X-Git-Url: https://git.carlh.net/gitweb/?a=blobdiff_plain;f=src%2Futil.cc;h=4ac3685c4cd9ab9c5087ce20ac5c45d6cc85d89c;hb=0b3a3e461284b91e774f44c48f6f2f59b2a5832f;hp=9b650fa459fcb3f3c704e815867afb9a5968656d;hpb=34a25d89b16a33b5f619ae0eaaa03c17f93980af;p=libdcp.git diff --git a/src/util.cc b/src/util.cc index 9b650fa4..4ac3685c 100644 --- a/src/util.cc +++ b/src/util.cc @@ -1,5 +1,5 @@ /* - Copyright (C) 2012 Carl Hetherington + Copyright (C) 2012-2014 Carl Hetherington This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -26,16 +26,42 @@ #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" +#include "xyz_frame.h" -using namespace std; -using namespace boost; +using std::string; +using std::wstring; +using std::cout; +using std::stringstream; +using std::min; +using std::max; +using std::list; +using std::setw; +using std::setfill; +using boost::shared_ptr; +using boost::lexical_cast; +using namespace libdcp; +/** Create a UUID. + * @return UUID. + */ string libdcp::make_uuid () { @@ -46,21 +72,30 @@ libdcp::make_uuid () return string (buffer); } + +/** Create a digest for a file. + * @param filename File name. + * @param progress Pointer to a progress reporting function, or 0. The function will be called + * with a progress value between 0 and 1. + * @return Digest. + */ string -libdcp::make_digest (string filename, sigc::signal1* progress) +libdcp::make_digest (string filename, boost::function* progress) { - int const file_size = filesystem::file_size (filename); - Kumu::FileReader reader; - if (ASDCP_FAILURE (reader.OpenRead (filename.c_str ()))) { - throw FileError ("could not open file to compute digest", filename); + Kumu::Result_t r = reader.OpenRead (filename.c_str ()); + if (ASDCP_FAILURE (r)) { + boost::throw_exception (FileError ("could not open file to compute digest", filename, r)); } SHA_CTX sha; SHA1_Init (&sha); - - Kumu::ByteString read_buffer (65536); - int done = 0; + + int const buffer_size = 65536; + Kumu::ByteString read_buffer (buffer_size); + + Kumu::fsize_t done = 0; + Kumu::fsize_t const size = reader.Size (); while (1) { ui32_t read = 0; Kumu::Result_t r = reader.Read (read_buffer.Data(), read_buffer.Capacity(), &read); @@ -68,29 +103,33 @@ libdcp::make_digest (string filename, sigc::signal1* progress) if (r == Kumu::RESULT_ENDOFFILE) { break; } else if (ASDCP_FAILURE (r)) { - throw FileError ("could not read file to compute digest", filename); + boost::throw_exception (FileError ("could not read file to compute digest", filename, r)); } SHA1_Update (&sha, read_buffer.Data(), read); - done += read; if (progress) { - (*progress) (0.5 + (0.5 * done / file_size)); + (*progress) (float (done) / size); + done += read; } } - byte_t byte_buffer[20]; + byte_t byte_buffer[SHA_DIGEST_LENGTH]; SHA1_Final (byte_buffer, &sha); - stringstream s; char digest[64]; - return Kumu::base64encode (byte_buffer, 20, digest, 64); + return Kumu::base64encode (byte_buffer, SHA_DIGEST_LENGTH, digest, 64); } +/** Convert a content kind to a string which can be used in a + * node. + * @param kind ContentKind. + * @return string. + */ string -libdcp::content_type_to_string (ContentType type) +libdcp::content_kind_to_string (ContentKind kind) { - switch (type) { + switch (kind) { case FEATURE: return "feature"; case SHORT: @@ -115,13 +154,209 @@ libdcp::content_type_to_string (ContentType type) 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) +{ + transform (type.begin(), type.end(), type.begin(), ::tolower); + + if (type == "feature") { + return FEATURE; + } else if (type == "short") { + return SHORT; + } else if (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") { + 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 XYZ image. + */ +shared_ptr +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_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 XYZFrame (image)); +} + +/** @param s A string. + * @return true if the string contains only space, newline or tab characters, or is empty. + */ bool -libdcp::ends_with (string big, string little) +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 (little.size() > big.size()) { - return false; + if (xmlSecInit() < 0) { + throw MiscError ("could not initialise xmlsec"); + } + +#ifdef XMLSEC_CRYPTO_DYNAMIC_LOADING + if (xmlSecCryptoDLLoadLibrary(BAD_CAST XMLSEC_CRYPTO) < 0) { + throw MiscError ("unable to load default xmlsec-crypto library"); + } +#endif + + if (xmlSecCryptoAppInit(0) < 0) { + throw MiscError ("could not initialise crypto"); } - return big.compare (big.length() - little.length(), little.length(), little) == 0; + if (xmlSecCryptoInit() < 0) { + throw MiscError ("could not initialise xmlsec-crypto"); + } +} + +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; +} + +/** @param tm Local time. + * @return String of the form 2014-04-02T18:05:23+04:00, where the UTC offset is derived + * from the current system time zone. + */ +string +libdcp::tm_to_string (struct tm* tm) +{ + char buffer[64]; + strftime (buffer, 64, "%Y-%m-%dT%H:%M:%S", tm); + + /* Compute current UTC offset */ + boost::posix_time::ptime const utc_now = boost::posix_time::second_clock::universal_time (); + boost::posix_time::ptime const now = boost::date_time::c_local_adjustor::utc_to_local (utc_now); + + return string (buffer) + utc_offset_to_string (now - utc_now); +} + +/** @param b Offset from UTC to local time. + * @return string of the form e.g. -01:00. + */ +string +libdcp::utc_offset_to_string (boost::posix_time::time_duration b) +{ + bool const negative = b.is_negative (); + if (negative) { + b = boost::posix_time::time_duration (-b.hours(), b.minutes(), 0, 0); + } + + stringstream o; + if (negative) { + o << "-"; + } else { + o << "+"; + } + + o << setw(2) << setfill('0') << b.hours() << ":" << setw(2) << setfill('0') << b.minutes(); + return o.str (); +} + +string +libdcp::ptime_to_string (boost::posix_time::ptime t) +{ + struct tm t_tm = boost::posix_time::to_tm (t); + return tm_to_string (&t_tm); +} + + +/* Apparently there is no way to create an ofstream using a UTF-8 + filename under Windows. We are hence reduced to using fopen + with this wrapper. +*/ +FILE * +libdcp::fopen_boost (boost::filesystem::path p, string t) +{ +#ifdef LIBDCP_WINDOWS + wstring w (t.begin(), t.end()); + /* c_str() here should give a UTF-16 string */ + return _wfopen (p.c_str(), w.c_str ()); +#else + return fopen (p.c_str(), t.c_str ()); +#endif }