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;
114 width != userdata->last_width[field] ||
115 height != userdata->last_height[field] ||
116 cbcr_width != userdata->last_cbcr_width[field] ||
117 cbcr_height != userdata->last_cbcr_height[field]) {
118 // We changed resolution since last use of this texture, so we need to create
119 // a new object. Note that this each card has its own PBOFrameAllocator,
120 // we don't need to worry about these flip-flopping between resolutions.
121 switch (userdata->pixel_format) {
122 case PixelFormat_10BitYCbCr:
123 glBindTexture(GL_TEXTURE_2D, userdata->tex_444[field]);
125 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, nullptr);
128 case PixelFormat_8BitYCbCr: {
129 glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
131 glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, cbcr_width, height, 0, GL_RG, GL_UNSIGNED_BYTE, nullptr);
133 glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
135 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
139 case PixelFormat_8BitYCbCrPlanar: {
140 glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
142 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
144 glBindTexture(GL_TEXTURE_2D, userdata->tex_cb[field]);
146 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, cbcr_width, cbcr_height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
148 glBindTexture(GL_TEXTURE_2D, userdata->tex_cr[field]);
150 glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, cbcr_width, cbcr_height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
154 case PixelFormat_8BitBGRA:
155 glBindTexture(GL_TEXTURE_2D, userdata->tex_rgba[field]);
157 // NOTE: sRGB may be disabled by sRGBSwitchingFlatInput.
158 glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8_ALPHA8, width, height, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, nullptr);
164 userdata->last_width[field] = width;
165 userdata->last_height[field] = height;
166 userdata->last_cbcr_width[field] = cbcr_width;
167 userdata->last_cbcr_height[field] = cbcr_height;
169 if (global_flags.ten_bit_input &&
170 (first || v210_width != userdata->last_v210_width[field])) {
171 // Same as above; we need to recreate the texture.
172 glBindTexture(GL_TEXTURE_2D, userdata->tex_v210[field]);
174 glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, v210_width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, nullptr);
176 userdata->last_v210_width[field] = v210_width;
180 void upload_texture(GLuint tex, GLuint width, GLuint height, GLuint stride, bool interlaced_stride, GLenum format, GLenum type, GLintptr offset)
182 if (interlaced_stride) {
185 if (global_flags.flush_pbos) {
186 glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, offset, stride * height);
190 glBindTexture(GL_TEXTURE_2D, tex);
192 if (interlaced_stride) {
193 glPixelStorei(GL_UNPACK_ROW_LENGTH, width * 2);
196 glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
200 glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, BUFFER_OFFSET(offset));
202 glBindTexture(GL_TEXTURE_2D, 0);
204 glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
210 void JitterHistory::register_metrics(const vector<pair<string, string>> &labels)
212 global_metrics.add("input_underestimated_jitter_frames", labels, &metric_input_underestimated_jitter_frames);
213 global_metrics.add("input_estimated_max_jitter_seconds", labels, &metric_input_estimated_max_jitter_seconds, Metrics::TYPE_GAUGE);
216 void JitterHistory::unregister_metrics(const vector<pair<string, string>> &labels)
218 global_metrics.remove("input_underestimated_jitter_frames", labels);
219 global_metrics.remove("input_estimated_max_jitter_seconds", labels);
222 void JitterHistory::frame_arrived(steady_clock::time_point now, int64_t frame_duration, size_t dropped_frames)
224 if (expected_timestamp > steady_clock::time_point::min()) {
225 expected_timestamp += dropped_frames * nanoseconds(frame_duration * 1000000000 / TIMEBASE);
226 double jitter_seconds = fabs(duration<double>(expected_timestamp - now).count());
227 history.push_back(orders.insert(jitter_seconds));
228 if (jitter_seconds > estimate_max_jitter()) {
229 ++metric_input_underestimated_jitter_frames;
232 metric_input_estimated_max_jitter_seconds = estimate_max_jitter();
234 if (history.size() > history_length) {
235 orders.erase(history.front());
238 assert(history.size() <= history_length);
240 expected_timestamp = now + nanoseconds(frame_duration * 1000000000 / TIMEBASE);
243 double JitterHistory::estimate_max_jitter() const
245 if (orders.empty()) {
248 size_t elem_idx = lrint((orders.size() - 1) * percentile);
249 if (percentile <= 0.5) {
250 return *next(orders.begin(), elem_idx) * multiplier;
252 return *prev(orders.end(), orders.size() - elem_idx) * multiplier;
256 void QueueLengthPolicy::register_metrics(const vector<pair<string, string>> &labels)
258 global_metrics.add("input_queue_safe_length_frames", labels, &metric_input_queue_safe_length_frames, Metrics::TYPE_GAUGE);
261 void QueueLengthPolicy::unregister_metrics(const vector<pair<string, string>> &labels)
263 global_metrics.remove("input_queue_safe_length_frames", labels);
266 void QueueLengthPolicy::update_policy(steady_clock::time_point now,
267 steady_clock::time_point expected_next_frame,
268 int64_t input_frame_duration,
269 int64_t master_frame_duration,
270 double max_input_card_jitter_seconds,
271 double max_master_card_jitter_seconds)
273 double input_frame_duration_seconds = input_frame_duration / double(TIMEBASE);
274 double master_frame_duration_seconds = master_frame_duration / double(TIMEBASE);
276 // Figure out when we can expect the next frame for this card, assuming
277 // worst-case jitter (ie., the frame is maximally late).
278 double seconds_until_next_frame = max(duration<double>(expected_next_frame - now).count() + max_input_card_jitter_seconds, 0.0);
280 // How many times are the master card expected to tick in that time?
281 // We assume the master clock has worst-case jitter but not any rate
282 // discrepancy, ie., it ticks as early as possible every time, but not
284 double frames_needed = (seconds_until_next_frame + max_master_card_jitter_seconds) / master_frame_duration_seconds;
286 // As a special case, if the master card ticks faster than the input card,
287 // we expect the queue to drain by itself even without dropping. But if
288 // the difference is small (e.g. 60 Hz master and 59.94 input), it would
289 // go slowly enough that the effect wouldn't really be appreciable.
290 // We account for this by looking at the situation five frames ahead,
291 // assuming everything else is the same.
292 double frames_allowed;
293 if (master_frame_duration < input_frame_duration) {
294 frames_allowed = frames_needed + 5 * (input_frame_duration_seconds - master_frame_duration_seconds) / master_frame_duration_seconds;
296 frames_allowed = frames_needed;
299 safe_queue_length = max<int>(floor(frames_allowed), 0);
300 metric_input_queue_safe_length_frames = safe_queue_length;
303 Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards)
305 num_cards(num_cards),
306 mixer_surface(create_surface(format)),
307 h264_encoder_surface(create_surface(format)),
308 decklink_output_surface(create_surface(format)),
309 image_update_surface(create_surface(format))
311 memcpy(ycbcr_interpretation, global_flags.ycbcr_interpretation, sizeof(ycbcr_interpretation));
312 CHECK(init_movit(MOVIT_SHADER_DIR, MOVIT_DEBUG_OFF));
315 if (!epoxy_has_gl_extension("GL_EXT_texture_sRGB_decode") ||
316 !epoxy_has_gl_extension("GL_ARB_sampler_objects")) {
317 fprintf(stderr, "Nageru requires GL_EXT_texture_sRGB_decode and GL_ARB_sampler_objects to run.\n");
321 // Since we allow non-bouncing 4:2:2 YCbCrInputs, effective subpixel precision
322 // will be halved when sampling them, and we need to compensate here.
323 movit_texel_subpixel_precision /= 2.0;
325 resource_pool.reset(new ResourcePool);
326 for (unsigned i = 0; i < NUM_OUTPUTS; ++i) {
327 output_channel[i].parent = this;
328 output_channel[i].channel = i;
331 ImageFormat inout_format;
332 inout_format.color_space = COLORSPACE_sRGB;
333 inout_format.gamma_curve = GAMMA_sRGB;
335 // Matches the 4:2:0 format created by the main chain.
336 YCbCrFormat ycbcr_format;
337 ycbcr_format.chroma_subsampling_x = 2;
338 ycbcr_format.chroma_subsampling_y = 2;
339 if (global_flags.ycbcr_rec709_coefficients) {
340 ycbcr_format.luma_coefficients = YCBCR_REC_709;
342 ycbcr_format.luma_coefficients = YCBCR_REC_601;
344 ycbcr_format.full_range = false;
345 ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
346 ycbcr_format.cb_x_position = 0.0f;
347 ycbcr_format.cr_x_position = 0.0f;
348 ycbcr_format.cb_y_position = 0.5f;
349 ycbcr_format.cr_y_position = 0.5f;
351 // Initialize the neutral colors to sane values.
