+ int png_color_type = PNG_COLOR_TYPE_RGB;
+ int bits_per_pixel = 0;
+ switch (image->pixel_format()) {
+ case AV_PIX_FMT_RGB24:
+ bits_per_pixel = 8;
+ break;
+ case AV_PIX_FMT_XYZ12LE:
+ bits_per_pixel = 16;
+ break;
+ default:
+ BOOST_REQUIRE_MESSAGE (false, "unexpected pixel format " << image->pixel_format());
+ }
+
+ /* error handling? */
+ png_structp png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING, reinterpret_cast<void*>(const_cast<Image*>(image.get())), png_error_fn, 0);
+ BOOST_REQUIRE (png_ptr);
+
+ Memory state;
+
+ png_set_write_fn (png_ptr, &state, png_write_data, png_flush);
+
+ png_infop info_ptr = png_create_info_struct(png_ptr);
+ BOOST_REQUIRE (info_ptr);
+
+ png_set_IHDR (png_ptr, info_ptr, image->size().width, image->size().height, bits_per_pixel, png_color_type, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_DEFAULT, PNG_FILTER_TYPE_DEFAULT);
+
+ auto const width = image->size().width;
+ auto const height = image->size().height;
+ auto const stride = image->stride()[0];
+
+ vector<vector<uint8_t>> data_to_write(height);
+ for (int y = 0; y < height; ++y) {
+ data_to_write[y].resize(stride);
+ }
+
+ switch (image->pixel_format()) {
+ case AV_PIX_FMT_RGB24:
+ for (int y = 0; y < height; ++y) {
+ memcpy(data_to_write[y].data(), image->data()[0] + y * stride, stride);
+ }
+ break;
+ case AV_PIX_FMT_XYZ12LE:
+ /* 16-bit pixel values must be written MSB first */
+ for (int y = 0; y < height; ++y) {
+ data_to_write[y].resize(stride);
+ uint8_t* original = image->data()[0] + y * stride;
+ for (int x = 0; x < width * 3; ++x) {
+ data_to_write[y][x * 2] = original[1];
+ data_to_write[y][x * 2 + 1] = original[0];
+ original += 2;
+ }
+ }
+ break;
+ default:
+ break;
+ }
+
+ png_byte ** row_pointers = reinterpret_cast<png_byte**>(png_malloc(png_ptr, image->size().height * sizeof(png_byte *)));
+ for (int y = 0; y < height; ++y) {
+ row_pointers[y] = reinterpret_cast<png_byte*>(data_to_write[y].data());
+ }
+
+ png_write_info (png_ptr, info_ptr);
+ png_write_image (png_ptr, row_pointers);
+ png_write_end (png_ptr, info_ptr);
+
+ png_destroy_write_struct (&png_ptr, &info_ptr);
+ png_free (png_ptr, row_pointers);
+
+ dcp::ArrayData(state.data, state.size).write(file);
+}
+
+
+void
+check_ffmpeg (boost::filesystem::path ref, boost::filesystem::path check, int audio_tolerance)
+{
+ int const r = system (String::compose("ffcmp -t %1 %2 %3", audio_tolerance, ref.string(), check.string()).c_str());
+ BOOST_REQUIRE_EQUAL (WEXITSTATUS(r), 0);
+}
+
+void
+check_one_frame (boost::filesystem::path dcp_dir, int64_t index, boost::filesystem::path ref)
+{
+ dcp::DCP dcp (dcp_dir);
+ dcp.read ();
+ auto asset = dynamic_pointer_cast<dcp::MonoPictureAsset> (dcp.cpls().front()->reels().front()->main_picture()->asset());
+ BOOST_REQUIRE (asset);
+ auto frame = asset->start_read()->get_frame(index);
+ auto ref_frame (new dcp::MonoPictureFrame (ref));
+
+ auto image = frame->xyz_image ();
+ auto ref_image = ref_frame->xyz_image ();
+
+ BOOST_REQUIRE (image->size() == ref_image->size());
+
+ int off = 0;
+ for (int y = 0; y < ref_image->size().height; ++y) {
+ for (int x = 0; x < ref_image->size().width; ++x) {
+ BOOST_REQUIRE_EQUAL (ref_image->data(0)[off], image->data(0)[off]);
+ BOOST_REQUIRE_EQUAL (ref_image->data(1)[off], image->data(1)[off]);
+ BOOST_REQUIRE_EQUAL (ref_image->data(2)[off], image->data(2)[off]);
+ ++off;
+ }
+ }
+}
+
+boost::filesystem::path
+dcp_file (shared_ptr<const Film> film, string prefix)
+{
+ using namespace boost::filesystem;
+
+ vector<directory_entry> matches;
+ std::copy_if(recursive_directory_iterator(film->dir(film->dcp_name())), recursive_directory_iterator(), std::back_inserter(matches), [&prefix](directory_entry const& entry) {
+ return boost::algorithm::starts_with(entry.path().leaf().string(), prefix);
+ });
+
+ BOOST_REQUIRE_MESSAGE(matches.size() == 1, "Found " << matches.size() << " files with prefix " << prefix);
+ return matches[0].path();
+}
+
+boost::filesystem::path
+subtitle_file (shared_ptr<Film> film)
+{
+ for (auto i: boost::filesystem::recursive_directory_iterator(film->directory().get() / film->dcp_name(false))) {
+ if (boost::algorithm::starts_with(i.path().leaf().string(), "sub_")) {
+ return i.path();
+ }
+ }
+
+ BOOST_REQUIRE (false);
+ /* Remove warning */
+ return boost::filesystem::path("/");
+}
+
+
+void
+make_random_file (boost::filesystem::path path, size_t size)
+{
+ dcp::File random_file(path, "wb");
+ BOOST_REQUIRE (random_file);