1 #include "video_stream.h"
4 #include <libavformat/avformat.h>
5 #include <libavformat/avio.h>
11 #include "chroma_subsampler.h"
15 #include "jpeg_frame_view.h"
16 #include "movit/util.h"
20 #include "ycbcr_converter.h"
22 #include <epoxy/glx.h>
26 extern HTTPD *global_httpd;
30 string read_file(const string &filename)
32 FILE *fp = fopen(filename.c_str(), "rb");
34 perror(filename.c_str());
38 fseek(fp, 0, SEEK_END);
44 fread(&ret[0], len, 1, fp);
51 struct VectorDestinationManager {
52 jpeg_destination_mgr pub;
53 std::vector<uint8_t> dest;
55 VectorDestinationManager()
57 pub.init_destination = init_destination_thunk;
58 pub.empty_output_buffer = empty_output_buffer_thunk;
59 pub.term_destination = term_destination_thunk;
62 static void init_destination_thunk(j_compress_ptr ptr)
64 ((VectorDestinationManager *)(ptr->dest))->init_destination();
67 inline void init_destination()
72 static boolean empty_output_buffer_thunk(j_compress_ptr ptr)
74 return ((VectorDestinationManager *)(ptr->dest))->empty_output_buffer();
77 inline bool empty_output_buffer()
79 make_room(dest.size()); // Should ignore pub.free_in_buffer!
83 inline void make_room(size_t bytes_used)
85 dest.resize(bytes_used + 4096);
86 dest.resize(dest.capacity());
87 pub.next_output_byte = dest.data() + bytes_used;
88 pub.free_in_buffer = dest.size() - bytes_used;
91 static void term_destination_thunk(j_compress_ptr ptr)
93 ((VectorDestinationManager *)(ptr->dest))->term_destination();
96 inline void term_destination()
98 dest.resize(dest.size() - pub.free_in_buffer);
101 static_assert(std::is_standard_layout<VectorDestinationManager>::value, "");
103 vector<uint8_t> encode_jpeg(const uint8_t *y_data, const uint8_t *cb_data, const uint8_t *cr_data, unsigned width, unsigned height)
105 VectorDestinationManager dest;
107 jpeg_compress_struct cinfo;
109 cinfo.err = jpeg_std_error(&jerr);
110 jpeg_create_compress(&cinfo);
112 cinfo.dest = (jpeg_destination_mgr *)&dest;
113 cinfo.input_components = 3;
114 cinfo.in_color_space = JCS_RGB;
115 jpeg_set_defaults(&cinfo);
116 constexpr int quality = 90;
117 jpeg_set_quality(&cinfo, quality, /*force_baseline=*/false);
119 cinfo.image_width = width;
120 cinfo.image_height = height;
121 cinfo.raw_data_in = true;
122 jpeg_set_colorspace(&cinfo, JCS_YCbCr);
123 cinfo.comp_info[0].h_samp_factor = 2;
124 cinfo.comp_info[0].v_samp_factor = 1;
125 cinfo.comp_info[1].h_samp_factor = 1;
126 cinfo.comp_info[1].v_samp_factor = 1;
127 cinfo.comp_info[2].h_samp_factor = 1;
128 cinfo.comp_info[2].v_samp_factor = 1;
129 cinfo.CCIR601_sampling = true; // Seems to be mostly ignored by libjpeg, though.
