opj_stream_t* ossimOpjCompressor::createOpjStream( std::ostream* os ) const
{
opj_stream_t* stream = 0;
if ( os )
{
// stream = opj_stream_create_default_file_stream("test.jp2", OPJ_FALSE);
// OPJ stream:
// stream = opj_stream_create(OPJ_J2K_STREAM_CHUNK_SIZE, OPJ_FALSE);
// stream = opj_stream_create(512, OPJ_FALSE);
// stream = opj_stream_create_default_file_stream("test.jp2", OPJ_FALSE); // false = output.
stream = opj_stream_create(1048576, OPJ_FALSE);
if ( stream )
{
// cout << "stream good..." << endl;
// Set OPJ user stream:
opj_stream_set_user_data(stream, os, ossim_opj_free_user_ostream_data);
// Set callbacks:
// opj_stream_set_read_function(m_stream, ossim_opj_stream_read);
// opj_stream_set_read_function(stream, ossim_opj_imagedata_read);
opj_stream_set_write_function(stream, ossim_opj_ostream_write);
opj_stream_set_skip_function(stream, ossim_opj_ostream_skip);
opj_stream_set_seek_function(stream, ossim_opj_ostream_seek);
}
}
return stream;
} // End: ossimOpjCompressor::createOpjStream()
OpenJPEG_createIO(nrt_IOInterface* io,
IOControl* ioControl,
nrt_Off length,
int isInput,
nrt_Error *error)
{
opj_stream_t *stream = NULL;
stream = opj_stream_create(OPENJPEG_STREAM_SIZE, isInput);
if (!stream)
{
nrt_Error_init(error, "Error creating openjpeg stream", NRT_CTXT,
NRT_ERR_MEMORY);
}
else
{
ioControl->io = io;
ioControl->offset = nrt_IOInterface_tell(io, error);
if (length > 0)
ioControl->length = length;
else
ioControl->length = nrt_IOInterface_getSize(io, error)
- ioControl->offset;
opj_stream_set_user_data(stream, ioControl);
opj_stream_set_read_function(stream, implStreamRead);
opj_stream_set_seek_function(stream, implStreamSeek);
opj_stream_set_skip_function(stream, implStreamSkip);
opj_stream_set_write_function(stream, implStreamWrite);
}
return stream;
}
J2KFIO_t*
opj_freeimage_stream_create(FreeImageIO *io, fi_handle handle, BOOL bRead) {
if(!handle) {
return NULL;
}
J2KFIO_t *fio = (J2KFIO_t*)malloc(sizeof(J2KFIO_t));
if(fio) {
fio->io = io;
fio->handle = handle;
opj_stream_t *l_stream = opj_stream_create(OPJ_J2K_STREAM_CHUNK_SIZE, bRead ? OPJ_TRUE : OPJ_FALSE);
if (l_stream) {
opj_stream_set_user_data(l_stream, fio);
opj_stream_set_user_data_length(l_stream, _LengthProc(fio));
opj_stream_set_read_function(l_stream, (opj_stream_read_fn)_ReadProc);
opj_stream_set_write_function(l_stream, (opj_stream_write_fn)_WriteProc);
opj_stream_set_skip_function(l_stream, (opj_stream_skip_fn)_SkipProc);
opj_stream_set_seek_function(l_stream, (opj_stream_seek_fn)_SeekProc);
fio->stream = l_stream;
return fio;
} else {
free(fio);
}
}
return NULL;
}
static opj_stream_t *opj_stream_create_from_file(const char *filepath,
OPJ_UINT32 p_size,
OPJ_BOOL p_is_read_stream,
FILE **r_file)
{
FILE *p_file = BLI_fopen(filepath, p_is_read_stream ? "rb" : "wb");
if (p_file == NULL) {
return NULL;
}
opj_stream_t *l_stream = opj_stream_create(p_size, p_is_read_stream);
if (l_stream == NULL) {
fclose(p_file);
return NULL;
}
opj_stream_set_user_data(l_stream, p_file, opj_free_from_file);
opj_stream_set_user_data_length(l_stream, opj_get_data_length_from_file(p_file));
opj_stream_set_write_function(l_stream, opj_write_from_file);
opj_stream_set_read_function(l_stream, opj_read_from_file);
opj_stream_set_skip_function(l_stream, opj_skip_from_file);
opj_stream_set_seek_function(l_stream, opj_seek_from_file);
if (r_file) {
*r_file = p_file;
}
return l_stream;
}
/* Static generator of opj_stream from file stream */
static opj_stream_t *
opjCreateStream(FILE *fp,
l_int32 is_read_stream)
{
opj_stream_t *l_stream;
PROCNAME("opjStreamCreate");
if (!fp)
return (opj_stream_t *)ERROR_PTR("fp not defined", procName, NULL);
l_stream = opj_stream_create(OPJ_J2K_STREAM_CHUNK_SIZE, is_read_stream);
if (!l_stream)
return (opj_stream_t *)ERROR_PTR("stream not made", procName, NULL);
#if OPJ_VERSION_MINOR == 0
opj_stream_set_user_data(l_stream, fp);
#else
opj_stream_set_user_data(l_stream, fp,
(opj_stream_free_user_data_fn)NULL);
#endif
opj_stream_set_user_data_length(l_stream, opj_get_user_data_length(fp));
opj_stream_set_read_function(l_stream,
(opj_stream_read_fn)opj_read_from_file);
opj_stream_set_write_function(l_stream,
(opj_stream_write_fn)opj_write_from_file);
opj_stream_set_skip_function(l_stream,
(opj_stream_skip_fn)opj_skip_from_file);
opj_stream_set_seek_function(l_stream,
(opj_stream_seek_fn)opj_seek_from_file);
return l_stream;
}
opj_stream_t* OPJ_CALLCONV opj_stream_create_memory_stream(DecodeData* p_mem,OPJ_UINT32 p_size, bool p_is_read_stream)
{
opj_stream_t* l_stream = NULL;
if (! p_mem)
return NULL;
l_stream = opj_stream_create(p_size,p_is_read_stream);
if (!l_stream)
return NULL;
opj_stream_set_user_data(l_stream, p_mem, NULL);
opj_stream_set_user_data_length(l_stream, p_mem->src_size);
opj_stream_set_read_function(l_stream,(opj_stream_read_fn) opj_read_from_memory);
opj_stream_set_write_function(l_stream, (opj_stream_write_fn) opj_write_from_memory);
