git.sesse.net Git - nageru/blob - mixer.cpp

   1 #define WIDTH 1280
   2 #define HEIGHT 720
   3
   4 #undef Success
   5
   6 #include "mixer.h"
   7
   8 #include <assert.h>
   9 #include <effect.h>
  10 #include <effect_chain.h>
  11 #include <effect_util.h>
  12 #include <epoxy/egl.h>
  13 #include <features.h>
  14 #include <image_format.h>
  15 #include <init.h>
  16 #include <overlay_effect.h>
  17 #include <padding_effect.h>
  18 #include <resample_effect.h>
  19 #include <resource_pool.h>
  20 #include <saturation_effect.h>
  21 #include <stdint.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <sys/time.h>
  25 #include <time.h>
  26 #include <util.h>
  27 #include <white_balance_effect.h>
  28 #include <ycbcr.h>
  29 #include <ycbcr_input.h>
  30 #include <cmath>
  31 #include <condition_variable>
  32 #include <cstddef>
  33 #include <memory>
  34 #include <mutex>
  35 #include <string>
  36 #include <thread>
  37 #include <vector>
  38
  39 #include "bmusb.h"
  40 #include "context.h"
  41 #include "h264encode.h"
  42 #include "pbo_frame_allocator.h"
  43 #include "ref_counted_gl_sync.h"
  44
  45 class QOpenGLContext;
  46
  47 using namespace movit;
  48 using namespace std;
  49 using namespace std::placeholders;
  50
  51 Mixer *global_mixer = nullptr;
  52
  53 Mixer::Mixer(const QSurfaceFormat &format)
  54         : mixer_surface(create_surface(format)),
  55           h264_encoder_surface(create_surface(format))
  56 {
  57         CHECK(init_movit(MOVIT_SHADER_DIR, MOVIT_DEBUG_OFF));
  58         check_error();
  59
  60         resource_pool.reset(new ResourcePool);
  61         theme.reset(new Theme("theme.lua", resource_pool.get()));
  62         output_channel[OUTPUT_LIVE].parent = this;
  63         output_channel[OUTPUT_PREVIEW].parent = this;
  64         output_channel[OUTPUT_INPUT0].parent = this;
  65         output_channel[OUTPUT_INPUT1].parent = this;
  66
  67         ImageFormat inout_format;
  68         inout_format.color_space = COLORSPACE_sRGB;
  69         inout_format.gamma_curve = GAMMA_sRGB;
  70
  71         YCbCrFormat input_ycbcr_format;
  72         input_ycbcr_format.chroma_subsampling_x = 2;
  73         input_ycbcr_format.chroma_subsampling_y = 1;
  74         input_ycbcr_format.cb_x_position = 0.0;
  75         input_ycbcr_format.cr_x_position = 0.0;
  76         input_ycbcr_format.cb_y_position = 0.5;
  77         input_ycbcr_format.cr_y_position = 0.5;
  78         input_ycbcr_format.luma_coefficients = YCBCR_REC_601;
  79         input_ycbcr_format.full_range = false;
  80
  81         // Display chain; shows the live output produced by the main chain (its RGBA version).
  82         display_chain.reset(new EffectChain(WIDTH, HEIGHT, resource_pool.get()));
  83         check_error();
  84         display_input = new FlatInput(inout_format, FORMAT_RGB, GL_UNSIGNED_BYTE, WIDTH, HEIGHT);  // FIXME: GL_UNSIGNED_BYTE is really wrong.
  85         display_chain->add_input(display_input);
  86         display_chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
  87         display_chain->set_dither_bits(0);  // Don't bother.
  88         display_chain->finalize();
  89
  90         // Preview chains (always shows just the inputs for now).
  91         preview0_chain.reset(new EffectChain(WIDTH, HEIGHT, resource_pool.get()));
  92         check_error();
  93         preview0_input = new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
  94         preview0_chain->add_input(preview0_input);
  95         preview0_chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
  96         preview0_chain->set_dither_bits(0);  // Don't bother.
