Audaspace  1.4.0
A high level audio library.
FFMPEGReader.h
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2  * Copyright 2009-2016 Jörg Müller
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4  * Licensed under the Apache License, Version 2.0 (the "License");
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16 
17 #pragma once
18 
19 #ifdef FFMPEG_PLUGIN
20 #define AUD_BUILD_PLUGIN
21 #endif
22 
30 #include "IReader.h"
31 #include "util/Buffer.h"
32 #include "file/FileInfo.h"
33 
34 #include <string>
35 #include <memory>
36 #include <vector>
37 
38 struct AVCodecContext;
39 extern "C" {
40 #include <libavformat/avformat.h>
41 }
42 
44 
52 {
53 private:
57  int m_position;
58 
62  DeviceSpecs m_specs;
63 
67  Buffer m_pkgbuf;
68 
72  int m_pkgbuf_left;
73 
77  AVFormatContext* m_formatCtx;
78 
82  AVCodecContext* m_codecCtx;
83 
87  AVFrame* m_frame;
88 
92  AVIOContext* m_aviocontext;
93 
97  int m_stream;
98 
102  convert_f m_convert;
103 
107  std::shared_ptr<Buffer> m_membuffer;
108 
112  data_t* m_membuf;
113 
117  long long m_membufferpos;
118 
122  bool m_tointerleave;
123 
129  AUD_LOCAL static SampleFormat convertSampleFormat(AVSampleFormat format);
130 
137  AUD_LOCAL int decode(AVPacket& packet, Buffer& buffer);
138 
143  AUD_LOCAL void init(int stream);
144 
145  // delete copy constructor and operator=
146  FFMPEGReader(const FFMPEGReader&) = delete;
147  FFMPEGReader& operator=(const FFMPEGReader&) = delete;
148 
149 public:
157  FFMPEGReader(std::string filename, int stream = 0);
158 
166  FFMPEGReader(std::shared_ptr<Buffer> buffer, int stream = 0);
167 
171  virtual ~FFMPEGReader();
172 
178  virtual std::vector<StreamInfo> queryStreams();
179 
188  static int read_packet(void* opaque, uint8_t* buf, int buf_size);
189 
198  static int64_t seek_packet(void* opaque, int64_t offset, int whence);
199 
200  virtual bool isSeekable() const;
201  virtual void seek(int position);
202  virtual int getLength() const;
203  virtual int getPosition() const;
204  virtual Specs getSpecs() const;
205  virtual void read(int& length, bool& eos, sample_t* buffer);
206 };
207 
virtual int getLength() const =0
Returns an approximated length of the source in samples.
#define AUD_NAMESPACE_BEGIN
Opens the audaspace namespace aud.
Definition: Audaspace.h:116
This class represents a sound source as stream or as buffer which can be read for example by another ...
Definition: IReader.h:34
virtual void seek(int position)=0
Seeks to a specific position in the source.
void(* convert_f)(data_t *target, data_t *source, int length)
The function template for functions converting from one sample format to another, having the same par...
Definition: ConverterFunctions.h:35
virtual void read(int &length, bool &eos, sample_t *buffer)=0
Request to read the next length samples out of the source.
unsigned char data_t
Sample data type (format samples)
Definition: Audaspace.h:129
SampleFormat
The format of a sample.
Definition: Specification.h:46
Specification of a sound source.
Definition: Specification.h:109
This class reads a sound file via ffmpeg.
Definition: FFMPEGReader.h:51
This class is a simple buffer in RAM which is 32 Byte aligned and provides resize functionality...
Definition: Buffer.h:33
Specification of a sound device.
Definition: Specification.h:119
virtual Specs getSpecs() const =0
Returns the specification of the reader.
The IReader interface.
Defines several conversion functions between different sample formats.
float sample_t
Sample type.(float samples)
Definition: Audaspace.h:126
The FileInfo data structures.
#define AUD_NAMESPACE_END
Closes the audaspace namespace aud.
Definition: Audaspace.h:119
virtual int getPosition() const =0
Returns the position of the source as a sample count value.
#define AUD_PLUGIN_API
Used for exporting symbols in the shared library.
Definition: Audaspace.h:94
virtual bool isSeekable() const =0
Tells whether the source provides seeking functionality or not.
#define AUD_LOCAL
Used for hiding symbols from export in the shared library.
Definition: Audaspace.h:80
The Buffer class.