opj_stream_set_skip_function(l_stream, (opj_stream_skip_fn) opj_skip_from_memory);
opj_stream_set_seek_function(l_stream, (opj_stream_seek_fn) opj_seek_from_memory);
return l_stream;
}
static opj_stream_t *opj_stream_create_from_buffer(struct BufInfo *p_file,
OPJ_UINT32 p_size,
OPJ_BOOL p_is_read_stream)
{
opj_stream_t *l_stream = opj_stream_create(p_size, p_is_read_stream);
if (l_stream == NULL) {
return NULL;
}
opj_stream_set_user_data(l_stream, p_file, opj_read_from_buffer_free);
opj_stream_set_user_data_length(l_stream, p_file->len);
opj_stream_set_read_function(l_stream, opj_read_from_buffer);
#if 0 /* UNUSED */
opj_stream_set_write_function(l_stream, opj_write_from_buffer);
#endif
opj_stream_set_skip_function(l_stream, opj_skip_from_buffer);
opj_stream_set_seek_function(l_stream, opj_seek_from_buffer);
return l_stream;
}
opj_stream_t* fx_opj_stream_create_memory_stream(DecodeData* data,
OPJ_SIZE_T p_size,
OPJ_BOOL p_is_read_stream) {
opj_stream_t* l_stream = 00;
if (!data || !data->src_data || data->src_size <= 0) {
return nullptr;
}
l_stream = opj_stream_create(p_size, p_is_read_stream);
if (!l_stream) {
return nullptr;
}
opj_stream_set_user_data(l_stream, data, nullptr);
opj_stream_set_user_data_length(l_stream, data->src_size);
opj_stream_set_read_function(l_stream, opj_read_from_memory);
opj_stream_set_write_function(l_stream, opj_write_from_memory);
opj_stream_set_skip_function(l_stream, opj_skip_from_memory);
opj_stream_set_seek_function(l_stream, opj_seek_from_memory);
return l_stream;
}
opj_stream_t* OPJ_CALLCONV opj_stream_create_file_stream(
const char *fname,
OPJ_SIZE_T p_size,
OPJ_BOOL p_is_read_stream)
{
opj_stream_t* l_stream = 00;
FILE *p_file;
const char *mode;
if (! fname) {
return NULL;
}
if (p_is_read_stream) {
mode = "rb";
} else {
mode = "wb";
}
p_file = fopen(fname, mode);
if (! p_file) {
return NULL;
}
l_stream = opj_stream_create(p_size, p_is_read_stream);
if (! l_stream) {
fclose(p_file);
return NULL;
}
opj_stream_set_user_data(l_stream, p_file,
(opj_stream_free_user_data_fn) fclose);
opj_stream_set_user_data_length(l_stream,
opj_get_data_length_from_file(p_file));
opj_stream_set_read_function(l_stream, (opj_stream_read_fn) opj_read_from_file);
opj_stream_set_write_function(l_stream,
(opj_stream_write_fn) opj_write_from_file);
opj_stream_set_skip_function(l_stream, (opj_stream_skip_fn) opj_skip_from_file);
opj_stream_set_seek_function(l_stream, (opj_stream_seek_fn) opj_seek_from_file);
return l_stream;
}
opj_stream_t* OPJ_CALLCONV opj_stream_create_file_stream (FILE * p_file,OPJ_UINT32 p_size,bool p_is_read_stream)
{
opj_stream_t* l_stream = 00;
if
(! p_file)
{
return 00;
}
l_stream = opj_stream_create(p_size,p_is_read_stream);
if
(! l_stream)
{
return 00;
}
opj_stream_set_user_data(l_stream,p_file);
opj_stream_set_read_function(l_stream,(opj_stream_read_fn) opj_read_from_file);
opj_stream_set_write_function(l_stream, (opj_stream_write_fn) opj_write_from_file);
opj_stream_set_skip_function(l_stream, (opj_stream_skip_fn) opj_skip_from_file);
opj_stream_set_seek_function(l_stream, (opj_stream_seek_fn) opj_seek_from_file);
return l_stream;
}
opj_stream_t* OPJ_CALLCONV opj_stream_create_file_stream ( FILE * p_file,
OPJ_SIZE_T p_size,
OPJ_BOOL p_is_read_stream)
{
opj_stream_t* l_stream = 00;
if (! p_file) {
return NULL;
}
l_stream = opj_stream_create(p_size,p_is_read_stream);
if (! l_stream) {
return NULL;
}
opj_stream_set_user_data(l_stream, p_file);
opj_stream_set_user_data_length(l_stream, opj_get_data_length_from_file(p_file));
opj_stream_set_read_function(l_stream, (opj_stream_read_fn) opj_read_from_file);
opj_stream_set_write_function(l_stream, (opj_stream_write_fn) opj_write_from_file);
opj_stream_set_skip_function(l_stream, (opj_stream_skip_fn) opj_skip_from_file);
opj_stream_set_seek_function(l_stream, (opj_stream_seek_fn) opj_seek_from_file);
return l_stream;
}
static GstFlowReturn
gst_openjpeg_enc_handle_frame (GstVideoEncoder * encoder,
GstVideoCodecFrame * frame)
{
GstOpenJPEGEnc *self = GST_OPENJPEG_ENC (encoder);
GstFlowReturn ret = GST_FLOW_OK;
#ifdef HAVE_OPENJPEG_1
opj_cinfo_t *enc;
GstMapInfo map;
guint length;
opj_cio_t *io;
#else
opj_codec_t *enc;
opj_stream_t *stream;
MemStream mstream;
#endif
opj_image_t *image;
GstVideoFrame vframe;
GST_DEBUG_OBJECT (self, "Handling frame");
enc = opj_create_compress (self->codec_format);
if (!enc)
goto initialization_error;
#ifdef HAVE_OPENJPEG_1
if (G_UNLIKELY (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >=
GST_LEVEL_TRACE)) {
opj_event_mgr_t callbacks;
callbacks.error_handler = gst_openjpeg_enc_opj_error;
callbacks.warning_handler = gst_openjpeg_enc_opj_warning;
callbacks.info_handler = gst_openjpeg_enc_opj_info;
opj_set_event_mgr ((opj_common_ptr) enc, &callbacks, self);
} else {
opj_set_event_mgr ((opj_common_ptr) enc, NULL, NULL);
}
#else
if (G_UNLIKELY (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >=
