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514 lines
16 KiB
C
514 lines
16 KiB
C
/*
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* GStreamer
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* Copyright (C) 2016 Matthew Waters <matthew@centricular.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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/**
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* SECTION:element-glvideo_flip
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* @title: glvideo_flip
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*
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* Transforms video on the GPU.
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*
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* ## Examples
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* |[
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* gst-launch-1.0 videotestsrc ! glupload ! glvideoflip method=clockwise ! glimagesinkelement
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* ]| This pipeline flips the test image 90 degrees clockwise.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstglelements.h"
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#include "gstglvideoflip.h"
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#define GST_CAT_DEFAULT gst_gl_video_flip_debug
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GST_DEBUG_CATEGORY_STATIC (GST_CAT_DEFAULT);
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#define DEFAULT_METHOD GST_VIDEO_ORIENTATION_IDENTITY
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enum
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{
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PROP_0,
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PROP_METHOD,
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PROP_VIDEO_DIRECTION
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};
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static GstStaticPadTemplate _sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw(" GST_CAPS_FEATURE_MEMORY_GL_MEMORY "), "
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"format = (string) RGBA, "
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"width = " GST_VIDEO_SIZE_RANGE ", "
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"height = " GST_VIDEO_SIZE_RANGE ", "
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"framerate = " GST_VIDEO_FPS_RANGE ", "
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"texture-target = (string) 2D"));
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static GstStaticPadTemplate _src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw(" GST_CAPS_FEATURE_MEMORY_GL_MEMORY "), "
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"format = (string) RGBA, "
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"width = " GST_VIDEO_SIZE_RANGE ", "
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"height = " GST_VIDEO_SIZE_RANGE ", "
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"framerate = " GST_VIDEO_FPS_RANGE ", "
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"texture-target = (string) 2D"));
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#define GST_TYPE_GL_VIDEO_FLIP_METHOD (gst_video_flip_method_get_type())
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static const GEnumValue video_flip_methods[] = {
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{GST_VIDEO_ORIENTATION_IDENTITY, "Identity (no rotation)", "none"},
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{GST_VIDEO_ORIENTATION_90R, "Rotate clockwise 90 degrees", "clockwise"},
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{GST_VIDEO_ORIENTATION_180, "Rotate 180 degrees", "rotate-180"},
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{GST_VIDEO_ORIENTATION_90L, "Rotate counter-clockwise 90 degrees",
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"counterclockwise"},
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{GST_VIDEO_ORIENTATION_HORIZ, "Flip horizontally", "horizontal-flip"},
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{GST_VIDEO_ORIENTATION_VERT, "Flip vertically", "vertical-flip"},
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{GST_VIDEO_ORIENTATION_UL_LR,
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"Flip across upper left/lower right diagonal", "upper-left-diagonal"},
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{GST_VIDEO_ORIENTATION_UR_LL,
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"Flip across upper right/lower left diagonal", "upper-right-diagonal"},
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{GST_VIDEO_ORIENTATION_AUTO,
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"Select flip method based on image-orientation tag", "automatic"},
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{0, NULL, NULL},
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};
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static GType
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gst_video_flip_method_get_type (void)
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{
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static GType video_flip_method_type = 0;
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if (!video_flip_method_type) {
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video_flip_method_type = g_enum_register_static ("GstGLVideoFlipMethod",
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video_flip_methods);
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}
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return video_flip_method_type;
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}
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static void gst_gl_video_flip_finalize (GObject * object);
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static void gst_gl_video_flip_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_gl_video_flip_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstPadProbeReturn _input_sink_probe (GstPad * pad,
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GstPadProbeInfo * info, gpointer user_data);
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static GstPadProbeReturn _trans_src_probe (GstPad * pad, GstPadProbeInfo * info,
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gpointer user_data);
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static void
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gst_gl_video_flip_video_direction_interface_init (GstVideoDirectionInterface
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* iface);
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#define gst_gl_video_flip_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstGLVideoFlip, gst_gl_video_flip,
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GST_TYPE_BIN, GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT,
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"glvideoflip", 0, "glvideoflip element");
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G_IMPLEMENT_INTERFACE (GST_TYPE_VIDEO_DIRECTION,
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gst_gl_video_flip_video_direction_interface_init););
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (glvideoflip, "glvideoflip",
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GST_RANK_NONE, GST_TYPE_GL_VIDEO_FLIP, gl_element_init (plugin));
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static void
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gst_gl_video_flip_video_direction_interface_init (GstVideoDirectionInterface
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* iface)
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{
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/* We implement the video-direction property */