130 jpeg_start_compress(&cinfo, true);
132 JSAMPROW yptr[8], cbptr[8], crptr[8];
133 JSAMPARRAY data[3] = { yptr, cbptr, crptr };
134 for (unsigned y = 0; y < height; y += 8) {
135 for (unsigned yy = 0; yy < 8; ++yy) {
136 yptr[yy] = const_cast<JSAMPROW>(&y_data[(y + yy) * width]);
137 cbptr[yy] = const_cast<JSAMPROW>(&cb_data[(y + yy) * width/2]);
138 crptr[yy] = const_cast<JSAMPROW>(&cr_data[(y + yy) * width/2]);
141 jpeg_write_raw_data(&cinfo, data, /*num_lines=*/8);
144 jpeg_finish_compress(&cinfo);
145 jpeg_destroy_compress(&cinfo);
147 return move(dest.dest);
150 VideoStream::VideoStream()
152 ycbcr_converter.reset(new YCbCrConverter(YCbCrConverter::OUTPUT_TO_DUAL_YCBCR, /*resource_pool=*/nullptr));
153 ycbcr_semiplanar_converter.reset(new YCbCrConverter(YCbCrConverter::OUTPUT_TO_SEMIPLANAR, /*resource_pool=*/nullptr));
155 GLuint input_tex[num_interpolate_slots], gray_tex[num_interpolate_slots];
156 GLuint fade_y_output_tex[num_interpolate_slots], fade_cbcr_output_tex[num_interpolate_slots];
157 GLuint cb_tex[num_interpolate_slots], cr_tex[num_interpolate_slots];
159 glCreateTextures(GL_TEXTURE_2D_ARRAY, 10, input_tex);
160 glCreateTextures(GL_TEXTURE_2D_ARRAY, 10, gray_tex);
161 glCreateTextures(GL_TEXTURE_2D, 10, fade_y_output_tex);
162 glCreateTextures(GL_TEXTURE_2D, 10, fade_cbcr_output_tex);
163 glCreateTextures(GL_TEXTURE_2D, 10, cb_tex);
164 glCreateTextures(GL_TEXTURE_2D, 10, cr_tex);
167 constexpr size_t width = 1280, height = 720; // FIXME: adjustable width, height
168 int levels = find_num_levels(width, height);
169 for (size_t i = 0; i < num_interpolate_slots; ++i) {
170 glTextureStorage3D(input_tex[i], levels, GL_RGBA8, width, height, 2);
172 glTextureStorage3D(gray_tex[i], levels, GL_R8, width, height, 2);
174 glTextureStorage2D(fade_y_output_tex[i], 1, GL_R8, width, height);
176 glTextureStorage2D(fade_cbcr_output_tex[i], 1, GL_RG8, width, height);
178 glTextureStorage2D(cb_tex[i], 1, GL_R8, width / 2, height);
180 glTextureStorage2D(cr_tex[i], 1, GL_R8, width / 2, height);
183 InterpolatedFrameResources resource;
184 resource.input_tex = input_tex[i];
185 resource.gray_tex = gray_tex[i];
186 resource.fade_y_output_tex = fade_y_output_tex[i];
187 resource.fade_cbcr_output_tex = fade_cbcr_output_tex[i];
188 resource.cb_tex = cb_tex[i];
189 resource.cr_tex = cr_tex[i];
190 glCreateFramebuffers(2, resource.input_fbos);
192 glCreateFramebuffers(1, &resource.fade_fbo);
195 glNamedFramebufferTextureLayer(resource.input_fbos[0], GL_COLOR_ATTACHMENT0, input_tex[i], 0, 0);
197 glNamedFramebufferTextureLayer(resource.input_fbos[0], GL_COLOR_ATTACHMENT1, gray_tex[i], 0, 0);
199 glNamedFramebufferTextureLayer(resource.input_fbos[1], GL_COLOR_ATTACHMENT0, input_tex[i], 0, 1);
201 glNamedFramebufferTextureLayer(resource.input_fbos[1], GL_COLOR_ATTACHMENT1, gray_tex[i], 0, 1);
203 glNamedFramebufferTexture(resource.fade_fbo, GL_COLOR_ATTACHMENT0, fade_y_output_tex[i], 0);
205 glNamedFramebufferTexture(resource.fade_fbo, GL_COLOR_ATTACHMENT1, fade_cbcr_output_tex[i], 0);
208 GLuint bufs[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 };
209 glNamedFramebufferDrawBuffers(resource.input_fbos[0], 2, bufs);
211 glNamedFramebufferDrawBuffers(resource.input_fbos[1], 2, bufs);
213 glNamedFramebufferDrawBuffers(resource.fade_fbo, 2, bufs);
216 glCreateBuffers(1, &resource.pbo);
218 glNamedBufferStorage(resource.pbo, width * height * 4, nullptr, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
220 resource.pbo_contents = glMapNamedBufferRange(resource.pbo, 0, width * height * 4, GL_MAP_READ_BIT | GL_MAP_PERSISTENT_BIT);
221 interpolate_resources.push_back(resource);
226 compute_flow.reset(new DISComputeFlow(width, height, operating_point2));
227 interpolate.reset(new Interpolate(operating_point2, /*split_ycbcr_output=*/true));
228 interpolate_no_split.reset(new Interpolate(operating_point2, /*split_ycbcr_output=*/false));
229 chroma_subsampler.reset(new ChromaSubsampler);
232 // The “last frame” is initially black.
