feat(cam): support format conversion function

examples/peripherals/camera/dvp_spi_lcd/main/Kconfig.projbuild

@@ -30,4 +30,15 @@ menu "Example Configuration"
         int
         default 480 if EXAMPLE_CAM_VRES_480
         default 240 if EXAMPLE_CAM_VRES_240
+
+    choice EXAMPLE_CAM_INPUT_FORMAT
+        bool "Set camera input format"
+        default EXAMPLE_CAM_INPUT_FORMAT_YUV422
+
+        config EXAMPLE_CAM_INPUT_FORMAT_RGB565
+            bool "RGB565"
+        config EXAMPLE_CAM_INPUT_FORMAT_YUV422
+            bool "YUV422"
+    endchoice
+
 endmenu

examples/peripherals/camera/dvp_spi_lcd/main/dvp_spi_lcd_main.c

@@ -146,7 +146,11 @@ void app_main(void)
         .clk_src = CAM_CLK_SRC_DEFAULT,
         .h_res = CONFIG_EXAMPLE_CAM_HRES,
         .v_res = CONFIG_EXAMPLE_CAM_VRES,
+#if CONFIG_EXAMPLE_CAM_INPUT_FORMAT_YUV422
+        .input_data_color_type = CAM_CTLR_COLOR_YUV422,
+#else
         .input_data_color_type = CAM_CTLR_COLOR_RGB565,
+#endif
         .dma_burst_size = 64,
         .pin = &pin_cfg,
         .bk_buffer_dis = 1,
@@ -200,6 +204,20 @@ void app_main(void)
     //--------Enable and start Camera Controller----------//
     ESP_ERROR_CHECK(esp_cam_ctlr_enable(cam_handle));
 
+#if CONFIG_EXAMPLE_CAM_INPUT_FORMAT_YUV422
+    ESP_LOGI(TAG, "Configure format conversion: YUV422 -> RGB565");
+    // Configure format conversion
+    const cam_ctlr_format_conv_config_t conv_cfg = {
+        .src_format = CAM_CTLR_COLOR_YUV422,      // Source format: YUV422
+        .dst_format = CAM_CTLR_COLOR_RGB565,      // Destination format: RGB565
+        .conv_std = COLOR_CONV_STD_RGB_YUV_BT601,
+        .data_width = 8,
+        .input_range = COLOR_RANGE_LIMIT,
+        .output_range = COLOR_RANGE_LIMIT,
+    };
+    ESP_ERROR_CHECK(esp_cam_ctlr_format_conversion(cam_handle, &conv_cfg));
+#endif
+
     if (esp_cam_ctlr_start(cam_handle) != ESP_OK) {
         ESP_LOGE(TAG, "Driver start fail");
         return;

examples/peripherals/camera/dvp_spi_lcd/main/example_config.h

@@ -43,7 +43,11 @@ extern "C" {
 #define EXAMPLE_DVP_CAM_BUF_ALLOC_CAPS     (MALLOC_CAP_INTERNAL | MALLOC_CAP_DMA)
 #endif
 
+#if CONFIG_EXAMPLE_CAM_INPUT_FORMAT_YUV422
+#define EXAMPLE_CAM_FORMAT                  "DVP_8bit_20Minput_YUV422_240x240_25fps" // ov2640
+#elif CONFIG_EXAMPLE_CAM_INPUT_FORMAT_RGB565
 #define EXAMPLE_CAM_FORMAT                  "DVP_8bit_20Minput_RGB565_240x240_25fps" // ov2640
+#endif
 
 #ifndef EXAMPLE_CAM_FORMAT
 #error "Unsupported camera format! Please adjust EXAMPLE_CAM_HRES and EXAMPLE_CAM_VRES in menuconfig"