352 for (unsigned i = 0; i < MAX_VIDEO_CARDS; ++i) {
353 last_received_neutral_color[i] = RGBTriplet(1.0f, 1.0f, 1.0f);
356 // Display chain; shows the live output produced by the main chain (or rather, a copy of it).
357 display_chain.reset(new EffectChain(global_flags.width, global_flags.height, resource_pool.get()));
359 GLenum type = global_flags.x264_bit_depth > 8 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
360 display_input = new YCbCrInput(inout_format, ycbcr_format, global_flags.width, global_flags.height, YCBCR_INPUT_SPLIT_Y_AND_CBCR, type);
361 display_chain->add_input(display_input);
362 display_chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
363 display_chain->set_dither_bits(0); // Don't bother.
364 display_chain->finalize();
366 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));
367 if (!global_flags.card_to_mjpeg_stream_export.empty()) {
368 mjpeg_encoder.reset(new MJPEGEncoder(&httpd, global_flags.va_display));
371 // Must be instantiated after VideoEncoder has initialized global_flags.use_zerocopy.
372 theme.reset(new Theme(global_flags.theme_filename, global_flags.theme_dirs, resource_pool.get(), num_cards));
374 // Must be instantiated after the theme, as the theme decides the number of FFmpeg inputs.
375 std::vector<FFmpegCapture *> video_inputs = theme->get_video_inputs();
376 audio_mixer.reset(new AudioMixer(num_cards, video_inputs.size()));
378 httpd.add_endpoint("/channels", bind(&Mixer::get_channels_json, this), HTTPD::ALLOW_ALL_ORIGINS);
379 for (int channel_idx = 0; channel_idx < theme->get_num_channels(); ++channel_idx) {
381 snprintf(url, sizeof(url), "/channels/%d/color", channel_idx + 2);
382 httpd.add_endpoint(url, bind(&Mixer::get_channel_color_http, this, unsigned(channel_idx + 2)), HTTPD::ALLOW_ALL_ORIGINS);
385 // Start listening for clients only once VideoEncoder has written its header, if any.
386 httpd.start(global_flags.http_port);
388 // First try initializing the then PCI devices, then USB, then
389 // fill up with fake cards until we have the desired number of cards.
390 unsigned num_pci_devices = 0;
391 unsigned card_index = 0;
394 IDeckLinkIterator *decklink_iterator = CreateDeckLinkIteratorInstance();
395 if (decklink_iterator != nullptr) {
396 for ( ; card_index < num_cards; ++card_index) {
398 if (decklink_iterator->Next(&decklink) != S_OK) {
402 DeckLinkCapture *capture = new DeckLinkCapture(decklink, card_index);
403 DeckLinkOutput *output = new DeckLinkOutput(resource_pool.get(), decklink_output_surface, global_flags.width, global_flags.height, card_index);
404 if (!output->set_device(decklink)) {
408 configure_card(card_index, capture, CardType::LIVE_CARD, output);
411 decklink_iterator->Release();
412 fprintf(stderr, "Found %u DeckLink PCI card(s).\n", num_pci_devices);
414 fprintf(stderr, "DeckLink drivers not found. Probing for USB cards only.\n");
418 unsigned num_usb_devices = BMUSBCapture::num_cards();
419 for (unsigned usb_card_index = 0; usb_card_index < num_usb_devices && card_index < num_cards; ++usb_card_index, ++card_index) {
420 BMUSBCapture *capture = new BMUSBCapture(usb_card_index);
421 capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, card_index));
422 configure_card(card_index, capture, CardType::LIVE_CARD, /*output=*/nullptr);
424 fprintf(stderr, "Found %u USB card(s).\n", num_usb_devices);
426 unsigned num_fake_cards = 0;
427 for ( ; card_index < num_cards; ++card_index, ++num_fake_cards) {
428 FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio);
429 configure_card(card_index, capture, CardType::FAKE_CAPTURE, /*output=*/nullptr);
432 if (num_fake_cards > 0) {
433 fprintf(stderr, "Initialized %u fake cards.\n", num_fake_cards);
436 // Initialize all video inputs the theme asked for. Note that these are
437 // all put _after_ the regular cards, which stop at <num_cards> - 1.
438 for (unsigned video_card_index = 0; video_card_index < video_inputs.size(); ++card_index, ++video_card_index) {
439 if (card_index >= MAX_VIDEO_CARDS) {
440 fprintf(stderr, "ERROR: Not enough card slots available for the videos the theme requested.\n");
443 configure_card(card_index, video_inputs[video_card_index], CardType::FFMPEG_INPUT, /*output=*/nullptr);
444 video_inputs[video_card_index]->set_card_index(card_index);
446 num_video_inputs = video_inputs.size();
449 // Same, for HTML inputs.
450 std::vector<CEFCapture *> html_inputs = theme->get_html_inputs();
451 for (unsigned html_card_index = 0; html_card_index < html_inputs.size(); ++card_index, ++html_card_index) {
452 if (card_index >= MAX_VIDEO_CARDS) {
453 fprintf(stderr, "ERROR: Not enough card slots available for the HTML inputs the theme requested.\n");
456 configure_card(card_index, html_inputs[html_card_index], CardType::CEF_INPUT, /*output=*/nullptr);
457 html_inputs[html_card_index]->set_card_index(card_index);
459 num_html_inputs = html_inputs.size();
462 BMUSBCapture::set_card_connected_callback(bind(&Mixer::bm_hotplug_add, this, _1));
463 BMUSBCapture::start_bm_thread();
465 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
466 cards[card_index].queue_length_policy.reset(card_index);
469 chroma_subsampler.reset(new ChromaSubsampler(resource_pool.get()));
471 if (global_flags.ten_bit_input) {
472 if (!v210Converter::has_hardware_support()) {
473 fprintf(stderr, "ERROR: --ten-bit-input requires support for OpenGL compute shaders\n");
474 fprintf(stderr, " (OpenGL 4.3, or GL_ARB_compute_shader + GL_ARB_shader_image_load_store).\n");
477 v210_converter.reset(new v210Converter());
479 // These are all the widths listed in the Blackmagic SDK documentation
480 // (section 2.7.3, “Display Modes”).
481 v210_converter->precompile_shader(720);
482 v210_converter->precompile_shader(1280);
483 v210_converter->precompile_shader(1920);
484 v210_converter->precompile_shader(2048);
485 v210_converter->precompile_shader(3840);
486 v210_converter->precompile_shader(4096);
488 if (global_flags.ten_bit_output) {
489 if (!v210Converter::has_hardware_support()) {
490 fprintf(stderr, "ERROR: --ten-bit-output requires support for OpenGL compute shaders\n");
491 fprintf(stderr, " (OpenGL 4.3, or GL_ARB_compute_shader + GL_ARB_shader_image_load_store).\n");
496 timecode_renderer.reset(new TimecodeRenderer(resource_pool.get(), global_flags.width, global_flags.height));
497 display_timecode_in_stream = global_flags.display_timecode_in_stream;
498 display_timecode_on_stdout = global_flags.display_timecode_on_stdout;
500 if (global_flags.enable_alsa_output) {
501 alsa.reset(new ALSAOutput(OUTPUT_FREQUENCY, /*num_channels=*/2));
503 if (global_flags.output_card != -1) {
504 desired_output_card_index = global_flags.output_card;
505 set_output_card_internal(global_flags.output_card);
508 output_jitter_history.register_metrics({{ "card", "output" }});
510 ImageInput::start_update_thread(image_update_surface);
515 ImageInput::end_update_thread();
517 if (mjpeg_encoder != nullptr) {
518 mjpeg_encoder->stop();
521 BMUSBCapture::stop_bm_thread();
523 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
524 cards[card_index].capture->stop_dequeue_thread();
525 if (cards[card_index].output) {
526 cards[card_index].output->end_output();
527 cards[card_index].output.reset();
531 video_encoder.reset(nullptr);
534 void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, CardType card_type, DeckLinkOutput *output)
536 printf("Configuring card %d...\n", card_index);
538 CaptureCard *card = &cards[card_index];
539 if (card->capture != nullptr) {
540 card->capture->stop_dequeue_thread();
542 card->capture.reset(capture);
543 card->is_fake_capture = (card_type == CardType::FAKE_CAPTURE);
544 card->is_cef_capture = (card_type == CardType::CEF_INPUT);
545 card->may_have_dropped_last_frame = false;
546 card->type = card_type;
547 if (card->output.get() != output) {
548 card->output.reset(output);
551 PixelFormat pixel_format;
552 if (card_type == CardType::FFMPEG_INPUT) {
553 pixel_format = capture->get_current_pixel_format();
554 } else if (card_type == CardType::CEF_INPUT) {
555 pixel_format = PixelFormat_8BitBGRA;
556 } else if (global_flags.ten_bit_input) {
557 pixel_format = PixelFormat_10BitYCbCr;
559 pixel_format = PixelFormat_8BitYCbCr;
562 card->capture->set_frame_callback(bind(&Mixer::bm_frame, this, card_index, _1, _2, _3, _4, _5, _6, _7));
563 if (card->frame_allocator == nullptr) {
564 card->frame_allocator.reset(new PBOFrameAllocator(pixel_format, 8 << 20, global_flags.width, global_flags.height, card_index, mjpeg_encoder.get())); // 8 MB.
