-#define GL_GLEXT_PROTOTYPES 1
-#define NO_SDL_GLEXT 1
-#define NUM_CARDS 2
-
-#define WIDTH 1280
-#define HEIGHT 720
-
-#include <epoxy/gl.h>
-#include <epoxy/egl.h>
-
#undef Success
+#include "mixer.h"
+
#include <assert.h>
-#include <features.h>
-#include <math.h>
-#include <png.h>
-#include <pngconf.h>
-#include <setjmp.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 <movit/util.h>
+#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/time.h>
#include <time.h>
-#include <mutex>
-#include <queue>
+#include <algorithm>
+#include <cmath>
#include <condition_variable>
+#include <cstddef>
+#include <memory>
+#include <mutex>
+#include <string>
+#include <thread>
+#include <utility>
+#include <vector>
+#include <arpa/inet.h>
+#include <sys/time.h>
+#include <sys/resource.h>
-#include <diffusion_effect.h>
-#include <effect.h>
-#include <effect_chain.h>
-#include <flat_input.h>
-#include <image_format.h>
-#include <init.h>
-#include <lift_gamma_gain_effect.h>
-#include <saturation_effect.h>
-#include <util.h>
-#include <ycbcr_input.h>
-#include <vignette_effect.h>
-#include <resample_effect.h>
-#include <resize_effect.h>
-#include <overlay_effect.h>
-#include <padding_effect.h>
-#include <white_balance_effect.h>
-#include <ycbcr.h>
-#include <resource_pool.h>
-#include <effect_util.h>
-
-#include <EGL/egl.h>
-
-#include "h264encode.h"
+#include "bmusb/bmusb.h"
#include "context.h"
-#include "bmusb.h"
+#include "decklink_capture.h"
+#include "defs.h"
+#include "fake_capture.h"
+#include "flags.h"
+#include "video_encoder.h"
#include "pbo_frame_allocator.h"
+#include "ref_counted_gl_sync.h"
+#include "timebase.h"
+
+class QOpenGLContext;
using namespace movit;
using namespace std;
using namespace std::placeholders;
+using namespace bmusb;
+
+Mixer *global_mixer = nullptr;
+bool uses_mlock = false;
+namespace {
-std::mutex bmusb_mutex; // protects <cards>
+void convert_fixed24_to_fp32(float *dst, size_t out_channels, const uint8_t *src, size_t in_channels, size_t num_samples)
+{
+ assert(in_channels >= out_channels);
+ for (size_t i = 0; i < num_samples; ++i) {
+ for (size_t j = 0; j < out_channels; ++j) {
+ uint32_t s1 = *src++;
+ uint32_t s2 = *src++;
+ uint32_t s3 = *src++;
+ uint32_t s = s1 | (s1 << 8) | (s2 << 16) | (s3 << 24);
+ dst[i * out_channels + j] = int(s) * (1.0f / 4294967296.0f);
+ }
+ src += 3 * (in_channels - out_channels);
+ }
+}
-struct CaptureCard {
- BMUSBCapture *usb;
+void convert_fixed32_to_fp32(float *dst, size_t out_channels, const uint8_t *src, size_t in_channels, size_t num_samples)
+{
+ assert(in_channels >= out_channels);
+ for (size_t i = 0; i < num_samples; ++i) {
+ for (size_t j = 0; j < out_channels; ++j) {
+ // Note: Assumes little-endian.
+ int32_t s = *(int32_t *)src;
+ dst[i * out_channels + j] = s * (1.0f / 4294967296.0f);
+ src += 4;
+ }
+ src += 4 * (in_channels - out_channels);
+ }
+}
- // Threading stuff
- bool thread_initialized;
- QSurface *surface;
- QOpenGLContext *context;
+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 };
+ }
+ }
+}
- bool new_data_ready; // Whether new_frame contains anything.
- PBOFrameAllocator::Frame new_frame;
- GLsync new_data_ready_fence; // Whether new_frame is ready for rendering.
- std::condition_variable new_data_ready_changed; // Set whenever new_data_ready is changed.
-};
-CaptureCard cards[NUM_CARDS];
+} // namespace
-void bm_frame(int card_index, uint16_t timecode,
- FrameAllocator::Frame video_frame, size_t video_offset, uint16_t video_format,
- FrameAllocator::Frame audio_frame, size_t audio_offset, uint16_t audio_format)
+void QueueLengthPolicy::update_policy(int queue_length)
{
- CaptureCard *card = &cards[card_index];
- if (!card->thread_initialized) {
- printf("initializing context for bmusb thread %d\n", card_index);
- eglBindAPI(EGL_OPENGL_API);
- card->context = create_context();
- if (!make_current(card->context, card->surface)) {
- printf("failed to create bmusb context\n");
- exit(1);
- }
- card->thread_initialized = true;
- }
-
- if (video_frame.len - video_offset != 1280 * 750 * 2) {
- printf("dropping frame with wrong length (%ld)\n", video_frame.len - video_offset);
- FILE *fp = fopen("frame.raw", "wb");
- fwrite(video_frame.data, video_frame.len, 1, fp);
- fclose(fp);
- //exit(1);
- card->usb->get_video_frame_allocator()->release_frame(video_frame);
- card->usb->get_audio_frame_allocator()->release_frame(audio_frame);
+ if (queue_length < 0) { // Starvation.
+ if (been_at_safe_point_since_last_starvation && safe_queue_length < 5) {
+ ++safe_queue_length;
+ fprintf(stderr, "Card %u: Starvation, increasing safe limit to %u frames\n",
+ card_index, safe_queue_length);
+ }
+ frames_with_at_least_one = 0;
+ been_at_safe_point_since_last_starvation = false;
return;
}
- {
- // Wait until the previous frame was consumed.
- std::unique_lock<std::mutex> lock(bmusb_mutex);
- card->new_data_ready_changed.wait(lock, [card]{ return !card->new_data_ready; });
- }
- GLuint pbo = (GLint)(intptr_t)video_frame.userdata;
- check_error();
- glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, pbo);
- check_error();
- glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, video_frame.size);
- check_error();
- //glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
- //check_error();
- GLsync fence = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
- check_error();
- assert(fence != nullptr);
- {
- std::unique_lock<std::mutex> lock(bmusb_mutex);
- card->new_data_ready = true;
- card->new_frame = video_frame;
- card->new_data_ready_fence = fence;
- card->new_data_ready_changed.notify_all();
- }
-
- // Video frame will be released later.
- card->usb->get_audio_frame_allocator()->release_frame(audio_frame);
-}
-
-void place_rectangle(Effect *resample_effect, Effect *padding_effect, float x0, float y0, float x1, float y1)
-{
- float srcx0 = 0.0f;
- float srcx1 = 1.0f;
- float srcy0 = 0.0f;
- float srcy1 = 1.0f;
-
- // Cull.
- if (x0 > 1280.0 || x1 < 0.0 || y0 > 720.0 || y1 < 0.0) {
- CHECK(resample_effect->set_int("width", 1));
- CHECK(resample_effect->set_int("height", 1));
- CHECK(resample_effect->set_float("zoom_x", 1280.0));
- CHECK(resample_effect->set_float("zoom_y", 720.0));
- CHECK(padding_effect->set_int("left", 2000));
- CHECK(padding_effect->set_int("top", 2000));
- return;
- }
-
- // Clip. (TODO: Clip on upper/left sides, too.)