  97         preview0_chain->finalize();
  98
  99         preview1_chain.reset(new EffectChain(WIDTH, HEIGHT, resource_pool.get()));
 100         check_error();
 101         preview1_input = new YCbCrInput(inout_format, input_ycbcr_format, WIDTH, HEIGHT, YCBCR_INPUT_SPLIT_Y_AND_CBCR);
 102         preview1_chain->add_input(preview1_input);
 103         preview1_chain->add_output(inout_format, OUTPUT_ALPHA_FORMAT_POSTMULTIPLIED);
 104         preview1_chain->set_dither_bits(0);  // Don't bother.
 105         preview1_chain->finalize();
 106
 107         h264_encoder.reset(new H264Encoder(h264_encoder_surface, WIDTH, HEIGHT, "test.mp4"));
 108
 109         printf("Configuring first card...\n");
 110         cards[0].usb = new BMUSBCapture(0x1edb, 0xbd3b);  // 0xbd4f
 111         cards[0].usb->set_frame_callback(std::bind(&Mixer::bm_frame, this, 0, _1, _2, _3, _4, _5, _6, _7));
 112         cards[0].frame_allocator.reset(new PBOFrameAllocator(1280 * 750 * 2 + 44, 1280, 720));
 113         cards[0].usb->set_video_frame_allocator(cards[0].frame_allocator.get());
 114         cards[0].usb->configure_card();
 115         cards[0].surface = create_surface(format);
 116 #if NUM_CARDS == 2
 117         cards[1].surface = create_surface(format);
 118 #endif
 119
 120         if (NUM_CARDS == 2) {
 121                 printf("Configuring second card...\n");
 122                 cards[1].usb = new BMUSBCapture(0x1edb, 0xbd4f);
 123                 cards[1].usb->set_frame_callback(std::bind(&Mixer::bm_frame, this, 1, _1, _2, _3, _4, _5, _6, _7));
 124                 cards[1].frame_allocator.reset(new PBOFrameAllocator(1280 * 750 * 2 + 44, 1280, 720));
 125                 cards[1].usb->set_video_frame_allocator(cards[1].frame_allocator.get());
 126                 cards[1].usb->configure_card();
 127         }
 128
 129         BMUSBCapture::start_bm_thread();
 130
 131         for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
 132                 cards[card_index].usb->start_bm_capture();
 133         }
 134
 135         //chain->enable_phase_timing(true);
 136
 137         // Set up stuff for NV12 conversion.
 138
 139         // Cb/Cr shader.
 140         string cbcr_vert_shader = read_file("vs-cbcr.130.vert");
 141         string cbcr_frag_shader =
 142                 "#version 130 \n"
 143                 "in vec2 tc0; \n"
 144                 "uniform sampler2D cbcr_tex; \n"
 145                 "void main() { \n"
 146                 "    gl_FragColor = texture2D(cbcr_tex, tc0); \n"
 147                 "} \n";
 148         cbcr_program_num = resource_pool->compile_glsl_program(cbcr_vert_shader, cbcr_frag_shader);
 149 }
 150
 151 Mixer::~Mixer()
 152 {
 153         resource_pool->release_glsl_program(cbcr_program_num);
 154         BMUSBCapture::stop_bm_thread();
 155 }
 156
 157 void Mixer::bm_frame(int card_index, uint16_t timecode,
 158                      FrameAllocator::Frame video_frame, size_t video_offset, uint16_t video_format,
 159                      FrameAllocator::Frame audio_frame, size_t audio_offset, uint16_t audio_format)
 160 {
 161         CaptureCard *card = &cards[card_index];
 162         if (!card->thread_initialized) {
 163                 printf("initializing context for bmusb thread %d\n", card_index);
 164                 eglBindAPI(EGL_OPENGL_API);
 165                 card->context = create_context();
 166                 if (!make_current(card->context, card->surface)) {
 167                         printf("failed to create bmusb context\n");
 168                         exit(1);
 169                 }
 170                 card->thread_initialized = true;
 171         }
 172
 173         if (video_frame.len - video_offset != 1280 * 750 * 2) {
 174                 printf("dropping frame with wrong length (%ld)\n", video_frame.len - video_offset);
 175                 FILE *fp = fopen("frame.raw", "wb");
 176                 fwrite(video_frame.data, video_frame.len, 1, fp);
 177                 fclose(fp);
 178                 //exit(1);
 179                 card->usb->get_video_frame_allocator()->release_frame(video_frame);
 180                 card->usb->get_audio_frame_allocator()->release_frame(audio_frame);
 181                 return;
 182         }
 183         {
 184                 // Wait until the previous frame was consumed.
