"WQXGA (2560x1600)", FRAMESIZE_WQXGA},
+    {"P FHD (1080x1920)", FRAMESIZE_P_FHD},
+    {"QSXGA (2560x1920)", FRAMESIZE_QSXGA},
+    {"", FRAMESIZE_INVALID}};
+
+framesize_t lookup_frame_size(const char *pin)
+{
+    // Lookup table for the frame name to framesize_t
+    auto entry = &frame_sizes[0];
+    while (*entry->name)
+    {
+        if (strncmp(entry->name, pin, sizeof(frame_size_name_t)) == 0)
+            return entry->frame_size;
+
+        entry++;
+    }
+
+    return FRAMESIZE_INVALID;
+}