mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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378 lines
10 KiB
C
378 lines
10 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) <2003> David Schleef <ds@schleef.org>
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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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 "gstnavigationtest.h"
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#include <string.h>
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#include <math.h>
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#include <gst/video/video.h>
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#ifdef _MSC_VER
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#define rint(x) (floor((x)+0.5))
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#endif
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GST_DEBUG_CATEGORY_STATIC (navigationtest_debug);
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#define GST_CAT_DEFAULT navigationtest_debug
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static GstStaticPadTemplate gst_navigationtest_src_template =
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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 (GST_VIDEO_CAPS_MAKE ("I420"))
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);
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static GstStaticPadTemplate gst_navigationtest_sink_template =
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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 (GST_VIDEO_CAPS_MAKE ("I420"))
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);
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static GstVideoFilterClass *parent_class = NULL;
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static gboolean
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gst_navigationtest_handle_src_event (GstPad * pad, GstEvent * event)
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{
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GstNavigationtest *navtest;
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const gchar *type;
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navtest = GST_NAVIGATIONTEST (GST_PAD_PARENT (pad));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_NAVIGATION:
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{
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const GstStructure *s = gst_event_get_structure (event);
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gint fps_n, fps_d;
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fps_n = GST_VIDEO_INFO_FPS_N (&navtest->info);
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fps_d = GST_VIDEO_INFO_FPS_D (&navtest->info);
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type = gst_structure_get_string (s, "event");
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if (g_str_equal (type, "mouse-move")) {
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gst_structure_get_double (s, "pointer_x", &navtest->x);
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gst_structure_get_double (s, "pointer_y", &navtest->y);
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} else if (g_str_equal (type, "mouse-button-press")) {
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ButtonClick *click = g_new (ButtonClick, 1);
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gst_structure_get_double (s, "pointer_x", &click->x);
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gst_structure_get_double (s, "pointer_y", &click->y);
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click->images_left = (fps_n + fps_d - 1) / fps_d;
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/* green */
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click->cy = 150;
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click->cu = 46;
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click->cv = 21;
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navtest->clicks = g_slist_prepend (navtest->clicks, click);
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} else if (g_str_equal (type, "mouse-button-release")) {
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ButtonClick *click = g_new (ButtonClick, 1);
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gst_structure_get_double (s, "pointer_x", &click->x);
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gst_structure_get_double (s, "pointer_y", &click->y);
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click->images_left = (fps_n + fps_d - 1) / fps_d;
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/* red */
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click->cy = 76;
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click->cu = 85;
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click->cv = 255;
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navtest->clicks = g_slist_prepend (navtest->clicks, click);
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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 gst_pad_event_default (pad, event);
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}
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/* Useful macros */
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#define GST_VIDEO_I420_Y_ROWSTRIDE(width) (GST_ROUND_UP_4(width))
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#define GST_VIDEO_I420_U_ROWSTRIDE(width) (GST_ROUND_UP_8(width)/2)
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#define GST_VIDEO_I420_V_ROWSTRIDE(width) ((GST_ROUND_UP_8(GST_VIDEO_I420_Y_ROWSTRIDE(width)))/2)
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#define GST_VIDEO_I420_Y_OFFSET(w,h) (0)
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#define GST_VIDEO_I420_U_OFFSET(w,h) (GST_VIDEO_I420_Y_OFFSET(w,h)+(GST_VIDEO_I420_Y_ROWSTRIDE(w)*GST_ROUND_UP_2(h)))
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#define GST_VIDEO_I420_V_OFFSET(w,h) (GST_VIDEO_I420_U_OFFSET(w,h)+(GST_VIDEO_I420_U_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
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#define GST_VIDEO_I420_SIZE(w,h) (GST_VIDEO_I420_V_OFFSET(w,h)+(GST_VIDEO_I420_V_ROWSTRIDE(w)*GST_ROUND_UP_2(h)/2))
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static gboolean
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gst_navigationtest_get_unit_size (GstBaseTransform * btrans, GstCaps * caps,
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gsize * size)
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{
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GstNavigationtest *navtest;
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GstStructure *structure;
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gboolean ret = FALSE;
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gint width, height;
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navtest = GST_NAVIGATIONTEST (btrans);
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structure = gst_caps_get_structure (caps, 0);
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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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*size = GST_VIDEO_I420_SIZE (width, height);
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ret = TRUE;
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GST_DEBUG_OBJECT (navtest, "our frame size is %d bytes (%dx%d)", *size,
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width, height);
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}
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return ret;
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}
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static gboolean
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gst_navigationtest_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
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GstCaps * outcaps)
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{
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GstNavigationtest *navtest = GST_NAVIGATIONTEST (btrans);
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GstVideoInfo info;
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if (!gst_video_info_from_caps (&info, incaps))
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goto invalid_caps;
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navtest->info = info;
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return TRUE;
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/* ERRORS */
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invalid_caps:
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{
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GST_ERROR_OBJECT (navtest, "invalid caps");
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return FALSE;
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}
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}
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static void
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draw_box_planar411 (GstVideoFrame * frame, int x, int y,
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guint8 colory, guint8 coloru, guint8 colorv)
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{
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gint width, height;
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int x1, x2, y1, y2;
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guint8 *d;
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gint stride;
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width = GST_VIDEO_FRAME_WIDTH (frame);
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height = GST_VIDEO_FRAME_HEIGHT (frame);
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if (x < 0 || y < 0 || x >= width || y >= height)
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return;
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x1 = MAX (x - 5, 0);
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x2 = MIN (x + 5, width);
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y1 = MAX (y - 5, 0);
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y2 = MIN (y + 5, height);
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d = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
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stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
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for (y = y1; y < y2; y++) {
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for (x = x1; x < x2; x++) {
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d[y * stride + x] = colory;
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}
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}
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d = GST_VIDEO_FRAME_PLANE_DATA (frame, 1);
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stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 1);
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x1 /= 2;
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x2 /= 2;
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y1 /= 2;
