diff options
author | Peter Schlaile <peter@schlaile.de> | 2008-06-03 01:35:57 +0400 |
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committer | Peter Schlaile <peter@schlaile.de> | 2008-06-03 01:35:57 +0400 |
commit | ca8aa8c901934dc0e3eb1b65618d40bfb65f9111 (patch) | |
tree | 72e3ea5d2f5e224a683e064d34f6ee47eff90c59 /extern/libopenjpeg/jp2.c | |
parent | 8a5f36219214b4a5b8348b8e200ef5aac2297963 (diff) |
== RED one (redcode) ==
This adds redcode (the file format of RED one, R3D) support to blender.
Seems to work fine with the footage I found on the web, but keep in
mind, that because of the unoptimized nature of libopenjpeg, frame
decoding isn't that fast.
It is also a rather challenging task, to make 4k-float-footage realtime :)
Diffstat (limited to 'extern/libopenjpeg/jp2.c')
-rw-r--r-- | extern/libopenjpeg/jp2.c | 710 |
1 files changed, 710 insertions, 0 deletions
diff --git a/extern/libopenjpeg/jp2.c b/extern/libopenjpeg/jp2.c new file mode 100644 index 00000000000..14f9493c401 --- /dev/null +++ b/extern/libopenjpeg/jp2.c @@ -0,0 +1,710 @@ +/* + * Copyright (c) 2002-2007, Communications and Remote Sensing Laboratory, Universite catholique de Louvain (UCL), Belgium + * Copyright (c) 2002-2007, Professor Benoit Macq + * Copyright (c) 2001-2003, David Janssens + * Copyright (c) 2002-2003, Yannick Verschueren + * Copyright (c) 2003-2007, Francois-Olivier Devaux and Antonin Descampe + * Copyright (c) 2005, Herve Drolon, FreeImage Team + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS `AS IS' + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#include "opj_includes.h" + +/** @defgroup JP2 JP2 - JPEG-2000 file format reader/writer */ +/*@{*/ + +/** @name Local static functions */ +/*@{*/ + +/** +Read box headers +@param cinfo Codec context info +@param cio Input stream +@param box +@return Returns true if successful, returns false otherwise +*/ +static bool jp2_read_boxhdr(opj_common_ptr cinfo, opj_cio_t *cio, opj_jp2_box_t *box); +/*static void jp2_write_url(opj_cio_t *cio, char *Idx_file);*/ +/** +Read the IHDR box - Image Header box +@param jp2 JP2 handle +@param cio Input buffer stream +@return Returns true if successful, returns false otherwise +*/ +static bool jp2_read_ihdr(opj_jp2_t *jp2, opj_cio_t *cio); +static void jp2_write_ihdr(opj_jp2_t *jp2, opj_cio_t *cio); +static void jp2_write_bpcc(opj_jp2_t *jp2, opj_cio_t *cio); +static bool jp2_read_bpcc(opj_jp2_t *jp2, opj_cio_t *cio); +static void jp2_write_colr(opj_jp2_t *jp2, opj_cio_t *cio); +static bool jp2_read_colr(opj_jp2_t *jp2, opj_cio_t *cio); +/** +Write the FTYP box - File type box +@param jp2 JP2 handle +@param cio Output buffer stream +*/ +static void jp2_write_ftyp(opj_jp2_t *jp2, opj_cio_t *cio); +/** +Read the FTYP box - File type box +@param jp2 JP2 handle +@param cio Input buffer stream +@return Returns true if successful, returns false otherwise +*/ +static bool jp2_read_ftyp(opj_jp2_t *jp2, opj_cio_t *cio); +static int jp2_write_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info); +static bool jp2_read_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, unsigned int *j2k_codestream_length, unsigned int *j2k_codestream_offset); +static void jp2_write_jp(opj_cio_t *cio); +/** +Read the JP box - JPEG 2000 signature +@param jp2 JP2 handle +@param cio Input buffer stream +@return Returns true if successful, returns false otherwise +*/ +static bool jp2_read_jp(opj_jp2_t *jp2, opj_cio_t *cio); +/** +Decode the structure of a JP2 file +@param jp2 JP2 handle +@param cio Input buffer stream +@return Returns true if successful, returns false otherwise +*/ +static bool jp2_read_struct(opj_jp2_t *jp2, opj_cio_t *cio); + +/*@}*/ + +/*@}*/ + +/* ----------------------------------------------------------------------- */ + +static bool jp2_read_boxhdr(opj_common_ptr cinfo, opj_cio_t *cio, opj_jp2_box_t *box) { + box->init_pos = cio_tell(cio); + box->length = cio_read(cio, 4); + box->type = cio_read(cio, 4); + if (box->length == 1) { + if (cio_read(cio, 4) != 0) { + opj_event_msg(cinfo, EVT_ERROR, "Cannot handle box sizes higher than 2^32\n"); + return false; + } + box->length = cio_read(cio, 4); + if (box->length == 0) + box->length = cio_numbytesleft(cio) + 12; + } + else if (box->length == 0) { + box->length = cio_numbytesleft(cio) + 8; + } + + return true; +} + +#if 0 +static void jp2_write_url(opj_cio_t *cio, char *Idx_file) { + unsigned int i; + opj_jp2_box_t box; + + box.init_pos = cio_tell(cio); + cio_skip(cio, 4); + cio_write(cio, JP2_URL, 4); /* DBTL */ + cio_write(cio, 0, 1); /* VERS */ + cio_write(cio, 0, 3); /* FLAG */ + + if(Idx_file) { + for (i = 0; i < strlen(Idx_file); i++) { + cio_write(cio, Idx_file[i], 1); + } + } + + box.length = cio_tell(cio) - box.init_pos; + cio_seek(cio, box.init_pos); + cio_write(cio, box.length, 4); /* L */ + cio_seek(cio, box.init_pos + box.length); +} +#endif + +static bool jp2_read_ihdr(opj_jp2_t *jp2, opj_cio_t *cio) { + opj_jp2_box_t box; + + opj_common_ptr cinfo = jp2->cinfo; + + jp2_read_boxhdr(cinfo, cio, &box); + if (JP2_IHDR != box.type) { + opj_event_msg(cinfo, EVT_ERROR, "Expected IHDR Marker\n"); + return false; + } + + jp2->h = cio_read(cio, 4); /* HEIGHT */ + jp2->w = cio_read(cio, 4); /* WIDTH */ + jp2->numcomps = cio_read(cio, 2); /* NC */ + jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t)); + + jp2->bpc = cio_read(cio, 1); /* BPC */ + + jp2->C = cio_read(cio, 1); /* C */ + jp2->UnkC = cio_read(cio, 1); /* UnkC */ + jp2->IPR = cio_read(cio, 1); /* IPR */ + + if (cio_tell(cio) - box.init_pos != box.length) { + opj_event_msg(cinfo, EVT_ERROR, "Error with IHDR Box\n"); + return false; + } + + return true; +} + +static void jp2_write_ihdr(opj_jp2_t *jp2, opj_cio_t *cio) { + opj_jp2_box_t box; + + box.init_pos = cio_tell(cio); + cio_skip(cio, 4); + cio_write(cio, JP2_IHDR, 4); /* IHDR */ + + cio_write(cio, jp2->h, 4); /* HEIGHT */ + cio_write(cio, jp2->w, 4); /* WIDTH */ + cio_write(cio, jp2->numcomps, 2); /* NC */ + + cio_write(cio, jp2->bpc, 1); /* BPC */ + + cio_write(cio, jp2->C, 1); /* C : Always 7 */ + cio_write(cio, jp2->UnkC, 1); /* UnkC, colorspace unknown */ + cio_write(cio, jp2->IPR, 1); /* IPR, no intellectual property */ + + box.length = cio_tell(cio) - box.init_pos; + cio_seek(cio, box.init_pos); + cio_write(cio, box.length, 4); /* L */ + cio_seek(cio, box.init_pos + box.length); +} + +static void jp2_write_bpcc(opj_jp2_t *jp2, opj_cio_t *cio) { + unsigned