+
+/** @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 soundtrack channels (L/R/C/Ls/Rs/Lc/Rc/Bsl/Bsr), second: number of LFE channels.
+ */
+pair<int, int>
+audio_channel_types (list<int> mapped, int channels)
+{
+ int non_lfe = 0;
+ int lfe = 0;
+
+ for (auto i: mapped) {
+ if (i >= channels) {
+ /* This channel is mapped but is not included in the DCP */
+ continue;
+ }
+
+ switch (static_cast<dcp::Channel>(i)) {
+ case dcp::Channel::LFE:
+ ++lfe;
+ break;
+ case dcp::Channel::LEFT:
+ case dcp::Channel::RIGHT:
+ case dcp::Channel::CENTRE:
+ case dcp::Channel::LS:
+ case dcp::Channel::RS:
+ case dcp::Channel::BSL:
+ case dcp::Channel::BSR:
+ ++non_lfe;
+ break;
+ case dcp::Channel::HI:
+ case dcp::Channel::VI:
+ case dcp::Channel::MOTION_DATA:
+ case dcp::Channel::SYNC_SIGNAL:
+ case dcp::Channel::SIGN_LANGUAGE:
+ case dcp::Channel::CHANNEL_COUNT:
+ break;
+ }
+ }
+
+ return make_pair (non_lfe, lfe);
+}
+
+shared_ptr<AudioBuffers>
+remap (shared_ptr<const AudioBuffers> input, int output_channels, AudioMapping map)
+{
+ auto mapped = make_shared<AudioBuffers>(output_channels, input->frames());
+ mapped->make_silent ();
+
+ int to_do = min (map.input_channels(), input->channels());
+
+ for (int i = 0; i < to_do; ++i) {
+ for (int j = 0; j < mapped->channels(); ++j) {
+ if (map.get(i, j) > 0) {
+ mapped->accumulate_channel(
+ input.get(),
+ i,
+ j,
+ map.get(i, 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 ();
+}
+
+/** @param size Size of picture that the subtitle will be overlaid onto */
+void
+emit_subtitle_image (ContentTimePeriod period, dcp::SubtitleImage sub, dcp::Size size, shared_ptr<TextDecoder> decoder)
+{
+ /* XXX: this is rather inefficient; decoding the image just to get its size */
+ FFmpegImageProxy proxy (sub.png_image(), VideoRange::FULL);
+ auto image = proxy.image().image;
+ /* set up rect with height and width */
+ dcpomatic::Rect<double> rect(0, 0, image->size().width / double(size.width), image->size().height / double(size.height));
+
+ /* add in position */
+
+ switch (sub.h_align()) {
+ case dcp::HAlign::LEFT:
+ rect.x += sub.h_position();
+ break;
+ case dcp::HAlign::CENTER:
+ rect.x += 0.5 + sub.h_position() - rect.width / 2;
+ break;
+ case dcp::HAlign::RIGHT:
+ rect.x += 1 - sub.h_position() - rect.width;
+ break;
+ }
+
+ switch (sub.v_align()) {
+ case dcp::VAlign::TOP:
+ rect.y += sub.v_position();
+ break;
+ case dcp::VAlign::CENTER:
+ rect.y += 0.5 + sub.v_position() - rect.height / 2;
+ break;
+ case dcp::VAlign::BOTTOM:
+ rect.y += 1 - sub.v_position() - rect.height;
+ break;
+ }
+
+ decoder->emit_bitmap (period, image, rect);
+}
+
+bool
+show_jobs_on_console (bool progress)
+{
+ bool first = true;
+ bool error = false;
+ while (true) {
+
+ dcpomatic_sleep_seconds (5);
+
+ auto jobs = JobManager::instance()->get();
+
+ if (!first && progress) {
+ for (size_t i = 0; i < jobs.size(); ++i) {
+ cout << "\033[1A\033[2K";
+ }
+ cout.flush ();
+ }
+
+ first = false;
+
+ for (auto i: jobs) {
+ if (progress) {
+ cout << i->name();
+ if (!i->sub_name().empty()) {
+ cout << "; " << i->sub_name();
+ }
+ cout << ": ";
+
+ if (i->progress ()) {
+ cout << i->status() << " \n";
+ } else {
+ cout << ": Running \n";
+ }
+ }
+
+ if (!progress && i->finished_in_error()) {
+ /* We won't see this error if we haven't been showing progress,
+ so show it now.