566 card->capture->set_video_frame_allocator(card->frame_allocator.get());
567 if (card->surface == nullptr) {
568 card->surface = create_surface_with_same_format(mixer_surface);
570 while (!card->new_frames.empty()) card->new_frames.pop_front();
571 card->last_timecode = -1;
572 card->capture->set_pixel_format(pixel_format);
573 card->capture->configure_card();
575 // NOTE: start_bm_capture() happens in thread_func().
578 if (card_type == CardType::FFMPEG_INPUT) {
579 device = DeviceSpec{InputSourceType::FFMPEG_VIDEO_INPUT, card_index - num_cards};
581 device = DeviceSpec{InputSourceType::CAPTURE_CARD, card_index};
583 audio_mixer->reset_resampler(device);
584 audio_mixer->set_display_name(device, card->capture->get_description());
585 audio_mixer->trigger_state_changed_callback();
587 // Unregister old metrics, if any.
588 if (!card->labels.empty()) {
589 const vector<pair<string, string>> &labels = card->labels;
590 card->jitter_history.unregister_metrics(labels);
591 card->queue_length_policy.unregister_metrics(labels);
592 global_metrics.remove("input_received_frames", labels);
593 global_metrics.remove("input_dropped_frames_jitter", labels);
594 global_metrics.remove("input_dropped_frames_error", labels);
595 global_metrics.remove("input_dropped_frames_resets", labels);
596 global_metrics.remove("input_queue_length_frames", labels);
597 global_metrics.remove("input_queue_duped_frames", labels);
599 global_metrics.remove("input_has_signal_bool", labels);
600 global_metrics.remove("input_is_connected_bool", labels);
601 global_metrics.remove("input_interlaced_bool", labels);
602 global_metrics.remove("input_width_pixels", labels);
603 global_metrics.remove("input_height_pixels", labels);
604 global_metrics.remove("input_frame_rate_nom", labels);
605 global_metrics.remove("input_frame_rate_den", labels);
606 global_metrics.remove("input_sample_rate_hz", labels);
610 vector<pair<string, string>> labels;
612 snprintf(card_name, sizeof(card_name), "%d", card_index);
613 labels.emplace_back("card", card_name);
616 case CardType::LIVE_CARD:
617 labels.emplace_back("cardtype", "live");
619 case CardType::FAKE_CAPTURE:
620 labels.emplace_back("cardtype", "fake");
622 case CardType::FFMPEG_INPUT:
623 labels.emplace_back("cardtype", "ffmpeg");
625 case CardType::CEF_INPUT:
626 labels.emplace_back("cardtype", "cef");
631 card->jitter_history.register_metrics(labels);
632 card->queue_length_policy.register_metrics(labels);
633 global_metrics.add("input_received_frames", labels, &card->metric_input_received_frames);
634 global_metrics.add("input_dropped_frames_jitter", labels, &card->metric_input_dropped_frames_jitter);
635 global_metrics.add("input_dropped_frames_error", labels, &card->metric_input_dropped_frames_error);
636 global_metrics.add("input_dropped_frames_resets", labels, &card->metric_input_resets);
637 global_metrics.add("input_queue_length_frames", labels, &card->metric_input_queue_length_frames, Metrics::TYPE_GAUGE);
638 global_metrics.add("input_queue_duped_frames", labels, &card->metric_input_duped_frames);
640 global_metrics.add("input_has_signal_bool", labels, &card->metric_input_has_signal_bool, Metrics::TYPE_GAUGE);
641 global_metrics.add("input_is_connected_bool", labels, &card->metric_input_is_connected_bool, Metrics::TYPE_GAUGE);
642 global_metrics.add("input_interlaced_bool", labels, &card->metric_input_interlaced_bool, Metrics::TYPE_GAUGE);
643 global_metrics.add("input_width_pixels", labels, &card->metric_input_width_pixels, Metrics::TYPE_GAUGE);
644 global_metrics.add("input_height_pixels", labels, &card->metric_input_height_pixels, Metrics::TYPE_GAUGE);
645 global_metrics.add("input_frame_rate_nom", labels, &card->metric_input_frame_rate_nom, Metrics::TYPE_GAUGE);
646 global_metrics.add("input_frame_rate_den", labels, &card->metric_input_frame_rate_den, Metrics::TYPE_GAUGE);
647 global_metrics.add("input_sample_rate_hz", labels, &card->metric_input_sample_rate_hz, Metrics::TYPE_GAUGE);
648 card->labels = labels;
651 void Mixer::set_output_card_internal(int card_index)
653 // We don't really need to take card_mutex, since we're in the mixer
654 // thread and don't mess with any queues (which is the only thing that happens
655 // from other threads), but it's probably the safest in the long run.
656 unique_lock<mutex> lock(card_mutex);
657 if (output_card_index != -1) {
658 // Switch the old card from output to input.
659 CaptureCard *old_card = &cards[output_card_index];
660 old_card->output->end_output();
662 // Stop the fake card that we put into place.
663 // This needs to _not_ happen under the mutex, to avoid deadlock
664 // (delivering the last frame needs to take the mutex).
665 CaptureInterface *fake_capture = old_card->capture.get();
667 fake_capture->stop_dequeue_thread();
669 old_card->capture = move(old_card->parked_capture); // TODO: reset the metrics
670 old_card->is_fake_capture = false;
671 old_card->capture->start_bm_capture();
673 if (card_index != -1) {
674 CaptureCard *card = &cards[card_index];
675 CaptureInterface *capture = card->capture.get();
676 // TODO: DeckLinkCapture::stop_dequeue_thread can actually take
677 // several seconds to complete (blocking on DisableVideoInput);
678 // see if we can maybe do it asynchronously.
680 capture->stop_dequeue_thread();
682 card->parked_capture = move(card->capture);
683 CaptureInterface *fake_capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio);
684 configure_card(card_index, fake_capture, CardType::FAKE_CAPTURE, card->output.release());
685 card->queue_length_policy.reset(card_index);
686 card->capture->start_bm_capture();
687 desired_output_video_mode = output_video_mode = card->output->pick_video_mode(desired_output_video_mode);
688 card->output->start_output(desired_output_video_mode, pts_int);
690 output_card_index = card_index;
691 output_jitter_history.clear();
696 int unwrap_timecode(uint16_t current_wrapped, int last)
698 uint16_t last_wrapped = last & 0xffff;
699 if (current_wrapped > last_wrapped) {
700 return (last & ~0xffff) | current_wrapped;
702 return 0x10000 + ((last & ~0xffff) | current_wrapped);
706 DeviceSpec card_index_to_device(unsigned card_index, unsigned num_cards)
708 if (card_index >= num_cards) {
709 return DeviceSpec{InputSourceType::FFMPEG_VIDEO_INPUT, card_index - num_cards};
711 return DeviceSpec{InputSourceType::CAPTURE_CARD, card_index};
717 void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
718 FrameAllocator::Frame video_frame, size_t video_offset, VideoFormat video_format,
719 FrameAllocator::Frame audio_frame, size_t audio_offset, AudioFormat audio_format)
721 DeviceSpec device = card_index_to_device(card_index, num_cards);
722 CaptureCard *card = &cards[card_index];
724 ++card->metric_input_received_frames;
725 card->metric_input_has_signal_bool = video_format.has_signal;
726 card->metric_input_is_connected_bool = video_format.is_connected;
727 card->metric_input_interlaced_bool = video_format.interlaced;
728 card->metric_input_width_pixels = video_format.width;
729 card->metric_input_height_pixels = video_format.height;
730 card->metric_input_frame_rate_nom = video_format.frame_rate_nom;
731 card->metric_input_frame_rate_den = video_format.frame_rate_den;
732 card->metric_input_sample_rate_hz = audio_format.sample_rate;
734 if (is_mode_scanning[card_index]) {
735 if (video_format.has_signal) {
736 // Found a stable signal, so stop scanning.