- if (x1 > 1280.0) {
- srcx1 = (1280.0 - x0) / (x1 - x0);
- x1 = 1280.0;
- }
- if (y1 > 720.0) {
- srcy1 = (720.0 - y0) / (y1 - y0);
- y1 = 720.0;
- }
-
- float x_subpixel_offset = x0 - floor(x0);
- float y_subpixel_offset = y0 - floor(y0);
-
- // Resampling must be to an integral number of pixels. Round up,
- // and then add an extra pixel so we have some leeway for the border.
- int width = int(ceil(x1 - x0)) + 1;
- int height = int(ceil(y1 - y0)) + 1;
- CHECK(resample_effect->set_int("width", width));
- CHECK(resample_effect->set_int("height", height));
-
- // Correct the discrepancy with zoom. (This will leave a small
- // excess edge of pixels and subpixels, which we'll correct for soon.)
- float zoom_x = (x1 - x0) / (width * (srcx1 - srcx0));
- float zoom_y = (y1 - y0) / (height * (srcy1 - srcy0));
- CHECK(resample_effect->set_float("zoom_x", zoom_x));
- CHECK(resample_effect->set_float("zoom_y", zoom_y));
- CHECK(resample_effect->set_float("zoom_center_x", 0.0f));
- CHECK(resample_effect->set_float("zoom_center_y", 0.0f));
-
- // Padding must also be to a whole-pixel offset.
- CHECK(padding_effect->set_int("left", floor(x0)));
- CHECK(padding_effect->set_int("top", floor(y0)));
-
- // Correct _that_ discrepancy by subpixel offset in the resampling.
- CHECK(resample_effect->set_float("left", -x_subpixel_offset / zoom_x));
- CHECK(resample_effect->set_float("top", -y_subpixel_offset / zoom_y));
-
- // Finally, adjust the border so it is exactly where we want it.
- CHECK(padding_effect->set_float("border_offset_left", x_subpixel_offset));
- CHECK(padding_effect->set_float("border_offset_right", x1 - (floor(x0) + width)));
- CHECK(padding_effect->set_float("border_offset_top", y_subpixel_offset));
- CHECK(padding_effect->set_float("border_offset_bottom", y1 - (floor(y0) + height)));
-}
-
-static bool quit = false;
-
-void mixer_thread_func(QSurface *surface, QSurface *surface2, QSurface *surface3, QSurface *surface4)
-{
- cards[0].surface = surface3;
-#if NUM_CARDS == 2
- cards[1].surface = surface4;
-#endif
-
- eglBindAPI(EGL_OPENGL_API);
- QOpenGLContext *context = create_context();
- if (!make_current(context, surface)) {
- printf("oops\n");
- exit(1);
+ if (queue_length > 0) {
+ if (queue_length >= int(safe_queue_length)) {
+ been_at_safe_point_since_last_starvation = true;
+ }
+ if (++frames_with_at_least_one >= 1000 && safe_queue_length > 0) {
+ --safe_queue_length;
+ fprintf(stderr, "Card %u: Spare frames for more than 1000 frames, reducing safe limit to %u frames\n",
+ card_index, safe_queue_length);
+ frames_with_at_least_one = 0;
+ }
+ } else {
+ frames_with_at_least_one = 0;
}
+}
+Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards)
+ : httpd(),
+ num_cards(num_cards),
+ mixer_surface(create_surface(format)),
+ h264_encoder_surface(create_surface(format)),
+ correlation(OUTPUT_FREQUENCY),
+ level_compressor(OUTPUT_FREQUENCY),
+ limiter(OUTPUT_FREQUENCY),
+ compressor(OUTPUT_FREQUENCY)
+{
CHECK(init_movit(MOVIT_SHADER_DIR, MOVIT_DEBUG_OFF));
check_error();
- EffectChain chain(WIDTH, HEIGHT);
- check_error();
+ // 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);
+ theme.reset(new Theme(global_flags.theme_filename.c_str(), resource_pool.get(), num_cards));
+ 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;
- YCbCrFormat ycbcr_format;
- ycbcr_format.chroma_subsampling_x = 2;
- ycbcr_format.chroma_subsampling_y = 1;
- ycbcr_format.cb_x_position = 0.0;
- ycbcr_format.cr_x_position = 0.0;
- ycbcr_format.cb_y_position = 0.5;
- ycbcr_format.cr_y_position = 0.5;
- ycbcr_format.luma_coefficients = YCBCR_REC_601;
- ycbcr_format.full_range = false;
-
- YCbCrInput *input[NUM_CARDS];
-
- input[0] = new YCbCrInput(inout_format, ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
- chain.add_input(input[0]);
- input[1] = new YCbCrInput(inout_format, ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
- chain.add_input(input[1]);
- Effect *resample_effect = chain.add_effect(new ResampleEffect(), input[0]);
- Effect *padding_effect = chain.add_effect(new IntegralPaddingEffect());
- float border_color[] = { 0.0f, 0.0f, 0.0f, 1.0f };
- CHECK(padding_effect->set_vec4("border_color", border_color));
-
- Effect *resample2_effect = chain.add_effect(new ResampleEffect(), input[1]);
- Effect *saturation_effect = chain.add_effect(new SaturationEffect());
- CHECK(saturation_effect->set_float("saturation", 0.3f));
- Effect *wb_effect = chain.add_effect(new WhiteBalanceEffect());
- CHECK(wb_effect->set_float("output_color_temperature", 3500.0));
- Effect *padding2_effect = chain.add_effect(new IntegralPaddingEffect());
-
- chain.add_effect(new OverlayEffect(), padding_effect, padding2_effect);
+ // Display chain; shows the live output produced by the main chain (its RGBA version).
+ display_chain.reset(new EffectChain(WIDTH, HEIGHT, resource_pool.get()));
+ check_error();
+ display_input = new FlatInput(inout_format, FORMAT_RGB, GL_UNSIGNED_BYTE, WIDTH, HEIGHT); // FIXME: GL_UNSIGNED_BYTE is really wrong.
+ 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();
- ycbcr_format.chroma_subsampling_x = 1;
+ video_encoder.reset(new VideoEncoder(resource_pool.get(), h264_encoder_surface, global_flags.va_display, WIDTH, HEIGHT, &httpd));
- chain.add_ycbcr_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED, ycbcr_format, YCBCR_OUTPUT_SPLIT_Y_AND_CBCR);
- chain.set_dither_bits(8);
- chain.set_output_origin(OUTPUT_ORIGIN_TOP_LEFT);
- chain.finalize();
+ // Start listening for clients only once VideoEncoder has written its header, if any.
+ httpd.start(9095);
- H264Encoder h264_encoder(surface2, WIDTH, HEIGHT, "test.mp4");
+ // First try initializing the fake devices, then PCI devices, then USB,
+ // until we have the desired number of cards.
+ unsigned num_pci_devices = 0, num_usb_devices = 0;
+ unsigned card_index = 0;
- printf("Configuring first card...\n");
- cards[0].usb = new BMUSBCapture(0x1edb, 0xbd3b); // 0xbd4f
- //cards[0].usb = new BMUSBCapture(0x1edb, 0xbd4f);
- cards[0].usb->set_frame_callback(std::bind(bm_frame, 0, _1, _2, _3, _4, _5, _6, _7));
- std::unique_ptr<PBOFrameAllocator> pbo_allocator1(new PBOFrameAllocator(1280 * 750 * 2 + 44));
- cards[0].usb->set_video_frame_allocator(pbo_allocator1.get());
- cards[0].usb->configure_card();
+ assert(global_flags.num_fake_cards >= 0); // Enforced in flags.cpp.
