Sound utility methods. More...

Instance Methods
(instancetype)	- init

Class Methods
(int)	+ calculateDataLengthFloatPreciseWithDuration:clockRate:channelCount:
	Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count. More...

(int)	+ calculateDataLengthFloatPreciseWithDuration:config:
	Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count. More...

(int)	+ calculateDataLengthFloatWithDuration:clockRate:channelCount:
	Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count. More...

(int)	+ calculateDataLengthFloatWithDuration:config:
	Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count. More...

(int)	+ calculateDataLengthFromTimestampDelta:channelCount:
	Calculates a data length in bytes given a timestamp delta and channel count. More...

(int)	+ calculateDataLengthFromTimestampDelta:channelCount:bytesPerSample:
	Calculates a data length in bytes given a timestamp delta, channel count, and number of bytes per sample. More...

(int)	+ calculateDataLengthPreciseWithDuration:clockRate:channelCount:
	Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count. More...

(int)	+ calculateDataLengthPreciseWithDuration:config:
	Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count. More...

(int)	+ calculateDataLengthWithDuration:clockRate:channelCount:
	Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count. More...

(int)	+ calculateDataLengthWithDuration:config:
	Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count. More...

(int)	+ calculateDurationFloatWithDataLength:clockRate:channelCount:
	Calculates the duration of an audio chunk given its data length (the number of bytes), clock rate, and channel count. More...

(int)	+ calculateDurationFloatWithDataLength:config:
	Calculates the duration of an audio chunk given its data length (the number of bytes), clock rate, and channel count. More...

(int)	+ calculateDurationFromSystemTimestampDelta:
	Calculates a duration in milliseconds given a system timestamp delta in ticks. More...

(int)	+ calculateDurationFromTimestampDelta:clockRate:
	Calculates a duration in milliseconds given a timestamp delta and its clock rate. More...

(int)	+ calculateDurationWithDataLength:clockRate:channelCount:
	Calculates the duration of an audio chunk given its data length (the number of bytes), clock rate, and channel count. More...

(int)	+ calculateDurationWithDataLength:config:
	Calculates the duration of an audio chunk given its data length (the number of bytes), clock rate, and channel count. More...

(int)	+ calculateOutputLengthForChannelCountWithInputLength:inputChannelCount:outputChannelCount:
	Calculates the length of an output data buffer after conversion from an input to an output channel count. More...

(int)	+ calculateSystemTimestampDeltaFromDuration:
	Calculates a system timestamp delta in ticks given a duration in milliseconds. More...

(long long)	+ calculateSystemTimestampDeltaFromTimestampDelta:clockRate:
	Calculates a system timestamp delta given a timestamp delta and its clock rate. More...

(int)	+ calculateTimestampDeltaFromDataLength:channelCount:
	Calculates a timestamp delta given a data length and channel count. More...

(int)	+ calculateTimestampDeltaFromDataLength:channelCount:bytesPerSample:
	Calculates a timestamp delta given a data length in bytes, channel count, and number of bytes per sample. More...

(int)	+ calculateTimestampDeltaFromDuration:clockRate:
	Calculates a timestamp delta given its clock rate and a duration in milliseconds. More...

(long long)	+ calculateTimestampDeltaFromSystemTimestampDelta:clockRate:
	Calculates a timestamp delta given its clock rate and a system timestamp delta. More...

(FMLiveSwitchDataBuffer *)	+ convertChannelCountWithInput:inputChannelCount:output:outputChannelCount:
	Converts a data buffer to a new channel count. More...

(float)	+ floatFromShort:
	Converts a short value to a floating-point value. More...

(FMLiveSwitchDataBuffer *)	+ monoToStereoWithMono:stereo:
	Converts each sample into two identical samples. More...

(short)	+ readPcmShortWithInput:index:
	Reads a PCM short value from a byte array. More...

(short)	+ shortFromFloat:
	Converts a floating-point value to a short value. More...

(FMLiveSwitchSoundUtility *)	+ soundUtility

(FMLiveSwitchDataBuffer *)	+ stereoToMonoWithStereo:mono:
	Converts each pair of samples into one mixed sample. More...

(void)	+ writePcmShortWithInput:output:index:
	Writes a PCM short value to a byte array. More...

Detailed Description

Sound utility methods.

