X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=mixer.cpp;h=f77f6d48f7eb0fa4da4bbeb189d40ff24d5a85b6;hb=134f9d70a4cd03dc1105d9d94b6003fedcef4760;hp=1be5660fb7f9219d17a1a39a15841f6d0c5c47b5;hpb=bae17501d52eeaf01f77e8c039f724352b02cb33;p=nageru diff --git a/mixer.cpp b/mixer.cpp index 1be5660..f77f6d4 100644 --- a/mixer.cpp +++ b/mixer.cpp @@ -10,6 +10,7 @@ #include #include #include +#include #include #include #include @@ -35,6 +36,7 @@ #include "chroma_subsampler.h" #include "context.h" #include "decklink_capture.h" +#include "decklink_output.h" #include "defs.h" #include "disk_space_estimator.h" #include "flags.h" @@ -108,6 +110,7 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards) num_cards(num_cards), mixer_surface(create_surface(format)), h264_encoder_surface(create_surface(format)), + decklink_output_surface(create_surface(format)), audio_mixer(num_cards) { CHECK(init_movit(MOVIT_SHADER_DIR, MOVIT_DEBUG_OFF)); @@ -156,7 +159,10 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards) break; } - configure_card(card_index, new DeckLinkCapture(decklink, card_index), /*is_fake_capture=*/false); + DeckLinkCapture *capture = new DeckLinkCapture(decklink, card_index); + DeckLinkOutput *output = new DeckLinkOutput(resource_pool.get(), decklink_output_surface, global_flags.width, global_flags.height, card_index); + output->set_device(decklink); + configure_card(card_index, capture, /*is_fake_capture=*/false, output); ++num_pci_devices; } decklink_iterator->Release(); @@ -165,18 +171,19 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards) fprintf(stderr, "DeckLink drivers not found. Probing for USB cards only.\n"); } } + unsigned num_usb_devices = BMUSBCapture::num_cards(); for (unsigned usb_card_index = 0; usb_card_index < num_usb_devices && card_index < num_cards; ++usb_card_index, ++card_index) { BMUSBCapture *capture = new BMUSBCapture(usb_card_index); capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, card_index)); - configure_card(card_index, capture, /*is_fake_capture=*/false); + configure_card(card_index, capture, /*is_fake_capture=*/false, /*output=*/nullptr); } fprintf(stderr, "Found %u USB card(s).\n", num_usb_devices); unsigned num_fake_cards = 0; for ( ; card_index < num_cards; ++card_index, ++num_fake_cards) { FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio); - configure_card(card_index, capture, /*is_fake_capture=*/true); + configure_card(card_index, capture, /*is_fake_capture=*/true, /*output=*/nullptr); } if (num_fake_cards > 0) { @@ -195,6 +202,10 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards) if (global_flags.enable_alsa_output) { alsa.reset(new ALSAOutput(OUTPUT_FREQUENCY, /*num_channels=*/2)); } + if (global_flags.output_card != -1) { + desired_output_card_index = global_flags.output_card; + set_output_card_internal(global_flags.output_card); + } } Mixer::~Mixer() @@ -203,27 +214,33 @@ Mixer::~Mixer() for (unsigned card_index = 0; card_index < num_cards; ++card_index) { { - unique_lock lock(bmusb_mutex); + unique_lock lock(card_mutex); cards[card_index].should_quit = true; // Unblock thread. cards[card_index].new_frames_changed.notify_all(); } cards[card_index].capture->stop_dequeue_thread(); + if (cards[card_index].output) { + cards[card_index].output->end_output(); + cards[card_index].output.reset(); + } } video_encoder.reset(nullptr); } -void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, bool is_fake_capture) +void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, bool is_fake_capture, DeckLinkOutput *output) { printf("Configuring card %d...