+ unsigned num_fake_cards = global_flags.num_fake_cards;
- std::unique_ptr<PBOFrameAllocator> pbo_allocator2(new PBOFrameAllocator(1280 * 750 * 2 + 44));
- if (NUM_CARDS == 2) {
- printf("Configuring second card...\n");
- cards[1].usb = new BMUSBCapture(0x1edb, 0xbd4f);
- cards[1].usb->set_frame_callback(std::bind(bm_frame, 1, _1, _2, _3, _4, _5, _6, _7));
- cards[1].usb->set_video_frame_allocator(pbo_allocator2.get());
- cards[1].usb->configure_card();
+ assert(num_fake_cards <= num_cards); // Enforced in flags.cpp.
+ for ( ; card_index < num_fake_cards; ++card_index) {
+ configure_card(card_index, new FakeCapture(card_index), /*is_fake_capture=*/true);
}
- BMUSBCapture::start_bm_thread();
-
- for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
- cards[card_index].usb->start_bm_capture();
+ if (global_flags.num_fake_cards > 0) {
+ fprintf(stderr, "Initialized %d fake cards.\n", global_flags.num_fake_cards);
}
- int frame = 0;
-#if _POSIX_C_SOURCE >= 199309L
- struct timespec start, now;
- clock_gettime(CLOCK_MONOTONIC, &start);
-#else
- struct timeval start, now;
- gettimeofday(&start, NULL);
-#endif
+ if (card_index < num_cards) {
+ 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;
+ }
+
+ configure_card(card_index, new DeckLinkCapture(decklink, card_index - num_fake_cards), /*is_fake_capture=*/false);
+ ++num_pci_devices;
+ }
+ decklink_iterator->Release();
+ fprintf(stderr, "Found %d DeckLink PCI card(s).\n", num_pci_devices);
+ } else {
+ fprintf(stderr, "DeckLink drivers not found. Probing for USB cards only.\n");
+ }
+ }
+ for ( ; card_index < num_cards; ++card_index) {
+ BMUSBCapture *capture = new BMUSBCapture(card_index - num_pci_devices - num_fake_cards);
+ capture->set_card_disconnected_callback(bind(&Mixer::bm_hotplug_remove, this, card_index));
+ configure_card(card_index, capture, /*is_fake_capture=*/false);
+ ++num_usb_devices;
+ }
- PBOFrameAllocator::Frame bmusb_current_rendering_frame[NUM_CARDS];
- for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
- bmusb_current_rendering_frame[card_index] =
- cards[card_index].usb->get_video_frame_allocator()->alloc_frame();
- GLint input_tex_pbo = (GLint)(intptr_t)bmusb_current_rendering_frame[card_index].userdata;
- input[card_index]->set_pixel_data(0, nullptr, input_tex_pbo);
- input[card_index]->set_pixel_data(1, nullptr, input_tex_pbo);
- check_error();
+ if (num_usb_devices > 0) {
+ has_bmusb_thread = true;
+ BMUSBCapture::set_card_connected_callback(bind(&Mixer::bm_hotplug_add, this, _1));
+ BMUSBCapture::start_bm_thread();
}
- //chain.enable_phase_timing(true);
+ for (card_index = 0; card_index < num_cards; ++card_index) {
+ cards[card_index].queue_length_policy.reset(card_index);
+ cards[card_index].capture->start_bm_capture();
+ }
// Set up stuff for NV12 conversion.
- ResourcePool *resource_pool = chain.get_resource_pool();
- GLuint chroma_tex = resource_pool->create_2d_texture(GL_RG8, WIDTH, HEIGHT);
// Cb/Cr shader.
- string cbcr_vert_shader = read_file("vs-cbcr.130.vert");
+ string cbcr_vert_shader =
+ "#version 130 \n"
+ " \n"
+ "in vec2 position; \n"
+ "in vec2 texcoord; \n"
+ "out vec2 tc0; \n"
+ "uniform vec2 foo_chroma_offset_0; \n"
+ " \n"
+ "void main() \n"
+ "{ \n"
+ " // The result of glOrtho(0.0, 1.0, 0.0, 1.0, 0.0, 1.0) is: \n"
+ " // \n"
+ " // 2.000 0.000 0.000 -1.000 \n"
+ " // 0.000 2.000 0.000 -1.000 \n"
+ " // 0.000 0.000 -2.000 -1.000 \n"
+ " // 0.000 0.000 0.000 1.000 \n"
+ " gl_Position = vec4(2.0 * position.x - 1.0, 2.0 * position.y - 1.0, -1.0, 1.0); \n"
+ " vec2 flipped_tc = texcoord; \n"
+ " tc0 = flipped_tc + foo_chroma_offset_0; \n"
+ "} \n";
string cbcr_frag_shader =
"#version 130 \n"
"in vec2 tc0; \n"
"uniform sampler2D cbcr_tex; \n"
+ "out vec4 FragColor; \n"
"void main() { \n"
- " gl_FragColor = texture2D(cbcr_tex, tc0); \n"
+ " FragColor = texture(cbcr_tex, tc0); \n"
"} \n";
- GLuint cbcr_program_num = resource_pool->compile_glsl_program(cbcr_vert_shader, cbcr_frag_shader);
+ vector<string> frag_shader_outputs;
+ cbcr_program_num = resource_pool->compile_glsl_program(cbcr_vert_shader, cbcr_frag_shader, frag_shader_outputs);
+
+ float vertices[] = {
+ 0.0f, 2.0f,
+ 0.0f, 0.0f,
+ 2.0f, 0.0f
+ };
+ cbcr_vbo = generate_vbo(2, GL_FLOAT, sizeof(vertices), vertices);
+ cbcr_position_attribute_index = glGetAttribLocation(cbcr_program_num, "position");
+ cbcr_texcoord_attribute_index = glGetAttribLocation(cbcr_program_num, "texcoord");
+
+ r128.init(2, OUTPUT_FREQUENCY);
+ r128.integr_start();
+
+ locut.init(FILTER_HPF, 2);
+
+ set_locut_enabled(global_flags.locut_enabled);
+ set_gain_staging_db(global_flags.initial_gain_staging_db);
+ set_gain_staging_auto(global_flags.gain_staging_auto);
+ set_compressor_enabled(global_flags.compressor_enabled);
+ set_limiter_enabled(global_flags.limiter_enabled);
+ set_final_makeup_gain_auto(global_flags.final_makeup_gain_auto);
+
+ // hlen=16 is pretty low quality, but we use quite a bit of CPU otherwise,
+ // and there's a limit to how important the peak meter is.
+ peak_resampler.setup(OUTPUT_FREQUENCY, OUTPUT_FREQUENCY * 4, /*num_channels=*/2, /*hlen=*/16, /*frel=*/1.0);
+
+ if (global_flags.enable_alsa_output) {
+ alsa.reset(new ALSAOutput(OUTPUT_FREQUENCY, /*num_channels=*/2));
+ }
+}
- GLuint vao;
- glGenVertexArrays(1, &vao);
- check_error();
+Mixer::~Mixer()
+{
+ resource_pool->release_glsl_program(cbcr_program_num);
+ glDeleteBuffers(1, &cbcr_vbo);
+ if (has_bmusb_thread) {
+ BMUSBCapture::stop_bm_thread();
+ }
- while (!quit) {
- ++frame;
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+ {
+ unique_lock<mutex> lock(bmusb_mutex);
+ cards[card_index].should_quit = true; // Unblock thread.
