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         //ui->display->set_output(Mixer::OUTPUT_LIVE);
  34         surface = create_surface(QSurfaceFormat::defaultFormat());
  35         context = create_context(surface);
  36
  37         if (!make_current(context, surface)) {
  38                 printf("oops\n");
  39                 exit(1);
  40         }
  41
  42         glGenBuffers(1, &pbo);
  43         glBindBuffer(GL_PIXEL_PACK_BUFFER_ARB, pbo);
  44         glBufferData(GL_PIXEL_PACK_BUFFER_ARB, global_flags.width * global_flags.height * 4, NULL, GL_STREAM_READ);
  45 }
  46
  47 Analyzer::~Analyzer()
  48 {
  49         if (!make_current(context, surface)) {
  50                 printf("oops\n");
  51                 exit(1);
  52         }
  53         glDeleteBuffers(1, &pbo);
  54         check_error();
  55         if (resource_pool != nullptr) {
  56                 resource_pool->clean_context();
  57         }
  58         delete_context(context);
  59         delete surface;  // TODO?
  60 }
  61
  62 void Analyzer::grab_clicked()
  63 {
  64         Mixer::Output channel = static_cast<Mixer::Output>(ui->input_box->currentData().value<int>());
  65
  66         if (!make_current(context, surface)) {
  67                 printf("oops\n");
  68                 exit(1);
  69         }
  70
  71         Mixer::DisplayFrame frame;
  72         if (!global_mixer->get_display_frame(channel, &frame)) {
  73                 printf("Not ready yet\n");
  74                 return;
  75         }
  76
  77         // Set up an FBO to render into.
  78         if (resource_pool == nullptr) {
  79                 resource_pool = frame.chain->get_resource_pool();
  80         } else {
  81                 assert(resource_pool == frame.chain->get_resource_pool());
  82         }
  83         GLuint fbo_tex = resource_pool->create_2d_texture(GL_RGBA8, global_flags.width, global_flags.height);
  84         check_error();
  85         GLuint fbo = resource_pool->create_fbo(fbo_tex);
  86         check_error();
  87
  88         glWaitSync(frame.ready_fence.get(), /*flags=*/0, GL_TIMEOUT_IGNORED);
  89         check_error();
  90         frame.setup_chain();
  91         check_error();
  92         glDisable(GL_FRAMEBUFFER_SRGB);
  93         check_error();
  94         frame.chain->render_to_fbo(fbo, global_flags.width, global_flags.height);
  95         check_error();
  96
  97         // Read back to memory.
  98         glBindFramebuffer(GL_FRAMEBUFFER, fbo);
  99         check_error();
 100         glBindBuffer(GL_PIXEL_PACK_BUFFER, pbo);
 101         check_error();
 102         glReadPixels(0, 0, global_flags.width, global_flags.height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV, BUFFER_OFFSET(0));
 103         check_error();
 104
 105         unsigned char *buf = (unsigned char *)glMapBuffer(GL_PIXEL_PACK_BUFFER, GL_READ_ONLY);
 106         check_error();
 107
 108         int r_hist[256] = {0}, g_hist[256] = {0}, b_hist[256] = {0};
 109         const unsigned char *ptr = buf;
 110         for (int y = 0; y < global_flags.width; ++y) {
 111                 for (int x = 0; x < global_flags.height; ++x) {
 112                         uint8_t b = *ptr++;
 113                         uint8_t g = *ptr++;
 114                         uint8_t r = *ptr++;
 115                         uint8_t a = *ptr++;
 116
 117                         ++r_hist[r];
 118                         ++g_hist[g];
 119                         ++b_hist[b];
 120                 }
 121         }
 122
 123         glUnmapBuffer(GL_PIXEL_PACK_BUFFER);
 124         check_error();
 125         glBindBuffer(GL_PIXEL_PACK_BUFFER, 0);
 126         check_error();
 127         glBindFramebuffer(GL_FRAMEBUFFER, 0);
 128         check_error();
 129
 130         printf("R hist:");
 131         for (unsigned i = 0; i < 256; ++i) { printf(" %d", r_hist[i]); }
 132         printf("\n");
 133         printf("G hist:");
 134         for (unsigned i = 0; i < 256; ++i) { printf(" %d", g_hist[i]); }
 135         printf("\n");
 136         printf("B hist:");
 137         for (unsigned i = 0; i < 256; ++i) { printf(" %d", b_hist[i]); }
 138         printf("\n");
 139
 140         resource_pool->release_2d_texture(fbo_tex);
 141         check_error();
 142         resource_pool->release_fbo(fbo);
 143         check_error();
 144 }
 145