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;
31 string read_file(const string &filename)
33 FILE *fp = fopen(filename.c_str(), "rb");
35 perror(filename.c_str());
39 fseek(fp, 0, SEEK_END);
45 fread(&ret[0], len, 1, fp);
52 struct VectorDestinationManager {
53 jpeg_destination_mgr pub;
54 std::vector<uint8_t> dest;
56 VectorDestinationManager()
58 pub.init_destination = init_destination_thunk;
59 pub.empty_output_buffer = empty_output_buffer_thunk;
60 pub.term_destination = term_destination_thunk;
63 static void init_destination_thunk(j_compress_ptr ptr)
65 ((VectorDestinationManager *)(ptr->dest))->init_destination();
68 inline void init_destination()
73 static boolean empty_output_buffer_thunk(j_compress_ptr ptr)
75 return ((VectorDestinationManager *)(ptr->dest))->empty_output_buffer();
78 inline bool empty_output_buffer()
80 make_room(dest.size()); // Should ignore pub.free_in_buffer!
84 inline void make_room(size_t bytes_used)
86 dest.resize(bytes_used + 4096);
87 dest.resize(dest.capacity());
88 pub.next_output_byte = dest.data() + bytes_used;
89 pub.free_in_buffer = dest.size() - bytes_used;
92 static void term_destination_thunk(j_compress_ptr ptr)
94 ((VectorDestinationManager *)(ptr->dest))->term_destination();
97 inline void term_destination()
99 dest.resize(dest.size() - pub.free_in_buffer);
102 static_assert(std::is_standard_layout<VectorDestinationManager>::value, "");
104 vector<uint8_t> encode_jpeg(const uint8_t *y_data, const uint8_t *cb_data, const uint8_t *cr_data, unsigned width, unsigned height)
106 VectorDestinationManager dest;
108 jpeg_compress_struct cinfo;
110 cinfo.err = jpeg_std_error(&jerr);
111 jpeg_create_compress(&cinfo);
113 cinfo.dest = (jpeg_destination_mgr *)&dest;
114 cinfo.input_components = 3;
115 cinfo.in_color_space = JCS_RGB;
116 jpeg_set_defaults(&cinfo);
117 constexpr int quality = 90;
118 jpeg_set_quality(&cinfo, quality, /*force_baseline=*/false);
120 cinfo.image_width = width;
121 cinfo.image_height = height;
122 cinfo.raw_data_in = true;
123 jpeg_set_colorspace(&cinfo, JCS_YCbCr);
124 cinfo.comp_info[0].h_samp_factor = 2;
125 cinfo.comp_info[0].v_samp_factor = 1;
126 cinfo.comp_info[1].h_samp_factor = 1;
127 cinfo.comp_info[1].v_samp_factor = 1;
128 cinfo.comp_info[2].h_samp_factor = 1;
129 cinfo.comp_info[2].v_samp_factor = 1;
130 cinfo.CCIR601_sampling = true; // Seems to be mostly ignored by libjpeg, though.