+ */
+ cout << i->status() << "\n";
+ }
+
+ if (i->finished_in_error()) {
+ error = true;
+ }
+ }
+
+ if (!JobManager::instance()->work_to_do()) {
+ break;
+ }
+ }
+
+ return error;
+}
+
+/** XXX: could use mmap? */
+void
+copy_in_bits (boost::filesystem::path from, boost::filesystem::path to, std::function<void (float)> progress)
+{
+ auto f = fopen_boost (from, "rb");
+ if (!f) {
+ throw OpenFileError (from, errno, OpenFileError::READ);
+ }
+ auto t = fopen_boost (to, "wb");
+ if (!t) {
+ fclose (f);
+ throw OpenFileError (to, errno, OpenFileError::WRITE);
+ }
+
+ /* on the order of a second's worth of copying */
+ boost::uintmax_t const chunk = 20 * 1024 * 1024;
+
+ auto buffer = static_cast<uint8_t*> (malloc(chunk));
+ if (!buffer) {
+ throw std::bad_alloc ();
+ }
+
+ boost::uintmax_t const total = boost::filesystem::file_size (from);
+ boost::uintmax_t remaining = total;
+
+ while (remaining) {
+ boost::uintmax_t this_time = min (chunk, remaining);
+ size_t N = fread (buffer, 1, chunk, f);
+ if (N < this_time) {
+ fclose (f);
+ fclose (t);
+ free (buffer);
+ throw ReadFileError (from, errno);
+ }
+
+ N = fwrite (buffer, 1, this_time, t);
+ if (N < this_time) {
+ fclose (f);
+ fclose (t);
+ free (buffer);
+ throw WriteFileError (to, errno);
+ }
+
+ progress (1 - float(remaining) / total);
+ remaining -= this_time;
+ }
+
+ fclose (f);
+ fclose (t);
+ free (buffer);
+}
+
+double
+db_to_linear (double db)
+{
+ return pow(10, db / 20);
+}
+
+double
+linear_to_db (double linear)
+{
+ return 20 * log10(linear);
+}
+
+
+dcp::Size
+scale_for_display (dcp::Size s, dcp::Size display_container, dcp::Size film_container)
+{
+ /* Now scale it down if the display container is smaller than the film container */
+ if (display_container != film_container) {
+ float const scale = min (
+ float (display_container.width) / film_container.width,
+ float (display_container.height) / film_container.height
+ );
+
+ s.width = lrintf (s.width * scale);
+ s.height = lrintf (s.height * scale);
+ }
+
+ return s;
+}
+
+
+dcp::DecryptedKDM
+decrypt_kdm_with_helpful_error (dcp::EncryptedKDM kdm)
+{
+ try {
+ return dcp::DecryptedKDM (kdm, Config::instance()->decryption_chain()->key().get());
+ } catch (dcp::KDMDecryptionError& e) {
+ /* Try to flesh out the error a bit */
+ auto const kdm_subject_name = kdm.recipient_x509_subject_name();
+ bool on_chain = false;
+ auto dc = Config::instance()->decryption_chain();
+ for (auto i: dc->root_to_leaf()) {
+ if (i.subject() == kdm_subject_name) {
+ on_chain = true;
+ }
+ }
+ if (!on_chain) {
+ throw KDMError (_("This KDM was not made for DCP-o-matic's decryption certificate."), e.what());
+ } else if (kdm_subject_name != dc->leaf().subject()) {
+ throw KDMError (_("This KDM was made for DCP-o-matic but not for its leaf certificate."), e.what());
+ } else {
+ throw;
+ }
+ }
+}
+
+
+boost::filesystem::path
+default_font_file ()
+{
+ boost::filesystem::path liberation_normal;
+ try {
+ liberation_normal = resources_path() / "LiberationSans-Regular.ttf";
+ if (!boost::filesystem::exists (liberation_normal)) {
+ /* Hack for unit tests */
+ liberation_normal = resources_path() / "fonts" / "LiberationSans-Regular.ttf";
+ }
+ } catch (boost::filesystem::filesystem_error& e) {
+
+ }
+
+ if (!boost::filesystem::exists(liberation_normal)) {
+ liberation_normal = "/usr/share/fonts/truetype/liberation/LiberationSans-Regular.ttf";
+ }
+
+ return liberation_normal;
+}
+
+
+string
+to_upper (string s)
+{
+ transform (s.begin(), s.end(), s.begin(), ::toupper);
+ return s;
+}
+
+
+/* Set to 1 to print the IDs of some of our threads to stdout on creation */
+#define DCPOMATIC_DEBUG_THREADS 0
+
+#if DCPOMATIC_DEBUG_THREADS
+void
+start_of_thread (string name)
+{
+ std::cout << "THREAD:" << name << ":" << std::hex << pthread_self() << "\n";
+}
+#else
+void
+start_of_thread (string)
+{
+
+}
+#endif
+