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 "mjpeg_encoder.h"
52 #include "pbo_frame_allocator.h"
53 #include "shared/ref_counted_gl_sync.h"
54 #include "resampling_queue.h"
55 #include "shared/timebase.h"
56 #include "timecode_renderer.h"
57 #include "v210_converter.h"
58 #include "va_display_with_cleanup.h"
59 #include "video_encoder.h"
62 #include <google/protobuf/util/json_util.h>
68 using namespace movit;
70 using namespace std::chrono;
71 using namespace std::placeholders;
72 using namespace bmusb;
74 Mixer *global_mixer = nullptr;
78 void insert_new_frame(RefCountedFrame frame, unsigned field_num, bool interlaced, unsigned card_index, InputState *input_state)
81 for (unsigned frame_num = FRAME_HISTORY_LENGTH; frame_num --> 1; ) { // :-)
82 input_state->buffered_frames[card_index][frame_num] =
83 input_state->buffered_frames[card_index][frame_num - 1];
85 input_state->buffered_frames[card_index][0] = { frame, field_num };
87 for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
88 input_state->buffered_frames[card_index][frame_num] = { frame, field_num };
93 void ensure_texture_resolution(PBOFrameAllocator::Userdata *userdata, unsigned field, unsigned width, unsigned height, unsigned cbcr_width, unsigned cbcr_height, unsigned v210_width)
96 switch (userdata->pixel_format) {
97 case PixelFormat_10BitYCbCr:
98 first = userdata->tex_v210[field] == 0 || userdata->tex_444[field] == 0;
100 case PixelFormat_8BitYCbCr:
101 first = userdata->tex_y[field] == 0 || userdata->tex_cbcr[field] == 0;
103 case PixelFormat_8BitBGRA:
104 first = userdata->tex_rgba[field] == 0;
106 case PixelFormat_8BitYCbCrPlanar:
107 first = userdata->tex_y[field] == 0 || userdata->tex_cb[field] == 0 || userdata->tex_cr[field] == 0;
113 const bool recreate_main_texture =
115 width != userdata->last_width[field] ||
116 height != userdata->last_height[field] ||
117 cbcr_width != userdata->last_cbcr_width[field] ||
118 cbcr_height != userdata->last_cbcr_height[field];
119 const bool recreate_v210_texture =
120 global_flags.ten_bit_input &&
121 (first || v210_width != userdata->last_v210_width[field] || height != userdata->last_height[field]);
123 if (recreate_main_texture) {
124 // We changed resolution since last use of this texture, so we need to create
125 // a new object. Note that this each card has its own PBOFrameAllocator,
126 // we don't need to worry about these flip-flopping between resolutions.
127 switch (userdata->pixel_format) {
128 case PixelFormat_10BitYCbCr:
129 glBindTexture(GL_TEXTURE_2D, userdata->tex_444[field]);
131 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, nullptr);
134 case PixelFormat_8BitYCbCr: {
135 glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
137 glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, cbcr_width, height, 0, GL_RG, GL_UNSIGNED_BYTE, nullptr);
139 glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
141 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
145 case PixelFormat_8BitYCbCrPlanar: {
146 glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
148 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
150 glBindTexture(GL_TEXTURE_2D, userdata->tex_cb[field]);
152 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, cbcr_width, cbcr_height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
154 glBindTexture(GL_TEXTURE_2D, userdata->tex_cr[field]);
156 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, cbcr_width, cbcr_height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
160 case PixelFormat_8BitBGRA:
161 glBindTexture(GL_TEXTURE_2D, userdata->tex_rgba[field]);
163 // NOTE: sRGB may be disabled by sRGBSwitchingFlatInput.
164 glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8_ALPHA8, width, height, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, nullptr);
170 userdata->last_width[field] = width;
171 userdata->last_height[field] = height;
172 userdata->last_cbcr_width[field] = cbcr_width;
173 userdata->last_cbcr_height[field] = cbcr_height;
175 if (recreate_v210_texture) {
176 // Same as above; we need to recreate the texture.
177 glBindTexture(GL_TEXTURE_2D, userdata->tex_v210[field]);
179 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, v210_width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, nullptr);
181 userdata->last_v210_width[field] = v210_width;
182 userdata->last_height[field] = height;
186 void upload_texture(GLuint tex, GLuint width, GLuint height, GLuint stride, bool interlaced_stride, GLenum format, GLenum type, GLintptr offset)
188 if (interlaced_stride) {
191 if (global_flags.flush_pbos) {
192 glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, offset, stride * height);
196 glBindTexture(GL_TEXTURE_2D, tex);
198 if (interlaced_stride) {
199 glPixelStorei(GL_UNPACK_ROW_LENGTH, width * 2);
202 glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
206 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, BUFFER_OFFSET(offset));
208 glBindTexture(GL_TEXTURE_2D, 0);
210 glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
216 void JitterHistory::register_metrics(const vector<pair<string, string>> &labels)
218 global_metrics.add("input_underestimated_jitter_frames", labels, &metric_input_underestimated_jitter_frames);
219 global_metrics.add("input_estimated_max_jitter_seconds", labels, &metric_input_estimated_max_jitter_seconds, Metrics::TYPE_GAUGE);
222 void JitterHistory::unregister_metrics(const vector<pair<string, string>> &labels)
224 global_metrics.remove("input_underestimated_jitter_frames", labels);
225 global_metrics.remove("input_estimated_max_jitter_seconds", labels);
228 void JitterHistory::frame_arrived(steady_clock::time_point now, int64_t frame_duration, size_t dropped_frames)
230 if (expected_timestamp > steady_clock::time_point::min()) {
231 expected_timestamp += dropped_frames * nanoseconds(frame_duration * 1000000000 / TIMEBASE);
232 double jitter_seconds = fabs(duration<double>(expected_timestamp - now).count());
233 history.push_back(orders.insert(jitter_seconds));
234 if (jitter_seconds > estimate_max_jitter()) {
235 ++metric_input_underestimated_jitter_frames;
238 metric_input_estimated_max_jitter_seconds = estimate_max_jitter();
240 if (history.size() > history_length) {
241 orders.erase(history.front());
244 assert(history.size() <= history_length);
246 expected_timestamp = now + nanoseconds(frame_duration * 1000000000 / TIMEBASE);
249 double JitterHistory::estimate_max_jitter() const
251 if (orders.empty()) {
254 size_t elem_idx = lrint((orders.size() - 1) * percentile);
255 if (percentile <= 0.5) {
256 return *next(orders.begin(), elem_idx) * multiplier;
258 return *prev(orders.end(), orders.size() - elem_idx) * multiplier;
262 void QueueLengthPolicy::register_metrics(const vector<pair<string, string>> &labels)
264 global_metrics.add("input_queue_safe_length_frames", labels, &metric_input_queue_safe_length_frames, Metrics::TYPE_GAUGE);
267 void QueueLengthPolicy::unregister_metrics(const vector<pair<string, string>> &labels)
269 global_metrics.remove("input_queue_safe_length_frames", labels);
272 void QueueLengthPolicy::update_policy(steady_clock::time_point now,
273 steady_clock::time_point expected_next_frame,
274 int64_t input_frame_duration,
275 int64_t master_frame_duration,
276 double max_input_card_jitter_seconds,
277 double max_master_card_jitter_seconds)
279 double input_frame_duration_seconds = input_frame_duration / double(TIMEBASE);
280 double master_frame_duration_seconds = master_frame_duration / double(TIMEBASE);
282 // Figure out when we can expect the next frame for this card, assuming
283 // worst-case jitter (ie., the frame is maximally late).
284 double seconds_until_next_frame = max(duration<double>(expected_next_frame - now).count() + max_input_card_jitter_seconds, 0.0);
286 // How many times are the master card expected to tick in that time?
287 // We assume the master clock has worst-case jitter but not any rate
288 // discrepancy, ie., it ticks as early as possible every time, but not
290 double frames_needed = (seconds_until_next_frame + max_master_card_jitter_seconds) / master_frame_duration_seconds;
292 // As a special case, if the master card ticks faster than the input card,
293 // we expect the queue to drain by itself even without dropping. But if
294 // the difference is small (e.g. 60 Hz master and 59.94 input), it would
295 // go slowly enough that the effect wouldn't really be appreciable.
296 // We account for this by looking at the situation five frames ahead,
297 // assuming everything else is the same.
