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

   1 #include "analyzer.h"
   2
   3 #include <QDialogButtonBox>
   4 #include <QMouseEvent>
   5 #include <QPen>
   6 #include <QSurface>
   7
   8 #include <movit/resource_pool.h>
   9 #include <movit/util.h>
  10
  11 #include "context.h"
  12 #include "flags.h"
  13 #include "mixer.h"
  14 #include "ui_analyzer.h"
  15
  16 // QCustomPlot includes qopenglfunctions.h, which #undefs all of the epoxy
  17 // definitions (ugh) and doesn't put back any others (ugh). Add the ones we
  18 // need back.
  19
  20 #define glBindBuffer epoxy_glBindBuffer
  21 #define glBindFramebuffer epoxy_glBindFramebuffer
  22 #define glBufferData epoxy_glBufferData
  23 #define glDeleteBuffers epoxy_glDeleteBuffers
  24 #define glDisable epoxy_glDisable
  25 #define glGenBuffers epoxy_glGenBuffers
  26 #define glGetError epoxy_glGetError
  27 #define glReadPixels epoxy_glReadPixels
  28 #define glUnmapBuffer epoxy_glUnmapBuffer
  29 #define glWaitSync epoxy_glWaitSync
  30
  31 using namespace std;
  32
  33 Analyzer::Analyzer()
  34         : ui(new Ui::Analyzer),
  35           grabbed_image(global_flags.width, global_flags.height, QImage::Format_ARGB32_Premultiplied)
  36 {
  37         ui->setupUi(this);
  38
  39         //connect(ui->button_box, &QDialogButtonBox::accepted, [this]{ this->close(); });
  40
  41         ui->input_box->addItem("Live", Mixer::OUTPUT_LIVE);
  42         ui->input_box->addItem("Preview", Mixer::OUTPUT_PREVIEW);
  43         unsigned num_channels = global_mixer->get_num_channels();
  44         for (unsigned channel_idx = 0; channel_idx < num_channels; ++channel_idx) {
  45                 Mixer::Output channel = static_cast<Mixer::Output>(Mixer::OUTPUT_INPUT0 + channel_idx);
  46                 string name = global_mixer->get_channel_name(channel);
  47                 ui->input_box->addItem(QString::fromStdString(name), channel);
  48         }
  49
  50         connect(ui->grab_btn, &QPushButton::clicked, bind(&Analyzer::grab_clicked, this));
  51         connect(ui->input_box, static_cast<void(QComboBox::*)(int)>(&QComboBox::currentIndexChanged), bind(&Analyzer::signal_changed, this));
  52         signal_changed();
  53         ui->grabbed_frame_label->installEventFilter(this);
  54
  55         surface = create_surface(QSurfaceFormat::defaultFormat());
  56         context = create_context(surface);
  57
  58         if (!make_current(context, surface)) {
  59                 printf("oops\n");
  60                 exit(1);
  61         }
  62
  63         glGenBuffers(1, &pbo);
  64         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
  65         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, global_flags.width * global_flags.height * 4, NULL, GL_STREAM_READ);
  66 }
  67
  68 Analyzer::~Analyzer()
  69 {
  70         if (!make_current(context, surface)) {
  71                 printf("oops\n");
  72                 exit(1);
  73         }
  74         glDeleteBuffers(1, &pbo);
  75         check_error();
  76         if (resource_pool != nullptr) {
  77                 resource_pool->clean_context();
  78         }
  79         delete_context(context);
  80         delete surface;
  81 }
  82
  83 void Analyzer::grab_clicked()
  84 {
  85         Mixer::Output channel = static_cast<Mixer::Output>(ui->input_box->currentData().value<int>());
  86
  87         if (!make_current(context, surface)) {
  88                 printf("oops\n");
  89                 exit(1);
  90         }
  91
  92         Mixer::DisplayFrame frame;
  93         if (!global_mixer->get_display_frame(channel, &frame)) {
  94                 printf("Not ready yet\n");
  95                 return;
  96         }
  97
  98         // Set up an FBO to render into.
  99         if (resource_pool == nullptr) {
 100                 resource_pool = frame.chain->get_resource_pool();
 101         } else {
 102                 assert(resource_pool == frame.chain->get_resource_pool());
 103         }
 104         GLuint fbo_tex = resource_pool->create_2d_texture(GL_RGBA8, global_flags.width, global_flags.height);
 105         check_error();
 106         GLuint fbo = resource_pool->create_fbo(fbo_tex);
 107         check_error();
 108
 109         glWaitSync(frame.ready_fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
 110         check_error();
 111         frame.setup_chain();
 112         check_error();
 113         glDisable(GL_FRAMEBUFFER_SRGB);
 114         check_error();
 115         frame.chain->render_to_fbo(fbo, global_flags.width, global_flags.height);
 116         check_error();
 117
 118         // Read back to memory.
