git.sesse.net Git - nageru/blob - decklink_output.cpp

   1 #include <movit/effect_util.h>
   2 #include <movit/util.h>
   3 #include <movit/resource_pool.h>  // Must be above the Xlib includes.
   4 #include <pthread.h>
   5
   6 #include <epoxy/egl.h>
   7
   8 #include "chroma_subsampler.h"
   9 #include "decklink_output.h"
  10 #include "decklink_util.h"
  11 #include "flags.h"
  12 #include "print_latency.h"
  13 #include "timebase.h"
  14 #include "v210_converter.h"
  15
  16 using namespace movit;
  17 using namespace std;
  18 using namespace std::chrono;
  19
  20 namespace {
  21
  22 // This class can be deleted during regular use, so make all the metrics static.
  23 bool metrics_inited = false;
  24 LatencyHistogram latency_histogram;
  25 atomic<int64_t> metric_decklink_output_width_pixels{-1};
  26 atomic<int64_t> metric_decklink_output_height_pixels{-1};
  27 atomic<int64_t> metric_decklink_output_frame_rate_den{-1};
  28 atomic<int64_t> metric_decklink_output_frame_rate_nom{-1};
  29 atomic<int64_t> metric_decklink_output_inflight_frames{0};
  30 atomic<int64_t> metric_decklink_output_color_mismatch_frames{0};
  31
  32 atomic<int64_t> metric_decklink_output_scheduled_frames_dropped{0};
  33 atomic<int64_t> metric_decklink_output_scheduled_frames_late{0};
  34 atomic<int64_t> metric_decklink_output_scheduled_frames_normal{0};
  35 atomic<int64_t> metric_decklink_output_scheduled_frames_preroll{0};
  36
  37 atomic<int64_t> metric_decklink_output_completed_frames_completed{0};
  38 atomic<int64_t> metric_decklink_output_completed_frames_dropped{0};
  39 atomic<int64_t> metric_decklink_output_completed_frames_flushed{0};
  40 atomic<int64_t> metric_decklink_output_completed_frames_late{0};
  41 atomic<int64_t> metric_decklink_output_completed_frames_unknown{0};
  42
  43 atomic<int64_t> metric_decklink_output_scheduled_samples{0};
  44
  45 }  // namespace
  46
  47 DeckLinkOutput::DeckLinkOutput(ResourcePool *resource_pool, QSurface *surface, unsigned width, unsigned height, unsigned card_index)
  48         : resource_pool(resource_pool), surface(surface), width(width), height(height), card_index(card_index)
  49 {
  50         chroma_subsampler.reset(new ChromaSubsampler(resource_pool));
  51
  52         if (!metrics_inited) {
  53                 latency_histogram.init("decklink_output");
  54                 global_metrics.add("decklink_output_width_pixels", &metric_decklink_output_width_pixels, Metrics::TYPE_GAUGE);
  55                 global_metrics.add("decklink_output_height_pixels", &metric_decklink_output_height_pixels, Metrics::TYPE_GAUGE);
  56                 global_metrics.add("decklink_output_frame_rate_den", &metric_decklink_output_frame_rate_den, Metrics::TYPE_GAUGE);
  57                 global_metrics.add("decklink_output_frame_rate_nom", &metric_decklink_output_frame_rate_nom, Metrics::TYPE_GAUGE);
  58                 global_metrics.add("decklink_output_inflight_frames", &metric_decklink_output_inflight_frames, Metrics::TYPE_GAUGE);
  59                 global_metrics.add("decklink_output_color_mismatch_frames", &metric_decklink_output_color_mismatch_frames);
  60
  61                 global_metrics.add("decklink_output_scheduled_frames", {{ "status", "dropped" }}, &metric_decklink_output_scheduled_frames_dropped);
  62                 global_metrics.add("decklink_output_scheduled_frames", {{ "status", "late" }}, &metric_decklink_output_scheduled_frames_late);
  63                 global_metrics.add("decklink_output_scheduled_frames", {{ "status", "normal" }}, &metric_decklink_output_scheduled_frames_normal);
  64                 global_metrics.add("decklink_output_scheduled_frames", {{ "status", "preroll" }}, &metric_decklink_output_scheduled_frames_preroll);
  65
  66                 global_metrics.add("decklink_output_completed_frames", {{ "status", "completed" }}, &metric_decklink_output_completed_frames_completed);
  67                 global_metrics.add("decklink_output_completed_frames", {{ "status", "dropped" }}, &metric_decklink_output_completed_frames_dropped);
