//
// N is reduced as follows: If the queue has had at least one spare frame for
// at least 50 (master) frames (ie., it's been too conservative for a second),
-// we reduce N by 1 and reset the timers.
+// we reduce N by 1 and reset the timers. TODO: Only do this if N ever actually
+// touched the limit.
//
-// Whenever the queue is starved (we needed a frame but there was none), N was
-// obviously too low, so we increment N. We will never set N above 5, though.
+// Whenever the queue is starved (we needed a frame but there was none),
+// and we've been at N since the last starvation, N was obviously too low,
+// so we increment it. We will never set N above 5, though.
class QueueLengthPolicy {
public:
QueueLengthPolicy() {}
this->card_index = card_index;
safe_queue_length = 0;
frames_with_at_least_one = 0;
+ been_at_safe_point_since_last_starvation = false;
}
void update_policy(int queue_length); // Give in -1 for starvation.
unsigned card_index; // For debugging only.
unsigned safe_queue_length = 0; // Called N in the comments.
unsigned frames_with_at_least_one = 0;
+ bool been_at_safe_point_since_last_starvation = false;
};
class Mixer {
return theme->get_channel_name(channel);
}
+ std::string get_channel_color(unsigned channel) const
+ {
+ return theme->get_channel_color(channel);
+ }
+
int get_channel_signal(unsigned channel) const
{
return theme->get_channel_signal(channel);
audio_source_channel = channel;
}
+ unsigned get_master_clock() const
+ {
+ return master_clock_channel;
+ }
+
+ void set_master_clock(unsigned channel)
+ {
+ master_clock_channel = channel;
+ }
+
void set_signal_mapping(int signal, int card)
{
return theme->set_signal_mapping(signal, card);
std::unique_ptr<movit::ResourcePool> resource_pool;
std::unique_ptr<Theme> theme;
std::atomic<unsigned> audio_source_channel{0};
+ std::atomic<unsigned> master_clock_channel{0};
std::unique_ptr<movit::EffectChain> display_chain;
GLuint cbcr_program_num; // Owned by <resource_pool>.
GLuint cbcr_vbo; // Holds position and texcoord data.
int64_t length; // In TIMEBASE units.
bool interlaced;
unsigned field; // Which field (0 or 1) of the frame to use. Always 0 for progressive.
- GLsync ready_fence; // Whether frame is ready for rendering.
+ RefCountedGLsync ready_fence; // Whether frame is ready for rendering.
unsigned dropped_frames = 0; // Number of dropped frames before this one.
};
std::queue<NewFrame> new_frames;