-#define EXTRAHEIGHT 30
-
#undef Success
#include "mixer.h"
#include <assert.h>
#include <epoxy/egl.h>
-#include <init.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 <util.h>
#include <algorithm>
#include <cmath>
#include <condition_variable>
#include <thread>
#include <utility>
#include <vector>
+#include <arpa/inet.h>
#include "bmusb/bmusb.h"
#include "context.h"
+#include "decklink_capture.h"
#include "defs.h"
+#include "flags.h"
#include "h264encode.h"
#include "pbo_frame_allocator.h"
#include "ref_counted_gl_sync.h"
}
}
+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 };
+ }
+ }
+}
+
+string generate_local_dump_filename(int frame)
+{
+ time_t now = time(NULL);
+ tm now_tm;
+ localtime_r(&now, &now_tm);
+
+ char timestamp[256];
+ strftime(timestamp, sizeof(timestamp), "%F-%T%z", &now_tm);
+
+ // Use the frame number to disambiguate between two cuts starting
+ // on the same second.
+ char filename[256];
+ snprintf(filename, sizeof(filename), "%s%s-f%02d%s",
+ LOCAL_DUMP_PREFIX, timestamp, frame % 100, LOCAL_DUMP_SUFFIX);
+ return filename;
+}
+
} // namespace
Mixer::Mixer(const QSurfaceFormat &format, unsigned num_cards)
- : httpd(LOCAL_DUMP_FILE_NAME, WIDTH, HEIGHT),
+ : httpd(WIDTH, HEIGHT),
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)
{
+ httpd.open_output_file(generate_local_dump_filename(/*frame=*/0).c_str());
httpd.start(9095);
CHECK(init_movit(MOVIT_SHADER_DIR, MOVIT_DEBUG_OFF));
display_chain->set_dither_bits(0); // Don't bother.
display_chain->finalize();
- h264_encoder.reset(new H264Encoder(h264_encoder_surface, WIDTH, HEIGHT, &httpd));
+ h264_encoder.reset(new H264Encoder(h264_encoder_surface, global_flags.va_display, WIDTH, HEIGHT, &httpd));
- for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
- printf("Configuring card %d...\n", card_index);
- CaptureCard *card = &cards[card_index];
- card->usb = new BMUSBCapture(card_index);
- card->usb->set_frame_callback(bind(&Mixer::bm_frame, this, card_index, _1, _2, _3, _4, _5, _6, _7));
- card->frame_allocator.reset(new PBOFrameAllocator(WIDTH * (HEIGHT+EXTRAHEIGHT) * 2 + 44 + 1, WIDTH, HEIGHT));
- card->usb->set_video_frame_allocator(card->frame_allocator.get());
- card->surface = create_surface(format);
- card->usb->set_dequeue_thread_callbacks(
- [card]{
- eglBindAPI(EGL_OPENGL_API);
- card->context = create_context(card->surface);
- if (!make_current(card->context, card->surface)) {
- printf("failed to create bmusb context\n");
- exit(1);
- }
- },
- [this]{
- resource_pool->clean_context();
- });
- card->resampling_queue.reset(new ResamplingQueue(OUTPUT_FREQUENCY, OUTPUT_FREQUENCY, 2));
- card->usb->configure_card();
- }
-
- BMUSBCapture::start_bm_thread();
+ // First try initializing the 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;
- for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
- cards[card_index].usb->start_bm_capture();
+ 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, format, new DeckLinkCapture(decklink, card_index));
+ ++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) {
+ configure_card(card_index, format, new BMUSBCapture(card_index - num_pci_devices));
+ ++num_usb_devices;
+ }
+
+ if (num_usb_devices > 0) {
+ BMUSBCapture::start_bm_thread();
}
- //chain->enable_phase_timing(true);
+ for (card_index = 0; card_index < num_cards; ++card_index) {
+ cards[card_index].capture->start_bm_capture();
+ }
// Set up stuff for NV12 conversion.