+ cards[card_index].new_frames_changed.notify_all();
+ }
+ cards[card_index].capture->stop_dequeue_thread();
+ }
- //int width0 = lrintf(848 * (1.0 + 0.2 * sin(frame * 0.02)));
- int width0 = 848;
- int height0 = lrintf(width0 * 9.0 / 16.0);
-
- //float top0 = 96 + 48 * sin(frame * 0.005);
- //float left0 = 96 + 48 * cos(frame * 0.006);
- float top0 = 48;
- float left0 = 16;
- float bottom0 = top0 + height0;
- float right0 = left0 + width0;
-
- int width1 = 384;
- int height1 = 216;
-
- float bottom1 = 720 - 48;
- float right1 = 1280 - 16;
- float top1 = bottom1 - height1;
- float left1 = right1 - width1;
-
- float t = 0.5 + 0.5 * cos(frame * 0.006);
- //float t = 0.0;
- float scale0 = 1.0 + t * (1280.0 / 848.0 - 1.0);
- float tx0 = 0.0 + t * (-16.0 * scale0);
- float ty0 = 0.0 + t * (-48.0 * scale0);
-
- top0 = top0 * scale0 + ty0;
- bottom0 = bottom0 * scale0 + ty0;
- left0 = left0 * scale0 + tx0;
- right0 = right0 * scale0 + tx0;
-
- top1 = top1 * scale0 + ty0;
- bottom1 = bottom1 * scale0 + ty0;
- left1 = left1 * scale0 + tx0;
- right1 = right1 * scale0 + tx0;
-
- place_rectangle(resample_effect, padding_effect, left0, top0, right0, bottom0);
- place_rectangle(resample2_effect, padding2_effect, left1, top1, right1, bottom1);
-
- CaptureCard card_copy[NUM_CARDS];
+ video_encoder.reset(nullptr);
+}
- {
- std::unique_lock<std::mutex> lock(bmusb_mutex);
-
- // The first card is the master timer, so wait for it to have a new frame.
- // TODO: Make configurable, and with a timeout.
- cards[0].new_data_ready_changed.wait(lock, []{ return cards[0].new_data_ready; });
-
- for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
- CaptureCard *card = &cards[card_index];
- card_copy[card_index].usb = card->usb;
- card_copy[card_index].new_data_ready = card->new_data_ready;
- card_copy[card_index].new_frame = card->new_frame;
- card_copy[card_index].new_data_ready_fence = card->new_data_ready_fence;
- card->new_data_ready = false;
- card->new_data_ready_changed.notify_all();
+void Mixer::configure_card(unsigned card_index, CaptureInterface *capture, bool is_fake_capture)
+{
+ printf("Configuring card %d...\n", card_index);
+
+ CaptureCard *card = &cards[card_index];
+ if (card->capture != nullptr) {
+ card->capture->stop_dequeue_thread();
+ delete card->capture;
+ }
+ card->capture = capture;
+ card->is_fake_capture = is_fake_capture;
+ card->capture->set_frame_callback(bind(&Mixer::bm_frame, this, card_index, _1, _2, _3, _4, _5, _6, _7));
+ if (card->frame_allocator == nullptr) {
+ card->frame_allocator.reset(new PBOFrameAllocator(8 << 20, WIDTH, 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);
+ }
+ {
+ unique_lock<mutex> lock(cards[card_index].audio_mutex);
+ card->resampling_queue.reset(new ResamplingQueue(card_index, OUTPUT_FREQUENCY, OUTPUT_FREQUENCY, 2));
+ }
+ while (!card->new_frames.empty()) card->new_frames.pop();
+ card->fractional_samples = 0;
+ card->last_timecode = -1;
+ card->next_local_pts = 0;
+ card->capture->configure_card();
+}
+
+
+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);
+ }
+}
+
+float find_peak(const float *samples, size_t num_samples)
+{
+ float m = fabs(samples[0]);
+ for (size_t i = 1; i < num_samples; ++i) {
+ m = max(m, fabs(samples[i]));
+ }
+ return m;
+}
+
+void deinterleave_samples(const vector<float> &in, vector<float> *out_l, vector<float> *out_r)
+{
+ size_t num_samples = in.size() / 2;
+ out_l->resize(num_samples);
+ out_r->resize(num_samples);
+
+ const float *inptr = in.data();
+ float *lptr = &(*out_l)[0];
+ float *rptr = &(*out_r)[0];
+ for (size_t i = 0; i < num_samples; ++i) {
+ *lptr++ = *inptr++;
+ *rptr++ = *inptr++;
+ }
+}
+
+} // 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)
+{
+ CaptureCard *card = &cards[card_index];
+
+ 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 = 0.5; // Should be enough time for the signal to stabilize.
+ timespec now;
+ clock_gettime(CLOCK_MONOTONIC, &now);
+ double sec_since_last_switch = (now.tv_sec - last_mode_scan_change[card_index].tv_sec) +
+ 1e-9 * (now.tv_nsec - last_mode_scan_change[card_index].tv_nsec);
+ 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;
}
}
+ }
- vector<FrameAllocator::Frame> input_frames_to_release;
-
- for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
- CaptureCard *card = &card_copy[card_index];
- if (!card->new_data_ready)
- continue;
+ int64_t frame_length = int64_t(TIMEBASE) * video_format.frame_rate_den / video_format.frame_rate_nom;
+ assert(frame_length > 0);
- // Now we're done with the previous frame, so we can definitely
- // release it when this is done rendering. (Actually, we could do
- // it one frame earlier, but before we have a new one, there's no
- // knowing when the current one is released.)
- input_frames_to_release.push_back(bmusb_current_rendering_frame[card_index]);
- bmusb_current_rendering_frame[card_index] = card->new_frame;
-
- // The new texture might still be uploaded,
- // tell the GPU to wait until it's there.
- if (card->new_data_ready_fence)
- glWaitSync(card->new_data_ready_fence, /*flags=*/0, GL_TIMEOUT_IGNORED);
- check_error();
- glDeleteSync(card->new_data_ready_fence);
- check_error();
- GLint input_tex_pbo = (GLint)(intptr_t)card->new_frame.userdata;
- input[card_index]->set_pixel_data(0, (unsigned char *)BUFFER_OFFSET((1280 * 750 * 2 + 44) / 2 + 1280 * 25 + 22), input_tex_pbo);
- input[card_index]->set_pixel_data(1, (unsigned char *)BUFFER_OFFSET(1280 * 25 + 22), input_tex_pbo);
-
- if (NUM_CARDS == 1) {
- // Set to the other one, too.