GST_LEVEL_TRACE)) {
opj_set_info_handler (enc, gst_openjpeg_enc_opj_info, self);
opj_set_warning_handler (enc, gst_openjpeg_enc_opj_warning, self);
opj_set_error_handler (enc, gst_openjpeg_enc_opj_error, self);
} else {
opj_set_info_handler (enc, NULL, NULL);
opj_set_warning_handler (enc, NULL, NULL);
opj_set_error_handler (enc, NULL, NULL);
}
#endif
if (!gst_video_frame_map (&vframe, &self->input_state->info,
frame->input_buffer, GST_MAP_READ))
goto map_read_error;
image = gst_openjpeg_enc_fill_image (self, &vframe);
if (!image)
goto fill_image_error;
gst_video_frame_unmap (&vframe);
opj_setup_encoder (enc, &self->params, image);
#ifdef HAVE_OPENJPEG_1
io = opj_cio_open ((opj_common_ptr) enc, NULL, 0);
if (!io)
goto open_error;
if (!opj_encode (enc, io, image, NULL))
goto encode_error;
opj_image_destroy (image);
length = cio_tell (io);
ret =
gst_video_encoder_allocate_output_frame (encoder, frame,
length + (self->is_jp2c ? 8 : 0));
if (ret != GST_FLOW_OK)
goto allocate_error;
gst_buffer_fill (frame->output_buffer, self->is_jp2c ? 8 : 0, io->buffer,
length);
if (self->is_jp2c) {
gst_buffer_map (frame->output_buffer, &map, GST_MAP_WRITE);
GST_WRITE_UINT32_BE (map.data, length + 8);
GST_WRITE_UINT32_BE (map.data + 4, GST_MAKE_FOURCC ('j', 'p', '2', 'c'));
gst_buffer_unmap (frame->output_buffer, &map);
}
opj_cio_close (io);
opj_destroy_compress (enc);
#else
stream = opj_stream_create (4096, OPJ_FALSE);
if (!stream)
goto open_error;
mstream.allocsize = 4096;
mstream.data = g_malloc (mstream.allocsize);
mstream.offset = 0;
mstream.size = 0;
opj_stream_set_read_function (stream, read_fn);
opj_stream_set_write_function (stream, write_fn);
opj_stream_set_skip_function (stream, skip_fn);
opj_stream_set_seek_function (stream, seek_fn);
opj_stream_set_user_data (stream, &mstream);
opj_stream_set_user_data_length (stream, mstream.size);
if (!opj_start_compress (enc, image, stream))
goto encode_error;
if (!opj_encode (enc, stream))
goto encode_error;
if (!opj_end_compress (enc, stream))
goto encode_error;
opj_image_destroy (image);
opj_stream_destroy (stream);
opj_destroy_codec (enc);
frame->output_buffer = gst_buffer_new ();
if (self->is_jp2c) {
GstMapInfo map;
GstMemory *mem;
mem = gst_allocator_alloc (NULL, 8, NULL);
gst_memory_map (mem, &map, GST_MAP_WRITE);
GST_WRITE_UINT32_BE (map.data, mstream.size + 8);
GST_WRITE_UINT32_BE (map.data + 4, GST_MAKE_FOURCC ('j', 'p', '2', 'c'));
gst_memory_unmap (mem, &map);
gst_buffer_append_memory (frame->output_buffer, mem);
}
gst_buffer_append_memory (frame->output_buffer,
gst_memory_new_wrapped (0, mstream.data, mstream.allocsize, 0,
mstream.size, NULL, (GDestroyNotify) g_free));
#endif
ret = gst_video_encoder_finish_frame (encoder, frame);
return ret;
initialization_error:
{
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, LIBRARY, INIT,
("Failed to initialize OpenJPEG encoder"), (NULL));
return GST_FLOW_ERROR;
}
map_read_error:
{
#ifdef HAVE_OPENJPEG_1
opj_destroy_compress (enc);
#else
opj_destroy_codec (enc);
#endif
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, FAILED,
("Failed to map input buffer"), (NULL));
return GST_FLOW_ERROR;
}
fill_image_error:
{
#ifdef HAVE_OPENJPEG_1
opj_destroy_compress (enc);
#else
opj_destroy_codec (enc);
#endif
gst_video_frame_unmap (&vframe);
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, LIBRARY, INIT,
("Failed to fill OpenJPEG image"), (NULL));
return GST_FLOW_ERROR;
}
open_error:
{
opj_image_destroy (image);
#ifdef HAVE_OPENJPEG_1
opj_destroy_compress (enc);
#else
opj_destroy_codec (enc);
#endif
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, LIBRARY, INIT,
("Failed to open OpenJPEG data"), (NULL));
return GST_FLOW_ERROR;
}
encode_error:
{
#ifdef HAVE_OPENJPEG_1
opj_cio_close (io);
opj_image_destroy (image);
opj_destroy_compress (enc);
#else
opj_stream_destroy (stream);
g_free (mstream.data);
opj_image_destroy (image);
opj_destroy_codec (enc);
#endif
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, STREAM, ENCODE,
("Failed to encode OpenJPEG stream"), (NULL));
return GST_FLOW_ERROR;
}
#ifdef HAVE_OPENJPEG_1
allocate_error:
{
opj_cio_close (io);
opj_destroy_compress (enc);
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, FAILED,
("Failed to allocate output buffer"), (NULL));
return ret;
}
#endif
}
static Image *ReadJP2Image(const ImageInfo *image_info,ExceptionInfo *exception)
{
const char
*option;
Image
*image;
int
jp2_status;
MagickBooleanType
status;
opj_codec_t
*jp2_codec;
opj_codestream_index_t
*codestream_index = (opj_codestream_index_t *) NULL;
opj_dparameters_t
parameters;
opj_image_t
*jp2_image;
opj_stream_t
*jp2_stream;
register ssize_t
i;
ssize_t
y;
unsigned char
sans[4];
/*
Open image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickCoreSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
image=AcquireImage(image_info,exception);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
/*
Initialize JP2 codec.
