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gstcefsrc.cc
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gstcefsrc.cc
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#include <cstdio>
#include <sstream>
#include <string>
#ifdef __APPLE__
#include <memory>
#include <string>
#include <vector>
#include <mach-o/dyld.h>
#include <dispatch/dispatch.h>
#include <CoreFoundation/CoreFoundation.h>
#endif
#include <include/base/cef_bind.h>
#include <include/base/cef_callback_helpers.h>
#include <include/wrapper/cef_closure_task.h>
#include <include/wrapper/cef_message_router.h>
#include "gstcefsrc.h"
#include "gstcefaudiometa.h"
#ifdef __APPLE__
#include "gstcefloader.h"
#include "gstcefnsapplication.h"
#endif
#define GST_ELEMENT_PROGRESS(el, type, code, text) \
G_STMT_START { \
gchar *__txt = _gst_element_error_printf text; \
gst_element_post_message (GST_ELEMENT_CAST (el), \
gst_message_new_progress (GST_OBJECT_CAST (el), \
GST_PROGRESS_TYPE_ ##type, code, __txt)); \
g_free (__txt); \
} G_STMT_END
GST_DEBUG_CATEGORY_STATIC (cef_src_debug);
#define GST_CAT_DEFAULT cef_src_debug
GST_DEBUG_CATEGORY_STATIC (cef_console_debug);
#define DEFAULT_WIDTH 1920
#define DEFAULT_HEIGHT 1080
#define DEFAULT_FPS_N 30
#define DEFAULT_FPS_D 1
#define DEFAULT_URL "https://www.google.com"
#define DEFAULT_GPU FALSE
#define DEFAULT_CHROMIUM_DEBUG_PORT -1
#define DEFAULT_LOG_SEVERITY LOGSEVERITY_INFO
#if !defined(__APPLE__) && defined(GST_CEF_USE_SANDBOX)
#define DEFAULT_SANDBOX TRUE
#else
#define DEFAULT_SANDBOX FALSE
#endif
#define DEFAULT_LISTEN_FOR_JS_SIGNALS FALSE
using CefStatus = enum : guint8 {
// CEF was either unloaded successfully or not yet loaded.
CEF_STATUS_NOT_LOADED = 0U,
// Blocks other elements from initializing CEF is it's already in progress.
CEF_STATUS_INITIALIZING = 1U << 1U,
// CEF's initialization process has completed successfully.
CEF_STATUS_INITIALIZED = 1U << 2U,
// No CEF elements will be allowed to complete initialization.
CEF_STATUS_FAILURE = 1U << 3U,
// CEF has been marked for shutdown, stopping any leftover events from being
// processed. Any elements that need it must wait till this flag and
// cef_initializing are cleared.
CEF_STATUS_SHUTTING_DOWN = 1U << 4U,
};
static CefStatus cef_status = CEF_STATUS_NOT_LOADED;
static const guint8 CEF_STATUS_MASK_INITIALIZED = CEF_STATUS_FAILURE | CEF_STATUS_INITIALIZED;
static const guint8 CEF_STATUS_MASK_TRANSITIONING =
CEF_STATUS_SHUTTING_DOWN | CEF_STATUS_INITIALIZING;
// Number of running CEF instances. Setting this to 0 must be accompanied
// with cef_shutdown to prevent leaks on application exit.
static guint64 browsers = 0U;
static GMutex init_lock;
static GCond init_cond;
#ifdef __APPLE__
// On every timeout, the CEF event handler will be run in the context
// of the main thread's Cocoa event loop.
