Exemple #1
0
void AudioMixer::prepareMixForListeningNode(Node* node) {
    AvatarAudioRingBuffer* nodeRingBuffer = ((AudioMixerClientData*) node->getLinkedData())->getAvatarAudioRingBuffer();

    // zero out the client mix for this node
    memset(_clientSamples, 0, sizeof(_clientSamples));

    // loop through all other nodes that have sufficient audio to mix
    foreach (const SharedNodePointer& otherNode, NodeList::getInstance()->getNodeHash()) {
        if (otherNode->getLinkedData()) {

            AudioMixerClientData* otherNodeClientData = (AudioMixerClientData*) otherNode->getLinkedData();

            // enumerate the ARBs attached to the otherNode and add all that should be added to mix
            for (unsigned int i = 0; i < otherNodeClientData->getRingBuffers().size(); i++) {
                PositionalAudioRingBuffer* otherNodeBuffer = otherNodeClientData->getRingBuffers()[i];

                if ((*otherNode != *node
                     || otherNodeBuffer->shouldLoopbackForNode())
                    && otherNodeBuffer->willBeAddedToMix()) {
                    addBufferToMixForListeningNodeWithBuffer(otherNodeBuffer, nodeRingBuffer);
                }
            }
        }
    }
}
void AudioMixerClientData::pushBuffersAfterFrameSend() {

    QList<PositionalAudioRingBuffer*>::iterator i = _ringBuffers.begin();
    while (i != _ringBuffers.end()) {
        // this was a used buffer, push the output pointer forwards
        PositionalAudioRingBuffer* audioBuffer = *i;

        const int INJECTOR_CONSECUTIVE_NOT_MIXED_THRESHOLD = 100;

        if (audioBuffer->willBeAddedToMix()) {
            audioBuffer->shiftReadPosition(audioBuffer->getSamplesPerFrame());
            audioBuffer->setWillBeAddedToMix(false);
        } else if (audioBuffer->getType() == PositionalAudioRingBuffer::Injector
                   && audioBuffer->hasStarted() && audioBuffer->isStarved()
                   && audioBuffer->getConsecutiveNotMixedCount() > INJECTOR_CONSECUTIVE_NOT_MIXED_THRESHOLD) {
            // this is an empty audio buffer that has starved, safe to delete
            // also delete its sequence number stats
            QUuid streamIdentifier = ((InjectedAudioRingBuffer*)audioBuffer)->getStreamIdentifier();
            _incomingInjectedAudioSequenceNumberStatsMap.remove(streamIdentifier);
            delete audioBuffer;
            i = _ringBuffers.erase(i);
            continue;
        }
        i++;
    }
}
void AudioMixerClientData::pushBuffersAfterFrameSend() {
    for (unsigned int i = 0; i < _ringBuffers.size(); i++) {
        // this was a used buffer, push the output pointer forwards
        PositionalAudioRingBuffer* audioBuffer = _ringBuffers[i];

        if (audioBuffer->willBeAddedToMix()) {
            audioBuffer->shiftReadPosition(NETWORK_BUFFER_LENGTH_SAMPLES_PER_CHANNEL);

            audioBuffer->setWillBeAddedToMix(false);
        } else if (audioBuffer->getType() == PositionalAudioRingBuffer::Injector
                   && audioBuffer->hasStarted() && audioBuffer->isStarved()) {
            // this is an empty audio buffer that has starved, safe to delete
            delete audioBuffer;
            _ringBuffers.erase(_ringBuffers.begin() + i);
        }
    }
}