1 #include "jpeg_frame_view.h"
5 #include "jpeg_destroyer.h"
6 #include "jpeglib_error_wrapper.h"
8 #include "shared/context.h"
9 #include "shared/metrics.h"
10 #include "shared/post_to_main_thread.h"
11 #include "video_stream.h"
12 #include "ycbcr_converter.h"
14 #include <QMouseEvent>
18 #include <condition_variable>
21 #include <movit/init.h>
22 #include <movit/resource_pool.h>
23 #include <movit/util.h>
30 // Must come after the Qt stuff.
31 #include "vaapi_jpeg_decoder.h"
33 using namespace movit;
35 using namespace std::chrono;
39 // Just an arbitrary order for std::map.
40 struct FrameOnDiskLexicalOrder {
41 bool operator()(const FrameOnDisk &a, const FrameOnDisk &b) const
45 if (a.offset != b.offset)
46 return a.offset < b.offset;
47 if (a.filename_idx != b.filename_idx)
48 return a.filename_idx < b.filename_idx;
49 assert(a.size == b.size);
54 inline size_t frame_size(const Frame &frame)
56 size_t y_size = frame.width * frame.height;
57 size_t cbcr_size = y_size / frame.chroma_subsampling_x / frame.chroma_subsampling_y;
58 return y_size + cbcr_size * 2;
62 shared_ptr<Frame> frame;
66 // There can be multiple JPEGFrameView instances, so make all the metrics static.
67 once_flag jpeg_metrics_inited;
68 atomic<int64_t> metric_jpeg_cache_used_bytes{ 0 }; // Same value as cache_bytes_used.
69 atomic<int64_t> metric_jpeg_cache_limit_bytes{ size_t(CACHE_SIZE_MB) * 1024 * 1024 };
70 atomic<int64_t> metric_jpeg_cache_given_up_frames{ 0 };
71 atomic<int64_t> metric_jpeg_cache_hit_frames{ 0 };
72 atomic<int64_t> metric_jpeg_cache_miss_frames{ 0 };
73 atomic<int64_t> metric_jpeg_software_decode_frames{ 0 };
74 atomic<int64_t> metric_jpeg_software_fail_frames{ 0 };
75 atomic<int64_t> metric_jpeg_vaapi_decode_frames{ 0 };
76 atomic<int64_t> metric_jpeg_vaapi_fail_frames{ 0 };
77 atomic<int64_t> metric_jpeg_prepared_frames{ 0 };
78 atomic<int64_t> metric_jpeg_displayed_frames{ 0 };
79 Summary metric_jpeg_decode_time_seconds;
84 map<FrameOnDisk, LRUFrame, FrameOnDiskLexicalOrder> cache; // Under cache_mu.
85 size_t cache_bytes_used = 0; // Under cache_mu.
86 atomic<size_t> event_counter{ 0 };
87 extern QGLWidget *global_share_widget;
88 extern atomic<bool> should_quit;
90 shared_ptr<Frame> decode_jpeg(const string &jpeg)
92 steady_clock::time_point start = steady_clock::now();
93 shared_ptr<Frame> frame;
94 if (vaapi_jpeg_decoding_usable) {
95 frame = decode_jpeg_vaapi(jpeg);
96 if (frame != nullptr) {
97 ++metric_jpeg_vaapi_decode_frames;
98 steady_clock::time_point stop = steady_clock::now();
99 metric_jpeg_decode_time_seconds.count_event(duration<double>(stop - start).count());
102 fprintf(stderr, "VA-API hardware decoding failed; falling back to software.\n");
103 ++metric_jpeg_vaapi_fail_frames;
106 frame.reset(new Frame);
108 jpeg_decompress_struct dinfo;
109 JPEGWrapErrorManager error_mgr(&dinfo);
110 if (!error_mgr.run([&dinfo] { jpeg_create_decompress(&dinfo); })) {
111 return get_black_frame();
113 JPEGDestroyer destroy_dinfo(&dinfo);
115 if (!error_mgr.run([&dinfo, &jpeg] {
116 jpeg_mem_src(&dinfo, reinterpret_cast<const unsigned char *>(jpeg.data()), jpeg.size());
117 jpeg_read_header(&dinfo, true);
119 return get_black_frame();
122 jpeg_save_markers(&dinfo, JPEG_APP0 + 1, 0xFFFF);
124 if (dinfo.num_components != 3) {
125 fprintf(stderr, "Not a color JPEG. (%d components, Y=%dx%d, Cb=%dx%d, Cr=%dx%d)\n",
126 dinfo.num_components,
127 dinfo.comp_info[0].h_samp_factor, dinfo.comp_info[0].v_samp_factor,
128 dinfo.comp_info[1].h_samp_factor, dinfo.comp_info[1].v_samp_factor,
129 dinfo.comp_info[2].h_samp_factor, dinfo.comp_info[2].v_samp_factor);
130 return get_black_frame();
132 if (dinfo.comp_info[0].h_samp_factor != dinfo.max_h_samp_factor ||
133 dinfo.comp_info[0].v_samp_factor != dinfo.max_v_samp_factor || // Y' must not be subsampled.