*/
if (ReadBlob(image,4,sans) != 4)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
(void) SeekBlob(image,SEEK_SET,0);
if (LocaleCompare(image_info->magick,"JPT") == 0)
jp2_codec=opj_create_decompress(OPJ_CODEC_JPT);
else
if (IsJ2K(sans,4) != MagickFalse)
jp2_codec=opj_create_decompress(OPJ_CODEC_J2K);
else
jp2_codec=opj_create_decompress(OPJ_CODEC_JP2);
opj_set_warning_handler(jp2_codec,JP2WarningHandler,exception);
opj_set_error_handler(jp2_codec,JP2ErrorHandler,exception);
opj_set_default_decoder_parameters(¶meters);
option=GetImageOption(image_info,"jp2:reduce-factor");
if (option != (const char *) NULL)
parameters.cp_reduce=StringToInteger(option);
option=GetImageOption(image_info,"jp2:quality-layers");
if (option != (const char *) NULL)
parameters.cp_layer=StringToInteger(option);
if (opj_setup_decoder(jp2_codec,¶meters) == 0)
{
opj_destroy_codec(jp2_codec);
ThrowReaderException(DelegateError,"UnableToManageJP2Stream");
}
jp2_stream=opj_stream_create(OPJ_J2K_STREAM_CHUNK_SIZE,1);
opj_stream_set_read_function(jp2_stream,JP2ReadHandler);
opj_stream_set_write_function(jp2_stream,JP2WriteHandler);
opj_stream_set_seek_function(jp2_stream,JP2SeekHandler);
opj_stream_set_skip_function(jp2_stream,JP2SkipHandler);
opj_stream_set_user_data(jp2_stream,image,NULL);
opj_stream_set_user_data_length(jp2_stream,GetBlobSize(image));
if (opj_read_header(jp2_stream,jp2_codec,&jp2_image) == 0)
{
opj_stream_destroy(jp2_stream);
opj_destroy_codec(jp2_codec);
ThrowReaderException(DelegateError,"UnableToDecodeImageFile");
}
jp2_status=1;
if ((image->columns != 0) && (image->rows != 0))
{
/*
Extract an area from the image.
*/
jp2_status=opj_set_decode_area(jp2_codec,jp2_image,
(OPJ_INT32) image->extract_info.x,(OPJ_INT32) image->extract_info.y,
(OPJ_INT32) (image->extract_info.x+(ssize_t) image->columns),
(OPJ_INT32) (image->extract_info.y+(ssize_t) image->rows));
if (jp2_status == 0)
{
opj_stream_destroy(jp2_stream);
opj_destroy_codec(jp2_codec);
opj_image_destroy(jp2_image);
ThrowReaderException(DelegateError,"UnableToDecodeImageFile");
}
}
if ((image_info->number_scenes != 0) && (image_info->scene != 0))
jp2_status=opj_get_decoded_tile(jp2_codec,jp2_stream,jp2_image,
(unsigned int) image_info->scene-1);
else
if (image->ping == MagickFalse)
{
jp2_status=opj_decode(jp2_codec,jp2_stream,jp2_image);
if (jp2_status != 0)
jp2_status=opj_end_decompress(jp2_codec,jp2_stream);
}
if (jp2_status == 0)
{
opj_stream_destroy(jp2_stream);
opj_destroy_codec(jp2_codec);
opj_image_destroy(jp2_image);
ThrowReaderException(DelegateError,"UnableToDecodeImageFile");
}
opj_stream_destroy(jp2_stream);
for (i=0; i < (ssize_t) jp2_image->numcomps; i++)
{
if ((jp2_image->comps[i].dx == 0) || (jp2_image->comps[i].dy == 0))
{
opj_destroy_codec(jp2_codec);
opj_image_destroy(jp2_image);
ThrowReaderException(CoderError,"IrregularChannelGeometryNotSupported")
}
}
static int
j2k_encode_entry(Imaging im, ImagingCodecState state,
ImagingIncrementalCodec encoder)
{
JPEG2KENCODESTATE *context = (JPEG2KENCODESTATE *)state->context;
opj_stream_t *stream = NULL;
opj_image_t *image = NULL;
opj_codec_t *codec = NULL;
opj_cparameters_t params;
unsigned components;
OPJ_COLOR_SPACE color_space;
opj_image_cmptparm_t image_params[4];
unsigned xsiz, ysiz;
unsigned tile_width, tile_height;
unsigned tiles_x, tiles_y, num_tiles;
unsigned x, y, tile_ndx;
unsigned n;
j2k_pack_tile_t pack;
int ret = -1;
stream = opj_stream_default_create(OPJ_FALSE);
if (!stream) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
opj_stream_set_write_function(stream, j2k_write);
opj_stream_set_skip_function(stream, j2k_skip);
opj_stream_set_seek_function(stream, j2k_seek);
opj_stream_set_user_data(stream, encoder);
/* Setup an opj_image */
if (strcmp (im->mode, "L") == 0) {
components = 1;
color_space = OPJ_CLRSPC_GRAY;
pack = j2k_pack_l;
} else if (strcmp (im->mode, "LA") == 0) {
components = 2;
color_space = OPJ_CLRSPC_GRAY;
pack = j2k_pack_la;
} else if (strcmp (im->mode, "RGB") == 0) {
components = 3;
color_space = OPJ_CLRSPC_SRGB;
pack = j2k_pack_rgb;
} else if (strcmp (im->mode, "YCbCr") == 0) {
components = 3;
color_space = OPJ_CLRSPC_SYCC;
pack = j2k_pack_rgb;
} else if (strcmp (im->mode, "RGBA") == 0) {
components = 4;
color_space = OPJ_CLRSPC_SRGB;
pack = j2k_pack_rgba;
} else {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
for (n = 0; n < components; ++n) {
image_params[n].dx = image_params[n].dy = 1;
image_params[n].w = im->xsize;
image_params[n].h = im->ysize;
image_params[n].x0 = image_params[n].y0 = 0;
image_params[n].prec = 8;
image_params[n].bpp = 8;
image_params[n].sgnd = 0;
}
image = opj_image_create(components, image_params, color_space);
/* Setup compression context */
context->error_msg = NULL;
opj_set_default_encoder_parameters(¶ms);
params.image_offset_x0 = context->offset_x;
params.image_offset_y0 = context->offset_y;
if (context->tile_size_x && context->tile_size_y) {
params.tile_size_on = OPJ_TRUE;
params.cp_tx0 = context->tile_offset_x;
params.cp_ty0 = context->tile_offset_y;
params.cp_tdx = context->tile_size_x;
params.cp_tdy = context->tile_size_y;
tile_width = params.cp_tdx;