- input[1]->set_pixel_data(0, (unsigned char *)BUFFER_OFFSET((1280 * 750 * 2 + 44) / 2 + 1280 * 25 + 22), input_tex_pbo);
- input[1]->set_pixel_data(1, (unsigned char *)BUFFER_OFFSET(1280 * 25 + 22), input_tex_pbo);
- }
+ 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) {
+ printf("Card %d: Dropping frame with implausible audio length (len=%d, offset=%d) [timecode=0x%04x video_len=%d video_offset=%d video_format=%x)\n",
+ card_index, 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;
+ }
- GLuint y_tex, cbcr_tex;
- bool got_frame = h264_encoder.begin_frame(&y_tex, &cbcr_tex);
- assert(got_frame);
+ int64_t local_pts = card->next_local_pts;
+ int dropped_frames = 0;
+ if (card->last_timecode != -1) {
+ dropped_frames = unwrap_timecode(timecode, card->last_timecode) - card->last_timecode - 1;
+ }
- // Render chain.
- {
- GLuint ycbcr_fbo = resource_pool->create_fbo(y_tex, chroma_tex);
- chain.render_to_fbo(ycbcr_fbo, WIDTH, HEIGHT);
- resource_pool->release_fbo(ycbcr_fbo);
+ // Convert the audio to stereo fp32 and add it.
+ vector<float> audio;
+ audio.resize(num_samples * 2);
+ switch (audio_format.bits_per_sample) {
+ case 0:
+ assert(num_samples == 0);
+ break;
+ case 24:
+ convert_fixed24_to_fp32(&audio[0], 2, audio_frame.data + audio_offset, audio_format.num_channels, num_samples);
+ break;
+ case 32:
+ convert_fixed32_to_fp32(&audio[0], 2, audio_frame.data + audio_offset, audio_format.num_channels, num_samples);
+ break;
+ default:
+ fprintf(stderr, "Cannot handle audio with %u bits per sample\n", audio_format.bits_per_sample);
+ assert(false);
+ }
+
+ // Add the audio.
+ {
+ unique_lock<mutex> lock(card->audio_mutex);
+
+ // Number of samples per frame if we need to insert silence.
+ // (Could be nonintegral, but resampling will save us then.)
+ int silence_samples = OUTPUT_FREQUENCY * video_format.frame_rate_den / video_format.frame_rate_nom;
+
+ if (dropped_frames > MAX_FPS * 2) {
+ fprintf(stderr, "Card %d lost more than two seconds (or time code jumping around; from 0x%04x to 0x%04x), resetting resampler\n",
+ card_index, card->last_timecode, timecode);
+ card->resampling_queue.reset(new ResamplingQueue(card_index, OUTPUT_FREQUENCY, OUTPUT_FREQUENCY, 2));
+ dropped_frames = 0;
+ } 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);
+ vector<float> silence(silence_samples * 2, 0.0f);
+ for (int i = 0; i < dropped_frames; ++i) {
+ card->resampling_queue->add_input_samples(local_pts / double(TIMEBASE), silence.data(), silence_samples);
+ // 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.
+ local_pts += frame_length;
+ }
+ }
+ if (num_samples == 0) {
+ audio.resize(silence_samples * 2);
+ num_samples = silence_samples;
}
+ card->resampling_queue->add_input_samples(local_pts / double(TIMEBASE), audio.data(), num_samples);
+ card->next_local_pts = local_pts + frame_length;
+ }
- // Set up for extraction.
- float vertices[] = {
- 0.0f, 2.0f,
- 0.0f, 0.0f,
- 2.0f, 0.0f
- };
+ card->last_timecode = timecode;
- glBindVertexArray(vao);
- check_error();
+ // Done with the audio, so release it.
+ if (audio_frame.owner) {
+ audio_frame.owner->release_frame(audio_frame);
+ }
- // Extract Cb/Cr.
- GLuint cbcr_fbo = resource_pool->create_fbo(cbcr_tex);
- glBindFramebuffer(GL_FRAMEBUFFER, cbcr_fbo);
- glViewport(0, 0, WIDTH/2, HEIGHT/2);
- check_error();
- GLsync fence;
+ size_t expected_length = video_format.width * (video_format.height + video_format.extra_lines_top + video_format.extra_lines_bottom) * 2;
+ if (video_frame.len - video_offset == 0 ||
+ video_frame.len - video_offset != expected_length) {
+ if (video_frame.len != 0) {
+ printf("Card %d: Dropping video frame with wrong length (%ld; expected %ld)\n",
+ card_index, 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.
{
- glUseProgram(cbcr_program_num);
+ unique_lock<mutex> lock(bmusb_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;
+ card->new_frames.push(move(new_frame));
+ card->new_frames_changed.notify_all();
+ }
+ return;
+ }
+
+ PBOFrameAllocator::Userdata *userdata = (PBOFrameAllocator::Userdata *)video_frame.userdata;
+
+ unsigned num_fields = video_format.interlaced ? 2 : 1;
+ timespec frame_upload_start;
+ 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;
+ assert(frame_length % 2 == 0);
+ frame_length /= 2;
+ num_fields = 2;
+ clock_gettime(CLOCK_MONOTONIC, &frame_upload_start);
+ }
+ 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.
+ size_t cbcr_width = video_format.width / 2;
+ size_t cbcr_offset = video_offset / 2;
+ 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
+ // 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 = [field, video_format, y_offset, cbcr_offset, cbcr_width, userdata]() {
+ unsigned field_start_line = (field == 1) ? video_format.second_field_start : video_format.extra_lines_top + field * (video_format.height + 22);
+
+ if (userdata->tex_y[field] == 0 ||
+ userdata->tex_cbcr[field] == 0 ||
+ video_format.width != userdata->last_width[field] ||
+ video_format.height != userdata->last_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.
+ glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
+ check_error();
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, cbcr_width, video_format.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, video_format.width, video_format.height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
+ check_error();
+ userdata->last_width[field] = video_format.width;
+ userdata->last_height[field] = video_format.height;
+ }
+
+ GLuint pbo = userdata->pbo;
+ check_error();
+ glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo);
check_error();
- glActiveTexture(GL_TEXTURE0);
+ 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);
+
+ if (global_flags.flush_pbos) {
+ glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, field_y_start, video_format.width * video_format.height);
+ check_error();
+ glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, field_cbcr_start, cbcr_width * video_format.height * sizeof(uint16_t));
+ check_error();
+ }
+
+ glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
check_error();
- glBindTexture(GL_TEXTURE_2D, chroma_tex);
+ glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, cbcr_width, video_format.height, GL_RG, GL_UNSIGNED_BYTE, BUFFER_OFFSET(field_cbcr_start));
check_error();
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
check_error();
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, video_format.width, video_format.height, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET(field_y_start));
check_error();
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ glBindTexture(GL_TEXTURE_2D, 0);
check_error();
+ glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
+ check_error();
+ };
- float chroma_offset_0[] = { -0.5f / WIDTH, 0.0f };
- set_uniform_vec2(cbcr_program_num, "foo", "chroma_offset_0", chroma_offset_0);
+ 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.
+ timespec second_field_start;
+ second_field_start.tv_nsec = frame_upload_start.tv_nsec +
+ frame_length * 1000000000 / TIMEBASE;
+ second_field_start.tv_sec = frame_upload_start.tv_sec +
+ second_field_start.tv_nsec / 1000000000;
+ second_field_start.tv_nsec %= 1000000000;
+
+ while (clock_nanosleep(CLOCK_MONOTONIC, TIMER_ABSTIME,
+ &second_field_start, nullptr) == -1 &&
+ errno == EINTR) ;
+ }
- GLuint position_vbo = fill_vertex_attribute(cbcr_program_num, "position", 2, GL_FLOAT, sizeof(vertices), vertices);
- GLuint texcoord_vbo = fill_vertex_attribute(cbcr_program_num, "texcoord", 2, GL_FLOAT, sizeof(vertices), vertices); // Same as vertices.