 185                 std::unique_lock<std::mutex> lock(bmusb_mutex);
 186                 card->new_data_ready_changed.wait(lock, [card]{ return !card->new_data_ready; });
 187         }
 188         const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)video_frame.userdata;
 189         GLuint pbo = userdata->pbo;
 190         check_error();
 191         glBindBuffer(GL_PIXEL_UNPACK_BUFFER_ARB, pbo);
 192         check_error();
 193         glFlushMappedBufferRange(GL_PIXEL_UNPACK_BUFFER, 0, video_frame.size);
 194         check_error();
 195         //glMemoryBarrier(GL_CLIENT_MAPPED_BUFFER_BARRIER_BIT);
 196         //check_error();
 197
 198         // Upload the textures.
 199         glBindTexture(GL_TEXTURE_2D, userdata->tex_y);
 200         check_error();
 201         glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1280, 720, GL_RED, GL_UNSIGNED_BYTE, BUFFER_OFFSET((1280 * 750 * 2 + 44) / 2 + 1280 * 25 + 22));
 202         check_error();
 203         glBindTexture(GL_TEXTURE_2D, userdata->tex_cbcr);
 204         check_error();
 205         glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 1280/2, 720, GL_RG, GL_UNSIGNED_BYTE, BUFFER_OFFSET(1280 * 25 + 22));
 206         check_error();
 207         glBindTexture(GL_TEXTURE_2D, 0);
 208         check_error();
 209         GLsync fence = glFenceSync(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
 210         check_error();
 211         assert(fence != nullptr);
 212         {
 213                 std::unique_lock<std::mutex> lock(bmusb_mutex);
 214                 card->new_data_ready = true;
 215                 card->new_frame = RefCountedFrame(video_frame);
 216                 card->new_data_ready_fence = fence;
 217                 card->new_data_ready_changed.notify_all();
 218         }
 219
 220         // Video frame will be released when last user of card->new_frame goes out of scope.
 221         card->usb->get_audio_frame_allocator()->release_frame(audio_frame);
 222 }
 223
 224 void Mixer::place_rectangle(Effect *resample_effect, Effect *padding_effect, float x0, float y0, float x1, float y1)
 225 {
 226         float srcx0 = 0.0f;
 227         float srcx1 = 1.0f;
 228         float srcy0 = 0.0f;
 229         float srcy1 = 1.0f;
 230
 231         // Cull.
 232         if (x0 > 1280.0 || x1 < 0.0 || y0 > 720.0 || y1 < 0.0) {
 233                 CHECK(resample_effect->set_int("width", 1));
 234                 CHECK(resample_effect->set_int("height", 1));
 235                 CHECK(resample_effect->set_float("zoom_x", 1280.0));
 236                 CHECK(resample_effect->set_float("zoom_y", 720.0));
 237                 CHECK(padding_effect->set_int("left", 2000));
 238                 CHECK(padding_effect->set_int("top", 2000));
 239                 return;
 240         }
 241
 242         // Clip. (TODO: Clip on upper/left sides, too.)
 243         if (x1 > 1280.0) {
 244                 srcx1 = (1280.0 - x0) / (x1 - x0);
 245                 x1 = 1280.0;
 246         }
 247         if (y1 > 720.0) {
 248                 srcy1 = (720.0 - y0) / (y1 - y0);
 249                 y1 = 720.0;
 250         }
 251
 252         float x_subpixel_offset = x0 - floor(x0);
 253         float y_subpixel_offset = y0 - floor(y0);
 254
 255         // Resampling must be to an integral number of pixels. Round up,
 256         // and then add an extra pixel so we have some leeway for the border.
 257         int width = int(ceil(x1 - x0)) + 1;
 258         int height = int(ceil(y1 - y0)) + 1;
 259         CHECK(resample_effect->set_int("width", width));
 260         CHECK(resample_effect->set_int("height", height));
 261
 262         // Correct the discrepancy with zoom. (This will leave a small
 263         // excess edge of pixels and subpixels, which we'll correct for soon.)
