/* GStreamer dynamic effect change test app * Copyright (C) 2012 Tim-Philipp Müller <tim centricular net> * 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. * * Based on python script by Thiago Sousa Santos */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include <gst/gst.h> static gchar *opt_effects = NULL; #define DEFAULT_EFFECTS "identity,exclusion,navigationtest," \ "agingtv,videoflip,vertigotv,gaussianblur,shagadelictv,edgetv" static GstPad *blockpad; static GstElement *conv_before; static GstElement *conv_after; static GstElement *cur_effect; static GstElement *pipeline; static GQueue effects = G_QUEUE_INIT; static GstPadProbeReturn event_probe_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data) { GMainLoop *loop = user_data; GstElement *next; if (GST_EVENT_TYPE (GST_PAD_PROBE_INFO_DATA (info)) != GST_EVENT_EOS) return GST_PAD_PROBE_OK; gst_pad_remove_probe (pad, GST_PAD_PROBE_INFO_ID (info)); /* push current event back into the queue */ g_queue_push_tail (&effects, gst_object_ref (cur_effect)); /* take next effect from the queue */ next = g_queue_pop_head (&effects); if (next == NULL) { GST_DEBUG_OBJECT (pad, "no more effects"); g_main_loop_quit (loop); return GST_PAD_PROBE_DROP; } g_print ("Switching from '%s' to '%s'..\n", GST_OBJECT_NAME (cur_effect), GST_OBJECT_NAME (next)); gst_element_set_state (cur_effect, GST_STATE_NULL); /* remove unlinks automatically */ GST_DEBUG_OBJECT (pipeline, "removing %" GST_PTR_FORMAT, cur_effect); gst_bin_remove (GST_BIN (pipeline), cur_effect); GST_DEBUG_OBJECT (pipeline, "adding %" GST_PTR_FORMAT, next); gst_bin_add (GST_BIN (pipeline), next); GST_DEBUG_OBJECT (pipeline, "linking.."); gst_element_link_many (conv_before, next, conv_after, NULL); gst_element_set_state (next, GST_STATE_PLAYING); cur_effect = next; GST_DEBUG_OBJECT (pipeline, "done"); return GST_PAD_PROBE_DROP; } static GstPadProbeReturn pad_probe_cb (GstPad * pad, GstPadProbeInfo * info, gpointer user_data) { GstPad *srcpad, *sinkpad; GST_DEBUG_OBJECT (pad, "pad is blocked now"); /* remove the probe first */ gst_pad_remove_probe (pad, GST_PAD_PROBE_INFO_ID (info)); /* install new probe for EOS */ srcpad = gst_element_get_static_pad (cur_effect, "src"); gst_pad_add_probe (srcpad, GST_PAD_PROBE_TYPE_BLOCK | GST_PAD_PROBE_TYPE_EVENT_DOWNSTREAM, event_probe_cb, user_data, NULL); gst_object_unref (srcpad); /* push EOS into the element, the probe will be fired when the * EOS leaves the effect and it has thus drained all of its data */ sinkpad = gst_element_get_static_pad (cur_effect, "sink"); gst_pad_send_event (sinkpad, gst_event_new_eos ()); gst_object_unref (sinkpad); return GST_PAD_PROBE_OK; } static gboolean timeout_cb (gpointer user_data) { gst_pad_add_probe (blockpad, GST_PAD_PROBE_TYPE_BLOCK_DOWNSTREAM, pad_probe_cb, user_data, NULL); return TRUE; } static gboolean bus_cb (GstBus * bus, GstMessage * msg, gpointer user_data) { GMainLoop *loop = user_data; switch (GST_MESSAGE_TYPE (msg)) { case GST_MESSAGE_ERROR:{ GError *err = NULL; gchar *dbg; gst_message_parse_error (msg, &err, &dbg); gst_object_default_error (msg->src, err, dbg); g_error_free (err); g_free (dbg); g_main_loop_quit (loop); break; } default: break; } return TRUE; } int main (int argc, char **argv) { GOptionEntry options[] = { {"effects", 'e', 0, G_OPTION_ARG_STRING, &opt_effects, "Effects to use (comma-separated list of element names)", NULL}, {NULL} }; GOptionContext *ctx; GError *err = NULL; GMainLoop *loop; GstElement *src, *q1, *q2, *effect, *filter1, *filter2, *sink; gchar **effect_names, **e; ctx = g_option_context_new (""); g_option_context_add_main_entries (ctx, options, GETTEXT_PACKAGE); g_option_context_add_group (ctx, gst_init_get_option_group ()); if (!g_option_context_parse (ctx, &argc, &argv, &err)) { g_print ("Error initializing: %s\n", err->message); return 1; } g_option_context_free (ctx); GST_FIXME ("Multiple things to check/fix, see source code"); if (opt_effects != NULL) effect_names = g_strsplit (opt_effects, ",", -1); else effect_names = g_strsplit (DEFAULT_EFFECTS, ",", -1); for (e = effect_names; e != NULL && *e != NULL; ++e) { GstElement *el; el = gst_element_factory_make (*e, NULL); if (el) { g_print ("Adding effect '%s'\n", *e); g_queue_push_tail (&effects, el); } } pipeline = gst_pipeline_new ("pipeline"); src = gst_element_factory_make ("videotestsrc", NULL); g_object_set (src, "is-live", TRUE, NULL); filter1 = gst_element_factory_make ("capsfilter", NULL); gst_util_set_object_arg (G_OBJECT (filter1), "caps", "video/x-raw, width=320, height=240, " "format={ I420, YV12, YUY2, UYVY, AYUV, Y41B, Y42B, " "YVYU, Y444, v210, v216, NV12, NV21, UYVP, A420, YUV9, YVU9, IYU1 }"); q1 = gst_element_factory_make ("queue", NULL); blockpad = gst_element_get_static_pad (q1, "src"); conv_before = gst_element_factory_make ("videoconvert", NULL); effect = g_queue_pop_head (&effects); cur_effect = effect; conv_after = gst_element_factory_make ("videoconvert", NULL); q2 = gst_element_factory_make ("queue", NULL); filter2 = gst_element_factory_make ("capsfilter", NULL); gst_util_set_object_arg (G_OBJECT (filter2), "caps", "video/x-raw, width=320, height=240, " "format={ RGBx, BGRx, xRGB, xBGR, RGBA, BGRA, ARGB, ABGR, RGB, BGR }"); sink = gst_element_factory_make ("ximagesink", NULL); gst_bin_add_many (GST_BIN (pipeline), src, filter1, q1, conv_before, effect, conv_after, q2, sink, NULL); gst_element_link_many (src, filter1, q1, conv_before, effect, conv_after, q2, sink, NULL); gst_element_set_state (pipeline, GST_STATE_PLAYING); loop = g_main_loop_new (NULL, FALSE); gst_bus_add_watch (GST_ELEMENT_BUS (pipeline), bus_cb, loop); g_timeout_add_seconds (1, timeout_cb, loop); g_main_loop_run (loop); gst_element_set_state (pipeline, GST_STATE_NULL); gst_object_unref (pipeline); return 0; }