131 jpeg_start_compress(&cinfo, true);
133 JSAMPROW yptr[8], cbptr[8], crptr[8];
134 JSAMPARRAY data[3] = { yptr, cbptr, crptr };
135 for (unsigned y = 0; y < height; y += 8) {
136 for (unsigned yy = 0; yy < 8; ++yy) {
137 yptr[yy] = const_cast<JSAMPROW>(&y_data[(y + yy) * width]);
138 cbptr[yy] = const_cast<JSAMPROW>(&cb_data[(y + yy) * width / 2]);
139 crptr[yy] = const_cast<JSAMPROW>(&cr_data[(y + yy) * width / 2]);
142 jpeg_write_raw_data(&cinfo, data, /*num_lines=*/8);
145 jpeg_finish_compress(&cinfo);
146 jpeg_destroy_compress(&cinfo);
148 return move(dest.dest);
151 VideoStream::VideoStream()
153 ycbcr_converter.reset(new YCbCrConverter(YCbCrConverter::OUTPUT_TO_DUAL_YCBCR, /*resource_pool=*/nullptr));
154 ycbcr_semiplanar_converter.reset(new YCbCrConverter(YCbCrConverter::OUTPUT_TO_SEMIPLANAR, /*resource_pool=*/nullptr));
156 GLuint input_tex[num_interpolate_slots], gray_tex[num_interpolate_slots];
157 GLuint fade_y_output_tex[num_interpolate_slots], fade_cbcr_output_tex[num_interpolate_slots];
158 GLuint cb_tex[num_interpolate_slots], cr_tex[num_interpolate_slots];
160 glCreateTextures(GL_TEXTURE_2D_ARRAY, num_interpolate_slots, input_tex);
161 glCreateTextures(GL_TEXTURE_2D_ARRAY, num_interpolate_slots, gray_tex);
162 glCreateTextures(GL_TEXTURE_2D, num_interpolate_slots, fade_y_output_tex);
163 glCreateTextures(GL_TEXTURE_2D, num_interpolate_slots, fade_cbcr_output_tex);
164 glCreateTextures(GL_TEXTURE_2D, num_interpolate_slots, cb_tex);
165 glCreateTextures(GL_TEXTURE_2D, num_interpolate_slots, cr_tex);
168 constexpr size_t width = 1280, height = 720; // FIXME: adjustable width, height
169 int levels = find_num_levels(width, height);
170 for (size_t i = 0; i < num_interpolate_slots; ++i) {
171 glTextureStorage3D(input_tex[i], levels, GL_RGBA8, width, height, 2);
173 glTextureStorage3D(gray_tex[i], levels, GL_R8, width, height, 2);
175 glTextureStorage2D(fade_y_output_tex[i], 1, GL_R8, width, height);
177 glTextureStorage2D(fade_cbcr_output_tex[i], 1, GL_RG8, width, height);
179 glTextureStorage2D(cb_tex[i], 1, GL_R8, width / 2, height);
181 glTextureStorage2D(cr_tex[i], 1, GL_R8, width / 2, height);
184 unique_ptr<InterpolatedFrameResources> resource(new InterpolatedFrameResources);
185 resource->owner = this;
186 resource->input_tex = input_tex[i];
187 resource->gray_tex = gray_tex[i];
188 resource->fade_y_output_tex = fade_y_output_tex[i];
189 resource->fade_cbcr_output_tex = fade_cbcr_output_tex[i];
190 resource->cb_tex = cb_tex[i];
191 resource->cr_tex = cr_tex[i];
192 glCreateFramebuffers(2, resource->input_fbos);
194 glCreateFramebuffers(1, &resource->fade_fbo);
197 glNamedFramebufferTextureLayer(resource->input_fbos[0], GL_COLOR_ATTACHMENT0, input_tex[i], 0, 0);
199 glNamedFramebufferTextureLayer(resource->input_fbos[0], GL_COLOR_ATTACHMENT1, gray_tex[i], 0, 0);
201 glNamedFramebufferTextureLayer(resource->input_fbos[1], GL_COLOR_ATTACHMENT0, input_tex[i], 0, 1);
203 glNamedFramebufferTextureLayer(resource->input_fbos[1], GL_COLOR_ATTACHMENT1, gray_tex[i], 0, 1);
205 glNamedFramebufferTexture(resource->fade_fbo, GL_COLOR_ATTACHMENT0, fade_y_output_tex[i], 0);
207 glNamedFramebufferTexture(resource->fade_fbo, GL_COLOR_ATTACHMENT1, fade_cbcr_output_tex[i], 0);
210 GLuint bufs[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 };
211 glNamedFramebufferDrawBuffers(resource->input_fbos[0], 2, bufs);
213 glNamedFramebufferDrawBuffers(resource->input_fbos[1], 2, bufs);
215 glNamedFramebufferDrawBuffers(resource->fade_fbo, 2, bufs);
218 glCreateBuffers(1, &resource->pbo);
220 glNamedBufferStorage(resource->pbo, width * height * 4, nullptr, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
222 resource->pbo_contents = glMapNamedBufferRange(resource->pbo, 0, width * height * 4, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
223 interpolate_resources.push_back(move(resource));
229 if (global_flags.interpolation_quality == 1) {
230 op = operating_point1;
231 } else if (global_flags.interpolation_quality == 2) {
232 op = operating_point2;
233 } else if (global_flags.interpolation_quality == 3) {
234 op = operating_point3;
235 } else if (global_flags.interpolation_quality == 4) {
236 op = operating_point4;
241 compute_flow.reset(new DISComputeFlow(width, height, op));
242 interpolate.reset(new Interpolate(op, /*split_ycbcr_output=*/true));
243 interpolate_no_split.reset(new Interpolate(op, /*split_ycbcr_output=*/false));
244 chroma_subsampler.reset(new ChromaSubsampler);
247 // The “last frame” is initially black.
