Implement basic support for CEF.

[nageru] / cef_capture.cpp

diff --git a/cef_capture.cpp b/cef_capture.cpp
new file mode 100644 (file)
index 0000000..c05c295
--- /dev/null
+++ b/cef_capture.cpp
@@ -0,0 +1,152 @@
+#include <assert.h>
+#include <stdio.h>
+#include <string.h>
+#include <chrono>
+#include <memory>
+#include <string>
+
+#include "cef_capture.h"
+#include "nageru_cef_app.h"
+
+#undef CHECK
+#include <cef_app.h>
+#include <cef_browser.h>
+#include <cef_client.h>
+
+#include "bmusb/bmusb.h"
+
+using namespace std;
+using namespace std::chrono;
+using namespace bmusb;
+
+extern CefRefPtr<NageruCefApp> cef_app;
+
+CEFCapture::CEFCapture(const string &url, unsigned width, unsigned height)
+       : cef_client(new NageruCEFClient(width, height, this)),
+         width(width),
+         height(height),
+         start_url(url)
+{
+       char buf[256];
+       snprintf(buf, sizeof(buf), "CEF card %d", card_index + 1);
+       description = buf;
+}
+
+CEFCapture::~CEFCapture()
+{
+       if (has_dequeue_callbacks) {
+               dequeue_cleanup_callback();
+       }
+}
+
+void CEFCapture::OnPaint(const void *buffer, int width, int height)
+{
+       steady_clock::time_point timestamp = steady_clock::now();
+
+       VideoFormat video_format;
+       video_format.width = width;
+       video_format.height = height;
+       video_format.stride = width * 4;
+       video_format.frame_rate_nom = 60;  // FIXME
+       video_format.frame_rate_den = 1;
+       video_format.has_signal = true;
+       video_format.is_connected = true;
+
+       FrameAllocator::Frame video_frame = video_frame_allocator->alloc_frame();
+       if (video_frame.data != nullptr) {
+               assert(video_frame.size >= unsigned(width * height * 4));
+               assert(!video_frame.interleaved);
+               memcpy(video_frame.data, buffer, width * height * 4);
+               video_frame.len = video_format.stride * height;
+               video_frame.received_timestamp = timestamp;
+       }
+       frame_callback(timecode++,
+               video_frame, 0, video_format,
+               FrameAllocator::Frame(), 0, AudioFormat());
+}
+
+#define FRAME_SIZE (8 << 20)  // 8 MB.
+
+void CEFCapture::configure_card()
+{
+       if (video_frame_allocator == nullptr) {
+               owned_video_frame_allocator.reset(new MallocFrameAllocator(FRAME_SIZE, NUM_QUEUED_VIDEO_FRAMES));
+               set_video_frame_allocator(owned_video_frame_allocator.get());
+       }
+}
+
+void CEFCapture::start_bm_capture()
+{
+       cef_app->initialize_cef();
+
+       CefBrowserSettings browser_settings;
+       browser_settings.web_security = cef_state_t::STATE_DISABLED;
+       browser_settings.webgl = cef_state_t::STATE_ENABLED;
+       browser_settings.windowless_frame_rate = 60;
+
+       CefWindowInfo window_info;
+       window_info.SetAsWindowless(0);
+       CefBrowserHost::CreateBrowser(window_info, cef_client, start_url, browser_settings, nullptr);
+}
+
+void CEFCapture::stop_dequeue_thread()
+{
+       lock_guard<mutex> lock(browser_mutex);
+       cef_app->close_browser(browser);
+       browser = nullptr;  // Or unref_cef() will be sad.
+       cef_app->unref_cef();
+}
+
+std::map<uint32_t, VideoMode> CEFCapture::get_available_video_modes() const
+{
+       VideoMode mode;
+
+       char buf[256];
+       snprintf(buf, sizeof(buf), "%ux%u", width, height);
+       mode.name = buf;
+
+       mode.autodetect = false;
+       mode.width = width;
+       mode.height = height;
+       mode.frame_rate_num = 60;  // FIXME
+       mode.frame_rate_den = 1;
+       mode.interlaced = false;
+
+       return {{ 0, mode }};
+}
+
+std::map<uint32_t, std::string> CEFCapture::get_available_video_inputs() const
+{
+       return {{ 0, "HTML video input" }};
+}
+
+std::map<uint32_t, std::string> CEFCapture::get_available_audio_inputs() const
+{
+       return {{ 0, "Fake HTML audio input (silence)" }};
+}
+
+void CEFCapture::set_video_mode(uint32_t video_mode_id)
+{
+       assert(video_mode_id == 0);
+}
+
+void CEFCapture::set_video_input(uint32_t video_input_id)
+{
+       assert(video_input_id == 0);
+}
+
+void CEFCapture::set_audio_input(uint32_t audio_input_id)
+{
+       assert(audio_input_id == 0);
+}
+
+void NageruCEFClient::OnPaint(CefRefPtr<CefBrowser> browser, PaintElementType type, const RectList &dirtyRects, const void *buffer, int width, int height)
+{
+       parent->OnPaint(buffer, width, height);
+}
+
+bool NageruCEFClient::GetViewRect(CefRefPtr<CefBrowser> browser, CefRect &rect)
+{
+       rect = CefRect(0, 0, width, height);
+       return true;
+}