#include <thread>
#include <vector>
+#include <movit/effect.h>
#include <movit/image_format.h>
#include "audio_mixer.h"
#include "bmusb/bmusb.h"
#include "defs.h"
+#include "ffmpeg_capture.h"
#include "shared/httpd.h"
#include "input_state.h"
#include "libusb.h"
#include "pbo_frame_allocator.h"
+#include "queue_length_policy.h"
#include "ref_counted_frame.h"
#include "shared/ref_counted_gl_sync.h"
#include "theme.h"
class YCbCrInput;
} // namespace movit
-// A class to estimate the future jitter. Used in QueueLengthPolicy (see below).
-//
-// There are many ways to estimate jitter; I've tested a few ones (and also
-// some algorithms that don't explicitly model jitter) with different
-// parameters on some real-life data in experiments/queue_drop_policy.cpp.
-// This is one based on simple order statistics where I've added some margin in
-// the number of starvation events; I believe that about one every hour would
-// probably be acceptable, but this one typically goes lower than that, at the
-// cost of 2–3 ms extra latency. (If the queue is hard-limited to one frame, it's
-// possible to get ~10 ms further down, but this would mean framedrops every
-// second or so.) The general strategy is: Take the 99.9-percentile jitter over
-// last 5000 frames, multiply by two, and that's our worst-case jitter
-// estimate. The fact that we're not using the max value means that we could
-// actually even throw away very late frames immediately, which means we only
-// get one user-visible event instead of seeing something both when the frame
-// arrives late (duplicate frame) and then again when we drop.
-class JitterHistory {
-private:
- static constexpr size_t history_length = 5000;
- static constexpr double percentile = 0.999;
- static constexpr double multiplier = 2.0;
-
-public:
- void register_metrics(const std::vector<std::pair<std::string, std::string>> &labels);
- void unregister_metrics(const std::vector<std::pair<std::string, std::string>> &labels);
-
- void clear() {
- history.clear();
- orders.clear();
- }
- void frame_arrived(std::chrono::steady_clock::time_point now, int64_t frame_duration, size_t dropped_frames);
- std::chrono::steady_clock::time_point get_expected_next_frame() const { return expected_timestamp; }
- double estimate_max_jitter() const;
-
-private:
- // A simple O(k) based algorithm for getting the k-th largest or
- // smallest element from our window; we simply keep the multiset
- // ordered (insertions and deletions are O(n) as always) and then
- // iterate from one of the sides. If we had larger values of k,
- // we could go for a more complicated setup with two sets or heaps
- // (one increasing and one decreasing) that we keep balanced around
- // the point, or it is possible to reimplement std::set with
- // counts in each node. However, since k=5, we don't need this.
- std::multiset<double> orders;
- std::deque<std::multiset<double>::iterator> history;
-
- std::chrono::steady_clock::time_point expected_timestamp = std::chrono::steady_clock::time_point::min();
-
- // Metrics. There are no direct summaries for jitter, since we already have latency summaries.
- std::atomic<int64_t> metric_input_underestimated_jitter_frames{0};
- std::atomic<double> metric_input_estimated_max_jitter_seconds{0.0 / 0.0};
-};
-
-// For any card that's not the master (where we pick out the frames as they
-// come, as fast as we can process), there's going to be a queue. The question
-// is when we should drop frames from that queue (apart from the obvious
-// dropping if the 16-frame queue should become full), especially given that
-// the frame rate could be lower or higher than the master (either subtly or
-// dramatically). We have two (conflicting) demands:
-//
-// 1. We want to avoid starving the queue.
-// 2. We don't want to add more delay than is needed.
-//
-// Our general strategy is to drop as many frames as we can (helping for #2)
-// that we think is safe for #1 given jitter. To this end, we measure the
-// deviation from the expected arrival time for all cards, and use that for
-// continuous jitter estimation.
-//
-// We then drop everything from the queue that we're sure we won't need to
-// serve the output in the time before the next frame arrives. Typically,
-// this means the queue will contain 0 or 1 frames, although more is also
-// possible if the jitter is very high.