134 dinfo.comp_info[1].h_samp_factor != dinfo.comp_info[2].h_samp_factor ||
135 dinfo.comp_info[1].v_samp_factor != dinfo.comp_info[2].v_samp_factor || // Cb and Cr must be identically subsampled.
136 (dinfo.max_h_samp_factor % dinfo.comp_info[1].h_samp_factor) != 0 ||
137 (dinfo.max_v_samp_factor % dinfo.comp_info[1].v_samp_factor) != 0) { // No 2:3 subsampling or other weirdness.
138 fprintf(stderr, "Unsupported subsampling scheme. (Y=%dx%d, Cb=%dx%d, Cr=%dx%d)\n",
139 dinfo.comp_info[0].h_samp_factor, dinfo.comp_info[0].v_samp_factor,
140 dinfo.comp_info[1].h_samp_factor, dinfo.comp_info[1].v_samp_factor,
141 dinfo.comp_info[2].h_samp_factor, dinfo.comp_info[2].v_samp_factor);
144 dinfo.raw_data_out = true;
146 if (!error_mgr.run([&dinfo] {
147 jpeg_start_decompress(&dinfo);
149 return get_black_frame();
152 frame->width = dinfo.output_width;
153 frame->height = dinfo.output_height;
154 frame->chroma_subsampling_x = dinfo.max_h_samp_factor / dinfo.comp_info[1].h_samp_factor;
155 frame->chroma_subsampling_y = dinfo.max_v_samp_factor / dinfo.comp_info[1].v_samp_factor;
157 unsigned h_mcu_size = DCTSIZE * dinfo.max_h_samp_factor;
158 unsigned v_mcu_size = DCTSIZE * dinfo.max_v_samp_factor;
159 unsigned mcu_width_blocks = (dinfo.output_width + h_mcu_size - 1) / h_mcu_size;
160 unsigned mcu_height_blocks = (dinfo.output_height + v_mcu_size - 1) / v_mcu_size;
162 unsigned luma_width_blocks = mcu_width_blocks * dinfo.comp_info[0].h_samp_factor;
163 unsigned chroma_width_blocks = mcu_width_blocks * dinfo.comp_info[1].h_samp_factor;
165 PBO pbo = global_pbo_pool->alloc_pbo();
166 size_t cb_offset = dinfo.image_width * dinfo.image_height;
167 size_t cr_offset = cb_offset + (dinfo.image_width / 2) * dinfo.image_height;
168 uint8_t *y_pix = pbo.ptr;
169 uint8_t *cb_pix = pbo.ptr + cb_offset;
170 uint8_t *cr_pix = pbo.ptr + cr_offset;
171 unsigned pitch_y = luma_width_blocks * DCTSIZE;
172 unsigned pitch_chroma = chroma_width_blocks * DCTSIZE * 2;
174 if (dinfo.marker_list != nullptr &&
175 dinfo.marker_list->marker == JPEG_APP0 + 1 &&
176 dinfo.marker_list->data_length >= 4 &&
177 memcmp(dinfo.marker_list->data, "Exif", 4) == 0) {
178 frame->exif_data.assign(reinterpret_cast<char *>(dinfo.marker_list->data),
179 dinfo.marker_list->data_length);
182 if (!error_mgr.run([&dinfo, &y_pix, &cb_pix, &cr_pix, pitch_y, pitch_chroma, v_mcu_size, mcu_height_blocks] {
183 JSAMPROW yptr[v_mcu_size], cbptr[v_mcu_size], crptr[v_mcu_size];
184 JSAMPARRAY data[3] = { yptr, cbptr, crptr };
185 for (unsigned y = 0; y < mcu_height_blocks; ++y) {
186 // NOTE: The last elements of cbptr/crptr will be unused for vertically subsampled chroma.
