1 #include "video_stream.h"
4 #include <libavformat/avformat.h>
5 #include <libavformat/avio.h>
8 #include "chroma_subsampler.h"
13 #include "jpeg_frame_view.h"
14 #include "movit/util.h"
18 #include "ycbcr_converter.h"
20 #include <epoxy/glx.h>
25 using namespace std::chrono;
27 extern HTTPD *global_httpd;
29 struct VectorDestinationManager {
30 jpeg_destination_mgr pub;
31 std::vector<uint8_t> dest;
33 VectorDestinationManager()
35 pub.init_destination = init_destination_thunk;
36 pub.empty_output_buffer = empty_output_buffer_thunk;
37 pub.term_destination = term_destination_thunk;
40 static void init_destination_thunk(j_compress_ptr ptr)
42 ((VectorDestinationManager *)(ptr->dest))->init_destination();
45 inline void init_destination()
50 static boolean empty_output_buffer_thunk(j_compress_ptr ptr)
52 return ((VectorDestinationManager *)(ptr->dest))->empty_output_buffer();
55 inline bool empty_output_buffer()
57 make_room(dest.size()); // Should ignore pub.free_in_buffer!
61 inline void make_room(size_t bytes_used)
63 dest.resize(bytes_used + 4096);
64 dest.resize(dest.capacity());
65 pub.next_output_byte = dest.data() + bytes_used;
66 pub.free_in_buffer = dest.size() - bytes_used;
69 static void term_destination_thunk(j_compress_ptr ptr)
71 ((VectorDestinationManager *)(ptr->dest))->term_destination();
74 inline void term_destination()
76 dest.resize(dest.size() - pub.free_in_buffer);
79 static_assert(std::is_standard_layout<VectorDestinationManager>::value, "");
81 vector<uint8_t> encode_jpeg(const uint8_t *y_data, const uint8_t *cb_data, const uint8_t *cr_data, unsigned width, unsigned height)
83 VectorDestinationManager dest;
85 jpeg_compress_struct cinfo;
87 cinfo.err = jpeg_std_error(&jerr);
88 jpeg_create_compress(&cinfo);
90 cinfo.dest = (jpeg_destination_mgr *)&dest;
91 cinfo.input_components = 3;
92 cinfo.in_color_space = JCS_RGB;
93 jpeg_set_defaults(&cinfo);
94 constexpr int quality = 90;
95 jpeg_set_quality(&cinfo, quality, /*force_baseline=*/false);
97 cinfo.image_width = width;
98 cinfo.image_height = height;
99 cinfo.raw_data_in = true;
100 jpeg_set_colorspace(&cinfo, JCS_YCbCr);
101 cinfo.comp_info[0].h_samp_factor = 2;
102 cinfo.comp_info[0].v_samp_factor = 1;
103 cinfo.comp_info[1].h_samp_factor = 1;
104 cinfo.comp_info[1].v_samp_factor = 1;
105 cinfo.comp_info[2].h_samp_factor = 1;
106 cinfo.comp_info[2].v_samp_factor = 1;
107 cinfo.CCIR601_sampling = true; // Seems to be mostly ignored by libjpeg, though.
