jason-mao/esp_jpeg

readme

# ESP_JPEG

ESP_JPEG is Espressif's lightweight JPEG encoder and decoder library. The memory and CPU loading are optimized to make better use of Espressif chips.

## Features

Encoder:  
    - Support variety of width and height to encoder  
    - Support RGB888 RGBA YCbYCr YCbY2YCrY2 GRAY raw data  
    - Support YUV444 YUV422 YUV420 subsampling  
    - Support quality(1-100)  
    - Support 0, 90 180 270 degree clockwise rotation, under the follow cases.  
       1. src_type = JPEG_PIXEL_FORMAT_YCbYCr, subsampling = JPEG_SUBSAMPLE_420 and width and height are multiply of 16.  
       2. src_type = JPEG_PIXEL_FORMAT_YCbYCr, subsampling = JPEG_SUBSAMPLE_GRAY and width and height are multiply of 8.  
    - Support mono-task and dual-task  
    - Support two mode encoder, respectively block encoder and one image encoder.  

Decoder:  
    - Support variety of width and height to decoder  
    - Support one and three channels decoder  
    - Support RGB888 RGB565(big endian) RGB565(little endian) CbYCrY raw data output  
    - Support 0, 90 180 270 degree clockwise rotation, under width and height are multiply of 8.