diff options
Diffstat (limited to 'tests/examples/level')
-rw-r--r-- | tests/examples/level/Makefile.am | 4 | ||||
-rwxr-xr-x | tests/examples/level/Makefile.in | 834 | ||||
-rw-r--r-- | tests/examples/level/level-example.c | 140 |
3 files changed, 978 insertions, 0 deletions
diff --git a/tests/examples/level/Makefile.am b/tests/examples/level/Makefile.am new file mode 100644 index 0000000..67ca719 --- /dev/null +++ b/tests/examples/level/Makefile.am @@ -0,0 +1,4 @@ +noinst_PROGRAMS = level-example +level_example_CFLAGS = $(GST_CFLAGS) +level_example_LDADD = $(GST_LIBS) $(LIBM) + diff --git a/tests/examples/level/Makefile.in b/tests/examples/level/Makefile.in new file mode 100755 index 0000000..c6b6def --- /dev/null +++ b/tests/examples/level/Makefile.in @@ -0,0 +1,834 @@ +# Makefile.in generated by automake 1.14.1 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2013 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; without +# even the implied warranty of MERCHANTABILITY or FITNESS FOR A +# PARTICULAR PURPOSE. + +@SET_MAKE@ + +VPATH = @srcdir@ +am__is_gnu_make = test -n '$(MAKEFILE_LIST)' && test -n '$(MAKELEVEL)' +am__make_running_with_option = \ + case $${target_option-} in \ + ?) ;; 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maintainer-clean \ + maintainer-clean-generic mostlyclean mostlyclean-compile \ + mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \ + tags tags-am uninstall uninstall-am + + +# Tell versions [3.59,3.63) of GNU make to not export all variables. +# Otherwise a system limit (for SysV at least) may be exceeded. +.NOEXPORT: diff --git a/tests/examples/level/level-example.c b/tests/examples/level/level-example.c new file mode 100644 index 0000000..a953176 --- /dev/null +++ b/tests/examples/level/level-example.c @@ -0,0 +1,140 @@ +/* GStreamer + * Copyright (C) 2000,2001,2002,2003,2005 + * Thomas Vander Stichele <thomas at apestaart dot org> + * + * 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., 51 Franklin St, Fifth Floor, + * Boston, MA 02110-1301, USA. + */ + +#include <string.h> +#include <math.h> + +#define GLIB_DISABLE_DEPRECATION_WARNINGS + +#include <gst/gst.h> + +static gboolean +message_handler (GstBus * bus, GstMessage * message, gpointer data) +{ + + if (message->type == GST_MESSAGE_ELEMENT) { + const GstStructure *s = gst_message_get_structure (message); + const gchar *name = gst_structure_get_name (s); + + if (strcmp (name, "level") == 0) { + gint channels; + GstClockTime endtime; + gdouble rms_dB, peak_dB, decay_dB; + gdouble rms; + const GValue *array_val; + const GValue *value; + GValueArray *rms_arr, *peak_arr, *decay_arr; + gint i; + + if (!gst_structure_get_clock_time (s, "endtime", &endtime)) + g_warning ("Could not parse endtime"); + + /* the values are packed into GValueArrays with the value per channel */ + array_val = gst_structure_get_value (s, "rms"); + rms_arr = (GValueArray *) g_value_get_boxed (array_val); + + array_val = gst_structure_get_value (s, "peak"); + peak_arr = (GValueArray *) g_value_get_boxed (array_val); + + array_val = gst_structure_get_value (s, "decay"); + decay_arr = (GValueArray *) g_value_get_boxed (array_val); + + /* we can get the number of channels as the length of any of the value + * arrays */ + channels = rms_arr->n_values; + g_print ("endtime: %" GST_TIME_FORMAT ", channels: %d\n", + GST_TIME_ARGS (endtime), channels); + for (i = 0; i < channels; ++i) { + + g_print ("channel %d\n", i); + value = g_value_array_get_nth (rms_arr, i); + rms_dB = g_value_get_double (value); + + value = g_value_array_get_nth (peak_arr, i); + peak_dB = g_value_get_double (value); + + value = g_value_array_get_nth (decay_arr, i); + decay_dB = g_value_get_double (value); + g_print (" RMS: %f dB, peak: %f dB, decay: %f dB\n", + rms_dB, peak_dB, decay_dB); + + /* converting from dB to normal gives us a value between 0.0 and 1.0 */ + rms = pow (10, rms_dB / 20); + g_print (" normalized rms value: %f\n", rms); + } + } + } + /* we handled the message we want, and ignored the ones we didn't want. + * so the core can unref the message for us */ + return TRUE; +} + +int +main (int argc, char *argv[]) +{ + GstElement *audiotestsrc, *audioconvert, *level, *fakesink; + GstElement *pipeline; + GstCaps *caps; + GstBus *bus; + guint watch_id; + GMainLoop *loop; + + gst_init (&argc, &argv); + + caps = gst_caps_from_string ("audio/x-raw,channels=2"); + + pipeline = gst_pipeline_new (NULL); + g_assert (pipeline); + audiotestsrc = gst_element_factory_make ("audiotestsrc", NULL); + g_assert (audiotestsrc); + audioconvert = gst_element_factory_make ("audioconvert", NULL); + g_assert (audioconvert); + level = gst_element_factory_make ("level", NULL); + g_assert (level); + fakesink = gst_element_factory_make ("fakesink", NULL); + g_assert (fakesink); + + gst_bin_add_many (GST_BIN (pipeline), audiotestsrc, audioconvert, level, + fakesink, NULL); + if (!gst_element_link (audiotestsrc, audioconvert)) + g_error ("Failed to link audiotestsrc and audioconvert"); + if (!gst_element_link_filtered (audioconvert, level, caps)) + g_error ("Failed to link audioconvert and level"); + if (!gst_element_link (level, fakesink)) + g_error ("Failed to link level and fakesink"); + + /* make sure we'll get messages */ + g_object_set (G_OBJECT (level), "post-messages", TRUE, NULL); + /* run synced and not as fast as we can */ + g_object_set (G_OBJECT (fakesink), "sync", TRUE, NULL); + + bus = gst_element_get_bus (pipeline); + watch_id = gst_bus_add_watch (bus, message_handler, NULL); + + gst_element_set_state (pipeline, GST_STATE_PLAYING); + + /* we need to run a GLib main loop to get the messages */ + loop = g_main_loop_new (NULL, FALSE); + g_main_loop_run (loop); + + g_source_remove (watch_id); + g_main_loop_unref (loop); + return 0; +} |