tile_height = params.cp_tdy;
} else {
params.cp_tx0 = 0;
params.cp_ty0 = 0;
params.cp_tdx = 1;
params.cp_tdy = 1;
tile_width = im->xsize;
tile_height = im->ysize;
}
if (context->quality_layers && PySequence_Check(context->quality_layers)) {
Py_ssize_t len = PySequence_Length(context->quality_layers);
Py_ssize_t n;
float *pq;
if (len) {
if (len > sizeof(params.tcp_rates) / sizeof(params.tcp_rates[0]))
len = sizeof(params.tcp_rates)/sizeof(params.tcp_rates[0]);
params.tcp_numlayers = (int)len;
if (context->quality_is_in_db) {
params.cp_disto_alloc = params.cp_fixed_alloc = 0;
params.cp_fixed_quality = 1;
pq = params.tcp_distoratio;
} else {
params.cp_disto_alloc = 1;
params.cp_fixed_alloc = params.cp_fixed_quality = 0;
pq = params.tcp_rates;
}
for (n = 0; n < len; ++n) {
PyObject *obj = PySequence_ITEM(context->quality_layers, n);
pq[n] = PyFloat_AsDouble(obj);
}
}
} else {
params.tcp_numlayers = 1;
params.tcp_rates[0] = 0;
params.cp_disto_alloc = 1;
}
if (context->num_resolutions)
params.numresolution = context->num_resolutions;
if (context->cblk_width >= 4 && context->cblk_width <= 1024
&& context->cblk_height >= 4 && context->cblk_height <= 1024
&& context->cblk_width * context->cblk_height <= 4096) {
params.cblockw_init = context->cblk_width;
params.cblockh_init = context->cblk_height;
}
if (context->precinct_width >= 4 && context->precinct_height >= 4
&& context->precinct_width >= context->cblk_width
&& context->precinct_height > context->cblk_height) {
params.prcw_init[0] = context->precinct_width;
params.prch_init[0] = context->precinct_height;
params.res_spec = 1;
params.csty |= 0x01;
}
params.irreversible = context->irreversible;
params.prog_order = context->progression;
params.cp_cinema = context->cinema_mode;
switch (params.cp_cinema) {
case OPJ_OFF:
params.cp_rsiz = OPJ_STD_RSIZ;
break;
case OPJ_CINEMA2K_24:
case OPJ_CINEMA2K_48:
params.cp_rsiz = OPJ_CINEMA2K;
if (params.numresolution > 6)
params.numresolution = 6;
break;
case OPJ_CINEMA4K_24:
params.cp_rsiz = OPJ_CINEMA4K;
if (params.numresolution > 7)
params.numresolution = 7;
break;
}
if (context->cinema_mode != OPJ_OFF)
j2k_set_cinema_params(im, components, ¶ms);
/* Set up the reference grid in the image */
image->x0 = params.image_offset_x0;
image->y0 = params.image_offset_y0;
image->x1 = xsiz = im->xsize + params.image_offset_x0;
image->y1 = ysiz = im->ysize + params.image_offset_y0;
/* Create the compressor */
codec = opj_create_compress(context->format);
if (!codec) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
opj_set_error_handler(codec, j2k_error, context);
opj_setup_encoder(codec, ¶ms, image);
/* Start encoding */
if (!opj_start_compress(codec, image, stream)) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
/* Write each tile */
tiles_x = (im->xsize + (params.image_offset_x0 - params.cp_tx0)
+ tile_width - 1) / tile_width;
tiles_y = (im->ysize + (params.image_offset_y0 - params.cp_ty0)
+ tile_height - 1) / tile_height;
num_tiles = tiles_x * tiles_y;
state->buffer = malloc (tile_width * tile_height * components);
tile_ndx = 0;
for (y = 0; y < tiles_y; ++y) {
unsigned ty0 = params.cp_ty0 + y * tile_height;
unsigned ty1 = ty0 + tile_height;
unsigned pixy, pixh;
if (ty0 < params.image_offset_y0)
ty0 = params.image_offset_y0;
if (ty1 > ysiz)
ty1 = ysiz;
pixy = ty0 - params.image_offset_y0;
pixh = ty1 - ty0;
for (x = 0; x < tiles_x; ++x) {
unsigned tx0 = params.cp_tx0 + x * tile_width;
unsigned tx1 = tx0 + tile_width;
unsigned pixx, pixw;
unsigned data_size;
if (tx0 < params.image_offset_x0)
tx0 = params.image_offset_x0;
if (tx1 > xsiz)
tx1 = xsiz;
pixx = tx0 - params.image_offset_x0;
pixw = tx1 - tx0;
pack(im, state->buffer, pixx, pixy, pixw, pixh);
data_size = pixw * pixh * components;
if (!opj_write_tile(codec, tile_ndx++, state->buffer,
data_size, stream)) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
}
}
if (!opj_end_compress(codec, stream)) {
state->errcode = IMAGING_CODEC_BROKEN;
state->state = J2K_STATE_FAILED;
goto quick_exit;
}
state->errcode = IMAGING_CODEC_END;
state->state = J2K_STATE_DONE;
ret = (int)ImagingIncrementalCodecBytesInBuffer(encoder);
quick_exit:
if (codec)
opj_destroy_codec(codec);
if (image)
opj_image_destroy(image);
if (stream)
opj_stream_destroy(stream);
return ret;
}
bool ossim::opj_decode( std::ifstream* in,
const ossimIrect& rect,
ossim_uint32 resLevel,
ossim_int32 format, // OPJ_CODEC_FORMAT
std::streamoff fileOffset,
ossimImageData* tile)
{
static const char MODULE[] = "ossimOpjDecoder::decode";
bool status = false;
if ( traceDebug() )
{
ossimNotify(ossimNotifyLevel_DEBUG)
<< MODULE << "entered...\nrect: " << rect
<< "\nresLevel: " << resLevel << std::endl;
}
// Need to check for NAN in rect
if ( in && tile && !rect.hasNans())
{
in->seekg( fileOffset, std::ios_base::beg );
opj_dparameters_t param;
opj_codec_t* codec = 0;
opj_image_t* image = 0;;
opj_stream_t* stream = 0;
opj_user_istream* userStream = new opj_user_istream();
userStream->m_str = in;
userStream->m_offset = fileOffset;
/* Set the length to avoid an assert */
in->seekg(0, std::ios_base::end);
// Fix: length must be passed in for nift blocks.
