feat: Use esp_jpeg component for decoding

.gitignore

@@ -3,4 +3,5 @@
 **/build
 **/sdkconfig
 **/sdkconfig.old
-**/dependencies.lock
+**/dependencies.lock
+**/managed_components/**

CMakeLists.txt

@@ -7,7 +7,6 @@ set(srcs
   conversions/to_jpg.cpp
   conversions/to_bmp.c
   conversions/jpge.cpp
-  conversions/esp_jpg_decode.c
   )
 
 set(priv_include_dirs
@@ -61,7 +60,6 @@ if(IDF_TARGET STREQUAL "esp32" OR IDF_TARGET STREQUAL "esp32s2" OR IDF_TARGET ST
     list(APPEND srcs
       target/xclk.c
       target/esp32s2/ll_cam.c
-      target/tjpgd.c
       )
 
     list(APPEND priv_include_dirs
@@ -83,7 +81,7 @@ if(IDF_TARGET STREQUAL "esp32" OR IDF_TARGET STREQUAL "esp32s2" OR IDF_TARGET ST
   endif()
 
   # include the SCCB I2C driver
-  # this uses either the legacy I2C API or the newwer version from IDF v5.4
+  # this uses either the legacy I2C API or the newer version from IDF v5.4
   # as this features a method to obtain the I2C driver from a port number
   if (idf_version VERSION_GREATER_EQUAL "5.4")
     list(APPEND srcs driver/sccb-ng.c)
@@ -93,17 +91,6 @@ if(IDF_TARGET STREQUAL "esp32" OR IDF_TARGET STREQUAL "esp32s2" OR IDF_TARGET ST
 
 endif()
 
-# CONFIG_ESP_ROM_HAS_JPEG_DECODE is available from IDF v4.4 but
-# previous IDF supported chips already support JPEG decoder, hence okay to use this
-if(idf_version VERSION_GREATER_EQUAL "4.4" AND NOT CONFIG_ESP_ROM_HAS_JPEG_DECODE)
-  list(APPEND srcs
-    target/tjpgd.c
-  )
-  list(APPEND priv_include_dirs
-    target/jpeg_include/
-  )
-endif()
-
 idf_component_register(
   SRCS ${srcs}
   INCLUDE_DIRS ${include_dirs}

conversions/include/img_converters.h

@@ -1,4 +1,4 @@
-// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
+// Copyright 2015-2025 Espressif Systems (Shanghai) PTE LTD
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -22,7 +22,7 @@ extern "C" {
 #include <stdint.h>
 #include <stdbool.h>
 #include "esp_camera.h"
-#include "esp_jpg_decode.h"
+#include "jpeg_decoder.h"
 
 typedef size_t (* jpg_out_cb)(void * arg, size_t index, const void* data, size_t len);
 
@@ -121,7 +121,13 @@ bool frame2bmp(camera_fb_t * fb, uint8_t ** out, size_t * out_len);
  */
 bool fmt2rgb888(const uint8_t *src_buf, size_t src_len, pixformat_t format, uint8_t * rgb_buf);
 
-bool jpg2rgb565(const uint8_t *src, size_t src_len, uint8_t * out, jpg_scale_t scale);
+// Macros for backwards compatibility
+#define JPG_SCALE_NONE JPEG_IMAGE_SCALE_0
+#define JPG_SCALE_2X   JPEG_IMAGE_SCALE_1_2
+#define JPG_SCALE_4X   JPEG_IMAGE_SCALE_1_4
+#define JPG_SCALE_8X   JPEG_IMAGE_SCALE_1_8
+#define JPG_SCALE_MAX  JPEG_IMAGE_SCALE_1_8
+bool jpg2rgb565(const uint8_t *src, size_t src_len, uint8_t * out, esp_jpeg_image_scale_t scale);
 
 #ifdef __cplusplus
 }