+++ /dev/null
-#undef Success
-
-#include "mixer.h"
-
-#include <assert.h>
-#include <epoxy/egl.h>
-#include <movit/effect_chain.h>
-#include <movit/effect_util.h>
-#include <movit/flat_input.h>
-#include <movit/image_format.h>
-#include <movit/init.h>
-#include <movit/resource_pool.h>
-#include <pthread.h>
-#include <stdint.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <algorithm>
-#include <chrono>
-#include <condition_variable>
-#include <cstddef>
-#include <cstdint>
-#include <memory>
-#include <mutex>
-#include <ratio>
-#include <string>
-#include <thread>
-#include <utility>
-#include <vector>
-
-#include "DeckLinkAPI.h"
-#include "LinuxCOM.h"
-#include "alsa_output.h"
-#include "basic_stats.h"
-#include "bmusb/bmusb.h"
-#include "bmusb/fake_capture.h"
-#ifdef HAVE_CEF
-#include "cef_capture.h"
-#endif
-#include "chroma_subsampler.h"
-#include "context.h"
-#include "decklink_capture.h"
-#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"
-#include "timebase.h"
-#include "timecode_renderer.h"
-#include "v210_converter.h"
-#include "video_encoder.h"
-
-#undef Status
-#include <google/protobuf/util/json_util.h>
-#include "json.pb.h"
-
-class IDeckLink;
-class QOpenGLContext;
-
-using namespace movit;
-using namespace std;
-using namespace std::chrono;
-using namespace std::placeholders;
-using namespace bmusb;
-
-Mixer *global_mixer = nullptr;
-
-namespace {
-
-void insert_new_frame(RefCountedFrame frame, unsigned field_num, bool interlaced, unsigned card_index, InputState *input_state)
-{
- if (interlaced) {
- for (unsigned frame_num = FRAME_HISTORY_LENGTH; frame_num --> 1; ) { // :-)
- input_state->buffered_frames[card_index][frame_num] =
- input_state->buffered_frames[card_index][frame_num - 1];
- }
- input_state->buffered_frames[card_index][0] = { frame, field_num };
- } else {
- for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
- input_state->buffered_frames[card_index][frame_num] = { frame, field_num };
- }
- }
-}
-
-void ensure_texture_resolution(PBOFrameAllocator::Userdata *userdata, unsigned field, unsigned width, unsigned height, unsigned cbcr_width, unsigned cbcr_height, unsigned v210_width)
-{
- bool first;
- switch (userdata->pixel_format) {
- case PixelFormat_10BitYCbCr:
- first = userdata->tex_v210[field] == 0 || userdata->tex_444[field] == 0;
- 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] ||
- 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.
- 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();
- 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);
- check_error();
- 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();
- 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;
- default:
- assert(false);
- }
- 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])) {
- // Same as above; we need to recreate the texture.
- glBindTexture(GL_TEXTURE_2D, userdata->tex_v210[field]);
- check_error();
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB10_A2, v210_width, height, 0, GL_RGBA, GL_UNSIGNED_INT_2_10_10_10_REV, nullptr);
- check_error();
- userdata->last_v210_width[field] = v210_width;
- }
-}
-
-void upload_texture(GLuint tex, GLuint width, GLuint height, GLuint stride, bool interlaced_stride, GLenum format, GLenum type, GLintptr offset)
-{
- if (interlaced_stride) {
- stride *= 2;
- }
- if (global_flags.flush_pbos) {
- glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, offset, stride * height);
- check_error();
- }
-
- glBindTexture(GL_TEXTURE_2D, tex);
- check_error();
- if (interlaced_stride) {
- glPixelStorei(GL_UNPACK_ROW_LENGTH, width * 2);
- check_error();
- } else {
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- check_error();
- }
-
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, type, BUFFER_OFFSET(offset));
- check_error();
- glBindTexture(GL_TEXTURE_2D, 0);
- check_error();
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- check_error();
-}
-
-} // namespace
-
-void JitterHistory::register_metrics(const vector<pair<string, string>> &labels)
-{
- global_metrics.add("input_underestimated_jitter_frames", labels, &metric_input_underestimated_jitter_frames);
- global_metrics.add("input_estimated_max_jitter_seconds", labels, &metric_input_estimated_max_jitter_seconds, Metrics::TYPE_GAUGE);
-}
-
-void JitterHistory::unregister_metrics(const vector<pair<string, string>> &labels)
-{
- global_metrics.remove("input_underestimated_jitter_frames", labels);
- global_metrics.remove("input_estimated_max_jitter_seconds", labels);
-}
-
-void JitterHistory::frame_arrived(steady_clock::time_point now, int64_t frame_duration, size_t dropped_frames)
-{
- if (expected_timestamp > steady_clock::time_point::min()) {
- expected_timestamp += dropped_frames * nanoseconds(frame_duration * 1000000000 / TIMEBASE);
- double jitter_seconds = fabs(duration<double>(expected_timestamp - now).count());
- history.push_back(orders.insert(jitter_seconds));
- if (jitter_seconds > estimate_max_jitter()) {
- ++metric_input_underestimated_jitter_frames;
- }
-
- metric_input_estimated_max_jitter_seconds = estimate_max_jitter();
-
- if (history.size() > history_length) {
- orders.erase(history.front());
- history.pop_front();
- }
- assert(history.size() <= history_length);
- }
- expected_timestamp = now + nanoseconds(frame_duration * 1000000000 / TIMEBASE);
-}
-
-double JitterHistory::estimate_max_jitter() const
-{
- if (orders.empty()) {
- return 0.0;
- }
- size_t elem_idx = lrint((orders.size() - 1) * percentile);
- if (percentile <= 0.5) {
- return *next(orders.begin(), elem_idx) * multiplier;
- } else {
- return *prev(orders.end(), orders.size() - elem_idx) * multiplier;
- }
-}
-
-void QueueLengthPolicy::register_metrics(const vector<pair<string, string>> &labels)
-{
- global_metrics.add("input_queue_safe_length_frames", labels, &metric_input_queue_safe_length_frames, Metrics::TYPE_GAUGE);
-}
-
-void QueueLengthPolicy::unregister_metrics(const vector<pair<string, string>> &labels)
-{
- global_metrics.remove("input_queue_safe_length_frames", labels);
-}
-
-void QueueLengthPolicy::update_policy(steady_clock::time_point now,
- steady_clock::time_point expected_next_frame,
- int64_t input_frame_duration,
- int64_t master_frame_duration,
- double max_input_card_jitter_seconds,
- double max_master_card_jitter_seconds)
-{
- double input_frame_duration_seconds = input_frame_duration / double(TIMEBASE);
- double master_frame_duration_seconds = master_frame_duration / double(TIMEBASE);
-
- // Figure out when we can expect the next frame for this card, assuming
- // worst-case jitter (ie., the frame is maximally late).