\n", card_index); CaptureCard *card = &cards[card_index]; if (card->capture != nullptr) { card->capture->stop_dequeue_thread(); - delete card->capture; } - card->capture = capture; + card->capture.reset(capture); card->is_fake_capture = is_fake_capture; + if (card->output.get() != output) { + card->output.reset(output); + } card->capture->set_frame_callback(bind(&Mixer::bm_frame, this, card_index, _1, _2, _3, _4, _5, _6, _7)); if (card->frame_allocator == nullptr) { card->frame_allocator.reset(new PBOFrameAllocator(8 << 20, global_flags.width, global_flags.height)); // 8 MB. @@ -236,12 +253,54 @@ void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, bool card->last_timecode = -1; card->capture->configure_card(); + // NOTE: start_bm_capture() happens in thread_func(). + DeviceSpec device{InputSourceType::CAPTURE_CARD, card_index}; audio_mixer.reset_resampler(device); audio_mixer.set_display_name(device, card->capture->get_description()); audio_mixer.trigger_state_changed_callback(); } +void Mixer::set_output_card_internal(int card_index) +{ + // We don't really need to take card_mutex, since we're in the mixer + // thread and don't mess with any queues (which is the only thing that happens + // from other threads), but it's probably the safest in the long run. + unique_lock lock(card_mutex); + if (output_card_index != -1) { + // Switch the old card from output to input. + CaptureCard *old_card = &cards[output_card_index]; + old_card->output->end_output(); + + // Stop the fake card that we put into place. + // This needs to _not_ happen under the mutex, to avoid deadlock + // (delivering the last frame needs to take the mutex). + bmusb::CaptureInterface *fake_capture = old_card->capture.get(); + lock.unlock(); + fake_capture->stop_dequeue_thread(); + lock.lock(); + old_card->capture = move(old_card->parked_capture); + old_card->is_fake_capture = false; + old_card->capture->start_bm_capture(); + } + if (card_index != -1) { + CaptureCard *card = &cards[card_index]; + bmusb::CaptureInterface *capture = card->capture.get(); + // TODO: DeckLinkCapture::stop_dequeue_thread can actually take + // several seconds to complete (blocking on DisableVideoInput); + // see if we can maybe do it asynchronously. + lock.unlock(); + capture->stop_dequeue_thread(); + lock.lock(); + card->parked_capture = move(card->capture); + bmusb::CaptureInterface *fake_capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio); + configure_card(card_index, fake_capture, /*is_fake_capture=*/true, card->output.release()); + card->queue_length_policy.reset(card_index); + card->capture->start_bm_capture(); + card->output->start_output(bmdModeHD720p5994, pts_int); // FIXME + } + output_card_index = card_index; +} namespace { @@ -347,7 +406,7 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode, // Still send on the information that we _had_ a frame, even though it's corrupted, // so that pts can go up accordingly. { - unique_lock lock(bmusb_mutex); + unique_lock lock(card_mutex); CaptureCard::NewFrame new_frame; new_frame.frame = RefCountedFrame(FrameAllocator::Frame()); new_frame.length = frame_length; @@ -483,7 +542,7 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode, } { - unique_lock lock(bmusb_mutex); + unique_lock lock(card_mutex); CaptureCard::NewFrame new_frame; new_frame.frame = frame; new_frame.length = frame_length; @@ -511,6 +570,8 @@ void Mixer::bm_hotplug_remove(unsigned card_index) void Mixer::thread_func() { + pthread_setname_np(pthread_self(), "Mixer_OpenGL"); + eglBindAPI(EGL_OPENGL_API); QOpenGLContext *context = create_context(mixer_surface); if (!make_current(context, mixer_surface)) { @@ -521,7 +582,9 @@ void Mixer::thread_func() // Start the actual capture. (We don't want to do it before we're actually ready // to process output frames.) for (unsigned card_index = 0; card_index < num_cards; ++card_index) { - cards[card_index].capture->start_bm_capture(); + if (int(card_index) != output_card_index) { + cards[card_index].capture->start_bm_capture(); + } } steady_clock::time_point start, now; @@ -531,14 +594,26 @@ void Mixer::thread_func() int stats_dropped_frames = 0; while (!should_quit) { + if (desired_output_card_index != output_card_index) { + set_output_card_internal(desired_output_card_index); + } + CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS]; bool