120 lines
2.3 KiB
C++
120 lines
2.3 KiB
C++
#include "outputdeviceproxy.h"
|
|
|
|
#include "audiomanager.h"
|
|
#include "bufferaverage.h"
|
|
|
|
AudioOutputDeviceProxy::AudioOutputDeviceProxy() :
|
|
device_(nullptr),
|
|
send_averages_(false)
|
|
{
|
|
}
|
|
|
|
void AudioOutputDeviceProxy::SetParameters(const AudioRenderingParams ¶ms)
|
|
{
|
|
params_ = params;
|
|
}
|
|
|
|
void AudioOutputDeviceProxy::SetDevice(QIODevice *device, int playback_speed)
|
|
{
|
|
device_ = device;
|
|
|
|
if (!device_->isOpen()) {
|
|
device_->open(QIODevice::ReadOnly);
|
|
}
|
|
|
|
playback_speed_ = playback_speed;
|
|
|
|
if (qAbs(playback_speed_) != 1) {
|
|
tempo_processor_.Open(params_, qAbs(playback_speed_));
|
|
}
|
|
}
|
|
|
|
void AudioOutputDeviceProxy::SetSendAverages(bool send)
|
|
{
|
|
send_averages_ = send;
|
|
}
|
|
|
|
void AudioOutputDeviceProxy::close()
|
|
{
|
|
QIODevice::close();
|
|
|
|
device_->close();
|
|
|
|
if (tempo_processor_.IsOpen()) {
|
|
tempo_processor_.Close();
|
|
}
|
|
}
|
|
|
|
qint64 AudioOutputDeviceProxy::readData(char *data, qint64 maxlen)
|
|
{
|
|
if (device_) {
|
|
|
|
qint64 read_count;
|
|
|
|
|
|
|
|
if (tempo_processor_.IsOpen()) {
|
|
|
|
while ((read_count = tempo_processor_.Pull(data, static_cast<int>(maxlen))) == 0) {
|
|
int dev_read = static_cast<int>(ReverseAwareRead(data, maxlen));
|
|
|
|
if (!dev_read) {
|
|
break;
|
|
}
|
|
|
|
tempo_processor_.Push(data, dev_read);
|
|
}
|
|
|
|
} else {
|
|
// If we aren't doing any tempo processing, simply passthrough the read signal
|
|
read_count = ReverseAwareRead(data, maxlen);
|
|
}
|
|
|
|
// If we read any
|
|
if (read_count > 0 && send_averages_) {
|
|
emit ProcessedAverages(AudioBufferAverage::ProcessAverages(data, static_cast<int>(read_count)));
|
|
}
|
|
|
|
return read_count;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
qint64 AudioOutputDeviceProxy::writeData(const char *data, qint64 maxSize)
|
|
{
|
|
Q_UNUSED(data)
|
|
Q_UNUSED(maxSize)
|
|
|
|
return -1;
|
|
}
|
|
|
|
qint64 AudioOutputDeviceProxy::ReverseAwareRead(char *data, qint64 maxlen)
|
|
{
|
|
qint64 new_pos = -1;
|
|
|
|
if (playback_speed_ < 0) {
|
|
// If we're reversing, we'll seek back by maxlen bytes before we read
|
|
new_pos = device_->pos() - maxlen;
|
|
|
|
if (new_pos < 0) {
|
|
maxlen = device_->pos();
|
|
|
|
new_pos = 0;
|
|
}
|
|
|
|
device_->seek(new_pos);
|
|
}
|
|
|
|
qint64 read_count = device_->read(data, maxlen);
|
|
|
|
if (playback_speed_ < 0) {
|
|
device_->seek(new_pos);
|
|
|
|
// Reverse the samples here
|
|
AudioManager::ReverseBuffer(data, static_cast<int>(read_count), params_.samples_to_bytes(1));
|
|
}
|
|
|
|
return read_count;
|
|
}
|