Panda3D
Loading...
Searching...
No Matches
ffmpegVideo.cxx
Go to the documentation of this file.
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
20TypeHandle 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 */
27FfmpegVideo(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 */
39FfmpegVideo(const SubfileInfo &info) :
40 MovieVideo(info.get_filename())
41{
42 _filename = info.get_filename();
43 _subfile_info = info;
44}
45
46/**
47 * xxx
48 */
52
53/**
54 * Open this video, returning a MovieVideoCursor.
55 */
56PT(MovieVideoCursor) FfmpegVideo::
57open() {
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 */
70PT(MovieVideo) FfmpegVideo::
71make(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 */
88write_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 */
97TypedWritable *FfmpegVideo::
98make_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 */
113void FfmpegVideo::
114fillin(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...
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...
virtual void write_datagram(BamWriter *manager, Datagram &dg)
Writes the contents of this object to the datagram for shipping out to a Bam file.
virtual ~FfmpegVideo()
xxx
static void register_with_read_factory()
Tells the BamReader how to create objects of type FfmpegVideo.
The name of a file, such as a texture file or an Egg file.
Definition filename.h:44
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.
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.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.
PANDA 3D SOFTWARE Copyright (c) Carnegie Mellon University.