+ shared_ptr<const MonoPictureAsset> other_picture = dynamic_pointer_cast<const MonoPictureAsset> (other);
+ assert (other_picture);
+
+ for (int i = 0; i < _intrinsic_duration; ++i) {
+ shared_ptr<const MonoPictureFrame> frame_A = get_frame (i);
+ shared_ptr<const MonoPictureFrame> frame_B = other_picture->get_frame (i);
+
+ if (!frame_buffer_equals (
+ i, opt, notes,
+ frame_A->j2k_frame()->RoData(), frame_A->j2k_frame()->Size(),
+ frame_B->j2k_frame()->RoData(), frame_B->j2k_frame()->Size()
+ )) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+bool
+StereoPictureAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, list<string>& notes) const
+{
+ if (!PictureAsset::equals (other, opt, notes)) {
+ return false;
+ }
+
+ shared_ptr<const StereoPictureAsset> other_picture = dynamic_pointer_cast<const StereoPictureAsset> (other);
+ assert (other_picture);
+
+ for (int i = 0; i < _intrinsic_duration; ++i) {
+ shared_ptr<const StereoPictureFrame> frame_A = get_frame (i);
+ shared_ptr<const StereoPictureFrame> frame_B = other_picture->get_frame (i);
+
+ if (!frame_buffer_equals (
+ i, opt, notes,
+ frame_A->j2k_frame()->Left.RoData(), frame_A->j2k_frame()->Left.Size(),
+ frame_B->j2k_frame()->Left.RoData(), frame_B->j2k_frame()->Left.Size()
+ )) {
+ return false;
+ }
+
+ if (!frame_buffer_equals (
+ i, opt, notes,
+ frame_A->j2k_frame()->Right.RoData(), frame_A->j2k_frame()->Right.Size(),
+ frame_B->j2k_frame()->Right.RoData(), frame_B->j2k_frame()->Right.Size()
+ )) {
+ return false;
+ }
+ }
+
+ return true;
+}
+
+bool
+PictureAsset::frame_buffer_equals (
+ int frame, EqualityOptions opt, list<string>& notes, uint8_t const * data_A, unsigned int size_A, uint8_t const * data_B, unsigned int size_B
+ ) const
+{
+ if (size_A == size_B && memcmp (data_A, data_B, size_A) == 0) {
+ /* Easy result; the J2K data is identical */
+ return true;
+ }
+
+ /* Decompress the images to bitmaps */
+ opj_image_t* image_A = decompress_j2k (const_cast<uint8_t*> (data_A), size_A, 0);
+ opj_image_t* image_B = decompress_j2k (const_cast<uint8_t*> (data_B), size_B, 0);
+
+ /* Compare them */
+
+ if (image_A->numcomps != image_B->numcomps) {
+ notes.push_back ("image component counts for frame " + lexical_cast<string>(frame) + " differ");
+ return false;
+ }
+
+ vector<int> abs_diffs (image_A->comps[0].w * image_A->comps[0].h * image_A->numcomps);
+ int d = 0;
+ int max_diff = 0;
+
+ for (int c = 0; c < image_A->numcomps; ++c) {
+
+ if (image_A->comps[c].w != image_B->comps[c].w || image_A->comps[c].h != image_B->comps[c].h) {
+ notes.push_back ("image sizes for frame " + lexical_cast<string>(frame) + " differ");
+ return false;
+ }
+
+ int const pixels = image_A->comps[c].w * image_A->comps[c].h;
+ for (int j = 0; j < pixels; ++j) {
+ int const t = abs (image_A->comps[c].data[j] - image_B->comps[c].data[j]);
+ abs_diffs[d++] = t;
+ max_diff = max (max_diff, t);
+ }
+ }
+
+ uint64_t total = 0;
+ for (vector<int>::iterator j = abs_diffs.begin(); j != abs_diffs.end(); ++j) {
+ total += *j;
+ }
+
+ double const mean = double (total) / abs_diffs.size ();
+
+ uint64_t total_squared_deviation = 0;
+ for (vector<int>::iterator j = abs_diffs.begin(); j != abs_diffs.end(); ++j) {
+ total_squared_deviation += pow (*j - mean, 2);
+ }
+
+ double const std_dev = sqrt (double (total_squared_deviation) / abs_diffs.size());
+
+ if (mean > opt.max_mean_pixel_error || std_dev > opt.max_std_dev_pixel_error) {
+ notes.push_back ("mean or standard deviation out of range for " + lexical_cast<string>(frame));
+ return false;
+ }
+
+ opj_image_destroy (image_A);
+ opj_image_destroy (image_B);
+
+ return true;
+}
+
+
+StereoPictureAsset::StereoPictureAsset (string directory, string mxf_name, int fps, int intrinsic_duration)
+ : PictureAsset (directory, mxf_name, 0, fps, intrinsic_duration, Size (0, 0))
+{
+ ASDCP::JP2K::MXFSReader reader;
+ if (ASDCP_FAILURE (reader.OpenRead (path().string().c_str()))) {
+ throw MXFFileError ("could not open MXF file for reading", path().string());
+ }
+
+ ASDCP::JP2K::PictureDescriptor desc;
+ if (ASDCP_FAILURE (reader.FillPictureDescriptor (desc))) {
+ throw DCPReadError ("could not read video MXF information");
+ }
+
+ _size.width = desc.StoredWidth;
+ _size.height = desc.StoredHeight;
+}
+
+shared_ptr<const StereoPictureFrame>
+StereoPictureAsset::get_frame (int n) const
+{
+ return shared_ptr<const StereoPictureFrame> (new StereoPictureFrame (path().string(), n + _entry_point));
+}
+
+shared_ptr<MonoPictureAssetWriter>
+MonoPictureAsset::start_write ()
+{
+ /* XXX: can't we use a shared_ptr here? */
+ return shared_ptr<MonoPictureAssetWriter> (new MonoPictureAssetWriter (this));
+}
+
+MonoPictureAssetWriter::MonoPictureAssetWriter (MonoPictureAsset* a)
+ : _frame_buffer (4 * Kumu::Megabyte)
+ , _asset (a)
+ , _frames_written (0)
+ , _finalized (false)
+{
+