static CFRunLoopTimerRef workTimer_ = nullptr;
#else
static GThread *thread = nullptr;
#endif
#define GST_TYPE_CEF_LOG_SEVERITY_MODE \
(gst_cef_log_severity_mode_get_type ())
static GType
gst_cef_log_severity_mode_get_type (void)
{
static GType type = 0;
static const GEnumValue values[] = {
{LOGSEVERITY_DEBUG, "debug / verbose cef log severity", "debug"},
{LOGSEVERITY_INFO, "info cef log severity", "info"},
{LOGSEVERITY_WARNING, "warning cef log severity", "warning"},
{LOGSEVERITY_ERROR, "error cef log severity", "error"},
{LOGSEVERITY_FATAL, "fatal cef log severity", "fatal"},
{LOGSEVERITY_DISABLE, "disable cef log severity", "disable"},
{0, NULL, NULL},
};
if (!type) {
type = g_enum_register_static ("GstCefLogSeverityMode", values);
}
return type;
}
enum
{
PROP_0,
PROP_URL,
PROP_GPU,
PROP_CHROMIUM_DEBUG_PORT,
PROP_CHROME_EXTRA_FLAGS,
PROP_SANDBOX,
PROP_LISTEN_FOR_JS_SIGNAL,
PROP_JS_FLAGS,
PROP_LOG_SEVERITY,
PROP_CEF_CACHE_LOCATION,
};
#define gst_cef_src_parent_class parent_class
G_DEFINE_TYPE (GstCefSrc, gst_cef_src, GST_TYPE_PUSH_SRC);
#define CEF_VIDEO_CAPS "video/x-raw, format=BGRA, width=[1, 2147483647], height=[1, 2147483647], framerate=[1/1, 60/1], pixel-aspect-ratio=1/1"
#define CEF_AUDIO_CAPS "audio/x-raw, format=F32LE, rate=[1, 2147483647], channels=[1, 2147483647], layout=interleaved"
static GstStaticPadTemplate gst_cef_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (CEF_VIDEO_CAPS)
);
gchar* get_plugin_base_path () {
GstPlugin *plugin = gst_registry_find_plugin(gst_registry_get(), "cef");
gchar* base_path = g_path_get_dirname(gst_plugin_get_filename(plugin));
gst_object_unref(plugin);
return base_path;
}
/** Cef Client */
/** Handlers */
// see https://bitbucket.org/chromiumembedded/cef-project/src/master/examples/message_router
// and https://bitbucket.org/chromiumembedded/cef/src/master/include/wrapper/cef_message_router.h
// for details of the message passing infrastructure in CEF
// Handle messages in the browser process.
class MessageHandler : public CefMessageRouterBrowserSide::Handler {
public:
explicit MessageHandler(GstCefSrc* src)
: src(src) {}
// Called due to gstSendMsg execution in ready_test.html.
bool OnQuery(CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
int64_t query_id,
const CefString& request,
bool persistent,
CefRefPtr<Callback> callback) override
{
if (!src) return false;
// TODO: do we want to make the incoming payload json??
bool success = false;
if (request == "ready") {
g_mutex_lock (&src->state_lock);
if (src->state == CEF_SRC_WAITING_FOR_READY) {
src->state = CEF_SRC_READY;
g_cond_broadcast (&src->state_cond);
success = true;
} else {
std::ostringstream error_msg;
error_msg << "error: (" << request << ") - " <<
"js ready signal sent with invalid cef state: " << cef_status;
GST_WARNING_OBJECT(src, "%s", error_msg.str().c_str());
success = false;
}
g_mutex_unlock (&src->state_lock);
} else if (request == "eos") {
if (src) {
gst_element_send_event(GST_ELEMENT(src), gst_event_new_eos());
success = true;
}
}
// send json response back to js
std::ostringstream response;
response <<
"{ " <<
"\"success\": \"" << (success ? "true" : "false") << "\", " <<
"\"cmd\": \"" << request << "\"" <<
" }";
if (success) {
GST_INFO_OBJECT(
src, "js signal processed successfully: %s", request.ToString().c_str()
);
callback->Success(response.str());
} else {
GST_WARNING_OBJECT(
src, "js signal processing error: %s", request.ToString().c_str()
);
callback->Failure(0, response.str());
}
return true;
}
private:
GstCefSrc* src;
DISALLOW_COPY_AND_ASSIGN(MessageHandler);
