]> git.sesse.net Git - nageru/blobdiff - mixer.cpp
Update the queue length metric after trimming, not before.
[nageru] / mixer.cpp
index b00c4af0ef1a52d03ee2e6cdb453384209acb85a..6846d83ffdbaef73420d638cc1b282ce11cb02a3 100644 (file)
--- a/mixer.cpp
+++ b/mixer.cpp
 #include "decklink_output.h"
 #include "defs.h"
 #include "disk_space_estimator.h"
+#include "ffmpeg_capture.h"
 #include "flags.h"
 #include "input_mapping.h"
+#include "metrics.h"
 #include "pbo_frame_allocator.h"
 #include "ref_counted_gl_sync.h"
 #include "resampling_queue.h"
@@ -78,29 +80,42 @@ void insert_new_frame(RefCountedFrame frame, unsigned field_num, bool interlaced
        }
 }
 
-void ensure_texture_resolution(PBOFrameAllocator::Userdata *userdata, unsigned field, unsigned width, unsigned height, unsigned v210_width)
+void ensure_texture_resolution(PBOFrameAllocator::Userdata *userdata, unsigned field, unsigned width, unsigned height, unsigned cbcr_width, unsigned cbcr_height, unsigned v210_width)
 {
        bool first;
-       if (userdata->pixel_format == bmusb::PixelFormat_10BitYCbCr) {
+       switch (userdata->pixel_format) {
+       case PixelFormat_10BitYCbCr:
                first = userdata->tex_v210[field] == 0 || userdata->tex_444[field] == 0;
-       } else {
+               break;
+       case PixelFormat_8BitYCbCr:
                first = userdata->tex_y[field] == 0 || userdata->tex_cbcr[field] == 0;
+               break;
+       case PixelFormat_8BitBGRA:
+               first = userdata->tex_rgba[field] == 0;
+               break;
+       case PixelFormat_8BitYCbCrPlanar:
+               first = userdata->tex_y[field] == 0 || userdata->tex_cb[field] == 0 || userdata->tex_cr[field] == 0;
+               break;
+       default:
+               assert(false);
        }
 
        if (first ||
            width != userdata->last_width[field] ||
-           height != userdata->last_height[field]) {
+           height != userdata->last_height[field] ||
+           cbcr_width != userdata->last_cbcr_width[field] ||
+           cbcr_height != userdata->last_cbcr_height[field]) {
                // We changed resolution since last use of this texture, so we need to create
                // a new object. Note that this each card has its own PBOFrameAllocator,
                // we don't need to worry about these flip-flopping between resolutions.
-               if (userdata->pixel_format == bmusb::PixelFormat_10BitYCbCr) {
+               switch (userdata->pixel_format) {
+               case PixelFormat_10BitYCbCr:
                        glBindTexture(GL_TEXTURE_2D, userdata->tex_444[field]);
                        check_error();
                        glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, nullptr);
                        check_error();
-               } else {
-                       size_t cbcr_width = width / 2;
-
+                       break;
+               case PixelFormat_8BitYCbCr: {
                        glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
                        check_error();
                        glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, cbcr_width, height, 0, GL_RG, GL_UNSIGNED_BYTE, nullptr);
@@ -109,9 +124,38 @@ void ensure_texture_resolution(PBOFrameAllocator::Userdata *userdata, unsigned f
                        check_error();
                        glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
                        check_error();
+                       break;
+               }
+               case PixelFormat_8BitYCbCrPlanar: {
+                       glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
+                       check_error();
+                       glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, width, height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
+                       check_error();
+                       glBindTexture(GL_TEXTURE_2D, userdata->tex_cb[field]);
+                       check_error();
+                       glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, cbcr_width, cbcr_height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
+                       check_error();
+                       glBindTexture(GL_TEXTURE_2D, userdata->tex_cr[field]);
+                       check_error();
+                       glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, cbcr_width, cbcr_height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
+                       check_error();
+                       break;
+               }
+               case PixelFormat_8BitBGRA:
+                       glBindTexture(GL_TEXTURE_2D, userdata->tex_rgba[field]);
+                       check_error();
+                       if (global_flags.can_disable_srgb_decoder) {  // See the comments in tweaked_inputs.h.
+                               glTexImage2D(GL_TEXTURE_2D, 0, GL_SRGB8_ALPHA8, width, height, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, nullptr);
+                       } else {
+                               glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, nullptr);
+                       }
+                       check_error();
+                       break;
                }
                userdata->last_width[field] = width;
                userdata->last_height[field] = height;
+               userdata->last_cbcr_width[field] = cbcr_width;
+               userdata->last_cbcr_height[field] = cbcr_height;
        }
        if (global_flags.ten_bit_input &&
            (first || v210_width != userdata->last_v210_width[field])) {
@@ -154,6 +198,13 @@ void upload_texture(GLuint tex, GLuint width, GLuint height, GLuint stride, bool
 