737 is_mode_scanning[card_index] = false;
739 static constexpr double switch_time_s = 0.1; // Should be enough time for the signal to stabilize.
740 steady_clock::time_point now = steady_clock::now();
741 double sec_since_last_switch = duration<double>(steady_clock::now() - last_mode_scan_change[card_index]).count();
742 if (sec_since_last_switch > switch_time_s) {
743 // It isn't this mode; try the next one.
744 mode_scanlist_index[card_index]++;
745 mode_scanlist_index[card_index] %= mode_scanlist[card_index].size();
746 cards[card_index].capture->set_video_mode(mode_scanlist[card_index][mode_scanlist_index[card_index]]);
747 last_mode_scan_change[card_index] = now;
752 int64_t frame_length = int64_t(TIMEBASE) * video_format.frame_rate_den / video_format.frame_rate_nom;
753 assert(frame_length > 0);
755 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;
756 if (num_samples > OUTPUT_FREQUENCY / 10 && card->type != CardType::FFMPEG_INPUT) {
757 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",
758 spec_to_string(device).c_str(), int(audio_frame.len), int(audio_offset),
759 timecode, int(video_frame.len), int(video_offset), video_format.id);
760 if (video_frame.owner) {
761 video_frame.owner->release_frame(video_frame);
763 if (audio_frame.owner) {
764 audio_frame.owner->release_frame(audio_frame);
769 int dropped_frames = 0;
770 if (card->last_timecode != -1) {
771 dropped_frames = unwrap_timecode(timecode, card->last_timecode) - card->last_timecode - 1;
774 // Number of samples per frame if we need to insert silence.
775 // (Could be nonintegral, but resampling will save us then.)
776 const int silence_samples = OUTPUT_FREQUENCY * video_format.frame_rate_den / video_format.frame_rate_nom;
778 if (dropped_frames > MAX_FPS * 2) {
779 fprintf(stderr, "%s lost more than two seconds (or time code jumping around; from 0x%04x to 0x%04x), resetting resampler\n",
780 spec_to_string(device).c_str(), card->last_timecode, timecode);
781 audio_mixer->reset_resampler(device);
783 ++card->metric_input_resets;
784 } else if (dropped_frames > 0) {
785 // Insert silence as needed.
786 fprintf(stderr, "%s dropped %d frame(s) (before timecode 0x%04x), inserting silence.\n",
787 spec_to_string(device).c_str(), dropped_frames, timecode);
788 card->metric_input_dropped_frames_error += dropped_frames;
792 success = audio_mixer->add_silence(device, silence_samples, dropped_frames);
796 if (num_samples > 0) {
797 audio_mixer->add_audio(device, audio_frame.data + audio_offset, num_samples, audio_format, audio_frame.received_timestamp);
799 // Audio for the MJPEG stream. We don't resample; audio that's not in 48 kHz
800 // just gets dropped for now.
802 // Only bother doing MJPEG encoding if there are any connected clients
803 // that want the stream.
804 if (httpd.get_num_connected_multicam_clients() > 0 ||
805 httpd.get_num_connected_siphon_clients(card_index) > 0) {
806 vector<int32_t> converted_samples = convert_audio_to_fixed32(audio_frame.data + audio_offset, num_samples, audio_format, 2);
807 lock_guard<mutex> lock(card_mutex);
808 if (card->new_raw_audio.empty()) {
809 card->new_raw_audio = move(converted_samples);
811 // For raw audio, we don't really synchronize audio and video;
812 // we just put the audio in frame by frame, and if a video frame is
813 // dropped, we still keep the audio, which means it will be added
814 // to the beginning of the next frame. It would probably be better
815 // to move the audio pts earlier to show this, but most players can
816 // live with some jitter, and in a lot of ways, it's much nicer for
817 // Futatabi to have all audio locked to a video frame.
818 card->new_raw_audio.insert(card->new_raw_audio.end(), converted_samples.begin(), converted_samples.end());
820 // Truncate to one second, just to be sure we don't have infinite buildup in case of weirdness.
821 if (card->new_raw_audio.size() > OUTPUT_FREQUENCY * 2) {
822 size_t excess_samples = card->new_raw_audio.size() - OUTPUT_FREQUENCY * 2;
823 card->new_raw_audio.erase(card->new_raw_audio.begin(), card->new_raw_audio.begin() + excess_samples);
829 // Done with the audio, so release it.
830 if (audio_frame.owner) {
831 audio_frame.owner->release_frame(audio_frame);
834 card->last_timecode = timecode;
836 PBOFrameAllocator::Userdata *userdata = (PBOFrameAllocator::Userdata *)video_frame.userdata;
837 if (card->type == CardType::FFMPEG_INPUT && userdata != nullptr) {
838 FFmpegCapture *ffmpeg_capture = static_cast<FFmpegCapture *>(card->capture.get());
839 userdata->has_last_subtitle = ffmpeg_capture->get_has_last_subtitle();
840 userdata->last_subtitle = ffmpeg_capture->get_last_subtitle();
843 size_t cbcr_width, cbcr_height, cbcr_offset, y_offset;
844 size_t expected_length = video_format.stride * (video_format.height + video_format.extra_lines_top + video_format.extra_lines_bottom);
845 if (userdata != nullptr && userdata->pixel_format == PixelFormat_8BitYCbCrPlanar) {
846 // The calculation above is wrong for planar Y'CbCr, so just override it.
847 assert(card->type == CardType::FFMPEG_INPUT);
848 assert(video_offset == 0);
849 expected_length = video_frame.len;
851 userdata->ycbcr_format = (static_cast<FFmpegCapture *>(card->capture.get()))->get_current_frame_ycbcr_format();
852 cbcr_width = video_format.width / userdata->ycbcr_format.chroma_subsampling_x;
853 cbcr_height = video_format.height / userdata->ycbcr_format.chroma_subsampling_y;
854 cbcr_offset = video_format.width * video_format.height;
857 // All the other Y'CbCr formats are 4:2:2.
858 cbcr_width = video_format.width / 2;
859 cbcr_height = video_format.height;
860 cbcr_offset = video_offset / 2;
861 y_offset = video_frame.size / 2 + video_offset / 2;
863 if (video_frame.len - video_offset == 0 ||
864 video_frame.len - video_offset != expected_length) {
865 if (video_frame.len != 0) {
866 printf("%s: Dropping video frame with wrong length (%zu; expected %zu)\n",
867 spec_to_string(device).c_str(), video_frame.len - video_offset, expected_length);
869 if (video_frame.owner) {
870 video_frame.owner->release_frame(video_frame);
873 // Still send on the information that we _had_ a frame, even though it's corrupted,
874 // so that pts can go up accordingly.
876 lock_guard<mutex> lock(card_mutex);
877 CaptureCard::NewFrame new_frame;
878 new_frame.frame = RefCountedFrame(FrameAllocator::Frame());
879 new_frame.length = frame_length;
880 new_frame.interlaced = false;
881 new_frame.dropped_frames = dropped_frames;
882 new_frame.received_timestamp = video_frame.received_timestamp;
883 card->new_frames.push_back(move(new_frame));
884 card->jitter_history.frame_arrived(video_frame.received_timestamp, frame_length, dropped_frames);
886 card->new_frames_changed.notify_all();
890 unsigned num_fields = video_format.interlaced ? 2 : 1;
891 steady_clock::time_point frame_upload_start;
892 bool interlaced_stride = false;
893 if (video_format.interlaced) {
894 // Send the two fields along as separate frames; the other side will need to add
895 // a deinterlacer to actually get this right.
896 assert(video_format.height % 2 == 0);
897 video_format.height /= 2;
899 assert(frame_length % 2 == 0);
902 if (video_format.second_field_start == 1) {
903 interlaced_stride = true;
905 frame_upload_start = steady_clock::now();
907 assert(userdata != nullptr);
908 userdata->last_interlaced = video_format.interlaced;
909 userdata->last_has_signal = video_format.has_signal;
910 userdata->last_is_connected = video_format.is_connected;
911 userdata->last_frame_rate_nom = video_format.frame_rate_nom;
912 userdata->last_frame_rate_den = video_format.frame_rate_den;
913 RefCountedFrame frame(video_frame);
915 // Upload the textures.
916 for (unsigned field = 0; field < num_fields; ++field) {
917 // Put the actual texture upload in a lambda that is executed in the main thread.