298 double frames_allowed;
299 if (master_frame_duration < input_frame_duration) {
300 frames_allowed = frames_needed + 5 * (input_frame_duration_seconds - master_frame_duration_seconds) / master_frame_duration_seconds;
302 frames_allowed = frames_needed;
305 safe_queue_length = max<int>(floor(frames_allowed), 0);
306 metric_input_queue_safe_length_frames = safe_queue_length;
309 Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards)
311 num_cards(num_cards),
312 mixer_surface(create_surface(format)),
313 h264_encoder_surface(create_surface(format)),
314 decklink_output_surface(create_surface(format)),
315 image_update_surface(create_surface(format))
317 memcpy(ycbcr_interpretation, global_flags.ycbcr_interpretation, sizeof(ycbcr_interpretation));
318 CHECK(init_movit(MOVIT_SHADER_DIR, MOVIT_DEBUG_OFF));
321 if (!epoxy_has_gl_extension("GL_EXT_texture_sRGB_decode") ||
322 !epoxy_has_gl_extension("GL_ARB_sampler_objects")) {
323 fprintf(stderr, "Nageru requires GL_EXT_texture_sRGB_decode and GL_ARB_sampler_objects to run.\n");
327 // Since we allow non-bouncing 4:2:2 YCbCrInputs, effective subpixel precision
328 // will be halved when sampling them, and we need to compensate here.
329 movit_texel_subpixel_precision /= 2.0;
331 resource_pool.reset(new ResourcePool);
332 for (unsigned i = 0; i < NUM_OUTPUTS; ++i) {
333 output_channel[i].parent = this;
334 output_channel[i].channel = i;
337 ImageFormat inout_format;
338 inout_format.color_space = COLORSPACE_sRGB;
339 inout_format.gamma_curve = GAMMA_sRGB;
341 // Matches the 4:2:0 format created by the main chain.
342 YCbCrFormat ycbcr_format;
343 ycbcr_format.chroma_subsampling_x = 2;
344 ycbcr_format.chroma_subsampling_y = 2;
345 if (global_flags.ycbcr_rec709_coefficients) {
346 ycbcr_format.luma_coefficients = YCBCR_REC_709;
348 ycbcr_format.luma_coefficients = YCBCR_REC_601;
350 ycbcr_format.full_range = false;
351 ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
352 ycbcr_format.cb_x_position = 0.0f;
353 ycbcr_format.cr_x_position = 0.0f;
354 ycbcr_format.cb_y_position = 0.5f;
355 ycbcr_format.cr_y_position = 0.5f;
357 // Initialize the neutral colors to sane values.
358 for (unsigned i = 0; i < MAX_VIDEO_CARDS; ++i) {
359 last_received_neutral_color[i] = RGBTriplet(1.0f, 1.0f, 1.0f);
362 // Display chain; shows the live output produced by the main chain (or rather, a copy of it).
363 display_chain.reset(new EffectChain(global_flags.width, global_flags.height, resource_pool.get()));
365 GLenum type = global_flags.x264_bit_depth > 8 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
366 display_input = new YCbCrInput(inout_format, ycbcr_format, global_flags.width, global_flags.height, YCBCR_INPUT_SPLIT_Y_AND_CBCR, type);
367 display_chain->add_input(display_input);
368 display_chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
369 display_chain->set_dither_bits(0); // Don't bother.
370 display_chain->finalize();
372 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));
373 if (!global_flags.card_to_mjpeg_stream_export.empty()) {
374 mjpeg_encoder.reset(new MJPEGEncoder(&httpd, global_flags.va_display));
377 // Must be instantiated after VideoEncoder has initialized global_flags.use_zerocopy.
378 theme.reset(new Theme(global_flags.theme_filename, global_flags.theme_dirs, resource_pool.get(), num_cards));
380 // Must be instantiated after the theme, as the theme decides the number of FFmpeg inputs.
381 std::vector<FFmpegCapture *> video_inputs = theme->get_video_inputs();
382 audio_mixer.reset(new AudioMixer(num_cards, video_inputs.size()));
384 httpd.add_endpoint("/channels", bind(&Mixer::get_channels_json, this), HTTPD::ALLOW_ALL_ORIGINS);
385 for (int channel_idx = 0; channel_idx < theme->get_num_channels(); ++channel_idx) {
387 snprintf(url, sizeof(url), "/channels/%d/color", channel_idx + 2);
388 httpd.add_endpoint(url, bind(&Mixer::get_channel_color_http, this, unsigned(channel_idx + 2)), HTTPD::ALLOW_ALL_ORIGINS);
391 // Start listening for clients only once VideoEncoder has written its header, if any.
392 httpd.start(global_flags.http_port);
394 // First try initializing the then PCI devices, then USB, then
395 // fill up with fake cards until we have the desired number of cards.
396 unsigned num_pci_devices = 0;
397 unsigned card_index = 0;
400 IDeckLinkIterator *decklink_iterator = CreateDeckLinkIteratorInstance();
401 if (decklink_iterator != nullptr) {
402 for ( ; card_index < num_cards; ++card_index) {
404 if (decklink_iterator->Next(&decklink) != S_OK) {
408 DeckLinkCapture *capture = new DeckLinkCapture(decklink, card_index);
409 DeckLinkOutput *output = new DeckLinkOutput(resource_pool.get(), decklink_output_surface, global_flags.width, global_flags.height, card_index);
410 if (!output->set_device(decklink)) {
414 configure_card(card_index, capture, CardType::LIVE_CARD, output);
417 decklink_iterator->Release();
418 fprintf(stderr, "Found %u DeckLink PCI card(s).\n", num_pci_devices);
420 fprintf(stderr, "DeckLink drivers not found. Probing for USB cards only.\n");
424 unsigned num_usb_devices = BMUSBCapture::num_cards();
425 for (unsigned usb_card_index = 0; usb_card_index < num_usb_devices && card_index < num_cards; ++usb_card_index, ++card_index) {
426 BMUSBCapture *capture = new BMUSBCapture(usb_card_index);
427 capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, card_index));
428 configure_card(card_index, capture, CardType::LIVE_CARD, /*output=*/nullptr);
430 fprintf(stderr, "Found %u USB card(s).\n", num_usb_devices);
432 unsigned num_fake_cards = 0;
433 for ( ; card_index < num_cards; ++card_index, ++num_fake_cards) {
434 FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio);
435 configure_card(card_index, capture, CardType::FAKE_CAPTURE, /*output=*/nullptr);
438 if (num_fake_cards > 0) {
439 fprintf(stderr, "Initialized %u fake cards.\n", num_fake_cards);
442 // Initialize all video inputs the theme asked for. Note that these are
443 // all put _after_ the regular cards, which stop at <num_cards> - 1.
444 for (unsigned video_card_index = 0; video_card_index < video_inputs.size(); ++card_index, ++video_card_index) {
445 if (card_index >= MAX_VIDEO_CARDS) {
446 fprintf(stderr, "ERROR: Not enough card slots available for the videos the theme requested.\n");
449 configure_card(card_index, video_inputs[video_card_index], CardType::FFMPEG_INPUT, /*output=*/nullptr);
450 video_inputs[video_card_index]->set_card_index(card_index);
452 num_video_inputs = video_inputs.size();
455 // Same, for HTML inputs.
456 std::vector<CEFCapture *> html_inputs = theme->get_html_inputs();
457 for (unsigned html_card_index = 0; html_card_index < html_inputs.size(); ++card_index, ++html_card_index) {
458 if (card_index >= MAX_VIDEO_CARDS) {
459 fprintf(stderr, "ERROR: Not enough card slots available for the HTML inputs the theme requested.\n");
462 configure_card(card_index, html_inputs[html_card_index], CardType::CEF_INPUT, /*output=*/nullptr);
463 html_inputs[html_card_index]->set_card_index(card_index);
465 num_html_inputs = html_inputs.size();
468 BMUSBCapture::set_card_connected_callback(bind(&Mixer::bm_hotplug_add, this, _1));
469 BMUSBCapture::start_bm_thread();
471 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
472 cards[card_index].queue_length_policy.reset(card_index);
475 chroma_subsampler.reset(new ChromaSubsampler(resource_pool.get()));
477 if (global_flags.ten_bit_input) {
478 if (!v210Converter::has_hardware_support()) {
479 fprintf(stderr, "ERROR: --ten-bit-input requires support for OpenGL compute shaders\n");
480 fprintf(stderr, " (OpenGL 4.3, or GL_ARB_compute_shader + GL_ARB_shader_image_load_store).\n");
483 v210_converter.reset(new v210Converter());
485 // These are all the widths listed in the Blackmagic SDK documentation
486 // (section 2.7.3, “Display Modes”).
