You should have received a copy of the GNU General Public License
along with libdcp. If not, see <http://www.gnu.org/licenses/>.
+ In addition, as a special exception, the copyright holders give
+ permission to link the code of portions of this program with the
+ OpenSSL library under certain conditions as described in each
+ individual source file, and distribute linked combinations
+ including the two.
+
+ You must obey the GNU General Public License in all respects
+ for all of the code used other than OpenSSL. If you modify
+ file(s) with this exception, you may extend this exception to your
+ version of the file(s), but you are not obligated to do so. If you
+ do not wish to do so, delete this exception statement from your
+ version. If you delete this exception statement from all source
+ files in the program, then also delete it here.
*/
#include "j2k.h"
return dcp::decompress_j2k (data.data().get(), data.size(), reduce);
}
+#ifdef LIBDCP_OPENJPEG2
+
class ReadBuffer
{
public:
delete reinterpret_cast<ReadBuffer*>(data);
}
+static void
+error_callback (char const * msg, void *)
+{
+ throw MiscError (msg);
+}
+
/** Decompress a JPEG2000 image to a bitmap.
* @param data JPEG2000 data.
* @param size Size of data in bytes.
shared_ptr<dcp::OpenJPEGImage>
dcp::decompress_j2k (uint8_t* data, int64_t size, int reduce)
{
+ DCP_ASSERT (reduce >= 0);
+
uint8_t const jp2_magic[] = {
0x00,
0x00,
throw MiscError ("could not create JPEG2000 stream");
}
+ opj_set_error_handler(decoder, error_callback, 00);
+
opj_stream_set_read_function (stream, read_function);
ReadBuffer* buffer = new ReadBuffer (data, size);
opj_stream_set_user_data (stream, buffer, read_free_function);
image->y1 = rint (float(image->y1) / pow (2.0f, reduce));
return shared_ptr<OpenJPEGImage> (new OpenJPEGImage (image));
}
+#endif
+
+#ifdef LIBDCP_OPENJPEG1
+/** 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::OpenJPEGImage>
+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<OpenJPEGImage> (new OpenJPEGImage (image));
+}
+#endif
+#ifdef LIBDCP_OPENJPEG2
class WriteBuffer
{
public:
return reinterpret_cast<WriteBuffer*>(data)->seek (nb_bytes);
}
-static void
-error_callback (char const * msg, void *)
-{
- throw MiscError (msg);
-}
-
+/** @xyz Picture to compress. Parts of xyz's data WILL BE OVERWRITTEN by libopenjpeg so xyz cannot be re-used
+ * after this call; see opj_j2k_encode where if l_reuse_data is false it will set l_tilec->data = l_img_comp->data.
+ */
Data
dcp::compress_j2k (shared_ptr<const OpenJPEGImage> xyz, int bandwidth, int frames_per_second, bool threed, bool fourk)
{
/* Set encoding parameters to default values */
opj_cparameters_t parameters;
opj_set_default_encoder_parameters (¶meters);
+ if (fourk) {
+ parameters.numresolution = 7;
+ }
parameters.rsiz = fourk ? OPJ_PROFILE_CINEMA_4K : OPJ_PROFILE_CINEMA_2K;
parameters.cp_comment = strdup ("libdcp");
opj_stream_set_user_data (stream, buffer, write_free_function);
if (!opj_start_compress (encoder, xyz->opj_image(), stream)) {
- throw MiscError ("could not start JPEG2000 encoding");
+ if ((errno & 0x61500) == 0x61500) {
+ /* We've had one of the magic error codes from our patched openjpeg */
+ throw MiscError (String::compose ("could not start JPEG2000 encoding (%1)", errno & 0xff));
+ } else {
+ throw MiscError ("could not start JPEG2000 encoding");
+ }
}
if (!opj_encode (encoder, stream)) {
