//*****************************************************************************
//
// Enable the Speex encoder/decoder and allow the quality setting to be set
// by a single decimal argument.
//
//*****************************************************************************
int
Cmd_speex(int argc, char *argv[])
{
unsigned long ulTemp;
//
// Clear the pass through flag.
//
HWREGBITW(&g_ulFlags, FLAG_BYPASS) = 0;
//
// Check for an argument that is specifying a quality setting.
//
if(argc == 2)
{
//
// Convert the value to a numeric value.
//
ulTemp = ustrtoul(argv[1], 0, 10);
//
// Rail the quality setting at 4.
//
if(ulTemp <= 4)
{
g_iQuality = (int)ulTemp;
//
// Set the quality setting.
//
SpeexEncodeQualitySet(g_iQuality);
UARTprintf("Speex Encoder Quality set to %d\n", g_iQuality);
}
else
{
UARTprintf("Encoder Quality not changed, value must be (1-4).\n");
}
}
return(0);
}
//*****************************************************************************
//
//! Initialize the encoder's state to prepare for encoding new frames.
//!
//! \param iSampleRate is the sample rate of the incoming audio.
//! \param iComplexity is the complexity setting for the encoder.
//! \param iQuality is the quality setting for the encoder.
//!
//! This function will initializes the encoder by setting the sample rate,
//! complexity and quality settings. The \e iComplexity and \e iQuality
//! settings are explained further in the Speex documentation.
//!
//! \return This function returns 0.
//
//*****************************************************************************
int32_t
SpeexEncodeInit(int iSampleRate, int iComplexity, int iQuality)
{
const SpeexMode *psMode;
//
// Clear out the flags for this instance.
//
g_sSpeexEncoder.ui32Flags = 0;
//
// Read out the current encoder mode.
//
psMode = speex_lib_get_mode(SPEEX_MODEID_NB);
//
// Create a new decoder state in narrow band mode.
//
g_sSpeexEncoder.pvState = speex_encoder_init(psMode);
//
// Initialize the bit stream.
//
speex_bits_init(&g_sSpeexEncoder.sBits);
//
// Set the quality.
//
SpeexEncodeQualitySet(iQuality);
//
// Set the complexity and sample rate for the encoder.
//
speex_encoder_ctl(g_sSpeexEncoder.pvState, SPEEX_SET_COMPLEXITY,
&iComplexity);
speex_encoder_ctl(g_sSpeexEncoder.pvState, SPEEX_SET_SAMPLING_RATE,
&iSampleRate);
return(0);
}