X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Futil.cc;h=18fa1b173d556b2c856b528a4e8afd576353629a;hb=d5ec30b6d746177e97707085b9e6b709e41ecc20;hp=0af9c871369a459049f4f6f8e2a73432a360843d;hpb=4709b2fe88040f3678560997726f3a209eacc660;p=libdcp.git diff --git a/src/util.cc b/src/util.cc index 0af9c871..18fa1b17 100644 --- a/src/util.cc +++ b/src/util.cc @@ -17,19 +17,41 @@ */ +/** @file src/util.cc + * @brief Utility methods. + */ + #include #include #include #include #include +#include #include +#include +#include +#include +#include +#include #include "KM_util.h" #include "KM_fileio.h" #include "AS_DCP.h" #include "util.h" +#include "exceptions.h" +#include "types.h" +#include "argb_frame.h" +#include "certificates.h" +#include "gamma_lut.h" -using namespace std; -using namespace boost; +using std::string; +using std::cout; +using std::stringstream; +using std::min; +using std::max; +using std::list; +using boost::shared_ptr; +using boost::lexical_cast; +using namespace libdcp; /** Create a UUID. * @return UUID. @@ -44,18 +66,17 @@ libdcp::make_uuid () return string (buffer); } + /** Create a digest for a file. * @param filename File name. * @return Digest. */ string -libdcp::make_digest (string filename, sigc::signal1* progress) +libdcp::make_digest (string filename) { - int const file_size = filesystem::file_size (filename); - Kumu::FileReader reader; if (ASDCP_FAILURE (reader.OpenRead (filename.c_str ()))) { - throw runtime_error ("could not open file to compute digest"); + boost::throw_exception (FileError ("could not open file to compute digest", filename)); } SHA_CTX sha; @@ -70,21 +91,344 @@ libdcp::make_digest (string filename, sigc::signal1* progress) if (r == Kumu::RESULT_ENDOFFILE) { break; } else if (ASDCP_FAILURE (r)) { - throw runtime_error ("could not read file to compute digest"); + boost::throw_exception (FileError ("could not read file to compute digest", filename)); } SHA1_Update (&sha, read_buffer.Data(), read); done += read; - - if (progress) { - (*progress) (0.5 + (0.5 * done / file_size)); - } } byte_t byte_buffer[20]; SHA1_Final (byte_buffer, &sha); - stringstream s; char digest[64]; return Kumu::base64encode (byte_buffer, 20, digest, 64); } + +/** Convert a content kind to a string which can be used in a + * node. + * @param kind ContentKind. + * @return string. + */ +string +libdcp::content_kind_to_string (ContentKind kind) +{ + switch (kind) { + case FEATURE: + return "feature"; + case SHORT: + return "short"; + case TRAILER: + return "trailer"; + case TEST: + return "test"; + case TRANSITIONAL: + return "transitional"; + case RATING: + return "rating"; + case TEASER: + return "teaser"; + case POLICY: + return "policy"; + case PUBLIC_SERVICE_ANNOUNCEMENT: + return "psa"; + case ADVERTISEMENT: + return "advertisement"; + } + + assert (false); +} + +/** Convert a string from a node to a libdcp ContentKind. + * Reasonably tolerant about varying case. + * @param type Content kind string. + * @return libdcp ContentKind. + */ +libdcp::ContentKind +libdcp::content_kind_from_string (string type) +{ + /* XXX: should probably just convert type to lower-case and have done with it */ + + if (type == "feature") { + return FEATURE; + } else if (type == "short") { + return SHORT; + } else if (type == "trailer" || type == "Trailer") { + return TRAILER; + } else if (type == "test") { + return TEST; + } else if (type == "transitional") { + return TRANSITIONAL; + } else if (type == "rating") { + return RATING; + } else if (type == "teaser" || type == "Teaser") { + return TEASER; + } else if (type == "policy") { + return POLICY; + } else if (type == "psa") { + return PUBLIC_SERVICE_ANNOUNCEMENT; + } else