918 // It is entirely possible to do this in the same thread (and it might even be
919 // faster, depending on the GPU and driver), but it appears to be trickling
920 // driver bugs very easily.
922 // Note that this means we must hold on to the actual frame data in <userdata>
923 // until the upload command is run, but we hold on to <frame> much longer than that
924 // (in fact, all the way until we no longer use the texture in rendering).
925 auto upload_func = [this, field, video_format, y_offset, video_offset, cbcr_offset, cbcr_width, cbcr_height, interlaced_stride, userdata]() {
926 unsigned field_start_line;
928 field_start_line = video_format.second_field_start;
930 field_start_line = video_format.extra_lines_top;
933 // For anything not FRAME_FORMAT_YCBCR_10BIT, v210_width will be nonsensical but not used.
934 size_t v210_width = video_format.stride / sizeof(uint32_t);
935 ensure_texture_resolution(userdata, field, video_format.width, video_format.height, cbcr_width, cbcr_height, v210_width);
937 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, userdata->pbo);
940 switch (userdata->pixel_format) {
941 case PixelFormat_10BitYCbCr: {
942 size_t field_start = video_offset + video_format.stride * field_start_line;
943 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);
944 v210_converter->convert(userdata->tex_v210[field], userdata->tex_444[field], video_format.width, video_format.height);
947 case PixelFormat_8BitYCbCr: {
948 size_t field_y_start = y_offset + video_format.width * field_start_line;
949 size_t field_cbcr_start = cbcr_offset + cbcr_width * field_start_line * sizeof(uint16_t);
951 // Make up our own strides, since we are interleaving.
952 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);
953 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);
956 case PixelFormat_8BitYCbCrPlanar: {
957 assert(field_start_line == 0); // We don't really support interlaced here.
958 size_t field_y_start = y_offset;
959 size_t field_cb_start = cbcr_offset;
960 size_t field_cr_start = cbcr_offset + cbcr_width * cbcr_height;
962 // Make up our own strides, since we are interleaving.
963 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);
964 upload_texture(userdata->tex_cb[field], cbcr_width, cbcr_height, cbcr_width, interlaced_stride, GL_RED, GL_UNSIGNED_BYTE, field_cb_start);
965 upload_texture(userdata->tex_cr[field], cbcr_width, cbcr_height, cbcr_width, interlaced_stride, GL_RED, GL_UNSIGNED_BYTE, field_cr_start);
968 case PixelFormat_8BitBGRA: {
969 size_t field_start = video_offset + video_format.stride * field_start_line;
970 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);
971 // These could be asked to deliver mipmaps at any time.
972 glBindTexture(GL_TEXTURE_2D, userdata->tex_rgba[field]);
974 glGenerateMipmap(GL_TEXTURE_2D);
976 glBindTexture(GL_TEXTURE_2D, 0);
984 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
989 // Don't upload the second field as fast as we can; wait until
990 // the field time has approximately passed. (Otherwise, we could
991 // get timing jitter against the other sources, and possibly also
992 // against the video display, although the latter is not as critical.)
993 // This requires our system clock to be reasonably close to the
994 // video clock, but that's not an unreasonable assumption.
995 steady_clock::time_point second_field_start = frame_upload_start +
996 nanoseconds(frame_length * 1000000000 / TIMEBASE);
997 this_thread::sleep_until(second_field_start);
1001 lock_guard<mutex> lock(card_mutex);
1002 CaptureCard::NewFrame new_frame;
1003 new_frame.frame = frame;
1004 new_frame.length = frame_length;
1005 new_frame.field = field;
1006 new_frame.interlaced = video_format.interlaced;
1007 new_frame.upload_func = upload_func;
1008 new_frame.dropped_frames = dropped_frames;
1009 new_frame.received_timestamp = video_frame.received_timestamp; // Ignore the audio timestamp.
1010 new_frame.video_format = video_format;
1011 new_frame.y_offset = y_offset;
1012 new_frame.cbcr_offset = cbcr_offset;
1013 if (card->type == CardType::FFMPEG_INPUT) {
1014 FFmpegCapture *ffmpeg_capture = static_cast<FFmpegCapture *>(card->capture.get());
1015 new_frame.neutral_color = ffmpeg_capture->get_last_neutral_color();
1017 card->new_frames.push_back(move(new_frame));
1018 card->jitter_history.frame_arrived(video_frame.received_timestamp, frame_length, dropped_frames);
1019 card->may_have_dropped_last_frame = false;
1021 card->new_frames_changed.notify_all();
1025 void Mixer::bm_hotplug_add(libusb_device *dev)
1027 lock_guard<mutex> lock(hotplug_mutex);
1028 hotplugged_cards.push_back(dev);
1031 void Mixer::bm_hotplug_remove(unsigned card_index)
1033 cards[card_index].new_frames_changed.notify_all();
1036 void Mixer::thread_func()
1038 pthread_setname_np(pthread_self(), "Mixer_OpenGL");
1040 eglBindAPI(EGL_OPENGL_API);
1041 QOpenGLContext *context = create_context(mixer_surface);
1042 if (!make_current(context, mixer_surface)) {
1047 // Start the actual capture. (We don't want to do it before we're actually ready
1048 // to process output frames.)
1049 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
1050 if (int(card_index) != output_card_index) {
1051 cards[card_index].capture->start_bm_capture();
1055 BasicStats basic_stats(/*verbose=*/true, /*use_opengl=*/true);
1056 int stats_dropped_frames = 0;
1058 while (!should_quit) {
1059 if (desired_output_card_index != output_card_index) {
1060 set_output_card_internal(desired_output_card_index);
1062 if (output_card_index != -1 &&
1063 desired_output_video_mode != output_video_mode) {
1064 DeckLinkOutput *output = cards[output_card_index].output.get();
1065 output->end_output();
1066 desired_output_video_mode = output_video_mode = output->pick_video_mode(desired_output_video_mode);
1067 output->start_output(desired_output_video_mode, pts_int);
1070 CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS];
1071 bool has_new_frame[MAX_VIDEO_CARDS] = { false };
1073 bool master_card_is_output;
1074 unsigned master_card_index;
1075 if (output_card_index != -1) {
1076 master_card_is_output = true;
1077 master_card_index = output_card_index;
1079 master_card_is_output = false;
1080 master_card_index = theme->map_signal_to_card(master_clock_channel);
1081 assert(master_card_index < num_cards + num_video_inputs);
1084 vector<int32_t> raw_audio[MAX_VIDEO_CARDS]; // For MJPEG encoding.
1085 OutputFrameInfo output_frame_info = get_one_frame_from_each_card(master_card_index, master_card_is_output, new_frames, has_new_frame, raw_audio);
1086 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);
1087 stats_dropped_frames += output_frame_info.dropped_frames;
1089 handle_hotplugged_cards();
1091 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
1092 DeviceSpec device = card_index_to_device(card_index, num_cards);
1093 if (card_index == master_card_index || !has_new_frame[card_index]) {
1096 if (new_frames[card_index].frame->len == 0) {
1097 ++new_frames[card_index].dropped_frames;
1099 if (new_frames[card_index].dropped_frames > 0) {
1100 printf("%s dropped %d frames before this\n",
1101 spec_to_string(device).c_str(), int(new_frames[card_index].dropped_frames));
1105 // If the first card is reporting a corrupted or otherwise dropped frame,
1106 // just increase the pts (skipping over this frame) and don't try to compute anything new.
1107 if (!master_card_is_output && new_frames[master_card_index].frame->len == 0) {
1108 ++stats_dropped_frames;
1109 pts_int += new_frames[master_card_index].length;
1113 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
1114 if (!has_new_frame[card_index] || new_frames[card_index].frame->len == 0)
1117 CaptureCard::NewFrame *new_frame = &new_frames[card_index];
1118 assert(new_frame->frame != nullptr);
1119 insert_new_frame(new_frame->frame, new_frame->field, new_frame->interlaced, card_index, &input_state);
1122 // The new texture might need uploading before use.
1123 if (new_frame->upload_func) {
1124 new_frame->upload_func();
1125 new_frame->upload_func = nullptr;
1128 // Only set the white balance if it actually changed. This means that the user
1129 // is free to override the white balance in a video with no white balance information
1130 // actually set (ie. r=g=b=1 all the time), or one where the white point is wrong,
1131 // but frame-to-frame decisions will be heeded. We do this pretty much as late
1132 // as possible (ie., after picking out the frame from the buffer), so that we are sure
1133 // that the change takes effect on exactly the right frame.
