-#define EXTRAHEIGHT 30
-
#undef Success
#include "mixer.h"
#include <movit/flat_input.h>
#include <movit/image_format.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>
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->frame_allocator.reset(new PBOFrameAllocator(8 << 20, WIDTH, HEIGHT)); // 8 MB.
card->usb->set_video_frame_allocator(card->frame_allocator.get());
card->surface = create_surface(format);
card->usb->set_dequeue_thread_callbacks(
}
}
-// 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,
{
CaptureCard *card = &cards[card_index];
- int64_t frame_length = find_frame_length(video_format);
+ unsigned width, height, second_field_start, frame_rate_nom, frame_rate_den, extra_lines_top, extra_lines_bottom;
+ bool interlaced;
+
+ decode_video_format(video_format, &width, &height, &second_field_start, &extra_lines_top, &extra_lines_bottom,
+ &frame_rate_nom, &frame_rate_den, &interlaced); // Ignore return value for now.
+ int64_t frame_length = TIMEBASE * frame_rate_den / 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) {
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 * frame_rate_den / 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);
+ silence.resize(silence_samples * 2);
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) {
+ if (video_frame.len - video_offset == 0 ||
+ video_frame.len - video_offset != size_t(width * (height + extra_lines_top + extra_lines_bottom) * 2)) {
if (video_frame.len != 0) {
printf("Card %d: Dropping video frame with wrong length (%ld)\n",
card_index, video_frame.len - video_offset);
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 = interlaced ? 2 : 1;
+ timespec frame_upload_start;
+ if (interlaced) {
+ // NOTE: This isn't deinterlacing. This is just sending the two fields along
+ // as separate frames without considering anything like the half-field offset.
+ // We'll need to add a proper deinterlacer on the receiving side to get this right.
+ assert(height % 2 == 0);
+ height /= 2;
+ assert(frame_length % 2 == 0);
+ frame_length /= 2;
+ num_fields = 2;
+ clock_gettime(CLOCK_MONOTONIC, &frame_upload_start);
+ }
+ 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 = 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) ? second_field_start : extra_lines_top + field * (height + 22);
+
+ if (userdata->tex_y[field] == 0 ||
+ userdata->tex_cbcr[field] == 0 ||
+ width != userdata->last_width[field] ||
+ 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, 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;
+ }
- {
- 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();
+ glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, video_frame.size);
+ 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, 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, width, height, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET(y_offset + width * field_start_line));
+ check_error();
+ glBindTexture(GL_TEXTURE_2D, 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 = 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;
+ }
+ }
}
}
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);
}
}
continue;
assert(card->new_frame != nullptr);
- bmusb_current_rendering_frame[card_index] = card->new_frame;
+ if (card->new_frame_interlaced) {
+ for (unsigned frame_num = FRAME_HISTORY_LENGTH; frame_num --> 1; ) { // :-)
+ buffered_frames[card_index][frame_num] = buffered_frames[card_index][frame_num - 1];
+ }
+ buffered_frames[card_index][0] = { card->new_frame, card->new_frame_field };
+ } else {
+ for (unsigned frame_num = 0; frame_num < FRAME_HISTORY_LENGTH; ++frame_num) {
+ buffered_frames[card_index][frame_num] = { card->new_frame, card->new_frame_field };
+ }
+ }
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);
+ EffectChain *chain = theme_main_chain.chain;
+ theme_main_chain.setup_chain();
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); // 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);
}
projects / nageru / blobdiff