+
+/** @param mapped List of mapped audio channels from a Film.
+ * @param channels Total number of channels in the Film.
+ * @return First: number of non-LFE channels, second: number of LFE channels.
+ */
+pair<int, int>
+audio_channel_types (list<int> mapped, int channels)
+{
+ int non_lfe = 0;
+ int lfe = 0;
+
+ BOOST_FOREACH (int i, mapped) {
+ if (i >= channels) {
+ /* This channel is mapped but is not included in the DCP */
+ continue;
+ }
+
+ if (static_cast<dcp::Channel> (i) == dcp::LFE) {
+ ++lfe;
+ } else {
+ ++non_lfe;
+ }
+ }
+
+ return make_pair (non_lfe, lfe);
+}
+
+shared_ptr<AudioBuffers>
+remap (shared_ptr<const AudioBuffers> input, int output_channels, AudioMapping map)
+{
+ shared_ptr<AudioBuffers> mapped (new AudioBuffers (output_channels, input->frames()));
+ mapped->make_silent ();
+
+ for (int i = 0; i < map.input_channels(); ++i) {
+ for (int j = 0; j < mapped->channels(); ++j) {
+ if (map.get (i, static_cast<dcp::Channel> (j)) > 0) {
+ mapped->accumulate_channel (
+ input.get(),
+ i,
+ static_cast<dcp::Channel> (j),
+ map.get (i, static_cast<dcp::Channel> (j))
+ );
+ }
+ }
+ }
+
+ return mapped;
+}
+
+Eyes
+increment_eyes (Eyes e)
+{
+ if (e == EYES_LEFT) {
+ return EYES_RIGHT;
+ }
+
+ return EYES_LEFT;
+}
+
+void
+checked_fwrite (void const * ptr, size_t size, FILE* stream, boost::filesystem::path path)
+{
+ size_t N = fwrite (ptr, 1, size, stream);
+ if (N != size) {
+ if (ferror(stream)) {
+ fclose (stream);
+ throw FileError (String::compose("fwrite error %1", errno), path);
+ } else {
+ fclose (stream);
+ throw FileError ("Unexpected short write", path);
+ }
+ }
+}
+
+void
+checked_fread (void* ptr, size_t size, FILE* stream, boost::filesystem::path path)
+{
+ size_t N = fread (ptr, 1, size, stream);
+ if (N != size) {
+ if (ferror(stream)) {
+ fclose (stream);
+ throw FileError (String::compose("fread error %1", errno), path);
+ } else {
+ fclose (stream);
+ throw FileError ("Unexpected short read", path);
+ }
+ }
+}
+
+size_t
+utf8_strlen (string s)
+{
+ size_t const len = s.length ();
+ int N = 0;
+ for (size_t i = 0; i < len; ++i) {
+ unsigned char c = s[i];
+ if ((c & 0xe0) == 0xc0) {
+ ++i;
+ } else if ((c & 0xf0) == 0xe0) {
+ i += 2;
+ } else if ((c & 0xf8) == 0xf0) {
+ i += 3;
+ }
+ ++N;
+ }
+ return N;
+}
+
+string
+day_of_week_to_string (boost::gregorian::greg_weekday d)
+{
+ switch (d.as_enum()) {
+ case boost::date_time::Sunday:
+ return _("Sunday");
+ case boost::date_time::Monday:
+ return _("Monday");
+ case boost::date_time::Tuesday:
+ return _("Tuesday");
+ case boost::date_time::Wednesday:
+ return _("Wednesday");
+ case boost::date_time::Thursday:
+ return _("Thursday");
+ case boost::date_time::Friday:
+ return _("Friday");
+ case boost::date_time::Saturday:
+ return _("Saturday");
+ }
+
+ return d.as_long_string ();
+}
+
+#ifdef DCPOMATIC_VARIANT_SWAROOP
+
+/* Make up a key from the machine UUID */
+dcp::Data
+key_from_uuid ()
+{
+ dcp::Data key (dcpomatic::crypto_key_length());
+ memset (key.data().get(), 0, key.size());
+ string const magic = command_and_read ("dcpomatic2_uuid");
+ strncpy ((char *) key.data().get(), magic.c_str(), dcpomatic::crypto_key_length());
+ return key;
+}
+
+/* swaroop chain file format:
+ *
+ * 0 [int16_t] IV length
+ * 2 [int16_t] cert #1 length, or 0 for none
+ * 4 [int16_t] cert #2 length, or 0 for none
+ * 6 [int16_t] cert #3 length, or 0 for none
+ * 8 [int16_t] cert #4 length, or 0 for none
+ * 10 [int16_t] cert #5 length, or 0 for none
+ * 12 [int16_t] cert #6 length, or 0 for none
+ * 14 [int16_t] cert #7 length, or 0 for none
+ * 16 [int16_t] cert #8 length, or 0 for none
+ * 16 [int16_t] private key length
+ * 20 IV
+ * cert #1
+ * cert #2
+ * cert #3
+ * cert #4
+ * cert #5
+ * cert #6
+ * cert #7
+ * cert #8
+ * private key
+ */
+
+struct __attribute__ ((packed)) Header_ {
+ int16_t iv_length;
+ int16_t cert_length[8];
+ int16_t private_key_length;
+};
+
+typedef struct Header_ Header;
+
+shared_ptr<dcp::CertificateChain>
+read_swaroop_chain (boost::filesystem::path path)
+{
+ dcp::Data data (path);
+ Header* header = (Header *) data.data().get();
+ uint8_t* p = data.data().get() + sizeof(Header);
+
+ dcp::Data iv (p, header->iv_length);
+ p += iv.size();
+
+ shared_ptr<dcp::CertificateChain> cc (new dcp::CertificateChain());
+ for (int i = 0; i < 8; ++i) {
+ if (header->cert_length[i] == 0) {
+ break;
+ }
+ dcp::Data c(p, header->cert_length[i]);
+ p += c.size();
+ cc->add (dcp::Certificate(dcpomatic::decrypt(c, key_from_uuid(), iv)));
+ }
+
+ dcp::Data k (p, header->private_key_length);
+ cc->set_key (dcpomatic::decrypt(k, key_from_uuid(), iv));
+ return cc;
+}
+
+void
+write_swaroop_chain (shared_ptr<const dcp::CertificateChain> chain, boost::filesystem::path output)
+{
+ scoped_array<uint8_t> buffer (new uint8_t[65536]);
+ Header* header = (Header *) buffer.get();
+ memset (header, 0, sizeof(Header));
+ uint8_t* p = buffer.get() + sizeof(Header);
+
+ dcp::Data iv = dcpomatic::random_iv ();
+ header->iv_length = iv.size ();
+ memcpy (p, iv.data().get(), iv.size());
+ p += iv.size();
+
+ int N = 0;
+ BOOST_FOREACH (dcp::Certificate i, chain->root_to_leaf()) {
+ dcp::Data e = dcpomatic::encrypt (i.certificate(true), key_from_uuid(), iv);
+ memcpy (p, e.data().get(), e.size());
+ p += e.size();
+ DCPOMATIC_ASSERT (N < 8);
+ header->cert_length[N] = e.size ();
+ ++N;
+ }
+
+ dcp::Data k = dcpomatic::encrypt (chain->key().get(), key_from_uuid(), iv);
+ memcpy (p, k.data().get(), k.size());
+ p += k.size();
+ header->private_key_length = k.size ();
+
+ FILE* f = fopen_boost (output, "wb");
+ checked_fwrite (buffer.get(), p - buffer.get(), f, output);
+ fclose (f);
+}
+
+#endif