1134 if (fabs(new_frame->neutral_color.r - last_received_neutral_color[card_index].r) > 1e-3 ||
1135 fabs(new_frame->neutral_color.g - last_received_neutral_color[card_index].g) > 1e-3 ||
1136 fabs(new_frame->neutral_color.b - last_received_neutral_color[card_index].b) > 1e-3) {
1137 theme->set_wb_for_card(card_index, new_frame->neutral_color.r, new_frame->neutral_color.g, new_frame->neutral_color.b);
1138 last_received_neutral_color[card_index] = new_frame->neutral_color;
1141 if (new_frame->frame->data_copy != nullptr && mjpeg_encoder->should_encode_mjpeg_for_card(card_index)) {
1142 RGBTriplet neutral_color = theme->get_white_balance_for_card(card_index);
1143 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);
1148 int64_t frame_duration = output_frame_info.frame_duration;
1149 render_one_frame(frame_duration);
1151 lock_guard<mutex> lock(frame_num_mutex);
1154 frame_num_updated.notify_all();
1155 pts_int += frame_duration;
1157 basic_stats.update(frame_num, stats_dropped_frames);
1158 // if (frame_num % 100 == 0) chain->print_phase_timing();
1160 if (should_cut.exchange(false)) { // Test and clear.
1161 video_encoder->do_cut(frame_num);
1165 // Reset every 100 frames, so that local variations in frame times
1166 // (especially for the first few frames, when the shaders are
1167 // compiled etc.) don't make it hard to measure for the entire
1168 // remaining duration of the program.
1169 if (frame == 10000) {
1177 resource_pool->clean_context();
1180 bool Mixer::input_card_is_master_clock(unsigned card_index, unsigned master_card_index) const
1182 if (output_card_index != -1) {
1183 // The output card (ie., cards[output_card_index].output) is the master clock,
1184 // so no input card (ie., cards[card_index].capture) is.
1187 return (card_index == master_card_index);
1190 void Mixer::trim_queue(CaptureCard *card, size_t safe_queue_length)
1192 // Count the number of frames in the queue, including any frames
1193 // we dropped. It's hard to know exactly how we should deal with
1194 // dropped (corrupted) input frames; they don't help our goal of
1195 // avoiding starvation, but they still add to the problem of latency.
1196 // Since dropped frames is going to mean a bump in the signal anyway,
1197 // we err on the side of having more stable latency instead.
1198 unsigned queue_length = 0;
1199 for (const CaptureCard::NewFrame &frame : card->new_frames) {
1200 queue_length += frame.dropped_frames + 1;
1203 // If needed, drop frames until the queue is below the safe limit.
1204 // We prefer to drop from the head, because all else being equal,
1205 // we'd like more recent frames (less latency).
1206 unsigned dropped_frames = 0;
1207 while (queue_length > safe_queue_length) {
1208 assert(!card->new_frames.empty());
1209 assert(queue_length > card->new_frames.front().dropped_frames);
1210 queue_length -= card->new_frames.front().dropped_frames;
1212 if (queue_length <= safe_queue_length) {
1213 // No need to drop anything.
1217 card->new_frames.pop_front();
1218 card->new_frames_changed.notify_all();
1222 if (queue_length == 0 && card->is_cef_capture) {
1223 card->may_have_dropped_last_frame = true;
1227 card->metric_input_dropped_frames_jitter += dropped_frames;
1228 card->metric_input_queue_length_frames = queue_length;
1231 if (dropped_frames > 0) {
1232 fprintf(stderr, "Card %u dropped %u frame(s) to keep latency down.\n",
1233 card_index, dropped_frames);
1238 pair<string, string> Mixer::get_channels_json()
1241 for (int channel_idx = 0; channel_idx < theme->get_num_channels(); ++channel_idx) {
1242 Channel *channel = ret.add_channel();
1243 channel->set_index(channel_idx + 2);
1244 channel->set_name(theme->get_channel_name(channel_idx + 2));
1245 channel->set_color(theme->get_channel_color(channel_idx + 2));
1248 google::protobuf::util::MessageToJsonString(ret, &contents); // Ignore any errors.
1249 return make_pair(contents, "text/json");
1252 pair<string, string> Mixer::get_channel_color_http(unsigned channel_idx)
1254 return make_pair(theme->get_channel_color(channel_idx), "text/plain");
1257 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])
1259 OutputFrameInfo output_frame_info;
1261 unique_lock<mutex> lock(card_mutex, defer_lock);
1262 if (master_card_is_output) {
1263 // Clocked to the output, so wait for it to be ready for the next frame.
1264 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);
1267 // Wait for the master card to have a new frame.
1268 // TODO: Add a timeout.
1269 output_frame_info.is_preroll = false;
1271 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(); });
1274 if (master_card_is_output) {
1275 handle_hotplugged_cards();
1276 } else if (cards[master_card_index].new_frames.empty()) {
1277 // We were woken up, but not due to a new frame. Deal with it
1278 // and then restart.
1279 assert(cards[master_card_index].capture->get_disconnected());
1280 handle_hotplugged_cards();
1285 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
1286 CaptureCard *card = &cards[card_index];
1287 if (card->new_frames.empty()) { // Starvation.
1288 ++card->metric_input_duped_frames;
1290 if (card->is_cef_capture && card->may_have_dropped_last_frame) {
1291 // Unlike other sources, CEF is not guaranteed to send us a steady
1292 // stream of frames, so we'll have to ask it to repaint the frame
1293 // we dropped. (may_have_dropped_last_frame is set whenever we
1294 // trim the queue completely away, and cleared when we actually
1295 // get a new frame.)
1296 ((CEFCapture *)card->capture.get())->request_new_frame(/*ignore_if_locked=*/true);
1300 new_frames[card_index] = move(card->new_frames.front());
1301 has_new_frame[card_index] = true;
1302 card->new_frames.pop_front();
1303 card->new_frames_changed.notify_all();
1306 raw_audio[card_index] = move(card->new_raw_audio);
1309 if (!master_card_is_output) {
1310 output_frame_info.frame_timestamp = new_frames[master_card_index].received_timestamp;
1311 output_frame_info.dropped_frames = new_frames[master_card_index].dropped_frames;
1312 output_frame_info.frame_duration = new_frames[master_card_index].length;
1315 if (!output_frame_info.is_preroll) {
1316 output_jitter_history.frame_arrived(output_frame_info.frame_timestamp, output_frame_info.frame_duration, output_frame_info.dropped_frames);
1319 for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
1320 CaptureCard *card = &cards[card_index];
1321 if (has_new_frame[card_index] &&
1322 !input_card_is_master_clock(card_index, master_card_index) &&
1323 !output_frame_info.is_preroll) {
1324 card->queue_length_policy.update_policy(
1325 output_frame_info.frame_timestamp,
1326 card->jitter_history.get_expected_next_frame(),
1327 new_frames[master_card_index].length,
1328 output_frame_info.frame_duration,
1329 card->jitter_history.estimate_max_jitter(),
1330 output_jitter_history.estimate_max_jitter());
1331 trim_queue(card, min<int>(global_flags.max_input_queue_frames,
1332 card->queue_length_policy.get_safe_queue_length()));
1336 // This might get off by a fractional sample when changing master card
1337 // between ones with different frame rates, but that's fine.
1338 int num_samples_times_timebase = OUTPUT_FREQUENCY * output_frame_info.frame_duration + fractional_samples;
1339 output_frame_info.num_samples = num_samples_times_timebase / TIMEBASE;
1340 fractional_samples = num_samples_times_timebase % TIMEBASE;
1341 assert(output_frame_info.num_samples >= 0);
1343 return output_frame_info;
1346 void Mixer::handle_hotplugged_cards()
1348 // Check for cards that have been disconnected since last frame.
1349 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1350 CaptureCard *card = &cards[card_index];
1351 if (card->capture->get_disconnected()) {
1352 fprintf(stderr, "Card %u went away, replacing with a fake card.\n", card_index);
1353 FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio);
1354 configure_card(card_index, capture, CardType::FAKE_CAPTURE, /*output=*/nullptr);
1355 card->queue_length_policy.reset(card_index);
1356 card->capture->start_bm_capture();
1360 // Check for cards that have been connected since last frame.
1361 vector<libusb_device *> hotplugged_cards_copy;
1363 lock_guard<mutex> lock(hotplug_mutex);
1364 swap(hotplugged_cards, hotplugged_cards_copy);
1366 for (libusb_device *new_dev : hotplugged_cards_copy) {
1367 // Look for a fake capture card where we can stick this in.
