Compaq Multimedia Services
for OpenVMS Alpha
Programmer's Guide

Chapter 4
4	Video Capture and Playback Services
4.1	Video Capture and Playback Services Overview
4.1.1	Video Capture and Playback Channels
4.1.2	Video Capture and Playback Applications
4.2	Using Video Capture and Playback Services
4.2.1	Querying Video Capture and Playback Devices
4.2.1.1	Getting the Number of Video Devices
4.2.1.2	Getting the Capabilities of a Video Device
4.2.2	Opening a Video Device
4.2.3	Configuring Video Capture and Playback Devices
4.2.3.1	Setting and Obtaining Video Capture and Playback Format
4.2.3.2	Setting and Obtaining a Video Capture and Playback Palette
4.2.4	Setting and Obtaining the Video Input Standard Type
4.2.5	Controlling Video Data Frame and Field Modes
4.2.6	Setting and Obtaining the Video Device Port Number
4.2.7	Transferring Data to or from the Video Frame Buffer
4.2.8	Streaming Video Data Capture and Playback
4.2.8.1	Initializing the Video Data Stream
4.2.8.2	Allocating and Preparing a Data Buffer for Video Streaming
4.2.8.3	Sending a Data Buffer to a Video Device Channel
4.2.8.4	Starting Streaming on a Video Device Channel
4.2.8.5	Getting the Current Position of a Video Stream
4.2.8.6	Using Callback Functions to Manage Video Streaming
4.2.8.7	Returning Video Streaming Errors
4.2.8.8	Stopping Streaming on a Video Device Channel
4.2.8.9	Unpreparing a Data Buffer After Video Streaming
4.2.8.10	Terminating Video Data Streaming
4.2.9	Modifying the Rendering Attributes of Video Images
4.2.10	Modifying the Quality of Video Data
4.2.11	Closing a Video Device
4.2.12	Handling Errors
4.3	Video Capture and Playback Header Files
4.4	Video Capture and Playback Data Structures
4.4.1	CHANNEL_CAPS Data Structure
4.4.2	VIDEOHDR Data Structure
4.5	Using Dual Buffers
4.6	Video Capture and Playback Function Overview
4.7	Video Capture and Playback Function Descriptions
Command 47	videoClose
Command 48	videoConfigure
Command 49	videoFrame
Command 50	videoGetBrightness
Command 51	videoGetChannelCaps
Command 52	videoGetContrast
Command 53	videoGetErrorText
Command 54	videoGetFieldMode
Command 55	videoGetMirror
Command 56	videoGetNumDevs
Command 57	videoGetPortNum
Command 58	videoGetQuality
Command 59	videoGetSaturation
Command 60	videoGetSharpening
Command 61	videoGetStandard
Command 62	videoj300SetVideoOutYUVLut
Command 63	videoOpen
Command 64	videoSetBrightness
Command 65	videoSetContrast
Command 66	videoSetFieldMode
Command 67	videoSetMirror
Command 68	videoSetPortNum
Command 69	videoSetQuality
Command 70	videoSetSaturation
Command 71	videoSetSharpening
Command 72	videoSetStandard
Command 73	videoStreamAddBuffer
Command 74	videoStreamFini
Command 75	videoStreamGetError
Command 76	videoStreamGetPosition
Command 77	videoStreamInit
Command 78	videoStreamPrepareHeader
Command 79	videoStreamReset
Command 80	videoStreamStart
Command 81	videoStreamStop
Command 82	videoStreamUnprepareHeader
4.8	Video Capture and Playback Return Values
Chapter 5
5	Video Compression and Decompression Services
5.1	Video Compression and Decompression Services Overview
5.1.1	Video Compression and Decompression Architecture Overview
5.1.2	Installable Compression Manager
5.1.3	Streaming Video Compression/Decompression Interface
5.2	Using Video Compression and Decompression Services
5.2.1	Locating and Opening Video Compressors and Decompressors
5.2.2	Getting Information About Compressors and Decompressors
5.2.3	Compressing Image Data
5.2.3.1	Specifying Input and Determining Compression Formats
5.2.3.2	Initializing the Compression Sequence
5.2.3.3	Compressing the Video
5.2.3.4	Ending Compression
5.2.4	Decompressing Image Data
5.2.4.1	Specifying Input and Determining Decompression Formats
5.2.4.2	Negotiating with the Driver for Palette Usage
5.2.4.3	Specifying the Palette
5.2.4.4	Initializing the Decompression Sequence
5.2.4.5	Decompressing the Video
5.2.4.6	Ending Decompression
5.2.5	Modifying the Rendering Attributes of Uncompressed Images
5.3	Video Compression and Decompression Header Files
5.4	Video Compression and Decompression Data Structures
5.4.1	ICINFO Data Structure
5.5	Video Compression and Decompression Function Overview
5.6	Video Compression and Decompression Function Descriptions
Command 83	ICCallbackProc
Command 84	ICClose
Command 85	ICCompress
Command 86	ICCompressBegin
Command 87	ICCompressEnd
Command 88	ICCompressGetFormat
Command 89	ICCompressGetFormatSize
Command 90	ICCompressGetSize
Command 91	ICCompressPrepareHeader
Command 92	ICCompressQuery
Command 93	ICCompressUnprepareHeader
Command 94	ICDecompress
Command 95	ICDecompressBegin
Command 96	ICDecompressEnd
Command 97	ICDecompressGetFormat
Command 98	ICDecompressGetFormatSize
Command 99	ICDecompressGetPalette
Command 100	ICDecompressPrepareHeader
Command 101	ICDecompressQuery
Command 102	ICDecompressUnprepareHeader
Command 103	ICGetBrightness
Command 104	ICGetContrast
Command 105	ICGetDefaultKeyFrameRate
Command 106	ICGetDefaultQuality
Command 107	ICGetInfo
Command 108	ICGetMirror
Command 109	ICGetSaturation
Command 110	ICGetSharpening
Command 111	ICGetState
Command 112	ICGetStateSize
Command 113	ICInfo
Command 114	ICLocate
Command 115	ICOpen
Command 116	ICSetBrightness
Command 117	ICSetContrast
Command 118	ICSetMirror
Command 119	ICSetSaturation
Command 120	ICSetSharpening
Command 121	ICSetState
5.7	Video Compression and Decompression Return Values