- double seconds_until_next_frame = max(duration<double>(expected_next_frame - now).count() + max_input_card_jitter_seconds, 0.0);
-
- // How many times are the master card expected to tick in that time?
- // We assume the master clock has worst-case jitter but not any rate
- // discrepancy, ie., it ticks as early as possible every time, but not
- // cumulatively.
- double frames_needed = (seconds_until_next_frame + max_master_card_jitter_seconds) / master_frame_duration_seconds;
-
- // As a special case, if the master card ticks faster than the input card,
- // we expect the queue to drain by itself even without dropping. But if
- // the difference is small (e.g. 60 Hz master and 59.94 input), it would
- // go slowly enough that the effect wouldn't really be appreciable.
- // We account for this by looking at the situation five frames ahead,
- // assuming everything else is the same.
- double frames_allowed;
- if (master_frame_duration < input_frame_duration) {
- frames_allowed = frames_needed + 5 * (input_frame_duration_seconds - master_frame_duration_seconds) / master_frame_duration_seconds;
- } else {
- frames_allowed = frames_needed;
- }
-
- safe_queue_length = max<int>(floor(frames_allowed), 0);
- metric_input_queue_safe_length_frames = safe_queue_length;
-}
-
-Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards)
- : httpd(),
- num_cards(num_cards),
- mixer_surface(create_surface(format)),
- h264_encoder_surface(create_surface(format)),
- decklink_output_surface(create_surface(format))
-{
- memcpy(ycbcr_interpretation, global_flags.ycbcr_interpretation, sizeof(ycbcr_interpretation));
- 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;
-
- resource_pool.reset(new ResourcePool);
- for (unsigned i = 0; i < NUM_OUTPUTS; ++i) {
- output_channel[i].parent = this;
- output_channel[i].channel = i;
- }
-
- ImageFormat inout_format;
- inout_format.color_space = COLORSPACE_sRGB;
- inout_format.gamma_curve = GAMMA_sRGB;
-
- // Matches the 4:2:0 format created by the main chain.
- YCbCrFormat ycbcr_format;
- ycbcr_format.chroma_subsampling_x = 2;
- ycbcr_format.chroma_subsampling_y = 2;
- if (global_flags.ycbcr_rec709_coefficients) {
- ycbcr_format.luma_coefficients = YCBCR_REC_709;
- } else {
- ycbcr_format.luma_coefficients = YCBCR_REC_601;
- }
- ycbcr_format.full_range = false;
- ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
- ycbcr_format.cb_x_position = 0.0f;
- ycbcr_format.cr_x_position = 0.0f;
- ycbcr_format.cb_y_position = 0.5f;
- ycbcr_format.cr_y_position = 0.5f;
-
- // Display chain; shows the live output produced by the main chain (or rather, a copy of it).
- display_chain.reset(new EffectChain(global_flags.width, global_flags.height, resource_pool.get()));
- check_error();
- GLenum type = global_flags.x264_bit_depth > 8 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_BYTE;
- display_input = new YCbCrInput(inout_format, ycbcr_format, global_flags.width, global_flags.height, YCBCR_INPUT_SPLIT_Y_AND_CBCR, type);
- display_chain->add_input(display_input);
- display_chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
- display_chain->set_dither_bits(0); // Don't bother.
- display_chain->finalize();
-
- 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));
-
- // Must be instantiated after VideoEncoder has initialized global_flags.use_zerocopy.
- theme.reset(new Theme(global_flags.theme_filename, global_flags.theme_dirs, resource_pool.get(), num_cards));
-
- // Must be instantiated after the theme, as the theme decides the number of FFmpeg inputs.
- std::vector<FFmpegCapture *> video_inputs = theme->get_video_inputs();
- audio_mixer.reset(new AudioMixer(num_cards, video_inputs.size()));
-
- httpd.add_endpoint("/channels", bind(&Mixer::get_channels_json, this), HTTPD::ALLOW_ALL_ORIGINS);
- for (int channel_idx = 2; channel_idx < theme->get_num_channels(); ++channel_idx) {
- char url[256];
- snprintf(url, sizeof(url), "/channels/%d/color", channel_idx);
- httpd.add_endpoint(url, bind(&Mixer::get_channel_color_http, this, unsigned(channel_idx)), HTTPD::ALLOW_ALL_ORIGINS);
- }
-
- // Start listening for clients only once VideoEncoder has written its header, if any.
- httpd.start(global_flags.http_port);
-
- // First try initializing the then PCI devices, then USB, then
- // fill up with fake cards until we have the desired number of cards.
- unsigned num_pci_devices = 0;
- unsigned card_index = 0;
-
- {
- IDeckLinkIterator *decklink_iterator = CreateDeckLinkIteratorInstance();
- if (decklink_iterator != nullptr) {
- for ( ; card_index < num_cards; ++card_index) {
- IDeckLink *decklink;
- if (decklink_iterator->Next(&decklink) != S_OK) {
- break;
- }
-
- 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);
- if (!output->set_device(decklink)) {
- delete output;
- output = nullptr;
- }
- configure_card(card_index, capture, CardType::LIVE_CARD, output);
- ++num_pci_devices;
- }
- decklink_iterator->Release();
- fprintf(stderr, "Found %u DeckLink PCI card(s).\n", num_pci_devices);
- } else {
- 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, 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, 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.
- 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();
-
-#ifdef HAVE_CEF
- // Same, for HTML inputs.