 }  // namespace
 
+void QueueLengthPolicy::register_metrics(const vector<pair<string, string>> &labels)
+{
+       global_metrics.add("input_queue_length_frames", labels, &metric_input_queue_length_frames, Metrics::TYPE_GAUGE);
+       global_metrics.add("input_queue_safe_length_frames", labels, &metric_input_queue_safe_length_frames, Metrics::TYPE_GAUGE);
+       global_metrics.add("input_queue_duped_frames", labels, &metric_input_duped_frames);
+}
+
 void QueueLengthPolicy::update_policy(unsigned queue_length)
 {
        if (queue_length == 0) {  // Starvation.
@@ -164,6 +215,8 @@ void QueueLengthPolicy::update_policy(unsigned queue_length)
                }
                frames_with_at_least_one = 0;
                been_at_safe_point_since_last_starvation = false;
+               ++metric_input_duped_frames;
+               metric_input_queue_safe_length_frames = safe_queue_length;
                return;
        }
        if (queue_length >= safe_queue_length) {
@@ -171,6 +224,7 @@ void QueueLengthPolicy::update_policy(unsigned queue_length)
        }
        if (++frames_with_at_least_one >= 1000 && safe_queue_length > 1) {
                --safe_queue_length;
+               metric_input_queue_safe_length_frames = safe_queue_length;
                fprintf(stderr, "Card %u: Spare frames for more than 1000 frames, reducing safe limit to %u frame(s)\n",
                        card_index, safe_queue_length);
                frames_with_at_least_one = 0;
@@ -183,11 +237,17 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards)
          mixer_surface(create_surface(format)),
          h264_encoder_surface(create_surface(format)),
          decklink_output_surface(create_surface(format)),
+         ycbcr_interpretation(global_flags.ycbcr_interpretation),
          audio_mixer(num_cards)
 {
        CHECK(init_movit(MOVIT_SHADER_DIR, MOVIT_DEBUG_OFF));
        check_error();
 
+       // This nearly always should be true.
+       global_flags.can_disable_srgb_decoder =
+               epoxy_has_gl_extension("GL_EXT_texture_sRGB_decode") &&
+               epoxy_has_gl_extension("GL_ARB_sampler_objects");
+
        // Since we allow non-bouncing 4:2:2 YCbCrInputs, effective subpixel precision
        // will be halved when sampling them, and we need to compensate here.
        movit_texel_subpixel_precision /= 2.0;
@@ -253,7 +313,7 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards)
                                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);
+                               configure_card(card_index, capture, CardType::LIVE_CARD, output);
                                ++num_pci_devices;
                        }
                        decklink_iterator->Release();
@@ -267,24 +327,37 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned 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, /*output=*/nullptr);
+               configure_card(card_index, capture, CardType::LIVE_CARD, /*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, /*output=*/nullptr);
+               configure_card(card_index, capture, CardType::FAKE_CAPTURE, /*output=*/nullptr);
        }
 
        if (num_fake_cards > 0) {
                fprintf(stderr, "Initialized %u fake cards.\n", num_fake_cards);
        }
 
+       // Initialize all video inputs the theme asked for. Note that these are
+       // all put _after_ the regular cards, which stop at <num_cards> - 1.
+       std::vector<FFmpegCapture *> video_inputs = theme->get_video_inputs();
+       for (unsigned video_card_index = 0; video_card_index < video_inputs.size(); ++card_index, ++video_card_index) {
+               if (card_index >= MAX_VIDEO_CARDS) {
+                       fprintf(stderr, "ERROR: Not enough card slots available for the videos the theme requested.\n");
+                       exit(1);
+               }
+               configure_card(card_index, video_inputs[video_card_index], CardType::FFMPEG_INPUT, /*output=*/nullptr);
+               video_inputs[video_card_index]->set_card_index(card_index);
+       }
+       num_video_inputs = video_inputs.size();
+
        BMUSBCapture::set_card_connected_callback(bind(&Mixer::bm_hotplug_add, this, _1));
        BMUSBCapture::start_bm_thread();
 
