esp_jpg_decode.h

// Copyright 2015-2016 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.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef _ESP_JPG_DECODE_H_
#define _ESP_JPG_DECODE_H_

#ifdef __cplusplus
extern "C" {
#endif

#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
#include "esp_err.h"

typedef enum {
    JPG_SCALE_NONE,
    JPG_SCALE_2X,
    JPG_SCALE_4X,
    JPG_SCALE_8X,
    JPG_SCALE_MAX = JPG_SCALE_8X
} jpg_scale_t;

typedef size_t (* jpg_reader_cb)(void * arg, size_t index, uint8_t *buf, size_t len);
typedef bool (* jpg_writer_cb)(void * arg, uint16_t x, uint16_t y, uint16_t w, uint16_t h, uint8_t *data);

esp_err_t esp_jpg_decode(size_t len, jpg_scale_t scale, jpg_reader_cb reader, jpg_writer_cb writer, void * arg);

#ifdef __cplusplus
}
#endif

#endif /* _ESP_JPG_DECODE_H_ */