Decoder status differences between version 0.7.0 and 0.11.1 #4400
Description
Hi. Hopefully this is a simple question. With JPEG XL 0.7.0, I find I receive different output from JxlDecoderProcessInput() than I do with JPEG XL 0.11.1.
I've tried to simplify the code like so, running over a test image.
JxlBasicInfo basic_info;
uint8_t *jxl_icc;
size_t jxl_icc_len;
Py_ssize_t n_frames = 0;
Py_ssize_t jxl_data_len = _tmp_jxl_data_len;
uint8_t *jxl_data = malloc(jxl_data_len);
memcpy(jxl_data, _tmp_jxl_data, jxl_data_len);
JxlThreadParallelRunnerCreate(NULL, 4);
JxlDecoder *decoder = JxlDecoderCreate(NULL);
JxlDecoderStatus status = JxlDecoderSubscribeEvents(decoder, JXL_DEC_BASIC_INFO | JXL_DEC_COLOR_ENCODING | JXL_DEC_FRAME | JXL_DEC_FULL_IMAGE);
status = JxlDecoderSetDecompressBoxes(decoder, JXL_TRUE);
status = JxlDecoderSetInput(decoder, jxl_data, jxl_data_len);
JxlDecoderCloseInput(decoder);
// decode everything up to the first frame
do {
status = JxlDecoderProcessInput(decoder);
printf("Status during first frame: %d\n", status);
if (status == JXL_DEC_BASIC_INFO) {
status = JxlDecoderGetBasicInfo(decoder, &basic_info);
} else if (status == JXL_DEC_COLOR_ENCODING) {
status = JxlDecoderGetICCProfileSize(
decoder,
#if JPEGXL_MINOR_VERSION < 9
NULL,
#endif
JXL_COLOR_PROFILE_TARGET_DATA,
&jxl_icc_len
);
jxl_icc = malloc(jxl_icc_len);
status = JxlDecoderGetColorAsICCProfile(
decoder,
#if JPEGXL_MINOR_VERSION < 9
NULL,
#endif
JXL_COLOR_PROFILE_TARGET_DATA,
jxl_icc,
jxl_icc_len
);
}
} while (status != JXL_DEC_FRAME);
if (basic_info.have_animation) {
while (status != JXL_DEC_SUCCESS) {
status = JxlDecoderProcessInput(decoder);
if (status == JXL_DEC_NEED_IMAGE_OUT_BUFFER) {
JxlDecoderSkipCurrentFrame(decoder);
n_frames++;
}
}
JxlDecoderRewind(decoder);
}
JxlFrameHeader fhdr = {};
while (status != JXL_DEC_NEED_IMAGE_OUT_BUFFER) {
status = JxlDecoderProcessInput(decoder);
printf("Status: %d\n", status);
if (status == JXL_DEC_SUCCESS) {
printf("Done with JXL_DEC_SUCCESS\n");
Py_RETURN_NONE;
} else if (status == JXL_DEC_NEED_MORE_INPUT) {
status = JxlDecoderSetInput(decoder, jxl_data, jxl_data_len);
JxlDecoderCloseInput(decoder);
} else if (status == JXL_DEC_FRAME) {
status = JxlDecoderGetFrameHeader(decoder, &fhdr);
continue;
}
}
printf("Done\n");Is there anything in the above block that I'm obviously doing wrong for 0.7.0?
With JPEG XL 0.11.1, I'm able to receive JXL_DEC_BASIC_INFO from the second frame in the image. With JPEG XL 0.7.0, it instead just gives me JXL_DEC_SUCCESS. I presume there should be some way that 0.7.0 can still get information about subsequent frames.
0.7.0
Status during first frame: 64
Status during first frame: 256
Status during first frame: 1024
Status: 2
Status: 0
Done with JXL_DEC_SUCCESS
0.11.1
Status during first frame: 64
Status during first frame: 256
Status during first frame: 1024
Status: 2
Status: 64
Status: 256
Status: 1024
Status: 5
Done
Thanks for your time.