AudioDecoder::AudioDecoder (shared_ptr<const AudioContent> content)
: _audio_content (content)
{
- if (content->output_audio_frame_rate() != content->content_audio_frame_rate() && content->audio_channels ()) {
- _resampler.reset (new Resampler (content->content_audio_frame_rate(), content->output_audio_frame_rate(), content->audio_channels ()));
+ if (content->resampled_audio_frame_rate() != content->audio_frame_rate() && content->audio_channels ()) {
+ _resampler.reset (new Resampler (content->audio_frame_rate(), content->resampled_audio_frame_rate(), content->audio_channels ()));
}
reset_decoded_audio ();
if (frame < _decoded_audio.frame || end > (_decoded_audio.frame + length * 4)) {
/* Either we have no decoded data, or what we do have is a long way from what we want: seek */
- seek (ContentTime::from_frames (frame, _audio_content->content_audio_frame_rate()), accurate);
+ seek (ContentTime::from_frames (frame, _audio_content->audio_frame_rate()), accurate);
}
/* Offset of the data that we want from the start of _decoded_audio.audio
}
/* The amount of data available in _decoded_audio.audio starting from `frame'. This could be -ve
- if pass() returned true before we got enough data
+ if pass() returned true before we got enough data.
*/
- AudioFrame const amount_left = _decoded_audio.audio->frames() - decoded_offset;
-
+ AudioFrame const available = _decoded_audio.audio->frames() - decoded_offset;
+
/* We will return either that, or the requested amount, whichever is smaller */
- AudioFrame const to_return = max ((AudioFrame) 0, min (amount_left, length));
+ AudioFrame const to_return = max ((AudioFrame) 0, min (available, length));
/* Copy our data to the output */
shared_ptr<AudioBuffers> out (new AudioBuffers (_decoded_audio.audio->channels(), to_return));
out->copy_from (_decoded_audio.audio.get(), to_return, decoded_offset, 0);
-
+
+ AudioFrame const remaining = max ((AudioFrame) 0, available - to_return);
+
/* Clean up decoded; first, move the data after what we just returned to the start of the buffer */
- _decoded_audio.audio->move (decoded_offset + to_return, 0, amount_left - to_return);
+ _decoded_audio.audio->move (decoded_offset + to_return, 0, remaining);
/* And set up the number of frames we have left */
- _decoded_audio.audio->set_frames (amount_left - to_return);
+ _decoded_audio.audio->set_frames (remaining);
/* Also bump where those frames are in terms of the content */
_decoded_audio.frame += decoded_offset + to_return;
}
if (!_audio_position) {
- _audio_position = time.frames (_audio_content->output_audio_frame_rate ());
+ _audio_position = time.frames (_audio_content->resampled_audio_frame_rate ());
}
assert (_audio_position.get() >= (_decoded_audio.frame + _decoded_audio.audio->frames()));