-       for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+       for (unsigned card_index = 0; card_index < num_cards + num_video_inputs; ++card_index) {
                cards[card_index].queue_length_policy.reset(card_index);
        }
 
@@ -326,13 +399,21 @@ Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards)
                desired_output_card_index = global_flags.output_card;
                set_output_card_internal(global_flags.output_card);
        }
+
+       metric_start_time_seconds = get_timestamp_for_metrics();
+
+       global_metrics.add("frames_output_total", &metric_frames_output_total);
+       global_metrics.add("frames_output_dropped", &metric_frames_output_dropped);
+       global_metrics.add("start_time_seconds", &metric_start_time_seconds, Metrics::TYPE_GAUGE);
+       global_metrics.add("memory_used_bytes", &metrics_memory_used_bytes);
+       global_metrics.add("metrics_memory_locked_limit_bytes", &metrics_memory_locked_limit_bytes);
 }
 
 Mixer::~Mixer()
 {
        BMUSBCapture::stop_bm_thread();
 
-       for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+       for (unsigned card_index = 0; card_index < num_cards + num_video_inputs; ++card_index) {
                {
                        unique_lock<mutex> lock(card_mutex);
                        cards[card_index].should_quit = true;  // Unblock thread.
@@ -348,7 +429,7 @@ Mixer::~Mixer()
        video_encoder.reset(nullptr);
 }
 
-void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, bool is_fake_capture, DeckLinkOutput *output)
+void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, CardType card_type, DeckLinkOutput *output)
 {
        printf("Configuring card %d...\n", card_index);
 
@@ -357,12 +438,20 @@ void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, bool
                card->capture->stop_dequeue_thread();
        }
        card->capture.reset(capture);
-       card->is_fake_capture = is_fake_capture;
+       card->is_fake_capture = (card_type == CardType::FAKE_CAPTURE);
+       card->type = card_type;
        if (card->output.get() != output) {
                card->output.reset(output);
        }
 
-       bmusb::PixelFormat pixel_format = global_flags.ten_bit_input ? PixelFormat_10BitYCbCr : PixelFormat_8BitYCbCr;
+       PixelFormat pixel_format;
+       if (card_type == CardType::FFMPEG_INPUT) {
+               pixel_format = capture->get_current_pixel_format();
+       } else if (global_flags.ten_bit_input) {
+               pixel_format = PixelFormat_10BitYCbCr;
+       } else {
+               pixel_format = PixelFormat_8BitYCbCr;
+       }
 
        card->capture->set_frame_callback(bind(&Mixer::bm_frame, this, card_index, _1, _2, _3, _4, _5, _6, _7));
        if (card->frame_allocator == nullptr) {
@@ -383,6 +472,39 @@ void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, bool
        audio_mixer.reset_resampler(device);
        audio_mixer.set_display_name(device, card->capture->get_description());
        audio_mixer.trigger_state_changed_callback();
+
+       // Register metrics.
+       vector<pair<string, string>> labels;
+       char card_name[64];
+       snprintf(card_name, sizeof(card_name), "%d", card_index);
+       labels.emplace_back("card", card_name);
+
+       switch (card_type) {
+       case CardType::LIVE_CARD:
+               labels.emplace_back("cardtype", "live");
+               break;
+       case CardType::FAKE_CAPTURE:
+               labels.emplace_back("cardtype", "fake");
+               break;
+       case CardType::FFMPEG_INPUT:
+               labels.emplace_back("cardtype", "ffmpeg");
+               break;
+       default:
+               assert(false);
+       }
+       card->queue_length_policy.register_metrics(labels);
+       global_metrics.add("input_dropped_frames_jitter", labels, &card->metric_input_dropped_frames_jitter);
+       global_metrics.add("input_dropped_frames_error", labels, &card->metric_input_dropped_frames_error);
+       global_metrics.add("input_dropped_frames_resets", labels, &card->metric_input_resets);
+
+       global_metrics.add("input_has_signal_bool", labels, &card->metric_input_has_signal_bool, Metrics::TYPE_GAUGE);
+       global_metrics.add("input_is_connected_bool", labels, &card->metric_input_is_connected_bool, Metrics::TYPE_GAUGE);
+       global_metrics.add("input_interlaced_bool", labels, &card->metric_input_interlaced_bool, Metrics::TYPE_GAUGE);
+       global_metrics.add("input_width_pixels", labels, &card->metric_input_width_pixels, Metrics::TYPE_GAUGE);
+       global_metrics.add("input_height_pixels", labels, &card->metric_input_height_pixels, Metrics::TYPE_GAUGE);
+       global_metrics.add("input_frame_rate_nom", labels, &card->metric_input_frame_rate_nom, Metrics::TYPE_GAUGE);
+       global_metrics.add("input_frame_rate_den", labels, &card->metric_input_frame_rate_den, Metrics::TYPE_GAUGE);
+       global_metrics.add("input_sample_rate_hz", labels, &card->metric_input_sample_rate_hz, Metrics::TYPE_GAUGE);
 }
 