487 v210_converter->precompile_shader(720);
488 v210_converter->precompile_shader(1280);
489 v210_converter->precompile_shader(1920);
490 v210_converter->precompile_shader(2048);
491 v210_converter->precompile_shader(3840);
492 v210_converter->precompile_shader(4096);
494 if (global_flags.ten_bit_output) {
495 if (!v210Converter::has_hardware_support()) {
496 fprintf(stderr, "ERROR: --ten-bit-output requires support for OpenGL compute shaders\n");
497 fprintf(stderr, " (OpenGL 4.3, or GL_ARB_compute_shader + GL_ARB_shader_image_load_store).\n");
502 timecode_renderer.reset(new TimecodeRenderer(resource_pool.get(), global_flags.width, global_flags.height));
503 display_timecode_in_stream = global_flags.display_timecode_in_stream;
504 display_timecode_on_stdout = global_flags.display_timecode_on_stdout;
506 if (global_flags.enable_alsa_output) {
507 alsa.reset(new ALSAOutput(OUTPUT_FREQUENCY, /*num_channels=*/2));
509 if (global_flags.output_card != -1) {
510 desired_output_card_index = global_flags.output_card;
511 set_output_card_internal(global_flags.output_card);
514 output_jitter_history.register_metrics({{ "card", "output" }});
516 ImageInput::start_update_thread(image_update_surface);
521 ImageInput::end_update_thread();
523 if (mjpeg_encoder != nullptr) {
524 mjpeg_encoder->stop();
527 BMUSBCapture::stop_bm_thread();
529 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
530 cards[card_index].capture->stop_dequeue_thread();
531 if (cards[card_index].output) {
532 cards[card_index].output->end_output();
533 cards[card_index].output.reset();
537 video_encoder.reset(nullptr);
540 void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, CardType card_type, DeckLinkOutput *output)
542 printf("Configuring card %d...\n", card_index);
544 CaptureCard *card = &cards[card_index];
545 if (card->capture != nullptr) {
546 card->capture->stop_dequeue_thread();
548 card->capture.reset(capture);
549 card->is_fake_capture = (card_type == CardType::FAKE_CAPTURE);
550 card->is_cef_capture = (card_type == CardType::CEF_INPUT);
551 card->may_have_dropped_last_frame = false;
552 card->type = card_type;
553 if (card->output.get() != output) {
554 card->output.reset(output);
557 PixelFormat pixel_format;
558 if (card_type == CardType::FFMPEG_INPUT) {
559 pixel_format = capture->get_current_pixel_format();
560 } else if (card_type == CardType::CEF_INPUT) {
561 pixel_format = PixelFormat_8BitBGRA;
562 } else if (global_flags.ten_bit_input) {
563 pixel_format = PixelFormat_10BitYCbCr;
565 pixel_format = PixelFormat_8BitYCbCr;
568 card->capture->set_frame_callback(bind(&Mixer::bm_frame, this, card_index, _1, _2, _3, _4, _5, _6, _7));
569 if (card->frame_allocator == nullptr) {
570 card->frame_allocator.reset(new PBOFrameAllocator(pixel_format, 8 << 20, global_flags.width, global_flags.height, card_index, mjpeg_encoder.get())); // 8 MB.
572 // The format could have changed, but we cannot reset the allocator
573 // and create a new one from scratch, since there may be allocated
574 // frames from it that expect to call release_frame() on it.
575 // Instead, ask the allocator to create new frames for us and discard
576 // any old ones as they come back. This takes the mutex while
577 // allocating, but nothing should really be sending frames in there
578 // right now anyway (start_bm_capture() has not been called yet).
579 card->frame_allocator->reconfigure(pixel_format, 8 << 20, global_flags.width, global_flags.height, card_index, mjpeg_encoder.get());
581 card->capture->set_video_frame_allocator(card->frame_allocator.get());
582 if (card->surface == nullptr) {
583 card->surface = create_surface_with_same_format(mixer_surface);
585 while (!card->new_frames.empty()) card->new_frames.pop_front();
586 card->last_timecode = -1;
587 card->capture->set_pixel_format(pixel_format);
588 card->capture->configure_card();
590 // NOTE: start_bm_capture() happens in thread_func().
593 if (card_type == CardType::FFMPEG_INPUT) {
594 device = DeviceSpec{InputSourceType::FFMPEG_VIDEO_INPUT, card_index - num_cards};
596 device = DeviceSpec{InputSourceType::CAPTURE_CARD, card_index};
598 audio_mixer->reset_resampler(device);
599 audio_mixer->set_display_name(device, card->capture->get_description());
600 audio_mixer->trigger_state_changed_callback();
602 // Unregister old metrics, if any.
603 if (!card->labels.empty()) {
604 const vector<pair<string, string>> &labels = card->labels;
605 card->jitter_history.unregister_metrics(labels);
606 card->queue_length_policy.unregister_metrics(labels);
607 global_metrics.remove("input_received_frames", labels);
608 global_metrics.remove("input_dropped_frames_jitter", labels);
609 global_metrics.remove("input_dropped_frames_error", labels);
610 global_metrics.remove("input_dropped_frames_resets", labels);
611 global_metrics.remove("input_queue_length_frames", labels);
612 global_metrics.remove("input_queue_duped_frames", labels);
614 global_metrics.remove("input_has_signal_bool", labels);
615 global_metrics.remove("input_is_connected_bool", labels);
616 global_metrics.remove("input_interlaced_bool", labels);
617 global_metrics.remove("input_width_pixels", labels);
618 global_metrics.remove("input_height_pixels", labels);
619 global_metrics.remove("input_frame_rate_nom", labels);
620 global_metrics.remove("input_frame_rate_den", labels);
621 global_metrics.remove("input_sample_rate_hz", labels);
625 vector<pair<string, string>> labels;
627 snprintf(card_name, sizeof(card_name), "%d", card_index);
628 labels.emplace_back("card", card_name);
631 case CardType::LIVE_CARD:
632 labels.emplace_back("cardtype", "live");
634 case CardType::FAKE_CAPTURE:
635 labels.emplace_back("cardtype", "fake");
637 case CardType::FFMPEG_INPUT:
638 labels.emplace_back("cardtype", "ffmpeg");
640 case CardType::CEF_INPUT:
641 labels.emplace_back("cardtype", "cef");
646 card->jitter_history.register_metrics(labels);
647 card->queue_length_policy.register_metrics(labels);
648 global_metrics.add("input_received_frames", labels, &card->metric_input_received_frames);
649 global_metrics.add("input_dropped_frames_jitter", labels, &card->metric_input_dropped_frames_jitter);
650 global_metrics.add("input_dropped_frames_error", labels, &card->metric_input_dropped_frames_error);
651 global_metrics.add("input_dropped_frames_resets", labels, &card->metric_input_resets);
652 global_metrics.add("input_queue_length_frames", labels, &card->metric_input_queue_length_frames, Metrics::TYPE_GAUGE);
653 global_metrics.add("input_queue_duped_frames", labels, &card->metric_input_duped_frames);
655 global_metrics.add("input_has_signal_bool", labels, &card->metric_input_has_signal_bool, Metrics::TYPE_GAUGE);
656 global_metrics.add("input_is_connected_bool", labels, &card->metric_input_is_connected_bool, Metrics::TYPE_GAUGE);
657 global_metrics.add("input_interlaced_bool", labels, &card->metric_input_interlaced_bool, Metrics::TYPE_GAUGE);
658 global_metrics.add("input_width_pixels", labels, &card->metric_input_width_pixels, Metrics::TYPE_GAUGE);
659 global_metrics.add("input_height_pixels", labels, &card->metric_input_height_pixels, Metrics::TYPE_GAUGE);
660 global_metrics.add("input_frame_rate_nom", labels, &card->metric_input_frame_rate_nom, Metrics::TYPE_GAUGE);
661 global_metrics.add("input_frame_rate_den", labels, &card->metric_input_frame_rate_den, Metrics::TYPE_GAUGE);
662 global_metrics.add("input_sample_rate_hz", labels, &card->metric_input_sample_rate_hz, Metrics::TYPE_GAUGE);
663 card->labels = labels;
666 void Mixer::set_output_card_internal(int card_index)
668 // We don't really need to take card_mutex, since we're in the mixer
669 // thread and don't mess with any queues (which is the only thing that happens
670 // from other threads), but it's probably the safest in the long run.
671 unique_lock<mutex> lock(card_mutex);
672 if (output_card_index != -1) {
673 // Switch the old card from output to input.
674 CaptureCard *old_card = &cards[output_card_index];
675 old_card->output->end_output();
677 // Stop the fake card that we put into place.
678 // This needs to _not_ happen under the mutex, to avoid deadlock
679 // (delivering the last frame needs to take the mutex).
680 CaptureInterface *fake_capture = old_card->capture.get();
682 fake_capture->stop_dequeue_thread();
684 old_card->capture = move(old_card->parked_capture); // TODO: reset the metrics
685 old_card->is_fake_capture = false;
686 old_card->capture->start_bm_capture();
688 if (card_index != -1) {
689 CaptureCard *card = &cards[card_index];
690 CaptureInterface *capture = card->capture.get();
691 // TODO: DeckLinkCapture::stop_dequeue_thread can actually take
692 // several seconds to complete (blocking on DisableVideoInput);
693 // see if we can maybe do it asynchronously.