userStream->m_length = in->tellg();
// Set back to front:
in->clear();
in->seekg(fileOffset, std::ios_base::beg);
stream = opj_stream_default_create(OPJ_TRUE);
if (!stream)
{
opj_stream_destroy(stream);
std::string errMsg = MODULE;
errMsg += " ERROR: opj_setup_decoder failed!";
throw ossimException(errMsg);
}
opj_stream_set_read_function(stream, ossim_opj_istream_read);
opj_stream_set_skip_function(stream, ossim_opj_istream_skip);
opj_stream_set_seek_function(stream, ossim_opj_istream_seek);
// Fix: length must be passed in for nift blocks.
opj_stream_set_user_data_length(stream, userStream->m_length);
opj_stream_set_user_data(stream, userStream,
ossim_opj_free_user_istream_data);
opj_stream_set_user_data_length(stream, userStream->m_length);
/* Set the default decoding parameters */
opj_set_default_decoder_parameters(¶m);
param.decod_format = format;
/** you may here add custom decoding parameters */
/* do not use layer decoding limitations */
param.cp_layer = 0;
/* do not use resolutions reductions */
param.cp_reduce = resLevel;
codec = opj_create_decompress( (CODEC_FORMAT)format );
// catch events using our callbacks and give a local context
//opj_set_info_handler (codec, ossim::opj_info_callback, 00);
opj_set_info_handler (codec, NULL, 00);
opj_set_warning_handler(codec, ossim::opj_warning_callback,00);
opj_set_error_handler (codec, ossim::opj_error_callback, 00);
// Setup the decoder decoding parameters using user parameters
if ( opj_setup_decoder(codec, ¶m) == false )
{
opj_stream_destroy(stream);
opj_destroy_codec(codec);
std::string errMsg = MODULE;
errMsg += " ERROR: opj_setup_decoder failed!";
throw ossimException(errMsg);
}
// Read the main header of the codestream and if necessary the JP2 boxes.
if ( opj_read_header(stream, codec, &image) == false )
{
opj_stream_destroy(stream);
opj_destroy_codec(codec);
opj_image_destroy(image);
std::string errMsg = MODULE;
errMsg += " ERROR: opj_read_header failed!";
throw ossimException(errMsg);
}
// tmp drb:
// opj_stream_destroy(stream);
// return;
if ( opj_set_decoded_resolution_factor(codec, resLevel) == false)
{
opj_stream_destroy(stream);
opj_destroy_codec(codec);
opj_image_destroy(image);
std::string errMsg = MODULE;
errMsg += " ERROR: opj_set_decoded_resolution_factor failed!";
throw ossimException(errMsg);
}
//ossim_float32 res = resLevel;
ossimIrect resRect = rect * (1 << resLevel);
//std::cout << "resRect.ul(): " << resRect.ul()
// << "\nresRect.lr(): " << resRect.lr()
// << std::endl;
// if ( opj_set_decode_area(codec, image, rect.ul().x, rect.ul().y,
// rect.lr().x+1, rect.lr().y+1) == false )
if ( opj_set_decode_area(codec, image, resRect.ul().x, resRect.ul().y,
resRect.lr().x+1, resRect.lr().y+1) == false )
{
opj_stream_destroy(stream);
opj_destroy_codec(codec);
opj_image_destroy(image);
std::string errMsg = MODULE;
errMsg += " ERROR: opj_set_decode_area failed!";
throw ossimException(errMsg);
}
// Get the decoded image:
if ( opj_decode(codec, stream, image) == false )
{
opj_stream_destroy(stream);
opj_destroy_codec(codec);
opj_image_destroy(image);
std::string errMsg = MODULE;
errMsg += " ERROR: opj_decode failed!";
throw ossimException(errMsg);
}
// ossim::print(std::cout, *image);
if(image->icc_profile_buf) {
#if defined(OPJ_HAVE_LIBLCMS1) || defined(OPJ_HAVE_LIBLCMS2)
color_apply_icc_profile(image); /* FIXME */
#endif
free(image->icc_profile_buf);
image->icc_profile_buf = NULL; image->icc_profile_len = 0;
}
status = ossim::copyOpjImage(image, tile);
#if 0
ossim_uint32 tile_index = 0;
ossim_uint32 data_size = 0;
ossim_int32 current_tile_x0 = 0;
ossim_int32 current_tile_y0 = 0;
ossim_int32 current_tile_x1 = 0;
ossim_int32 current_tile_y1 = 0;
ossim_uint32 nb_comps = 0;
OPJ_BOOL go_on = 1;
if ( opj_read_tile_header( codec,
stream,
&tile_index,
&data_size,
¤t_tile_x0,
¤t_tile_y0,
¤t_tile_x1,
¤t_tile_y1,
&nb_comps,
&go_on) == false )
{
opj_stream_destroy(stream);
opj_destroy_codec(codec);
opj_image_destroy(image);
std::string errMsg = MODULE;
errMsg += " ERROR: opj_read_tile_header failed!";
throw ossimException(errMsg);
}
#endif
#if 0
std::cout << "tile_index: " << tile_index
<< "\ndata_size: " << data_size
<< "\ncurrent_tile_x0: " << current_tile_x0
<< "\ncurrent_tile_y0: " << current_tile_y0
<< "\ncurrent_tile_x1: " << current_tile_x1
<< "\ncurrent_tile_y1: " << current_tile_y1
<< "\nnb_comps: " << nb_comps
<< std::endl;
#endif
#if 0
if ( opj_decode_tile_data(codec, tile_index,l_data,l_data_size,l_stream) == false)
{
opj_stream_destroy(l_stream);
opj_destroy_codec(l_codec);
opj_image_destroy(l_image);
std::string errMsg = MODULE;
errMsg += " ERROR: opj_read_tile_header failed!";
throw ossimException(errMsg);
}
#endif
#if 0
if (opj_end_decompress(codec,stream) == false )
{
opj_stream_destroy(stream);
opj_destroy_codec(codec);
opj_image_destroy(image);
std::string errMsg = MODULE;
errMsg += " ERROR: opj_end_decompress failed!";