- std::vector<CEFCapture *> html_inputs = theme->get_html_inputs();
- for (unsigned html_card_index = 0; html_card_index < html_inputs.size(); ++card_index, ++html_card_index) {
- if (card_index >= MAX_VIDEO_CARDS) {
- fprintf(stderr, "ERROR: Not enough card slots available for the HTML inputs the theme requested.\n");
- exit(1);
- }
- configure_card(card_index, html_inputs[html_card_index], CardType::CEF_INPUT, /*output=*/nullptr);
- html_inputs[html_card_index]->set_card_index(card_index);
- }
- num_html_inputs = html_inputs.size();
-#endif
-
- 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 + num_video_inputs + num_html_inputs; ++card_index) {
- cards[card_index].queue_length_policy.reset(card_index);
- }
-
- chroma_subsampler.reset(new ChromaSubsampler(resource_pool.get()));
-
- if (global_flags.ten_bit_input) {
- if (!v210Converter::has_hardware_support()) {
- fprintf(stderr, "ERROR: --ten-bit-input requires support for OpenGL compute shaders\n");
- fprintf(stderr, " (OpenGL 4.3, or GL_ARB_compute_shader + GL_ARB_shader_image_load_store).\n");
- exit(1);
- }
- v210_converter.reset(new v210Converter());
-
- // These are all the widths listed in the Blackmagic SDK documentation
- // (section 2.7.3, “Display Modes”).
- v210_converter->precompile_shader(720);
- v210_converter->precompile_shader(1280);
- v210_converter->precompile_shader(1920);
- v210_converter->precompile_shader(2048);
- v210_converter->precompile_shader(3840);
- v210_converter->precompile_shader(4096);
- }
- if (global_flags.ten_bit_output) {
- if (!v210Converter::has_hardware_support()) {
- fprintf(stderr, "ERROR: --ten-bit-output requires support for OpenGL compute shaders\n");
- fprintf(stderr, " (OpenGL 4.3, or GL_ARB_compute_shader + GL_ARB_shader_image_load_store).\n");
- exit(1);
- }
- }
-
- timecode_renderer.reset(new TimecodeRenderer(resource_pool.get(), global_flags.width, global_flags.height));
- display_timecode_in_stream = global_flags.display_timecode_in_stream;
- display_timecode_on_stdout = global_flags.display_timecode_on_stdout;
-
- 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);
- }
-
- output_jitter_history.register_metrics({{ "card", "output" }});
-}
-
-Mixer::~Mixer()
-{
- httpd.stop();
- BMUSBCapture::stop_bm_thread();
-
- for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
- 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, CardType card_type, DeckLinkOutput *output)
-{
- printf("Configuring card %d...\n", card_index);
-
- CaptureCard *card = &cards[card_index];
- if (card->capture != nullptr) {
- card->capture->stop_dequeue_thread();
- }
- card->capture.reset(capture);
- card->is_fake_capture = (card_type == CardType::FAKE_CAPTURE);
- card->is_cef_capture = (card_type == CardType::CEF_INPUT);
- card->may_have_dropped_last_frame = false;
- card->type = card_type;
- if (card->output.get() != output) {
- card->output.reset(output);
- }
-
- PixelFormat pixel_format;
- if (card_type == CardType::FFMPEG_INPUT) {
- pixel_format = capture->get_current_pixel_format();
- } else if (card_type == CardType::CEF_INPUT) {
- pixel_format = PixelFormat_8BitBGRA;
- } 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) {
- card->frame_allocator.reset(new PBOFrameAllocator(pixel_format, 8 << 20, global_flags.width, global_flags.height)); // 8 MB.
- }
- card->capture->set_video_frame_allocator(card->frame_allocator.get());
- if (card->surface == nullptr) {
- card->surface = create_surface_with_same_format(mixer_surface);
- }
- while (!card->new_frames.empty()) card->new_frames.pop_front();
- card->last_timecode = -1;
- card->capture->set_pixel_format(pixel_format);
- card->capture->configure_card();
-
- // NOTE: start_bm_capture() happens in thread_func().
-
- DeviceSpec device;
- if (card_type == CardType::FFMPEG_INPUT) {
- device = DeviceSpec{InputSourceType::FFMPEG_VIDEO_INPUT, card_index - num_cards};
- } else {
- device = DeviceSpec{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();
-
- // Unregister old metrics, if any.
- if (!card->labels.empty()) {
- const vector<pair<string, string>> &labels = card->labels;
- card->jitter_history.unregister_metrics(labels);
- card->queue_length_policy.unregister_metrics(labels);
- global_metrics.remove("input_received_frames", labels);
- global_metrics.remove("input_dropped_frames_jitter", labels);
- global_metrics.remove("input_dropped_frames_error", labels);
- global_metrics.remove("input_dropped_frames_resets", labels);
- global_metrics.remove("input_queue_length_frames", labels);
- global_metrics.remove("input_queue_duped_frames", labels);
-
- global_metrics.remove("input_has_signal_bool", labels);
- global_metrics.remove("input_is_connected_bool", labels);
- global_metrics.remove("input_interlaced_bool", labels);
- global_metrics.remove("input_width_pixels", labels);
- global_metrics.remove("input_height_pixels", labels);
- global_metrics.remove("input_frame_rate_nom", labels);
- global_metrics.remove("input_frame_rate_den", labels);
- global_metrics.remove("input_sample_rate_hz", labels);
- }
-
- // 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;
- case CardType::CEF_INPUT:
- labels.emplace_back("cardtype", "cef");
- break;
- default:
- assert(false);
- }
- card->jitter_history.register_metrics(labels);
- card->queue_length_policy.register_metrics(labels);
- global_metrics.add("input_received_frames", labels, &card->metric_input_received_frames);
- 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_queue_length_frames", labels, &card->metric_input_queue_length_frames, Metrics::TYPE_GAUGE);
- global_metrics.add("input_queue_duped_frames", labels, &card->metric_input_duped_frames);
-
- 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);
- card->labels = labels;
-}
-
-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<mutex> 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).
