7 #include <movit/effect.h>
8 #include <movit/effect_chain.h>
9 #include <movit/effect_util.h>
10 #include <movit/flat_input.h>
11 #include <movit/image_format.h>
12 #include <movit/init.h>
13 #include <movit/resource_pool.h>
20 #include <condition_variable>
31 #include "DeckLinkAPI.h"
33 #include "alsa_output.h"
34 #include "basic_stats.h"
35 #include "bmusb/bmusb.h"
36 #include "bmusb/fake_capture.h"
38 #include "cef_capture.h"
40 #include "chroma_subsampler.h"
41 #include "shared/context.h"
42 #include "decklink_capture.h"
43 #include "decklink_output.h"
45 #include "shared/disk_space_estimator.h"
46 #include "ffmpeg_capture.h"
48 #include "image_input.h"
49 #include "input_mapping.h"
50 #include "shared/metrics.h"
51 #include "shared/va_display.h"
52 #include "mjpeg_encoder.h"
53 #include "pbo_frame_allocator.h"
54 #include "shared/ref_counted_gl_sync.h"
55 #include "resampling_queue.h"
56 #include "shared/timebase.h"
57 #include "timecode_renderer.h"
58 #include "v210_converter.h"
59 #include "video_encoder.h"
62 #include <google/protobuf/util/json_util.h>
66 // Must come after CEF, since it includes <syslog.h>, which has #defines
67 // that conflict with CEF logging constants.
74 using namespace movit;
76 using namespace std::chrono;
77 using namespace std::placeholders;
78 using namespace bmusb;
80 Mixer *global_mixer = nullptr;
84 void insert_new_frame(RefCountedFrame frame, unsigned field_num, bool interlaced, unsigned card_index, InputState *input_state)
87 for (unsigned frame_num = FRAME_HISTORY_LENGTH; frame_num --> 1; ) { // :-)
88 input_state->buffered_frames[card_index][frame_num] =
89 input_state->buffered_frames[card_index][frame_num - 1];
91 input_state->buffered_frames[card_index][0] = { frame, field_num };
93 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
94 input_state->buffered_frames[card_index][frame_num] = { frame, field_num };
99 void ensure_texture_resolution(PBOFrameAllocator::Userdata *userdata, unsigned field, unsigned width, unsigned height, unsigned cbcr_width, unsigned cbcr_height, unsigned v210_width)
102 switch (userdata->pixel_format) {
103 case PixelFormat_10BitYCbCr:
104 first = userdata->tex_v210[field] == 0 || userdata->tex_444[field] == 0;
106 case PixelFormat_8BitYCbCr:
107 first = userdata->tex_y[field] == 0 || userdata->tex_cbcr[field] == 0;
109 case PixelFormat_8BitBGRA:
110 first = userdata->tex_rgba[field] == 0;
112 case PixelFormat_8BitYCbCrPlanar:
113 first = userdata->tex_y[field] == 0 || userdata->tex_cb[field] == 0 || userdata->tex_cr[field] == 0;
119 const bool recreate_main_texture =
121 width != userdata->last_width[field] ||
122 height != userdata->last_height[field] ||
123 cbcr_width != userdata->last_cbcr_width[field] ||
124 cbcr_height != userdata->last_cbcr_height[field];
125 const bool recreate_v210_texture =
126 global_flags.ten_bit_input &&
127 (first || v210_width != userdata->last_v210_width[field] || height != userdata->last_height[field]);
129 if (recreate_main_texture) {
130 // We changed resolution since last use of this texture, so we need to create
131 // a new object. Note that this each card has its own PBOFrameAllocator,
132 // we don't need to worry about these flip-flopping between resolutions.
133 switch (userdata->pixel_format) {
134 case PixelFormat_10BitYCbCr:
135 glBindTexture(GL_TEXTURE_2D, userdata->tex_444[field]);
137 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, nullptr);
140 case PixelFormat_8BitYCbCr: {
141 glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
143 glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, cbcr_width, height, 0, GL_RG, GL_UNSIGNED_BYTE, nullptr);
145 glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
147 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
151 case PixelFormat_8BitYCbCrPlanar: {
152 glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
154 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
156 glBindTexture(GL_TEXTURE_2D, userdata->tex_cb[field]);
158 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, cbcr_width, cbcr_height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
160 glBindTexture(GL_TEXTURE_2D, userdata->tex_cr[field]);
162 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, cbcr_width, cbcr_height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
166 case PixelFormat_8BitBGRA:
167 glBindTexture(GL_TEXTURE_2D, userdata->tex_rgba[field]);
169 // NOTE: sRGB may be disabled by sRGBSwitchingFlatInput.
170 glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8_ALPHA8, width, height, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, nullptr);
176 userdata->last_width[field] = width;
177 userdata->last_height[field] = height;
178 userdata->last_cbcr_width[field] = cbcr_width;
179 userdata->last_cbcr_height[field] = cbcr_height;
181 if (recreate_v210_texture) {
182 // Same as above; we need to recreate the texture.
183 glBindTexture(GL_TEXTURE_2D, userdata->tex_v210[field]);
185 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, v210_width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, nullptr);
187 userdata->last_v210_width[field] = v210_width;
188 userdata->last_height[field] = height;
192 void upload_texture(GLuint tex, GLuint width, GLuint height, GLuint stride, bool interlaced_stride, GLenum format, GLenum type, GLintptr offset)
194 if (interlaced_stride) {
197 if (global_flags.flush_pbos) {
198 glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, offset, stride * height);
202 glBindTexture(GL_TEXTURE_2D, tex);
204 if (interlaced_stride) {
205 glPixelStorei(GL_UNPACK_ROW_LENGTH, width * 2);
208 glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
212 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, BUFFER_OFFSET(offset));
214 glBindTexture(GL_TEXTURE_2D, 0);
216 glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
222 void JitterHistory::register_metrics(const vector<pair<string, string>> &labels)
224 global_metrics.add("input_underestimated_jitter_frames", labels, &metric_input_underestimated_jitter_frames);
225 global_metrics.add("input_estimated_max_jitter_seconds", labels, &metric_input_estimated_max_jitter_seconds, Metrics::TYPE_GAUGE);
228 void JitterHistory::unregister_metrics(const vector<pair<string, string>> &labels)
230 global_metrics.remove("input_underestimated_jitter_frames", labels);
231 global_metrics.remove("input_estimated_max_jitter_seconds", labels);
234 void JitterHistory::frame_arrived(steady_clock::time_point now, int64_t frame_duration, size_t dropped_frames)
236 if (expected_timestamp > steady_clock::time_point::min()) {
237 expected_timestamp += dropped_frames * nanoseconds(frame_duration * 1000000000 / TIMEBASE);
238 double jitter_seconds = fabs(duration<double>(expected_timestamp - now).count());
239 history.push_back(orders.insert(jitter_seconds));
240 if (jitter_seconds > estimate_max_jitter()) {
241 ++metric_input_underestimated_jitter_frames;
244 metric_input_estimated_max_jitter_seconds = estimate_max_jitter();
246 if (history.size() > history_length) {
247 orders.erase(history.front());
250 assert(history.size() <= history_length);
252 expected_timestamp = now + nanoseconds(frame_duration * 1000000000 / TIMEBASE);
255 double JitterHistory::estimate_max_jitter() const
257 if (orders.empty()) {
260 size_t elem_idx = lrint((orders.size() - 1) * percentile);
261 if (percentile <= 0.5) {
262 return *next(orders.begin(), elem_idx) * multiplier;
264 return *prev(orders.end(), orders.size() - elem_idx) * multiplier;
268 void QueueLengthPolicy::register_metrics(const vector<pair<string, string>> &labels)
270 global_metrics.add("input_queue_safe_length_frames", labels, &metric_input_queue_safe_length_frames, Metrics::TYPE_GAUGE);
273 void QueueLengthPolicy::unregister_metrics(const vector<pair<string, string>> &labels)
275 global_metrics.remove("input_queue_safe_length_frames", labels);
278 void QueueLengthPolicy::update_policy(steady_clock::time_point now,
279 steady_clock::time_point expected_next_frame,
280 int64_t input_frame_duration,
281 int64_t master_frame_duration,
282 double max_input_card_jitter_seconds,
283 double max_master_card_jitter_seconds)
285 double input_frame_duration_seconds = input_frame_duration / double(TIMEBASE);
286 double master_frame_duration_seconds = master_frame_duration / double(TIMEBASE);
288 // Figure out when we can expect the next frame for this card, assuming
289 // worst-case jitter (ie., the frame is maximally late).
290 double seconds_until_next_frame = max(duration<double>(expected_next_frame - now).count() + max_input_card_jitter_seconds, 0.0);
292 // How many times are the master card expected to tick in that time?
293 // We assume the master clock has worst-case jitter but not any rate
294 // discrepancy, ie., it ticks as early as possible every time, but not
296 double frames_needed = (seconds_until_next_frame + max_master_card_jitter_seconds) / master_frame_duration_seconds;
298 // As a special case, if the master card ticks faster than the input card,
299 // we expect the queue to drain by itself even without dropping. But if
300 // the difference is small (e.g. 60 Hz master and 59.94 input), it would
301 // go slowly enough that the effect wouldn't really be appreciable.
302 // We account for this by looking at the situation five frames ahead,
303 // assuming everything else is the same.
304 double frames_allowed;
305 if (master_frame_duration < input_frame_duration) {
306 frames_allowed = frames_needed + 5 * (input_frame_duration_seconds - master_frame_duration_seconds) / master_frame_duration_seconds;
308 frames_allowed = frames_needed;
311 safe_queue_length = max<int>(floor(frames_allowed), 0);
312 metric_input_queue_safe_length_frames = safe_queue_length;
315 Mixer::Mixer(const QSurfaceFormat &format)
317 mixer_surface(create_surface(format)),
318 h264_encoder_surface(create_surface(format)),
319 decklink_output_surface(create_surface(format)),
320 image_update_surface(create_surface(format))
322 memcpy(ycbcr_interpretation, global_flags.ycbcr_interpretation, sizeof(ycbcr_interpretation));
323 CHECK(init_movit(MOVIT_SHADER_DIR, MOVIT_DEBUG_OFF));
326 if (!epoxy_has_gl_extension("GL_EXT_texture_sRGB_decode") ||
327 !epoxy_has_gl_extension("GL_ARB_sampler_objects")) {
328 fprintf(stderr, "Nageru requires GL_EXT_texture_sRGB_decode and GL_ARB_sampler_objects to run.\n");
332 // Since we allow non-bouncing 4:2:2 YCbCrInputs, effective subpixel precision
333 // will be halved when sampling them, and we need to compensate here.
334 movit_texel_subpixel_precision /= 2.0;
336 resource_pool.reset(new ResourcePool);
337 for (unsigned i = 0; i < NUM_OUTPUTS; ++i) {
338 output_channel[i].parent = this;
339 output_channel[i].channel = i;
342 ImageFormat inout_format;
343 inout_format.color_space = COLORSPACE_sRGB;
344 inout_format.gamma_curve = GAMMA_sRGB;
346 // Matches the 4:2:0 format created by the main chain.
347 YCbCrFormat ycbcr_format;
348 ycbcr_format.chroma_subsampling_x = 2;
349 ycbcr_format.chroma_subsampling_y = 2;
350 if (global_flags.ycbcr_rec709_coefficients) {
351 ycbcr_format.luma_coefficients = YCBCR_REC_709;
353 ycbcr_format.luma_coefficients = YCBCR_REC_601;
355 ycbcr_format.full_range = false;
356 ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
357 ycbcr_format.cb_x_position = 0.0f;
358 ycbcr_format.cr_x_position = 0.0f;
359 ycbcr_format.cb_y_position = 0.5f;
360 ycbcr_format.cr_y_position = 0.5f;
362 // Initialize the neutral colors to sane values.
363 for (unsigned i = 0; i < MAX_VIDEO_CARDS; ++i) {
364 last_received_neutral_color[i] = RGBTriplet(1.0f, 1.0f, 1.0f);
367 // Display chain; shows the live output produced by the main chain (or rather, a copy of it).
368 display_chain.reset(new EffectChain(global_flags.width, global_flags.height, resource_pool.get()));
370 GLenum type = global_flags.x264_bit_depth > 8 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
371 display_input = new YCbCrInput(inout_format, ycbcr_format, global_flags.width, global_flags.height, YCBCR_INPUT_SPLIT_Y_AND_CBCR, type);
372 display_chain->add_input(display_input);
373 display_chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
374 display_chain->set_dither_bits(0); // Don't bother.
