mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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e6823576ce
-Waggregate-return: used by some Qt clases extensively and not super useful for this example. Supress it. warning: "GL_GLEXT_VERSION" redefined: Perform the same workaround as qmlglsink by defining the old gl/GL.h header guard if the new GL/gl.h guard exists. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/752>
231 lines
6.5 KiB
C++
231 lines
6.5 KiB
C++
/*
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* GStreamer
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* Copyright (C) 2009 Julien Isorce <julien.isorce@gmail.com>
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* Copyright (C) 2009 Andrey Nechypurenko <andreynech@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include <gst/gl/gl.h>
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#include "../gl-compat-defines.h"
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#include "pipeline.h"
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Pipeline::Pipeline (GstGLDisplay *display,
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GstGLContext * context, const QString & videoLocation, QObject * parent)
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:
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QObject (parent),
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m_videoLocation (videoLocation),
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m_loop (NULL),
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m_bus (NULL),
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m_pipeline (NULL)
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{
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this->display = display;
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this->context = context;
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this->configure ();
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}
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Pipeline::~Pipeline ()
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{
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}
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void
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Pipeline::configure ()
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{
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#ifdef Q_WS_WIN
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m_loop = g_main_loop_new (NULL, FALSE);
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#endif
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if (m_videoLocation.isEmpty ()) {
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qDebug ("No video file specified. Using video test source.");
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m_pipeline =
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GST_PIPELINE (gst_parse_launch
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("videotestsrc ! "
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"video/x-raw, width=640, height=480, "
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"framerate=(fraction)30/1 ! "
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"glupload ! gleffects effect=5 ! fakesink sync=1", NULL));
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} else {
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QByteArray ba = m_videoLocation.toLocal8Bit ();
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qDebug ("Loading video: %s", ba.data ());
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gchar *pipeline = g_strdup_printf ("filesrc name=f ! "
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"decodebin ! gleffects effect=5 ! " "fakesink sync=1");
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m_pipeline = GST_PIPELINE (gst_parse_launch (pipeline, NULL));
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GstElement *f = gst_bin_get_by_name (GST_BIN (m_pipeline), "f");
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g_object_set (G_OBJECT (f), "location", ba.data (), NULL);
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gst_object_unref (GST_OBJECT (f));
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g_free (pipeline);
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}
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m_bus = gst_pipeline_get_bus (GST_PIPELINE (m_pipeline));
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gst_bus_add_watch (m_bus, (GstBusFunc) bus_call, this);
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gst_bus_enable_sync_message_emission (m_bus);
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g_signal_connect (m_bus, "sync-message", G_CALLBACK (sync_bus_call), this);
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gst_object_unref (m_bus);
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gst_element_set_state (GST_ELEMENT (this->m_pipeline), GST_STATE_PAUSED);
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GstState state = GST_STATE_PAUSED;
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if (gst_element_get_state (GST_ELEMENT (this->m_pipeline),
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&state, NULL, GST_CLOCK_TIME_NONE)
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!= GST_STATE_CHANGE_SUCCESS) {
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qDebug ("failed to pause pipeline");
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return;
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}
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}
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void
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Pipeline::start ()
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{
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// set a callback to retrieve the gst gl textures
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GstElement *fakesink = gst_bin_get_by_name (GST_BIN (this->m_pipeline),
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"fakesink0");
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g_object_set (G_OBJECT (fakesink), "signal-handoffs", TRUE, NULL);
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g_signal_connect (fakesink, "handoff", G_CALLBACK (on_gst_buffer), this);
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gst_object_unref (fakesink);
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GstStateChangeReturn ret =
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gst_element_set_state (GST_ELEMENT (this->m_pipeline), GST_STATE_PLAYING);
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if (ret == GST_STATE_CHANGE_FAILURE) {
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qDebug ("Failed to start up pipeline!");
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/* check if there is an error message with details on the bus */
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GstMessage *msg = gst_bus_poll (this->m_bus, GST_MESSAGE_ERROR, 0);
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if (msg) {
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GError *err = NULL;
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gst_message_parse_error (msg, &err, NULL);
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qDebug ("ERROR: %s", err->message);
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g_error_free (err);
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gst_message_unref (msg);
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}
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return;
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}
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#ifdef Q_WS_WIN
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g_main_loop_run (m_loop);