- CaptureInterface *fake_capture = old_card->capture.get();
- lock.unlock();
- fake_capture->stop_dequeue_thread();
- lock.lock();
- old_card->capture = move(old_card->parked_capture); // TODO: reset the metrics
- old_card->is_fake_capture = false;
- old_card->capture->start_bm_capture();
- }
- if (card_index != -1) {
- CaptureCard *card = &cards[card_index];
- 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);
- 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);
- card->output->start_output(desired_output_video_mode, pts_int);
- }
- output_card_index = card_index;
- output_jitter_history.clear();
-}
-
-namespace {
-
-int unwrap_timecode(uint16_t current_wrapped, int last)
-{
- uint16_t last_wrapped = last & 0xffff;
- if (current_wrapped > last_wrapped) {
- return (last & ~0xffff) | current_wrapped;
- } else {
- return 0x10000 + ((last & ~0xffff) | current_wrapped);
- }
-}
-
-DeviceSpec card_index_to_device(unsigned card_index, unsigned num_cards)
-{
- if (card_index >= num_cards) {
- return DeviceSpec{InputSourceType::FFMPEG_VIDEO_INPUT, card_index - num_cards};
- } else {
- return DeviceSpec{InputSourceType::CAPTURE_CARD, card_index};
- }
-}
-
-} // namespace
-
-void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
- FrameAllocator::Frame video_frame, size_t video_offset, VideoFormat video_format,
- FrameAllocator::Frame audio_frame, size_t audio_offset, AudioFormat audio_format)
-{
- DeviceSpec device = card_index_to_device(card_index, num_cards);
- CaptureCard *card = &cards[card_index];
-
- ++card->metric_input_received_frames;
- 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.
- is_mode_scanning[card_index] = false;
- } else {
- static constexpr double switch_time_s = 0.1; // Should be enough time for the signal to stabilize.
- steady_clock::time_point now = steady_clock::now();
- double sec_since_last_switch = duration<double>(steady_clock::now() - last_mode_scan_change[card_index]).count();
- if (sec_since_last_switch > switch_time_s) {
- // It isn't this mode; try the next one.
- mode_scanlist_index[card_index]++;
- mode_scanlist_index[card_index] %= mode_scanlist[card_index].size();
- cards[card_index].capture->set_video_mode(mode_scanlist[card_index][mode_scanlist_index[card_index]]);
- last_mode_scan_change[card_index] = now;
- }
- }
- }
-
- int64_t frame_length = int64_t(TIMEBASE) * video_format.frame_rate_den / video_format.frame_rate_nom;
- assert(frame_length > 0);
-
- 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;
- if (num_samples > OUTPUT_FREQUENCY / 10 && card->type != CardType::FFMPEG_INPUT) {
- 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",
- spec_to_string(device).c_str(), int(audio_frame.len), int(audio_offset),
- timecode, int(video_frame.len), int(video_offset), video_format.id);
- if (video_frame.owner) {
- video_frame.owner->release_frame(video_frame);
- }
- if (audio_frame.owner) {
- audio_frame.owner->release_frame(audio_frame);
- }
- return;
- }
-
- int dropped_frames = 0;
- if (card->last_timecode != -1) {
- dropped_frames = unwrap_timecode(timecode, card->last_timecode) - card->last_timecode - 1;
- }
-
- // Number of samples per frame if we need to insert silence.
- // (Could be nonintegral, but resampling will save us then.)
- const int silence_samples = OUTPUT_FREQUENCY * video_format.frame_rate_den / video_format.frame_rate_nom;
-
- if (dropped_frames > MAX_FPS * 2) {
- fprintf(stderr, "%s lost more than two seconds (or time code jumping around; from 0x%04x to 0x%04x), resetting resampler\n",
- spec_to_string(device).c_str(), 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, "%s dropped %d frame(s) (before timecode 0x%04x), inserting silence.\n",
- spec_to_string(device).c_str(), dropped_frames, timecode);
- card->metric_input_dropped_frames_error += dropped_frames;
-
- bool success;
- do {
- success = audio_mixer->add_silence(device, silence_samples, dropped_frames, frame_length);
- } while (!success);
- }
-
- if (num_samples > 0) {
- audio_mixer->add_audio(device, audio_frame.data + audio_offset, num_samples, audio_format, frame_length, audio_frame.received_timestamp);
- }
-
- // Done with the audio, so release it.
- if (audio_frame.owner) {
- audio_frame.owner->release_frame(audio_frame);
- }
-
- 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) {
- printf("%s: Dropping video frame with wrong length (%ld; expected %ld)\n",
- spec_to_string(device).c_str(), video_frame.len - video_offset, expected_length);
- }
- if (video_frame.owner) {
- video_frame.owner->release_frame(video_frame);
- }
-
- // Still send on the information that we _had_ a frame, even though it's corrupted,
- // so that pts can go up accordingly.
- {
- unique_lock<mutex> lock(card_mutex);
- CaptureCard::NewFrame new_frame;
- new_frame.frame = RefCountedFrame(FrameAllocator::Frame());
- new_frame.length = frame_length;
- new_frame.interlaced = false;
- new_frame.dropped_frames = dropped_frames;
- new_frame.received_timestamp = video_frame.received_timestamp;
- card->new_frames.push_back(move(new_frame));
- card->jitter_history.frame_arrived(video_frame.received_timestamp, frame_length, dropped_frames);
- }
- card->new_frames_changed.notify_all();
- return;
- }
-
- unsigned num_fields = video_format.interlaced ? 2 : 1;
- steady_clock::time_point frame_upload_start;
- bool interlaced_stride = false;
- if (video_format.interlaced) {
- // Send the two fields along as separate frames; the other side will need to add
- // 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;
- if (video_format.second_field_start == 1) {
- interlaced_stride = true;
- }
- frame_upload_start = steady_clock::now();
- }
- userdata->last_interlaced = video_format.interlaced;
- userdata->last_has_signal = video_format.has_signal;
- userdata->last_is_connected = video_format.is_connected;
- userdata->last_frame_rate_nom = video_format.frame_rate_nom;
- userdata->last_frame_rate_den = video_format.frame_rate_den;
- RefCountedFrame frame(video_frame);
-
- // Upload the textures.
- 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
- // faster, depending on the GPU and driver), but it appears to be trickling
- // driver bugs very easily.
- //
- // 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, cbcr_height, interlaced_stride, userdata]() {
- unsigned field_start_line;
- if (field == 1) {
- field_start_line = video_format.second_field_start;
- } else {
- field_start_line = video_format.extra_lines_top;
- }
-
- // 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, cbcr_width, cbcr_height, v210_width);
-
- glBindBuffer(GL_PIXEL_UNPACK_BUFFER, userdata->pbo);
- check_error();
-
- 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);
- 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, 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);
- check_error();
- };
-
- if (field == 1) {
- // Don't upload the second field as fast as we can; wait until
- // the field time has approximately passed. (Otherwise, we could
- // get timing jitter against the other sources, and possibly also
- // against the video display, although the latter is not as critical.)