233 unique_ptr<uint8_t[]> y(new uint8_t[1280 * 720]);
234 unique_ptr<uint8_t[]> cb_or_cr(new uint8_t[640 * 720]);
235 memset(y.get(), 16, 1280 * 720);
236 memset(cb_or_cr.get(), 128, 640 * 720);
237 last_frame = encode_jpeg(y.get(), cb_or_cr.get(), cb_or_cr.get(), 1280, 720);
240 VideoStream::~VideoStream() {}
242 void VideoStream::start()
244 AVFormatContext *avctx = avformat_alloc_context();
245 avctx->oformat = av_guess_format("nut", nullptr, nullptr);
247 uint8_t *buf = (uint8_t *)av_malloc(MUX_BUFFER_SIZE);
248 avctx->pb = avio_alloc_context(buf, MUX_BUFFER_SIZE, 1, this, nullptr, nullptr, nullptr);
249 avctx->pb->write_data_type = &VideoStream::write_packet2_thunk;
250 avctx->pb->ignore_boundary_point = 1;
252 Mux::Codec video_codec = Mux::CODEC_MJPEG;
254 avctx->flags = AVFMT_FLAG_CUSTOM_IO;
256 string video_extradata;
258 constexpr int width = 1280, height = 720; // Doesn't matter for MJPEG.
259 stream_mux.reset(new Mux(avctx, width, height, video_codec, video_extradata, /*audio_codec_parameters=*/nullptr, COARSE_TIMEBASE,
260 /*write_callback=*/nullptr, Mux::WRITE_FOREGROUND, {}));
263 encode_thread = thread(&VideoStream::encode_thread_func, this);
266 void VideoStream::stop()
268 encode_thread.join();
271 void VideoStream::schedule_original_frame(int64_t output_pts, unsigned stream_idx, int64_t input_pts)
273 fprintf(stderr, "output_pts=%ld original input_pts=%ld\n", output_pts, input_pts);
276 qf.type = QueuedFrame::ORIGINAL;
277 qf.output_pts = output_pts;
278 qf.stream_idx = stream_idx;
279 qf.input_first_pts = input_pts;
281 unique_lock<mutex> lock(queue_lock);
282 frame_queue.push_back(qf);
283 queue_nonempty.notify_all();
286 void VideoStream::schedule_faded_frame(int64_t output_pts, unsigned stream_idx, int64_t input_pts, int secondary_stream_idx, int64_t secondary_input_pts, float fade_alpha)
288 fprintf(stderr, "output_pts=%ld faded input_pts=%ld,%ld fade_alpha=%.2f\n", output_pts, input_pts, secondary_input_pts, fade_alpha);
290 // Get the temporary OpenGL resources we need for doing the fade.
291 // (We share these with interpolated frames, which is slightly
292 // overkill, but there's no need to waste resources on keeping
293 // separate pools around.)
294 InterpolatedFrameResources resources;
296 unique_lock<mutex> lock(queue_lock);
297 if (interpolate_resources.empty()) {
298 fprintf(stderr, "WARNING: Too many interpolated frames already in transit; dropping one.\n");
301 resources = interpolate_resources.front();
302 interpolate_resources.pop_front();
308 jpeg_id1.stream_idx = stream_idx;
309 jpeg_id1.pts = input_pts;
310 jpeg_id1.interpolated = false;
311 shared_ptr<Frame> frame1 = decode_jpeg_with_cache(jpeg_id1, DECODE_IF_NOT_IN_CACHE, &did_decode);
314 jpeg_id2.stream_idx = secondary_stream_idx;
315 jpeg_id2.pts = secondary_input_pts;
316 jpeg_id2.interpolated = false;
317 shared_ptr<Frame> frame2 = decode_jpeg_with_cache(jpeg_id2, DECODE_IF_NOT_IN_CACHE, &did_decode);
319 ycbcr_semiplanar_converter->prepare_chain_for_fade(frame1, frame2, fade_alpha)->render_to_fbo(resources.fade_fbo, 1280, 720);
322 qf.type = QueuedFrame::FADED;
323 qf.output_pts = output_pts;
324 qf.stream_idx = stream_idx;
325 qf.resources = resources;
326 qf.input_first_pts = input_pts;
328 qf.secondary_stream_idx = secondary_stream_idx;
329 qf.secondary_input_pts = secondary_input_pts;
331 // Subsample and split Cb/Cr.