375 display_chain->finalize();
377 video_encoder.reset(new VideoEncoder(resource_pool.get(), h264_encoder_surface, global_flags.va_display, global_flags.width, global_flags.height, &httpd, global_disk_space_estimator));
378 if (!global_flags.card_to_mjpeg_stream_export.empty()) {
379 mjpeg_encoder.reset(new MJPEGEncoder(&httpd, global_flags.va_display));
382 // Must be instantiated after VideoEncoder has initialized global_flags.use_zerocopy.
383 theme.reset(new Theme(global_flags.theme_filename, global_flags.theme_dirs, resource_pool.get()));
385 // Must be instantiated after the theme, as the theme decides the number of FFmpeg inputs.
386 std::vector<FFmpegCapture *> video_inputs = theme->get_video_inputs();
387 audio_mixer.reset(new AudioMixer);
389 httpd.add_endpoint("/channels", bind(&Mixer::get_channels_json, this), HTTPD::ALLOW_ALL_ORIGINS);
390 for (int channel_idx = 0; channel_idx < theme->get_num_channels(); ++channel_idx) {
392 snprintf(url, sizeof(url), "/channels/%d/color", channel_idx + 2);
393 httpd.add_endpoint(url, bind(&Mixer::get_channel_color_http, this, unsigned(channel_idx + 2)), HTTPD::ALLOW_ALL_ORIGINS);
396 // Start listening for clients only once VideoEncoder has written its header, if any.
397 httpd.start(global_flags.http_port);
399 // First try initializing the then PCI devices, then USB, then
400 // fill up with fake cards until we have the desired number of cards.
401 unsigned num_pci_devices = 0;
402 unsigned card_index = 0;
405 IDeckLinkIterator *decklink_iterator = CreateDeckLinkIteratorInstance();
406 if (decklink_iterator != nullptr) {
407 for ( ; card_index < unsigned(global_flags.max_num_cards); ++card_index) {
409 if (decklink_iterator->Next(&decklink) != S_OK) {
413 DeckLinkCapture *capture = new DeckLinkCapture(decklink, card_index);
414 DeckLinkOutput *output = new DeckLinkOutput(resource_pool.get(), decklink_output_surface, global_flags.width, global_flags.height, card_index);
415 if (!output->set_device(decklink)) {
419 configure_card(card_index, capture, CardType::LIVE_CARD, output, /*is_srt_card=*/false);
422 decklink_iterator->Release();
423 fprintf(stderr, "Found %u DeckLink PCI card(s).\n", num_pci_devices);
425 fprintf(stderr, "DeckLink drivers not found. Probing for USB cards only.\n");
429 unsigned num_usb_devices = BMUSBCapture::num_cards();
430 for (unsigned usb_card_index = 0; usb_card_index < num_usb_devices && card_index < unsigned(global_flags.max_num_cards); ++usb_card_index, ++card_index) {
431 BMUSBCapture *capture = new BMUSBCapture(usb_card_index);
432 capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, card_index));
433 configure_card(card_index, capture, CardType::LIVE_CARD, /*output=*/nullptr, /*is_srt_card=*/false);
435 fprintf(stderr, "Found %u USB card(s).\n", num_usb_devices);
437 // Fill up with fake cards for as long as we can, so that the FFmpeg
438 // and HTML cards always come last.
439 unsigned num_fake_cards = 0;
441 size_t num_html_inputs = theme->get_html_inputs().size();
443 size_t num_html_inputs = 0;
445 for ( ; card_index < MAX_VIDEO_CARDS - video_inputs.size() - num_html_inputs; ++card_index) {
446 // Only bother to activate fake capture cards to satisfy the minimum.
447 bool is_active = card_index < unsigned(global_flags.min_num_cards) || cards[card_index].force_active;
449 FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio);
450 configure_card(card_index, capture, CardType::FAKE_CAPTURE, /*output=*/nullptr, /*is_srt_card=*/false);
453 configure_card(card_index, nullptr, CardType::FAKE_CAPTURE, /*output=*/nullptr, /*is_srt_card=*/false);
457 if (num_fake_cards > 0) {
458 fprintf(stderr, "Initialized %u fake cards.\n", num_fake_cards);
461 // Initialize all video inputs the theme asked for.
462 for (unsigned video_card_index = 0; video_card_index < video_inputs.size(); ++card_index, ++video_card_index) {
463 if (card_index >= MAX_VIDEO_CARDS) {
464 fprintf(stderr, "ERROR: Not enough card slots available for the videos the theme requested.\n");
467 configure_card(card_index, video_inputs[video_card_index], CardType::FFMPEG_INPUT, /*output=*/nullptr, /*is_srt_card=*/false);
468 video_inputs[video_card_index]->set_card_index(card_index);
470 num_video_inputs = video_inputs.size();
473 // Same, for HTML inputs.
474 std::vector<CEFCapture *> html_inputs = theme->get_html_inputs();
475 for (unsigned html_card_index = 0; html_card_index < html_inputs.size(); ++card_index, ++html_card_index) {
476 if (card_index >= MAX_VIDEO_CARDS) {
477 fprintf(stderr, "ERROR: Not enough card slots available for the HTML inputs the theme requested.\n");
480 configure_card(card_index, html_inputs[html_card_index], CardType::CEF_INPUT, /*output=*/nullptr, /*is_srt_card=*/false);
481 html_inputs[html_card_index]->set_card_index(card_index);
483 num_html_inputs = html_inputs.size();
486 BMUSBCapture::set_card_connected_callback(bind(&Mixer::bm_hotplug_add, this, _1));
487 BMUSBCapture::start_bm_thread();
490 if (global_flags.srt_port >= 0) {
495 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
496 cards[card_index].queue_length_policy.reset(card_index);
499 chroma_subsampler.reset(new ChromaSubsampler(resource_pool.get()));
501 if (global_flags.ten_bit_input) {
502 if (!v210Converter::has_hardware_support()) {
503 fprintf(stderr, "ERROR: --ten-bit-input requires support for OpenGL compute shaders\n");
504 fprintf(stderr, " (OpenGL 4.3, or GL_ARB_compute_shader + GL_ARB_shader_image_load_store).\n");
507 v210_converter.reset(new v210Converter());
509 // These are all the widths listed in the Blackmagic SDK documentation
510 // (section 2.7.3, “Display Modes”).
511 v210_converter->precompile_shader(720);
512 v210_converter->precompile_shader(1280);
513 v210_converter->precompile_shader(1920);
514 v210_converter->precompile_shader(2048);
515 v210_converter->precompile_shader(3840);
516 v210_converter->precompile_shader(4096);
518 if (global_flags.ten_bit_output) {
519 if (!v210Converter::has_hardware_support()) {
520 fprintf(stderr, "ERROR: --ten-bit-output requires support for OpenGL compute shaders\n");
521 fprintf(stderr, " (OpenGL 4.3, or GL_ARB_compute_shader + GL_ARB_shader_image_load_store).\n");
526 timecode_renderer.reset(new TimecodeRenderer(resource_pool.get(), global_flags.width, global_flags.height));
527 display_timecode_in_stream = global_flags.display_timecode_in_stream;
528 display_timecode_on_stdout = global_flags.display_timecode_on_stdout;
530 if (global_flags.enable_alsa_output) {
531 alsa.reset(new ALSAOutput(OUTPUT_FREQUENCY, /*num_channels=*/2));
533 if (global_flags.output_card != -1) {
534 desired_output_card_index = global_flags.output_card;
535 set_output_card_internal(global_flags.output_card);
538 output_jitter_history.register_metrics({{ "card", "output" }});
540 ImageInput::start_update_thread(image_update_surface);
545 ImageInput::end_update_thread();
547 if (mjpeg_encoder != nullptr) {
548 mjpeg_encoder->stop();
551 BMUSBCapture::stop_bm_thread();
553 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
554 if (cards[card_index].capture != nullptr) { // Active.
555 cards[card_index].capture->stop_dequeue_thread();
557 if (cards[card_index].output) {
558 cards[card_index].output->end_output();
559 cards[card_index].output.reset();
563 video_encoder.reset(nullptr);
566 void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, CardType card_type, DeckLinkOutput *output, bool is_srt_card)
568 bool is_active = capture != nullptr;
570 printf("Configuring card %d...\n", card_index);
572 assert(card_type == CardType::FAKE_CAPTURE);
575 CaptureCard *card = &cards[card_index];
576 if (card->capture != nullptr) {
577 card_mutex.unlock(); // The dequeue thread could be waiting for bm_frame().
578 card->capture->stop_dequeue_thread();
581 card->capture.reset(capture);
582 card->is_fake_capture = (card_type == CardType::FAKE_CAPTURE);
583 if (card->is_fake_capture) {
584 card->fake_capture_counter = fake_capture_counter++;
586 card->is_cef_capture = (card_type == CardType::CEF_INPUT);
587 card->may_have_dropped_last_frame = false;
588 card->type = card_type;
589 if (card->output.get() != output) {
590 card->output.reset(output);
593 PixelFormat pixel_format;
594 if (card_type == CardType::FFMPEG_INPUT) {
595 pixel_format = capture->get_current_pixel_format();
596 } else if (card_type == CardType::CEF_INPUT) {
597 pixel_format = PixelFormat_8BitBGRA;
598 } else if (global_flags.ten_bit_input) {
599 pixel_format = PixelFormat_10BitYCbCr;
601 pixel_format = PixelFormat_8BitYCbCr;
605 card->capture->set_frame_callback(bind(&Mixer::bm_frame, this, card_index, _1, _2, _3, _4, _5, _6, _7));
606 if (card->frame_allocator == nullptr) {
607 card->frame_allocator.reset(new PBOFrameAllocator(pixel_format, 8 << 20, global_flags.width, global_flags.height, card_index, mjpeg_encoder.get())); // 8 MB.
609 // The format could have changed, but we cannot reset the allocator
610 // and create a new one from scratch, since there may be allocated
611 // frames from it that expect to call release_frame() on it.
612 // Instead, ask the allocator to create new frames for us and discard
613 // any old ones as they come back. This takes the mutex while
614 // allocating, but nothing should really be sending frames in there
615 // right now anyway (start_bm_capture() has not been called yet).
616 card->frame_allocator->reconfigure(pixel_format, 8 << 20, global_flags.width, global_flags.height, card_index, mjpeg_encoder.get());
618 card->capture->set_video_frame_allocator(card->frame_allocator.get());
619 if (card->surface == nullptr) {
620 card->surface = create_surface_with_same_format(mixer_surface);
622 while (!card->new_frames.empty()) card->new_frames.pop_front();
623 card->last_timecode = -1;
624 card->capture->set_pixel_format(pixel_format);
625 card->capture->configure_card();
627 // NOTE: start_bm_capture() happens in thread_func().
631 assert(card_type == CardType::FFMPEG_INPUT);
634 DeviceSpec device{InputSourceType::CAPTURE_CARD, card_index};
635 unsigned num_channels = card_type == CardType::LIVE_CARD ? 8 : 2;
637 audio_mixer->set_device_parameters(device, card->capture->get_description(), card_type, num_channels, /*active=*/true);
639 // Note: Keeps the previous name, if any.
641 snprintf(name, sizeof(name), "Fake card %u", card_index + 1);
642 audio_mixer->set_device_parameters(device, name, card_type, num_channels, /*active=*/false);
644 audio_mixer->reset_resampler(device);
645 audio_mixer->trigger_state_changed_callback();
647 // Unregister old metrics, if any.
648 if (!card->labels.empty()) {
649 const vector<pair<string, string>> &labels = card->labels;
650 card->jitter_history.unregister_metrics(labels);
651 card->queue_length_policy.unregister_metrics(labels);
652 global_metrics.remove_if_exists("input_received_frames", labels);
653 global_metrics.remove_if_exists("input_dropped_frames_jitter", labels);
654 global_metrics.remove_if_exists("input_dropped_frames_error", labels);
655 global_metrics.remove_if_exists("input_dropped_frames_resets", labels);
656 global_metrics.remove_if_exists("input_queue_length_frames", labels);
657 global_metrics.remove_if_exists("input_queue_duped_frames", labels);
659 global_metrics.remove_if_exists("input_has_signal_bool", labels);
660 global_metrics.remove_if_exists("input_is_connected_bool", labels);
661 global_metrics.remove_if_exists("input_interlaced_bool", labels);
662 global_metrics.remove_if_exists("input_width_pixels", labels);
663 global_metrics.remove_if_exists("input_height_pixels", labels);
664 global_metrics.remove_if_exists("input_frame_rate_nom", labels);
665 global_metrics.remove_if_exists("input_frame_rate_den", labels);
666 global_metrics.remove_if_exists("input_sample_rate_hz", labels);
670 // Global measurements (counters).