187 for (unsigned yy = 0; yy < v_mcu_size; ++yy) {
188 yptr[yy] = y_pix + (y * DCTSIZE * dinfo.max_v_samp_factor + yy) * pitch_y;
189 cbptr[yy] = cb_pix + (y * DCTSIZE * dinfo.comp_info[1].v_samp_factor + yy) * pitch_chroma;
190 crptr[yy] = cr_pix + (y * DCTSIZE * dinfo.comp_info[1].v_samp_factor + yy) * pitch_chroma;
193 jpeg_read_raw_data(&dinfo, data, v_mcu_size);
196 (void)jpeg_finish_decompress(&dinfo);
198 return get_black_frame();
201 // FIXME: what about resolutions that are not divisible by the block factor?
202 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, pbo.pbo);
203 frame->y = create_texture_2d(frame->width, frame->height, GL_R8, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET(0));
204 frame->cb = create_texture_2d(frame->width / 2, frame->height, GL_R8, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET(cb_offset));
205 frame->cr = create_texture_2d(frame->width / 2, frame->height, GL_R8, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET(cr_offset));
206 glBindBuffer(GL_PIXEL_UNPACK_BUFFER, 0);
208 glFlushMappedNamedBufferRange(pbo.pbo, 0, dinfo.image_width * dinfo.image_height * 2);
209 glMemoryBarrier(GL_PIXEL_BUFFER_BARRIER_BIT);
210 pbo.upload_done = RefCountedGLsync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
211 frame->uploaded_ui_thread = pbo.upload_done;
212 frame->uploaded_interpolation = pbo.upload_done;
213 global_pbo_pool->release_pbo(move(pbo));
215 ++metric_jpeg_software_decode_frames;
216 steady_clock::time_point stop = steady_clock::now();
217 metric_jpeg_decode_time_seconds.count_event(duration<double>(stop - start).count());
223 // Assumes cache_mu is held.
224 int64_t bytes_still_to_remove = cache_bytes_used - (size_t(CACHE_SIZE_MB) * 1024 * 1024) * 9 / 10;
225 if (bytes_still_to_remove <= 0)
228 vector<pair<size_t, size_t>> lru_timestamps_and_size;
229 for (const auto &key_and_value : cache) {
230 lru_timestamps_and_size.emplace_back(
231 key_and_value.second.last_used,
232 frame_size(*key_and_value.second.frame));
234 sort(lru_timestamps_and_size.begin(), lru_timestamps_and_size.end());
236 // Remove the oldest ones until we are below 90% of the cache used.
