Panda3D
ffmpegVideo.cxx
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1 /**
2  * PANDA 3D SOFTWARE
3  * Copyright (c) Carnegie Mellon University. All rights reserved.
4  *
5  * All use of this software is subject to the terms of the revised BSD
6  * license. You should have received a copy of this license along
7  * with this source code in a file named "LICENSE."
8  *
9  * @file ffmpegVideo.cxx
10  * @author jyelon
11  * @date 2007-08-01
12  */
13 
14 #include "ffmpegVideo.h"
15 #include "ffmpegVideoCursor.h"
16 #include "config_ffmpeg.h"
17 #include "bamReader.h"
18 #include "dcast.h"
19 
20 TypeHandle FfmpegVideo::_type_handle;
21 
22 /**
23  * Constructs an ffmpeg video that reads its contents from the indicate
24  * filename, which may be a file in the VFS.
25  */
27 FfmpegVideo(const Filename &name) :
28  MovieVideo(name)
29 {
30  _filename = name;
31 }
32 
33 /**
34  * Constructs an ffmpeg video that reads its contents from the indicated
35  * subfile information. This is normally used for low-level purposes only;
36  * you would normally use the constructor that takes a filename.
37  */
39 FfmpegVideo(const SubfileInfo &info) :
40  MovieVideo(info.get_filename())
41 {
42  _filename = info.get_filename();
43  _subfile_info = info;
44 }
45 
46 /**
47  * xxx
48  */
50 ~FfmpegVideo() {
51 }
52 
53 /**
54  * Open this video, returning a MovieVideoCursor.
55  */
56 PT(MovieVideoCursor) FfmpegVideo::
57 open() {
58  PT(FfmpegVideoCursor) result = new FfmpegVideoCursor(this);
59  if (result->_format_ctx == nullptr) {
60  ffmpeg_cat.error() << "Could not open " << _filename << "\n";
61  return nullptr;
62  } else {
63  return result;
64  }
65 }
66 
67 /**
68  * Obtains a MovieVideo that references a file.
69  */
70 PT(MovieVideo) FfmpegVideo::
71 make(const Filename &name) {
72  return DCAST(MovieVideo, new FfmpegVideo(name));
73 }
74 
75 /**
76  * Tells the BamReader how to create objects of type FfmpegVideo.
77  */
80  BamReader::get_factory()->register_factory(get_class_type(), make_from_bam);
81 }
82 
83 /**
84  * Writes the contents of this object to the datagram for shipping out to a
85  * Bam file.
86  */
88 write_datagram(BamWriter *manager, Datagram &dg) {
89  MovieVideo::write_datagram(manager, dg);
90 }
91 
92 /**
93  * This function is called by the BamReader's factory when a new object of
94  * type FfmpegVideo is encountered in the Bam file. It should create the
95  * FfmpegVideo and extract its information from the file.
96  */
97 TypedWritable *FfmpegVideo::
98 make_from_bam(const FactoryParams &params) {
99  FfmpegVideo *video = new FfmpegVideo("");
100  DatagramIterator scan;
101  BamReader *manager;
102 
103  parse_params(params, scan, manager);
104  video->fillin(scan, manager);
105 
106  return video;
107 }
108 
109 /**
110  * This internal function is called by make_from_bam to read in all of the
111  * relevant data from the BamFile for the new FfmpegVideo.
112  */
113 void FfmpegVideo::
114 fillin(DatagramIterator &scan, BamReader *manager) {
115  MovieVideo::fillin(scan, manager);
116 }
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
void parse_params(const FactoryParams &params, DatagramIterator &scan, BamReader *&manager)
Takes in a FactoryParams, passed from a WritableFactory into any TypedWritable's make function,...
Definition: bamReader.I:275
This is the fundamental interface for extracting binary objects from a Bam file, as generated by a Ba...
Definition: bamReader.h:110
static WritableFactory * get_factory()
Returns the global WritableFactory for generating TypedWritable objects.
Definition: bamReader.I:177
This is the fundamental interface for writing binary objects to a Bam file, to be extracted later by ...
Definition: bamWriter.h:63
A class to retrieve the individual data elements previously stored in a Datagram.
An ordered list of data elements, formatted in memory for transmission over a socket or writing to a ...
Definition: datagram.h:38
An instance of this class is passed to the Factory when requesting it to do its business and construc...
Definition: factoryParams.h:36
void register_factory(TypeHandle handle, CreateFunc *func, void *user_data=nullptr)
Registers a new kind of thing the Factory will be able to create.
Definition: factory.I:73
FfmpegVideo(const Filename &name)
Constructs an ffmpeg video that reads its contents from the indicate filename, which may be a file in...
Definition: ffmpegVideo.cxx:27
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
Definition: ffmpegVideo.cxx:88
virtual ~FfmpegVideo()
xxx
Definition: ffmpegVideo.cxx:50
static void register_with_read_factory()
Tells the BamReader how to create objects of type FfmpegVideo.
Definition: ffmpegVideo.cxx:79
The name of a file, such as a texture file or an Egg file.
Definition: filename.h:39
A MovieVideo is actually any source that provides a sequence of video frames.
A MovieVideo is actually any source that provides a sequence of video frames.
Definition: movieVideo.h:38
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
Definition: movieVideo.cxx:65
This class records a particular byte sub-range within an existing file on disk.
Definition: subfileInfo.h:26
TypeHandle is the identifier used to differentiate C++ class types.
Definition: typeHandle.h:81
Base class for objects that can be written to and read from Bam files.
Definition: typedWritable.h:35
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PT(MovieVideoCursor) FfmpegVideo
Open this video, returning a MovieVideoCursor.
Definition: ffmpegVideo.cxx:56
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.