  68                 global_metrics.add("decklink_output_completed_frames", {{ "status", "flushed" }}, &metric_decklink_output_completed_frames_flushed);
  69                 global_metrics.add("decklink_output_completed_frames", {{ "status", "late" }}, &metric_decklink_output_completed_frames_late);
  70                 global_metrics.add("decklink_output_completed_frames", {{ "status", "unknown" }}, &metric_decklink_output_completed_frames_unknown);
  71
  72                 global_metrics.add("decklink_output_scheduled_samples", &metric_decklink_output_scheduled_samples);
  73
  74                 metrics_inited = true;
  75         }
  76 }
  77
  78 void DeckLinkOutput::set_device(IDeckLink *decklink)
  79 {
  80         if (decklink->QueryInterface(IID_IDeckLinkOutput, (void**)&output) != S_OK) {
  81                 fprintf(stderr, "Card %u has no outputs\n", card_index);
  82                 exit(1);
  83         }
  84
  85         IDeckLinkDisplayModeIterator *mode_it;
  86         if (output->GetDisplayModeIterator(&mode_it) != S_OK) {
  87                 fprintf(stderr, "Failed to enumerate output display modes for card %u\n", card_index);
  88                 exit(1);
  89         }
  90
  91         video_modes.clear();
  92
  93         for (const auto &it : summarize_video_modes(mode_it, card_index)) {
  94                 if (it.second.width != width || it.second.height != height) {
  95                         continue;
  96                 }
  97
  98                 // We could support interlaced modes, but let's stay out of it for now,
  99                 // since we don't have interlaced stream output.
 100                 if (it.second.interlaced) {
 101                         continue;
 102                 }
 103
 104                 video_modes.insert(it);
 105         }
 106
 107         mode_it->Release();
 108
 109         // HDMI or SDI generally mean “both HDMI and SDI at the same time” on DeckLink cards
 110         // that support both; pick_default_video_connection() will generally pick one of those
 111         // if they exist. We're not very likely to need analog outputs, so we don't need a way
 112         // to change beyond that.
 113         video_connection = pick_default_video_connection(decklink, BMDDeckLinkVideoOutputConnections, card_index);
 114 }
 115
 116 void DeckLinkOutput::start_output(uint32_t mode, int64_t base_pts)
 117 {
 118         assert(output);
 119         assert(!playback_initiated);
 120
 121         if (video_modes.empty()) {
 122                 fprintf(stderr, "ERROR: No matching output modes for %dx%d found\n", width, height);
 123                 exit(1);
 124         }
 125
 126         should_quit.unquit();
 127         playback_initiated = true;
 128         playback_started = false;
 129         this->base_pts = base_pts;
 130
 131         IDeckLinkConfiguration *config = nullptr;
 132         if (output->QueryInterface(IID_IDeckLinkConfiguration, (void**)&config) != S_OK) {
 133                 fprintf(stderr, "Failed to get configuration interface for output card\n");
 134                 exit(1);
 135         }
 136         if (config->SetFlag(bmdDeckLinkConfigLowLatencyVideoOutput, true) != S_OK) {
 137                 fprintf(stderr, "Failed to set low latency output\n");
 138                 exit(1);
 139         }
 140         if (config->SetInt(bmdDeckLinkConfigVideoOutputConnection, video_connection) != S_OK) {
 141                 fprintf(stderr, "Failed to set video output connection for card %u\n", card_index);
 142                 exit(1);
 143         }
 144         if (config->SetFlag(bmdDeckLinkConfigUse1080pNotPsF, true) != S_OK) {
 145                 fprintf(stderr, "Failed to set PsF flag for card\n");
 146                 exit(1);
 147         }
 148         if (config->SetFlag(bmdDeckLinkConfigSMPTELevelAOutput, true) != S_OK) {
 149                 // This affects at least some no-name SDI->HDMI converters.