};
class RenderHandler : public CefRenderHandler
{
public:
RenderHandler(GstCefSrc *src) :
src (src)
{
}
~RenderHandler()
{
}
void GetViewRect(CefRefPtr<CefBrowser> browser, CefRect &rect) override
{
GST_LOG_OBJECT(src, "getting view rect");
GST_OBJECT_LOCK (src);
rect = CefRect(0, 0, src->vinfo.width ? src->vinfo.width : DEFAULT_WIDTH, src->vinfo.height ? src->vinfo.height : DEFAULT_HEIGHT);
GST_OBJECT_UNLOCK (src);
}
void OnPaint(CefRefPtr<CefBrowser> browser, PaintElementType type, const RectList &dirtyRects, const void * buffer, int w, int h) override
{
GstBuffer *new_buffer;
GST_LOG_OBJECT (src, "painting, width / height: %d %d", w, h);
new_buffer = gst_buffer_new_allocate (NULL, src->vinfo.width * src->vinfo.height * 4, NULL);
gst_buffer_fill (new_buffer, 0, buffer, w * h * 4);
GST_OBJECT_LOCK (src);
gst_buffer_replace (&(src->current_buffer), new_buffer);
gst_buffer_unref (new_buffer);
GST_OBJECT_UNLOCK (src);
GST_LOG_OBJECT (src, "done painting");
}
private:
GstCefSrc *src;
IMPLEMENT_REFCOUNTING(RenderHandler);
};
class AudioHandler : public CefAudioHandler
{
public:
AudioHandler(GstCefSrc *src) :
src (src)
{
}
~AudioHandler()
{
}
void OnAudioStreamStarted(CefRefPtr<CefBrowser> browser,
const CefAudioParameters& params,
int channels) override
{
GstStructure *s = gst_structure_new ("cef-audio-stream-start",
"channels", G_TYPE_INT, channels,
"rate", G_TYPE_INT, params.sample_rate,
nullptr);
GstEvent *event = gst_event_new_custom (GST_EVENT_CUSTOM_DOWNSTREAM, s);
mRate = params.sample_rate;
mChannels = channels;
GST_OBJECT_LOCK (src);
src->audio_events = g_list_append (src->audio_events, event);
GST_OBJECT_UNLOCK (src);
}
void OnAudioStreamPacket(CefRefPtr<CefBrowser> browser,
const float** data,
int frames,
int64_t pts) override
{
GstBuffer *buf;
GstMapInfo info;
gint i, j;
GST_LOG_OBJECT (src, "Handling audio stream packet with %d frames", frames);
buf = gst_buffer_new_allocate (NULL, mChannels * frames * 4, NULL);
gst_buffer_map (buf, &info, GST_MAP_WRITE);
for (i = 0; i < mChannels; i++) {
gfloat *cdata = (gfloat *) data[i];
for (j = 0; j < frames; j++) {
memcpy (info.data + j * 4 * mChannels + i * 4, &cdata[j], 4);
}
}
gst_buffer_unmap (buf, &info);
GST_OBJECT_LOCK (src);
GST_BUFFER_DURATION (buf) = gst_util_uint64_scale (frames, GST_SECOND, mRate);
if (!src->audio_buffers) {
src->audio_buffers = gst_buffer_list_new();
}
gst_buffer_list_add (src->audio_buffers, buf);
GST_OBJECT_UNLOCK (src);
GST_LOG_OBJECT (src, "Handled audio stream packet");
}
void OnAudioStreamStopped(CefRefPtr<CefBrowser> browser) override
{
}
void OnAudioStreamError(CefRefPtr<CefBrowser> browser,
const CefString& message) override {
GST_WARNING_OBJECT (src, "Audio stream error: %s", message.ToString().c_str());
}
private:
GstCefSrc *src;
gint mRate;
gint mChannels;
IMPLEMENT_REFCOUNTING(AudioHandler);
};
class DisplayHandler : public CefDisplayHandler {
public:
DisplayHandler(GstCefSrc *src) : src(src) {}
~DisplayHandler() = default;
virtual bool OnConsoleMessage(CefRefPtr<CefBrowser>, cef_log_severity_t level, const CefString &message, const CefString &source, int line) override {
GstDebugLevel gst_level = GST_LEVEL_NONE;
switch (level) {
case LOGSEVERITY_DEFAULT:
case LOGSEVERITY_INFO:
gst_level = GST_LEVEL_INFO;
break;
case LOGSEVERITY_DEBUG:
gst_level = GST_LEVEL_DEBUG;
break;
case LOGSEVERITY_WARNING:
gst_level = GST_LEVEL_WARNING;
break;
case LOGSEVERITY_ERROR:
case LOGSEVERITY_FATAL:
gst_level = GST_LEVEL_ERROR;
break;
case LOGSEVERITY_DISABLE:
gst_level = GST_LEVEL_NONE;
break;