-class QueueLengthPolicy {
-public:
- QueueLengthPolicy() {}
- void reset(unsigned card_index) {
- this->card_index = card_index;
- }
-
- void register_metrics(const std::vector<std::pair<std::string, std::string>> &labels);
- void unregister_metrics(const std::vector<std::pair<std::string, std::string>> &labels);
-
- // Call after picking out a frame, so 0 means starvation.
- void update_policy(std::chrono::steady_clock::time_point now,
- std::chrono::steady_clock::time_point expected_next_frame,
- int64_t input_frame_duration,
- int64_t master_frame_duration,
- double max_input_card_jitter_seconds,
- double max_master_card_jitter_seconds);
- unsigned get_safe_queue_length() const { return safe_queue_length; }
-
-private:
- unsigned card_index; // For debugging and metrics only.
- unsigned safe_queue_length = 0; // Can never go below zero.
-
- // Metrics.
- std::atomic<int64_t> metric_input_queue_safe_length_frames{1};
-};
-
class Mixer {
public:
// The surface format is used for offscreen destinations for OpenGL contexts we need.
- Mixer(const QSurfaceFormat &format, unsigned num_cards);
+ Mixer(const QSurfaceFormat &format);
~Mixer();
void start();
void quit();
return theme->get_channel_color(channel);
}
- int get_channel_signal(unsigned channel) const
+ int map_channel_to_signal(unsigned channel) const
{
- return theme->get_channel_signal(channel);
+ return theme->map_channel_to_signal(channel);
}
- int map_signal(unsigned channel)
+ int map_signal_to_card(int signal)
{
- return theme->map_signal(channel);
+ return theme->map_signal_to_card(signal);
}
unsigned get_master_clock() const
theme->set_wb(channel, r, g, b);
}
+ std::string format_status_line(const std::string &disk_space_left_text, double file_length_seconds)
+ {
+ return theme->format_status_line(disk_space_left_text, file_length_seconds);
+ }
+
// Note: You can also get this through the global variable global_audio_mixer.
AudioMixer *get_audio_mixer() { return audio_mixer.get(); }
const AudioMixer *get_audio_mixer() const { return audio_mixer.get(); }
should_cut = true;
}
- unsigned get_num_cards() const { return num_cards; }
-
std::string get_card_description(unsigned card_index) const {
- assert(card_index < num_cards);
+ assert(card_index < MAX_VIDEO_CARDS);
return cards[card_index].capture->get_description();
}
// the card's actual name.
std::string get_output_card_description(unsigned card_index) const {
assert(card_can_be_used_as_output(card_index));
- assert(card_index < num_cards);
+ assert(card_index < MAX_VIDEO_CARDS);
if (cards[card_index].parked_capture) {
return cards[card_index].parked_capture->get_description();
} else {
}
bool card_can_be_used_as_output(unsigned card_index) const {
- assert(card_index < num_cards);
- return cards[card_index].output != nullptr;
+ assert(card_index < MAX_VIDEO_CARDS);
+ return cards[card_index].output != nullptr && cards[card_index].capture != nullptr;
+ }
+
+ bool card_is_cef(unsigned card_index) const {
+ assert(card_index < MAX_VIDEO_CARDS);
+ return cards[card_index].type == CardType::CEF_INPUT;
}
bool card_is_ffmpeg(unsigned card_index) const {
- assert(card_index < num_cards + num_video_inputs);
- return cards[card_index].type == CardType::FFMPEG_INPUT;
+ assert(card_index < MAX_VIDEO_CARDS);
+ if (cards[card_index].type != CardType::FFMPEG_INPUT) {
+ return false;
+ }
+#ifdef HAVE_SRT
+ // SRT inputs are more like regular inputs than FFmpeg inputs,
+ // so show them as such. (This allows the user to right-click
+ // to select a different input.)
+ return static_cast<FFmpegCapture *>(cards[card_index].capture.get())->get_srt_sock() == -1;
+#else
+ return true;
+#endif
+ }
+
+ bool card_is_active(unsigned card_index) const {
+ assert(card_index < MAX_VIDEO_CARDS);
+ std::lock_guard<std::mutex> lock(card_mutex);
+ return cards[card_index].capture != nullptr;
+ }
+
+ void force_card_active(unsigned card_index)
+ {
+ // handle_hotplugged_cards() will pick this up.
