/*
- Copyright (C) 2016-2017 Carl Hetherington <cth@carlh.net>
+ Copyright (C) 2016-2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
*/
+
#include "audio_ring_buffers.h"
#include "dcpomatic_assert.h"
#include "exceptions.h"
-#include <boost/foreach.hpp>
+#include <iostream>
+
using std::min;
using std::cout;
-using boost::shared_ptr;
+using std::make_pair;
+using std::pair;
+using std::list;
+using std::shared_ptr;
+using boost::optional;
+using namespace dcpomatic;
+
AudioRingBuffers::AudioRingBuffers ()
- : _used_in_head (0)
{
}
+
+/** @param frame_rate Frame rate in use; this is only used to check timing consistency of the incoming data */
void
-AudioRingBuffers::put (shared_ptr<const AudioBuffers> data, DCPTime time)
+AudioRingBuffers::put (shared_ptr<const AudioBuffers> data, DCPTime time, int frame_rate)
{
boost::mutex::scoped_lock lm (_mutex);
- if (!_buffers.empty ()) {
- DCPOMATIC_ASSERT (_buffers.front()->channels() == data->channels());
+ if (!_buffers.empty()) {
+ DCPOMATIC_ASSERT (_buffers.front().first->channels() == data->channels());
+ DCPTime const end = (_buffers.back().second + DCPTime::from_frames(_buffers.back().first->frames(), frame_rate));
+ if (labs(end.get() - time.get()) > 1) {
+ cout << "bad put " << to_string(_buffers.back().second) << " " << _buffers.back().first->frames() << " " << to_string(time) << "\n";
+ }
+ DCPOMATIC_ASSERT (labs(end.get() - time.get()) < 2);
}
- _buffers.push_back (data);
- _latest = time;
+ _buffers.push_back(make_pair(data, time));
}
-void
+
+/** @return time of the returned data; if it's not set this indicates an underrun */
+optional<DCPTime>
AudioRingBuffers::get (float* out, int channels, int frames)
{
boost::mutex::scoped_lock lm (_mutex);
+ optional<DCPTime> time;
+
while (frames > 0) {
if (_buffers.empty ()) {
for (int i = 0; i < frames; ++i) {
*out++ = 0;
}
}
- cout << "audio underrun; missing " << frames << "!\n";
- return;
+ return time;
}
- shared_ptr<const AudioBuffers> front = _buffers.front ();
+ auto front = _buffers.front ();
+ if (!time) {
+ time = front.second + DCPTime::from_frames(_used_in_head, 48000);
+ }
- int const to_do = min (frames, front->frames() - _used_in_head);
- float** p = front->data();
- int const c = min (front->channels(), channels);
+ int const to_do = min (frames, front.first->frames() - _used_in_head);
+ float* const* p = front.first->data();
+ int const c = min (front.first->channels(), channels);
for (int i = 0; i < to_do; ++i) {
for (int j = 0; j < c; ++j) {
*out++ = p[j][i + _used_in_head];
_used_in_head += to_do;
frames -= to_do;
- if (_used_in_head == front->frames()) {
+ if (_used_in_head == front.first->frames()) {
_buffers.pop_front ();
_used_in_head = 0;
}
}
+
+ return time;
}
+
+optional<DCPTime>
+AudioRingBuffers::peek () const
+{
+ boost::mutex::scoped_lock lm (_mutex);
+ if (_buffers.empty()) {
+ return {};
+ }
+ return _buffers.front().second;
+}
+
+
void
AudioRingBuffers::clear ()
{
boost::mutex::scoped_lock lm (_mutex);
_buffers.clear ();
_used_in_head = 0;
- _latest = DCPTime ();
}
+
Frame
AudioRingBuffers::size () const
{
boost::mutex::scoped_lock lm (_mutex);
Frame s = 0;
- BOOST_FOREACH (shared_ptr<const AudioBuffers> i, _buffers) {
- s += i->frames ();
+ for (auto const& i: _buffers) {
+ s += i.first->frames();
}
return s - _used_in_head;
}