671 global_metrics.remove_if_exists("srt_uptime_seconds", labels);
672 global_metrics.remove_if_exists("srt_send_duration_seconds", labels);
673 global_metrics.remove_if_exists("srt_sent_bytes", labels);
674 global_metrics.remove_if_exists("srt_received_bytes", labels);
676 vector<pair<string, string>> packet_labels = card->labels;
677 packet_labels.emplace_back("type", "normal");
678 global_metrics.remove_if_exists("srt_sent_packets", packet_labels);
679 global_metrics.remove_if_exists("srt_received_packets", packet_labels);
681 packet_labels.back().second = "lost";
682 global_metrics.remove_if_exists("srt_sent_packets", packet_labels);
683 global_metrics.remove_if_exists("srt_received_packets", packet_labels);
685 packet_labels.back().second = "retransmitted";
686 global_metrics.remove_if_exists("srt_sent_packets", packet_labels);
687 global_metrics.remove_if_exists("srt_sent_bytes", packet_labels);
689 packet_labels.back().second = "ack";
690 global_metrics.remove_if_exists("srt_sent_packets", packet_labels);
691 global_metrics.remove_if_exists("srt_received_packets", packet_labels);
693 packet_labels.back().second = "nak";
694 global_metrics.remove_if_exists("srt_sent_packets", packet_labels);
695 global_metrics.remove_if_exists("srt_received_packets", packet_labels);
697 packet_labels.back().second = "dropped";
698 global_metrics.remove_if_exists("srt_sent_packets", packet_labels);
699 global_metrics.remove_if_exists("srt_received_packets", packet_labels);
700 global_metrics.remove_if_exists("srt_sent_bytes", packet_labels);
701 global_metrics.remove_if_exists("srt_received_bytes", packet_labels);
703 packet_labels.back().second = "undecryptable";
704 global_metrics.remove_if_exists("srt_received_packets", packet_labels);
705 global_metrics.remove_if_exists("srt_received_bytes", packet_labels);
707 global_metrics.remove_if_exists("srt_filter_sent_extra_packets", labels);
708 global_metrics.remove_if_exists("srt_filter_received_extra_packets", labels);
709 global_metrics.remove_if_exists("srt_filter_received_rebuilt_packets", labels);
710 global_metrics.remove_if_exists("srt_filter_received_lost_packets", labels);
712 // Instant measurements (gauges).
713 global_metrics.remove_if_exists("srt_packet_sending_period_seconds", labels);
714 global_metrics.remove_if_exists("srt_flow_window_packets", labels);
715 global_metrics.remove_if_exists("srt_congestion_window_packets", labels);
716 global_metrics.remove_if_exists("srt_flight_size_packets", labels);
717 global_metrics.remove_if_exists("srt_rtt_seconds", labels);
718 global_metrics.remove_if_exists("srt_estimated_bandwidth_bits_per_second", labels);
719 global_metrics.remove_if_exists("srt_bandwidth_ceiling_bits_per_second", labels);
720 global_metrics.remove_if_exists("srt_send_buffer_available_bytes", labels);
721 global_metrics.remove_if_exists("srt_receive_buffer_available_bytes", labels);
722 global_metrics.remove_if_exists("srt_mss_bytes", labels);
724 global_metrics.remove_if_exists("srt_sender_unacked_packets", labels);
725 global_metrics.remove_if_exists("srt_sender_unacked_bytes", labels);
726 global_metrics.remove_if_exists("srt_sender_unacked_timespan_seconds", labels);
727 global_metrics.remove_if_exists("srt_sender_delivery_delay_seconds", labels);
729 global_metrics.remove_if_exists("srt_receiver_unacked_packets", labels);
730 global_metrics.remove_if_exists("srt_receiver_unacked_bytes", labels);
731 global_metrics.remove_if_exists("srt_receiver_unacked_timespan_seconds", labels);
732 global_metrics.remove_if_exists("srt_receiver_delivery_delay_seconds", labels);
737 vector<pair<string, string>> labels;
739 snprintf(card_name, sizeof(card_name), "%d", card_index);
740 labels.emplace_back("card", card_name);
743 case CardType::LIVE_CARD:
744 labels.emplace_back("cardtype", "live");
746 case CardType::FAKE_CAPTURE:
747 labels.emplace_back("cardtype", "fake");
749 case CardType::FFMPEG_INPUT:
751 labels.emplace_back("cardtype", "srt");
753 labels.emplace_back("cardtype", "ffmpeg");
756 case CardType::CEF_INPUT:
757 labels.emplace_back("cardtype", "cef");
762 card->jitter_history.register_metrics(labels);
763 card->queue_length_policy.register_metrics(labels);
764 global_metrics.add("input_received_frames", labels, &card->metric_input_received_frames);
765 global_metrics.add("input_dropped_frames_jitter", labels, &card->metric_input_dropped_frames_jitter);
766 global_metrics.add("input_dropped_frames_error", labels, &card->metric_input_dropped_frames_error);
767 global_metrics.add("input_dropped_frames_resets", labels, &card->metric_input_resets);
768 global_metrics.add("input_queue_length_frames", labels, &card->metric_input_queue_length_frames, Metrics::TYPE_GAUGE);
769 global_metrics.add("input_queue_duped_frames", labels, &card->metric_input_duped_frames);
771 global_metrics.add("input_has_signal_bool", labels, &card->metric_input_has_signal_bool, Metrics::TYPE_GAUGE);
772 global_metrics.add("input_is_connected_bool", labels, &card->metric_input_is_connected_bool, Metrics::TYPE_GAUGE);
773 global_metrics.add("input_interlaced_bool", labels, &card->metric_input_interlaced_bool, Metrics::TYPE_GAUGE);
774 global_metrics.add("input_width_pixels", labels, &card->metric_input_width_pixels, Metrics::TYPE_GAUGE);
775 global_metrics.add("input_height_pixels", labels, &card->metric_input_height_pixels, Metrics::TYPE_GAUGE);
776 global_metrics.add("input_frame_rate_nom", labels, &card->metric_input_frame_rate_nom, Metrics::TYPE_GAUGE);
777 global_metrics.add("input_frame_rate_den", labels, &card->metric_input_frame_rate_den, Metrics::TYPE_GAUGE);
778 global_metrics.add("input_sample_rate_hz", labels, &card->metric_input_sample_rate_hz, Metrics::TYPE_GAUGE);
781 // Global measurements (counters).
782 global_metrics.add("srt_uptime_seconds", labels, &card->metric_srt_uptime_seconds);
783 global_metrics.add("srt_send_duration_seconds", labels, &card->metric_srt_send_duration_seconds);
784 global_metrics.add("srt_sent_bytes", labels, &card->metric_srt_sent_bytes);
785 global_metrics.add("srt_received_bytes", labels, &card->metric_srt_received_bytes);
787 vector<pair<string, string>> packet_labels = labels;
788 packet_labels.emplace_back("type", "normal");
789 global_metrics.add("srt_sent_packets", packet_labels, &card->metric_srt_sent_packets_normal);
790 global_metrics.add("srt_received_packets", packet_labels, &card->metric_srt_received_packets_normal);
792 packet_labels.back().second = "lost";
793 global_metrics.add("srt_sent_packets", packet_labels, &card->metric_srt_sent_packets_lost);
794 global_metrics.add("srt_received_packets", packet_labels, &card->metric_srt_received_packets_lost);
796 packet_labels.back().second = "retransmitted";
797 global_metrics.add("srt_sent_packets", packet_labels, &card->metric_srt_sent_packets_retransmitted);
798 global_metrics.add("srt_sent_bytes", packet_labels, &card->metric_srt_sent_bytes_retransmitted);
800 packet_labels.back().second = "ack";
801 global_metrics.add("srt_sent_packets", packet_labels, &card->metric_srt_sent_packets_ack);
802 global_metrics.add("srt_received_packets", packet_labels, &card->metric_srt_received_packets_ack);
804 packet_labels.back().second = "nak";
805 global_metrics.add("srt_sent_packets", packet_labels, &card->metric_srt_sent_packets_nak);
806 global_metrics.add("srt_received_packets", packet_labels, &card->metric_srt_received_packets_nak);
808 packet_labels.back().second = "dropped";
809 global_metrics.add("srt_sent_packets", packet_labels, &card->metric_srt_sent_packets_dropped);
810 global_metrics.add("srt_received_packets", packet_labels, &card->metric_srt_received_packets_dropped);
811 global_metrics.add("srt_sent_bytes", packet_labels, &card->metric_srt_sent_bytes_dropped);
812 global_metrics.add("srt_received_bytes", packet_labels, &card->metric_srt_received_bytes_dropped);
814 packet_labels.back().second = "undecryptable";
815 global_metrics.add("srt_received_packets", packet_labels, &card->metric_srt_received_packets_undecryptable);
816 global_metrics.add("srt_received_bytes", packet_labels, &card->metric_srt_received_bytes_undecryptable);
818 global_metrics.add("srt_filter_sent_extra_packets", labels, &card->metric_srt_filter_sent_packets);
819 global_metrics.add("srt_filter_received_extra_packets", labels, &card->metric_srt_filter_received_extra_packets);
820 global_metrics.add("srt_filter_received_rebuilt_packets", labels, &card->metric_srt_filter_received_rebuilt_packets);
821 global_metrics.add("srt_filter_received_lost_packets", labels, &card->metric_srt_filter_received_lost_packets);
823 // Instant measurements (gauges).
824 global_metrics.add("srt_packet_sending_period_seconds", labels, &card->metric_srt_packet_sending_period_seconds, Metrics::TYPE_GAUGE);
825 global_metrics.add("srt_flow_window_packets", labels, &card->metric_srt_flow_window_packets, Metrics::TYPE_GAUGE);
826 global_metrics.add("srt_congestion_window_packets", labels, &card->metric_srt_congestion_window_packets, Metrics::TYPE_GAUGE);
827 global_metrics.add("srt_flight_size_packets", labels, &card->metric_srt_flight_size_packets, Metrics::TYPE_GAUGE);
828 global_metrics.add("srt_rtt_seconds", labels, &card->metric_srt_rtt_seconds, Metrics::TYPE_GAUGE);
829 global_metrics.add("srt_estimated_bandwidth_bits_per_second", labels, &card->metric_srt_estimated_bandwidth_bits_per_second, Metrics::TYPE_GAUGE);
830 global_metrics.add("srt_bandwidth_ceiling_bits_per_second", labels, &card->metric_srt_bandwidth_ceiling_bits_per_second, Metrics::TYPE_GAUGE);
831 global_metrics.add("srt_send_buffer_available_bytes", labels, &card->metric_srt_send_buffer_available_bytes, Metrics::TYPE_GAUGE);
832 global_metrics.add("srt_receive_buffer_available_bytes", labels, &card->metric_srt_receive_buffer_available_bytes, Metrics::TYPE_GAUGE);
833 global_metrics.add("srt_mss_bytes", labels, &card->metric_srt_mss_bytes, Metrics::TYPE_GAUGE);
835 global_metrics.add("srt_sender_unacked_packets", labels, &card->metric_srt_sender_unacked_packets, Metrics::TYPE_GAUGE);
836 global_metrics.add("srt_sender_unacked_bytes", labels, &card->metric_srt_sender_unacked_bytes, Metrics::TYPE_GAUGE);
837 global_metrics.add("srt_sender_unacked_timespan_seconds", labels, &card->metric_srt_sender_unacked_timespan_seconds, Metrics::TYPE_GAUGE);
838 global_metrics.add("srt_sender_delivery_delay_seconds", labels, &card->metric_srt_sender_delivery_delay_seconds, Metrics::TYPE_GAUGE);
840 global_metrics.add("srt_receiver_unacked_packets", labels, &card->metric_srt_receiver_unacked_packets, Metrics::TYPE_GAUGE);
841 global_metrics.add("srt_receiver_unacked_bytes", labels, &card->metric_srt_receiver_unacked_bytes, Metrics::TYPE_GAUGE);
842 global_metrics.add("srt_receiver_unacked_timespan_seconds", labels, &card->metric_srt_receiver_unacked_timespan_seconds, Metrics::TYPE_GAUGE);
843 global_metrics.add("srt_receiver_delivery_delay_seconds", labels, &card->metric_srt_receiver_delivery_delay_seconds, Metrics::TYPE_GAUGE);
846 card->labels = labels;
848 card->labels.clear();
852 void Mixer::set_output_card_internal(int card_index)
854 // We don't really need to take card_mutex, since we're in the mixer
855 // thread and don't mess with any queues (which is the only thing that happens
856 // from other threads), but it's probably the safest in the long run.
