Public Attributes

OMX_AUDIO_CONFIG_CHANNELVOLUMETYPE Struct Reference
[OpenMAX IL Audio Domain]

#include <OMX_Audio.h>

List of all members.

Public Attributes

OMX_U32 nSize
OMX_VERSIONTYPE nVersion
OMX_U32 nPortIndex
OMX_U32 nChannel
OMX_BOOL bLinear
OMX_BS32 sVolume
OMX_BOOL bIsMIDI

Detailed Description

Audio Volume adjustment for a channel


Member Data Documentation

OMX_BOOL bIsMIDI

TRUE if nChannel refers to a MIDI channel, FALSE otherwise

OMX_BOOL bLinear

Is the volume to be set in linear (0.100) or logarithmic scale (mB)

OMX_U32 nChannel

channel to select from 0 to N-1, using OMX_ALL to apply volume settings to all channels

OMX_U32 nPortIndex

Port index indicating which port to set. Select the input port to set just that port's volume. Select the output port to adjust the master volume.

OMX_U32 nSize

size of the structure in bytes

OMX specification version information

Volume linear setting in the 0..100 range, OR Volume logarithmic setting for this port. The values for volume are in mB (millibels = 1/100 dB) relative to a gain of 1 (e.g. the output is the same as the input level). Values are in mB from nMax (maximum volume) to nMin mB (typically negative). Since the volume is "voltage" and not a "power", it takes a setting of -600 mB to decrease the volume by 1/2. If a component cannot accurately set the volume to the requested value, it must set the volume to the closest value BELOW the requested value. When getting the volume setting, the current actual volume must be returned.

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