int i; + opj_jp2_box_t box; + + box.init_pos = cio_tell(cio); + cio_skip(cio, 4); + cio_write(cio, JP2_BPCC, 4); /* BPCC */ + + for (i = 0; i < jp2->numcomps; i++) { + cio_write(cio, jp2->comps[i].bpcc, 1); + } + + box.length = cio_tell(cio) - box.init_pos; + cio_seek(cio, box.init_pos); + cio_write(cio, box.length, 4); /* L */ + cio_seek(cio, box.init_pos + box.length); +} + + +static bool jp2_read_bpcc(opj_jp2_t *jp2, opj_cio_t *cio) { + unsigned int i; + opj_jp2_box_t box; + + opj_common_ptr cinfo = jp2->cinfo; + + jp2_read_boxhdr(cinfo, cio, &box); + if (JP2_BPCC != box.type) { + opj_event_msg(cinfo, EVT_ERROR, "Expected BPCC Marker\n"); + return false; + } + + for (i = 0; i < jp2->numcomps; i++) { + jp2->comps[i].bpcc = cio_read(cio, 1); + } + + if (cio_tell(cio) - box.init_pos != box.length) { + opj_event_msg(cinfo, EVT_ERROR, "Error with BPCC Box\n"); + return false; + } + + return true; +} + +static void jp2_write_colr(opj_jp2_t *jp2, opj_cio_t *cio) { + opj_jp2_box_t box; + + box.init_pos = cio_tell(cio); + cio_skip(cio, 4); + cio_write(cio, JP2_COLR, 4); /* COLR */ + + cio_write(cio, jp2->meth, 1); /* METH */ + cio_write(cio, jp2->precedence, 1); /* PRECEDENCE */ + cio_write(cio, jp2->approx, 1); /* APPROX */ + + if (jp2->meth == 1) { + cio_write(cio, jp2->enumcs, 4); /* EnumCS */ + } else { + cio_write(cio, 0, 1); /* PROFILE (??) */ + } + + box.length = cio_tell(cio) - box.init_pos; + cio_seek(cio, box.init_pos); + cio_write(cio, box.length, 4); /* L */ + cio_seek(cio, box.init_pos + box.length); +} + +static bool jp2_read_colr(opj_jp2_t *jp2, opj_cio_t *cio) { + opj_jp2_box_t box; + int skip_len; + + opj_common_ptr cinfo = jp2->cinfo; + + jp2_read_boxhdr(cinfo, cio, &box); + do { + if (JP2_COLR != box.type) { + cio_skip(cio, box.length - 8); + jp2_read_boxhdr(cinfo, cio, &box); + } + } while(JP2_COLR != box.type); + + jp2->meth = cio_read(cio, 1); /* METH */ + jp2->precedence = cio_read(cio, 1); /* PRECEDENCE */ + jp2->approx = cio_read(cio, 1); /* APPROX */ + + if (jp2->meth == 1) { + jp2->enumcs = cio_read(cio, 4); /* EnumCS */ + } else { + /* skip PROFILE */ + skip_len = box.init_pos + box.length - cio_tell(cio); + if (skip_len < 0) { + opj_event_msg(cinfo, EVT_ERROR, "Error with JP2H box size\n"); + return false; + } + cio_skip(cio, box.init_pos + box.length - cio_tell(cio)); + } + + if (cio_tell(cio) - box.init_pos != box.length) { + opj_event_msg(cinfo, EVT_ERROR, "Error with BPCC Box\n"); + return false; + } + return true; +} + +void jp2_write_jp2h(opj_jp2_t *jp2, opj_cio_t *cio) { + opj_jp2_box_t box; + + box.init_pos = cio_tell(cio); + cio_skip(cio, 4); + cio_write(cio, JP2_JP2H, 4); /* JP2H */ + + jp2_write_ihdr(jp2, cio); + + if (jp2->bpc == 255) { + jp2_write_bpcc(jp2, cio); + } + jp2_write_colr(jp2, cio); + + box.length = cio_tell(cio) - box.init_pos; + cio_seek(cio, box.init_pos); + cio_write(cio, box.length, 4); /* L */ + cio_seek(cio, box.init_pos + box.length); +} + +bool jp2_read_jp2h(opj_jp2_t *jp2, opj_cio_t *cio) { + opj_jp2_box_t box; + int skip_len; + + opj_common_ptr cinfo = jp2->cinfo; + + jp2_read_boxhdr(cinfo, cio, &box); + do { + if (JP2_JP2H != box.type) { + if (box.type == JP2_JP2C) { + opj_event_msg(cinfo, EVT_ERROR, "Expected