857 unique_lock<mutex> lock(card_mutex);
858 if (output_card_index != -1) {
859 // Switch the old card from output to input.
860 CaptureCard *old_card = &cards[output_card_index];
861 old_card->output->end_output();
863 // Stop the fake card that we put into place.
864 // This needs to _not_ happen under the mutex, to avoid deadlock
865 // (delivering the last frame needs to take the mutex).
866 CaptureInterface *fake_capture = old_card->capture.get();
868 fake_capture->stop_dequeue_thread();
870 old_card->capture = move(old_card->parked_capture); // TODO: reset the metrics
871 old_card->is_fake_capture = false;
872 old_card->capture->start_bm_capture();
874 if (card_index != -1) {
875 CaptureCard *card = &cards[card_index];
876 CaptureInterface *capture = card->capture.get();
877 // TODO: DeckLinkCapture::stop_dequeue_thread can actually take
878 // several seconds to complete (blocking on DisableVideoInput);
879 // see if we can maybe do it asynchronously.
881 capture->stop_dequeue_thread();
883 card->parked_capture = move(card->capture);
884 CaptureInterface *fake_capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio);
885 configure_card(card_index, fake_capture, CardType::FAKE_CAPTURE, card->output.release(), /*is_srt_card=*/false);
886 card->queue_length_policy.reset(card_index);
887 card->capture->start_bm_capture();
888 desired_output_video_mode = output_video_mode = card->output->pick_video_mode(desired_output_video_mode);
889 card->output->start_output(desired_output_video_mode, pts_int);
891 output_card_index = card_index;
892 output_jitter_history.clear();
897 int unwrap_timecode(uint16_t current_wrapped, int last)
899 uint16_t last_wrapped = last & 0xffff;
900 if (current_wrapped > last_wrapped) {
901 return (last & ~0xffff) | current_wrapped;
903 return 0x10000 + ((last & ~0xffff) | current_wrapped);
909 void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
910 FrameAllocator::Frame video_frame, size_t video_offset, VideoFormat video_format,
911 FrameAllocator::Frame audio_frame, size_t audio_offset, AudioFormat audio_format)
913 DeviceSpec device{InputSourceType::CAPTURE_CARD, card_index};
914 CaptureCard *card = &cards[card_index];
916 ++card->metric_input_received_frames;
917 card->metric_input_has_signal_bool = video_format.has_signal;
918 card->metric_input_is_connected_bool = video_format.is_connected;
919 card->metric_input_interlaced_bool = video_format.interlaced;
920 card->metric_input_width_pixels = video_format.width;
921 card->metric_input_height_pixels = video_format.height;
922 card->metric_input_frame_rate_nom = video_format.frame_rate_nom;
923 card->metric_input_frame_rate_den = video_format.frame_rate_den;
924 card->metric_input_sample_rate_hz = audio_format.sample_rate;
926 if (is_mode_scanning[card_index]) {
927 if (video_format.has_signal) {
928 // Found a stable signal, so stop scanning.
929 is_mode_scanning[card_index] = false;
931 static constexpr double switch_time_s = 0.1; // Should be enough time for the signal to stabilize.
932 steady_clock::time_point now = steady_clock::now();
933 double sec_since_last_switch = duration<double>(steady_clock::now() - last_mode_scan_change[card_index]).count();
934 if (sec_since_last_switch > switch_time_s) {
935 // It isn't this mode; try the next one.
936 mode_scanlist_index[card_index]++;
937 mode_scanlist_index[card_index] %= mode_scanlist[card_index].size();
938 cards[card_index].capture->set_video_mode(mode_scanlist[card_index][mode_scanlist_index[card_index]]);
939 last_mode_scan_change[card_index] = now;
944 int64_t frame_length = int64_t(TIMEBASE) * video_format.frame_rate_den / video_format.frame_rate_nom;
945 assert(frame_length > 0);
947 size_t num_samples = (audio_frame.len > audio_offset) ? (audio_frame.len - audio_offset) / audio_format.num_channels / (audio_format.bits_per_sample / 8) : 0;
948 if (num_samples > OUTPUT_FREQUENCY / 10 && card->type != CardType::FFMPEG_INPUT) {
949 printf("%s: Dropping frame with implausible audio length (len=%d, offset=%d) [timecode=0x%04x video_len=%d video_offset=%d video_format=%x)\n",
950 description_for_card(card_index).c_str(), int(audio_frame.len), int(audio_offset),
951 timecode, int(video_frame.len), int(video_offset), video_format.id);
952 if (video_frame.owner) {
953 video_frame.owner->release_frame(video_frame);
955 if (audio_frame.owner) {
956 audio_frame.owner->release_frame(audio_frame);
961 int dropped_frames = 0;
962 if (card->last_timecode != -1) {
963 dropped_frames = unwrap_timecode(timecode, card->last_timecode) - card->last_timecode - 1;
966 // Number of samples per frame if we need to insert silence.
967 // (Could be nonintegral, but resampling will save us then.)
968 const int silence_samples = OUTPUT_FREQUENCY * video_format.frame_rate_den / video_format.frame_rate_nom;
970 if (dropped_frames > MAX_FPS * 2) {
971 fprintf(stderr, "%s lost more than two seconds (or time code jumping around; from 0x%04x to 0x%04x), resetting resampler\n",
972 description_for_card(card_index).c_str(), card->last_timecode, timecode);
973 audio_mixer->reset_resampler(device);
975 ++card->metric_input_resets;
976 } else if (dropped_frames > 0) {
977 // Insert silence as needed.
978 fprintf(stderr, "%s dropped %d frame(s) (before timecode 0x%04x), inserting silence.\n",
979 description_for_card(card_index).c_str(), dropped_frames, timecode);
980 card->metric_input_dropped_frames_error += dropped_frames;
984 success = audio_mixer->add_silence(device, silence_samples, dropped_frames);
988 if (num_samples > 0) {
989 audio_mixer->add_audio(device, audio_frame.data + audio_offset, num_samples, audio_format, audio_frame.received_timestamp);
991 // Audio for the MJPEG stream. We don't resample; audio that's not in 48 kHz
992 // just gets dropped for now.
994 // Only bother doing MJPEG encoding if there are any connected clients
995 // that want the stream.
996 if (httpd.get_num_connected_multicam_clients() > 0 ||
997 httpd.get_num_connected_siphon_clients(card_index) > 0) {
998 vector<int32_t> converted_samples = convert_audio_to_fixed32(audio_frame.data + audio_offset, num_samples, audio_format, 2);
999 lock_guard<mutex> lock(card_mutex);
1000 if (card->new_raw_audio.empty()) {
1001 card->new_raw_audio = move(converted_samples);
1003 // For raw audio, we don't really synchronize audio and video;
1004 // we just put the audio in frame by frame, and if a video frame is
1005 // dropped, we still keep the audio, which means it will be added
1006 // to the beginning of the next frame. It would probably be better
1007 // to move the audio pts earlier to show this, but most players can
1008 // live with some jitter, and in a lot of ways, it's much nicer for
1009 // Futatabi to have all audio locked to a video frame.
1010 card->new_raw_audio.insert(card->new_raw_audio.end(), converted_samples.begin(), converted_samples.end());
1012 // Truncate to one second, just to be sure we don't have infinite buildup in case of weirdness.
1013 if (card->new_raw_audio.size() > OUTPUT_FREQUENCY * 2) {
1014 size_t excess_samples = card->new_raw_audio.size() - OUTPUT_FREQUENCY * 2;
1015 card->new_raw_audio.erase(card->new_raw_audio.begin(), card->new_raw_audio.begin() + excess_samples);
1021 // Done with the audio, so release it.
1022 if (audio_frame.owner) {
1023 audio_frame.owner->release_frame(audio_frame);
1026 card->last_timecode = timecode;
1028 PBOFrameAllocator::Userdata *userdata = (PBOFrameAllocator::Userdata *)video_frame.userdata;
1029 if (card->type == CardType::FFMPEG_INPUT && userdata != nullptr) {
1030 FFmpegCapture *ffmpeg_capture = static_cast<FFmpegCapture *>(card->capture.get());
1031 userdata->has_last_subtitle = ffmpeg_capture->get_has_last_subtitle();
1032 userdata->last_subtitle = ffmpeg_capture->get_last_subtitle();
1035 if (card->type == CardType::FFMPEG_INPUT) {
1036 int srt_sock = static_cast<FFmpegCapture *>(card->capture.get())->get_srt_sock();
1037 if (srt_sock != -1) {
1038 update_srt_stats(srt_sock, card);
1043 size_t y_offset, cbcr_offset;
1044 size_t expected_length = video_format.stride * (video_format.height + video_format.extra_lines_top + video_format.extra_lines_bottom);
1045 if (userdata != nullptr && userdata->pixel_format == PixelFormat_8BitYCbCrPlanar) {
1046 // The calculation above is wrong for planar Y'CbCr, so just override it.
1047 assert(card->type == CardType::FFMPEG_INPUT);
1048 assert(video_offset == 0);
1049 expected_length = video_frame.len;
1051 userdata->ycbcr_format = (static_cast<FFmpegCapture *>(card->capture.get()))->get_current_frame_ycbcr_format();
1053 cbcr_offset = video_format.width * video_format.height;
1055 // All the other Y'CbCr formats are 4:2:2.
1056 y_offset = video_frame.size / 2 + video_offset / 2;
1057 cbcr_offset = video_offset / 2;
1059 if (video_frame.len - video_offset == 0 ||
1060 video_frame.len - video_offset != expected_length) {
1061 if (video_frame.len != 0) {
1062 printf("%s: Dropping video frame with wrong length (%zu; expected %zu)\n",
1063 description_for_card(card_index).c_str(), video_frame.len - video_offset, expected_length);
1065 if (video_frame.owner) {
1066 video_frame.owner->release_frame(video_frame);
1069 // Still send on the information that we _had_ a frame, even though it's corrupted,
1070 // so that pts can go up accordingly.
1072 lock_guard<mutex> lock(card_mutex);
1073 CaptureCard::NewFrame new_frame;
1074 new_frame.frame = RefCountedFrame(FrameAllocator::Frame());
1075 new_frame.length = frame_length;
1076 new_frame.interlaced = false;
1077 new_frame.dropped_frames = dropped_frames;
1078 new_frame.received_timestamp = video_frame.received_timestamp;
1079 card->new_frames.push_back(move(new_frame));
1080 card->jitter_history.frame_arrived(video_frame.received_timestamp, frame_length, dropped_frames);
1082 card->new_frames_changed.notify_all();
1086 unsigned num_fields = video_format.interlaced ? 2 : 1;
1087 steady_clock::time_point frame_upload_start;
1088 if (video_format.interlaced) {
1089 // Send the two fields along as separate frames; the other side will need to add
1090 // a deinterlacer to actually get this right.
1091 assert(video_format.height % 2 == 0);
1092 video_format.height /= 2;
1093 assert(frame_length % 2 == 0);
1096 frame_upload_start = steady_clock::now();
1098 assert(userdata != nullptr);
1099 userdata->last_interlaced = video_format.interlaced;
1100 userdata->last_has_signal = video_format.has_signal;
1101 userdata->last_is_connected = video_format.is_connected;
1102 userdata->last_frame_rate_nom = video_format.frame_rate_nom;
1103 userdata->last_frame_rate_den = video_format.frame_rate_den;
1104 RefCountedFrame frame(video_frame);
1106 // Send the frames on to the main thread, which will upload and process htem.
1107 // It is entirely possible to upload them in the same thread (and it might even be
1108 // faster, depending on the GPU and driver), but it appears to be trickling
1109 // driver bugs very easily.
1111 // Note that this means we must hold on to the actual frame data in <userdata>
1112 // until the upload is done, but we hold on to <frame> much longer than that
1113 // (in fact, all the way until we no longer use the texture in rendering).