// 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";
- 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();
// 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);
+ peak_resampler.setup(OUTPUT_FREQUENCY, OUTPUT_FREQUENCY * 4, /*num_channels=*/2, /*hlen=*/16, /*frel=*/1.0);
alsa.reset(new ALSAOutput(OUTPUT_FREQUENCY, /*num_channels=*/2));
}
Mixer::~Mixer()
{
resource_pool->release_glsl_program(cbcr_program_num);
+ glDeleteBuffers(1, &cbcr_vbo);
BMUSBCapture::stop_bm_thread();
for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
cards[card_index].should_quit = true; // Unblock thread.
cards[card_index].new_data_ready_changed.notify_all();
}
- cards[card_index].usb->stop_dequeue_thread();
+ cards[card_index].capture->stop_dequeue_thread();
}
h264_encoder.reset(nullptr);
}
+void Mixer::configure_card(unsigned card_index, const QSurfaceFormat &format, CaptureInterface *capture)
+{
+ printf("Configuring card %d...\n", card_index);
+
+ CaptureCard *card = &cards[card_index];
+ card->capture = capture;
+ card->capture->set_frame_callback(bind(&Mixer::bm_frame, this, card_index, _1, _2, _3, _4, _5, _6, _7));
+ card->frame_allocator.reset(new PBOFrameAllocator(8 << 20, WIDTH, HEIGHT)); // 8 MB.
+ card->capture->set_video_frame_allocator(card->frame_allocator.get());
+ card->surface = create_surface(format);
+ card->capture->set_dequeue_thread_callbacks(
+ [card]{
+ eglBindAPI(EGL_OPENGL_API);
+ card->context = create_context(card->surface);
+ if (!make_current(card->context, card->surface)) {
+ printf("failed to create bmusb context\n");
+ exit(1);
+ }
+ },
+ [this]{
+ resource_pool->clean_context();
+ });
+ card->resampling_queue.reset(new ResamplingQueue(OUTPUT_FREQUENCY, OUTPUT_FREQUENCY, 2));
+ card->capture->configure_card();
+}
+
+
namespace {
int unwrap_timecode(uint16_t current_wrapped, int last)
{
float m = fabs(samples[0]);
for (size_t i = 1; i < num_samples; ++i) {
- m = std::max(m, fabs(samples[i]));
+ m = max(m, fabs(samples[i]));
}
return m;
}
}
}
-// Returns length of a frame with the given format, in TIMEBASE units.
-int64_t find_frame_length(uint16_t video_format)
-{
- if (video_format == 0x0800) {
- // No video signal. These green pseudo-frames seem to come at about 30.13 Hz.
- // It's a strange thing, but what can you do.
- return TIMEBASE * 100 / 3013;
- }
- if ((video_format & 0xe800) != 0xe800) {
- printf("Video format 0x%04x does not appear to be a video format. Assuming 60 Hz.\n",
- video_format);
- return TIMEBASE / 60;
- }
-
- // 0x8 seems to be a flag about availability of deep color on the input,
- // except when it's not (e.g. it's the only difference between NTSC 23.98
- // and PAL). Rather confusing. But we clear it here nevertheless, because
- // usually it doesn't mean anything.
- //
- // We don't really handle interlaced formats at all yet.
- uint16_t normalized_video_format = video_format & ~0xe808;
- if (normalized_video_format == 0x0143) { // 720p50.
- return TIMEBASE / 50;
- } else if (normalized_video_format == 0x0103) { // 720p60.
- return TIMEBASE / 60;
- } else if (normalized_video_format == 0x0121) { // 720p59.94.
- return TIMEBASE * 1001 / 60000;
- } else if (normalized_video_format == 0x01c3 || // 1080p30.
- normalized_video_format == 0x0003) { // 1080i60.
- return TIMEBASE / 30;
- } else if (normalized_video_format == 0x01e1 || // 1080p29.97.
- normalized_video_format == 0x0021 || // 1080i59.94.
- video_format == 0xe901 || // NTSC (480i59.94, I suppose).
- video_format == 0xe9c1 || // Ditto.
- video_format == 0xe801) { // Ditto.
- return TIMEBASE * 1001 / 30000;
- } else if (normalized_video_format == 0x0063 || // 1080p25.
- normalized_video_format == 0x0043 || // 1080i50.