332 chroma_subsampler->subsample_chroma(resources.fade_cbcr_output_tex, 1280, 720, resources.cb_tex, resources.cr_tex);
334 // Read it down (asynchronously) to the CPU.
335 glPixelStorei(GL_PACK_ROW_LENGTH, 0);
336 glBindBuffer(GL_PIXEL_PACK_BUFFER, resources.pbo);
338 glGetTextureImage(resources.fade_y_output_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 4, BUFFER_OFFSET(0));
340 glGetTextureImage(resources.cb_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3, BUFFER_OFFSET(1280 * 720));
342 glGetTextureImage(resources.cr_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3 - 640 * 720, BUFFER_OFFSET(1280 * 720 + 640 * 720));
344 glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
346 // Set a fence we can wait for to make sure the CPU sees the read.
347 glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
349 qf.fence = RefCountedGLsync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
352 unique_lock<mutex> lock(queue_lock);
353 frame_queue.push_back(qf);
354 queue_nonempty.notify_all();
357 void VideoStream::schedule_interpolated_frame(int64_t output_pts, unsigned stream_idx, int64_t input_first_pts, int64_t input_second_pts, float alpha, int secondary_stream_idx, int64_t secondary_input_pts, float fade_alpha)
359 if (secondary_stream_idx != -1) {
360 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);
362 fprintf(stderr, "output_pts=%ld interpolated input_pts1=%ld input_pts2=%ld alpha=%.3f\n", output_pts, input_first_pts, input_second_pts, alpha);
366 if (secondary_stream_idx == -1) {
367 id = JPEGID{ stream_idx, output_pts, /*interpolated=*/true };
369 id = create_jpegid_for_interpolated_fade(stream_idx, output_pts, secondary_stream_idx, secondary_input_pts);
372 // Get the temporary OpenGL resources we need for doing the interpolation.
373 InterpolatedFrameResources resources;
375 unique_lock<mutex> lock(queue_lock);
376 if (interpolate_resources.empty()) {
377 fprintf(stderr, "WARNING: Too many interpolated frames already in transit; dropping one.\n");
378 JPEGFrameView::insert_interpolated_frame(id, nullptr);
381 resources = interpolate_resources.front();
382 interpolate_resources.pop_front();
386 qf.type = (secondary_stream_idx == -1) ? QueuedFrame::INTERPOLATED : QueuedFrame::FADED_INTERPOLATED;
387 qf.output_pts = output_pts;
388 qf.stream_idx = stream_idx;
389 qf.resources = resources;
394 // Convert frame0 and frame1 to OpenGL textures.
395 for (size_t frame_no = 0; frame_no < 2; ++frame_no) {
397 jpeg_id.stream_idx = stream_idx;
398 jpeg_id.pts = frame_no == 1 ? input_second_pts : input_first_pts;
399 jpeg_id.interpolated = false;
401 shared_ptr<Frame> frame = decode_jpeg_with_cache(jpeg_id, DECODE_IF_NOT_IN_CACHE, &did_decode);
402 ycbcr_converter->prepare_chain_for_conversion(frame)->render_to_fbo(resources.input_fbos[frame_no], 1280, 720);
405 glGenerateTextureMipmap(resources.input_tex);
407 glGenerateTextureMipmap(resources.gray_tex);
410 // Compute the interpolated frame.
411 qf.flow_tex = compute_flow->exec(resources.gray_tex, DISComputeFlow::FORWARD_AND_BACKWARD, DISComputeFlow::DO_NOT_RESIZE_FLOW);
414 if (secondary_stream_idx != -1) {
415 // Fade. First kick off the interpolation.
