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#include "audio_content.h"
#include "audio_decoder.h"
#include "dcpomatic_log.h"
#include "resampler.h"
#include "resampler_manager.h"
#include <boost/foreach.hpp>
#include <vector>
using std::vector;
using std::shared_ptr;
using std::make_shared;
using namespace dcpomatic;
void
ResamplerManager::add (DCPTime start, DCPTime end, shared_ptr<AudioContent> content, shared_ptr<AudioDecoder> decoder)
{
_groups.push_back (Group(start, end, content, decoder));
coalesce ();
}
void
ResamplerManager::coalesce ()
{
if (_groups.size() < 2) {
return;
}
while (coalesce_pass()) {}
}
bool
ResamplerManager::can_share (Group const& a, Group const& b) const
{
auto as = a.contents[0]->streams();
auto bs = b.contents[0]->streams();
if (a.contents[0]->streams().size() != b.contents[0]->streams().size()) {
return false;
}
auto film = _film.lock ();
DCPOMATIC_ASSERT (film);
if (a.contents[0]->resampled_frame_rate(film) != b.contents[0]->resampled_frame_rate(film)) {
return false;
}
/* The first, second, etc. streams in a and b must be the same */
auto i = as.begin();
auto j = bs.begin();
while (i != as.end()) {
if (
(*i)->channels() != (*j)->channels() ||
(*i)->mapping().mapped_channels() != (*j)->mapping().mapped_channels() ||
(*i)->frame_rate() != (*j)->frame_rate()) {
return false;
}
++i;
++j;
}
return true;
}
bool
ResamplerManager::coalesce_pass ()
{
for (size_t i = 0; i < _groups.size(); ++i) {
for (size_t j = 0; j < _groups.size(); ++j) {
if (i == j) {
continue;
}
if (_groups[i].start == _groups[j].end && can_share(_groups[i], _groups[j])) {
copy (_groups[i].decoders.begin(), _groups[i].decoders.end(), back_inserter(_groups[j].decoders));
copy (_groups[i].contents.begin(), _groups[i].contents.end(), back_inserter(_groups[j].contents));
_groups[j].end = _groups[i].end;
_groups.erase (_groups.begin() + i);
return true;
}
}
}
return false;
}
shared_ptr<Resampler>
ResamplerManager::get (AudioDecoder* decoder, AudioStreamPtr stream, bool fast)
{
auto film = _film.lock();
DCPOMATIC_ASSERT (film);
for (auto& g: _groups) {
for (size_t i = 0; i < g.decoders.size(); ++i) {
if (g.decoders[i].get() == decoder) {
auto content_streams = g.contents[i]->streams();
auto index = find(content_streams.begin(), content_streams.end(), stream) - content_streams.begin();
DCPOMATIC_ASSERT (index < static_cast<ptrdiff_t>(content_streams.size()));
if (!g.resamplers[index] && stream->frame_rate() != g.contents[i]->resampled_frame_rate(film)) {
LOG_GENERAL (
"Creating new resampler from %1 to %2 with %3 channels",
stream->frame_rate(),
g.contents[i]->resampled_frame_rate(film),
stream->channels()
);
g.resamplers[index] = make_shared<Resampler>(stream->frame_rate(), g.contents[i]->resampled_frame_rate(film), stream->channels());
if (fast) {
g.resamplers[index]->set_fast ();
}
}
return g.resamplers[index];
}
}
}
DCPOMATIC_ASSERT (false);
return {};
}
void
ResamplerManager::flush (AudioDecoder* decoder)
{
for (auto& g: _groups) {
if (find(g.decoders.begin(), g.decoders.end(), [decoder](shared_ptr<Decoder> d) { return d->audio.get() == decoder; }) != g.decoders.end()) {
for (auto r: g.resamplers) {
auto ro = r->flush ();
/* XXX: err... which content do these samples belong to? Won't
* the player throw the samples away if they appear to come from the
* wrong place?
*/
}
}
}
}
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