 264         float zoom_x = (x1 - x0) / (width * (srcx1 - srcx0));
 265         float zoom_y = (y1 - y0) / (height * (srcy1 - srcy0));
 266         CHECK(resample_effect->set_float("zoom_x", zoom_x));
 267         CHECK(resample_effect->set_float("zoom_y", zoom_y));
 268         CHECK(resample_effect->set_float("zoom_center_x", 0.0f));
 269         CHECK(resample_effect->set_float("zoom_center_y", 0.0f));
 270
 271         // Padding must also be to a whole-pixel offset.
 272         CHECK(padding_effect->set_int("left", floor(x0)));
 273         CHECK(padding_effect->set_int("top", floor(y0)));
 274
 275         // Correct _that_ discrepancy by subpixel offset in the resampling.
 276         CHECK(resample_effect->set_float("left", -x_subpixel_offset / zoom_x));
 277         CHECK(resample_effect->set_float("top", -y_subpixel_offset / zoom_y));
 278
 279         // Finally, adjust the border so it is exactly where we want it.
 280         CHECK(padding_effect->set_float("border_offset_left", x_subpixel_offset));
 281         CHECK(padding_effect->set_float("border_offset_right", x1 - (floor(x0) + width)));
 282         CHECK(padding_effect->set_float("border_offset_top", y_subpixel_offset));
 283         CHECK(padding_effect->set_float("border_offset_bottom", y1 - (floor(y0) + height)));
 284 }
 285
 286 void Mixer::thread_func()
 287 {
 288         eglBindAPI(EGL_OPENGL_API);
 289         QOpenGLContext *context = create_context();
 290         if (!make_current(context, mixer_surface)) {
 291                 printf("oops\n");
 292                 exit(1);
 293         }
 294
 295         struct timespec start, now;
 296         clock_gettime(CLOCK_MONOTONIC, &start);
 297
 298         while (!should_quit) {
 299                 ++frame;
 300
 301                 //int width0 = lrintf(848 * (1.0 + 0.2 * sin(frame * 0.02)));
 302                 int width0 = 848;
 303                 int height0 = lrintf(width0 * 9.0 / 16.0);
 304
 305                 //float top0 = 96 + 48 * sin(frame * 0.005);
 306                 //float left0 = 96 + 48 * cos(frame * 0.006);
 307                 float top0 = 48;
 308                 float left0 = 16;
 309                 float bottom0 = top0 + height0;
 310                 float right0 = left0 + width0;
 311
 312                 int width1 = 384;
 313                 int height1 = 216;
 314
 315                 float bottom1 = 720 - 48;
 316                 float right1 = 1280 - 16;
 317                 float top1 = bottom1 - height1;
 318                 float left1 = right1 - width1;
 319
 320                 if (current_source == SOURCE_INPUT1) {
 321                         top0 = 0.0;
 322                         bottom0 = HEIGHT;
 323                         left0 = 0.0;
 324                         right0 = WIDTH;
 325
 326                         top1 = HEIGHT + 10;
 327                         bottom1 = HEIGHT + 20;
 328                         left1 = WIDTH + 10;
 329                         right1 = WIDTH + 20;
 330                 } else if (current_source == SOURCE_INPUT2) {
 331                         top1 = 0.0;
 332                         bottom1 = HEIGHT;
 333                         left1 = 0.0;
 334                         right1 = WIDTH;
 335
 336                         top0 = HEIGHT + 10;
 337                         bottom0 = HEIGHT + 20;
 338                         left0 = WIDTH + 10;
 339                         right0 = WIDTH + 20;
 340                 } else {
 341                         float t = 0.5 + 0.5 * cos(frame * 0.006);
 342                         float scale0 = 1.0 + t * (1280.0 / 848.0 - 1.0);
 343                         float tx0 = 0.0 + t * (-16.0 * scale0);
 344                         float ty0 = 0.0 + t * (-48.0 * scale0);
 345
 346                         top0 = top0 * scale0 + ty0;
 347                         bottom0 = bottom0 * scale0 + ty0;
 348                         left0 = left0 * scale0 + tx0;
 349                         right0 = right0 * scale0 + tx0;
 350
 351                         top1 = top1 * scale0 + ty0;
 352                         bottom1 = bottom1 * scale0 + ty0;
 353                         left1 = left1 * scale0 + tx0;
 354                         right1 = right1 * scale0 + tx0;
 355                 }
 356
 357 #if 0
 358                 place_rectangle(resample_effect, padding_effect, left0, top0, right0, bottom0);
 359                 place_rectangle(resample2_effect, padding2_effect, left1, top1, right1, bottom1);
 360 #endif
 361
 362                 CaptureCard card_copy[NUM_CARDS];
 363
 364                 {
 365                         std::unique_lock<std::mutex> lock(bmusb_mutex);
 366
 367                         // The first card is the master timer, so wait for it to have a new frame.
