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

   1 #include "analyzer.h"
   2
   3 #include <QDialogButtonBox>
   4 #include <QSurface>
   5
   6 #include <movit/resource_pool.h>
   7 #include <movit/util.h>
   8
   9 #include "context.h"
  10 #include "flags.h"
  11 #include "mixer.h"
  12 #include "ui_analyzer.h"
  13
  14 using namespace std;
  15
  16 Analyzer::Analyzer()
  17         : ui(new Ui::Analyzer)
  18 {
  19         ui->setupUi(this);
  20
  21         //connect(ui->button_box, &QDialogButtonBox::accepted, [this]{ this->close(); });
  22
  23         ui->input_box->addItem("Live", Mixer::OUTPUT_LIVE);
  24         ui->input_box->addItem("Preview", Mixer::OUTPUT_PREVIEW);
  25         unsigned num_channels = global_mixer->get_num_channels();
  26         for (unsigned channel_idx = 0; channel_idx < num_channels; ++channel_idx) {
  27                 Mixer::Output channel = static_cast<Mixer::Output>(Mixer::OUTPUT_INPUT0 + channel_idx);
  28                 string name = global_mixer->get_channel_name(channel);
  29                 ui->input_box->addItem(QString::fromStdString(name), channel);
  30         }
  31
  32         connect(ui->grab_btn, &QPushButton::clicked, bind(&Analyzer::grab_clicked, this));
  33         connect(ui->input_box, static_cast<void(QComboBox::*)(int)>(&QComboBox::currentIndexChanged), bind(&Analyzer::signal_changed, this));
  34         signal_changed();
  35
  36         surface = create_surface(QSurfaceFormat::defaultFormat());
  37         context = create_context(surface);
  38
  39         if (!make_current(context, surface)) {
  40                 printf("oops\n");
  41                 exit(1);
  42         }
  43
  44         glGenBuffers(1, &pbo);
  45         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
  46         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, global_flags.width * global_flags.height * 4, NULL, GL_STREAM_READ);
  47 }
  48
  49 Analyzer::~Analyzer()
  50 {
  51         if (!make_current(context, surface)) {
  52                 printf("oops\n");
  53                 exit(1);
  54         }
  55         glDeleteBuffers(1, &pbo);
  56         check_error();
  57         if (resource_pool != nullptr) {
  58                 resource_pool->clean_context();
  59         }
  60         delete_context(context);
  61         delete surface;  // TODO?
  62 }
  63
  64 void Analyzer::grab_clicked()
  65 {
  66         Mixer::Output channel = static_cast<Mixer::Output>(ui->input_box->currentData().value<int>());
  67
  68         if (!make_current(context, surface)) {
  69                 printf("oops\n");
  70                 exit(1);
  71         }
  72
  73         Mixer::DisplayFrame frame;
  74         if (!global_mixer->get_display_frame(channel, &frame)) {
  75                 printf("Not ready yet\n");
  76                 return;
  77         }
  78
  79         // Set up an FBO to render into.
  80         if (resource_pool == nullptr) {
  81                 resource_pool = frame.chain->get_resource_pool();
  82         } else {
  83                 assert(resource_pool == frame.chain->get_resource_pool());
  84         }
  85         GLuint fbo_tex = resource_pool->create_2d_texture(GL_RGBA8, global_flags.width, global_flags.height);
  86         check_error();
  87         GLuint fbo = resource_pool->create_fbo(fbo_tex);
  88         check_error();
  89
  90         glWaitSync(frame.ready_fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
  91         check_error();
  92         frame.setup_chain();
  93         check_error();
  94         glDisable(GL_FRAMEBUFFER_SRGB);
  95         check_error();
  96         frame.chain->render_to_fbo(fbo, global_flags.width, global_flags.height);
  97         check_error();
  98
  99         // Read back to memory.
 100         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
 101         check_error();
 102         glBindBuffer(GL_PIXEL_PACK_BUFFER, pbo);
 103         check_error();
 104         glReadPixels(0, 0, global_flags.width, global_flags.height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 105         check_error();
 106
 107         unsigned char *buf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);
 108         check_error();
 109
 110         int r_hist[256] = {0}, g_hist[256] = {0}, b_hist[256] = {0};
 111         const unsigned char *ptr = buf;
 112         for (int y = 0; y < global_flags.width; ++y) {
 113                 for (int x = 0; x < global_flags.height; ++x) {
 114                         uint8_t b = *ptr++;
 115                         uint8_t g = *ptr++;
 116                         uint8_t r = *ptr++;
 117                         uint8_t a = *ptr++;
 118
 119                         ++r_hist[r];
 120                         ++g_hist[g];
 121                         ++b_hist[b];
 122                 }
 123         }
 124
 125         glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
 126         check_error();
 127         glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
 128         check_error();
 129         glBindFramebuffer(GL_FRAMEBUFFER, 0);
 130         check_error();
 131
 132         printf("R hist:");
 133         for (unsigned i = 0; i < 256; ++i) { printf(" %d", r_hist[i]); }
 134         printf("\n");
 135         printf("G hist:");
 136         for (unsigned i = 0; i < 256; ++i) { printf(" %d", g_hist[i]); }
 137         printf("\n");
 138         printf("B hist:");
 139         for (unsigned i = 0; i < 256; ++i) { printf(" %d", b_hist[i]); }
 140         printf("\n");
 141
 142         resource_pool->release_2d_texture(fbo_tex);
 143         check_error();
 144         resource_pool->release_fbo(fbo);
 145         check_error();
 146 }
 147
 148 void Analyzer::signal_changed()
 149 {
 150         Mixer::Output channel = static_cast<Mixer::Output>(ui->input_box->currentData().value<int>());
 151         ui->display->set_output(channel);
 152 }