+ {
+ unique_lock<mutex> lock(bmusb_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;
+ card->new_frames.push(move(new_frame));
+ card->new_frames_changed.notify_all();
+ }
+ }
+}
- glDrawArrays(GL_TRIANGLES, 0, 3);
- check_error();
+void Mixer::bm_hotplug_add(libusb_device *dev)
+{
+ lock_guard<mutex> lock(hotplug_mutex);
+ hotplugged_cards.push_back(dev);
+}
- cleanup_vertex_attribute(cbcr_program_num, "position", position_vbo);
- cleanup_vertex_attribute(cbcr_program_num, "texcoord", texcoord_vbo);
+void Mixer::bm_hotplug_remove(unsigned card_index)
+{
+ cards[card_index].new_frames_changed.notify_all();
+}
- glUseProgram(0);
- check_error();
+void Mixer::thread_func()
+{
+ eglBindAPI(EGL_OPENGL_API);
+ QOpenGLContext *context = create_context(mixer_surface);
+ if (!make_current(context, mixer_surface)) {
+ printf("oops\n");
+ exit(1);
+ }
- fence = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
- check_error();
+ struct timespec start, now;
+ clock_gettime(CLOCK_MONOTONIC, &start);
+
+ int frame = 0;
+ int stats_dropped_frames = 0;
+
+ while (!should_quit) {
+ CaptureCard::NewFrame new_frames[MAX_CARDS];
+ bool has_new_frame[MAX_CARDS] = { false };
+ int num_samples[MAX_CARDS] = { 0 };
+
+ unsigned master_card_index = theme->map_signal(master_clock_channel);
+ assert(master_card_index < num_cards);
- resource_pool->release_fbo(cbcr_fbo);
+ get_one_frame_from_each_card(master_card_index, new_frames, has_new_frame, num_samples);
+ schedule_audio_resampling_tasks(new_frames[master_card_index].dropped_frames, num_samples[master_card_index], new_frames[master_card_index].length);
+ stats_dropped_frames += new_frames[master_card_index].dropped_frames;
+ send_audio_level_callback();
+
+ handle_hotplugged_cards();
+
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+ 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("Card %u dropped %d frames before this\n",
+ card_index, int(new_frames[card_index].dropped_frames));
+ }
}
- h264_encoder.end_frame(fence, input_frames_to_release);
+ // If the first card is reporting a corrupted or otherwise dropped frame,
+ // just increase the pts (skipping over this frame) and don't try to compute anything new.
+ if (new_frames[master_card_index].frame->len == 0) {
+ ++stats_dropped_frames;
+ pts_int += new_frames[master_card_index].length;
+ continue;
+ }
+
+ for (unsigned card_index = 0; card_index < num_cards; ++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 duration = new_frames[master_card_index].length;
+ render_one_frame(duration);
+ ++frame;
+ pts_int += duration;
-#if 1
-#if _POSIX_C_SOURCE >= 199309L
clock_gettime(CLOCK_MONOTONIC, &now);
double elapsed = now.tv_sec - start.tv_sec +
1e-9 * (now.tv_nsec - start.tv_nsec);
-#else
- gettimeofday(&now, NULL);
- double elapsed = now.tv_sec - start.tv_sec +
- 1e-6 * (now.tv_usec - start.tv_usec);
-#endif
if (frame % 100 == 0) {
- printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
- frame, elapsed, frame / elapsed,
+ printf("%d frames (%d dropped) in %.3f seconds = %.1f fps (%.1f ms/frame)",
+ frame, stats_dropped_frames, elapsed, frame / elapsed,
1e3 * elapsed / frame);
- // chain.print_phase_timing();
+ // chain->print_phase_timing();
+
+ // Check our memory usage, to see if we are close to our mlockall()
+ // limit (if at all set).
+ rusage used;
+ if (getrusage(RUSAGE_SELF, &used) == -1) {
+ perror("getrusage(RUSAGE_SELF)");
+ assert(false);
+ }
+
+ if (uses_mlock) {
+ rlimit limit;
+ if (getrlimit(RLIMIT_MEMLOCK, &limit) == -1) {
+ perror("getrlimit(RLIMIT_MEMLOCK)");
+ assert(false);
+ }
+
+ printf(", using %ld / %ld MB lockable memory (%.1f%%)",
+ long(used.ru_maxrss / 1024),
+ long(limit.rlim_cur / 1048576),
+ float(100.0 * (used.ru_maxrss * 1024.0) / limit.rlim_cur));
+ } else {
+ printf(", using %ld MB memory (not locked)",
+ long(used.ru_maxrss / 1024));
+ }
+
+ printf("\n");
}
+
+ if (should_cut.exchange(false)) { // Test and clear.
+ video_encoder->do_cut(frame);
+ }
+
+#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
start = now;
}
#endif
+ check_error();
+ }
+
+ resource_pool->clean_context();
+}
+
+void Mixer::get_one_frame_from_each_card(unsigned master_card_index, CaptureCard::NewFrame new_frames[MAX_CARDS], bool has_new_frame[MAX_CARDS], int num_samples[MAX_CARDS])
+{
+start:
+ // The first card is the master timer, so wait for it to have a new frame.
+ // TODO: Add a timeout.
+ unique_lock<mutex> lock(bmusb_mutex);
+ cards[master_card_index].new_frames_changed.wait(lock, [this, master_card_index]{ return !cards[master_card_index].new_frames.empty() || cards[master_card_index].capture->get_disconnected(); });
+
+ 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();
+ goto start;
+ }
+
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+ CaptureCard *card = &cards[card_index];
+ if (card->new_frames.empty()) {
+ assert(card_index != master_card_index);
+ card->queue_length_policy.update_policy(-1);
+ continue;
+ }
+ new_frames[card_index] = move(card->new_frames.front());
+ has_new_frame[card_index] = true;
+ card->new_frames.pop();
+ card->new_frames_changed.notify_all();
+
+ int num_samples_times_timebase = OUTPUT_FREQUENCY * new_frames[card_index].length + card->fractional_samples;
+ num_samples[card_index] = num_samples_times_timebase / TIMEBASE;
+ card->fractional_samples = num_samples_times_timebase % TIMEBASE;
+ assert(num_samples[card_index] >= 0);
+
+ if (card_index == master_card_index) {
+ // We don't use the queue length policy for the master card,
+ // but we will if it stops being the master. Thus, clear out
+ // the policy in case we switch in the future.
+ card->queue_length_policy.reset(card_index);
+ } else {
+ // If we have excess frames compared to the policy for this card,
+ // drop frames from the head.
+ card->queue_length_policy.update_policy(card->new_frames.size());
+ while (card->new_frames.size() > card->queue_length_policy.get_safe_queue_length()) {
+ card->new_frames.pop();
+ }
+ }
+ }
+}
+
+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);
+ configure_card(card_index, new FakeCapture(card_index), /*is_fake_capture=*/true);
+ 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 = int(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, /*is_fake_capture=*/false);
+ 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)
+{
+ // 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) {
+ {
+ // Signal to the audio thread to process this frame.