 150                 // Warn, but don't die.
 151                 fprintf(stderr, "WARNING: Failed to enable SMTPE Level A; resolutions like 1080p60 might have issues.\n");
 152         }
 153
 154         BMDDisplayModeSupport support;
 155         IDeckLinkDisplayMode *display_mode;
 156         BMDPixelFormat pixel_format = global_flags.ten_bit_output ? bmdFormat10BitYUV : bmdFormat8BitYUV;
 157         if (output->DoesSupportVideoMode(mode, pixel_format, bmdVideoOutputFlagDefault,
 158                                          &support, &display_mode) != S_OK) {
 159                 fprintf(stderr, "Couldn't ask for format support\n");
 160                 exit(1);
 161         }
 162
 163         if (support == bmdDisplayModeNotSupported) {
 164                 fprintf(stderr, "Requested display mode not supported\n");
 165                 exit(1);
 166         }
 167
 168         current_mode_flags = display_mode->GetFlags();
 169
 170         BMDTimeValue time_value;
 171         BMDTimeScale time_scale;
 172         if (display_mode->GetFrameRate(&time_value, &time_scale) != S_OK) {
 173                 fprintf(stderr, "Couldn't get frame rate\n");
 174                 exit(1);
 175         }
 176
 177         metric_decklink_output_width_pixels = width;
 178         metric_decklink_output_height_pixels = height;
 179         metric_decklink_output_frame_rate_nom = time_value;
 180         metric_decklink_output_frame_rate_den = time_scale;
 181
 182         frame_duration = time_value * TIMEBASE / time_scale;
 183
 184         display_mode->Release();
 185
 186         HRESULT result = output->EnableVideoOutput(mode, bmdVideoOutputFlagDefault);
 187         if (result != S_OK) {
 188                 fprintf(stderr, "Couldn't enable output with error 0x%x\n", result);
 189                 exit(1);
 190         }
 191         if (output->SetScheduledFrameCompletionCallback(this) != S_OK) {
 192                 fprintf(stderr, "Couldn't set callback\n");
 193                 exit(1);
 194         }
 195         assert(OUTPUT_FREQUENCY == 48000);
 196         if (output->EnableAudioOutput(bmdAudioSampleRate48kHz, bmdAudioSampleType32bitInteger, 2, bmdAudioOutputStreamTimestamped) != S_OK) {
 197                 fprintf(stderr, "Couldn't enable audio output\n");
 198                 exit(1);
 199         }
 200         if (output->BeginAudioPreroll() != S_OK) {
 201                 fprintf(stderr, "Couldn't begin audio preroll\n");
 202                 exit(1);
 203         }
 204
 205         present_thread = thread([this]{
 206                 QOpenGLContext *context = create_context(this->surface);
 207                 eglBindAPI(EGL_OPENGL_API);
 208                 if (!make_current(context, this->surface)) {
 209                         printf("display=%p surface=%p context=%p curr=%p err=%d\n", eglGetCurrentDisplay(), this->surface, context, eglGetCurrentContext(),
 210                                 eglGetError());
 211                         exit(1);
 212                 }
 213                 present_thread_func();
 214                 delete_context(context);
 215         });
 216 }
 217
 218 void DeckLinkOutput::end_output()
 219 {
 220         if (!playback_initiated) {
 221                 return;
 222         }
 223
 224         should_quit.quit();
 225         frame_queues_changed.notify_all();
 226         present_thread.join();
 227         playback_initiated = false;
 228
 229         output->StopScheduledPlayback(0, nullptr, 0);
 230         output->DisableVideoOutput();
 231         output->DisableAudioOutput();
 232
 233         // Wait until all frames are accounted for, and free them.
