MMProgRef - What's New...

Reprint Courtesy of International Business Machines Corporation, © International Business Machines Corporation

Multimedia Programming Reference

Introduction What's New... MCI Functions High-Level Macro Service Functions Subsystem Messages Notification Messages MCI Command Messages String Commands Memory Playlist Commands Graphic Button Control Secondary Window Functions MMIO Functions MMIO Messages CODEC Messages DIVE Functions Real-Time MIDI Functions SPI Functions Data Stream State Table SMH Messages DDCMD Messages VSD Commands SHD Messages SHC Messages Data Types Types of MIDI Messages Multimedia Specification Overview Resource Interchange File Format Multimedia File Formats RIFF Compound Files and Elements - Sharing and Access Return Codes Notices Glossary

This release of the **OS/2 Multimedia Programming Reference** includes the following:

• Additional playlist commands:

• -SEMPOST_OPERATION
• -SEMWAIT_OPERATION

See Memory Playlist Commands for a description of these commands.

• MCI_BUFFER and MCI_MIXSETUP messages and associated data structures. These messages enable use of the Direct Audio RouTines (DART), which allow applications to use a high-speed method of communication with the audio device.
• MCI_DOS_QUEUE flag for the MCI_OPEN message
• Enhanced DIVE capabilities including:

• Transparent blitting to the screen using DiveSetTransparentBlitMode
• Rotation of the output image when blitting to the screen (see the description of **fInvert** in the SETUP_BLITTER structure)
• Blitting of changed lines using DiveBlitImageLines

• JPEGOPTIONS supporting extended JPEG I/O procedure information
• Additional flags for MCI_CUE to allow digital video devices to seek to a specified position and to display or hide the video window when cueing the media
• Real-Time MIDI Functions
• Reorganization of String Commands

The string commands are organized into the following categories: System Commands, Required Commands, Basic Commands, and device-type specific command categories including CD audio, CD/XA, digital video, MIDI, videodisc player, video overlay, and waveform audio. Read the introduction to each of these sections carefully to understand how these categories relate to one another, where to find the string command you're looking for, and why it's located in the category that it is.