- // This requires our system clock to be reasonably close to the
- // video clock, but that's not an unreasonable assumption.
- steady_clock::time_point second_field_start = frame_upload_start +
- nanoseconds(frame_length * 1000000000 / TIMEBASE);
- this_thread::sleep_until(second_field_start);
- }
-
- {
- unique_lock<mutex> lock(card_mutex);
- CaptureCard::NewFrame new_frame;
- new_frame.frame = frame;
- new_frame.length = frame_length;
- new_frame.field = field;
- new_frame.interlaced = video_format.interlaced;
- new_frame.upload_func = upload_func;
- new_frame.dropped_frames = dropped_frames;
- new_frame.received_timestamp = video_frame.received_timestamp; // Ignore the audio timestamp.
- card->new_frames.push_back(move(new_frame));
- card->jitter_history.frame_arrived(video_frame.received_timestamp, frame_length, dropped_frames);
- card->may_have_dropped_last_frame = false;
- }
- card->new_frames_changed.notify_all();
- }
-}
-
-void Mixer::bm_hotplug_add(libusb_device *dev)
-{
- lock_guard<mutex> lock(hotplug_mutex);
- hotplugged_cards.push_back(dev);
-}
-
-void Mixer::bm_hotplug_remove(unsigned card_index)
-{
- cards[card_index].new_frames_changed.notify_all();
-}
-
-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)) {
- printf("oops\n");
- exit(1);
- }
-
- // 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 + num_video_inputs + num_html_inputs; ++card_index) {
- if (int(card_index) != output_card_index) {
- cards[card_index].capture->start_bm_capture();
- }
- }
-
- BasicStats basic_stats(/*verbose=*/true, /*use_opengl=*/true);
- int stats_dropped_frames = 0;
-
- while (!should_quit) {
- if (desired_output_card_index != output_card_index) {
- set_output_card_internal(desired_output_card_index);
- }
- if (output_card_index != -1 &&
- desired_output_video_mode != output_video_mode) {
- DeckLinkOutput *output = cards[output_card_index].output.get();
- output->end_output();
- desired_output_video_mode = output_video_mode = output->pick_video_mode(desired_output_video_mode);
- output->start_output(desired_output_video_mode, pts_int);
- }
-
- CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS];
- bool has_new_frame[MAX_VIDEO_CARDS] = { false };
-
- 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 + num_video_inputs);
- }
-
- 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, output_frame_info.frame_timestamp);
- stats_dropped_frames += output_frame_info.dropped_frames;
-
- handle_hotplugged_cards();
-
- for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
- DeviceSpec device = card_index_to_device(card_index, num_cards);
- if (card_index == master_card_index || !has_new_frame[card_index]) {
- continue;
- }
- if (new_frames[card_index].frame->len == 0) {
- ++new_frames[card_index].dropped_frames;
- }
- if (new_frames[card_index].dropped_frames > 0) {
- printf("%s dropped %d frames before this\n",
- spec_to_string(device).c_str(), int(new_frames[card_index].dropped_frames));
- }
- }
-
- // 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 (!master_card_is_output && new_frames[master_card_index].frame->len == 0) {
- ++stats_dropped_frames;
- pts_int += new_frames[master_card_index].length;
- continue;
- }
-
- for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
- if (!has_new_frame[card_index] || new_frames[card_index].frame->len == 0)
- continue;
-
- CaptureCard::NewFrame *new_frame = &new_frames[card_index];
- assert(new_frame->frame != nullptr);
- insert_new_frame(new_frame->frame, new_frame->field, new_frame->interlaced, card_index, &input_state);
- check_error();
-
- // The new texture might need uploading before use.
- if (new_frame->upload_func) {
- new_frame->upload_func();
- new_frame->upload_func = nullptr;
- }
- }
-
- int64_t frame_duration = output_frame_info.frame_duration;
- render_one_frame(frame_duration);
- {
- lock_guard<mutex> lock(frame_num_mutex);
- ++frame_num;
- }
- frame_num_updated.notify_all();
- pts_int += frame_duration;
-
- basic_stats.update(frame_num, stats_dropped_frames);
- // if (frame_num % 100 == 0) chain->print_phase_timing();
-
- if (should_cut.exchange(false)) { // Test and clear.
- video_encoder->do_cut(frame_num);
- }
-
-#if 0
- // Reset every 100 frames, so that local variations in frame times
- // (especially for the first few frames, when the shaders are
- // compiled etc.) don't make it hard to measure for the entire
- // remaining duration of the program.
- if (frame == 10000) {
- frame = 0;
- start = now;
- }
-#endif
- check_error();
- }
-
- resource_pool->clean_context();
-}
-
-bool Mixer::input_card_is_master_clock(unsigned card_index, unsigned master_card_index) const
-{
- 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);
-}
-
-void Mixer::trim_queue(CaptureCard *card, size_t safe_queue_length)
-{
- // Count the number of frames in the queue, including any frames
- // we dropped. It's hard to know exactly how we should deal with
- // dropped (corrupted) input frames; they don't help our goal of
- // avoiding starvation, but they still add to the problem of latency.
- // Since dropped frames is going to mean a bump in the signal anyway,
- // we err on the side of having more stable latency instead.
- unsigned queue_length = 0;
- for (const CaptureCard::NewFrame &frame : card->new_frames) {
- queue_length += frame.dropped_frames + 1;
- }
-
- // If needed, drop frames until the queue is below the safe limit.
- // We prefer to drop from the head, because all else being equal,
- // we'd like more recent frames (less latency).
- unsigned dropped_frames = 0;
- while (queue_length > safe_queue_length) {
- assert(!card->new_frames.empty());
- assert(queue_length > card->new_frames.front().dropped_frames);
- queue_length -= card->new_frames.front().dropped_frames;
-
- if (queue_length <= safe_queue_length) {
- // No need to drop anything.