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}
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static void
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gst_gl_video_flip_class_init (GstGLVideoFlipClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *element_class;
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gobject_class = (GObjectClass *) klass;
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element_class = GST_ELEMENT_CLASS (klass);
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gobject_class->finalize = gst_gl_video_flip_finalize;
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gobject_class->set_property = gst_gl_video_flip_set_property;
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gobject_class->get_property = gst_gl_video_flip_get_property;
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g_object_class_install_property (gobject_class, PROP_METHOD,
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g_param_spec_enum ("method", "method",
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"method (deprecated, use video-direction instead)",
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GST_TYPE_GL_VIDEO_FLIP_METHOD, DEFAULT_METHOD,
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GST_PARAM_CONTROLLABLE | G_PARAM_READWRITE | G_PARAM_CONSTRUCT |
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G_PARAM_STATIC_STRINGS));
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g_object_class_override_property (gobject_class, PROP_VIDEO_DIRECTION,
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"video-direction");
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gst_element_class_add_static_pad_template (element_class, &_src_template);
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gst_element_class_add_static_pad_template (element_class, &_sink_template);
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gst_element_class_set_metadata (element_class, "OpenGL video flip filter",
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"Filter/Effect/Video", "Flip video on the GPU",
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"Matthew Waters <matthew@centricular.com>");
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gst_type_mark_as_plugin_api (GST_TYPE_GL_VIDEO_FLIP_METHOD, 0);
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}
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static void
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gst_gl_video_flip_init (GstGLVideoFlip * flip)
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{
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gboolean res = TRUE;
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GstPad *pad;
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flip->aspect = 1.0;
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flip->input_capsfilter = gst_element_factory_make ("capsfilter", NULL);
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res &= gst_bin_add (GST_BIN (flip), flip->input_capsfilter);
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flip->transformation = gst_element_factory_make ("gltransformation", NULL);
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g_object_set (flip->transformation, "ortho", TRUE, NULL);
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res &= gst_bin_add (GST_BIN (flip), flip->transformation);
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flip->output_capsfilter = gst_element_factory_make ("capsfilter", NULL);
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res &= gst_bin_add (GST_BIN (flip), flip->output_capsfilter);
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res &=
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gst_element_link_pads (flip->input_capsfilter, "src",
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flip->transformation, "sink");
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res &=
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gst_element_link_pads (flip->transformation, "src",
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flip->output_capsfilter, "sink");
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pad = gst_element_get_static_pad (flip->input_capsfilter, "sink");
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if (!pad) {
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res = FALSE;
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} else {
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GST_DEBUG_OBJECT (flip, "setting target sink pad %" GST_PTR_FORMAT, pad);
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flip->sinkpad = gst_ghost_pad_new ("sink", pad);
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flip->sink_probe = gst_pad_add_probe (flip->sinkpad,
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GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM |
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GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM,
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(GstPadProbeCallback) _input_sink_probe, flip, NULL);
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gst_element_add_pad (GST_ELEMENT_CAST (flip), flip->sinkpad);
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gst_object_unref (pad);
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}
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pad = gst_element_get_static_pad (flip->transformation, "src");
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flip->src_probe = gst_pad_add_probe (pad,
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GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM,
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(GstPadProbeCallback) _trans_src_probe, flip, NULL);
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gst_object_unref (pad);
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pad = gst_element_get_static_pad (flip->output_capsfilter, "src");
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if (!pad) {
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res = FALSE;
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} else {
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GST_DEBUG_OBJECT (flip, "setting target sink pad %" GST_PTR_FORMAT, pad);
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flip->srcpad = gst_ghost_pad_new ("src", pad);
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gst_element_add_pad (GST_ELEMENT_CAST (flip), flip->srcpad);
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gst_object_unref (pad);
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}
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if (!res) {
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GST_WARNING_OBJECT (flip, "Failed to add/connect the necessary machinery");
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}
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}
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static void
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gst_gl_video_flip_finalize (GObject * object)
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{
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GstGLVideoFlip *flip = GST_GL_VIDEO_FLIP (object);
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gst_caps_replace (&flip->input_caps, NULL);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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/* Caps negotiation happens like this:
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*
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* 1. caps/accept-caps queries bypass the capsfilters on either side of the
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* transformation element so the fixed caps don't get in the way.