 368                         // TODO: Make configurable, and with a timeout.
 369                         cards[0].new_data_ready_changed.wait(lock, [this]{ return cards[0].new_data_ready; });
 370
 371                         for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
 372                                 CaptureCard *card = &cards[card_index];
 373                                 card_copy[card_index].usb = card->usb;
 374                                 card_copy[card_index].new_data_ready = card->new_data_ready;
 375                                 card_copy[card_index].new_frame = card->new_frame;
 376                                 card_copy[card_index].new_data_ready_fence = card->new_data_ready_fence;
 377                                 card->new_data_ready = false;
 378                                 card->new_data_ready_changed.notify_all();
 379                         }
 380                 }
 381
 382                 for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
 383                         CaptureCard *card = &card_copy[card_index];
 384                         if (!card->new_data_ready)
 385                                 continue;
 386
 387                         assert(card->new_frame != nullptr);
 388                         bmusb_current_rendering_frame[card_index] = card->new_frame;
 389                         check_error();
 390
 391                         // The new texture might still be uploaded,
 392                         // tell the GPU to wait until it's there.
 393                         if (card->new_data_ready_fence)
 394                                 glWaitSync(card->new_data_ready_fence, /*flags=*/0, GL_TIMEOUT_IGNORED);
 395                         check_error();
 396                         glDeleteSync(card->new_data_ready_fence);
 397                         check_error();
 398                         const PBOFrameAllocator::Userdata *userdata = (const PBOFrameAllocator::Userdata *)card->new_frame->userdata;
 399                         theme->set_input_textures(card_index, userdata->tex_y, userdata->tex_cbcr);
 400                 }
 401
 402                 // Get the main chain from the theme, and set its state immediately.
 403                 pair<EffectChain *, function<void()>> theme_main_chain = theme->get_chain(0, frame / 60.0f, WIDTH, HEIGHT);
 404                 EffectChain *chain = theme_main_chain.first;
 405                 theme_main_chain.second();
 406
 407                 GLuint y_tex, cbcr_tex;
 408                 bool got_frame = h264_encoder->begin_frame(&y_tex, &cbcr_tex);
 409                 assert(got_frame);
 410
 411                 // Render main chain.
 412                 GLuint cbcr_full_tex = resource_pool->create_2d_texture(GL_RG8, WIDTH, HEIGHT);
 413                 GLuint rgba_tex = resource_pool->create_2d_texture(GL_RGB565, WIDTH, HEIGHT);  // Saves texture bandwidth, although dithering gets messed up.
 414                 GLuint fbo = resource_pool->create_fbo(y_tex, cbcr_full_tex, rgba_tex);
 415                 chain->render_to_fbo(fbo, WIDTH, HEIGHT);
 416                 resource_pool->release_fbo(fbo);
 417
 418                 subsample_chroma(cbcr_full_tex, cbcr_tex);
 419                 resource_pool->release_2d_texture(cbcr_full_tex);
 420
 421                 // Set the right state for rgba_tex.
 422                 glBindFramebuffer(GL_FRAMEBUFFER, 0);
 423                 glBindTexture(GL_TEXTURE_2D, rgba_tex);
 424                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 425                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 426                 glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 427
 428                 RefCountedGLsync fence(GL_SYNC_GPU_COMMANDS_COMPLETE, /*flags=*/0);
 429                 check_error();
 430
 431                 // Make sure the H.264 gets a reference to all the
 432                 // input frames needed, so that they are not released back
 433                 // until the rendering is done.
 434                 vector<RefCountedFrame> input_frames;
 435                 for (int card_index = 0; card_index < NUM_CARDS; ++card_index) {
 436                         input_frames.push_back(bmusb_current_rendering_frame[card_index]);
 437                 }
 438                 h264_encoder->end_frame(fence, input_frames);
 439
 440                 // The live frame just shows the RGBA texture we just rendered.
