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/*
* Oreka -- A media capture and retrieval platform
*
* Copyright (C) 2005, orecx LLC
*
* http://www.orecx.com
*
* This program is free software, distributed under the terms of
* the GNU General Public License.
* Please refer to http://www.gnu.org/copyleft/gpl.html
*
*/
#ifndef __AUDIOCAPTURE_H__
#define __AUDIOCAPTURE_H__
#include "time.h"
#include "StdString.h"
#include "OrkBase.h"
#include "boost/shared_ptr.hpp"
typedef enum
{
UnknownAudio = 0,
PcmAudio = 1,
AlawAudio = 2,
UlawAudio = 3,
InvalidAudio = 4
} AudioEncodingEnum;
/**
* Serialization friendly details struct
*/
#define MEDIA_CHUNK_MARKER 0x2A2A2A2A // corresponds to "****"
class DLL_IMPORT_EXPORT AudioChunkDetails
{
public:
AudioChunkDetails();
void Clear();
int m_marker;
AudioEncodingEnum m_encoding;
unsigned int m_numBytes;
unsigned int m_timestamp; // usually relative timestamp measured in samples
unsigned int m_arrivalTimestamp; // usually unix timestamp of arrival
unsigned int m_sequenceNumber;
unsigned int m_sampleRate;
char m_rtpPayloadType; // -1 if none
unsigned char m_channel; // 0 if mono, 1 or 2 if stereo
};
/**
* This class represents a piece of audio.
*/
class DLL_IMPORT_EXPORT AudioChunk
{
public:
AudioChunk();
~AudioChunk();
/** Allocate a new empty buffer (zeroed) */
void* CreateBuffer(size_t numBytes, AudioChunkDetails& details);
/** Copy external buffer to internal buffer. Create internal buffer if necessary */
void SetBuffer(void* pBuffer, size_t numBytes, AudioChunkDetails& details);
/** Computes the Root-Mean-Square power value of the buffer */
double ComputeRms();
/** Compute the RMS decibel value of the buffer with a 0 dB reference being the maximum theoretical RMS power of the buffer (2^15) */
double ComputeRmsDb();
int GetNumSamples();
int GetNumBytes();
int GetSampleRate();
double GetDurationSec();
AudioEncodingEnum GetEncoding();
AudioChunkDetails* GetDetails();
void SetDetails(AudioChunkDetails* details);
void * m_pBuffer;
private:
AudioChunkDetails m_details;
};
typedef boost::shared_ptr<AudioChunk> AudioChunkRef;
class DLL_IMPORT_EXPORT CaptureEvent
{
public:
CaptureEvent();
#define DIR_IN "in"
#define DIR_OUT "out"
#define DIR_UNKN "unkn"
typedef enum {
DirIn = 0,
DirOut = 1,
DirUnkn = 2
} DirectionEnum;
static CStdString DirectionToString(int);
static int DirectionToEnum(CStdString& dir);
#define ET_UNKNOWN "unknown"
#define ET_START "start"
#define ET_STOP "stop"
#define ET_DIRECTION "direction"
#define ET_REMOTEPARTY "remoteparty"
#define ET_LOCALPARTY "localparty"
#define ET_LOCALENTRYPOINT "localentrypoint"
#define ET_KEYVALUE "keyvalue"
#define ET_LOCALIP "localip"
#define ET_REMOTEIP "remoteip"
#define ET_LOCALMAC "localmac"
#define ET_REMOTEMAC "remotemac"
#define ET_INVALID "invalid"
typedef enum
{
EtUnknown = 0,
EtStart = 1,
EtStop = 2,
EtDirection = 3,
EtRemoteParty = 4,
EtLocalParty = 5,
EtLocalEntryPoint = 6,
EtKeyValue = 7,
EtLocalIp = 8,
EtRemoteIp = 9,
EtLocalMac = 10,
EtRemoteMac = 11,
EtInvalid = 12
} EventTypeEnum;
static CStdString EventTypeToString(int eventTypeEnum);
static int EventTypeToEnum(CStdString&);
time_t m_timestamp;
EventTypeEnum m_type;
CStdString m_key;
CStdString m_value;
};
typedef boost::shared_ptr<CaptureEvent> CaptureEventRef;
#endif
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