return enc;
}
+#endif
+
+#ifdef LIBDCP_OPENJPEG1
+Data
+dcp::compress_j2k (shared_ptr<const OpenJPEGImage> xyz, int bandwidth, int frames_per_second, bool threed, bool fourk)
+{
+ /* Set the max image and component sizes based on frame_rate */
+ int max_cs_len = ((float) bandwidth) / 8 / frames_per_second;
+ if (threed) {
+ /* In 3D we have only half the normal bandwidth per eye */
+ max_cs_len /= 2;
+ }
+ int const max_comp_size = max_cs_len / 1.25;
+
+ /* get a J2K compressor handle */
+ opj_cinfo_t* cinfo = opj_create_compress (CODEC_J2K);
+ if (cinfo == 0) {
+ throw MiscError ("could not create JPEG2000 encoder");
+ }
+
+ /* Set encoding parameters to default values */
+ opj_cparameters_t parameters;
+ opj_set_default_encoder_parameters (¶meters);
+ if (fourk) {
+ parameters.numresolution = 7;
+ }
+
+ /* Set default cinema parameters */
+ parameters.tile_size_on = false;
+ parameters.cp_tdx = 1;
+ parameters.cp_tdy = 1;
+
+ /* Tile part */
+ parameters.tp_flag = 'C';
+ parameters.tp_on = 1;
+
+ /* Tile and Image shall be at (0,0) */
+ parameters.cp_tx0 = 0;
+ parameters.cp_ty0 = 0;
+ parameters.image_offset_x0 = 0;
+ parameters.image_offset_y0 = 0;
+
+ /* Codeblock size = 32x32 */
+ parameters.cblockw_init = 32;
+ parameters.cblockh_init = 32;
+ parameters.csty |= 0x01;
+
+ /* The progression order shall be CPRL */
+ parameters.prog_order = CPRL;
+
+ /* No ROI */
+ parameters.roi_compno = -1;
+
+ parameters.subsampling_dx = 1;
+ parameters.subsampling_dy = 1;
+
+ /* 9-7 transform */
+ parameters.irreversible = 1;
+
+ parameters.tcp_rates[0] = 0;
+ parameters.tcp_numlayers++;
+ parameters.cp_disto_alloc = 1;
+ parameters.cp_rsiz = fourk ? CINEMA4K : CINEMA2K;
+ if (fourk) {
+ parameters.numpocs = 2;
+ parameters.POC[0].tile = 1;
+ parameters.POC[0].resno0 = 0;
+ parameters.POC[0].compno0 = 0;
+ parameters.POC[0].layno1 = 1;
+ parameters.POC[0].resno1 = parameters.numresolution - 1;
+ parameters.POC[0].compno1 = 3;
+ parameters.POC[0].prg1 = CPRL;
+ parameters.POC[1].tile = 1;
+ parameters.POC[1].resno0 = parameters.numresolution - 1;
+ parameters.POC[1].compno0 = 0;
+ parameters.POC[1].layno1 = 1;
+ parameters.POC[1].resno1 = parameters.numresolution;
+ parameters.POC[1].compno1 = 3;
+ parameters.POC[1].prg1 = CPRL;
+ }
+
+ parameters.cp_comment = strdup ("libdcp");
+ parameters.cp_cinema = fourk ? CINEMA4K_24 : CINEMA2K_24;
+
+ /* 3 components, so use MCT */
+ parameters.tcp_mct = 1;
+
+ /* set max image */
+ parameters.max_comp_size = max_comp_size;
+ parameters.tcp_rates[0] = ((float) (3 * xyz->size().width * xyz->size().height * 12)) / (max_cs_len * 8);
+
+ /* Set event manager to null (openjpeg 1.3 bug) */
+ cinfo->event_mgr = 0;
+
+ /* Setup the encoder parameters using the current image and user parameters */
+ opj_setup_encoder (cinfo, ¶meters, xyz->opj_image ());
+
+ opj_cio_t* cio = opj_cio_open ((opj_common_ptr) cinfo, 0, 0);
+ if (cio == 0) {
+ opj_destroy_compress (cinfo);
+ throw MiscError ("could not open JPEG2000 stream");
+ }
+
+ int const r = opj_encode (cinfo, cio, xyz->opj_image(), 0);
+ if (r == 0) {
+ opj_cio_close (cio);
+ opj_destroy_compress (cinfo);
+ throw MiscError ("JPEG2000 encoding failed");
+ }
+
+ Data enc (cio->buffer, cio_tell (cio));
+
+ opj_cio_close (cio);
+ free (parameters.cp_comment);
+ opj_destroy_compress (cinfo);
+
+ return enc;
+}
+
+#endif
projects / libdcp.git / blobdiff