#include <thread>
#include <vector>
-#include "bmusb.h"
+#include "bmusb/bmusb.h"
#include "context.h"
#include "h264encode.h"
#include "pbo_frame_allocator.h"
#include "ref_counted_gl_sync.h"
+#include "timebase.h"
class QOpenGLContext;
printf("Configuring card %d...\n", card_index);
CaptureCard *card = &cards[card_index];
card->usb = new BMUSBCapture(0x1edb, card_index == 0 ? 0xbd3b : 0xbd4f);
- card->usb->set_frame_callback(std::bind(&Mixer::bm_frame, this, card_index, _1, _2, _3, _4, _5, _6, _7));
+ 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(1280 * 750 * 2 + 44, 1280, 720));
card->usb->set_video_frame_allocator(card->frame_allocator.get());
card->surface = create_surface(format);
[this]{
resource_pool->clean_context();
});
- card->resampler = new Resampler(48000.0, 48000.0, 2);
+ card->resampler.reset(new Resampler(48000.0, 48000.0, 2));
card->usb->configure_card();
}
BMUSBCapture::stop_bm_thread();
for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
- cards[card_index].new_data_ready = false; // Unblock thread.
- cards[card_index].new_data_ready_changed.notify_all();
+ {
+ unique_lock<mutex> lock(bmusb_mutex);
+ cards[card_index].should_quit = true; // Unblock thread.
+ cards[card_index].new_data_ready_changed.notify_all();
+ }
cards[card_index].usb->stop_dequeue_thread();
}
}
+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(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)
{
CaptureCard *card = &cards[card_index];
- if (video_frame.len - video_offset != 1280 * 750 * 2) {
- printf("dropping frame with wrong length (%ld)\n", video_frame.len - video_offset);
- FILE *fp = fopen("frame.raw", "wb");
- fwrite(video_frame.data, video_frame.len, 1, fp);
- fclose(fp);
- //exit(1);
- card->usb->get_video_frame_allocator()->release_frame(video_frame);
- card->usb->get_audio_frame_allocator()->release_frame(audio_frame);
+ if (audio_frame.len - audio_offset > 30000) {
+ 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);
+ if (video_frame.owner) {
+ video_frame.owner->release_frame(video_frame);
+ }
+ if (audio_frame.owner) {
+ audio_frame.owner->release_frame(audio_frame);
+ }
return;
}
+
+ // Convert the audio to stereo fp32 and add it.
+ size_t num_samples = (audio_frame.len - audio_offset) / 8 / 3;
+ vector<float> audio;
+ audio.resize(num_samples * 2);
+ convert_fixed24_to_fp32(&audio[0], 2, audio_frame.data + audio_offset, 8, num_samples);
+
+ int unwrapped_timecode = timecode;
+ int dropped_frames = 0;
+ if (card->last_timecode != -1) {
+ unwrapped_timecode = unwrap_timecode(unwrapped_timecode, card->last_timecode);
+ dropped_frames = unwrapped_timecode - card->last_timecode - 1;
+ }
+ card->last_timecode = unwrapped_timecode;
+
+ // Add the audio.
+ {
+ unique_lock<mutex> lock(card->audio_mutex);
+
+ int unwrapped_timecode = timecode;
+ if (dropped_frames > 60 * 2) {
+ fprintf(stderr, "Card %d lost more than two seconds (or time code jumping around), resetting resampler\n",
+ card_index);
+ card->resampler.reset(new Resampler(48000.0, 48000.0, 2));
+ } else if (dropped_frames > 0) {
+ // Insert silence as needed.
+ fprintf(stderr, "Card %d dropped %d frame(s) (before timecode 0x%04x), inserting silence.\n",
+ card_index, dropped_frames, timecode);
+ vector<float> silence;
+ silence.resize((48000 / 60) * 2);
+ for (int i = 0; i < dropped_frames; ++i) {
+ card->resampler->add_input_samples((unwrapped_timecode - dropped_frames + i) / 60.0, silence.data(), (48000 / 60));
+ }
+ }
+ card->resampler->add_input_samples(unwrapped_timecode / 60.0, audio.data(), num_samples);
+ }
+
+ // Done with the audio, so release it.
+ if (audio_frame.owner) {
+ audio_frame.owner->release_frame(audio_frame);
+ }
+
{
// 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; });
+ unique_lock<mutex> lock(bmusb_mutex);
+ card->new_data_ready_changed.wait(lock, [card]{ return !card->new_data_ready || card->should_quit; });
+ if (card->should_quit) return;
}
+
+ if (video_frame.len - video_offset != 1280 * 750 * 2) {
+ if (video_frame.len != 0) {
+ printf("Card %d: Dropping video frame with wrong length (%ld)\n",
+ card_index, video_frame.len - video_offset);
+ }
+ 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(bmusb_mutex);
+ card->new_data_ready = true;
+ card->new_frame = RefCountedFrame(FrameAllocator::Frame());
+ 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();
GLsync fence = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
check_error();
assert(fence != nullptr);
+
{
- std::unique_lock<std::mutex> lock(bmusb_mutex);
+ unique_lock<mutex> lock(bmusb_mutex);
card->new_data_ready = true;
card->new_frame = RefCountedFrame(video_frame);
card->new_data_ready_fence = fence;
+ card->dropped_frames = dropped_frames;
card->new_data_ready_changed.notify_all();
}
-
- // As a test of the resampler, send the data from card 0 through it and onto disk.
- // TODO: Send the audio on, and encode it through ffmpeg.