248 unique_ptr<uint8_t[]> y(new uint8_t[1280 * 720]);
249 unique_ptr<uint8_t[]> cb_or_cr(new uint8_t[640 * 720]);
250 memset(y.get(), 16, 1280 * 720);
251 memset(cb_or_cr.get(), 128, 640 * 720);
252 last_frame = encode_jpeg(y.get(), cb_or_cr.get(), cb_or_cr.get(), 1280, 720);
255 VideoStream::~VideoStream() {}
257 void VideoStream::start()
259 AVFormatContext *avctx = avformat_alloc_context();
260 avctx->oformat = av_guess_format("nut", nullptr, nullptr);
262 uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
263 avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, nullptr, nullptr);
264 avctx->pb->write_data_type = &VideoStream::write_packet2_thunk;
265 avctx->pb->ignore_boundary_point = 1;
267 Mux::Codec video_codec = Mux::CODEC_MJPEG;
269 avctx->flags = AVFMT_FLAG_CUSTOM_IO;
271 string video_extradata;
273 constexpr int width = 1280, height = 720; // Doesn't matter for MJPEG.
274 stream_mux.reset(new Mux(avctx, width, height, video_codec, video_extradata, /*audio_codec_parameters=*/nullptr, COARSE_TIMEBASE,
275 /*write_callback=*/nullptr, Mux::WRITE_FOREGROUND, {}));
278 encode_thread = thread(&VideoStream::encode_thread_func, this);
281 void VideoStream::stop()
283 encode_thread.join();
286 void VideoStream::clear_queue()
288 deque<QueuedFrame> q;
291 unique_lock<mutex> lock(queue_lock);
292 q = move(frame_queue);
295 // These are not RAII-ed, unfortunately, so we'll need to clean them ourselves.
296 // Note that release_texture() is thread-safe.
297 for (const QueuedFrame &qf : q) {
298 if (qf.type == QueuedFrame::INTERPOLATED ||
299 qf.type == QueuedFrame::FADED_INTERPOLATED) {
300 compute_flow->release_texture(qf.flow_tex);
302 if (qf.type == QueuedFrame::INTERPOLATED) {
303 interpolate->release_texture(qf.output_tex);
304 interpolate->release_texture(qf.cbcr_tex);
308 // Destroy q outside the mutex, as that would be a double-lock.
311 void VideoStream::schedule_original_frame(steady_clock::time_point local_pts,
312 int64_t output_pts, function<void()> &&display_func,
313 QueueSpotHolder &&queue_spot_holder,
314 unsigned stream_idx, int64_t input_pts)
316 fprintf(stderr, "output_pts=%ld original input_pts=%ld\n", output_pts, input_pts);
318 // Preload the file from disk, so that the encoder thread does not get stalled.
319 // TODO: Consider sending it through the queue instead.
