How to read the JPEG data directly??

[Herwey]

        fb = esp_camera_fb_get();   //获得buffer指针
    if (!fb) {
        ESP_LOGE(TAG, "Camera capture failed");
        res = ESP_FAIL;
    } else {
        if(fb->format != PIXFORMAT_JPEG){
            bool jpeg_converted = frame2jpg(fb, 80, &_jpg_buf, &_jpg_buf_len);  // 获取图像buffer
            if(!jpeg_converted){
                ESP_LOGE(TAG, "JPEG compression failed");
                esp_camera_fb_return(fb);
                res = ESP_FAIL;
            }
        } else {
             _jpg_buf_len = fb->len;
             _jpg_buf = fb->buf;
        }

Now, I want to read the _jpg_buf directly(RGB), how to do this ? Can I ? I want to transfer the JPEG by spi.

[EeeeBin]

sorry，i don`t konw what you want to, rgb or jpeg data? if jpeg, just need transfer fb buffer by spi, like this https://github.com/m5stack/m5stack-cam-psram/blob/uart/main/main.c#L108, if rgb, I don't recommend generating rgb data via spi

[Herwey]

This ，it's jpeg data. But this one via UART ? not spi. I think. :D

[EeeeBin]

https://github.com/espressif/esp-idf/tree/master/examples/peripherals Use spi send fun instead uart

[Herwey]

Hi: I printed the jpeg fb, it includes int numbers. What the meaning of the these numbers? can i read the rgb info from the numbers? :P