- if (card_index == 0) {
- size_t num_samples = (audio_frame.len - audio_offset) / 8 / 3;
- double pts = timecode / 60.0; // FIXME: Unwrap. And rebase.
- unique_ptr<float[]> samplesf(new float[num_samples * 2]);
- convert_fixed24_to_fp32(samplesf.get(), 2, audio_frame.data + audio_offset, 8, num_samples);
- card->resampler->add_input_samples(pts, samplesf.get(), num_samples);
-
- float samples_out[(48000 / 60) * 2];
- card->resampler->get_output_samples(pts, samples_out, 48000 / 60);
-
- static FILE *audiofp = nullptr;
- if (audiofp == nullptr) {
- audiofp = fopen("audio.raw", "wb");
- }
- fwrite(samples_out, sizeof(samples_out), 1, audiofp);
- //fwrite(samplesf.get(), num_samples * sizeof(float) * 2, 1, audiofp);
-
- if (audio_frame.len - audio_offset != 19200) {
- printf("%d: %d samples (%d bytes)\n", card_index, int(num_samples), int(audio_frame.len - audio_offset));
- }
- }
-
- // Video frame will be released when last user of card->new_frame goes out of scope.
- card->usb->get_audio_frame_allocator()->release_frame(audio_frame);
}
void Mixer::thread_func()
struct timespec start, now;
clock_gettime(CLOCK_MONOTONIC, &start);
- while (!should_quit) {
- ++frame;
+ int frame = 0;
+ int dropped_frames = 0;
+ while (!should_quit) {
CaptureCard card_copy[NUM_CARDS];
{
- std::unique_lock<std::mutex> lock(bmusb_mutex);
+ unique_lock<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.
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_copy[card_index].new_frame_audio = move(card->new_frame_audio);
+ card_copy[card_index].dropped_frames = card->dropped_frames;
card->new_data_ready = false;
card->new_data_ready_changed.notify_all();
}
}
+ // Resample the audio as needed, including from previously dropped frames.
+ vector<float> samples_out;
+ // TODO: Allow using audio from the other card(s) as well.
+ for (unsigned frame_num = 0; frame_num < card_copy[0].dropped_frames + 1; ++frame_num) {
+ for (unsigned card_index = 0; card_index < NUM_CARDS; ++card_index) {
+ samples_out.resize((48000 / 60) * 2);
+ {
+ unique_lock<mutex> lock(cards[card_index].audio_mutex);
+ if (!cards[card_index].resampler->get_output_samples(pts(), &samples_out[0], 48000 / 60)) {
+ printf("Card %d reported previous underrun.\n", card_index);
+ }
+ }
+ if (card_index == 0) {
+ h264_encoder->add_audio(pts_int, move(samples_out));
+ }
+ }
+ if (frame_num != card_copy[0].dropped_frames) {
+ // For dropped frames, increase the pts.
+ ++dropped_frames;
+ pts_int += TIMEBASE / 60;
+ }
+ }
+
+ // 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;
+ pts_int += TIMEBASE / 60;
+ continue;
+ }
+
for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
CaptureCard *card = &card_copy[card_index];
- if (!card->new_data_ready)
+ if (!card->new_data_ready || card->new_frame->len == 0)
continue;
assert(card->new_frame != nullptr);
// The new texture might still be uploaded,
// tell the GPU to wait until it's there.
- if (card->new_data_ready_fence)
+ 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();
+ check_error();
+ 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, frame / 60.0f, WIDTH, HEIGHT);
+ pair<EffectChain *, function<void()>> theme_main_chain = theme->get_chain(0, pts(), WIDTH, HEIGHT);
EffectChain *chain = theme_main_chain.first;
theme_main_chain.second();
for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
input_frames.push_back(bmusb_current_rendering_frame[card_index]);
}
- h264_encoder->end_frame(fence, input_frames);
+ h264_encoder->end_frame(fence, pts_int, input_frames);
+ ++frame;
+ pts_int += TIMEBASE / 60;
// The live frame just shows the RGBA texture we just rendered.
// It owns rgba_tex now.
// 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, frame / 60.0f, WIDTH, HEIGHT); // FIXME: dimensions
+ 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;
display_frame.ready_fence = fence;
double elapsed = now.tv_sec - start.tv_sec +
1e-9 * (now.tv_nsec - start.tv_nsec);
if (frame % 100 == 0) {
- printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
- frame, elapsed, frame / elapsed,
+ printf("%d frames (%d dropped) in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
+ frame, dropped_frames, elapsed, frame / elapsed,
1e3 * elapsed / frame);
// chain->print_phase_timing();
}
+#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
frame = 0;
start = now;
}
+#endif
check_error();
}
void Mixer::start()
{
- mixer_thread = std::thread(&Mixer::thread_func, this);
+ mixer_thread = thread(&Mixer::thread_func, this);
}
void Mixer::quit()
void Mixer::transition_clicked(int transition_num)
{
- theme->transition_clicked(transition_num, frame / 60.0);
+ theme->transition_clicked(transition_num, pts());
}
void Mixer::channel_clicked(int preview_num)
// Store this frame for display. Remove the ready frame if any
// (it was seemingly never used).
{
- std::unique_lock<std::mutex> lock(frame_mutex);
+ unique_lock<mutex> lock(frame_mutex);
if (has_ready_frame) {
parent->release_display_frame(&ready_frame);
}
bool Mixer::OutputChannel::get_display_frame(DisplayFrame *frame)
{
- std::unique_lock<std::mutex> lock(frame_mutex);
+ unique_lock<mutex> lock(frame_mutex);
if (!has_current_frame && !has_ready_frame) {
return false;
}
projects / nageru / blobdiff