320 (void)read_file(filename_for_frame(stream_idx, input_pts));
323 qf.local_pts = local_pts;
324 qf.type = QueuedFrame::ORIGINAL;
325 qf.output_pts = output_pts;
326 qf.stream_idx = stream_idx;
327 qf.input_first_pts = input_pts;
328 qf.display_func = move(display_func);
329 qf.queue_spot_holder = move(queue_spot_holder);
331 unique_lock<mutex> lock(queue_lock);
332 frame_queue.push_back(move(qf));
333 queue_changed.notify_all();
336 void VideoStream::schedule_faded_frame(steady_clock::time_point local_pts, int64_t output_pts,
337 function<void()> &&display_func,
338 QueueSpotHolder &&queue_spot_holder,
339 unsigned stream_idx, int64_t input_pts, int secondary_stream_idx,
340 int64_t secondary_input_pts, float fade_alpha)
342 fprintf(stderr, "output_pts=%ld faded input_pts=%ld,%ld fade_alpha=%.2f\n", output_pts, input_pts, secondary_input_pts, fade_alpha);
344 // Get the temporary OpenGL resources we need for doing the fade.
345 // (We share these with interpolated frames, which is slightly
346 // overkill, but there's no need to waste resources on keeping
347 // separate pools around.)
348 BorrowedInterpolatedFrameResources resources;
350 unique_lock<mutex> lock(queue_lock);
351 if (interpolate_resources.empty()) {
352 fprintf(stderr, "WARNING: Too many interpolated frames already in transit; dropping one.\n");
355 resources = BorrowedInterpolatedFrameResources(interpolate_resources.front().release());
356 interpolate_resources.pop_front();
362 jpeg_id1.stream_idx = stream_idx;
363 jpeg_id1.pts = input_pts;
364 shared_ptr<Frame> frame1 = decode_jpeg_with_cache(jpeg_id1, DECODE_IF_NOT_IN_CACHE, &did_decode);
367 jpeg_id2.stream_idx = secondary_stream_idx;
368 jpeg_id2.pts = secondary_input_pts;
369 shared_ptr<Frame> frame2 = decode_jpeg_with_cache(jpeg_id2, DECODE_IF_NOT_IN_CACHE, &did_decode);
371 ycbcr_semiplanar_converter->prepare_chain_for_fade(frame1, frame2, fade_alpha)->render_to_fbo(resources->fade_fbo, 1280, 720);
374 qf.local_pts = local_pts;
375 qf.type = QueuedFrame::FADED;
376 qf.output_pts = output_pts;
377 qf.stream_idx = stream_idx;
378 qf.input_first_pts = input_pts;
379 qf.display_func = move(display_func);
380 qf.queue_spot_holder = move(queue_spot_holder);
382 qf.secondary_stream_idx = secondary_stream_idx;
383 qf.secondary_input_pts = secondary_input_pts;
385 // Subsample and split Cb/Cr.
386 chroma_subsampler->subsample_chroma(resources->fade_cbcr_output_tex, 1280, 720, resources->cb_tex, resources->cr_tex);
388 // Read it down (asynchronously) to the CPU.
389 glPixelStorei(GL_PACK_ROW_LENGTH, 0);
390 glBindBuffer(GL_PIXEL_PACK_BUFFER, resources->pbo);
392 glGetTextureImage(resources->fade_y_output_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 4, BUFFER_OFFSET(0));
394 glGetTextureImage(resources->cb_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3, BUFFER_OFFSET(1280 * 720));
396 glGetTextureImage(resources->cr_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3 - 640 * 720, BUFFER_OFFSET(1280 * 720 + 640 * 720));
398 glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
400 // Set a fence we can wait for to make sure the CPU sees the read.
