RTSPFormatPCM Class Reference

Linear PCM Format for RTSP Streaming. More...

#include <RTSPFormat.h>

Inheritance diagram for RTSPFormatPCM:

Public Member Functions
	RTSPFormatPCM (AudioInfo info, int fragmentSize=640)
virtual AudioInfo	audioInfo ()
void	begin (AudioInfo info)
int	convert (void *data, int samples)
	Convert to network format.
AudioInfo	defaultConfig () override
const char *	format (char *buffer, int len) override
	Provide format 10 or 11.
virtual int	fragmentSize ()
	Fragment (=write) size in bytes.
AudioInfo	info ()
virtual const char *	name ()
virtual int	readHeader (uint8_t *data)
	Optional header: e.g. rfc2250.
int	rtpPayloadType () override
	default dynamic
void	setFragmentSize (int fragmentSize)
	Defines the fragment size in bytes.
void	setName (const char *name)
	Defines the name of the stream.
void	setTimerPeriodUs (int period)
	Defines the timer period in microseconds.
virtual void	setUseRfc2250Header (bool)
	Optional: Configure RFC2250 header usage (default: no-op)
virtual int	timerPeriodUs ()
	Timer period in microseconds.
virtual int	timestampIncrement ()
	Fragment size in samples.
virtual bool	useRfc2250Header () const

Protected Member Functions
int	bytesPerSample ()
int	channels ()
int	getTimerPeriod (int fragmentSize)
	Get the timer period for streaming.
const char *	payloadFormat ()
int	sampleRate ()

Protected Attributes
AudioInfo	cfg {16000, 1, 16}
int	fragment_size = 640
const char *	name_str = "RTSPAudioTools"
char	payload_fromat [30]
const char *	STD_URL_PRE_SUFFIX = "trackID"
int	timer_period_us = 10000

Detailed Description

Linear PCM Format for RTSP Streaming.

RTSPFormatPCM implements the RTSPFormat interface for linear PCM audio, the most common uncompressed audio format. This class:

• Generates SDP media descriptions for L16 (Linear 16-bit) RTP payload
• Handles byte order conversion from host to network format (big-endian)
• Calculates appropriate fragment sizes and timing for smooth streaming
• Supports arbitrary sample rates and channel configurations

See also

https://en.wikipedia.org/wiki/RTP_payload_formats

Note

Automatically handles endian conversion for network transmission

Member Function Documentation

audioInfo()

virtual AudioInfo audioInfo ( )

inlinevirtualinherited

Reimplemented in RTSPFormatMP3.

begin()

void begin ( AudioInfo  info )

inlinevirtual

Reimplemented from RTSPFormat.

convert()

int convert ( void *  data, int  samples  )

inlinevirtual

Convert to network format.

Parameters

data
byteSize

Reimplemented from RTSPFormat.

defaultConfig()

AudioInfo defaultConfig ( )

inlineoverridevirtual

Implements RTSPFormat.

format()

const char * format ( char *  buffer, int  len  )

inlineoverridevirtual

Provide format 10 or 11.

Parameters

buffer
len

Returns

const char*

Implements RTSPFormat.

getTimerPeriod()

int getTimerPeriod ( int  fragmentSize )

inlineprotected

Get the timer period for streaming.

Returns

Timer period in microseconds between audio packets

rtpPayloadType()

int rtpPayloadType ( )

inlineoverridevirtual

default dynamic

Reimplemented from RTSPFormat.

setUseRfc2250Header()

virtual void setUseRfc2250Header ( bool  )

inlinevirtualinherited

Optional: Configure RFC2250 header usage (default: no-op)

Reimplemented in RTSPFormatMP3.

timerPeriodUs()

virtual int timerPeriodUs ( )

inlinevirtualinherited

Timer period in microseconds.

Reimplemented in RTSPFormatADPCM< AudioEncoder >, and RTSPFormatMP3.

timestampIncrement()

virtual int timestampIncrement ( )

inlinevirtualinherited

Fragment size in samples.

Reimplemented in RTSPFormatMP3.

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The documentation for this class was generated from the following file:

• src/AudioTools/Communication/RTSP/RTSPFormat.h