+ std::lock_guard<std::mutex> lock(card_mutex);
+ cards[card_index].force_active = true;
}
std::map<uint32_t, bmusb::VideoMode> get_available_video_modes(unsigned card_index) const {
- assert(card_index < num_cards);
+ assert(card_index < MAX_VIDEO_CARDS);
return cards[card_index].capture->get_available_video_modes();
}
uint32_t get_current_video_mode(unsigned card_index) const {
- assert(card_index < num_cards);
+ assert(card_index < MAX_VIDEO_CARDS);
return cards[card_index].capture->get_current_video_mode();
}
void set_video_mode(unsigned card_index, uint32_t mode) {
- assert(card_index < num_cards);
+ assert(card_index < MAX_VIDEO_CARDS);
cards[card_index].capture->set_video_mode(mode);
}
void start_mode_scanning(unsigned card_index);
std::map<uint32_t, std::string> get_available_video_inputs(unsigned card_index) const {
- assert(card_index < num_cards);
+ assert(card_index < MAX_VIDEO_CARDS);
return cards[card_index].capture->get_available_video_inputs();
}
uint32_t get_current_video_input(unsigned card_index) const {
- assert(card_index < num_cards);
+ assert(card_index < MAX_VIDEO_CARDS);
return cards[card_index].capture->get_current_video_input();
}
void set_video_input(unsigned card_index, uint32_t input) {
- assert(card_index < num_cards);
+ assert(card_index < MAX_VIDEO_CARDS);
cards[card_index].capture->set_video_input(input);
}
std::map<uint32_t, std::string> get_available_audio_inputs(unsigned card_index) const {
- assert(card_index < num_cards);
+ assert(card_index < MAX_VIDEO_CARDS);
return cards[card_index].capture->get_available_audio_inputs();
}
uint32_t get_current_audio_input(unsigned card_index) const {
- assert(card_index < num_cards);
+ assert(card_index < MAX_VIDEO_CARDS);
return cards[card_index].capture->get_current_audio_input();
}
void set_audio_input(unsigned card_index, uint32_t input) {
- assert(card_index < num_cards);
+ assert(card_index < MAX_VIDEO_CARDS);
cards[card_index].capture->set_audio_input(input);
}
private:
struct CaptureCard;
- enum class CardType {
- LIVE_CARD,
- FAKE_CAPTURE,
- FFMPEG_INPUT,
- CEF_INPUT,
- };
- void configure_card(unsigned card_index, bmusb::CaptureInterface *capture, CardType card_type, DeckLinkOutput *output);
+ void configure_card(unsigned card_index, bmusb::CaptureInterface *capture, CardType card_type, DeckLinkOutput *output, bool is_srt_card);
void set_output_card_internal(int card_index); // Should only be called from the mixer thread.
void bm_frame(unsigned card_index, uint16_t timecode,
bmusb::FrameAllocator::Frame video_frame, size_t video_offset, bmusb::VideoFormat video_format,
bmusb::FrameAllocator::Frame audio_frame, size_t audio_offset, bmusb::AudioFormat audio_format);
+ void upload_texture_for_frame(
+ int field, bmusb::VideoFormat video_format,
+ size_t y_offset, size_t cbcr_offset, size_t video_offset,
+ PBOFrameAllocator::Userdata *userdata);
void bm_hotplug_add(libusb_device *dev);
void bm_hotplug_remove(unsigned card_index);
void place_rectangle(movit::Effect *resample_effect, movit::Effect *padding_effect, float x0, float y0, float x1, float y1);
void render_one_frame(int64_t duration);
void audio_thread_func();
void release_display_frame(DisplayFrame *frame);
+#ifdef HAVE_SRT
+ void start_srt();
+#endif
double pts() { return double(pts_int) / TIMEBASE; }
void trim_queue(CaptureCard *card, size_t safe_queue_length);
std::pair<std::string, std::string> get_channels_json();
std::pair<std::string, std::string> get_channel_color_http(unsigned channel_idx);
HTTPD httpd;
- unsigned num_cards, num_video_inputs, num_html_inputs = 0;
+ unsigned num_video_inputs, num_html_inputs = 0;
QSurface *mixer_surface, *h264_encoder_surface, *decklink_output_surface, *image_update_surface;
std::unique_ptr<movit::ResourcePool> resource_pool;
// frame rate is integer, will always stay zero.
unsigned fractional_samples = 0;
+ // Monotonic counter that lets us know which slot was last turned into
+ // a fake capture. Used for SRT re-plugging.
