Use openjpeg2.

1 files changed, 50 insertions, 8 deletions

diff --git a/src/util.cc b/src/util.cc
index 4ac3685c..bb1f9834 100644
--- a/src/util.cc
+++ b/src/util.cc
@@ -190,6 +190,41 @@ libdcp::content_kind_from_string (string type)
 	assert (false);
 }
 
+class ReadBuffer
+{
+public:
+	ReadBuffer (uint8_t* data, int64_t size)
+		: _data (data)
+		, _size (size)
+		, _offset (0)
+	{}
+
+	OPJ_SIZE_T read (void* buffer, OPJ_SIZE_T nb_bytes)
+	{
+		int64_t N = min (nb_bytes, _size - _offset);
+		memcpy (buffer, _data + _offset, N);
+		_offset += N;
+		return N;
+	}
+
+private:
+	uint8_t* _data;
+	OPJ_SIZE_T _size;
+	OPJ_SIZE_T _offset;
+};
+
+static OPJ_SIZE_T
+read_function (void* buffer, OPJ_SIZE_T nb_bytes, void* data)
+{
+	return reinterpret_cast<ReadBuffer*>(data)->read (buffer, nb_bytes);
+}
+
+static void
+free_function (void* data)
+{
+	delete reinterpret_cast<ReadBuffer*>(data);
+}
+
 /** Decompress a JPEG2000 image to a bitmap.
  *  @param data JPEG2000 data.
  *  @param size Size of data in bytes.
@@ -202,21 +237,28 @@ libdcp::content_kind_from_string (string type)
 shared_ptr<libdcp::XYZFrame>
 libdcp::decompress_j2k (uint8_t* data, int64_t size, int reduce)
 {
-	opj_dinfo_t* decoder = opj_create_decompress (CODEC_J2K);
+	opj_codec_t* decoder = opj_create_decompress (OPJ_CODEC_J2K);
+
 	opj_dparameters_t parameters;
 	opj_set_default_decoder_parameters (&parameters);
 	parameters.cp_reduce = reduce;
 	opj_setup_decoder (decoder, &parameters);
-	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);
+
+	opj_stream_t* stream = opj_stream_default_create (OPJ_TRUE);
+	opj_stream_set_read_function (stream, read_function);
+	ReadBuffer* buffer = new ReadBuffer (data, size);
+	opj_stream_set_user_data (stream, buffer, free_function);
+
+	opj_image_t* image = 0;
+	opj_read_header (stream, decoder, &image);
+	if (opj_decode (decoder, stream, image) == OPJ_FALSE) {
+		opj_destroy_codec (decoder);
+		opj_stream_destroy (stream);
 		boost::throw_exception (DCPReadError ("could not decode JPEG2000 codestream of " + lexical_cast<string> (size) + " bytes."));
 	}
 
-	opj_destroy_decompress (decoder);
-	opj_cio_close (cio);
+	opj_destroy_codec (decoder);
+	opj_stream_destroy (stream);
 
 	image->x1 = rint (float(image->x1) / pow (2, reduce));
 	image->y1 = rint (float(image->y1) / pow (2, reduce));