if (type == "advertisement") { + return ADVERTISEMENT; + } + + assert (false); +} + +/** 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 openjpeg image, which the caller must call opj_image_destroy() on. + */ +opj_image_t * +libdcp::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 ("could not decode JPEG2000 codestream of " + lexical_cast (size) + " bytes.")); + } + + opj_cio_close (cio); + + image->x1 = rint (float(image->x1) / pow (2, reduce)); + image->y1 = rint (float(image->y1) / pow (2, reduce)); + return image; +} + +/** Convert an openjpeg XYZ image to RGB. + * @param xyz_frame Frame in XYZ. + * @return RGB image. + */ +shared_ptr +libdcp::xyz_to_rgb (opj_image_t* xyz_frame, shared_ptr lut_in, shared_ptr lut_out) +{ + float const dci_coefficient = 48.0 / 52.37; + + /* sRGB color matrix for XYZ -> RGB. This is the same as the one used by the Fraunhofer + EasyDCP player, I think. + */ + + float const colour_matrix[3][3] = { + { 3.24096989631653, -1.5373831987381, -0.498610764741898 }, + { -0.96924364566803, 1.87596750259399, 0.0415550582110882 }, + { 0.0556300804018974, -0.203976958990097, 1.05697154998779 } + }; + + int const max_colour = pow (2, lut_out->bit_depth()) - 1; + + struct { + double x, y, z; + } s; + + struct { + double r, g, b; + } d; + + int* xyz_x = xyz_frame->comps[0].data; + int* xyz_y = xyz_frame->comps[1].data; + int* xyz_z = xyz_frame->comps[2].data; + + shared_ptr argb_frame (new ARGBFrame (Size (xyz_frame->x1, xyz_frame->y1))); + + uint8_t* argb = argb_frame->data (); + + for (int y = 0; y < xyz_frame->y1; ++y) { + uint8_t* argb_line = argb; + for (int x = 0; x < xyz_frame->x1; ++x) { + + assert (*xyz_x >= 0 && *xyz_y >= 0 && *xyz_z >= 0 && *xyz_x < 4096 && *xyz_x < 4096 && *xyz_z < 4096); + + /* In gamma LUT */ + s.x = lut_in->lut()[*xyz_x++]; + s.y = lut_in->lut()[*xyz_y++]; + s.z = lut_in->lut()[*xyz_z++]; + + /* DCI companding */ + s.x /= dci_coefficient; + s.y /= dci_coefficient; + s.z /= dci_coefficient; + + /* XYZ to RGB */ + d.r = ((s.x * colour_matrix[0][0]) + (s.y * colour_matrix[0][1]) + (s.z * colour_matrix[0][2])); + d.g = ((s.x * colour_matrix[1][0]) + (s.y * colour_matrix[1][1]) + (s.z * colour_matrix[1][2])); + d.b = ((s.x * colour_matrix[2][0]) + (s.y * colour_matrix[2][1]) + (s.z * colour_matrix[2][2])); + + d.r = min (d.r, 1.0); + d.r = max (d.r, 0.0); + + d.g = min (d.g, 1.0); + d.g = max (d.g, 0.0); + + d.b = min (d.b, 1.0); + d.b = max (d.b, 0.0); + + /* Out gamma LUT */ + *argb_line++ = lut_out->lut()[(int) (d.b * max_colour)] * 0xff; + *argb_line++ = lut_out->lut()[(int) (d.g * max_colour)] * 0xff; + *argb_line++ = lut_out->lut()[(int) (d.r * max_colour)] * 0xff; + *argb_line++ = 0xff; + } + + argb += argb_frame->stride (); + } + + return argb_frame; +} + +/** @param s A string. + * @return true if the string contains only space, newline or tab characters, or is empty. + */ +bool +libdcp::empty_or_white_space (string s) +{ + for (size_t i = 0; i < s.length(); ++i) { + if (s[i] != ' ' && s[i] != '\n' && s[i] != '\t') { + return false; + } + } + + return true; +} + +void +libdcp::init () +{ + if (xmlSecInit() < 0) { + throw MiscError ("could not initialise xmlsec"); + } +} + +void +libdcp::add_signature_value (xmlpp::Element* parent, CertificateChain const & certificates, string const & signer_key, string const & ns) +{ + parent->add_child("SignatureValue", ns); + + xmlpp::Element* key_info = parent->add_child("KeyInfo", ns); + list > c = certificates.leaf_to_root (); + for (list >::iterator i = c.begin(); i != c.end(); ++i) { + xmlpp::Element* data = key_info->add_child("X509Data", ns); + + { + xmlpp::Element* serial = data->add_child("X509IssuerSerial", ns); + serial->add_child("X509IssuerName", ns)->add_child_text((*i)->issuer ()); + serial->add_child("X509SerialNumber", ns)->add_child_text((*i)->serial ()); + } + + data->add_child("X509Certificate", ns)->add_child_text((*i)->certificate()); + } + + xmlSecKeysMngrPtr keys_manager = xmlSecKeysMngrCreate(); + if (!keys_manager) { + throw MiscError ("could not create keys manager"); + } + + xmlSecDSigCtx signature_context; + + if (xmlSecDSigCtxInitialize (&signature_context, keys_manager) < 0) { + throw MiscError ("could not initialise XMLSEC context"); + } + + if (xmlSecDSigCtxSign (&signature_context, parent->cobj()) < 0) { + throw MiscError ("could not sign"); + } + + xmlSecDSigCtxFinalize (&signature_context); + xmlSecKeysMngrDestroy (keys_manager); +} + + +void +libdcp::add_signer (xmlpp::Element* parent, CertificateChain const & certificates, string const & ns) +{ + xmlpp::Element* signer = parent->add_child("Signer"); + + { + xmlpp::Element* data = signer->add_child("X509Data", ns); + + { + xmlpp::Element* serial_element = data->add_child("X509IssuerSerial", ns); + serial_element->add_child("X509IssuerName", ns)->add_child_text (certificates.leaf()->issuer()); + serial_element->add_child("X509SerialNumber", ns)->add_child_text (certificates.leaf()->serial()); + } + + data->add_child("X509SubjectName", ns)->add_child_text (certificates.leaf()->subject()); + } +} + +void +libdcp::sign (xmlpp::Element* parent, CertificateChain const & certificates, string const & signer_key) +{ + add_signer (parent, certificates, "dsig"); + + xmlpp::Element* signature = parent->add_child("Signature", "dsig"); + + { + xmlpp::Element* signed_info = signature->add_child ("SignedInfo", "dsig"); + signed_info->add_child("CanonicalizationMethod", "dsig")->set_attribute ("Algorithm", "http://www.w3.org/TR/2001/REC-xml-c14n-20010315"); + signed_info->add_child("SignatureMethod", "dsig")->set_attribute("Algorithm", "http://www.w3.org/2001/04/xmldsig-more#rsa-sha256"); + { + xmlpp::Element* reference = signed_info->add_child("Reference", "dsig"); + reference->set_attribute ("URI", ""); + { + xmlpp::Element* transforms = reference->add_child("Transforms", "dsig"); + transforms->add_child("Transform", "dsig")->set_attribute ( + "Algorithm", "http://www.w3.org/2000/09/xmldsig#enveloped-signature" + ); + } + reference->add_child("DigestMethod", "dsig")->set_attribute("Algorithm", "http://www.w3.org/2000/09/xmldsig#sha1"); + /* This will be filled in by the signing later */ + reference->add_child("DigestValue", "dsig"); + } + } + + add_signature_value (signature, certificates, signer_key, "dsig"); +} + +bool libdcp::operator== (libdcp::Size const & a, libdcp::Size const & b) +{ + return (a.width == b.width && a.height == b.height); +} + +bool libdcp::operator!= (libdcp::Size const & a, libdcp::Size const & b) +{ + return !(a == b); +} + +/** The base64 decode routine in KM_util.cpp gives different values to both + * this and the command-line base64 for some inputs. Not sure why. + */ +int +libdcp::base64_decode (string const & in, unsigned char* out, int out_length) +{ + BIO* b64 = BIO_new (BIO_f_base64 ()); + + /* This means the input should have no newlines */ + BIO_set_flags (b64, BIO_FLAGS_BASE64_NO_NL); + + /* Copy our input string, removing newlines */ + char in_buffer[in.size() + 1]; + char* p = in_buffer; + for (size_t i = 0; i < in.size(); ++i) { + if (in[i] != '\n' && in[i] != '\r') { + *p++ = in[i]; + } + } + + BIO* bmem = BIO_new_mem_buf (in_buffer, p - in_buffer); + bmem = BIO_push (b64, bmem); + int const N = BIO_read (bmem, out, out_length); + BIO_free_all (bmem); + + return N; +}