695 capture->stop_dequeue_thread();
697 card->parked_capture = move(card->capture);
698 CaptureInterface *fake_capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio);
699 configure_card(card_index, fake_capture, CardType::FAKE_CAPTURE, card->output.release());
700 card->queue_length_policy.reset(card_index);
701 card->capture->start_bm_capture();
702 desired_output_video_mode = output_video_mode = card->output->pick_video_mode(desired_output_video_mode);
703 card->output->start_output(desired_output_video_mode, pts_int);
705 output_card_index = card_index;
706 output_jitter_history.clear();
711 int unwrap_timecode(uint16_t current_wrapped, int last)
713 uint16_t last_wrapped = last & 0xffff;
714 if (current_wrapped > last_wrapped) {
715 return (last & ~0xffff) | current_wrapped;
717 return 0x10000 + ((last & ~0xffff) | current_wrapped);
721 DeviceSpec card_index_to_device(unsigned card_index, unsigned num_cards)
723 if (card_index >= num_cards) {
724 return DeviceSpec{InputSourceType::FFMPEG_VIDEO_INPUT, card_index - num_cards};
726 return DeviceSpec{InputSourceType::CAPTURE_CARD, card_index};
732 void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
733 FrameAllocator::Frame video_frame, size_t video_offset, VideoFormat video_format,
734 FrameAllocator::Frame audio_frame, size_t audio_offset, AudioFormat audio_format)
736 DeviceSpec device = card_index_to_device(card_index, num_cards);
737 CaptureCard *card = &cards[card_index];
739 ++card->metric_input_received_frames;
740 card->metric_input_has_signal_bool = video_format.has_signal;
741 card->metric_input_is_connected_bool = video_format.is_connected;
742 card->metric_input_interlaced_bool = video_format.interlaced;
743 card->metric_input_width_pixels = video_format.width;
744 card->metric_input_height_pixels = video_format.height;
745 card->metric_input_frame_rate_nom = video_format.frame_rate_nom;
746 card->metric_input_frame_rate_den = video_format.frame_rate_den;
747 card->metric_input_sample_rate_hz = audio_format.sample_rate;
749 if (is_mode_scanning[card_index]) {
750 if (video_format.has_signal) {
751 // Found a stable signal, so stop scanning.
752 is_mode_scanning[card_index] = false;
754 static constexpr double switch_time_s = 0.1; // Should be enough time for the signal to stabilize.
755 steady_clock::time_point now = steady_clock::now();
756 double sec_since_last_switch = duration<double>(steady_clock::now() - last_mode_scan_change[card_index]).count();
757 if (sec_since_last_switch > switch_time_s) {
758 // It isn't this mode; try the next one.
759 mode_scanlist_index[card_index]++;
760 mode_scanlist_index[card_index] %= mode_scanlist[card_index].size();
761 cards[card_index].capture->set_video_mode(mode_scanlist[card_index][mode_scanlist_index[card_index]]);
762 last_mode_scan_change[card_index] = now;
767 int64_t frame_length = int64_t(TIMEBASE) * video_format.frame_rate_den / video_format.frame_rate_nom;
768 assert(frame_length > 0);
770 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;
771 if (num_samples > OUTPUT_FREQUENCY / 10 && card->type != CardType::FFMPEG_INPUT) {
772 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",
773 spec_to_string(device).c_str(), int(audio_frame.len), int(audio_offset),
774 timecode, int(video_frame.len), int(video_offset), video_format.id);
775 if (video_frame.owner) {
776 video_frame.owner->release_frame(video_frame);
778 if (audio_frame.owner) {
779 audio_frame.owner->release_frame(audio_frame);
784 int dropped_frames = 0;
785 if (card->last_timecode != -1) {
786 dropped_frames = unwrap_timecode(timecode, card->last_timecode) - card->last_timecode - 1;
789 // Number of samples per frame if we need to insert silence.
790 // (Could be nonintegral, but resampling will save us then.)
791 const int silence_samples = OUTPUT_FREQUENCY * video_format.frame_rate_den / video_format.frame_rate_nom;
793 if (dropped_frames > MAX_FPS * 2) {
794 fprintf(stderr, "%s lost more than two seconds (or time code jumping around; from 0x%04x to 0x%04x), resetting resampler\n",
795 spec_to_string(device).c_str(), card->last_timecode, timecode);
796 audio_mixer->reset_resampler(device);
798 ++card->metric_input_resets;
799 } else if (dropped_frames > 0) {
800 // Insert silence as needed.
801 fprintf(stderr, "%s dropped %d frame(s) (before timecode 0x%04x), inserting silence.\n",
802 spec_to_string(device).c_str(), dropped_frames, timecode);
803 card->metric_input_dropped_frames_error += dropped_frames;
807 success = audio_mixer->add_silence(device, silence_samples, dropped_frames);
811 if (num_samples > 0) {
812 audio_mixer->add_audio(device, audio_frame.data + audio_offset, num_samples, audio_format, audio_frame.received_timestamp);
814 // Audio for the MJPEG stream. We don't resample; audio that's not in 48 kHz
815 // just gets dropped for now.
817 // Only bother doing MJPEG encoding if there are any connected clients
818 // that want the stream.
819 if (httpd.get_num_connected_multicam_clients() > 0 ||
820 httpd.get_num_connected_siphon_clients(card_index) > 0) {
821 vector<int32_t> converted_samples = convert_audio_to_fixed32(audio_frame.data + audio_offset, num_samples, audio_format, 2);
822 lock_guard<mutex> lock(card_mutex);
823 if (card->new_raw_audio.empty()) {
824 card->new_raw_audio = move(converted_samples);
826 // For raw audio, we don't really synchronize audio and video;
827 // we just put the audio in frame by frame, and if a video frame is
828 // dropped, we still keep the audio, which means it will be added
829 // to the beginning of the next frame. It would probably be better
830 // to move the audio pts earlier to show this, but most players can
831 // live with some jitter, and in a lot of ways, it's much nicer for
832 // Futatabi to have all audio locked to a video frame.
833 card->new_raw_audio.insert(card->new_raw_audio.end(), converted_samples.begin(), converted_samples.end());
835 // Truncate to one second, just to be sure we don't have infinite buildup in case of weirdness.
836 if (card->new_raw_audio.size() > OUTPUT_FREQUENCY * 2) {
837 size_t excess_samples = card->new_raw_audio.size() - OUTPUT_FREQUENCY * 2;
838 card->new_raw_audio.erase(card->new_raw_audio.begin(), card->new_raw_audio.begin() + excess_samples);
844 // Done with the audio, so release it.
845 if (audio_frame.owner) {
846 audio_frame.owner->release_frame(audio_frame);
849 card->last_timecode = timecode;
851 PBOFrameAllocator::Userdata *userdata = (PBOFrameAllocator::Userdata *)video_frame.userdata;
852 if (card->type == CardType::FFMPEG_INPUT && userdata != nullptr) {
853 FFmpegCapture *ffmpeg_capture = static_cast<FFmpegCapture *>(card->capture.get());
854 userdata->has_last_subtitle = ffmpeg_capture->get_has_last_subtitle();
855 userdata->last_subtitle = ffmpeg_capture->get_last_subtitle();
858 size_t cbcr_width, cbcr_height, cbcr_offset, y_offset;
859 size_t expected_length = video_format.stride * (video_format.height + video_format.extra_lines_top + video_format.extra_lines_bottom);
860 if (userdata != nullptr && userdata->pixel_format == PixelFormat_8BitYCbCrPlanar) {
861 // The calculation above is wrong for planar Y'CbCr, so just override it.
862 assert(card->type == CardType::FFMPEG_INPUT);
863 assert(video_offset == 0);
864 expected_length = video_frame.len;
866 userdata->ycbcr_format = (static_cast<FFmpegCapture *>(card->capture.get()))->get_current_frame_ycbcr_format();
867 cbcr_width = video_format.width / userdata->ycbcr_format.chroma_subsampling_x;
868 cbcr_height = video_format.height / userdata->ycbcr_format.chroma_subsampling_y;
869 cbcr_offset = video_format.width * video_format.height;
872 // All the other Y'CbCr formats are 4:2:2.
873 cbcr_width = video_format.width / 2;
874 cbcr_height = video_format.height;
875 cbcr_offset = video_offset / 2;
876 y_offset = video_frame.size / 2 + video_offset / 2;
878 if (video_frame.len - video_offset == 0 ||
879 video_frame.len - video_offset != expected_length) {
880 if (video_frame.len != 0) {
881 printf("%s: Dropping video frame with wrong length (%zu; expected %zu)\n",
882 spec_to_string(device).c_str(), video_frame.len - video_offset, expected_length);
884 if (video_frame.owner) {
885 video_frame.owner->release_frame(video_frame);
888 // Still send on the information that we _had_ a frame, even though it's corrupted,
889 // so that pts can go up accordingly.
891 lock_guard<mutex> lock(card_mutex);
892 CaptureCard::NewFrame new_frame;
893 new_frame.frame = RefCountedFrame(FrameAllocator::Frame());
894 new_frame.length = frame_length;
895 new_frame.interlaced = false;
896 new_frame.dropped_frames = dropped_frames;
897 new_frame.received_timestamp = video_frame.received_timestamp;
898 card->new_frames.push_back(move(new_frame));
899 card->jitter_history.frame_arrived(video_frame.received_timestamp, frame_length, dropped_frames);
901 card->new_frames_changed.notify_all();
905 unsigned num_fields = video_format.interlaced ? 2 : 1;
906 steady_clock::time_point frame_upload_start;
907 bool interlaced_stride = false;
908 if (video_format.interlaced) {
909 // Send the two fields along as separate frames; the other side will need to add
910 // a deinterlacer to actually get this right.