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#endif
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}
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/* fakesink handoff callback */
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void
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Pipeline::on_gst_buffer (GstElement * element,
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GstBuffer * buf, GstPad * pad, Pipeline * p)
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{
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Q_UNUSED (pad)
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Q_UNUSED (element)
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/* ref then push buffer to use it in qt */
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gst_buffer_ref (buf);
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p->queue_input_buf.put (buf);
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if (p->queue_input_buf.size () > 3)
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p->notifyNewFrame ();
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/* pop then unref buffer we have finished to use in qt */
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if (p->queue_output_buf.size () > 3) {
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GstBuffer *buf_old = (p->queue_output_buf.get ());
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if (buf_old)
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gst_buffer_unref (buf_old);
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}
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}
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void
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Pipeline::stop ()
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{
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#ifdef Q_WS_WIN
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g_main_loop_quit (m_loop);
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#else
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emit stopRequested ();
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#endif
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}
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void
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Pipeline::unconfigure ()
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{
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gst_element_set_state (GST_ELEMENT (this->m_pipeline), GST_STATE_NULL);
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GstBuffer *buf;
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while (this->queue_input_buf.size ()) {
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buf = (GstBuffer *) (this->queue_input_buf.get ());
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gst_buffer_unref (buf);
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}
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while (this->queue_output_buf.size ()) {
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buf = (GstBuffer *) (this->queue_output_buf.get ());
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gst_buffer_unref (buf);
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}
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gst_object_unref (m_pipeline);
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}
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gboolean Pipeline::bus_call (GstBus * bus, GstMessage * msg, Pipeline * p)
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{
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Q_UNUSED (bus)
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switch (GST_MESSAGE_TYPE (msg)) {
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case GST_MESSAGE_EOS:
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qDebug ("End-of-stream received. Stopping.");
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p->stop ();
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break;
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case GST_MESSAGE_ERROR:
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{
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gchar *
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debug = NULL;
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GError *
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err = NULL;
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gst_message_parse_error (msg, &err, &debug);
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qDebug ("Error: %s", err->message);
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g_error_free (err);
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if (debug) {
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qDebug ("Debug deails: %s", debug);
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g_free (debug);
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}
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p->stop ();
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break;
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}
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default:
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break;
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}
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return TRUE;
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}
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gboolean Pipeline::sync_bus_call (GstBus * bus, GstMessage * msg, Pipeline * p)
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{
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switch (GST_MESSAGE_TYPE (msg)) {
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case GST_MESSAGE_NEED_CONTEXT:
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{
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const gchar *
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context_type;
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gst_message_parse_context_type (msg, &context_type);
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g_print ("got need context %s\n", context_type);
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if (g_strcmp0 (context_type, GST_GL_DISPLAY_CONTEXT_TYPE) == 0) {
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GstContext *display_context = gst_context_new (GST_GL_DISPLAY_CONTEXT_TYPE, TRUE);
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gst_context_set_gl_display (display_context, p->display);
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gst_element_set_context (GST_ELEMENT (msg->src), display_context);
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} else if (g_strcmp0 (context_type, "gst.gl.app_context") == 0) {
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GstContext *app_context = gst_context_new ("gst.gl.app_context", TRUE);
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GstStructure *s = gst_context_writable_structure (app_context);
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gst_structure_set (s, "context", GST_TYPE_GL_CONTEXT, p->context, NULL);
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gst_element_set_context (GST_ELEMENT (msg->src), app_context);
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}
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break;
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}
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default:
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break;
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}
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return FALSE;
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}
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