 void Mixer::set_output_card_internal(int card_index)
@@ -399,7 +521,7 @@ void Mixer::set_output_card_internal(int card_index)
                // 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();
+               CaptureInterface *fake_capture = old_card->capture.get();
                lock.unlock();
                fake_capture->stop_dequeue_thread();
                lock.lock();
@@ -409,7 +531,7 @@ void Mixer::set_output_card_internal(int card_index)
        }
        if (card_index != -1) {
                CaptureCard *card = &cards[card_index];
-               bmusb::CaptureInterface *capture = card->capture.get();
+               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.
@@ -417,8 +539,8 @@ void Mixer::set_output_card_internal(int card_index)
                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());
+               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, CardType::FAKE_CAPTURE, card->output.release());
                card->queue_length_policy.reset(card_index);
                card->capture->start_bm_capture();
                desired_output_video_mode = output_video_mode = card->output->pick_video_mode(desired_output_video_mode);
@@ -448,6 +570,15 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
        DeviceSpec device{InputSourceType::CAPTURE_CARD, card_index};
        CaptureCard *card = &cards[card_index];
 
+       card->metric_input_has_signal_bool = video_format.has_signal;
+       card->metric_input_is_connected_bool = video_format.is_connected;
+       card->metric_input_interlaced_bool = video_format.interlaced;
+       card->metric_input_width_pixels = video_format.width;
+       card->metric_input_height_pixels = video_format.height;
+       card->metric_input_frame_rate_nom = video_format.frame_rate_nom;
+       card->metric_input_frame_rate_den = video_format.frame_rate_den;
+       card->metric_input_sample_rate_hz = audio_format.sample_rate;
+
        if (is_mode_scanning[card_index]) {
                if (video_format.has_signal) {
                        // Found a stable signal, so stop scanning.
@@ -497,10 +628,12 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
                        card_index, card->last_timecode, timecode);
                audio_mixer.reset_resampler(device);
                dropped_frames = 0;
+               ++card->metric_input_resets;
        } else if (dropped_frames > 0) {
                // Insert silence as needed.
                fprintf(stderr, "Card %d dropped %d frame(s) (before timecode 0x%04x), inserting silence.\n",
                        card_index, dropped_frames, timecode);
+               card->metric_input_dropped_frames_error += dropped_frames;
 
                bool success;
                do {
@@ -517,7 +650,28 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
 
        card->last_timecode = timecode;
 
+       PBOFrameAllocator::Userdata *userdata = (PBOFrameAllocator::Userdata *)video_frame.userdata;
+
+       size_t cbcr_width, cbcr_height, cbcr_offset, y_offset;
        size_t expected_length = video_format.stride * (video_format.height + video_format.extra_lines_top + video_format.extra_lines_bottom);
+       if (userdata != nullptr && userdata->pixel_format == PixelFormat_8BitYCbCrPlanar) {
+               // The calculation above is wrong for planar Y'CbCr, so just override it.
+               assert(card->type == CardType::FFMPEG_INPUT);
+               assert(video_offset == 0);
+               expected_length = video_frame.len;
+
+               userdata->ycbcr_format = (static_cast<FFmpegCapture *>(card->capture.get()))->get_current_frame_ycbcr_format();
+               cbcr_width = video_format.width / userdata->ycbcr_format.chroma_subsampling_x;
+               cbcr_height = video_format.height / userdata->ycbcr_format.chroma_subsampling_y;
+               cbcr_offset = video_format.width * video_format.height;
+               y_offset = 0;
+       } else {
+               // All the other Y'CbCr formats are 4:2:2.
+               cbcr_width = video_format.width / 2;
+               cbcr_height = video_format.height;
+               cbcr_offset = video_offset / 2;
+               y_offset = video_frame.size / 2 + video_offset / 2;
+       }
        if (video_frame.len - video_offset == 0 ||
            video_frame.len - video_offset != expected_length) {
                if (video_frame.len != 0) {
@@ -544,8 +698,6 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
                return;
        }
 