Method Documentation

◆ calculateDataLengthFloatPreciseWithDuration:clockRate:channelCount:

+ (int) calculateDataLengthFloatPreciseWithDuration:	(double)	duration
clockRate:	(int)	clockRate
channelCount:	(int)	channelCount

Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count.

Parameters

duration	The duration in ms.
clockRate	The clock rate.
channelCount	The channel count.

◆ calculateDataLengthFloatPreciseWithDuration:config:

+ (int) calculateDataLengthFloatPreciseWithDuration:	(double)	duration
config:	(FMLiveSwitchAudioConfig *)	config

Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count.

Parameters

duration	The duration in ms.
config	The configuration.

◆ calculateDataLengthFloatWithDuration:clockRate:channelCount:

+ (int) calculateDataLengthFloatWithDuration:	(int)	duration
clockRate:	(int)	clockRate
channelCount:	(int)	channelCount

Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count.

Parameters

duration	The duration in ms.
clockRate	The clock rate.
channelCount	The channel count.

◆ calculateDataLengthFloatWithDuration:config:

+ (int) calculateDataLengthFloatWithDuration:	(int)	duration
config:	(FMLiveSwitchAudioConfig *)	config

Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count.

Parameters

duration	The duration in ms.
config	The configuration.

◆ calculateDataLengthFromTimestampDelta:channelCount:

+ (int) calculateDataLengthFromTimestampDelta:	(int)	timestampDelta
channelCount:	(int)	channelCount

Calculates a data length in bytes given a timestamp delta and channel count.

Parameters

timestampDelta	The timestamp delta.
channelCount	The channel count.

◆ calculateDataLengthFromTimestampDelta:channelCount:bytesPerSample:

+ (int) calculateDataLengthFromTimestampDelta:	(int)	timestampDelta
channelCount:	(int)	channelCount
bytesPerSample:	(int)	bytesPerSample

Calculates a data length in bytes given a timestamp delta, channel count, and number of bytes per sample.

Parameters

timestampDelta	The timestamp delta.
channelCount	The channel count.
bytesPerSample	The number of bytes per sample.

◆ calculateDataLengthPreciseWithDuration:clockRate:channelCount:

+ (int) calculateDataLengthPreciseWithDuration:	(double)	duration
clockRate:	(int)	clockRate
channelCount:	(int)	channelCount

Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count.

Parameters

duration	The duration in ms.
clockRate	The clock rate.
channelCount	The channel count.

◆ calculateDataLengthPreciseWithDuration:config:

+ (int) calculateDataLengthPreciseWithDuration:	(double)	duration
config:	(FMLiveSwitchAudioConfig *)	config

Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count.

Parameters

duration	The duration in ms.
config	The configuration.

◆ calculateDataLengthWithDuration:clockRate:channelCount:

+ (int) calculateDataLengthWithDuration:	(int)	duration
clockRate:	(int)	clockRate
channelCount:	(int)	channelCount

Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count.

Parameters

duration	The duration in ms.
clockRate	The clock rate.
channelCount	The channel count.

◆ calculateDataLengthWithDuration:config:

+ (int) calculateDataLengthWithDuration:	(int)	duration
config:	(FMLiveSwitchAudioConfig *)	config

Calculates the number of bytes in a given audio chunk given its duration (ms), clock rate, and channel count.

Parameters

duration	The duration in ms.
config	The configuration.

◆ calculateDurationFloatWithDataLength:clockRate:channelCount:

+ (int) calculateDurationFloatWithDataLength:	(int)	dataLength
clockRate:	(int)	clockRate
channelCount:	(int)	channelCount

Calculates the duration of an audio chunk given its data length (the number of bytes), clock rate, and channel count.

Parameters

dataLength	The length of the audio chunk.
clockRate	The clock rate.
channelCount	The channel count.

◆ calculateDurationFloatWithDataLength:config:

+ (int) calculateDurationFloatWithDataLength:	(int)	dataLength
config:	(FMLiveSwitchAudioConfig *)	config

Calculates the duration of an audio chunk given its data length (the number of bytes), clock rate, and channel count.

Parameters

dataLength	The length of the audio chunk.
config	The configuration.

◆ calculateDurationFromSystemTimestampDelta:

+ (int) calculateDurationFromSystemTimestampDelta: (int) systemTimestampDelta

Calculates a duration in milliseconds given a system timestamp delta in ticks.