};
GST_CAT_LEVEL_LOG (cef_console_debug, gst_level, src, "%s:%d %s", source.ToString().c_str(), line,
message.ToString().c_str());
return false;
}
private:
GstCefSrc *src;
IMPLEMENT_REFCOUNTING(DisplayHandler);
};
class BrowserClient :
public CefClient,
public CefLifeSpanHandler,
public CefRequestHandler
{
public:
BrowserClient(GstCefSrc *src) : src(src)
{
this->render_handler = new RenderHandler(src);
this->audio_handler = new AudioHandler(src);
this->display_handler = new DisplayHandler(src);
}
// CefClient Methods:
virtual CefRefPtr<CefLifeSpanHandler> GetLifeSpanHandler() override
{
return this;
}
virtual CefRefPtr<CefRenderHandler> GetRenderHandler() override
{
return render_handler;
}
virtual CefRefPtr<CefAudioHandler> GetAudioHandler() override
{
return audio_handler;
}
virtual CefRefPtr<CefRequestHandler> GetRequestHandler() override
{
return this;
}
virtual CefRefPtr<CefDisplayHandler> GetDisplayHandler() override
{
return display_handler;
}
bool OnProcessMessageReceived(
CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
CefProcessId source_process,
CefRefPtr<CefProcessMessage> message
) override
{
CEF_REQUIRE_UI_THREAD();
return browser_msg_router_
? browser_msg_router_->OnProcessMessageReceived(
browser,
frame,
source_process,
message
)
: false;
}
// CefLifeSpanHandler Methods:
void OnAfterCreated(CefRefPtr<CefBrowser> browser) override
{
CEF_REQUIRE_UI_THREAD();
if (src->listen_for_js_signals && !browser_msg_router_) {
// Create the browser-side router for query handling.
CefMessageRouterConfig config;
config.js_query_function = "gstSendMsg";
config.js_cancel_function = "gstCancelMsg";
browser_msg_router_ = CefMessageRouterBrowserSide::Create(config);
// Register handlers with the router.
browser_msg_handler_.reset(new MessageHandler(src));
browser_msg_router_->AddHandler(browser_msg_handler_.get(), false);
}
}
virtual void OnBeforeClose(CefRefPtr<CefBrowser> browser) override
{
src->browser = nullptr;
g_mutex_lock (&src->state_lock);
src->state = CEF_SRC_CLOSED;
g_cond_signal (&src->state_cond);
g_mutex_unlock(&src->state_lock);
g_mutex_lock(&init_lock);
g_assert (browsers > 0);
browsers -= 1;
if (browsers == 0) {
CefQuitMessageLoop();
}
g_mutex_unlock (&init_lock);
}
// CefRequestHandler methods:
bool OnBeforeBrowse(
CefRefPtr<CefBrowser> browser,
CefRefPtr<CefFrame> frame,
CefRefPtr<CefRequest> request,
bool user_gesture,
bool is_redirect
) override
{
CEF_REQUIRE_UI_THREAD();
if (browser_msg_router_) browser_msg_router_->OnBeforeBrowse(browser, frame);
return false;
}
virtual void OnRenderProcessTerminated(CefRefPtr<CefBrowser> browser, TerminationStatus status) override
{
CEF_REQUIRE_UI_THREAD();
GST_WARNING_OBJECT (src, "Render subprocess terminated, reloading URL!");
if (browser_msg_router_) browser_msg_router_->OnRenderProcessTerminated(browser);
browser->Reload();
}
// Custom methods:
void MakeBrowser(int)
{
CefWindowInfo window_info;
CefRefPtr<CefBrowser> browser;
CefBrowserSettings browser_settings;
window_info.SetAsWindowless(0);
browser = CefBrowserHost::CreateBrowserSync(
window_info,
this,
std::string(src->url),
browser_settings,
nullptr,
nullptr
);
g_mutex_lock (&init_lock);
g_assert (browsers < G_MAXUINT64);
browsers += 1;
g_mutex_unlock(&init_lock);
browser->GetHost()->SetAudioMuted(true);
src->browser = browser;
g_mutex_lock (&src->state_lock);
src->state = src->listen_for_js_signals ? CEF_SRC_WAITING_FOR_READY : CEF_SRC_OPEN;
g_cond_signal (&src->state_cond);
g_mutex_unlock(&src->state_lock);
}
private:
// Handles the browser side of query routing.