-       PBOFrameAllocator::Userdata *userdata = (PBOFrameAllocator::Userdata *)video_frame.userdata;
-
        unsigned num_fields = video_format.interlaced ? 2 : 1;
        steady_clock::time_point frame_upload_start;
        bool interlaced_stride = false;
@@ -554,6 +706,7 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
                // a deinterlacer to actually get this right.
                assert(video_format.height % 2 == 0);
                video_format.height /= 2;
+               cbcr_height /= 2;
                assert(frame_length % 2 == 0);
                frame_length /= 2;
                num_fields = 2;
@@ -570,10 +723,6 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
        RefCountedFrame frame(video_frame);
 
        // Upload the textures.
-       const size_t cbcr_width = video_format.width / 2;
-       const size_t cbcr_offset = video_offset / 2;
-       const size_t y_offset = video_frame.size / 2 + video_offset / 2;
-
        for (unsigned field = 0; field < num_fields; ++field) {
                // Put the actual texture upload in a lambda that is executed in the main thread.
                // It is entirely possible to do this in the same thread (and it might even be
@@ -583,7 +732,7 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
                // Note that this means we must hold on to the actual frame data in <userdata>
                // until the upload command is run, but we hold on to <frame> much longer than that
                // (in fact, all the way until we no longer use the texture in rendering).
-               auto upload_func = [this, field, video_format, y_offset, video_offset, cbcr_offset, cbcr_width, interlaced_stride, userdata]() {
+               auto upload_func = [this, field, video_format, y_offset, video_offset, cbcr_offset, cbcr_width, cbcr_height, interlaced_stride, userdata]() {
                        unsigned field_start_line;
                        if (field == 1) {
                                field_start_line = video_format.second_field_start;
@@ -591,24 +740,55 @@ void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
                                field_start_line = video_format.extra_lines_top;
                        }
 
-                       // For 8-bit input, v210_width will be nonsensical but not used.
+                       // For anything not FRAME_FORMAT_YCBCR_10BIT, v210_width will be nonsensical but not used.
                        size_t v210_width = video_format.stride / sizeof(uint32_t);
-                       ensure_texture_resolution(userdata, field, video_format.width, video_format.height, v210_width);
+                       ensure_texture_resolution(userdata, field, video_format.width, video_format.height, cbcr_width, cbcr_height, v210_width);
 
                        glBindBuffer(GL_PIXEL_UNPACK_BUFFER, userdata->pbo);
                        check_error();
 
-                       if (userdata->pixel_format == bmusb::PixelFormat_10BitYCbCr) {
+                       switch (userdata->pixel_format) {
+                       case PixelFormat_10BitYCbCr: {
                                size_t field_start = video_offset + video_format.stride * field_start_line;
                                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);
                                v210_converter->convert(userdata->tex_v210[field], userdata->tex_444[field], video_format.width, video_format.height);
-                       } else {
+                               break;
+                       }
+                       case PixelFormat_8BitYCbCr: {
                                size_t field_y_start = y_offset + video_format.width * field_start_line;
                                size_t field_cbcr_start = cbcr_offset + cbcr_width * field_start_line * sizeof(uint16_t);
 