JP2H Marker\n"); + return false; + } + cio_skip(cio, box.length - 8); + jp2_read_boxhdr(cinfo, cio, &box); + } + } while(JP2_JP2H != box.type); + + if (!jp2_read_ihdr(jp2, cio)) + return false; + + if (jp2->bpc == 255) { + if (!jp2_read_bpcc(jp2, cio)) + return false; + } + if (!jp2_read_colr(jp2, cio)) + return false; + + skip_len = box.init_pos + box.length - cio_tell(cio); + if (skip_len < 0) { + opj_event_msg(cinfo, EVT_ERROR, "Error with JP2H Box\n"); + return false; + } + cio_skip(cio, box.init_pos + box.length - cio_tell(cio)); + + return true; +} + +static void jp2_write_ftyp(opj_jp2_t *jp2, opj_cio_t *cio) { + unsigned int i; + opj_jp2_box_t box; + + box.init_pos = cio_tell(cio); + cio_skip(cio, 4); + cio_write(cio, JP2_FTYP, 4); /* FTYP */ + + cio_write(cio, jp2->brand, 4); /* BR */ + cio_write(cio, jp2->minversion, 4); /* MinV */ + + for (i = 0; i < jp2->numcl; i++) { + cio_write(cio, jp2->cl[i], 4); /* CL */ + } + + box.length = cio_tell(cio) - box.init_pos; + cio_seek(cio, box.init_pos); + cio_write(cio, box.length, 4); /* L */ + cio_seek(cio, box.init_pos + box.length); +} + +static bool jp2_read_ftyp(opj_jp2_t *jp2, opj_cio_t *cio) { + int i; + opj_jp2_box_t box; + + opj_common_ptr cinfo = jp2->cinfo; + + jp2_read_boxhdr(cinfo, cio, &box); + + if (JP2_FTYP != box.type) { + opj_event_msg(cinfo, EVT_ERROR, "Expected FTYP Marker\n"); + return false; + } + + jp2->brand = cio_read(cio, 4); /* BR */ + jp2->minversion = cio_read(cio, 4); /* MinV */ + jp2->numcl = (box.length - 16) / 4; + jp2->cl = (unsigned int *) opj_malloc(jp2->numcl * sizeof(unsigned int)); + + for (i = 0; i < (int)jp2->numcl; i++) { + jp2->cl[i] = cio_read(cio, 4); /* CLi */ + } + + if (cio_tell(cio) - box.init_pos != box.length) { + opj_event_msg(cinfo, EVT_ERROR, "Error with FTYP Box\n"); + return false; + } + + return true; +} + +static int jp2_write_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info) { + unsigned int j2k_codestream_offset, j2k_codestream_length; + opj_jp2_box_t box; + + opj_j2k_t *j2k = jp2->j2k; + + box.init_pos = cio_tell(cio); + cio_skip(cio, 4); + cio_write(cio, JP2_JP2C, 4); /* JP2C */ + + /* J2K encoding */ + j2k_codestream_offset = cio_tell(cio); + if(!j2k_encode(j2k, cio, image, cstr_info)) { + opj_event_msg(j2k->cinfo, EVT_ERROR, "Failed to encode image\n"); + return 0; + } + j2k_codestream_length = cio_tell(cio) - j2k_codestream_offset; + + jp2->j2k_codestream_offset = j2k_codestream_offset; + jp2->j2k_codestream_length = j2k_codestream_length; + + box.length = 8 + jp2->j2k_codestream_length; + cio_seek(cio, box.init_pos); + cio_write(cio, box.length, 4); /* L */ + cio_seek(cio, box.init_pos + box.length); + + return box.length; +} + +static bool jp2_read_jp2c(opj_jp2_t *jp2, opj_cio_t *cio, unsigned int *j2k_codestream_length, unsigned int *j2k_codestream_offset) { + opj_jp2_box_t box; + + opj_common_ptr cinfo = jp2->cinfo; + + jp2_read_boxhdr(cinfo, cio, &box); + do { + if(JP2_JP2C != box.type) { + cio_skip(cio, box.length - 8); + jp2_read_boxhdr(cinfo, cio, &box); + } + } while(JP2_JP2C != box.type); + + *j2k_codestream_offset = cio_tell(cio); + *j2k_codestream_length = box.length - 8; + + return true; +} + +static void