1368 int free_card_index = -1;
1369 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1370 if (cards[card_index].is_fake_capture) {
1371 free_card_index = card_index;
1376 if (free_card_index == -1) {
1377 fprintf(stderr, "New card plugged in, but no free slots -- ignoring.\n");
1378 libusb_unref_device(new_dev);
1380 // BMUSBCapture takes ownership.
1381 fprintf(stderr, "New card plugged in, choosing slot %d.\n", free_card_index);
1382 CaptureCard *card = &cards[free_card_index];
1383 BMUSBCapture *capture = new BMUSBCapture(free_card_index, new_dev);
1384 configure_card(free_card_index, capture, CardType::LIVE_CARD, /*output=*/nullptr);
1385 card->queue_length_policy.reset(free_card_index);
1386 capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, free_card_index));
1387 capture->start_bm_capture();
1393 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)
1395 // Resample the audio as needed, including from previously dropped frames.
1396 assert(num_cards > 0);
1397 for (unsigned frame_num = 0; frame_num < dropped_frames + 1; ++frame_num) {
1398 const bool dropped_frame = (frame_num != dropped_frames);
1400 // Signal to the audio thread to process this frame.
1401 // Note that if the frame is a dropped frame, we signal that
1402 // we don't want to use this frame as base for adjusting
1403 // the resampler rate. The reason for this is that the timing
1404 // of these frames is often way too late; they typically don't
1405 // “arrive” before we synthesize them. Thus, we could end up
1406 // in a situation where we have inserted e.g. five audio frames
1407 // into the queue before we then start pulling five of them
1408 // back out. This makes ResamplingQueue overestimate the delay,
1409 // causing undue resampler changes. (We _do_ use the last,
1410 // non-dropped frame; perhaps we should just discard that as well,
1411 // since dropped frames are expected to be rare, and it might be
1412 // better to just wait until we have a slightly more normal situation).
1413 lock_guard<mutex> lock(audio_mutex);
1414 bool adjust_rate = !dropped_frame && !is_preroll;
1415 audio_task_queue.push(AudioTask{pts_int, num_samples_per_frame, adjust_rate, frame_timestamp});
1416 audio_task_queue_changed.notify_one();
1418 if (dropped_frame) {
1419 // For dropped frames, increase the pts. Note that if the format changed
1420 // in the meantime, we have no way of detecting that; we just have to
1421 // assume the frame length is always the same.
1422 pts_int += length_per_frame;
1427 void Mixer::render_one_frame(int64_t duration)
1429 // Determine the time code for this frame before we start rendering.
1430 string timecode_text = timecode_renderer->get_timecode_text(double(pts_int) / TIMEBASE, frame_num);
1431 if (display_timecode_on_stdout) {
1432 printf("Timecode: '%s'\n", timecode_text.c_str());
1435 // Update Y'CbCr settings for all cards.
1437 lock_guard<mutex> lock(card_mutex);
1438 for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
1439 YCbCrInterpretation *interpretation = &ycbcr_interpretation[card_index];
1440 input_state.ycbcr_coefficients_auto[card_index] = interpretation->ycbcr_coefficients_auto;
1441 input_state.ycbcr_coefficients[card_index] = interpretation->ycbcr_coefficients;
1442 input_state.full_range[card_index] = interpretation->full_range;
1446 // Get the main chain from the theme, and set its state immediately.
1447 Theme::Chain theme_main_chain = theme->get_chain(0, pts(), global_flags.width, global_flags.height, input_state);
1448 EffectChain *chain = theme_main_chain.chain;
1449 theme_main_chain.setup_chain();
1450 //theme_main_chain.chain->enable_phase_timing(true);
1452 // If HDMI/SDI output is active and the user has requested auto mode,
1453 // its mode overrides the existing Y'CbCr setting for the chain.
1454 YCbCrLumaCoefficients ycbcr_output_coefficients;
1455 if (global_flags.ycbcr_auto_coefficients && output_card_index != -1) {
1456 ycbcr_output_coefficients = cards[output_card_index].output->preferred_ycbcr_coefficients();
1458 ycbcr_output_coefficients = global_flags.ycbcr_rec709_coefficients ? YCBCR_REC_709 : YCBCR_REC_601;
1461 // TODO: Reduce the duplication against theme.cpp.
1462 YCbCrFormat output_ycbcr_format;
1463 output_ycbcr_format.chroma_subsampling_x = 1;
1464 output_ycbcr_format.chroma_subsampling_y = 1;
1465 output_ycbcr_format.luma_coefficients = ycbcr_output_coefficients;
1466 output_ycbcr_format.full_range = false;
1467 output_ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
1468 chain->change_ycbcr_output_format(output_ycbcr_format);
1470 // Render main chain. If we're using zerocopy Quick Sync encoding
1471 // (the default case), we take an extra copy of the created outputs,
1472 // so that we can display it back to the screen later (it's less memory
1473 // bandwidth than writing and reading back an RGBA texture, even at 16-bit).
1474 // Ideally, we'd like to avoid taking copies and just use the main textures
1475 // for display as well, but they're just views into VA-API memory and must be
1476 // unmapped during encoding, so we can't use them for display, unfortunately.
1477 GLuint y_tex, cbcr_full_tex, cbcr_tex;
1478 GLuint y_copy_tex, cbcr_copy_tex = 0;
1479 GLuint y_display_tex, cbcr_display_tex;
1480 GLenum y_type = (global_flags.x264_bit_depth > 8) ? GL_R16 : GL_R8;
1481 GLenum cbcr_type = (global_flags.x264_bit_depth > 8) ? GL_RG16 : GL_RG8;
1482 const bool is_zerocopy = video_encoder->is_zerocopy();
1484 cbcr_full_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width, global_flags.height);
1485 y_copy_tex = resource_pool->create_2d_texture(y_type, global_flags.width, global_flags.height);
1486 cbcr_copy_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width / 2, global_flags.height / 2);
1488 y_display_tex = y_copy_tex;
1489 cbcr_display_tex = cbcr_copy_tex;
1491 // y_tex and cbcr_tex will be given by VideoEncoder.
1493 cbcr_full_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width, global_flags.height);
1494 y_tex = resource_pool->create_2d_texture(y_type, global_flags.width, global_flags.height);
1495 cbcr_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width / 2, global_flags.height / 2);
1497 y_display_tex = y_tex;
1498 cbcr_display_tex = cbcr_tex;
1501 const int64_t av_delay = lrint(global_flags.audio_queue_length_ms * 0.001 * TIMEBASE); // Corresponds to the delay in ResamplingQueue.
1502 bool got_frame = video_encoder->begin_frame(pts_int + av_delay, duration, ycbcr_output_coefficients, theme_main_chain.input_frames, &y_tex, &cbcr_tex);
1507 fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex, y_copy_tex);
1509 fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex);
1512 chain->render_to_fbo(fbo, global_flags.width, global_flags.height);
1514 if (display_timecode_in_stream) {
1515 // Render the timecode on top.
1516 timecode_renderer->render_timecode(fbo, timecode_text);
1519 resource_pool->release_fbo(fbo);
1522 chroma_subsampler->subsample_chroma(cbcr_full_tex, global_flags.width, global_flags.height, cbcr_tex, cbcr_copy_tex);
1524 chroma_subsampler->subsample_chroma(cbcr_full_tex, global_flags.width, global_flags.height, cbcr_tex);
1526 if (output_card_index != -1) {
1527 cards[output_card_index].output->send_frame(y_tex, cbcr_full_tex, ycbcr_output_coefficients, theme_main_chain.input_frames, pts_int, duration);
1529 resource_pool->release_2d_texture(cbcr_full_tex);
1531 // Set the right state for the Y' and CbCr textures we use for display.
1532 glBindFramebuffer(GL_FRAMEBUFFER, 0);
1533 glBindTexture(GL_TEXTURE_2D, y_display_tex);
1534 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1535 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1536 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1538 glBindTexture(GL_TEXTURE_2D, cbcr_display_tex);
1539 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
1540 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
1541 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
1543 RefCountedGLsync fence = video_encoder->end_frame();
1545 // The live frame pieces the Y'CbCr texture copies back into RGB and displays them.
1546 // It owns y_display_tex and cbcr_display_tex now (whichever textures they are).
1547 DisplayFrame live_frame;
1548 live_frame.chain = display_chain.get();
1549 live_frame.setup_chain = [this, y_display_tex, cbcr_display_tex]{
1550 display_input->set_texture_num(0, y_display_tex);
1551 display_input->set_texture_num(1, cbcr_display_tex);
1553 live_frame.ready_fence = fence;
1554 live_frame.input_frames = {};
1555 live_frame.temp_textures = { y_display_tex, cbcr_display_tex };
1556 output_channel[OUTPUT_LIVE].output_frame(move(live_frame));
1558 // Set up preview and any additional channels.
