From: Antonio Ospite Date: Sat, 2 Nov 2013 11:27:59 +0000 (+0100) Subject: Rename gst-matrix-example to gst-perspective-example X-Git-Url: https://git.ao2.it/experiments/gstreamer.git/commitdiff_plain/6dafa0dbe81010f758224579b1357d6e59aa0bd7?ds=sidebyside Rename gst-matrix-example to gst-perspective-example --- diff --git a/c/gst-matrix-example/Makefile b/c/gst-matrix-example/Makefile deleted file mode 100644 index a91cbb3..0000000 --- a/c/gst-matrix-example/Makefile +++ /dev/null @@ -1,39 +0,0 @@ -CFLAGS = -std=c99 -pedantic -pedantic-errors -Wall -g3 -O2 -D_ANSI_SOURCE_ -CFLAGS += -fno-common \ - -Wall \ - -Wdeclaration-after-statement \ - -Wextra \ - -Wformat=2 \ - -Winit-self \ - -Winline \ - -Wpacked \ - -Wp,-D_FORTIFY_SOURCE=2 \ - -Wpointer-arith \ - -Wlarger-than-65500 \ - -Wmissing-declarations \ - -Wmissing-format-attribute \ - -Wmissing-noreturn \ - -Wmissing-prototypes \ - -Wnested-externs \ - -Wold-style-definition \ - -Wredundant-decls \ - -Wsign-compare \ - -Wstrict-aliasing=2 \ - -Wstrict-prototypes \ - -Wundef \ - -Wunreachable-code \ - -Wunsafe-loop-optimizations \ - -Wunused-but-set-variable \ - -Wwrite-strings - -CFLAGS += $(shell pkg-config --cflags gstreamer-1.0) -LDLIBS += $(shell pkg-config --libs gstreamer-1.0) - -gst-matrix-example: gst-matrix-example.o - -clean: - rm -f *~ *.o gst-matrix-example - -test: gst-matrix-example - G_DEBUG=gc-friendly G_SLICE=always-malloc \ - valgrind --leak-check=full --show-reachable=yes ./gst-matrix-example diff --git a/c/gst-matrix-example/README.txt b/c/gst-matrix-example/README.txt deleted file mode 100644 index 8ba9d1b..0000000 --- a/c/gst-matrix-example/README.txt +++ /dev/null @@ -1,3 +0,0 @@ -If you need to use a custom version of gst-plugins-bad, use something like: - -GST_PLUGIN_PATH=${SOMEPATH}/gst-plugins-bad/gst/geometrictransform/ ./gst-matrix-example diff --git a/c/gst-matrix-example/gst-matrix-example.c b/c/gst-matrix-example/gst-matrix-example.c deleted file mode 100644 index 2996c47..0000000 --- a/c/gst-matrix-example/gst-matrix-example.c +++ /dev/null @@ -1,138 +0,0 @@ -/* gstmatrix-example - test program for the GStreamer matrix element - * - * Copyright (C) 2013 Antonio Ospite - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 2 of the License, or - * (at your option) any later version. - * - * This program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see . - */ - -/* FIXME: suppress warnings for deprecated API such as GValueArray - * with newer GLib versions (>= 2.31.0) - * - * It is just not possible to switch to GArray yet because the python API in - * 1.2.0 still passes iterable properties as GValueArray */ -#define GLIB_DISABLE_DEPRECATION_WARNINGS -#include - -static gboolean on_message(GstBus *bus, GstMessage *message, gpointer user_data) -{ - GMainLoop *loop = (GMainLoop *)user_data; - - switch (GST_MESSAGE_TYPE(message)) { - case GST_MESSAGE_ERROR: - g_error("Got ERROR"); - g_main_loop_quit(loop); - break; - case GST_MESSAGE_WARNING: - g_warning("Got WARNING"); - g_main_loop_quit(loop); - break; - case GST_MESSAGE_EOS: - g_main_loop_quit(loop); - break; - default: - break; - } - - return TRUE; -} - -static void set_matrix(GstElement *element) -{ - GValueArray *va; - GValue v = { 0, }; - gdouble m[9]; - guint i; - - /* Initialize a 2D perspective matrix, you can use - * cvGetPerspectiveTransform() from OpenCV to build it - * from a quad-to-quad transformation */ - m[0] = 1.9999999999999982; - m[1] = 0.8333333333333287; - m[2] = -399.99999999999926; - m[3] = 3.9968028886505525e-15; - m[4] = 