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* 2. Receiving a caps event on the sink pad will set fixed caps on either side
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* of the transformation element.
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*/
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static GstCaps *
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_transform_caps (GstGLVideoFlip * vf, GstPadDirection direction, GstCaps * caps)
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{
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GstCaps *output = gst_caps_copy (caps);
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gint i;
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for (i = 0; i < gst_caps_get_size (output); i++) {
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GstStructure *structure = gst_caps_get_structure (output, i);
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gint width, height;
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gint par_n, par_d;
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if (gst_structure_get_int (structure, "width", &width) &&
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gst_structure_get_int (structure, "height", &height)) {
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switch (vf->active_method) {
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case GST_VIDEO_ORIENTATION_90R:
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case GST_VIDEO_ORIENTATION_90L:
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case GST_VIDEO_ORIENTATION_UL_LR:
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case GST_VIDEO_ORIENTATION_UR_LL:
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gst_structure_set (structure, "width", G_TYPE_INT, height,
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"height", G_TYPE_INT, width, NULL);
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if (gst_structure_get_fraction (structure, "pixel-aspect-ratio",
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&par_n, &par_d)) {
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if (par_n != 1 || par_d != 1) {
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GValue val = { 0, };
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g_value_init (&val, GST_TYPE_FRACTION);
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gst_value_set_fraction (&val, par_d, par_n);
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gst_structure_set_value (structure, "pixel-aspect-ratio", &val);
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g_value_unset (&val);
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}
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}
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break;
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case GST_VIDEO_ORIENTATION_IDENTITY:
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case GST_VIDEO_ORIENTATION_180:
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case GST_VIDEO_ORIENTATION_HORIZ:
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case GST_VIDEO_ORIENTATION_VERT:
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break;
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default:
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g_assert_not_reached ();
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break;
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}
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}
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}
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return output;
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}
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/* with object lock */
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static void
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_set_active_method (GstGLVideoFlip * vf, GstVideoOrientationMethod method,
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GstCaps * caps)
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{
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gfloat rot_z = 0., scale_x = 1.0, scale_y = 1.0;
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GstCaps *output_caps, *templ;
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GstPad *srcpad;
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switch (method) {
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case GST_VIDEO_ORIENTATION_IDENTITY:
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break;
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case GST_VIDEO_ORIENTATION_90R:
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scale_x *= vf->aspect;
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scale_y *= 1. / vf->aspect;
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rot_z = 90.;
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break;
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case GST_VIDEO_ORIENTATION_180:
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rot_z = 180.;
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break;
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case GST_VIDEO_ORIENTATION_90L:
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scale_x *= vf->aspect;
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scale_y *= 1. / vf->aspect;
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rot_z = 270.;
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break;
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case GST_VIDEO_ORIENTATION_HORIZ:
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scale_x *= -1.;
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break;
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case GST_VIDEO_ORIENTATION_UR_LL:
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scale_x *= -vf->aspect;
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scale_y *= 1. / vf->aspect;
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rot_z = 90.;
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break;
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case GST_VIDEO_ORIENTATION_VERT:
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scale_x *= -1.;
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rot_z = 180.;
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break;
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case GST_VIDEO_ORIENTATION_UL_LR:
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scale_x *= -vf->aspect;
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scale_y *= 1. / vf->aspect;
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rot_z = 270.;
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break;
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default:
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break;
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}
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vf->active_method = method;
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output_caps = _transform_caps (vf, GST_PAD_SINK, caps);
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gst_caps_replace (&vf->input_caps, caps);
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srcpad = gst_element_get_static_pad (vf->transformation, "src");
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templ = gst_pad_get_pad_template_caps (srcpad);
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gst_object_unref (srcpad);
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gst_caps_append (output_caps, gst_caps_ref (templ));
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GST_OBJECT_UNLOCK (vf);
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g_object_set (vf->input_capsfilter, "caps", caps, NULL);
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g_object_set (vf->output_capsfilter, "caps", output_caps, NULL);
