mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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354 lines
11 KiB
C++
354 lines
11 KiB
C++
/*
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* GStreamer
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* Copyright (C) 2008-2009 Julien Isorce <julien.isorce@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/video/videooverlay.h>
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#include <gst/video/video.h>
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#include <GL/gl.h>
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#include "pipeline.h"
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#define GST_MAP_GL (GST_MAP_FLAG_LAST << 1)
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Pipeline::Pipeline(const WId id, const QString videoLocation):
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m_winId(id),
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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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m_glimagesink(NULL)
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{
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create();
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}
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Pipeline::~Pipeline()
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{
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}
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void Pipeline::create()
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{
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qDebug("Loading video: %s", m_videoLocation.toLatin1().data());
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gst_init (NULL, NULL);
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#ifdef WIN32
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m_loop = g_main_loop_new (NULL, FALSE);
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#endif
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m_pipeline = gst_pipeline_new ("pipeline");
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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_set_sync_handler (m_bus, (GstBusSyncHandler) create_window, this, NULL);
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gst_object_unref (m_bus);
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GstElement* videosrc = gst_element_factory_make ("filesrc", "filesrc0");
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GstElement* decodebin = gst_element_factory_make ("decodebin", "decodebin0");
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m_glimagesink = gst_element_factory_make ("glimagesink", "sink0");
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if (!videosrc || !decodebin || !m_glimagesink )
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{
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qDebug ("one element could not be found");
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return;
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}
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g_object_set(G_OBJECT(videosrc), "num-buffers", 800, NULL);
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g_object_set(G_OBJECT(videosrc), "location", m_videoLocation.toLatin1().data(), NULL);
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g_signal_connect(G_OBJECT(m_glimagesink), "client-reshape", G_CALLBACK (reshapeCallback), NULL);
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g_signal_connect(G_OBJECT(m_glimagesink), "client-draw", G_CALLBACK (drawCallback), NULL);
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gst_bin_add_many (GST_BIN (m_pipeline), videosrc, decodebin, m_glimagesink, NULL);
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gst_element_link_pads (videosrc, "src", decodebin, "sink");
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g_signal_connect (decodebin, "pad-added", G_CALLBACK (cb_new_pad), this);
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}
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void Pipeline::start()
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{
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GstStateChangeReturn ret = gst_element_set_state (m_pipeline, GST_STATE_PLAYING);
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if (ret == GST_STATE_CHANGE_FAILURE)
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{
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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 (m_bus, GST_MESSAGE_ERROR, 0);
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if (msg)
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{
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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 WIN32
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g_main_loop_run(m_loop);
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#endif
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}
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//we don't want a thread safe stop in this example
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void Pipeline::stop()
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{
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#ifdef WIN32
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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 Pipeline::unconfigure() const
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{
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gst_element_set_state (m_pipeline, GST_STATE_NULL);
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gst_object_unref (m_pipeline);
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}
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void Pipeline::show()
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{
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emit showRequested();
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}
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//redraw the current frame in the drawable
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void Pipeline::doExpose() const
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{
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if (m_pipeline && m_glimagesink)
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gst_video_overlay_expose (GST_VIDEO_OVERLAY (m_glimagesink));
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}
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//post message to g_main_loop in order to call expose
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//in the gt thread
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void Pipeline::exposeRequested()
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{
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g_idle_add(cb_expose, this);
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}
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//rotate the cube
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void Pipeline::doRotate()
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{
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m_xrot += 3.0f;
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m_yrot += 2.0f;
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m_zrot += 4.0f;
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}
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//post message to g_main_loop in order to call rotate
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//in the gt thread
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void Pipeline::rotateRequested()
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{
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g_idle_add(cb_rotate, this);
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}
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//-----------------------------------------------------------------------
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//----------------------------- static members --------------------------
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//-----------------------------------------------------------------------
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float Pipeline::m_xrot = 0;
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float Pipeline::m_yrot = 0;
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float Pipeline::m_zrot = 0;
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//client reshape callback
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gboolean Pipeline::reshapeCallback (void *sink, void *context, guint width, guint height, gpointer data)
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{
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glViewport(0, 0, width, height);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glMatrixMode(GL_MODELVIEW);
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return TRUE;
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}
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//client draw callback
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gboolean Pipeline::drawCallback (void * sink, void *context, GstSample * sample, gpointer data)