+ unique_lock<mutex> lock(audio_mutex);
+ audio_task_queue.push(AudioTask{pts_int, num_samples_per_frame});
+ audio_task_queue_changed.notify_one();
+ }
+ if (frame_num != dropped_frames) {
+ // 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)
+{
+ // Get the main chain from the theme, and set its state immediately.
+ Theme::Chain theme_main_chain = theme->get_chain(0, pts(), WIDTH, HEIGHT, input_state);
+ EffectChain *chain = theme_main_chain.chain;
+ theme_main_chain.setup_chain();
+ //theme_main_chain.chain->enable_phase_timing(true);
+
+ GLuint y_tex, cbcr_tex;
+ bool got_frame = video_encoder->begin_frame(&y_tex, &cbcr_tex);
+ assert(got_frame);
+
+ // Render main chain.
+ GLuint cbcr_full_tex = resource_pool->create_2d_texture(GL_RG8, WIDTH, HEIGHT);
+ GLuint rgba_tex = resource_pool->create_2d_texture(GL_RGB565, WIDTH, HEIGHT); // Saves texture bandwidth, although dithering gets messed up.
+ GLuint fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex, rgba_tex);
+ check_error();
+ chain->render_to_fbo(fbo, WIDTH, HEIGHT);
+ resource_pool->release_fbo(fbo);
+
+ subsample_chroma(cbcr_full_tex, cbcr_tex);
+ resource_pool->release_2d_texture(cbcr_full_tex);
+
+ // Set the right state for rgba_tex.
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+ glBindTexture(GL_TEXTURE_2D, rgba_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);
+
+ const int64_t av_delay = TIMEBASE / 10; // Corresponds to the fixed delay in resampling_queue.h. TODO: Make less hard-coded.
+ RefCountedGLsync fence = video_encoder->end_frame(pts_int + av_delay, duration, theme_main_chain.input_frames);
+
+ // The live frame just shows the RGBA texture we just rendered.
+ // It owns rgba_tex now.
+ DisplayFrame live_frame;
+ live_frame.chain = display_chain.get();
+ live_frame.setup_chain = [this, rgba_tex]{
+ display_input->set_texture_num(rgba_tex);
+ };
+ live_frame.ready_fence = fence;
+ live_frame.input_frames = {};
+ live_frame.temp_textures = { rgba_tex };
+ output_channel[OUTPUT_LIVE].output_frame(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(), WIDTH, HEIGHT, input_state); // FIXME: dimensions
+ display_frame.chain = chain.chain;
+ display_frame.setup_chain = chain.setup_chain;
+ display_frame.ready_fence = fence;
+ display_frame.input_frames = chain.input_frames;
+ display_frame.temp_textures = {};
+ output_channel[i].output_frame(display_frame);
+ }
+}
+
+void Mixer::send_audio_level_callback()
+{
+ if (audio_level_callback == nullptr) {
+ return;
+ }
+
+ unique_lock<mutex> lock(compressor_mutex);
+ double loudness_s = r128.loudness_S();
+ double loudness_i = r128.integrated();
+ double loudness_range_low = r128.range_min();
+ double loudness_range_high = r128.range_max();
+
+ audio_level_callback(loudness_s, 20.0 * log10(peak),
+ loudness_i, loudness_range_low, loudness_range_high,
+ gain_staging_db, 20.0 * log10(final_makeup_gain),
+ correlation.get_correlation());
+}
+
+void Mixer::audio_thread_func()
+{
+ 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();
+ }
+
+ process_audio_one_frame(task.pts_int, task.num_samples);
+ }
+}
+
+void Mixer::process_audio_one_frame(int64_t frame_pts_int, int num_samples)
+{
+ vector<float> samples_card;
+ vector<float> samples_out;
+
+ // TODO: Allow mixing audio from several sources.
+ unsigned selected_audio_card = theme->map_signal(audio_source_channel);
+ assert(selected_audio_card < num_cards);
+
+ for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
+ samples_card.resize(num_samples * 2);
+ {
+ unique_lock<mutex> lock(cards[card_index].audio_mutex);
+ cards[card_index].resampling_queue->get_output_samples(double(frame_pts_int) / TIMEBASE, &samples_card[0], num_samples);
+ }
+ if (card_index == selected_audio_card) {
+ samples_out = move(samples_card);
+ }
+ }
+
+ // Cut away everything under 120 Hz (or whatever the cutoff is);
+ // we don't need it for voice, and it will reduce headroom
+ // and confuse the compressor. (In particular, any hums at 50 or 60 Hz
+ // should be dampened.)
+ if (locut_enabled) {
+ locut.render(samples_out.data(), samples_out.size() / 2, locut_cutoff_hz * 2.0 * M_PI / OUTPUT_FREQUENCY, 0.5f);
+ }
+
+ // Apply a level compressor to get the general level right.
+ // Basically, if it's over about -40 dBFS, we squeeze it down to that level
+ // (or more precisely, near it, since we don't use infinite ratio),
+ // then apply a makeup gain to get it to -14 dBFS. -14 dBFS is, of course,
+ // entirely arbitrary, but from practical tests with speech, it seems to
+ // put ut around -23 LUFS, so it's a reasonable starting point for later use.
+ {
+ unique_lock<mutex> lock(compressor_mutex);
+ if (level_compressor_enabled) {
+ float threshold = 0.01f; // -40 dBFS.
+ float ratio = 20.0f;
+ float attack_time = 0.5f;
+ float release_time = 20.0f;
+ float makeup_gain = pow(10.0f, (ref_level_dbfs - (-40.0f)) / 20.0f); // +26 dB.
+ level_compressor.process(samples_out.data(), samples_out.size() / 2, threshold, ratio, attack_time, release_time, makeup_gain);
+ gain_staging_db = 20.0 * log10(level_compressor.get_attenuation() * makeup_gain);
+ } else {
+ // Just apply the gain we already had.
+ float g = pow(10.0f, gain_staging_db / 20.0f);
+ for (size_t i = 0; i < samples_out.size(); ++i) {
+ samples_out[i] *= g;
+ }
+ }
+ }
+
+#if 0
+ printf("level=%f (%+5.2f dBFS) attenuation=%f (%+5.2f dB) end_result=%+5.2f dB\n",
+ level_compressor.get_level(), 20.0 * log10(level_compressor.get_level()),
+ level_compressor.get_attenuation(), 20.0 * log10(level_compressor.get_attenuation()),
+ 20.0 * log10(level_compressor.get_level() * level_compressor.get_attenuation() * makeup_gain));
+#endif
+
+// float limiter_att, compressor_att;
+
+ // The real compressor.
+ if (compressor_enabled) {
+ float threshold = pow(10.0f, compressor_threshold_dbfs / 20.0f);
+ float ratio = 20.0f;
+ float attack_time = 0.005f;
+ float release_time = 0.040f;
+ float makeup_gain = 2.0f; // +6 dB.
+ compressor.process(samples_out.data(), samples_out.size() / 2, threshold, ratio, attack_time, release_time, makeup_gain);
+// compressor_att = compressor.get_attenuation();
+ }
+
+ // Finally a limiter at -4 dB (so, -10 dBFS) to take out the worst peaks only.
+ // Note that since ratio is not infinite, we could go slightly higher than this.