108 jpeg_start_compress(&cinfo, true);
110 JSAMPROW yptr[8], cbptr[8], crptr[8];
111 JSAMPARRAY data[3] = { yptr, cbptr, crptr };
112 for (unsigned y = 0; y < height; y += 8) {
113 for (unsigned yy = 0; yy < 8; ++yy) {
114 yptr[yy] = const_cast<JSAMPROW>(&y_data[(y + yy) * width]);
115 cbptr[yy] = const_cast<JSAMPROW>(&cb_data[(y + yy) * width / 2]);
116 crptr[yy] = const_cast<JSAMPROW>(&cr_data[(y + yy) * width / 2]);
119 jpeg_write_raw_data(&cinfo, data, /*num_lines=*/8);
122 jpeg_finish_compress(&cinfo);
123 jpeg_destroy_compress(&cinfo);
125 return move(dest.dest);
128 VideoStream::VideoStream()
130 ycbcr_converter.reset(new YCbCrConverter(YCbCrConverter::OUTPUT_TO_DUAL_YCBCR, /*resource_pool=*/nullptr));
131 ycbcr_semiplanar_converter.reset(new YCbCrConverter(YCbCrConverter::OUTPUT_TO_SEMIPLANAR, /*resource_pool=*/nullptr));
133 GLuint input_tex[num_interpolate_slots], gray_tex[num_interpolate_slots];
134 GLuint fade_y_output_tex[num_interpolate_slots], fade_cbcr_output_tex[num_interpolate_slots];
135 GLuint cb_tex[num_interpolate_slots], cr_tex[num_interpolate_slots];
137 glCreateTextures(GL_TEXTURE_2D_ARRAY, num_interpolate_slots, input_tex);
138 glCreateTextures(GL_TEXTURE_2D_ARRAY, num_interpolate_slots, gray_tex);
139 glCreateTextures(GL_TEXTURE_2D, num_interpolate_slots, fade_y_output_tex);
140 glCreateTextures(GL_TEXTURE_2D, num_interpolate_slots, fade_cbcr_output_tex);
141 glCreateTextures(GL_TEXTURE_2D, num_interpolate_slots, cb_tex);
142 glCreateTextures(GL_TEXTURE_2D, num_interpolate_slots, cr_tex);
145 constexpr size_t width = 1280, height = 720; // FIXME: adjustable width, height
146 int levels = find_num_levels(width, height);
147 for (size_t i = 0; i < num_interpolate_slots; ++i) {
148 glTextureStorage3D(input_tex[i], levels, GL_RGBA8, width, height, 2);
150 glTextureStorage3D(gray_tex[i], levels, GL_R8, width, height, 2);
152 glTextureStorage2D(fade_y_output_tex[i], 1, GL_R8, width, height);
154 glTextureStorage2D(fade_cbcr_output_tex[i], 1, GL_RG8, width, height);
156 glTextureStorage2D(cb_tex[i], 1, GL_R8, width / 2, height);
158 glTextureStorage2D(cr_tex[i], 1, GL_R8, width / 2, height);
161 unique_ptr<InterpolatedFrameResources> resource(new InterpolatedFrameResources);
162 resource->owner = this;
163 resource->input_tex = input_tex[i];
164 resource->gray_tex = gray_tex[i];
165 resource->fade_y_output_tex = fade_y_output_tex[i];
166 resource->fade_cbcr_output_tex = fade_cbcr_output_tex[i];
167 resource->cb_tex = cb_tex[i];
168 resource->cr_tex = cr_tex[i];
169 glCreateFramebuffers(2, resource->input_fbos);
171 glCreateFramebuffers(1, &resource->fade_fbo);
174 glNamedFramebufferTextureLayer(resource->input_fbos[0], GL_COLOR_ATTACHMENT0, input_tex[i], 0, 0);
176 glNamedFramebufferTextureLayer(resource->input_fbos[0], GL_COLOR_ATTACHMENT1, gray_tex[i], 0, 0);
178 glNamedFramebufferTextureLayer(resource->input_fbos[1], GL_COLOR_ATTACHMENT0, input_tex[i], 0, 1);
180 glNamedFramebufferTextureLayer(resource->input_fbos[1], GL_COLOR_ATTACHMENT1, gray_tex[i], 0, 1);
182 glNamedFramebufferTexture(resource->fade_fbo, GL_COLOR_ATTACHMENT0, fade_y_output_tex[i], 0);
184 glNamedFramebufferTexture(resource->fade_fbo, GL_COLOR_ATTACHMENT1, fade_cbcr_output_tex[i], 0);
187 GLuint bufs[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 };
188 glNamedFramebufferDrawBuffers(resource->input_fbos[0], 2, bufs);
190 glNamedFramebufferDrawBuffers(resource->input_fbos[1], 2, bufs);
192 glNamedFramebufferDrawBuffers(resource->fade_fbo, 2, bufs);
195 glCreateBuffers(1, &resource->pbo);
197 glNamedBufferStorage(resource->pbo, width * height * 4, nullptr, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
199 resource->pbo_contents = glMapNamedBufferRange(resource->pbo, 0, width * height * 4, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
200 interpolate_resources.push_back(move(resource));
206 if (global_flags.interpolation_quality == 1) {
207 op = operating_point1;
208 } else if (global_flags.interpolation_quality == 2) {
209 op = operating_point2;
210 } else if (global_flags.interpolation_quality == 3) {
211 op = operating_point3;
212 } else if (global_flags.interpolation_quality == 4) {
213 op = operating_point4;
218 compute_flow.reset(new DISComputeFlow(width, height, op));
219 interpolate.reset(new Interpolate(op, /*split_ycbcr_output=*/true));
220 interpolate_no_split.reset(new Interpolate(op, /*split_ycbcr_output=*/false));
221 chroma_subsampler.reset(new ChromaSubsampler);
224 // The “last frame” is initially black.