- video_format == 0xe909) { // PAL (576i50, I suppose).
- return TIMEBASE / 25;
- } else if (normalized_video_format == 0x008e) { // 1080p24.
- return TIMEBASE / 24;
- } else if (normalized_video_format == 0x00a1) { // 1080p23.98.
- return TIMEBASE * 1001 / 24000;
- return TIMEBASE / 25;
- } else {
- printf("Unknown video format 0x%04x. Assuming 60 Hz.\n", video_format);
- return TIMEBASE / 60;
- }
-}
-
} // namespace
void Mixer::bm_frame(unsigned card_index, uint16_t timecode,
- FrameAllocator::Frame video_frame, size_t video_offset, uint16_t video_format,
+ FrameAllocator::Frame video_frame, size_t video_offset, VideoFormat video_format,
FrameAllocator::Frame audio_frame, size_t audio_offset, uint16_t audio_format)
{
CaptureCard *card = &cards[card_index];
- int64_t frame_length = find_frame_length(video_format);
+ int64_t frame_length = int64_t(TIMEBASE * video_format.frame_rate_den) / video_format.frame_rate_nom;
size_t num_samples = (audio_frame.len >= audio_offset) ? (audio_frame.len - audio_offset) / 8 / 3 : 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);
+ timecode, int(video_frame.len), int(video_offset), video_format.id);
if (video_frame.owner) {
video_frame.owner->release_frame(video_frame);
}
if (card->last_timecode != -1) {
dropped_frames = unwrap_timecode(timecode, card->last_timecode) - card->last_timecode - 1;
}
- card->last_timecode = timecode;
// Convert the audio to stereo fp32 and add it.
vector<float> 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), resetting resampler\n",
- card_index);
+ 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(OUTPUT_FREQUENCY, OUTPUT_FREQUENCY, 2));
+ dropped_frames = 0;
} else if (dropped_frames > 0) {
- // Insert silence as needed. (The number of samples could be nonintegral,
- // but resampling will save us then.)
+ // 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.resize((OUTPUT_FREQUENCY * frame_length / TIMEBASE) * 2);
+ 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.size() / 2);
+ 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;
}
+ card->last_timecode = timecode;
+
// Done with the audio, so release it.
if (audio_frame.owner) {
audio_frame.owner->release_frame(audio_frame);
if (card->should_quit) return;
}
- if (video_frame.len - video_offset != WIDTH * (HEIGHT+EXTRAHEIGHT) * 2) {
+ 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)\n",
- card_index, video_frame.len - video_offset);
+ 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);
card->new_data_ready = true;
card->new_frame = RefCountedFrame(FrameAllocator::Frame());
card->new_frame_length = frame_length;
+ card->new_frame_interlaced = false;
card->new_data_ready_fence = nullptr;
card->dropped_frames = dropped_frames;
card->new_data_ready_changed.notify_all();
return;
}
- const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)video_frame.userdata;
- GLuint pbo = userdata->pbo;
- 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();
+ 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_frame_rate_nom = video_format.frame_rate_nom;
+ userdata->last_frame_rate_den = video_format.frame_rate_den;
+ RefCountedFrame new_frame(video_frame);
// Upload the textures.
