Audaspace  1.3.0
A high level audio library.
FFMPEGReader.h
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2  * Copyright 2009-2016 Jörg Müller
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
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10  * Unless required by applicable law or agreed to in writing, software
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13  * See the License for the specific language governing permissions and
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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 
33 #include <string>
34 #include <memory>
35 
36 struct AVCodecContext;
37 extern "C" {
38 #include <libavformat/avformat.h>
39 }
40 
42 
50 {
51 private:
55  int m_position;
56 
60  DeviceSpecs m_specs;
61 
65  Buffer m_pkgbuf;
66 
70  int m_pkgbuf_left;
71 
75  AVFormatContext* m_formatCtx;
76 
80  AVCodecContext* m_codecCtx;
81 
85  AVFrame* m_frame;
86 
90  AVIOContext* m_aviocontext;
91 
95  int m_stream;
96 
100  convert_f m_convert;
101 
105  std::shared_ptr<Buffer> m_membuffer;
106 
110  data_t* m_membuf;
111 
115  int64_t m_membufferpos;
116 
120  bool m_tointerleave;
121 
128  AUD_LOCAL int decode(AVPacket& packet, Buffer& buffer);
129 
133  AUD_LOCAL void init();
134 
135  // delete copy constructor and operator=
136  FFMPEGReader(const FFMPEGReader&) = delete;
137  FFMPEGReader& operator=(const FFMPEGReader&) = delete;
138 
139 public:
146  FFMPEGReader(std::string filename);
147 
154  FFMPEGReader(std::shared_ptr<Buffer> buffer);
155 
159  virtual ~FFMPEGReader();
160 
169  static int read_packet(void* opaque, uint8_t* buf, int buf_size);
170 
179  static int64_t seek_packet(void* opaque, int64_t offset, int whence);
180 
181  virtual bool isSeekable() const;
182  virtual void seek(int position);
183  virtual int getLength() const;
184  virtual int getPosition() const;
185  virtual Specs getSpecs() const;
186  virtual void read(int& length, bool& eos, sample_t* buffer);
187 };
188 
convert_f
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
Specs
Specification of a sound source.
Definition: Specification.h:110
ConverterFunctions.h
Defines several conversion functions between different sample formats.
FFMPEGReader::read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Reads data to a memory buffer.
FFMPEGReader::~FFMPEGReader
virtual ~FFMPEGReader()
Destroys the reader and closes the file.
FFMPEGReader::seek
virtual void seek(int position)
Seeks to a specific position in the source.
FFMPEGReader::read
virtual void read(int &length, bool &eos, sample_t *buffer)
Request to read the next length samples out of the source.
FFMPEGReader
This class reads a sound file via ffmpeg.
Definition: FFMPEGReader.h:50
DeviceSpecs
Specification of a sound device.
Definition: Specification.h:120
IReader
This class represents a sound source as stream or as buffer which can be read for example by another ...
Definition: IReader.h:35
FFMPEGReader::seek_packet
static int64_t seek_packet(void *opaque, int64_t offset, int whence)
Seeks within data.
FFMPEGReader::FFMPEGReader
FFMPEGReader(std::string filename)
Creates a new reader.
FFMPEGReader::FFMPEGReader
FFMPEGReader(std::shared_ptr< Buffer > buffer)
Creates a new reader.
AUD_PLUGIN_API
#define AUD_PLUGIN_API
Used for exporting symbols in the shared library.
Definition: Audaspace.h:94
Buffer.h
The Buffer class.
AUD_LOCAL
#define AUD_LOCAL
Used for hiding symbols from export in the shared library.
Definition: Audaspace.h:80
FFMPEGReader::getLength
virtual int getLength() const
Returns an approximated length of the source in samples.
FFMPEGReader::isSeekable
virtual bool isSeekable() const
Tells whether the source provides seeking functionality or not.
Buffer
This class is a simple buffer in RAM which is 32 Byte aligned and provides resize functionality.
Definition: Buffer.h:34
data_t
unsigned char data_t
Sample data type (format samples)
Definition: Audaspace.h:129
AUD_NAMESPACE_END
#define AUD_NAMESPACE_END
Closes the audaspace namespace aud.
Definition: Audaspace.h:119
FFMPEGReader::getSpecs
virtual Specs getSpecs() const
Returns the specification of the reader.
IReader.h
The IReader interface.
sample_t
float sample_t
Sample type.(float samples)
Definition: Audaspace.h:126
AUD_NAMESPACE_BEGIN
#define AUD_NAMESPACE_BEGIN
Opens the audaspace namespace aud.
Definition: Audaspace.h:116
FFMPEGReader::getPosition
virtual int getPosition() const
Returns the position of the source as a sample count value.