1114 for (unsigned field = 0; field < num_fields; ++field) {
1116 // Don't upload the second field as fast as we can; wait until
1117 // the field time has approximately passed. (Otherwise, we could
1118 // get timing jitter against the other sources, and possibly also
1119 // against the video display, although the latter is not as critical.)
1120 // This requires our system clock to be reasonably close to the
1121 // video clock, but that's not an unreasonable assumption.
1122 steady_clock::time_point second_field_start = frame_upload_start +
1123 nanoseconds(frame_length * 1000000000 / TIMEBASE);
1124 this_thread::sleep_until(second_field_start);
1128 lock_guard<mutex> lock(card_mutex);
1129 CaptureCard::NewFrame new_frame;
1130 new_frame.frame = frame;
1131 new_frame.length = frame_length;
1132 new_frame.field = field;
1133 new_frame.interlaced = video_format.interlaced;
1134 new_frame.dropped_frames = dropped_frames;
1135 new_frame.received_timestamp = video_frame.received_timestamp; // Ignore the audio timestamp.
1136 new_frame.video_format = video_format;
1137 new_frame.video_offset = video_offset;
1138 new_frame.y_offset = y_offset;
1139 new_frame.cbcr_offset = cbcr_offset;
1140 new_frame.texture_uploaded = false;
1141 if (card->type == CardType::FFMPEG_INPUT) {
1142 FFmpegCapture *ffmpeg_capture = static_cast<FFmpegCapture *>(card->capture.get());
1143 new_frame.neutral_color = ffmpeg_capture->get_last_neutral_color();
1145 card->new_frames.push_back(move(new_frame));
1146 card->jitter_history.frame_arrived(video_frame.received_timestamp, frame_length, dropped_frames);
1147 card->may_have_dropped_last_frame = false;
1149 card->new_frames_changed.notify_all();
1153 void Mixer::upload_texture_for_frame(
1154 int field, bmusb::VideoFormat video_format,
1155 size_t y_offset, size_t cbcr_offset, size_t video_offset, PBOFrameAllocator::Userdata *userdata)
1157 size_t cbcr_width, cbcr_height;
1158 if (userdata != nullptr && userdata->pixel_format == PixelFormat_8BitYCbCrPlanar) {
1159 cbcr_width = video_format.width / userdata->ycbcr_format.chroma_subsampling_x;
1160 cbcr_height = video_format.height / userdata->ycbcr_format.chroma_subsampling_y;
1162 // All the other Y'CbCr formats are 4:2:2.
1163 cbcr_width = video_format.width / 2;
1164 cbcr_height = video_format.height;
1167 bool interlaced_stride = video_format.interlaced && (video_format.second_field_start == 1);
1168 if (video_format.interlaced) {
1172 unsigned field_start_line;
1174 field_start_line = video_format.second_field_start;
1176 field_start_line = video_format.extra_lines_top;
1179 // For anything not FRAME_FORMAT_YCBCR_10BIT, v210_width will be nonsensical but not used.
1180 size_t v210_width = video_format.stride / sizeof(uint32_t);
1181 ensure_texture_resolution(userdata, field, video_format.width, video_format.height, cbcr_width, cbcr_height, v210_width);
1183 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, userdata->pbo);
1186 switch (userdata->pixel_format) {
1187 case PixelFormat_10BitYCbCr: {
1188 size_t field_start = video_offset + video_format.stride * field_start_line;
1189 upload_texture(userdata->tex_v210[field], v210_width, video_format.height, video_format.stride, interlaced_stride, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, field_start);
1190 v210_converter->convert(userdata->tex_v210[field], userdata->tex_444[field], video_format.width, video_format.height);
1193 case PixelFormat_8BitYCbCr: {
1194 size_t field_y_start = y_offset + video_format.width * field_start_line;
1195 size_t field_cbcr_start = cbcr_offset + cbcr_width * field_start_line * sizeof(uint16_t);
1197 // Make up our own strides, since we are interleaving.
1198 upload_texture(userdata->tex_y[field], video_format.width, video_format.height, video_format.width, interlaced_stride, GL_RED, GL_UNSIGNED_BYTE, field_y_start);
1199 upload_texture(userdata->tex_cbcr[field], cbcr_width, cbcr_height, cbcr_width * sizeof(uint16_t), interlaced_stride, GL_RG, GL_UNSIGNED_BYTE, field_cbcr_start);
1202 case PixelFormat_8BitYCbCrPlanar: {
1203 assert(field_start_line == 0); // We don't really support interlaced here.
1204 size_t field_y_start = y_offset;
1205 size_t field_cb_start = cbcr_offset;
1206 size_t field_cr_start = cbcr_offset + cbcr_width * cbcr_height;
1208 // Make up our own strides, since we are interleaving.
1209 upload_texture(userdata->tex_y[field], video_format.width, video_format.height, video_format.width, interlaced_stride, GL_RED, GL_UNSIGNED_BYTE, field_y_start);
1210 upload_texture(userdata->tex_cb[field], cbcr_width, cbcr_height, cbcr_width, interlaced_stride, GL_RED, GL_UNSIGNED_BYTE, field_cb_start);
1211 upload_texture(userdata->tex_cr[field], cbcr_width, cbcr_height, cbcr_width, interlaced_stride, GL_RED, GL_UNSIGNED_BYTE, field_cr_start);
1214 case PixelFormat_8BitBGRA: {
1215 size_t field_start = video_offset + video_format.stride * field_start_line;
1216 upload_texture(userdata->tex_rgba[field], video_format.width, video_format.height, video_format.stride, interlaced_stride, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, field_start);
1217 // These could be asked to deliver mipmaps at any time.
1218 glBindTexture(GL_TEXTURE_2D, userdata->tex_rgba[field]);
1220 glGenerateMipmap(GL_TEXTURE_2D);
1222 glBindTexture(GL_TEXTURE_2D, 0);
1230 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
1234 void Mixer::bm_hotplug_add(libusb_device *dev)
1236 lock_guard<mutex> lock(hotplug_mutex);
1237 hotplugged_cards.push_back(dev);
1240 void Mixer::bm_hotplug_remove(unsigned card_index)
1242 cards[card_index].new_frames_changed.notify_all();
1245 void Mixer::thread_func()
1247 pthread_setname_np(pthread_self(), "Mixer_OpenGL");
1249 eglBindAPI(EGL_OPENGL_API);
1250 QOpenGLContext *context = create_context(mixer_surface);
1251 if (!make_current(context, mixer_surface)) {
1256 // Start the actual capture. (We don't want to do it before we're actually ready
1257 // to process output frames.)
1258 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
1259 if (int(card_index) != output_card_index && cards[card_index].capture != nullptr) {
1260 cards[card_index].capture->start_bm_capture();
1264 BasicStats basic_stats(/*verbose=*/true, /*use_opengl=*/true);
1265 int stats_dropped_frames = 0;
1267 while (!should_quit) {
1268 if (desired_output_card_index != output_card_index) {
1269 set_output_card_internal(desired_output_card_index);
1271 if (output_card_index != -1 &&
1272 desired_output_video_mode != output_video_mode) {
1273 DeckLinkOutput *output = cards[output_card_index].output.get();
1274 output->end_output();
1275 desired_output_video_mode = output_video_mode = output->pick_video_mode(desired_output_video_mode);
1276 output->start_output(desired_output_video_mode, pts_int);
1280 lock_guard<mutex> lock(card_mutex);
1281 handle_hotplugged_cards();
1284 CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS];
1285 bool has_new_frame[MAX_VIDEO_CARDS] = { false };
1287 bool master_card_is_output;
1288 unsigned master_card_index;
1289 if (output_card_index != -1) {
1290 master_card_is_output = true;
1291 master_card_index = output_card_index;
1293 master_card_is_output = false;
1294 master_card_index = theme->map_signal_to_card(master_clock_channel);
1295 assert(master_card_index < MAX_VIDEO_CARDS);
1298 vector<int32_t> raw_audio[MAX_VIDEO_CARDS]; // For MJPEG encoding.
1299 OutputFrameInfo output_frame_info = get_one_frame_from_each_card(master_card_index, master_card_is_output, new_frames, has_new_frame, raw_audio);
1300 schedule_audio_resampling_tasks(output_frame_info.dropped_frames, output_frame_info.num_samples, output_frame_info.frame_duration, output_frame_info.is_preroll, output_frame_info.frame_timestamp);
1301 stats_dropped_frames += output_frame_info.dropped_frames;
1303 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
1304 if (card_index == master_card_index || !has_new_frame[card_index]) {
1307 if (new_frames[card_index].frame->len == 0) {
1308 ++new_frames[card_index].dropped_frames;
1310 if (new_frames[card_index].dropped_frames > 0) {
1311 printf("%s dropped %d frames before this\n",
1312 description_for_card(card_index).c_str(), int(new_frames[card_index].dropped_frames));
1316 // If the first card is reporting a corrupted or otherwise dropped frame,
1317 // just increase the pts (skipping over this frame) and don't try to compute anything new.
1318 if (!master_card_is_output &&
1319 new_frames[master_card_index].frame != nullptr && // Timeout.
1320 new_frames[master_card_index].frame->len == 0) {
1321 ++stats_dropped_frames;
1322 pts_int += new_frames[master_card_index].length;
1326 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
1327 if (!has_new_frame[card_index] || new_frames[card_index].frame->len == 0)
1330 CaptureCard::NewFrame *new_frame = &new_frames[card_index];
1331 assert(new_frame->frame != nullptr);
1332 insert_new_frame(new_frame->frame, new_frame->field, new_frame->interlaced, card_index, &input_state);
1335 // The new texture might need uploading before use.
1336 if (!new_frame->texture_uploaded) {
1337 upload_texture_for_frame(new_frame->field, new_frame->video_format, new_frame->y_offset, new_frame->cbcr_offset,
1338 new_frame->video_offset, (PBOFrameAllocator::Userdata *)new_frame->frame->userdata);
1339 new_frame->texture_uploaded = true;
1342 // Only set the white balance if it actually changed. This means that the user
1343 // is free to override the white balance in a video with no white balance information
1344 // actually set (ie. r=g=b=1 all the time), or one where the white point is wrong,
1345 // but frame-to-frame decisions will be heeded. We do this pretty much as late
1346 // as possible (ie., after picking out the frame from the buffer), so that we are sure
1347 // that the change takes effect on exactly the right frame.
1348 if (fabs(new_frame->neutral_color.r - last_received_neutral_color[card_index].r) > 1e-3 ||
1349 fabs(new_frame->neutral_color.g - last_received_neutral_color[card_index].g) > 1e-3 ||
1350 fabs(new_frame->neutral_color.b - last_received_neutral_color[card_index].b) > 1e-3) {
1351 theme->set_wb_for_card(card_index, new_frame->neutral_color.r, new_frame->neutral_color.g, new_frame->neutral_color.b);
1352 last_received_neutral_color[card_index] = new_frame->neutral_color;
1355 if (new_frame->frame->data_copy != nullptr && mjpeg_encoder->should_encode_mjpeg_for_card(card_index)) {
1356 RGBTriplet neutral_color = theme->get_white_balance_for_card(card_index);
1357 mjpeg_encoder->upload_frame(pts_int, card_index, new_frame->frame, new_frame->video_format, new_frame->y_offset, new_frame->cbcr_offset, move(raw_audio[card_index]), neutral_color);
1362 int64_t frame_duration = output_frame_info.frame_duration;
1363 render_one_frame(frame_duration);
1365 lock_guard<mutex> lock(frame_num_mutex);
1368 frame_num_updated.notify_all();
1369 pts_int += frame_duration;
1371 basic_stats.update(frame_num, stats_dropped_frames);
1372 // if (frame_num % 100 == 0) chain->print_phase_timing();
1374 if (should_cut.exchange(false)) { // Test and clear.
1375 video_encoder->do_cut(frame_num);
1379 // Reset every 100 frames, so that local variations in frame times
1380 // (especially for the first few frames, when the shaders are
1381 // compiled etc.) don't make it hard to measure for the entire
1382 // remaining duration of the program.
1383 if (frame == 10000) {
1391 resource_pool->clean_context();
1394 bool Mixer::input_card_is_master_clock(unsigned card_index, unsigned master_card_index) const
1396 if (output_card_index != -1) {
1397 // The output card (ie., cards[output_card_index].output) is the master clock,
1398 // so no input card (ie., cards[card_index].capture) is.