1.9999999999999978; - m[5] = -8.277822871605139e-13; - m[6] = 2.428612866367518e-18; - m[7] = 0.0020833333333333294; - m[8] = 0.9999999999999996; - - va = g_value_array_new(1); - - g_value_init(&v, G_TYPE_DOUBLE); - for (i = 0; i < 9; i++) { - g_value_set_double(&v, m[i]); - g_value_array_append(va, &v); - g_value_reset(&v); - } - g_object_set(G_OBJECT(element), "m", va, NULL); - g_value_array_free(va); -} - -int main(void) -{ - GstElement *pipeline, *src, *capsfilter, *matrix, *conv, *sink; - GstCaps *caps; - GstBus *bus; - GMainLoop *loop; - int ret; - - gst_init(NULL, NULL); - - pipeline = gst_element_factory_make("pipeline", NULL); - - src = gst_element_factory_make("videotestsrc", NULL); - - caps = gst_caps_from_string("video/x-raw,format=AYUV,width=800,height=480"); - - capsfilter = gst_element_factory_make("capsfilter", NULL); - g_object_set(G_OBJECT(capsfilter), "caps", caps, NULL); - - matrix = gst_element_factory_make("matrix", NULL); - set_matrix(matrix); - - conv = gst_element_factory_make("videoconvert", NULL); - - sink = gst_element_factory_make("autovideosink", NULL); - g_return_val_if_fail(sink != NULL, -1); - - gst_bin_add_many(GST_BIN(pipeline), src, capsfilter, matrix, conv, sink, NULL); - ret = gst_element_link_many(src, capsfilter, matrix, conv, sink, NULL); - if (!ret) { - g_error("Failed to link elements"); - return -2; - } - - loop = g_main_loop_new(NULL, FALSE); - - bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline)); - gst_bus_add_signal_watch(bus); - g_signal_connect(G_OBJECT(bus), "message", G_CALLBACK(on_message), - loop); - gst_object_unref(GST_OBJECT(bus)); - - ret = gst_element_set_state(pipeline, GST_STATE_PLAYING); - if (ret == GST_STATE_CHANGE_FAILURE) { - g_error("Failed to go into PLAYING state"); - return -3; - } - - g_main_loop_run(loop); - - gst_element_set_state(pipeline, GST_STATE_NULL); - - g_main_loop_unref(loop); - gst_object_unref(pipeline); - - return 0; -} diff --git a/c/gst-perspective-example/Makefile b/c/gst-perspective-example/Makefile new file mode 100644 index 0000000..9a28899 --- /dev/null +++ b/c/gst-perspective-example/Makefile @@ -0,0 +1,39 @@ +CFLAGS = -std=c99 -pedantic -pedantic-errors -Wall -g3 -O2 -D_ANSI_SOURCE_ +CFLAGS += -fno-common \ + -Wall \ + -Wdeclaration-after-statement \ + -Wextra \ + -Wformat=2 \ + -Winit-self \ + -Winline \ + -Wpacked \ + -Wp,-D_FORTIFY_SOURCE=2 \ + -Wpointer-arith \ + -Wlarger-than-65500 \ + -Wmissing-declarations \ + -Wmissing-format-attribute \ + -Wmissing-noreturn \ + -Wmissing-prototypes \ + -Wnested-externs \ + -Wold-style-definition \ + -Wredundant-decls \ + -Wsign-compare \ + -Wstrict-aliasing=2 \ + -Wstrict-prototypes \ + -Wundef \ + -Wunreachable-code \ + -Wunsafe-loop-optimizations \ + -Wunused-but-set-variable \ + -Wwrite-strings + +CFLAGS += $(shell pkg-config --cflags gstreamer-1.0) +LDLIBS += $(shell pkg-config --libs gstreamer-1.0) + +gst-perspective-example: gst-perspective-example.o + +clean: + rm -f *~ *.o gst-perspective-example + +test: gst-perspective-example + G_DEBUG=gc-friendly G_SLICE=always-malloc \ + valgrind --leak-check=full --show-reachable=yes ./gst-perspective-example diff --git a/c/gst-perspective-example/README.txt b/c/gst-perspective-example/README.txt new file mode 100644 index 0000000..ce3b0c7 --- /dev/null +++ b/c/gst-perspective-example/README.txt @@ -0,0 +1,3 @@ +If you need to use a custom version of gst-plugins-bad, use something like: + +GST_PLUGIN_PATH=${SOMEPATH}/gst-plugins-bad/gst/geometrictransform/ ./gst-perspective-example diff --git