                                // Make up our own strides, since we are interleaving.
                                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);
-                               upload_texture(userdata->tex_cbcr[field], cbcr_width, video_format.height, cbcr_width * sizeof(uint16_t), interlaced_stride, GL_RG, GL_UNSIGNED_BYTE, field_cbcr_start);
+                               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);
+                               break;
+                       }
+                       case PixelFormat_8BitYCbCrPlanar: {
+                               assert(field_start_line == 0);  // We don't really support interlaced here.
+                               size_t field_y_start = y_offset;
+                               size_t field_cb_start = cbcr_offset;
+                               size_t field_cr_start = cbcr_offset + cbcr_width * cbcr_height;
+
+                               // Make up our own strides, since we are interleaving.
+                               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);
+                               upload_texture(userdata->tex_cb[field], cbcr_width, cbcr_height, cbcr_width, interlaced_stride, GL_RED, GL_UNSIGNED_BYTE, field_cb_start);
+                               upload_texture(userdata->tex_cr[field], cbcr_width, cbcr_height, cbcr_width, interlaced_stride, GL_RED, GL_UNSIGNED_BYTE, field_cr_start);
+                               break;
+                       }
+                       case PixelFormat_8BitBGRA: {
+                               size_t field_start = video_offset + video_format.stride * field_start_line;
+                               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);
+                               // These could be asked to deliver mipmaps at any time.
+                               glBindTexture(GL_TEXTURE_2D, userdata->tex_rgba[field]);
+                               check_error();
+                               glGenerateMipmap(GL_TEXTURE_2D);
+                               check_error();
+                               glBindTexture(GL_TEXTURE_2D, 0);
+                               check_error();
+                               break;
+                       }
+                       default:
+                               assert(false);
                        }
 
                        glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
@@ -667,7 +847,7 @@ 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) {
+       for (unsigned card_index = 0; card_index < num_cards + num_video_inputs; ++card_index) {
                if (int(card_index) != output_card_index) {
                        cards[card_index].capture->start_bm_capture();
                }
@@ -710,7 +890,7 @@ void Mixer::thread_func()
 
                handle_hotplugged_cards();
 
-               for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+               for (unsigned card_index = 0; card_index < num_cards + num_video_inputs; ++card_index) {
                        if (card_index == master_card_index || !has_new_frame[card_index]) {
                                continue;
                        }
@@ -731,7 +911,7 @@ void Mixer::thread_func()
                        continue;
                }
 
-               for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+               for (unsigned card_index = 0; card_index < num_cards + num_video_inputs; ++card_index) {
                        if (!has_new_frame[card_index] || new_frames[card_index].frame->len == 0)
                                continue;
 
@@ -754,6 +934,10 @@ void Mixer::thread_func()
 
                now = steady_clock::now();
                double elapsed = duration<double>(now - start).count();
+
+               metric_frames_output_total = frame_num;
+               metric_frames_output_dropped = stats_dropped_frames;
+
                if (frame_num % 100 == 0) {
                        printf("%d frames (%d dropped) in %.3f seconds = %.1f fps (%.1f ms/frame)",
                                frame_num, stats_dropped_frames, elapsed, frame_num / elapsed,
@@ -784,12 +968,16 @@ void Mixer::thread_func()
                                                long(limit.rlim_cur / 1048576),
                                                float(100.0 * (used.ru_maxrss * 1024.0) / limit.rlim_cur));
                                }
+                               metrics_memory_locked_limit_bytes = limit.rlim_cur;
                        } else {
                                printf(", using %ld MB memory (not locked)",
                                        long(used.ru_maxrss / 1024));
+                               metrics_memory_locked_limit_bytes = 0.0 / 0.0;
                        }
 
                        printf("\n");
+
+                       metrics_memory_used_bytes = used.ru_maxrss;
                }
 
 
@@ -857,6 +1045,9 @@ void Mixer::trim_queue(CaptureCard *card, unsigned card_index)
                ++dropped_frames;
        }
 
+       metric_input_queue_length_frames = queue_length;
+       card->metric_input_dropped_frames_jitter += dropped_frames;
+
 #if 0
        if (dropped_frames > 0) {
                fprintf(stderr, "Card %u dropped %u frame(s) to keep latency down.\n",
@@ -898,7 +1089,7 @@ start:
                        cards[master_card_index].new_frames.front().received_timestamp;
        }
 
-       for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+       for (unsigned card_index = 0; card_index < num_cards + num_video_inputs; ++card_index) {
                CaptureCard *card = &cards[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,
@@ -940,7 +1131,7 @@ 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, /*output=*/nullptr);
+                       configure_card(card_index, capture, CardType::FAKE_CAPTURE, /*output=*/nullptr);
                        card->queue_length_policy.reset(card_index);
                        card->capture->start_bm_capture();
                }
@@ -970,7 +1161,7 @@ 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, /*output=*/nullptr);
+                       configure_card(free_card_index, capture, CardType::LIVE_CARD, /*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();
@@ -1021,12 +1212,29 @@ void Mixer::render_one_frame(int64_t duration)
                printf("Timecode: '%s'\n", timecode_text.c_str());
        }
 
