Methods > Waveform analysis > AnalyzeSoundFromFileRaw method

Remarks

Starts the analysis of the given RAW audio file.

Data resulting from an analysis session can be discarded from memory using the FreeMemory method.

By default the full audio file is analyzed: in case you should only need to analyze a specific portion of the audio file, you could limit the analyzed range through the AnalyzeSoundFromFileRangeSet method.

A successful call to this method will fire the WaveAnalysisStart event followed by a number of WaveAnalysisPerc events and finally by the WaveAnalysisDone event.

Syntax

[Visual Basic]

control.AnalyzeSoundFromFileRaw (

strPathname as string,

nEncodeMode as enumRAWEncodeModes,

bIsBigEndian as enumBoolean,

nFrequency as Long,

nChannels as Long

) as enumWanErrorCodes

[C++]

short control.AnalyzeSoundFromFileRaw (

LPCTSTR strPathname,

short nEncodeMode,

short bIsBigEndian,

long nFrequency,

long nChannels

);

Parameter	Description

strPathname	String representing the absolute pathname of the input file.

nEncodeMode

Encode mode used to encode the RAW file.

Supported values are the following:

Mnemonic constant	Numeric value	Meaning
RAW_ENCODE_PCM_U8	0	RAW PCM 8 bits Unsigned
RAW_ENCODE_PCM_S8	1	RAW PCM 8 bits Signed
RAW_ENCODE_PCM_S16	2	RAW PCM 16 bits Signed
RAW_ENCODE_PCM_S24	3	RAW PCM 24 bits Signed
RAW_ENCODE_PCM_S32	4	RAW PCM 32 bits Signed
RAW_ENCODE_FLOAT32	5	RAW 32 bits floating point
RAW_ENCODE_G711_ULAW	6	RAW G711 U-LAW
RAW_ENCODE_G711_ALAW	7	RAW G711 A-LAW
RAW_ENCODE_GSM_610	8	RAW GSM 6.10
RAW_ENCODE_DIALOGIC_VOX	9	RAW Dialogic ADPCM VOX

bIsBigEndian

Boolean flag that specifies if bits order inside the RAW file are little-endian or big-endian

Supported values are the following:

Mnemonic Value	Meaning
BOOL_FALSE	The RAW file is encoded using little-endian
BOOL_TRUE	The RAW file is encoded using big-endian

nFrequency

Sample rate of the RAW file (e.g. 44100)

nChannels

Number of channels of the RAW file: 1 for Mono or 2 for Stereo

Return value

Value	Meaning

Negative value	An error occurred, check the LastError property value in order to see the error code meaning
enumWanErrorCodes.ERR_WAN_NOERROR (0)	The method call was successful.