416 tie(qf.output_tex, ignore) = interpolate_no_split->exec(resources.input_tex, resources.gray_tex, qf.flow_tex, 1280, 720, alpha);
419 // Now decode the image we are fading against.
421 jpeg_id.stream_idx = secondary_stream_idx;
422 jpeg_id.pts = secondary_input_pts;
423 jpeg_id.interpolated = false;
425 shared_ptr<Frame> frame2 = decode_jpeg_with_cache(jpeg_id, DECODE_IF_NOT_IN_CACHE, &did_decode);
427 // Then fade against it, putting it into the fade Y' and CbCr textures.
428 ycbcr_semiplanar_converter->prepare_chain_for_fade_from_texture(qf.output_tex, frame2, fade_alpha)->render_to_fbo(resources.fade_fbo, 1280, 720);
430 // Subsample and split Cb/Cr.
431 chroma_subsampler->subsample_chroma(resources.fade_cbcr_output_tex, 1280, 720, resources.cb_tex, resources.cr_tex);
433 tie(qf.output_tex, qf.cbcr_tex) = interpolate->exec(resources.input_tex, resources.gray_tex, qf.flow_tex, 1280, 720, alpha);
436 // Subsample and split Cb/Cr.
437 chroma_subsampler->subsample_chroma(qf.cbcr_tex, 1280, 720, resources.cb_tex, resources.cr_tex);
441 // We could have released qf.flow_tex here, but to make sure we don't cause a stall
442 // when trying to reuse it for the next frame, we can just as well hold on to it
443 // and release it only when the readback is done.
445 // Read it down (asynchronously) to the CPU.
446 glPixelStorei(GL_PACK_ROW_LENGTH, 0);
447 glBindBuffer(GL_PIXEL_PACK_BUFFER, resources.pbo);
449 if (secondary_stream_idx != -1) {
450 glGetTextureImage(resources.fade_y_output_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 4, BUFFER_OFFSET(0));
452 glGetTextureImage(qf.output_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 4, BUFFER_OFFSET(0));
455 glGetTextureImage(resources.cb_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3, BUFFER_OFFSET(1280 * 720));
457 glGetTextureImage(resources.cr_tex, 0, GL_RED, GL_UNSIGNED_BYTE, 1280 * 720 * 3 - 640 * 720, BUFFER_OFFSET(1280 * 720 + 640 * 720));
459 glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
461 // Set a fence we can wait for to make sure the CPU sees the read.
462 glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
464 qf.fence = RefCountedGLsync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
467 unique_lock<mutex> lock(queue_lock);
468 frame_queue.push_back(qf);
469 queue_nonempty.notify_all();
472 void VideoStream::schedule_refresh_frame(int64_t output_pts)
475 av_init_packet(&pkt);
476 pkt.stream_index = 0;
477 pkt.data = (uint8_t *)last_frame.data();
478 pkt.size = last_frame.size();
479 stream_mux->add_packet(pkt, output_pts, output_pts);
484 shared_ptr<Frame> frame_from_pbo(void *contents, size_t width, size_t height)
486 size_t chroma_width = width / 2;
488 const uint8_t *y = (const uint8_t *)contents;
489 const uint8_t *cb = (const uint8_t *)contents + width * height;
490 const uint8_t *cr = (const uint8_t *)contents + width * height + chroma_width * height;
492 shared_ptr<Frame> frame(new Frame);
493 frame->y.reset(new uint8_t[width * height]);
494 frame->cb.reset(new uint8_t[chroma_width * height]);
495 frame->cr.reset(new uint8_t[chroma_width * height]);
496 for (unsigned yy = 0; yy < height; ++yy) {
497 memcpy(frame->y.get() + width * yy, y + width * yy, width);
498 memcpy(frame->cb.get() + chroma_width * yy, cb + chroma_width * yy, chroma_width);
499 memcpy(frame->cr.get() + chroma_width * yy, cr + chroma_width * yy, chroma_width);
501 frame->is_semiplanar = false;
502 frame->width = width;
503 frame->height = height;
504 frame->chroma_subsampling_x = 2;
505 frame->chroma_subsampling_y = 1;
506 frame->pitch_y = width;
507 frame->pitch_chroma = chroma_width;
513 void VideoStream::encode_thread_func()
515 pthread_setname_np(pthread_self(), "VideoStream");
516 QSurface *surface = create_surface();
517 QOpenGLContext *context = create_context(surface);
518 bool ok = make_current(context, surface);
520 fprintf(stderr, "Video stream couldn't get an OpenGL context\n");
527 unique_lock<mutex> lock(queue_lock);
528 queue_nonempty.wait(lock, [this]{
529 return !frame_queue.empty();
531 qf = frame_queue.front();
532 frame_queue.pop_front();
535 if (qf.type == QueuedFrame::ORIGINAL) {
536 // Send the JPEG frame on, unchanged.