1401 return (card_index == master_card_index);
1404 void Mixer::trim_queue(CaptureCard *card, size_t safe_queue_length)
1406 // Count the number of frames in the queue, including any frames
1407 // we dropped. It's hard to know exactly how we should deal with
1408 // dropped (corrupted) input frames; they don't help our goal of
1409 // avoiding starvation, but they still add to the problem of latency.
1410 // Since dropped frames is going to mean a bump in the signal anyway,
1411 // we err on the side of having more stable latency instead.
1412 unsigned queue_length = 0;
1413 for (const CaptureCard::NewFrame &frame : card->new_frames) {
1414 queue_length += frame.dropped_frames + 1;
1417 // If needed, drop frames until the queue is below the safe limit.
1418 // We prefer to drop from the head, because all else being equal,
1419 // we'd like more recent frames (less latency).
1420 unsigned dropped_frames = 0;
1421 while (queue_length > safe_queue_length) {
1422 assert(!card->new_frames.empty());
1423 assert(queue_length > card->new_frames.front().dropped_frames);
1424 queue_length -= card->new_frames.front().dropped_frames;
1426 if (queue_length <= safe_queue_length) {
1427 // No need to drop anything.
1431 card->new_frames.pop_front();
1432 card->new_frames_changed.notify_all();
1436 if (queue_length == 0 && card->is_cef_capture) {
1437 card->may_have_dropped_last_frame = true;
1441 card->metric_input_dropped_frames_jitter += dropped_frames;
1442 card->metric_input_queue_length_frames = queue_length;
1445 if (dropped_frames > 0) {
1446 fprintf(stderr, "Card %u dropped %u frame(s) to keep latency down.\n",
1447 card_index, dropped_frames);
1452 pair<string, string> Mixer::get_channels_json()
1455 for (int channel_idx = 0; channel_idx < theme->get_num_channels(); ++channel_idx) {
1456 Channel *channel = ret.add_channel();
1457 channel->set_index(channel_idx + 2);
1458 channel->set_name(theme->get_channel_name(channel_idx + 2));
1459 channel->set_color(theme->get_channel_color(channel_idx + 2));
1462 google::protobuf::util::MessageToJsonString(ret, &contents); // Ignore any errors.
1463 return make_pair(contents, "text/json");
1466 pair<string, string> Mixer::get_channel_color_http(unsigned channel_idx)
1468 return make_pair(theme->get_channel_color(channel_idx), "text/plain");
1471 Mixer::OutputFrameInfo Mixer::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], vector<int32_t> raw_audio[MAX_VIDEO_CARDS])
1473 OutputFrameInfo output_frame_info;
1474 constexpr steady_clock::duration master_card_timeout = milliseconds(200);
1476 unique_lock<mutex> lock(card_mutex, defer_lock);
1477 bool timed_out = false;
1478 if (master_card_is_output) {
1479 // Clocked to the output, so wait for it to be ready for the next frame.
1480 cards[master_card_index].output->wait_for_frame(pts_int, &output_frame_info.dropped_frames, &output_frame_info.frame_duration, &output_frame_info.is_preroll, &output_frame_info.frame_timestamp);
1483 // Wait for the master card to have a new frame.
1484 output_frame_info.is_preroll = false;
1486 timed_out = !cards[master_card_index].new_frames_changed.wait_for(lock,
1487 master_card_timeout,
1488 [this, master_card_index] {
1489 return !cards[master_card_index].new_frames.empty() ||
1490 cards[master_card_index].capture == nullptr ||
1491 cards[master_card_index].capture->get_disconnected();
1494 fprintf(stderr, "WARNING: Master card (%s) did not deliver a frame for %u ms, creating a fake one.\n",
1495 description_for_card(master_card_index).c_str(),
1496 unsigned(duration_cast<milliseconds>(master_card_timeout).count()));
1501 // The master card stalled for 200 ms (possible when it's e.g.
1502 // an SRT card). Send a frame no matter what; this also makes sure
1503 // any other cards get to empty their queues, and in general,
1504 // that we make _some_ sort of forward progress.
1505 handle_hotplugged_cards();
1506 } else if (master_card_is_output) {
1507 handle_hotplugged_cards();
1508 } else if (cards[master_card_index].new_frames.empty()) {
1509 // We were woken up, but not due to a new frame. Deal with it
1510 // and then restart.
1511 assert(cards[master_card_index].capture == nullptr ||
1512 cards[master_card_index].capture->get_disconnected());
1513 handle_hotplugged_cards();
1518 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
1519 CaptureCard *card = &cards[card_index];
1520 if (card->new_frames.empty()) { // Starvation.
1521 ++card->metric_input_duped_frames;
1523 if (card->is_cef_capture && card->may_have_dropped_last_frame) {
1524 // Unlike other sources, CEF is not guaranteed to send us a steady
1525 // stream of frames, so we'll have to ask it to repaint the frame
1526 // we dropped. (may_have_dropped_last_frame is set whenever we
1527 // trim the queue completely away, and cleared when we actually
1528 // get a new frame.)
1529 ((CEFCapture *)card->capture.get())->request_new_frame(/*ignore_if_locked=*/true);
1533 new_frames[card_index] = move(card->new_frames.front());
1534 has_new_frame[card_index] = true;
1535 card->new_frames.pop_front();
1536 card->new_frames_changed.notify_all();
1539 raw_audio[card_index] = move(card->new_raw_audio);
1543 // Pretend the frame happened a while ago and was only processed now,
1544 // so that we get the duration sort-of right. This isn't ideal.
1545 output_frame_info.dropped_frames = 0; // Hard to define, really.
1546 output_frame_info.frame_duration = lrint(TIMEBASE * duration<double>(master_card_timeout).count());
1547 output_frame_info.frame_timestamp = steady_clock::now() - master_card_timeout;
1548 } else if (!master_card_is_output) {
1549 output_frame_info.frame_timestamp = new_frames[master_card_index].received_timestamp;
1550 output_frame_info.dropped_frames = new_frames[master_card_index].dropped_frames;
1551 output_frame_info.frame_duration = new_frames[master_card_index].length;
1554 if (!output_frame_info.is_preroll) {
1555 output_jitter_history.frame_arrived(output_frame_info.frame_timestamp, output_frame_info.frame_duration, output_frame_info.dropped_frames);
1558 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
1559 CaptureCard *card = &cards[card_index];
1560 if (has_new_frame[card_index] &&
1561 !input_card_is_master_clock(card_index, master_card_index) &&
1562 !output_frame_info.is_preroll) {
1563 card->queue_length_policy.update_policy(
1564 output_frame_info.frame_timestamp,
1565 card->jitter_history.get_expected_next_frame(),
1566 new_frames[master_card_index].length,
1567 output_frame_info.frame_duration,
1568 card->jitter_history.estimate_max_jitter(),
1569 output_jitter_history.estimate_max_jitter());
1570 trim_queue(card, min<int>(global_flags.max_input_queue_frames,
1571 card->queue_length_policy.get_safe_queue_length()));
1575 // This might get off by a fractional sample when changing master card
1576 // between ones with different frame rates, but that's fine.
1577 int64_t num_samples_times_timebase = int64_t(OUTPUT_FREQUENCY) * output_frame_info.frame_duration + fractional_samples;
1578 output_frame_info.num_samples = num_samples_times_timebase / TIMEBASE;
1579 fractional_samples = num_samples_times_timebase % TIMEBASE;
1580 assert(output_frame_info.num_samples >= 0);
1583 DeviceSpec device{InputSourceType::CAPTURE_CARD, master_card_index};
1586 success = audio_mixer->add_silence(device, output_frame_info.num_samples, /*dropped_frames=*/0);
1590 return output_frame_info;
1593 void Mixer::handle_hotplugged_cards()
1595 // Check for cards that have been disconnected since last frame.
1596 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
1597 CaptureCard *card = &cards[card_index];
1598 if (card->capture != nullptr && card->capture->get_disconnected()) {
1599 bool is_active = card_index < unsigned(global_flags.min_num_cards) || cards[card_index].force_active;
1601 fprintf(stderr, "Card %u went away, replacing with a fake card.\n", card_index);
1602 FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio);
1603 configure_card(card_index, capture, CardType::FAKE_CAPTURE, /*output=*/nullptr, /*is_srt_card=*/false);
1604 card->queue_length_policy.reset(card_index);
1605 card->capture->start_bm_capture();
1607 // NOTE: The theme might end up forcing the card back at some later point
1608 // (ie., force_active is false now, but might immediately be true again on
1609 // e.g. the next frame). That should be rare, though, so we don't bother
1610 // adjusting the message.
1611 fprintf(stderr, "Card %u went away, removing. (To keep a fake card, increase --num-cards.)\n", card_index);
1612 theme->remove_card(card_index);
1613 configure_card(card_index, /*capture=*/nullptr, CardType::FAKE_CAPTURE, /*output=*/nullptr, /*is_srt_card=*/false);
1614 card->queue_length_policy.reset(card_index);
1619 // Count how many active cards we already have. Used below to check that we
1620 // don't go past the max_cards limit set by the user. Note that (non-SRT) video
1621 // and HTML “cards” don't count towards this limit.
1622 int num_video_cards = 0;
1623 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
1624 CaptureCard *card = &cards[card_index];
1625 if (card->type == CardType::LIVE_CARD || is_srt_card(card)) {
1630 // Check for cards that have been connected since last frame.
1631 vector<libusb_device *> hotplugged_cards_copy;
1633 vector<int> hotplugged_srt_cards_copy;
1636 lock_guard<mutex> lock(hotplug_mutex);
1637 swap(hotplugged_cards, hotplugged_cards_copy);
1639 swap(hotplugged_srt_cards, hotplugged_srt_cards_copy);
1642 for (libusb_device *new_dev : hotplugged_cards_copy) {
1643 // Look for a fake capture card where we can stick this in.
1644 int free_card_index = -1;
1645 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
1646 if (cards[card_index].is_fake_capture) {
1647 free_card_index = card_index;
1652 if (free_card_index == -1 || num_video_cards >= global_flags.max_num_cards) {
1653 fprintf(stderr, "New card plugged in, but no free slots -- ignoring.\n");
1654 libusb_unref_device(new_dev);
1656 // BMUSBCapture takes ownership.
1657 fprintf(stderr, "New card plugged in, choosing slot %d.\n", free_card_index);
1658 CaptureCard *card = &cards[free_card_index];
1659 BMUSBCapture *capture = new BMUSBCapture(free_card_index, new_dev);
1660 configure_card(free_card_index, capture, CardType::LIVE_CARD, /*output=*/nullptr, /*is_srt_card=*/false);
1661 card->queue_length_policy.reset(free_card_index);
1662 capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, free_card_index));
1663 capture->start_bm_capture();
1668 // Same, for SRT inputs.
1669 for (SRTSOCKET sock : hotplugged_srt_cards_copy) {
1671 int namelen = sizeof(name);
1672 srt_getsockopt(sock, /*ignored=*/0, SRTO_STREAMID, name, &namelen);
1673 string stream_id(name, namelen);
1675 // Look for a fake capture card where we can stick this in.
1676 // Prioritize ones that previously held SRT streams with the
1677 // same stream ID, if any exist -- and it multiple exist,
1678 // take the one that disconnected the last.
1679 int first_free_card_index = -1, last_matching_free_card_index = -1;
1680 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
1681 CaptureCard *card = &cards[card_index];
1682 if (!card->is_fake_capture) {
1685 if (first_free_card_index == -1) {
1686 first_free_card_index = card_index;
1688 if (card->last_srt_stream_id == stream_id &&
1689 (last_matching_free_card_index == -1 ||
1690 card->fake_capture_counter >
1691 cards[last_matching_free_card_index].fake_capture_counter)) {
1692 last_matching_free_card_index = card_index;
1696 const int free_card_index = (last_matching_free_card_index != -1)
1697 ? last_matching_free_card_index : first_free_card_index;
1698 if (free_card_index == -1 || num_video_cards >= global_flags.max_num_cards) {
1699 if (stream_id.empty()) {
1700 stream_id = "no name";
1702 fprintf(stderr, "New SRT stream connected (%s), but no free slots -- ignoring.\n", stream_id.c_str());
1705 // FFmpegCapture takes ownership.
1706 if (stream_id.empty()) {
1707 fprintf(stderr, "New unnamed SRT stream connected, choosing slot %d.\n", free_card_index);
1709 fprintf(stderr, "New SRT stream connected (%s), choosing slot %d.\n", stream_id.c_str(), free_card_index);
1711 CaptureCard *card = &cards[free_card_index];
1712 FFmpegCapture *capture = new FFmpegCapture(sock, stream_id);
1713 capture->set_card_index(free_card_index);
1714 configure_card(free_card_index, capture, CardType::FFMPEG_INPUT, /*output=*/nullptr, /*is_srt_card=*/true);
1715 update_srt_stats(sock, card); // Initial zero stats.