- break;
- }
-
- card->new_frames.pop_front();
- card->new_frames_changed.notify_all();
- --queue_length;
- ++dropped_frames;
-
- if (queue_length == 0 && card->is_cef_capture) {
- card->may_have_dropped_last_frame = true;
- }
- }
-
- card->metric_input_dropped_frames_jitter += dropped_frames;
- card->metric_input_queue_length_frames = queue_length;
-
-#if 0
- if (dropped_frames > 0) {
- fprintf(stderr, "Card %u dropped %u frame(s) to keep latency down.\n",
- card_index, dropped_frames);
- }
-#endif
-}
-
-pair<string, string> Mixer::get_channels_json()
-{
- Channels ret;
- for (int channel_idx = 2; channel_idx < theme->get_num_channels(); ++channel_idx) {
- Channel *channel = ret.add_channel();
- channel->set_index(channel_idx);
- channel->set_name(theme->get_channel_name(channel_idx));
- channel->set_color(theme->get_channel_color(channel_idx));
- }
- string contents;
- google::protobuf::util::MessageToJsonString(ret, &contents); // Ignore any errors.
- return make_pair(contents, "text/json");
-}
-
-pair<string, string> Mixer::get_channel_color_http(unsigned channel_idx)
-{
- return make_pair(theme->get_channel_color(channel_idx), "text/plain");
-}
-
-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:
- unique_lock<mutex> 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, &output_frame_info.frame_timestamp);
- 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 (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());
- handle_hotplugged_cards();
- lock.unlock();
- goto start;
- }
-
- for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
- CaptureCard *card = &cards[card_index];
- if (card->new_frames.empty()) { // Starvation.
- ++card->metric_input_duped_frames;
-#ifdef HAVE_CEF
- if (card->is_cef_capture && card->may_have_dropped_last_frame) {
- // Unlike other sources, CEF is not guaranteed to send us a steady
- // stream of frames, so we'll have to ask it to repaint the frame
- // we dropped. (may_have_dropped_last_frame is set whenever we
- // trim the queue completely away, and cleared when we actually
- // get a new frame.)
- ((CEFCapture *)card->capture.get())->request_new_frame();
- }
-#endif
- } else {
- new_frames[card_index] = move(card->new_frames.front());
- has_new_frame[card_index] = true;
- card->new_frames.pop_front();
- card->new_frames_changed.notify_all();
- }
- }
-
- if (!master_card_is_output) {
- output_frame_info.frame_timestamp = new_frames[master_card_index].received_timestamp;
- output_frame_info.dropped_frames = new_frames[master_card_index].dropped_frames;
- output_frame_info.frame_duration = new_frames[master_card_index].length;
- }
-
- if (!output_frame_info.is_preroll) {
- output_jitter_history.frame_arrived(output_frame_info.frame_timestamp, output_frame_info.frame_duration, output_frame_info.dropped_frames);
- }
-
- for (unsigned card_index = 0; card_index < num_cards + num_video_inputs + num_html_inputs; ++card_index) {
- CaptureCard *card = &cards[card_index];
- if (has_new_frame[card_index] &&
- !input_card_is_master_clock(card_index, master_card_index) &&
- !output_frame_info.is_preroll) {
- card->queue_length_policy.update_policy(
- output_frame_info.frame_timestamp,
- card->jitter_history.get_expected_next_frame(),
- new_frames[master_card_index].length,
- output_frame_info.frame_duration,
- card->jitter_history.estimate_max_jitter(),
- output_jitter_history.estimate_max_jitter());
- trim_queue(card, min<int>(global_flags.max_input_queue_frames,
- card->queue_length_policy.get_safe_queue_length()));
- }
- }
-
- // This might get off by a fractional sample when changing master card
- // between ones with different frame rates, but that's fine.
- int num_samples_times_timebase = OUTPUT_FREQUENCY * output_frame_info.frame_duration + fractional_samples;
- output_frame_info.num_samples = num_samples_times_timebase / TIMEBASE;
- fractional_samples = num_samples_times_timebase % TIMEBASE;
- assert(output_frame_info.num_samples >= 0);
-
- return output_frame_info;
-}
-
-void Mixer::handle_hotplugged_cards()
-{
- // Check for cards that have been disconnected since last frame.
- for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
- CaptureCard *card = &cards[card_index];
- 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, CardType::FAKE_CAPTURE, /*output=*/nullptr);
- card->queue_length_policy.reset(card_index);
- card->capture->start_bm_capture();
- }
- }
-
- // Check for cards that have been connected since last frame.
- vector<libusb_device *> hotplugged_cards_copy;
- {
- lock_guard<mutex> lock(hotplug_mutex);
- swap(hotplugged_cards, hotplugged_cards_copy);
- }
- for (libusb_device *new_dev : hotplugged_cards_copy) {
- // Look for a fake capture card where we can stick this in.
- 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 = card_index;
- break;
- }
- }
-
- if (free_card_index == -1) {
- fprintf(stderr, "New card plugged in, but no free slots -- ignoring.\n");
- libusb_unref_device(new_dev);
- } else {
- // BMUSBCapture takes ownership.
- 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, 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();
- }
- }
-}
-
-
-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)
-{
- // Resample the audio as needed, including from previously dropped frames.
- assert(num_cards > 0);
- for (unsigned frame_num = 0; frame_num < dropped_frames + 1; ++frame_num) {
- const bool dropped_frame = (frame_num != dropped_frames);
- {
- // Signal to the audio thread to process this frame.
- // Note that if the frame is a dropped frame, we signal that
- // we don't want to use this frame as base for adjusting
- // the resampler rate. The reason for this is that the timing
- // of these frames is often way too late; they typically don't
- // “arrive” before we synthesize them. Thus, we could end up
- // in a situation where we have inserted e.g. five audio frames
- // into the queue before we then start pulling five of them
- // back out. This makes ResamplingQueue overestimate the delay,
- // causing undue resampler changes. (We _do_ use the last,
- // non-dropped frame; perhaps we should just discard that as well,
- // 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<mutex> lock(audio_mutex);
- bool adjust_rate = !dropped_frame && !is_preroll;
- audio_task_queue.push(AudioTask{pts_int, num_samples_per_frame, adjust_rate, frame_timestamp});
- audio_task_queue_changed.notify_one();
- }
- if (dropped_frame) {
- // For dropped frames, increase the pts. Note that if the format changed
- // in the meantime, we have no way of detecting that; we just have to
- // assume the frame length is always the same.