CefRefPtr<CefMessageRouterBrowserSide> browser_msg_router_;
std::unique_ptr<CefMessageRouterBrowserSide::Handler> browser_msg_handler_;
CefRefPtr<CefRenderHandler> render_handler;
CefRefPtr<CefAudioHandler> audio_handler;
CefRefPtr<CefDisplayHandler> display_handler;
public:
GstCefSrc *src;
IMPLEMENT_REFCOUNTING(BrowserClient);
};
/** Browser App methods */
BrowserApp::BrowserApp(GstCefSrc *src) : src(src)
{
}
CefRefPtr<CefBrowserProcessHandler> BrowserApp::GetBrowserProcessHandler()
{
return this;
}
#ifdef __APPLE__
void BrowserApp::OnScheduleMessagePumpWork(int64_t delay_ms)
{
static const int64_t kMaxTimerDelay = 1000.0 / 60.0;
if (workTimer_ != nullptr) {
CFRunLoopTimerInvalidate(workTimer_);
workTimer_ = nullptr;
}
if (cef_status == CEF_STATUS_SHUTTING_DOWN) return;
if (delay_ms <= 0) {
// Execute the work immediately.
gst_cef_loop();
// Schedule more work later.
OnScheduleMessagePumpWork(kMaxTimerDelay);
} else {
int64_t timer_delay_ms = delay_ms;
// Never wait longer than the maximum allowed time.
if (timer_delay_ms > kMaxTimerDelay) timer_delay_ms = kMaxTimerDelay;
workTimer_ = gst_cef_domessagework((double)timer_delay_ms * (1.0 / 1000.0));
CFRunLoopAddTimer(CFRunLoopGetMain(), workTimer_, kCFRunLoopDefaultMode);
}
}
#endif
void BrowserApp::OnBeforeCommandLineProcessing(const CefString &process_type,
CefRefPtr<CefCommandLine> command_line)
{
command_line->AppendSwitchWithValue("autoplay-policy", "no-user-gesture-required");
command_line->AppendSwitch("enable-media-stream");
command_line->AppendSwitch("disable-dev-shm-usage"); /* https://github.com/GoogleChrome/puppeteer/issues/1834 */
command_line->AppendSwitch("enable-begin-frame-scheduling"); /* https://bitbucket.org/chromiumembedded/cef/issues/1368 */
#ifdef __APPLE__
command_line->AppendSwitch("off-screen-rendering-enabled");
if (src->gpu) {
GST_WARNING_OBJECT(src, "GPU rendering is known not to work on macOS. Disabling it now. See https://github.com/chromiumembedded/cef/issues/3322 and https://magpcss.org/ceforum/viewtopic.php?f=6&t=19397");
src->gpu = FALSE;
}
#endif
if (!src->gpu) {
// Optimize for no gpu usage
command_line->AppendSwitch("disable-gpu");
command_line->AppendSwitch("disable-gpu-compositing");
}
if (src->chromium_debug_port >= 0) {
command_line->AppendSwitchWithValue("remote-debugging-port", g_strdup_printf ("%i", src->chromium_debug_port));
}
if (src->chrome_extra_flags) {
gchar **flags_list = g_strsplit ((const gchar *) src->chrome_extra_flags, ",", -1);
guint i;
for (i = 0; i < g_strv_length (flags_list); i++) {
gchar **switch_value = g_strsplit ((const gchar *) flags_list[i], "=", -1);
if (g_strv_length (switch_value) > 1) {
GST_INFO_OBJECT (src, "Adding switch with value %s=%s", switch_value[0], switch_value[1]);
command_line->AppendSwitchWithValue (switch_value[0], switch_value[1]);
} else {
GST_INFO_OBJECT (src, "Adding flag %s", flags_list[i]);
command_line->AppendSwitch (flags_list[i]);
}
g_strfreev (switch_value);
}
g_strfreev (flags_list);
}
}
/** cefsrc (Gstreamer) methods */
static GstFlowReturn gst_cef_src_create(GstPushSrc *push_src, GstBuffer **buf)
{
GstCefSrc *src = GST_CEF_SRC (push_src);
GList *tmp;
GST_OBJECT_LOCK (src);
if (src->audio_events) {
for (tmp = src->audio_events; tmp; tmp = tmp->next) {
gst_pad_push_event (GST_BASE_SRC_PAD (src), (GstEvent *) tmp->data);
}
g_list_free (src->audio_events);
src->audio_events = NULL;
}
g_assert (src->current_buffer);
*buf = gst_buffer_copy (src->current_buffer);
if (src->audio_buffers) {
gst_buffer_add_cef_audio_meta (*buf, src->audio_buffers);
src->audio_buffers = NULL;
}
GST_BUFFER_PTS (*buf) = gst_util_uint64_scale (src->n_frames, src->vinfo.fps_d * GST_SECOND, src->vinfo.fps_n);
GST_BUFFER_DURATION (*buf) = gst_util_uint64_scale (GST_SECOND, src->vinfo.fps_d, src->vinfo.fps_n);
src->n_frames++;
GST_OBJECT_UNLOCK (src);
return GST_FLOW_OK;
}
static void*
gst_cef_shutdown(void *)
{
#ifdef __APPLE__
CefQuitMessageLoop();
#endif
g_mutex_lock (&init_lock);
CefShutdown();
cef_status = CEF_STATUS_NOT_LOADED;
g_cond_broadcast (&init_cond);
g_mutex_unlock (&init_lock);
return nullptr;
}
/* Once we have started a first cefsrc for this process, we start
* a UI thread and never shut it down. We could probably refine this
* to stop and restart the thread as needed, but this updated approach
* now no longer requires a main loop to be running, doesn't crash
* when one is running either with CEF 86+, and allows for multiple
* concurrent cefsrc instances.
*/
static gpointer
run_cef (GstCefSrc *src)
{
#ifdef G_OS_WIN32
HINSTANCE hInstance = GetModuleHandle(NULL);
CefMainArgs args(hInstance);
#else
CefMainArgs args(0, NULL);
#endif
CefSettings settings;
CefRefPtr<BrowserApp> app;
CefWindowInfo window_info;
CefBrowserSettings browserSettings;
settings.no_sandbox = !src->sandbox;
settings.windowless_rendering_enabled = true;
settings.log_severity = src->log_severity;
settings.multi_threaded_message_loop = false;
#ifdef __APPLE__
settings.external_message_pump = true;
#endif
GST_INFO_OBJECT(src, "Initializing CEF");
gchar* base_path = get_plugin_base_path();
// If not absolute path append to current_dir
if (!g_path_is_absolute(base_path)) {
gchar* current_dir = g_get_current_dir();
gchar* old_base_path = base_path;
base_path = g_build_filename(current_dir, base_path, nullptr);
g_free(current_dir);
g_free(old_base_path);
}
#ifdef __APPLE__
gchar* browser_subprocess_path = g_build_filename(base_path, "gstcefsubprocess.app/Contents/MacOS/gstcefsubprocess", nullptr);
#else
gchar* browser_subprocess_path = g_build_filename(base_path, "gstcefsubprocess", nullptr);
#endif
if (const gchar *custom_subprocess_path = g_getenv ("GST_CEF_SUBPROCESS_PATH")) {
g_setenv ("CEF_SUBPROCESS_PATH", browser_subprocess_path, TRUE);
g_free (browser_subprocess_path);
browser_subprocess_path = g_strdup (custom_subprocess_path);
}
GST_DEBUG_OBJECT(src, "CEF subprocess: %s", browser_subprocess_path);
CefString(&settings.browser_subprocess_path).FromASCII(browser_subprocess_path);
g_free(browser_subprocess_path);
#ifdef __APPLE__
const std::string framework_folder = []() {