225 unique_ptr<uint8_t[]> y(new uint8_t[1280 * 720]);
226 unique_ptr<uint8_t[]> cb_or_cr(new uint8_t[640 * 720]);
227 memset(y.get(), 16, 1280 * 720);
228 memset(cb_or_cr.get(), 128, 640 * 720);
229 last_frame = encode_jpeg(y.get(), cb_or_cr.get(), cb_or_cr.get(), 1280, 720);
232 VideoStream::~VideoStream() {}
234 void VideoStream::start()
236 AVFormatContext *avctx = avformat_alloc_context();
237 avctx->oformat = av_guess_format("nut", nullptr, nullptr);
239 uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
240 avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, nullptr, nullptr);
241 avctx->pb->write_data_type = &VideoStream::write_packet2_thunk;
242 avctx->pb->ignore_boundary_point = 1;
244 Mux::Codec video_codec = Mux::CODEC_MJPEG;
246 avctx->flags = AVFMT_FLAG_CUSTOM_IO;
248 string video_extradata;
250 constexpr int width = 1280, height = 720; // Doesn't matter for MJPEG.
251 stream_mux.reset(new Mux(avctx, width, height, video_codec, video_extradata, /*audio_codec_parameters=*/nullptr, COARSE_TIMEBASE,
252 /*write_callback=*/nullptr, Mux::WRITE_FOREGROUND, {}));
255 encode_thread = thread(&VideoStream::encode_thread_func, this);
258 void VideoStream::stop()
260 encode_thread.join();
263 void VideoStream::clear_queue()
265 deque<QueuedFrame> q;
268 unique_lock<mutex> lock(queue_lock);
269 q = move(frame_queue);
272 // These are not RAII-ed, unfortunately, so we'll need to clean them ourselves.
273 // Note that release_texture() is thread-safe.
274 for (const QueuedFrame &qf : q) {
275 if (qf.type == QueuedFrame::INTERPOLATED ||
276 qf.type == QueuedFrame::FADED_INTERPOLATED) {
277 compute_flow->release_texture(qf.flow_tex);
279 if (qf.type == QueuedFrame::INTERPOLATED) {
280 interpolate->release_texture(qf.output_tex);
281 interpolate->release_texture(qf.cbcr_tex);
285 // Destroy q outside the mutex, as that would be a double-lock.
288 void VideoStream::schedule_original_frame(steady_clock::time_point local_pts,
289 int64_t output_pts, function<void()> &&display_func,
290 QueueSpotHolder &&queue_spot_holder,
293 fprintf(stderr, "output_pts=%ld original input_pts=%ld\n", output_pts, frame.pts);
295 // Preload the file from disk, so that the encoder thread does not get stalled.
296 // TODO: Consider sending it through the queue instead.
297 (void)frame_reader.read_frame(frame);
300 qf.local_pts = local_pts;
301 qf.type = QueuedFrame::ORIGINAL;
302 qf.output_pts = output_pts;
304 qf.display_func = move(display_func);
305 qf.queue_spot_holder = move(queue_spot_holder);
307 unique_lock<mutex> lock(queue_lock);
308 frame_queue.push_back(move(qf));
309 queue_changed.notify_all();
312 void VideoStream::schedule_faded_frame(steady_clock::time_point local_pts, int64_t output_pts,
313 function<void()> &&display_func,
314 QueueSpotHolder &&queue_spot_holder,
315 FrameOnDisk frame1_spec, FrameOnDisk frame2_spec,
318 fprintf(stderr, "output_pts=%ld faded input_pts=%ld,%ld fade_alpha=%.2f\n", output_pts, frame1_spec.pts, frame2_spec.pts, fade_alpha);
320 // Get the temporary OpenGL resources we need for doing the fade.
321 // (We share these with interpolated frames, which is slightly
322 // overkill, but there's no need to waste resources on keeping
323 // separate pools around.)