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g_object_set (vf->transformation, "rotation-z", rot_z, "scale-x", scale_x,
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"scale-y", scale_y, NULL);
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gst_caps_unref (output_caps);
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GST_OBJECT_LOCK (vf);
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}
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static void
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gst_gl_video_flip_set_method (GstGLVideoFlip * vf,
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GstVideoOrientationMethod method, gboolean from_tag)
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{
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GST_OBJECT_LOCK (vf);
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if (method == GST_VIDEO_ORIENTATION_CUSTOM) {
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GST_WARNING_OBJECT (vf, "unsupported custom orientation");
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GST_OBJECT_UNLOCK (vf);
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return;
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}
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/* Store updated method */
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if (from_tag)
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vf->tag_method = method;
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else
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vf->method = method;
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/* Get the new method */
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if (vf->method == GST_VIDEO_ORIENTATION_AUTO)
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method = vf->tag_method;
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else
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method = vf->method;
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if (vf->input_caps)
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_set_active_method (vf, method, vf->input_caps);
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else {
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/* just store the configured method here. The actual transform configuration
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* will be done once caps are configured. See caps handling in
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* _input_sink_probe. */
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vf->active_method = method;
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}
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GST_OBJECT_UNLOCK (vf);
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}
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static void
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gst_gl_video_flip_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstGLVideoFlip *vf = GST_GL_VIDEO_FLIP (object);
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switch (prop_id) {
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case PROP_METHOD:
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case PROP_VIDEO_DIRECTION:
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gst_gl_video_flip_set_method (vf, g_value_get_enum (value), FALSE);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static void
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gst_gl_video_flip_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstGLVideoFlip *vf = GST_GL_VIDEO_FLIP (object);
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switch (prop_id) {
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case PROP_METHOD:
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case PROP_VIDEO_DIRECTION:
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g_value_set_enum (value, vf->method);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstPadProbeReturn
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_input_sink_probe (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
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{
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GstGLVideoFlip *vf = GST_GL_VIDEO_FLIP (user_data);
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if (GST_PAD_PROBE_INFO_TYPE (info) & GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM) {
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GstEvent *event = GST_PAD_PROBE_INFO_EVENT (info);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_TAG:{
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GstTagList *taglist;
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GstVideoOrientationMethod method;
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gst_event_parse_tag (event, &taglist);
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if (gst_video_orientation_from_tag (taglist, &method))
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gst_gl_video_flip_set_method (vf, method, TRUE);
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break;
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}
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case GST_EVENT_CAPS:{
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GstCaps *caps;
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GstVideoInfo v_info;
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gst_event_parse_caps (event, &caps);
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GST_OBJECT_LOCK (vf);
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if (gst_video_info_from_caps (&v_info, caps))
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vf->aspect =
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(gfloat) GST_VIDEO_INFO_WIDTH (&v_info) /
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(gfloat) GST_VIDEO_INFO_HEIGHT (&v_info);
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else
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vf->aspect = 1.0;
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_set_active_method (vf, vf->active_method, caps);
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GST_OBJECT_UNLOCK (vf);
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break;
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}
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default:
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break;
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}
|
|
} else if (GST_PAD_PROBE_INFO_TYPE (info) &
|
|
GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM) {
|
|
GstQuery *query = GST_PAD_PROBE_INFO_QUERY (info);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
/* bypass the capsfilter */
|
|
case GST_QUERY_CAPS:
|
|
case GST_QUERY_ACCEPT_CAPS:{
|
|
GstPad *pad = gst_element_get_static_pad (vf->transformation, "sink");
|
|
if (gst_pad_query (pad, query)) {
|
|
gst_object_unref (pad);
|
|
return GST_PAD_PROBE_HANDLED;
|
|
} else {
|
|
gst_object_unref (pad);
|
|
return GST_PAD_PROBE_DROP;
|
|
}
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return GST_PAD_PROBE_OK;
|
|
}
|
|
|
|
static GstPadProbeReturn
|
|
_trans_src_probe (GstPad * pad, GstPadProbeInfo * info, gpointer user_data)
|
|
{
|
|
GstGLVideoFlip *vf = GST_GL_VIDEO_FLIP (user_data);
|
|
|
|
if (GST_PAD_PROBE_INFO_TYPE (info) & GST_PAD_PROBE_TYPE_QUERY_DOWNSTREAM) {
|
|
GstQuery *query = GST_PAD_PROBE_INFO_QUERY (info);
|
|
|
|
switch (GST_QUERY_TYPE (query)) {
|
|
/* bypass the capsfilter */
|
|
case GST_QUERY_CAPS:
|
|
case GST_QUERY_ACCEPT_CAPS:{
|
|
if (gst_pad_peer_query (vf->srcpad, query))
|
|
return GST_PAD_PROBE_HANDLED;
|
|
else
|
|
return GST_PAD_PROBE_DROP;
|
|
}
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return GST_PAD_PROBE_OK;
|
|
}
|