_state.audio_channels = d->audio_channels ();
_state.audio_sample_rate = d->audio_sample_rate ();
_state.audio_sample_format = d->audio_sample_format ();
_state.audio_channels = d->audio_channels ();
_state.audio_sample_rate = d->audio_sample_rate ();
_state.audio_sample_format = d->audio_sample_format ();