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jpeg_decoder_process() function
Process a JPEG image with the specified decoder instance. This function processes the provided JPEG image data using the specified JPEG decoder instance. The input JPEG image data is specified by the `bit_stream` pointer and the `stream_size` parameter. The resulting decoded image data is written to the `decode_outbuf` buffer, and the length of the output image data is returned through the `out_size` pointer.
Syntax
esp_err_t jpeg_decoder_process(jpeg_decoder_handle_t decoder_engine,
const jpeg_decode_cfg_t *decode_cfg,
const uint8_t *bit_stream,
uint32_t stream_size,
uint8_t *decode_outbuf,
uint32_t outbuf_size,
uint32_t *out_size);
Return value
- ESP_OK: JPEG decoder process successfully. - ESP_ERR_INVALID_ARG: JPEG decoder process failed because of invalid argument.
Notes
1.Please make sure that the content of `bit_stream` pointer cannot be modified until this function returns. 2.Please note that the output size of image is always the multiple of 16 depends on protocol of JPEG.
Related Functions
Found 2 other functions taking a ![]()
jpeg_decoder_t
argument:
Function
Description
Acquire a JPEG decode engine with the specified configuration. This function acquires a JPEG decode engine with the specified configuration. The configuration parameters are provided through the `dec_eng_cfg` structure, and the resulting JPEG decoder handle is returned through the `ret_decoder` pointer.
Release resources used by a JPEG decoder instance. This function releases the resources used by the specified JPEG decoder instance. The decoder instance is specified by the `decoder_engine` parameter.