throw ossimException(errMsg);
}
#endif
/* Free memory */
opj_stream_destroy(stream);
opj_destroy_codec(codec);
opj_image_destroy(image);
// Tmp drb:
if ( in->eof() )
{
in->clear();
}
in->seekg(fileOffset, std::ios_base::beg );
} // Matches: if ( in && tile )
return status;
} // End: ossim::opj_decode( ... )
static GstFlowReturn
gst_openjpeg_dec_handle_frame (GstVideoDecoder * decoder,
GstVideoCodecFrame * frame)
{
GstOpenJPEGDec *self = GST_OPENJPEG_DEC (decoder);
GstFlowReturn ret = GST_FLOW_OK;
gint64 deadline;
GstMapInfo map;
#ifdef HAVE_OPENJPEG_1
opj_dinfo_t *dec;
opj_cio_t *io;
#else
opj_codec_t *dec;
opj_stream_t *stream;
MemStream mstream;
#endif
opj_image_t *image;
GstVideoFrame vframe;
opj_dparameters_t params;
GST_DEBUG_OBJECT (self, "Handling frame");
deadline = gst_video_decoder_get_max_decode_time (decoder, frame);
if (deadline < 0) {
GST_LOG_OBJECT (self, "Dropping too late frame: deadline %" G_GINT64_FORMAT,
deadline);
ret = gst_video_decoder_drop_frame (decoder, frame);
return ret;
}
dec = opj_create_decompress (self->codec_format);
if (!dec)
goto initialization_error;
#ifdef HAVE_OPENJPEG_1
if (G_UNLIKELY (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >=
GST_LEVEL_TRACE)) {
opj_event_mgr_t callbacks;
callbacks.error_handler = gst_openjpeg_dec_opj_error;
callbacks.warning_handler = gst_openjpeg_dec_opj_warning;
callbacks.info_handler = gst_openjpeg_dec_opj_info;
opj_set_event_mgr ((opj_common_ptr) dec, &callbacks, self);
} else {
opj_set_event_mgr ((opj_common_ptr) dec, NULL, NULL);
}
#else
if (G_UNLIKELY (gst_debug_category_get_threshold (GST_CAT_DEFAULT) >=
GST_LEVEL_TRACE)) {
opj_set_info_handler (dec, gst_openjpeg_dec_opj_info, self);
opj_set_warning_handler (dec, gst_openjpeg_dec_opj_warning, self);
opj_set_error_handler (dec, gst_openjpeg_dec_opj_error, self);
} else {
opj_set_info_handler (dec, NULL, NULL);
opj_set_warning_handler (dec, NULL, NULL);
opj_set_error_handler (dec, NULL, NULL);
}
#endif
params = self->params;
if (self->ncomps)
params.jpwl_exp_comps = self->ncomps;
opj_setup_decoder (dec, ¶ms);
if (!gst_buffer_map (frame->input_buffer, &map, GST_MAP_READ))
goto map_read_error;
#ifdef HAVE_OPENJPEG_1
io = opj_cio_open ((opj_common_ptr) dec, map.data + (self->is_jp2c ? 8 : 0),
map.size - (self->is_jp2c ? 8 : 0));
if (!io)
goto open_error;
image = opj_decode (dec, io);
if (!image)
goto decode_error;
#else
stream = opj_stream_create (4096, OPJ_TRUE);
if (!stream)
goto open_error;
mstream.data = map.data + (self->is_jp2c ? 8 : 0);
mstream.offset = 0;
mstream.size = map.size - (self->is_jp2c ? 8 : 0);
opj_stream_set_read_function (stream, read_fn);
opj_stream_set_write_function (stream, write_fn);
opj_stream_set_skip_function (stream, skip_fn);
opj_stream_set_seek_function (stream, seek_fn);
opj_stream_set_user_data (stream, &mstream);
opj_stream_set_user_data_length (stream, mstream.size);
image = NULL;
if (!opj_read_header (stream, dec, &image))
goto decode_error;
if (!opj_decode (dec, stream, image))
goto decode_error;
#endif
gst_buffer_unmap (frame->input_buffer, &map);
ret = gst_openjpeg_dec_negotiate (self, image);
if (ret != GST_FLOW_OK)
goto negotiate_error;
ret = gst_video_decoder_allocate_output_frame (decoder, frame);
if (ret != GST_FLOW_OK)
goto allocate_error;
if (!gst_video_frame_map (&vframe, &self->output_state->info,
frame->output_buffer, GST_MAP_WRITE))
goto map_write_error;
self->fill_frame (&vframe, image);
gst_video_frame_unmap (&vframe);
#ifdef HAVE_OPENJPEG_1
opj_cio_close (io);
opj_image_destroy (image);
opj_destroy_decompress (dec);
#else
opj_end_decompress (dec, stream);
opj_stream_destroy (stream);
opj_image_destroy (image);
opj_destroy_codec (dec);
#endif
ret = gst_video_decoder_finish_frame (decoder, frame);
return ret;
initialization_error:
{
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, LIBRARY, INIT,
("Failed to initialize OpenJPEG decoder"), (NULL));
return GST_FLOW_ERROR;
}
map_read_error:
{
#ifdef HAVE_OPENJPEG_1
opj_destroy_decompress (dec);
#else
opj_destroy_codec (dec);
#endif
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, FAILED,
("Failed to map input buffer"), (NULL));
return GST_FLOW_ERROR;
}
open_error:
{
#ifdef HAVE_OPENJPEG_1
opj_destroy_decompress (dec);
#else
opj_destroy_codec (dec);
#endif
gst_buffer_unmap (frame->input_buffer, &map);
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, LIBRARY, INIT,
("Failed to open OpenJPEG stream"), (NULL));
return GST_FLOW_ERROR;
}
decode_error:
{
if (image)
opj_image_destroy (image);
#ifdef HAVE_OPENJPEG_1
opj_cio_close (io);
opj_destroy_decompress (dec);
#else
opj_stream_destroy (stream);
opj_destroy_codec (dec);
#endif
gst_buffer_unmap (frame->input_buffer, &map);
gst_video_codec_frame_unref (frame);
GST_VIDEO_DECODER_ERROR (self, 1, STREAM, DECODE,
("Failed to decode OpenJPEG stream"), (NULL), ret);
return ret;
}
negotiate_error:
{
opj_image_destroy (image);
#ifdef HAVE_OPENJPEG_1