- pts_int += length_per_frame;
- }
- }
-}
-
-void Mixer::render_one_frame(int64_t duration)
-{
- // Determine the time code for this frame before we start rendering.
- string timecode_text = timecode_renderer->get_timecode_text(double(pts_int) / TIMEBASE, frame_num);
- if (display_timecode_on_stdout) {
- 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);
-
- // 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;
- if (global_flags.ycbcr_auto_coefficients && output_card_index != -1) {
- ycbcr_output_coefficients = cards[output_card_index].output->preferred_ycbcr_coefficients();
- } else {
- ycbcr_output_coefficients = global_flags.ycbcr_rec709_coefficients ? YCBCR_REC_709 : YCBCR_REC_601;
- }
-
- // TODO: Reduce the duplication against theme.cpp.
- YCbCrFormat output_ycbcr_format;
- output_ycbcr_format.chroma_subsampling_x = 1;
- output_ycbcr_format.chroma_subsampling_y = 1;
- output_ycbcr_format.luma_coefficients = ycbcr_output_coefficients;
- output_ycbcr_format.full_range = false;
- output_ycbcr_format.num_levels = 1 << global_flags.x264_bit_depth;
- chain->change_ycbcr_output_format(output_ycbcr_format);
-
- // Render main chain. If we're using zerocopy Quick Sync encoding
- // (the default case), we take an extra copy of the created outputs,
- // so that we can display it back to the screen later (it's less memory
- // bandwidth than writing and reading back an RGBA texture, even at 16-bit).
- // Ideally, we'd like to avoid taking copies and just use the main textures
- // for display as well, but they're just views into VA-API memory and must be
- // unmapped during encoding, so we can't use them for display, unfortunately.
- GLuint y_tex, cbcr_full_tex, cbcr_tex;
- GLuint y_copy_tex, cbcr_copy_tex = 0;
- GLuint y_display_tex, cbcr_display_tex;
- GLenum y_type = (global_flags.x264_bit_depth > 8) ? GL_R16 : GL_R8;
- GLenum cbcr_type = (global_flags.x264_bit_depth > 8) ? GL_RG16 : GL_RG8;
- const bool is_zerocopy = video_encoder->is_zerocopy();
- if (is_zerocopy) {
- cbcr_full_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width, global_flags.height);
- y_copy_tex = resource_pool->create_2d_texture(y_type, global_flags.width, global_flags.height);
- cbcr_copy_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width / 2, global_flags.height / 2);
-
- y_display_tex = y_copy_tex;
- cbcr_display_tex = cbcr_copy_tex;
-
- // y_tex and cbcr_tex will be given by VideoEncoder.
- } else {
- cbcr_full_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width, global_flags.height);
- y_tex = resource_pool->create_2d_texture(y_type, global_flags.width, global_flags.height);
- cbcr_tex = resource_pool->create_2d_texture(cbcr_type, global_flags.width / 2, global_flags.height / 2);
-
- y_display_tex = y_tex;
- cbcr_display_tex = cbcr_tex;
- }
-
- const int64_t av_delay = lrint(global_flags.audio_queue_length_ms * 0.001 * TIMEBASE); // Corresponds to the delay in ResamplingQueue.
- bool got_frame = video_encoder->begin_frame(pts_int + av_delay, duration, ycbcr_output_coefficients, theme_main_chain.input_frames, &y_tex, &cbcr_tex);
- assert(got_frame);
-
- GLuint fbo;
- if (is_zerocopy) {
- fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex, y_copy_tex);
- } else {
- fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex);
- }
- check_error();
- chain->render_to_fbo(fbo, global_flags.width, global_flags.height);
-
- if (display_timecode_in_stream) {
- // Render the timecode on top.
- timecode_renderer->render_timecode(fbo, timecode_text);
- }
-
- resource_pool->release_fbo(fbo);
-
- if (is_zerocopy) {
- chroma_subsampler->subsample_chroma(cbcr_full_tex, global_flags.width, global_flags.height, cbcr_tex, cbcr_copy_tex);
- } else {
- 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, ycbcr_output_coefficients, theme_main_chain.input_frames, pts_int, duration);
- }
- resource_pool->release_2d_texture(cbcr_full_tex);
-
- // Set the right state for the Y' and CbCr textures we use for display.
- glBindFramebuffer(GL_FRAMEBUFFER, 0);
- glBindTexture(GL_TEXTURE_2D, y_display_tex);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-
- glBindTexture(GL_TEXTURE_2D, cbcr_display_tex);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-
- RefCountedGLsync fence = video_encoder->end_frame();
-
- // The live frame pieces the Y'CbCr texture copies back into RGB and displays them.
- // It owns y_display_tex and cbcr_display_tex now (whichever textures they are).
- DisplayFrame live_frame;
- live_frame.chain = display_chain.get();
- live_frame.setup_chain = [this, y_display_tex, cbcr_display_tex]{
- display_input->set_texture_num(0, y_display_tex);
- display_input->set_texture_num(1, cbcr_display_tex);
- };
- live_frame.ready_fence = fence;
- live_frame.input_frames = {};
- live_frame.temp_textures = { y_display_tex, cbcr_display_tex };
- output_channel[OUTPUT_LIVE].output_frame(move(live_frame));
-
- // Set up preview and any additional channels.
- for (int i = 1; i < theme->get_num_channels() + 2; ++i) {
- DisplayFrame display_frame;
- Theme::Chain chain = theme->get_chain(i, pts(), global_flags.width, global_flags.height, input_state); // FIXME: dimensions
- display_frame.chain = move(chain.chain);
- display_frame.setup_chain = move(chain.setup_chain);
- display_frame.ready_fence = fence;
- display_frame.input_frames = move(chain.input_frames);
- display_frame.temp_textures = {};
- output_channel[i].output_frame(move(display_frame));
- }
-}
-
-void Mixer::audio_thread_func()
-{
- pthread_setname_np(pthread_self(), "Mixer_Audio");
-
- while (!should_quit) {
- AudioTask task;
-
- {
- unique_lock<mutex> lock(audio_mutex);
- audio_task_queue_changed.wait(lock, [this]{ return should_quit || !audio_task_queue.empty(); });
- if (should_quit) {
- return;
- }
- task = audio_task_queue.front();
- audio_task_queue.pop();
- }
-
- ResamplingQueue::RateAdjustmentPolicy rate_adjustment_policy =
- task.adjust_rate ? ResamplingQueue::ADJUST_RATE : ResamplingQueue::DO_NOT_ADJUST_RATE;
- vector<float> samples_out = audio_mixer->get_output(
- task.frame_timestamp,
- task.num_samples,
- rate_adjustment_policy);
-
- // Send the samples to the sound card, then add them to the output.