 234         {
 235                 unique_lock<mutex> lock(frame_queue_mutex);
 236                 while (!(frame_freelist.empty() && num_frames_in_flight == 0)) {
 237                         frame_queues_changed.wait(lock, [this]{ return !frame_freelist.empty(); });
 238                         frame_freelist.pop();
 239                 }
 240         }
 241 }
 242
 243 void DeckLinkOutput::send_frame(GLuint y_tex, GLuint cbcr_tex, YCbCrLumaCoefficients output_ycbcr_coefficients, const vector<RefCountedFrame> &input_frames, int64_t pts, int64_t duration)
 244 {
 245         assert(!should_quit.should_quit());
 246
 247         if ((current_mode_flags & bmdDisplayModeColorspaceRec601) && output_ycbcr_coefficients == YCBCR_REC_709) {
 248                 if (!last_frame_had_mode_mismatch) {
 249                         fprintf(stderr, "WARNING: Chosen output mode expects Rec. 601 Y'CbCr coefficients.\n");
 250                         fprintf(stderr, "         Consider --output-ycbcr-coefficients=rec601 (or =auto).\n");
 251                 }
 252                 last_frame_had_mode_mismatch = true;
 253                 ++metric_decklink_output_color_mismatch_frames;
 254         } else if ((current_mode_flags & bmdDisplayModeColorspaceRec709) && output_ycbcr_coefficients == YCBCR_REC_601) {
 255                 if (!last_frame_had_mode_mismatch) {
 256                         fprintf(stderr, "WARNING: Chosen output mode expects Rec. 709 Y'CbCr coefficients.\n");
 257                         fprintf(stderr, "         Consider --output-ycbcr-coefficients=rec709 (or =auto).\n");
 258                 }
 259                 last_frame_had_mode_mismatch = true;
 260                 ++metric_decklink_output_color_mismatch_frames;
 261         } else {
 262                 last_frame_had_mode_mismatch = false;
 263         }
 264
 265         unique_ptr<Frame> frame = move(get_frame());
 266         if (global_flags.ten_bit_output) {
 267                 chroma_subsampler->create_v210(y_tex, cbcr_tex, width, height, frame->uyvy_tex);
 268         } else {
 269                 chroma_subsampler->create_uyvy(y_tex, cbcr_tex, width, height, frame->uyvy_tex);
 270         }
 271
 272         // Download the UYVY texture to the PBO.
 273         glPixelStorei(GL_PACK_ROW_LENGTH, 0);
 274         check_error();
 275
 276         glBindBuffer(GL_PIXEL_PACK_BUFFER, frame->pbo);
 277         check_error();
 278
 279         if (global_flags.ten_bit_output) {
 280                 glBindTexture(GL_TEXTURE_2D, frame->uyvy_tex);
 281                 check_error();
 282                 glGetTexImage(GL_TEXTURE_2D, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, BUFFER_OFFSET(0));
 283                 check_error();
 284         } else {
 285                 glBindTexture(GL_TEXTURE_2D, frame->uyvy_tex);
 286                 check_error();
 287                 glGetTexImage(GL_TEXTURE_2D, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 288                 check_error();
 289         }
 290
 291         glBindTexture(GL_TEXTURE_2D, 0);
 292         check_error();
 293         glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
 294         check_error();
 295
 296         glMemoryBarrier(GL_TEXTURE_UPDATE_BARRIER_BIT | GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
 297         check_error();
 298
 299         frame->fence = RefCountedGLsync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
 300         check_error();
 301         glFlush();  // Make the DeckLink thread see the fence as soon as possible.