jp2_write_jp(opj_cio_t *cio) { + opj_jp2_box_t box; + + box.init_pos = cio_tell(cio); + cio_skip(cio, 4); + cio_write(cio, JP2_JP, 4); /* JP2 signature */ + cio_write(cio, 0x0d0a870a, 4); + + box.length = cio_tell(cio) - box.init_pos; + cio_seek(cio, box.init_pos); + cio_write(cio, box.length, 4); /* L */ + cio_seek(cio, box.init_pos + box.length); +} + +static bool jp2_read_jp(opj_jp2_t *jp2, opj_cio_t *cio) { + opj_jp2_box_t box; + + opj_common_ptr cinfo = jp2->cinfo; + + jp2_read_boxhdr(cinfo, cio, &box); + if (JP2_JP != box.type) { + opj_event_msg(cinfo, EVT_ERROR, "Expected JP Marker\n"); + return false; + } + if (0x0d0a870a != cio_read(cio, 4)) { + opj_event_msg(cinfo, EVT_ERROR, "Error with JP Marker\n"); + return false; + } + if (cio_tell(cio) - box.init_pos != box.length) { + opj_event_msg(cinfo, EVT_ERROR, "Error with JP Box size\n"); + return false; + } + + return true; +} + + +static bool jp2_read_struct(opj_jp2_t *jp2, opj_cio_t *cio) { + if (!jp2_read_jp(jp2, cio)) + return false; + if (!jp2_read_ftyp(jp2, cio)) + return false; + if (!jp2_read_jp2h(jp2, cio)) + return false; + if (!jp2_read_jp2c(jp2, cio, &jp2->j2k_codestream_length, &jp2->j2k_codestream_offset)) + return false; + + return true; +} + +/* ----------------------------------------------------------------------- */ +/* JP2 decoder interface */ +/* ----------------------------------------------------------------------- */ + +opj_jp2_t* jp2_create_decompress(opj_common_ptr cinfo) { + opj_jp2_t *jp2 = (opj_jp2_t*) opj_calloc(1, sizeof(opj_jp2_t)); + if(jp2) { + jp2->cinfo = cinfo; + /* create the J2K codec */ + jp2->j2k = j2k_create_decompress(cinfo); + if(jp2->j2k == NULL) { + jp2_destroy_decompress(jp2); + return NULL; + } + } + return jp2; +} + +void jp2_destroy_decompress(opj_jp2_t *jp2) { + if(jp2) { + /* destroy the J2K codec */ + j2k_destroy_decompress(jp2->j2k); + + if(jp2->comps) { + opj_free(jp2->comps); + } + if(jp2->cl) { + opj_free(jp2->cl); + } + opj_free(jp2); + } +} + +void jp2_setup_decoder(opj_jp2_t *jp2, opj_dparameters_t *parameters) { + /* setup the J2K codec */ + j2k_setup_decoder(jp2->j2k, parameters); + /* further JP2 initializations go here */ +} + +opj_image_t* jp2_decode(opj_jp2_t *jp2, opj_cio_t *cio, opj_codestream_info_t *cstr_info) { + opj_common_ptr cinfo; + opj_image_t *image = NULL; + + if(!jp2 || !cio) { + return NULL; + } + + cinfo = jp2->cinfo; + + /* JP2 decoding */ + if(!jp2_read_struct(jp2, cio)) { + opj_event_msg(cinfo, EVT_ERROR, "Failed to decode jp2 structure\n"); + return NULL; + } + + /* J2K decoding */ + image = j2k_decode(jp2->j2k, cio, cstr_info); + if(!image) { + opj_event_msg(cinfo, EVT_ERROR, "Failed to decode J2K image\n"); + } + + /* Set Image Color Space */ + if (jp2->enumcs == 16) + image->color_space = CLRSPC_SRGB; + else if (jp2->enumcs == 17) + image->color_space = CLRSPC_GRAY; + else if (jp2->enumcs == 18) + image->color_space = CLRSPC_SYCC; + else + image->color_space = CLRSPC_UNKNOWN; + + return image; +} + +/* ----------------------------------------------------------------------- */ +/* JP2 encoder interface */ +/* ----------------------------------------------------------------------- */ + +opj_jp2_t* jp2_create_compress(opj_common_ptr