-#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 <pthread.h>
+#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
-#include <sys/time.h>
-#include <time.h>
-#include <mutex>
-#include <queue>
+#include <algorithm>
+#include <chrono>
#include <condition_variable>
-
-#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 <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"
+#include "chroma_subsampler.h"
#include "context.h"
-#include "bmusb.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 "mixer.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;
-static float t = 0.0f;
+Mixer *global_mixer = nullptr;
-ResourcePool *resource_pool;
+namespace {
-std::mutex display_frame_mutex;
-DisplayFrame current_display_frame, ready_display_frame; // protected by <frame_mutex>
-bool has_current_display_frame = false, has_ready_display_frame = false; // protected by <frame_mutex>
-
-std::mutex bmusb_mutex;
-struct CaptureCard {
- BMUSBCapture *usb;
-
- // 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]; // protected by <bmusb_mutex>
+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);
+ }
-new_frame_ready_callback_t new_frame_ready_callback;
-bool has_new_frame_ready_callback = 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;
+ }
+ 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 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 upload_texture(GLuint tex, GLuint width, GLuint height, GLuint stride, bool interlaced_stride, GLenum format, GLenum type, GLintptr offset)
{
- 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);
- return;
+ if (interlaced_stride) {
+ stride *= 2;
}
- {
- // 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; });
+ if (global_flags.flush_pbos) {
+ glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, offset, stride * height);
+ check_error();
}
- GLuint pbo = (GLint)(intptr_t)video_frame.userdata;
+
+ glBindTexture(GL_TEXTURE_2D, tex);
check_error();
- glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, pbo);
+ 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();
- glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, video_frame.size);
+ glBindTexture(GL_TEXTURE_2D, 0);
check_error();
- //glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
- //check_error();
- GLsync fence = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, 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);
+} // 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)),
+ audio_mixer(num_cards)
+{
+ memcpy(ycbcr_interpretation, global_flags.ycbcr_interpretation, sizeof(ycbcr_interpretation));
CHECK(init_movit(MOVIT_SHADER_DIR, MOVIT_DEBUG_OFF));
check_error();
- EffectChain chain(WIDTH, HEIGHT);
- 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 = 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.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));
+
+ httpd.add_endpoint("/channels", bind(&Mixer::get_channels_json, this));
+ 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)));
+ }
+
+ // Start listening for clients only once VideoEncoder has written its header, if any.
+ httpd.start(global_flags.http_port);
- 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);
-
- ycbcr_format.chroma_subsampling_x = 1;
-
- chain.add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
- 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();
-
- H264Encoder h264_encoder(surface2, WIDTH, HEIGHT, "test.mp4");
-
- 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();
-
- 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();
+ // 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");
+ }
}
- BMUSBCapture::start_bm_thread();
+ 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);
- for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
- cards[card_index].usb->start_bm_capture();
+ 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);
}
- 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 (num_fake_cards > 0) {
+ fprintf(stderr, "Initialized %u fake cards.\n", num_fake_cards);
+ }
- 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();
+ // Initialize all video inputs the theme asked for. Note that these are
+ // all put _after_ the regular cards, which stop at <num_cards> - 1.
+ std::vector<FFmpegCapture *> video_inputs = theme->get_video_inputs();
+ for (unsigned video_card_index = 0; video_card_index < video_inputs.size(); ++card_index, ++video_card_index) {
+ if (card_index >= MAX_VIDEO_CARDS) {
+ fprintf(stderr, "ERROR: Not enough card slots available for the videos the theme requested.\n");
+ exit(1);
+ }
+ configure_card(card_index, video_inputs[video_card_index], CardType::FFMPEG_INPUT, /*output=*/nullptr);
+ video_inputs[video_card_index]->set_card_index(card_index);
}
+ num_video_inputs = video_inputs.size();
- //chain.enable_phase_timing(true);
+ BMUSBCapture::set_card_connected_callback(bind(&Mixer::bm_hotplug_add, this, _1));
+ BMUSBCapture::start_bm_thread();
- // Set up stuff for NV12 conversion.
- resource_pool = chain.get_resource_pool();
- GLuint chroma_tex = resource_pool->create_2d_texture(GL_RG8, WIDTH, HEIGHT);
+ for (unsigned card_index = 0; card_index < num_cards + num_video_inputs; ++card_index) {
+ cards[card_index].queue_length_policy.reset(card_index);
+ }
- // Cb/Cr shader.