911 assert(video_format.height % 2 == 0);
912 video_format.height /= 2;
914 assert(frame_length % 2 == 0);
917 if (video_format.second_field_start == 1) {
918 interlaced_stride = true;
920 frame_upload_start = steady_clock::now();
922 assert(userdata != nullptr);
923 userdata->last_interlaced = video_format.interlaced;
924 userdata->last_has_signal = video_format.has_signal;
925 userdata->last_is_connected = video_format.is_connected;
926 userdata->last_frame_rate_nom = video_format.frame_rate_nom;
927 userdata->last_frame_rate_den = video_format.frame_rate_den;
928 RefCountedFrame frame(video_frame);
930 // Upload the textures.
931 for (unsigned field = 0; field < num_fields; ++field) {
932 // Put the actual texture upload in a lambda that is executed in the main thread.
933 // It is entirely possible to do this in the same thread (and it might even be
934 // faster, depending on the GPU and driver), but it appears to be trickling
935 // driver bugs very easily.
937 // Note that this means we must hold on to the actual frame data in <userdata>
938 // until the upload command is run, but we hold on to <frame> much longer than that
939 // (in fact, all the way until we no longer use the texture in rendering).
940 auto upload_func = [this, field, video_format, y_offset, video_offset, cbcr_offset, cbcr_width, cbcr_height, interlaced_stride, userdata]() {
941 unsigned field_start_line;
943 field_start_line = video_format.second_field_start;
945 field_start_line = video_format.extra_lines_top;
948 // For anything not FRAME_FORMAT_YCBCR_10BIT, v210_width will be nonsensical but not used.
949 size_t v210_width = video_format.stride / sizeof(uint32_t);
950 ensure_texture_resolution(userdata, field, video_format.width, video_format.height, cbcr_width, cbcr_height, v210_width);
952 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, userdata->pbo);
955 switch (userdata->pixel_format) {
956 case PixelFormat_10BitYCbCr: {
957 size_t field_start = video_offset + video_format.stride * field_start_line;
958 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);
959 v210_converter->convert(userdata->tex_v210[field], userdata->tex_444[field], video_format.width, video_format.height);
962 case PixelFormat_8BitYCbCr: {
963 size_t field_y_start = y_offset + video_format.width * field_start_line;
964 size_t field_cbcr_start = cbcr_offset + cbcr_width * field_start_line * sizeof(uint16_t);
966 // Make up our own strides, since we are interleaving.
967 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);
968 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);
971 case PixelFormat_8BitYCbCrPlanar: {
972 assert(field_start_line == 0); // We don't really support interlaced here.
973 size_t field_y_start = y_offset;
974 size_t field_cb_start = cbcr_offset;
975 size_t field_cr_start = cbcr_offset + cbcr_width * cbcr_height;
977 // Make up our own strides, since we are interleaving.
978 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);
979 upload_texture(userdata->tex_cb[field], cbcr_width, cbcr_height, cbcr_width, interlaced_stride, GL_RED, GL_UNSIGNED_BYTE, field_cb_start);
980 upload_texture(userdata->tex_cr[field], cbcr_width, cbcr_height, cbcr_width, interlaced_stride, GL_RED, GL_UNSIGNED_BYTE, field_cr_start);
983 case PixelFormat_8BitBGRA: {
984 size_t field_start = video_offset + video_format.stride * field_start_line;
985 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);
986 // These could be asked to deliver mipmaps at any time.
987 glBindTexture(GL_TEXTURE_2D, userdata->tex_rgba[field]);
989 glGenerateMipmap(GL_TEXTURE_2D);
991 glBindTexture(GL_TEXTURE_2D, 0);
999 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
1004 // Don't upload the second field as fast as we can; wait until
1005 // the field time has approximately passed. (Otherwise, we could
1006 // get timing jitter against the other sources, and possibly also
1007 // against the video display, although the latter is not as critical.)
1008 // This requires our system clock to be reasonably close to the
1009 // video clock, but that's not an unreasonable assumption.
1010 steady_clock::time_point second_field_start = frame_upload_start +
1011 nanoseconds(frame_length * 1000000000 / TIMEBASE);
1012 this_thread::sleep_until(second_field_start);
1016 lock_guard<mutex> lock(card_mutex);
1017 CaptureCard::NewFrame new_frame;
1018 new_frame.frame = frame;
1019 new_frame.length = frame_length;
1020 new_frame.field = field;
1021 new_frame.interlaced = video_format.interlaced;
1022 new_frame.upload_func = upload_func;
1023 new_frame.dropped_frames = dropped_frames;
1024 new_frame.received_timestamp = video_frame.received_timestamp; // Ignore the audio timestamp.
1025 new_frame.video_format = video_format;
1026 new_frame.y_offset = y_offset;
1027 new_frame.cbcr_offset = cbcr_offset;
1028 if (card->type == CardType::FFMPEG_INPUT) {
1029 FFmpegCapture *ffmpeg_capture = static_cast<FFmpegCapture *>(card->capture.get());
1030 new_frame.neutral_color = ffmpeg_capture->get_last_neutral_color();
1032 card->new_frames.push_back(move(new_frame));
1033 card->jitter_history.frame_arrived(video_frame.received_timestamp, frame_length, dropped_frames);
1034 card->may_have_dropped_last_frame = false;
1036 card->new_frames_changed.notify_all();
1040 void Mixer::bm_hotplug_add(libusb_device *dev)
1042 lock_guard<mutex> lock(hotplug_mutex);
1043 hotplugged_cards.push_back(dev);
1046 void Mixer::bm_hotplug_remove(unsigned card_index)
1048 cards[card_index].new_frames_changed.notify_all();
1051 void Mixer::thread_func()
1053 pthread_setname_np(pthread_self(), "Mixer_OpenGL");
1055 eglBindAPI(EGL_OPENGL_API);
1056 QOpenGLContext *context = create_context(mixer_surface);
1057 if (!make_current(context, mixer_surface)) {
1062 // Start the actual capture. (We don't want to do it before we're actually ready
1063 // to process output frames.)
1064 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
1065 if (int(card_index) != output_card_index) {
1066 cards[card_index].capture->start_bm_capture();
1070 BasicStats basic_stats(/*verbose=*/true, /*use_opengl=*/true);
1071 int stats_dropped_frames = 0;
1073 while (!should_quit) {
1074 if (desired_output_card_index != output_card_index) {
1075 set_output_card_internal(desired_output_card_index);
1077 if (output_card_index != -1 &&
1078 desired_output_video_mode != output_video_mode) {
1079 DeckLinkOutput *output = cards[output_card_index].output.get();
1080 output->end_output();
1081 desired_output_video_mode = output_video_mode = output->pick_video_mode(desired_output_video_mode);
1082 output->start_output(desired_output_video_mode, pts_int);
1085 CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS];
1086 bool has_new_frame[MAX_VIDEO_CARDS] = { false };
1088 bool master_card_is_output;
1089 unsigned master_card_index;
1090 if (output_card_index != -1) {
1091 master_card_is_output = true;
1092 master_card_index = output_card_index;
1094 master_card_is_output = false;
1095 master_card_index = theme->map_signal_to_card(master_clock_channel);
1096 assert(master_card_index < num_cards + num_video_inputs);
1099 vector<int32_t> raw_audio[MAX_VIDEO_CARDS]; // For MJPEG encoding.
1100 OutputFrameInfo output_frame_info = get_one_frame_from_each_card(master_card_index, master_card_is_output, new_frames, has_new_frame, raw_audio);
1101 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);
1102 stats_dropped_frames += output_frame_info.dropped_frames;
1104 handle_hotplugged_cards();
1106 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
1107 DeviceSpec device = card_index_to_device(card_index, num_cards);
1108 if (card_index == master_card_index || !has_new_frame[card_index]) {
1111 if (new_frames[card_index].frame->len == 0) {
1112 ++new_frames[card_index].dropped_frames;
1114 if (new_frames[card_index].dropped_frames > 0) {
1115 printf("%s dropped %d frames before this\n",
1116 spec_to_string(device).c_str(), int(new_frames[card_index].dropped_frames));
1120 // If the first card is reporting a corrupted or otherwise dropped frame,
1121 // just increase the pts (skipping over this frame) and don't try to compute anything new.
