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Frame grabber threaded initialization

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Start gstreamer init of frame grabber in a thread and wait future return from initializer before switching to active recording mode.
This commit is contained in:
Bruno Herbelin
2021-12-02 11:45:22 +01:00
parent b97fd06f2a
commit 68b2c5e0c1
8 changed files with 100 additions and 79 deletions
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54
Recorder.cpp
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@@ -43,11 +43,11 @@ PNGRecorder::PNGRecorder() : FrameGrabber()
{
}
void PNGRecorder::init(GstCaps *caps)
std::string PNGRecorder::init(GstCaps *caps)
{
// ignore
if (caps == nullptr)
return;
return std::string("Invalid caps");
// create a gstreamer pipeline
std::string description = "appsrc name=src ! videoconvert ! pngenc ! filesink name=sink";
@@ -56,10 +56,10 @@ void PNGRecorder::init(GstCaps *caps)
GError *error = NULL;
pipeline_ = gst_parse_launch (description.c_str(), &error);
if (error != NULL) {
Log::Warning("PNG Capture Could not construct pipeline %s:\n%s", description.c_str(), error->message);
std::string msg = std::string("PNG Capture Could not construct pipeline ") + description + "\n" + std::string(error->message);
g_clear_error (&error);
finished_ = true;
return;
return msg;
}
// verify location path (path is always terminated by the OS dependent separator)
@@ -102,24 +102,21 @@ void PNGRecorder::init(GstCaps *caps)
}
else {
Log::Warning("PNG Capture Could not configure source");
finished_ = true;
return;
return std::string("PNG Capture : Failed to configure frame grabber.");
}
// start pipeline
GstStateChangeReturn ret = gst_element_set_state (pipeline_, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE) {
Log::Warning("PNG Capture Could not record %s", filename_.c_str());
finished_ = true;
return;
return std::string("PNG Capture : Failed to start frame grabber.");
}
// all good
Log::Info("PNG Capture started.");
initialized_ = true;
// start recording !!
active_ = true;
return std::string("PNG Capture started ");
}
void PNGRecorder::terminate()
@@ -289,11 +286,11 @@ VideoRecorder::VideoRecorder() : FrameGrabber()
}
void VideoRecorder::init(GstCaps *caps)
std::string VideoRecorder::init(GstCaps *caps)
{
// ignore
if (caps == nullptr)
return;
return std::string("Invalid caps");
// apply settings
buffering_size_ = MAX( MIN_BUFFER_SIZE, buffering_preset_value[Settings::application.record.buffering_mode]);
@@ -307,10 +304,10 @@ void VideoRecorder::init(GstCaps *caps)
// test for a hardware accelerated encoder
if (Settings::application.render.gpu_decoding &&
#if GST_GL_HAVE_PLATFORM_GLX
//#if GST_GL_HAVE_PLATFORM_GLX
glGetString(GL_VENDOR)[0] == 'N' && glGetString(GL_VENDOR)[1] == 'V' && // TODO; hack to test for NVIDIA GPU support
#endif
// glGetString(GL_VENDOR)[0] == 'N' && glGetString(GL_VENDOR)[1] == 'V' && // TODO; hack to test for NVIDIA GPU support
//#endif
GstToolkit::has_feature(hardware_encoder[Settings::application.record.profile]) ) {
description += hardware_profile_description[Settings::application.record.profile];
@@ -345,11 +342,10 @@ void VideoRecorder::init(GstCaps *caps)
GError *error = NULL;
pipeline_ = gst_parse_launch (description.c_str(), &error);
if (error != NULL) {
Log::Info("Video Recording : Could not construct pipeline %s\n%s", description.c_str(), error->message);
Log::Warning("Video Recording : Failed to initiate GStreamer.");
std::string msg = std::string("Video Recording : Could not construct pipeline ") + description + "\n" + std::string(error->message);
g_clear_error (&error);
finished_ = true;
return;
return msg;
}
// setup file sink
@@ -399,24 +395,22 @@ void VideoRecorder::init(GstCaps *caps)
}
else {
Log::Warning("Video Recording : Failed to configure frame grabber.");
finished_ = true;
return;
return std::string("Video Recording : Failed to configure frame grabber.");
}
// start recording
GstStateChangeReturn ret = gst_element_set_state (pipeline_, GST_STATE_PLAYING);
if (ret == GST_STATE_CHANGE_FAILURE) {
Log::Warning("Video Recording : Failed to start frame grabber.");
finished_ = true;
return;
return std::string("Video Recording : Failed to start frame grabber.");
}
// all good
Log::Info("Video Recording started (%s)", profile_name[Settings::application.record.profile]);
initialized_ = true;
return std::string("Video Recording started ") + profile_name[Settings::application.record.profile];
// start recording !!
active_ = true;
}
void VideoRecorder::terminate()
@@ -445,10 +439,8 @@ void VideoRecorder::terminate()
std::string VideoRecorder::info() const
{
if (active_)
return FrameGrabber::info();
else if (!endofstream_)
if (initialized_ && !active_ && !endofstream_)
return "Saving file...";
else
return "...";
return FrameGrabber::info();
}