- glBindTexture(GL_TEXTURE_2D, userdata->tex_y);
- check_error();
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, WIDTH, HEIGHT, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET((WIDTH * (HEIGHT+EXTRAHEIGHT) * 2 + 44) / 2 + WIDTH * 25 + 22));
- check_error();
- glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr);
- check_error();
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, WIDTH/2, HEIGHT, GL_RG, GL_UNSIGNED_BYTE, BUFFER_OFFSET(WIDTH * 25 + 22));
- check_error();
- glBindTexture(GL_TEXTURE_2D, 0);
- check_error();
- GLsync fence = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
- check_error();
- assert(fence != nullptr);
+ 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) {
+ 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;
+ }
- {
- unique_lock<mutex> lock(bmusb_mutex);
- card->new_data_ready = true;
- card->new_frame = RefCountedFrame(video_frame);
- card->new_frame_length = frame_length;
- card->new_data_ready_fence = fence;
- card->dropped_frames = dropped_frames;
- card->new_data_ready_changed.notify_all();
+ GLuint pbo = userdata->pbo;
+ check_error();
+ glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, pbo);
+ check_error();
+ glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
+ check_error();
+
+ glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
+ check_error();
+ glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, cbcr_width, video_format.height, GL_RG, GL_UNSIGNED_BYTE, BUFFER_OFFSET(cbcr_offset + cbcr_width * field_start_line * sizeof(uint16_t)));
+ check_error();
+ glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
+ check_error();
+ glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, video_format.width, video_format.height, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET(y_offset + video_format.width * field_start_line));
+ check_error();
+ glBindTexture(GL_TEXTURE_2D, 0);
+ check_error();
+ glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, 0);
+ check_error();
+ GLsync fence = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
+ check_error();
+ assert(fence != nullptr);
+
+ 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) ;
+ }
+
+ {
+ unique_lock<mutex> lock(bmusb_mutex);
+ card->new_data_ready = true;
+ card->new_frame = new_frame;
+ card->new_frame_length = frame_length;
+ card->new_frame_field = field;
+ card->new_frame_interlaced = video_format.interlaced;
+ card->new_data_ready_fence = fence;
+ card->dropped_frames = dropped_frames;
+ card->new_data_ready_changed.notify_all();
+
+ if (field != num_fields - 1) {
+ // Wait until the previous frame was consumed.
+ card->new_data_ready_changed.wait(lock, [card]{ return !card->new_data_ready || card->should_quit; });
+ if (card->should_quit) return;
+ }
+ }
}
}
clock_gettime(CLOCK_MONOTONIC, &start);
int frame = 0;
- int dropped_frames = 0;
+ int stats_dropped_frames = 0;
while (!should_quit) {
CaptureCard card_copy[MAX_CARDS];
for (unsigned 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_frame_length = card->new_frame_length;
+ card_copy[card_index].new_frame_field = card->new_frame_field;
+ card_copy[card_index].new_frame_interlaced = card->new_frame_interlaced;
card_copy[card_index].new_data_ready_fence = card->new_data_ready_fence;
card_copy[card_index].dropped_frames = card->dropped_frames;
card->new_data_ready = false;
int num_samples_times_timebase = OUTPUT_FREQUENCY * card->new_frame_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);
}
}
// Resample the audio as needed, including from previously dropped frames.
+ assert(num_cards > 0);
for (unsigned frame_num = 0; frame_num < card_copy[0].dropped_frames + 1; ++frame_num) {
{
// Signal to the audio thread to process this 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.
- ++dropped_frames;
+ ++stats_dropped_frames;
pts_int += card_copy[0].new_frame_length;
}
}
if (audio_level_callback != nullptr) {
+ unique_lock<mutex> lock(compressor_mutex);
double loudness_s = r128.loudness_S();
double loudness_i = r128.integrated();
double loudness_range_low = r128.range_min();
audio_level_callback(loudness_s, 20.0 * log10(peak),
loudness_i, loudness_range_low, loudness_range_high,
- last_gain_staging_db);
+ gain_staging_db, 20.0 * log10(final_makeup_gain),
+ correlation.get_correlation());
}
for (unsigned card_index = 1; card_index < num_cards; ++card_index) {
// 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 (card_copy[0].new_frame->len == 0) {
- ++dropped_frames;
+ ++stats_dropped_frames;
pts_int += card_copy[0].new_frame_length;
continue;
}
continue;
assert(card->new_frame != nullptr);
- bmusb_current_rendering_frame[card_index] = card->new_frame;
+ insert_new_frame(card->new_frame, card->new_frame_field, card->new_frame_interlaced, card_index, &input_state);
check_error();
// The new texture might still be uploaded,
glDeleteSync(card->new_data_ready_fence);
check_error();
}
- const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)card->new_frame->userdata;
- theme->set_input_textures(card_index, userdata->tex_y, userdata->tex_cbcr);
}
// Get the main chain from the theme, and set its state immediately.
