what is CONFIG_SOC_JPEG_DECODE_SUPPORTED and ESP_LV_ENABLE_HW_JPEG? (AEGHB-1253)

[zhiyoutech]

Answers checklist.

• I have read the documentation ESP-IDF Programming Guide and the issue is not addressed there.
• I have updated my IDF branch (master or release) to the latest version and checked that the issue is present there.
• I have searched the issue tracker for a similar issue and not found a similar issue.

General issue report

In component of esp_lv_decoder, there is an head file named esp_lv_decoder_config.h

the first question is :
In esp_lv_decoder_config.h, the macro named CONFIG_SOC_JPEG_DECODE_SUPPORTED is not found in ESP IDF v5.4.1. meanwhile, how to configure the macore called ESP_LV_ENABLE_HW_JPEG?

the second question is :
by the way, could please provide an example about how to use esp_lv_decoder in LVGL9? the example called perf_benchmark is only suitable to LVGL8.

the file lv_decoder_config.h is defined as fellows:
#pragma once
#include "sdkconfig.h"

#ifndef ESP_LV_ENABLE_HW_JPEG
#if defined(CONFIG_SOC_JPEG_DECODE_SUPPORTED) && CONFIG_SOC_JPEG_DECODE_SUPPORTED
#define ESP_LV_ENABLE_HW_JPEG 1
#else
#define ESP_LV_ENABLE_HW_JPEG 0
#endif
#endif

#ifndef ESP_LV_ENABLE_PJPG
#if ESP_LV_ENABLE_HW_JPEG
#define ESP_LV_ENABLE_PJPG 1
#else
#define ESP_LV_ENABLE_PJPG 0
#endif
#endif

[Horion0415]

Currently, lv_decoder supports IDF release v5.5 and above.
The macro is used to indicate whether the platform chip supports hardware JPEG decoding.
If hardware JPEG is supported, ESP_LV_ENABLE_HW_JPEG will be automatically enabled.

For examples, please refer to the test_app under the component. We will release additional usage examples later.