401 glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
403 qf.fence = RefCountedGLsync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
405 qf.resources = move(resources);
406 qf.local_pts = local_pts;
408 unique_lock<mutex> lock(queue_lock);
409 frame_queue.push_back(move(qf));
410 queue_changed.notify_all();
413 void VideoStream::schedule_interpolated_frame(steady_clock::time_point local_pts,
414 int64_t output_pts, function<void(shared_ptr<Frame>)> &&display_func,
415 QueueSpotHolder &&queue_spot_holder,
416 unsigned stream_idx, int64_t input_first_pts,
417 int64_t input_second_pts, float alpha,
418 int secondary_stream_idx, int64_t secondary_input_pts,
421 if (secondary_stream_idx != -1) {
422 fprintf(stderr, "output_pts=%ld interpolated input_pts1=%ld input_pts2=%ld alpha=%.3f secondary_pts=%ld fade_alpha=%.2f\n", output_pts, input_first_pts, input_second_pts, alpha, secondary_input_pts, fade_alpha);
424 fprintf(stderr, "output_pts=%ld interpolated input_pts1=%ld input_pts2=%ld alpha=%.3f\n", output_pts, input_first_pts, input_second_pts, alpha);
427 // Get the temporary OpenGL resources we need for doing the interpolation.
428 BorrowedInterpolatedFrameResources resources;
430 unique_lock<mutex> lock(queue_lock);
431 if (interpolate_resources.empty()) {
432 fprintf(stderr, "WARNING: Too many interpolated frames already in transit; dropping one.\n");
435 resources = BorrowedInterpolatedFrameResources(interpolate_resources.front().release());
436 interpolate_resources.pop_front();
440 qf.type = (secondary_stream_idx == -1) ? QueuedFrame::INTERPOLATED : QueuedFrame::FADED_INTERPOLATED;
441 qf.output_pts = output_pts;
442 qf.stream_idx = stream_idx;
443 qf.display_decoded_func = move(display_func);
444 qf.queue_spot_holder = move(queue_spot_holder);
445 qf.local_pts = local_pts;
449 // Convert frame0 and frame1 to OpenGL textures.
450 for (size_t frame_no = 0; frame_no < 2; ++frame_no) {
452 jpeg_id.stream_idx = stream_idx;
453 jpeg_id.pts = frame_no == 1 ? input_second_pts : input_first_pts;
455 shared_ptr<Frame> frame = decode_jpeg_with_cache(jpeg_id, DECODE_IF_NOT_IN_CACHE, &did_decode);
456 ycbcr_converter->prepare_chain_for_conversion(frame)->render_to_fbo(resources->input_fbos[frame_no], 1280, 720);
459 glGenerateTextureMipmap(resources->input_tex);
461 glGenerateTextureMipmap(resources->gray_tex);
464 // Compute the interpolated frame.
465 qf.flow_tex = compute_flow->exec(resources->gray_tex, DISComputeFlow::FORWARD_AND_BACKWARD, DISComputeFlow::DO_NOT_RESIZE_FLOW);
468 if (secondary_stream_idx != -1) {
469 // Fade. First kick off the interpolation.
470 tie(qf.output_tex, ignore) = interpolate_no_split->exec(resources->input_tex, resources->gray_tex, qf.flow_tex, 1280, 720, alpha);
473 // Now decode the image we are fading against.
475 jpeg_id.stream_idx = secondary_stream_idx;
476 jpeg_id.pts = secondary_input_pts;
478 shared_ptr<Frame> frame2 = decode_jpeg_with_cache(jpeg_id, DECODE_IF_NOT_IN_CACHE, &did_decode);
480 // Then fade against it, putting it into the fade Y' and CbCr textures.
481 ycbcr_semiplanar_converter->prepare_chain_for_fade_from_texture(qf.output_tex, frame2, fade_alpha)->render_to_fbo(resources->fade_fbo, 1280, 720);
483 // Subsample and split Cb/Cr.
484 chroma_subsampler->subsample_chroma(resources->fade_cbcr_output_tex, 1280, 720, resources->cb_tex, resources->cr_tex);
486 interpolate_no_split->release_texture(qf.output_tex);
488 tie(qf.output_tex, qf.cbcr_tex) = interpolate->exec(resources->input_tex, resources->gray_tex, qf.flow_tex, 1280, 720, alpha);
491 // Subsample and split Cb/Cr.