+ if (limiter_enabled) {
+ float threshold = pow(10.0f, limiter_threshold_dbfs / 20.0f);
+ float ratio = 30.0f;
+ float attack_time = 0.0f; // Instant.
+ float release_time = 0.020f;
+ float makeup_gain = 1.0f; // 0 dB.
+ limiter.process(samples_out.data(), samples_out.size() / 2, threshold, ratio, attack_time, release_time, makeup_gain);
+// limiter_att = limiter.get_attenuation();
+ }
+
+// printf("limiter=%+5.1f compressor=%+5.1f\n", 20.0*log10(limiter_att), 20.0*log10(compressor_att));
+
+ // Upsample 4x to find interpolated peak.
+ peak_resampler.inp_data = samples_out.data();
+ peak_resampler.inp_count = samples_out.size() / 2;
+
+ vector<float> interpolated_samples_out;
+ interpolated_samples_out.resize(samples_out.size());
+ while (peak_resampler.inp_count > 0) { // About four iterations.
+ peak_resampler.out_data = &interpolated_samples_out[0];
+ peak_resampler.out_count = interpolated_samples_out.size() / 2;
+ peak_resampler.process();
+ size_t out_stereo_samples = interpolated_samples_out.size() / 2 - peak_resampler.out_count;
+ peak = max<float>(peak, find_peak(interpolated_samples_out.data(), out_stereo_samples * 2));
+ peak_resampler.out_data = nullptr;
+ }
+
+ // At this point, we are most likely close to +0 LU, but all of our
+ // measurements have been on raw sample values, not R128 values.
+ // So we have a final makeup gain to get us to +0 LU; the gain
+ // adjustments required should be relatively small, and also, the
+ // offset shouldn't change much (only if the type of audio changes
+ // significantly). Thus, we shoot for updating this value basically
+ // “whenever we process buffers”, since the R128 calculation isn't exactly
+ // something we get out per-sample.
+ //
+ // Note that there's a feedback loop here, so we choose a very slow filter
+ // (half-time of 100 seconds).
+ double target_loudness_factor, alpha;
+ {
+ unique_lock<mutex> lock(compressor_mutex);
+ double loudness_lu = r128.loudness_M() - ref_level_lufs;
+ double current_makeup_lu = 20.0f * log10(final_makeup_gain);
+ target_loudness_factor = pow(10.0f, -loudness_lu / 20.0f);
+
+ // If we're outside +/- 5 LU uncorrected, we don't count it as
+ // a normal signal (probably silence) and don't change the
+ // correction factor; just apply what we already have.
+ if (fabs(loudness_lu - current_makeup_lu) >= 5.0 || !final_makeup_gain_auto) {
+ alpha = 0.0;
+ } else {
+ // Formula adapted from
+ // https://en.wikipedia.org/wiki/Low-pass_filter#Simple_infinite_impulse_response_filter.
+ const double half_time_s = 100.0;
+ const double fc_mul_2pi_delta_t = 1.0 / (half_time_s * OUTPUT_FREQUENCY);
+ alpha = fc_mul_2pi_delta_t / (fc_mul_2pi_delta_t + 1.0);
+ }
+
+ double m = final_makeup_gain;
+ for (size_t i = 0; i < samples_out.size(); i += 2) {
+ samples_out[i + 0] *= m;
+ samples_out[i + 1] *= m;
+ m += (target_loudness_factor - m) * alpha;
+ }
+ final_makeup_gain = m;
+ }
+
+ // Find R128 levels and L/R correlation.
+ vector<float> left, right;
+ deinterleave_samples(samples_out, &left, &right);
+ float *ptrs[] = { left.data(), right.data() };
+ {
+ unique_lock<mutex> lock(compressor_mutex);
+ r128.process(left.size(), ptrs);
+ correlation.process_samples(samples_out);
+ }
+
+ // Send the samples to the sound card.
+ if (alsa) {
+ alsa->write(samples_out);
+ }
+
+ // And finally add them to the output.
+ video_encoder->add_audio(frame_pts_int, move(samples_out));
+}
+
+void Mixer::subsample_chroma(GLuint src_tex, GLuint dst_tex)
+{
+ GLuint vao;
+ glGenVertexArrays(1, &vao);
+ check_error();
+
+ glBindVertexArray(vao);
+ check_error();
+
+ // Extract Cb/Cr.
+ GLuint fbo = resource_pool->create_fbo(dst_tex);
+ glBindFramebuffer(GL_FRAMEBUFFER, fbo);
+ glViewport(0, 0, WIDTH/2, HEIGHT/2);
+ check_error();
+
+ glUseProgram(cbcr_program_num);
+ check_error();
+
+ glActiveTexture(GL_TEXTURE0);
+ check_error();
+ glBindTexture(GL_TEXTURE_2D, src_tex);
+ check_error();
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ check_error();
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ check_error();
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ check_error();
+
+ float chroma_offset_0[] = { -0.5f / WIDTH, 0.0f };
+ set_uniform_vec2(cbcr_program_num, "foo", "chroma_offset_0", chroma_offset_0);
+
+ glBindBuffer(GL_ARRAY_BUFFER, cbcr_vbo);
+ check_error();
+
+ for (GLint attr_index : { cbcr_position_attribute_index, cbcr_texcoord_attribute_index }) {
+ glEnableVertexAttribArray(attr_index);
+ check_error();
+ glVertexAttribPointer(attr_index, 2, GL_FLOAT, GL_FALSE, 0, BUFFER_OFFSET(0));
+ check_error();
}
+
+ glDrawArrays(GL_TRIANGLES, 0, 3);
+ check_error();
+
+ for (GLint attr_index : { cbcr_position_attribute_index, cbcr_texcoord_attribute_index }) {
+ glDisableVertexAttribArray(attr_index);
+ check_error();
+ }
+
+ glUseProgram(0);
+ check_error();
+ glBindFramebuffer(GL_FRAMEBUFFER, 0);
+ check_error();
+
+ resource_pool->release_fbo(fbo);
glDeleteVertexArrays(1, &vao);
- resource_pool->release_glsl_program(cbcr_program_num);
- resource_pool->release_2d_texture(chroma_tex);
- BMUSBCapture::stop_bm_thread();
}
-std::thread mixer_thread;
+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 start_mixer(QSurface *surface, QSurface *surface2, QSurface *surface3, QSurface *surface4)
+void Mixer::start()
{
- mixer_thread = std::thread([surface, surface2, surface3, surface4]{
- mixer_thread_func(surface, surface2, surface3, surface4);
- });
+ mixer_thread = thread(&Mixer::thread_func, this);
+ audio_thread = thread(&Mixer::audio_thread_func, this);
}
-void mixer_quit()
+void Mixer::quit()
{
- quit = true;
+ 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);
+}
+
+void Mixer::reset_meters()
+{
+ peak_resampler.reset();
+ peak = 0.0f;
+ r128.reset();
+ r128.integr_start();
+ correlation.reset();
+}
+
+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]);
+ clock_gettime(CLOCK_MONOTONIC, &last_mode_scan_change[card_index]);
+}
+
+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 = frame;
+ has_ready_frame = true;
+ }
+
+ if (new_frame_ready_callback) {
+ new_frame_ready_callback();
+ }
+
+ // 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 = 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::set_frame_ready_callback(Mixer::new_frame_ready_callback_t callback)
+{
+ new_frame_ready_callback = callback;
+}
+
+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;