-/** Convert a content kind to a string which can be used in a
- * <ContentKind> node.
- * @param kind ContentKind.
- * @return string.
- */
-string
-dcp::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";
- }
-
- DCP_ASSERT (false);
-}
-
-/** Convert a string from a <ContentKind> node to a libdcp ContentKind.
- * Reasonably tolerant about varying case.
- * @param kind Content kind string.
- * @return libdcp ContentKind.
- */
-dcp::ContentKind
-dcp::content_kind_from_string (string kind)
-{
- transform (kind.begin(), kind.end(), kind.begin(), ::tolower);
-
- if (kind == "feature") {
- return FEATURE;
- } else if (kind == "short") {
- return SHORT;
- } else if (kind == "trailer") {
- return TRAILER;
- } else if (kind == "test") {
- return TEST;
- } else if (kind == "transitional") {
- return TRANSITIONAL;
- } else if (kind == "rating") {
- return RATING;
- } else if (kind == "teaser") {
- return TEASER;
- } else if (kind == "policy") {
- return POLICY;
- } else if (kind == "psa") {
- return PUBLIC_SERVICE_ANNOUNCEMENT;
- } else if (kind == "advertisement") {
- return ADVERTISEMENT;
- }
-
- DCP_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<dcp::XYZImage>
-dcp::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 (String::compose ("could not decode JPEG2000 codestream of %1 bytes.", size)));
- }
-
- 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<XYZImage> (new XYZImage (image));
-}
-