+       // Update Y'CbCr settings for all cards.
+       {
+               unique_lock<mutex> lock(card_mutex);
+               for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+                       YCbCrInterpretation *interpretation = &ycbcr_interpretation[card_index];
+                       input_state.ycbcr_coefficients_auto[card_index] = interpretation->ycbcr_coefficients_auto;
+                       input_state.ycbcr_coefficients[card_index] = interpretation->ycbcr_coefficients;
+                       input_state.full_range[card_index] = interpretation->full_range;
+               }
+       }
+
        // Get the main chain from the theme, and set its state immediately.
        Theme::Chain theme_main_chain = theme->get_chain(0, pts(), global_flags.width, global_flags.height, input_state);
        EffectChain *chain = theme_main_chain.chain;
        theme_main_chain.setup_chain();
        //theme_main_chain.chain->enable_phase_timing(true);
 
+       // The theme can't (or at least shouldn't!) call connect_signal() on
+       // each FFmpeg input, so we'll do it here.
+       for (const pair<LiveInputWrapper *, FFmpegCapture *> &conn : theme->get_signal_connections()) {
+               conn.first->connect_signal_raw(conn.second->get_card_index());
+       }
+
        // If HDMI/SDI output is active and the user has requested auto mode,
        // its mode overrides the existing Y'CbCr setting for the chain.
        YCbCrLumaCoefficients ycbcr_output_coefficients;
@@ -1216,6 +1424,18 @@ void Mixer::channel_clicked(int preview_num)
        theme->channel_clicked(preview_num);
 }
 
+YCbCrInterpretation Mixer::get_input_ycbcr_interpretation(unsigned card_index) const
+{
+       unique_lock<mutex> lock(card_mutex);
+       return ycbcr_interpretation[card_index];
+}
+
+void Mixer::set_input_ycbcr_interpretation(unsigned card_index, const YCbCrInterpretation &interpretation)
+{
+       unique_lock<mutex> lock(card_mutex);
+       ycbcr_interpretation[card_index] = interpretation;
+}
+
 void Mixer::start_mode_scanning(unsigned card_index)
 {
        assert(card_index < num_cards);
@@ -1233,7 +1453,7 @@ void Mixer::start_mode_scanning(unsigned card_index)
        last_mode_scan_change[card_index] = steady_clock::now();
 }
 
-map<uint32_t, bmusb::VideoMode> Mixer::get_available_output_video_modes() const
+map<uint32_t, VideoMode> Mixer::get_available_output_video_modes() const
 {
        assert(desired_output_card_index != -1);
        unique_lock<mutex> lock(card_mutex);
@@ -1261,10 +1481,12 @@ void Mixer::OutputChannel::output_frame(DisplayFrame frame)
                }
                ready_frame = frame;
                has_ready_frame = true;
-       }
 
-       if (new_frame_ready_callback) {
-               new_frame_ready_callback();
+               // Call the callbacks under the mutex (they should be short),
+               // so that we don't race against a callback removal.
+               for (const auto &key_and_callback : new_frame_ready_callbacks) {
+                       key_and_callback.second();
+               }
        }
 
        // Reduce the number of callbacks by filtering duplicates. The reason
@@ -1331,9 +1553,16 @@ bool Mixer::OutputChannel::get_display_frame(DisplayFrame *frame)
        return true;
 }
 
-void Mixer::OutputChannel::set_frame_ready_callback(Mixer::new_frame_ready_callback_t callback)
+void Mixer::OutputChannel::add_frame_ready_callback(void *key, Mixer::new_frame_ready_callback_t callback)
 {
-       new_frame_ready_callback = callback;
+       unique_lock<mutex> lock(frame_mutex);
+       new_frame_ready_callbacks[key] = callback;
+}
+
+void Mixer::OutputChannel::remove_frame_ready_callback(void *key)
+{
+       unique_lock<mutex> lock(frame_mutex);
+       new_frame_ready_callbacks.erase(key);
 }
 
 void Mixer::OutputChannel::set_transition_names_updated_callback(Mixer::transition_names_updated_callback_t callback)