size_t
RingBufferPool::getData(AudioBuffer& buffer, const std::string& call_id)
{
std::lock_guard<std::recursive_mutex> lk(stateLock_);
const auto bindings = getReadBindings(call_id);
if (not bindings)
return 0;
// No mixing
if (bindings->size() == 1)
return (*bindings->cbegin())->get(buffer, call_id);
buffer.reset();
buffer.setFormat(internalAudioFormat_);
size_t size = 0;
AudioBuffer mixBuffer(buffer);
for (const auto& rbuf : *bindings) {
// XXX: is it normal to only return the last positive size?
size = rbuf->get(mixBuffer, call_id);
if (size > 0)
buffer.mix(mixBuffer);
}
return size;
}
void
AudioSender::process()
{
auto& mainBuffer = Manager::instance().getRingBufferPool();
auto mainBuffFormat = mainBuffer.getInternalAudioFormat();
// compute nb of byte to get corresponding to 1 audio frame
const std::size_t samplesToGet = std::chrono::duration_cast<std::chrono::seconds>(mainBuffFormat.sample_rate * secondsPerPacket_).count();
if (mainBuffer.availableForGet(id_) < samplesToGet) {
const auto wait_time = std::chrono::duration_cast<std::chrono::milliseconds>(secondsPerPacket_);
if (not mainBuffer.waitForDataAvailable(id_, samplesToGet, wait_time))
return;
}
// get data
micData_.setFormat(mainBuffFormat);
micData_.resize(samplesToGet);
const auto samples = mainBuffer.getData(micData_, id_);
if (samples != samplesToGet)
return;
// down/upmix as needed
auto accountAudioCodec = std::static_pointer_cast<AccountAudioCodecInfo>(args_.codec);
micData_.setChannelNum(accountAudioCodec->audioformat.nb_channels, true);
if (mainBuffFormat.sample_rate != accountAudioCodec->audioformat.sample_rate) {
if (not resampler_) {
RING_DBG("Creating audio resampler");
resampler_.reset(new Resampler(accountAudioCodec->audioformat));
}
resampledData_.setFormat(accountAudioCodec->audioformat);
resampledData_.resize(samplesToGet);
resampler_->resample(micData_, resampledData_);
Smartools::getInstance().setLocalAudioCodec(audioEncoder_->getEncoderName());
if (audioEncoder_->encode_audio(resampledData_) < 0)
RING_ERR("encoding failed");
} else {
if (audioEncoder_->encode_audio(micData_) < 0)
RING_ERR("encoding failed");
}
}
size_t
RingBufferPool::getAvailableData(AudioBuffer& buffer, const std::string& call_id)
{
std::lock_guard<std::recursive_mutex> lk(stateLock_);
auto bindings = getReadBindings(call_id);
if (not bindings)
return 0;
// No mixing
if (bindings->size() == 1) {
return (*bindings->cbegin())->get(buffer, call_id);
}
size_t availableSamples = std::numeric_limits<size_t>::max();
for (const auto& rbuf : *bindings)
availableSamples = std::min(availableSamples,
rbuf->availableForGet(call_id));
if (availableSamples == std::numeric_limits<size_t>::max())
return 0;
availableSamples = std::min(availableSamples, buffer.frames());
buffer.resize(availableSamples);
buffer.reset();
buffer.setFormat(internalAudioFormat_);
AudioBuffer mixBuffer(buffer);
for (const auto &rbuf : *bindings) {
if (rbuf->get(mixBuffer, call_id) > 0)
buffer.mix(mixBuffer);
}
return availableSamples;
}