324 BorrowedInterpolatedFrameResources resources;
326 unique_lock<mutex> lock(queue_lock);
327 if (interpolate_resources.empty()) {
328 fprintf(stderr, "WARNING: Too many interpolated frames already in transit; dropping one.\n");
331 resources = BorrowedInterpolatedFrameResources(interpolate_resources.front().release());
332 interpolate_resources.pop_front();
337 shared_ptr<Frame> frame1 = decode_jpeg_with_cache(frame1_spec, DECODE_IF_NOT_IN_CACHE, &frame_reader, &did_decode);
338 shared_ptr<Frame> frame2 = decode_jpeg_with_cache(frame2_spec, DECODE_IF_NOT_IN_CACHE, &frame_reader, &did_decode);
340 ycbcr_semiplanar_converter->prepare_chain_for_fade(frame1, frame2, fade_alpha)->render_to_fbo(resources->fade_fbo, 1280, 720);
343 qf.local_pts = local_pts;
344 qf.type = QueuedFrame::FADED;
345 qf.output_pts = output_pts;
346 qf.frame1 = frame1_spec;
347 qf.display_func = move(display_func);
348 qf.queue_spot_holder = move(queue_spot_holder);
350 qf.secondary_frame = frame2_spec;
352 // Subsample and split Cb/Cr.
353 chroma_subsampler->subsample_chroma(resources->fade_cbcr_output_tex, 1280, 720, resources->cb_tex, resources->cr_tex);
355 // Read it down (asynchronously) to the CPU.
356 glPixelStorei(GL_PACK_ROW_LENGTH, 0);
357 glBindBuffer(GL_PIXEL_PACK_BUFFER, resources->pbo);
359 glGetTextureImage(resources->fade_y_output_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 4, BUFFER_OFFSET(0));
361 glGetTextureImage(resources->cb_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3, BUFFER_OFFSET(1280 * 720));
363 glGetTextureImage(resources->cr_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3 - 640 * 720, BUFFER_OFFSET(1280 * 720 + 640 * 720));
365 glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
367 // Set a fence we can wait for to make sure the CPU sees the read.
368 glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
370 qf.fence = RefCountedGLsync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
372 qf.resources = move(resources);
373 qf.local_pts = local_pts;
375 unique_lock<mutex> lock(queue_lock);
376 frame_queue.push_back(move(qf));
377 queue_changed.notify_all();
380 void VideoStream::schedule_interpolated_frame(steady_clock::time_point local_pts,
381 int64_t output_pts, function<void(shared_ptr<Frame>)> &&display_func,
382 QueueSpotHolder &&queue_spot_holder,
383 FrameOnDisk frame1, FrameOnDisk frame2,
384 float alpha, FrameOnDisk secondary_frame, float fade_alpha)
386 if (secondary_frame.pts != -1) {
387 fprintf(stderr, "output_pts=%ld interpolated input_pts1=%ld input_pts2=%ld alpha=%.3f secondary_pts=%ld fade_alpha=%.2f\n", output_pts, frame1.pts, frame2.pts, alpha, secondary_frame.pts, fade_alpha);
389 fprintf(stderr, "output_pts=%ld interpolated input_pts1=%ld input_pts2=%ld alpha=%.3f\n", output_pts, frame1.pts, frame2.pts, alpha);
392 // Get the temporary OpenGL resources we need for doing the interpolation.
393 BorrowedInterpolatedFrameResources resources;
395 unique_lock<mutex> lock(queue_lock);
396 if (interpolate_resources.empty()) {
397 fprintf(stderr, "WARNING: Too many interpolated frames already in transit; dropping one.\n");
400 resources = BorrowedInterpolatedFrameResources(interpolate_resources.front().release());
401 interpolate_resources.pop_front();
405 qf.type = (secondary_frame.pts == -1) ? QueuedFrame::INTERPOLATED : QueuedFrame::FADED_INTERPOLATED;
406 qf.output_pts = output_pts;
407 qf.display_decoded_func = move(display_func);
408 qf.queue_spot_holder = move(queue_spot_holder);
409 qf.local_pts = local_pts;
413 // Convert frame0 and frame1 to OpenGL textures.
414 for (size_t frame_no = 0; frame_no < 2; ++frame_no) {
415 FrameOnDisk frame_spec = frame_no == 1 ? frame2 : frame1;
417 shared_ptr<Frame> frame = decode_jpeg_with_cache(frame_spec, DECODE_IF_NOT_IN_CACHE, &frame_reader, &did_decode);
418 ycbcr_converter->prepare_chain_for_conversion(frame)->render_to_fbo(resources->input_fbos[frame_no], 1280, 720);
421 glGenerateTextureMipmap(resources->input_tex);
423 glGenerateTextureMipmap(resources->gray_tex);
426 // Compute the interpolated frame.
427 qf.flow_tex = compute_flow->exec(resources->gray_tex, DISComputeFlow::FORWARD_AND_BACKWARD, DISComputeFlow::DO_NOT_RESIZE_FLOW);
430 if (secondary_frame.pts != -1) {
431 // Fade. First kick off the interpolation.
