using std::min;
using boost::shared_ptr;
-/** @param channels Number of channels of audio.
- * @param frames Delay in frames, +ve to move audio later.
+/* @param seconds Delay in seconds, +ve to move audio later.
*/
-DelayLine::DelayLine (Log* log, int channels, int frames)
- : AudioProcessor (log)
- , _negative_delay_remaining (0)
- , _frames (frames)
+DelayLine::DelayLine (shared_ptr<Log> log, double seconds)
+ : TimedAudioVideoProcessor (log)
+ , _seconds (seconds)
{
- if (_frames > 0) {
- /* We need a buffer to keep some data in */
- _buffers.reset (new AudioBuffers (channels, _frames));
- _buffers->make_silent ();
- } else if (_frames < 0) {
- /* We can do -ve delays just by chopping off
- the start, so no buffer needed.
- */
- _negative_delay_remaining = -_frames;
- }
+
}
void
-DelayLine::process_audio (shared_ptr<AudioBuffers> data)
+DelayLine::process_audio (shared_ptr<const AudioBuffers> data, double t)
{
- if (_buffers) {
- /* We have some buffers, so we are moving the audio later */
-
- /* Copy the input data */
- AudioBuffers input (*data.get ());
-
- int to_do = data->frames ();
-
- /* Write some of our buffer to the output */
- int const from_buffer = min (to_do, _buffers->frames());
- data->copy_from (_buffers.get(), from_buffer, 0, 0);
- to_do -= from_buffer;
-
- /* Write some of the input to the output */
- int const from_input = to_do;
- data->copy_from (&input, from_input, 0, from_buffer);
-
- int const left_in_buffer = _buffers->frames() - from_buffer;
-
- /* Shuffle our buffer down */
- _buffers->move (from_buffer, 0, left_in_buffer);
-
- /* Copy remaining input data to our buffer */
- _buffers->copy_from (&input, input.frames() - from_input, from_input, left_in_buffer);
-
- } else {
+ if (_seconds > 0) {
+ t += _seconds;
+ }
- /* Chop the initial data off until _negative_delay_remaining
- is zero, then just pass data.
- */
+ Audio (data, t);
+}
- int const to_do = min (data->frames(), _negative_delay_remaining);
- if (to_do) {
- data->move (to_do, 0, data->frames() - to_do);
- data->set_frames (data->frames() - to_do);
- _negative_delay_remaining -= to_do;
- }
+void
+DelayLine::process_video (shared_ptr<const Image> image, bool same, boost::shared_ptr<Subtitle> sub, double t)
+{
+ if (_seconds < 0) {
+ t += _seconds;
}
- Audio (data);
+ Video (image, same, sub, t);
}