added generic camera sample for custom cameras

examples/custom-camera-sender/custom-camera-sender.cpp

@@ -0,0 +1,120 @@
+/**************************************************
+ * ESPNowCam video Transmitter
+ * by @hpsaturn Copyright (C) 2024
+ * This file is part ESP32S3 camera tests project:
+ * https://github.com/hpsaturn/esp32s3-cam
+**************************************************/
+
+#include <Arduino.h>
+#include <esp_camera.h>
+#include <ESPNowCam.h>
+#include <Utils.h>
+
+ESPNowCam radio;
+camera_fb_t* fb;
+
+bool has_psram = false;
+
+camera_config_t camera_config = {
+    .pin_pwdn = -1,
+    .pin_reset = 15,
+    .pin_xclk = 27,
+    .pin_sscb_sda = 25,
+    .pin_sscb_scl = 23,
+    .pin_d7 = 19,
+    .pin_d6 = 36,
+    .pin_d5 = 18,
+    .pin_d4 = 39,
+    .pin_d3 = 5,
+    .pin_d2 = 34,
+    .pin_d1 = 35,
+    .pin_d0 = 17,
+    .pin_vsync = 22,
+    .pin_href = 26,
+    .pin_pclk = 21,
+
+    .xclk_freq_hz = 20000000,
+    .ledc_timer   = LEDC_TIMER_0,
+    .ledc_channel = LEDC_CHANNEL_0,
+
+    .pixel_format  = PIXFORMAT_JPEG,
+    .frame_size    = FRAMESIZE_QVGA,
+    .jpeg_quality  = 12,
+    .fb_count      = 1,
+    .fb_location   = CAMERA_FB_IN_DRAM,
+    .grab_mode     = CAMERA_GRAB_WHEN_EMPTY,
+};
+
+bool CameraBegin() {
+  esp_err_t err = esp_camera_init(&camera_config);
+  if (err != ESP_OK) {
+    return false;
+  }
+  return true;
+}
+
+bool CameraGet() {
+  fb = esp_camera_fb_get();
+  if (!fb) {
+    return false;
+  }
+  return true;
+}
+
+bool CameraFree() {
+  if (fb) {
+    esp_camera_fb_return(fb);
+    return true;
+  }
+  return false;
+}
+
+void processFrame() {
+  if (CameraGet()) {
+    if (has_psram) {
+      uint8_t *out_jpg = NULL;
+      size_t out_jpg_len = 0;
+      frame2jpg(fb, 12, &out_jpg, &out_jpg_len);
+      radio.sendData(out_jpg, out_jpg_len);
+      free(out_jpg);
+    }
+    else{
+      radio.sendData(fb->buf, fb->len);
+      delay(30); // ==> weird delay for cameras without PSRAM
+    }
+    printFPS("CAM:");
+    CameraFree();
+  }
+}
+
+void setup() {
+  Serial.begin(115200);
+
+  delay(5000); // only for debugging 
+
+  if(psramFound()){
+    has_psram = true;
+    size_t psram_size = esp_spiram_get_size() / 1048576;
+    Serial.printf("PSRAM size: %dMb\r\n", psram_size);
+    // suggested config with PSRAM
+    camera_config.pixel_format = PIXFORMAT_RGB565;
+    camera_config.fb_location = CAMERA_FB_IN_PSRAM;
+    camera_config.fb_count = 2;
+  }
+  else{
+    Serial.println("PSRAM not found! Basic framebuffer setup.");
+  }
+
+  radio.init();
+
+  if (!CameraBegin()) {
+    Serial.println("Camera Init Fail");
+    delay(1000);
+    ESP.restart();
+  }
+  delay(500);
+}
+
+void loop() {
+  processFrame();
+}

platformio.ini

@@ -67,6 +67,12 @@ build_src_filter = -<*> -<*common*> +<tjournal-espnow-sender/>
 build_flags =
   -D CORE_DEBUG_LEVEL=0
 
+[env:custom-camera-sender]
+platform = espressif32 @ 4.4.0
+extends = env
+board = esp32dev
+build_src_filter = -<*> -<*common*> +<custom-camera-sender/>
+
 [m5cores3_common]
 extends = esp32common
 lib_deps =