237 size_t lru_cutoff_point = 0;
238 for (const pair<size_t, size_t> &it : lru_timestamps_and_size) {
239 lru_cutoff_point = it.first;
240 bytes_still_to_remove -= it.second;
241 if (bytes_still_to_remove <= 0)
245 for (auto it = cache.begin(); it != cache.end();) {
246 if (it->second.last_used <= lru_cutoff_point) {
247 cache_bytes_used -= frame_size(*it->second.frame);
248 metric_jpeg_cache_used_bytes = cache_bytes_used;
249 it = cache.erase(it);
256 shared_ptr<Frame> decode_jpeg_with_cache(FrameOnDisk frame_spec, CacheMissBehavior cache_miss_behavior, FrameReader *frame_reader, bool *did_decode)
260 lock_guard<mutex> lock(cache_mu);
261 auto it = cache.find(frame_spec);
262 if (it != cache.end()) {
263 ++metric_jpeg_cache_hit_frames;
264 it->second.last_used = event_counter++;
265 return it->second.frame;
269 if (cache_miss_behavior == RETURN_NULLPTR_IF_NOT_IN_CACHE) {
270 ++metric_jpeg_cache_given_up_frames;
274 ++metric_jpeg_cache_miss_frames;
277 shared_ptr<Frame> frame = decode_jpeg(frame_reader->read_frame(frame_spec, /*read_video=*/true, /*read_audio=*/false).video);
279 lock_guard<mutex> lock(cache_mu);
280 cache_bytes_used += frame_size(*frame);
281 metric_jpeg_cache_used_bytes = cache_bytes_used;
282 cache[frame_spec] = LRUFrame{ frame, event_counter++ };
284 if (cache_bytes_used > size_t(CACHE_SIZE_MB) * 1024 * 1024) {
290 void JPEGFrameView::jpeg_decoder_thread_func()
292 size_t num_decoded = 0, num_dropped = 0;
294 pthread_setname_np(pthread_self(), "JPEGDecoder");
295 QSurface *surface = create_surface();
296 QOpenGLContext *context = create_context(surface);
297 bool ok = make_current(context, surface);
299 fprintf(stderr, "Video stream couldn't get an OpenGL context\n");
302 while (!should_quit.load()) {
303 PendingDecode decode;
304 CacheMissBehavior cache_miss_behavior = DECODE_IF_NOT_IN_CACHE;
306 unique_lock<mutex> lock(cache_mu); // TODO: Perhaps under another lock?
307 any_pending_decodes.wait(lock, [this] {
308 return !pending_decodes.empty() || should_quit.load();
310 if (should_quit.load())
312 decode = pending_decodes.front();
313 pending_decodes.pop_front();
315 if (pending_decodes.size() > 3) {
316 cache_miss_behavior = RETURN_NULLPTR_IF_NOT_IN_CACHE;
320 if (decode.frame != nullptr) {
321 // Already decoded, so just show it.
322 setDecodedFrame(decode.frame, nullptr, 1.0f);
326 shared_ptr<Frame> primary_frame, secondary_frame;
328 for (int subframe_idx = 0; subframe_idx < 2; ++subframe_idx) {
329 const FrameOnDisk &frame_spec = (subframe_idx == 0 ? decode.primary : decode.secondary);
330 if (frame_spec.pts == -1) {
331 // No secondary frame.
336 shared_ptr<Frame> frame = decode_jpeg_with_cache(frame_spec, cache_miss_behavior, &frame_reader, &found_in_cache);
338 if (frame == nullptr) {
339 assert(cache_miss_behavior == RETURN_NULLPTR_IF_NOT_IN_CACHE);
344 if (!found_in_cache) {
346 if (num_decoded % 1000 == 0) {
347 fprintf(stderr, "Decoded %zu images, dropped %zu (%.2f%% dropped)\n",
348 num_decoded, num_dropped, (100.0 * num_dropped) / (num_decoded + num_dropped));
351 if (subframe_idx == 0) {
352 primary_frame = std::move(frame);
354 secondary_frame = std::move(frame);
362 // TODO: Could we get jitter between non-interpolated and interpolated frames here?