1122 if (!master_card_is_output && new_frames[master_card_index].frame->len == 0) {
1123 ++stats_dropped_frames;
1124 pts_int += new_frames[master_card_index].length;
1128 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
1129 if (!has_new_frame[card_index] || new_frames[card_index].frame->len == 0)
1132 CaptureCard::NewFrame *new_frame = &new_frames[card_index];
1133 assert(new_frame->frame != nullptr);
1134 insert_new_frame(new_frame->frame, new_frame->field, new_frame->interlaced, card_index, &input_state);
1137 // The new texture might need uploading before use.
1138 if (new_frame->upload_func) {
1139 new_frame->upload_func();
1140 new_frame->upload_func = nullptr;
1143 // Only set the white balance if it actually changed. This means that the user
1144 // is free to override the white balance in a video with no white balance information
1145 // actually set (ie. r=g=b=1 all the time), or one where the white point is wrong,
1146 // but frame-to-frame decisions will be heeded. We do this pretty much as late
1147 // as possible (ie., after picking out the frame from the buffer), so that we are sure
1148 // that the change takes effect on exactly the right frame.
1149 if (fabs(new_frame->neutral_color.r - last_received_neutral_color[card_index].r) > 1e-3 ||
1150 fabs(new_frame->neutral_color.g - last_received_neutral_color[card_index].g) > 1e-3 ||
1151 fabs(new_frame->neutral_color.b - last_received_neutral_color[card_index].b) > 1e-3) {
1152 theme->set_wb_for_card(card_index, new_frame->neutral_color.r, new_frame->neutral_color.g, new_frame->neutral_color.b);
1153 last_received_neutral_color[card_index] = new_frame->neutral_color;
1156 if (new_frame->frame->data_copy != nullptr && mjpeg_encoder->should_encode_mjpeg_for_card(card_index)) {
1157 RGBTriplet neutral_color = theme->get_white_balance_for_card(card_index);
1158 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);
1163 int64_t frame_duration = output_frame_info.frame_duration;
1164 render_one_frame(frame_duration);
1166 lock_guard<mutex> lock(frame_num_mutex);
1169 frame_num_updated.notify_all();
1170 pts_int += frame_duration;
1172 basic_stats.update(frame_num, stats_dropped_frames);
1173 // if (frame_num % 100 == 0) chain->print_phase_timing();
1175 if (should_cut.exchange(false)) { // Test and clear.
1176 video_encoder->do_cut(frame_num);
1180 // Reset every 100 frames, so that local variations in frame times
1181 // (especially for the first few frames, when the shaders are
1182 // compiled etc.) don't make it hard to measure for the entire
1183 // remaining duration of the program.
1184 if (frame == 10000) {
1192 resource_pool->clean_context();
1195 bool Mixer::input_card_is_master_clock(unsigned card_index, unsigned master_card_index) const
1197 if (output_card_index != -1) {
1198 // The output card (ie., cards[output_card_index].output) is the master clock,
1199 // so no input card (ie., cards[card_index].capture) is.
1202 return (card_index == master_card_index);
1205 void Mixer::trim_queue(CaptureCard *card, size_t safe_queue_length)
1207 // Count the number of frames in the queue, including any frames
1208 // we dropped. It's hard to know exactly how we should deal with
1209 // dropped (corrupted) input frames; they don't help our goal of
1210 // avoiding starvation, but they still add to the problem of latency.
1211 // Since dropped frames is going to mean a bump in the signal anyway,
1212 // we err on the side of having more stable latency instead.
1213 unsigned queue_length = 0;
1214 for (const CaptureCard::NewFrame &frame : card->new_frames) {
1215 queue_length += frame.dropped_frames + 1;
1218 // If needed, drop frames until the queue is below the safe limit.
1219 // We prefer to drop from the head, because all else being equal,
1220 // we'd like more recent frames (less latency).
1221 unsigned dropped_frames = 0;
1222 while (queue_length > safe_queue_length) {
1223 assert(!card->new_frames.empty());
1224 assert(queue_length > card->new_frames.front().dropped_frames);
1225 queue_length -= card->new_frames.front().dropped_frames;
1227 if (queue_length <= safe_queue_length) {
1228 // No need to drop anything.
1232 card->new_frames.pop_front();
1233 card->new_frames_changed.notify_all();
1237 if (queue_length == 0 && card->is_cef_capture) {
1238 card->may_have_dropped_last_frame = true;
1242 card->metric_input_dropped_frames_jitter += dropped_frames;
1243 card->metric_input_queue_length_frames = queue_length;
1246 if (dropped_frames > 0) {
1247 fprintf(stderr, "Card %u dropped %u frame(s) to keep latency down.\n",
1248 card_index, dropped_frames);
1253 pair<string, string> Mixer::get_channels_json()
1256 for (int channel_idx = 0; channel_idx < theme->get_num_channels(); ++channel_idx) {
1257 Channel *channel = ret.add_channel();
1258 channel->set_index(channel_idx + 2);
1259 channel->set_name(theme->get_channel_name(channel_idx + 2));
1260 channel->set_color(theme->get_channel_color(channel_idx + 2));
1263 google::protobuf::util::MessageToJsonString(ret, &contents); // Ignore any errors.
1264 return make_pair(contents, "text/json");
1267 pair<string, string> Mixer::get_channel_color_http(unsigned channel_idx)
1269 return make_pair(theme->get_channel_color(channel_idx), "text/plain");
1272 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])
1274 OutputFrameInfo output_frame_info;
1276 unique_lock<mutex> lock(card_mutex, defer_lock);
1277 if (master_card_is_output) {
1278 // Clocked to the output, so wait for it to be ready for the next frame.
1279 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);
1282 // Wait for the master card to have a new frame.
1283 // TODO: Add a timeout.
1284 output_frame_info.is_preroll = false;
1286 cards[master_card_index].new_frames_changed.wait(lock, [this, master_card_index]{ return !cards[master_card_index].new_frames.empty() || cards[master_card_index].capture->get_disconnected(); });
1289 if (master_card_is_output) {
1290 handle_hotplugged_cards();
1291 } else if (cards[master_card_index].new_frames.empty()) {
1292 // We were woken up, but not due to a new frame. Deal with it
1293 // and then restart.
1294 assert(cards[master_card_index].capture->get_disconnected());
1295 handle_hotplugged_cards();
1300 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
1301 CaptureCard *card = &cards[card_index];
1302 if (card->new_frames.empty()) { // Starvation.
1303 ++card->metric_input_duped_frames;
1305 if (card->is_cef_capture && card->may_have_dropped_last_frame) {
1306 // Unlike other sources, CEF is not guaranteed to send us a steady
1307 // stream of frames, so we'll have to ask it to repaint the frame
1308 // we dropped. (may_have_dropped_last_frame is set whenever we
1309 // trim the queue completely away, and cleared when we actually
1310 // get a new frame.)
1311 ((CEFCapture *)card->capture.get())->request_new_frame(/*ignore_if_locked=*/true);
1315 new_frames[card_index] = move(card->new_frames.front());
1316 has_new_frame[card_index] = true;
1317 card->new_frames.pop_front();
1318 card->new_frames_changed.notify_all();
1321 raw_audio[card_index] = move(card->new_raw_audio);
1324 if (!master_card_is_output) {
1325 output_frame_info.frame_timestamp = new_frames[master_card_index].received_timestamp;
1326 output_frame_info.dropped_frames = new_frames[master_card_index].dropped_frames;
1327 output_frame_info.frame_duration = new_frames[master_card_index].length;
1330 if (!output_frame_info.is_preroll) {
1331 output_jitter_history.frame_arrived(output_frame_info.frame_timestamp, output_frame_info.frame_duration, output_frame_info.dropped_frames);
1334 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
1335 CaptureCard *card = &cards[card_index];
1336 if (has_new_frame[card_index] &&
1337 !input_card_is_master_clock(card_index, master_card_index) &&
1338 !output_frame_info.is_preroll) {
1339 card->queue_length_policy.update_policy(
1340 output_frame_info.frame_timestamp,
1341 card->jitter_history.get_expected_next_frame(),
1342 new_frames[master_card_index].length,
1343 output_frame_info.frame_duration,
1344 card->jitter_history.estimate_max_jitter(),
1345 output_jitter_history.estimate_max_jitter());
1346 trim_queue(card, min<int>(global_flags.max_input_queue_frames,
1347 card->queue_length_policy.get_safe_queue_length()));
1351 // This might get off by a fractional sample when changing master card
1352 // between ones with different frame rates, but that's fine.
1353 int num_samples_times_timebase = OUTPUT_FREQUENCY * output_frame_info.frame_duration + fractional_samples;
1354 output_frame_info.num_samples = num_samples_times_timebase / TIMEBASE;
1355 fractional_samples = num_samples_times_timebase % TIMEBASE;
1356 assert(output_frame_info.num_samples >= 0);
1358 return output_frame_info;
1361 void Mixer::handle_hotplugged_cards()
1363 // Check for cards that have been disconnected since last frame.
