Allow incremental writing of picture MXFs.

[libdcp.git] / src / picture_asset.cc

diff --git a/src/picture_asset.cc b/src/picture_asset.cc
index e5d88a6eed09e385b5d3ba068afb060f91a57c8d..f3d523963abec33620447b14e51aa1b5b93dcae3 100644 (file)
--- a/src/picture_asset.cc
+++ b/src/picture_asset.cc
@@ -46,8 +46,9 @@ using boost::dynamic_pointer_cast;
 using boost::lexical_cast;
 using namespace libdcp;
 
-PictureAsset::PictureAsset (string directory, string mxf_name, boost::signals2::signal<void (float)>* progress, int fps, int length)
-       : MXFAsset (directory, mxf_name, progress, fps, length)
+PictureAsset::PictureAsset (string directory, string mxf_name, boost::signals2::signal<void (float)>* progress, int fps, int intrinsic_duration, Size size)
+       : MXFAsset (directory, mxf_name, progress, fps, intrinsic_duration)
+       , _size (size)
 {
 
 }
@@ -59,9 +60,9 @@ PictureAsset::write_to_cpl (ostream& s) const
          << "          <Id>urn:uuid:" << _uuid << "</Id>\n"
          << "          <AnnotationText>" << _file_name << "</AnnotationText>\n"
          << "          <EditRate>" << _fps << " 1</EditRate>\n"
-         << "          <IntrinsicDuration>" << _length << "</IntrinsicDuration>\n"
-         << "          <EntryPoint>0</EntryPoint>\n"
-         << "          <Duration>" << _length << "</Duration>\n"
+         << "          <IntrinsicDuration>" << _intrinsic_duration << "</IntrinsicDuration>\n"
+         << "          <EntryPoint>" << _entry_point << "</EntryPoint>\n"
+         << "          <Duration>" << _duration << "</Duration>\n"
          << "          <FrameRate>" << _fps << " 1</FrameRate>\n"
          << "          <ScreenAspectRatio>" << _size.width << " " << _size.height << "</ScreenAspectRatio>\n"
          << "        </MainPicture>\n";
@@ -134,11 +135,10 @@ MonoPictureAsset::MonoPictureAsset (
        string mxf_name,
        boost::signals2::signal<void (float)>* progress,
        int fps,
-       int length,
+       int intrinsic_duration,
        Size size)
-       : PictureAsset (directory, mxf_name, progress, fps, length)
+       : PictureAsset (directory, mxf_name, progress, fps, intrinsic_duration, size)
 {
-       _size = size;
        construct (get_path);
 }
 
@@ -148,16 +148,21 @@ MonoPictureAsset::MonoPictureAsset (
        string mxf_name,
        boost::signals2::signal<void (float)>* progress,
        int fps,
-       int length,
+       int intrinsic_duration,
        Size size)
-       : PictureAsset (directory, mxf_name, progress, fps, length)
+       : PictureAsset (directory, mxf_name, progress, fps, intrinsic_duration, size)
 {
-       _size = size;
        construct (boost::bind (&MonoPictureAsset::path_from_list, this, _1, files));
 }
 
-MonoPictureAsset::MonoPictureAsset (string directory, string mxf_name, int fps, int length)
-       : PictureAsset (directory, mxf_name, 0, fps, length)
+MonoPictureAsset::MonoPictureAsset (string directory, string mxf_name, int fps, Size size)
+       : PictureAsset (directory, mxf_name, 0, fps, 0, size)
+{
+
+}
+
+MonoPictureAsset::MonoPictureAsset (string directory, string mxf_name, int fps, int intrinsic_duration)
+       : PictureAsset (directory, mxf_name, 0, fps, intrinsic_duration, Size (0, 0))
 {
        ASDCP::JP2K::MXFReader reader;
        if (ASDCP_FAILURE (reader.OpenRead (path().string().c_str()))) {
@@ -187,14 +192,14 @@ MonoPictureAsset::construct (boost::function<string (int)> get_path)
        picture_desc.EditRate = ASDCP::Rational (_fps, 1);
        
        ASDCP::WriterInfo writer_info;
-       fill_writer_info (&writer_info);
+       fill_writer_info (&writer_info, _uuid);
        
        ASDCP::JP2K::MXFWriter mxf_writer;
        if (ASDCP_FAILURE (mxf_writer.OpenWrite (path().string().c_str(), writer_info, picture_desc))) {
                throw MXFFileError ("could not open MXF file for writing", path().string());
        }
 
-       for (int i = 0; i < _length; ++i) {
+       for (int i = 0; i < _intrinsic_duration; ++i) {
 
                string const path = get_path (i);
 
@@ -208,7 +213,7 @@ MonoPictureAsset::construct (boost::function<string (int)> get_path)
                }
 
                if (_progress) {
-                       (*_progress) (0.5 * float (i) / _length);
+                       (*_progress) (0.5 * float (i) / _intrinsic_duration);
                }
        }
        
@@ -240,7 +245,7 @@ MonoPictureAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, li
        shared_ptr<const MonoPictureAsset> other_picture = dynamic_pointer_cast<const MonoPictureAsset> (other);
        assert (other_picture);
 
-       for (int i = 0; i < _length; ++i) {
+       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);
                
@@ -266,7 +271,7 @@ StereoPictureAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt,
        shared_ptr<const StereoPictureAsset> other_picture = dynamic_pointer_cast<const StereoPictureAsset> (other);
        assert (other_picture);
 
-       for (int i = 0; i < _length; ++i) {
+       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);
                
@@ -356,8 +361,8 @@ PictureAsset::frame_buffer_equals (
 }
 
 
-StereoPictureAsset::StereoPictureAsset (string directory, string mxf_name, int fps, int length)
-       : PictureAsset (directory, mxf_name, 0, fps, length)
+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()))) {
@@ -378,3 +383,60 @@ 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)
+{
+
+}
+
+void
+MonoPictureAssetWriter::write (uint8_t* data, int size)
+{
+       if (ASDCP_FAILURE (_j2k_parser.OpenReadFrame (data, size, _frame_buffer))) {
+               throw MiscError ("could not parse J2K frame");
+       }
+
+       if (_frames_written == 0) {
+               _j2k_parser.FillPictureDescriptor (_picture_descriptor);
+               _picture_descriptor.EditRate = ASDCP::Rational (_asset->frames_per_second(), 1);
+       
+               MXFAsset::fill_writer_info (&_writer_info, _asset->uuid());
+               
+               if (ASDCP_FAILURE (_mxf_writer.OpenWrite (_asset->path().c_str(), _writer_info, _picture_descriptor))) {
+                       throw MXFFileError ("could not open MXF file for writing", _asset->path().string());
+               }
+       }
+
+       if (ASDCP_FAILURE (_mxf_writer.WriteFrame (_frame_buffer, 0, 0))) {
+               throw MiscError ("error in writing video MXF");
+       }
+
+       _frames_written++;
+}
+
+void
+MonoPictureAssetWriter::finalize ()
+{
+       if (ASDCP_FAILURE (_mxf_writer.Finalize())) {
+               throw MiscError ("error in finalizing video MXF");
+       }
+
+       _finalized = true;
+       _asset->set_intrinsic_duration (_frames_written);
+}
+
+MonoPictureAssetWriter::~MonoPictureAssetWriter ()
+{
+       assert (_finalized);
+}