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{
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static GTimeVal current_time;
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static glong last_sec = current_time.tv_sec;
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static gint nbFrames = 0;
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GstVideoFrame v_frame;
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GstVideoInfo v_info;
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guint texture = 0;
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GstBuffer *buf = gst_sample_get_buffer (sample);
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GstCaps *caps = gst_sample_get_caps (sample);
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gst_video_info_from_caps (&v_info, caps);
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if (!gst_video_frame_map (&v_frame, &v_info, buf, (GstMapFlags) (GST_MAP_READ | GST_MAP_GL))) {
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g_warning ("Failed to map the video buffer");
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return TRUE;
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}
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texture = *(guint *) v_frame.data[0];
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g_get_current_time (¤t_time);
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nbFrames++ ;
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if ((current_time.tv_sec - last_sec) >= 1)
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{
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qDebug ("GRAPHIC FPS = %d", nbFrames);
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nbFrames = 0;
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last_sec = current_time.tv_sec;
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}
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glEnable(GL_DEPTH_TEST);
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glEnable (GL_TEXTURE_2D);
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glBindTexture (GL_TEXTURE_2D, texture);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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glTexEnvi (GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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glScalef(0.5f,0.5f,0.5f);
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glRotatef(m_xrot,1.0f,0.0f,0.0f);
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glRotatef(m_yrot,0.0f,1.0f,0.0f);
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glRotatef(m_zrot,0.0f,0.0f,1.0f);
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glBegin(GL_QUADS);
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// Front Face
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
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// Back Face
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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// Top Face
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
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// Bottom Face
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
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// Right face
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glTexCoord2f(0.0f, 0.0f); glVertex3f( 1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f( 1.0f, 1.0f, -1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f( 1.0f, 1.0f, 1.0f);
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glTexCoord2f(1.0f, 0.0f); glVertex3f( 1.0f, -1.0f, 1.0f);
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// Left Face
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glTexCoord2f(1.0f, 0.0f); glVertex3f(-1.0f, -1.0f, -1.0f);
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glTexCoord2f(0.0f, 0.0f); glVertex3f(-1.0f, -1.0f, 1.0f);
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glTexCoord2f(0.0f, 1.0f); glVertex3f(-1.0f, 1.0f, 1.0f);
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glTexCoord2f(1.0f, 1.0f); glVertex3f(-1.0f, 1.0f, -1.0f);
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glEnd();
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gst_video_frame_unmap (&v_frame);
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return TRUE;
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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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switch (GST_MESSAGE_TYPE (msg))
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{
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case GST_MESSAGE_EOS:
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qDebug ("End-of-stream");
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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 *debug = NULL;
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GError *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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{
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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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void Pipeline::cb_new_pad (GstElement* decodebin, GstPad* pad, Pipeline* p)
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{
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GstElement* glimagesink = p->getVideoSink();
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GstPad* glpad = gst_element_get_static_pad (glimagesink, "sink");
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//only link once
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if (GST_PAD_IS_LINKED (glpad))
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{
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gst_object_unref (glpad);
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return;
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}
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GstCaps* caps = gst_pad_get_current_caps (pad);
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GstStructure* str = gst_caps_get_structure (caps, 0);
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if (!g_strrstr (gst_structure_get_name (str), "video"))
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{
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gst_caps_unref (caps);
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gst_object_unref (glpad);
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return;
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}
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gst_caps_unref (caps);
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GstPadLinkReturn ret = gst_pad_link (pad, glpad);
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if (ret != GST_PAD_LINK_OK)
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g_warning ("Failed to link with decodebin!\n");
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p->show();
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}
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gboolean Pipeline::cb_expose (gpointer data)
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{
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((Pipeline*)data)->doExpose();
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return FALSE;
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}
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gboolean Pipeline::cb_rotate (gpointer data)
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{
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((Pipeline*)data)->doRotate();
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return FALSE;
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}
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GstBusSyncReply Pipeline::create_window (GstBus* bus, GstMessage* message, const Pipeline* p)
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{
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// ignore anything but 'prepare-window-handle' element messages
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if (GST_MESSAGE_TYPE (message) != GST_MESSAGE_ELEMENT)
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return GST_BUS_PASS;
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if (!gst_is_video_overlay_prepare_window_handle_message (message))
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return GST_BUS_PASS;
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qDebug ("setting window handle");
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//Passing 0 as the window_handle will tell the overlay to stop using that window and create an internal one.
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//In the directdrawsink's gst_video_overlay_set_window_handle implementation, window_handle (parameter 2) is casted to HWND before it used.
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gst_video_overlay_set_window_handle (GST_VIDEO_OVERLAY (GST_MESSAGE_SRC (message)), (guintptr)p->winId());
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gst_message_unref (message);
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return GST_BUS_DROP;
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}
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