- string cbcr_vert_shader = read_file("vs-cbcr.130.vert");
- string cbcr_frag_shader =
- "#version 130 \n"
- "in vec2 tc0; \n"
- "uniform sampler2D cbcr_tex; \n"
- "void main() { \n"
- " gl_FragColor = texture2D(cbcr_tex, tc0); \n"
- "} \n";
- GLuint cbcr_program_num = resource_pool->compile_glsl_program(cbcr_vert_shader, cbcr_frag_shader);
+ chroma_subsampler.reset(new ChromaSubsampler(resource_pool.get()));
- GLuint vao;
- glGenVertexArrays(1, &vao);
- check_error();
+ 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);
+ }
+ }
- while (!quit) {
- ++frame;
-
- //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];
+ 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()
+{
+ BMUSBCapture::stop_bm_thread();
+
+ for (unsigned card_index = 0; card_index < num_cards + num_video_inputs; ++card_index) {
{
- 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();
- }
+ unique_lock<mutex> lock(card_mutex);
+ cards[card_index].should_quit = true; // Unblock thread.
+ cards[card_index].new_frames_changed.notify_all();
}
+ cards[card_index].capture->stop_dequeue_thread();
+ if (cards[card_index].output) {
+ cards[card_index].output->end_output();
+ cards[card_index].output.reset();
+ }
+ }
- 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;
+ video_encoder.reset(nullptr);
+}
- // 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);
+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->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 (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{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;
+ 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);
+ }
+}
+
+} // 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{InputSourceType::CAPTURE_CARD, card_index};
+ 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) {
+ 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);
+ int dropped_frames = 0;
+ if (card->last_timecode != -1) {
+ dropped_frames = unwrap_timecode(timecode, card->last_timecode) - card->last_timecode - 1;
+ }
- // Render chain.
- GLuint rgba_tex = resource_pool->create_2d_texture(GL_RGBA8, WIDTH, HEIGHT);
- GLuint ycbcr_fbo = resource_pool->create_fbo(y_tex, chroma_tex, rgba_tex);
- chain.render_to_fbo(ycbcr_fbo, WIDTH, HEIGHT);
- resource_pool->release_fbo(ycbcr_fbo);
+ // 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, "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);
+ audio_mixer.reset_resampler(device);
+ dropped_frames = 0;
+ ++card->metric_input_resets;
+ } else if (dropped_frames > 0) {
+ // Insert silence as needed.
+ fprintf(stderr, "Card %d dropped %d frame(s) (before timecode 0x%04x), inserting silence.\n",
+ card_index, dropped_frames, timecode);
+ card->metric_input_dropped_frames_error += dropped_frames;
+
+ bool success;
+ do {
+ success = audio_mixer.add_silence(device, silence_samples, dropped_frames, frame_length);
+ } while (!success);
+ }
- // Set up for extraction.
- float vertices[] = {
- 0.0f, 2.0f,
- 0.0f, 0.0f,
- 2.0f, 0.0f
+ 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("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.
+ {
+ 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();
};
- glBindVertexArray(vao);
- 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);
+ }
- // 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();
+ {
+ 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->new_frames_changed.notify_all();
+ }
+}
- glUseProgram(cbcr_program_num);
- check_error();
+void Mixer::bm_hotplug_add(libusb_device *dev)
+{
+ lock_guard<mutex> lock(hotplug_mutex);
+ hotplugged_cards.push_back(dev);
+}
- glActiveTexture(GL_TEXTURE0);
- check_error();
- glBindTexture(GL_TEXTURE_2D, chroma_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();
+void Mixer::bm_hotplug_remove(unsigned card_index)
+{
+ cards[card_index].new_frames_changed.notify_all();
+}
- float chroma_offset_0[] = { -0.5f / WIDTH, 0.0f };
- set_uniform_vec2(cbcr_program_num, "foo", "chroma_offset_0", chroma_offset_0);
+void Mixer::thread_func()
+{
+ pthread_setname_np(pthread_self(), "Mixer_OpenGL");
- 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.
+ eglBindAPI(EGL_OPENGL_API);
+ QOpenGLContext *context = create_context(mixer_surface);
+ if (!make_current(context, mixer_surface)) {
+ printf("oops\n");
+ exit(1);
+ }
- glDrawArrays(GL_TRIANGLES, 0, 3);
- check_error();
+ // 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; ++card_index) {
+ if (int(card_index) != output_card_index) {
+ cards[card_index].capture->start_bm_capture();
+ }
+ }
- RefCountedGLsync fence(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
- check_error();
+ BasicStats basic_stats(/*verbose=*/true);
+ int stats_dropped_frames = 0;
- cleanup_vertex_attribute(cbcr_program_num, "position", position_vbo);
- cleanup_vertex_attribute(cbcr_program_num, "texcoord", texcoord_vbo);
+ 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);
+ }
- glUseProgram(0);
- check_error();
+ 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);
+ }
- resource_pool->release_fbo(cbcr_fbo);
+ 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;
- h264_encoder.end_frame(fence, input_frames_to_release);
+ handle_hotplugged_cards();
- // Store this frame for display. Remove the ready frame if any
- // (it was seemingly never used).
