MP3FromPCM Class Reference

#include <MP3FromPCM.hh>

Collaboration diagram for MP3FromPCM:

[legend]List of all members.

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Detailed Description

Uses internally ffmpeg for this conversion.

Definition at line 37 of file MP3FromPCM.hh.

Public Member Functions
virtual	~MP3FromPCM ()
Static Public Member Functions
static MP3FromPCM *	createNew (UsageEnvironment &env, FramedSource *audio_source)
	Static method.
Protected Member Functions
	MP3FromPCM (UsageEnvironment &env, FramedSource *audio_source)
	Constructor.
Private Member Functions
virtual void	doGetNextFrame ()
	Inherited function. Used to process next frame to send.
void	afterGettingFrame1 (unsigned frameSize, unsigned numTruncatedBytes, struct timeval presentationTime, unsigned durationInMicroseconds)
	Called just after afterGettingFrame.
char const *	MIMEtype () const
Static Private Member Functions
static void	afterGettingFrame (void *clientData, unsigned frameSize, unsigned numTruncatedBytes, struct timeval presentationTime, unsigned durationInMicroseconds)
	Called after getting a frame.
Private Attributes
bool	_initialized
	Specify whether the class is initialized or not.
OStreamAudioEncoder *	_audio_encoder
	Pointer to a OStreamAudioEncoder instance.
FramedSource *	_audio_source
	"FramedSource" means something "discrete" being sent/parsed/used.
unsigned char *	_input_buffer
	Internal buffer for PCM data.
unsigned int	_input_buffer_size

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Constructor & Destructor Documentation

MP3FromPCM::~MP3FromPCM

(

)

[virtual]

Definition at line 34 of file MP3FromPCM.cpp.

References _audio_encoder, _initialized, _input_buffer, and NULL.

MP3FromPCM::MP3FromPCM	(	UsageEnvironment &	env,
		FramedSource *	audio_source
	)			[protected]

See also:

createNew-

Definition at line 48 of file MP3FromPCM.cpp.

References _audio_encoder, _initialized, MAX_AUDIO_PACKET_SIZE, NULL, and OSTREAM_ENCODING_MP3.

Referenced by createNew().

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Member Function Documentation

void MP3FromPCM::afterGettingFrame	(	void *	clientData,
		unsigned	frameSize,
		unsigned	numTruncatedBytes,
		struct timeval	presentationTime,
		unsigned	durationInMicroseconds
	)			[static, private]

Called from the main loop of LiveMedia, in a event-driven fashion. Will be a callback function, being static.

Parameters:

	clientData	Usually a "this" pointer to MP3FromPCM.
	frameSize	Size of the received packet.
	numTruncatedBytes	If the buffer's size is littler than the packet received then there will be some truncated bytes.
	presentationTime	Time of presentation of the packet. Used for reordering.
	durationInMicroseconds	Duration of the packet receiving.

Definition at line 81 of file MP3FromPCM.cpp.

References afterGettingFrame1().

Referenced by doGetNextFrame().

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void MP3FromPCM::afterGettingFrame1	(	unsigned	frameSize,
		unsigned	numTruncatedBytes,
		struct timeval	presentationTime,
		unsigned	durationInMicroseconds
	)			[private]

See also:

afterGettingFrame.

Definition at line 90 of file MP3FromPCM.cpp.

References _audio_encoder, _input_buffer, _input_buffer_size, DEBUG_PRINT, and OStreamAudioEncoder::encode_audio_frame().

Referenced by afterGettingFrame().

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MP3FromPCM * MP3FromPCM::createNew	(	UsageEnvironment &	env,
		FramedSource *	audio_source
	)			[static]

Parameters:

	env	UsageEnvironment, see LiveMedia doc. here http://www.live555.com/liveMedia/public/doxygen/html
	audio_source	A source of the kind of AudioInputDevice.

See also:

LinuxAudioInputDevice, WindowsAudioInputDevice.

Definition at line 28 of file MP3FromPCM.cpp.

References MP3FromPCM().

Referenced by OStreamOnDemandSMS::createNewStreamSource().

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void MP3FromPCM::doGetNextFrame

(

)

[private, virtual]

Definition at line 62 of file MP3FromPCM.cpp.

References _audio_source, _input_buffer, _input_buffer_size, afterGettingFrame(), and AUDIO_BLOCK_SIZE.

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char const * MP3FromPCM::MIMEtype

(

)

const [private]

Returns:

MIME type string. Something like "audio/MPEG"

Definition at line 116 of file MP3FromPCM.cpp.

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Member Data Documentation

OStreamAudioEncoder* MP3FromPCM::_audio_encoder [private]

Definition at line 98 of file MP3FromPCM.hh.

Referenced by afterGettingFrame1(), MP3FromPCM(), and ~MP3FromPCM().

FramedSource* MP3FromPCM::_audio_source [private]

In this case its a PCM discrete data.

Definition at line 104 of file MP3FromPCM.hh.

Referenced by doGetNextFrame().

bool MP3FromPCM::_initialized [private]

Definition at line 95 of file MP3FromPCM.hh.

Referenced by MP3FromPCM(), and ~MP3FromPCM().

unsigned char* MP3FromPCM::_input_buffer [private]

Definition at line 107 of file MP3FromPCM.hh.

Referenced by afterGettingFrame1(), doGetNextFrame(), and ~MP3FromPCM().

unsigned int MP3FromPCM::_input_buffer_size [private]

Definition at line 108 of file MP3FromPCM.hh.

Referenced by afterGettingFrame1(), and doGetNextFrame().

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

• MP3FromPCM.hh
• MP3FromPCM.cpp

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