std::string framework = gst_cef_get_framework_path(false);
const auto split = framework.find_last_of('/');
return framework.substr(0, split);
}();
GST_DEBUG_OBJECT(src, "CEF framework_dir_path: %s", framework_folder.c_str());
CefString(&settings.framework_dir_path).FromString(framework_folder);
const std::string main_bundle_folder = [&](){
uint32_t size = 0;
_NSGetExecutablePath(nullptr, &size);
std::vector<char> host(size);
_NSGetExecutablePath(host.data(), &size);
auto host2 = std::unique_ptr<char>(realpath(host.data(), nullptr));
GST_DEBUG_OBJECT(src, "Main executable path: %s", host2.get());
assert(size != 0);
std::string host3(host2.get());
const auto split = host3.find("Contents/MacOS");
assert(split != std::string::npos);
return host3.substr(0, split);
}();
CefString(&settings.main_bundle_path).FromString(main_bundle_folder);
#endif
gchar *locales_dir_path = g_build_filename(base_path, "locales", nullptr);
CefString(&settings.locales_dir_path).FromASCII(locales_dir_path);
if (src->js_flags != NULL) {
CefString(&settings.javascript_flags).FromASCII(src->js_flags);
}
if (src->cef_cache_location != NULL) {
CefString(&settings.cache_path).FromASCII(src->cef_cache_location);
}
g_free(base_path);
g_free(locales_dir_path);
app = new BrowserApp(src);
if (!CefInitialize(args, settings, app, nullptr)) {
GST_ERROR ("Failed to initialize CEF");
/* unblock start () */
g_mutex_lock (&init_lock);
cef_status = CEF_STATUS_FAILURE;
g_cond_broadcast (&init_cond);
g_mutex_unlock (&init_lock);
goto done;
}
g_mutex_lock (&init_lock);
cef_status = CEF_STATUS_INITIALIZED;
g_cond_broadcast (&init_cond);
g_mutex_unlock (&init_lock);
#ifndef __APPLE__
CefRunMessageLoop();
gst_cef_shutdown(nullptr);
#endif
done:
return NULL;
}
static GstStateChangeReturn
gst_cef_src_change_state(GstElement *src, GstStateChange transition)
{
GstStateChangeReturn result = GST_STATE_CHANGE_SUCCESS;
switch(transition)
{
case GST_STATE_CHANGE_NULL_TO_READY:
{
g_mutex_lock (&init_lock);
// Wait till a previous CEF is dismantled or completes initialization
while (cef_status & CEF_STATUS_MASK_TRANSITIONING)
g_cond_wait (&init_cond, &init_lock);
if (cef_status == CEF_STATUS_FAILURE) {
// BAIL OUT, CEF is not loaded.
result = GST_STATE_CHANGE_FAILURE;
} else if (cef_status == CEF_STATUS_NOT_LOADED) {
cef_status = CEF_STATUS_INITIALIZING;
/* Initialize Chromium Embedded Framework */
#ifdef __APPLE__
/* in the main thread as per Cocoa */
if (pthread_main_np()) {
g_mutex_unlock (&init_lock);
run_cef ((GstCefSrc*) src);
g_mutex_lock (&init_lock);
} else {
dispatch_async_f(dispatch_get_main_queue(), (GstCefSrc*)src, (dispatch_function_t)&run_cef);
while (cef_status == CEF_STATUS_INITIALIZING)
g_cond_wait (&init_cond, &init_lock);
}
#else
/* in a separate UI thread */
thread = g_thread_new("cef-ui-thread", (GThreadFunc) run_cef, (GstCefSrc*)src);
while (cef_status == CEF_STATUS_INITIALIZING)
g_cond_wait (&init_cond, &init_lock);
#endif
if (cef_status & ~CEF_STATUS_MASK_INITIALIZED) {
// BAIL OUT, CEF is not loaded.