432 tie(qf.output_tex, ignore) = interpolate_no_split->exec(resources->input_tex, resources->gray_tex, qf.flow_tex, 1280, 720, alpha);
435 // Now decode the image we are fading against.
437 shared_ptr<Frame> frame2 = decode_jpeg_with_cache(secondary_frame, DECODE_IF_NOT_IN_CACHE, &frame_reader, &did_decode);
439 // Then fade against it, putting it into the fade Y' and CbCr textures.
440 ycbcr_semiplanar_converter->prepare_chain_for_fade_from_texture(qf.output_tex, frame2, fade_alpha)->render_to_fbo(resources->fade_fbo, 1280, 720);
442 // Subsample and split Cb/Cr.
443 chroma_subsampler->subsample_chroma(resources->fade_cbcr_output_tex, 1280, 720, resources->cb_tex, resources->cr_tex);
445 interpolate_no_split->release_texture(qf.output_tex);
447 tie(qf.output_tex, qf.cbcr_tex) = interpolate->exec(resources->input_tex, resources->gray_tex, qf.flow_tex, 1280, 720, alpha);
450 // Subsample and split Cb/Cr.
451 chroma_subsampler->subsample_chroma(qf.cbcr_tex, 1280, 720, resources->cb_tex, resources->cr_tex);
454 // We could have released qf.flow_tex here, but to make sure we don't cause a stall
455 // when trying to reuse it for the next frame, we can just as well hold on to it
456 // and release it only when the readback is done.
458 // Read it down (asynchronously) to the CPU.
459 glPixelStorei(GL_PACK_ROW_LENGTH, 0);
460 glBindBuffer(GL_PIXEL_PACK_BUFFER, resources->pbo);
462 if (secondary_frame.pts != -1) {
463 glGetTextureImage(resources->fade_y_output_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 4, BUFFER_OFFSET(0));
465 glGetTextureImage(qf.output_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 4, BUFFER_OFFSET(0));
468 glGetTextureImage(resources->cb_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3, BUFFER_OFFSET(1280 * 720));
470 glGetTextureImage(resources->cr_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3 - 640 * 720, BUFFER_OFFSET(1280 * 720 + 640 * 720));
472 glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
474 // Set a fence we can wait for to make sure the CPU sees the read.
475 glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
477 qf.fence = RefCountedGLsync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
479 qf.resources = move(resources);
481 unique_lock<mutex> lock(queue_lock);
482 frame_queue.push_back(move(qf));
483 queue_changed.notify_all();
486 void VideoStream::schedule_refresh_frame(steady_clock::time_point local_pts,
487 int64_t output_pts, function<void()> &&display_func,
488 QueueSpotHolder &&queue_spot_holder)
491 qf.type = QueuedFrame::REFRESH;
492 qf.output_pts = output_pts;
493 qf.display_func = move(display_func);
494 qf.queue_spot_holder = move(queue_spot_holder);
496 unique_lock<mutex> lock(queue_lock);
497 frame_queue.push_back(move(qf));
498 queue_changed.notify_all();
503 shared_ptr<Frame> frame_from_pbo(void *contents, size_t width, size_t height)
505 size_t chroma_width = width / 2;
507 const uint8_t *y = (const uint8_t *)contents;
508 const uint8_t *cb = (const uint8_t *)contents + width * height;
509 const uint8_t *cr = (const uint8_t *)contents + width * height + chroma_width * height;
511 shared_ptr<Frame> frame(new Frame);
512 frame->y.reset(new uint8_t[width * height]);
513 frame->cb.reset(new uint8_t[chroma_width * height]);
514 frame->cr.reset(new uint8_t[chroma_width * height]);
515 for (unsigned yy = 0; yy < height; ++yy) {
516 memcpy(frame->y.get() + width * yy, y + width * yy, width);
517 memcpy(frame->cb.get() + chroma_width * yy, cb + chroma_width * yy, chroma_width);
518 memcpy(frame->cr.get() + chroma_width * yy, cr + chroma_width * yy, chroma_width);
520 frame->is_semiplanar = false;
521 frame->width = width;
522 frame->height = height;
523 frame->chroma_subsampling_x = 2;
524 frame->chroma_subsampling_y = 1;
525 frame->pitch_y = width;
526 frame->pitch_chroma = chroma_width;
532 void VideoStream::encode_thread_func()
534 pthread_setname_np(pthread_self(), "VideoStream");
535 QSurface *surface = create_surface();
536 QOpenGLContext *context = create_context(surface);
537 bool ok = make_current(context, surface);
539 fprintf(stderr, "Video stream couldn't get an OpenGL context\n");
546 unique_lock<mutex> lock(queue_lock);
548 // Wait until we have a frame to play.