363 setDecodedFrame(primary_frame, secondary_frame, decode.fade_alpha);
367 JPEGFrameView::~JPEGFrameView()
369 any_pending_decodes.notify_all();
370 jpeg_decoder_thread.join();
373 JPEGFrameView::JPEGFrameView(QWidget *parent)
374 : QGLWidget(parent, global_share_widget)
376 call_once(jpeg_metrics_inited, [] {
377 global_metrics.add("jpeg_cache_used_bytes", &metric_jpeg_cache_used_bytes, Metrics::TYPE_GAUGE);
378 global_metrics.add("jpeg_cache_limit_bytes", &metric_jpeg_cache_limit_bytes, Metrics::TYPE_GAUGE);
379 global_metrics.add("jpeg_cache_frames", { { "action", "given_up" } }, &metric_jpeg_cache_given_up_frames);
380 global_metrics.add("jpeg_cache_frames", { { "action", "hit" } }, &metric_jpeg_cache_hit_frames);
381 global_metrics.add("jpeg_cache_frames", { { "action", "miss" } }, &metric_jpeg_cache_miss_frames);
382 global_metrics.add("jpeg_decode_frames", { { "decoder", "software" }, { "result", "decode" } }, &metric_jpeg_software_decode_frames);
383 global_metrics.add("jpeg_decode_frames", { { "decoder", "software" }, { "result", "fail" } }, &metric_jpeg_software_fail_frames);
384 global_metrics.add("jpeg_decode_frames", { { "decoder", "vaapi" }, { "result", "decode" } }, &metric_jpeg_vaapi_decode_frames);
385 global_metrics.add("jpeg_decode_frames", { { "decoder", "vaapi" }, { "result", "fail" } }, &metric_jpeg_vaapi_fail_frames);
386 global_metrics.add("jpeg_frames", { { "action", "prepared" } }, &metric_jpeg_prepared_frames);
387 global_metrics.add("jpeg_frames", { { "action", "displayed" } }, &metric_jpeg_displayed_frames);
388 vector<double> quantiles{ 0.01, 0.1, 0.25, 0.5, 0.75, 0.9, 0.99 };
389 metric_jpeg_decode_time_seconds.init(quantiles, 60.0);
390 global_metrics.add("jpeg_decode_time_seconds", &metric_jpeg_decode_time_seconds);
394 void JPEGFrameView::setFrame(unsigned stream_idx, FrameOnDisk frame, FrameOnDisk secondary_frame, float fade_alpha)
396 current_stream_idx = stream_idx; // TODO: Does this interact with fades?
398 lock_guard<mutex> lock(cache_mu);
399 PendingDecode decode;
400 decode.primary = frame;
401 decode.secondary = secondary_frame;
402 decode.fade_alpha = fade_alpha;
403 pending_decodes.push_back(decode);
404 any_pending_decodes.notify_all();
407 void JPEGFrameView::setFrame(shared_ptr<Frame> frame)
409 lock_guard<mutex> lock(cache_mu);
410 PendingDecode decode;
411 decode.frame = std::move(frame);
412 pending_decodes.push_back(decode);
413 any_pending_decodes.notify_all();
416 void JPEGFrameView::initializeGL()
421 glDisable(GL_DEPTH_TEST);
424 resource_pool = new ResourcePool;
425 jpeg_decoder_thread = std::thread(&JPEGFrameView::jpeg_decoder_thread_func, this);
427 ycbcr_converter.reset(new YCbCrConverter(YCbCrConverter::OUTPUT_TO_RGBA, resource_pool));
429 ImageFormat inout_format;
430 inout_format.color_space = COLORSPACE_sRGB;
431 inout_format.gamma_curve = GAMMA_sRGB;
433 overlay_chain.reset(new EffectChain(overlay_base_width, overlay_base_height, resource_pool));
434 overlay_input = (movit::FlatInput *)overlay_chain->add_input(new FlatInput(inout_format, FORMAT_GRAYSCALE, GL_UNSIGNED_BYTE, overlay_base_width, overlay_base_height));
436 overlay_chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
437 overlay_chain->finalize();
440 void JPEGFrameView::resizeGL(int width, int height)
443 glViewport(0, 0, width, height);
446 // Save these, as width() and height() will lie with DPI scaling.
