takuya-takeuchi / openjpegdotnet Goto Github PK

When can it support openjpeg v2.5

Hi,
I'm trying to install version 2.4.0.20210417 via the nuget package manager and I get an error

Seems like a dll is missing. Are there any additional steps I need to take for me to be able to use the package?
Please let me know if I'm missing anything.
I'm testing this on a .net framework 4.7.2 app for some basic jp2000 image conversions.

HI,

I can't seem to make SetupDecoder return true because NativeMethods.openjpeg_openjp2_opj_setup_decoder returns false. Do I need to download a j2k codec from somewhere else?

Thanks

openjpeg version

• opj_version

image functions

• opj_image_create
• opj_image_destroy
• opj_image_tile_create
• opj_image_data_alloc
• opj_image_data_free

stream functions

• opj_stream_default_create
• opj_stream_create
• opj_stream_destroy
• opj_stream_set_read_function
• opj_stream_set_write_function
• opj_stream_set_skip_function
• opj_stream_set_seek_function
• opj_stream_set_user_data
• opj_stream_set_user_data_length
• opj_stream_create_default_file_stream
• opj_stream_create_file_stream

event manager functions

• opj_set_info_handler
• opj_set_warning_handler
• opj_set_error_handler

codec functions

DECOMPRESSION FUNCTIONS

• opj_create_decompress
• opj_destroy_codec
• opj_end_decompress
• opj_set_default_decoder_parameters
• opj_setup_decoder
• opj_codec_set_threads
• opj_read_header
• opj_set_decoded_components
• opj_set_decode_area
• opj_decode
• opj_get_decoded_tile
• opj_set_decoded_resolution_factor
• opj_write_tile
• opj_read_tile_header
• opj_decode_tile_data

COMPRESSION FUNCTIONS

• opj_create_compress
• opj_set_default_encoder_parameters
• opj_setup_encoder
• opj_encoder_set_extra_options
• opj_start_compress
• opj_end_compress
• opj_encode

codec output functions

• opj_destroy_cstr_info
• opj_dump_codec
• opj_get_cstr_info
• opj_get_cstr_index
• opj_destroy_cstr_index
• opj_get_jp2_metadata
• opj_get_jp2_index

MCT functions

• opj_set_MCT

Thread function

• opj_has_thread_support
• opj_get_num_cpus

Error in Alpine docker: Segmentation fault (core dumped). But run correctly in Centos VM.
Help, please. Thank you.

OpenJpegDotNet is perfect in x64 but it's has a problem in x86.
I used your library to encode bitmap file to jpeg2000. However, the following problem occurred in x86.

var buffer = new Buffer
{
Data = outputBuffer,
Length = bufferLength,
Position = 0
};

Data has address, length has imageSize + 1024, Position is zero.
After setting StreamCreate, StreamSetUpdateData, SteamSetUserDataLength and CallBack. I start to encode.

But the following problem occurred in StreamWriteCallBack()

var buf = (Buffer*)userData;

buf->Data has address, buf->Length is zero and buf->position is imageSize + 1024.
I'm wondering why is change Length and Position?
Always buf->Length is zero condition, so it's return unchecked((ulong)-1);

I think maybe the OpenJpegDotNetNative.dll of 32bit and 64bit is different. What do you think?

Can you provide an example of how to encode a Bitmap image as J2K stored in byte[] ?
The README has an example of decoding from byte[] to Bitmap. How is the opposite achieved?

size_t is implementation defined and it may be signed long.
Therefore, C# side must use long rather than ulong.