Parameters

systemTimestampDelta The system timestamp delta.

◆ calculateDurationFromTimestampDelta:clockRate:

+ (int) calculateDurationFromTimestampDelta:	(int)	timestampDelta
clockRate:	(int)	clockRate

Calculates a duration in milliseconds given a timestamp delta and its clock rate.

Parameters

timestampDelta	The timestamp delta.
clockRate	The clock rate.

◆ calculateDurationWithDataLength:clockRate:channelCount:

+ (int) calculateDurationWithDataLength:	(int)	dataLength
clockRate:	(int)	clockRate
channelCount:	(int)	channelCount

Calculates the duration of an audio chunk given its data length (the number of bytes), clock rate, and channel count.

Parameters

dataLength	The length of the audio chunk.
clockRate	The clock rate.
channelCount	The channel count.

◆ calculateDurationWithDataLength:config:

+ (int) calculateDurationWithDataLength:	(int)	dataLength
config:	(FMLiveSwitchAudioConfig *)	config

Calculates the duration of an audio chunk given its data length (the number of bytes), clock rate, and channel count.

Parameters

dataLength	The length of the audio chunk.
config	The configuration.

◆ calculateOutputLengthForChannelCountWithInputLength:inputChannelCount:outputChannelCount:

+ (int) calculateOutputLengthForChannelCountWithInputLength:	(int)	inputLength
inputChannelCount:	(int)	inputChannelCount
outputChannelCount:	(int)	outputChannelCount

Calculates the length of an output data buffer after conversion from an input to an output channel count.

Parameters

inputLength	The input data buffer length.
inputChannelCount	The input channel count.
outputChannelCount	The output channel count.

◆ calculateSystemTimestampDeltaFromDuration:

+ (int) calculateSystemTimestampDeltaFromDuration: (int) duration

Calculates a system timestamp delta in ticks given a duration in milliseconds.

Parameters

duration The duration in milliseconds.

◆ calculateSystemTimestampDeltaFromTimestampDelta:clockRate:

+ (long long) calculateSystemTimestampDeltaFromTimestampDelta:	(long long)	timestampDelta
clockRate:	(int)	clockRate

Calculates a system timestamp delta given a timestamp delta and its clock rate.

Parameters

timestampDelta	The timestamp delta.
clockRate	The clock rate.

◆ calculateTimestampDeltaFromDataLength:channelCount:

+ (int) calculateTimestampDeltaFromDataLength:	(int)	dataLength
channelCount:	(int)	channelCount

Calculates a timestamp delta given a data length and channel count.

Parameters

dataLength	The data length in bytes.
channelCount	The channel count.

◆ calculateTimestampDeltaFromDataLength:channelCount:bytesPerSample:

+ (int) calculateTimestampDeltaFromDataLength:	(int)	dataLength
channelCount:	(int)	channelCount
bytesPerSample:	(int)	bytesPerSample

Calculates a timestamp delta given a data length in bytes, channel count, and number of bytes per sample.

Parameters

dataLength	The data length in bytes.
channelCount	The channel count.
bytesPerSample	The number of bytes per sample.

◆ calculateTimestampDeltaFromDuration:clockRate:

+ (int) calculateTimestampDeltaFromDuration:	(int)	duration
clockRate:	(int)	clockRate

Calculates a timestamp delta given its clock rate and a duration in milliseconds.

Parameters

duration	The duration in milliseconds.
clockRate	The clock rate.

◆ calculateTimestampDeltaFromSystemTimestampDelta:clockRate:

+ (long long) calculateTimestampDeltaFromSystemTimestampDelta:	(long long)	systemTimestampDelta
clockRate:	(int)	clockRate

Calculates a timestamp delta given its clock rate and a system timestamp delta.

Parameters

systemTimestampDelta	The system timestamp delta.
clockRate	The clock rate.

◆ convertChannelCountWithInput:inputChannelCount:output:outputChannelCount:

+ (FMLiveSwitchDataBuffer*) convertChannelCountWithInput:	(FMLiveSwitchDataBuffer *)	input
inputChannelCount:	(int)	inputChannelCount
output:	(FMLiveSwitchDataBuffer *)	output
outputChannelCount:	(int)	outputChannelCount

Converts a data buffer to a new channel count.

