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3b0437e58d
webrtc one should probably go into gst-examples. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/667>
117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/*
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* Copyright (c) 2015, Igalia S.L
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* Author: Philippe Normand <philn@igalia.com>
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* Licence: LGPL. (See COPYING.LGPL)
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*/
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#include <glib.h>
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#include <gst/gst.h>
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#include <gst/video/colorbalance.h>
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#define CONTROL_SATURATION 1
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#define CONTROL_BRIGHTNESS 1
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#define CONTROL_CONTRAST 1
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#define PIPELINE "rpicamsrc name=src preview=0 fullscreen=0 ! h264parse ! omxh264dec ! glimagesink sync=0"
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#define declare_value(name, value) \
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static gint current_##name = value; \
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static gboolean incrementing_##name = TRUE;
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#if CONTROL_SATURATION
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declare_value (SATURATION, 50);
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#endif
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#if CONTROL_BRIGHTNESS
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declare_value (BRIGHTNESS, 50);
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#endif
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#if CONTROL_CONTRAST
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declare_value (CONTRAST, 0);
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#endif
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#define update(name, channel, current_value) \
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if (!g_strcmp0(channel->label, #name)) { \
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if (current_value >= channel->max_value) \
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incrementing_##name = FALSE; \
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else if (current_value <= channel->min_value) \
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incrementing_##name = TRUE; \
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current_##name += incrementing_##name ? 10 : -10; \
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g_print("new " #name ": %d\n", current_##name); \
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return current_##name; \
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}
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static gint
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compute_value (GstColorBalanceChannel * channel, gint current_value)
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{
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#if CONTROL_SATURATION
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update (SATURATION, channel, current_value);
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#endif
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#if CONTROL_BRIGHTNESS
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update (BRIGHTNESS, channel, current_value);
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#endif
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#if CONTROL_CONTRAST
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update (CONTRAST, channel, current_value);
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#endif
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return current_value;
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}
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static gboolean
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process (gpointer data)
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{
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GstColorBalance *balance = (GstColorBalance *) data;
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const GList *controls;
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GstColorBalanceChannel *channel;
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const GList *item;
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gint index, new_value, current_value;
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controls = gst_color_balance_list_channels (balance);
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if (controls == NULL) {
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g_printerr ("There is no list of colorbalance controls\n");
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return G_SOURCE_REMOVE;
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}
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for (item = controls, index = 0; item != NULL; item = item->next, ++index) {
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channel = item->data;
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current_value = gst_color_balance_get_value (balance, channel);
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new_value = compute_value (channel, current_value);
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gst_color_balance_set_value (balance, channel, new_value);
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}
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return G_SOURCE_CONTINUE;
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}
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int
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main (int argc, char **argv)
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{
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GMainLoop *loop;
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GstElement *pipeline;
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GError *error = NULL;
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GstElement *src;
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GstColorBalance *balance;
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gst_init (&argc, &argv);
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loop = g_main_loop_new (NULL, FALSE);
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pipeline = gst_parse_launch (PIPELINE, &error);
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if (error != NULL) {
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g_printerr ("Error parsing '%s': %s", PIPELINE, error->message);
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g_error_free (error);
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return -1;
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}
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gst_element_set_state (pipeline, GST_STATE_PLAYING);
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src = gst_bin_get_by_name (GST_BIN (pipeline), "src");
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if (!src) {
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g_printerr ("Source element not found\n");
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return -2;
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}
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balance = GST_COLOR_BALANCE (src);
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g_timeout_add_seconds (1, process, balance);
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g_main_loop_run (loop);
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gst_object_unref (src);
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gst_element_set_state (pipeline, GST_STATE_NULL);
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return 0;
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}
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