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::execute_javascript_async(const string &js)
  75 {
  76         post_to_cef_ui_thread([this, js] {
  77                 CefString script_url("<theme eval>");
  78                 int start_line = 1;
  79                 browser->GetMainFrame()->ExecuteJavaScript(js, script_url, start_line);
  80         });
  81 }
  82
  83 void CEFCapture::OnPaint(const void *buffer, int width, int height)
  84 {
  85         steady_clock::time_point timestamp = steady_clock::now();
  86
  87         VideoFormat video_format;
  88         video_format.width = width;
  89         video_format.height = height;
  90         video_format.stride = width * 4;
  91         video_format.frame_rate_nom = max_fps;
  92         video_format.frame_rate_den = 1;
  93         video_format.has_signal = true;
  94         video_format.is_connected = true;
  95
  96         FrameAllocator::Frame video_frame = video_frame_allocator->alloc_frame();
  97         if (video_frame.data != nullptr) {
  98                 assert(video_frame.size >= unsigned(width * height * 4));
  99                 assert(!video_frame.interleaved);
 100                 memcpy(video_frame.data, buffer, width * height * 4);
 101                 video_frame.len = video_format.stride * height;
 102                 video_frame.received_timestamp = timestamp;
 103         }
 104         frame_callback(timecode++,
 105                 video_frame, 0, video_format,
 106                 FrameAllocator::Frame(), 0, AudioFormat());
 107 }
 108
 109 #define FRAME_SIZE (8 << 20)  // 8 MB.
 110
 111 void CEFCapture::configure_card()
 112 {
 113         if (video_frame_allocator == nullptr) {
 114                 owned_video_frame_allocator.reset(new MallocFrameAllocator(FRAME_SIZE, NUM_QUEUED_VIDEO_FRAMES));
 115                 set_video_frame_allocator(owned_video_frame_allocator.get());
 116         }
 117 }
 118
 119 void CEFCapture::start_bm_capture()
 120 {
 121         cef_app->initialize_cef();
 122
 123         CefPostTask(TID_UI, new CEFTaskAdapter([this]{
 124                 lock_guard<mutex> lock(browser_mutex);
 125
 126                 CefBrowserSettings browser_settings;
 127                 browser_settings.web_security = cef_state_t::STATE_DISABLED;
 128                 browser_settings.webgl = cef_state_t::STATE_ENABLED;
 129                 browser_settings.windowless_frame_rate = max_fps;
 130
 131                 CefWindowInfo window_info;
 132                 window_info.SetAsWindowless(0);
 133                 browser = CefBrowserHost::CreateBrowserSync(window_info, cef_client, start_url, browser_settings, nullptr);
 134                 for (function<void()> &task : deferred_tasks) {
 135                         task();
 136                 }
 137                 deferred_tasks.clear();
 138         }));
 139 }
 140
 141 void CEFCapture::stop_dequeue_thread()
 142 {
 143         lock_guard<mutex> lock(browser_mutex);
 144         cef_app->close_browser(browser);
 145         browser = nullptr;  // Or unref_cef() will be sad.
 146         cef_app->unref_cef();
 147 }
 148
 149 std::map<uint32_t, VideoMode> CEFCapture::get_available_video_modes() const
 150 {
 151         VideoMode mode;
 152
 153         char buf[256];
 154         snprintf(buf, sizeof(buf), "%ux%u", width, height);
 155         mode.name = buf;
 156
 157         mode.autodetect = false;
 158         mode.width = width;
 159         mode.height = height;
 160         mode.frame_rate_num = max_fps;
 161         mode.frame_rate_den = 1;
 162         mode.interlaced = false;
 163
 164         return {{ 0, mode }};
 165 }
 166
 167 std::map<uint32_t, std::string> CEFCapture::get_available_video_inputs() const
 168 {
 169         return {{ 0, "HTML video input" }};
 170 }
 171
 172 std::map<uint32_t, std::string> CEFCapture::get_available_audio_inputs() const
 173 {
 174         return {{ 0, "Fake HTML audio input (silence)" }};
 175 }
 176
 177 void CEFCapture::set_video_mode(uint32_t video_mode_id)
 178 {
 179         assert(video_mode_id == 0);
 180 }
 181
 182 void CEFCapture::set_video_input(uint32_t video_input_id)
 183 {
 184         assert(video_input_id == 0);
 185 }
 186
 187 void CEFCapture::set_audio_input(uint32_t audio_input_id)
 188 {
 189         assert(audio_input_id == 0);
 190 }
 191
 192 void NageruCEFClient::OnPaint(CefRefPtr<CefBrowser> browser, PaintElementType type, const RectList &dirtyRects, const void *buffer, int width, int height)
 193 {
 194         parent->OnPaint(buffer, width, height);
 195 }
 196
 197 bool NageruCEFClient::GetViewRect(CefRefPtr<CefBrowser> browser, CefRect &rect)
 198 {
 199         rect = CefRect(0, 0, width, height);
 200         return true;
 201 }