1559 for (int i = 1; i < theme->get_num_channels() + 2; ++i) {
1560 DisplayFrame display_frame;
1561 Theme::Chain chain = theme->get_chain(i, pts(), global_flags.width, global_flags.height, input_state); // FIXME: dimensions
1562 display_frame.chain = move(chain.chain);
1563 display_frame.setup_chain = move(chain.setup_chain);
1564 display_frame.ready_fence = fence;
1565 display_frame.input_frames = move(chain.input_frames);
1566 display_frame.temp_textures = {};
1567 output_channel[i].output_frame(move(display_frame));
1571 void Mixer::audio_thread_func()
1573 pthread_setname_np(pthread_self(), "Mixer_Audio");
1575 while (!should_quit) {
1579 unique_lock<mutex> lock(audio_mutex);
1580 audio_task_queue_changed.wait(lock, [this]{ return should_quit || !audio_task_queue.empty(); });
1584 task = audio_task_queue.front();
1585 audio_task_queue.pop();
1588 ResamplingQueue::RateAdjustmentPolicy rate_adjustment_policy =
1589 task.adjust_rate ? ResamplingQueue::ADJUST_RATE : ResamplingQueue::DO_NOT_ADJUST_RATE;
1590 vector<float> samples_out = audio_mixer->get_output(
1591 task.frame_timestamp,
1593 rate_adjustment_policy);
1595 // Send the samples to the sound card, then add them to the output.
1597 alsa->write(samples_out);
1599 if (output_card_index != -1) {
1600 const int64_t av_delay = lrint(global_flags.audio_queue_length_ms * 0.001 * TIMEBASE); // Corresponds to the delay in ResamplingQueue.
1601 cards[output_card_index].output->send_audio(task.pts_int + av_delay, samples_out);
1603 video_encoder->add_audio(task.pts_int, move(samples_out));
1607 void Mixer::release_display_frame(DisplayFrame *frame)
1609 for (GLuint texnum : frame->temp_textures) {
1610 resource_pool->release_2d_texture(texnum);
1612 frame->temp_textures.clear();
1613 frame->ready_fence.reset();
1614 frame->input_frames.clear();
1619 mixer_thread = thread(&Mixer::thread_func, this);
1620 audio_thread = thread(&Mixer::audio_thread_func, this);
1626 audio_task_queue_changed.notify_one();
1627 mixer_thread.join();
1628 audio_thread.join();
1631 void Mixer::transition_clicked(int transition_num)
1633 theme->transition_clicked(transition_num, pts());
1636 void Mixer::channel_clicked(int preview_num)
1638 theme->channel_clicked(preview_num);
1641 YCbCrInterpretation Mixer::get_input_ycbcr_interpretation(unsigned card_index) const
1643 lock_guard<mutex> lock(card_mutex);
1644 return ycbcr_interpretation[card_index];
1647 void Mixer::set_input_ycbcr_interpretation(unsigned card_index, const YCbCrInterpretation &interpretation)
1649 lock_guard<mutex> lock(card_mutex);
1650 ycbcr_interpretation[card_index] = interpretation;
1653 void Mixer::start_mode_scanning(unsigned card_index)
1655 assert(card_index < num_cards);
1656 if (is_mode_scanning[card_index]) {
1659 is_mode_scanning[card_index] = true;
1660 mode_scanlist[card_index].clear();
1661 for (const auto &mode : cards[card_index].capture->get_available_video_modes()) {
1662 mode_scanlist[card_index].push_back(mode.first);
1664 assert(!mode_scanlist[card_index].empty());
1665 mode_scanlist_index[card_index] = 0;
1666 cards[card_index].capture->set_video_mode(mode_scanlist[card_index][0]);
1667 last_mode_scan_change[card_index] = steady_clock::now();
1670 map<uint32_t, VideoMode> Mixer::get_available_output_video_modes() const
1672 assert(desired_output_card_index != -1);
1673 lock_guard<mutex> lock(card_mutex);
1674 return cards[desired_output_card_index].output->get_available_video_modes();
1677 string Mixer::get_ffmpeg_filename(unsigned card_index) const
1679 assert(card_index >= num_cards && card_index < num_cards + num_video_inputs);
1680 return ((FFmpegCapture *)(cards[card_index].capture.get()))->get_filename();
1683 void Mixer::set_ffmpeg_filename(unsigned card_index, const string &filename) {
1684 assert(card_index >= num_cards && card_index < num_cards + num_video_inputs);
1685 ((FFmpegCapture *)(cards[card_index].capture.get()))->change_filename(filename);
1688 void Mixer::wait_for_next_frame()
1690 unique_lock<mutex> lock(frame_num_mutex);
1691 unsigned old_frame_num = frame_num;
1692 frame_num_updated.wait_for(lock, seconds(1), // Timeout is just in case.
1693 [old_frame_num, this]{ return this->frame_num > old_frame_num; });
1696 Mixer::OutputChannel::~OutputChannel()
1698 if (has_current_frame) {
1699 parent->release_display_frame(¤t_frame);
1701 if (has_ready_frame) {
1702 parent->release_display_frame(&ready_frame);
1706 void Mixer::OutputChannel::output_frame(DisplayFrame &&frame)
1708 // Store this frame for display. Remove the ready frame if any
1709 // (it was seemingly never used).
1711 lock_guard<mutex> lock(frame_mutex);
1712 if (has_ready_frame) {
1713 parent->release_display_frame(&ready_frame);
1715 ready_frame = move(frame);
1716 has_ready_frame = true;
1718 // Call the callbacks under the mutex (they should be short),
1719 // so that we don't race against a callback removal.
1720 for (const auto &key_and_callback : new_frame_ready_callbacks) {
1721 key_and_callback.second();
1725 // Reduce the number of callbacks by filtering duplicates. The reason
1726 // why we bother doing this is that Qt seemingly can get into a state
1727 // where its builds up an essentially unbounded queue of signals,
1728 // consuming more and more memory, and there's no good way of collapsing
1729 // user-defined signals or limiting the length of the queue.
1730 if (transition_names_updated_callback) {
1731 vector<string> transition_names = global_mixer->get_transition_names();
1732 bool changed = false;
1733 if (transition_names.size() != last_transition_names.size()) {
1736 for (unsigned i = 0; i < transition_names.size(); ++i) {
1737 if (transition_names[i] != last_transition_names[i]) {
1744 transition_names_updated_callback(transition_names);
1745 last_transition_names = transition_names;
1748 if (name_updated_callback) {
1749 string name = global_mixer->get_channel_name(channel);
1750 if (name != last_name) {
1751 name_updated_callback(name);
1755 if (color_updated_callback) {
1756 string color = global_mixer->get_channel_color(channel);
1757 if (color != last_color) {
1758 color_updated_callback(color);
1764 bool Mixer::OutputChannel::get_display_frame(DisplayFrame *frame)
1766 lock_guard<mutex> lock(frame_mutex);
1767 if (!has_current_frame && !has_ready_frame) {
1771 if (has_current_frame && has_ready_frame) {
1772 // We have a new ready frame. Toss the current one.
1773 parent->release_display_frame(¤t_frame);
1774 has_current_frame = false;
1776 if (has_ready_frame) {
1777 assert(!has_current_frame);
1778 current_frame = move(ready_frame);
1779 ready_frame.ready_fence.reset(); // Drop the refcount.
1780 ready_frame.input_frames.clear(); // Drop the refcounts.
1781 has_current_frame = true;
1782 has_ready_frame = false;
1785 *frame = current_frame;
1789 void Mixer::OutputChannel::add_frame_ready_callback(void *key, Mixer::new_frame_ready_callback_t callback)
1791 lock_guard<mutex> lock(frame_mutex);
1792 new_frame_ready_callbacks[key] = callback;
1795 void Mixer::OutputChannel::remove_frame_ready_callback(void *key)
1797 lock_guard<mutex> lock(frame_mutex);
1798 new_frame_ready_callbacks.erase(key);
1801 void Mixer::OutputChannel::set_transition_names_updated_callback(Mixer::transition_names_updated_callback_t callback)
1803 transition_names_updated_callback = callback;
1806 void Mixer::OutputChannel::set_name_updated_callback(Mixer::name_updated_callback_t callback)
1808 name_updated_callback = callback;
1811 void Mixer::OutputChannel::set_color_updated_callback(Mixer::color_updated_callback_t callback)
1813 color_updated_callback = callback;
1816 mutex RefCountedGLsync::fence_lock;