1716 card->last_srt_stream_id = stream_id;
1717 card->queue_length_policy.reset(free_card_index);
1718 capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, free_card_index));
1719 capture->start_bm_capture();
1724 // Finally, newly forced-to-active fake capture cards.
1725 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
1726 CaptureCard *card = &cards[card_index];
1727 if (card->capture == nullptr && card->force_active) {
1728 FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio);
1729 configure_card(card_index, capture, CardType::FAKE_CAPTURE, /*output=*/nullptr, /*is_srt_card=*/false);
1730 card->queue_length_policy.reset(card_index);
1731 card->capture->start_bm_capture();
1737 void Mixer::schedule_audio_resampling_tasks(unsigned dropped_frames, int num_samples_per_frame, int length_per_frame, bool is_preroll, steady_clock::time_point frame_timestamp)
1739 // Resample the audio as needed, including from previously dropped frames.
1740 for (unsigned frame_num = 0; frame_num < dropped_frames + 1; ++frame_num) {
1741 const bool dropped_frame = (frame_num != dropped_frames);
1743 // Signal to the audio thread to process this frame.
1744 // Note that if the frame is a dropped frame, we signal that
1745 // we don't want to use this frame as base for adjusting
1746 // the resampler rate. The reason for this is that the timing
1747 // of these frames is often way too late; they typically don't
1748 // “arrive” before we synthesize them. Thus, we could end up
1749 // in a situation where we have inserted e.g. five audio frames
1750 // into the queue before we then start pulling five of them
1751 // back out. This makes ResamplingQueue overestimate the delay,
1752 // causing undue resampler changes. (We _do_ use the last,
1753 // non-dropped frame; perhaps we should just discard that as well,
1754 // since dropped frames are expected to be rare, and it might be
1755 // better to just wait until we have a slightly more normal situation).
1756 lock_guard<mutex> lock(audio_mutex);
1757 bool adjust_rate = !dropped_frame && !is_preroll;
1758 audio_task_queue.push(AudioTask{pts_int, num_samples_per_frame, adjust_rate, frame_timestamp});
1759 audio_task_queue_changed.notify_one();
1761 if (dropped_frame) {
1762 // For dropped frames, increase the pts. Note that if the format changed
1763 // in the meantime, we have no way of detecting that; we just have to
1764 // assume the frame length is always the same.
1765 pts_int += length_per_frame;
1770 void Mixer::render_one_frame(int64_t duration)
1772 // Determine the time code for this frame before we start rendering.
1773 string timecode_text = timecode_renderer->get_timecode_text(double(pts_int) / TIMEBASE, frame_num);
1774 if (display_timecode_on_stdout) {
1775 printf("Timecode: '%s'\n", timecode_text.c_str());
1778 // Update Y'CbCr settings for all cards.
1780 lock_guard<mutex> lock(card_mutex);
1781 for (unsigned card_index = 0; card_index < MAX_VIDEO_CARDS; ++card_index) {
1782 YCbCrInterpretation *interpretation = &ycbcr_interpretation[card_index];
1783 input_state.ycbcr_coefficients_auto[card_index] = interpretation->ycbcr_coefficients_auto;
1784 input_state.ycbcr_coefficients[card_index] = interpretation->ycbcr_coefficients;
1785 input_state.full_range[card_index] = interpretation->full_range;
1789 // Get the main chain from the theme, and set its state immediately.
1790 Theme::Chain theme_main_chain = theme->get_chain(0, pts(), global_flags.width, global_flags.height, input_state);
1791 EffectChain *chain = theme_main_chain.chain;
1792 theme_main_chain.setup_chain();
1793 //theme_main_chain.chain->enable_phase_timing(true);
1795 // If HDMI/SDI output is active and the user has requested auto mode,
1796 // its mode overrides the existing Y'CbCr setting for the chain.
1797 YCbCrLumaCoefficients ycbcr_output_coefficients;
1798 if (global_flags.ycbcr_auto_coefficients && output_card_index != -1) {
1799 ycbcr_output_coefficients = cards[output_card_index].output->preferred_ycbcr_coefficients();
1801 ycbcr_output_coefficients = global_flags.ycbcr_rec709_coefficients ? YCBCR_REC_709 : YCBCR_REC_601;
1804 // TODO: Reduce the duplication against theme.cpp.
1805 YCbCrFormat output_ycbcr_format;
1806 output_ycbcr_format.chroma_subsampling_x = 1;
1807 output_ycbcr_format.chroma_subsampling_y = 1;
1808 output_ycbcr_format.luma_coefficients = ycbcr_output_coefficients;
1809 output_ycbcr_format.full_range = false;
1810 output_ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
1811 chain->change_ycbcr_output_format(output_ycbcr_format);
1813 // Render main chain. If we're using zerocopy Quick Sync encoding
1814 // (the default case), we take an extra copy of the created outputs,
1815 // so that we can display it back to the screen later (it's less memory
1816 // bandwidth than writing and reading back an RGBA texture, even at 16-bit).
1817 // Ideally, we'd like to avoid taking copies and just use the main textures
1818 // for display as well, but they're just views into VA-API memory and must be
1819 // unmapped during encoding, so we can't use them for display, unfortunately.
1820 GLuint y_tex, cbcr_full_tex, cbcr_tex;
1821 GLuint y_copy_tex, cbcr_copy_tex = 0;
1822 GLuint y_display_tex, cbcr_display_tex;
1823 GLenum y_type = (global_flags.x264_bit_depth > 8) ? GL_R16 : GL_R8;
1824 GLenum cbcr_type = (global_flags.x264_bit_depth > 8) ? GL_RG16 : GL_RG8;
1825 const bool is_zerocopy = video_encoder->is_zerocopy();
1827 cbcr_full_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width, global_flags.height);
1828 y_copy_tex = resource_pool->create_2d_texture(y_type, global_flags.width, global_flags.height);
1829 cbcr_copy_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width / 2, global_flags.height / 2);
1831 y_display_tex = y_copy_tex;
1832 cbcr_display_tex = cbcr_copy_tex;
1834 // y_tex and cbcr_tex will be given by VideoEncoder.
1836 cbcr_full_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width, global_flags.height);
1837 y_tex = resource_pool->create_2d_texture(y_type, global_flags.width, global_flags.height);
1838 cbcr_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width / 2, global_flags.height / 2);
1840 y_display_tex = y_tex;
1841 cbcr_display_tex = cbcr_tex;
1844 const int64_t av_delay = lrint(global_flags.audio_queue_length_ms * 0.001 * TIMEBASE); // Corresponds to the delay in ResamplingQueue.
1845 bool got_frame = video_encoder->begin_frame(pts_int + av_delay, duration, ycbcr_output_coefficients, theme_main_chain.input_frames, &y_tex, &cbcr_tex);
1850 fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex, y_copy_tex);
1852 fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex);
1855 chain->render_to_fbo(fbo, global_flags.width, global_flags.height);
1857 if (display_timecode_in_stream) {
1858 // Render the timecode on top.
1859 timecode_renderer->render_timecode(fbo, timecode_text);
1862 resource_pool->release_fbo(fbo);
1865 chroma_subsampler->subsample_chroma(cbcr_full_tex, global_flags.width, global_flags.height, cbcr_tex, cbcr_copy_tex);
1867 chroma_subsampler->subsample_chroma(cbcr_full_tex, global_flags.width, global_flags.height, cbcr_tex);
1869 if (output_card_index != -1) {
1870 cards[output_card_index].output->send_frame(y_tex, cbcr_full_tex, ycbcr_output_coefficients, theme_main_chain.input_frames, pts_int, duration);
1872 resource_pool->release_2d_texture(cbcr_full_tex);
1874 // Set the right state for the Y' and CbCr textures we use for display.
1875 glBindFramebuffer(GL_FRAMEBUFFER, 0);
1876 glBindTexture(GL_TEXTURE_2D, y_display_tex);
1877 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1878 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1879 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1881 glBindTexture(GL_TEXTURE_2D, cbcr_display_tex);
1882 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1883 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1884 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1886 RefCountedGLsync fence = video_encoder->end_frame();
1888 // The live frame pieces the Y'CbCr texture copies back into RGB and displays them.
1889 // It owns y_display_tex and cbcr_display_tex now (whichever textures they are).
1890 DisplayFrame live_frame;
1891 live_frame.chain = display_chain.get();
1892 live_frame.setup_chain = [this, y_display_tex, cbcr_display_tex]{
1893 display_input->set_texture_num(0, y_display_tex);
1894 display_input->set_texture_num(1, cbcr_display_tex);
1896 live_frame.ready_fence = fence;
1897 live_frame.input_frames = {};
1898 live_frame.temp_textures = { y_display_tex, cbcr_display_tex };
1899 output_channel[OUTPUT_LIVE].output_frame(move(live_frame));
1901 // Set up preview and any additional channels.
1902 for (int i = 1; i < theme->get_num_channels() + 2; ++i) {
1903 DisplayFrame display_frame;
1904 Theme::Chain chain = theme->get_chain(i, pts(), global_flags.width, global_flags.height, input_state); // FIXME: dimensions
1905 display_frame.chain = move(chain.chain);
1906 display_frame.setup_chain = move(chain.setup_chain);
1907 display_frame.ready_fence = fence;
1908 display_frame.input_frames = move(chain.input_frames);
1909 display_frame.temp_textures = {};
1910 output_channel[i].output_frame(move(display_frame));
1914 void Mixer::audio_thread_func()
1916 pthread_setname_np(pthread_self(), "Mixer_Audio");
1918 while (!should_quit) {
1922 unique_lock<mutex> lock(audio_mutex);
1923 audio_task_queue_changed.wait(lock, [this]{ return should_quit || !audio_task_queue.empty(); });
1927 task = audio_task_queue.front();
1928 audio_task_queue.pop();
1931 ResamplingQueue::RateAdjustmentPolicy rate_adjustment_policy =
1932 task.adjust_rate ? ResamplingQueue::ADJUST_RATE : ResamplingQueue::DO_NOT_ADJUST_RATE;
1933 vector<float> samples_out = audio_mixer->get_output(
1934 task.frame_timestamp,
1936 rate_adjustment_policy);
1938 // Send the samples to the sound card, then add them to the output.
1940 alsa->write(samples_out);
1942 if (output_card_index != -1) {
1943 const int64_t av_delay = lrint(global_flags.audio_queue_length_ms * 0.001 * TIMEBASE); // Corresponds to the delay in ResamplingQueue.
1944 cards[output_card_index].output->send_audio(task.pts_int + av_delay, samples_out);
1946 video_encoder->add_audio(task.pts_int, move(samples_out));
1950 void Mixer::release_display_frame(DisplayFrame *frame)
1952 for (GLuint texnum : frame->temp_textures) {
1953 resource_pool->release_2d_texture(texnum);
1955 frame->temp_textures.clear();
1956 frame->ready_fence.reset();
1957 frame->input_frames.clear();
1962 mixer_thread = thread(&Mixer::thread_func, this);
1963 audio_thread = thread(&Mixer::audio_thread_func, this);
1969 audio_task_queue_changed.notify_one();
1970 mixer_thread.join();
1971 audio_thread.join();
1973 if (global_flags.srt_port >= 0) {
1974 // There's seemingly no other reasonable way to wake up the thread
1975 // (libsrt's epoll equivalent is busy-waiting).
1976 int sock = srt_socket(AF_INET6, 0, 0);
1979 memset(&addr, 0, sizeof(addr));
1980 addr.sin6_family = AF_INET6;
1981 addr.sin6_addr = IN6ADDR_LOOPBACK_INIT;
1982 addr.sin6_port = htons(global_flags.srt_port);
1983 srt_connect(sock, (sockaddr *)&addr, sizeof(addr));
1991 void Mixer::transition_clicked(int transition_num)
1993 theme->transition_clicked(transition_num, pts());
1996 void Mixer::channel_clicked(int preview_num)
1998 theme->channel_clicked(preview_num);
2001 YCbCrInterpretation Mixer::get_input_ycbcr_interpretation(unsigned card_index) const
2003 lock_guard<mutex> lock(card_mutex);
2004 return ycbcr_interpretation[card_index];
2007 void Mixer::set_input_ycbcr_interpretation(unsigned card_index, const YCbCrInterpretation &interpretation)
2009 lock_guard<mutex> lock(card_mutex);
2010 ycbcr_interpretation[card_index] = interpretation;
2013 void Mixer::start_mode_scanning(unsigned card_index)
2015 assert(card_index < MAX_VIDEO_CARDS);
2016 if (cards[card_index].capture != nullptr) {
2017 // Inactive card. Should never happen.
