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A demo program for Delphi thats play mp3 files with DirectSound/OpenAl by using the famousminimp3 library built in. No external mp3 decoder required.

For OpenAl playback make sure you have the required OpenAl libraries installed.

You need a copy of Delphi XE2 or greater. Just open the Project file andRun.

The demo program includes follow functionalities

First select your Audio Renderer DirectShow or OpenAl. Then drag and drop a mp3 file into application container.

• Chunk Stream Play (DirectShow/OpenAl)
  • decodes the mp3 frame by frame to a small buffer and streams directly to a DirectSound/OpenAl buffer. Low Memory usage.
• Stream Play (DirectShow)
  • decodes the mp3 frame by frame into a buffer before playing and streams this to a DirectSound buffer. High Memory usage.
• Write to wav
  • decodes the mp3 file and writeout to a playable wave file.

• Yes i know, the source miss some checks and cleanup steps.
• The DirectShow Playback is timer based and the OpenAl is thread based. Thatsnot renderer dependent, just different methods for streaming data. It can be exchanged between renderer.

To build a installed version of GCC 4.8.1 are required, use the batchbuildlib.bat that compile minimp3lib.cpp file.

Builds works only with GCC v4.8.1 32-bit. Depends on required___chkstk_ms. I took this fromlz4-delphi, i have no idea how to extract this dependency from libgcc.a. Leave a comment if you know how to build the lib without or with other versions.

• minimp3
  • https://github.com/lieff/minimp3
• lz4-delphi - only used chkstk_ms.obj
  • https://github.com/Hugie/lz4-delphi
• OpenAl Headers for Delphi
  • https://www.noeska.com/doal/