1364 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1365 CaptureCard *card = &cards[card_index];
1366 if (card->capture->get_disconnected()) {
1367 fprintf(stderr, "Card %u went away, replacing with a fake card.\n", card_index);
1368 FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio);
1369 configure_card(card_index, capture, CardType::FAKE_CAPTURE, /*output=*/nullptr);
1370 card->queue_length_policy.reset(card_index);
1371 card->capture->start_bm_capture();
1375 // Check for cards that have been connected since last frame.
1376 vector<libusb_device *> hotplugged_cards_copy;
1378 lock_guard<mutex> lock(hotplug_mutex);
1379 swap(hotplugged_cards, hotplugged_cards_copy);
1381 for (libusb_device *new_dev : hotplugged_cards_copy) {
1382 // Look for a fake capture card where we can stick this in.
1383 int free_card_index = -1;
1384 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1385 if (cards[card_index].is_fake_capture) {
1386 free_card_index = card_index;
1391 if (free_card_index == -1) {
1392 fprintf(stderr, "New card plugged in, but no free slots -- ignoring.\n");
1393 libusb_unref_device(new_dev);
1395 // BMUSBCapture takes ownership.
1396 fprintf(stderr, "New card plugged in, choosing slot %d.\n", free_card_index);
1397 CaptureCard *card = &cards[free_card_index];
1398 BMUSBCapture *capture = new BMUSBCapture(free_card_index, new_dev);
1399 configure_card(free_card_index, capture, CardType::LIVE_CARD, /*output=*/nullptr);
1400 card->queue_length_policy.reset(free_card_index);
1401 capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, free_card_index));
1402 capture->start_bm_capture();
1408 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)
1410 // Resample the audio as needed, including from previously dropped frames.
1411 assert(num_cards > 0);
1412 for (unsigned frame_num = 0; frame_num < dropped_frames + 1; ++frame_num) {
1413 const bool dropped_frame = (frame_num != dropped_frames);
1415 // Signal to the audio thread to process this frame.
1416 // Note that if the frame is a dropped frame, we signal that
1417 // we don't want to use this frame as base for adjusting
1418 // the resampler rate. The reason for this is that the timing
1419 // of these frames is often way too late; they typically don't
1420 // “arrive” before we synthesize them. Thus, we could end up
1421 // in a situation where we have inserted e.g. five audio frames
1422 // into the queue before we then start pulling five of them
1423 // back out. This makes ResamplingQueue overestimate the delay,
1424 // causing undue resampler changes. (We _do_ use the last,
1425 // non-dropped frame; perhaps we should just discard that as well,
1426 // since dropped frames are expected to be rare, and it might be
1427 // better to just wait until we have a slightly more normal situation).
1428 lock_guard<mutex> lock(audio_mutex);
1429 bool adjust_rate = !dropped_frame && !is_preroll;
1430 audio_task_queue.push(AudioTask{pts_int, num_samples_per_frame, adjust_rate, frame_timestamp});
1431 audio_task_queue_changed.notify_one();
1433 if (dropped_frame) {
1434 // For dropped frames, increase the pts. Note that if the format changed
1435 // in the meantime, we have no way of detecting that; we just have to
1436 // assume the frame length is always the same.
1437 pts_int += length_per_frame;
1442 void Mixer::render_one_frame(int64_t duration)
1444 // Determine the time code for this frame before we start rendering.
1445 string timecode_text = timecode_renderer->get_timecode_text(double(pts_int) / TIMEBASE, frame_num);
1446 if (display_timecode_on_stdout) {
1447 printf("Timecode: '%s'\n", timecode_text.c_str());
1450 // Update Y'CbCr settings for all cards.
1452 lock_guard<mutex> lock(card_mutex);
1453 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1454 YCbCrInterpretation *interpretation = &ycbcr_interpretation[card_index];
1455 input_state.ycbcr_coefficients_auto[card_index] = interpretation->ycbcr_coefficients_auto;
1456 input_state.ycbcr_coefficients[card_index] = interpretation->ycbcr_coefficients;
1457 input_state.full_range[card_index] = interpretation->full_range;
1461 // Get the main chain from the theme, and set its state immediately.
1462 Theme::Chain theme_main_chain = theme->get_chain(0, pts(), global_flags.width, global_flags.height, input_state);
1463 EffectChain *chain = theme_main_chain.chain;
1464 theme_main_chain.setup_chain();
1465 //theme_main_chain.chain->enable_phase_timing(true);
1467 // If HDMI/SDI output is active and the user has requested auto mode,
1468 // its mode overrides the existing Y'CbCr setting for the chain.
1469 YCbCrLumaCoefficients ycbcr_output_coefficients;
1470 if (global_flags.ycbcr_auto_coefficients && output_card_index != -1) {
1471 ycbcr_output_coefficients = cards[output_card_index].output->preferred_ycbcr_coefficients();
1473 ycbcr_output_coefficients = global_flags.ycbcr_rec709_coefficients ? YCBCR_REC_709 : YCBCR_REC_601;
1476 // TODO: Reduce the duplication against theme.cpp.
1477 YCbCrFormat output_ycbcr_format;
1478 output_ycbcr_format.chroma_subsampling_x = 1;
1479 output_ycbcr_format.chroma_subsampling_y = 1;
1480 output_ycbcr_format.luma_coefficients = ycbcr_output_coefficients;
1481 output_ycbcr_format.full_range = false;
1482 output_ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
1483 chain->change_ycbcr_output_format(output_ycbcr_format);
1485 // Render main chain. If we're using zerocopy Quick Sync encoding
1486 // (the default case), we take an extra copy of the created outputs,
1487 // so that we can display it back to the screen later (it's less memory
1488 // bandwidth than writing and reading back an RGBA texture, even at 16-bit).
1489 // Ideally, we'd like to avoid taking copies and just use the main textures
1490 // for display as well, but they're just views into VA-API memory and must be
1491 // unmapped during encoding, so we can't use them for display, unfortunately.
1492 GLuint y_tex, cbcr_full_tex, cbcr_tex;
1493 GLuint y_copy_tex, cbcr_copy_tex = 0;
1494 GLuint y_display_tex, cbcr_display_tex;
1495 GLenum y_type = (global_flags.x264_bit_depth > 8) ? GL_R16 : GL_R8;
1496 GLenum cbcr_type = (global_flags.x264_bit_depth > 8) ? GL_RG16 : GL_RG8;
1497 const bool is_zerocopy = video_encoder->is_zerocopy();
1499 cbcr_full_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width, global_flags.height);
1500 y_copy_tex = resource_pool->create_2d_texture(y_type, global_flags.width, global_flags.height);
1501 cbcr_copy_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width / 2, global_flags.height / 2);
1503 y_display_tex = y_copy_tex;
1504 cbcr_display_tex = cbcr_copy_tex;
1506 // y_tex and cbcr_tex will be given by VideoEncoder.
1508 cbcr_full_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width, global_flags.height);
1509 y_tex = resource_pool->create_2d_texture(y_type, global_flags.width, global_flags.height);
1510 cbcr_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width / 2, global_flags.height / 2);
1512 y_display_tex = y_tex;
1513 cbcr_display_tex = cbcr_tex;
1516 const int64_t av_delay = lrint(global_flags.audio_queue_length_ms * 0.001 * TIMEBASE); // Corresponds to the delay in ResamplingQueue.
1517 bool got_frame = video_encoder->begin_frame(pts_int + av_delay, duration, ycbcr_output_coefficients, theme_main_chain.input_frames, &y_tex, &cbcr_tex);
1522 fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex, y_copy_tex);
1524 fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex);
1527 chain->render_to_fbo(fbo, global_flags.width, global_flags.height);
1529 if (display_timecode_in_stream) {
1530 // Render the timecode on top.
1531 timecode_renderer->render_timecode(fbo, timecode_text);
1534 resource_pool->release_fbo(fbo);
1537 chroma_subsampler->subsample_chroma(cbcr_full_tex, global_flags.width, global_flags.height, cbcr_tex, cbcr_copy_tex);
1539 chroma_subsampler->subsample_chroma(cbcr_full_tex, global_flags.width, global_flags.height, cbcr_tex);
1541 if (output_card_index != -1) {
1542 cards[output_card_index].output->send_frame(y_tex, cbcr_full_tex, ycbcr_output_coefficients, theme_main_chain.input_frames, pts_int, duration);
1544 resource_pool->release_2d_texture(cbcr_full_tex);
1546 // Set the right state for the Y' and CbCr textures we use for display.
1547 glBindFramebuffer(GL_FRAMEBUFFER, 0);
1548 glBindTexture(GL_TEXTURE_2D, y_display_tex);
1549 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1550 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1551 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1553 glBindTexture(GL_TEXTURE_2D, cbcr_display_tex);
1554 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1555 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1556 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1558 RefCountedGLsync fence = video_encoder->end_frame();
1560 // The live frame pieces the Y'CbCr texture copies back into RGB and displays them.
1561 // It owns y_display_tex and cbcr_display_tex now (whichever textures they are).
