AudioOpus Class Reference

#include <audioopus.h>

Public Member Functions
	AudioOpus ()
	~AudioOpus ()
void	setEncoder (int32_t fs, int nChannels)
int	encode (int frameSize, int16_t *in, uint8_t *out)

Static Public Attributes
static const int	m_bitrate = 64000
	Fixed 64kb/s bitrate (8kB/s) More...
static const int	m_maxPacketSize = 3*1276

Private Attributes
OpusEncoder *	m_encoderState
bool	m_encoderOK
QMutex	m_mutex

Detailed Description

Definition at line 28 of file audioopus.h.

Constructor & Destructor Documentation

AudioOpus()

AudioOpus::AudioOpus

(

)

Definition at line 28 of file audioopus.cpp.

                     :
    m_encoderState(0),
    m_encoderOK(false),
    m_mutex(QMutex::Recursive)
{
    qDebug("AudioOpus::AudioOpus: libopus version %s", opus_get_version_string());
}

~AudioOpus()

AudioOpus::~AudioOpus

(

)

Definition at line 36 of file audioopus.cpp.

References m_encoderState.

{
    if (m_encoderState) {
        opus_encoder_destroy(m_encoderState);
    }
}

Member Function Documentation

encode()

int AudioOpus::encode	(	int	frameSize,
		int16_t *	in,
		uint8_t *	out
	)

Definition at line 86 of file audioopus.cpp.

References m_encoderOK, m_encoderState, m_maxPacketSize, and m_mutex.

Referenced by AudioNetSink::write().

{
    QMutexLocker mutexLocker(&m_mutex);

    if (!m_encoderOK)
    {
        qWarning("AudioOpus::encode: encoder not initialized");
        return 0;
    }

    int nbBytes = opus_encode(m_encoderState, in, frameSize, out, m_maxPacketSize);

    if (nbBytes < 0)
    {
        qWarning("AudioOpus::encode failed: %s", opus_strerror(nbBytes));
        return 0;
    }
    else
    {
        return nbBytes;
    }
}

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setEncoder()

void AudioOpus::setEncoder	(	int32_t	fs,
		int	nChannels
	)

Definition at line 43 of file audioopus.cpp.

References m_bitrate, m_encoderOK, m_encoderState, and m_mutex.

Referenced by AudioNetSink::setNewCodecData().

{
    int error;
    bool newInstance = true;
    QMutexLocker mutexLocker(&m_mutex);

    if (m_encoderState) {
        opus_encoder_destroy(m_encoderState);
    }

    m_encoderState = opus_encoder_create(fs, nChannels, OPUS_APPLICATION_AUDIO, &error);

    if (error != OPUS_OK)
    {
        qWarning("AudioOpus::setEncoder: error: %s", opus_strerror(error));
        m_encoderOK = false;
        return;
    }
    else
    {
        qDebug("AudioOpus::setEncoder: fs: %d, nChannels: %d", fs, nChannels);
        m_encoderOK = true;
    }

    error = opus_encoder_ctl(m_encoderState, OPUS_SET_BITRATE(m_bitrate));

    if (error != OPUS_OK)
    {
        qWarning("AudioOpus::setEncoder: set bitrate error: %s", opus_strerror(error));
        m_encoderOK = false;
        return;
    }

    error = opus_encoder_ctl(m_encoderState, OPUS_SET_VBR(0)); // force constant bit rate

    if (error != OPUS_OK)
    {
        qWarning("AudioOpus::setEncoder: set constant bitrate error: %s", opus_strerror(error));
        m_encoderOK = false;
        return;
    }
}

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Member Data Documentation

m_bitrate

const int AudioOpus::m_bitrate = 64000

static

Fixed 64kb/s bitrate (8kB/s)

Definition at line 37 of file audioopus.h.

Referenced by AudioNetSink::AudioNetSink(), setEncoder(), AudioNetSink::setNewCodecData(), and AudioNetSink::write().

m_encoderOK

bool AudioOpus::m_encoderOK

private

Definition at line 42 of file audioopus.h.

Referenced by encode(), and setEncoder().

m_encoderState

OpusEncoder* AudioOpus::m_encoderState

private

Definition at line 41 of file audioopus.h.

Referenced by encode(), setEncoder(), and ~AudioOpus().

m_maxPacketSize

const int AudioOpus::m_maxPacketSize = 3*1276

static

Definition at line 38 of file audioopus.h.

Referenced by encode().

m_mutex

QMutex AudioOpus::m_mutex

private

Definition at line 43 of file audioopus.h.

Referenced by encode(), and setEncoder().

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

• sdrbase/audio/audioopus.h
• sdrbase/audio/audioopus.cpp