has_new_frame[MAX_VIDEO_CARDS] = { false }; - unsigned master_card_index = theme->map_signal(master_clock_channel); - assert(master_card_index < num_cards); + bool master_card_is_output; + unsigned master_card_index; + if (output_card_index != -1) { + master_card_is_output = true; + master_card_index = output_card_index; + } else { + master_card_is_output = false; + master_card_index = theme->map_signal(master_clock_channel); + assert(master_card_index < num_cards); + } - OutputFrameInfo output_frame_info = get_one_frame_from_each_card(master_card_index, new_frames, has_new_frame); - schedule_audio_resampling_tasks(output_frame_info.dropped_frames, output_frame_info.num_samples, output_frame_info.frame_duration); + OutputFrameInfo output_frame_info = get_one_frame_from_each_card(master_card_index, master_card_is_output, new_frames, has_new_frame); + schedule_audio_resampling_tasks(output_frame_info.dropped_frames, output_frame_info.num_samples, output_frame_info.frame_duration, output_frame_info.is_preroll); stats_dropped_frames += output_frame_info.dropped_frames; handle_hotplugged_cards(); @@ -558,7 +633,7 @@ void Mixer::thread_func() // If the first card is reporting a corrupted or otherwise dropped frame, // just increase the pts (skipping over this frame) and don't try to compute anything new. - if (new_frames[master_card_index].frame->len == 0) { + if (!master_card_is_output && new_frames[master_card_index].frame->len == 0) { ++stats_dropped_frames; pts_int += new_frames[master_card_index].length; continue; @@ -646,17 +721,36 @@ void Mixer::thread_func() resource_pool->clean_context(); } -Mixer::OutputFrameInfo Mixer::get_one_frame_from_each_card(unsigned master_card_index, CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS], bool has_new_frame[MAX_VIDEO_CARDS]) +bool Mixer::input_card_is_master_clock(unsigned card_index, unsigned master_card_index) const { - OutputFrameInfo output_frame_info; + if (output_card_index != -1) { + // The output card (ie., cards[output_card_index].output) is the master clock, + // so no input card (ie., cards[card_index].capture) is. + return false; + } + return (card_index == master_card_index); +} +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]) +{ + OutputFrameInfo output_frame_info; start: - // The first card is the master timer, so wait for it to have a new frame. - // TODO: Add a timeout. - unique_lock lock(bmusb_mutex); - 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(); }); + unique_lock lock(card_mutex, defer_lock); + if (master_card_is_output) { + // Clocked to the output, so wait for it to be ready for the next frame. + 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); + lock.lock(); + } else { + // Wait for the master card to have a new frame. + // TODO: Add a timeout. + output_frame_info.is_preroll = false; + lock.lock(); + 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(); }); + } - if (cards[master_card_index].new_frames.empty()) { + if (master_card_is_output) { + handle_hotplugged_cards(); + } else if (cards[master_card_index].new_frames.empty()) { // We were woken up, but not due to a new frame. Deal with it // and then restart. assert(cards[master_card_index].capture->get_disconnected()); @@ -667,7 +761,7 @@ start: for (unsigned card_index = 0; card_index < num_cards; ++card_index) { CaptureCard *card = &cards[card_index]; if (card->new_frames.empty()) { - assert(card_index != master_card_index); + assert(!input_card_is_master_clock(card_index, master_card_index)); card->queue_length_policy.update_policy(-1); continue; } @@ -676,7 +770,7 @@ start: card->new_frames.pop(); card->new_frames_changed.notify_all(); - if (card_index == master_card_index) { + if (input_card_is_master_clock(card_index, master_card_index)) { // We don't use the queue length policy for the master card, // but we will if it stops being the master. Thus, clear out // the policy in case we