/* If you are using an installed libdcp, these #includes would need to be changed to
#include <libdcp/dcp.h>
#include <libdcp/cpl.h>
-#include <libdcp/picture_asset.h>
+#include <libdcp/mono_picture_asset.h>
... etc. ...
*/
#include "dcp.h"
#include "cpl.h"
-#include "picture_asset.h"
-#include "sound_asset.h"
+#include "mono_picture_mxf.h"
+#include "mono_picture_mxf_writer.h"
+#include "sound_mxf.h"
+#include "sound_mxf_writer.h"
#include "reel.h"
-
-/* This method returns the filename of the JPEG2000 file to use for a given frame.
- In this example, we are using the same file for each frame, so we don't bother
- looking at the frame parameter, but it will called with frame=0, frame=1, ...
-*/
-std::string
-video_frame (int /* frame */)
-{
- return "examples/help.j2c";
-}
+#include "file.h"
+#include "reel_mono_picture_asset.h"
+#include "reel_sound_asset.h"
int
main ()
{
- /* Make a DCP object. "My Film DCP" is the directory name for the DCP */
- libdcp::DCP dcp ("My Film DCP");
+ /* Create a directory to put the DCP in */
+ boost::filesystem::create_directory ("DCP");
- /* Now make a CPL object.
+ /* Make a picture MXF. This is a file which combines JPEG2000 files together to make
+ up the video of the DCP. First, create the object, specifying a frame rate of 24 frames
+ per second.
+ */
- "My Film" is the title that will be shown on the projector / TMS when the DCP is ingested.
- FEATURE is the type that the projector will list the DCP as.
- 24 is the frame rate, and the DCP will be 48 frames long (ie 2 seconds at 24 fps).
- */
- boost::shared_ptr<libdcp::CPL> cpl (new libdcp::CPL ("My Film DCP", "My Film", libdcp::FEATURE, 24, 48));
+ boost::shared_ptr<dcp::MonoPictureMXF> picture_mxf (new dcp::MonoPictureMXF (dcp::Fraction (24, 1)));
- /* And add the CPL to the DCP */
- dcp.add_cpl (cpl);
+ /* Start off a write to it */
+ boost::shared_ptr<dcp::PictureMXFWriter> picture_writer = picture_mxf->start_write ("DCP/picture.mxf", dcp::SMPTE, false);
- /* Now make a `picture asset'. This is a collection of the JPEG2000 files that make up the picture, one per frame.
- Here we're using a function (video_frame) to obtain the name of the JPEG2000 file for each frame.
+ /* Write 24 frames of the same JPEG2000 file */
+ dcp::File picture ("examples/help.j2c");
+ for (int i = 0; i < 24; ++i) {
+ picture_writer->write (picture.data(), picture.size());
+ }
- The result will be an MXF file written to the directory "My Film DCP" (which should be the same as the DCP's
- directory above) called "video.mxf".
+ /* And finish off */
+ picture_writer->finalize ();
- The other parameters specify the entry_point (the frame at which the projector should start showing the picture),
- the frame rate, the number of frames and the resolution of the frames; 1998x1080 is the DCI Flat specification
- for 2K projectors.
- */
- boost::shared_ptr<libdcp::MonoPictureAsset> picture_asset (
- new libdcp::MonoPictureAsset (video_frame, "My Film DCP", "video.mxf", 0, 24, 48, false, libdcp::Size (1998, 1080), false)
- );
-
- /* Now we will create a `sound asset', which is made up of a WAV file for each channel of audio. Here we're using
- stereo, so we add two WAV files to a vector.
-
- We could add more files here to use more channels; the file order is:
- Left
- Right
- Centre
- LFE (sub)
- Left surround
- Right surround
+ /* Now create a sound MXF. As before, create an object and a writer.
+ When creating the object we specify the sampling rate (48kHz) and the number of channels (2).
*/
- std::vector<std::string> sound_files;
- sound_files.push_back ("examples/sine_440_-12dB.wav");
- sound_files.push_back ("examples/sine_880_-12dB.wav");
-
- /* Now we can create the sound asset using these files */
- boost::shared_ptr<libdcp::SoundAsset> sound_asset (
- new libdcp::SoundAsset (sound_files, "My Film DCP", "audio.mxf", 0, 24, 48, false, false)
- );
-
- /* Now that we have the assets, we can create a Reel to put them in and add it to the CPL */
- cpl->add_reel (
- boost::shared_ptr<libdcp::Reel> (
- new libdcp::Reel (picture_asset, sound_asset, boost::shared_ptr<libdcp::SubtitleAsset> ())
- )
- );
-
- /* Finally, we call this to write the XML description files to the DCP. After this, the DCP
- is ready to ingest and play.
+ boost::shared_ptr<dcp::SoundMXF> sound_mxf (new dcp::SoundMXF (dcp::Fraction (24, 1), 48000, 2));
+ boost::shared_ptr<dcp::SoundMXFWriter> sound_writer = sound_mxf->start_write ("DCP/sound.mxf", dcp::SMPTE);
+
+ /* Write some sine waves */
+ float* audio[2];
+ audio[0] = new float[48000];
+ audio[1] = new float[48000];
+ for (int i = 0; i < 48000; ++i) {
+ audio[0][i] = sin (2 * M_PI * i * 440 / 48000) * 0.25;
+ audio[1][i] = sin (2 * M_PI * i * 880 / 48000) * 0.25;
+ }
+ sound_writer->write (audio, 48000);
+
+ /* And tidy up */
+ delete[] audio[0];
+ delete[] audio[1];
+ sound_writer->finalize ();
+
+ /* Now create a reel */
+ boost::shared_ptr<dcp::Reel> reel (new dcp::Reel ());
+
+ /* Add picture and sound to it. The zeros are the `entry points', i.e. the first
+ (video) frame from the MXFs that the reel should play.
*/
- libdcp::XMLMetadata metadata;
- dcp.write_xml (metadata);
-
+ reel->add (boost::shared_ptr<dcp::ReelPictureAsset> (new dcp::ReelMonoPictureAsset (picture_mxf, 0)));
+ reel->add (boost::shared_ptr<dcp::ReelSoundAsset> (new dcp::ReelSoundAsset (sound_mxf, 0)));
+
+ /* Make a CPL with this reel */
+ boost::shared_ptr<dcp::CPL> cpl (new dcp::CPL ("My film", dcp::FEATURE));
+ cpl->add (reel);
+
+ /* Write the DCP */
+ dcp::DCP dcp ("DCP");
+ dcp.add (cpl);
+ dcp.add (picture_mxf);
+ dcp.add (sound_mxf);
+ dcp.write_xml (dcp::SMPTE);
+
return 0;
}
projects / libdcp.git / blobdiff