result = GST_STATE_CHANGE_FAILURE;
#ifndef __APPLE__
g_thread_join(thread);
thread = nullptr;
#endif
}
}
g_mutex_unlock(&init_lock);
break;
}
case GST_STATE_CHANGE_READY_TO_NULL:
{
g_mutex_lock (&init_lock);
while (cef_status & CEF_STATUS_MASK_TRANSITIONING)
g_cond_wait (&init_cond, &init_lock);
/* At that point the element holds the lock and knows no status change is happening */
if (browsers == 0 && cef_status == CEF_STATUS_INITIALIZED) {
/* This element is the one in charge of shutting down */
cef_status = CEF_STATUS_SHUTTING_DOWN;
#ifdef __APPLE__
/* in the main thread as per Cocoa */
if (pthread_main_np()) {
g_mutex_unlock (&init_lock);
gst_cef_shutdown (nullptr);
g_mutex_lock (&init_lock);
} else {
dispatch_async_f(dispatch_get_main_queue(), (GstCefSrc*)src, (dispatch_function_t)&gst_cef_shutdown);
while (cef_status == CEF_STATUS_SHUTTING_DOWN)
g_cond_wait (&init_cond, &init_lock);
}
#else
// the UI thread handles it through the message loop return,
// this MUST NOT let GStreamer conduct unwind ops until CEF is truly dead
while (cef_status == CEF_STATUS_SHUTTING_DOWN)
g_cond_wait (&init_cond, &init_lock);
g_thread_join(thread);
thread = nullptr;
#endif
}
g_mutex_unlock (&init_lock);
break;
}
default:
break;
}
if (result == GST_STATE_CHANGE_FAILURE) return result;
result = GST_ELEMENT_CLASS(parent_class)->change_state(src, transition);
return result;
}
static gboolean
gst_cef_src_start(GstBaseSrc *base_src)
{
gboolean ret = FALSE;
GstCefSrc *src = GST_CEF_SRC (base_src);
GST_ELEMENT_PROGRESS(src, START, "open", ("Creating CEF browser client"));
CefRefPtr<BrowserClient> browserClient = new BrowserClient(src);
gulong browser_id = browsers;
/* Make sure CEF is initialized before posting a task */
g_mutex_lock (&init_lock);
while (cef_status & ~CEF_STATUS_MASK_INITIALIZED)
g_cond_wait (&init_cond, &init_lock);
g_mutex_unlock (&init_lock);
if (cef_status == CEF_STATUS_FAILURE) {
GST_ELEMENT_PROGRESS(src, ERROR, "open", ("CEF in failed state"));
goto done;
}
GST_OBJECT_LOCK (src);
src->n_frames = 0;
GST_OBJECT_UNLOCK (src);
GST_ELEMENT_PROGRESS(src, CONTINUE, "open", ("Creating CEF browser (#%lu)...", browser_id));
#ifdef __APPLE__
if (pthread_main_np()) {
/* in the main thread as per Cocoa */
browserClient->MakeBrowser(0);
} else {
#endif
CefPostTask(TID_UI, base::BindOnce(&BrowserClient::MakeBrowser, browserClient.get(), 0));
/* And wait for this src's browser to have been created */
GST_ELEMENT_PROGRESS(src, CONTINUE, "open", ("Waiting for CEF browser initialization..."));
g_mutex_lock(&src->state_lock);
while (!CefSrcStateIsOpen(src->state))
g_cond_wait (&src->state_cond, &src->state_lock);
g_mutex_unlock (&src->state_lock);
#ifdef __APPLE__
}
#endif
if (src->listen_for_js_signals) {
g_mutex_lock (&src->state_lock);
while (src->state == CEF_SRC_WAITING_FOR_READY)
g_cond_wait (&src->state_cond, &src->state_lock);
g_mutex_unlock (&src->state_lock);
}
ret = src->browser != NULL;
if (ret) {
GST_ELEMENT_PROGRESS(
src, COMPLETE, "open",
("CEF browser created (#%lu)", browser_id)
);
} else {
GST_ELEMENT_PROGRESS(
src, ERROR, "open",
("CEF browser failed to create (#%lu)", browser_id)
);
}
done:
return ret;
}
static void
gst_cef_src_close_browser(GstCefSrc *src)
{
src->browser->GetHost()->CloseBrowser(true);
}
static gboolean
gst_cef_src_stop (GstBaseSrc *base_src)
{
GstCefSrc *src = GST_CEF_SRC (base_src);
GST_INFO_OBJECT (src, "Stopping");
if (src->browser) {
gst_cef_src_close_browser(src);
#ifdef __APPLE__
if (!pthread_main_np()) {
#endif
/* And wait for this src's browser to have been closed */
g_mutex_lock(&src->state_lock);