- pair<EffectChain *, function<void()>> theme_main_chain = theme->get_chain(0, pts(), WIDTH, HEIGHT);
- EffectChain *chain = theme_main_chain.first;
- theme_main_chain.second();
+ 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 = h264_encoder->begin_frame(&y_tex, &cbcr_tex);
RefCountedGLsync fence(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
check_error();
- // Make sure the H.264 gets a reference to all the
- // input frames needed, so that they are not released back
- // until the rendering is done.
- vector<RefCountedFrame> input_frames;
- for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
- input_frames.push_back(bmusb_current_rendering_frame[card_index]);
- }
const int64_t av_delay = TIMEBASE / 10; // Corresponds to the fixed delay in resampling_queue.h. TODO: Make less hard-coded.
- h264_encoder->end_frame(fence, pts_int + av_delay, input_frames);
+ h264_encoder->end_frame(fence, pts_int + av_delay, theme_main_chain.input_frames);
++frame;
pts_int += card_copy[0].new_frame_length;
// Set up preview and any additional channels.
for (int i = 1; i < theme->get_num_channels() + 2; ++i) {
DisplayFrame display_frame;
- pair<EffectChain *, function<void()>> chain = theme->get_chain(i, pts(), WIDTH, HEIGHT); // FIXME: dimensions
- display_frame.chain = chain.first;
- display_frame.setup_chain = chain.second;
+ 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;
-
- // FIXME: possible to do better?
- for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
- display_frame.input_frames.push_back(bmusb_current_rendering_frame[card_index]);
- }
+ display_frame.input_frames = chain.input_frames;
display_frame.temp_textures = {};
output_channel[i].output_frame(display_frame);
}
1e-9 * (now.tv_nsec - start.tv_nsec);
if (frame % 100 == 0) {
printf("%d frames (%d dropped) in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
- frame, dropped_frames, elapsed, frame / elapsed,
+ frame, stats_dropped_frames, elapsed, frame / elapsed,
1e3 * elapsed / frame);
// chain->print_phase_timing();
}
+ if (should_cut.exchange(false)) { // Test and clear.
+ string filename = generate_local_dump_filename(frame);
+ printf("Starting new recording: %s\n", filename.c_str());
+ h264_encoder->shutdown();
+ httpd.close_output_file();
+ httpd.open_output_file(filename.c_str());
+ h264_encoder.reset(new H264Encoder(h264_encoder_surface, global_flags.va_display, WIDTH, HEIGHT, &httpd));
+ }
+
#if 0
// Reset every 100 frames, so that local variations in frame times
// (especially for the first few frames, when the shaders are
{
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);
{
printf("Card %d reported previous underrun.\n", card_index);
}
}
- // TODO: Allow using audio from the other card(s) as well.
- if (card_index == 0) {
+ if (card_index == selected_audio_card) {
samples_out = move(samples_card);
}
}
// 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.)
- locut.render(samples_out.data(), samples_out.size() / 2, locut_cutoff_hz * 2.0 * M_PI / OUTPUT_FREQUENCY, 0.5f);
+ 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
// 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.
- float ref_level_dbfs = -14.0f;
{
- 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);
- last_gain_staging_db = 20.0 * log10(level_compressor.get_attenuation() * makeup_gain);
+ 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
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;
}
- // Find R128 levels.
+ // 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() };
- r128.process(left.size(), ptrs);
+ {
+ 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) {
glGenVertexArrays(1, &vao);
check_error();
- float vertices[] = {
- 0.0f, 2.0f,
- 0.0f, 0.0f,
- 2.0f, 0.0f
- };
-
glBindVertexArray(vao);
check_error();
float chroma_offset_0[] = { -0.5f / WIDTH, 0.0f };
set_uniform_vec2(cbcr_program_num, "foo", "chroma_offset_0", chroma_offset_0);
- 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.
+ 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();
- cleanup_vertex_attribute(cbcr_program_num, "position", position_vbo);
- cleanup_vertex_attribute(cbcr_program_num, "texcoord", texcoord_vbo);
+ 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);
peak = 0.0f;
r128.reset();
r128.integr_start();
+ correlation.reset();
}
Mixer::OutputChannel::~OutputChannel()
projects / nageru / blobdiff