+ unsigned fake_capture_counter = 0;
+
mutable std::mutex card_mutex;
bool has_bmusb_thread = false;
struct CaptureCard {
+ // If nullptr, the card is inactive, and will be hidden in the UI.
+ // Only fake capture cards can be inactive.
std::unique_ptr<bmusb::CaptureInterface> capture;
+ // If true, card must always be active (typically because it's one of the
+ // first cards, or because the theme has explicitly asked for it).
+ bool force_active = false;
bool is_fake_capture;
+ // If is_fake_capture is true, contains a monotonic timer value for when
+ // it was last changed. Otherwise undefined. Used for SRT re-plugging.
+ int fake_capture_counter;
+ std::string last_srt_stream_id = "<default, matches nothing>"; // Used for SRT re-plugging.
CardType type;
std::unique_ptr<DeckLinkOutput> output;
int64_t length; // In TIMEBASE units.
bool interlaced;
unsigned field; // Which field (0 or 1) of the frame to use. Always 0 for progressive.
- std::function<void()> upload_func; // Needs to be called to actually upload the texture to OpenGL.
+ bool texture_uploaded = false;
unsigned dropped_frames = 0; // Number of dropped frames before this one.
std::chrono::steady_clock::time_point received_timestamp = std::chrono::steady_clock::time_point::min();
+ movit::RGBTriplet neutral_color{1.0f, 1.0f, 1.0f};
- // Used for MJPEG encoding. (upload_func packs everything it needs
- // into the functor, but would otherwise also use these.)
+ // Used for MJPEG encoding, and texture upload.
// width=0 or height=0 means a broken frame, ie., do not upload.
bmusb::VideoFormat video_format;
- size_t y_offset, cbcr_offset;
+ size_t video_offset, y_offset, cbcr_offset;
};
std::deque<NewFrame> new_frames;
std::condition_variable new_frames_changed; // Set whenever new_frames is changed.
std::atomic<int64_t> metric_input_frame_rate_nom{-1};
std::atomic<int64_t> metric_input_frame_rate_den{-1};
std::atomic<int64_t> metric_input_sample_rate_hz{-1};
+
+ // SRT metrics.
+ std::atomic<double> metric_srt_uptime_seconds{0.0 / 0.0};
+ std::atomic<double> metric_srt_send_duration_seconds{0.0 / 0.0};
+ std::atomic<int64_t> metric_srt_sent_bytes{-1};
+ std::atomic<int64_t> metric_srt_received_bytes{-1};
+ std::atomic<int64_t> metric_srt_sent_packets_normal{-1};
+ std::atomic<int64_t> metric_srt_received_packets_normal{-1};
+ std::atomic<int64_t> metric_srt_sent_packets_lost{-1};
+ std::atomic<int64_t> metric_srt_received_packets_lost{-1};
+ std::atomic<int64_t> metric_srt_sent_packets_retransmitted{-1};
+ std::atomic<int64_t> metric_srt_sent_bytes_retransmitted{-1};
+ std::atomic<int64_t> metric_srt_sent_packets_ack{-1};
+ std::atomic<int64_t> metric_srt_received_packets_ack{-1};
+ std::atomic<int64_t> metric_srt_sent_packets_nak{-1};
+ std::atomic<int64_t> metric_srt_received_packets_nak{-1};
+ std::atomic<int64_t> metric_srt_sent_packets_dropped{-1};
+ std::atomic<int64_t> metric_srt_received_packets_dropped{-1};
+ std::atomic<int64_t> metric_srt_sent_bytes_dropped{-1};
+ std::atomic<int64_t> metric_srt_received_bytes_dropped{-1};
