/* * GStreamer * Copyright (C) 2003 Julien Moutte * Copyright (C) 2005,2006,2007 David A. Schleef * Copyright (C) 2008 Julien Isorce * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-glimagesink * * glimagesink renders video frames to a drawable on a local or remote * display using OpenGL. This element can receive a Window ID from the * application through the VideoOverlay interface and will then render video * frames in this drawable. * If no Window ID was provided by the application, the element will * create its own internal window and render into it. * * * Scaling * * Depends on the driver, OpenGL handles hardware accelerated * scaling of video frames. This means that the element will just accept * incoming video frames no matter their geometry and will then put them to the * drawable scaling them on the fly. Using the #GstGLImageSink:force-aspect-ratio * property it is possible to enforce scaling with a constant aspect ratio, * which means drawing black borders around the video frame. * * * * Events * * Through the gl thread, glimagesink handle some events coming from the drawable * to manage its appearance even when the data is not flowing (GST_STATE_PAUSED). * That means that even when the element is paused, it will receive expose events * from the drawable and draw the latest frame with correct borders/aspect-ratio. * * * * Examples * |[ * gst-launch -v videotestsrc ! "video/x-raw-rgb" ! glimagesink * ]| A pipeline to test hardware scaling. * No special opengl extension is used in this pipeline, that's why it should work * with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3. * |[ * gst-launch -v videotestsrc ! "video/x-raw-yuv, format=(fourcc)I420" ! glimagesink * ]| A pipeline to test hardware scaling and hardware colorspace conversion. * When your driver supports GLSL (OpenGL Shading Language needs OpenGL >= 2.1), * the 4 following format YUY2, UYVY, I420, YV12 and AYUV are converted to RGB32 * through some fragment shaders and using one framebuffer (FBO extension OpenGL >= 1.4). * If your driver does not support GLSL but supports MESA_YCbCr extension then * the you can use YUY2 and UYVY. In this case the colorspace conversion is automatically * made when loading the texture and therefore no framebuffer is used. * |[ * gst-launch -v gltestsrc ! glimagesink * ]| A pipeline 100% OpenGL. * No special opengl extension is used in this pipeline, that's why it should work * with OpenGL >= 1.1. That's the case if you are using the MESA3D driver v1.3. * |[ * gst-plugins-gl/tests/examples/generic/cube * ]| The graphic FPS scene can be greater than the input video FPS. * The graphic scene can be written from a client code through the * two glfilterapp properties. * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include "gstglimagesink.h" GST_DEBUG_CATEGORY (gst_debug_glimage_sink); #define GST_CAT_DEFAULT gst_debug_glimage_sink static void gst_glimage_sink_finalize (GObject * object); static void gst_glimage_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * param_spec); static void gst_glimage_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * param_spec); static gboolean gst_glimage_sink_query (GstElement * element, GstQuery * query); static GstStateChangeReturn gst_glimage_sink_change_state (GstElement * element, GstStateChange transition); static void gst_glimage_sink_get_times (GstBaseSink * bsink, GstBuffer * buf, GstClockTime * start, GstClockTime * end); static gboolean gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps); static GstFlowReturn gst_glimage_sink_render (GstBaseSink * bsink, GstBuffer * buf); static void gst_glimage_sink_video_overlay_init (GstVideoOverlayInterface * iface); static void gst_glimage_sink_set_window_handle (GstVideoOverlay * overlay, guintptr id); static void gst_glimage_sink_expose (GstVideoOverlay * overlay); static GstStaticPadTemplate gst_glimage_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_GL_VIDEO_CAPS) ); enum { ARG_0, ARG_DISPLAY, PROP_CLIENT_RESHAPE_CALLBACK, PROP_CLIENT_DRAW_CALLBACK, PROP_CLIENT_DATA, PROP_FORCE_ASPECT_RATIO, PROP_PIXEL_ASPECT_RATIO }; #define gst_glimage_sink_parent_class parent_class G_DEFINE_TYPE_WITH_CODE (GstGLImageSink, gst_glimage_sink, GST_TYPE_VIDEO_SINK, G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_OVERLAY, gst_glimage_sink_video_overlay_init); GST_DEBUG_CATEGORY_INIT (gst_debug_glimage_sink, "glimagesink", 0, "OpenGL Video Sink")); static void gst_glimage_sink_class_init (GstGLImageSinkClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; GstBaseSinkClass *gstbasesink_class; GstElementClass *element_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; gstbasesink_class = (GstBaseSinkClass *) klass; element_class = GST_ELEMENT_CLASS (klass); gobject_class->set_property = gst_glimage_sink_set_property; gobject_class->get_property = gst_glimage_sink_get_property; g_object_class_install_property (gobject_class, ARG_DISPLAY, g_param_spec_string ("display", "Display", "Display name", NULL, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CLIENT_RESHAPE_CALLBACK, g_param_spec_pointer ("client-reshape-callback", "Client reshape callback", "Define a custom reshape callback in a client code", G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CLIENT_DRAW_CALLBACK, g_param_spec_pointer ("client-draw-callback", "Client draw callback", "Define a custom draw callback in a client code", G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_CLIENT_DATA, g_param_spec_pointer ("client-data", "Client data", "Pass data to the draw and reshape callbacks", G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_FORCE_ASPECT_RATIO, g_param_spec_boolean ("force-aspect-ratio", "Force aspect ratio", "When enabled, scaling will respect original aspect ratio", FALSE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); g_object_class_install_property (gobject_class, PROP_PIXEL_ASPECT_RATIO, g_param_spec_string ("pixel-aspect-ratio", "Pixel Aspect Ratio", "The pixel aspect ratio of the device", "1/1", G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)); gst_element_class_set_details_simple (element_class, "OpenGL video sink", "Sink/Video", "A videosink based on OpenGL", "Julien Isorce "); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&gst_glimage_sink_template)); gobject_class->finalize = gst_glimage_sink_finalize; gstelement_class->change_state = gst_glimage_sink_change_state; gstelement_class->query = GST_DEBUG_FUNCPTR (gst_glimage_sink_query); gstbasesink_class->set_caps = gst_glimage_sink_set_caps; gstbasesink_class->get_times = gst_glimage_sink_get_times; gstbasesink_class->preroll = gst_glimage_sink_render; gstbasesink_class->render = gst_glimage_sink_render; } static void gst_glimage_sink_init (GstGLImageSink * glimage_sink) { glimage_sink->display_name = NULL; glimage_sink->window_id = 0; glimage_sink->new_window_id = 0; glimage_sink->display = NULL; glimage_sink->stored_buffer = NULL; glimage_sink->clientReshapeCallback = NULL; glimage_sink->clientDrawCallback = NULL; glimage_sink->client_data = NULL; glimage_sink->keep_aspect_ratio = FALSE; glimage_sink->par = NULL; } static void gst_glimage_sink_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstGLImageSink *glimage_sink; g_return_if_fail (GST_IS_GLIMAGE_SINK (object)); glimage_sink = GST_GLIMAGE_SINK (object); switch (prop_id) { case ARG_DISPLAY: { g_free (glimage_sink->display_name); glimage_sink->display_name = g_strdup (g_value_get_string (value)); break; } case PROP_CLIENT_RESHAPE_CALLBACK: { glimage_sink->clientReshapeCallback = g_value_get_pointer (value); break; } case PROP_CLIENT_DRAW_CALLBACK: { glimage_sink->clientDrawCallback = g_value_get_pointer (value); break; } case PROP_CLIENT_DATA: { glimage_sink->client_data = g_value_get_pointer (value); break; } case PROP_FORCE_ASPECT_RATIO: { glimage_sink->keep_aspect_ratio = g_value_get_boolean (value); break; } case PROP_PIXEL_ASPECT_RATIO: { g_free (glimage_sink->par); glimage_sink->par = g_new0 (GValue, 1); g_value_init (glimage_sink->par, GST_TYPE_FRACTION); if (!g_value_transform (value, glimage_sink->par)) { g_warning ("Could not transform string to aspect ratio"); gst_value_set_fraction (glimage_sink->par, 1, 1); } break; } default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_glimage_sink_finalize (GObject * object) { GstGLImageSink *glimage_sink; g_return_if_fail (GST_IS_GLIMAGE_SINK (object)); glimage_sink = GST_GLIMAGE_SINK (object); if (glimage_sink->par) { g_free (glimage_sink->par); glimage_sink->par = NULL; } if (glimage_sink->caps) gst_caps_unref (glimage_sink->caps); g_free (glimage_sink->display_name); GST_DEBUG ("finalized"); } static void gst_glimage_sink_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstGLImageSink *glimage_sink; g_return_if_fail (GST_IS_GLIMAGE_SINK (object)); glimage_sink = GST_GLIMAGE_SINK (object); switch (prop_id) { case ARG_DISPLAY: g_value_set_string (value, glimage_sink->display_name); break; case PROP_FORCE_ASPECT_RATIO: g_value_set_boolean (value, glimage_sink->keep_aspect_ratio); break; case PROP_PIXEL_ASPECT_RATIO: if (!glimage_sink->par) { glimage_sink->par = g_new0 (GValue, 1); g_value_init (glimage_sink->par, GST_TYPE_FRACTION); gst_value_set_fraction (glimage_sink->par, 1, 1); } if (!g_value_transform (glimage_sink->par, value)) g_warning ("Could not transform string to aspect ratio"); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean gst_glimage_sink_query (GstElement * element, GstQuery * query) { GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (element); gboolean res = FALSE; switch (GST_QUERY_TYPE (query)) { case GST_QUERY_CUSTOM: { GstStructure *structure = gst_query_writable_structure (query); gst_structure_set (structure, "gstgldisplay", G_TYPE_POINTER, glimage_sink->display, NULL); res = GST_ELEMENT_CLASS (parent_class)->query (element, query); break; } default: res = GST_ELEMENT_CLASS (parent_class)->query (element, query); break; } return res; } /* * GstElement methods */ static GstStateChangeReturn gst_glimage_sink_change_state (GstElement * element, GstStateChange transition) { GstGLImageSink *glimage_sink; GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS; GST_DEBUG ("change state"); glimage_sink = GST_GLIMAGE_SINK (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: if (!glimage_sink->display) { gboolean ok = FALSE; glimage_sink->display = gst_gl_display_new (); /* init opengl context */ ok = gst_gl_display_create_context (glimage_sink->display, 0); if (!ok) { GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND, GST_GL_DISPLAY_ERR_MSG (glimage_sink->display), (NULL)); if (glimage_sink->display) { g_object_unref (glimage_sink->display); glimage_sink->display = NULL; } return GST_STATE_CHANGE_FAILURE; } } break; case GST_STATE_CHANGE_PAUSED_TO_PLAYING: break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); if (ret == GST_STATE_CHANGE_FAILURE) return ret; switch (transition) { case GST_STATE_CHANGE_PLAYING_TO_PAUSED: break; case GST_STATE_CHANGE_PAUSED_TO_READY: { if (glimage_sink->stored_buffer) { gst_buffer_unref (GST_BUFFER_CAST (glimage_sink->stored_buffer)); glimage_sink->stored_buffer = NULL; } if (glimage_sink->display) { g_object_unref (glimage_sink->display); glimage_sink->display = NULL; } glimage_sink->window_id = 0; //but do not reset glimage_sink->new_window_id glimage_sink->fps_n = 0; glimage_sink->fps_d = 1; GST_VIDEO_SINK_WIDTH (glimage_sink) = 0; GST_VIDEO_SINK_HEIGHT (glimage_sink) = 0; } break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; } static void gst_glimage_sink_get_times (GstBaseSink * bsink, GstBuffer * buf, GstClockTime * start, GstClockTime * end) { GstGLImageSink *glimagesink; glimagesink = GST_GLIMAGE_SINK (bsink); if (GST_BUFFER_TIMESTAMP_IS_VALID (buf)) { *start = GST_BUFFER_TIMESTAMP (buf); if (GST_BUFFER_DURATION_IS_VALID (buf)) *end = *start + GST_BUFFER_DURATION (buf); else { if (glimagesink->fps_n > 0) { *end = *start + gst_util_uint64_scale_int (GST_SECOND, glimagesink->fps_d, glimagesink->fps_n); } } } } static gboolean gst_glimage_sink_set_caps (GstBaseSink * bsink, GstCaps * caps) { GstGLImageSink *glimage_sink; gint width; gint height; gboolean ok; gint fps_n, fps_d; gint par_n, par_d; gint display_par_n, display_par_d; guint display_ratio_num, display_ratio_den; GstVideoInfo vinfo; GST_DEBUG ("set caps with %" GST_PTR_FORMAT, caps); glimage_sink = GST_GLIMAGE_SINK (bsink); ok = gst_video_info_from_caps (&vinfo, caps); if (!ok) return FALSE; width = GST_VIDEO_INFO_WIDTH (&vinfo); height = GST_VIDEO_INFO_HEIGHT (&vinfo); /* FIXME: Cannot determine GL stream through caps */ /* init colorspace conversion if needed */ /*ok = gst_gl_display_init_upload (glimage_sink->display, format, width, height, width, height); if (!ok) { GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND, GST_GL_DISPLAY_ERR_MSG (glimage_sink->display), (NULL)); return FALSE; } */ gst_gl_display_set_client_reshape_callback (glimage_sink->display, glimage_sink->clientReshapeCallback); gst_gl_display_set_client_draw_callback (glimage_sink->display, glimage_sink->clientDrawCallback); gst_gl_display_set_client_data (glimage_sink->display, glimage_sink->client_data); fps_n = GST_VIDEO_INFO_FPS_N (&vinfo); fps_d = GST_VIDEO_INFO_FPS_D (&vinfo); par_n = GST_VIDEO_INFO_PAR_N (&vinfo); par_d = GST_VIDEO_INFO_PAR_D (&vinfo); /* get display's PAR */ if (glimage_sink->par) { display_par_n = gst_value_get_fraction_numerator (glimage_sink->par); display_par_d = gst_value_get_fraction_denominator (glimage_sink->par); } else { display_par_n = 1; display_par_d = 1; } ok = gst_video_calculate_display_ratio (&display_ratio_num, &display_ratio_den, width, height, par_n, par_d, display_par_n, display_par_d); if (!ok) return FALSE; if (height % display_ratio_den == 0) { GST_DEBUG ("keeping video height"); glimage_sink->window_width = (guint) gst_util_uint64_scale_int (height, display_ratio_num, display_ratio_den); glimage_sink->window_height = height; } else if (width % display_ratio_num == 0) { GST_DEBUG ("keeping video width"); glimage_sink->window_width = width; glimage_sink->window_height = (guint) gst_util_uint64_scale_int (width, display_ratio_den, display_ratio_num); } else { GST_DEBUG ("approximating while keeping video height"); glimage_sink->window_width = (guint) gst_util_uint64_scale_int (height, display_ratio_num, display_ratio_den); glimage_sink->window_height = height; } GST_DEBUG ("scaling to %dx%d", glimage_sink->window_width, glimage_sink->window_height); GST_VIDEO_SINK_WIDTH (glimage_sink) = width; GST_VIDEO_SINK_HEIGHT (glimage_sink) = height; glimage_sink->width = width; glimage_sink->height = height; glimage_sink->fps_n = fps_n; glimage_sink->fps_d = fps_d; glimage_sink->par_n = par_n; glimage_sink->par_d = par_d; if (!glimage_sink->window_id && !glimage_sink->new_window_id) gst_video_overlay_prepare_window_handle (GST_VIDEO_OVERLAY (glimage_sink)); return TRUE; } static GstFlowReturn gst_glimage_sink_render (GstBaseSink * bsink, GstBuffer * buf) { GstGLImageSink *glimage_sink; glimage_sink = GST_GLIMAGE_SINK (bsink); /* FIXME: implement using GstGLMeta */ //is gl /*if (glimage_sink->is_gl) { //increment gl buffer ref before storage gl_buffer = GST_GL_BUFFER (gst_buffer_ref (buf)); } //is not gl else { //blocking call gl_buffer = gst_gl_buffer_new (glimage_sink->display, glimage_sink->width, glimage_sink->height); //blocking call gst_gl_display_do_upload (glimage_sink->display, gl_buffer->texture, glimage_sink->width, glimage_sink->height, GST_BUFFER_DATA (buf)); //gl_buffer is created in this block, so the gl buffer is already referenced } */ if (glimage_sink->window_id != glimage_sink->new_window_id) { glimage_sink->window_id = glimage_sink->new_window_id; gst_gl_display_set_window_id (glimage_sink->display, glimage_sink->window_id); } //the buffer is cleared when an other comes in if (glimage_sink->stored_buffer) { gst_buffer_unref (glimage_sink->stored_buffer); } //store current buffer glimage_sink->stored_buffer = buf; /* //redisplay opengl scene if (gl_buffer->texture && gst_gl_display_redisplay (glimage_sink->display, gl_buffer->texture, gl_buffer->width, gl_buffer->height, glimage_sink->window_width, glimage_sink->window_height, glimage_sink->keep_aspect_ratio)) return GST_FLOW_OK; else { GST_ELEMENT_ERROR (glimage_sink, RESOURCE, NOT_FOUND, GST_GL_DISPLAY_ERR_MSG (glimage_sink->display), (NULL)); return GST_FLOW_ERROR; }*/ return GST_FLOW_OK; } static void gst_glimage_sink_video_overlay_init (GstVideoOverlayInterface * iface) { iface->set_window_handle = gst_glimage_sink_set_window_handle; iface->expose = gst_glimage_sink_expose; } static void gst_glimage_sink_set_window_handle (GstVideoOverlay * overlay, guintptr id) { GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (overlay); gulong window_id = (gulong) id; g_return_if_fail (GST_IS_GLIMAGE_SINK (overlay)); GST_DEBUG ("set_xwindow_id %ld", window_id); glimage_sink->new_window_id = window_id; } static void gst_glimage_sink_expose (GstVideoOverlay * overlay) { GstGLImageSink *glimage_sink = GST_GLIMAGE_SINK (overlay); //redisplay opengl scene if (glimage_sink->display && glimage_sink->window_id) { if (glimage_sink->window_id != glimage_sink->new_window_id) { glimage_sink->window_id = glimage_sink->new_window_id; gst_gl_display_set_window_id (glimage_sink->display, glimage_sink->window_id); } gst_gl_display_redisplay (glimage_sink->display, 0, 0, 0, 0, 0, glimage_sink->keep_aspect_ratio); } }