492 chroma_subsampler->subsample_chroma(qf.cbcr_tex, 1280, 720, resources->cb_tex, resources->cr_tex);
495 // We could have released qf.flow_tex here, but to make sure we don't cause a stall
496 // when trying to reuse it for the next frame, we can just as well hold on to it
497 // and release it only when the readback is done.
499 // Read it down (asynchronously) to the CPU.
500 glPixelStorei(GL_PACK_ROW_LENGTH, 0);
501 glBindBuffer(GL_PIXEL_PACK_BUFFER, resources->pbo);
503 if (secondary_stream_idx != -1) {
504 glGetTextureImage(resources->fade_y_output_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 4, BUFFER_OFFSET(0));
506 glGetTextureImage(qf.output_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 4, BUFFER_OFFSET(0));
509 glGetTextureImage(resources->cb_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3, BUFFER_OFFSET(1280 * 720));
511 glGetTextureImage(resources->cr_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3 - 640 * 720, BUFFER_OFFSET(1280 * 720 + 640 * 720));
513 glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
515 // Set a fence we can wait for to make sure the CPU sees the read.
516 glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
518 qf.fence = RefCountedGLsync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
520 qf.resources = move(resources);
522 unique_lock<mutex> lock(queue_lock);
523 frame_queue.push_back(move(qf));
524 queue_changed.notify_all();
527 void VideoStream::schedule_refresh_frame(steady_clock::time_point local_pts,
528 int64_t output_pts, function<void()> &&display_func,
529 QueueSpotHolder &&queue_spot_holder)
532 qf.type = QueuedFrame::REFRESH;
533 qf.output_pts = output_pts;
534 qf.display_func = move(display_func);
535 qf.queue_spot_holder = move(queue_spot_holder);
537 unique_lock<mutex> lock(queue_lock);
538 frame_queue.push_back(move(qf));
539 queue_changed.notify_all();
544 shared_ptr<Frame> frame_from_pbo(void *contents, size_t width, size_t height)
546 size_t chroma_width = width / 2;
548 const uint8_t *y = (const uint8_t *)contents;
549 const uint8_t *cb = (const uint8_t *)contents + width * height;
550 const uint8_t *cr = (const uint8_t *)contents + width * height + chroma_width * height;
552 shared_ptr<Frame> frame(new Frame);
553 frame->y.reset(new uint8_t[width * height]);
554 frame->cb.reset(new uint8_t[chroma_width * height]);
555 frame->cr.reset(new uint8_t[chroma_width * height]);
556 for (unsigned yy = 0; yy < height; ++yy) {
557 memcpy(frame->y.get() + width * yy, y + width * yy, width);
558 memcpy(frame->cb.get() + chroma_width * yy, cb + chroma_width * yy, chroma_width);
559 memcpy(frame->cr.get() + chroma_width * yy, cr + chroma_width * yy, chroma_width);
561 frame->is_semiplanar = false;
562 frame->width = width;
563 frame->height = height;
564 frame->chroma_subsampling_x = 2;
565 frame->chroma_subsampling_y = 1;
566 frame->pitch_y = width;
567 frame->pitch_chroma = chroma_width;
573 void VideoStream::encode_thread_func()
575 pthread_setname_np(pthread_self(), "VideoStream");
576 QSurface *surface = create_surface();
577 QOpenGLContext *context = create_context(surface);
578 bool ok = make_current(context, surface);
580 fprintf(stderr, "Video stream couldn't get an OpenGL context\n");
587 unique_lock<mutex> lock(queue_lock);
589 // Wait until we have a frame to play.
590 queue_changed.wait(lock, [this]{
591 return !frame_queue.empty();
593 steady_clock::time_point frame_start = frame_queue.front().local_pts;
595 // Now sleep until the frame is supposed to start (the usual case),
596 // _or_ clear_queue() happened.