 302         check_error();
 303
 304         frame->input_frames = input_frames;
 305         frame->received_ts = find_received_timestamp(input_frames);
 306         frame->pts = pts;
 307         frame->duration = duration;
 308
 309         {
 310                 unique_lock<mutex> lock(frame_queue_mutex);
 311                 pending_video_frames.push(move(frame));
 312         }
 313         frame_queues_changed.notify_all();
 314 }
 315
 316 void DeckLinkOutput::send_audio(int64_t pts, const std::vector<float> &samples)
 317 {
 318         unique_ptr<int32_t[]> int_samples(new int32_t[samples.size()]);
 319         for (size_t i = 0; i < samples.size(); ++i) {
 320                 int_samples[i] = lrintf(samples[i] * 2147483648.0f);
 321         }
 322
 323         uint32_t frames_written;
 324         HRESULT result = output->ScheduleAudioSamples(int_samples.get(), samples.size() / 2,
 325                 pts, TIMEBASE, &frames_written);
 326         if (result != S_OK) {
 327                 fprintf(stderr, "ScheduleAudioSamples(pts=%ld) failed (result=0x%08x)\n", pts, result);
 328         } else {
 329                 if (frames_written != samples.size() / 2) {
 330                         fprintf(stderr, "ScheduleAudioSamples() returned short write (%u/%ld)\n", frames_written, samples.size() / 2);
 331                 }
 332         }
 333         metric_decklink_output_scheduled_samples += samples.size() / 2;
 334 }
 335
 336 void DeckLinkOutput::wait_for_frame(int64_t pts, int *dropped_frames, int64_t *frame_duration, bool *is_preroll, steady_clock::time_point *frame_timestamp)
 337 {
 338         assert(!should_quit.should_quit());
 339
 340         *dropped_frames = 0;
 341         *frame_duration = this->frame_duration;
 342
 343         const BMDTimeValue buffer = lrint(*frame_duration * global_flags.output_buffer_frames);
 344         const BMDTimeValue max_overshoot = lrint(*frame_duration * global_flags.output_slop_frames);
 345         BMDTimeValue target_time = pts - buffer;
 346
 347         // While prerolling, we send out frames as quickly as we can.
 348         if (target_time < base_pts) {
 349                 *is_preroll = true;
 350                 ++metric_decklink_output_scheduled_frames_preroll;
 351                 return;
 352         }
 353
 354         *is_preroll = !playback_started;
 355
 356         if (!playback_started) {
 357                 if (output->EndAudioPreroll() != S_OK) {
 358                         fprintf(stderr, "Could not end audio preroll\n");
 359                         exit(1);  // TODO
 360                 }
 361                 if (output->StartScheduledPlayback(base_pts, TIMEBASE, 1.0) != S_OK) {
 362                         fprintf(stderr, "Could not start playback\n");
 363                         exit(1);  // TODO
 364                 }
 365                 playback_started = true;
 366         }
 367
 368         BMDTimeValue stream_frame_time;
 369         double playback_speed;
 370         output->GetScheduledStreamTime(TIMEBASE, &stream_frame_time, &playback_speed);
 371
 372         *frame_timestamp = steady_clock::now() +
 373                 nanoseconds((target_time - stream_frame_time) * 1000000000 / TIMEBASE);
 374
 375         // If we're ahead of time, wait for the frame to (approximately) start.
 376         if (stream_frame_time < target_time) {
 377                 should_quit.sleep_until(*frame_timestamp);
 378                 ++metric_decklink_output_scheduled_frames_normal;
 379                 return;
 380         }
 381
 382         // If we overshot the previous frame by just a little,
 383         // fire off one immediately.
 384         if (stream_frame_time < target_time + max_overshoot) {
 385                 fprintf(stderr, "Warning: Frame was %ld ms late (but not skipping it due to --output-slop-frames).\n",
 386                         lrint((stream_frame_time - target_time) * 1000.0 / TIMEBASE));
 387                 ++metric_decklink_output_scheduled_frames_late;
 388                 return;
 389         }
 390
 391         // Oops, we missed by more than one frame. Return immediately,
 392         // but drop so that we catch up.