The input data buffer length must be a multiple of the input frame size. If the input channel count is greater than the output channel count, the input channel count must divide evenly into the output channel count, and vice versa if the output channel count is greater than the input channel count.

Parameters

input	The input data buffer.
inputChannelCount	The input channel count.
output	The output data buffer.
outputChannelCount	The output channel count.

◆ floatFromShort:

+ (float) floatFromShort: (short) value

Converts a short value to a floating-point value.

Parameters

value The short value.

Returns: The floating-point value.

◆ init

- (instancetype) init

◆ monoToStereoWithMono:stereo:

+ (FMLiveSwitchDataBuffer*) monoToStereoWithMono:	(FMLiveSwitchDataBuffer *)	mono
stereo:	(FMLiveSwitchDataBuffer *)	stereo

Converts each sample into two identical samples.

Returns: A new FMLiveSwitchDataBufferPooled or null.

◆ readPcmShortWithInput:index:

+ (short) readPcmShortWithInput:	(NSMutableData *)	input
index:	(int)	index

Reads a PCM short value from a byte array.

Parameters

input	The source byte array.
index	The source index in the byte array.

Returns: Short value. This is an int for performance reasons but can be safely cast to a short as needed.

◆ shortFromFloat:

+ (short) shortFromFloat: (float) value

Converts a floating-point value to a short value.

Parameters

value The floating-point value.

Returns: The short value.

◆ soundUtility

+ (FMLiveSwitchSoundUtility*) soundUtility

◆ stereoToMonoWithStereo:mono:

+ (FMLiveSwitchDataBuffer*) stereoToMonoWithStereo:	(FMLiveSwitchDataBuffer *)	stereo
mono:	(FMLiveSwitchDataBuffer *)	mono

Converts each pair of samples into one mixed sample.

Returns: A new FMLiveSwitchDataBufferPooled or null.

◆ writePcmShortWithInput:output:index:

+ (void) writePcmShortWithInput:	(short)	input
output:	(NSMutableData *)	output
index:	(int)	index

Writes a PCM short value to a byte array.

Parameters

input	The short value to write.
output	The target byte array.
index	The target index in the byte array.

Instance Methods

Class Methods

Detailed Description

Method Documentation

◆ calculateDataLengthFloatPreciseWithDuration:clockRate:channelCount:

◆ calculateDataLengthFloatPreciseWithDuration:config:

◆ calculateDataLengthFloatWithDuration:clockRate:channelCount:

◆ calculateDataLengthFloatWithDuration:config:

◆ calculateDataLengthFromTimestampDelta:channelCount:

◆ calculateDataLengthFromTimestampDelta:channelCount:bytesPerSample:

◆ calculateDataLengthPreciseWithDuration:clockRate:channelCount:

◆ calculateDataLengthPreciseWithDuration:config:

◆ calculateDataLengthWithDuration:clockRate:channelCount:

◆ calculateDataLengthWithDuration:config:

◆ calculateDurationFloatWithDataLength:clockRate:channelCount:

◆ calculateDurationFloatWithDataLength:config:

◆ calculateDurationFromSystemTimestampDelta:

◆ calculateDurationFromTimestampDelta:clockRate:

◆ calculateDurationWithDataLength:clockRate:channelCount:

◆ calculateDurationWithDataLength:config:

◆ calculateOutputLengthForChannelCountWithInputLength:inputChannelCount:outputChannelCount:

◆ calculateSystemTimestampDeltaFromDuration:

◆ calculateSystemTimestampDeltaFromTimestampDelta:clockRate:

◆ calculateTimestampDeltaFromDataLength:channelCount:

◆ calculateTimestampDeltaFromDataLength:channelCount:bytesPerSample:

◆ calculateTimestampDeltaFromDuration:clockRate:

◆ calculateTimestampDeltaFromSystemTimestampDelta:clockRate:

◆ convertChannelCountWithInput:inputChannelCount:output:outputChannelCount:

◆ floatFromShort:

◆ init

◆ monoToStereoWithMono:stereo:

◆ readPcmShortWithInput:index:

◆ shortFromFloat:

◆ soundUtility

◆ stereoToMonoWithStereo:mono:

◆ writePcmShortWithInput:output:index: