Mike-Solar
a7ddc0f114
- playback timer uses the audio output device as its master clock: the PortAudio callback counts consumed frames (including underrun zero-fill) so video cannot drift away from what is heard; wall clock remains as fallback when no clocked output is running - output clock compensates for device output latency; new Preferences > Audio buffer size setting (0 = auto) - SampleBuffer::speed() now uses linear interpolation instead of nearest-neighbor sampling - regression tests: audio-clock driven timer (fwd/rev/speed), wall clock fallback, interpolation correctness
112 lines
2.4 KiB
C++
112 lines
2.4 KiB
C++
/***
|
|
|
|
Olive - Non-Linear Video Editor
|
|
Copyright (C) 2022 Olive Team
|
|
Modifications Copyright (C) 2025 mikesolar
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
***/
|
|
|
|
#ifndef OAK_PREVIEWAUDIODEVICE_H
|
|
#define OAK_PREVIEWAUDIODEVICE_H
|
|
|
|
#include <olive/core/render/audioparams.h>
|
|
|
|
#include <atomic>
|
|
|
|
#include "previewautocacher.h"
|
|
|
|
namespace olive
|
|
{
|
|
|
|
class PreviewAudioDevice : public QIODevice {
|
|
Q_OBJECT
|
|
public:
|
|
PreviewAudioDevice(QObject *parent = nullptr);
|
|
|
|
virtual ~PreviewAudioDevice() override;
|
|
|
|
void start_queuing();
|
|
|
|
virtual bool isSequential() const override;
|
|
|
|
virtual qint64 readData(char *data, qint64 max_size) override;
|
|
|
|
virtual qint64 writeData(const char *data, qint64 length) override;
|
|
|
|
// Derives the frame size from the audio format (bytes per sample per
|
|
// channel * channel count). Until params are set, bytes_per_frame()
|
|
// reports 0, i.e. "unknown".
|
|
void set_params(const core::AudioParams ¶ms);
|
|
|
|
int bytes_per_frame() const
|
|
{
|
|
return bytes_per_frame_;
|
|
}
|
|
|
|
void set_bytes_per_frame(int b)
|
|
{
|
|
bytes_per_frame_ = b;
|
|
}
|
|
|
|
void set_notify_interval(qint64 i)
|
|
{
|
|
notify_interval_ = i;
|
|
}
|
|
|
|
void clear();
|
|
|
|
/**
|
|
* @brief Frames consumed by the audio output callback
|
|
*
|
|
* Counted in the callback itself so underrun (zero-filled) frames are
|
|
* included, making the value usable as a playback clock.
|
|
*/
|
|
void add_output_frames(qint64 frame_count)
|
|
{
|
|
output_frames_consumed_.fetch_add(frame_count);
|
|
}
|
|
|
|
qint64 output_frames_consumed() const
|
|
{
|
|
return output_frames_consumed_.load();
|
|
}
|
|
|
|
void reset_output_frames()
|
|
{
|
|
output_frames_consumed_.store(0);
|
|
}
|
|
|
|
signals:
|
|
void notify();
|
|
|
|
private:
|
|
QMutex lock_;
|
|
|
|
QByteArray buffer_;
|
|
|
|
int bytes_per_frame_;
|
|
|
|
qint64 notify_interval_;
|
|
|
|
qint64 bytes_read_;
|
|
|
|
std::atomic<qint64> output_frames_consumed_{0};
|
|
};
|
|
|
|
}
|
|
|
|
#endif // OAK_PREVIEWAUDIODEVICE_H
|