cinfo) { + opj_jp2_t *jp2 = (opj_jp2_t*)opj_malloc(sizeof(opj_jp2_t)); + if(jp2) { + jp2->cinfo = cinfo; + /* create the J2K codec */ + jp2->j2k = j2k_create_compress(cinfo); + if(jp2->j2k == NULL) { + jp2_destroy_compress(jp2); + return NULL; + } + } + return jp2; +} + +void jp2_destroy_compress(opj_jp2_t *jp2) { + if(jp2) { + /* destroy the J2K codec */ + j2k_destroy_compress(jp2->j2k); + + if(jp2->comps) { + opj_free(jp2->comps); + } + if(jp2->cl) { + opj_free(jp2->cl); + } + opj_free(jp2); + } +} + +void jp2_setup_encoder(opj_jp2_t *jp2, opj_cparameters_t *parameters, opj_image_t *image) { + int i; + int depth_0, sign; + + if(!jp2 || !parameters || !image) + return; + + /* setup the J2K codec */ + /* ------------------- */ + + /* Check if number of components respects standard */ + if (image->numcomps < 1 || image->numcomps > 16384) { + opj_event_msg(jp2->cinfo, EVT_ERROR, "Invalid number of components specified while setting up JP2 encoder\n"); + return; + } + + j2k_setup_encoder(jp2->j2k, parameters, image); + + /* setup the JP2 codec */ + /* ------------------- */ + + /* Profile box */ + + jp2->brand = JP2_JP2; /* BR */ + jp2->minversion = 0; /* MinV */ + jp2->numcl = 1; + jp2->cl = (unsigned int*) opj_malloc(jp2->numcl * sizeof(unsigned int)); + jp2->cl[0] = JP2_JP2; /* CL0 : JP2 */ + + /* Image Header box */ + + jp2->numcomps = image->numcomps; /* NC */ + jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t)); + jp2->h = image->y1 - image->y0; /* HEIGHT */ + jp2->w = image->x1 - image->x0; /* WIDTH */ + /* BPC */ + depth_0 = image->comps[0].prec - 1; + sign = image->comps[0].sgnd; + jp2->bpc = depth_0 + (sign << 7); + for (i = 1; i < image->numcomps; i++) { + int depth = image->comps[i].prec - 1; + sign = image->comps[i].sgnd; + if (depth_0 != depth) + jp2->bpc = 255; + } + jp2->C = 7; /* C : Always 7 */ + jp2->UnkC = 0; /* UnkC, colorspace specified in colr box */ + jp2->IPR = 0; /* IPR, no intellectual property */ + + /* BitsPerComponent box */ + + for (i = 0; i < image->numcomps; i++) { + jp2->comps[i].bpcc = image->comps[i].prec - 1 + (image->comps[i].sgnd << 7); + } + + /* Colour Specification box */ + + if ((image->numcomps == 1 || image->numcomps == 3) && (jp2->bpc != 255)) { + jp2->meth = 1; /* METH: Enumerated colourspace */ + } else { + jp2->meth = 2; /* METH: Restricted ICC profile */ + } + if (jp2->meth == 1) { + if (image->color_space == 1) + jp2->enumcs = 16; /* sRGB as defined by IEC 61966𣇻 */ + else if (image->color_space == 2) + jp2->enumcs = 17; /* greyscale */ + else if (image->color_space == 3) + jp2->enumcs = 18; /* YUV */ + } else { + jp2->enumcs = 0; /* PROFILE (??) */ + } + jp2->precedence = 0; /* PRECEDENCE */ + jp2->approx = 0; /* APPROX */ + +} + +bool jp2_encode(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, opj_codestream_info_t *cstr_info) { + + /* JP2 encoding */ + + /* JPEG 2000 Signature box */ + jp2_write_jp(cio); + /* File Type box */ + jp2_write_ftyp(jp2, cio); + /* JP2 Header box */ + jp2_write_jp2h(jp2, cio); + + /* J2K encoding */ + + if(!jp2_write_jp2c(jp2, cio, image, cstr_info)) { + opj_event_msg(jp2->cinfo, EVT_ERROR, "Failed to encode image\n"); + return false; + } + + return true; +} + + |