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/***
Olive - Non-Linear Video Editor
Copyright (C) 2019 Olive Team
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/>.
***/
#include "audioparams.h"
extern "C" {
#include <libavformat/avformat.h>
}
OLIVE_NAMESPACE_ENTER
int AudioParams::time_to_bytes(const double &time) const
{
Q_ASSERT(is_valid());
return time_to_samples(time) * channel_count() * bytes_per_sample_per_channel();
}
bool AudioParams::operator==(const AudioParams &other) const
{
return (format() == other.format()
&& sample_rate() == other.sample_rate()
&& channel_layout() == other.channel_layout());
}
bool AudioParams::operator!=(const AudioParams &other) const
{
return !(*this == other);
}
int AudioParams::time_to_bytes(const rational &time) const
{
return time_to_bytes(time.toDouble());
}
int AudioParams::time_to_samples(const double &time) const
{
Q_ASSERT(is_valid());
return qFloor(time * sample_rate());
}
int AudioParams::time_to_samples(const rational &time) const
{
return time_to_samples(time.toDouble());
}
int AudioParams::samples_to_bytes(const int &samples) const
{
Q_ASSERT(is_valid());
return samples * channel_count() * bytes_per_sample_per_channel();
}
rational AudioParams::samples_to_time(const int &samples) const
{
return rational(samples, sample_rate());
}
int AudioParams::bytes_to_samples(const int &bytes) const
{
Q_ASSERT(is_valid());
return bytes / (channel_count() * bytes_per_sample_per_channel());
}
rational AudioParams::bytes_to_time(const int &bytes) const
{
Q_ASSERT(is_valid());
return samples_to_time(bytes_to_samples(bytes));
}
int AudioParams::channel_count() const
{
return av_get_channel_layout_nb_channels(channel_layout());
}
int AudioParams::bytes_per_sample_per_channel() const
{
switch (format_) {
case SampleFormat::SAMPLE_FMT_U8:
return 1;
case SampleFormat::SAMPLE_FMT_S16:
return 2;
case SampleFormat::SAMPLE_FMT_S32:
case SampleFormat::SAMPLE_FMT_FLT:
return 4;
case SampleFormat::SAMPLE_FMT_DBL:
case SampleFormat::SAMPLE_FMT_S64:
return 8;
case SampleFormat::SAMPLE_FMT_INVALID:
case SampleFormat::SAMPLE_FMT_COUNT:
break;
}
return 0;
}
int AudioParams::bits_per_sample() const
{
return bytes_per_sample_per_channel() * 8;
}
bool AudioParams::is_valid() const
{
return (sample_rate() > 0
&& channel_layout() > 0
&& format_ != SampleFormat::SAMPLE_FMT_INVALID
&& format_ != SampleFormat::SAMPLE_FMT_COUNT);
}
OLIVE_NAMESPACE_EXIT
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