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y2 /= 2;
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for (y = y1; y < y2; y++) {
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for (x = x1; x < x2; x++) {
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d[y * stride + x] = coloru;
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}
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}
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d = GST_VIDEO_FRAME_PLANE_DATA (frame, 2);
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stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 2);
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for (y = y1; y < y2; y++) {
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for (x = x1; x < x2; x++) {
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d[y * stride + x] = colorv;
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}
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}
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}
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static GstFlowReturn
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gst_navigationtest_transform (GstBaseTransform * trans, GstBuffer * in,
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GstBuffer * out)
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{
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GstNavigationtest *navtest = GST_NAVIGATIONTEST (trans);
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GSList *walk;
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GstVideoFrame in_frame, out_frame;
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if (!gst_video_frame_map (&in_frame, &navtest->info, in, GST_MAP_READ))
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goto invalid_in;
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if (!gst_video_frame_map (&out_frame, &navtest->info, out, GST_MAP_WRITE))
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goto invalid_out;
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gst_video_frame_copy (&out_frame, &in_frame);
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walk = navtest->clicks;
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while (walk) {
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ButtonClick *click = walk->data;
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walk = g_slist_next (walk);
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draw_box_planar411 (&out_frame,
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rint (click->x), rint (click->y), click->cy, click->cu, click->cv);
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if (--click->images_left < 1) {
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navtest->clicks = g_slist_remove (navtest->clicks, click);
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g_free (click);
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}
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}
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draw_box_planar411 (&out_frame,
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rint (navtest->x), rint (navtest->y), 0, 128, 128);
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gst_video_frame_unmap (&out_frame);
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gst_video_frame_unmap (&in_frame);
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return GST_FLOW_OK;
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/* ERRORS */
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invalid_in:
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{
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GST_ERROR_OBJECT (navtest, "received invalid input buffer");
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return GST_FLOW_OK;
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}
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invalid_out:
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{
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GST_ERROR_OBJECT (navtest, "received invalid output buffer");
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gst_video_frame_unmap (&in_frame);
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return GST_FLOW_OK;
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}
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}
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static GstStateChangeReturn
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gst_navigationtest_change_state (GstElement * element,
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GstStateChange transition)
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{
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GstStateChangeReturn ret = GST_STATE_CHANGE_SUCCESS;
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GstNavigationtest *navtest = GST_NAVIGATIONTEST (element);
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if (GST_ELEMENT_CLASS (parent_class)->change_state)
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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/* downwards state changes */
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switch (transition) {
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case GST_STATE_CHANGE_PAUSED_TO_READY:
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{
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g_slist_foreach (navtest->clicks, (GFunc) g_free, NULL);
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g_slist_free (navtest->clicks);
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navtest->clicks = NULL;
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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 ret;
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}
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static void
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gst_navigationtest_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_set_details_simple (element_class, "Video navigation test",
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"Filter/Effect/Video",
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"Handle navigation events showing a black square following mouse pointer",
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"David Schleef <ds@schleef.org>");
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_navigationtest_sink_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_navigationtest_src_template));
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}
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static void
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gst_navigationtest_class_init (gpointer klass, gpointer class_data)
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{
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GstElementClass *element_class;
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GstBaseTransformClass *trans_class;
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element_class = (GstElementClass *) klass;
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trans_class = (GstBaseTransformClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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element_class->change_state =
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GST_DEBUG_FUNCPTR (gst_navigationtest_change_state);
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trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_navigationtest_set_caps);
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trans_class->get_unit_size =
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GST_DEBUG_FUNCPTR (gst_navigationtest_get_unit_size);
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trans_class->transform = GST_DEBUG_FUNCPTR (gst_navigationtest_transform);
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}
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static void
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gst_navigationtest_init (GTypeInstance * instance, gpointer g_class)
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{
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GstNavigationtest *navtest = GST_NAVIGATIONTEST (instance);
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GstBaseTransform *btrans = GST_BASE_TRANSFORM (instance);
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gst_pad_set_event_function (btrans->srcpad,
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GST_DEBUG_FUNCPTR (gst_navigationtest_handle_src_event));
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navtest->x = -1;
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navtest->y = -1;
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}
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GType
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gst_navigationtest_get_type (void)
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{
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static GType navigationtest_type = 0;
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if (!navigationtest_type) {
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static const GTypeInfo navigationtest_info = {
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sizeof (GstNavigationtestClass),
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gst_navigationtest_base_init,
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NULL,
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gst_navigationtest_class_init,
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NULL,
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NULL,
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sizeof (GstNavigationtest),
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0,
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gst_navigationtest_init,
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};
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navigationtest_type = g_type_register_static (GST_TYPE_VIDEO_FILTER,
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"GstNavigationtest", &navigationtest_info, 0);
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}
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return navigationtest_type;
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}
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static gboolean
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plugin_init (GstPlugin * plugin)
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{
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GST_DEBUG_CATEGORY_INIT (navigationtest_debug, "navigationtest", 0,
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"navigationtest");
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return gst_element_register (plugin, "navigationtest", GST_RANK_NONE,
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GST_TYPE_NAVIGATIONTEST);
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"navigationtest",
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"Template for a video filter",
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plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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