itsmattkc
05eae1e28a
This system was kind of janky anyway. It makes more sense ultimately for the audio management classes to contain the file handle rather than the renderer.
144 lines
3.0 KiB
C++
144 lines
3.0 KiB
C++
/***
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Olive - Non-Linear Video Editor
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Copyright (C) 2019 Olive Team
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "outputdeviceproxy.h"
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#include "audiomanager.h"
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#include "bufferaverage.h"
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OLIVE_NAMESPACE_ENTER
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AudioOutputDeviceProxy::AudioOutputDeviceProxy()
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{
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}
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AudioOutputDeviceProxy::~AudioOutputDeviceProxy()
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{
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if (file_.isOpen()) {
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file_.close();
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}
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}
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void AudioOutputDeviceProxy::SetParameters(const AudioRenderingParams ¶ms)
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{
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params_ = params;
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}
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void AudioOutputDeviceProxy::SetDevice(const QString &filename, qint64 offset, int playback_speed)
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{
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if (file_.isOpen()) {
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file_.close();
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}
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file_.setFileName(filename);
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if (!file_.open(QFile::ReadOnly)) {
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qCritical() << "Failed to open" << filename << "for audio playback";
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return;
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}
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file_.seek(offset);
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playback_speed_ = playback_speed;
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if (qAbs(playback_speed_) != 1) {
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tempo_processor_.Open(params_, qAbs(playback_speed_));
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}
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}
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void AudioOutputDeviceProxy::close()
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{
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QIODevice::close();
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file_.close();
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if (tempo_processor_.IsOpen()) {
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tempo_processor_.Close();
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}
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}
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qint64 AudioOutputDeviceProxy::readData(char *data, qint64 maxlen)
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{
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if (file_.isOpen()) {
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qint64 read_count;
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if (tempo_processor_.IsOpen()) {
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while ((read_count = tempo_processor_.Pull(data, static_cast<int>(maxlen))) == 0) {
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int dev_read = static_cast<int>(ReverseAwareRead(data, maxlen));
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if (!dev_read) {
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break;
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}
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tempo_processor_.Push(data, dev_read);
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}
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} else {
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// If we aren't doing any tempo processing, simply passthrough the read signal
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read_count = ReverseAwareRead(data, maxlen);
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}
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return read_count;
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}
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return 0;
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}
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qint64 AudioOutputDeviceProxy::writeData(const char *data, qint64 maxSize)
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{
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Q_UNUSED(data)
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Q_UNUSED(maxSize)
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return 0;
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}
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qint64 AudioOutputDeviceProxy::ReverseAwareRead(char *data, qint64 maxlen)
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{
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qint64 new_pos = -1;
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if (playback_speed_ < 0) {
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// If we're reversing, we'll seek back by maxlen bytes before we read
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new_pos = file_.pos() - maxlen;
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if (new_pos < 0) {
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maxlen = file_.pos();
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new_pos = 0;
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}
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file_.seek(new_pos);
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}
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qint64 read_count = file_.read(data, maxlen);
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if (playback_speed_ < 0) {
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file_.seek(new_pos);
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// Reverse the samples here
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AudioManager::ReverseBuffer(data, static_cast<int>(read_count), params_.samples_to_bytes(1));
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}
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return read_count;
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}
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OLIVE_NAMESPACE_EXIT
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