opj_cio_close (io);
opj_destroy_decompress (dec);
#else
opj_stream_destroy (stream);
opj_destroy_codec (dec);
#endif
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, NEGOTIATION,
("Failed to negotiate"), (NULL));
return ret;
}
allocate_error:
{
opj_image_destroy (image);
#ifdef HAVE_OPENJPEG_1
opj_cio_close (io);
opj_destroy_decompress (dec);
#else
opj_stream_destroy (stream);
opj_destroy_codec (dec);
#endif
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, FAILED,
("Failed to allocate output buffer"), (NULL));
return ret;
}
map_write_error:
{
opj_image_destroy (image);
#ifdef HAVE_OPENJPEG_1
opj_cio_close (io);
opj_destroy_decompress (dec);
#else
opj_stream_destroy (stream);
opj_destroy_codec (dec);
#endif
gst_video_codec_frame_unref (frame);
GST_ELEMENT_ERROR (self, CORE, FAILED,
("Failed to map output buffer"), (NULL));
return GST_FLOW_ERROR;
}
}
fz_pixmap *
fz_load_jpx(fz_context *ctx, unsigned char *data, int size, fz_colorspace *defcs, int indexed)
{
fz_pixmap *img;
fz_colorspace *origcs;
opj_dparameters_t params;
opj_codec_t *codec;
opj_image_t *jpx;
opj_stream_t *stream;
fz_colorspace *colorspace;
unsigned char *p;
OPJ_CODEC_FORMAT format;
int a, n, w, h, depth, sgnd;
int x, y, k, v;
stream_block sb;
if (size < 2)
fz_throw(ctx, FZ_ERROR_GENERIC, "not enough data to determine image format");
/* Check for SOC marker -- if found we have a bare J2K stream */
if (data[0] == 0xFF && data[1] == 0x4F)
format = OPJ_CODEC_J2K;
else
format = OPJ_CODEC_JP2;
opj_set_default_decoder_parameters(¶ms);
if (indexed)
params.flags |= OPJ_DPARAMETERS_IGNORE_PCLR_CMAP_CDEF_FLAG;
codec = opj_create_decompress(format);
opj_set_info_handler(codec, fz_opj_info_callback, ctx);
opj_set_warning_handler(codec, fz_opj_warning_callback, ctx);
opj_set_error_handler(codec, fz_opj_error_callback, ctx);
if (!opj_setup_decoder(codec, ¶ms))
{
fz_throw(ctx, FZ_ERROR_GENERIC, "j2k decode failed");
}
stream = opj_stream_default_create(OPJ_TRUE);
sb.data = data;
sb.pos = 0;
sb.size = size;
opj_stream_set_read_function(stream, fz_opj_stream_read);
opj_stream_set_skip_function(stream, fz_opj_stream_skip);
opj_stream_set_seek_function(stream, fz_opj_stream_seek);
opj_stream_set_user_data(stream, &sb);
/* Set the length to avoid an assert */
opj_stream_set_user_data_length(stream, size);
if (!opj_read_header(stream, codec, &jpx))
{
opj_stream_destroy(stream);
opj_destroy_codec(codec);
fz_throw(ctx, FZ_ERROR_GENERIC, "Failed to read JPX header");
}
if (!opj_decode(codec, stream, jpx))
{
opj_stream_destroy(stream);
opj_destroy_codec(codec);
opj_image_destroy(jpx);
fz_throw(ctx, FZ_ERROR_GENERIC, "Failed to decode JPX image");
}
opj_stream_destroy(stream);
opj_destroy_codec(codec);
/* jpx should never be NULL here, but check anyway */
if (!jpx)
fz_throw(ctx, FZ_ERROR_GENERIC, "opj_decode failed");
for (k = 1; k < (int)jpx->numcomps; k++)
{
if (!jpx->comps[k].data)
{
opj_image_destroy(jpx);
fz_throw(ctx, FZ_ERROR_GENERIC, "image components are missing data");
}
if (jpx->comps[k].w != jpx->comps[0].w)
{
opj_image_destroy(jpx);
fz_throw(ctx, FZ_ERROR_GENERIC, "image components have different width");
}
if (jpx->comps[k].h != jpx->comps[0].h)
{
opj_image_destroy(jpx);
fz_throw(ctx, FZ_ERROR_GENERIC, "image components have different height");
}
if (jpx->comps[k].prec != jpx->comps[0].prec)
{
opj_image_destroy(jpx);
fz_throw(ctx, FZ_ERROR_GENERIC, "image components have different precision");
}
}
n = jpx->numcomps;
w = jpx->comps[0].w;
h = jpx->comps[0].h;
depth = jpx->comps[0].prec;
sgnd = jpx->comps[0].sgnd;
if (jpx->color_space == OPJ_CLRSPC_SRGB && n == 4) { n = 3; a = 1; }
else if (jpx->color_space == OPJ_CLRSPC_SYCC && n == 4) { n = 3; a = 1; }
else if (n == 2) { n = 1; a = 1; }
else if (n > 4) { n = 4; a = 1; }
else { a = 0; }
origcs = defcs;
if (defcs)
{
if (defcs->n == n)
{
colorspace = defcs;
}
else
{
fz_warn(ctx, "jpx file and dict colorspaces do not match");
defcs = NULL;
}
}
if (!defcs)
{
switch (n)
{
case 1: colorspace = fz_device_gray(ctx); break;
case 3: colorspace = fz_device_rgb(ctx); break;
case 4: colorspace = fz_device_cmyk(ctx); break;
}
}
fz_try(ctx)
{
img = fz_new_pixmap(ctx, colorspace, w, h);
}
fz_catch(ctx)
{
opj_image_destroy(jpx);
fz_rethrow_message(ctx, "out of memory loading jpx");
}
p = img->samples;
for (y = 0; y < h; y++)
{
for (x = 0; x < w; x++)
{
for (k = 0; k < n + a; k++)
{
v = jpx->comps[k].data[y * w + x];
if (sgnd)
v = v + (1 << (depth - 1));
if (depth > 8)
v = v >> (depth - 8);
*p++ = v;
}
if (!a)
*p++ = 255;
}
}
opj_image_destroy(jpx);
if (a)
{
if (n == 4)
{
fz_pixmap *tmp = fz_new_pixmap(ctx, fz_device_rgb(ctx), w, h);
fz_convert_pixmap(ctx, tmp, img);
fz_drop_pixmap(ctx, img);
img = tmp;
}
fz_premultiply_pixmap(ctx, img);
}
if (origcs != defcs)
{
fz_pixmap *tmp = fz_new_pixmap(ctx, origcs, w, h);
fz_convert_pixmap(ctx, tmp, img);
fz_drop_pixmap(ctx, img);
img = tmp;
}
return img;
}