+ std::atomic<int64_t> metric_srt_received_packets_undecryptable{-1};
+ std::atomic<int64_t> metric_srt_received_bytes_undecryptable{-1};
+
+ std::atomic<int64_t> metric_srt_filter_received_extra_packets{-1};
+ std::atomic<int64_t> metric_srt_filter_received_rebuilt_packets{-1};
+ std::atomic<int64_t> metric_srt_filter_received_lost_packets{-1};
+
+ std::atomic<double> metric_srt_packet_sending_period_seconds{0.0 / 0.0};
+ std::atomic<int64_t> metric_srt_flow_window_packets{-1};
+ std::atomic<int64_t> metric_srt_congestion_window_packets{-1};
+ std::atomic<int64_t> metric_srt_flight_size_packets{-1};
+ std::atomic<double> metric_srt_rtt_seconds{0.0 / 0.0};
+ std::atomic<double> metric_srt_estimated_bandwidth_bits_per_second{0.0 / 0.0};
+ std::atomic<double> metric_srt_bandwidth_ceiling_bits_per_second{0.0 / 0.0};
+ std::atomic<int64_t> metric_srt_send_buffer_available_bytes{-1};
+ std::atomic<int64_t> metric_srt_receive_buffer_available_bytes{-1};
+ std::atomic<int64_t> metric_srt_mss_bytes{-1};
+ std::atomic<int64_t> metric_srt_sender_unacked_packets{-1};
+ std::atomic<int64_t> metric_srt_sender_unacked_bytes{-1};
+ std::atomic<double> metric_srt_sender_unacked_timespan_seconds{0.0 / 0.0};
+ std::atomic<double> metric_srt_sender_delivery_delay_seconds{0.0 / 0.0};
+ std::atomic<int64_t> metric_srt_receiver_unacked_packets{-1};
+ std::atomic<int64_t> metric_srt_receiver_unacked_bytes{-1};
+ std::atomic<double> metric_srt_receiver_unacked_timespan_seconds{0.0 / 0.0};
+ std::atomic<double> metric_srt_receiver_delivery_delay_seconds{0.0 / 0.0};
+ std::atomic<int64_t> metric_srt_filter_sent_packets{-1};
+
};
JitterHistory output_jitter_history;
CaptureCard cards[MAX_VIDEO_CARDS]; // Protected by <card_mutex>.
YCbCrInterpretation ycbcr_interpretation[MAX_VIDEO_CARDS]; // Protected by <card_mutex>.
+ movit::RGBTriplet last_received_neutral_color[MAX_VIDEO_CARDS]; // Used by the mixer thread only. Constructor-initialiezd.
std::unique_ptr<AudioMixer> audio_mixer; // Same as global_audio_mixer (see audio_mixer.h).
bool input_card_is_master_clock(unsigned card_index, unsigned master_card_index) const;
struct OutputFrameInfo {
};
OutputFrameInfo get_one_frame_from_each_card(unsigned master_card_index, bool master_card_is_output, CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS], bool has_new_frame[MAX_VIDEO_CARDS], std::vector<int32_t> raw_audio[MAX_VIDEO_CARDS]);
+#ifdef HAVE_SRT
+ void update_srt_stats(int srt_sock, Mixer::CaptureCard *card);
+#endif
+
+ std::string description_for_card(unsigned card_index);
+ static bool is_srt_card(const CaptureCard *card);
+
InputState input_state;
// Cards we have been noticed about being hotplugged, but haven't tried adding yet.
// Protected by its own mutex.
std::mutex hotplug_mutex;
std::vector<libusb_device *> hotplugged_cards;
+#ifdef HAVE_SRT
+ std::vector<int> hotplugged_srt_cards;
+#endif
class OutputChannel {
public:
std::thread mixer_thread;
std::thread audio_thread;
+#ifdef HAVE_SRT
+ std::thread srt_thread;
+#endif
std::atomic<bool> should_quit{false};
std::atomic<bool> should_cut{false};
projects / nageru / blobdiff