549 queue_changed.wait(lock, [this]{
550 return !frame_queue.empty();
552 steady_clock::time_point frame_start = frame_queue.front().local_pts;
554 // Now sleep until the frame is supposed to start (the usual case),
555 // _or_ clear_queue() happened.
556 bool aborted = queue_changed.wait_until(lock, frame_start, [this, frame_start]{
557 return frame_queue.empty() || frame_queue.front().local_pts != frame_start;
560 // clear_queue() happened, so don't play this frame after all.
563 qf = move(frame_queue.front());
564 frame_queue.pop_front();
567 if (qf.type == QueuedFrame::ORIGINAL) {
568 // Send the JPEG frame on, unchanged.
569 string jpeg = frame_reader.read_frame(qf.frame1);
571 av_init_packet(&pkt);
572 pkt.stream_index = 0;
573 pkt.data = (uint8_t *)jpeg.data();
574 pkt.size = jpeg.size();
575 stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
577 last_frame.assign(&jpeg[0], &jpeg[0] + jpeg.size());
578 } else if (qf.type == QueuedFrame::FADED) {
579 glClientWaitSync(qf.fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
581 shared_ptr<Frame> frame = frame_from_pbo(qf.resources->pbo_contents, 1280, 720);
583 // Now JPEG encode it, and send it on to the stream.
584 vector<uint8_t> jpeg = encode_jpeg(frame->y.get(), frame->cb.get(), frame->cr.get(), 1280, 720);
587 av_init_packet(&pkt);
588 pkt.stream_index = 0;
589 pkt.data = (uint8_t *)jpeg.data();
590 pkt.size = jpeg.size();
591 stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
592 last_frame = move(jpeg);
593 } else if (qf.type == QueuedFrame::INTERPOLATED || qf.type == QueuedFrame::FADED_INTERPOLATED) {
594 glClientWaitSync(qf.fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
596 // Send it on to display.
597 shared_ptr<Frame> frame = frame_from_pbo(qf.resources->pbo_contents, 1280, 720);
598 if (qf.display_decoded_func != nullptr) {
599 qf.display_decoded_func(frame);
602 // Now JPEG encode it, and send it on to the stream.
603 vector<uint8_t> jpeg = encode_jpeg(frame->y.get(), frame->cb.get(), frame->cr.get(), 1280, 720);
604 compute_flow->release_texture(qf.flow_tex);
605 if (qf.type != QueuedFrame::FADED_INTERPOLATED) {
606 interpolate->release_texture(qf.output_tex);
607 interpolate->release_texture(qf.cbcr_tex);
611 av_init_packet(&pkt);
612 pkt.stream_index = 0;
613 pkt.data = (uint8_t *)jpeg.data();
614 pkt.size = jpeg.size();
615 stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
616 last_frame = move(jpeg);
617 } else if (qf.type == QueuedFrame::REFRESH) {
619 av_init_packet(&pkt);
620 pkt.stream_index = 0;
621 pkt.data = (uint8_t *)last_frame.data();
622 pkt.size = last_frame.size();
623 stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
627 if (qf.display_func != nullptr) {
633 int VideoStream::write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
635 VideoStream *video_stream = (VideoStream *)opaque;
636 return video_stream->write_packet2(buf, buf_size, type, time);
639 int VideoStream::write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
641 if (type == AVIO_DATA_MARKER_SYNC_POINT || type == AVIO_DATA_MARKER_BOUNDARY_POINT) {
642 seen_sync_markers = true;
643 } else if (type == AVIO_DATA_MARKER_UNKNOWN && !seen_sync_markers) {
644 // We don't know if this is a keyframe or not (the muxer could
645 // avoid marking it), so we just have to make the best of it.
646 type = AVIO_DATA_MARKER_SYNC_POINT;
649 if (type == AVIO_DATA_MARKER_HEADER) {
650 stream_mux_header.append((char *)buf, buf_size);
651 global_httpd->set_header(stream_mux_header);
653 global_httpd->add_data((char *)buf, buf_size, type == AVIO_DATA_MARKER_SYNC_POINT, time, AVRational{ AV_TIME_BASE, 1 });