 119         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 120         check_error();
 121         glBindBuffer(GL_PIXEL_PACK_BUFFER, pbo);
 122         check_error();
 123         glReadPixels(0, 0, global_flags.width, global_flags.height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 124         check_error();
 125
 126         unsigned char *buf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);
 127         check_error();
 128
 129         size_t pitch = global_flags.width * 4;
 130         for (int y = 0; y < global_flags.height; ++y) {
 131                 memcpy(grabbed_image.scanLine(global_flags.height - y - 1), buf + y * pitch, pitch);
 132         }
 133
 134         {
 135                 char buf[256];
 136                 snprintf(buf, sizeof(buf), "Grabbed frame (%dx%d)", global_flags.width, global_flags.height);
 137                 ui->grabbed_frame_sublabel->setText(buf);
 138         }
 139
 140         QPixmap pixmap;
 141         pixmap.convertFromImage(grabbed_image);
 142         ui->grabbed_frame_label->setPixmap(pixmap);
 143
 144         int r_hist[256] = {0}, g_hist[256] = {0}, b_hist[256] = {0};
 145         const unsigned char *ptr = buf;
 146         for (int i = 0; i < global_flags.height * global_flags.width; ++i) {
 147                 uint8_t b = *ptr++;
 148                 uint8_t g = *ptr++;
 149                 uint8_t r = *ptr++;
 150                 ++ptr;
 151
 152                 ++r_hist[r];
 153                 ++g_hist[g];
 154                 ++b_hist[b];
 155         }
 156
 157         glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
 158         check_error();
 159         glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
 160         check_error();
 161         glBindFramebuffer(GL_FRAMEBUFFER, 0);
 162         check_error();
 163
 164         QVector<double> r_vec(256), g_vec(256), b_vec(256), x_vec(256);
 165         double max = 0.0;
 166         for (unsigned i = 0; i < 256; ++i) {
 167                 x_vec[i] = i;
 168                 r_vec[i] = log(r_hist[i] + 1.0);
 169                 g_vec[i] = log(g_hist[i] + 1.0);
 170                 b_vec[i] = log(b_hist[i] + 1.0);
 171
 172                 max = std::max(max, r_vec[i]);
 173                 max = std::max(max, g_vec[i]);
 174                 max = std::max(max, b_vec[i]);
 175         }
 176
 177         ui->histogram->clearGraphs();
 178         ui->histogram->addGraph();
 179         ui->histogram->graph(0)->setData(x_vec, r_vec);
 180         ui->histogram->graph(0)->setPen(QPen(Qt::red));
 181         ui->histogram->graph(0)->setBrush(QBrush(QColor(255, 127, 127, 80)));
 182         ui->histogram->addGraph();
 183         ui->histogram->graph(1)->setData(x_vec, g_vec);
 184         ui->histogram->graph(1)->setPen(QPen(Qt::green));
 185         ui->histogram->graph(1)->setBrush(QBrush(QColor(127, 255, 127, 80)));
 186         ui->histogram->addGraph();
 187         ui->histogram->graph(2)->setData(x_vec, b_vec);
 188         ui->histogram->graph(2)->setPen(QPen(Qt::blue));
 189         ui->histogram->graph(2)->setBrush(QBrush(QColor(127, 127, 255, 80)));
 190
 191         ui->histogram->xAxis->setVisible(true);
 192         ui->histogram->yAxis->setVisible(false);
 193         ui->histogram->xAxis->setRange(0, 255);
 194         ui->histogram->yAxis->setRange(0, max);
 195         ui->histogram->replot();
 196
 197         resource_pool->release_2d_texture(fbo_tex);
 198         check_error();
 199         resource_pool->release_fbo(fbo);
 200         check_error();
 201 }
 202
 203 void Analyzer::signal_changed()
 204 {
 205         Mixer::Output channel = static_cast<Mixer::Output>(ui->input_box->currentData().value<int>());
 206         ui->display->set_output(channel);
 207 }
 208
 209 bool Analyzer::eventFilter(QObject *watched, QEvent *event)
 210 {
 211         if (event->type() == QEvent::MouseMove &&
 212             watched->isWidgetType()) {
 213                 const QMouseEvent *mouse_event = (QMouseEvent *)event;
 214                 const QPixmap *pixmap = ui->grabbed_frame_label->pixmap();
 215                 if (pixmap != nullptr) {
 216                         int x = lrint(mouse_event->x() * double(pixmap->width()) / ui->grabbed_frame_label->width());
 217                         int y = lrint(mouse_event->y() * double(pixmap->height()) / ui->grabbed_frame_label->height());
 218                         x = std::min(x, pixmap->width() - 1);
 219                         y = std::min(y, pixmap->height() - 1);
 220                         QRgb pixel = grabbed_image.pixel(x, y);
 221                         ui->red_label->setText(QString::fromStdString(to_string(qRed(pixel))));
 222                         ui->green_label->setText(QString::fromStdString(to_string(qGreen(pixel))));
 223                         ui->blue_label->setText(QString::fromStdString(to_string(qBlue(pixel))));
 224
 225                         char buf[256];
 226                         snprintf(buf, sizeof(buf), "#%02x%02x%02x", qRed(pixel), qGreen(pixel), qBlue(pixel));
 227                         ui->hex_label->setText(buf);
 228                 }
 229         }
 230         return false;
 231 }