- if (alsa) {
- alsa->write(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));
- }
-}
-
-void Mixer::release_display_frame(DisplayFrame *frame)
-{
- for (GLuint texnum : frame->temp_textures) {
- resource_pool->release_2d_texture(texnum);
- }
- frame->temp_textures.clear();
- frame->ready_fence.reset();
- frame->input_frames.clear();
-}
-
-void Mixer::start()
-{
- mixer_thread = thread(&Mixer::thread_func, this);
- audio_thread = thread(&Mixer::audio_thread_func, this);
-}
-
-void Mixer::quit()
-{
- should_quit = true;
- audio_task_queue_changed.notify_one();
- mixer_thread.join();
- audio_thread.join();
-}
-
-void Mixer::transition_clicked(int transition_num)
-{
- theme->transition_clicked(transition_num, pts());
-}
-
-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);
- if (is_mode_scanning[card_index]) {
- return;
- }
- is_mode_scanning[card_index] = true;
- mode_scanlist[card_index].clear();
- for (const auto &mode : cards[card_index].capture->get_available_video_modes()) {
- mode_scanlist[card_index].push_back(mode.first);
- }
- assert(!mode_scanlist[card_index].empty());
- mode_scanlist_index[card_index] = 0;
- cards[card_index].capture->set_video_mode(mode_scanlist[card_index][0]);
- last_mode_scan_change[card_index] = steady_clock::now();
-}
-
-map<uint32_t, VideoMode> Mixer::get_available_output_video_modes() const
-{
- assert(desired_output_card_index != -1);
- unique_lock<mutex> lock(card_mutex);
- return cards[desired_output_card_index].output->get_available_video_modes();
-}
-
-string Mixer::get_ffmpeg_filename(unsigned card_index) const
-{
- assert(card_index >= num_cards && card_index < num_cards + num_video_inputs);
- return ((FFmpegCapture *)(cards[card_index].capture.get()))->get_filename();
-}
-
-void Mixer::set_ffmpeg_filename(unsigned card_index, const string &filename) {
- assert(card_index >= num_cards && card_index < num_cards + num_video_inputs);
- ((FFmpegCapture *)(cards[card_index].capture.get()))->change_filename(filename);
-}
-
-void Mixer::wait_for_next_frame()
-{
- unique_lock<mutex> lock(frame_num_mutex);
- unsigned old_frame_num = frame_num;
- frame_num_updated.wait_for(lock, seconds(1), // Timeout is just in case.
- [old_frame_num, this]{ return this->frame_num > old_frame_num; });
-}
-
-Mixer::OutputChannel::~OutputChannel()
-{
- if (has_current_frame) {
- parent->release_display_frame(¤t_frame);
- }
- if (has_ready_frame) {
- parent->release_display_frame(&ready_frame);
- }
-}
-
-void Mixer::OutputChannel::output_frame(DisplayFrame &&frame)
-{
- // Store this frame for display. Remove the ready frame if any
- // (it was seemingly never used).
- {
- unique_lock<mutex> lock(frame_mutex);
- if (has_ready_frame) {
- parent->release_display_frame(&ready_frame);
- }
- ready_frame = move(frame);
- has_ready_frame = true;
-
- // 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
- // why we bother doing this is that Qt seemingly can get into a state
- // where its builds up an essentially unbounded queue of signals,
- // consuming more and more memory, and there's no good way of collapsing
- // user-defined signals or limiting the length of the queue.
- if (transition_names_updated_callback) {
- vector<string> transition_names = global_mixer->get_transition_names();
- bool changed = false;
- if (transition_names.size() != last_transition_names.size()) {
- changed = true;
- } else {
- for (unsigned i = 0; i < transition_names.size(); ++i) {
- if (transition_names[i] != last_transition_names[i]) {
- changed = true;
- break;
- }
- }
- }
- if (changed) {
- transition_names_updated_callback(transition_names);
- last_transition_names = transition_names;
- }
- }
- if (name_updated_callback) {
- string name = global_mixer->get_channel_name(channel);
- if (name != last_name) {
- name_updated_callback(name);
- last_name = name;
- }
- }
- if (color_updated_callback) {
- string color = global_mixer->get_channel_color(channel);
- if (color != last_color) {
- color_updated_callback(color);
- last_color = color;
- }
- }
-}
-
-bool Mixer::OutputChannel::get_display_frame(DisplayFrame *frame)
-{
- unique_lock<mutex> lock(frame_mutex);
- if (!has_current_frame && !has_ready_frame) {
- return false;
- }
-
- if (has_current_frame && has_ready_frame) {
- // We have a new ready frame. Toss the current one.
- parent->release_display_frame(¤t_frame);
- has_current_frame = false;
- }
- if (has_ready_frame) {
- assert(!has_current_frame);
- current_frame = move(ready_frame);
- ready_frame.ready_fence.reset(); // Drop the refcount.
- ready_frame.input_frames.clear(); // Drop the refcounts.
- has_current_frame = true;
- has_ready_frame = false;
- }
-
- *frame = current_frame;
- return true;
-}
-
-void Mixer::OutputChannel::add_frame_ready_callback(void *key, Mixer::new_frame_ready_callback_t 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)
-{
- transition_names_updated_callback = callback;
-}
-
-void Mixer::OutputChannel::set_name_updated_callback(Mixer::name_updated_callback_t callback)
-{
- name_updated_callback = callback;
-}
-
-void Mixer::OutputChannel::set_color_updated_callback(Mixer::color_updated_callback_t callback)
-{
- color_updated_callback = callback;
-}
-
-mutex RefCountedGLsync::fence_lock;