 393         *dropped_frames = (stream_frame_time - target_time + *frame_duration - 1) / *frame_duration;
 394         const int64_t ns_per_frame = this->frame_duration * 1000000000 / TIMEBASE;
 395         *frame_timestamp += nanoseconds(*dropped_frames * ns_per_frame);
 396         fprintf(stderr, "Dropped %d output frames; skipping.\n", *dropped_frames);
 397         metric_decklink_output_scheduled_frames_dropped += *dropped_frames;
 398         ++metric_decklink_output_scheduled_frames_normal;
 399 }
 400
 401 uint32_t DeckLinkOutput::pick_video_mode(uint32_t mode) const
 402 {
 403         if (video_modes.count(mode)) {
 404                 return mode;
 405         }
 406
 407         // Prioritize 59.94 > 60 > 29.97. If none of those are found, then pick the highest one.
 408         for (const pair<int, int> &desired : vector<pair<int, int>>{ { 60000, 1001 }, { 60, 0 }, { 30000, 1001 } }) {
 409                 for (const auto &it : video_modes) {
 410                         if (it.second.frame_rate_num * desired.second == desired.first * it.second.frame_rate_den) {
 411                                 return it.first;
 412                         }
 413                 }
 414         }
 415
 416         uint32_t best_mode = 0;
 417         double best_fps = 0.0;
 418         for (const auto &it : video_modes) {
 419                 double fps = double(it.second.frame_rate_num) / it.second.frame_rate_den;
 420                 if (fps > best_fps) {
 421                         best_mode = it.first;
 422                         best_fps = fps;
 423                 }
 424         }
 425         return best_mode;
 426 }
 427
 428 YCbCrLumaCoefficients DeckLinkOutput::preferred_ycbcr_coefficients() const
 429 {
 430         if (current_mode_flags & bmdDisplayModeColorspaceRec601) {
 431                 return YCBCR_REC_601;
 432         } else {
 433                 // Don't bother checking bmdDisplayModeColorspaceRec709;
 434                 // if none is set, 709 is a good default anyway.
 435                 return YCBCR_REC_709;
 436         }
 437 }
 438
 439 HRESULT DeckLinkOutput::ScheduledFrameCompleted(/* in */ IDeckLinkVideoFrame *completedFrame, /* in */ BMDOutputFrameCompletionResult result)
 440 {
 441         Frame *frame = static_cast<Frame *>(completedFrame);
 442         switch (result) {
 443         case bmdOutputFrameCompleted:
 444                 ++metric_decklink_output_completed_frames_completed;
 445                 break;
 446         case bmdOutputFrameDisplayedLate:
 447                 fprintf(stderr, "Output frame displayed late (pts=%ld)\n", frame->pts);
 448                 fprintf(stderr, "Consider increasing --output-buffer-frames if this persists.\n");
 449                 ++metric_decklink_output_completed_frames_late;
 450                 break;
 451         case bmdOutputFrameDropped:
 452                 fprintf(stderr, "Output frame was dropped (pts=%ld)\n", frame->pts);
 453                 fprintf(stderr, "Consider increasing --output-buffer-frames if this persists.\n");
 454                 ++metric_decklink_output_completed_frames_dropped;
 455                 break;
 456         case bmdOutputFrameFlushed:
 457                 fprintf(stderr, "Output frame was flushed (pts=%ld)\n", frame->pts);
 458                 ++metric_decklink_output_completed_frames_flushed;
 459                 break;
 460         default:
 461                 fprintf(stderr, "Output frame completed with unknown status %d\n", result);
 462                 ++metric_decklink_output_completed_frames_unknown;
 463                 break;
 464         }
 465
 466         static int frameno = 0;
 467         print_latency("DeckLink output latency (frame received → output on HDMI):", frame->received_ts, false, &frameno, &latency_histogram);
 468
 469         {
 470                 lock_guard<mutex> lock(frame_queue_mutex);
 471                 frame_freelist.push(unique_ptr<Frame>(frame));
 472                 --num_frames_in_flight;
