#include "ref_counted_gl_sync.h"
#include "resampling_queue.h"
#include "timebase.h"
+#include "timecode_renderer.h"
#include "video_encoder.h"
class IDeckLink;
}
}
+void ensure_texture_resolution(PBOFrameAllocator::Userdata *userdata, unsigned field, unsigned width, unsigned height)
+{
+ if (userdata->tex_y[field] == 0 ||
+ userdata->tex_cbcr[field] == 0 ||
+ width != userdata->last_width[field] ||
+ height != userdata->last_height[field]) {
+ size_t cbcr_width = width / 2;
+
+ // 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, 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();
+ userdata->last_width[field] = width;
+ userdata->last_height[field] = height;
+ }
+}
+
+void upload_texture(GLuint tex, GLuint width, GLuint height, GLuint stride, bool interlaced_stride, GLenum format, GLintptr offset)
+{
+ if (interlaced_stride) {
+ stride *= 2;
+ }
+ if (global_flags.flush_pbos) {
+ glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, offset, stride * height);
+ check_error();
+ }
+
+ glBindTexture(GL_TEXTURE_2D, tex);
+ check_error();
+ if (interlaced_stride) {
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, width * 2);
+ check_error();
+ } else {
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+ check_error();
+ }
+
+ glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, width, height, format, GL_UNSIGNED_BYTE, BUFFER_OFFSET(offset));
+ check_error();
+ glBindTexture(GL_TEXTURE_2D, 0);
+ check_error();
+ glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
+ check_error();
+}
+
} // namespace
-void QueueLengthPolicy::update_policy(int queue_length)
+void QueueLengthPolicy::update_policy(unsigned queue_length)
{
- if (queue_length < 0) { // Starvation.
- if (been_at_safe_point_since_last_starvation && safe_queue_length < 5) {
+ if (queue_length == 0) { // Starvation.
+ if (been_at_safe_point_since_last_starvation && safe_queue_length < unsigned(global_flags.max_input_queue_frames)) {
++safe_queue_length;
- fprintf(stderr, "Card %u: Starvation, increasing safe limit to %u frames\n",
+ fprintf(stderr, "Card %u: Starvation, increasing safe limit to %u frame(s)\n",
card_index, safe_queue_length);
}
frames_with_at_least_one = 0;
been_at_safe_point_since_last_starvation = false;
return;
}
- if (queue_length > 0) {
- if (queue_length >= int(safe_queue_length)) {
+ if (queue_length >= 1) {
+ if (queue_length >= safe_queue_length) {
been_at_safe_point_since_last_starvation = true;
}
- if (++frames_with_at_least_one >= 1000 && safe_queue_length > 0) {
+ if (++frames_with_at_least_one >= 1000 && safe_queue_length > 1) {
--safe_queue_length;
- fprintf(stderr, "Card %u: Spare frames for more than 1000 frames, reducing safe limit to %u frames\n",
+ fprintf(stderr, "Card %u: Spare frames for more than 1000 frames, reducing safe limit to %u frame(s)\n",
card_index, safe_queue_length);
frames_with_at_least_one = 0;
}
chroma_subsampler.reset(new ChromaSubsampler(resource_pool.get()));
+ 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 (card->surface == nullptr) {
card->surface = create_surface_with_same_format(mixer_surface);
}
- while (!card->new_frames.empty()) card->new_frames.pop();
+ while (!card->new_frames.empty()) card->new_frames.pop_front();
card->last_timecode = -1;
card->capture->configure_card();
configure_card(card_index, fake_capture, /*is_fake_capture=*/true, card->output.release());
card->queue_length_policy.reset(card_index);
card->capture->start_bm_capture();
- card->output->start_output(bmdModeHD720p5994, pts_int); // FIXME
+ 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;
}
new_frame.length = frame_length;
new_frame.interlaced = false;
new_frame.dropped_frames = dropped_frames;
- card->new_frames.push(move(new_frame));
+ new_frame.received_timestamp = video_frame.received_timestamp;
+ card->new_frames.push_back(move(new_frame));
card->new_frames_changed.notify_all();
}
return;
} else {
field_start_line = video_format.extra_lines_top;
}
-
- if (userdata->tex_y[field] == 0 ||
- userdata->tex_cbcr[field] == 0 ||
- video_format.width != userdata->last_width[field] ||
- video_format.height != userdata->last_height[field]) {
- // We changed resolution since last use of this texture, so we need to create
- // a new object. Note that this each card has its own PBOFrameAllocator,
- // we don't need to worry about these flip-flopping between resolutions.
- glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
- check_error();
- glTexImage2D(GL_TEXTURE_2D, 0, GL_RG8, cbcr_width, video_format.height, 0, GL_RG, GL_UNSIGNED_BYTE, nullptr);
- check_error();
- glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
- check_error();
- glTexImage2D(GL_TEXTURE_2D, 0, GL_R8, video_format.width, video_format.height, 0, GL_RED, GL_UNSIGNED_BYTE, nullptr);
- check_error();
- userdata->last_width[field] = video_format.width;
- userdata->last_height[field] = video_format.height;
- }
-
- GLuint pbo = userdata->pbo;
- check_error();
- glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo);
- check_error();
-
size_t field_y_start = y_offset + video_format.width * field_start_line;
size_t field_cbcr_start = cbcr_offset + cbcr_width * field_start_line * sizeof(uint16_t);
- if (global_flags.flush_pbos) {
- glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, field_y_start, video_format.width * video_format.height);
- check_error();
- glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, field_cbcr_start, cbcr_width * video_format.height * sizeof(uint16_t));
- check_error();
- }
+ ensure_texture_resolution(userdata, field, video_format.width, video_format.height);
- glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr[field]);
- check_error();
- if (interlaced_stride) {
- glPixelStorei(GL_UNPACK_ROW_LENGTH, cbcr_width * 2);
- check_error();
- } else {
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- check_error();
- }
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, cbcr_width, video_format.height, GL_RG, GL_UNSIGNED_BYTE, BUFFER_OFFSET(field_cbcr_start));
- check_error();
- glBindTexture(GL_TEXTURE_2D, userdata->tex_y[field]);
- check_error();
- if (interlaced_stride) {
- glPixelStorei(GL_UNPACK_ROW_LENGTH, video_format.width * 2);
- check_error();
- } else {
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- check_error();
- }
- glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, video_format.width, video_format.height, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET(field_y_start));
- check_error();
- glBindTexture(GL_TEXTURE_2D, 0);
+ glBindBuffer(GL_PIXEL_UNPACK_BUFFER, userdata->pbo);
check_error();
+
+ upload_texture(userdata->tex_y[field], video_format.width, video_format.height, video_format.width, interlaced_stride, GL_RED, field_y_start);
+ upload_texture(userdata->tex_cbcr[field], cbcr_width, video_format.height, cbcr_width * sizeof(uint16_t), interlaced_stride, GL_RG, field_cbcr_start);
+
glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
check_error();
- glPixelStorei(GL_UNPACK_ROW_LENGTH, 0);
- check_error();
};
if (field == 1) {
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(move(new_frame));
+ card->new_frames.push_back(move(new_frame));
card->new_frames_changed.notify_all();
}
}
steady_clock::time_point start, now;
start = steady_clock::now();
- int frame = 0;
int stats_dropped_frames = 0;
while (!should_quit) {
if (desired_output_card_index != output_card_index) {
set_output_card_internal(desired_output_card_index);
}
+ if (output_card_index != -1 &&
+ desired_output_video_mode != output_video_mode) {
+ DeckLinkOutput *output = cards[output_card_index].output.get();
+ output->end_output();
+ desired_output_video_mode = output_video_mode = output->pick_video_mode(desired_output_video_mode);
+ output->start_output(desired_output_video_mode, pts_int);
+ }
CaptureCard::NewFrame new_frames[MAX_VIDEO_CARDS];
bool has_new_frame[MAX_VIDEO_CARDS] = { false };
int64_t frame_duration = output_frame_info.frame_duration;
render_one_frame(frame_duration);
- ++frame;
+ ++frame_num;
pts_int += frame_duration;
now = steady_clock::now();
double elapsed = duration<double>(now - start).count();
- if (frame % 100 == 0) {
+ if (frame_num % 100 == 0) {
printf("%d frames (%d dropped) in %.3f seconds = %.1f fps (%.1f ms/frame)",
- frame, stats_dropped_frames, elapsed, frame / elapsed,
- 1e3 * elapsed / frame);
+ frame_num, stats_dropped_frames, elapsed, frame_num / elapsed,
+ 1e3 * elapsed / frame_num);
// chain->print_phase_timing();
// Check our memory usage, to see if we are close to our mlockall()
if (should_cut.exchange(false)) { // Test and clear.
- video_encoder->do_cut(frame);
+ video_encoder->do_cut(frame_num);
}
#if 0
return (card_index == master_card_index);
}
+void Mixer::trim_queue(CaptureCard *card, unsigned card_index)
+{
+ // 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;
+ }
+ card->queue_length_policy.update_policy(queue_length);
+
+ // 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 > card->queue_length_policy.get_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 <= card->queue_length_policy.get_safe_queue_length()) {
+ // No need to drop anything.
+ break;
+ }
+
+ card->new_frames.pop_front();
+ card->new_frames_changed.notify_all();
+ --queue_length;
+ ++dropped_frames;
+ }
+
+ if (dropped_frames > 0) {
+ fprintf(stderr, "Card %u dropped %u frame(s) to keep latency down.\n",
+ card_index, dropped_frames);
+ }
+}
+
+
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;
for (unsigned card_index = 0; card_index < num_cards; ++card_index) {
CaptureCard *card = &cards[card_index];
- if (card->new_frames.empty()) {
- assert(!input_card_is_master_clock(card_index, master_card_index));
- card->queue_length_policy.update_policy(-1);
- continue;
- }
- new_frames[card_index] = move(card->new_frames.front());
- has_new_frame[card_index] = true;
- card->new_frames.pop();
- card->new_frames_changed.notify_all();
-
if (input_card_is_master_clock(card_index, master_card_index)) {
// We don't use the queue length policy for the master card,
// but we will if it stops being the master. Thus, clear out
// the policy in case we switch in the future.
card->queue_length_policy.reset(card_index);
+ assert(!card->new_frames.empty());
} else {
- // If we have excess frames compared to the policy for this card,
- // drop frames from the head.
- card->queue_length_policy.update_policy(card->new_frames.size());
- while (card->new_frames.size() > card->queue_length_policy.get_safe_queue_length()) {
- card->new_frames.pop();
- }
+ trim_queue(card, card_index);
+ }
+ if (!card->new_frames.empty()) {
+ 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();
}
}
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());
+ }
+
// 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;
GLuint fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex, rgba_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);
chroma_subsampler->subsample_chroma(cbcr_full_tex, global_flags.width, global_flags.height, cbcr_tex);
last_mode_scan_change[card_index] = steady_clock::now();
}
+map<uint32_t, bmusb::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) {
projects / nageru / blobdiff