a/c/gst-perspective-example/gst-perspective-example.c b/c/gst-perspective-example/gst-perspective-example.c new file mode 100644 index 0000000..5360fd2 --- /dev/null +++ b/c/gst-perspective-example/gst-perspective-example.c @@ -0,0 +1,138 @@ +/* gst-perspective-example - test program for the GStreamer perspective element + * + * Copyright (C) 2013 Antonio Ospite + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + */ + +/* FIXME: suppress warnings for deprecated API such as GValueArray + * with newer GLib versions (>= 2.31.0) + * + * It is just not possible to switch to GArray yet because the python API in + * 1.2.0 still passes iterable properties as GValueArray */ +#define GLIB_DISABLE_DEPRECATION_WARNINGS +#include + +static gboolean on_message(GstBus *bus, GstMessage *message, gpointer user_data) +{ + GMainLoop *loop = (GMainLoop *)user_data; + + switch (GST_MESSAGE_TYPE(message)) { + case GST_MESSAGE_ERROR: + g_error("Got ERROR"); + g_main_loop_quit(loop); + break; + case GST_MESSAGE_WARNING: + g_warning("Got WARNING"); + g_main_loop_quit(loop); + break; + case GST_MESSAGE_EOS: + g_main_loop_quit(loop); + break; + default: + break; + } + + return TRUE; +} + +static void set_matrix(GstElement *element) +{ + GValueArray *va; + GValue v = { 0, }; + gdouble m[9]; + guint i; + + /* Initialize a 2D perspective matrix, you can use + * cvGetPerspectiveTransform() from OpenCV to build it + * from a quad-to-quad transformation */ + m[0] = 1.9999999999999982; + m[1] = 0.8333333333333287; + m[2] = -399.99999999999926; + m[3] = 3.9968028886505525e-15; + m[4] = 1.9999999999999978; + m[5] = -8.277822871605139e-13; + m[6] = 2.428612866367518e-18; + m[7] = 0.0020833333333333294; + m[8] = 0.9999999999999996; + + va = g_value_array_new(1); + + g_value_init(&v, G_TYPE_DOUBLE); + for (i = 0; i < 9; i++) { + g_value_set_double(&v, m[i]); + g_value_array_append(va, &v); + g_value_reset(&v); + } + g_object_set(G_OBJECT(element), "matrix", va, NULL); + g_value_array_free(va); +} + +int main(void) +{ + GstElement *pipeline, *src, *capsfilter, *perspective, *conv, *sink; + GstCaps *caps; + GstBus *bus; + GMainLoop *loop; + int ret; + + gst_init(NULL, NULL); + + pipeline = gst_element_factory_make("pipeline", NULL); + + src = gst_element_factory_make("videotestsrc", NULL); + + caps = gst_caps_from_string("video/x-raw,format=AYUV,width=800,height=480"); + + capsfilter = gst_element_factory_make("capsfilter", NULL); + g_object_set(G_OBJECT(capsfilter), "caps", caps, NULL); + + perspective = gst_element_factory_make("perspective", NULL); + set_matrix(perspective); + + conv = gst_element_factory_make("videoconvert", NULL); + + sink = gst_element_factory_make("autovideosink", NULL); + g_return_val_if_fail(sink != NULL, -1); + + gst_bin_add_many(GST_BIN(pipeline), src, capsfilter, perspective, conv, sink, NULL); + ret = gst_element_link_many(src, capsfilter, perspective, conv, sink, NULL); + if (!ret) { + g_error("Failed to link elements"); + return -2; + } + + loop = g_main_loop_new(NULL, FALSE); + + bus = gst_pipeline_get_bus(GST_PIPELINE(pipeline)); + gst_bus_add_signal_watch(bus); + g_signal_connect(G_OBJECT(bus), "message", G_CALLBACK(on_message), + loop); + gst_object_unref(GST_OBJECT(bus)); + + ret = gst_element_set_state(pipeline, GST_STATE_PLAYING); + if (ret == GST_STATE_CHANGE_FAILURE) { + g_error("Failed to go into PLAYING state"); + return -3; + } + + g_main_loop_run(loop); + + gst_element_set_state(pipeline, GST_STATE_NULL); + + g_main_loop_unref(loop); + gst_object_unref(pipeline); + + return 0; +}