Advanced Gtk+ Sequencer
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Advanced Gtk+ Sequencer

Developer's Book

Joël Krähemann

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled "GNU Free Documentation License".

Dedication

This book is dedicated to my friend.

Table of Contents

Foreword

1. The application context

Implementations and their interfaces
The main loop property
The config property
The file property
The application mutex
Program start and termination
Abstract data connection
Common interfaces

2. XML Input/Output

Writing XML files
Reading XML files

3. Multi-/Super-threaded tree

The main loop interface

Threads in general

Pulling threads of thread pool

Worker-threads to do tic-less parallelism

Asynchronously destroy objects

Launching tasks

Async message delivery

4. The soundcard and sequencer interface

Gathering PCM information of soundcard
Obtain audio buffer
Read from MIDI device

5. AgsAudio a container of AgsChannel

AgsNotation and AgsNote

AgsAutomation and AgsAcceleration

AgsWave and AgsBuffer

AgsRecallID and AgsRecyclingContext

Dealing with recalls

Get port of recall

Open audio files

Audio container
Audio file

6. Your tree linked with AgsChannel

The pattern
Linking overview
Limitations
Hands-On

7. The recycling tree

Add and remove audio signal

8. Your audio data in AgsAudioSignal

9. Effects

Play/recall context

Hands-On instantiating an effect

AgsRecallContainer
AgsRecallAudio context
AgsRecallChannel context
AgsRecallAudioRun context
AgsRecallChannelRun context

The basic lifecycle of an effect

A closer look at effects

10. Advanced Gtk+ Sequencer's fx engine

11. Thread-safe audio ports

Get and set values

12. Putting all together

A. GNU Free Documentation License

B. Related projects

List of Tables

6.1. AGS network layer table

List of Examples

1.1. Thread application context
1.2. Audio application context
1.3. Get config value
1.4. The application context :file property
2.1. Writing XML
2.2. Reading XML
3.1. Calculating tic delay
3.2. Starting threads
3.3. Pulling threads of thread-pool
4.1. PCM information from AgsSoundcard
4.2. Get AgsSoundcard buffer
4.3. Get AgsSequencer buffer
5.1. Using AgsAudio
5.2. Using AgsNotation Clipboard
5.3. Concat AgsWave
5.4. Modify recall port
6.1. Adding AgsPattern
6.2. Prerequisites
6.3. Thread-Unsafe way
6.4. Multithread-Safe way
7.1. AgsRecycling and AgsAudioSignal
9.1. Creating AgsRecallContainer
9.2. Creating AgsEchoAudio
9.3. Creating AgsEchoChannel
9.4. Creating AgsEchoAudioRun
9.5. Creating AgsEchoChannelRun
10.1. Using ags_fx_factory_create()
12.1. Simple pattern sequencer with master playback

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