X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Fj2k.cc;h=4c29abfc5e49662d9d116e5efd07739eb43c419a;hb=refs%2Fheads%2F1.0-templates;hp=5fd787f635b67c0d97af7f3f0087c8d9b3ba50f5;hpb=273fd9a4f1b43ae0de0071e5efd3b6347b166ff1;p=libdcp.git diff --git a/src/j2k.cc b/src/j2k.cc index 5fd787f6..4c29abfc 100644 --- a/src/j2k.cc +++ b/src/j2k.cc @@ -1,20 +1,34 @@ /* Copyright (C) 2012-2015 Carl Hetherington - This program is free software; you can redistribute it and/or modify + This file is part of libdcp. + + libdcp is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. - This program is distributed in the hope that it will be useful, + libdcp is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - + along with libdcp. If not, see . + + In addition, as a special exception, the copyright holders give + permission to link the code of portions of this program with the + OpenSSL library under certain conditions as described in each + individual source file, and distribute linked combinations + including the two. + + You must obey the GNU General Public License in all respects + for all of the code used other than OpenSSL. If you modify + file(s) with this exception, you may extend this exception to your + version of the file(s), but you are not obligated to do so. If you + do not wish to do so, delete this exception statement from your + version. If you delete this exception statement from all source + files in the program, then also delete it here. */ #include "j2k.h" @@ -39,6 +53,8 @@ dcp::decompress_j2k (Data data, int reduce) return dcp::decompress_j2k (data.data().get(), data.size(), reduce); } +#ifdef LIBDCP_OPENJPEG2 + class ReadBuffer { public: @@ -136,11 +152,48 @@ dcp::decompress_j2k (uint8_t* data, int64_t size, int reduce) opj_destroy_codec (decoder); opj_stream_destroy (stream); - image->x1 = rint (float(image->x1) / pow (2.0, reduce)); - image->y1 = rint (float(image->y1) / pow (2.0, reduce)); + image->x1 = rint (float(image->x1) / pow (2.0f, reduce)); + image->y1 = rint (float(image->y1) / pow (2.0f, reduce)); return shared_ptr (new OpenJPEGImage (image)); } +#endif +#ifdef LIBDCP_OPENJPEG1 +/** Decompress a JPEG2000 image to a bitmap. + * @param data JPEG2000 data. + * @param size Size of data in bytes. + * @param reduce A power of 2 by which to reduce the size of the decoded image; + * e.g. 0 reduces by (2^0 == 1), ie keeping the same size. + * 1 reduces by (2^1 == 2), ie halving the size of the image. + * This is useful for scaling 4K DCP images down to 2K. + * @return XYZ image. + */ +shared_ptr +dcp::decompress_j2k (uint8_t* data, int64_t size, int reduce) +{ + opj_dinfo_t* decoder = opj_create_decompress (CODEC_J2K); + opj_dparameters_t parameters; + opj_set_default_decoder_parameters (¶meters); + parameters.cp_reduce = reduce; + opj_setup_decoder (decoder, ¶meters); + opj_cio_t* cio = opj_cio_open ((opj_common_ptr) decoder, data, size); + opj_image_t* image = opj_decode (decoder, cio); + if (!image) { + opj_destroy_decompress (decoder); + opj_cio_close (cio); + boost::throw_exception (DCPReadError (String::compose ("could not decode JPEG2000 codestream of %1 bytes.", size))); + } + + opj_destroy_decompress (decoder); + opj_cio_close (cio); + + image->x1 = rint (float(image->x1) / pow (2, reduce)); + image->y1 = rint (float(image->y1) / pow (2, reduce)); + return shared_ptr (new OpenJPEGImage (image)); +} +#endif + +#ifdef LIBDCP_OPENJPEG2 class WriteBuffer { public: @@ -229,6 +282,7 @@ dcp::compress_j2k (shared_ptr xyz, int bandwidth, int frame } parameters.max_comp_size = parameters.max_cs_size / 1.25; parameters.tcp_numlayers = 1; + parameters.tcp_mct = 1; /* Setup the encoder parameters using the current image and user parameters */ opj_setup_encoder (encoder, ¶meters, xyz->opj_image()); @@ -267,3 +321,120 @@ dcp::compress_j2k (shared_ptr xyz, int bandwidth, int frame return enc; } +#endif + +#ifdef LIBDCP_OPENJPEG1 +Data +dcp::compress_j2k (shared_ptr xyz, int bandwidth, int frames_per_second, bool threed, bool fourk) +{ + /* Set the max image and component sizes based on frame_rate */ + int max_cs_len = ((float) bandwidth) / 8 / frames_per_second; + if (threed) { + /* In 3D we have only half the normal bandwidth per eye */ + max_cs_len /= 2; + } + int const max_comp_size = max_cs_len / 1.25; + + /* get a J2K compressor handle */ + opj_cinfo_t* cinfo = opj_create_compress (CODEC_J2K); + if (cinfo == 0) { + throw MiscError ("could not create JPEG2000 encoder"); + } + + /* Set encoding parameters to default values */ + opj_cparameters_t parameters; + opj_set_default_encoder_parameters (¶meters); + + /* Set default cinema parameters */ + parameters.tile_size_on = false; + parameters.cp_tdx = 1; + parameters.cp_tdy = 1; + + /* Tile part */ + parameters.tp_flag = 'C'; + parameters.tp_on = 1; + + /* Tile and Image shall be at (0,0) */ + parameters.cp_tx0 = 0; + parameters.cp_ty0 = 0; + parameters.image_offset_x0 = 0; + parameters.image_offset_y0 = 0; + + /* Codeblock size = 32x32 */ + parameters.cblockw_init = 32; + parameters.cblockh_init = 32; + parameters.csty |= 0x01; + + /* The progression order shall be CPRL */ + parameters.prog_order = CPRL; + + /* No ROI */ + parameters.roi_compno = -1; + + parameters.subsampling_dx = 1; + parameters.subsampling_dy = 1; + + /* 9-7 transform */ + parameters.irreversible = 1; + + parameters.tcp_rates[0] = 0; + parameters.tcp_numlayers++; + parameters.cp_disto_alloc = 1; + parameters.cp_rsiz = fourk ? CINEMA4K : CINEMA2K; + if (fourk) { + parameters.numpocs = 2; + parameters.POC[0].tile = 1; + parameters.POC[0].resno0 = 0; + parameters.POC[0].compno0 = 0; + parameters.POC[0].layno1 = 1; + parameters.POC[0].resno1 = parameters.numresolution - 1; + parameters.POC[0].compno1 = 3; + parameters.POC[0].prg1 = CPRL; + parameters.POC[1].tile = 1; + parameters.POC[1].resno0 = parameters.numresolution - 1; + parameters.POC[1].compno0 = 0; + parameters.POC[1].layno1 = 1; + parameters.POC[1].resno1 = parameters.numresolution; + parameters.POC[1].compno1 = 3; + parameters.POC[1].prg1 = CPRL; + } + + parameters.cp_comment = strdup ("libdcp"); + parameters.cp_cinema = fourk ? CINEMA4K_24 : CINEMA2K_24; + + /* 3 components, so use MCT */ + parameters.tcp_mct = 1; + + /* set max image */ + parameters.max_comp_size = max_comp_size; + parameters.tcp_rates[0] = ((float) (3 * xyz->size().width * xyz->size().height * 12)) / (max_cs_len * 8); + + /* Set event manager to null (openjpeg 1.3 bug) */ + cinfo->event_mgr = 0; + + /* Setup the encoder parameters using the current image and user parameters */ + opj_setup_encoder (cinfo, ¶meters, xyz->opj_image ()); + + opj_cio_t* cio = opj_cio_open ((opj_common_ptr) cinfo, 0, 0); + if (cio == 0) { + opj_destroy_compress (cinfo); + throw MiscError ("could not open JPEG2000 stream"); + } + + int const r = opj_encode (cinfo, cio, xyz->opj_image(), 0); + if (r == 0) { + opj_cio_close (cio); + opj_destroy_compress (cinfo); + throw MiscError ("JPEG2000 encoding failed"); + } + + Data enc (cio->buffer, cio_tell (cio)); + + opj_cio_close (cio); + free (parameters.cp_comment); + opj_destroy_compress (cinfo); + + return enc; +} + +#endif