451 void JPEGFrameView::paintGL()
453 glViewport(0, 0, gl_width, gl_height);
454 if (current_frame == nullptr) {
455 glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
456 glClear(GL_COLOR_BUFFER_BIT);
460 if (!displayed_this_frame) {
461 ++metric_jpeg_displayed_frames;
462 displayed_this_frame = true;
464 if (current_frame->uploaded_ui_thread != nullptr) {
465 glWaitSync(current_frame->uploaded_ui_thread.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
466 current_frame->uploaded_ui_thread.reset();
468 if (current_secondary_frame != nullptr && current_secondary_frame->uploaded_ui_thread != nullptr) {
469 glWaitSync(current_secondary_frame->uploaded_ui_thread.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
470 current_secondary_frame->uploaded_ui_thread.reset();
474 current_chain->render_to_screen();
476 if (overlay_image != nullptr) {
477 if (overlay_input_needs_refresh) {
478 overlay_input->set_width(overlay_width);
479 overlay_input->set_height(overlay_height);
480 overlay_input->set_pixel_data(overlay_image->bits());
481 overlay_input_needs_refresh = false;
483 glViewport(gl_width - overlay_width, 0, overlay_width, overlay_height);
484 overlay_chain->render_to_screen();
492 void JPEGFrameView::setDecodedFrame(shared_ptr<Frame> frame, shared_ptr<Frame> secondary_frame, float fade_alpha)
494 post_to_main_thread([this, frame, secondary_frame, fade_alpha] {
495 current_frame = frame;
496 current_secondary_frame = secondary_frame;
498 if (secondary_frame != nullptr) {
499 current_chain = ycbcr_converter->prepare_chain_for_fade(frame, secondary_frame, fade_alpha);
501 current_chain = ycbcr_converter->prepare_chain_for_conversion(frame);
503 ++metric_jpeg_prepared_frames;
504 displayed_this_frame = false;
509 void JPEGFrameView::mousePressEvent(QMouseEvent *event)
511 if (event->type() == QEvent::MouseButtonPress && event->button() == Qt::LeftButton) {
516 void JPEGFrameView::set_overlay(const string &text)
519 overlay_image.reset();
523 // Figure out how large the texture needs to be.
525 QImage img(overlay_width, overlay_height, QImage::Format_Grayscale8);
526 QPainter painter(&img);
527 QFont font = painter.font();
528 font.setPointSize(12);
529 QFontMetrics metrics(font);
530 overlay_base_width = lrint(metrics.boundingRect(QString::fromStdString(text)).width() + 8.0);
531 overlay_base_height = lrint(metrics.height());
534 float dpr = QGuiApplication::primaryScreen()->devicePixelRatio();
535 overlay_width = lrint(overlay_base_width * dpr);
536 overlay_height = lrint(overlay_base_height * dpr);
538 // Work around OpenGL alignment issues.
539 while (overlay_width % 4 != 0) ++overlay_width;
541 // Now do the actual drawing.
542 overlay_image.reset(new QImage(overlay_width, overlay_height, QImage::Format_Grayscale8));
543 overlay_image->setDevicePixelRatio(dpr);
544 overlay_image->fill(0);
545 QPainter painter(overlay_image.get());
547 painter.setPen(Qt::white);
548 QFont font = painter.font();
549 font.setPointSize(12);
550 painter.setFont(font);
552 painter.drawText(QRectF(0, 0, overlay_base_width, overlay_base_height), Qt::AlignCenter, QString::fromStdString(text));
554 // Don't refresh immediately; we might not have an OpenGL context here.
555 overlay_input_needs_refresh = true;
558 shared_ptr<Frame> get_black_frame()
560 static shared_ptr<Frame> black_frame;
561 static once_flag flag;
563 // Not really black, but whatever. :-)
564 uint8_t black[] = { 0, 0, 0, 255 };
565 RefCountedTexture black_tex = create_texture_2d(1, 1, GL_RGBA8, GL_RGBA, GL_UNSIGNED_BYTE, black);
567 black_frame->y = black_tex;
568 black_frame->cb = black_tex;
569 black_frame->cr = move(black_tex);
570 black_frame->width = 1;
571 black_frame->height = 1;
572 black_frame->chroma_subsampling_x = 1;
573 black_frame->chroma_subsampling_y = 1;
575 ++metric_jpeg_software_fail_frames;