1562 DisplayFrame live_frame;
1563 live_frame.chain = display_chain.get();
1564 live_frame.setup_chain = [this, y_display_tex, cbcr_display_tex]{
1565 display_input->set_texture_num(0, y_display_tex);
1566 display_input->set_texture_num(1, cbcr_display_tex);
1568 live_frame.ready_fence = fence;
1569 live_frame.input_frames = {};
1570 live_frame.temp_textures = { y_display_tex, cbcr_display_tex };
1571 output_channel[OUTPUT_LIVE].output_frame(move(live_frame));
1573 // Set up preview and any additional channels.
1574 for (int i = 1; i < theme->get_num_channels() + 2; ++i) {
1575 DisplayFrame display_frame;
1576 Theme::Chain chain = theme->get_chain(i, pts(), global_flags.width, global_flags.height, input_state); // FIXME: dimensions
1577 display_frame.chain = move(chain.chain);
1578 display_frame.setup_chain = move(chain.setup_chain);
1579 display_frame.ready_fence = fence;
1580 display_frame.input_frames = move(chain.input_frames);
1581 display_frame.temp_textures = {};
1582 output_channel[i].output_frame(move(display_frame));
1586 void Mixer::audio_thread_func()
1588 pthread_setname_np(pthread_self(), "Mixer_Audio");
1590 while (!should_quit) {
1594 unique_lock<mutex> lock(audio_mutex);
1595 audio_task_queue_changed.wait(lock, [this]{ return should_quit || !audio_task_queue.empty(); });
1599 task = audio_task_queue.front();
1600 audio_task_queue.pop();
1603 ResamplingQueue::RateAdjustmentPolicy rate_adjustment_policy =
1604 task.adjust_rate ? ResamplingQueue::ADJUST_RATE : ResamplingQueue::DO_NOT_ADJUST_RATE;
1605 vector<float> samples_out = audio_mixer->get_output(
1606 task.frame_timestamp,
1608 rate_adjustment_policy);
1610 // Send the samples to the sound card, then add them to the output.
1612 alsa->write(samples_out);
1614 if (output_card_index != -1) {
1615 const int64_t av_delay = lrint(global_flags.audio_queue_length_ms * 0.001 * TIMEBASE); // Corresponds to the delay in ResamplingQueue.
1616 cards[output_card_index].output->send_audio(task.pts_int + av_delay, samples_out);
1618 video_encoder->add_audio(task.pts_int, move(samples_out));
1622 void Mixer::release_display_frame(DisplayFrame *frame)
1624 for (GLuint texnum : frame->temp_textures) {
1625 resource_pool->release_2d_texture(texnum);
1627 frame->temp_textures.clear();
1628 frame->ready_fence.reset();
1629 frame->input_frames.clear();
1634 mixer_thread = thread(&Mixer::thread_func, this);
1635 audio_thread = thread(&Mixer::audio_thread_func, this);
1641 audio_task_queue_changed.notify_one();
1642 mixer_thread.join();
1643 audio_thread.join();
1646 void Mixer::transition_clicked(int transition_num)
1648 theme->transition_clicked(transition_num, pts());
1651 void Mixer::channel_clicked(int preview_num)
1653 theme->channel_clicked(preview_num);
1656 YCbCrInterpretation Mixer::get_input_ycbcr_interpretation(unsigned card_index) const
1658 lock_guard<mutex> lock(card_mutex);
1659 return ycbcr_interpretation[card_index];
1662 void Mixer::set_input_ycbcr_interpretation(unsigned card_index, const YCbCrInterpretation &interpretation)
1664 lock_guard<mutex> lock(card_mutex);
1665 ycbcr_interpretation[card_index] = interpretation;
1668 void Mixer::start_mode_scanning(unsigned card_index)
1670 assert(card_index < num_cards);
1671 if (is_mode_scanning[card_index]) {
1674 is_mode_scanning[card_index] = true;
1675 mode_scanlist[card_index].clear();
1676 for (const auto &mode : cards[card_index].capture->get_available_video_modes()) {
1677 mode_scanlist[card_index].push_back(mode.first);
1679 assert(!mode_scanlist[card_index].empty());
1680 mode_scanlist_index[card_index] = 0;
1681 cards[card_index].capture->set_video_mode(mode_scanlist[card_index][0]);
1682 last_mode_scan_change[card_index] = steady_clock::now();
1685 map<uint32_t, VideoMode> Mixer::get_available_output_video_modes() const
1687 assert(desired_output_card_index != -1);
1688 lock_guard<mutex> lock(card_mutex);
1689 return cards[desired_output_card_index].output->get_available_video_modes();
1692 string Mixer::get_ffmpeg_filename(unsigned card_index) const
1694 assert(card_index >= num_cards && card_index < num_cards + num_video_inputs);
1695 return ((FFmpegCapture *)(cards[card_index].capture.get()))->get_filename();
1698 void Mixer::set_ffmpeg_filename(unsigned card_index, const string &filename) {
1699 assert(card_index >= num_cards && card_index < num_cards + num_video_inputs);
1700 ((FFmpegCapture *)(cards[card_index].capture.get()))->change_filename(filename);
1703 void Mixer::wait_for_next_frame()
1705 unique_lock<mutex> lock(frame_num_mutex);
1706 unsigned old_frame_num = frame_num;
1707 frame_num_updated.wait_for(lock, seconds(1), // Timeout is just in case.
1708 [old_frame_num, this]{ return this->frame_num > old_frame_num; });
1711 Mixer::OutputChannel::~OutputChannel()
1713 if (has_current_frame) {
1714 parent->release_display_frame(¤t_frame);
1716 if (has_ready_frame) {
1717 parent->release_display_frame(&ready_frame);
1721 void Mixer::OutputChannel::output_frame(DisplayFrame &&frame)
1723 // Store this frame for display. Remove the ready frame if any
1724 // (it was seemingly never used).
1726 lock_guard<mutex> lock(frame_mutex);
1727 if (has_ready_frame) {
1728 parent->release_display_frame(&ready_frame);
1730 ready_frame = move(frame);
1731 has_ready_frame = true;
1733 // Call the callbacks under the mutex (they should be short),
1734 // so that we don't race against a callback removal.
1735 for (const auto &key_and_callback : new_frame_ready_callbacks) {
1736 key_and_callback.second();
1740 // Reduce the number of callbacks by filtering duplicates. The reason
1741 // why we bother doing this is that Qt seemingly can get into a state
1742 // where its builds up an essentially unbounded queue of signals,
1743 // consuming more and more memory, and there's no good way of collapsing
1744 // user-defined signals or limiting the length of the queue.
1745 if (transition_names_updated_callback) {
1746 vector<string> transition_names = global_mixer->get_transition_names();
1747 bool changed = false;
1748 if (transition_names.size() != last_transition_names.size()) {
1751 for (unsigned i = 0; i < transition_names.size(); ++i) {
1752 if (transition_names[i] != last_transition_names[i]) {
1759 transition_names_updated_callback(transition_names);
1760 last_transition_names = transition_names;
1763 if (name_updated_callback) {
1764 string name = global_mixer->get_channel_name(channel);
1765 if (name != last_name) {
1766 name_updated_callback(name);
1770 if (color_updated_callback) {
1771 string color = global_mixer->get_channel_color(channel);
1772 if (color != last_color) {
1773 color_updated_callback(color);
1779 bool Mixer::OutputChannel::get_display_frame(DisplayFrame *frame)
1781 lock_guard<mutex> lock(frame_mutex);
1782 if (!has_current_frame && !has_ready_frame) {
1786 if (has_current_frame && has_ready_frame) {
1787 // We have a new ready frame. Toss the current one.
1788 parent->release_display_frame(¤t_frame);
1789 has_current_frame = false;
1791 if (has_ready_frame) {
1792 assert(!has_current_frame);
1793 current_frame = move(ready_frame);
1794 ready_frame.ready_fence.reset(); // Drop the refcount.
1795 ready_frame.input_frames.clear(); // Drop the refcounts.
1796 has_current_frame = true;
1797 has_ready_frame = false;
1800 *frame = current_frame;
1804 void Mixer::OutputChannel::add_frame_ready_callback(void *key, Mixer::new_frame_ready_callback_t callback)
1806 lock_guard<mutex> lock(frame_mutex);
1807 new_frame_ready_callbacks[key] = callback;
1810 void Mixer::OutputChannel::remove_frame_ready_callback(void *key)
1812 lock_guard<mutex> lock(frame_mutex);
1813 new_frame_ready_callbacks.erase(key);
1816 void Mixer::OutputChannel::set_transition_names_updated_callback(Mixer::transition_names_updated_callback_t callback)
1818 transition_names_updated_callback = callback;
1821 void Mixer::OutputChannel::set_name_updated_callback(Mixer::name_updated_callback_t callback)
1823 name_updated_callback = callback;
1826 void Mixer::OutputChannel::set_color_updated_callback(Mixer::color_updated_callback_t callback)
1828 color_updated_callback = callback;
1831 mutex RefCountedGLsync::fence_lock;