- {
- std::unique_lock<std::mutex> lock(display_frame_mutex);
- if (has_ready_display_frame) {
- resource_pool->release_2d_texture(ready_display_frame.texnum);
- ready_display_frame.ready_fence.reset();
+ for (unsigned card_index = 0; card_index < num_cards + num_video_inputs; ++card_index) {
+ if (card_index == master_card_index || !has_new_frame[card_index]) {
+ continue;
+ }
+ 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));
}
- ready_display_frame.texnum = rgba_tex;
- ready_display_frame.ready_fence = fence;
- has_ready_display_frame = true;
}
- if (has_new_frame_ready_callback) {
- new_frame_ready_callback();
+ // 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;
}
-#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,
- 1e3 * elapsed / frame);
- // chain.print_phase_timing();
+ for (unsigned card_index = 0; card_index < num_cards + num_video_inputs; ++card_index) {
+ if (!has_new_frame[card_index] || new_frames[card_index].frame->len == 0)
+ continue;
+
+ 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);
+ ++frame_num;
+ 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
start = now;
}
#endif
+ check_error();
}
- glDeleteVertexArrays(1, &vao);
- resource_pool->release_glsl_program(cbcr_program_num);
- resource_pool->release_2d_texture(chroma_tex);
- BMUSBCapture::stop_bm_thread();
+
+ resource_pool->clean_context();
}
-bool mixer_get_display_frame(DisplayFrame *frame)
+bool Mixer::input_card_is_master_clock(unsigned card_index, unsigned master_card_index) const
{
- std::unique_lock<std::mutex> lock(display_frame_mutex);
- if (!has_current_display_frame && !has_ready_display_frame) {
+ 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 (has_current_display_frame && has_ready_display_frame) {
+ // 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;
+ }
+
+ 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; ++card_index) {
+ CaptureCard *card = &cards[card_index];
+ if (card->new_frames.empty()) { // Starvation.
+ ++card->metric_input_duped_frames;
+ } 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; ++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);
+
+ // The theme can't (or at least shouldn't!) call connect_signal() on
+ // each FFmpeg input, so we'll do it here.
+ for (const pair<LiveInputWrapper *, FFmpegCapture *> &conn : theme->get_signal_connections()) {
+ conn.first->connect_signal_raw(conn.second->get_card_index(), input_state);
+ }
+
+ // 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();
+}
+
+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.
- resource_pool->release_2d_texture(current_display_frame.texnum);
- current_display_frame.ready_fence.reset();
- has_current_display_frame = false;
+ parent->release_display_frame(¤t_frame);
+ has_current_frame = false;
}
- if (has_ready_display_frame) {
- assert(!has_current_display_frame);
- current_display_frame = ready_display_frame;
- ready_display_frame.ready_fence.reset(); // Drop the refcount.
- has_current_display_frame = true;
- has_ready_display_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_display_frame;
+ *frame = current_frame;
return true;
}
-void set_frame_ready_fallback(new_frame_ready_callback_t callback)
+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)
{
- new_frame_ready_callback = callback;
- has_new_frame_ready_callback = true;
+ unique_lock<mutex> lock(frame_mutex);
+ new_frame_ready_callbacks.erase(key);
}
-std::thread mixer_thread;
+void Mixer::OutputChannel::set_transition_names_updated_callback(Mixer::transition_names_updated_callback_t callback)
+{
+ transition_names_updated_callback = callback;
+}
-void start_mixer(QSurface *surface, QSurface *surface2, QSurface *surface3, QSurface *surface4)
+void Mixer::OutputChannel::set_name_updated_callback(Mixer::name_updated_callback_t callback)
{
- mixer_thread = std::thread([surface, surface2, surface3, surface4]{
- mixer_thread_func(surface, surface2, surface3, surface4);
- });
+ name_updated_callback = callback;
}
-void mixer_quit()
+void Mixer::OutputChannel::set_color_updated_callback(Mixer::color_updated_callback_t callback)
{
- quit = true;
- mixer_thread.join();
+ color_updated_callback = callback;
}
+
+mutex RefCountedGLsync::fence_lock;