 441                 // It owns rgba_tex now.
 442                 DisplayFrame live_frame;
 443                 live_frame.chain = display_chain.get();
 444                 live_frame.setup_chain = [this, rgba_tex]{
 445                         display_input->set_texture_num(rgba_tex);
 446                 };
 447                 live_frame.ready_fence = fence;
 448                 live_frame.input_frames = {};
 449                 live_frame.temp_textures = { rgba_tex };
 450                 output_channel[OUTPUT_LIVE].output_frame(live_frame);
 451
 452                 // The preview frame shows the first input. Note that the textures
 453                 // are owned by the input frame, not the display frame.
 454                 if (bmusb_current_rendering_frame[0] != nullptr) {
 455                         const PBOFrameAllocator::Userdata *input0_userdata = (const PBOFrameAllocator::Userdata *)bmusb_current_rendering_frame[0]->userdata;
 456                         GLuint input0_y_tex = input0_userdata->tex_y;
 457                         GLuint input0_cbcr_tex = input0_userdata->tex_cbcr;
 458                         DisplayFrame preview0_frame;
 459                         preview0_frame.chain = preview0_chain.get();
 460                         preview0_frame.setup_chain = [this, input0_y_tex, input0_cbcr_tex]{
 461                                 preview0_input->set_texture_num(0, input0_y_tex);
 462                                 preview0_input->set_texture_num(1, input0_cbcr_tex);
 463                         };
 464                         preview0_frame.ready_fence = fence;
 465                         preview0_frame.input_frames = { bmusb_current_rendering_frame[0] };
 466                         preview0_frame.temp_textures = {};
 467                         output_channel[OUTPUT_PREVIEW].output_frame(preview0_frame);
 468                         output_channel[OUTPUT_INPUT0].output_frame(preview0_frame);
 469                 }
 470
 471                 // Same for the other preview.
 472                 // TODO: Use a for loop. Gah.
 473                 if (bmusb_current_rendering_frame[1] != nullptr) {
 474                         const PBOFrameAllocator::Userdata *input1_userdata = (const PBOFrameAllocator::Userdata *)bmusb_current_rendering_frame[1]->userdata;
 475                         GLuint input1_y_tex = input1_userdata->tex_y;
 476                         GLuint input1_cbcr_tex = input1_userdata->tex_cbcr;
 477                         DisplayFrame preview1_frame;
 478                         preview1_frame.chain = preview1_chain.get();
 479                         preview1_frame.setup_chain = [this, input1_y_tex, input1_cbcr_tex]{
 480                                 preview1_input->set_texture_num(0, input1_y_tex);
 481                                 preview1_input->set_texture_num(1, input1_cbcr_tex);
 482                         };
 483                         preview1_frame.ready_fence = fence;
 484                         preview1_frame.input_frames = { bmusb_current_rendering_frame[1] };
 485                         preview1_frame.temp_textures = {};
 486                         output_channel[OUTPUT_INPUT1].output_frame(preview1_frame);
 487                 }
 488
 489                 clock_gettime(CLOCK_MONOTONIC, &now);
 490                 double elapsed = now.tv_sec - start.tv_sec +
 491                         1e-9 * (now.tv_nsec - start.tv_nsec);
 492                 if (frame % 100 == 0) {
 493                         printf("%d frames in %.3f seconds = %.1f fps (%.1f ms/frame)\n",
 494                                 frame, elapsed, frame / elapsed,
 495                                 1e3 * elapsed / frame);
 496                 //      chain->print_phase_timing();
 497                 }
 498
 499                 // Reset every 100 frames, so that local variations in frame times
 500                 // (especially for the first few frames, when the shaders are
 501                 // compiled etc.) don't make it hard to measure for the entire
 502                 // remaining duration of the program.
 503                 if (frame == 10000) {
 504                         frame = 0;
 505                         start = now;
 506                 }
 507                 check_error();
 508         }
 509 }
 510
 511 void Mixer::subsample_chroma(GLuint src_tex, GLuint dst_tex)
 512 {
 513         GLuint vao;
 514         glGenVertexArrays(1, &vao);
 515         check_error();
 516
 517         float vertices[] = {
 518                 0.0f, 2.0f,
 519                 0.0f, 0.0f,
 520                 2.0f, 0.0f
 521         };
 522
 523         glBindVertexArray(vao);
 524         check_error();
 525
 526         // Extract Cb/Cr.
