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

   1 #include <assert.h>
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include <chrono>
   5 #include <memory>
   6 #include <string>
   7
   8 #include "cef_capture.h"
   9 #include "nageru_cef_app.h"
  10
  11 #undef CHECK
  12 #include <cef_app.h>
  13 #include <cef_browser.h>
  14 #include <cef_client.h>
  15
  16 #include "bmusb/bmusb.h"
  17
  18 using namespace std;
  19 using namespace std::chrono;
  20 using namespace bmusb;
  21
  22 extern CefRefPtr<NageruCefApp> cef_app;
  23
  24 CEFCapture::CEFCapture(const string &url, unsigned width, unsigned height)
  25         : cef_client(new NageruCEFClient(width, height, this)),
  26           width(width),
  27           height(height),
  28           start_url(url)
  29 {
  30         char buf[256];
  31         snprintf(buf, sizeof(buf), "CEF card %d", card_index + 1);
  32         description = buf;
  33 }
  34
  35 CEFCapture::~CEFCapture()
  36 {
  37         if (has_dequeue_callbacks) {
  38                 dequeue_cleanup_callback();
  39         }
  40 }
  41
  42 void CEFCapture::post_to_cef_ui_thread(std::function<void()> &&func)
  43 {
  44         lock_guard<mutex> lock(browser_mutex);
  45         if (browser != nullptr) {
  46                 CefPostTask(TID_UI, new CEFTaskAdapter(std::move(func)));
  47         } else {
  48                 deferred_tasks.push_back(std::move(func));
  49         }
  50 }
  51
  52 void CEFCapture::set_url(const string &url)
  53 {
  54         post_to_cef_ui_thread([this, url] {
  55                 browser->GetMainFrame()->LoadURL(url);
  56         });
  57 }
  58
  59 void CEFCapture::reload()
  60 {
  61         post_to_cef_ui_thread([this] {
  62                 browser->Reload();
  63         });
  64 }
  65
  66 void CEFCapture::set_max_fps(int max_fps)
  67 {
  68         post_to_cef_ui_thread([this, max_fps] {
  69                 browser->GetHost()->SetWindowlessFrameRate(max_fps);
  70                 this->max_fps = max_fps;
  71         });
  72 }
  73
  74 void CEFCapture::OnPaint(const void *buffer, int width, int height)
  75 {
  76         steady_clock::time_point timestamp = steady_clock::now();
  77
  78         VideoFormat video_format;
  79         video_format.width = width;
  80         video_format.height = height;
  81         video_format.stride = width * 4;
  82         video_format.frame_rate_nom = max_fps;
  83         video_format.frame_rate_den = 1;
  84         video_format.has_signal = true;
  85         video_format.is_connected = true;
  86
  87         FrameAllocator::Frame video_frame = video_frame_allocator->alloc_frame();
  88         if (video_frame.data != nullptr) {
  89                 assert(video_frame.size >= unsigned(width * height * 4));
  90                 assert(!video_frame.interleaved);
  91                 memcpy(video_frame.data, buffer, width * height * 4);
  92                 video_frame.len = video_format.stride * height;
  93                 video_frame.received_timestamp = timestamp;
  94         }
  95         frame_callback(timecode++,
  96                 video_frame, 0, video_format,
  97                 FrameAllocator::Frame(), 0, AudioFormat());
  98 }
  99
 100 #define FRAME_SIZE (8 << 20)  // 8 MB.
 101
 102 void CEFCapture::configure_card()
 103 {
 104         if (video_frame_allocator == nullptr) {
 105                 owned_video_frame_allocator.reset(new MallocFrameAllocator(FRAME_SIZE, NUM_QUEUED_VIDEO_FRAMES));
 106                 set_video_frame_allocator(owned_video_frame_allocator.get());
 107         }
 108 }
 109
 110 void CEFCapture::start_bm_capture()
 111 {
 112         cef_app->initialize_cef();
 113
 114         CefPostTask(TID_UI, new CEFTaskAdapter([this]{
 115                 lock_guard<mutex> lock(browser_mutex);
 116
 117                 CefBrowserSettings browser_settings;
 118                 browser_settings.web_security = cef_state_t::STATE_DISABLED;
 119                 browser_settings.webgl = cef_state_t::STATE_ENABLED;
 120                 browser_settings.windowless_frame_rate = max_fps;
 121
 122                 CefWindowInfo window_info;
 123                 window_info.SetAsWindowless(0);
 124                 browser = CefBrowserHost::CreateBrowserSync(window_info, cef_client, start_url, browser_settings, nullptr);
 125                 for (function<void()> &task : deferred_tasks) {
 126                         task();
 127                 }
 128                 deferred_tasks.clear();
 129         }));
 130 }
 131
 132 void CEFCapture::stop_dequeue_thread()
 133 {
 134         lock_guard<mutex> lock(browser_mutex);
 135         cef_app->close_browser(browser);
 136         browser = nullptr;  // Or unref_cef() will be sad.
 137         cef_app->unref_cef();
 138 }
 139
 140 std::map<uint32_t, VideoMode> CEFCapture::get_available_video_modes() const
 141 {
 142         VideoMode mode;
 143
 144         char buf[256];
 145         snprintf(buf, sizeof(buf), "%ux%u", width, height);
 146         mode.name = buf;
 147
 148         mode.autodetect = false;
 149         mode.width = width;
 150         mode.height = height;
 151         mode.frame_rate_num = max_fps;
 152         mode.frame_rate_den = 1;
 153         mode.interlaced = false;
 154
 155         return {{ 0, mode }};
 156 }
 157
 158 std::map<uint32_t, std::string> CEFCapture::get_available_video_inputs() const
 159 {
 160         return {{ 0, "HTML video input" }};
 161 }
 162
 163 std::map<uint32_t, std::string> CEFCapture::get_available_audio_inputs() const
 164 {
 165         return {{ 0, "Fake HTML audio input (silence)" }};
 166 }
 167
 168 void CEFCapture::set_video_mode(uint32_t video_mode_id)
 169 {
 170         assert(video_mode_id == 0);
 171 }
 172
 173 void CEFCapture::set_video_input(uint32_t video_input_id)
 174 {
 175         assert(video_input_id == 0);
 176 }
 177
 178 void CEFCapture::set_audio_input(uint32_t audio_input_id)
 179 {
 180         assert(audio_input_id == 0);
 181 }
 182
 183 void NageruCEFClient::OnPaint(CefRefPtr<CefBrowser> browser, PaintElementType type, const RectList &dirtyRects, const void *buffer, int width, int height)
 184 {
 185         parent->OnPaint(buffer, width, height);
 186 }
 187
 188 bool NageruCEFClient::GetViewRect(CefRefPtr<CefBrowser> browser, CefRect &rect)
 189 {
 190         rect = CefRect(0, 0, width, height);
 191         return true;
 192 }