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::OnPaint(const void *buffer, int width, int height)
  67 {
  68         steady_clock::time_point timestamp = steady_clock::now();
  69
  70         VideoFormat video_format;
  71         video_format.width = width;
  72         video_format.height = height;
  73         video_format.stride = width * 4;
  74         video_format.frame_rate_nom = 60;  // FIXME
  75         video_format.frame_rate_den = 1;
  76         video_format.has_signal = true;
  77         video_format.is_connected = true;
  78
  79         FrameAllocator::Frame video_frame = video_frame_allocator->alloc_frame();
  80         if (video_frame.data != nullptr) {
  81                 assert(video_frame.size >= unsigned(width * height * 4));
  82                 assert(!video_frame.interleaved);
  83                 memcpy(video_frame.data, buffer, width * height * 4);
  84                 video_frame.len = video_format.stride * height;
  85                 video_frame.received_timestamp = timestamp;
  86         }
  87         frame_callback(timecode++,
  88                 video_frame, 0, video_format,
  89                 FrameAllocator::Frame(), 0, AudioFormat());
  90 }
  91
  92 #define FRAME_SIZE (8 << 20)  // 8 MB.
  93
  94 void CEFCapture::configure_card()
  95 {
  96         if (video_frame_allocator == nullptr) {
  97                 owned_video_frame_allocator.reset(new MallocFrameAllocator(FRAME_SIZE, NUM_QUEUED_VIDEO_FRAMES));
  98                 set_video_frame_allocator(owned_video_frame_allocator.get());
  99         }
 100 }
 101
 102 void CEFCapture::start_bm_capture()
 103 {
 104         cef_app->initialize_cef();
 105
 106         CefPostTask(TID_UI, new CEFTaskAdapter([this]{
 107                 lock_guard<mutex> lock(browser_mutex);
 108
 109                 CefBrowserSettings browser_settings;
 110                 browser_settings.web_security = cef_state_t::STATE_DISABLED;
 111                 browser_settings.webgl = cef_state_t::STATE_ENABLED;
 112                 browser_settings.windowless_frame_rate = 60;
 113
 114                 CefWindowInfo window_info;
 115                 window_info.SetAsWindowless(0);
 116                 browser = CefBrowserHost::CreateBrowserSync(window_info, cef_client, start_url, browser_settings, nullptr);
 117                 for (function<void()> &task : deferred_tasks) {
 118                         task();
 119                 }
 120                 deferred_tasks.clear();
 121         }));
 122 }
 123
 124 void CEFCapture::stop_dequeue_thread()
 125 {
 126         lock_guard<mutex> lock(browser_mutex);
 127         cef_app->close_browser(browser);
 128         browser = nullptr;  // Or unref_cef() will be sad.
 129         cef_app->unref_cef();
 130 }
 131
 132 std::map<uint32_t, VideoMode> CEFCapture::get_available_video_modes() const
 133 {
 134         VideoMode mode;
 135
 136         char buf[256];
 137         snprintf(buf, sizeof(buf), "%ux%u", width, height);
 138         mode.name = buf;
 139
 140         mode.autodetect = false;
 141         mode.width = width;
 142         mode.height = height;
 143         mode.frame_rate_num = 60;  // FIXME
 144         mode.frame_rate_den = 1;
 145         mode.interlaced = false;
 146
 147         return {{ 0, mode }};
 148 }
 149
 150 std::map<uint32_t, std::string> CEFCapture::get_available_video_inputs() const
 151 {
 152         return {{ 0, "HTML video input" }};
 153 }
 154
 155 std::map<uint32_t, std::string> CEFCapture::get_available_audio_inputs() const
 156 {
 157         return {{ 0, "Fake HTML audio input (silence)" }};
 158 }
 159
 160 void CEFCapture::set_video_mode(uint32_t video_mode_id)
 161 {
 162         assert(video_mode_id == 0);
 163 }
 164
 165 void CEFCapture::set_video_input(uint32_t video_input_id)
 166 {
 167         assert(video_input_id == 0);
 168 }
 169
 170 void CEFCapture::set_audio_input(uint32_t audio_input_id)
 171 {
 172         assert(audio_input_id == 0);
 173 }
 174
 175 void NageruCEFClient::OnPaint(CefRefPtr<CefBrowser> browser, PaintElementType type, const RectList &dirtyRects, const void *buffer, int width, int height)
 176 {
 177         parent->OnPaint(buffer, width, height);
 178 }
 179
 180 bool NageruCEFClient::GetViewRect(CefRefPtr<CefBrowser> browser, CefRect &rect)
 181 {
 182         rect = CefRect(0, 0, width, height);
 183         return true;
 184 }