size_t last_used;
};
+struct PendingDecode {
+ JPEGID primary, secondary;
+ float fade_alpha; // Irrelevant if secondary.stream_idx == -1.
+ JPEGFrameView *destination;
+};
+
thread JPEGFrameView::jpeg_decoder_thread;
mutex cache_mu;
map<JPEGID, LRUFrame, JPEGIDLexicalOrder> cache; // Under cache_mu.
condition_variable any_pending_decodes, cache_updated;
-deque<pair<JPEGID, JPEGFrameView *>> pending_decodes; // Under cache_mu.
+deque<PendingDecode> pending_decodes; // Under cache_mu.
atomic<size_t> event_counter{0};
extern QGLWidget *global_share_widget;
extern atomic<bool> should_quit;
pthread_setname_np(pthread_self(), "JPEGDecoder");
while (!should_quit.load()) {
- JPEGID id;
- JPEGFrameView *dest;
+ PendingDecode decode;
CacheMissBehavior cache_miss_behavior = DECODE_IF_NOT_IN_CACHE;
{
unique_lock<mutex> lock(cache_mu); // TODO: Perhaps under another lock?
return !pending_decodes.empty() || should_quit.load();
});
if (should_quit.load()) break;
- id = pending_decodes.front().first;
- dest = pending_decodes.front().second;
+ decode = pending_decodes.front();
pending_decodes.pop_front();
size_t num_pending = 0;
- for (const pair<JPEGID, JPEGFrameView *> &decode : pending_decodes) {
- if (decode.second == dest) {
+ for (const PendingDecode &other_decode : pending_decodes) {
+ if (other_decode.destination == decode.destination) {
++num_pending;
}
}
}
}
- bool found_in_cache;
- shared_ptr<Frame> frame;
- if (id.interpolated) {
- // Interpolated frames are never decoded by us,
- // put directly into the cache from VideoStream.
- unique_lock<mutex> lock(cache_mu);
- cache_updated.wait(lock, [id] {
- return cache.count(id) != 0 || should_quit.load();
- });
- if (should_quit.load()) break;
- found_in_cache = true; // Don't count it as a decode.
+ shared_ptr<Frame> primary_frame, secondary_frame;
+ bool drop = false;
+ for (int subframe_idx = 0; subframe_idx < 2; ++subframe_idx) {
+ const JPEGID &id = (subframe_idx == 0 ? decode.primary : decode.secondary);
+ if (id.stream_idx == (unsigned)-1) {
+ // No secondary frame.
+ continue;
+ }
- auto it = cache.find(id);
- assert(it != cache.end());
+ bool found_in_cache;
+ shared_ptr<Frame> frame;
+ if (id.interpolated) {
+ // Interpolated frames are never decoded by us,
+ // put directly into the cache from VideoStream.
+ unique_lock<mutex> lock(cache_mu);
+ cache_updated.wait(lock, [id] {
+ return cache.count(id) != 0 || should_quit.load();
+ });
+ if (should_quit.load()) break;
+ found_in_cache = true; // Don't count it as a decode.
+
+ auto it = cache.find(id);
+ assert(it != cache.end());
+
+ it->second.last_used = event_counter++;
+ frame = it->second.frame;
+ if (frame == nullptr) {
+ // We inserted a nullptr as signal that the frame was never
+ // interpolated and that we should stop waiting.
+ // But don't let it linger in the cache anymore.
+ cache.erase(it);
+ }
+ } else {
+ frame = decode_jpeg_with_cache(id, cache_miss_behavior, &found_in_cache);
+ }
- it->second.last_used = event_counter++;
- frame = it->second.frame;
if (frame == nullptr) {
- // We inserted a nullptr as signal that the frame was never
- // interpolated and that we should stop waiting.
- // But don't let it linger in the cache anymore.
- cache.erase(it);
+ assert(id.interpolated || cache_miss_behavior == RETURN_NULLPTR_IF_NOT_IN_CACHE);
+ drop = true;
+ break;
}
- } else {
- frame = decode_jpeg_with_cache(id, cache_miss_behavior, &found_in_cache);
- }
- if (frame == nullptr) {
- assert(id.interpolated || cache_miss_behavior == RETURN_NULLPTR_IF_NOT_IN_CACHE);
+ if (!found_in_cache) {
+ ++num_decoded;
+ if (num_decoded % 1000 == 0) {
+ fprintf(stderr, "Decoded %zu images, dropped %zu (%.2f%% dropped)\n",
+ num_decoded, num_dropped, (100.0 * num_dropped) / (num_decoded + num_dropped));
+ }
+ }
+ if (subframe_idx == 0) {
+ primary_frame = move(frame);
+ } else {
+ secondary_frame = move(frame);
+ }
+ }
+ if (drop) {
++num_dropped;
continue;
}
- if (!found_in_cache) {
- ++num_decoded;
- if (num_decoded % 1000 == 0) {
- fprintf(stderr, "Decoded %zu images, dropped %zu (%.2f%% dropped)\n",
- num_decoded, num_dropped, (100.0 * num_dropped) / (num_decoded + num_dropped));
- }
- }
-
// TODO: Could we get jitter between non-interpolated and interpolated frames here?
- dest->setDecodedFrame(frame);
+ decode.destination->setDecodedFrame(primary_frame, secondary_frame, decode.fade_alpha);
}
}
: QGLWidget(parent, global_share_widget) {
}
-void JPEGFrameView::setFrame(unsigned stream_idx, int64_t pts, bool interpolated)
+void JPEGFrameView::setFrame(unsigned stream_idx, int64_t pts, bool interpolated, int secondary_stream_idx, int64_t secondary_pts, float fade_alpha)
{
- current_stream_idx = stream_idx;
+ current_stream_idx = stream_idx; // TODO: Does this interact with fades?
unique_lock<mutex> lock(cache_mu);
- pending_decodes.emplace_back(JPEGID{ stream_idx, pts, interpolated }, this);
+ PendingDecode decode;
+ decode.primary = JPEGID{ stream_idx, pts, interpolated };
+ decode.secondary = JPEGID{ (unsigned)secondary_stream_idx, secondary_pts, /*interpolated=*/false };
+ decode.fade_alpha = fade_alpha;
+ decode.destination = this;
+ pending_decodes.push_back(decode);
any_pending_decodes.notify_all();
}
}
}
-void JPEGFrameView::setDecodedFrame(std::shared_ptr<Frame> frame)
+namespace {
+
+
+} // namespace
+
+void JPEGFrameView::setDecodedFrame(shared_ptr<Frame> frame, shared_ptr<Frame> secondary_frame, float fade_alpha)
{
- post_to_main_thread([this, frame] {
+ post_to_main_thread([this, frame, secondary_frame, fade_alpha] {
current_frame = frame;
- current_chain = ycbcr_converter->prepare_chain_for_conversion(frame);
+ current_secondary_frame = secondary_frame;
+
+ if (secondary_frame != nullptr) {
+ current_chain = ycbcr_converter->prepare_chain_for_fade(frame, secondary_frame, fade_alpha);
+ } else {
+ current_chain = ycbcr_converter->prepare_chain_for_conversion(frame);
+ }
update();
});
}
projects / nageru / blobdiff