537 string jpeg = read_file(filename_for_frame(qf.stream_idx, qf.input_first_pts));
539 av_init_packet(&pkt);
540 pkt.stream_index = 0;
541 pkt.data = (uint8_t *)jpeg.data();
542 pkt.size = jpeg.size();
543 stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
545 last_frame.assign(&jpeg[0], &jpeg[0] + jpeg.size());
546 } else if (qf.type == QueuedFrame::FADED) {
547 glClientWaitSync(qf.fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
549 shared_ptr<Frame> frame = frame_from_pbo(qf.resources.pbo_contents, 1280, 720);
551 // Now JPEG encode it, and send it on to the stream.
552 vector<uint8_t> jpeg = encode_jpeg(frame->y.get(), frame->cb.get(), frame->cr.get(), 1280, 720);
555 av_init_packet(&pkt);
556 pkt.stream_index = 0;
557 pkt.data = (uint8_t *)jpeg.data();
558 pkt.size = jpeg.size();
559 stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
560 last_frame = move(jpeg);
562 // Put the frame resources back.
563 unique_lock<mutex> lock(queue_lock);
564 interpolate_resources.push_back(qf.resources);
565 } else if (qf.type == QueuedFrame::INTERPOLATED || qf.type == QueuedFrame::FADED_INTERPOLATED) {
566 glClientWaitSync(qf.fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
568 // Send a copy of the frame on to display.
569 shared_ptr<Frame> frame = frame_from_pbo(qf.resources.pbo_contents, 1280, 720);
570 JPEGFrameView::insert_interpolated_frame(qf.id, frame);
572 // Now JPEG encode it, and send it on to the stream.
573 vector<uint8_t> jpeg = encode_jpeg(frame->y.get(), frame->cb.get(), frame->cr.get(), 1280, 720);
574 compute_flow->release_texture(qf.flow_tex);
575 if (qf.type != QueuedFrame::FADED_INTERPOLATED) {
576 interpolate->release_texture(qf.output_tex);
577 interpolate->release_texture(qf.cbcr_tex);
581 av_init_packet(&pkt);
582 pkt.stream_index = 0;
583 pkt.data = (uint8_t *)jpeg.data();
584 pkt.size = jpeg.size();
585 stream_mux->add_packet(pkt, qf.output_pts, qf.output_pts);
586 last_frame = move(jpeg);
588 // Put the frame resources back.
589 unique_lock<mutex> lock(queue_lock);
590 interpolate_resources.push_back(qf.resources);
597 int VideoStream::write_packet2_thunk(void *opaque, uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
599 VideoStream *video_stream = (VideoStream *)opaque;
600 return video_stream->write_packet2(buf, buf_size, type, time);
603 int VideoStream::write_packet2(uint8_t *buf, int buf_size, AVIODataMarkerType type, int64_t time)
605 if (type == AVIO_DATA_MARKER_SYNC_POINT || type == AVIO_DATA_MARKER_BOUNDARY_POINT) {
606 seen_sync_markers = true;
607 } else if (type == AVIO_DATA_MARKER_UNKNOWN && !seen_sync_markers) {
608 // We don't know if this is a keyframe or not (the muxer could
609 // avoid marking it), so we just have to make the best of it.
610 type = AVIO_DATA_MARKER_SYNC_POINT;
613 if (type == AVIO_DATA_MARKER_HEADER) {
614 stream_mux_header.append((char *)buf, buf_size);
615 global_httpd->set_header(stream_mux_header);
617 global_httpd->add_data((char *)buf, buf_size, type == AVIO_DATA_MARKER_SYNC_POINT, time, AVRational{ AV_TIME_BASE, 1 });