2020 if (is_mode_scanning[card_index]) {
2023 is_mode_scanning[card_index] = true;
2024 mode_scanlist[card_index].clear();
2025 for (const auto &mode : cards[card_index].capture->get_available_video_modes()) {
2026 mode_scanlist[card_index].push_back(mode.first);
2028 assert(!mode_scanlist[card_index].empty());
2029 mode_scanlist_index[card_index] = 0;
2030 cards[card_index].capture->set_video_mode(mode_scanlist[card_index][0]);
2031 last_mode_scan_change[card_index] = steady_clock::now();
2034 map<uint32_t, VideoMode> Mixer::get_available_output_video_modes() const
2036 assert(desired_output_card_index != -1);
2037 lock_guard<mutex> lock(card_mutex);
2038 return cards[desired_output_card_index].output->get_available_video_modes();
2041 string Mixer::get_ffmpeg_filename(unsigned card_index) const
2043 assert(card_index < MAX_VIDEO_CARDS);
2044 assert(cards[card_index].type == CardType::FFMPEG_INPUT);
2045 return ((FFmpegCapture *)(cards[card_index].capture.get()))->get_filename();
2048 void Mixer::set_ffmpeg_filename(unsigned card_index, const string &filename) {
2049 assert(card_index < MAX_VIDEO_CARDS);
2050 assert(cards[card_index].type == CardType::FFMPEG_INPUT);
2051 ((FFmpegCapture *)(cards[card_index].capture.get()))->change_filename(filename);
2054 void Mixer::wait_for_next_frame()
2056 unique_lock<mutex> lock(frame_num_mutex);
2057 unsigned old_frame_num = frame_num;
2058 frame_num_updated.wait_for(lock, seconds(1), // Timeout is just in case.
2059 [old_frame_num, this]{ return this->frame_num > old_frame_num; });
2062 Mixer::OutputChannel::~OutputChannel()
2064 if (has_current_frame) {
2065 parent->release_display_frame(¤t_frame);
2067 if (has_ready_frame) {
2068 parent->release_display_frame(&ready_frame);
2072 void Mixer::OutputChannel::output_frame(DisplayFrame &&frame)
2074 // Store this frame for display. Remove the ready frame if any
2075 // (it was seemingly never used).
2077 lock_guard<mutex> lock(frame_mutex);
2078 if (has_ready_frame) {
2079 parent->release_display_frame(&ready_frame);
2081 ready_frame = move(frame);
2082 has_ready_frame = true;
2084 // Call the callbacks under the mutex (they should be short),
2085 // so that we don't race against a callback removal.
2086 for (const auto &key_and_callback : new_frame_ready_callbacks) {
2087 key_and_callback.second();
2091 // Reduce the number of callbacks by filtering duplicates. The reason
2092 // why we bother doing this is that Qt seemingly can get into a state
2093 // where its builds up an essentially unbounded queue of signals,
2094 // consuming more and more memory, and there's no good way of collapsing
2095 // user-defined signals or limiting the length of the queue.
2096 if (transition_names_updated_callback) {
2097 vector<string> transition_names = global_mixer->get_transition_names();
2098 bool changed = false;
2099 if (transition_names.size() != last_transition_names.size()) {
2102 for (unsigned i = 0; i < transition_names.size(); ++i) {
2103 if (transition_names[i] != last_transition_names[i]) {
2110 transition_names_updated_callback(transition_names);
2111 last_transition_names = transition_names;
2114 if (name_updated_callback) {
2115 string name = global_mixer->get_channel_name(channel);
2116 if (name != last_name) {
2117 name_updated_callback(name);
2121 if (color_updated_callback) {
2122 string color = global_mixer->get_channel_color(channel);
2123 if (color != last_color) {
2124 color_updated_callback(color);
2130 bool Mixer::OutputChannel::get_display_frame(DisplayFrame *frame)
2132 lock_guard<mutex> lock(frame_mutex);
2133 if (!has_current_frame && !has_ready_frame) {
2137 if (has_current_frame && has_ready_frame) {
2138 // We have a new ready frame. Toss the current one.
2139 parent->release_display_frame(¤t_frame);
2140 has_current_frame = false;
2142 if (has_ready_frame) {
2143 assert(!has_current_frame);
2144 current_frame = move(ready_frame);
2145 ready_frame.ready_fence.reset(); // Drop the refcount.
2146 ready_frame.input_frames.clear(); // Drop the refcounts.
2147 has_current_frame = true;
2148 has_ready_frame = false;
2151 *frame = current_frame;
2155 void Mixer::OutputChannel::add_frame_ready_callback(void *key, Mixer::new_frame_ready_callback_t callback)
2157 lock_guard<mutex> lock(frame_mutex);
2158 new_frame_ready_callbacks[key] = callback;
2161 void Mixer::OutputChannel::remove_frame_ready_callback(void *key)
2163 lock_guard<mutex> lock(frame_mutex);
2164 new_frame_ready_callbacks.erase(key);
2167 void Mixer::OutputChannel::set_transition_names_updated_callback(Mixer::transition_names_updated_callback_t callback)
2169 transition_names_updated_callback = callback;
2172 void Mixer::OutputChannel::set_name_updated_callback(Mixer::name_updated_callback_t callback)
2174 name_updated_callback = callback;
2177 void Mixer::OutputChannel::set_color_updated_callback(Mixer::color_updated_callback_t callback)
2179 color_updated_callback = callback;
2183 void Mixer::start_srt()
2185 SRTSOCKET sock = srt_socket(AF_INET6, 0, 0);
2187 memset(&addr, 0, sizeof(addr));
2188 addr.sin6_family = AF_INET6;
2189 addr.sin6_port = htons(global_flags.srt_port);
2191 int err = srt_bind(sock, (sockaddr *)&addr, sizeof(addr));
2193 fprintf(stderr, "srt_bind: %s\n", srt_getlasterror_str());
2196 err = srt_listen(sock, MAX_VIDEO_CARDS);
2198 fprintf(stderr, "srt_listen: %s\n", srt_getlasterror_str());
2202 srt_thread = thread([this, sock] {
2205 int sa_len = sizeof(addr);
2206 int clientsock = srt_accept(sock, (sockaddr *)&addr, &sa_len);
2208 if (clientsock != -1) {
2209 srt_close(clientsock);
2213 if (!global_flags.enable_srt) { // Runtime UI toggle.
2214 // Perhaps not as good as never listening in the first place,
2215 // but much simpler to turn on and off.
2216 srt_close(clientsock);
2219 lock_guard<mutex> lock(hotplug_mutex);
2220 hotplugged_srt_cards.push_back(clientsock);
2228 void Mixer::update_srt_stats(int srt_sock, Mixer::CaptureCard *card)
2230 SRT_TRACEBSTATS stats;
2231 srt_bistats(srt_sock, &stats, /*clear=*/0, /*instantaneous=*/1);
2233 card->metric_srt_uptime_seconds = stats.msTimeStamp * 1e-3;
2234 card->metric_srt_send_duration_seconds = stats.usSndDurationTotal * 1e-6;
2235 card->metric_srt_sent_bytes = stats.byteSentTotal;
2236 card->metric_srt_received_bytes = stats.byteRecvTotal;
2237 card->metric_srt_sent_packets_normal = stats.pktSentTotal;
2238 card->metric_srt_received_packets_normal = stats.pktRecvTotal;
2239 card->metric_srt_sent_packets_lost = stats.pktSndLossTotal;
2240 card->metric_srt_received_packets_lost = stats.pktRcvLossTotal;
2241 card->metric_srt_sent_packets_retransmitted = stats.pktRetransTotal;
2242 card->metric_srt_sent_bytes_retransmitted = stats.byteRetransTotal;
2243 card->metric_srt_sent_packets_ack = stats.pktSentACKTotal;
2244 card->metric_srt_received_packets_ack = stats.pktRecvACKTotal;
2245 card->metric_srt_sent_packets_nak = stats.pktSentNAKTotal;
2246 card->metric_srt_received_packets_nak = stats.pktRecvNAKTotal;
2247 card->metric_srt_sent_packets_dropped = stats.pktSndDropTotal;
2248 card->metric_srt_received_packets_dropped = stats.pktRcvDropTotal;
2249 card->metric_srt_sent_bytes_dropped = stats.byteSndDropTotal;
2250 card->metric_srt_received_bytes_dropped = stats.byteRcvDropTotal;
2251 card->metric_srt_received_packets_undecryptable = stats.pktRcvUndecryptTotal;
2252 card->metric_srt_received_bytes_undecryptable = stats.byteRcvUndecryptTotal;
2253 card->metric_srt_filter_sent_packets = stats.pktSndFilterExtraTotal;
2254 card->metric_srt_filter_received_extra_packets = stats.pktRcvFilterExtraTotal;
2255 card->metric_srt_filter_received_rebuilt_packets = stats.pktRcvFilterSupplyTotal;
2256 card->metric_srt_filter_received_lost_packets = stats.pktRcvFilterLossTotal;
2259 card->metric_srt_packet_sending_period_seconds = stats.usPktSndPeriod * 1e-6;
2260 card->metric_srt_flow_window_packets = stats.pktFlowWindow;
2261 card->metric_srt_congestion_window_packets = stats.pktCongestionWindow;
2262 card->metric_srt_flight_size_packets = stats.pktFlightSize;
2263 card->metric_srt_rtt_seconds = stats.msRTT * 1e-3;
2264 card->metric_srt_estimated_bandwidth_bits_per_second = stats.mbpsBandwidth * 1e6;
2265 card->metric_srt_bandwidth_ceiling_bits_per_second = stats.mbpsMaxBW * 1e6;
2266 card->metric_srt_send_buffer_available_bytes = stats.byteAvailSndBuf;
2267 card->metric_srt_receive_buffer_available_bytes = stats.byteAvailRcvBuf;
2268 card->metric_srt_mss_bytes = stats.byteMSS;
2269 card->metric_srt_sender_unacked_packets = stats.pktSndBuf;
2270 card->metric_srt_sender_unacked_bytes = stats.byteSndBuf;
2271 card->metric_srt_sender_unacked_timespan_seconds = stats.msSndBuf * 1e-3;
2272 card->metric_srt_sender_delivery_delay_seconds = stats.msSndTsbPdDelay * 1e-3;
2273 card->metric_srt_receiver_unacked_packets = stats.pktRcvBuf;
2274 card->metric_srt_receiver_unacked_bytes = stats.byteRcvBuf;
2275 card->metric_srt_receiver_unacked_timespan_seconds = stats.msRcvBuf * 1e-3;
2276 card->metric_srt_receiver_delivery_delay_seconds = stats.msRcvTsbPdDelay * 1e-3;
2280 string Mixer::description_for_card(unsigned card_index)
2282 CaptureCard *card = &cards[card_index];
2283 if (card->capture == nullptr) {
2284 // Should never be called for inactive cards, but OK.
2286 snprintf(buf, sizeof(buf), "Inactive capture card %u", card_index);
2289 if (card->type != CardType::FFMPEG_INPUT) {
2291 snprintf(buf, sizeof(buf), "Capture card %u (%s)", card_index, card->capture->get_description().c_str());
2295 // Number (non-SRT) FFmpeg inputs from zero, separately from the capture cards,
2296 // since it's not too obvious for the user that they are “cards”.
2297 unsigned ffmpeg_index = 0;
2298 for (unsigned i = 0; i < card_index; ++i) {
2299 CaptureCard *other_card = &cards[i];
2300 if (other_card->type == CardType::FFMPEG_INPUT && !is_srt_card(other_card)) {
2305 snprintf(buf, sizeof(buf), "Video input %u (%s)", ffmpeg_index, card->capture->get_description().c_str());
2309 bool Mixer::is_srt_card(const Mixer::CaptureCard *card)
2312 if (card->type == CardType::FFMPEG_INPUT) {
2313 int srt_sock = static_cast<FFmpegCapture *>(card->capture.get())->get_srt_sock();
2314 return srt_sock != -1;
2320 mutex RefCountedGLsync::fence_lock;