 473                 --metric_decklink_output_inflight_frames;
 474         }
 475
 476         return S_OK;
 477 }
 478
 479 HRESULT DeckLinkOutput::ScheduledPlaybackHasStopped()
 480 {
 481         printf("playback stopped!\n");
 482         return S_OK;
 483 }
 484
 485 unique_ptr<DeckLinkOutput::Frame> DeckLinkOutput::get_frame()
 486 {
 487         lock_guard<mutex> lock(frame_queue_mutex);
 488
 489         if (!frame_freelist.empty()) {
 490                 unique_ptr<Frame> frame = move(frame_freelist.front());
 491                 frame_freelist.pop();
 492                 return frame;
 493         }
 494
 495         unique_ptr<Frame> frame(new Frame);
 496
 497         size_t stride;
 498         if (global_flags.ten_bit_output) {
 499                 stride = v210Converter::get_v210_stride(width);
 500                 GLint v210_width = stride / sizeof(uint32_t);
 501                 frame->uyvy_tex = resource_pool->create_2d_texture(GL_RGB10_A2, v210_width, height);
 502
 503                 // We need valid texture state, or NVIDIA won't allow us to write to the texture.
 504                 glBindTexture(GL_TEXTURE_2D, frame->uyvy_tex);
 505                 check_error();
 506                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 507                 check_error();
 508         } else {
 509                 stride = width * 2;
 510                 frame->uyvy_tex = resource_pool->create_2d_texture(GL_RGBA8, width / 2, height);
 511         }
 512
 513         glGenBuffers(1, &frame->pbo);
 514         check_error();
 515         glBindBuffer(GL_PIXEL_PACK_BUFFER, frame->pbo);
 516         check_error();
 517         glBufferStorage(GL_PIXEL_PACK_BUFFER, stride * height, NULL, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
 518         check_error();
 519         frame->uyvy_ptr = (uint8_t *)glMapBufferRange(GL_PIXEL_PACK_BUFFER, 0, stride * height, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
 520         check_error();
 521         frame->uyvy_ptr_local.reset(new uint8_t[stride * height]);
 522         frame->resource_pool = resource_pool;
 523
 524         return frame;
 525 }
 526
 527 void DeckLinkOutput::present_thread_func()
 528 {
 529         pthread_setname_np(pthread_self(), "DeckLinkOutput");
 530         for ( ;; ) {
 531                 unique_ptr<Frame> frame;
 532                 {
 533                         unique_lock<mutex> lock(frame_queue_mutex);
 534                         frame_queues_changed.wait(lock, [this]{
 535                                 return should_quit.should_quit() || !pending_video_frames.empty();
 536                         });
 537                         if (should_quit.should_quit()) {
 538                                 return;
 539                         }
 540                         frame = move(pending_video_frames.front());
 541                         pending_video_frames.pop();
 542                         ++num_frames_in_flight;
 543                         ++metric_decklink_output_inflight_frames;
 544                 }
 545
 546                 glClientWaitSync(frame->fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
 547                 check_error();
 548                 frame->fence.reset();
 549
 550                 if (global_flags.ten_bit_output) {
 551                         memcpy(frame->uyvy_ptr_local.get(), frame->uyvy_ptr, v210Converter::get_v210_stride(width) * height);
 552                 } else {
 553                         memcpy(frame->uyvy_ptr_local.get(), frame->uyvy_ptr, width * height * 2);
 554                 }
 555
 556                 // Release any input frames we needed to render this frame.
 557                 frame->input_frames.clear();
 558
 559                 BMDTimeValue pts = frame->pts;
 560                 BMDTimeValue duration = frame->duration;
 561                 HRESULT res = output->ScheduleVideoFrame(frame.get(), pts, duration, TIMEBASE);
 562                 if (res == S_OK) {
 563                         frame.release();  // Owned by the driver now.