597 bool aborted = queue_changed.wait_until(lock, frame_start, [this, frame_start]{
598 return frame_queue.empty() || frame_queue.front().local_pts != frame_start;
601 // clear_queue() happened, so don't play this frame after all.
604 qf = move(frame_queue.front());
605 frame_queue.pop_front();
608 if (qf.type == QueuedFrame::ORIGINAL) {
609 // Send the JPEG frame on, unchanged.
610 string jpeg = read_file(filename_for_frame(qf.stream_idx, qf.input_first_pts));
612 av_init_packet(&pkt);
613 pkt.stream_index = 0;
614 pkt.data = (uint8_t *)jpeg.data();
615 pkt.size = jpeg.size();
616 stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
618 last_frame.assign(&jpeg[0], &jpeg[0] + jpeg.size());
619 } else if (qf.type == QueuedFrame::FADED) {
620 glClientWaitSync(qf.fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
622 shared_ptr<Frame> frame = frame_from_pbo(qf.resources->pbo_contents, 1280, 720);
624 // Now JPEG encode it, and send it on to the stream.
625 vector<uint8_t> jpeg = encode_jpeg(frame->y.get(), frame->cb.get(), frame->cr.get(), 1280, 720);
628 av_init_packet(&pkt);
629 pkt.stream_index = 0;
630 pkt.data = (uint8_t *)jpeg.data();
631 pkt.size = jpeg.size();
632 stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
633 last_frame = move(jpeg);
634 } else if (qf.type == QueuedFrame::INTERPOLATED || qf.type == QueuedFrame::FADED_INTERPOLATED) {
635 glClientWaitSync(qf.fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
637 // Send it on to display.
638 shared_ptr<Frame> frame = frame_from_pbo(qf.resources->pbo_contents, 1280, 720);
639 if (qf.display_decoded_func != nullptr) {
640 qf.display_decoded_func(frame);
643 // Now JPEG encode it, and send it on to the stream.
644 vector<uint8_t> jpeg = encode_jpeg(frame->y.get(), frame->cb.get(), frame->cr.get(), 1280, 720);
645 compute_flow->release_texture(qf.flow_tex);
646 if (qf.type != QueuedFrame::FADED_INTERPOLATED) {
647 interpolate->release_texture(qf.output_tex);
648 interpolate->release_texture(qf.cbcr_tex);
652 av_init_packet(&pkt);
653 pkt.stream_index = 0;
654 pkt.data = (uint8_t *)jpeg.data();
655 pkt.size = jpeg.size();
656 stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
657 last_frame = move(jpeg);
658 } else if (qf.type == QueuedFrame::REFRESH) {
660 av_init_packet(&pkt);
661 pkt.stream_index = 0;
662 pkt.data = (uint8_t *)last_frame.data();
663 pkt.size = last_frame.size();
664 stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
668 if (qf.display_func != nullptr) {
674 int VideoStream::write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
676 VideoStream *video_stream = (VideoStream *)opaque;
677 return video_stream->write_packet2(buf, buf_size, type, time);
680 int VideoStream::write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
682 if (type == AVIO_DATA_MARKER_SYNC_POINT || type == AVIO_DATA_MARKER_BOUNDARY_POINT) {
683 seen_sync_markers = true;
684 } else if (type == AVIO_DATA_MARKER_UNKNOWN && !seen_sync_markers) {
685 // We don't know if this is a keyframe or not (the muxer could
686 // avoid marking it), so we just have to make the best of it.
687 type = AVIO_DATA_MARKER_SYNC_POINT;
690 if (type == AVIO_DATA_MARKER_HEADER) {
691 stream_mux_header.append((char *)buf, buf_size);
692 global_httpd->set_header(stream_mux_header);
694 global_httpd->add_data((char *)buf, buf_size, type == AVIO_DATA_MARKER_SYNC_POINT, time, AVRational{ AV_TIME_BASE, 1 });