switch in the future. @@ -691,8 +785,10 @@ start: } } - output_frame_info.dropped_frames = new_frames[master_card_index].dropped_frames; - output_frame_info.frame_duration = new_frames[master_card_index].length; + if (!master_card_is_output) { + output_frame_info.dropped_frames = new_frames[master_card_index].dropped_frames; + output_frame_info.frame_duration = new_frames[master_card_index].length; + } // This might get off by a fractional sample when changing master card // between ones with different frame rates, but that's fine. @@ -712,7 +808,7 @@ void Mixer::handle_hotplugged_cards() if (card->capture->get_disconnected()) { fprintf(stderr, "Card %u went away, replacing with a fake card.\n", card_index); FakeCapture *capture = new FakeCapture(global_flags.width, global_flags.height, FAKE_FPS, OUTPUT_FREQUENCY, card_index, global_flags.fake_cards_audio); - configure_card(card_index, capture, /*is_fake_capture=*/true); + configure_card(card_index, capture, /*is_fake_capture=*/true, /*output=*/nullptr); card->queue_length_policy.reset(card_index); card->capture->start_bm_capture(); } @@ -729,7 +825,7 @@ void Mixer::handle_hotplugged_cards() int free_card_index = -1; for (unsigned card_index = 0; card_index < num_cards; ++card_index) { if (cards[card_index].is_fake_capture) { - free_card_index = int(card_index); + free_card_index = card_index; break; } } @@ -742,7 +838,7 @@ void Mixer::handle_hotplugged_cards() fprintf(stderr, "New card plugged in, choosing slot %d.\n", free_card_index); CaptureCard *card = &cards[free_card_index]; BMUSBCapture *capture = new BMUSBCapture(free_card_index, new_dev); - configure_card(free_card_index, capture, /*is_fake_capture=*/false); + configure_card(free_card_index, capture, /*is_fake_capture=*/false, /*output=*/nullptr); card->queue_length_policy.reset(free_card_index); capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, free_card_index)); capture->start_bm_capture(); @@ -751,7 +847,7 @@ void Mixer::handle_hotplugged_cards() } -void Mixer::schedule_audio_resampling_tasks(unsigned dropped_frames, int num_samples_per_frame, int length_per_frame) +void Mixer::schedule_audio_resampling_tasks(unsigned dropped_frames, int num_samples_per_frame, int length_per_frame, bool is_preroll) { // Resample the audio as needed, including from previously dropped frames. assert(num_cards > 0); @@ -772,7 +868,7 @@ void Mixer::schedule_audio_resampling_tasks(unsigned dropped_frames, int num_sam // since dropped frames are expected to be rare, and it might be // better to just wait until we have a slightly more normal situation). unique_lock lock(audio_mutex); - bool adjust_rate = !dropped_frame; + bool adjust_rate = !dropped_frame && !is_preroll; audio_task_queue.push(AudioTask{pts_int, num_samples_per_frame, adjust_rate}); audio_task_queue_changed.notify_one(); } @@ -806,6 +902,9 @@ void Mixer::render_one_frame(int64_t duration) resource_pool->release_fbo(fbo); chroma_subsampler->subsample_chroma(cbcr_full_tex, global_flags.width, global_flags.height, cbcr_tex); + if (output_card_index != -1) { + cards[output_card_index].output->send_frame(y_tex, cbcr_full_tex, theme_main_chain.input_frames, pts_int, duration); + } resource_pool->release_2d_texture(cbcr_full_tex); // Set the right state for rgba_tex. @@ -845,6 +944,8 @@ void Mixer::render_one_frame(int64_t duration) void Mixer::audio_thread_func() { + pthread_setname_np(pthread_self(), "Mixer_Audio"); + while (!should_quit) { AudioTask task; @@ -869,7 +970,10 @@ void Mixer::audio_thread_func() if (alsa) { alsa->write(samples_out); } - decklink_output->send_audio(task.pts_int, samples_out); + if (output_card_index != -1) { + const int64_t av_delay = lrint(global_flags.audio_queue_length_ms * 0.001 * TIMEBASE); // Corresponds to the delay in ResamplingQueue. + cards[output_card_index].output->send_audio(task.pts_int + av_delay, samples_out); + } video_encoder->add_audio(task.pts_int, move(samples_out)); } }