 527         GLuint fbo = resource_pool->create_fbo(dst_tex);
 528         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 529         glViewport(0, 0, WIDTH/2, HEIGHT/2);
 530         check_error();
 531
 532         glUseProgram(cbcr_program_num);
 533         check_error();
 534
 535         glActiveTexture(GL_TEXTURE0);
 536         check_error();
 537         glBindTexture(GL_TEXTURE_2D, src_tex);
 538         check_error();
 539         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
 540         check_error();
 541         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
 542         check_error();
 543         glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
 544         check_error();
 545
 546         float chroma_offset_0[] = { -0.5f / WIDTH, 0.0f };
 547         set_uniform_vec2(cbcr_program_num, "foo", "chroma_offset_0", chroma_offset_0);
 548
 549         GLuint position_vbo = fill_vertex_attribute(cbcr_program_num, "position", 2, GL_FLOAT, sizeof(vertices), vertices);
 550         GLuint texcoord_vbo = fill_vertex_attribute(cbcr_program_num, "texcoord", 2, GL_FLOAT, sizeof(vertices), vertices);  // Same as vertices.
 551
 552         glDrawArrays(GL_TRIANGLES, 0, 3);
 553         check_error();
 554
 555         cleanup_vertex_attribute(cbcr_program_num, "position", position_vbo);
 556         cleanup_vertex_attribute(cbcr_program_num, "texcoord", texcoord_vbo);
 557
 558         glUseProgram(0);
 559         check_error();
 560
 561         resource_pool->release_fbo(fbo);
 562         glDeleteVertexArrays(1, &vao);
 563 }
 564
 565 void Mixer::release_display_frame(DisplayFrame *frame)
 566 {
 567         for (GLuint texnum : frame->temp_textures) {
 568                 resource_pool->release_2d_texture(texnum);
 569         }
 570         frame->temp_textures.clear();
 571         frame->ready_fence.reset();
 572         frame->input_frames.clear();
 573 }
 574
 575 void Mixer::start()
 576 {
 577         mixer_thread = std::thread(&Mixer::thread_func, this);
 578 }
 579
 580 void Mixer::quit()
 581 {
 582         should_quit = true;
 583         mixer_thread.join();
 584 }
 585
 586 void Mixer::cut(Source source)
 587 {
 588         current_source = source;
 589 }
 590
 591 void Mixer::OutputChannel::output_frame(DisplayFrame frame)
 592 {
 593         // Store this frame for display. Remove the ready frame if any
 594         // (it was seemingly never used).
 595         {
 596                 std::unique_lock<std::mutex> lock(frame_mutex);
 597                 if (has_ready_frame) {
 598                         parent->release_display_frame(&ready_frame);
 599                 }
 600                 ready_frame = frame;
 601                 has_ready_frame = true;
 602         }
 603
 604         if (has_new_frame_ready_callback) {
 605                 new_frame_ready_callback();
 606         }
 607 }
 608
 609 bool Mixer::OutputChannel::get_display_frame(DisplayFrame *frame)
 610 {
 611         std::unique_lock<std::mutex> lock(frame_mutex);
 612         if (!has_current_frame && !has_ready_frame) {
 613                 return false;
 614         }
 615
 616         if (has_current_frame && has_ready_frame) {
 617                 // We have a new ready frame. Toss the current one.
 618                 parent->release_display_frame(&current_frame);
 619                 has_current_frame = false;
 620         }
 621         if (has_ready_frame) {
 622                 assert(!has_current_frame);
 623                 current_frame = ready_frame;
 624                 ready_frame.ready_fence.reset();  // Drop the refcount.
 625                 ready_frame.input_frames.clear();  // Drop the refcounts.
 626                 has_current_frame = true;
 627                 has_ready_frame = false;
 628         }
 629
 630         *frame = current_frame;
 631         return true;
 632 }
 633
 634 void Mixer::OutputChannel::set_frame_ready_callback(Mixer::new_frame_ready_callback_t callback)
 635 {
 636         new_frame_ready_callback = callback;
 637         has_new_frame_ready_callback = true;
 638 }