 564                 } else {
 565                         fprintf(stderr, "Could not schedule video frame! (error=0x%08x)\n", res);
 566
 567                         lock_guard<mutex> lock(frame_queue_mutex);
 568                         frame_freelist.push(move(frame));
 569                         --num_frames_in_flight;
 570                         --metric_decklink_output_inflight_frames;
 571                 }
 572         }
 573 }
 574
 575 HRESULT STDMETHODCALLTYPE DeckLinkOutput::QueryInterface(REFIID, LPVOID *)
 576 {
 577         return E_NOINTERFACE;
 578 }
 579
 580 ULONG STDMETHODCALLTYPE DeckLinkOutput::AddRef()
 581 {
 582         return refcount.fetch_add(1) + 1;
 583 }
 584
 585 ULONG STDMETHODCALLTYPE DeckLinkOutput::Release()
 586 {
 587         int new_ref = refcount.fetch_sub(1) - 1;
 588         if (new_ref == 0)
 589                 delete this;
 590         return new_ref;
 591 }
 592
 593 DeckLinkOutput::Frame::~Frame()
 594 {
 595         glBindBuffer(GL_PIXEL_PACK_BUFFER, pbo);
 596         check_error();
 597         glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
 598         check_error();
 599         glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
 600         check_error();
 601         glDeleteBuffers(1, &pbo);
 602         check_error();
 603         resource_pool->release_2d_texture(uyvy_tex);
 604         check_error();
 605 }
 606
 607 HRESULT STDMETHODCALLTYPE DeckLinkOutput::Frame::QueryInterface(REFIID, LPVOID *)
 608 {
 609         return E_NOINTERFACE;
 610 }
 611
 612 ULONG STDMETHODCALLTYPE DeckLinkOutput::Frame::AddRef()
 613 {
 614         return refcount.fetch_add(1) + 1;
 615 }
 616
 617 ULONG STDMETHODCALLTYPE DeckLinkOutput::Frame::Release()
 618 {
 619         int new_ref = refcount.fetch_sub(1) - 1;
 620         if (new_ref == 0)
 621                 delete this;
 622         return new_ref;
 623 }
 624
 625 long DeckLinkOutput::Frame::GetWidth()
 626 {
 627         return global_flags.width;
 628 }
 629
 630 long DeckLinkOutput::Frame::GetHeight()
 631 {
 632         return global_flags.height;
 633 }
 634
 635 long DeckLinkOutput::Frame::GetRowBytes()
 636 {
 637         if (global_flags.ten_bit_output) {
 638                 return v210Converter::get_v210_stride(global_flags.width);
 639         } else {
 640                 return global_flags.width * 2;
 641         }
 642 }
 643
 644 BMDPixelFormat DeckLinkOutput::Frame::GetPixelFormat()
 645 {
 646         if (global_flags.ten_bit_output) {
 647                 return bmdFormat10BitYUV;
 648         } else {
 649                 return bmdFormat8BitYUV;
 650         }
 651 }
 652
 653 BMDFrameFlags DeckLinkOutput::Frame::GetFlags()
 654 {
 655         return bmdFrameFlagDefault;
 656 }
 657
 658 HRESULT DeckLinkOutput::Frame::GetBytes(/* out */ void **buffer)
 659 {
 660         *buffer = uyvy_ptr_local.get();
 661         return S_OK;
 662 }
 663
 664 HRESULT DeckLinkOutput::Frame::GetTimecode(/* in */ BMDTimecodeFormat format, /* out */ IDeckLinkTimecode **timecode)
 665 {
 666         fprintf(stderr, "STUB: GetTimecode()\n");
 667         return E_NOTIMPL;
 668 }
 669
 670 HRESULT DeckLinkOutput::Frame::GetAncillaryData(/* out */ IDeckLinkVideoFrameAncillary **ancillary)
 671 {
 672         fprintf(stderr, "STUB: GetAncillaryData()\n");
 673         return E_NOTIMPL;
 674 }