OpenShot Library | libopenshot  0.3.3
ChunkWriter.h
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1 
9 // Copyright (c) 2008-2019 OpenShot Studios, LLC
10 //
11 // SPDX-License-Identifier: LGPL-3.0-or-later
12 
13 #ifndef OPENSHOT_CHUNK_WRITER_H
14 #define OPENSHOT_CHUNK_WRITER_H
15 
16 #include "ReaderBase.h"
17 #include "WriterBase.h"
18 #include "FFmpegWriter.h"
19 #include "CacheMemory.h"
20 #include "Json.h"
21 
22 #include <cmath>
23 #include <ctime>
24 #include <iostream>
25 #include <fstream>
26 #include <cstdio>
27 #include <sstream>
28 #include <unistd.h>
29 #include <omp.h>
30 #include <QtCore/QDir>
31 
32 
33 namespace openshot
34 {
62  class ChunkWriter : public WriterBase
63  {
64  private:
65  std::string path;
66  int64_t chunk_count;
67  int64_t chunk_size;
68  int64_t frame_count;
69  bool is_open;
70  bool is_writing;
71  openshot::ReaderBase *local_reader;
72  openshot::FFmpegWriter *writer_thumb;
73  openshot::FFmpegWriter *writer_preview;
74  openshot::FFmpegWriter *writer_final;
75  std::shared_ptr<Frame> last_frame;
76  bool last_frame_needed;
77  std::string default_extension;
78  std::string default_vcodec;
79  std::string default_acodec;
80 
82  void create_folder(std::string path);
83 
85  std::string get_chunk_path(int64_t chunk_number, std::string folder, std::string extension);
86 
88  bool is_chunk_valid();
89 
91  void write_json_meta_data();
92 
93  public:
94 
98  ChunkWriter(std::string path, openshot::ReaderBase *reader);
99 
101  void Close();
102 
104  int64_t GetChunkSize() { return chunk_size; };
105 
107  bool IsOpen() { return is_open; };
108 
110  void Open();
111 
114  void SetChunkSize(int64_t new_size) { chunk_size = new_size; };
115 
118  void WriteFrame(std::shared_ptr<openshot::Frame> frame);
119 
123  void WriteFrame(int64_t start, int64_t length);
124 
129  void WriteFrame(openshot::ReaderBase* reader, int64_t start, int64_t length);
130 
131  };
132 
133 }
134 
135 #endif
openshot::ChunkWriter::Open
void Open()
Open writer.
Definition: ChunkWriter.cpp:280
FFmpegWriter.h
Header file for FFmpegWriter class.
WriterBase.h
Header file for WriterBase class.
openshot::ChunkWriter::IsOpen
bool IsOpen()
Determine if writer is open or closed.
Definition: ChunkWriter.h:107
openshot
This namespace is the default namespace for all code in the openshot library.
Definition: Compressor.h:28
openshot::ChunkWriter::WriteFrame
void WriteFrame(std::shared_ptr< openshot::Frame > frame)
Add a frame to the stack waiting to be encoded.
Definition: ChunkWriter.cpp:64
openshot::ChunkWriter::GetChunkSize
int64_t GetChunkSize()
Get the chunk size (number of frames to write in each chunk)
Definition: ChunkWriter.h:104
openshot::FFmpegWriter
This class uses the FFmpeg libraries, to write and encode video files and audio files.
Definition: FFmpegWriter.h:116
openshot::ChunkWriter::SetChunkSize
void SetChunkSize(int64_t new_size)
Set the chunk size (number of frames to write in each chunk)
Definition: ChunkWriter.h:114
CacheMemory.h
Header file for CacheMemory class.
path
path
Definition: FFmpegWriter.cpp:1479
ReaderBase.h
Header file for ReaderBase class.
openshot::ChunkWriter::Close
void Close()
Close the writer.
Definition: ChunkWriter.cpp:209
openshot::ReaderBase
This abstract class is the base class, used by all readers in libopenshot.
Definition: ReaderBase.h:75
openshot::ChunkWriter::ChunkWriter
ChunkWriter(std::string path, openshot::ReaderBase *reader)
Constructor for ChunkWriter. Throws one of the following exceptions.
Definition: ChunkWriter.cpp:19
Json.h
Header file for JSON class.
openshot::ChunkWriter
This class takes any reader and generates a special type of video file, built with chunks of small vi...
Definition: ChunkWriter.h:62
openshot::WriterBase
This abstract class is the base class, used by writers. Writers are types of classes that encode vide...
Definition: WriterBase.h:69